14
14
# along with this program; if not, write to the Free Software
15
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
from __future__ import absolute_import
20
from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
21
S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
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from bzrlib.lazy_import import lazy_import
28
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lazy_import(globals(), """
29
29
from datetime import datetime
31
from ntpath import (abspath as _nt_abspath,
33
normpath as _nt_normpath,
34
realpath as _nt_realpath,
35
splitdrive as _nt_splitdrive,
35
# We need to import both shutil and rmtree as we export the later on posix
36
# and need the former on windows
38
from shutil import rmtree
41
# We need to import both tempfile and mkdtemp as we export the later on posix
42
# and need the former on windows
45
from tempfile import (
44
from tempfile import mkdtemp
50
47
from bzrlib import (
54
from bzrlib.i18n import gettext
57
# sha and md5 modules are deprecated in python2.6 but hashlib is available as
59
if sys.version_info < (2, 5):
60
import md5 as _mod_md5
62
import sha as _mod_sha
57
from bzrlib.symbol_versioning import (
62
warn as warn_deprecated,
72
from bzrlib import symbol_versioning
72
from bzrlib import symbol_versioning, _fs_enc
75
75
# Cross platform wall-clock time functionality with decent resolution.
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mod = os.lstat(filename).st_mode
107
107
if not stat.S_ISLNK(mod):
108
108
mod = mod & 0777555
109
os.chmod(filename, mod)
109
chmod_if_possible(filename, mod)
112
112
def make_writable(filename):
113
113
mod = os.lstat(filename).st_mode
114
114
if not stat.S_ISLNK(mod):
116
os.chmod(filename, mod)
116
chmod_if_possible(filename, mod)
119
def chmod_if_possible(filename, mode):
120
# Set file mode if that can be safely done.
121
# Sometimes even on unix the filesystem won't allow it - see
122
# https://bugs.launchpad.net/bzr/+bug/606537
124
# It is probably faster to just do the chmod, rather than
125
# doing a stat, and then trying to compare
126
os.chmod(filename, mode)
127
except (IOError, OSError),e:
128
# Permission/access denied seems to commonly happen on smbfs; there's
129
# probably no point warning about it.
130
# <https://bugs.launchpad.net/bzr/+bug/606537>
131
if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
132
trace.mutter("ignore error on chmod of %r: %r" % (
119
138
def minimum_path_selection(paths):
271
290
rename_func(tmp_name, new)
272
291
if failure_exc is not None:
273
raise failure_exc[0], failure_exc[1], failure_exc[2]
293
raise failure_exc[0], failure_exc[1], failure_exc[2]
276
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# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
277
299
# choke on a Unicode string containing a relative path if
278
300
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
280
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
281
302
def _posix_abspath(path):
282
303
# jam 20060426 rather than encoding to fsencoding
283
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# copy posixpath.abspath, but use os.getcwdu instead
284
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if not posixpath.isabs(path):
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path = posixpath.join(getcwd(), path)
286
return posixpath.normpath(path)
307
return _posix_normpath(path)
289
310
def _posix_realpath(path):
290
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return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
314
def _posix_normpath(path):
315
path = posixpath.normpath(path)
316
# Bug 861008: posixpath.normpath() returns a path normalized according to
317
# the POSIX standard, which stipulates (for compatibility reasons) that two
318
# leading slashes must not be simplified to one, and only if there are 3 or
319
# more should they be simplified as one. So we treat the leading 2 slashes
320
# as a special case here by simply removing the first slash, as we consider
321
# that breaking POSIX compatibility for this obscure feature is acceptable.
322
# This is not a paranoid precaution, as we notably get paths like this when
323
# the repo is hosted at the root of the filesystem, i.e. in "/".
324
if path.startswith('//'):
329
def _posix_path_from_environ(key):
330
"""Get unicode path from `key` in environment or None if not present
332
Note that posix systems use arbitrary byte strings for filesystem objects,
333
so a path that raises BadFilenameEncoding here may still be accessible.
