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

annotate Lib/rexec.py @ 25838:8540887bcec6 2.2

Backport of 2.183: Fix memory leak in add_subclass() found by NealN with valgrind.

author	Guido van Rossum <guido@python.org>
date	Fri, 18 Oct 2002 13:42:21 +0000
parents	fb00fd93188a
children	e96575f7e96a

rev	line source
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	1 """Restricted execution facilities.
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	2
3637 6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	3 The class RExec exports methods r_exec(), r_eval(), r_execfile(), and
6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	4 r_import(), which correspond roughly to the built-in operations
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	5 exec, eval(), execfile() and import, but executing the code in an
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	6 environment that only exposes those built-in operations that are
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	7 deemed safe. To this end, a modest collection of 'fake' modules is
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	8 created which mimics the standard modules by the same names. It is a
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	9 policy decision which built-in modules and operations are made
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	10 available; this module provides a reasonable default, but derived
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	11 classes can change the policies e.g. by overriding or extending class
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	12 variables like ok_builtin_modules or methods like make_sys().
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	13
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	14 XXX To do:
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	15 - r_open should allow writing tmp dir
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	16 - r_exec etc. with explicit globals/locals? (Use rexec("exec ... in ...")?)
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	17
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	18 """
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	19
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	20
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	21 import sys
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	22 import __builtin__
4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	23 import os
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	24 import ihooks
23604 ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	25 import imp
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	26
16613 f68dbffff927 bunch more __all__ lists Skip Montanaro <skip@pobox.com> parents: 15871 diff changeset	27 __all__ = ["RExec"]
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	28
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	29 class FileBase:
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	30
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	31 ok_file_methods = ('fileno', 'flush', 'isatty', 'read', 'readline',
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	32 'readlines', 'seek', 'tell', 'write', 'writelines')
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	33
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	34
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	35 class FileWrapper(FileBase):
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	36
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	37 # XXX This is just like a Bastion -- should use that!
3734 04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	38
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	39 def __init__(self, f):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	40 self.f = f
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	41 for m in self.ok_file_methods:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	42 if not hasattr(self, m) and hasattr(f, m):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	43 setattr(self, m, getattr(f, m))
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	44
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	45 def close(self):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	46 self.flush()
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	47
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	48
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	49 TEMPLATE = """
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	50 def %s(self, *args):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	51 return apply(getattr(self.mod, self.name).%s, args)
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	52 """
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	53
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	54 class FileDelegate(FileBase):
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	55
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	56 def __init__(self, mod, name):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	57 self.mod = mod
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	58 self.name = name
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	59
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	60 for m in FileBase.ok_file_methods + ('close',):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	61 exec TEMPLATE % (m, m)
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	62
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	63
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	64 class RHooks(ihooks.Hooks):
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	65
3637 6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	66 def __init__(self, *args):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	67 # Hacks to support both old and new interfaces:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	68 # old interface was RHooks(rexec[, verbose])
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	69 # new interface is RHooks([verbose])
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	70 verbose = 0
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	71 rexec = None
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	72 if args and type(args[-1]) == type(0):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	73 verbose = args[-1]
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	74 args = args[:-1]
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	75 if args and hasattr(args[0], '__class__'):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	76 rexec = args[0]
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	77 args = args[1:]
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	78 if args:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	79 raise TypeError, "too many arguments"
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	80 ihooks.Hooks.__init__(self, verbose)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	81 self.rexec = rexec
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	82
3637 6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	83 def set_rexec(self, rexec):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	84 # Called by RExec instance to complete initialization
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	85 self.rexec = rexec
3637 6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	86
23604 ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	87 def get_suffixes(self):
ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	88 return self.rexec.get_suffixes()
ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	89
