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
27
from bzrlib.lazy_import import lazy_import
26
28
lazy_import(globals(), """
27
29
from datetime import datetime
30
31
from ntpath import (abspath as _nt_abspath,
32
33
normpath as _nt_normpath,
361
356
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
359
def _win32_rename(old, new):
373
360
"""We expect to be able to atomically replace 'new' with old.
1384
1358
False)`). May be ignored if the feature is not available on this
1385
1359
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
1361
old_handler = signal.signal(signum, handler)
1398
1362
if restart_syscall:
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.
1364
siginterrupt = signal.siginterrupt
1365
except AttributeError: # siginterrupt doesn't exist on this platform, or for this version of
1403
1369
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)
1411
1370
return old_handler
1509
1468
_registered_sigwinch = False
1510
1470
def watch_sigwinch():
1511
"""Register for SIGWINCH, once and only once.
1513
Do nothing if the signal module is not available.
1471
"""Register for SIGWINCH, once and only once."""
1515
1472
global _registered_sigwinch
1516
1473
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
1474
if sys.platform == 'win32':
1475
# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from
1476
# ReadConsoleInput but I've no idea how to plug that in
1477
# the current design -- vila 20091216
1480
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1524
1481
_registered_sigwinch = True
1847
1804
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
1807
def path_prefix_key(path):
1873
1808
"""Generate a prefix-order path key for path.
1974
1909
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):
1912
def recv_all(socket, bytes):
2011
1913
"""Receive an exact number of bytes.
2013
1915
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
1916
dependning on what's in the OS buffer. MSG_WAITALL is not available
2015
1917
on all platforms, but this should work everywhere. This will return
2016
1918
less than the requested amount if the remote end closes.
2018
1920
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))
1923
while len(b) < bytes:
1924
new = until_no_eintr(socket.recv, bytes - len(b))
2029
def send_all(sock, bytes, report_activity=None):
1931
def send_all(socket, bytes, report_activity=None):
2030
1932
"""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.
1934
Regular socket.sendall() can give socket error 10053 on Windows. This
1935
implementation sends no more than 64k at a time, which avoids this problem.
2039
1937
:param report_activity: Call this as bytes are read, see
2040
1938
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')
1941
for pos in xrange(0, len(bytes), chunk_size):
1942
block = bytes[pos:pos+chunk_size]
1943
if report_activity is not None:
1944
report_activity(len(block), 'write')
1945
until_no_eintr(socket.sendall, block)
2055
1948
def dereference_path(path):
2128
2021
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.
2022
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2141
2023
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
added
removed
bzrlib/osutils.py
