Mercurial > hg
annotate mercurial/posix.py @ 26356:927fa07a2ba4
lock: introduce state to keep track of inheritance
This is part of a series that will allow locks to be inherited by subprocesses
in limited circumstances. In upcoming patches we will refer to this state.
author | Siddharth Agarwal <sid0@fb.com> |
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date | Thu, 24 Sep 2015 15:57:11 -0700 |
parents | 99b6afff09ae |
children | b8381832ce2b c750ed59892a |
rev | line source |
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1 # posix.py - Posix utility function implementations for Mercurial |
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2 # |
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3 # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 import errno |
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11 import fcntl |
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12 import getpass |
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13 import grp |
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14 import os |
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15 import pwd |
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16 import re |
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17 import select |
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18 import socket |
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19 import stat |
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20 import sys |
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21 import tempfile |
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22 import unicodedata |
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23 |
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24 from .i18n import _ |
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25 from . import ( |
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26 encoding, |
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27 ) |
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28 |
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29 posixfile = open |
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30 normpath = os.path.normpath |
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31 samestat = os.path.samestat |
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32 oslink = os.link |
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33 unlink = os.unlink |
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34 rename = os.rename |
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35 removedirs = os.removedirs |
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36 expandglobs = False |
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37 |
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38 umask = os.umask(0) |
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39 os.umask(umask) |
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40 |
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41 def split(p): |
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42 '''Same as posixpath.split, but faster |
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43 |
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44 >>> import posixpath |
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45 >>> for f in ['/absolute/path/to/file', |
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46 ... 'relative/path/to/file', |
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47 ... 'file_alone', |
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48 ... 'path/to/directory/', |
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49 ... '/multiple/path//separators', |
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50 ... '/file_at_root', |
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51 ... '///multiple_leading_separators_at_root', |
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52 ... '']: |
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53 ... assert split(f) == posixpath.split(f), f |
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54 ''' |
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55 ht = p.rsplit('/', 1) |
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56 if len(ht) == 1: |
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57 return '', p |
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58 nh = ht[0].rstrip('/') |
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59 if nh: |
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60 return nh, ht[1] |
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61 return ht[0] + '/', ht[1] |
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62 |
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63 def openhardlinks(): |
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64 '''return true if it is safe to hold open file handles to hardlinks''' |
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65 return True |
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66 |
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67 def nlinks(name): |
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68 '''return number of hardlinks for the given file''' |
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69 return os.lstat(name).st_nlink |
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70 |
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71 def parsepatchoutput(output_line): |
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72 """parses the output produced by patch and returns the filename""" |
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73 pf = output_line[14:] |
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74 if os.sys.platform == 'OpenVMS': |
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75 if pf[0] == '`': |
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76 pf = pf[1:-1] # Remove the quotes |
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77 else: |
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78 if pf.startswith("'") and pf.endswith("'") and " " in pf: |
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79 pf = pf[1:-1] # Remove the quotes |
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80 return pf |
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81 |
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82 def sshargs(sshcmd, host, user, port): |
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83 '''Build argument list for ssh''' |
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84 args = user and ("%s@%s" % (user, host)) or host |
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85 return port and ("%s -p %s" % (args, port)) or args |
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86 |
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87 def isexec(f): |
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88 """check whether a file is executable""" |
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89 return (os.lstat(f).st_mode & 0o100 != 0) |
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90 |
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91 def setflags(f, l, x): |
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92 s = os.lstat(f).st_mode |
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93 if l: |
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94 if not stat.S_ISLNK(s): |
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95 # switch file to link |
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96 fp = open(f) |
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97 data = fp.read() |
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98 fp.close() |
