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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27
from bzrlib.lazy_import import lazy_import
28
28
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.
103
106
mod = os.lstat(filename).st_mode
104
107
if not stat.S_ISLNK(mod):
105
108
mod = mod & 0777555
106
os.chmod(filename, mod)
109
chmod_if_possible(filename, mod)
109
112
def make_writable(filename):
110
113
mod = os.lstat(filename).st_mode
111
114
if not stat.S_ISLNK(mod):
113
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" % (
116
138
def minimum_path_selection(paths):
268
290
rename_func(tmp_name, new)
269
291
if failure_exc is not None:
270
raise failure_exc[0], failure_exc[1], failure_exc[2]
293
raise failure_exc[0], failure_exc[1], failure_exc[2]
273
298
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
274
299
# choke on a Unicode string containing a relative path if
275
300
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
277
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
278
302
def _posix_abspath(path):
279
303
# jam 20060426 rather than encoding to fsencoding
280
304
# copy posixpath.abspath, but use os.getcwdu instead
281
305
if not posixpath.isabs(path):
282
306
path = posixpath.join(getcwd(), path)
283
return posixpath.normpath(path)
307
return _posix_normpath(path)
286
310
def _posix_realpath(path):
287
311
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))
290
365
def _win32_fixdrive(path):
291
366
"""Force drive letters to be consistent.
319
394
# /path => C:/path
320
395
path = unicode(path)
321
396
# check for absolute path
322
drive = _nt_splitdrive(path)[0]
397
drive = ntpath.splitdrive(path)[0]
323
398
if drive == '' and path[:2] not in('//','\\\\'):
324
399
cwd = os.getcwdu()
325
400
# we cannot simply os.path.join cwd and path
326
401
# because os.path.join('C:','/path') produce '/path'
327
402
# and this is incorrect
328
403
if path[:1] in ('/','\\'):
329
cwd = _nt_splitdrive(cwd)[0]
404
cwd = ntpath.splitdrive(cwd)[0]
331
406
path = cwd + '\\' + path
332
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
407
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
335
410
def _win32_realpath(path):
336
# Real _nt_realpath doesn't have a problem with a unicode cwd
337
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('\\', '/'))
340
415
def _win32_pathjoin(*args):
341
return _nt_join(*args).replace('\\', '/')
416
return ntpath.join(*args).replace('\\', '/')
344
419
def _win32_normpath(path):
345
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
420
return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
348
423
def _win32_getcwd():
375
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)
378
476
# Default is to just use the python builtins, but these can be rebound on
379
477
# particular platforms.
380
478
abspath = _posix_abspath
381
479
realpath = _posix_realpath
382
480
pathjoin = os.path.join
383
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
384
485
getcwd = os.getcwdu
386
486
dirname = os.path.dirname
387
487
basename = os.path.basename
388
488
split = os.path.split
389
489
splitext = os.path.splitext
390
# These were already imported into local scope
490
# These were already lazily imported into local scope
391
491
# mkdtemp = tempfile.mkdtemp
392
492
# rmtree = shutil.rmtree
394
500
MIN_ABS_PATHLENGTH = 1
452
571
input_encoding = getattr(sys.stdin, 'encoding', None)
453
572
if not input_encoding:
454
573
output_encoding = get_user_encoding()
455
mutter('encoding stdout as osutils.get_user_encoding() %r',
575
mutter('encoding stdout as osutils.get_user_encoding() %r',
458
578
output_encoding = input_encoding
459
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
580
mutter('encoding stdout as sys.stdin encoding %r',
461
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
584
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
462
585
if output_encoding == 'cp0':
463
586
# invalid encoding (cp0 means 'no codepage' on Windows)
464
587
output_encoding = get_user_encoding()
465
mutter('cp0 is invalid encoding.'
589
mutter('cp0 is invalid encoding.'
466
590
' encoding stdout as osutils.get_user_encoding() %r',
857
981
"""Return size of given open file."""
858
return os.fstat(f.fileno())[ST_SIZE]
861
# Define rand_bytes based on platform.
863
# Python 2.4 and later have os.urandom,
864
# but it doesn't work on some arches
866
rand_bytes = os.urandom
867
except (NotImplementedError, AttributeError):
868
# If python doesn't have os.urandom, or it doesn't work,
869
# 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":
871
rand_bytes = file('/dev/urandom', 'rb').read
872
# Otherwise, use this hack as a last resort
873
except (IOError, OSError):
994
except NotImplementedError:
874
995
# not well seeded, but better than nothing
875
996
def rand_bytes(n):
1346
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)
1349
1523
default_terminal_width = 80
1350
1524
"""The default terminal width for ttys.
