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@@ -1,649 +1,626 b'' | |||
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1 | 1 | # posix.py - Posix utility function implementations for Mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | from __future__ import absolute_import |
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9 | 9 | |
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10 | 10 | import errno |
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11 | 11 | import fcntl |
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12 | 12 | import getpass |
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13 | 13 | import grp |
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14 | 14 | import os |
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15 | 15 | import pwd |
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16 | 16 | import re |
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17 | 17 | import select |
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18 | 18 | import socket |
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19 | 19 | import stat |
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20 | 20 | import sys |
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21 | 21 | import tempfile |
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22 | 22 | import unicodedata |
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23 | 23 | |
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24 | 24 | from .i18n import _ |
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25 | 25 | from . import ( |
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26 | 26 | encoding, |
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27 | 27 | ) |
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28 | 28 | |
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29 | 29 | posixfile = open |
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30 | 30 | normpath = os.path.normpath |
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31 | 31 | samestat = os.path.samestat |
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32 | 32 | oslink = os.link |
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33 | 33 | unlink = os.unlink |
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34 | 34 | rename = os.rename |
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35 | 35 | removedirs = os.removedirs |
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36 | 36 | expandglobs = False |
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37 | 37 | |
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38 | 38 | umask = os.umask(0) |
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39 | 39 | os.umask(umask) |
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40 | 40 | |
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41 | 41 | def split(p): |
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42 | 42 | '''Same as posixpath.split, but faster |
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43 | 43 | |
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44 | 44 | >>> import posixpath |
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45 | 45 | >>> for f in ['/absolute/path/to/file', |
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46 | 46 | ... 'relative/path/to/file', |
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47 | 47 | ... 'file_alone', |
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48 | 48 | ... 'path/to/directory/', |
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49 | 49 | ... '/multiple/path//separators', |
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50 | 50 | ... '/file_at_root', |
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51 | 51 | ... '///multiple_leading_separators_at_root', |
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52 | 52 | ... '']: |
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53 | 53 | ... assert split(f) == posixpath.split(f), f |
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54 | 54 | ''' |
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55 | 55 | ht = p.rsplit('/', 1) |
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56 | 56 | if len(ht) == 1: |
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57 | 57 | return '', p |
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58 | 58 | nh = ht[0].rstrip('/') |
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59 | 59 | if nh: |
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60 | 60 | return nh, ht[1] |
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61 | 61 | return ht[0] + '/', ht[1] |
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62 | 62 | |
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63 | 63 | def openhardlinks(): |
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64 | 64 | '''return true if it is safe to hold open file handles to hardlinks''' |
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65 | 65 | return True |
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66 | 66 | |
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67 | 67 | def nlinks(name): |
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68 | 68 | '''return number of hardlinks for the given file''' |
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69 | 69 | return os.lstat(name).st_nlink |
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70 | 70 | |
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71 | 71 | def parsepatchoutput(output_line): |
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72 | 72 | """parses the output produced by patch and returns the filename""" |
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73 | 73 | pf = output_line[14:] |
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74 | 74 | if os.sys.platform == 'OpenVMS': |
