annotate venv/lib/python2.7/os.py @ 0:d67268158946 draft

planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 r"""OS routines for NT or Posix depending on what system we're on.
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2
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3 This exports:
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4 - all functions from posix, nt, os2, or ce, e.g. unlink, stat, etc.
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5 - os.path is one of the modules posixpath, or ntpath
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6 - os.name is 'posix', 'nt', 'os2', 'ce' or 'riscos'
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7 - os.curdir is a string representing the current directory ('.' or ':')
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8 - os.pardir is a string representing the parent directory ('..' or '::')
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9 - os.sep is the (or a most common) pathname separator ('/' or ':' or '\\')
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10 - os.extsep is the extension separator ('.' or '/')
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11 - os.altsep is the alternate pathname separator (None or '/')
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12 - os.pathsep is the component separator used in $PATH etc
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13 - os.linesep is the line separator in text files ('\r' or '\n' or '\r\n')
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14 - os.defpath is the default search path for executables
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15 - os.devnull is the file path of the null device ('/dev/null', etc.)
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16
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17 Programs that import and use 'os' stand a better chance of being
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18 portable between different platforms. Of course, they must then
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19 only use functions that are defined by all platforms (e.g., unlink
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20 and opendir), and leave all pathname manipulation to os.path
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21 (e.g., split and join).
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22 """
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23
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24 #'
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25
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26 import sys, errno
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27
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28 _names = sys.builtin_module_names
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29
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30 # Note: more names are added to __all__ later.
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31 __all__ = ["altsep", "curdir", "pardir", "sep", "extsep", "pathsep", "linesep",
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32 "defpath", "name", "path", "devnull",
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33 "SEEK_SET", "SEEK_CUR", "SEEK_END"]
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34
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35 def _get_exports_list(module):
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36 try:
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37 return list(module.__all__)
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38 except AttributeError:
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39 return [n for n in dir(module) if n[0] != '_']
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40
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41 if 'posix' in _names:
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42 name = 'posix'
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43 linesep = '\n'
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44 from posix import *
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45 try:
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46 from posix import _exit
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47 except ImportError:
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48 pass
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49 import posixpath as path
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50
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51 import posix
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52 __all__.extend(_get_exports_list(posix))
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53 del posix
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54
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55 elif 'nt' in _names:
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56 name = 'nt'
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57 linesep = '\r\n'
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58 from nt import *
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59 try:
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60 from nt import _exit
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61 except ImportError:
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62 pass
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63 import ntpath as path
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64
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65 import nt
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66 __all__.extend(_get_exports_list(nt))
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67 del nt
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68
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69 elif 'os2' in _names:
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70 name = 'os2'
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71 linesep = '\r\n'
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72 from os2 import *
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73 try:
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74 from os2 import _exit
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75 except ImportError:
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76 pass
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77 if sys.version.find('EMX GCC') == -1:
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78 import ntpath as path
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79 else:
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80 import os2emxpath as path
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81 from _emx_link import link
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82
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83 import os2
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84 __all__.extend(_get_exports_list(os2))
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85 del os2
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86
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87 elif 'ce' in _names:
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88 name = 'ce'
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89 linesep = '\r\n'
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90 from ce import *
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91 try:
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92 from ce import _exit
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93 except ImportError:
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94 pass
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95 # We can use the standard Windows path.
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96 import ntpath as path
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97
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98 import ce
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99 __all__.extend(_get_exports_list(ce))
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100 del ce
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101
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102 elif 'riscos' in _names:
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103 name = 'riscos'
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104 linesep = '\n'
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105 from riscos import *
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106 try:
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107 from riscos import _exit
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108 except ImportError:
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109 pass
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110 import riscospath as path
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111
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112 import riscos
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113 __all__.extend(_get_exports_list(riscos))
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114 del riscos
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115
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116 else:
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117 raise ImportError, 'no os specific module found'
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118
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119 sys.modules['os.path'] = path
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120 from os.path import (curdir, pardir, sep, pathsep, defpath, extsep, altsep,
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121 devnull)
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122
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123 del _names
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124
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125 # Python uses fixed values for the SEEK_ constants; they are mapped
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126 # to native constants if necessary in posixmodule.c
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127 SEEK_SET = 0
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128 SEEK_CUR = 1
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129 SEEK_END = 2
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130
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131 #'
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132
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133 # Super directory utilities.
