This file is indexed.

/usr/lib/python2.7/dist-packages/mercurial/posix.py is in mercurial-common 4.5.3-1ubuntu2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
# 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 __future__ import absolute_import

import errno
import fcntl
import getpass
import grp
import os
import pwd
import re
import select
import stat
import sys
import tempfile
import unicodedata

from .i18n import _
from . import (
    encoding,
    error,
    policy,
    pycompat,
)

osutil = policy.importmod(r'osutil')

posixfile = open
normpath = os.path.normpath
samestat = os.path.samestat
try:
    oslink = os.link
except AttributeError:
    # Some platforms build Python without os.link on systems that are
    # vaguely unix-like but don't have hardlink support. For those
    # poor souls, just say we tried and that it failed so we fall back
    # to copies.
    def oslink(src, dst):
        raise OSError(errno.EINVAL,
                      'hardlinks not supported: %s to %s' % (src, dst))
unlink = os.unlink
rename = os.rename
removedirs = os.removedirs
expandglobs = False

umask = os.umask(0)
os.umask(umask)

def split(p):
    '''Same as posixpath.split, but faster

    >>> import posixpath
    >>> for f in [b'/absolute/path/to/file',
    ...           b'relative/path/to/file',
    ...           b'file_alone',
    ...           b'path/to/directory/',
    ...           b'/multiple/path//separators',
    ...           b'/file_at_root',
    ...           b'///multiple_leading_separators_at_root',
    ...           b'']:
    ...     assert split(f) == posixpath.split(f), f
    '''
    ht = p.rsplit('/', 1)
    if len(ht) == 1:
        return '', p
    nh = ht[0].rstrip('/')
    if nh:
        return nh, ht[1]
    return ht[0] + '/', ht[1]

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 pycompat.sysplatform == '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
    if '-' in args[:1]:
        raise error.Abort(
            _('illegal ssh hostname or username starting with -: %s') % args)
    args = shellquote(args)
    if port:
        args = '-p %s %s' % (shellquote(port), args)
    return args

def isexec(f):
    """check whether a file is executable"""
    return (os.lstat(f).st_mode & 0o100 != 0)

def setflags(f, l, x):
    st = os.lstat(f)
    s = st.st_mode
    if l:
        if not stat.S_ISLNK(s):
            # switch file to link
            fp = open(f)
            data = fp.read()
            fp.close()
            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)
        unlink(f)
        fp = open(f, "w")
        fp.write(data)
        fp.close()
        s = 0o666 & ~umask # avoid restatting for chmod

    sx = s & 0o100
    if st.st_nlink > 1 and bool(x) != bool(sx):
        # the file is a hardlink, break it
        with open(f, "rb") as fp:
            data = fp.read()
        unlink(f)
        with open(f, "wb") as fp:
            fp.write(data)

    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 & 0o444) >> 2 & ~umask)
    elif not x and sx:
        # Turn off all +x bits
        os.chmod(f, s & 0o666)

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 & 0o777
    except OSError as inst:
        if inst.errno != errno.ENOENT:
            raise
        st_mode = mode
        if st_mode is None:
            st_mode = ~umask
        st_mode &= 0o666
    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
        cachedir = os.path.join(path, '.hg', 'cache')
        if os.path.isdir(cachedir):
            checkisexec = os.path.join(cachedir, 'checkisexec')
            checknoexec = os.path.join(cachedir, 'checknoexec')

            try:
                m = os.stat(checkisexec).st_mode
            except OSError as e:
                if e.errno != errno.ENOENT:
                    raise
                # checkisexec does not exist - fall through ...
            else:
                # checkisexec exists, check if it actually is exec
                if m & EXECFLAGS != 0:
                    # ensure checkisexec exists, check it isn't exec
                    try:
                        m = os.stat(checknoexec).st_mode
                    except OSError as e:
                        if e.errno != errno.ENOENT:
                            raise
                        open(checknoexec, 'w').close() # might fail
                        m = os.stat(checknoexec).st_mode
                    if m & EXECFLAGS == 0:
                        # check-exec is exec and check-no-exec is not exec
                        return True
                    # checknoexec exists but is exec - delete it
                    unlink(checknoexec)
                # checkisexec exists but is not exec - delete it
                unlink(checkisexec)

            # check using one file, leave it as checkisexec
            checkdir = cachedir
        else:
            # check directly in path and don't leave checkisexec behind
            checkdir = path
            checkisexec = None
        fh, fn = tempfile.mkstemp(dir=checkdir, prefix='hg-checkexec-')
        try:
            os.close(fh)
            m = os.stat(fn).st_mode
            if m & EXECFLAGS == 0:
                os.chmod(fn, m & 0o777 | EXECFLAGS)
                if os.stat(fn).st_mode & EXECFLAGS != 0:
                    if checkisexec is not None:
                        os.rename(fn, checkisexec)
                        fn = None
                    return True
        finally:
            if fn is not None:
                unlink(fn)
    except (IOError, OSError):
        # we don't care, the user probably won't be able to commit anyway
        return False

