author | Martin Geisler <mg@aragost.com> |
Mon, 29 Nov 2010 16:17:05 +0100 | |
changeset 13143 | c2e55c21db27 |
parent 13007 | e98bf6948092 |
child 13280 | 6052bbc7aabd |
permissions | -rw-r--r-- |
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# posix.py - Posix utility function implementations for Mercurial |
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# |
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# Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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from i18n import _ |
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import osutil |
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import os, sys, errno, stat, getpass, pwd, grp |
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posixfile = open |
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nulldev = '/dev/null' |
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normpath = os.path.normpath |
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samestat = os.path.samestat |
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rename = os.rename |
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expandglobs = False |
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umask = os.umask(0) |
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os.umask(umask) |
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def openhardlinks(): |
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'''return true if it is safe to hold open file handles to hardlinks''' |
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return True |
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def rcfiles(path): |
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rcs = [os.path.join(path, 'hgrc')] |
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rcdir = os.path.join(path, 'hgrc.d') |
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try: |
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rcs.extend([os.path.join(rcdir, f) |
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for f, kind in osutil.listdir(rcdir) |
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if f.endswith(".rc")]) |
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except OSError: |
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pass |
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return rcs |
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def system_rcpath(): |
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path = [] |
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# old mod_python does not set sys.argv |
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if len(getattr(sys, 'argv', [])) > 0: |
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path.extend(rcfiles(os.path.dirname(sys.argv[0]) + |
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'/../etc/mercurial')) |
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path.extend(rcfiles('/etc/mercurial')) |
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return path |
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def user_rcpath(): |
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return [os.path.expanduser('~/.hgrc')] |
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def parse_patch_output(output_line): |
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"""parses the output produced by patch and returns the filename""" |
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pf = output_line[14:] |
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if os.sys.platform == 'OpenVMS': |
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if pf[0] == '`': |
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pf = pf[1:-1] # Remove the quotes |
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else: |
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whitespace cleanup
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if pf.startswith("'") and pf.endswith("'") and " " in pf: |
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pf = pf[1:-1] # Remove the quotes |
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return pf |
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def sshargs(sshcmd, host, user, port): |
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'''Build argument list for ssh''' |
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args = user and ("%s@%s" % (user, host)) or host |
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return port and ("%s -p %s" % (args, port)) or args |
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def is_exec(f): |
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"""check whether a file is executable""" |
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return (os.lstat(f).st_mode & 0100 != 0) |
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def set_flags(f, l, x): |
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s = os.lstat(f).st_mode |
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if l: |
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if not stat.S_ISLNK(s): |
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# switch file to link |
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data = open(f).read() |
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os.unlink(f) |
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try: |
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os.symlink(data, f) |
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except: |
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# failed to make a link, rewrite file |
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open(f, "w").write(data) |
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# no chmod needed at this point |
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return |
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if stat.S_ISLNK(s): |
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# switch link to file |
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data = os.readlink(f) |
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os.unlink(f) |
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open(f, "w").write(data) |
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s = 0666 & ~umask # avoid restatting for chmod |
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sx = s & 0100 |
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if x and not sx: |
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# Turn on +x for every +r bit when making a file executable |
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# and obey umask. |
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os.chmod(f, s | (s & 0444) >> 2 & ~umask) |
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elif not x and sx: |
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# Turn off all +x bits |
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os.chmod(f, s & 0666) |
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def set_binary(fd): |
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pass |
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def pconvert(path): |
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return path |
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def localpath(path): |
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return path |
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def samefile(fpath1, fpath2): |
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"""Returns whether path1 and path2 refer to the same file. This is only |
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guaranteed to work for files, not directories.""" |
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return os.path.samefile(fpath1, fpath2) |
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def samedevice(fpath1, fpath2): |
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"""Returns whether fpath1 and fpath2 are on the same device. This is only |
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guaranteed to work for files, not directories.""" |
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st1 = os.lstat(fpath1) |
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st2 = os.lstat(fpath2) |
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return st1.st_dev == st2.st_dev |
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119 |
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120 |
if sys.platform == 'darwin': |
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import fcntl # only needed on darwin, missing on jython |
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122 |
def realpath(path): |
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123 |
''' |
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124 |
Returns the true, canonical file system path equivalent to the given |
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125 |
path. |
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126 |
|
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127 |
Equivalent means, in this case, resulting in the same, unique |
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128 |
file system link to the path. Every file system entry, whether a file, |
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129 |
directory, hard link or symbolic link or special, will have a single |
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130 |
path preferred by the system, but may allow multiple, differing path |
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131 |
lookups to point to it. |
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132 |
|
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133 |
Most regular UNIX file systems only allow a file system entry to be |
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134 |
looked up by its distinct path. Obviously, this does not apply to case |
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135 |
insensitive file systems, whether case preserving or not. The most |
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136 |
complex issue to deal with is file systems transparently reencoding the |
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137 |
path, such as the non-standard Unicode normalisation required for HFS+ |
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138 |
and HFSX. |
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139 |
''' |
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140 |
# Constants copied from /usr/include/sys/fcntl.h |
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141 |
F_GETPATH = 50 |
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142 |
O_SYMLINK = 0x200000 |
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143 |
|
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144 |
try: |
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145 |
fd = os.open(path, O_SYMLINK) |
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146 |
except OSError, err: |
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147 |
if err.errno == errno.ENOENT: |
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148 |
return path |
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149 |
raise |
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150 |
|
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151 |
try: |
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152 |
return fcntl.fcntl(fd, F_GETPATH, '\0' * 1024).rstrip('\0') |
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153 |
finally: |
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154 |
os.close(fd) |
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155 |
else: |
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156 |
# Fallback to the likely inadequate Python builtin function. |
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157 |
realpath = os.path.realpath |