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134 # (Inspired by Eric Raymond; the doc strings are mostly his)
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135
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136 def makedirs(name, mode=0777):
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137 """makedirs(path [, mode=0777])
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138
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139 Super-mkdir; create a leaf directory and all intermediate ones.
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140 Works like mkdir, except that any intermediate path segment (not
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141 just the rightmost) will be created if it does not exist. This is
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142 recursive.
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143
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144 """
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145 head, tail = path.split(name)
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146 if not tail:
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147 head, tail = path.split(head)
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148 if head and tail and not path.exists(head):
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149 try:
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150 makedirs(head, mode)
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151 except OSError, e:
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152 # be happy if someone already created the path
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153 if e.errno != errno.EEXIST:
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154 raise
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155 if tail == curdir: # xxx/newdir/. exists if xxx/newdir exists
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156 return
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157 mkdir(name, mode)
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158
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159 def removedirs(name):
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160 """removedirs(path)
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161
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162 Super-rmdir; remove a leaf directory and all empty intermediate
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163 ones. Works like rmdir except that, if the leaf directory is
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164 successfully removed, directories corresponding to rightmost path
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165 segments will be pruned away until either the whole path is
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166 consumed or an error occurs. Errors during this latter phase are
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167 ignored -- they generally mean that a directory was not empty.
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168
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169 """
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170 rmdir(name)
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171 head, tail = path.split(name)
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172 if not tail:
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173 head, tail = path.split(head)
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174 while head and tail:
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175 try:
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176 rmdir(head)
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177 except error:
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178 break
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179 head, tail = path.split(head)
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180
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181 def renames(old, new):
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182 """renames(old, new)
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183
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184 Super-rename; create directories as necessary and delete any left
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185 empty. Works like rename, except creation of any intermediate
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186 directories needed to make the new pathname good is attempted
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187 first. After the rename, directories corresponding to rightmost
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188 path segments of the old name will be pruned until either the
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189 whole path is consumed or a nonempty directory is found.
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190
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191 Note: this function can fail with the new directory structure made
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192 if you lack permissions needed to unlink the leaf directory or
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193 file.
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194
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195 """
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196 head, tail = path.split(new)
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197 if head and tail and not path.exists(head):
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198 makedirs(head)
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199 rename(old, new)
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200 head, tail = path.split(old)
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201 if head and tail:
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202 try:
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203 removedirs(head)
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204 except error:
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205 pass
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206
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207 __all__.extend(["makedirs", "removedirs", "renames"])
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208
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209 def walk(top, topdown=True, onerror=None, followlinks=False):
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210 """Directory tree generator.
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211
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212 For each directory in the directory tree rooted at top (including top
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213 itself, but excluding '.' and '..'), yields a 3-tuple
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214
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215 dirpath, dirnames, filenames
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216
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217 dirpath is a string, the path to the directory. dirnames is a list of
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218 the names of the subdirectories in dirpath (excluding '.' and '..').
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219 filenames is a list of the names of the non-directory files in dirpath.
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220 Note that the names in the lists are just names, with no path components.
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221 To get a full path (which begins with top) to a file or directory in
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222 dirpath, do os.path.join(dirpath, name).
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223
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224 If optional arg 'topdown' is true or not specified, the triple for a
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225 directory is generated before the triples for any of its subdirectories
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226 (directories are generated top down). If topdown is false, the triple
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227 for a directory is generated after the triples for all of its
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228 subdirectories (directories are generated bottom up).
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229
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230 When topdown is true, the caller can modify the dirnames list in-place
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231 (e.g., via del or slice assignment), and walk will only recurse into the
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232 subdirectories whose names remain in dirnames; this can be used to prune the
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233 search, or to impose a specific order of visiting. Modifying dirnames when
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234 topdown is false is ineffective, since the directories in dirnames have
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235 already been generated by the time dirnames itself is generated. No matter
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236 the value of topdown, the list of subdirectories is retrieved before the
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237 tuples for the directory and its subdirectories are generated.