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	90 def is_builtin(self, name):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	91 return self.rexec.is_builtin(name)
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	92
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	93 def init_builtin(self, name):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	94 m = __import__(name)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	95 return self.rexec.copy_except(m, ())
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	96
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	97 def init_frozen(self, name): raise SystemError, "don't use this"
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	98 def load_source(self, *args): raise SystemError, "don't use this"
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	99 def load_compiled(self, *args): raise SystemError, "don't use this"
8587 1581c931cb35 For completeness, add a dummy load_package() method to RHooks. It Guido van Rossum <guido@python.org> parents: 8479 diff changeset	100 def load_package(self, *args): raise SystemError, "don't use this"
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	101
3637 6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	102 def load_dynamic(self, name, filename, file):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	103 return self.rexec.load_dynamic(name, filename, file)
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	104
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	105 def add_module(self, name):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	106 return self.rexec.add_module(name)
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	107
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	108 def modules_dict(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	109 return self.rexec.modules
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	110
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	111 def default_path(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	112 return self.rexec.modules['sys'].path
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	113
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	114
9130 b0fa2fc12dfb Get rid of the classes RModuleLoader and RModuleImporter -- these were Guido van Rossum <guido@python.org> parents: 8655 diff changeset	115 # XXX Backwards compatibility
b0fa2fc12dfb Get rid of the classes RModuleLoader and RModuleImporter -- these were Guido van Rossum <guido@python.org> parents: 8655 diff changeset	116 RModuleLoader = ihooks.FancyModuleLoader
b0fa2fc12dfb Get rid of the classes RModuleLoader and RModuleImporter -- these were Guido van Rossum <guido@python.org> parents: 8655 diff changeset	117 RModuleImporter = ihooks.ModuleImporter
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	118
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	119
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	120 class RExec(ihooks._Verbose):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	121 """Basic restricted execution framework.
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	122
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	123 Code executed in this restricted environment will only have access to
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	124 modules and functions that are deemed safe; you can subclass RExec to
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	125 add or remove capabilities as desired.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	126
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	127 The RExec class can prevent code from performing unsafe operations like
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	128 reading or writing disk files, or using TCP/IP sockets. However, it does
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	129 not protect against code using extremely large amounts of memory or
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	130 processor time.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	131
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	132 """
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	133
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	134 ok_path = tuple(sys.path) # That's a policy decision
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	135
4334 f37cbfaa7328 1. Correct typo in FileWrapper.close() (fix by AMK). Guido van Rossum <guido@python.org> parents: 4075 diff changeset	136 ok_builtin_modules = ('audioop', 'array', 'binascii',
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	137 'cmath', 'errno', 'imageop',
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	138 'marshal', 'math', 'md5', 'operator',
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	139 'parser', 'regex', 'pcre', 'rotor', 'select',
18224 83c4748b9390 Add sha and _sre to the list of allowed built-in modules. Fred Drake <fdrake@acm.org> parents: 18142 diff changeset	140 'sha', '_sre', 'strop', 'struct', 'time')
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	141
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	142 ok_posix_names = ('error', 'fstat', 'listdir', 'lstat', 'readlink',
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	143 'stat', 'times', 'uname', 'getpid', 'getppid',
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	144 'getcwd', 'getuid', 'getgid', 'geteuid', 'getegid')
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	145
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	146 ok_sys_names = ('ps1', 'ps2', 'copyright', 'version',
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	147 'platform', 'exit', 'maxint')
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	148
19901 07818cbcd302 Now that file objects are subclassable, you can get at the file constructor Tim Peters <tim.peters@gmail.com> parents: 19231 diff changeset	149 nok_builtin_names = ('open', 'file', 'reload', '__import__')
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	150
23604 ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	151 ok_file_types = (imp.C_EXTENSION, imp.PY_SOURCE)
ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	152
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	153 def __init__(self, hooks = None, verbose = 0):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	154 """Returns an instance of the RExec class.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	155
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	156 The hooks parameter is an instance of the RHooks class or a subclass
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	157 of it. If it is omitted or None, the default RHooks class is
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	158 instantiated.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	159
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	160 Whenever the RExec module searches for a module (even a built-in one)
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	161 or reads a module's code, it doesn't actually go out to the file
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	162 system itself. Rather, it calls methods of an RHooks instance that
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	163 was passed to or created by its constructor. (Actually, the RExec
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	164 object doesn't make these calls --- they are made by a module loader
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	165 object that's part of the RExec object. This allows another level of
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	166 flexibility, which can be useful when changing the mechanics of
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	167 import within the restricted environment.)