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75 | 75 | if pf[0] == '`': |
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76 | 76 | pf = pf[1:-1] # Remove the quotes |
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77 | 77 | else: |
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78 | 78 | if pf.startswith("'") and pf.endswith("'") and " " in pf: |
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79 | 79 | pf = pf[1:-1] # Remove the quotes |
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80 | 80 | return pf |
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81 | 81 | |
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82 | 82 | def sshargs(sshcmd, host, user, port): |
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83 | 83 | '''Build argument list for ssh''' |
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84 | 84 | args = user and ("%s@%s" % (user, host)) or host |
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85 | 85 | return port and ("%s -p %s" % (args, port)) or args |
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86 | 86 | |
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87 | 87 | def isexec(f): |
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88 | 88 | """check whether a file is executable""" |
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89 | 89 | return (os.lstat(f).st_mode & 0o100 != 0) |
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90 | 90 | |
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91 | 91 | def setflags(f, l, x): |
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92 | 92 | s = os.lstat(f).st_mode |
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93 | 93 | if l: |
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94 | 94 | if not stat.S_ISLNK(s): |
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95 | 95 | # switch file to link |
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96 | 96 | fp = open(f) |
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97 | 97 | data = fp.read() |
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98 | 98 | fp.close() |
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99 | 99 | os.unlink(f) |
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100 | 100 | try: |
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101 | 101 | os.symlink(data, f) |
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102 | 102 | except OSError: |
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103 | 103 | # failed to make a link, rewrite file |
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104 | 104 | fp = open(f, "w") |
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105 | 105 | fp.write(data) |
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106 | 106 | fp.close() |
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107 | 107 | # no chmod needed at this point |
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108 | 108 | return |
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109 | 109 | if stat.S_ISLNK(s): |
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110 | 110 | # switch link to file |
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111 | 111 | data = os.readlink(f) |
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112 | 112 | os.unlink(f) |
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113 | 113 | fp = open(f, "w") |
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114 | 114 | fp.write(data) |
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115 | 115 | fp.close() |
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116 | 116 | s = 0o666 & ~umask # avoid restatting for chmod |
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117 | 117 | |
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118 | 118 | sx = s & 0o100 |
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119 | 119 | if x and not sx: |
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120 | 120 | # Turn on +x for every +r bit when making a file executable |
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121 | 121 | # and obey umask. |
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122 | 122 | os.chmod(f, s | (s & 0o444) >> 2 & ~umask) |
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123 | 123 | elif not x and sx: |
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124 | 124 | # Turn off all +x bits |
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125 | 125 | os.chmod(f, s & 0o666) |
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126 | 126 | |
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127 | 127 | def copymode(src, dst, mode=None): |
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128 | 128 | '''Copy the file mode from the file at path src to dst. |
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129 | 129 | If src doesn't exist, we're using mode instead. If mode is None, we're |
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130 | 130 | using umask.''' |
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131 | 131 | try: |
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132 | 132 | st_mode = os.lstat(src).st_mode & 0o777 |
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133 | 133 | except OSError as inst: |
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134 | 134 | if inst.errno != errno.ENOENT: |
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135 | 135 | raise |
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136 | 136 | st_mode = mode |
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137 | 137 | if st_mode is None: |
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138 | 138 | st_mode = ~umask |
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139 | 139 | st_mode &= 0o666 |
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140 | 140 | os.chmod(dst, st_mode) |