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238
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239 By default errors from the os.listdir() call are ignored. If
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240 optional arg 'onerror' is specified, it should be a function; it
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241 will be called with one argument, an os.error instance. It can
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242 report the error to continue with the walk, or raise the exception
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243 to abort the walk. Note that the filename is available as the
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244 filename attribute of the exception object.
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245
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246 By default, os.walk does not follow symbolic links to subdirectories on
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247 systems that support them. In order to get this functionality, set the
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248 optional argument 'followlinks' to true.
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249
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250 Caution: if you pass a relative pathname for top, don't change the
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251 current working directory between resumptions of walk. walk never
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252 changes the current directory, and assumes that the client doesn't
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253 either.
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254
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255 Example:
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256
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257 import os
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258 from os.path import join, getsize
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259 for root, dirs, files in os.walk('python/Lib/email'):
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260 print root, "consumes",
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261 print sum([getsize(join(root, name)) for name in files]),
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262 print "bytes in", len(files), "non-directory files"
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263 if 'CVS' in dirs:
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264 dirs.remove('CVS') # don't visit CVS directories
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265
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266 """
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267
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268 islink, join, isdir = path.islink, path.join, path.isdir
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269
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270 # We may not have read permission for top, in which case we can't
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271 # get a list of the files the directory contains. os.path.walk
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272 # always suppressed the exception then, rather than blow up for a
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273 # minor reason when (say) a thousand readable directories are still
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274 # left to visit. That logic is copied here.
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275 try:
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276 # Note that listdir and error are globals in this module due
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277 # to earlier import-*.
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278 names = listdir(top)
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279 except error, err:
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280 if onerror is not None:
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281 onerror(err)
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282 return
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283
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284 dirs, nondirs = [], []
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285 for name in names:
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286 if isdir(join(top, name)):
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287 dirs.append(name)
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288 else:
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289 nondirs.append(name)
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290
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291 if topdown:
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292 yield top, dirs, nondirs
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293 for name in dirs:
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294 new_path = join(top, name)
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295 if followlinks or not islink(new_path):
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296 for x in walk(new_path, topdown, onerror, followlinks):
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297 yield x
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298 if not topdown:
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299 yield top, dirs, nondirs
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300
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301 __all__.append("walk")
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302
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303 # Make sure os.environ exists, at least
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304 try:
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305 environ
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306 except NameError:
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307 environ = {}
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308
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309 def execl(file, *args):
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310 """execl(file, *args)
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311
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312 Execute the executable file with argument list args, replacing the
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313 current process. """
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314 execv(file, args)
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315
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316 def execle(file, *args):
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317 """execle(file, *args, env)
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318
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319 Execute the executable file with argument list args and
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320 environment env, replacing the current process. """
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321 env = args[-1]
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322 execve(file, args[:-1], env)
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323
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324 def execlp(file, *args):
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325 """execlp(file, *args)
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326
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327 Execute the executable file (which is searched for along $PATH)
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328 with argument list args, replacing the current process. """
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329 execvp(file, args)
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330
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331 def execlpe(file, *args):
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332 """execlpe(file, *args, env)
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333
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334 Execute the executable file (which is searched for along $PATH)
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335 with argument list args and environment env, replacing the current
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336 process. """
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337 env = args[-1]
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338 execvpe(file, args[:-1], env)
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339
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340 def execvp(file, args):
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341 """execvp(file, args)
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342
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343 Execute the executable file (which is searched for along $PATH)
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344 with argument list args, replacing the current process.
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345 args may be a list or tuple of strings. """
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346 _execvpe(file, args)
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347
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348 def execvpe(file, args, env):
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349 """execvpe(file, args, env)
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350
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351 Execute the executable file (which is searched for along $PATH)
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352 with argument list args and environment env , replacing the
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353 current process.