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99 os.unlink(f) |
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100 try: |
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101 os.symlink(data, f) |
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102 except OSError: |
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103 # failed to make a link, rewrite file |
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104 fp = open(f, "w") |
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105 fp.write(data) |
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106 fp.close() |
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107 # no chmod needed at this point |
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108 return |
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109 if stat.S_ISLNK(s): |
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110 # switch link to file |
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111 data = os.readlink(f) |
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112 os.unlink(f) |
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113 fp = open(f, "w") |
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114 fp.write(data) |
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115 fp.close() |
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116 s = 0o666 & ~umask # avoid restatting for chmod |
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117 |
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118 sx = s & 0o100 |
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119 if x and not sx: |
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120 # Turn on +x for every +r bit when making a file executable |
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121 # and obey umask. |
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122 os.chmod(f, s | (s & 0o444) >> 2 & ~umask) |
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123 elif not x and sx: |
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124 # Turn off all +x bits |
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125 os.chmod(f, s & 0o666) |
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126 |
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127 def copymode(src, dst, mode=None): |
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128 '''Copy the file mode from the file at path src to dst. |
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129 If src doesn't exist, we're using mode instead. If mode is None, we're |
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130 using umask.''' |
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131 try: |
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132 st_mode = os.lstat(src).st_mode & 0o777 |
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133 except OSError as inst: |
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134 if inst.errno != errno.ENOENT: |
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135 raise |
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136 st_mode = mode |
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137 if st_mode is None: |
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138 st_mode = ~umask |
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139 st_mode &= 0o666 |
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140 os.chmod(dst, st_mode) |
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141 |
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142 def checkexec(path): |
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143 """ |
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144 Check whether the given path is on a filesystem with UNIX-like exec flags |
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145 |
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146 Requires a directory (like /foo/.hg) |
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147 """ |
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148 |
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149 # VFAT on some Linux versions can flip mode but it doesn't persist |
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150 # a FS remount. Frequently we can detect it if files are created |
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151 # with exec bit on. |
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152 |
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153 try: |
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154 EXECFLAGS = stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH |
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155 fh, fn = tempfile.mkstemp(dir=path, prefix='hg-checkexec-') |
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156 try: |
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157 os.close(fh) |
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158 m = os.stat(fn).st_mode & 0o777 |
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159 new_file_has_exec = m & EXECFLAGS |
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160 os.chmod(fn, m ^ EXECFLAGS) |
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161 exec_flags_cannot_flip = ((os.stat(fn).st_mode & 0o777) == m) |
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162 finally: |
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163 os.unlink(fn) |
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164 except (IOError, OSError): |
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165 # we don't care, the user probably won't be able to commit anyway |
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166 return False |
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167 return not (new_file_has_exec or exec_flags_cannot_flip) |
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168 |
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169 def checklink(path): |
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170 """check whether the given path is on a symlink-capable filesystem""" |
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171 # mktemp is not racy because symlink creation will fail if the |
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172 # file already exists |
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173 name = tempfile.mktemp(dir=path, prefix='hg-checklink-') |
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174 try: |
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175 fd = tempfile.NamedTemporaryFile(dir=path, prefix='hg-checklink-') |
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176 try: |
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177 os.symlink(os.path.basename(fd.name), name) |
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178 os.unlink(name) |
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179 return True |
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180 finally: |
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181 fd.close() |
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182 except AttributeError: |
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183 return False |
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184 except OSError as inst: |
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185 # sshfs might report failure while successfully creating the link |
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186 if inst[0] == errno.EIO and os.path.exists(name): |
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187 os.unlink(name) |
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188 return False |