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141 | 141 | |
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142 | 142 | def checkexec(path): |
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143 | 143 | """ |
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144 | 144 | Check whether the given path is on a filesystem with UNIX-like exec flags |
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145 | 145 | |
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146 | 146 | Requires a directory (like /foo/.hg) |
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147 | 147 | """ |
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148 | 148 | |
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149 | 149 | # VFAT on some Linux versions can flip mode but it doesn't persist |
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150 | 150 | # a FS remount. Frequently we can detect it if files are created |
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151 | 151 | # with exec bit on. |
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152 | 152 | |
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153 | 153 | try: |
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154 | 154 | EXECFLAGS = stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH |
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155 | 155 | fh, fn = tempfile.mkstemp(dir=path, prefix='hg-checkexec-') |
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156 | 156 | try: |
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157 | 157 | os.close(fh) |
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158 | 158 | m = os.stat(fn).st_mode & 0o777 |
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159 | 159 | new_file_has_exec = m & EXECFLAGS |
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160 | 160 | os.chmod(fn, m ^ EXECFLAGS) |
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161 | 161 | exec_flags_cannot_flip = ((os.stat(fn).st_mode & 0o777) == m) |
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162 | 162 | finally: |
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163 | 163 | os.unlink(fn) |
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164 | 164 | except (IOError, OSError): |
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165 | 165 | # we don't care, the user probably won't be able to commit anyway |
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166 | 166 | return False |
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167 | 167 | return not (new_file_has_exec or exec_flags_cannot_flip) |
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168 | 168 | |
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169 | 169 | def checklink(path): |
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170 | 170 | """check whether the given path is on a symlink-capable filesystem""" |
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171 | 171 | # mktemp is not racy because symlink creation will fail if the |
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172 | 172 | # file already exists |
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173 | 173 | name = tempfile.mktemp(dir=path, prefix='hg-checklink-') |
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174 | 174 | try: |
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175 | 175 | fd = tempfile.NamedTemporaryFile(dir=path, prefix='hg-checklink-') |
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176 | 176 | try: |
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177 | 177 | os.symlink(os.path.basename(fd.name), name) |
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178 | 178 | os.unlink(name) |
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179 | 179 | return True |
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180 | 180 | finally: |
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181 | 181 | fd.close() |
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182 | 182 | except AttributeError: |
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183 | 183 | return False |
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184 | 184 | except OSError as inst: |
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185 | 185 | # sshfs might report failure while successfully creating the link |
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186 | 186 | if inst[0] == errno.EIO and os.path.exists(name): |
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187 | 187 | os.unlink(name) |
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188 | 188 | return False |
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189 | 189 | |
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190 | 190 | def checkosfilename(path): |
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191 | 191 | '''Check that the base-relative path is a valid filename on this platform. |
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192 | 192 | Returns None if the path is ok, or a UI string describing the problem.''' |
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193 | 193 | pass # on posix platforms, every path is ok |
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194 | 194 | |
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195 | 195 | def setbinary(fd): |
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196 | 196 | pass |
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197 | 197 | |
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198 | 198 | def pconvert(path): |
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199 | 199 | return path |
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200 | 200 | |
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201 | 201 | def localpath(path): |
