20
from stat import S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE
20
from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
21
S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
25
26
from bzrlib.lazy_import import lazy_import
26
27
lazy_import(globals(), """
27
29
from datetime import datetime
30
31
from ntpath import (abspath as _nt_abspath,
32
33
normpath as _nt_normpath,
90
85
# be opened in binary mode, rather than text mode.
91
86
# On other platforms, O_BINARY doesn't exist, because
92
87
# they always open in binary mode, so it is okay to
93
# OR with 0 on those platforms.
94
# O_NOINHERIT and O_TEXT exists only on win32 too.
88
# OR with 0 on those platforms
95
89
O_BINARY = getattr(os, 'O_BINARY', 0)
96
O_TEXT = getattr(os, 'O_TEXT', 0)
97
O_NOINHERIT = getattr(os, 'O_NOINHERIT', 0)
100
92
def get_unicode_argv():
212
202
:param old: The old path, to rename from
213
203
:param new: The new path, to rename to
214
204
:param rename_func: The potentially non-atomic rename function
215
:param unlink_func: A way to delete the target file if the full rename
205
:param unlink_func: A way to delete the target file if the full rename succeeds
218
208
# sftp rename doesn't allow overwriting, so play tricks:
219
209
base = os.path.basename(new)
220
210
dirname = os.path.dirname(new)
221
# callers use different encodings for the paths so the following MUST
222
# respect that. We rely on python upcasting to unicode if new is unicode
223
# and keeping a str if not.
224
tmp_name = 'tmp.%s.%.9f.%d.%s' % (base, time.time(),
225
os.getpid(), rand_chars(10))
211
tmp_name = u'tmp.%s.%.9f.%d.%s' % (base, time.time(), os.getpid(), rand_chars(10))
226
212
tmp_name = pathjoin(dirname, tmp_name)
228
214
# Rename the file out of the way, but keep track if it didn't exist
361
347
return _win32_fixdrive(tempfile.mkdtemp(*args, **kwargs).replace('\\', '/'))
364
def _add_rename_error_details(e, old, new):
365
new_e = OSError(e.errno, "failed to rename %s to %s: %s"
366
% (old, new, e.strerror))
368
new_e.to_filename = new
372
350
def _win32_rename(old, new):
373
351
"""We expect to be able to atomically replace 'new' with old.
1375
1340
normalized_filename = _inaccessible_normalized_filename
1378
def set_signal_handler(signum, handler, restart_syscall=True):
1379
"""A wrapper for signal.signal that also calls siginterrupt(signum, False)
1380
on platforms that support that.
1382
:param restart_syscall: if set, allow syscalls interrupted by a signal to
1383
automatically restart (by calling `signal.siginterrupt(signum,
1384
False)`). May be ignored if the feature is not available on this
1385
platform or Python version.
1389
siginterrupt = signal.siginterrupt
1391
# This python implementation doesn't provide signal support, hence no
1394
except AttributeError:
1395
# siginterrupt doesn't exist on this platform, or for this version
1397
siginterrupt = lambda signum, flag: None
1399
def sig_handler(*args):
1400
# Python resets the siginterrupt flag when a signal is
1401
# received. <http://bugs.python.org/issue8354>
1402
# As a workaround for some cases, set it back the way we want it.
1403
siginterrupt(signum, False)
1404
# Now run the handler function passed to set_signal_handler.
1407
sig_handler = handler
1408
old_handler = signal.signal(signum, sig_handler)
1410
siginterrupt(signum, False)
1414
1343
default_terminal_width = 80
1415
1344
"""The default terminal width for ttys.
1505
1434
if width is not None:
1506
1435
os.environ['COLUMNS'] = str(width)
1509
_registered_sigwinch = False
1510
def watch_sigwinch():
1511
"""Register for SIGWINCH, once and only once.
1513
Do nothing if the signal module is not available.
1515
global _registered_sigwinch
1516
if not _registered_sigwinch:
1519
if getattr(signal, "SIGWINCH", None) is not None:
1520
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1522
# python doesn't provide signal support, nothing we can do about it
1524
_registered_sigwinch = True
1437
if sys.platform == 'win32':
1438
# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from ReadConsoleInput but
1439
# I've no idea how to plug that in the current design -- vila 20091216
1442
signal.signal(signal.SIGWINCH, _terminal_size_changed)
1527
1445
def supports_executable():
1847
1765
real_handlers[kind](abspath, relpath)
1850
def copy_ownership_from_path(dst, src=None):
1851
"""Copy usr/grp ownership from src file/dir to dst file/dir.
1853
If src is None, the containing directory is used as source. If chown
1854
fails, the error is ignored and a warning is printed.
1856
chown = getattr(os, 'chown', None)
1861
src = os.path.dirname(dst)
1867
chown(dst, s.st_uid, s.st_gid)
1869
trace.warning("Unable to copy ownership from '%s' to '%s': IOError: %s." % (src, dst, e))
1872
1768
def path_prefix_key(path):
1873
1769
"""Generate a prefix-order path key for path.