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354 args may be a list or tuple of strings. """
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355 _execvpe(file, args, env)
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356
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357 __all__.extend(["execl","execle","execlp","execlpe","execvp","execvpe"])
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358
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359 def _execvpe(file, args, env=None):
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360 if env is not None:
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361 func = execve
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362 argrest = (args, env)
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363 else:
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364 func = execv
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365 argrest = (args,)
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366 env = environ
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367
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368 head, tail = path.split(file)
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369 if head:
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370 func(file, *argrest)
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371 return
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372 if 'PATH' in env:
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373 envpath = env['PATH']
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374 else:
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375 envpath = defpath
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376 PATH = envpath.split(pathsep)
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377 saved_exc = None
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378 saved_tb = None
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379 for dir in PATH:
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380 fullname = path.join(dir, file)
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381 try:
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382 func(fullname, *argrest)
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383 except error, e:
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384 tb = sys.exc_info()[2]
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diff changeset
385 if (e.errno != errno.ENOENT and e.errno != errno.ENOTDIR
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
386 and saved_exc is None):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
387 saved_exc = e
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
388 saved_tb = tb
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
389 if saved_exc:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
390 raise error, saved_exc, saved_tb
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
391 raise error, e, tb
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bcclaywell
parents:
diff changeset
392
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bcclaywell
parents:
diff changeset
393 # Change environ to automatically call putenv() if it exists
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bcclaywell
parents:
diff changeset
394 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
395 # This will fail if there's no putenv
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
396 putenv
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
397 except NameError:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
398 pass
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
399 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
400 import UserDict
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
401
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
402 # Fake unsetenv() for Windows
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
403 # not sure about os2 here but
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
404 # I'm guessing they are the same.
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bcclaywell
parents:
diff changeset
405
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
406 if name in ('os2', 'nt'):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
407 def unsetenv(key):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
408 putenv(key, "")
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bcclaywell
parents:
diff changeset
409
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
410 if name == "riscos":
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bcclaywell
parents:
diff changeset
411 # On RISC OS, all env access goes through getenv and putenv
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bcclaywell
parents:
diff changeset
412 from riscosenviron import _Environ
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
413 elif name in ('os2', 'nt'): # Where Env Var Names Must Be UPPERCASE
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bcclaywell
parents:
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414 # But we store them as upper case
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bcclaywell
parents:
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415 class _Environ(UserDict.IterableUserDict):
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bcclaywell
parents:
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416 def __init__(self, environ):
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bcclaywell
parents:
diff changeset
417 UserDict.UserDict.__init__(self)
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parents:
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418 data = self.data
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bcclaywell
parents:
diff changeset
419 for k, v in environ.items():
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bcclaywell
parents:
diff changeset
420 data[k.upper()] = v
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bcclaywell
parents:
diff changeset
421 def __setitem__(self, key, item):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
422 putenv(key, item)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
423 self.data[key.upper()] = item
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bcclaywell
parents:
diff changeset
424 def __getitem__(self, key):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
425 return self.data[key.upper()]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
426 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
427 unsetenv
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
428 except NameError:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
429 def __delitem__(self, key):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
430 del self.data[key.upper()]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
431 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
432 def __delitem__(self, key):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
433 unsetenv(key)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
434 del self.data[key.upper()]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
435 def clear(self):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
436 for key in self.data.keys():
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
437 unsetenv(key)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
438 del self.data[key]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
439 def pop(self, key, *args):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
440 unsetenv(key)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
441 return self.data.pop(key.upper(), *args)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
442 def has_key(self, key):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
443 return key.upper() in self.data
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bcclaywell
parents:
diff changeset
444 def __contains__(self, key):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
445 return key.upper() in self.data
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
446 def get(self, key, failobj=None):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
447 return self.data.get(key.upper(), failobj)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
448 def update(self, dict=None, **kwargs):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
449 if dict:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
450 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
451 keys = dict.keys()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
452 except AttributeError:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
453 # List of (key, value)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
454 for k, v in dict:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
455 self[k] = v
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
456 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
457 # got keys
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
458 # cannot use items(), since mappings
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
459 # may not have them.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
460 for k in keys:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
461 self[k] = dict[k]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
462 if kwargs:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
463 self.update(kwargs)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
464 def copy(self):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
465 return dict(self)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