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202 | 202 | return path |
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203 | 203 | |
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204 | 204 | def samefile(fpath1, fpath2): |
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205 | 205 | """Returns whether path1 and path2 refer to the same file. This is only |
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206 | 206 | guaranteed to work for files, not directories.""" |
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207 | 207 | return os.path.samefile(fpath1, fpath2) |
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208 | 208 | |
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209 | 209 | def samedevice(fpath1, fpath2): |
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210 | 210 | """Returns whether fpath1 and fpath2 are on the same device. This is only |
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211 | 211 | guaranteed to work for files, not directories.""" |
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212 | 212 | st1 = os.lstat(fpath1) |
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213 | 213 | st2 = os.lstat(fpath2) |
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214 | 214 | return st1.st_dev == st2.st_dev |
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215 | 215 | |
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216 | 216 | # os.path.normcase is a no-op, which doesn't help us on non-native filesystems |
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217 | 217 | def normcase(path): |
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218 | 218 | return path.lower() |
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219 | 219 | |
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220 | 220 | # what normcase does to ASCII strings |
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221 | 221 | normcasespec = encoding.normcasespecs.lower |
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222 | 222 | # fallback normcase function for non-ASCII strings |
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223 | 223 | normcasefallback = normcase |
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224 | 224 | |
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225 | 225 | if sys.platform == 'darwin': |
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226 | 226 | |
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227 | 227 | def normcase(path): |
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228 | 228 | ''' |
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229 | 229 | Normalize a filename for OS X-compatible comparison: |
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230 | 230 | - escape-encode invalid characters |
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231 | 231 | - decompose to NFD |
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232 | 232 | - lowercase |
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233 | 233 | - omit ignored characters [200c-200f, 202a-202e, 206a-206f,feff] |
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234 | 234 | |
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235 | 235 | >>> normcase('UPPER') |
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236 | 236 | 'upper' |
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237 | 237 | >>> normcase('Caf\xc3\xa9') |
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238 | 238 | 'cafe\\xcc\\x81' |
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239 | 239 | >>> normcase('\xc3\x89') |
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240 | 240 | 'e\\xcc\\x81' |
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241 | 241 | >>> normcase('\xb8\xca\xc3\xca\xbe\xc8.JPG') # issue3918 |
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242 | 242 | '%b8%ca%c3\\xca\\xbe%c8.jpg' |
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243 | 243 | ''' |
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244 | 244 | |
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245 | 245 | try: |
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246 | 246 | return encoding.asciilower(path) # exception for non-ASCII |
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247 | 247 | except UnicodeDecodeError: |
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248 | 248 | return normcasefallback(path) |
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249 | 249 | |
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250 | 250 | normcasespec = encoding.normcasespecs.lower |
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251 | 251 | |
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252 | 252 | def normcasefallback(path): |
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253 | 253 | try: |
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254 | 254 | u = path.decode('utf-8') |
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255 | 255 | except UnicodeDecodeError: |
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256 | 256 | # OS X percent-encodes any bytes that aren't valid utf-8 |
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257 | 257 | s = '' |
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258 |
|
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259 |
l = |
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260 |
|
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261 |
|
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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 |
|
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266 |
|
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|
267 | if l == 0 and o < 128: | |
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268 | # ascii | |
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258 | pos = 0 | |
