annotate mercurial/posix.py @ 9811:c92ac5a56f69

buildrpm: enable to start the script from anywhere Previously the script worked only from the hg root.
author Gilles Moris <gilles.moris@free.fr>
date Fri, 06 Nov 2009 09:35:38 +0100
parents 8b8920209317
children 750b7a4f01f6
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1 # posix.py - Posix utility function implementations for Mercurial
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2 #
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3 # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2, incorporated herein by reference.
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7
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8 from i18n import _
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9 import osutil
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10 import os, sys, errno, stat, getpass, pwd, grp, fcntl
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11
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12 posixfile = open
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13 nulldev = '/dev/null'
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14 normpath = os.path.normpath
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15 samestat = os.path.samestat
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16 rename = os.rename
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17 expandglobs = False
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18
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19 umask = os.umask(0)
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20 os.umask(umask)
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21
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22 def openhardlinks():
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23 '''return true if it is safe to hold open file handles to hardlinks'''
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24 return True
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25
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26 def rcfiles(path):
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27 rcs = [os.path.join(path, 'hgrc')]
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28 rcdir = os.path.join(path, 'hgrc.d')
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29 try:
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30 rcs.extend([os.path.join(rcdir, f)
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31 for f, kind in osutil.listdir(rcdir)
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32 if f.endswith(".rc")])
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33 except OSError:
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34 pass
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35 return rcs
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36
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37 def system_rcpath():
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38 path = []
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39 # old mod_python does not set sys.argv
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40 if len(getattr(sys, 'argv', [])) > 0:
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41 path.extend(rcfiles(os.path.dirname(sys.argv[0]) +
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42 '/../etc/mercurial'))
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43 path.extend(rcfiles('/etc/mercurial'))
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44 return path
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45
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46 def user_rcpath():
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47 return [os.path.expanduser('~/.hgrc')]
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48
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49 def parse_patch_output(output_line):
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50 """parses the output produced by patch and returns the filename"""
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51 pf = output_line[14:]
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52 if os.sys.platform == 'OpenVMS':
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53 if pf[0] == '`':
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54 pf = pf[1:-1] # Remove the quotes
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55 else:
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56 if pf.startswith("'") and pf.endswith("'") and " " in pf:
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57 pf = pf[1:-1] # Remove the quotes
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58 return pf
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59
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60 def sshargs(sshcmd, host, user, port):
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61 '''Build argument list for ssh'''
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62 args = user and ("%s@%s" % (user, host)) or host
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63 return port and ("%s -p %s" % (args, port)) or args
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64
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65 def is_exec(f):
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66 """check whether a file is executable"""
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67 return (os.lstat(f).st_mode & 0100 != 0)
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68
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69 def set_flags(f, l, x):
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70 s = os.lstat(f).st_mode
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71 if l:
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72 if not stat.S_ISLNK(s):
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73 # switch file to link
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74 data = open(f).read()
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75 os.unlink(f)
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76 try:
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77 os.symlink(data, f)
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78 except:
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79 # failed to make a link, rewrite file
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80 open(f, "w").write(data)
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81 # no chmod needed at this point
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82 return
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83 if stat.S_ISLNK(s):
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84 # switch link to file
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85 data = os.readlink(f)
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86 os.unlink(f)
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87 open(f, "w").write(data)
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88 s = 0666 & ~umask # avoid restatting for chmod
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89
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90 sx = s & 0100
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91 if x and not sx:
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92 # Turn on +x for every +r bit when making a file executable
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93 # and obey umask.
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94 os.chmod(f, s | (s & 0444) >> 2 & ~umask)
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95 elif not x and sx:
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96 # Turn off all +x bits
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97 os.chmod(f, s & 0666)
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98
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99 def set_binary(fd):
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100 pass
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101
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102 def pconvert(path):
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103 return path
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104
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105 def localpath(path):
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106 return path
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107
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108 if sys.platform == 'darwin':
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109 def realpath(path):
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110 '''
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111 Returns the true, canonical file system path equivalent to the given
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112 path.
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113
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114 Equivalent means, in this case, resulting in the same, unique
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115 file system link to the path. Every file system entry, whether a file,
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116 directory, hard link or symbolic link or special, will have a single
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117 path preferred by the system, but may allow multiple, differing path
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118 lookups to point to it.
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119
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120 Most regular UNIX file systems only allow a file system entry to be
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121 looked up by its distinct path. Obviously, this does not apply to case
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122 insensitive file systems, whether case preserving or not. The most
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123 complex issue to deal with is file systems transparently reencoding the
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124 path, such as the non-standard Unicode normalisation required for HFS+
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125 and HFSX.
