cpython-lru_cache-weakref: Lib/subprocess.py annotate

annotate Lib/subprocess.py @ 37850:ebe59cd18273

Use explicit relative import for an, ehm, relative import.

author	Thomas Wouters <thomas@python.org>
date	Tue, 18 Apr 2006 21:41:36 +0000
parents	c048a09d06ff
children	f731859e9b3b

rev	line source
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1 # subprocess - Subprocesses with accessible I/O streams
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	2 #
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	3 # For more information about this module, see PEP 324.
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	4 #
34624 5fde17b35472 Made the module compatible with Python 2.2 again. Peter Astrand <astrand@lysator.liu.se> parents: 34587 diff changeset	5 # This module should remain compatible with Python 2.2, see PEP 291.
5fde17b35472 Made the module compatible with Python 2.2 again. Peter Astrand <astrand@lysator.liu.se> parents: 34587 diff changeset	6 #
35633 45aaa436b945 Changed license header: Now simply referring to PSF. This closes bug Peter Astrand <astrand@lysator.liu.se> parents: 34818 diff changeset	7 # Copyright (c) 2003-2005 by Peter Astrand <astrand@lysator.liu.se>
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	8 #
34587 e9ec2ce340fd Added copyright notice: Peter Astrand <astrand@lysator.liu.se> parents: 34575 diff changeset	9 # Licensed to PSF under a Contributor Agreement.
35633 45aaa436b945 Changed license header: Now simply referring to PSF. This closes bug Peter Astrand <astrand@lysator.liu.se> parents: 34818 diff changeset	10 # See http://www.python.org/2.4/license for licensing details.
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	11
33776 c5d951a0e0c3 Fix docstring formatting of escape sequences. Raymond Hettinger <python@rcn.com> parents: 33770 diff changeset	12 r"""subprocess - Subprocesses with accessible I/O streams
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	13
33770 c6aac03474c5 return codes are available on all platforms, not just on Unix Fredrik Lundh <fredrik@pythonware.com> parents: 33751 diff changeset	14 This module allows you to spawn processes, connect to their
c6aac03474c5 return codes are available on all platforms, not just on Unix Fredrik Lundh <fredrik@pythonware.com> parents: 33751 diff changeset	15 input/output/error pipes, and obtain their return codes. This module
c6aac03474c5 return codes are available on all platforms, not just on Unix Fredrik Lundh <fredrik@pythonware.com> parents: 33751 diff changeset	16 intends to replace several other, older modules and functions, like:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	17
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	18 os.system
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	19 os.spawn*
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	20 os.popen*
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	21 popen2.*
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	22 commands.*
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	23
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	24 Information about how the subprocess module can be used to replace these
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	25 modules and functions can be found below.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	26
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	27
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	28
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	29 Using the subprocess module
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	30 ===========================
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	31 This module defines one class called Popen:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	32
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	33 class Popen(args, bufsize=0, executable=None,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	34 stdin=None, stdout=None, stderr=None,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	35 preexec_fn=None, close_fds=False, shell=False,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	36 cwd=None, env=None, universal_newlines=False,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	37 startupinfo=None, creationflags=0):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	38
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	39
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	40 Arguments are:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	41
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	42 args should be a string, or a sequence of program arguments. The
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	43 program to execute is normally the first item in the args sequence or
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	44 string, but can be explicitly set by using the executable argument.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	45
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	46 On UNIX, with shell=False (default): In this case, the Popen class
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	47 uses os.execvp() to execute the child program. args should normally
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	48 be a sequence. A string will be treated as a sequence with the string
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	49 as the only item (the program to execute).
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	50
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	51 On UNIX, with shell=True: If args is a string, it specifies the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	52 command string to execute through the shell. If args is a sequence,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	53 the first item specifies the command string, and any additional items
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	54 will be treated as additional shell arguments.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	55
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	56 On Windows: the Popen class uses CreateProcess() to execute the child
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	57 program, which operates on strings. If args is a sequence, it will be
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	58 converted to a string using the list2cmdline method. Please note that
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	59 not all MS Windows applications interpret the command line the same
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	60 way: The list2cmdline is designed for applications using the same
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	61 rules as the MS C runtime.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	62
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	63 bufsize, if given, has the same meaning as the corresponding argument
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	64 to the built-in open() function: 0 means unbuffered, 1 means line
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	65 buffered, any other positive value means use a buffer of
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	66 (approximately) that size. A negative bufsize means to use the system
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	67 default, which usually means fully buffered. The default value for
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	68 bufsize is 0 (unbuffered).
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	69
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	70 stdin, stdout and stderr specify the executed programs' standard
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	71 input, standard output and standard error file handles, respectively.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	72 Valid values are PIPE, an existing file descriptor (a positive
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	73 integer), an existing file object, and None. PIPE indicates that a
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	74 new pipe to the child should be created. With None, no redirection
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	75 will occur; the child's file handles will be inherited from the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	76 parent. Additionally, stderr can be STDOUT, which indicates that the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	77 stderr data from the applications should be captured into the same
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	78 file handle as for stdout.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	79
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	80 If preexec_fn is set to a callable object, this object will be called
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	81 in the child process just before the child is executed.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	82
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	83 If close_fds is true, all file descriptors except 0, 1 and 2 will be
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	84 closed before the child process is executed.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	85
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	86 if shell is true, the specified command will be executed through the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	87 shell.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	88
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	89 If cwd is not None, the current directory will be changed to cwd
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	90 before the child is executed.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	91
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	92 If env is not None, it defines the environment variables for the new
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	93 process.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	94
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	95 If universal_newlines is true, the file objects stdout and stderr are
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	96 opened as a text files, but lines may be terminated by any of '\n',
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	97 the Unix end-of-line convention, '\r', the Macintosh convention or
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	98 '\r\n', the Windows convention. All of these external representations
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	99 are seen as '\n' by the Python program. Note: This feature is only
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	100 available if Python is built with universal newline support (the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	101 default). Also, the newlines attribute of the file objects stdout,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	102 stdin and stderr are not updated by the communicate() method.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	103
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	104 The startupinfo and creationflags, if given, will be passed to the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	105 underlying CreateProcess() function. They can specify things such as
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	106 appearance of the main window and priority for the new process.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	107 (Windows only)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	108
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	109
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	110 This module also defines two shortcut functions:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	111
34111 73b09c2b788b Changed signature of call function to avoid confusion: this 'args' is not the same as the one to the Popen constructor Peter Astrand <astrand@lysator.liu.se> parents: 34052 diff changeset	112 call(popenargs, *kwargs):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	113 Run command with arguments. Wait for command to complete, then
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	114 return the returncode attribute.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	115
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	116 The arguments are the same as for the Popen constructor. Example:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	117
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	118 retcode = call(["ls", "-l"])
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	119
34302 998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	120 check_call(popenargs, *kwargs):
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	121 Run command with arguments. Wait for command to complete. If the
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	122 exit code was zero then return, otherwise raise
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	123 CalledProcessError. The CalledProcessError object will have the
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	124 return code in the errno attribute.