1363
1543
- if BZR_COLUMNS is set, returns its value
1364
1544
- if there is no controlling terminal, returns None
1545
- query the OS, if the queried size has changed since the last query,
1365
1547
- if COLUMNS is set, returns its value,
1548
- if the OS has a value (even though it's never changed), return its value.
1367
1550
From there, we need to query the OS to get the size of the controlling
1553
On Unices we query the OS by:
1371
1554
- get termios.TIOCGWINSZ
1372
1555
- if an error occurs or a negative value is obtained, returns None
1557
On Windows we query the OS by:
1376
1558
- win32utils.get_console_size() decides,
1377
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
1380
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
1382
return int(os.environ['BZR_COLUMNS'])
1577
width = int(os.environ['BZR_COLUMNS'])
1383
1578
except (KeyError, ValueError):
1580
if width is not None:
1386
1586
isatty = getattr(sys.stdout, 'isatty', None)
1387
if isatty is None or not isatty():
1587
if isatty is None or not isatty():
1388
1588
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1391
# If COLUMNS is set, take it, the terminal knows better (even inside a
1392
# given terminal, the application can decide to set COLUMNS to a lower
1393
# 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.
1395
1609
return int(os.environ['COLUMNS'])
1396
1610
except (KeyError, ValueError):
1399
width, height = _terminal_size(None, None)
1401
# 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.
1407
1622
def _win32_terminal_size(width, height):
1434
1649
_terminal_size = _ioctl_terminal_size
1437
def _terminal_size_changed(signum, frame):
1438
"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
1439
width, height = _terminal_size(None, None)
1440
if width is not None:
1441
os.environ['COLUMNS'] = str(width)
1444
_registered_sigwinch = False
1446
def watch_sigwinch():
1447
"""Register for SIGWINCH, once and only once."""
1448
global _registered_sigwinch
1449
if not _registered_sigwinch:
1450
if sys.platform == 'win32':
1451
# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from
1452
# ReadConsoleInput but I've no idea how to plug that in
1453
# the current design -- vila 20091216
1456
signal.signal(signal.SIGWINCH, _terminal_size_changed)
1457
_registered_sigwinch = True
1460
1652
def supports_executable():
1461
1653
return sys.platform != "win32"
1798
2013
_cached_user_encoding = None
1801
def get_user_encoding(use_cache=True):
2016
def get_user_encoding(use_cache=DEPRECATED_PARAMETER):
1802
2017
"""Find out what the preferred user encoding is.
1804
2019
This is generally the encoding that is used for command line parameters
1805
2020
and file contents. This may be different from the terminal encoding
1806
2021
or the filesystem encoding.
1808
:param use_cache: Enable cache for detected encoding.
1809
(This parameter is turned on by default,
1810
and required only for selftesting)
1812
2023
:return: A string defining the preferred user encoding
1814
2025
global _cached_user_encoding
1815
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:
1816
2030
return _cached_user_encoding
1818
if sys.platform == 'darwin':
1819
# python locale.getpreferredencoding() always return
1820
# 'mac-roman' on darwin. That's a lie.
1821
sys.platform = 'posix'
1823
if os.environ.get('LANG', None) is None:
1824
# If LANG is not set, we end up with 'ascii', which is bad
1825
# ('mac-roman' is more than ascii), so we set a default which
1826
# will give us UTF-8 (which appears to work in all cases on
1827
# OSX). Users are still free to override LANG of course, as
1828
# long as it give us something meaningful. This work-around
1829
# *may* not be needed with python 3k and/or OSX 10.5, but will
1830
# work with them too -- vila 20080908
1831
os.environ['LANG'] = 'en_US.UTF-8'
1834
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)
1839
user_encoding = locale.getpreferredencoding()
1840
except locale.Error, e:
1841
sys.stderr.write('bzr: warning: %s\n'
1842
' Could not determine what text encoding to use.\n'
1843
' This error usually means your Python interpreter\n'
1844
' doesn\'t support the locale set by $LANG (%s)\n'
1845
" Continuing with ascii encoding.\n"
1846
% (e, os.environ.get('LANG')))
1847
user_encoding = 'ascii'
1849
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1850
# treat that as ASCII, and not support printing unicode characters to the
1853
# For python scripts run under vim, we get '', so also treat that as ASCII
1854
if user_encoding in (None, 'cp0', ''):
1855
user_encoding = 'ascii'
1859
codecs.lookup(user_encoding)
2043
user_encoding = codecs.lookup(user_encoding).name
2045
if user_encoding not in ("", "cp0"):
1861
2046
sys.stderr.write('bzr: warning:'
1862
2047
' unknown encoding %s.'