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126 '''
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127 # Constants copied from /usr/include/sys/fcntl.h
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128 F_GETPATH = 50
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129 O_SYMLINK = 0x200000
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130
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131 try:
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132 fd = os.open(path, O_SYMLINK)
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133 except OSError, err:
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134 if err.errno is errno.ENOENT:
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135 return path
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
136 raise
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
137
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
138 try:
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
139 return fcntl.fcntl(fd, F_GETPATH, '\0' * 1024).rstrip('\0')
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
140 finally:
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
141 os.close(fd)
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
142 else:
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
143 # Fallback to the likely inadequate Python builtin function.
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
144 realpath = os.path.realpath
40196d036a71 util: add realpath() for getting the 'true' path.
Dan Villiom Podlaski Christiansen <danchr@gmail.com>
parents: 9031
diff changeset
145
7890
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
146 def shellquote(s):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
147 if os.sys.platform == 'OpenVMS':
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
148 return '"%s"' % s
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
149 else:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
150 return "'%s'" % s.replace("'", "'\\''")
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
151
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
152 def quotecommand(cmd):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
153 return cmd
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
154
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
155 def popen(command, mode='r'):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
156 return os.popen(command, mode)
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
157
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
158 def testpid(pid):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
159 '''return False if pid dead, True if running or not sure'''
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
160 if os.sys.platform == 'OpenVMS':
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
161 return True
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
162 try:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
163 os.kill(pid, 0)
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
164 return True
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
165 except OSError, inst:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
166 return inst.errno != errno.ESRCH
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
167
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
168 def explain_exit(code):
9517
4368f582c806 util.system: Use subprocess instead of os.system
Mads Kiilerich <mads@kiilerich.com>
parents: 9238
diff changeset
169 """return a 2-tuple (desc, code) describing a subprocess status
4368f582c806 util.system: Use subprocess instead of os.system
Mads Kiilerich <mads@kiilerich.com>
parents: 9238
diff changeset
170 (codes from kill are negative - not os.system/wait encoding)"""
4368f582c806 util.system: Use subprocess instead of os.system
Mads Kiilerich <mads@kiilerich.com>
parents: 9238
diff changeset
171 if code >= 0:
4368f582c806 util.system: Use subprocess instead of os.system
Mads Kiilerich <mads@kiilerich.com>
parents: 9238
diff changeset
172 return _("exited with status %d") % code, code
4368f582c806 util.system: Use subprocess instead of os.system
Mads Kiilerich <mads@kiilerich.com>
parents: 9238
diff changeset
173 return _("killed by signal %d") % -code, -code
7890
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
174
8657
3fa92c618624 posix: do not use fstat in isowner
Martin Geisler <mg@lazybytes.net>
parents: 8614
diff changeset
175 def isowner(st):
3fa92c618624 posix: do not use fstat in isowner
Martin Geisler <mg@lazybytes.net>
parents: 8614
diff changeset
176 """Return True if the stat object st is from the current user."""
7890
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
177 return st.st_uid == os.getuid()
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
178
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
179 def find_exe(command):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
180 '''Find executable for command searching like which does.
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
181 If command is a basename then PATH is searched for command.
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
182 PATH isn't searched if command is an absolute or relative path.
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
183 If command isn't found None is returned.'''
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
184 if sys.platform == 'OpenVMS':
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
185 return command
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
186
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
187 def findexisting(executable):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
188 'Will return executable if existing file'
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
189 if os.path.exists(executable):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
190 return executable
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
191 return None
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
192
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
193 if os.sep in command:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
194 return findexisting(command)
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
195
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
196 for path in os.environ.get('PATH', '').split(os.pathsep):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
197 executable = findexisting(os.path.join(path, command))
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
198 if executable is not None:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
199 return executable
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
200 return None
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
201
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
202 def set_signal_handler():
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
203 pass
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
204
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
205 def statfiles(files):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
206 'Stat each file in files and yield stat or None if file does not exist.'
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
207 lstat = os.lstat
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
208 for nf in files:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
209 try:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
210 st = lstat(nf)
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
211 except OSError, err:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
212 if err.errno not in (errno.ENOENT, errno.ENOTDIR):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
213 raise
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
214 st = None
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
215 yield st
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
216
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
217 def getuser():
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
218 '''return name of current user'''
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
219 return getpass.getuser()
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
220
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
221 def expand_glob(pats):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
222 '''On Windows, expand the implicit globs in a list of patterns'''
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
223 return list(pats)
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
224
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
225 def username(uid=None):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
226 """Return the name of the user with the given uid.
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
227
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
228 If uid is None, return the name of the current user."""
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
229
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
230 if uid is None:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
231 uid = os.getuid()
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
232 try:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
233 return pwd.getpwuid(uid)[0]
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
234 except KeyError:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
235 return str(uid)
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
236
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
237 def groupname(gid=None):
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
238 """Return the name of the group with the given gid.
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
239
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
240 If gid is None, return the name of the current group."""
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
241
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
242 if gid is None:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
243 gid = os.getgid()
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
244 try:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
245 return grp.getgrgid(gid)[0]
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
246 except KeyError:
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
247 return str(gid)