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	125
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	126 The arguments are the same as for the Popen constructor. Example:
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	127
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	128 check_call(["ls", "-l"])
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	129
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	130 Exceptions
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	131 ----------
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	132 Exceptions raised in the child process, before the new program has
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	133 started to execute, will be re-raised in the parent. Additionally,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	134 the exception object will have one extra attribute called
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	135 'child_traceback', which is a string containing traceback information
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	136 from the childs point of view.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	137
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	138 The most common exception raised is OSError. This occurs, for
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	139 example, when trying to execute a non-existent file. Applications
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	140 should prepare for OSErrors.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	141
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	142 A ValueError will be raised if Popen is called with invalid arguments.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	143
34302 998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	144 check_call() will raise CalledProcessError, which is a subclass of
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	145 OSError, if the called process returns a non-zero return code.
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	146
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	147
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	148 Security
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	149 --------
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	150 Unlike some other popen functions, this implementation will never call
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	151 /bin/sh implicitly. This means that all characters, including shell
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	152 metacharacters, can safely be passed to child processes.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	153
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	154
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	155 Popen objects
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	156 =============
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	157 Instances of the Popen class have the following methods:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	158
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	159 poll()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	160 Check if child process has terminated. Returns returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	161 attribute.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	162
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	163 wait()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	164 Wait for child process to terminate. Returns returncode attribute.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	165
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	166 communicate(input=None)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	167 Interact with process: Send data to stdin. Read data from stdout
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	168 and stderr, until end-of-file is reached. Wait for process to
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	169 terminate. The optional stdin argument should be a string to be
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	170 sent to the child process, or None, if no data should be sent to
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	171 the child.
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	172
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	173 communicate() returns a tuple (stdout, stderr).
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	174
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	175 Note: The data read is buffered in memory, so do not use this
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	176 method if the data size is large or unlimited.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	177
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	178 The following attributes are also available:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	179
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	180 stdin
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	181 If the stdin argument is PIPE, this attribute is a file object
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	182 that provides input to the child process. Otherwise, it is None.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	183
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	184 stdout
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	185 If the stdout argument is PIPE, this attribute is a file object
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	186 that provides output from the child process. Otherwise, it is
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	187 None.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	188
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	189 stderr
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	190 If the stderr argument is PIPE, this attribute is file object that
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	191 provides error output from the child process. Otherwise, it is
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	192 None.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	193
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	194 pid
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	195 The process ID of the child process.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	196
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	197 returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	198 The child return code. A None value indicates that the process
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	199 hasn't terminated yet. A negative value -N indicates that the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	200 child was terminated by signal N (UNIX only).
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	201
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	202
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	203 Replacing older functions with the subprocess module
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	204 ====================================================
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	205 In this section, "a ==> b" means that b can be used as a replacement
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	206 for a.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	207
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	208 Note: All functions in this section fail (more or less) silently if
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	209 the executed program cannot be found; this module raises an OSError
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	210 exception.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	211
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	212 In the following examples, we assume that the subprocess module is
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	213 imported with "from subprocess import *".
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	214
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	215
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	216 Replacing /bin/sh shell backquote
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	217 ---------------------------------
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	218 output=`mycmd myarg`
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	219 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	220 output = Popen(["mycmd", "myarg"], stdout=PIPE).communicate()[0]
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	221
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	222
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	223 Replacing shell pipe line
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	224 -------------------------
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	225 output=`dmesg \| grep hda`
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	226 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	227 p1 = Popen(["dmesg"], stdout=PIPE)
34050 fd1be494c31b Corrected example for replacing shell pipeline. Fixes bug 1073790. Peter Astrand <astrand@lysator.liu.se> parents: 33929 diff changeset	228 p2 = Popen(["grep", "hda"], stdin=p1.stdout, stdout=PIPE)
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	229 output = p2.communicate()[0]
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	230
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	231
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	232 Replacing os.system()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	233 ---------------------
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	234 sts = os.system("mycmd" + " myarg")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	235 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	236 p = Popen("mycmd" + " myarg", shell=True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	237 sts = os.waitpid(p.pid, 0)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	238
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	239 Note:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	240
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	241 * Calling the program through the shell is usually not required.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	242
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	243 * It's easier to look at the returncode attribute than the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	244 exitstatus.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	245
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	246 A more real-world example would look like this:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	247
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	248 try:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	249 retcode = call("mycmd" + " myarg", shell=True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	250 if retcode < 0:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	251 print >>sys.stderr, "Child was terminated by signal", -retcode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	252 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	253 print >>sys.stderr, "Child returned", retcode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	254 except OSError, e:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	255 print >>sys.stderr, "Execution failed:", e
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	256
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	257
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	258 Replacing os.spawn*
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	259 -------------------
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	260 P_NOWAIT example:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	261
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	262 pid = os.spawnlp(os.P_NOWAIT, "/bin/mycmd", "mycmd", "myarg")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	263 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	264 pid = Popen(["/bin/mycmd", "myarg"]).pid
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	265
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	266
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	267 P_WAIT example:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	268
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	269 retcode = os.spawnlp(os.P_WAIT, "/bin/mycmd", "mycmd", "myarg")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	270 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	271 retcode = call(["/bin/mycmd", "myarg"])
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	272
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	273
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	274 Vector example:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	275
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	276 os.spawnvp(os.P_NOWAIT, path, args)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	277 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	278 Popen([path] + args[1:])
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	279
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	280
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	281 Environment example:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	282