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189 |
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190 def checkosfilename(path): |
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191 '''Check that the base-relative path is a valid filename on this platform. |
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192 Returns None if the path is ok, or a UI string describing the problem.''' |
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193 pass # on posix platforms, every path is ok |
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194 |
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195 def setbinary(fd): |
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196 pass |
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197 |
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198 def pconvert(path): |
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199 return path |
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200 |
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201 def localpath(path): |
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202 return path |
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203 |
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204 def samefile(fpath1, fpath2): |
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205 """Returns whether path1 and path2 refer to the same file. This is only |
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206 guaranteed to work for files, not directories.""" |
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207 return os.path.samefile(fpath1, fpath2) |
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208 |
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209 def samedevice(fpath1, fpath2): |
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210 """Returns whether fpath1 and fpath2 are on the same device. This is only |
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211 guaranteed to work for files, not directories.""" |
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212 st1 = os.lstat(fpath1) |
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213 st2 = os.lstat(fpath2) |
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214 return st1.st_dev == st2.st_dev |
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215 |
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216 # os.path.normcase is a no-op, which doesn't help us on non-native filesystems |
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217 def normcase(path): |
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218 return path.lower() |
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219 |
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220 # what normcase does to ASCII strings |
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221 normcasespec = encoding.normcasespecs.lower |
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222 # fallback normcase function for non-ASCII strings |
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223 normcasefallback = normcase |
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224 |
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225 if sys.platform == 'darwin': |
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226 |
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227 def normcase(path): |
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228 ''' |
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229 Normalize a filename for OS X-compatible comparison: |
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230 - escape-encode invalid characters |
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231 - decompose to NFD |
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232 - lowercase |
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233 - omit ignored characters [200c-200f, 202a-202e, 206a-206f,feff] |
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234 |
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235 >>> normcase('UPPER') |
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236 'upper' |
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237 >>> normcase('Caf\xc3\xa9') |
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238 'cafe\\xcc\\x81' |
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239 >>> normcase('\xc3\x89') |
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240 'e\\xcc\\x81' |
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241 >>> normcase('\xb8\xca\xc3\xca\xbe\xc8.JPG') # issue3918 |
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242 '%b8%ca%c3\\xca\\xbe%c8.jpg' |
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243 ''' |
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244 |
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245 try: |
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246 return encoding.asciilower(path) # exception for non-ASCII |
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247 except UnicodeDecodeError: |
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248 return normcasefallback(path) |
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249 |
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250 normcasespec = encoding.normcasespecs.lower |
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251 |
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252 def normcasefallback(path): |
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253 try: |
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254 u = path.decode('utf-8') |
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255 except UnicodeDecodeError: |
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256 # OS X percent-encodes any bytes that aren't valid utf-8 |
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257 s = '' |
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258 g = '' |
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259 l = 0 |
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260 for c in path: |
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261 o = ord(c) |
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262 if l and o < 128 or o >= 192: |
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263 # we want a continuation byte, but didn't get one |
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264 s += ''.join(["%%%02X" % ord(x) for x in g]) |
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265 g = '' |
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266 l = 0 |
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267 if l == 0 and o < 128: |
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268 # ascii |
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269 s += c |
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270 elif l == 0 and 194 <= o < 245: |
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271 # valid leading bytes |
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272 if o < 224: |
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273 l = 1 |
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274 elif o < 240: |
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275 l = 2 |
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276 else: |
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277 l = 3 |
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278 g = c |
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279 elif l > 0 and 128 <= o < 192: |
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280 # valid continuations |
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281 g += c |
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282 l -= 1 |
