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@@ -1,706 +1,706 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 stat |
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19 | 19 | import sys |
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20 | 20 | import tempfile |
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21 | 21 | import unicodedata |
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22 | 22 | |
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23 | 23 | from .i18n import _ |
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24 | 24 | from . import ( |
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25 | 25 | encoding, |
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26 | 26 | error, |
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27 | 27 | policy, |
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28 | 28 | pycompat, |
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29 | 29 | ) |
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30 | 30 | |
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31 | 31 | osutil = policy.importmod(r'osutil') |
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32 | 32 | |
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33 | 33 | posixfile = open |
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34 | 34 | normpath = os.path.normpath |
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35 | 35 | samestat = os.path.samestat |
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36 | 36 | try: |
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37 | 37 | oslink = os.link |
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38 | 38 | except AttributeError: |
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39 | 39 | # Some platforms build Python without os.link on systems that are |
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40 | 40 | # vaguely unix-like but don't have hardlink support. For those |
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41 | 41 | # poor souls, just say we tried and that it failed so we fall back |
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42 | 42 | # to copies. |
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43 | 43 | def oslink(src, dst): |
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44 | 44 | raise OSError(errno.EINVAL, |
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45 | 45 | 'hardlinks not supported: %s to %s' % (src, dst)) |
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46 | 46 | readlink = os.readlink |
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47 | 47 | unlink = os.unlink |
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48 | 48 | rename = os.rename |
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49 | 49 | removedirs = os.removedirs |
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50 | 50 | expandglobs = False |
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51 | 51 | |
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52 | 52 | umask = os.umask(0) |
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53 | 53 | os.umask(umask) |
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54 | 54 | |
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55 | 55 | def split(p): |
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56 | 56 | '''Same as posixpath.split, but faster |
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57 | 57 | |
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58 | 58 | >>> import posixpath |
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59 | 59 | >>> for f in [b'/absolute/path/to/file', |
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60 | 60 | ... b'relative/path/to/file', |
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61 | 61 | ... b'file_alone', |
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62 | 62 | ... b'path/to/directory/', |
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63 | 63 | ... b'/multiple/path//separators', |
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64 | 64 | ... b'/file_at_root', |
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65 | 65 | ... b'///multiple_leading_separators_at_root', |
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66 | 66 | ... b'']: |
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67 | 67 | ... assert split(f) == posixpath.split(f), f |
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68 | 68 | ''' |
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69 | 69 | ht = p.rsplit('/', 1) |
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70 | 70 | if len(ht) == 1: |
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71 | 71 | return '', p |
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72 | 72 | nh = ht[0].rstrip('/') |
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73 | 73 | if nh: |
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74 | 74 | return nh, ht[1] |
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75 | 75 | return ht[0] + '/', ht[1] |
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76 | 76 | |
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77 | 77 | def openhardlinks(): |
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78 | 78 | '''return true if it is safe to hold open file handles to hardlinks''' |
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79 | 79 | return True |
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80 | 80 | |
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81 | 81 | def nlinks(name): |
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82 | 82 | '''return number of hardlinks for the given file''' |
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83 | 83 | return os.lstat(name).st_nlink |
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84 | 84 | |
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85 | 85 | def parsepatchoutput(output_line): |
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86 | 86 | """parses the output produced by patch and returns the filename""" |
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87 | 87 | pf = output_line[14:] |
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88 | 88 | if pycompat.sysplatform == 'OpenVMS': |
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89 | 89 | if pf[0] == '`': |