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	283 os.spawnlpe(os.P_NOWAIT, "/bin/mycmd", "mycmd", "myarg", env)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	284 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	285 Popen(["/bin/mycmd", "myarg"], env={"PATH": "/usr/bin"})
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	286
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	287
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	288 Replacing os.popen*
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	289 -------------------
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	290 pipe = os.popen(cmd, mode='r', bufsize)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	291 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	292 pipe = Popen(cmd, shell=True, bufsize=bufsize, stdout=PIPE).stdout
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	293
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	294 pipe = os.popen(cmd, mode='w', bufsize)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	295 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	296 pipe = Popen(cmd, shell=True, bufsize=bufsize, stdin=PIPE).stdin
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	297
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	298
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	299 (child_stdin, child_stdout) = os.popen2(cmd, mode, bufsize)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	300 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	301 p = Popen(cmd, shell=True, bufsize=bufsize,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	302 stdin=PIPE, stdout=PIPE, close_fds=True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	303 (child_stdin, child_stdout) = (p.stdin, p.stdout)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	304
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	305
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	306 (child_stdin,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	307 child_stdout,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	308 child_stderr) = os.popen3(cmd, mode, bufsize)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	309 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	310 p = Popen(cmd, shell=True, bufsize=bufsize,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	311 stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	312 (child_stdin,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	313 child_stdout,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	314 child_stderr) = (p.stdin, p.stdout, p.stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	315
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	316
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	317 (child_stdin, child_stdout_and_stderr) = os.popen4(cmd, mode, bufsize)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	318 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	319 p = Popen(cmd, shell=True, bufsize=bufsize,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	320 stdin=PIPE, stdout=PIPE, stderr=STDOUT, close_fds=True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	321 (child_stdin, child_stdout_and_stderr) = (p.stdin, p.stdout)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	322
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	323
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	324 Replacing popen2.*
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	325 ------------------
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	326 Note: If the cmd argument to popen2 functions is a string, the command
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	327 is executed through /bin/sh. If it is a list, the command is directly
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	328 executed.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	329
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	330 (child_stdout, child_stdin) = popen2.popen2("somestring", bufsize, mode)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	331 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	332 p = Popen(["somestring"], shell=True, bufsize=bufsize
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	333 stdin=PIPE, stdout=PIPE, close_fds=True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	334 (child_stdout, child_stdin) = (p.stdout, p.stdin)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	335
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	336
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	337 (child_stdout, child_stdin) = popen2.popen2(["mycmd", "myarg"], bufsize, mode)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	338 ==>
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	339 p = Popen(["mycmd", "myarg"], bufsize=bufsize,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	340 stdin=PIPE, stdout=PIPE, close_fds=True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	341 (child_stdout, child_stdin) = (p.stdout, p.stdin)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	342
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	343 The popen2.Popen3 and popen3.Popen4 basically works as subprocess.Popen,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	344 except that:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	345
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	346 * subprocess.Popen raises an exception if the execution fails
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	347 * the capturestderr argument is replaced with the stderr argument.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	348 * stdin=PIPE and stdout=PIPE must be specified.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	349 * popen2 closes all filedescriptors by default, but you have to specify
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	350 close_fds=True with subprocess.Popen.
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	351
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	352
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	353 """
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	354
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	355 import sys
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	356 mswindows = (sys.platform == "win32")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	357
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	358 import os
34624 5fde17b35472 Made the module compatible with Python 2.2 again. Peter Astrand <astrand@lysator.liu.se> parents: 34587 diff changeset	359 import types
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	360 import traceback
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	361
34302 998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	362 # Exception classes used by this module.
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	363 class CalledProcessError(OSError):
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	364 """This exception is raised when a process run by check_call() returns
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	365 a non-zero exit status. The exit status will be stored in the
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	366 errno attribute. This exception is a subclass of
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	367 OSError."""
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	368
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	369 if mswindows:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	370 import threading
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	371 import msvcrt
33751 aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	372 if 0: # <-- change this to use pywin32 instead of the _subprocess driver
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	373 import pywintypes
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	374 from win32api import GetStdHandle, STD_INPUT_HANDLE, \
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	375 STD_OUTPUT_HANDLE, STD_ERROR_HANDLE
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	376 from win32api import GetCurrentProcess, DuplicateHandle, \
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	377 GetModuleFileName, GetVersion
33929 66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	378 from win32con import DUPLICATE_SAME_ACCESS, SW_HIDE
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	379 from win32pipe import CreatePipe
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	380 from win32process import CreateProcess, STARTUPINFO, \
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	381 GetExitCodeProcess, STARTF_USESTDHANDLES, \
33929 66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	382 STARTF_USESHOWWINDOW, CREATE_NEW_CONSOLE
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	383 from win32event import WaitForSingleObject, INFINITE, WAIT_OBJECT_0
33751 aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	384 else:
aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	385 from _subprocess import *
aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	386 class STARTUPINFO:
aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	387 dwFlags = 0
aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	388 hStdInput = None
aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	389 hStdOutput = None
aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	390 hStdError = None
aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	391 class pywintypes:
aa2d6060495a Replace dynamic try/except with "if 0", to keep py2exe happy. If you Fredrik Lundh <fredrik@pythonware.com> parents: 33735 diff changeset	392 error = IOError
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	393 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	394 import select
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	395 import errno
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	396 import fcntl
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	397 import pickle
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	398
34302 998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	399 __all__ = ["Popen", "PIPE", "STDOUT", "call", "check_call", "CalledProcessError"]
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	400
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	401 try:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	402 MAXFD = os.sysconf("SC_OPEN_MAX")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	403 except:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	404 MAXFD = 256
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	405
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	406 # True/False does not exist on 2.2.0
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	407 try:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	408 False
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	409 except NameError:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	410 False = 0
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	411 True = 1
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	412
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	413 _active = []
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	414
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	415 def _cleanup():
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	416 for inst in _active[:]:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	417 inst.poll()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	418
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	419 PIPE = -1
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	420 STDOUT = -2
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	421
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	422
34111 73b09c2b788b Changed signature of call function to avoid confusion: this 'args' is not the same as the one to the Popen constructor Peter Astrand <astrand@lysator.liu.se> parents: 34052 diff changeset	423 def call(popenargs, *kwargs):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	424 """Run command with arguments. Wait for command to complete, then
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	425 return the returncode attribute.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	426
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	427 The arguments are the same as for the Popen constructor. Example:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	428
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	429 retcode = call(["ls", "-l"])
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	430 """
34111 73b09c2b788b Changed signature of call function to avoid confusion: this 'args' is not the same as the one to the Popen constructor Peter Astrand <astrand@lysator.liu.se> parents: 34052 diff changeset	431 return Popen(popenargs, *kwargs).wait()
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	432
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	433
34302 998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	434 def check_call(popenargs, *kwargs):
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	435 """Run command with arguments. Wait for command to complete. If
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	436 the exit code was zero then return, otherwise raise
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	437 CalledProcessError. The CalledProcessError object will have the
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	438 return code in the errno attribute.