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259 | l = len(s) | |
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260 | while pos < l: | |
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261 | try: | |
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262 | c = encoding.getutf8char(path, pos) | |
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263 | pos += len(c) | |
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264 | except ValueError: | |
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265 | c = '%%%%02X' % path[pos] | |
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266 | pos += 1 | |
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269 | 267 |
|
|
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 | 268 | |
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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 | 269 | u = s.decode('utf-8') |
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293 | 270 | |
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294 | 271 | # Decompose then lowercase (HFS+ technote specifies lower) |
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295 | 272 | enc = unicodedata.normalize('NFD', u).lower().encode('utf-8') |
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296 | 273 | # drop HFS+ ignored characters |
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297 | 274 | return encoding.hfsignoreclean(enc) |
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298 | 275 | |
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299 | 276 | if sys.platform == 'cygwin': |
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300 | 277 | # workaround for cygwin, in which mount point part of path is |
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301 | 278 | # treated as case sensitive, even though underlying NTFS is case |
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302 | 279 | # insensitive. |
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303 | 280 | |
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304 | 281 | # default mount points |
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305 | 282 | cygwinmountpoints = sorted([ |
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306 | 283 | "/usr/bin", |
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307 | 284 | "/usr/lib", |
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308 | 285 | "/cygdrive", |
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309 | 286 | ], reverse=True) |
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310 | 287 | |
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311 | 288 | # use upper-ing as normcase as same as NTFS workaround |
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312 | 289 | def normcase(path): |
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313 | 290 | pathlen = len(path) |
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314 | 291 | if (pathlen == 0) or (path[0] != os.sep): |
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315 | 292 | # treat as relative |
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316 | 293 | return encoding.upper(path) |
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317 | 294 | |
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318 | 295 | # to preserve case of mountpoint part |
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319 | 296 | for mp in cygwinmountpoints: |
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320 | 297 | if not path.startswith(mp): |
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321 | 298 | continue |
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322 | 299 | |
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323 | 300 | mplen = len(mp) |
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324 | 301 | if mplen == pathlen: # mount point itself |
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325 | 302 | return mp |
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326 | 303 | if path[mplen] == os.sep: |
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327 | 304 | return mp + encoding.upper(path[mplen:]) |
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328 | 305 | |
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329 | 306 | return encoding.upper(path) |
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330 | 307 | |
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331 | 308 | normcasespec = encoding.normcasespecs.other |
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332 | 309 | normcasefallback = normcase |
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333 | 310 | |
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334 | 311 | # Cygwin translates native ACLs to POSIX permissions, |
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335 | 312 | # but these translations are not supported by native |
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336 | 313 | # tools, so the exec bit tends to be set erroneously. |
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337 | 314 | # Therefore, disable executable bit access on Cygwin. |
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338 | 315 | def checkexec(path): |
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339 | 316 | return False |
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340 | 317 | |
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341 | 318 | # Similarly, Cygwin's symlink emulation is likely to create |
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342 | 319 | # problems when Mercurial is used from both Cygwin and native |
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343 | 320 | # Windows, with other native tools, or on shared volumes |
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344 | 321 | def checklink(path): |