335
val = os.environ.get(key, None)
339
return val.decode(_fs_enc)
340
except UnicodeDecodeError:
341
# GZ 2011-12-12:Ideally want to include `key` in the exception message
342
raise errors.BadFilenameEncoding(val, _fs_enc)
345
def _posix_get_home_dir():
346
"""Get the home directory of the current user as a unicode path"""
347
path = posixpath.expanduser("~")
349
return path.decode(_fs_enc)
350
except UnicodeDecodeError:
351
raise errors.BadFilenameEncoding(path, _fs_enc)
354
def _posix_getuser_unicode():
355
"""Get username from environment or password database as unicode"""
356
name = getpass.getuser()
357
user_encoding = get_user_encoding()
359
return name.decode(user_encoding)
360
except UnicodeDecodeError:
361
raise errors.BzrError("Encoding of username %r is unsupported by %s "
362
"application locale." % (name, user_encoding))
293
365
def _win32_fixdrive(path):
294
366
"""Force drive letters to be consistent.
322
394
# /path => C:/path
323
395
path = unicode(path)
324
396
# check for absolute path
325
drive = _nt_splitdrive(path)[0]
397
drive = ntpath.splitdrive(path)[0]
326
398
if drive == '' and path[:2] not in('//','\\\\'):
327
399
cwd = os.getcwdu()
328
400
# we cannot simply os.path.join cwd and path
329
401
# because os.path.join('C:','/path') produce '/path'
330
402
# and this is incorrect
331
403
if path[:1] in ('/','\\'):
332
cwd = _nt_splitdrive(cwd)[0]
404
cwd = ntpath.splitdrive(cwd)[0]
334
406
path = cwd + '\\' + path
335
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
407
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
338
410
def _win32_realpath(path):
339
# Real _nt_realpath doesn't have a problem with a unicode cwd
340
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
411
# Real ntpath.realpath doesn't have a problem with a unicode cwd
412
return _win32_fixdrive(ntpath.realpath(unicode(path)).replace('\\', '/'))
343
415
def _win32_pathjoin(*args):
344
return _nt_join(*args).replace('\\', '/')
416
return ntpath.join(*args).replace('\\', '/')
347
419
def _win32_normpath(path):
348
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
420
return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
351
423
def _win32_getcwd():
378
450
return unicodedata.normalize('NFC', os.getcwdu())
453
def _rename_wrap_exception(rename_func):
454
"""Adds extra information to any exceptions that come from rename().
456
The exception has an updated message and 'old_filename' and 'new_filename'
460
def _rename_wrapper(old, new):
462
rename_func(old, new)
464
detailed_error = OSError(e.errno, e.strerror +
465
" [occurred when renaming '%s' to '%s']" %
467
detailed_error.old_filename = old
468
detailed_error.new_filename = new
471
return _rename_wrapper
473
# Default rename wraps os.rename()
474
rename = _rename_wrap_exception(os.rename)
381
476
# Default is to just use the python builtins, but these can be rebound on
382
477
# particular platforms.
383
478
abspath = _posix_abspath
384
479
realpath = _posix_realpath
385
480
pathjoin = os.path.join
386
normpath = os.path.normpath
481
normpath = _posix_normpath
482
path_from_environ = _posix_path_from_environ
483
_get_home_dir = _posix_get_home_dir
484
getuser_unicode = _posix_getuser_unicode
387
485
getcwd = os.getcwdu
389
486
dirname = os.path.dirname
390
487
basename = os.path.basename
391
488
split = os.path.split
392
489
splitext = os.path.splitext
393
# These were already imported into local scope
490
# These were already lazily imported into local scope
394
491
# mkdtemp = tempfile.mkdtemp
395
492
# rmtree = shutil.rmtree
397
500
MIN_ABS_PATHLENGTH = 1
455
571
input_encoding = getattr(sys.stdin, 'encoding', None)
456
572
if not input_encoding:
457
573
output_encoding = get_user_encoding()
458
mutter('encoding stdout as osutils.get_user_encoding() %r',
575
mutter('encoding stdout as osutils.get_user_encoding() %r',
461
578
output_encoding = input_encoding
462
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
580
mutter('encoding stdout as sys.stdin encoding %r',
464
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
584
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
465
585
if output_encoding == 'cp0':
466
586
# invalid encoding (cp0 means 'no codepage' on Windows)
467
587
output_encoding = get_user_encoding()
468
mutter('cp0 is invalid encoding.'