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283 if not l: |
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284 s += g |
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285 g = '' |
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286 else: |
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287 # invalid |
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288 s += "%%%02X" % o |
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289 |
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290 # any remaining partial characters |
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291 s += ''.join(["%%%02X" % ord(x) for x in g]) |
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292 u = s.decode('utf-8') |
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293 |
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294 # Decompose then lowercase (HFS+ technote specifies lower) |
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295 enc = unicodedata.normalize('NFD', u).lower().encode('utf-8') |
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296 # drop HFS+ ignored characters |
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297 return encoding.hfsignoreclean(enc) |
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298 |
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299 if sys.platform == 'cygwin': |
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300 # workaround for cygwin, in which mount point part of path is |
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301 # treated as case sensitive, even though underlying NTFS is case |
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302 # insensitive. |
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303 |
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304 # default mount points |
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305 cygwinmountpoints = sorted([ |
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306 "/usr/bin", |
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307 "/usr/lib", |
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308 "/cygdrive", |
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309 ], reverse=True) |
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310 |
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311 # use upper-ing as normcase as same as NTFS workaround |
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312 def normcase(path): |
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313 pathlen = len(path) |
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314 if (pathlen == 0) or (path[0] != os.sep): |
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315 # treat as relative |
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316 return encoding.upper(path) |
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317 |
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318 # to preserve case of mountpoint part |
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319 for mp in cygwinmountpoints: |
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320 if not path.startswith(mp): |
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321 continue |
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322 |
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323 mplen = len(mp) |
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324 if mplen == pathlen: # mount point itself |
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325 return mp |
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326 if path[mplen] == os.sep: |
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327 return mp + encoding.upper(path[mplen:]) |
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328 |
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329 return encoding.upper(path) |
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330 |
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331 normcasespec = encoding.normcasespecs.other |
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332 normcasefallback = normcase |
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333 |
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334 # Cygwin translates native ACLs to POSIX permissions, |
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335 # but these translations are not supported by native |
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336 # tools, so the exec bit tends to be set erroneously. |
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337 # Therefore, disable executable bit access on Cygwin. |
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338 def checkexec(path): |
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339 return False |
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340 |
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341 # Similarly, Cygwin's symlink emulation is likely to create |
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342 # problems when Mercurial is used from both Cygwin and native |
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343 # Windows, with other native tools, or on shared volumes |
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344 def checklink(path): |
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345 return False |
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|
346 |
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347 _needsshellquote = None |
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348 def shellquote(s): |
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349 if os.sys.platform == 'OpenVMS': |
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350 return '"%s"' % s |
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|
351 global _needsshellquote |
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352 if _needsshellquote is None: |
26248
99b6afff09ae
posix: shellquote do not require quoting for "+" (issue4818)
timeless@mozdev.org
parents:
25967
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|
353 _needsshellquote = re.compile(r'[^a-zA-Z0-9._/+-]').search |
24108
d65ecb814fc0
shellquote: fix missing quotes for empty string
Yuya Nishihara <yuya@tcha.org>
parents:
23683
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|
354 if s and not _needsshellquote(s): |
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|
355 # "s" shouldn't have to be quoted |
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356 return s |
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357 else: |
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358 return "'%s'" % s.replace("'", "'\\''") |
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|
359 |
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360 def quotecommand(cmd): |
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361 return cmd |
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362 |
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363 def popen(command, mode='r'): |
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364 return os.popen(command, mode) |
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parents:
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|
365 |
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366 def testpid(pid): |
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367 '''return False if pid dead, True if running or not sure''' |
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368 if os.sys.platform == 'OpenVMS': |
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369 return True |
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370 try: |