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90 | 90 | pf = pf[1:-1] # Remove the quotes |
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91 | 91 | else: |
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92 | 92 | if pf.startswith("'") and pf.endswith("'") and " " in pf: |
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93 | 93 | pf = pf[1:-1] # Remove the quotes |
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94 | 94 | return pf |
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95 | 95 | |
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96 | 96 | def sshargs(sshcmd, host, user, port): |
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97 | 97 | '''Build argument list for ssh''' |
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98 | 98 | args = user and ("%s@%s" % (user, host)) or host |
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99 | 99 | if '-' in args[:1]: |
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100 | 100 | raise error.Abort( |
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101 | 101 | _('illegal ssh hostname or username starting with -: %s') % args) |
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102 | 102 | args = shellquote(args) |
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103 | 103 | if port: |
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104 | 104 | args = '-p %s %s' % (shellquote(port), args) |
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105 | 105 | return args |
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106 | 106 | |
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107 | 107 | def isexec(f): |
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108 | 108 | """check whether a file is executable""" |
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109 | 109 | return (os.lstat(f).st_mode & 0o100 != 0) |
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110 | 110 | |
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111 | 111 | def setflags(f, l, x): |
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112 | 112 | st = os.lstat(f) |
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113 | 113 | s = st.st_mode |
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114 | 114 | if l: |
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115 | 115 | if not stat.S_ISLNK(s): |
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116 | 116 | # switch file to link |
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117 | 117 | fp = open(f, 'rb') |
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118 | 118 | data = fp.read() |
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119 | 119 | fp.close() |
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120 | 120 | unlink(f) |
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121 | 121 | try: |
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122 | 122 | os.symlink(data, f) |
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123 | 123 | except OSError: |
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124 | 124 | # failed to make a link, rewrite file |
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125 | 125 | fp = open(f, "wb") |
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126 | 126 | fp.write(data) |
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127 | 127 | fp.close() |
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128 | 128 | # no chmod needed at this point |
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129 | 129 | return |
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130 | 130 | if stat.S_ISLNK(s): |
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131 | 131 | # switch link to file |
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132 | 132 | data = os.readlink(f) |
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133 | 133 | unlink(f) |
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134 | 134 | fp = open(f, "wb") |
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135 | 135 | fp.write(data) |
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136 | 136 | fp.close() |
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137 | 137 | s = 0o666 & ~umask # avoid restatting for chmod |
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138 | 138 | |
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139 | 139 | sx = s & 0o100 |
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140 | 140 | if st.st_nlink > 1 and bool(x) != bool(sx): |
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141 | 141 | # the file is a hardlink, break it |
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142 | 142 | with open(f, "rb") as fp: |
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143 | 143 | data = fp.read() |
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144 | 144 | unlink(f) |
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145 | 145 | with open(f, "wb") as fp: |
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146 | 146 | fp.write(data) |
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147 | 147 | |
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148 | 148 | if x and not sx: |
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149 | 149 | # Turn on +x for every +r bit when making a file executable |
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150 | 150 | # and obey umask. |
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151 | 151 | os.chmod(f, s | (s & 0o444) >> 2 & ~umask) |
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152 | 152 | elif not x and sx: |
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153 | 153 | # Turn off all +x bits |
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154 | 154 | os.chmod(f, s & 0o666) |
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155 | 155 | |
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156 | 156 | def copymode(src, dst, mode=None, enforcewritable=False): |
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157 | 157 | '''Copy the file mode from the file at path src to dst. |
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158 | 158 | If src doesn't exist, we're using mode instead. If mode is None, we're |
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159 | 159 | using umask.''' |
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160 | 160 | try: |