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	168
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	169 By providing an alternate RHooks object, we can control the file
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	170 system accesses made to import a module, without changing the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	171 actual algorithm that controls the order in which those accesses are
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	172 made. For instance, we could substitute an RHooks object that
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	173 passes all filesystem requests to a file server elsewhere, via some
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	174 RPC mechanism such as ILU. Grail's applet loader uses this to support
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	175 importing applets from a URL for a directory.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	176
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	177 If the verbose parameter is true, additional debugging output may be
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	178 sent to standard output.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	179
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	180 """
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	181 ihooks._Verbose.__init__(self, verbose)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	182 # XXX There's a circular reference here:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	183 self.hooks = hooks or RHooks(verbose)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	184 self.hooks.set_rexec(self)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	185 self.modules = {}
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	186 self.ok_dynamic_modules = self.ok_builtin_modules
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	187 list = []
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	188 for mname in self.ok_builtin_modules:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	189 if mname in sys.builtin_module_names:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	190 list.append(mname)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	191 self.ok_builtin_modules = tuple(list)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	192 self.set_trusted_path()
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	193 self.make_builtin()
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	194 self.make_initial_modules()
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	195 # make_sys must be last because it adds the already created
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	196 # modules to its builtin_module_names
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	197 self.make_sys()
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	198 self.loader = RModuleLoader(self.hooks, verbose)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	199 self.importer = RModuleImporter(self.loader, verbose)
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	200
3637 6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	201 def set_trusted_path(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	202 # Set the path from which dynamic modules may be loaded.
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	203 # Those dynamic modules must also occur in ok_builtin_modules
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	204 self.trusted_path = filter(os.path.isabs, sys.path)
3637 6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	205
6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	206 def load_dynamic(self, name, filename, file):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	207 if name not in self.ok_dynamic_modules:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	208 raise ImportError, "untrusted dynamic module: %s" % name
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	209 if sys.modules.has_key(name):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	210 src = sys.modules[name]
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	211 else:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	212 src = imp.load_dynamic(name, filename, file)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	213 dst = self.copy_except(src, [])
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	214 return dst
3637 6c0086f9270c Fix some obsolete names comments. Guido van Rossum <guido@python.org> parents: 2965 diff changeset	215
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	216 def make_initial_modules(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	217 self.make_main()
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	218 self.make_osname()
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	219
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	220 # Helpers for RHooks
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	221
23604 ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	222 def get_suffixes(self):
ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	223 return [item # (suff, mode, type)
ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	224 for item in imp.get_suffixes()
ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	225 if item[2] in self.ok_file_types]
ef8d456067fd Backport to 2.2.x: Guido van Rossum <guido@python.org> parents: 23577 diff changeset	226
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	227 def is_builtin(self, mname):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	228 return mname in self.ok_builtin_modules
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	229
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	230 # The make_* methods create specific built-in modules
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	231
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	232 def make_builtin(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	233 m = self.copy_except(__builtin__, self.nok_builtin_names)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	234 m.__import__ = self.r_import
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	235 m.reload = self.r_reload
19901 07818cbcd302 Now that file objects are subclassable, you can get at the file constructor Tim Peters <tim.peters@gmail.com> parents: 19231 diff changeset	236 m.open = m.file = self.r_open
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	237
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	238 def make_main(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	239 m = self.add_module('__main__')
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	240
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	241 def make_osname(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	242 osname = os.name
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	243 src = __import__(osname)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	244 dst = self.copy_only(src, self.ok_posix_names)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	245 dst.environ = e = {}
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	246 for key, value in os.environ.items():
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	247 e[key] = value
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	248
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	249 def make_sys(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	250 m = self.copy_only(sys, self.ok_sys_names)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	251 m.modules = self.modules
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	252 m.argv = ['RESTRICTED']
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	253 m.path = map(None, self.ok_path)
8655 ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	254 m.exc_info = self.r_exc_info
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	255 m = self.modules['sys']
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	256 l = self.modules.keys() + list(self.ok_builtin_modules)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	257 l.sort()
