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(), """
360
358
return _win32_fixdrive(tempfile.mkdtemp(*args, **kwargs).replace('\\', '/'))
363
def _add_rename_error_details(e, old, new):
364
new_e = OSError(e.errno, "failed to rename %s to %s: %s"
365
% (old, new, e.strerror))
367
new_e.to_filename = new
371
361
def _win32_rename(old, new):
372
362
"""We expect to be able to atomically replace 'new' with old.
1383
1360
False)`). May be ignored if the feature is not available on this
1384
1361
platform or Python version.
1388
siginterrupt = signal.siginterrupt
1390
# This python implementation doesn't provide signal support, hence no
1393
except AttributeError:
1394
# siginterrupt doesn't exist on this platform, or for this version
1396
siginterrupt = lambda signum, flag: None
1363
old_handler = signal.signal(signum, handler)
1397
1364
if restart_syscall:
1398
def sig_handler(*args):
1399
# Python resets the siginterrupt flag when a signal is
1400
# received. <http://bugs.python.org/issue8354>
1401
# As a workaround for some cases, set it back the way we want it.
1366
siginterrupt = signal.siginterrupt
1367
except AttributeError: # siginterrupt doesn't exist on this platform, or for this version of
1402
1371
siginterrupt(signum, False)
1403
# Now run the handler function passed to set_signal_handler.
1406
sig_handler = handler
1407
old_handler = signal.signal(signum, sig_handler)
1409
siginterrupt(signum, False)
1410
1372
return old_handler
1508
1470
_registered_sigwinch = False
1509
1472
def watch_sigwinch():
1510
"""Register for SIGWINCH, once and only once.
1512
Do nothing if the signal module is not available.
1473
"""Register for SIGWINCH, once and only once."""
1514
1474
global _registered_sigwinch
1515
1475
if not _registered_sigwinch:
1518
if getattr(signal, "SIGWINCH", None) is not None:
1519
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1521
# python doesn't provide signal support, nothing we can do about it
1476
if sys.platform == 'win32':
1477
# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from
1478
# ReadConsoleInput but I've no idea how to plug that in
1479
# the current design -- vila 20091216
1482
set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
1523
1483
_registered_sigwinch = True
1868
1828
trace.warning("Unable to copy ownership from '%s' to '%s': IOError: %s." % (src, dst, e))
1831
def mkdir_with_ownership(path, ownership_src=None):
1832
"""Create the directory 'path' with specified ownership.
1834
If ownership_src is given, copies (chown) usr/grp ownership
1835
from 'ownership_src' to 'path'. If ownership_src is None, use the
1836
containing dir ownership.
1839
copy_ownership(path, ownership_src)
1842
def open_with_ownership(filename, mode='r', bufsize=-1, ownership_src=None):
1843
"""Open the file 'filename' with the specified ownership.
1845
If ownership_src is specified, copy usr/grp ownership from ownership_src
1846
to filename. If ownership_src is None, copy ownership from containing
1848
Returns the opened file object.
1850
f = open(filename, mode, bufsize)
1851
copy_ownership(filename, ownership_src)
1871
1855
def path_prefix_key(path):
1872
1856
"""Generate a prefix-order path key for path.
1973
1957
return socket.gethostname().decode(get_user_encoding())
1976
# We must not read/write any more than 64k at a time from/to a socket so we
1977
# don't risk "no buffer space available" errors on some platforms. Windows in
1978
# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
1980
MAX_SOCKET_CHUNK = 64 * 1024
1982
def read_bytes_from_socket(sock, report_activity=None,
1983
max_read_size=MAX_SOCKET_CHUNK):
1984
"""Read up to max_read_size of bytes from sock and notify of progress.
1986
Translates "Connection reset by peer" into file-like EOF (return an
1987
empty string rather than raise an error), and repeats the recv if
1988
interrupted by a signal.
1992
bytes = sock.recv(max_read_size)
1993
except socket.error, e:
1995
if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
1996
# The connection was closed by the other side. Callers expect
1997
# an empty string to signal end-of-stream.
1999
elif eno == errno.EINTR:
2000
# Retry the interrupted recv.
2004
if report_activity is not None:
2005
report_activity(len(bytes), 'read')
2009
def recv_all(socket, count):
1960
def recv_all(socket, bytes):
2010
1961
"""Receive an exact number of bytes.
2012
1963
Regular Socket.recv() may return less than the requested number of bytes,
2013
depending on what's in the OS buffer. MSG_WAITALL is not available
1964
dependning on what's in the OS buffer. MSG_WAITALL is not available
2014
1965
on all platforms, but this should work everywhere. This will return
2015
1966
less than the requested amount if the remote end closes.
2017
1968
This isn't optimized and is intended mostly for use in testing.
2020
while len(b) < count:
2021
new = read_bytes_from_socket(socket, None, count - len(b))
1971
while len(b) < bytes:
1972
new = until_no_eintr(socket.recv, bytes - len(b))
2028
def send_all(sock, bytes, report_activity=None):
1979
def send_all(socket, bytes, report_activity=None):
2029
1980
"""Send all bytes on a socket.
2031
Breaks large blocks in smaller chunks to avoid buffering limitations on
2032
some platforms, and catches EINTR which may be thrown if the send is
2033
interrupted by a signal.
2035
This is preferred to socket.sendall(), because it avoids portability bugs
2036
and provides activity reporting.
1982
Regular socket.sendall() can give socket error 10053 on Windows. This
1983
implementation sends no more than 64k at a time, which avoids this problem.
2038
1985
:param report_activity: Call this as bytes are read, see
2039
1986
Transport._report_activity
2042
byte_count = len(bytes)
2043
while sent_total < byte_count:
2045
sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
2046
except socket.error, e:
2047
if e.args[0] != errno.EINTR:
2051
report_activity(sent, 'write')
1989
for pos in xrange(0, len(bytes), chunk_size):
1990
block = bytes[pos:pos+chunk_size]
1991
if report_activity is not None:
1992
report_activity(len(block), 'write')
1993
until_no_eintr(socket.sendall, block)
2054
1996
def dereference_path(path):
2127
2069
def until_no_eintr(f, *a, **kw):
2128
"""Run f(*a, **kw), retrying if an EINTR error occurs.
2130
WARNING: you must be certain that it is safe to retry the call repeatedly
2131
if EINTR does occur. This is typically only true for low-level operations
2132
like os.read. If in any doubt, don't use this.
2134
Keep in mind that this is not a complete solution to EINTR. There is
2135
probably code in the Python standard library and other dependencies that
2136
may encounter EINTR if a signal arrives (and there is signal handler for
2137
that signal). So this function can reduce the impact for IO that bzrlib
2138
directly controls, but it is not a complete solution.
2070
"""Run f(*a, **kw), retrying if an EINTR error occurs."""
2140
2071
# Borrowed from Twisted's twisted.python.util.untilConcludes function.
added
removed
bzrlib/osutils.py