589
mutter('cp0 is invalid encoding.'
469
590
' encoding stdout as osutils.get_user_encoding() %r',
860
981
"""Return size of given open file."""
861
return os.fstat(f.fileno())[ST_SIZE]
864
# Define rand_bytes based on platform.
866
# Python 2.4 and later have os.urandom,
867
# but it doesn't work on some arches
869
rand_bytes = os.urandom
870
except (NotImplementedError, AttributeError):
871
# If python doesn't have os.urandom, or it doesn't work,
872
# then try to first pull random data from /dev/urandom
982
return os.fstat(f.fileno())[stat.ST_SIZE]
985
# Alias os.urandom to support platforms (which?) without /dev/urandom and
986
# override if it doesn't work. Avoid checking on windows where there is
987
# significant initialisation cost that can be avoided for some bzr calls.
989
rand_bytes = os.urandom
991
if rand_bytes.__module__ != "nt":
874
rand_bytes = file('/dev/urandom', 'rb').read
875
# Otherwise, use this hack as a last resort
876
except (IOError, OSError):
994
except NotImplementedError:
877
995
# not well seeded, but better than nothing
878
996
def rand_bytes(n):
1225
1344
# but for now, we haven't optimized...
1226
1345
return [canonical_relpath(base, p) for p in paths]
1348
def decode_filename(filename):
1349
"""Decode the filename using the filesystem encoding
1351
If it is unicode, it is returned.
1352
Otherwise it is decoded from the the filesystem's encoding. If decoding
1353
fails, a errors.BadFilenameEncoding exception is raised.
1355
if type(filename) is unicode:
1358
return filename.decode(_fs_enc)
1359
except UnicodeDecodeError:
1360
raise errors.BadFilenameEncoding(filename, _fs_enc)
1228
1363
def safe_unicode(unicode_or_utf8_string):
1229
1364
"""Coerce unicode_or_utf8_string into unicode.
1349
1484
normalized_filename = _inaccessible_normalized_filename
1487
def set_signal_handler(signum, handler, restart_syscall=True):
1488
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1489
on platforms that support that.
1491
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1492
automatically restart (by calling `signal.siginterrupt(signum,
1493
False)`). May be ignored if the feature is not available on this
1494
platform or Python version.
1498
siginterrupt = signal.siginterrupt
1500
# This python implementation doesn't provide signal support, hence no
1503
except AttributeError:
1504
# siginterrupt doesn't exist on this platform, or for this version
1506
siginterrupt = lambda signum, flag: None
1508
def sig_handler(*args):
1509
# Python resets the siginterrupt flag when a signal is
1510
# received. <http://bugs.python.org/issue8354>
1511
# As a workaround for some cases, set it back the way we want it.
1512
siginterrupt(signum, False)
1513
# Now run the handler function passed to set_signal_handler.
1516
sig_handler = handler
1517
old_handler = signal.signal(signum, sig_handler)
1519
siginterrupt(signum, False)
1352
1523
default_terminal_width = 80
1353
1524
"""The default terminal width for ttys.
1366
1543
- if BZR_COLUMNS is set, returns its value
1367
1544
- if there is no controlling terminal, returns None
1545
- query the OS, if the queried size has changed since the last query,
1368
1547
- if COLUMNS is set, returns its value,
1548
- if the OS has a value (even though it's never changed), return its value.