466
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
467 else: # Where Env Var Names Can Be Mixed Case
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
468 class _Environ(UserDict.IterableUserDict):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
469 def __init__(self, environ):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
470 UserDict.UserDict.__init__(self)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
471 self.data = environ
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
472 def __setitem__(self, key, item):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
473 putenv(key, item)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
474 self.data[key] = item
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
475 def update(self, dict=None, **kwargs):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
476 if dict:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
477 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
478 keys = dict.keys()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
479 except AttributeError:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
480 # List of (key, value)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
481 for k, v in dict:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
482 self[k] = v
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
483 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
484 # got keys
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
485 # cannot use items(), since mappings
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
486 # may not have them.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
487 for k in keys:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
488 self[k] = dict[k]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
489 if kwargs:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
490 self.update(kwargs)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
491 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
492 unsetenv
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
493 except NameError:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
494 pass
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
495 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
496 def __delitem__(self, key):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
497 unsetenv(key)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
498 del self.data[key]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
499 def clear(self):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
500 for key in self.data.keys():
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
501 unsetenv(key)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
502 del self.data[key]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
503 def pop(self, key, *args):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
504 unsetenv(key)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
505 return self.data.pop(key, *args)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
506 def copy(self):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
507 return dict(self)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
508
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
509
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
510 environ = _Environ(environ)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
511
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
512 def getenv(key, default=None):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
513 """Get an environment variable, return None if it doesn't exist.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
514 The optional second argument can specify an alternate default."""
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
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515 return environ.get(key, default)
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516 __all__.append("getenv")
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517
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518 def _exists(name):
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519 return name in globals()
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520
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521 # Supply spawn*() (probably only for Unix)
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522 if _exists("fork") and not _exists("spawnv") and _exists("execv"):
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523
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524 P_WAIT = 0
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525 P_NOWAIT = P_NOWAITO = 1
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526
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527 # XXX Should we support P_DETACH? I suppose it could fork()**2
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528 # and close the std I/O streams. Also, P_OVERLAY is the same
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529 # as execv*()?
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530
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531 def _spawnvef(mode, file, args, env, func):
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532 # Internal helper; func is the exec*() function to use
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533 pid = fork()
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534 if not pid:
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535 # Child
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536 try:
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537 if env is None:
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538 func(file, args)
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539 else:
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540 func(file, args, env)
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541 except:
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542 _exit(127)
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543 else:
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544 # Parent
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545 if mode == P_NOWAIT:
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546 return pid # Caller is responsible for waiting!
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547 while 1:
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548 wpid, sts = waitpid(pid, 0)
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549 if WIFSTOPPED(sts):
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550 continue
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551 elif WIFSIGNALED(sts):
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552 return -WTERMSIG(sts)
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553 elif WIFEXITED(sts):
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554 return WEXITSTATUS(sts)
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555 else:
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556 raise error, "Not stopped, signaled or exited???"
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557
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558 def spawnv(mode, file, args):
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559 """spawnv(mode, file, args) -> integer
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560
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561 Execute file with arguments from args in a subprocess.
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562 If mode == P_NOWAIT return the pid of the process.
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563 If mode == P_WAIT return the process's exit code if it exits normally;
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564 otherwise return -SIG, where SIG is the signal that killed it. """
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565 return _spawnvef(mode, file, args, None, execv)
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566
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567 def spawnve(mode, file, args, env):
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568 """spawnve(mode, file, args, env) -> integer
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569
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570 Execute file with arguments from args in a subprocess with the
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571 specified environment.
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572 If mode == P_NOWAIT return the pid of the process.
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573 If mode == P_WAIT return the process's exit code if it exits normally;
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574 otherwise return -SIG, where SIG is the signal that killed it. """
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575 return _spawnvef(mode, file, args, env, execve)
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576
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577 # Note: spawnvp[e] is't currently supported on Windows
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578
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579 def spawnvp(mode, file, args):
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580 """spawnvp(mode, file, args) -> integer
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581
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582 Execute file (which is looked for along $PATH) with arguments from
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583 args in a subprocess.
