"""
posix.py - Posix utility function implementations for Mercurial
Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
This software may be used and distributed according to the terms of
the GNU General Public License version 2, incorporated herein by
reference.
"""
from i18n import _
import os, sys, osutil, errno, stat, getpass, pwd, grp
posixfile = file
nulldev = '/dev/null'
normpath = os.path.normpath
samestat = os.path.samestat
umask = os.umask(0)
os.umask(umask)
def openhardlinks():
'''return true if it is safe to hold open file handles to hardlinks'''
return True
def rcfiles(path):
rcs = [os.path.join(path, 'hgrc')]
rcdir = os.path.join(path, 'hgrc.d')
try:
rcs.extend([os.path.join(rcdir, f)
for f, kind in osutil.listdir(rcdir)
if f.endswith(".rc")])
except OSError:
pass
return rcs
def system_rcpath():
path = []
# old mod_python does not set sys.argv
if len(getattr(sys, 'argv', [])) > 0:
path.extend(rcfiles(os.path.dirname(sys.argv[0]) +
'/../etc/mercurial'))
path.extend(rcfiles('/etc/mercurial'))
return path
def user_rcpath():
return [os.path.expanduser('~/.hgrc')]
def parse_patch_output(output_line):
"""parses the output produced by patch and returns the file name"""
pf = output_line[14:]
if os.sys.platform == 'OpenVMS':
if pf[0] == '`':
pf = pf[1:-1] # Remove the quotes
else:
if pf.startswith("'") and pf.endswith("'") and " " in pf:
pf = pf[1:-1] # Remove the quotes
return pf
def sshargs(sshcmd, host, user, port):
'''Build argument list for ssh'''
args = user and ("%s@%s" % (user, host)) or host
return port and ("%s -p %s" % (args, port)) or args
def is_exec(f):
"""check whether a file is executable"""
return (os.lstat(f).st_mode & 0100 != 0)
def set_flags(f, l, x):
s = os.lstat(f).st_mode
if l:
if not stat.S_ISLNK(s):
# switch file to link
data = file(f).read()
os.unlink(f)
try:
os.symlink(data, f)
except:
# failed to make a link, rewrite file
file(f, "w").write(data)
# no chmod needed at this point
return
if stat.S_ISLNK(s):
# switch link to file
data = os.readlink(f)
os.unlink(f)
file(f, "w").write(data)
s = 0666 & ~umask # avoid restatting for chmod
sx = s & 0100
if x and not sx:
# Turn on +x for every +r bit when making a file executable
# and obey umask.
os.chmod(f, s | (s & 0444) >> 2 & ~umask)
elif not x and sx:
# Turn off all +x bits
os.chmod(f, s & 0666)
def set_binary(fd):
pass
def pconvert(path):
return path
def localpath(path):
return path
def shellquote(s):
if os.sys.platform == 'OpenVMS':
return '"%s"' % s
else:
return "'%s'" % s.replace("'", "'\\''")
def quotecommand(cmd):
return cmd
def popen(command, mode='r'):
return os.popen(command, mode)
def testpid(pid):
'''return False if pid dead, True if running or not sure'''
if os.sys.platform == 'OpenVMS':
return True
try:
os.kill(pid, 0)
return True
except OSError, inst:
return inst.errno != errno.ESRCH
def explain_exit(code):
"""return a 2-tuple (desc, code) describing a process's status"""
if os.WIFEXITED(code):
val = os.WEXITSTATUS(code)
return _("exited with status %d") % val, val
elif os.WIFSIGNALED(code):
val = os.WTERMSIG(code)
return _("killed by signal %d") % val, val
elif os.WIFSTOPPED(code):
val = os.WSTOPSIG(code)
return _("stopped by signal %d") % val, val
raise ValueError(_("invalid exit code"))
def isowner(fp, st=None):
"""Return True if the file object f belongs to the current user.
The return value of a util.fstat(f) may be passed as the st argument.
"""
if st is None:
st = fstat(fp)
return st.st_uid == os.getuid()
def find_exe(command):
'''Find executable for command searching like which does.
If command is a basename then PATH is searched for command.
PATH isn't searched if command is an absolute or relative path.
If command isn't found None is returned.'''
if sys.platform == 'OpenVMS':
return command
def findexisting(executable):
'Will return executable if existing file'
if os.path.exists(executable):
return executable
return None
if os.sep in command:
return findexisting(command)
for path in os.environ.get('PATH', '').split(os.pathsep):
executable = findexisting(os.path.join(path, command))
if executable is not None:
return executable
return None
def set_signal_handler():
pass
def statfiles(files):
'Stat each file in files and yield stat or None if file does not exist.'
lstat = os.lstat
for nf in files:
try:
st = lstat(nf)
except OSError, err:
if err.errno not in (errno.ENOENT, errno.ENOTDIR):
raise
st = None
yield st
def getuser():
'''return name of current user'''
return getpass.getuser()
def expand_glob(pats):
'''On Windows, expand the implicit globs in a list of patterns'''
return list(pats)
def username(uid=None):
"""Return the name of the user with the given uid.
If uid is None, return the name of the current user."""
if uid is None:
uid = os.getuid()
try:
return pwd.getpwuid(uid)[0]
except KeyError:
return str(uid)
def groupname(gid=None):
"""Return the name of the group with the given gid.
If gid is None, return the name of the current group."""
if gid is None:
gid = os.getgid()
try:
return grp.getgrgid(gid)[0]
except KeyError:
return str(gid)