105
100
mod = os.lstat(filename).st_mode
106
101
if not stat.S_ISLNK(mod):
107
102
mod = mod & 0777555
108
os.chmod(filename, mod)
103
chmod_if_possible(filename, mod)
111
106
def make_writable(filename):
112
107
mod = os.lstat(filename).st_mode
113
108
if not stat.S_ISLNK(mod):
115
os.chmod(filename, mod)
110
chmod_if_possible(filename, mod)
113
def chmod_if_possible(filename, mode):
114
# Set file mode if that can be safely done.
115
# Sometimes even on unix the filesystem won't allow it - see
116
# https://bugs.launchpad.net/bzr/+bug/606537
118
# It is probably faster to just do the chmod, rather than
119
# doing a stat, and then trying to compare
120
os.chmod(filename, mode)
121
except (IOError, OSError),e:
122
# Permission/access denied seems to commonly happen on smbfs; there's
123
# probably no point warning about it.
124
# <https://bugs.launchpad.net/bzr/+bug/606537>
125
if getattr(e, 'errno') in (errno.EPERM, errno.EACCES):
126
trace.mutter("ignore error on chmod of %r: %r" % (
118
132
def minimum_path_selection(paths):
282
299
# copy posixpath.abspath, but use os.getcwdu instead
283
300
if not posixpath.isabs(path):
284
301
path = posixpath.join(getcwd(), path)
285
return posixpath.normpath(path)
302
return _posix_normpath(path)
288
305
def _posix_realpath(path):
289
306
return posixpath.realpath(path.encode(_fs_enc)).decode(_fs_enc)
309
def _posix_normpath(path):
310
path = posixpath.normpath(path)
311
# Bug 861008: posixpath.normpath() returns a path normalized according to
312
# the POSIX standard, which stipulates (for compatibility reasons) that two
313
# leading slashes must not be simplified to one, and only if there are 3 or
314
# more should they be simplified as one. So we treat the leading 2 slashes
315
# as a special case here by simply removing the first slash, as we consider
316
# that breaking POSIX compatibility for this obscure feature is acceptable.
317
# This is not a paranoid precaution, as we notably get paths like this when
318
# the repo is hosted at the root of the filesystem, i.e. in "/".
319
if path.startswith('//'):
292
324
def _win32_fixdrive(path):
293
325
"""Force drive letters to be consistent.
1973
2026
return get_terminal_encoding()
2029
_message_encoding = None
2032
def get_message_encoding():
2033
"""Return the encoding used for messages
2035
While the message encoding is a general setting it should usually only be
2036
needed for decoding system error strings such as from OSError instances.
2038
global _message_encoding
2039
if _message_encoding is None:
2040
if os.name == "posix":
2042
# This is a process-global setting that can change, but should in
2043
# general just get set once at process startup then be constant.
2044
_message_encoding = locale.getlocale(locale.LC_MESSAGES)[1]
2046
# On windows want the result of GetACP() which this boils down to.
2047
_message_encoding = get_user_encoding()
2048
return _message_encoding or "ascii"
1976
2051
def get_host_name():
1977
2052
"""Return the current unicode host name.
2153
2236
return file_kind_from_stat_mode(mode)
2154
2237
file_kind_from_stat_mode = file_kind_from_stat_mode_thunk
2157
def file_kind(f, _lstat=os.lstat):
2239
def file_stat(f, _lstat=os.lstat):
2159
return file_kind_from_stat_mode(_lstat(f).st_mode)
2160
2243
except OSError, e:
2161
2244
if getattr(e, 'errno', None) in (errno.ENOENT, errno.ENOTDIR):
2162
2245
raise errors.NoSuchFile(f)
2248
def file_kind(f, _lstat=os.lstat):
2249
stat_value = file_stat(f, _lstat)
2250
return file_kind_from_stat_mode(stat_value.st_mode)
2166
2252
def until_no_eintr(f, *a, **kw):
2167
2253
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2227
2313
termios.tcsetattr(fd, termios.TCSADRAIN, settings)
2231
if sys.platform == 'linux2':
2316
if sys.platform.startswith('linux'):
2232
2317
def _local_concurrency():
2234
prefix = 'processor'
2235
for line in file('/proc/cpuinfo', 'rb'):
2236
if line.startswith(prefix):
2237
concurrency = int(line[line.find(':')+1:]) + 1
2319
return os.sysconf('SC_NPROCESSORS_ONLN')
2320
except (ValueError, OSError, AttributeError):
2239
2322
elif sys.platform == 'darwin':
2240
2323
def _local_concurrency():
2241
2324
return subprocess.Popen(['sysctl', '-n', 'hw.availcpu'],
2242
2325
stdout=subprocess.PIPE).communicate()[0]
2243
elif sys.platform[0:7] == 'freebsd':
2326
elif "bsd" in sys.platform:
2244
2327
def _local_concurrency():
2245
2328
return subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
2246
2329
stdout=subprocess.PIPE).communicate()[0]
2353
2443
except UnicodeDecodeError:
2354
2444
raise errors.BzrError("Can't decode username as %s." % \
2446
except ImportError, e:
2447
if sys.platform != 'win32':
2449
if str(e) != 'No module named pwd':
