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)
27
26
from bzrlib.lazy_import import lazy_import
28
27
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
44
from tempfile import mkdtemp
45
from tempfile import (
47
50
from bzrlib import (
54
from bzrlib.i18n import gettext
57
from bzrlib.symbol_versioning import (
62
warn as warn_deprecated,
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
72
from bzrlib import symbol_versioning, _fs_enc
72
from bzrlib import symbol_versioning
75
75
# Cross platform wall-clock time functionality with decent resolution.
106
103
mod = os.lstat(filename).st_mode
107
104
if not stat.S_ISLNK(mod):
108
105
mod = mod & 0777555
109
chmod_if_possible(filename, mod)
106
os.chmod(filename, mod)
112
109
def make_writable(filename):
113
110
mod = os.lstat(filename).st_mode
114
111
if not stat.S_ISLNK(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" % (
113
os.chmod(filename, mod)
138
116
def minimum_path_selection(paths):
290
266
rename_func(tmp_name, new)
291
267
if failure_exc is not None:
293
raise failure_exc[0], failure_exc[1], failure_exc[2]
268
raise failure_exc[0], failure_exc[1], failure_exc[2]
298
271
# In Python 2.4.2 and older, os.path.abspath and os.path.realpath
299
272
# choke on a Unicode string containing a relative path if
300
273
# os.getcwd() returns a non-sys.getdefaultencoding()-encoded
275
_fs_enc = sys.getfilesystemencoding() or 'utf-8'
302
276
def _posix_abspath(path):
303
277
# jam 20060426 rather than encoding to fsencoding
304
278
# copy posixpath.abspath, but use os.getcwdu instead
305
279
if not posixpath.isabs(path):
306
280
path = posixpath.join(getcwd(), path)
307
return _posix_normpath(path)
281
return posixpath.normpath(path)
310
284
def _posix_realpath(path):
311
285
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))
365
288
def _win32_fixdrive(path):
366
289
"""Force drive letters to be consistent.
394
317
# /path => C:/path
395
318
path = unicode(path)
396
319
# check for absolute path
397
drive = ntpath.splitdrive(path)[0]
320
drive = _nt_splitdrive(path)[0]
398
321
if drive == '' and path[:2] not in('//','\\\\'):
399
322
cwd = os.getcwdu()
400
323
# we cannot simply os.path.join cwd and path
401
324
# because os.path.join('C:','/path') produce '/path'
402
325
# and this is incorrect
403
326
if path[:1] in ('/','\\'):
404
cwd = ntpath.splitdrive(cwd)[0]
327
cwd = _nt_splitdrive(cwd)[0]
406
329
path = cwd + '\\' + path
407
return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
330
return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
410
333
def _win32_realpath(path):
411
# Real ntpath.realpath doesn't have a problem with a unicode cwd
412
return _win32_fixdrive(ntpath.realpath(unicode(path)).replace('\\', '/'))
334
# Real _nt_realpath doesn't have a problem with a unicode cwd
335
return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
415
338
def _win32_pathjoin(*args):
416
return ntpath.join(*args).replace('\\', '/')
339
return _nt_join(*args).replace('\\', '/')
419
342
def _win32_normpath(path):
420
return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
343
return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
423
346
def _win32_getcwd():
549
450
input_encoding = getattr(sys.stdin, 'encoding', None)
550
451
if not input_encoding:
551
452
output_encoding = get_user_encoding()
553
mutter('encoding stdout as osutils.get_user_encoding() %r',
453
mutter('encoding stdout as osutils.get_user_encoding() %r',
556
456
output_encoding = input_encoding
558
mutter('encoding stdout as sys.stdin encoding %r',
457
mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
562
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
459
mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
563
460
if output_encoding == 'cp0':
564
461
# invalid encoding (cp0 means 'no codepage' on Windows)
565
462
output_encoding = get_user_encoding()
567
mutter('cp0 is invalid encoding.'
463
mutter('cp0 is invalid encoding.'
568
464
' encoding stdout as osutils.get_user_encoding() %r',
959
855
"""Return size of given open file."""
