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"""
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posix.py - Posix utility function implementations for Mercurial
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Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
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This software may be used and distributed according to the terms of
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the GNU General Public License version 2, incorporated herein by
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reference.
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"""
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from i18n import _
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import os, sys, osutil, errno, stat, getpass, pwd, grp
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posixfile = file
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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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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 file name"""
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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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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 = file(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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file(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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file(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 shellquote(s):
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if os.sys.platform == 'OpenVMS':
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return '"%s"' % s
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else:
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return "'%s'" % s.replace("'", "'\\''")
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def quotecommand(cmd):
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return cmd
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def popen(command, mode='r'):
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return os.popen(command, mode)
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def testpid(pid):
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'''return False if pid dead, True if running or not sure'''
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if os.sys.platform == 'OpenVMS':
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return True
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try:
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os.kill(pid, 0)
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return True
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except OSError, inst:
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return inst.errno != errno.ESRCH
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def explain_exit(code):
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"""return a 2-tuple (desc, code) describing a process's status"""
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if os.WIFEXITED(code):
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val = os.WEXITSTATUS(code)
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return _("exited with status %d") % val, val
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elif os.WIFSIGNALED(code):
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val = os.WTERMSIG(code)
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return _("killed by signal %d") % val, val
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elif os.WIFSTOPPED(code):
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val = os.WSTOPSIG(code)
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return _("stopped by signal %d") % val, val
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raise ValueError(_("invalid exit code"))
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def isowner(fp, st=None):
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"""Return True if the file object f belongs to the current user.
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The return value of a util.fstat(f) may be passed as the st argument.
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"""
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if st is None:
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st = fstat(fp)
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return st.st_uid == os.getuid()
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def find_exe(command):
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'''Find executable for command searching like which does.
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If command is a basename then PATH is searched for command.
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PATH isn't searched if command is an absolute or relative path.
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If command isn't found None is returned.'''
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if sys.platform == 'OpenVMS':
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return command
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def findexisting(executable):
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'Will return executable if existing file'
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if os.path.exists(executable):
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return executable
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return None
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if os.sep in command:
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return findexisting(command)
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for path in os.environ.get('PATH', '').split(os.pathsep):
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executable = findexisting(os.path.join(path, command))
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if executable is not None:
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return executable
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return None
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def set_signal_handler():
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pass
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def statfiles(files):
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'Stat each file in files and yield stat or None if file does not exist.'
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lstat = os.lstat
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for nf in files:
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try:
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st = lstat(nf)
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except OSError, err:
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if err.errno not in (errno.ENOENT, errno.ENOTDIR):
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raise
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st = None
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yield st
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def getuser():
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'''return name of current user'''
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return getpass.getuser()
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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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def username(uid=None):
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"""Return the name of the user with the given uid.
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If uid is None, return the name of the current user."""
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if uid is None:
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uid = os.getuid()
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try:
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return pwd.getpwuid(uid)[0]
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except KeyError:
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return str(uid)
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def groupname(gid=None):
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"""Return the name of the group with the given gid.
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If gid is None, return the name of the current group."""
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if gid is None:
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gid = os.getgid()
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try:
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return grp.getgrgid(gid)[0]
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except KeyError:
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return str(gid)
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