1863
2048
' Continuing with ascii encoding.\n'
1864
2049
% user_encoding
1866
user_encoding = 'ascii'
1869
_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
1871
2063
return user_encoding
2066
def get_diff_header_encoding():
2067
return get_terminal_encoding()
1874
2070
def get_host_name():
1875
2071
"""Return the current unicode host name.
1878
2074
behaves inconsistently on different platforms.
1880
2076
if sys.platform == "win32":
1882
2077
return win32utils.get_host_name()
1885
2080
return socket.gethostname().decode(get_user_encoding())
1888
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, errno.EPIPE, errno.EINVAL]
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):
1889
2125
"""Receive an exact number of bytes.
1891
2127
Regular Socket.recv() may return less than the requested number of bytes,
1892
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
1893
2129
on all platforms, but this should work everywhere. This will return
1894
2130
less than the requested amount if the remote end closes.
1896
2132
This isn't optimized and is intended mostly for use in testing.
1899
while len(b) < bytes:
1900
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))
1907
def send_all(socket, bytes, report_activity=None):
2143
def send_all(sock, bytes, report_activity=None):
1908
2144
"""Send all bytes on a socket.
1910
Regular socket.sendall() can give socket error 10053 on Windows. This
1911
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.
1913
2153
:param report_activity: Call this as bytes are read, see
1914
2154
Transport._report_activity
1917
for pos in xrange(0, len(bytes), chunk_size):
1918
block = bytes[pos:pos+chunk_size]
1919
if report_activity is not None:
1920
report_activity(len(block), 'write')
1921
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, IOError), e:
2162
if e.args[0] in _end_of_stream_errors:
2163
raise errors.ConnectionReset(
2164
"Error trying to write to socket", e)
2165
if e.args[0] != errno.EINTR:
2169
raise errors.ConnectionReset('Sending to %s returned 0 bytes'
2172
if report_activity is not None:
2173
report_activity(sent, 'write')
2176
def connect_socket(address):
2177
# Slight variation of the socket.create_connection() function (provided by
2178
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2179
# provide it for previous python versions. Also, we don't use the timeout
2180
# parameter (provided by the python implementation) so we don't implement
2182
err = socket.error('getaddrinfo returns an empty list')
2183
host, port = address
2184
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2185
af, socktype, proto, canonname, sa = res
2188
sock = socket.socket(af, socktype, proto)
2192
except socket.error, err:
2193
# 'err' is now the most recent error
2194
if sock is not None:
1924
2199
def dereference_path(path):
1984
2261
return file_kind_from_stat_mode(mode)
1985
2262
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
1988
def file_kind(f, _lstat=os.lstat):
2264
def file_stat(f, _lstat=os.lstat):
1990
return file_kind_from_stat_mode(_lstat(f).st_mode)
1991
2268
except OSError, e:
1992
2269
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
1993
2270
raise errors.NoSuchFile(f)
2273
def file_kind(f, _lstat=os.lstat):
2274
stat_value = file_stat(f, _lstat)
2275
return file_kind_from_stat_mode(stat_value.st_mode)
1997
2277
def until_no_eintr(f, *a, **kw):
1998
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2278
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2280
WARNING: you must be certain that it is safe to retry the call repeatedly
2281
if EINTR does occur. This is typically only true for low-level operations
2282
like os.read. If in any doubt, don't use this.
2284
Keep in mind that this is not a complete solution to EINTR. There is
2285
probably code in the Python standard library and other dependencies that
2286
may encounter EINTR if a signal arrives (and there is signal handler for
2287
that signal). So this function can reduce the impact for IO that bzrlib
2288
directly controls, but it is not a complete solution.
1999
2290
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2045
2338
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2049
if sys.platform == 'linux2':
2341
if sys.platform.startswith('linux'):
2050
2342
def _local_concurrency():
2052
prefix = 'processor'
2053
for line in file('/proc/cpuinfo', 'rb'):
2054
if line.startswith(prefix):
2055
concurrency = int(line[line.find(':')+1:]) + 1
2344
return os.sysconf('SC_NPROCESSORS_ONLN')
2345
except (ValueError, OSError, AttributeError):
2057
2347
elif sys.platform == 'darwin':
2058
2348
def _local_concurrency():
2059
2349
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2060
2350
stdout=subprocess.PIPE).communicate()[0]
2061
elif sys.platform[0:7] == 'freebsd':
2351
elif "bsd" in sys.platform:
2062
2352
def _local_concurrency():
2063
2353
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2064
2354
stdout=subprocess.PIPE).communicate()[0]
2118
2415
data, _ = self.encode(object, self.errors)
2119
2416
self.stream.write(data)
2418
if sys.platform == 'win32':
2419
def open_file(filename, mode='r', bufsize=-1):
2420
"""This function is used to override the ``open`` builtin.