2451
# https://bugs.launchpad.net/bzr/+bug/660174
2452
# getpass.getuser() is unable to return username on Windows
2453
# if there is no USERNAME environment variable set.
2454
# That could be true if bzr is running as a service,
2455
# e.g. running `bzr serve` as a service on Windows.
2456
# We should not fail with traceback in this case.
2457
username = u'UNKNOWN'
2356
2458
return username
2461
def available_backup_name(base, exists):
2462
"""Find a non-existing backup file name.
2464
This will *not* create anything, this only return a 'free' entry. This
2465
should be used for checking names in a directory below a locked
2466
tree/branch/repo to avoid race conditions. This is LBYL (Look Before You
2467
Leap) and generally discouraged.
2469
:param base: The base name.
2471
:param exists: A callable returning True if the path parameter exists.
2474
name = "%s.~%d~" % (base, counter)
2477
name = "%s.~%d~" % (base, counter)
2481
def set_fd_cloexec(fd):
2482
"""Set a Unix file descriptor's FD_CLOEXEC flag. Do nothing if platform
2483
support for this is not available.
2487
old = fcntl.fcntl(fd, fcntl.F_GETFD)
2488
fcntl.fcntl(fd, fcntl.F_SETFD, old | fcntl.FD_CLOEXEC)
2489
except (ImportError, AttributeError):
2490
# Either the fcntl module or specific constants are not present
2494
def find_executable_on_path(name):
2495
"""Finds an executable on the PATH.
2497
On Windows, this will try to append each extension in the PATHEXT
2498
environment variable to the name, if it cannot be found with the name
2501
:param name: The base name of the executable.
2502
:return: The path to the executable found or None.
2504
path = os.environ.get('PATH')
2507
path = path.split(os.pathsep)
2508
if sys.platform == 'win32':
2509
exts = os.environ.get('PATHEXT', '').split(os.pathsep)
2510
exts = [ext.lower() for ext in exts]
2511
base, ext = os.path.splitext(name)
2513
if ext.lower() not in exts:
2521
f = os.path.join(d, name) + ext
2522
if os.access(f, os.X_OK):
2527
def _posix_is_local_pid_dead(pid):
2528
"""True if pid doesn't correspond to live process on this machine"""
2530
# Special meaning of unix kill: just check if it's there.
2533
if e.errno == errno.ESRCH:
2534
# On this machine, and really not found: as sure as we can be
2537
elif e.errno == errno.EPERM:
2538
# exists, though not ours
2541
mutter("os.kill(%d, 0) failed: %s" % (pid, e))
2542
# Don't really know.
2545
# Exists and our process: not dead.
2548
if sys.platform == "win32":
2549
is_local_pid_dead = win32utils.is_local_pid_dead
2551
is_local_pid_dead = _posix_is_local_pid_dead
2554
def fdatasync(fileno):
2555
"""Flush file contents to disk if possible.
2557
:param fileno: Integer OS file handle.
2558
:raises TransportNotPossible: If flushing to disk is not possible.
2560
fn = getattr(os, 'fdatasync', getattr(os, 'fsync', None))
2565
def ensure_empty_directory_exists(path, exception_class):
2566
"""Make sure a local directory exists and is empty.
2568
If it does not exist, it is created. If it exists and is not empty, an
2569
instance of exception_class is raised.
2574
if e.errno != errno.EEXIST:
2576
if os.listdir(path) != []:
2577
raise exception_class(path)
2580
def is_environment_error(evalue):
2581
"""True if exception instance is due to a process environment issue
2583
This includes OSError and IOError, but also other errors that come from
2584
the operating system or core libraries but are not subclasses of those.
2586
if isinstance(evalue, (EnvironmentError, select.error)):
2588
if sys.platform == "win32" and win32utils._is_pywintypes_error(evalue):