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584 If mode == P_NOWAIT return the pid of the process.
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585 If mode == P_WAIT return the process's exit code if it exits normally;
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586 otherwise return -SIG, where SIG is the signal that killed it. """
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587 return _spawnvef(mode, file, args, None, execvp)
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588
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589 def spawnvpe(mode, file, args, env):
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590 """spawnvpe(mode, file, args, env) -> integer
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591
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592 Execute file (which is looked for along $PATH) with arguments from
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593 args in a subprocess with the supplied environment.
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594 If mode == P_NOWAIT return the pid of the process.
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595 If mode == P_WAIT return the process's exit code if it exits normally;
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596 otherwise return -SIG, where SIG is the signal that killed it. """
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597 return _spawnvef(mode, file, args, env, execvpe)
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598
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599 if _exists("spawnv"):
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600 # These aren't supplied by the basic Windows code
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601 # but can be easily implemented in Python
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602
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603 def spawnl(mode, file, *args):
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604 """spawnl(mode, file, *args) -> integer
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605
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606 Execute file with arguments from args in a subprocess.
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607 If mode == P_NOWAIT return the pid of the process.
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608 If mode == P_WAIT return the process's exit code if it exits normally;
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609 otherwise return -SIG, where SIG is the signal that killed it. """
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610 return spawnv(mode, file, args)
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611
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612 def spawnle(mode, file, *args):
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613 """spawnle(mode, file, *args, env) -> integer
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614
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615 Execute file with arguments from args in a subprocess with the
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616 supplied environment.
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617 If mode == P_NOWAIT return the pid of the process.
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618 If mode == P_WAIT return the process's exit code if it exits normally;
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619 otherwise return -SIG, where SIG is the signal that killed it. """
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620 env = args[-1]
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621 return spawnve(mode, file, args[:-1], env)
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622
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623
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624 __all__.extend(["spawnv", "spawnve", "spawnl", "spawnle",])
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625
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626
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627 if _exists("spawnvp"):
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628 # At the moment, Windows doesn't implement spawnvp[e],
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629 # so it won't have spawnlp[e] either.
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630 def spawnlp(mode, file, *args):
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631 """spawnlp(mode, file, *args) -> integer
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632
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633 Execute file (which is looked for along $PATH) with arguments from
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634 args in a subprocess with the supplied environment.
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635 If mode == P_NOWAIT return the pid of the process.
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636 If mode == P_WAIT return the process's exit code if it exits normally;
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637 otherwise return -SIG, where SIG is the signal that killed it. """
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638 return spawnvp(mode, file, args)
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639
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640 def spawnlpe(mode, file, *args):
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641 """spawnlpe(mode, file, *args, env) -> integer
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642
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643 Execute file (which is looked for along $PATH) with arguments from
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644 args in a subprocess with the supplied environment.
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645 If mode == P_NOWAIT return the pid of the process.
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646 If mode == P_WAIT return the process's exit code if it exits normally;
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647 otherwise return -SIG, where SIG is the signal that killed it. """
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648 env = args[-1]
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649 return spawnvpe(mode, file, args[:-1], env)
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650
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651
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652 __all__.extend(["spawnvp", "spawnvpe", "spawnlp", "spawnlpe",])
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653
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654
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655 # Supply popen2 etc. (for Unix)
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656 if _exists("fork"):
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657 if not _exists("popen2"):
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658 def popen2(cmd, mode="t", bufsize=-1):
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659 """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd'
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660 may be a sequence, in which case arguments will be passed directly to
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661 the program without shell intervention (as with os.spawnv()). If 'cmd'
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662 is a string it will be passed to the shell (as with os.system()). If
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663 'bufsize' is specified, it sets the buffer size for the I/O pipes. The
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664 file objects (child_stdin, child_stdout) are returned."""
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665 import warnings
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666 msg = "os.popen2 is deprecated. Use the subprocess module."