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
    while True:
        cachedir = os.path.join(path, '.hg', 'cache')
        checklink = os.path.join(cachedir, 'checklink')
        # try fast path, read only
        if os.path.islink(checklink):
            return True
        if os.path.isdir(cachedir):
            checkdir = cachedir
        else:
            checkdir = path
            cachedir = None
        fscheckdir = pycompat.fsdecode(checkdir)
        name = tempfile.mktemp(dir=fscheckdir,
                               prefix=r'checklink-')
        name = pycompat.fsencode(name)
        try:
            fd = None
            if cachedir is None:
                fd = tempfile.NamedTemporaryFile(dir=fscheckdir,
                                                 prefix=r'hg-checklink-')
                target = pycompat.fsencode(os.path.basename(fd.name))
            else:
                # create a fixed file to link to; doesn't matter if it
                # already exists.
                target = 'checklink-target'
                try:
                    open(os.path.join(cachedir, target), 'w').close()
                except IOError as inst:
                    if inst[0] == errno.EACCES:
                        # If we can't write to cachedir, just pretend
                        # that the fs is readonly and by association
                        # that the fs won't support symlinks. This
                        # seems like the least dangerous way to avoid
                        # data loss.
                        return False
                    raise
            try:
                os.symlink(target, name)
                if cachedir is None:
                    unlink(name)
                else:
                    try:
                        os.rename(name, checklink)
                    except OSError:
                        unlink(name)
                return True
            except OSError as inst:
                # link creation might race, try again
                if inst[0] == errno.EEXIST:
                    continue
                raise
            finally:
                if fd is not None:
                    fd.close()
        except AttributeError:
            return False
        except OSError as inst:
            # sshfs might report failure while successfully creating the link
            if inst[0] == errno.EIO and os.path.exists(name):
                unlink(name)
            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.'''
    return None # on posix platforms, every path is ok

def getfsmountpoint(dirpath):
    '''Get the filesystem mount point from a directory (best-effort)

    Returns None if we are unsure. Raises OSError on ENOENT, EPERM, etc.
    '''
    return getattr(osutil, 'getfsmountpoint', lambda x: None)(dirpath)

def getfstype(dirpath):
    '''Get the filesystem type name from a directory (best-effort)

    Returns None if we are unsure. Raises OSError on ENOENT, EPERM, etc.
    '''
    return getattr(osutil, 'getfstype', lambda x: None)(dirpath)

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()

# what normcase does to ASCII strings
normcasespec = encoding.normcasespecs.lower
# fallback normcase function for non-ASCII strings
normcasefallback = normcase

if pycompat.isdarwin:

    def normcase(path):
        '''
        Normalize a filename for OS X-compatible comparison:
        - escape-encode invalid characters
        - decompose to NFD
        - lowercase
        - omit ignored characters [200c-200f, 202a-202e, 206a-206f,feff]

        >>> normcase(b'UPPER')
        'upper'
        >>> normcase(b'Caf\\xc3\\xa9')
        'cafe\\xcc\\x81'
        >>> normcase(b'\\xc3\\x89')
        'e\\xcc\\x81'
        >>> normcase(b'\\xb8\\xca\\xc3\\xca\\xbe\\xc8.JPG') # issue3918
        '%b8%ca%c3\\xca\\xbe%c8.jpg'
        '''

        try:
            return encoding.asciilower(path)  # exception for non-ASCII
        except UnicodeDecodeError:
            return normcasefallback(path)

    normcasespec = encoding.normcasespecs.lower

    def normcasefallback(path):
        try:
            u = path.decode('utf-8')
        except UnicodeDecodeError:
            # OS X percent-encodes any bytes that aren't valid utf-8
            s = ''
            pos = 0
            l = len(path)
            while pos < l:
                try:
                    c = encoding.getutf8char(path, pos)
                    pos += len(c)
                except ValueError:
                    c = '%%%02X' % ord(path[pos:pos + 1])
                    pos += 1
                s += c

            u = s.decode('utf-8')

        # Decompose then lowercase (HFS+ technote specifies lower)
        enc = unicodedata.normalize(r'NFD', u).lower().encode('utf-8')
        # drop HFS+ ignored characters
        return encoding.hfsignoreclean(enc)

if pycompat.sysplatform == 'cygwin':
    # workaround for cygwin, in which mount point part of path is
    # treated as case sensitive, even though underlying NTFS is case
    # insensitive.