1370
1550
From there, we need to query the OS to get the size of the controlling
1553
On Unices we query the OS by:
1374
1554
- get termios.TIOCGWINSZ
1375
1555
- if an error occurs or a negative value is obtained, returns None
1557
On Windows we query the OS by:
1379
1558
- win32utils.get_console_size() decides,
1380
1559
- returns None on error (provided default value)
1561
# Note to implementors: if changing the rules for determining the width,
1562
# make sure you've considered the behaviour in these cases:
1563
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1564
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1566
# - (add more interesting cases here, if you find any)
1567
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1568
# but we don't want to register a signal handler because it is impossible
1569
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1570
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1571
# time so we can notice if the reported size has changed, which should have
1383
1574
# If BZR_COLUMNS is set, take it, user is always right
1575
# Except if they specified 0 in which case, impose no limit here
1385
return int(os.environ['BZR_COLUMNS'])
1577
width = int(os.environ['BZR_COLUMNS'])
1386
1578
except (KeyError, ValueError):
1580
if width is not None:
1389
1586
isatty = getattr(sys.stdout, 'isatty', None)
1390
if isatty is None or not isatty():
1587
if isatty is None or not isatty():
1391
1588
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1394
# If COLUMNS is set, take it, the terminal knows better (even inside a
1395
# given terminal, the application can decide to set COLUMNS to a lower
1396
# value (splitted screen) or a bigger value (scroll bars))
1592
width, height = os_size = _terminal_size(None, None)
1593
global _first_terminal_size, _terminal_size_state
1594
if _terminal_size_state == 'no_data':
1595
_first_terminal_size = os_size
1596
_terminal_size_state = 'unchanged'
1597
elif (_terminal_size_state == 'unchanged' and
1598
_first_terminal_size != os_size):
1599
_terminal_size_state = 'changed'
1601
# If the OS claims to know how wide the terminal is, and this value has
1602
# ever changed, use that.
1603
if _terminal_size_state == 'changed':
1604
if width is not None and width > 0:
1607
# If COLUMNS is set, use it.
1398
1609
return int(os.environ['COLUMNS'])
1399
1610
except (KeyError, ValueError):
1402
width, height = _terminal_size(None, None)
1404
# Consider invalid values as meaning no width
1613
# Finally, use an unchanged size from the OS, if we have one.
1614
if _terminal_size_state == 'unchanged':
1615
if width is not None and width > 0:
1618
# The width could not be determined.
1410
1622
def _win32_terminal_size(width, height):
1437
1649
_terminal_size = _ioctl_terminal_size
1440
def _terminal_size_changed(signum, frame):
1441
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1442
width, height = _terminal_size(None, None)
1443
if width is not None:
1444
os.environ['COLUMNS'] = str(width)
1447
_registered_sigwinch = False
1449
def watch_sigwinch():
1450
"""Register for SIGWINCH, once and only once."""
1451
global _registered_sigwinch
1452
if not _registered_sigwinch:
1453
if sys.platform == 'win32':
1454
# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from
1455
# ReadConsoleInput but I've no idea how to plug that in
1456
# the current design -- vila 20091216
1459
signal.signal(signal.SIGWINCH, _terminal_size_changed)
1460
_registered_sigwinch = True
1463
1652
def supports_executable():
1464
1653
return sys.platform != "win32"
1783
1970
real_handlers[kind](abspath, relpath)
1973
def copy_ownership_from_path(dst, src=None):
1974
"""Copy usr/grp ownership from src file/dir to dst file/dir.
1976
If src is None, the containing directory is used as source. If chown
1977
fails, the error is ignored and a warning is printed.
1979
chown = getattr(os, 'chown', None)
1984
src = os.path.dirname(dst)
1990
chown(dst, s.st_uid, s.st_gid)
1993
'Unable to copy ownership from "%s" to "%s". '
1994
'You may want to set it manually.', src, dst)
1995
trace.log_exception_quietly()
1786
1998
def path_prefix_key(path):
1787
1999
"""Generate a prefix-order path key for path.
1801
2013
_cached_user_encoding = None
1804
def get_user_encoding(use_cache=True):
2016
def get_user_encoding(use_cache=DEPRECATED_PARAMETER):
1805
2017
"""Find out what the preferred user encoding is.
1807
2019
This is generally the encoding that is used for command line parameters
1808
2020
and file contents. This may be different from the terminal encoding
1809
2021
or the filesystem encoding.
1811
:param use_cache: Enable cache for detected encoding.