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	439
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	440 The arguments are the same as for the Popen constructor. Example:
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	441
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	442 check_call(["ls", "-l"])
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	443 """
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	444 retcode = call(popenargs, *kwargs)
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	445 cmd = kwargs.get("args")
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	446 if cmd is None:
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	447 cmd = popenargs[0]
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	448 if retcode:
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	449 raise CalledProcessError(retcode, "Command %s returned non-zero exit status" % cmd)
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	450 return retcode
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	451
998fb1e1c8e9 New subprocess utility function: check_call. Closes #1071764. Peter Astrand <astrand@lysator.liu.se> parents: 34111 diff changeset	452
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	453 def list2cmdline(seq):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	454 """
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	455 Translate a sequence of arguments into a command line
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	456 string, using the same rules as the MS C runtime:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	457
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	458 1) Arguments are delimited by white space, which is either a
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	459 space or a tab.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	460
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	461 2) A string surrounded by double quotation marks is
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	462 interpreted as a single argument, regardless of white space
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	463 contained within. A quoted string can be embedded in an
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	464 argument.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	465
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	466 3) A double quotation mark preceded by a backslash is
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	467 interpreted as a literal double quotation mark.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	468
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	469 4) Backslashes are interpreted literally, unless they
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	470 immediately precede a double quotation mark.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	471
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	472 5) If backslashes immediately precede a double quotation mark,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	473 every pair of backslashes is interpreted as a literal
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	474 backslash. If the number of backslashes is odd, the last
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	475 backslash escapes the next double quotation mark as
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	476 described in rule 3.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	477 """
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	478
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	479 # See
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	480 # http://msdn.microsoft.com/library/en-us/vccelng/htm/progs_12.asp
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	481 result = []
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	482 needquote = False
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	483 for arg in seq:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	484 bs_buf = []
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	485
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	486 # Add a space to separate this argument from the others
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	487 if result:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	488 result.append(' ')
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	489
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	490 needquote = (" " in arg) or ("\t" in arg)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	491 if needquote:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	492 result.append('"')
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	493
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	494 for c in arg:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	495 if c == '\\':
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	496 # Don't know if we need to double yet.
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	497 bs_buf.append(c)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	498 elif c == '"':
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	499 # Double backspaces.
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	500 result.append('\\' * len(bs_buf)*2)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	501 bs_buf = []
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	502 result.append('\\"')
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	503 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	504 # Normal char
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	505 if bs_buf:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	506 result.extend(bs_buf)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	507 bs_buf = []
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	508 result.append(c)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	509
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	510 # Add remaining backspaces, if any.
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	511 if bs_buf:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	512 result.extend(bs_buf)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	513
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	514 if needquote:
34675 8f0456425715 Corrected bug in list2cmdline wrt backslashes. Fixes #1083306. Peter Astrand <astrand@lysator.liu.se> parents: 34672 diff changeset	515 result.extend(bs_buf)
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	516 result.append('"')
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	517
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	518 return ''.join(result)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	519
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	520
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	521 class Popen(object):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	522 def __init__(self, args, bufsize=0, executable=None,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	523 stdin=None, stdout=None, stderr=None,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	524 preexec_fn=None, close_fds=False, shell=False,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	525 cwd=None, env=None, universal_newlines=False,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	526 startupinfo=None, creationflags=0):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	527 """Create new Popen instance."""
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	528 _cleanup()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	529
34052 79d2ae0a62ef Raise TypeError if bufsize argument is not an integer. Patch 1071755, slightly modified. Peter Astrand <astrand@lysator.liu.se> parents: 34050 diff changeset	530 if not isinstance(bufsize, (int, long)):
79d2ae0a62ef Raise TypeError if bufsize argument is not an integer. Patch 1071755, slightly modified. Peter Astrand <astrand@lysator.liu.se> parents: 34050 diff changeset	531 raise TypeError("bufsize must be an integer")
79d2ae0a62ef Raise TypeError if bufsize argument is not an integer. Patch 1071755, slightly modified. Peter Astrand <astrand@lysator.liu.se> parents: 34050 diff changeset	532
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	533 if mswindows:
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	534 if preexec_fn is not None:
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	535 raise ValueError("preexec_fn is not supported on Windows "
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	536 "platforms")
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	537 if close_fds:
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	538 raise ValueError("close_fds is not supported on Windows "
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	539 "platforms")
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	540 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	541 # POSIX
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	542 if startupinfo is not None:
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	543 raise ValueError("startupinfo is only supported on Windows "
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	544 "platforms")
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	545 if creationflags != 0:
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	546 raise ValueError("creationflags is only supported on Windows "
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	547 "platforms")
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	548
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	549 self.stdin = None
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	550 self.stdout = None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	551 self.stderr = None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	552 self.pid = None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	553 self.returncode = None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	554 self.universal_newlines = universal_newlines
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	555
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	556 # Input and output objects. The general principle is like
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	557 # this:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	558 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	559 # Parent Child
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	560 # ------ -----
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	561 # p2cwrite ---stdin---> p2cread
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	562 # c2pread <--stdout--- c2pwrite
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	563 # errread <--stderr--- errwrite
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	564 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	565 # On POSIX, the child objects are file descriptors. On
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	566 # Windows, these are Windows file handles. The parent objects
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	567 # are file descriptors on both platforms. The parent objects
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	568 # are None when not using PIPEs. The child objects are None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	569 # when not redirecting.