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161 | 161 | st_mode = os.lstat(src).st_mode & 0o777 |
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162 | 162 | except OSError as inst: |
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163 | 163 | if inst.errno != errno.ENOENT: |
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164 | 164 | raise |
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165 | 165 | st_mode = mode |
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166 | 166 | if st_mode is None: |
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167 | 167 | st_mode = ~umask |
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168 | 168 | st_mode &= 0o666 |
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169 | 169 | |
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170 | 170 | new_mode = st_mode |
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171 | 171 | |
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172 | 172 | if enforcewritable: |
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173 | 173 | new_mode |= stat.S_IWUSR |
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174 | 174 | |
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175 | 175 | os.chmod(dst, new_mode) |
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176 | 176 | |
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177 | 177 | def checkexec(path): |
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178 | 178 | """ |
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179 | 179 | Check whether the given path is on a filesystem with UNIX-like exec flags |
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180 | 180 | |
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181 | 181 | Requires a directory (like /foo/.hg) |
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182 | 182 | """ |
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183 | 183 | |
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184 | 184 | # VFAT on some Linux versions can flip mode but it doesn't persist |
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185 | 185 | # a FS remount. Frequently we can detect it if files are created |
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186 | 186 | # with exec bit on. |
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187 | 187 | |
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188 | 188 | try: |
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189 | 189 | EXECFLAGS = stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH |
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190 | 190 | basedir = os.path.join(path, '.hg') |
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191 | 191 | cachedir = os.path.join(basedir, 'wcache') |
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192 | 192 | storedir = os.path.join(basedir, 'store') |
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193 | 193 | if not os.path.exists(cachedir): |
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194 | 194 | try: |
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195 | 195 | # we want to create the 'cache' directory, not the '.hg' one. |
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196 | 196 | # Automatically creating '.hg' directory could silently spawn |
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197 | 197 | # invalid Mercurial repositories. That seems like a bad idea. |
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198 | 198 | os.mkdir(cachedir) |
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199 | 199 | if os.path.exists(storedir): |
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200 | 200 | copymode(storedir, cachedir) |
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201 | 201 | else: |
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202 | 202 | copymode(basedir, cachedir) |
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203 | 203 | except (IOError, OSError): |
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204 | 204 | # we other fallback logic triggers |
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205 | 205 | pass |
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206 | 206 | if os.path.isdir(cachedir): |
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207 | 207 | checkisexec = os.path.join(cachedir, 'checkisexec') |
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208 | 208 | checknoexec = os.path.join(cachedir, 'checknoexec') |
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209 | 209 | |
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210 | 210 | try: |
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211 | 211 | m = os.stat(checkisexec).st_mode |
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212 | 212 | except OSError as e: |
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213 | 213 | if e.errno != errno.ENOENT: |
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214 | 214 | raise |
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215 | 215 | # checkisexec does not exist - fall through ... |
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216 | 216 | else: |
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217 | 217 | # checkisexec exists, check if it actually is exec |
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218 | 218 | if m & EXECFLAGS != 0: |
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219 | 219 | # ensure checkisexec exists, check it isn't exec |
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220 | 220 | try: |
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221 | 221 | m = os.stat(checknoexec).st_mode |
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222 | 222 | except OSError as e: |
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223 | 223 | if e.errno != errno.ENOENT: |
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224 | 224 | raise |
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225 | 225 | open(checknoexec, 'w').close() # might fail |
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226 | 226 | m = os.stat(checknoexec).st_mode |
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227 | 227 | if m & EXECFLAGS == 0: |
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228 | 228 | # check-exec is exec and check-no-exec is not exec |