960
return os.fstat(f.fileno())[stat.ST_SIZE]
963
# Alias os.urandom to support platforms (which?) without /dev/urandom and
964
# override if it doesn't work. Avoid checking on windows where there is
965
# significant initialisation cost that can be avoided for some bzr calls.
967
rand_bytes = os.urandom
969
if rand_bytes.__module__ != "nt":
856
return os.fstat(f.fileno())[ST_SIZE]
859
# Define rand_bytes based on platform.
861
# Python 2.4 and later have os.urandom,
862
# but it doesn't work on some arches
864
rand_bytes = os.urandom
865
except (NotImplementedError, AttributeError):
866
# If python doesn't have os.urandom, or it doesn't work,
867
# then try to first pull random data from /dev/urandom
972
except NotImplementedError:
869
rand_bytes = file('/dev/urandom', 'rb').read
870
# Otherwise, use this hack as a last resort
871
except (IOError, OSError):
973
872
# not well seeded, but better than nothing
974
873
def rand_bytes(n):
1322
1220
# but for now, we haven't optimized...
1323
1221
return [canonical_relpath(base, p) for p in paths]
1326
def decode_filename(filename):
1327
"""Decode the filename using the filesystem encoding
1329
If it is unicode, it is returned.
1330
Otherwise it is decoded from the the filesystem's encoding. If decoding
1331
fails, a errors.BadFilenameEncoding exception is raised.
1333
if type(filename) is unicode:
1336
return filename.decode(_fs_enc)
1337
except UnicodeDecodeError:
1338
raise errors.BadFilenameEncoding(filename, _fs_enc)
1341
1223
def safe_unicode(unicode_or_utf8_string):
1342
1224
"""Coerce unicode_or_utf8_string into unicode.
1462
1344
normalized_filename = _inaccessible_normalized_filename
1465
def set_signal_handler(signum, handler, restart_syscall=True):
1466
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1467
on platforms that support that.
1469
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1470
automatically restart (by calling `signal.siginterrupt(signum,
1471
False)`). May be ignored if the feature is not available on this
1472
platform or Python version.
1476
siginterrupt = signal.siginterrupt
1478
# This python implementation doesn't provide signal support, hence no
1481
except AttributeError:
1482
# siginterrupt doesn't exist on this platform, or for this version
1484
siginterrupt = lambda signum, flag: None
1486
def sig_handler(*args):
1487
# Python resets the siginterrupt flag when a signal is
1488
# received. <http://bugs.python.org/issue8354>
1489
# As a workaround for some cases, set it back the way we want it.
1490
siginterrupt(signum, False)
1491
# Now run the handler function passed to set_signal_handler.
1494
sig_handler = handler
1495
old_handler = signal.signal(signum, sig_handler)
1497
siginterrupt(signum, False)
1501
1347
default_terminal_width = 80
1502
1348
"""The default terminal width for ttys.
1521
1361
- if BZR_COLUMNS is set, returns its value
1522
1362
- if there is no controlling terminal, returns None
1523
- query the OS, if the queried size has changed since the last query,
1525
1363
- if COLUMNS is set, returns its value,
1526
- if the OS has a value (even though it's never changed), return its value.
1528
1365
From there, we need to query the OS to get the size of the controlling
1531
On Unices we query the OS by:
1532
1369
- get termios.TIOCGWINSZ
1533
1370
- if an error occurs or a negative value is obtained, returns None
1535
On Windows we query the OS by:
1536
1374
- win32utils.get_console_size() decides,
1537
1375
- returns None on error (provided default value)
1539
# Note to implementors: if changing the rules for determining the width,
1540
# make sure you've considered the behaviour in these cases:
1541
# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
1542
# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
1544
# - (add more interesting cases here, if you find any)
1545
# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
1546
# but we don't want to register a signal handler because it is impossible
1547
# to do so without risking EINTR errors in Python <= 2.6.5 (see
1548
# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
1549
# time so we can notice if the reported size has changed, which should have
1552
1378
# If BZR_COLUMNS is set, take it, user is always right
1553
# Except if they specified 0 in which case, impose no limit here
1555
width = int(os.environ['BZR_COLUMNS'])
1380
return int(os.environ['BZR_COLUMNS'])
1556
1381
except (KeyError, ValueError):
1558
if width is not None:
1564
1384
isatty = getattr(sys.stdout, 'isatty', None)
1565
if isatty is None or not isatty():
1385
if isatty is None or not isatty():
