252 lines
7.2 KiB
Python
252 lines
7.2 KiB
Python
# 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 osutil
|
|
import os, sys, errno, stat, getpass, pwd, grp, fcntl
|
|
|
|
posixfile = open
|
|
nulldev = '/dev/null'
|
|
normpath = os.path.normpath
|
|
samestat = os.path.samestat
|
|
expandglobs = False
|
|
|
|
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 filename"""
|
|
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 = open(f).read()
|
|
os.unlink(f)
|
|
try:
|
|
os.symlink(data, f)
|
|
except:
|
|
# failed to make a link, rewrite file
|
|
open(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)
|
|
open(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
|
|
|
|
if sys.platform == 'darwin':
|
|
def realpath(path):
|
|
'''
|
|
Returns the true, canonical file system path equivalent to the given
|
|
path.
|
|
|
|
Equivalent means, in this case, resulting in the same, unique
|
|
file system link to the path. Every file system entry, whether a file,
|
|
directory, hard link or symbolic link or special, will have a single
|
|
path preferred by the system, but may allow multiple, differing path
|
|
lookups to point to it.
|
|
|
|
Most regular UNIX file systems only allow a file system entry to be
|
|
looked up by its distinct path. Obviously, this does not apply to case
|
|
insensitive file systems, whether case preserving or not. The most
|
|
complex issue to deal with is file systems transparently reencoding the
|
|
path, such as the non-standard Unicode normalisation required for HFS+
|
|
and HFSX.
|
|
'''
|
|
# Constants copied from /usr/include/sys/fcntl.h
|
|
F_GETPATH = 50
|
|
O_SYMLINK = 0x200000
|
|
|
|
try:
|
|
fd = os.open(path, O_SYMLINK)
|
|
except OSError, err:
|
|
if err.errno is errno.ENOENT:
|
|
return path
|
|
raise
|
|
|
|
try:
|
|
return fcntl.fcntl(fd, F_GETPATH, '\0' * 1024).rstrip('\0')
|
|
finally:
|
|
os.close(fd)
|
|
else:
|
|
# Fallback to the likely inadequate Python builtin function.
|
|
realpath = os.path.realpath
|
|
|
|
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(st):
|
|
"""Return True if the stat object st is from the current user."""
|
|
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)
|