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annotate Lib/ctypes/util.py @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents be41abd74949
children d76fb24d79c3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 ######################################################################
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2 # This file should be kept compatible with Python 2.3, see PEP 291. #
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3 ######################################################################
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4 import sys, os
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5
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6 # find_library(name) returns the pathname of a library, or None.
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7 if os.name == "nt":
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8
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9 def _get_build_version():
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10 """Return the version of MSVC that was used to build Python.
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11
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12 For Python 2.3 and up, the version number is included in
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13 sys.version. For earlier versions, assume the compiler is MSVC 6.
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14 """
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15 # This function was copied from Lib/distutils/msvccompiler.py
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16 prefix = "MSC v."
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17 i = sys.version.find(prefix)
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18 if i == -1:
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19 return 6
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20 i = i + len(prefix)
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21 s, rest = sys.version[i:].split(" ", 1)
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22 majorVersion = int(s[:-2]) - 6
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23 minorVersion = int(s[2:3]) / 10.0
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24 # I don't think paths are affected by minor version in version 6
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25 if majorVersion == 6:
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26 minorVersion = 0
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27 if majorVersion >= 6:
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28 return majorVersion + minorVersion
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29 # else we don't know what version of the compiler this is
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30 return None
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31
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32 def find_msvcrt():
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33 """Return the name of the VC runtime dll"""
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34 version = _get_build_version()
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35 if version is None:
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36 # better be safe than sorry
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37 return None
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38 if version <= 6:
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39 clibname = 'msvcrt'
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40 else:
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41 clibname = 'msvcr%d' % (version * 10)
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42
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43 # If python was built with in debug mode
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44 import imp
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45 if imp.get_suffixes()[0][0] == '_d.pyd':
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46 clibname += 'd'
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47 return clibname+'.dll'
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48
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49 def find_library(name):
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50 if name in ('c', 'm'):
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51 return find_msvcrt()
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52 # See MSDN for the REAL search order.
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53 for directory in os.environ['PATH'].split(os.pathsep):
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54 fname = os.path.join(directory, name)
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55 if os.path.isfile(fname):
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56 return fname
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57 if fname.lower().endswith(".dll"):
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58 continue
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59 fname = fname + ".dll"
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60 if os.path.isfile(fname):
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61 return fname
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62 return None
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63
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64 if os.name == "ce":
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65 # search path according to MSDN:
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66 # - absolute path specified by filename
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67 # - The .exe launch directory
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68 # - the Windows directory
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69 # - ROM dll files (where are they?)
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70 # - OEM specified search path: HKLM\Loader\SystemPath
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71 def find_library(name):
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72 return name
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73
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74 if os.name == "posix" and sys.platform == "darwin":
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75 from ctypes.macholib.dyld import dyld_find as _dyld_find
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76 def find_library(name):
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77 possible = ['lib%s.dylib' % name,
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78 '%s.dylib' % name,
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79 '%s.framework/%s' % (name, name)]
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80 for name in possible:
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81 try:
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82 return _dyld_find(name)
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83 except ValueError:
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84 continue
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85 return None
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86
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87 elif os.name == "posix":
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88 # Andreas Degert's find functions, using gcc, /sbin/ldconfig, objdump
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89 import re, tempfile, errno
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90
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91 def _findLib_gcc(name):
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92 expr = r'[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name)
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93 fdout, ccout = tempfile.mkstemp()
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94 os.close(fdout)
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95 cmd = 'if type gcc >/dev/null 2>&1; then CC=gcc; elif type cc >/dev/null 2>&1; then CC=cc;else exit 10; fi;' \
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96 '$CC -Wl,-t -o ' + ccout + ' 2>&1 -l' + name
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97 try:
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98 f = os.popen(cmd)
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99 try:
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100 trace = f.read()
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101 finally:
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102 rv = f.close()
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103 finally:
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104 try:
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105 os.unlink(ccout)
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106 except OSError, e:
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107 if e.errno != errno.ENOENT:
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108 raise
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109 if rv == 10:
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110 raise OSError, 'gcc or cc command not found'
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111 res = re.search(expr, trace)
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112 if not res:
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113 return None
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114 return res.group(0)
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115
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116
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117 if sys.platform == "sunos5":
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118 # use /usr/ccs/bin/dump on solaris
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119 def _get_soname(f):
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120 if not f:
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121 return None
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122 cmd = "/usr/ccs/bin/dump -Lpv 2>/dev/null " + f
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123 f = os.popen(cmd)
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124 try:
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125 data = f.read()
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126 finally:
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127 f.close()
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128 res = re.search(r'\[.*\]\sSONAME\s+([^\s]+)', data)
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129 if not res:
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130 return None
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131 return res.group(1)
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132 else:
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133 def _get_soname(f):
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134 # assuming GNU binutils / ELF
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135 if not f:
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136 return None
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137 cmd = 'if ! type objdump >/dev/null 2>&1; then exit 10; fi;' \
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138 "objdump -p -j .dynamic 2>/dev/null " + f
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139 f = os.popen(cmd)
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140 dump = f.read()
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141 rv = f.close()
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142 if rv == 10:
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143 raise OSError, 'objdump command not found'
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144 f = os.popen(cmd)
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145 try:
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146 data = f.read()
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147 finally:
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148 f.close()
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149 res = re.search(r'\sSONAME\s+([^\s]+)', data)
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150 if not res:
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151 return None
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152 return res.group(1)
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153
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154 if (sys.platform.startswith("freebsd")
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155 or sys.platform.startswith("openbsd")
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156 or sys.platform.startswith("dragonfly")):
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157
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158 def _num_version(libname):
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159 # "libxyz.so.MAJOR.MINOR" => [ MAJOR, MINOR ]
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160 parts = libname.split(".")
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161 nums = []
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162 try:
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163 while parts:
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164 nums.insert(0, int(parts.pop()))
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165 except ValueError:
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166 pass
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167 return nums or [ sys.maxint ]
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168
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169 def find_library(name):
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170 ename = re.escape(name)
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171 expr = r':-l%s\.\S+ => \S*/(lib%s\.\S+)' % (ename, ename)
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172 f = os.popen('/sbin/ldconfig -r 2>/dev/null')
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173 try:
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174 data = f.read()
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175 finally:
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176 f.close()
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177 res = re.findall(expr, data)
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178 if not res:
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179 return _get_soname(_findLib_gcc(name))
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180 res.sort(cmp= lambda x,y: cmp(_num_version(x), _num_version(y)))
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181 return res[-1]
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182
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183 else:
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184
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185 def _findSoname_ldconfig(name):
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186 import struct
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187 if struct.calcsize('l') == 4:
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188 machine = os.uname()[4] + '-32'
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189 else:
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190 machine = os.uname()[4] + '-64'
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191 mach_map = {
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192 'x86_64-64': 'libc6,x86-64',
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193 'ppc64-64': 'libc6,64bit',
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194 'sparc64-64': 'libc6,64bit',
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195 's390x-64': 'libc6,64bit',
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196 'ia64-64': 'libc6,IA-64',
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197 }
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198 abi_type = mach_map.get(machine, 'libc6')
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199
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200 # XXX assuming GLIBC's ldconfig (with option -p)
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201 expr = r'\s+(lib%s\.[^\s]+)\s+\(%s' % (re.escape(name), abi_type)
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202 f = os.popen('/sbin/ldconfig -p 2>/dev/null')
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203 try:
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204 data = f.read()
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205 finally:
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206 f.close()
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207 res = re.search(expr, data)
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208 if not res:
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209 return None
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210 return res.group(1)
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211
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212 def find_library(name):
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213 return _findSoname_ldconfig(name) or _get_soname(_findLib_gcc(name))
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214
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215 ################################################################
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216 # test code
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217
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218 def test():
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219 from ctypes import cdll
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220 if os.name == "nt":
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221 print cdll.msvcrt
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222 print cdll.load("msvcrt")
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223 print find_library("msvcrt")
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224
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225 if os.name == "posix":
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226 # find and load_version
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227 print find_library("m")
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228 print find_library("c")
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229 print find_library("bz2")
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230
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231 # getattr
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232 ## print cdll.m
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233 ## print cdll.bz2
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234
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235 # load
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236 if sys.platform == "darwin":
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237 print cdll.LoadLibrary("libm.dylib")
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238 print cdll.LoadLibrary("libcrypto.dylib")
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239 print cdll.LoadLibrary("libSystem.dylib")
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240 print cdll.LoadLibrary("System.framework/System")
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241 else:
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242 print cdll.LoadLibrary("libm.so")
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243 print cdll.LoadLibrary("libcrypt.so")
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244 print find_library("crypt")
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245
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246 if __name__ == "__main__":
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247 test()