1566
1386
# Don't guess, setting BZR_COLUMNS is the recommended way to override.
1570
width, height = os_size = _terminal_size(None, None)
1571
global _first_terminal_size, _terminal_size_state
1572
if _terminal_size_state == 'no_data':
1573
_first_terminal_size = os_size
1574
_terminal_size_state = 'unchanged'
1575
elif (_terminal_size_state == 'unchanged' and
1576
_first_terminal_size != os_size):
1577
_terminal_size_state = 'changed'
1579
# If the OS claims to know how wide the terminal is, and this value has
1580
# ever changed, use that.
1581
if _terminal_size_state == 'changed':
1582
if width is not None and width > 0:
1585
# If COLUMNS is set, use it.
1389
# If COLUMNS is set, take it, the terminal knows better (even inside a
1390
# given terminal, the application can decide to set COLUMNS to a lower
1391
# value (splitted screen) or a bigger value (scroll bars))
1587
1393
return int(os.environ['COLUMNS'])
1588
1394
except (KeyError, ValueError):
1591
# Finally, use an unchanged size from the OS, if we have one.
1592
if _terminal_size_state == 'unchanged':
1593
if width is not None and width > 0:
1397
width, height = _terminal_size(None, None)
1399
# Consider invalid values as meaning no width
1596
# The width could not be determined.
1600
1405
def _win32_terminal_size(width, height):
1948
1769
real_handlers[kind](abspath, relpath)
1951
def copy_ownership_from_path(dst, src=None):
1952
"""Copy usr/grp ownership from src file/dir to dst file/dir.
1954
If src is None, the containing directory is used as source. If chown
1955
fails, the error is ignored and a warning is printed.
1957
chown = getattr(os, 'chown', None)
1962
src = os.path.dirname(dst)
1968
chown(dst, s.st_uid, s.st_gid)
1971
'Unable to copy ownership from "%s" to "%s". '
1972
'You may want to set it manually.', src, dst)
1973
trace.log_exception_quietly()
1976
1772
def path_prefix_key(path):
1977
1773
"""Generate a prefix-order path key for path.
1991
1787
_cached_user_encoding = None
1994
def get_user_encoding(use_cache=DEPRECATED_PARAMETER):
1790
def get_user_encoding(use_cache=True):
1995
1791
"""Find out what the preferred user encoding is.
1997
1793
This is generally the encoding that is used for command line parameters
1998
1794
and file contents. This may be different from the terminal encoding
1999
1795
or the filesystem encoding.
1797
:param use_cache: Enable cache for detected encoding.
1798
(This parameter is turned on by default,
1799
and required only for selftesting)
2001
1801
:return: A string defining the preferred user encoding
2003
1803
global _cached_user_encoding
2004
if deprecated_passed(use_cache):
2005
warn_deprecated("use_cache should only have been used for tests",
2006
DeprecationWarning, stacklevel=2)
2007
if _cached_user_encoding is not None:
1804
if _cached_user_encoding is not None and use_cache:
2008
1805
return _cached_user_encoding
2010
if os.name == 'posix' and getattr(locale, 'CODESET', None) is not None:
2011
# Use the existing locale settings and call nl_langinfo directly
2012
# rather than going through getpreferredencoding. This avoids
2013
# <http://bugs.python.org/issue6202> on OSX Python 2.6 and the
2014
# possibility of the setlocale call throwing an error.
2015
user_encoding = locale.nl_langinfo(locale.CODESET)
1807
if sys.platform == 'darwin':