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345 | 322 | return False |
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346 | 323 | |
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347 | 324 | _needsshellquote = None |
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348 | 325 | def shellquote(s): |
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349 | 326 | if os.sys.platform == 'OpenVMS': |
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350 | 327 | return '"%s"' % s |
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351 | 328 | global _needsshellquote |
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352 | 329 | if _needsshellquote is None: |
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353 | 330 | _needsshellquote = re.compile(r'[^a-zA-Z0-9._/+-]').search |
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354 | 331 | if s and not _needsshellquote(s): |
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355 | 332 | # "s" shouldn't have to be quoted |
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356 | 333 | return s |
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357 | 334 | else: |
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358 | 335 | return "'%s'" % s.replace("'", "'\\''") |
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359 | 336 | |
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360 | 337 | def quotecommand(cmd): |
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361 | 338 | return cmd |
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362 | 339 | |
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363 | 340 | def popen(command, mode='r'): |
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364 | 341 | return os.popen(command, mode) |
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365 | 342 | |
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366 | 343 | def testpid(pid): |
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367 | 344 | '''return False if pid dead, True if running or not sure''' |
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368 | 345 | if os.sys.platform == 'OpenVMS': |
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369 | 346 | return True |
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370 | 347 | try: |
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371 | 348 | os.kill(pid, 0) |
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372 | 349 | return True |
|
373 | 350 | except OSError as inst: |
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374 | 351 | return inst.errno != errno.ESRCH |
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375 | 352 | |
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376 | 353 | def explainexit(code): |
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377 | 354 | """return a 2-tuple (desc, code) describing a subprocess status |
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378 | 355 | (codes from kill are negative - not os.system/wait encoding)""" |
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379 | 356 | if code >= 0: |
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380 | 357 | return _("exited with status %d") % code, code |
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381 | 358 | return _("killed by signal %d") % -code, -code |
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382 | 359 | |
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383 | 360 | def isowner(st): |
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384 | 361 | """Return True if the stat object st is from the current user.""" |
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385 | 362 | return st.st_uid == os.getuid() |
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386 | 363 | |
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387 | 364 | def findexe(command): |
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388 | 365 | '''Find executable for command searching like which does. |
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389 | 366 | If command is a basename then PATH is searched for command. |
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390 | 367 | PATH isn't searched if command is an absolute or relative path. |
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391 | 368 | If command isn't found None is returned.''' |
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392 | 369 | if sys.platform == 'OpenVMS': |
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393 | 370 | return command |
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394 | 371 | |
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395 | 372 | def findexisting(executable): |
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396 | 373 | 'Will return executable if existing file' |
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397 | 374 | if os.path.isfile(executable) and os.access(executable, os.X_OK): |
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398 | 375 | return executable |
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399 | 376 | return None |
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400 | 377 | |
|
401 | 378 | if os.sep in command: |
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402 | 379 | return findexisting(command) |
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403 | 380 | |
|
404 | 381 | if sys.platform == 'plan9': |
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405 | 382 | return findexisting(os.path.join('/bin', command)) |
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406 | 383 | |
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407 | 384 | for path in os.environ.get('PATH', '').split(os.pathsep): |
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408 | 385 | executable = findexisting(os.path.join(path, command)) |