2422
But it uses O_NOINHERIT flag so the file handle is not inherited by
2423
child processes. Deleting or renaming a closed file opened with this
2424
function is not blocking child processes.
2426
writing = 'w' in mode
2427
appending = 'a' in mode
2428
updating = '+' in mode
2429
binary = 'b' in mode
2432
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2433
# for flags for each modes.
2443
flags |= os.O_WRONLY
2444
flags |= os.O_CREAT | os.O_TRUNC
2449
flags |= os.O_WRONLY
2450
flags |= os.O_CREAT | os.O_APPEND
2455
flags |= os.O_RDONLY
2457
return os.fdopen(os.open(filename, flags), mode, bufsize)
2462
def available_backup_name(base, exists):
2463
"""Find a non-existing backup file name.
2465
This will *not* create anything, this only return a 'free' entry. This
2466
should be used for checking names in a directory below a locked
2467
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2468
Leap) and generally discouraged.
2470
:param base: The base name.
2472
:param exists: A callable returning True if the path parameter exists.
2475
name = "%s.~%d~" % (base, counter)
2478
name = "%s.~%d~" % (base, counter)
2482
def set_fd_cloexec(fd):
2483
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2484
support for this is not available.
2488
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2489
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2490
except (ImportError, AttributeError):
2491
# Either the fcntl module or specific constants are not present
2495
def find_executable_on_path(name):
2496
"""Finds an executable on the PATH.
2498
On Windows, this will try to append each extension in the PATHEXT
2499
environment variable to the name, if it cannot be found with the name
2502
:param name: The base name of the executable.
2503
:return: The path to the executable found or None.
2505
if sys.platform == 'win32':
2506
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2507
exts = [ext.lower() for ext in exts]
2508
base, ext = os.path.splitext(name)
2510
if ext.lower() not in exts:
2516
path = os.environ.get('PATH')
2517
if path is not None:
2518
path = path.split(os.pathsep)
2521
f = os.path.join(d, name) + ext
2522
if os.access(f, os.X_OK):
2524
if sys.platform == 'win32':
2525
app_path = win32utils.get_app_path(name)
2526
if app_path != name:
2531
def _posix_is_local_pid_dead(pid):
2532
"""True if pid doesn't correspond to live process on this machine"""
2534
# Special meaning of unix kill: just check if it's there.
2537
if e.errno == errno.ESRCH:
2538
# On this machine, and really not found: as sure as we can be
2541
elif e.errno == errno.EPERM:
2542
# exists, though not ours
2545
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2546
# Don't really know.
2549
# Exists and our process: not dead.
2552
if sys.platform == "win32":
2553
is_local_pid_dead = win32utils.is_local_pid_dead
2555
is_local_pid_dead = _posix_is_local_pid_dead
2557
_maybe_ignored = ['EAGAIN', 'EINTR', 'ENOTSUP', 'EOPNOTSUPP', 'EACCES']
2558
_fdatasync_ignored = [getattr(errno, name) for name in _maybe_ignored
2559
if getattr(errno, name, None) is not None]
2562
def fdatasync(fileno):
2563
"""Flush file contents to disk if possible.
2565
:param fileno: Integer OS file handle.
2566
:raises TransportNotPossible: If flushing to disk is not possible.
2568
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2573
# See bug #1075108, on some platforms fdatasync exists, but can
2574
# raise ENOTSUP. However, we are calling fdatasync to be helpful
2575
# and reduce the chance of corruption-on-powerloss situations. It
2576
# is not a mandatory call, so it is ok to suppress failures.
2577
trace.mutter("ignoring error calling fdatasync: %s" % (e,))
2578
if getattr(e, 'errno', None) not in _fdatasync_ignored:
2582
def ensure_empty_directory_exists(path, exception_class):
2583
"""Make sure a local directory exists and is empty.
2585
If it does not exist, it is created. If it exists and is not empty, an
2586
instance of exception_class is raised.
2591
if e.errno != errno.EEXIST:
2593
if os.listdir(path) != []:
2594
raise exception_class(path)
2597
def is_environment_error(evalue):
2598
"""True if exception instance is due to a process environment issue
2600
This includes OSError and IOError, but also other errors that come from
2601
the operating system or core libraries but are not subclasses of those.
2603
if isinstance(evalue, (EnvironmentError, select.error)):
2605
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):