1808
# python locale.getpreferredencoding() always return
1809
# 'mac-roman' on darwin. That's a lie.
1810
sys.platform = 'posix'
1812
if os.environ.get('LANG', None) is None:
1813
# If LANG is not set, we end up with 'ascii', which is bad
1814
# ('mac-roman' is more than ascii), so we set a default which
1815
# will give us UTF-8 (which appears to work in all cases on
1816
# OSX). Users are still free to override LANG of course, as
1817
# long as it give us something meaningful. This work-around
1818
# *may* not be needed with python 3k and/or OSX 10.5, but will
1819
# work with them too -- vila 20080908
1820
os.environ['LANG'] = 'en_US.UTF-8'
1823
sys.platform = 'darwin'
2017
# GZ 2011-12-19: On windows could call GetACP directly instead.
2018
user_encoding = locale.getpreferredencoding(False)
2021
user_encoding = codecs.lookup(user_encoding).name
2023
if user_encoding not in ("", "cp0"):
1828
user_encoding = locale.getpreferredencoding()
1829
except locale.Error, e:
1830
sys.stderr.write('bzr: warning: %s\n'
1831
' Could not determine what text encoding to use.\n'
1832
' This error usually means your Python interpreter\n'
1833
' doesn\'t support the locale set by $LANG (%s)\n'
1834
" Continuing with ascii encoding.\n"
1835
% (e, os.environ.get('LANG')))
1836
user_encoding = 'ascii'
1838
# Windows returns 'cp0' to indicate there is no code page. So we'll just
1839
# treat that as ASCII, and not support printing unicode characters to the
1842
# For python scripts run under vim, we get '', so also treat that as ASCII
1843
if user_encoding in (None, 'cp0', ''):
1844
user_encoding = 'ascii'
1848
codecs.lookup(user_encoding)
2024
1850
sys.stderr.write('bzr: warning:'
2025
1851
' unknown encoding %s.'
2026
1852
' Continuing with ascii encoding.\n'
2027
1853
% user_encoding
2029
user_encoding = 'ascii'
2031
# Get 'ascii' when setlocale has not been called or LANG=C or unset.
2032
if user_encoding == 'ascii':
2033
if sys.platform == 'darwin':
2034
# OSX is special-cased in Python to have a UTF-8 filesystem
2035
# encoding and previously had LANG set here if not present.
2036
user_encoding = 'utf-8'
2037
# GZ 2011-12-19: Maybe UTF-8 should be the default in this case
2038
# for some other posix platforms as well.
2040
_cached_user_encoding = user_encoding
1855
user_encoding = 'ascii'
1858
_cached_user_encoding = user_encoding
2041
1860
return user_encoding
2044
def get_diff_header_encoding():
2045
return get_terminal_encoding()
2048
1863
def get_host_name():
2049
1864
"""Return the current unicode host name.
2052
1867
behaves inconsistently on different platforms.
2054
1869
if sys.platform == "win32":
2055
1871
return win32utils.get_host_name()
2058
1874
return socket.gethostname().decode(get_user_encoding())
2061
# We must not read/write any more than 64k at a time from/to a socket so we
2062
# don't risk "no buffer space available" errors on some platforms. Windows in
2063
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
2065
MAX_SOCKET_CHUNK = 64 * 1024
2067
_end_of_stream_errors = [errno.ECONNRESET]
2068
for _eno in ['WSAECONNRESET', 'WSAECONNABORTED']:
2069
_eno = getattr(errno, _eno, None)
2070
if _eno is not None:
2071
_end_of_stream_errors.append(_eno)
2075
def read_bytes_from_socket(sock, report_activity=None,
2076
max_read_size=MAX_SOCKET_CHUNK):
2077
"""Read up to max_read_size of bytes from sock and notify of progress.
2079
Translates "Connection reset by peer" into file-like EOF (return an
2080
empty string rather than raise an error), and repeats the recv if
2081
interrupted by a signal.
2085
bytes = sock.recv(max_read_size)
2086
except socket.error, e:
2088
if eno in _end_of_stream_errors:
2089
# The connection was closed by the other side. Callers expect
2090
# an empty string to signal end-of-stream.
2092
elif eno == errno.EINTR:
2093
# Retry the interrupted recv.
2097
if report_activity is not None:
2098
report_activity(len(bytes), 'read')
2102
def recv_all(socket, count):
1877
def recv_all(socket, bytes):
2103
1878
"""Receive an exact number of bytes.