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229 | 229 | return True |
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230 | 230 | # checknoexec exists but is exec - delete it |
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231 | 231 | unlink(checknoexec) |
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232 | 232 | # checkisexec exists but is not exec - delete it |
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233 | 233 | unlink(checkisexec) |
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234 | 234 | |
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235 | 235 | # check using one file, leave it as checkisexec |
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236 | 236 | checkdir = cachedir |
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237 | 237 | else: |
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238 | 238 | # check directly in path and don't leave checkisexec behind |
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239 | 239 | checkdir = path |
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240 | 240 | checkisexec = None |
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241 | 241 | fh, fn = pycompat.mkstemp(dir=checkdir, prefix='hg-checkexec-') |
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242 | 242 | try: |
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243 | 243 | os.close(fh) |
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244 | 244 | m = os.stat(fn).st_mode |
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245 | 245 | if m & EXECFLAGS == 0: |
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246 | 246 | os.chmod(fn, m & 0o777 | EXECFLAGS) |
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247 | 247 | if os.stat(fn).st_mode & EXECFLAGS != 0: |
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248 | 248 | if checkisexec is not None: |
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249 | 249 | os.rename(fn, checkisexec) |
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250 | 250 | fn = None |
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251 | 251 | return True |
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252 | 252 | finally: |
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253 | 253 | if fn is not None: |
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254 | 254 | unlink(fn) |
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255 | 255 | except (IOError, OSError): |
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256 | 256 | # we don't care, the user probably won't be able to commit anyway |
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257 | 257 | return False |
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258 | 258 | |
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259 | 259 | def checklink(path): |
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260 | 260 | """check whether the given path is on a symlink-capable filesystem""" |
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261 | 261 | # mktemp is not racy because symlink creation will fail if the |
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262 | 262 | # file already exists |
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263 | 263 | while True: |
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264 | 264 | cachedir = os.path.join(path, '.hg', 'wcache') |
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265 | 265 | checklink = os.path.join(cachedir, 'checklink') |
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266 | 266 | # try fast path, read only |
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267 | 267 | if os.path.islink(checklink): |
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268 | 268 | return True |
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269 | 269 | if os.path.isdir(cachedir): |
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270 | 270 | checkdir = cachedir |
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271 | 271 | else: |
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272 | 272 | checkdir = path |
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273 | 273 | cachedir = None |
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274 | 274 | name = tempfile.mktemp(dir=pycompat.fsdecode(checkdir), |
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275 | 275 | prefix=r'checklink-') |
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276 | 276 | name = pycompat.fsencode(name) |
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277 | 277 | try: |
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278 | 278 | fd = None |
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279 | 279 | if cachedir is None: |
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280 | 280 | fd = pycompat.namedtempfile(dir=checkdir, |
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281 | 281 | prefix='hg-checklink-') |
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282 | 282 | target = os.path.basename(fd.name) |
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283 | 283 | else: |
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284 | 284 | # create a fixed file to link to; doesn't matter if it |
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285 | 285 | # already exists. |
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286 | 286 | target = 'checklink-target' |
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287 | 287 | try: |
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288 | 288 | fullpath = os.path.join(cachedir, target) |
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289 | 289 | open(fullpath, 'w').close() |
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290 | 290 | except IOError as inst: |
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291 | 291 | if inst[0] == errno.EACCES: |
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292 | 292 | # If we can't write to cachedir, just pretend |
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293 | 293 | # that the fs is readonly and by association |
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294 | 294 | # that the fs won't support symlinks. This |
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295 | 295 | # seems like the least dangerous way to avoid |