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371 os.kill(pid, 0) |
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372 return True |
25660
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global: mass rewrite to use modern exception syntax
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parents:
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373 except OSError as inst: |
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374 return inst.errno != errno.ESRCH |
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|
375 |
14234
600e64004eb5
rename explain_exit to explainexit
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parents:
14233
diff
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|
376 def explainexit(code): |
9517
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util.system: Use subprocess instead of os.system
Mads Kiilerich <mads@kiilerich.com>
parents:
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377 """return a 2-tuple (desc, code) describing a subprocess status |
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util.system: Use subprocess instead of os.system
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parents:
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|
378 (codes from kill are negative - not os.system/wait encoding)""" |
4368f582c806
util.system: Use subprocess instead of os.system
Mads Kiilerich <mads@kiilerich.com>
parents:
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|
379 if code >= 0: |
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util.system: Use subprocess instead of os.system
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parents:
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|
380 return _("exited with status %d") % code, code |
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parents:
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381 return _("killed by signal %d") % -code, -code |
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parents:
diff
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|
382 |
8657
3fa92c618624
posix: do not use fstat in isowner
Martin Geisler <mg@lazybytes.net>
parents:
8614
diff
changeset
|
383 def isowner(st): |
3fa92c618624
posix: do not use fstat in isowner
Martin Geisler <mg@lazybytes.net>
parents:
8614
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|
384 """Return True if the stat object st is from the current user.""" |
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385 return st.st_uid == os.getuid() |
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parents:
diff
changeset
|
386 |
14271
4030630fb59c
rename util.find_exe to findexe
Adrian Buehlmann <adrian@cadifra.com>
parents:
14237
diff
changeset
|
387 def findexe(command): |
7890
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parents:
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|
388 '''Find executable for command searching like which does. |
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parents:
diff
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|
389 If command is a basename then PATH is searched for command. |
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parents:
diff
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|
390 PATH isn't searched if command is an absolute or relative path. |
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parents:
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|
391 If command isn't found None is returned.''' |
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parents:
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|
392 if sys.platform == 'OpenVMS': |
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parents:
diff
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|
393 return command |
e710f0f592b2
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parents:
diff
changeset
|
394 |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
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|
395 def findexisting(executable): |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
396 'Will return executable if existing file' |
15499
58f96703a9ab
posix: fix findexe() to check for file type and access
Marc-Antoine Ruel <maruel@google.com>
parents:
15488
diff
changeset
|
397 if os.path.isfile(executable) and os.access(executable, os.X_OK): |
7890
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parents:
diff
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|
398 return executable |
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parents:
diff
changeset
|
399 return None |
e710f0f592b2
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parents:
diff
changeset
|
400 |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
401 if os.sep in command: |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
402 return findexisting(command) |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
403 |
16383
f5dd179bfa4a
plan9: initial support for plan 9 from bell labs
Steven Stallion <sstallion@gmail.com>
parents:
16241
diff
changeset
|
404 if sys.platform == 'plan9': |
f5dd179bfa4a
plan9: initial support for plan 9 from bell labs
Steven Stallion <sstallion@gmail.com>
parents:
16241
diff
changeset
|
405 return findexisting(os.path.join('/bin', command)) |
f5dd179bfa4a
plan9: initial support for plan 9 from bell labs
Steven Stallion <sstallion@gmail.com>
parents:
16241
diff
changeset
|
406 |
7890
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parents:
diff
changeset
|
407 for path in os.environ.get('PATH', '').split(os.pathsep): |
e710f0f592b2
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parents:
diff
changeset
|
408 executable = findexisting(os.path.join(path, command)) |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
409 if executable is not None: |
15499
58f96703a9ab
posix: fix findexe() to check for file type and access
Marc-Antoine Ruel <maruel@google.com>
parents:
15488
diff
changeset
|
410 return executable |
7890
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
411 return None |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
412 |
14237
4d684d8210a1
rename util.set_signal_handler to setsignalhandler
Adrian Buehlmann <adrian@cadifra.com>
parents:
14235
diff
changeset
|
413 def setsignalhandler(): |
7890
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
414 pass |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
415 |
18017
74912fe3d718
dirstate: move file type filtering to its source
Bryan O'Sullivan <bryano@fb.com>
parents:
17560
diff
changeset
|
416 _wantedkinds = set([stat.S_IFREG, stat.S_IFLNK]) |
74912fe3d718
dirstate: move file type filtering to its source
Bryan O'Sullivan <bryano@fb.com>
parents:
17560
diff
changeset
|
417 |
7890
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
418 def statfiles(files): |
18017
74912fe3d718
dirstate: move file type filtering to its source
Bryan O'Sullivan <bryano@fb.com>
parents:
17560
diff
changeset
|
419 '''Stat each file in files. Yield each stat, or None if a file does not |
74912fe3d718
dirstate: move file type filtering to its source
Bryan O'Sullivan <bryano@fb.com>
parents:
17560
diff
changeset
|
420 exist or has a type we don't care about.''' |
7890
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
421 lstat = os.lstat |
18017
74912fe3d718
dirstate: move file type filtering to its source
Bryan O'Sullivan <bryano@fb.com>
parents:
17560
diff
changeset
|
422 getkind = stat.S_IFMT |
7890
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
423 for nf in files: |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
424 try: |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
425 st = lstat(nf) |
18017
74912fe3d718
dirstate: move file type filtering to its source