2105
1880
Regular Socket.recv() may return less than the requested number of bytes,
2106
depending on what's in the OS buffer. MSG_WAITALL is not available
1881
dependning on what's in the OS buffer. MSG_WAITALL is not available
2107
1882
on all platforms, but this should work everywhere. This will return
2108
1883
less than the requested amount if the remote end closes.
2110
1885
This isn't optimized and is intended mostly for use in testing.
2113
while len(b) < count:
2114
new = read_bytes_from_socket(socket, None, count - len(b))
1888
while len(b) < bytes:
1889
new = until_no_eintr(socket.recv, bytes - len(b))
2121
def send_all(sock, bytes, report_activity=None):
1896
def send_all(socket, bytes, report_activity=None):
2122
1897
"""Send all bytes on a socket.
2124
Breaks large blocks in smaller chunks to avoid buffering limitations on
2125
some platforms, and catches EINTR which may be thrown if the send is
2126
interrupted by a signal.
2128
This is preferred to socket.sendall(), because it avoids portability bugs
2129
and provides activity reporting.
1899
Regular socket.sendall() can give socket error 10053 on Windows. This
1900
implementation sends no more than 64k at a time, which avoids this problem.
2131
1902
:param report_activity: Call this as bytes are read, see
2132
1903
Transport._report_activity
2135
byte_count = len(bytes)
2136
while sent_total < byte_count:
2138
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2139
except socket.error, e:
2140
if e.args[0] != errno.EINTR:
2144
report_activity(sent, 'write')
2147
def connect_socket(address):
2148
# Slight variation of the socket.create_connection() function (provided by
2149
# python-2.6) that can fail if getaddrinfo returns an empty list. We also
2150
# provide it for previous python versions. Also, we don't use the timeout
2151
# parameter (provided by the python implementation) so we don't implement
2153
err = socket.error('getaddrinfo returns an empty list')
2154
host, port = address
2155
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
2156
af, socktype, proto, canonname, sa = res
2159
sock = socket.socket(af, socktype, proto)
2163
except socket.error, err:
2164
# 'err' is now the most recent error
2165
if sock is not None:
1906
for pos in xrange(0, len(bytes), chunk_size):
1907
block = bytes[pos:pos+chunk_size]
1908
if report_activity is not None:
1909
report_activity(len(block), 'write')
1910
until_no_eintr(socket.sendall, block)
2170
1913
def dereference_path(path):
2232
1973
return file_kind_from_stat_mode(mode)
2233
1974
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2235
def file_stat(f, _lstat=os.lstat):
1977
def file_kind(f, _lstat=os.lstat):
1979
return file_kind_from_stat_mode(_lstat(f).st_mode)
2239
1980
except OSError, e:
2240
1981
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2241
1982
raise errors.NoSuchFile(f)
2244
def file_kind(f, _lstat=os.lstat):
2245
stat_value = file_stat(f, _lstat)
2246
return file_kind_from_stat_mode(stat_value.st_mode)
2248
1986
def until_no_eintr(f, *a, **kw):
2249
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2251
WARNING: you must be certain that it is safe to retry the call repeatedly
2252
if EINTR does occur. This is typically only true for low-level operations
2253
like os.read. If in any doubt, don't use this.
2255
Keep in mind that this is not a complete solution to EINTR. There is
2256
probably code in the Python standard library and other dependencies that
2257
may encounter EINTR if a signal arrives (and there is signal handler for
2258
that signal). So this function can reduce the impact for IO that bzrlib
2259
directly controls, but it is not a complete solution.