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	570
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	571 (p2cread, p2cwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	572 c2pread, c2pwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	573 errread, errwrite) = self._get_handles(stdin, stdout, stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	574
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	575 self._execute_child(args, executable, preexec_fn, close_fds,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	576 cwd, env, universal_newlines,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	577 startupinfo, creationflags, shell,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	578 p2cread, p2cwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	579 c2pread, c2pwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	580 errread, errwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	581
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	582 if p2cwrite:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	583 self.stdin = os.fdopen(p2cwrite, 'wb', bufsize)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	584 if c2pread:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	585 if universal_newlines:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	586 self.stdout = os.fdopen(c2pread, 'rU', bufsize)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	587 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	588 self.stdout = os.fdopen(c2pread, 'rb', bufsize)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	589 if errread:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	590 if universal_newlines:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	591 self.stderr = os.fdopen(errread, 'rU', bufsize)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	592 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	593 self.stderr = os.fdopen(errread, 'rb', bufsize)
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	594
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	595 _active.append(self)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	596
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	597
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	598 def _translate_newlines(self, data):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	599 data = data.replace("\r\n", "\n")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	600 data = data.replace("\r", "\n")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	601 return data
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	602
34672 085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	603 def communicate(self, input=None):
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	604 """Interact with process: Send data to stdin. Read data from
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	605 stdout and stderr, until end-of-file is reached. Wait for
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	606 process to terminate. The optional input argument should be a
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	607 string to be sent to the child process, or None, if no data
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	608 should be sent to the child.
34818 4eaab38566c9 Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 34675 diff changeset	609
34672 085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	610 communicate() returns a tuple (stdout, stderr)."""
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	611
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	612 # Optimization: If we are only using one pipe, or no pipe at
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	613 # all, using select() or threads is unnecessary.
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	614 if [self.stdin, self.stdout, self.stderr].count(None) >= 2:
34818 4eaab38566c9 Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 34675 diff changeset	615 stdout = None
4eaab38566c9 Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 34675 diff changeset	616 stderr = None
34672 085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	617 if self.stdin:
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	618 if input:
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	619 self.stdin.write(input)
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	620 self.stdin.close()
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	621 elif self.stdout:
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	622 stdout = self.stdout.read()
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	623 elif self.stderr:
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	624 stderr = self.stderr.read()
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	625 self.wait()
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	626 return (stdout, stderr)
34818 4eaab38566c9 Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 34675 diff changeset	627
34672 085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	628 return self._communicate(input)
085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	629
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	630
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	631 if mswindows:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	632 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	633 # Windows methods
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	634 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	635 def _get_handles(self, stdin, stdout, stderr):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	636 """Construct and return tupel with IO objects:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	637 p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	638 """
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	639 if stdin is None and stdout is None and stderr is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	640 return (None, None, None, None, None, None)
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	641
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	642 p2cread, p2cwrite = None, None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	643 c2pread, c2pwrite = None, None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	644 errread, errwrite = None, None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	645
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	646 if stdin is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	647 p2cread = GetStdHandle(STD_INPUT_HANDLE)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	648 elif stdin == PIPE:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	649 p2cread, p2cwrite = CreatePipe(None, 0)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	650 # Detach and turn into fd
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	651 p2cwrite = p2cwrite.Detach()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	652 p2cwrite = msvcrt.open_osfhandle(p2cwrite, 0)
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	653 elif isinstance(stdin, int):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	654 p2cread = msvcrt.get_osfhandle(stdin)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	655 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	656 # Assuming file-like object
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	657 p2cread = msvcrt.get_osfhandle(stdin.fileno())
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	658 p2cread = self._make_inheritable(p2cread)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	659
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	660 if stdout is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	661 c2pwrite = GetStdHandle(STD_OUTPUT_HANDLE)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	662 elif stdout == PIPE:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	663 c2pread, c2pwrite = CreatePipe(None, 0)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	664 # Detach and turn into fd
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	665 c2pread = c2pread.Detach()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	666 c2pread = msvcrt.open_osfhandle(c2pread, 0)
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	667 elif isinstance(stdout, int):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	668 c2pwrite = msvcrt.get_osfhandle(stdout)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	669 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	670 # Assuming file-like object
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	671 c2pwrite = msvcrt.get_osfhandle(stdout.fileno())
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	672 c2pwrite = self._make_inheritable(c2pwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	673
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	674 if stderr is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	675 errwrite = GetStdHandle(STD_ERROR_HANDLE)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	676 elif stderr == PIPE:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	677 errread, errwrite = CreatePipe(None, 0)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	678 # Detach and turn into fd
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	679 errread = errread.Detach()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	680 errread = msvcrt.open_osfhandle(errread, 0)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	681 elif stderr == STDOUT:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	682 errwrite = c2pwrite
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	683 elif isinstance(stderr, int):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	684 errwrite = msvcrt.get_osfhandle(stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	685 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	686 # Assuming file-like object
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	687 errwrite = msvcrt.get_osfhandle(stderr.fileno())
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	688 errwrite = self._make_inheritable(errwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	689
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	690 return (p2cread, p2cwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	691 c2pread, c2pwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	692 errread, errwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	693
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	694
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	695 def _make_inheritable(self, handle):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	696 """Return a duplicate of handle, which is inheritable"""
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	697 return DuplicateHandle(GetCurrentProcess(), handle,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	698 GetCurrentProcess(), 0, 1,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	699 DUPLICATE_SAME_ACCESS)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	700
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	701
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	702 def _find_w9xpopen(self):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	703 """Find and return absolut path to w9xpopen.exe"""
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	704 w9xpopen = os.path.join(os.path.dirname(GetModuleFileName(0)),
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	705 "w9xpopen.exe")
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	706 if not os.path.exists(w9xpopen):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	707 # Eeek - file-not-found - possibly an embedding
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	708 # situation - see if we can locate it in sys.exec_prefix
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	709 w9xpopen = os.path.join(os.path.dirname(sys.exec_prefix),
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	710 "w9xpopen.exe")
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	711 if not os.path.exists(w9xpopen):
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	712 raise RuntimeError("Cannot locate w9xpopen.exe, which is "
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	713 "needed for Popen to work with your "
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	714 "shell or platform.")