1812
(This parameter is turned on by default,
1813
and required only for selftesting)
1815
2023
:return: A string defining the preferred user encoding
1817
2025
global _cached_user_encoding
1818
if _cached_user_encoding is not None and use_cache:
2026
if deprecated_passed(use_cache):
2027
warn_deprecated("use_cache should only have been used for tests",
2028
DeprecationWarning, stacklevel=2)
2029
if _cached_user_encoding is not None:
1819
2030
return _cached_user_encoding
1821
if sys.platform == 'darwin':
1822
# python locale.getpreferredencoding() always return
1823
# 'mac-roman' on darwin. That's a lie.
1824
sys.platform = 'posix'
1826
if os.environ.get('LANG', None) is None:
1827
# If LANG is not set, we end up with 'ascii', which is bad
1828
# ('mac-roman' is more than ascii), so we set a default which
1829
# will give us UTF-8 (which appears to work in all cases on
1830
# OSX). Users are still free to override LANG of course, as
1831
# long as it give us something meaningful. This work-around
1832
# *may* not be needed with python 3k and/or OSX 10.5, but will
1833
# work with them too -- vila 20080908
1834
os.environ['LANG'] = 'en_US.UTF-8'
1837
sys.platform = 'darwin'
2032
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2033
# Use the existing locale settings and call nl_langinfo directly
2034
# rather than going through getpreferredencoding. This avoids
2035
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2036
# possibility of the setlocale call throwing an error.
2037
user_encoding = locale.nl_langinfo(locale.CODESET)
2039
# GZ 2011-12-19: On windows could call GetACP directly instead.
2040
user_encoding = locale.getpreferredencoding(False)
1842
user_encoding = locale.getpreferredencoding()
1843
except locale.Error, e:
1844
sys.stderr.write('bzr: warning: %s\n'
1845
' Could not determine what text encoding to use.\n'
1846
' This error usually means your Python interpreter\n'
1847
' doesn\'t support the locale set by $LANG (%s)\n'
1848
" Continuing with ascii encoding.\n"
1849
% (e, os.environ.get('LANG')))
1850
user_encoding = 'ascii'
1852
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1853
# treat that as ASCII, and not support printing unicode characters to the
1856
# For python scripts run under vim, we get '', so also treat that as ASCII
1857
if user_encoding in (None, 'cp0', ''):
1858
user_encoding = 'ascii'
1862
codecs.lookup(user_encoding)
2043
user_encoding = codecs.lookup(user_encoding).name
2045
if user_encoding not in ("", "cp0"):
1864
2046
sys.stderr.write('bzr: warning:'
1865
2047
' unknown encoding %s.'
1866
2048
' Continuing with ascii encoding.\n'
1867
2049
% user_encoding
1869
user_encoding = 'ascii'
1872
_cached_user_encoding = user_encoding
2051
user_encoding = 'ascii'
2053
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2054
if user_encoding == 'ascii':
2055
if sys.platform == 'darwin':
2056
# OSX is special-cased in Python to have a UTF-8 filesystem
2057
# encoding and previously had LANG set here if not present.
2058
user_encoding = 'utf-8'
2059
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2060
# for some other posix platforms as well.
2062
_cached_user_encoding = user_encoding
1874
2063
return user_encoding
2066
def get_diff_header_encoding():
2067
return get_terminal_encoding()
1877
2070
def get_host_name():
1878
2071
"""Return the current unicode host name.
1881
2074
behaves inconsistently on different platforms.
1883
2076
if sys.platform == "win32":
1885
2077
return win32utils.get_host_name()
1888
2080
return socket.gethostname().decode(get_user_encoding())
1891
def recv_all(socket, bytes):
2083
# We must not read/write any more than 64k at a time from/to a socket so we
2084
# don't risk "no buffer space available" errors on some platforms. Windows in
2085
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
2087
MAX_SOCKET_CHUNK = 64 * 1024
2089
_end_of_stream_errors = [errno.ECONNRESET]
2090
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2091
_eno = getattr(errno, _eno, None)
2092
if _eno is not None:
2093
_end_of_stream_errors.append(_eno)
2097
def read_bytes_from_socket(sock, report_activity=None,
2098
max_read_size=MAX_SOCKET_CHUNK):
2099
"""Read up to max_read_size of bytes from sock and notify of progress.