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296 | 296 | # data loss. |
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297 | 297 | return False |
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298 | 298 | raise |
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299 | 299 | try: |
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300 | 300 | os.symlink(target, name) |
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301 | 301 | if cachedir is None: |
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302 | 302 | unlink(name) |
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303 | 303 | else: |
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304 | 304 | try: |
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305 | 305 | os.rename(name, checklink) |
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306 | 306 | except OSError: |
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307 | 307 | unlink(name) |
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308 | 308 | return True |
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309 | 309 | except OSError as inst: |
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310 | 310 | # link creation might race, try again |
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311 | 311 | if inst.errno == errno.EEXIST: |
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312 | 312 | continue |
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313 | 313 | raise |
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314 | 314 | finally: |
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315 | 315 | if fd is not None: |
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316 | 316 | fd.close() |
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317 | 317 | except AttributeError: |
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318 | 318 | return False |
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319 | 319 | except OSError as inst: |
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320 | 320 | # sshfs might report failure while successfully creating the link |
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321 | 321 | if inst.errno == errno.EIO and os.path.exists(name): |
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322 | 322 | unlink(name) |
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323 | 323 | return False |
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324 | 324 | |
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325 | 325 | def checkosfilename(path): |
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326 | 326 | '''Check that the base-relative path is a valid filename on this platform. |
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327 | 327 | Returns None if the path is ok, or a UI string describing the problem.''' |
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328 | 328 | return None # on posix platforms, every path is ok |
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329 | 329 | |
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330 | 330 | def getfsmountpoint(dirpath): |
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331 | 331 | '''Get the filesystem mount point from a directory (best-effort) |
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332 | 332 | |
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333 | 333 | Returns None if we are unsure. Raises OSError on ENOENT, EPERM, etc. |
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334 | 334 | ''' |
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335 | 335 | return getattr(osutil, 'getfsmountpoint', lambda x: None)(dirpath) |
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336 | 336 | |
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337 | 337 | def getfstype(dirpath): |
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338 | 338 | '''Get the filesystem type name from a directory (best-effort) |
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339 | 339 | |
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340 | 340 | Returns None if we are unsure. Raises OSError on ENOENT, EPERM, etc. |
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341 | 341 | ''' |
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342 | 342 | return getattr(osutil, 'getfstype', lambda x: None)(dirpath) |
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343 | 343 | |
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344 | 344 | def setbinary(fd): |
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345 | 345 | pass |
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346 | 346 | |
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347 | 347 | def pconvert(path): |
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348 | 348 | return path |
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349 | 349 | |
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350 | 350 | def localpath(path): |
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351 | 351 | return path |
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352 | 352 | |
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353 | 353 | def samefile(fpath1, fpath2): |
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354 | 354 | """Returns whether path1 and path2 refer to the same file. This is only |
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355 | 355 | guaranteed to work for files, not directories.""" |
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356 | 356 | return os.path.samefile(fpath1, fpath2) |
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357 | 357 | |
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358 | 358 | def samedevice(fpath1, fpath2): |
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359 | 359 | """Returns whether fpath1 and fpath2 are on the same device. This is only |
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360 | 360 | guaranteed to work for files, not directories.""" |
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361 | 361 | st1 = os.lstat(fpath1) |
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362 | 362 | st2 = os.lstat(fpath2) |
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363 | 363 | return st1.st_dev == st2.st_dev |
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364 | 364 | |