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	258 m.builtin_module_names = tuple(l)
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	259
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	260 # The copy_* methods copy existing modules with some changes
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	261
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	262 def copy_except(self, src, exceptions):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	263 dst = self.copy_none(src)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	264 for name in dir(src):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	265 setattr(dst, name, getattr(src, name))
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	266 for name in exceptions:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	267 try:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	268 delattr(dst, name)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	269 except AttributeError:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	270 pass
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	271 return dst
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	272
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	273 def copy_only(self, src, names):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	274 dst = self.copy_none(src)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	275 for name in names:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	276 try:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	277 value = getattr(src, name)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	278 except AttributeError:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	279 continue
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	280 setattr(dst, name, value)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	281 return dst
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	282
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	283 def copy_none(self, src):
8479 e281d5036725 Add the __doc__ string from the original module on copy_none(). Guido van Rossum <guido@python.org> parents: 7756 diff changeset	284 m = self.add_module(src.__name__)
e281d5036725 Add the __doc__ string from the original module on copy_none(). Guido van Rossum <guido@python.org> parents: 7756 diff changeset	285 m.__doc__ = src.__doc__
e281d5036725 Add the __doc__ string from the original module on copy_none(). Guido van Rossum <guido@python.org> parents: 7756 diff changeset	286 return m
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	287
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	288 # Add a module -- return an existing module or create one
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	289
21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	290 def add_module(self, mname):
25274 fb00fd93188a Backport (the relevant part of) rexec.py 1.41. Guido van Rossum <guido@python.org> parents: 23604 diff changeset	291 m = self.modules.get(mname)
fb00fd93188a Backport (the relevant part of) rexec.py 1.41. Guido van Rossum <guido@python.org> parents: 23604 diff changeset	292 if m is None:
fb00fd93188a Backport (the relevant part of) rexec.py 1.41. Guido van Rossum <guido@python.org> parents: 23604 diff changeset	293 self.modules[mname] = m = self.hooks.new_module(mname)
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	294 m.__builtins__ = self.modules['__builtin__']
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	295 return m
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	296
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	297 # The r* methods are public interfaces
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	298
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	299 def r_exec(self, code):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	300 """Execute code within a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	301
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	302 The code parameter must either be a string containing one or more
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	303 lines of Python code, or a compiled code object, which will be
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	304 executed in the restricted environment's __main__ module.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	305
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	306 """
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	307 m = self.add_module('__main__')
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	308 exec code in m.__dict__
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	309
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	310 def r_eval(self, code):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	311 """Evaluate code within a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	312
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	313 The code parameter must either be a string containing a Python
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	314 expression, or a compiled code object, which will be evaluated in
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	315 the restricted environment's __main__ module. The value of the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	316 expression or code object will be returned.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	317
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	318 """
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	319 m = self.add_module('__main__')
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	320 return eval(code, m.__dict__)
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	321
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	322 def r_execfile(self, file):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	323 """Execute the Python code in the file in the restricted
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	324 environment's __main__ module.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	325
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	326 """
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	327 m = self.add_module('__main__')
20419 4f3d1240830e Ignore execfile() return value; reported by Neal Norwitz. Fred Drake <fdrake@acm.org> parents: 19901 diff changeset	328 execfile(file, m.__dict__)
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	329
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	330 def r_import(self, mname, globals={}, locals={}, fromlist=[]):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	331 """Import a module, raising an ImportError exception if the module
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	332 is considered unsafe.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	333
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	334 This method is implicitly called by code executing in the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	335 restricted environment. Overriding this method in a subclass is
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	336 used to change the policies enforced by a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	337
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	338 """
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	339 return self.importer.import_module(mname, globals, locals, fromlist)
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	340
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	341 def r_reload(self, m):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	342 """Reload the module object, re-parsing and re-initializing it.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	343
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	344 This method is implicitly called by code executing in the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	345 restricted environment. Overriding this method in a subclass is
