mercurial/posix.py
author Rocco Rutte <pdmef@gmx.net>
Fri, 27 Mar 2009 17:56:18 +0100
changeset 7906 c0dc1f15b30d
parent 7890 e710f0f592b2
child 7943 c289c3fc5985
permissions -rw-r--r--
Add missing imports for posix.py for OS X These don't seem to do harm on Linux.
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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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   135
    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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   138
    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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   142
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   143
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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   145
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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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   148
    if st is None:
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        st = fstat(fp)
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   150
    return st.st_uid == os.getuid()
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   151
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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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   157
    if sys.platform == 'OpenVMS':
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   158
        return command
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   159
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   160
    def findexisting(executable):
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   161
        'Will return executable if existing file'
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   162
        if os.path.exists(executable):
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   163
            return executable
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   164
        return None
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   165
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   166
    if os.sep in command:
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   167
        return findexisting(command)
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Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   168
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   169
    for path in os.environ.get('PATH', '').split(os.pathsep):
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   170
        executable = findexisting(os.path.join(path, command))
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   171
        if executable is not None:
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   172
            return executable
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   173
    return None
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Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   174
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parents:
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   175
def set_signal_handler():
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   176
    pass
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parents:
diff changeset
   177
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   178
def statfiles(files):
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   179
    'Stat each file in files and yield stat or None if file does not exist.'
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parents:
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   180
    lstat = os.lstat
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   181
    for nf in files:
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   182
        try:
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   183
            st = lstat(nf)
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   184
        except OSError, err:
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parents:
diff changeset
   185
            if err.errno not in (errno.ENOENT, errno.ENOTDIR):
e710f0f592b2 util: split out posix, windows, and win32 modules
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parents:
diff changeset
   186
                raise
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parents:
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   187
            st = None
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   188
        yield st
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Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   189
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   190
def getuser():
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   191
    '''return name of current user'''
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   192
    return getpass.getuser()
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Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   193
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   194
def expand_glob(pats):
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   195
    '''On Windows, expand the implicit globs in a list of patterns'''
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   196
    return list(pats)
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parents:
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   197
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   198
def username(uid=None):
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   199
    """Return the name of the user with the given uid.
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parents:
diff changeset
   200
e710f0f592b2 util: split out posix, windows, and win32 modules
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   201
    If uid is None, return the name of the current user."""
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parents:
diff changeset
   202
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   203
    if uid is None:
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diff changeset
   204
        uid = os.getuid()
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parents:
diff changeset
   205
    try:
e710f0f592b2 util: split out posix, windows, and win32 modules
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parents:
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   206
        return pwd.getpwuid(uid)[0]
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parents:
diff changeset
   207
    except KeyError:
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   208
        return str(uid)
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Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   209
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   210
def groupname(gid=None):
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parents:
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   211
    """Return the name of the group with the given gid.
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parents:
diff changeset
   212
e710f0f592b2 util: split out posix, windows, and win32 modules
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parents:
diff changeset
   213
    If gid is None, return the name of the current group."""
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Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   214
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   215
    if gid is None:
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parents:
diff changeset
   216
        gid = os.getgid()
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   217
    try:
e710f0f592b2 util: split out posix, windows, and win32 modules
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parents:
diff changeset
   218
        return grp.getgrgid(gid)[0]
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parents:
diff changeset
   219
    except KeyError:
e710f0f592b2 util: split out posix, windows, and win32 modules
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parents:
diff changeset
   220
        return str(gid)
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   221
e710f0f592b2 util: split out posix, windows, and win32 modules
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   222