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365 | 365 | # os.path.normcase is a no-op, which doesn't help us on non-native filesystems |
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366 | 366 | def normcase(path): |
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367 | 367 | return path.lower() |
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368 | 368 | |
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369 | 369 | # what normcase does to ASCII strings |
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370 | 370 | normcasespec = encoding.normcasespecs.lower |
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371 | 371 | # fallback normcase function for non-ASCII strings |
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372 | 372 | normcasefallback = normcase |
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373 | 373 | |
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374 | 374 | if pycompat.isdarwin: |
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375 | 375 | |
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376 | 376 | def normcase(path): |
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377 | 377 | ''' |
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378 | 378 | Normalize a filename for OS X-compatible comparison: |
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379 | 379 | - escape-encode invalid characters |
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380 | 380 | - decompose to NFD |
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381 | 381 | - lowercase |
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382 | 382 | - omit ignored characters [200c-200f, 202a-202e, 206a-206f,feff] |
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383 | 383 | |
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384 | 384 | >>> normcase(b'UPPER') |
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385 | 385 | 'upper' |
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386 | 386 | >>> normcase(b'Caf\\xc3\\xa9') |
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387 | 387 | 'cafe\\xcc\\x81' |
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388 | 388 | >>> normcase(b'\\xc3\\x89') |
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389 | 389 | 'e\\xcc\\x81' |
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390 | 390 | >>> normcase(b'\\xb8\\xca\\xc3\\xca\\xbe\\xc8.JPG') # issue3918 |
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391 | 391 | '%b8%ca%c3\\xca\\xbe%c8.jpg' |
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392 | 392 | ''' |
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393 | 393 | |
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394 | 394 | try: |
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395 | 395 | return encoding.asciilower(path) # exception for non-ASCII |
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396 | 396 | except UnicodeDecodeError: |
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397 | 397 | return normcasefallback(path) |
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398 | 398 | |
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399 | 399 | normcasespec = encoding.normcasespecs.lower |
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400 | 400 | |
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401 | 401 | def normcasefallback(path): |
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402 | 402 | try: |
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403 | 403 | u = path.decode('utf-8') |
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404 | 404 | except UnicodeDecodeError: |
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405 | 405 | # OS X percent-encodes any bytes that aren't valid utf-8 |
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406 | 406 | s = '' |
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407 | 407 | pos = 0 |
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408 | 408 | l = len(path) |
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409 | 409 | while pos < l: |
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410 | 410 | try: |
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411 | 411 | c = encoding.getutf8char(path, pos) |
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412 | 412 | pos += len(c) |
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413 | 413 | except ValueError: |
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414 | 414 | c = '%%%02X' % ord(path[pos:pos + 1]) |
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415 | 415 | pos += 1 |
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416 | 416 | s += c |
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417 | 417 | |
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418 | 418 | u = s.decode('utf-8') |
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419 | 419 | |
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420 | 420 | # Decompose then lowercase (HFS+ technote specifies lower) |
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421 | 421 | enc = unicodedata.normalize(r'NFD', u).lower().encode('utf-8') |
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422 | 422 | # drop HFS+ ignored characters |
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423 | 423 | return encoding.hfsignoreclean(enc) |
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424 | 424 | |
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425 | 425 | if pycompat.sysplatform == 'cygwin': |
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426 | 426 | # workaround for cygwin, in which mount point part of path is |
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427 | 427 | # treated as case sensitive, even though underlying NTFS is case |
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428 | 428 | # insensitive. |
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429 | 429 | |
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430 | 430 | # default mount points |
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431 | 431 | cygwinmountpoints = sorted([ |
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432 | 432 | "/usr/bin", |
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433 | 433 | "/usr/lib", |
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434 | 434 | "/cygdrive", |