Bryan O'Sullivan <bryano@fb.com>
parents:
17560
diff
changeset
|
426 if getkind(st.st_mode) not in _wantedkinds: |
74912fe3d718
dirstate: move file type filtering to its source
Bryan O'Sullivan <bryano@fb.com>
parents:
17560
diff
changeset
|
427 st = None |
25660
328739ea70c3
global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25658
diff
changeset
|
428 except OSError as err: |
7890
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
429 if err.errno not in (errno.ENOENT, errno.ENOTDIR): |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
430 raise |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
431 st = None |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
432 yield st |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
433 |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
434 def getuser(): |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
435 '''return name of current user''' |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
436 return getpass.getuser() |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
437 |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
438 def username(uid=None): |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
439 """Return the name of the user with the given uid. |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
440 |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
441 If uid is None, return the name of the current user.""" |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
442 |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
443 if uid is None: |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
444 uid = os.getuid() |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
445 try: |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
446 return pwd.getpwuid(uid)[0] |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
447 except KeyError: |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
448 return str(uid) |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
449 |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
450 def groupname(gid=None): |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
451 """Return the name of the group with the given gid. |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
452 |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
453 If gid is None, return the name of the current group.""" |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
454 |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
455 if gid is None: |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
456 gid = os.getgid() |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
457 try: |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
458 return grp.getgrgid(gid)[0] |
e710f0f592b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
459 except KeyError: |
e710f0f592b2
util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
460 return str(gid) |
10237
2f7a38f336f4
serve: add and use portable spawnvp replacement
Patrick Mezard <pmezard@gmail.com>
parents:
10218
diff
changeset
|
461 |
11138
99eee847beaa
acl: grp module is not available on windows
Patrick Mezard <pmezard@gmail.com>
parents:
11011
diff
changeset
|
462 def groupmembers(name): |
99eee847beaa
acl: grp module is not available on windows
Patrick Mezard <pmezard@gmail.com>
parents:
11011
diff
changeset
|
463 """Return the list of members of the group with the given |
99eee847beaa
acl: grp module is not available on windows
Patrick Mezard <pmezard@gmail.com>
parents:
11011
diff
changeset
|
464 name, KeyError if the group does not exist. |
99eee847beaa
acl: grp module is not available on windows
Patrick Mezard <pmezard@gmail.com>
parents:
11011
diff
changeset
|
465 """ |
99eee847beaa
acl: grp module is not available on windows
Patrick Mezard <pmezard@gmail.com>
parents:
11011
diff
changeset
|
466 return list(grp.getgrnam(name).gr_mem) |
99eee847beaa
acl: grp module is not available on windows
Patrick Mezard <pmezard@gmail.com>
parents:
11011
diff
changeset
|
467 |
10237
2f7a38f336f4
serve: add and use portable spawnvp replacement
Patrick Mezard <pmezard@gmail.com>
parents:
10218
diff
changeset
|
468 def spawndetached(args): |
2f7a38f336f4
serve: add and use portable spawnvp replacement
Patrick Mezard <pmezard@gmail.com>
parents:
10218
diff
changeset
|
469 return os.spawnvp(os.P_NOWAIT | getattr(os, 'P_DETACH', 0), |
2f7a38f336f4
serve: add and use portable spawnvp replacement
Patrick Mezard <pmezard@gmail.com>
parents:
10218
diff
changeset
|
470 args[0], args) |
2f7a38f336f4
serve: add and use portable spawnvp replacement
Patrick Mezard <pmezard@gmail.com>
parents:
10218
diff
changeset
|
471 |
10239
8e4be44a676f
Find right hg command for detached process
Patrick Mezard <pmezard@gmail.com>
parents:
10237
diff
changeset
|
472 def gethgcmd(): |
8e4be44a676f
Find right hg command for detached process
Patrick Mezard <pmezard@gmail.com>
parents:
10237
diff
changeset
|
473 return sys.argv[:1] |
11010
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
474 |
12689
c52c629ce19e
termwidth: move to ui.ui from util
Augie Fackler <durin42@gmail.com>
parents:
11138
diff
changeset
|
475 def termwidth(): |
11010
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
476 try: |
25967
224a33452ed4
posix: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
477 import array |
224a33452ed4
posix: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
478 import termios |
11010
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
479 for dev in (sys.stderr, sys.stdout, sys.stdin): |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
480 try: |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
481 try: |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
482 fd = dev.fileno() |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
483 except AttributeError: |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
484 continue |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
485 if not os.isatty(fd): |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
486 continue |
16726
7002bb17cc5e
posix: workaround lack of TIOCGWINSZ on Irix (issue3449)
Mark Round <hg@markround.com>
parents:
16383
diff
changeset
|
487 try: |
7002bb17cc5e
posix: workaround lack of TIOCGWINSZ on Irix (issue3449)
Mark Round <hg@markround.com>
parents:
16383
diff
changeset
|
488 arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8) |
7002bb17cc5e
posix: workaround lack of TIOCGWINSZ on Irix (issue3449)
Mark Round <hg@markround.com>
parents:
16383
diff
changeset
|
489 width = array.array('h', arri)[1] |
7002bb17cc5e
posix: workaround lack of TIOCGWINSZ on Irix (issue3449)
Mark Round <hg@markround.com>
parents:
16383
diff
changeset
|
490 if width > 0: |
7002bb17cc5e
posix: workaround lack of TIOCGWINSZ on Irix (issue3449)
Mark Round <hg@markround.com>
parents:
16383
diff
changeset
|
491 return width |
7002bb17cc5e
posix: workaround lack of TIOCGWINSZ on Irix (issue3449)
Mark Round <hg@markround.com>
parents:
16383
diff
changeset
|
492 except AttributeError: |
7002bb17cc5e
posix: workaround lack of TIOCGWINSZ on Irix (issue3449)
Mark Round <hg@markround.com>
parents:
16383
diff
changeset
|
493 pass |
11010
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
494 except ValueError: |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
495 pass |
25660
328739ea70c3
global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25658
diff
changeset
|
496 except IOError as e: |
11010
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
497 if e[0] == errno.EINVAL: |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
498 pass |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