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	346 used to change the policies enforced by a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	347
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	348 """
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	349 return self.importer.reload(m)
2934 cb5ccbba1856 add module binascii; add r_unload/s_unload; don't change 'rb' to 'r' in open Guido van Rossum <guido@python.org> parents: 2926 diff changeset	350
cb5ccbba1856 add module binascii; add r_unload/s_unload; don't change 'rb' to 'r' in open Guido van Rossum <guido@python.org> parents: 2926 diff changeset	351 def r_unload(self, m):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	352 """Unload the module.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	353
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	354 Removes it from the restricted environment's sys.modules dictionary.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	355
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	356 This method is implicitly called by code executing in the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	357 restricted environment. Overriding this method in a subclass is
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	358 used to change the policies enforced by a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	359
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	360 """
2934 cb5ccbba1856 add module binascii; add r_unload/s_unload; don't change 'rb' to 'r' in open Guido van Rossum <guido@python.org> parents: 2926 diff changeset	361 return self.importer.unload(m)
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	362
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	363 # The s_* methods are similar but also swap std{in,out,err}
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	364
3734 04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	365 def make_delegate_files(self):
04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	366 s = self.modules['sys']
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	367 self.delegate_stdin = FileDelegate(s, 'stdin')
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	368 self.delegate_stdout = FileDelegate(s, 'stdout')
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	369 self.delegate_stderr = FileDelegate(s, 'stderr')
3734 04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	370 self.restricted_stdin = FileWrapper(sys.stdin)
04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	371 self.restricted_stdout = FileWrapper(sys.stdout)
04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	372 self.restricted_stderr = FileWrapper(sys.stderr)
04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	373
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	374 def set_files(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	375 if not hasattr(self, 'save_stdin'):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	376 self.save_files()
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	377 if not hasattr(self, 'delegate_stdin'):
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	378 self.make_delegate_files()
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	379 s = self.modules['sys']
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	380 s.stdin = self.restricted_stdin
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	381 s.stdout = self.restricted_stdout
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	382 s.stderr = self.restricted_stderr
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	383 sys.stdin = self.delegate_stdin
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	384 sys.stdout = self.delegate_stdout
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	385 sys.stderr = self.delegate_stderr
3734 04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	386
04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	387 def reset_files(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	388 self.restore_files()
3734 04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	389 s = self.modules['sys']
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	390 self.restricted_stdin = s.stdin
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	391 self.restricted_stdout = s.stdout
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	392 self.restricted_stderr = s.stderr
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	393
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	394
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	395 def save_files(self):
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	396 self.save_stdin = sys.stdin
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	397 self.save_stdout = sys.stdout
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	398 self.save_stderr = sys.stderr
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	399
3734 04c07538cac4 Fixed restore_files(); added reset_files(); made these more flexible. Guido van Rossum <guido@python.org> parents: 3648 diff changeset	400 def restore_files(self):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	401 sys.stdin = self.save_stdin
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	402 sys.stdout = self.save_stdout
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	403 sys.stderr = self.save_stderr
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	404
4334 f37cbfaa7328 1. Correct typo in FileWrapper.close() (fix by AMK). Guido van Rossum <guido@python.org> parents: 4075 diff changeset	405 def s_apply(self, func, args=(), kw=None):
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	406 self.save_files()
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	407 try:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	408 self.set_files()
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	409 if kw:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	410 r = apply(func, args, kw)
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	411 else:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	412 r = apply(func, args)
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	413 finally:
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	414 self.restore_files()
18142 47c9d0cb6e31 Fix SF bug #433904 (Alex Martelli) - all s_* methods return None only. Guido van Rossum <guido@python.org> parents: 16613 diff changeset	415 return r
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	416
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	417 def s_exec(self, *args):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	418 """Execute code within a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	419
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	420 Similar to the r_exec() method, but the code will be granted access
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	421 to restricted versions of the standard I/O streams sys.stdin,
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	422 sys.stderr, and sys.stdout.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	423
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	424 The code parameter must either be a string containing one or more
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	425 lines of Python code, or a compiled code object, which will be
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	426 executed in the restricted environment's __main__ module.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	427
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	428 """
18142 47c9d0cb6e31 Fix SF bug #433904 (Alex Martelli) - all s_* methods return None only. Guido van Rossum <guido@python.org> parents: 16613 diff changeset	429 return self.s_apply(self.r_exec, args)
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	430
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	431 def s_eval(self, *args):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	432 """Evaluate code within a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	433