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435 | 435 | ], reverse=True) |
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436 | 436 | |
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437 | 437 | # use upper-ing as normcase as same as NTFS workaround |
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438 | 438 | def normcase(path): |
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439 | 439 | pathlen = len(path) |
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440 | 440 | if (pathlen == 0) or (path[0] != pycompat.ossep): |
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441 | 441 | # treat as relative |
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442 | 442 | return encoding.upper(path) |
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443 | 443 | |
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444 | 444 | # to preserve case of mountpoint part |
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445 | 445 | for mp in cygwinmountpoints: |
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446 | 446 | if not path.startswith(mp): |
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447 | 447 | continue |
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448 | 448 | |
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449 | 449 | mplen = len(mp) |
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450 | 450 | if mplen == pathlen: # mount point itself |
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451 | 451 | return mp |
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452 | 452 | if path[mplen] == pycompat.ossep: |
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453 | 453 | return mp + encoding.upper(path[mplen:]) |
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454 | 454 | |
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455 | 455 | return encoding.upper(path) |
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456 | 456 | |
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457 | 457 | normcasespec = encoding.normcasespecs.other |
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458 | 458 | normcasefallback = normcase |
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459 | 459 | |
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460 | 460 | # Cygwin translates native ACLs to POSIX permissions, |
|
461 | 461 | # but these translations are not supported by native |
|
462 | 462 | # tools, so the exec bit tends to be set erroneously. |
|
463 | 463 | # Therefore, disable executable bit access on Cygwin. |
|
464 | 464 | def checkexec(path): |
|
465 | 465 | return False |
|
466 | 466 | |
|
467 | 467 | # Similarly, Cygwin's symlink emulation is likely to create |
|
468 | 468 | # problems when Mercurial is used from both Cygwin and native |
|
469 | 469 | # Windows, with other native tools, or on shared volumes |
|
470 | 470 | def checklink(path): |
|
471 | 471 | return False |
|
472 | 472 | |
|
473 | 473 | _needsshellquote = None |
|
474 | 474 | def shellquote(s): |
|
475 | 475 | if pycompat.sysplatform == 'OpenVMS': |
|
476 | 476 | return '"%s"' % s |
|
477 | 477 | global _needsshellquote |
|
478 | 478 | if _needsshellquote is None: |
|
479 | 479 | _needsshellquote = re.compile(br'[^a-zA-Z0-9._/+-]').search |
|
480 | 480 | if s and not _needsshellquote(s): |
|
481 | 481 | # "s" shouldn't have to be quoted |
|
482 | 482 | return s |
|
483 | 483 | else: |
|
484 | 484 | return "'%s'" % s.replace("'", "'\\''") |
|
485 | 485 | |
|
486 | 486 | def shellsplit(s): |
|
487 | 487 | """Parse a command string in POSIX shell way (best-effort)""" |
|
488 | 488 | return pycompat.shlexsplit(s, posix=True) |
|
489 | 489 | |
|
490 | 490 | def quotecommand(cmd): |
|
491 | 491 | return cmd |
|
492 | 492 | |
|
493 | 493 | def testpid(pid): |
|
494 | 494 | '''return False if pid dead, True if running or not sure''' |
|
495 | 495 | if pycompat.sysplatform == 'OpenVMS': |
|
496 | 496 | return True |
|
497 | 497 | try: |
|
498 | 498 | os.kill(pid, 0) |
|
499 | 499 | return True |
|
500 | 500 | except OSError as inst: |
|
501 | 501 | return inst.errno != errno.ESRCH |
|
502 | 502 | |
|
503 | 503 | def isowner(st): |
|
504 | 504 | """Return True if the stat object st is from the current user.""" |
|
505 | 505 | return st.st_uid == os.getuid() |
|
506 | 506 | |
|
507 | 507 | def findexe(command): |
|
508 | 508 | '''Find executable for command searching like which does. |
|
509 | 509 | If command is a basename then PATH is searched for command. |
|
510 | 510 | PATH isn't searched if command is an absolute or relative path. |
|
511 | 511 | If command isn't found None is returned.''' |
|
512 | 512 | if pycompat.sysplatform == 'OpenVMS': |
|
513 | 513 | return command |
|
514 | 514 | |
|
515 | 515 | def findexisting(executable): |
|
516 | 516 | 'Will return executable if existing file' |
|
517 | 517 | if os.path.isfile(executable) and os.access(executable, os.X_OK): |
|
518 | 518 | return executable |
|
519 | 519 | return None |
|
520 | 520 | |
|
521 | 521 | if pycompat.ossep in command: |
|
522 | 522 | return findexisting(command) |
|
523 | 523 | |
|
524 | 524 | if pycompat.sysplatform == 'plan9': |
|
525 | 525 | return findexisting(os.path.join('/bin', command)) |
|
526 | 526 | |
|
527 | 527 | for path in encoding.environ.get('PATH', '').split(pycompat.ospathsep): |
|
528 | 528 | executable = findexisting(os.path.join(path, command)) |
|
529 | 529 | if executable is not None: |
|
530 | 530 | return executable |
|
531 | 531 | return None |
|
532 | 532 | |
|
533 | 533 | def setsignalhandler(): |
|
534 | 534 | pass |
|
535 | 535 | |
|
536 | 536 | _wantedkinds = {stat.S_IFREG, stat.S_IFLNK} |
|
537 | 537 | |
|
538 | 538 | def statfiles(files): |
|
539 | 539 | '''Stat each file in files. Yield each stat, or None if a file does not |
|
540 | 540 | exist or has a type we don't care about.''' |
|
541 | 541 | lstat = os.lstat |
|
542 | 542 | getkind = stat.S_IFMT |
|
543 | 543 | for nf in files: |
|
544 | 544 | try: |
|
545 | 545 | st = lstat(nf) |
|
546 | 546 | if getkind(st.st_mode) not in _wantedkinds: |
|
547 | 547 | st = None |
|
548 | 548 | except OSError as err: |
|
549 | 549 | if err.errno not in (errno.ENOENT, errno.ENOTDIR): |
|
550 | 550 | raise |
|
551 | 551 | st = None |
|
552 | 552 | yield st |
|
553 | 553 | |
|
554 | 554 | def getuser(): |
|
555 | 555 | '''return name of current user''' |