1987
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2261
1988
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2309
2034
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2312
if sys.platform.startswith('linux'):
2038
if sys.platform == 'linux2':
2313
2039
def _local_concurrency():
2315
return os.sysconf('SC_NPROCESSORS_ONLN')
2316
except (ValueError, OSError, AttributeError):
2041
prefix = 'processor'
2042
for line in file('/proc/cpuinfo', 'rb'):
2043
if line.startswith(prefix):
2044
concurrency = int(line[line.find(':')+1:]) + 1
2318
2046
elif sys.platform == 'darwin':
2319
2047
def _local_concurrency():
2320
2048
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2321
2049
stdout=subprocess.PIPE).communicate()[0]
2322
elif "bsd" in sys.platform:
2050
elif sys.platform[0:7] == 'freebsd':
2323
2051
def _local_concurrency():
2324
2052
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2325
2053
stdout=subprocess.PIPE).communicate()[0]
2386
2107
data, _ = self.encode(object, self.errors)
2387
2108
self.stream.write(data)
2389
if sys.platform == 'win32':
2390
def open_file(filename, mode='r', bufsize=-1):
2391
"""This function is used to override the ``open`` builtin.
2393
But it uses O_NOINHERIT flag so the file handle is not inherited by
2394
child processes. Deleting or renaming a closed file opened with this
2395
function is not blocking child processes.
2397
writing = 'w' in mode
2398
appending = 'a' in mode
2399
updating = '+' in mode
2400
binary = 'b' in mode
2403
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2404
# for flags for each modes.
2414
flags |= os.O_WRONLY
2415
flags |= os.O_CREAT | os.O_TRUNC
2420
flags |= os.O_WRONLY
2421
flags |= os.O_CREAT | os.O_APPEND
2426
flags |= os.O_RDONLY
2428
return os.fdopen(os.open(filename, flags), mode, bufsize)
2433
def available_backup_name(base, exists):
2434
"""Find a non-existing backup file name.
2436
This will *not* create anything, this only return a 'free' entry. This
2437
should be used for checking names in a directory below a locked
2438
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2439
Leap) and generally discouraged.
2441
:param base: The base name.
2443
:param exists: A callable returning True if the path parameter exists.
2446
name = "%s.~%d~" % (base, counter)
2449
name = "%s.~%d~" % (base, counter)
2453
def set_fd_cloexec(fd):
2454
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2455
support for this is not available.
2459
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2460
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2461
except (ImportError, AttributeError):
2462
# Either the fcntl module or specific constants are not present
2466
def find_executable_on_path(name):
2467
"""Finds an executable on the PATH.
2469
On Windows, this will try to append each extension in the PATHEXT
2470
environment variable to the name, if it cannot be found with the name
2473
:param name: The base name of the executable.
2474
:return: The path to the executable found or None.
2476
path = os.environ.get('PATH')
2479
path = path.split(os.pathsep)
2480
if sys.platform == 'win32':
2481
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2482
exts = [ext.lower() for ext in exts]
2483
base, ext = os.path.splitext(name)
2485
if ext.lower() not in exts:
2493
f = os.path.join(d, name) + ext
2494
if os.access(f, os.X_OK):
2499
def _posix_is_local_pid_dead(pid):
2500
"""True if pid doesn't correspond to live process on this machine"""
2502
# Special meaning of unix kill: just check if it's there.
2505
if e.errno == errno.ESRCH:
2506
# On this machine, and really not found: as sure as we can be
2509
elif e.errno == errno.EPERM:
2510
# exists, though not ours
2513
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2514
# Don't really know.
2517
# Exists and our process: not dead.
2520
if sys.platform == "win32":
2521
is_local_pid_dead = win32utils.is_local_pid_dead
2523
is_local_pid_dead = _posix_is_local_pid_dead
2526
def fdatasync(fileno):
2527
"""Flush file contents to disk if possible.
2529
:param fileno: Integer OS file handle.
2530
:raises TransportNotPossible: If flushing to disk is not possible.
2532
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2537
def ensure_empty_directory_exists(path, exception_class):
2538
"""Make sure a local directory exists and is empty.
2540
If it does not exist, it is created. If it exists and is not empty, an
2541
instance of exception_class is raised.
2546
if e.errno != errno.EEXIST:
2548
if os.listdir(path) != []:
2549
raise exception_class(path)
2552
def is_environment_error(evalue):
2553
"""True if exception instance is due to a process environment issue
2555
This includes OSError and IOError, but also other errors that come from
2556
the operating system or core libraries but are not subclasses of those.
2558
if isinstance(evalue, (EnvironmentError, select.error)):
2560
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):
added
removed
bzrlib/osutils.py