2101
Translates "Connection reset by peer" into file-like EOF (return an
2102
empty string rather than raise an error), and repeats the recv if
2103
interrupted by a signal.
2107
bytes = sock.recv(max_read_size)
2108
except socket.error, e:
2110
if eno in _end_of_stream_errors:
2111
# The connection was closed by the other side. Callers expect
2112
# an empty string to signal end-of-stream.
2114
elif eno == errno.EINTR:
2115
# Retry the interrupted recv.
2119
if report_activity is not None:
2120
report_activity(len(bytes), 'read')
2124
def recv_all(socket, count):
1892
2125
"""Receive an exact number of bytes.
1894
2127
Regular Socket.recv() may return less than the requested number of bytes,
1895
dependning on what's in the OS buffer. MSG_WAITALL is not available
2128
depending on what's in the OS buffer. MSG_WAITALL is not available
1896
2129
on all platforms, but this should work everywhere. This will return
1897
2130
less than the requested amount if the remote end closes.
1899
2132
This isn't optimized and is intended mostly for use in testing.
1902
while len(b) < bytes:
1903
new = until_no_eintr(socket.recv, bytes - len(b))
2135
while len(b) < count:
2136
new = read_bytes_from_socket(socket, None, count - len(b))
1910
def send_all(socket, bytes, report_activity=None):
2143
def send_all(sock, bytes, report_activity=None):
1911
2144
"""Send all bytes on a socket.
1913
Regular socket.sendall() can give socket error 10053 on Windows. This
1914
implementation sends no more than 64k at a time, which avoids this problem.
2146
Breaks large blocks in smaller chunks to avoid buffering limitations on
2147
some platforms, and catches EINTR which may be thrown if the send is
2148
interrupted by a signal.
2150
This is preferred to socket.sendall(), because it avoids portability bugs
2151
and provides activity reporting.
1916
2153
:param report_activity: Call this as bytes are read, see
1917
2154
Transport._report_activity
1920
for pos in xrange(0, len(bytes), chunk_size):
1921
block = bytes[pos:pos+chunk_size]
1922
if report_activity is not None:
1923
report_activity(len(block), 'write')
1924
until_no_eintr(socket.sendall, block)
2157
byte_count = len(bytes)
2158
while sent_total < byte_count:
2160
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2161
except socket.error, e:
2162
if e.args[0] != errno.EINTR:
2166
report_activity(sent, 'write')
2169
def connect_socket(address):
2170
# Slight variation of the socket.create_connection() function (provided by
2171
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2172
# provide it for previous python versions. Also, we don't use the timeout
2173
# parameter (provided by the python implementation) so we don't implement
2175
err = socket.error('getaddrinfo returns an empty list')
2176
host, port = address
2177
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2178
af, socktype, proto, canonname, sa = res
2181
sock = socket.socket(af, socktype, proto)
2185
except socket.error, err:
2186
# 'err' is now the most recent error
2187
if sock is not None:
1927
2192
def dereference_path(path):
1987
2254
return file_kind_from_stat_mode(mode)
1988
2255
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
1991
def file_kind(f, _lstat=os.lstat):
2257
def file_stat(f, _lstat=os.lstat):
1993
return file_kind_from_stat_mode(_lstat(f).st_mode)
1994
2261
except OSError, e:
1995
2262
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
1996
2263
raise errors.NoSuchFile(f)
2266
def file_kind(f, _lstat=os.lstat):
2267
stat_value = file_stat(f, _lstat)
2268
return file_kind_from_stat_mode(stat_value.st_mode)
2000
2270
def until_no_eintr(f, *a, **kw):
2001
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2271
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2273
WARNING: you must be certain that it is safe to retry the call repeatedly
2274
if EINTR does occur. This is typically only true for low-level operations
2275
like os.read. If in any doubt, don't use this.
2277
Keep in mind that this is not a complete solution to EINTR. There is
2278
probably code in the Python standard library and other dependencies that
2279
may encounter EINTR if a signal arrives (and there is signal handler for
2280
that signal). So this function can reduce the impact for IO that bzrlib
2281
directly controls, but it is not a complete solution.