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409 | 386 | if executable is not None: |
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410 | 387 | return executable |
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411 | 388 | return None |
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412 | 389 | |
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413 | 390 | def setsignalhandler(): |
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414 | 391 | pass |
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415 | 392 | |
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416 | 393 | _wantedkinds = set([stat.S_IFREG, stat.S_IFLNK]) |
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417 | 394 | |
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418 | 395 | def statfiles(files): |
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419 | 396 | '''Stat each file in files. Yield each stat, or None if a file does not |
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420 | 397 | exist or has a type we don't care about.''' |
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421 | 398 | lstat = os.lstat |
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422 | 399 | getkind = stat.S_IFMT |
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423 | 400 | for nf in files: |
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424 | 401 | try: |
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425 | 402 | st = lstat(nf) |
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426 | 403 | if getkind(st.st_mode) not in _wantedkinds: |
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427 | 404 | st = None |
|
428 | 405 | except OSError as err: |
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429 | 406 | if err.errno not in (errno.ENOENT, errno.ENOTDIR): |
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430 | 407 | raise |
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431 | 408 | st = None |
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432 | 409 | yield st |
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433 | 410 | |
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434 | 411 | def getuser(): |
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435 | 412 | '''return name of current user''' |
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436 | 413 | return getpass.getuser() |
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437 | 414 | |
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438 | 415 | def username(uid=None): |
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439 | 416 | """Return the name of the user with the given uid. |
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440 | 417 | |
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441 | 418 | If uid is None, return the name of the current user.""" |
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442 | 419 | |
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443 | 420 | if uid is None: |
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444 | 421 | uid = os.getuid() |
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445 | 422 | try: |
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446 | 423 | return pwd.getpwuid(uid)[0] |
|
447 | 424 | except KeyError: |
|
448 | 425 | return str(uid) |
|
449 | 426 | |
|
450 | 427 | def groupname(gid=None): |
|
451 | 428 | """Return the name of the group with the given gid. |
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452 | 429 | |
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453 | 430 | If gid is None, return the name of the current group.""" |
|
454 | 431 | |
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455 | 432 | if gid is None: |
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456 | 433 | gid = os.getgid() |
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457 | 434 | try: |
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458 | 435 | return grp.getgrgid(gid)[0] |
|
459 | 436 | except KeyError: |
|
460 | 437 | return str(gid) |
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461 | 438 | |
|
462 | 439 | def groupmembers(name): |
|
463 | 440 | """Return the list of members of the group with the given |
|
464 | 441 | name, KeyError if the group does not exist. |
|
465 | 442 | """ |
|
466 | 443 | return list(grp.getgrnam(name).gr_mem) |
|
467 | 444 | |
|
468 | 445 | def spawndetached(args): |
|
469 | 446 | return os.spawnvp(os.P_NOWAIT | getattr(os, 'P_DETACH', 0), |
|
470 | 447 | args[0], args) |
|
471 | 448 | |
|
472 | 449 | def gethgcmd(): |
|
473 | 450 | return sys.argv[:1] |
|
474 | 451 | |
|
475 | 452 | def termwidth(): |
|
476 | 453 | try: |
|
477 | 454 | import array |
|
478 | 455 | import termios |
|
479 | 456 | for dev in (sys.stderr, sys.stdout, sys.stdin): |
|
480 | 457 | try: |
|
481 | 458 | try: |
|
482 | 459 | fd = dev.fileno() |
|
483 | 460 | except AttributeError: |
|
484 | 461 | continue |
|
485 | 462 | if not os.isatty(fd): |
|
486 | 463 | continue |
|
487 | 464 | try: |
|
488 | 465 | arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8) |
|
489 | 466 | width = array.array('h', arri)[1] |
|
490 | 467 | if width > 0: |
|
491 | 468 | return width |
|
492 | 469 | except AttributeError: |
|
493 | 470 | pass |
|
494 | 471 | except ValueError: |
|
495 | 472 | pass |
|
496 | 473 | except IOError as e: |
|
497 | 474 | if e[0] == errno.EINVAL: |
|
498 | 475 | pass |
|
499 | 476 | else: |
|
500 | 477 | raise |
|
501 | 478 | except ImportError: |
|
502 | 479 | pass |
|
503 | 480 | return 80 |
|
504 | 481 | |
|
505 | 482 | def makedir(path, notindexed): |
|
506 | 483 | os.mkdir(path) |
|
507 | 484 | |
|
508 | 485 | def unlinkpath(f, ignoremissing=False): |
|
509 | 486 | """unlink and remove the directory if it is empty""" |
|
510 | 487 | try: |
|