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	715 return w9xpopen
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	716
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	717
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	718 def _execute_child(self, args, executable, preexec_fn, close_fds,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	719 cwd, env, universal_newlines,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	720 startupinfo, creationflags, shell,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	721 p2cread, p2cwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	722 c2pread, c2pwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	723 errread, errwrite):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	724 """Execute program (MS Windows version)"""
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	725
34624 5fde17b35472 Made the module compatible with Python 2.2 again. Peter Astrand <astrand@lysator.liu.se> parents: 34587 diff changeset	726 if not isinstance(args, types.StringTypes):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	727 args = list2cmdline(args)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	728
33929 66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	729 # Process startup details
66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	730 default_startupinfo = STARTUPINFO()
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	731 if startupinfo is None:
33929 66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	732 startupinfo = default_startupinfo
66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	733 if not None in (p2cread, c2pwrite, errwrite):
66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	734 startupinfo.dwFlags \|= STARTF_USESTDHANDLES
66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	735 startupinfo.hStdInput = p2cread
66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	736 startupinfo.hStdOutput = c2pwrite
66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	737 startupinfo.hStdError = errwrite
66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	738
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	739 if shell:
33929 66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	740 default_startupinfo.dwFlags \|= STARTF_USESHOWWINDOW
66223a9ebe48 When using shell=True on Windows, don't display a shell window by default. Fixes #1057061. Peter Astrand <astrand@lysator.liu.se> parents: 33776 diff changeset	741 default_startupinfo.wShowWindow = SW_HIDE
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	742 comspec = os.environ.get("COMSPEC", "cmd.exe")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	743 args = comspec + " /c " + args
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	744 if (GetVersion() >= 0x80000000L or
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	745 os.path.basename(comspec).lower() == "command.com"):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	746 # Win9x, or using command.com on NT. We need to
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	747 # use the w9xpopen intermediate program. For more
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	748 # information, see KB Q150956
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	749 # (http://web.archive.org/web/20011105084002/http://support.microsoft.com/support/kb/articles/Q150/9/56.asp)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	750 w9xpopen = self._find_w9xpopen()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	751 args = '"%s" %s' % (w9xpopen, args)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	752 # Not passing CREATE_NEW_CONSOLE has been known to
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	753 # cause random failures on win9x. Specifically a
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	754 # dialog: "Your program accessed mem currently in
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	755 # use at xxx" and a hopeful warning about the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	756 # stability of your system. Cost is Ctrl+C wont
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	757 # kill children.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	758 creationflags \|= CREATE_NEW_CONSOLE
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	759
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	760 # Start the process
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	761 try:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	762 hp, ht, pid, tid = CreateProcess(executable, args,
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	763 # no special security
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	764 None, None,
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	765 # must inherit handles to pass std
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	766 # handles
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	767 1,
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	768 creationflags,
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	769 env,
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	770 cwd,
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	771 startupinfo)
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	772 except pywintypes.error, e:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	773 # Translate pywintypes.error to WindowsError, which is
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	774 # a subclass of OSError. FIXME: We should really
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	775 # translate errno using _sys_errlist (or simliar), but
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	776 # how can this be done from Python?
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	777 raise WindowsError(*e.args)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	778
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	779 # Retain the process handle, but close the thread handle
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	780 self._handle = hp
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	781 self.pid = pid
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	782 ht.Close()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	783
33727 0236b6530c46 Typo fix Andrew M. Kuchling <amk@amk.ca> parents: 33723 diff changeset	784 # Child is launched. Close the parent's copy of those pipe
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	785 # handles that only the child should have open. You need
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	786 # to make sure that no handles to the write end of the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	787 # output pipe are maintained in this process or else the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	788 # pipe will not close when the child process exits and the
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	789 # ReadFile will hang.
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	790 if p2cread is not None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	791 p2cread.Close()
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	792 if c2pwrite is not None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	793 c2pwrite.Close()
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	794 if errwrite is not None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	795 errwrite.Close()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	796
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	797
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	798 def poll(self):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	799 """Check if child process has terminated. Returns returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	800 attribute."""
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	801 if self.returncode is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	802 if WaitForSingleObject(self._handle, 0) == WAIT_OBJECT_0:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	803 self.returncode = GetExitCodeProcess(self._handle)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	804 _active.remove(self)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	805 return self.returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	806
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	807
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	808 def wait(self):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	809 """Wait for child process to terminate. Returns returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	810 attribute."""
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	811 if self.returncode is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	812 obj = WaitForSingleObject(self._handle, INFINITE)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	813 self.returncode = GetExitCodeProcess(self._handle)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	814 _active.remove(self)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	815 return self.returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	816
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	817
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	818 def _readerthread(self, fh, buffer):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	819 buffer.append(fh.read())
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	820
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	821
34672 085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	822 def _communicate(self, input):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	823 stdout = None # Return
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	824 stderr = None # Return
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	825
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	826 if self.stdout:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	827 stdout = []
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	828 stdout_thread = threading.Thread(target=self._readerthread,
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	829 args=(self.stdout, stdout))
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	830 stdout_thread.setDaemon(True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	831 stdout_thread.start()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	832 if self.stderr:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	833 stderr = []
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	834 stderr_thread = threading.Thread(target=self._readerthread,
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	835 args=(self.stderr, stderr))
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	836 stderr_thread.setDaemon(True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	837 stderr_thread.start()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	838
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	839 if self.stdin:
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	840 if input is not None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	841 self.stdin.write(input)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	842 self.stdin.close()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	843
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	844 if self.stdout:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	845 stdout_thread.join()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	846 if self.stderr:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	847 stderr_thread.join()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	848
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	849 # All data exchanged. Translate lists into strings.
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	850 if stdout is not None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	851 stdout = stdout[0]
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	852 if stderr is not None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	853 stderr = stderr[0]
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	854
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	855 # Translate newlines, if requested. We cannot let the file
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	856 # object do the translation: It is based on stdio, which is
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	857 # impossible to combine with select (unless forcing no
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	858 # buffering).