499 else: |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
500 raise |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
501 except ImportError: |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
502 pass |
18e81d42ee5c
util: fix default termwidth() under Windows
Patrick Mezard <pmezard@gmail.com>
parents:
10264
diff
changeset
|
503 return 80 |
14908
e2b5605501df
util: move "default" makedir to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14273
diff
changeset
|
504 |
e2b5605501df
util: move "default" makedir to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14273
diff
changeset
|
505 def makedir(path, notindexed): |
e2b5605501df
util: move "default" makedir to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14273
diff
changeset
|
506 os.mkdir(path) |
14909
c627fe32c923
util: move "default" unlinkpath to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14908
diff
changeset
|
507 |
18143
242d2f4ec01c
util: fold ENOENT check into unlinkpath, controlled by new ignoremissing flag
Mads Kiilerich <madski@unity3d.com>
parents:
18097
diff
changeset
|
508 def unlinkpath(f, ignoremissing=False): |
14909
c627fe32c923
util: move "default" unlinkpath to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14908
diff
changeset
|
509 """unlink and remove the directory if it is empty""" |
18143
242d2f4ec01c
util: fold ENOENT check into unlinkpath, controlled by new ignoremissing flag
Mads Kiilerich <madski@unity3d.com>
parents:
18097
diff
changeset
|
510 try: |
242d2f4ec01c
util: fold ENOENT check into unlinkpath, controlled by new ignoremissing flag
Mads Kiilerich <madski@unity3d.com>
parents:
18097
diff
changeset
|
511 os.unlink(f) |
25660
328739ea70c3
global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25658
diff
changeset
|
512 except OSError as e: |
18143
242d2f4ec01c
util: fold ENOENT check into unlinkpath, controlled by new ignoremissing flag
Mads Kiilerich <madski@unity3d.com>
parents:
18097
diff
changeset
|
513 if not (ignoremissing and e.errno == errno.ENOENT): |
242d2f4ec01c
util: fold ENOENT check into unlinkpath, controlled by new ignoremissing flag
Mads Kiilerich <madski@unity3d.com>
parents:
18097
diff
changeset
|
514 raise |
14909
c627fe32c923
util: move "default" unlinkpath to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14908
diff
changeset
|
515 # try removing directories that might now be empty |
c627fe32c923
util: move "default" unlinkpath to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14908
diff
changeset
|
516 try: |
c627fe32c923
util: move "default" unlinkpath to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14908
diff
changeset
|
517 os.removedirs(os.path.dirname(f)) |
c627fe32c923
util: move "default" unlinkpath to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14908
diff
changeset
|
518 except OSError: |
c627fe32c923
util: move "default" unlinkpath to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14908
diff
changeset
|
519 pass |
c627fe32c923
util: move "default" unlinkpath to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14908
diff
changeset
|
520 |
14910
570ea0259b0a
util: move "default" lookupreg to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14909
diff
changeset
|
521 def lookupreg(key, name=None, scope=None): |
570ea0259b0a
util: move "default" lookupreg to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14909
diff
changeset
|
522 return None |
14911
5b39503157fd
util: move "default" hidewindow to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14910
diff
changeset
|
523 |
5b39503157fd
util: move "default" hidewindow to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14910
diff
changeset
|
524 def hidewindow(): |
5b39503157fd
util: move "default" hidewindow to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14910
diff
changeset
|
525 """Hide current shell window. |
5b39503157fd
util: move "default" hidewindow to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14910
diff
changeset
|
526 |
5b39503157fd
util: move "default" hidewindow to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14910
diff
changeset
|
527 Used to hide the window opened when starting asynchronous |
5b39503157fd
util: move "default" hidewindow to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14910
diff
changeset
|
528 child process under Windows, unneeded on other systems. |
5b39503157fd
util: move "default" hidewindow to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14910
diff
changeset
|
529 """ |
5b39503157fd
util: move "default" hidewindow to posix.py
Adrian Buehlmann <adrian@cadifra.com>
parents:
14910
diff
changeset
|
530 pass |
14926
4e7e63fc685a
util: eliminate wildcard imports
Adrian Buehlmann <adrian@cadifra.com>
parents:
14911
diff
changeset
|
531 |
14927
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
532 class cachestat(object): |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
533 def __init__(self, path): |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
534 self.stat = os.stat(path) |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
535 |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
536 def cacheable(self): |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
537 return bool(self.stat.st_ino) |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
538 |
15791
a814f8fcc65a
Use explicit integer division
Martin Geisler <mg@aragost.com>
parents:
15711
diff
changeset
|
539 __hash__ = object.__hash__ |
a814f8fcc65a
Use explicit integer division
Martin Geisler <mg@aragost.com>
parents:
15711
diff
changeset
|
540 |
14927
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
541 def __eq__(self, other): |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
542 try: |
18442
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
543 # Only dev, ino, size, mtime and atime are likely to change. Out |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
544 # of these, we shouldn't compare atime but should compare the |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
545 # rest. However, one of the other fields changing indicates |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
546 # something fishy going on, so return False if anything but atime |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
547 # changes. |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
548 return (self.stat.st_mode == other.stat.st_mode and |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
549 self.stat.st_ino == other.stat.st_ino and |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
550 self.stat.st_dev == other.stat.st_dev and |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
551 self.stat.st_nlink == other.stat.st_nlink and |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
552 self.stat.st_uid == other.stat.st_uid and |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
553 self.stat.st_gid == other.stat.st_gid and |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
554 self.stat.st_size == other.stat.st_size and |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
555 self.stat.st_mtime == other.stat.st_mtime and |
ecba9b0e7672
posix: don't compare atime when determining if a file has changed
Siddharth Agarwal <sid0@fb.com>
parents:
18288
diff
changeset
|
556 self.stat.st_ctime == other.stat.st_ctime) |
14927
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
557 except AttributeError: |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
558 return False |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
559 |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
560 def __ne__(self, other): |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
561 return not self == other |
2aa3e07b2f07
