diff options
Diffstat (limited to 'websdk/mercurial/posix.py')
| -rw-r--r--[l---------] | websdk/mercurial/posix.py | 417 |
1 files changed, 416 insertions, 1 deletions
diff --git a/websdk/mercurial/posix.py b/websdk/mercurial/posix.py index 08491f6..46c3705 120000..100644 --- a/websdk/mercurial/posix.py +++ b/websdk/mercurial/posix.py @@ -1 +1,416 @@ -/usr/share/pyshared/mercurial/posix.py
\ No newline at end of file +# 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 or any later version. + +from i18n import _ +import os, sys, errno, stat, getpass, pwd, grp, tempfile, unicodedata + +posixfile = open +nulldev = '/dev/null' +normpath = os.path.normpath +samestat = os.path.samestat +oslink = os.link +unlink = os.unlink +rename = os.rename +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 nlinks(name): + '''return number of hardlinks for the given file''' + return os.lstat(name).st_nlink + +def parsepatchoutput(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 isexec(f): + """check whether a file is executable""" + return (os.lstat(f).st_mode & 0100 != 0) + +def setflags(f, l, x): + s = os.lstat(f).st_mode + if l: + if not stat.S_ISLNK(s): + # switch file to link + fp = open(f) + data = fp.read() + fp.close() + os.unlink(f) + try: + os.symlink(data, f) + except OSError: + # failed to make a link, rewrite file + fp = open(f, "w") + fp.write(data) + fp.close() + # no chmod needed at this point + return + if stat.S_ISLNK(s): + # switch link to file + data = os.readlink(f) + os.unlink(f) + fp = open(f, "w") + fp.write(data) + fp.close() + 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 copymode(src, dst, mode=None): + '''Copy the file mode from the file at path src to dst. + If src doesn't exist, we're using mode instead. If mode is None, we're + using umask.''' + try: + st_mode = os.lstat(src).st_mode & 0777 + except OSError, inst: + if inst.errno != errno.ENOENT: + raise + st_mode = mode + if st_mode is None: + st_mode = ~umask + st_mode &= 0666 + os.chmod(dst, st_mode) + +def checkexec(path): + """ + Check whether the given path is on a filesystem with UNIX-like exec flags + + Requires a directory (like /foo/.hg) + """ + + # VFAT on some Linux versions can flip mode but it doesn't persist + # a FS remount. Frequently we can detect it if files are created + # with exec bit on. + + try: + EXECFLAGS = stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH + fh, fn = tempfile.mkstemp(dir=path, prefix='hg-checkexec-') + try: + os.close(fh) + m = os.stat(fn).st_mode & 0777 + new_file_has_exec = m & EXECFLAGS + os.chmod(fn, m ^ EXECFLAGS) + exec_flags_cannot_flip = ((os.stat(fn).st_mode & 0777) == m) + finally: + os.unlink(fn) + except (IOError, OSError): + # we don't care, the user probably won't be able to commit anyway + return False + return not (new_file_has_exec or exec_flags_cannot_flip) + +def checklink(path): + """check whether the given path is on a symlink-capable filesystem""" + # mktemp is not racy because symlink creation will fail if the + # file already exists + name = tempfile.mktemp(dir=path, prefix='hg-checklink-') + try: + os.symlink(".", name) + os.unlink(name) + return True + except (OSError, AttributeError): + return False + +def checkosfilename(path): + '''Check that the base-relative path is a valid filename on this platform. + Returns None if the path is ok, or a UI string describing the problem.''' + pass # on posix platforms, every path is ok + +def setbinary(fd): + pass + +def pconvert(path): + return path + +def localpath(path): + return path + +def samefile(fpath1, fpath2): + """Returns whether path1 and path2 refer to the same file. This is only + guaranteed to work for files, not directories.""" + return os.path.samefile(fpath1, fpath2) + +def samedevice(fpath1, fpath2): + """Returns whether fpath1 and fpath2 are on the same device. This is only + guaranteed to work for files, not directories.""" + st1 = os.lstat(fpath1) + st2 = os.lstat(fpath2) + return st1.st_dev == st2.st_dev + +# os.path.normcase is a no-op, which doesn't help us on non-native filesystems +def normcase(path): + return path.lower() + +if sys.platform == 'darwin': + import fcntl # only needed on darwin, missing on jython + + def normcase(path): + try: + u = path.decode('utf-8') + except UnicodeDecodeError: + # percent-encode any characters that don't round-trip + p2 = path.decode('utf-8', 'ignore').encode('utf-8') + s = "" + pos = 0 + for c in path: + if p2[pos:pos + 1] == c: + s += c + pos += 1 + else: + s += "%%%02X" % ord(c) + u = s.decode('utf-8') + + # Decompose then lowercase (HFS+ technote specifies lower) + return unicodedata.normalize('NFD', u).lower().encode('utf-8') + + 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 == errno.ENOENT: + return path + raise + + try: + return fcntl.fcntl(fd, F_GETPATH, '\0' * 1024).rstrip('\0') + finally: + os.close(fd) +elif sys.version_info < (2, 4, 2, 'final'): + # Workaround for http://bugs.python.org/issue1213894 (os.path.realpath + # didn't resolve symlinks that were the first component of the path.) + def realpath(path): + if os.path.isabs(path): + return os.path.realpath(path) + else: + return os.path.realpath('./' + path) +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 explainexit(code): + """return a 2-tuple (desc, code) describing a subprocess status + (codes from kill are negative - not os.system/wait encoding)""" + if code >= 0: + return _("exited with status %d") % code, code + return _("killed by signal %d") % -code, -code + +def isowner(st): + """Return True if the stat object st is from the current user.""" + return st.st_uid == os.getuid() + +def findexe(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.isfile(executable) and os.access(executable, os.X_OK): + 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 setsignalhandler(): + 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 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) + +def groupmembers(name): + """Return the list of members of the group with the given + name, KeyError if the group does not exist. + """ + return list(grp.getgrnam(name).gr_mem) + +def spawndetached(args): + return os.spawnvp(os.P_NOWAIT | getattr(os, 'P_DETACH', 0), + args[0], args) + +def gethgcmd(): + return sys.argv[:1] + +def termwidth(): + try: + import termios, array, fcntl + for dev in (sys.stderr, sys.stdout, sys.stdin): + try: + try: + fd = dev.fileno() + except AttributeError: + continue + if not os.isatty(fd): + continue + arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8) + width = array.array('h', arri)[1] + if width > 0: + return width + except ValueError: + pass + except IOError, e: + if e[0] == errno.EINVAL: + pass + else: + raise + except ImportError: + pass + return 80 + +def makedir(path, notindexed): + os.mkdir(path) + +def unlinkpath(f): + """unlink and remove the directory if it is empty""" + os.unlink(f) + # try removing directories that might now be empty + try: + os.removedirs(os.path.dirname(f)) + except OSError: + pass + +def lookupreg(key, name=None, scope=None): + return None + +def hidewindow(): + """Hide current shell window. + + Used to hide the window opened when starting asynchronous + child process under Windows, unneeded on other systems. + """ + pass + +class cachestat(object): + def __init__(self, path): + self.stat = os.stat(path) + + def cacheable(self): + return bool(self.stat.st_ino) + + def __eq__(self, other): + try: + return self.stat == other.stat + except AttributeError: + return False + + def __ne__(self, other): + return not self == other + +def executablepath(): + return None # available on Windows only |