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158 |
|
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159 |
def shellquote(s): |
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160 |
if os.sys.platform == 'OpenVMS': |
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161 |
return '"%s"' % s |
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162 |
else: |
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163 |
return "'%s'" % s.replace("'", "'\\''") |
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164 |
|
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165 |
def quotecommand(cmd): |
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166 |
return cmd |
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167 |
|
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168 |
def popen(command, mode='r'): |
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169 |
return os.popen(command, mode) |
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170 |
|
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171 |
def testpid(pid): |
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172 |
'''return False if pid dead, True if running or not sure''' |
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173 |
if os.sys.platform == 'OpenVMS': |
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174 |
return True |
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175 |
try: |
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176 |
os.kill(pid, 0) |
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177 |
return True |
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178 |
except OSError, inst: |
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179 |
return inst.errno != errno.ESRCH |
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180 |
|
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181 |
def explain_exit(code): |
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182 |
"""return a 2-tuple (desc, code) describing a subprocess status |
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183 |
(codes from kill are negative - not os.system/wait encoding)""" |
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184 |
if code >= 0: |
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return _("exited with status %d") % code, code |
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186 |
return _("killed by signal %d") % -code, -code |
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187 |
|
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188 |
def isowner(st): |
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189 |
"""Return True if the stat object st is from the current user.""" |
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190 |
return st.st_uid == os.getuid() |
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191 |
|
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192 |
def find_exe(command): |
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193 |
'''Find executable for command searching like which does. |
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194 |
If command is a basename then PATH is searched for command. |
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195 |
PATH isn't searched if command is an absolute or relative path. |
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196 |
If command isn't found None is returned.''' |
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197 |
if sys.platform == 'OpenVMS': |
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198 |
return command |
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199 |
|
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200 |
def findexisting(executable): |
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201 |
'Will return executable if existing file' |
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202 |
if os.path.exists(executable): |
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203 |
return executable |
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204 |
return None |
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205 |
|
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206 |
if os.sep in command: |
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207 |
return findexisting(command) |
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208 |
|
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209 |
for path in os.environ.get('PATH', '').split(os.pathsep): |
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210 |
executable = findexisting(os.path.join(path, command)) |
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211 |
if executable is not None: |
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212 |
return executable |
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213 |
return None |
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214 |
|
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215 |
def set_signal_handler(): |
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216 |
pass |
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217 |
|
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218 |
def statfiles(files): |
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219 |
'Stat each file in files and yield stat or None if file does not exist.' |
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220 |
lstat = os.lstat |
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221 |
for nf in files: |
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222 |
try: |
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223 |
st = lstat(nf) |
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224 |
except OSError, err: |
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225 |
if err.errno not in (errno.ENOENT, errno.ENOTDIR): |
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226 |
raise |
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227 |
st = None |
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228 |
yield st |
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229 |
|
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230 |
def getuser(): |
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231 |
'''return name of current user''' |
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return getpass.getuser() |
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233 |
|
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def expand_glob(pats): |
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'''On Windows, expand the implicit globs in a list of patterns''' |
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return list(pats) |
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237 |
|
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def username(uid=None): |
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"""Return the name of the user with the given uid. |
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240 |
|
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If uid is None, return the name of the current user.""" |
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242 |
|
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if uid is None: |
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uid = os.getuid() |
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245 |
try: |
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return pwd.getpwuid(uid)[0] |
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247 |
except KeyError: |
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return str(uid) |
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249 |
|
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250 |
def groupname(gid=None): |
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251 |
"""Return the name of the group with the given gid. |
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252 |
|
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253 |
If gid is None, return the name of the current group.""" |
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254 |
|
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255 |
if gid is None: |
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gid = os.getgid() |
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257 |
try: |
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return grp.getgrgid(gid)[0] |
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259 |
except KeyError: |
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return str(gid) |
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261 |
|
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262 |
def groupmembers(name): |
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263 |
"""Return the list of members of the group with the given |
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264 |
name, KeyError if the group does not exist. |
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265 |
""" |
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266 |
return list(grp.getgrnam(name).gr_mem) |
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267 |
|
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268 |
def spawndetached(args): |
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|
269 |
return os.spawnvp(os.P_NOWAIT | getattr(os, 'P_DETACH', 0), |
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270 |
args[0], args) |
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271 |
|
10239
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Find right hg command for detached process
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272 |
def gethgcmd(): |
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273 |
return sys.argv[:1] |
11010
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util: fix default termwidth() under Windows
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274 |
|
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termwidth: move to ui.ui from util
Augie Fackler <durin42@gmail.com>
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275 |
def termwidth(): |
11010
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276 |
try: |
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277 |
import termios, array, fcntl |
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|
278 |
for dev in (sys.stderr, sys.stdout, sys.stdin): |
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|
279 |
try: |
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|
280 |
try: |
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|
281 |
fd = dev.fileno() |
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diff
changeset
|
282 |
except AttributeError: |
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diff
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|
283 |
continue |
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|
284 |
if not os.isatty(fd): |
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|
285 |
continue |
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|
286 |
arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8) |
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|
287 |
return array.array('h', arri)[1] |
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|
288 |
except ValueError: |
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|
289 |
pass |
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|
290 |
except IOError, e: |
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|
291 |
if e[0] == errno.EINVAL: |
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|
292 |
pass |
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|
293 |
else: |
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|
294 |
raise |
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|
295 |
except ImportError: |
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|
296 |
pass |
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|
297 |
return 80 |