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	859 if self.universal_newlines and hasattr(open, 'newlines'):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	860 if stdout:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	861 stdout = self._translate_newlines(stdout)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	862 if stderr:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	863 stderr = self._translate_newlines(stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	864
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	865 self.wait()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	866 return (stdout, stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	867
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	868 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	869 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	870 # POSIX methods
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	871 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	872 def _get_handles(self, stdin, stdout, stderr):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	873 """Construct and return tupel with IO objects:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	874 p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	875 """
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	876 p2cread, p2cwrite = None, None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	877 c2pread, c2pwrite = None, None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	878 errread, errwrite = None, None
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	879
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	880 if stdin is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	881 pass
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	882 elif stdin == PIPE:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	883 p2cread, p2cwrite = os.pipe()
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	884 elif isinstance(stdin, int):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	885 p2cread = stdin
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	886 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	887 # Assuming file-like object
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	888 p2cread = stdin.fileno()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	889
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	890 if stdout is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	891 pass
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	892 elif stdout == PIPE:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	893 c2pread, c2pwrite = os.pipe()
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	894 elif isinstance(stdout, int):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	895 c2pwrite = stdout
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	896 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	897 # Assuming file-like object
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	898 c2pwrite = stdout.fileno()
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	899
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	900 if stderr is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	901 pass
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	902 elif stderr == PIPE:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	903 errread, errwrite = os.pipe()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	904 elif stderr == STDOUT:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	905 errwrite = c2pwrite
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	906 elif isinstance(stderr, int):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	907 errwrite = stderr
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	908 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	909 # Assuming file-like object
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	910 errwrite = stderr.fileno()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	911
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	912 return (p2cread, p2cwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	913 c2pread, c2pwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	914 errread, errwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	915
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	916
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	917 def _set_cloexec_flag(self, fd):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	918 try:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	919 cloexec_flag = fcntl.FD_CLOEXEC
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	920 except AttributeError:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	921 cloexec_flag = 1
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	922
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	923 old = fcntl.fcntl(fd, fcntl.F_GETFD)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	924 fcntl.fcntl(fd, fcntl.F_SETFD, old \| cloexec_flag)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	925
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	926
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	927 def _close_fds(self, but):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	928 for i in range(3, MAXFD):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	929 if i == but:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	930 continue
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	931 try:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	932 os.close(i)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	933 except:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	934 pass
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	935
53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	936
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	937 def _execute_child(self, args, executable, preexec_fn, close_fds,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	938 cwd, env, universal_newlines,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	939 startupinfo, creationflags, shell,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	940 p2cread, p2cwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	941 c2pread, c2pwrite,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	942 errread, errwrite):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	943 """Execute program (POSIX version)"""
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	944
34624 5fde17b35472 Made the module compatible with Python 2.2 again. Peter Astrand <astrand@lysator.liu.se> parents: 34587 diff changeset	945 if isinstance(args, types.StringTypes):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	946 args = [args]
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	947
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	948 if shell:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	949 args = ["/bin/sh", "-c"] + args
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	950
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	951 if executable is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	952 executable = args[0]
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	953
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	954 # For transferring possible exec failure from child to parent
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	955 # The first char specifies the exception type: 0 means
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	956 # OSError, 1 means some other error.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	957 errpipe_read, errpipe_write = os.pipe()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	958 self._set_cloexec_flag(errpipe_write)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	959
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	960 self.pid = os.fork()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	961 if self.pid == 0:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	962 # Child
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	963 try:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	964 # Close parent's pipe ends
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	965 if p2cwrite:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	966 os.close(p2cwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	967 if c2pread:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	968 os.close(c2pread)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	969 if errread:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	970 os.close(errread)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	971 os.close(errpipe_read)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	972
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	973 # Dup fds for child
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	974 if p2cread:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	975 os.dup2(p2cread, 0)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	976 if c2pwrite:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	977 os.dup2(c2pwrite, 1)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	978 if errwrite:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	979 os.dup2(errwrite, 2)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	980
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	981 # Close pipe fds. Make sure we doesn't close the same
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	982 # fd more than once.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	983 if p2cread:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	984 os.close(p2cread)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	985 if c2pwrite and c2pwrite not in (p2cread,):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	986 os.close(c2pwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	987 if errwrite and errwrite not in (p2cread, c2pwrite):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	988 os.close(errwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	989
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	990 # Close all other fds, if asked for
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	991 if close_fds:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	992 self._close_fds(but=errpipe_write)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	993
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	994 if cwd is not None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	995 os.chdir(cwd)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	996
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	997 if preexec_fn:
37048 c048a09d06ff Remove apply() Neal Norwitz <nnorwitz@gmail.com> parents: 35633 diff changeset	998 preexec_fn()
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	999
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	1000 if env is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1001 os.execvp(executable, args)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1002 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1003 os.execvpe(executable, args, env)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1004
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1005 except:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1006 exc_type, exc_value, tb = sys.exc_info()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1007 # Save the traceback and attach it to the exception object
33735 1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	1008 exc_lines = traceback.format_exception(exc_type,
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	1009 exc_value,
1383c4692af7 Folded long lines. Tim Peters <tim.peters@gmail.com> parents: 33731 diff changeset	1010 tb)
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1011 exc_value.child_traceback = ''.join(exc_lines)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1012 os.write(errpipe_write, pickle.dumps(exc_value))
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1013
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1014 # This exitcode won't be reported to applications, so it
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1015 # really doesn't matter what we return.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1016 os._exit(255)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1017
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1018 # Parent
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1019 os.close(errpipe_write)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1020 if p2cread and p2cwrite:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1021 os.close(p2cread)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1022 if c2pwrite and c2pread:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1023 os.close(c2pwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1024 if errwrite and errread:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1025 os.close(errwrite)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1026
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1027 # Wait for exec to fail or succeed; possibly raising exception
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1028 data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1029 os.close(errpipe_read)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1030 if data != "":
34303 cb30cfcb39e7 On UNIX, when the execution of the child fails, we must waitpid() to Peter Astrand <astrand@lysator.liu.se> parents: 34302 diff changeset	1031 os.waitpid(self.pid, 0)
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1032 child_exception = pickle.loads(data)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1033 raise child_exception
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1034
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1035
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1036 def _handle_exitstatus(self, sts):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1037 if os.WIFSIGNALED(sts):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1038 self.returncode = -os.WTERMSIG(sts)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1039 elif os.WIFEXITED(sts):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1040 self.returncode = os.WEXITSTATUS(sts)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1041 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1042 # Should never happen
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1043 raise RuntimeError("Unknown child exit status!")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1044
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1045 _active.remove(self)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1046
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	1047
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1048 def poll(self):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1049 """Check if child process has terminated. Returns returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1050 attribute."""