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667 warnings.warn(msg, DeprecationWarning, stacklevel=2)
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668
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669 import subprocess
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670 PIPE = subprocess.PIPE
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671 p = subprocess.Popen(cmd, shell=isinstance(cmd, basestring),
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672 bufsize=bufsize, stdin=PIPE, stdout=PIPE,
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673 close_fds=True)
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674 return p.stdin, p.stdout
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675 __all__.append("popen2")
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676
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677 if not _exists("popen3"):
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678 def popen3(cmd, mode="t", bufsize=-1):
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679 """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd'
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680 may be a sequence, in which case arguments will be passed directly to
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681 the program without shell intervention (as with os.spawnv()). If 'cmd'
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682 is a string it will be passed to the shell (as with os.system()). If
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683 'bufsize' is specified, it sets the buffer size for the I/O pipes. The
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684 file objects (child_stdin, child_stdout, child_stderr) are returned."""
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685 import warnings
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686 msg = "os.popen3 is deprecated. Use the subprocess module."
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687 warnings.warn(msg, DeprecationWarning, stacklevel=2)
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688
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689 import subprocess
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690 PIPE = subprocess.PIPE
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691 p = subprocess.Popen(cmd, shell=isinstance(cmd, basestring),
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692 bufsize=bufsize, stdin=PIPE, stdout=PIPE,
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693 stderr=PIPE, close_fds=True)
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694 return p.stdin, p.stdout, p.stderr
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695 __all__.append("popen3")
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696
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697 if not _exists("popen4"):
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698 def popen4(cmd, mode="t", bufsize=-1):
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parents:
diff changeset
699 """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd'
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bcclaywell
parents:
diff changeset
700 may be a sequence, in which case arguments will be passed directly to
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diff changeset
701 the program without shell intervention (as with os.spawnv()). If 'cmd'
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702 is a string it will be passed to the shell (as with os.system()). If
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diff changeset
703 'bufsize' is specified, it sets the buffer size for the I/O pipes. The
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704 file objects (child_stdin, child_stdout_stderr) are returned."""
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diff changeset
705 import warnings
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parents:
diff changeset
706 msg = "os.popen4 is deprecated. Use the subprocess module."
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707 warnings.warn(msg, DeprecationWarning, stacklevel=2)
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diff changeset
708
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709 import subprocess
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710 PIPE = subprocess.PIPE
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711 p = subprocess.Popen(cmd, shell=isinstance(cmd, basestring),
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712 bufsize=bufsize, stdin=PIPE, stdout=PIPE,
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713 stderr=subprocess.STDOUT, close_fds=True)
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714 return p.stdin, p.stdout
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715 __all__.append("popen4")
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parents:
diff changeset
716
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parents:
diff changeset
717 import copy_reg as _copy_reg
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parents:
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718
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parents:
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719 def _make_stat_result(tup, dict):
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diff changeset
720 return stat_result(tup, dict)
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parents:
diff changeset
721
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parents:
diff changeset
722 def _pickle_stat_result(sr):
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parents:
diff changeset
723 (type, args) = sr.__reduce__()
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parents:
diff changeset
724 return (_make_stat_result, args)
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bcclaywell
parents:
diff changeset
725
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
726 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
727 _copy_reg.pickle(stat_result, _pickle_stat_result, _make_stat_result)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
728 except NameError: # stat_result may not exist
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
729 pass
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bcclaywell
parents:
diff changeset
730
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parents:
diff changeset
731 def _make_statvfs_result(tup, dict):
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bcclaywell
parents:
diff changeset
732 return statvfs_result(tup, dict)
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parents:
diff changeset
733
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bcclaywell
parents:
diff changeset
734 def _pickle_statvfs_result(sr):
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bcclaywell
parents:
diff changeset
735 (type, args) = sr.__reduce__()
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bcclaywell
parents:
diff changeset
736 return (_make_statvfs_result, args)
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bcclaywell
parents:
diff changeset
737
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bcclaywell
parents:
diff changeset
738 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
739 _copy_reg.pickle(statvfs_result, _pickle_statvfs_result,
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
740 _make_statvfs_result)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
741 except NameError: # statvfs_result may not exist
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
742 pass