2002
2283
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2048
2331
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2052
if sys.platform == 'linux2':
2334
if sys.platform.startswith('linux'):
2053
2335
def _local_concurrency():
2055
prefix = 'processor'
2056
for line in file('/proc/cpuinfo', 'rb'):
2057
if line.startswith(prefix):
2058
concurrency = int(line[line.find(':')+1:]) + 1
2337
return os.sysconf('SC_NPROCESSORS_ONLN')
2338
except (ValueError, OSError, AttributeError):
2060
2340
elif sys.platform == 'darwin':
2061
2341
def _local_concurrency():
2062
2342
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2063
2343
stdout=subprocess.PIPE).communicate()[0]
2064
elif sys.platform[0:7] == 'freebsd':
2344
elif "bsd" in sys.platform:
2065
2345
def _local_concurrency():
2066
2346
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2067
2347
stdout=subprocess.PIPE).communicate()[0]
2163
2450
return os.fdopen(os.open(filename, flags), mode, bufsize)
2165
2452
open_file = open
2455
def available_backup_name(base, exists):
2456
"""Find a non-existing backup file name.
2458
This will *not* create anything, this only return a 'free' entry. This
2459
should be used for checking names in a directory below a locked
2460
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2461
Leap) and generally discouraged.
2463
:param base: The base name.
2465
:param exists: A callable returning True if the path parameter exists.
2468
name = "%s.~%d~" % (base, counter)
2471
name = "%s.~%d~" % (base, counter)
2475
def set_fd_cloexec(fd):
2476
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2477
support for this is not available.
2481
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2482
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2483
except (ImportError, AttributeError):
2484
# Either the fcntl module or specific constants are not present
2488
def find_executable_on_path(name):
2489
"""Finds an executable on the PATH.
2491
On Windows, this will try to append each extension in the PATHEXT
2492
environment variable to the name, if it cannot be found with the name
2495
:param name: The base name of the executable.
2496
:return: The path to the executable found or None.
2498
if sys.platform == 'win32':
2499
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2500
exts = [ext.lower() for ext in exts]
2501
base, ext = os.path.splitext(name)
2503
if ext.lower() not in exts:
2509
path = os.environ.get('PATH')
2510
if path is not None:
2511
path = path.split(os.pathsep)
2514
f = os.path.join(d, name) + ext
2515
if os.access(f, os.X_OK):
2517
if sys.platform == 'win32':
2518
app_path = win32utils.get_app_path(name)
2519
if app_path != name:
2524
def _posix_is_local_pid_dead(pid):
2525
"""True if pid doesn't correspond to live process on this machine"""
2527
# Special meaning of unix kill: just check if it's there.
2530
if e.errno == errno.ESRCH:
2531
# On this machine, and really not found: as sure as we can be
2534
elif e.errno == errno.EPERM:
2535
# exists, though not ours
2538
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2539
# Don't really know.
2542
# Exists and our process: not dead.
2545
if sys.platform == "win32":
2546
is_local_pid_dead = win32utils.is_local_pid_dead
2548
is_local_pid_dead = _posix_is_local_pid_dead
2551
def fdatasync(fileno):
2552
"""Flush file contents to disk if possible.
2554
:param fileno: Integer OS file handle.
2555
:raises TransportNotPossible: If flushing to disk is not possible.
2557
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2562
def ensure_empty_directory_exists(path, exception_class):
2563
"""Make sure a local directory exists and is empty.
2565
If it does not exist, it is created. If it exists and is not empty, an
2566
instance of exception_class is raised.
2571
if e.errno != errno.EEXIST:
2573
if os.listdir(path) != []:
2574
raise exception_class(path)
2577
def is_environment_error(evalue):
2578
"""True if exception instance is due to a process environment issue
2580
This includes OSError and IOError, but also other errors that come from
2581
the operating system or core libraries but are not subclasses of those.
2583
if isinstance(evalue, (EnvironmentError, select.error)):
2585
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
added
removed
bzrlib/osutils.py