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	434 Similar to the r_eval() method, but the code will be granted access
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	435 to restricted versions of the standard I/O streams sys.stdin,
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	436 sys.stderr, and sys.stdout.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	437
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	438 The code parameter must either be a string containing a Python
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	439 expression, or a compiled code object, which will be evaluated in
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	440 the restricted environment's __main__ module. The value of the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	441 expression or code object will be returned.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	442
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	443 """
18142 47c9d0cb6e31 Fix SF bug #433904 (Alex Martelli) - all s_* methods return None only. Guido van Rossum <guido@python.org> parents: 16613 diff changeset	444 return self.s_apply(self.r_eval, args)
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	445
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	446 def s_execfile(self, *args):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	447 """Execute the Python code in the file in the restricted
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	448 environment's __main__ module.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	449
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	450 Similar to the r_execfile() method, but the code will be granted
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	451 access to restricted versions of the standard I/O streams sys.stdin,
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	452 sys.stderr, and sys.stdout.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	453
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	454 """
18142 47c9d0cb6e31 Fix SF bug #433904 (Alex Martelli) - all s_* methods return None only. Guido van Rossum <guido@python.org> parents: 16613 diff changeset	455 return self.s_apply(self.r_execfile, args)
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	456
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	457 def s_import(self, *args):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	458 """Import a module, raising an ImportError exception if the module
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	459 is considered unsafe.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	460
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	461 This method is implicitly called by code executing in the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	462 restricted environment. Overriding this method in a subclass is
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	463 used to change the policies enforced by a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	464
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	465 Similar to the r_import() method, but has access to restricted
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	466 versions of the standard I/O streams sys.stdin, sys.stderr, and
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	467 sys.stdout.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	468
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	469 """
18142 47c9d0cb6e31 Fix SF bug #433904 (Alex Martelli) - all s_* methods return None only. Guido van Rossum <guido@python.org> parents: 16613 diff changeset	470 return self.s_apply(self.r_import, args)
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	471
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	472 def s_reload(self, *args):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	473 """Reload the module object, re-parsing and re-initializing it.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	474
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	475 This method is implicitly called by code executing in the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	476 restricted environment. Overriding this method in a subclass is
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	477 used to change the policies enforced by a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	478
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	479 Similar to the r_reload() method, but has access to restricted
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	480 versions of the standard I/O streams sys.stdin, sys.stderr, and
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	481 sys.stdout.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	482
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	483 """
18142 47c9d0cb6e31 Fix SF bug #433904 (Alex Martelli) - all s_* methods return None only. Guido van Rossum <guido@python.org> parents: 16613 diff changeset	484 return self.s_apply(self.r_reload, args)
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	485
2934 cb5ccbba1856 add module binascii; add r_unload/s_unload; don't change 'rb' to 'r' in open Guido van Rossum <guido@python.org> parents: 2926 diff changeset	486 def s_unload(self, *args):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	487 """Unload the module.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	488
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	489 Removes it from the restricted environment's sys.modules dictionary.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	490
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	491 This method is implicitly called by code executing in the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	492 restricted environment. Overriding this method in a subclass is
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	493 used to change the policies enforced by a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	494
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	495 Similar to the r_unload() method, but has access to restricted
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	496 versions of the standard I/O streams sys.stdin, sys.stderr, and
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	497 sys.stdout.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	498
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	499 """
18142 47c9d0cb6e31 Fix SF bug #433904 (Alex Martelli) - all s_* methods return None only. Guido van Rossum <guido@python.org> parents: 16613 diff changeset	500 return self.s_apply(self.r_unload, args)
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	501
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	502 # Restricted open(...)
15871 62aeefa01fdd Whitespace normalization. Tim Peters <tim.peters@gmail.com> parents: 15039 diff changeset	503
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	504 def r_open(self, file, mode='r', buf=-1):
23577 8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	505 """Method called when open() is called in the restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	506
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	507 The arguments are identical to those of the open() function, and a
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	508 file object (or a class instance compatible with file objects)
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	509 should be returned. RExec's default behaviour is allow opening
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	510 any file for reading, but forbidding any attempt to write a file.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	511
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	512 This method is implicitly called by code executing in the
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	513 restricted environment. Overriding this method in a subclass is
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	514 used to change the policies enforced by a restricted environment.