1974
1870
return socket.gethostname().decode(get_user_encoding())
1977
# We must not read/write any more than 64k at a time from/to a socket so we
1978
# don't risk "no buffer space available" errors on some platforms. Windows in
1979
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
1981
MAX_SOCKET_CHUNK = 64 * 1024
1983
def read_bytes_from_socket(sock, report_activity=None,
1984
max_read_size=MAX_SOCKET_CHUNK):
1985
"""Read up to max_read_size of bytes from sock and notify of progress.
1987
Translates "Connection reset by peer" into file-like EOF (return an
1988
empty string rather than raise an error), and repeats the recv if
1989
interrupted by a signal.
1993
bytes = sock.recv(max_read_size)
1994
except socket.error, e:
1996
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
1997
# The connection was closed by the other side. Callers expect
1998
# an empty string to signal end-of-stream.
2000
elif eno == errno.EINTR:
2001
# Retry the interrupted recv.
2005
if report_activity is not None:
2006
report_activity(len(bytes), 'read')
2010
def recv_all(socket, count):
1873
def recv_all(socket, bytes):
2011
1874
"""Receive an exact number of bytes.
2013
1876
Regular Socket.recv() may return less than the requested number of bytes,
2014
depending on what's in the OS buffer. MSG_WAITALL is not available
1877
dependning on what's in the OS buffer. MSG_WAITALL is not available
2015
1878
on all platforms, but this should work everywhere. This will return
2016
1879
less than the requested amount if the remote end closes.
2018
1881
This isn't optimized and is intended mostly for use in testing.
2021
while len(b) < count:
2022
new = read_bytes_from_socket(socket, None, count - len(b))
1884
while len(b) < bytes:
1885
new = until_no_eintr(socket.recv, bytes - len(b))
2029
def send_all(sock, bytes, report_activity=None):
1892
def send_all(socket, bytes, report_activity=None):
2030
1893
"""Send all bytes on a socket.
2032
Breaks large blocks in smaller chunks to avoid buffering limitations on
2033
some platforms, and catches EINTR which may be thrown if the send is
2034
interrupted by a signal.
2036
This is preferred to socket.sendall(), because it avoids portability bugs
2037
and provides activity reporting.
1895
Regular socket.sendall() can give socket error 10053 on Windows. This
1896
implementation sends no more than 64k at a time, which avoids this problem.
2039
1898
:param report_activity: Call this as bytes are read, see
2040
1899
Transport._report_activity
2043
byte_count = len(bytes)
2044
while sent_total < byte_count:
2046
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2047
except socket.error, e:
2048
if e.args[0] != errno.EINTR:
2052
report_activity(sent, 'write')
1902
for pos in xrange(0, len(bytes), chunk_size):
1903
block = bytes[pos:pos+chunk_size]
1904
if report_activity is not None:
1905
report_activity(len(block), 'write')
1906
until_no_eintr(socket.sendall, block)
2055
1909
def dereference_path(path):
2128
1982
def until_no_eintr(f, *a, **kw):
2129
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2131
WARNING: you must be certain that it is safe to retry the call repeatedly
2132
if EINTR does occur. This is typically only true for low-level operations
2133
like os.read. If in any doubt, don't use this.
2135
Keep in mind that this is not a complete solution to EINTR. There is
2136
probably code in the Python standard library and other dependencies that
2137
may encounter EINTR if a signal arrives (and there is signal handler for
2138
that signal). So this function can reduce the impact for IO that bzrlib
2139
directly controls, but it is not a complete solution.
1983
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2141
1984
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
2246
2088
_cached_concurrency = concurrency
2247
2089
return concurrency
2250
class UnicodeOrBytesToBytesWriter(codecs.StreamWriter):
2251
"""A stream writer that doesn't decode str arguments."""
2253
def __init__(self, encode, stream, errors='strict'):
2254
codecs.StreamWriter.__init__(self, stream, errors)
2255
self.encode = encode
2257
def write(self, object):
2258
if type(object) is str:
2259
self.stream.write(object)
2261
data, _ = self.encode(object, self.errors)
2262
self.stream.write(data)
2264
if sys.platform == 'win32':
2265
def open_file(filename, mode='r', bufsize=-1):
2266
"""This function is used to override the ``open`` builtin.
2268
But it uses O_NOINHERIT flag so the file handle is not inherited by
2269
child processes. Deleting or renaming a closed file opened with this
2270
function is not blocking child processes.
2272
writing = 'w' in mode
2273
appending = 'a' in mode
2274
updating = '+' in mode
2275
binary = 'b' in mode
2278
# see http://msdn.microsoft.com/en-us/library/yeby3zcb%28VS.71%29.aspx
2279
# for flags for each modes.
2289
flags |= os.O_WRONLY
2290
flags |= os.O_CREAT | os.O_TRUNC
2295
flags |= os.O_WRONLY
2296
flags |= os.O_CREAT | os.O_APPEND
2301
flags |= os.O_RDONLY
2303
return os.fdopen(os.open(filename, flags), mode, bufsize)
2308
def getuser_unicode():
2309
"""Return the username as unicode.
2312
user_encoding = get_user_encoding()
2313
username = getpass.getuser().decode(user_encoding)
2314
except UnicodeDecodeError:
2315
raise errors.BzrError("Can't decode username as %s." % \
added
removed
bzrlib/osutils.py