    # default mount points
    cygwinmountpoints = sorted([
            "/usr/bin",
            "/usr/lib",
            "/cygdrive",
            ], reverse=True)

    # use upper-ing as normcase as same as NTFS workaround
    def normcase(path):
        pathlen = len(path)
        if (pathlen == 0) or (path[0] != pycompat.ossep):
            # treat as relative
            return encoding.upper(path)

        # to preserve case of mountpoint part
        for mp in cygwinmountpoints:
            if not path.startswith(mp):
                continue

            mplen = len(mp)
            if mplen == pathlen: # mount point itself
                return mp
            if path[mplen] == pycompat.ossep:
                return mp + encoding.upper(path[mplen:])

        return encoding.upper(path)

    normcasespec = encoding.normcasespecs.other
    normcasefallback = normcase

    # Cygwin translates native ACLs to POSIX permissions,
    # but these translations are not supported by native
    # tools, so the exec bit tends to be set erroneously.
    # Therefore, disable executable bit access on Cygwin.
    def checkexec(path):
        return False

    # Similarly, Cygwin's symlink emulation is likely to create
    # problems when Mercurial is used from both Cygwin and native
    # Windows, with other native tools, or on shared volumes
    def checklink(path):
        return False

_needsshellquote = None
def shellquote(s):
    if pycompat.sysplatform == 'OpenVMS':
        return '"%s"' % s
    global _needsshellquote
    if _needsshellquote is None:
        _needsshellquote = re.compile(br'[^a-zA-Z0-9._/+-]').search
    if s and not _needsshellquote(s):
        # "s" shouldn't have to be quoted
        return 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 pycompat.sysplatform == 'OpenVMS':
        return True
    try:
        os.kill(pid, 0)
        return True
    except OSError as 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 pycompat.sysplatform == '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 pycompat.ossep in command:
        return findexisting(command)

    if pycompat.sysplatform == 'plan9':
        return findexisting(os.path.join('/bin', command))

    for path in encoding.environ.get('PATH', '').split(pycompat.ospathsep):
        executable = findexisting(os.path.join(path, command))
        if executable is not None:
            return executable
    return None

def setsignalhandler():
    pass

_wantedkinds = {stat.S_IFREG, stat.S_IFLNK}

def statfiles(files):
    '''Stat each file in files. Yield each stat, or None if a file does not
    exist or has a type we don't care about.'''
    lstat = os.lstat
    getkind = stat.S_IFMT
    for nf in files:
        try:
            st = lstat(nf)
            if getkind(st.st_mode) not in _wantedkinds:
                st = None
        except OSError as err:
            if err.errno not in (errno.ENOENT, errno.ENOTDIR):
                raise
            st = None
        yield st

def getuser():
    '''return name of current user'''
    return pycompat.fsencode(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 makedir(path, notindexed):
    os.mkdir(path)

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)

    __hash__ = object.__hash__

    def __eq__(self, other):
        try:
            # Only dev, ino, size, mtime and atime are likely to change. Out
            # of these, we shouldn't compare atime but should compare the
            # rest. However, one of the other fields changing indicates
            # something fishy going on, so return False if anything but atime
            # changes.
            return (self.stat.st_mode == other.stat.st_mode and
                    self.stat.st_ino == other.stat.st_ino and
                    self.stat.st_dev == other.stat.st_dev and
                    self.stat.st_nlink == other.stat.st_nlink and
                    self.stat.st_uid == other.stat.st_uid and
                    self.stat.st_gid == other.stat.st_gid and
                    self.stat.st_size == other.stat.st_size and
                    self.stat.st_mtime == other.stat.st_mtime and
                    self.stat.st_ctime == other.stat.st_ctime)
        except AttributeError:
            return False

    def __ne__(self, other):
        return not self == other

def executablepath():
    return None # available on Windows only

def statislink(st):
    '''check whether a stat result is a symlink'''
    return st and stat.S_ISLNK(st.st_mode)

def statisexec(st):
    '''check whether a stat result is an executable file'''
    return st and (st.st_mode & 0o100 != 0)

def poll(fds):
    """block until something happens on any file descriptor

    This is a generic helper that will check for any activity
    (read, write.  exception) and return the list of touched files.

    In unsupported cases, it will raise a NotImplementedError"""
    try:
        while True:
            try:
                res = select.select(fds, fds, fds)
                break
            except select.error as inst:
                if inst.args[0] == errno.EINTR:
                    continue
                raise
    except ValueError: # out of range file descriptor
        raise NotImplementedError()
    return sorted(list(set(sum(res, []))))

def readpipe(pipe):
    """Read all available data from a pipe."""
    # We can't fstat() a pipe because Linux will always report 0.
    # So, we set the pipe to non-blocking mode and read everything
    # that's available.
    flags = fcntl.fcntl(pipe, fcntl.F_GETFL)
    flags |= os.O_NONBLOCK
    oldflags = fcntl.fcntl(pipe, fcntl.F_SETFL, flags)

    try:
        chunks = []
        while True:
            try:
                s = pipe.read()
                if not s:
                    break
                chunks.append(s)
            except IOError:
                break

        return ''.join(chunks)
    finally:
        fcntl.fcntl(pipe, fcntl.F_SETFL, oldflags)

def bindunixsocket(sock, path):
    """Bind the UNIX domain socket to the specified path"""
    # use relative path instead of full path at bind() if possible, since
    # AF_UNIX path has very small length limit (107 chars) on common
    # platforms (see sys/un.h)
    dirname, basename = os.path.split(path)
    bakwdfd = None
    if dirname:
        bakwdfd = os.open('.', os.O_DIRECTORY)
        os.chdir(dirname)
    sock.bind(basename)
    if bakwdfd:
        os.fchdir(bakwdfd)
        os.close(bakwdfd)