511 | 488 | os.unlink(f) |
|
512 | 489 | except OSError as e: |
|
513 | 490 | if not (ignoremissing and e.errno == errno.ENOENT): |
|
514 | 491 | raise |
|
515 | 492 | # try removing directories that might now be empty |
|
516 | 493 | try: |
|
517 | 494 | os.removedirs(os.path.dirname(f)) |
|
518 | 495 | except OSError: |
|
519 | 496 | pass |
|
520 | 497 | |
|
521 | 498 | def lookupreg(key, name=None, scope=None): |
|
522 | 499 | return None |
|
523 | 500 | |
|
524 | 501 | def hidewindow(): |
|
525 | 502 | """Hide current shell window. |
|
526 | 503 | |
|
527 | 504 | Used to hide the window opened when starting asynchronous |
|
528 | 505 | child process under Windows, unneeded on other systems. |
|
529 | 506 | """ |
|
530 | 507 | pass |
|
531 | 508 | |
|
532 | 509 | class cachestat(object): |
|
533 | 510 | def __init__(self, path): |
|
534 | 511 | self.stat = os.stat(path) |
|
535 | 512 | |
|
536 | 513 | def cacheable(self): |
|
537 | 514 | return bool(self.stat.st_ino) |
|
538 | 515 | |
|
539 | 516 | __hash__ = object.__hash__ |
|
540 | 517 | |
|
541 | 518 | def __eq__(self, other): |
|
542 | 519 | try: |
|
543 | 520 | # Only dev, ino, size, mtime and atime are likely to change. Out |
|
544 | 521 | # of these, we shouldn't compare atime but should compare the |
|
545 | 522 | # rest. However, one of the other fields changing indicates |
|
546 | 523 | # something fishy going on, so return False if anything but atime |
|
547 | 524 | # changes. |
|
548 | 525 | return (self.stat.st_mode == other.stat.st_mode and |
|
549 | 526 | self.stat.st_ino == other.stat.st_ino and |
|
550 | 527 | self.stat.st_dev == other.stat.st_dev and |
|
551 | 528 | self.stat.st_nlink == other.stat.st_nlink and |
|
552 | 529 | self.stat.st_uid == other.stat.st_uid and |
|
553 | 530 | self.stat.st_gid == other.stat.st_gid and |
|
554 | 531 | self.stat.st_size == other.stat.st_size and |
|
555 | 532 | self.stat.st_mtime == other.stat.st_mtime and |
|
556 | 533 | self.stat.st_ctime == other.stat.st_ctime) |
|
557 | 534 | except AttributeError: |
|
558 | 535 | return False |
|
559 | 536 | |
|
560 | 537 | def __ne__(self, other): |
|
561 | 538 | return not self == other |
|
562 | 539 | |
|
563 | 540 | def executablepath(): |
|
564 | 541 | return None # available on Windows only |
|
565 | 542 | |
|
566 | 543 | class unixdomainserver(socket.socket): |
|
567 | 544 | def __init__(self, join, subsystem): |
|
568 | 545 | '''Create a unix domain socket with the given prefix.''' |
|
569 | 546 | super(unixdomainserver, self).__init__(socket.AF_UNIX) |
|
570 | 547 | sockname = subsystem + '.sock' |
|
571 | 548 | self.realpath = self.path = join(sockname) |
|
572 | 549 | if os.path.islink(self.path): |
|
573 | 550 | if os.path.exists(self.path): |
|
574 | 551 | self.realpath = os.readlink(self.path) |
|
575 | 552 | else: |
|
576 | 553 | os.unlink(self.path) |
|
577 | 554 | try: |
|
578 | 555 | self.bind(self.realpath) |
|
579 | 556 | except socket.error as err: |
|
580 | 557 | if err.args[0] == 'AF_UNIX path too long': |
|
581 | 558 | tmpdir = tempfile.mkdtemp(prefix='hg-%s-' % subsystem) |
|
582 | 559 | self.realpath = os.path.join(tmpdir, sockname) |
|
583 | 560 | try: |
|
584 | 561 | self.bind(self.realpath) |
|
585 | 562 | os.symlink(self.realpath, self.path) |
|
586 | 563 | except (OSError, socket.error): |
|
587 | 564 | self.cleanup() |
|
588 | 565 | raise |
|
589 | 566 | else: |
|
590 | 567 | raise |
|
591 | 568 | self.listen(5) |
|
592 | 569 | |
|
593 | 570 | def cleanup(self): |
|
594 | 571 | def okayifmissing(f, path): |
|
595 | 572 | try: |
|
596 | 573 | f(path) |
|
597 | 574 | except OSError as err: |
|
598 | 575 | if err.errno != errno.ENOENT: |
|
599 | 576 | raise |
|
600 | 577 | |
|
601 | 578 | okayifmissing(os.unlink, self.path) |
|
602 | 579 | if self.realpath != self.path: |
|
603 | 580 | okayifmissing(os.unlink, self.realpath) |
|
604 | 581 | okayifmissing(os.rmdir, os.path.dirname(self.realpath)) |
|
605 | 582 | |
|
606 | 583 | def statislink(st): |
|
607 | 584 | '''check whether a stat result is a symlink''' |
|
608 | 585 | return st and stat.S_ISLNK(st.st_mode) |
|
609 | 586 | |
|
610 | 587 | def statisexec(st): |
|
611 | 588 | '''check whether a stat result is an executable file''' |
|
612 | 589 | return st and (st.st_mode & 0o100 != 0) |
|
613 | 590 | |
|
614 | 591 | def poll(fds): |
|
615 | 592 | """block until something happens on any file descriptor |
|
616 | 593 | |
|
617 | 594 | This is a generic helper that will check for any activity |
|
618 | 595 | (read, write. exception) and return the list of touched files. |
|
619 | 596 | |
|
620 | 597 | In unsupported cases, it will raise a NotImplementedError""" |
|
621 | 598 | try: |
|
622 | 599 | res = select.select(fds, fds, fds) |
|
623 | 600 | except ValueError: # out of range file descriptor |
|
624 | 601 | raise NotImplementedError() |
|
625 | 602 | return sorted(list(set(sum(res, [])))) |
|
626 | 603 | |
|
627 | 604 | def readpipe(pipe): |
|
628 | 605 | """Read all available data from a pipe.""" |
|
629 | 606 | # We can't fstat() a pipe because Linux will always report 0. |
|
630 | 607 | # So, we set the pipe to non-blocking mode and read everything |
|
631 | 608 | # that's available. |
|
632 | 609 | flags = fcntl.fcntl(pipe, fcntl.F_GETFL) |
|
633 | 610 | flags |= os.O_NONBLOCK |
|
634 | 611 | oldflags = fcntl.fcntl(pipe, fcntl.F_SETFL, flags) |
|
635 | 612 | |
|
636 | 613 | try: |
|
637 | 614 | chunks = [] |
|
638 | 615 | while True: |
|
639 | 616 | try: |
|
640 | 617 | s = pipe.read() |
|
641 | 618 | if not s: |
|
642 | 619 | break |
|
643 | 620 | chunks.append(s) |
|
644 | 621 | except IOError: |
|
645 | 622 | break |
|
646 | 623 | |
|
647 | 624 | return ''.join(chunks) |
|
648 | 625 | finally: |
|
649 | 626 | fcntl.fcntl(pipe, fcntl.F_SETFL, oldflags) |
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