|
556 | 556 | return pycompat.fsencode(getpass.getuser()) |
|
557 | 557 | |
|
558 | 558 | def username(uid=None): |
|
559 | 559 | """Return the name of the user with the given uid. |
|
560 | 560 | |
|
561 | 561 | If uid is None, return the name of the current user.""" |
|
562 | 562 | |
|
563 | 563 | if uid is None: |
|
564 | 564 | uid = os.getuid() |
|
565 | 565 | try: |
|
566 | 566 | return pycompat.fsencode(pwd.getpwuid(uid)[0]) |
|
567 | 567 | except KeyError: |
|
568 | 568 | return b'%d' % uid |
|
569 | 569 | |
|
570 | 570 | def groupname(gid=None): |
|
571 | 571 | """Return the name of the group with the given gid. |
|
572 | 572 | |
|
573 | 573 | If gid is None, return the name of the current group.""" |
|
574 | 574 | |
|
575 | 575 | if gid is None: |
|
576 | 576 | gid = os.getgid() |
|
577 | 577 | try: |
|
578 | 578 | return grp.getgrgid(gid)[0] |
|
579 | 579 | except KeyError: |
|
580 | 580 | return str(gid) |
|
581 | 581 | |
|
582 | 582 | def groupmembers(name): |
|
583 | 583 | """Return the list of members of the group with the given |
|
584 | 584 | name, KeyError if the group does not exist. |
|
585 | 585 | """ |
|
586 |
name = pycompat. |
|
|
587 | return list(grp.getgrnam(name).gr_mem) | |
|
586 | name = pycompat.fsdecode(name) | |
|
587 | return pycompat.rapply(pycompat.fsencode, list(grp.getgrnam(name).gr_mem)) | |
|
588 | 588 | |
|
589 | 589 | def spawndetached(args): |
|
590 | 590 | return os.spawnvp(os.P_NOWAIT | getattr(os, 'P_DETACH', 0), |
|
591 | 591 | args[0], args) |
|
592 | 592 | |
|
593 | 593 | def gethgcmd(): |
|
594 | 594 | return sys.argv[:1] |
|
595 | 595 | |
|
596 | 596 | def makedir(path, notindexed): |
|
597 | 597 | os.mkdir(path) |
|
598 | 598 | |
|
599 | 599 | def lookupreg(key, name=None, scope=None): |
|
600 | 600 | return None |
|
601 | 601 | |
|
602 | 602 | def hidewindow(): |
|
603 | 603 | """Hide current shell window. |
|
604 | 604 | |
|
605 | 605 | Used to hide the window opened when starting asynchronous |
|
606 | 606 | child process under Windows, unneeded on other systems. |
|
607 | 607 | """ |
|
608 | 608 | pass |
|
609 | 609 | |
|
610 | 610 | class cachestat(object): |
|
611 | 611 | def __init__(self, path): |
|
612 | 612 | self.stat = os.stat(path) |
|
613 | 613 | |
|
614 | 614 | def cacheable(self): |
|
615 | 615 | return bool(self.stat.st_ino) |
|
616 | 616 | |
|
617 | 617 | __hash__ = object.__hash__ |
|
618 | 618 | |
|
619 | 619 | def __eq__(self, other): |
|
620 | 620 | try: |
|
621 | 621 | # Only dev, ino, size, mtime and atime are likely to change. Out |
|
622 | 622 | # of these, we shouldn't compare atime but should compare the |
|
623 | 623 | # rest. However, one of the other fields changing indicates |
|
624 | 624 | # something fishy going on, so return False if anything but atime |
|
625 | 625 | # changes. |
|
626 | 626 | return (self.stat.st_mode == other.stat.st_mode and |
|
627 | 627 | self.stat.st_ino == other.stat.st_ino and |
|
628 | 628 | self.stat.st_dev == other.stat.st_dev and |
|
629 | 629 | self.stat.st_nlink == other.stat.st_nlink and |
|
630 | 630 | self.stat.st_uid == other.stat.st_uid and |
|
631 | 631 | self.stat.st_gid == other.stat.st_gid and |
|
632 | 632 | self.stat.st_size == other.stat.st_size and |
|
633 | 633 | self.stat[stat.ST_MTIME] == other.stat[stat.ST_MTIME] and |
|
634 | 634 | self.stat[stat.ST_CTIME] == other.stat[stat.ST_CTIME]) |
|
635 | 635 | except AttributeError: |
|
636 | 636 | return False |
|
637 | 637 | |
|
638 | 638 | def __ne__(self, other): |
|
639 | 639 | return not self == other |
|
640 | 640 | |
|
641 | 641 | def statislink(st): |
|
642 | 642 | '''check whether a stat result is a symlink''' |
|
643 | 643 | return st and stat.S_ISLNK(st.st_mode) |
|
644 | 644 | |
|
645 | 645 | def statisexec(st): |
|
646 | 646 | '''check whether a stat result is an executable file''' |
|
647 | 647 | return st and (st.st_mode & 0o100 != 0) |
|
648 | 648 | |
|
649 | 649 | def poll(fds): |
|
650 | 650 | """block until something happens on any file descriptor |
|
651 | 651 | |
|
652 | 652 | This is a generic helper that will check for any activity |
|
653 | 653 | (read, write. exception) and return the list of touched files. |
|
654 | 654 | |
|
655 | 655 | In unsupported cases, it will raise a NotImplementedError""" |
|
656 | 656 | try: |
|
657 | 657 | while True: |
|
658 | 658 | try: |
|
659 | 659 | res = select.select(fds, fds, fds) |
|
660 | 660 | break |
|
661 | 661 | except select.error as inst: |
|
662 | 662 | if inst.args[0] == errno.EINTR: |
|
663 | 663 | continue |
|
664 | 664 | raise |
|
665 | 665 | except ValueError: # out of range file descriptor |
|
666 | 666 | raise NotImplementedError() |
|
667 | 667 | return sorted(list(set(sum(res, [])))) |
|
668 | 668 | |
|
669 | 669 | def readpipe(pipe): |
|
670 | 670 | """Read all available data from a pipe.""" |
|
671 | 671 | # We can't fstat() a pipe because Linux will always report 0. |
|
672 | 672 | # So, we set the pipe to non-blocking mode and read everything |
|
673 | 673 | # that's available. |
|
674 | 674 | flags = fcntl.fcntl(pipe, fcntl.F_GETFL) |
|
675 | 675 | flags |= os.O_NONBLOCK |
|
676 | 676 | oldflags = fcntl.fcntl(pipe, fcntl.F_SETFL, flags) |
|
677 | 677 | |
|
678 | 678 | try: |
|
679 | 679 | chunks = [] |
|
680 | 680 | while True: |
|
681 | 681 | try: |
|
682 | 682 | s = pipe.read() |
|
683 | 683 | if not s: |
|
684 | 684 | break |
|
685 | 685 | chunks.append(s) |
|
686 | 686 | except IOError: |
|
687 | 687 | break |
|
688 | 688 | |
|
689 | 689 | return ''.join(chunks) |
|
690 | 690 | finally: |
|
691 | 691 | fcntl.fcntl(pipe, fcntl.F_SETFL, oldflags) |
|
692 | 692 | |
|
693 | 693 | def bindunixsocket(sock, path): |
|
694 | 694 | """Bind the UNIX domain socket to the specified path""" |
|
695 | 695 | # use relative path instead of full path at bind() if possible, since |
|
696 | 696 | # AF_UNIX path has very small length limit (107 chars) on common |
|
697 | 697 | # platforms (see sys/un.h) |
|
698 | 698 | dirname, basename = os.path.split(path) |
|
699 | 699 | bakwdfd = None |
|
700 | 700 | if dirname: |
|
701 | 701 | bakwdfd = os.open('.', os.O_DIRECTORY) |
|
702 | 702 | os.chdir(dirname) |
|
703 | 703 | sock.bind(basename) |
|
704 | 704 | if bakwdfd: |
|
705 | 705 | os.fchdir(bakwdfd) |
|
706 | 706 | os.close(bakwdfd) |
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