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	515
8f7b79cda0d3 Backport change to 1.35 adding doc strings Raymond Hettinger <python@rcn.com> parents: 20419 diff changeset	516 """
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	517 if mode not in ('r', 'rb'):
4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	518 raise IOError, "can't open files for writing in restricted mode"
2934 cb5ccbba1856 add module binascii; add r_unload/s_unload; don't change 'rb' to 'r' in open Guido van Rossum <guido@python.org> parents: 2926 diff changeset	519 return open(file, mode, buf)
2926 4a53483939c1 added sys.std files, read-only open, reload Guido van Rossum <guido@python.org> parents: 2886 diff changeset	520
8655 ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	521 # Restricted version of sys.exc_info()
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	522
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	523 def r_exc_info(self):
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	524 ty, va, tr = sys.exc_info()
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	525 tr = None
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	526 return ty, va, tr
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	527
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	528
4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	529 def test():
19231 e29ba8f1e7f8 Remove redundant import (PyChecker). Guido van Rossum <guido@python.org> parents: 19045 diff changeset	530 import getopt, traceback
8655 ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	531 opts, args = getopt.getopt(sys.argv[1:], 'vt:')
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	532 verbose = 0
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	533 trusted = []
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	534 for o, a in opts:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	535 if o == '-v':
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	536 verbose = verbose+1
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	537 if o == '-t':
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	538 trusted.append(a)
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	539 r = RExec(verbose=verbose)
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	540 if trusted:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	541 r.ok_builtin_modules = r.ok_builtin_modules + tuple(trusted)
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	542 if args:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	543 r.modules['sys'].argv = args
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	544 r.modules['sys'].path.insert(0, os.path.dirname(args[0]))
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	545 else:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	546 r.modules['sys'].path.insert(0, "")
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	547 fp = sys.stdin
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	548 if args and args[0] != '-':
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	549 try:
8655 ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	550 fp = open(args[0])
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	551 except IOError, msg:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	552 print "%s: can't open file %s" % (sys.argv[0], `args[0]`)
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	553 return 1
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	554 if fp.isatty():
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	555 print "* RESTRICTED * Python", sys.version
19231 e29ba8f1e7f8 Remove redundant import (PyChecker). Guido van Rossum <guido@python.org> parents: 19045 diff changeset	556 print 'Type "help", "copyright", "credits" or "license" ' \
e29ba8f1e7f8 Remove redundant import (PyChecker). Guido van Rossum <guido@python.org> parents: 19045 diff changeset	557 'for more information.'
e29ba8f1e7f8 Remove redundant import (PyChecker). Guido van Rossum <guido@python.org> parents: 19045 diff changeset	558
8655 ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	559 while 1:
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	560 try:
8655 ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	561 try:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	562 s = raw_input('>>> ')
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	563 except EOFError:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	564 print
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	565 break
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	566 if s and s[0] != '#':
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	567 s = s + '\n'
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	568 c = compile(s, '<stdin>', 'single')
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	569 r.s_exec(c)
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	570 except SystemExit, n:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	571 return n
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	572 except:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	573 traceback.print_exc()
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	574 else:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	575 text = fp.read()
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	576 fp.close()
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	577 c = compile(text, fp.name, 'exec')
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	578 try:
ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	579 r.s_exec(c)
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	580 except SystemExit, n:
8655 ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	581 return n
7756 a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	582 except:
a419334f3b39 A few lines were indented using tabs instead of spaces -- fix them. Guido van Rossum <guido@python.org> parents: 6518 diff changeset	583 traceback.print_exc()
8655 ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	584 return 1
2886 21e105460a49 new package support, import hooks, restricted execution support Guido van Rossum <guido@python.org> parents: 2776 diff changeset	585
2135 4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	586
4f90b474beec new files Guido van Rossum <guido@python.org> parents: diff changeset	587 if __name__ == '__main__':
8655 ed0a38cbc3e6 (1) Added a sys.exc_info() emulation. (It returns None for the traceback.) Guido van Rossum <guido@python.org> parents: 8587 diff changeset	588 sys.exit(test())

Mercurial > cpython-lru_cache-weakref

annotate Lib/rexec.py @ 25838:8540887bcec6 2.2