posix, windows: introduce cachestat
Idan Kamara <idankk86@gmail.com>
parents:
14926
diff
changeset
|
562 |
14926
4e7e63fc685a
util: eliminate wildcard imports
Adrian Buehlmann <adrian@cadifra.com>
parents:
14911
diff
changeset
|
563 def executablepath(): |
4e7e63fc685a
util: eliminate wildcard imports
Adrian Buehlmann <adrian@cadifra.com>
parents:
14911
diff
changeset
|
564 return None # available on Windows only |
18097
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
565 |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
566 class unixdomainserver(socket.socket): |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
567 def __init__(self, join, subsystem): |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
568 '''Create a unix domain socket with the given prefix.''' |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
569 super(unixdomainserver, self).__init__(socket.AF_UNIX) |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
570 sockname = subsystem + '.sock' |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
571 self.realpath = self.path = join(sockname) |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
572 if os.path.islink(self.path): |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
573 if os.path.exists(self.path): |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
574 self.realpath = os.readlink(self.path) |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
575 else: |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
576 os.unlink(self.path) |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
577 try: |
ae54cff742e2
posix: move server side of unix domain sockets out of inotify
Bryan O'Sullivan <bryano@fb.com>
parents:
18017
diff
changeset
|
578 self.bind(self.realpath) |
25660
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579 except socket.error as err: |
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580 if err.args[0] == 'AF_UNIX path too long': |
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581 tmpdir = tempfile.mkdtemp(prefix='hg-%s-' % subsystem) |
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582 self.realpath = os.path.join(tmpdir, sockname) |
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583 try: |
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584 self.bind(self.realpath) |
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585 os.symlink(self.realpath, self.path) |
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586 except (OSError, socket.error): |
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587 self.cleanup() |
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588 raise |
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589 else: |
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590 raise |
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591 self.listen(5) |
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592 |
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593 def cleanup(self): |
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594 def okayifmissing(f, path): |
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595 try: |
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596 f(path) |
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597 except OSError as err: |
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598 if err.errno != errno.ENOENT: |
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599 raise |
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600 |
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601 okayifmissing(os.unlink, self.path) |
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602 if self.realpath != self.path: |
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603 okayifmissing(os.unlink, self.realpath) |
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604 okayifmissing(os.rmdir, os.path.dirname(self.realpath)) |
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605 |
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606 def statislink(st): |
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607 '''check whether a stat result is a symlink''' |
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608 return st and stat.S_ISLNK(st.st_mode) |
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609 |
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610 def statisexec(st): |
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611 '''check whether a stat result is an executable file''' |
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612 return st and (st.st_mode & 0o100 != 0) |
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613 |
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614 def poll(fds): |
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615 """block until something happens on any file descriptor |
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616 |
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617 This is a generic helper that will check for any activity |
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618 (read, write. exception) and return the list of touched files. |
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619 |
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620 In unsupported cases, it will raise a NotImplementedError""" |
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621 try: |
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622 res = select.select(fds, fds, fds) |
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623 except ValueError: # out of range file descriptor |
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624 raise NotImplementedError() |
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625 return sorted(list(set(sum(res, [])))) |
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626 |
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627 def readpipe(pipe): |
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628 """Read all available data from a pipe.""" |
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629 # We can't fstat() a pipe because Linux will always report 0. |
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630 # So, we set the pipe to non-blocking mode and read everything |
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631 # that's available. |
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632 flags = fcntl.fcntl(pipe, fcntl.F_GETFL) |
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633 flags |= os.O_NONBLOCK |
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634 oldflags = fcntl.fcntl(pipe, fcntl.F_SETFL, flags) |
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635 |
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636 try: |
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637 chunks = [] |
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638 while True: |
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639 try: |
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640 s = pipe.read() |
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641 if not s: |
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642 break |
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643 chunks.append(s) |
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644 except IOError: |
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645 break |
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646 |
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647 return ''.join(chunks) |
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648 finally: |
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649 fcntl.fcntl(pipe, fcntl.F_SETFL, oldflags) |