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	1051 if self.returncode is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1052 try:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1053 pid, sts = os.waitpid(self.pid, os.WNOHANG)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1054 if pid == self.pid:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1055 self._handle_exitstatus(sts)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1056 except os.error:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1057 pass
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1058 return self.returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1059
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1060
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1061 def wait(self):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1062 """Wait for child process to terminate. Returns returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1063 attribute."""
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	1064 if self.returncode is None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1065 pid, sts = os.waitpid(self.pid, 0)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1066 self._handle_exitstatus(sts)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1067 return self.returncode
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1068
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1069
34672 085bc27f92b7 Optimization for communicate(): If only one of stdin/stdout/stderr is Peter Astrand <astrand@lysator.liu.se> parents: 34624 diff changeset	1070 def _communicate(self, input):
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1071 read_set = []
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1072 write_set = []
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1073 stdout = None # Return
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1074 stderr = None # Return
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1075
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1076 if self.stdin:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1077 # Flush stdio buffer. This might block, if the user has
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1078 # been writing to .stdin in an uncontrolled fashion.
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1079 self.stdin.flush()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1080 if input:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1081 write_set.append(self.stdin)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1082 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1083 self.stdin.close()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1084 if self.stdout:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1085 read_set.append(self.stdout)
33731 53c468d0955b Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 33727 diff changeset	1086 stdout = []
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1087 if self.stderr:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1088 read_set.append(self.stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1089 stderr = []
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1090
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1091 while read_set or write_set:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1092 rlist, wlist, xlist = select.select(read_set, write_set, [])
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1093
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1094 if self.stdin in wlist:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1095 # When select has indicated that the file is writable,
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1096 # we can write up to PIPE_BUF bytes without risk
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1097 # blocking. POSIX defines PIPE_BUF >= 512
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1098 bytes_written = os.write(self.stdin.fileno(), input[:512])
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1099 input = input[bytes_written:]
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1100 if not input:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1101 self.stdin.close()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1102 write_set.remove(self.stdin)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1103
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1104 if self.stdout in rlist:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1105 data = os.read(self.stdout.fileno(), 1024)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1106 if data == "":
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1107 self.stdout.close()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1108 read_set.remove(self.stdout)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1109 stdout.append(data)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1110
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1111 if self.stderr in rlist:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1112 data = os.read(self.stderr.fileno(), 1024)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1113 if data == "":
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1114 self.stderr.close()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1115 read_set.remove(self.stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1116 stderr.append(data)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1117
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1118 # All data exchanged. Translate lists into strings.
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	1119 if stdout is not None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1120 stdout = ''.join(stdout)
34575 4545a154fac1 Patch from Leandro Lucarella: replaced: Peter Astrand <astrand@lysator.liu.se> parents: 34551 diff changeset	1121 if stderr is not None:
33723 76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1122 stderr = ''.join(stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1123
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1124 # Translate newlines, if requested. We cannot let the file
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1125 # object do the translation: It is based on stdio, which is
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1126 # impossible to combine with select (unless forcing no
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1127 # buffering).
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1128 if self.universal_newlines and hasattr(open, 'newlines'):
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1129 if stdout:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1130 stdout = self._translate_newlines(stdout)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1131 if stderr:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1132 stderr = self._translate_newlines(stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1133
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1134 self.wait()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1135 return (stdout, stderr)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1136
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1137
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1138 def _demo_posix():
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1139 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1140 # Example 1: Simple redirection: Get process list
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1141 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1142 plist = Popen(["ps"], stdout=PIPE).communicate()[0]
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1143 print "Process list:"
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1144 print plist
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1145
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1146 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1147 # Example 2: Change uid before executing child
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1148 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1149 if os.getuid() == 0:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1150 p = Popen(["id"], preexec_fn=lambda: os.setuid(100))
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1151 p.wait()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1152
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1153 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1154 # Example 3: Connecting several subprocesses
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1155 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1156 print "Looking for 'hda'..."
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1157 p1 = Popen(["dmesg"], stdout=PIPE)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1158 p2 = Popen(["grep", "hda"], stdin=p1.stdout, stdout=PIPE)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1159 print repr(p2.communicate()[0])
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1160
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1161 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1162 # Example 4: Catch execution error
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1163 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1164 print
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1165 print "Trying a weird file..."
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1166 try:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1167 print Popen(["/this/path/does/not/exist"]).communicate()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1168 except OSError, e:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1169 if e.errno == errno.ENOENT:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1170 print "The file didn't exist. I thought so..."
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1171 print "Child traceback:"
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1172 print e.child_traceback
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1173 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1174 print "Error", e.errno
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1175 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1176 print >>sys.stderr, "Gosh. No error."
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1177
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1178
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1179 def _demo_windows():
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1180 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1181 # Example 1: Connecting several subprocesses
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1182 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1183 print "Looking for 'PROMPT' in set output..."
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1184 p1 = Popen("set", stdout=PIPE, shell=True)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1185 p2 = Popen('find "PROMPT"', stdin=p1.stdout, stdout=PIPE)
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1186 print repr(p2.communicate()[0])
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1187
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1188 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1189 # Example 2: Simple execution of program
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1190 #
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1191 print "Executing calc..."
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1192 p = Popen("calc")
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1193 p.wait()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1194
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1195
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1196 if __name__ == "__main__":
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1197 if mswindows:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1198 _demo_windows()
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1199 else:
76641824cf05 Added Peter Astrand's subprocess module. Fredrik Lundh <fredrik@pythonware.com> parents: diff changeset	1200 _demo_posix()

Mercurial > cpython-lru_cache-weakref

annotate Lib/subprocess.py @ 37850:ebe59cd18273