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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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from stat import (S_ISREG, S_ISDIR, S_ISLNK, ST_MODE, ST_SIZE,
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S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK)
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from datetime import datetime
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from ntpath import (abspath as _nt_abspath,
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normpath as _nt_normpath,
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realpath as _nt_realpath,
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splitdrive as _nt_splitdrive,
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# We need to import both shutil and rmtree as we export the later on posix
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# and need the former on windows
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from shutil import rmtree
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# We need to import both tempfile and mkdtemp as we export the later on posix
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# and need the former on windows
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from tempfile import mkdtemp
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from tempfile import (
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from bzrlib import (
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from bzrlib.symbol_versioning import (
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# sha and md5 modules are deprecated in python2.6 but hashlib is available as
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if sys.version_info < (2, 5):
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running python.exe under cmd.exe return capital C:\\
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running win32 python inside a cygwin shell returns lowercase c:\\
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drive, path = ntpath.splitdrive(path)
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drive, path = _nt_splitdrive(path)
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return drive.upper() + path
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def _win32_abspath(path):
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# Real ntpath.abspath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(ntpath.abspath(unicode(path)).replace('\\', '/'))
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# Real _nt_abspath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(_nt_abspath(unicode(path)).replace('\\', '/'))
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def _win98_abspath(path):
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# /path => C:/path
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path = unicode(path)
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# check for absolute path
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drive = ntpath.splitdrive(path)[0]
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drive = _nt_splitdrive(path)[0]
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if drive == '' and path[:2] not in('//','\\\\'):
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cwd = os.getcwdu()
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# we cannot simply os.path.join cwd and path
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# because os.path.join('C:','/path') produce '/path'
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# and this is incorrect
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if path[:1] in ('/','\\'):
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cwd = ntpath.splitdrive(cwd)[0]
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cwd = _nt_splitdrive(cwd)[0]
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path = cwd + '\\' + path
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return _win32_fixdrive(ntpath.normpath(path).replace('\\', '/'))
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return _win32_fixdrive(_nt_normpath(path).replace('\\', '/'))
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def _win32_realpath(path):
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# Real ntpath.realpath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(ntpath.realpath(unicode(path)).replace('\\', '/'))
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# Real _nt_realpath doesn't have a problem with a unicode cwd
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return _win32_fixdrive(_nt_realpath(unicode(path)).replace('\\', '/'))
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def _win32_pathjoin(*args):
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return ntpath.join(*args).replace('\\', '/')
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return _nt_join(*args).replace('\\', '/')
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def _win32_normpath(path):
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return _win32_fixdrive(ntpath.normpath(unicode(path)).replace('\\', '/'))
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return _win32_fixdrive(_nt_normpath(unicode(path)).replace('\\', '/'))
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def _win32_getcwd():
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input_encoding = getattr(sys.stdin, 'encoding', None)
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if not input_encoding:
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output_encoding = get_user_encoding()
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mutter('encoding stdout as osutils.get_user_encoding() %r',
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mutter('encoding stdout as osutils.get_user_encoding() %r',
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output_encoding = input_encoding
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mutter('encoding stdout as sys.stdin encoding %r',
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mutter('encoding stdout as sys.stdin encoding %r', output_encoding)
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mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
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mutter('encoding stdout as sys.stdout encoding %r', output_encoding)
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if output_encoding == 'cp0':
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# invalid encoding (cp0 means 'no codepage' on Windows)
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output_encoding = get_user_encoding()
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mutter('cp0 is invalid encoding.'
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mutter('cp0 is invalid encoding.'
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' encoding stdout as osutils.get_user_encoding() %r',
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# but for now, we haven't optimized...
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return [canonical_relpath(base, p) for p in paths]
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def decode_filename(filename):
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"""Decode the filename using the filesystem encoding
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If it is unicode, it is returned.
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Otherwise it is decoded from the the filesystem's encoding. If decoding
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fails, a errors.BadFilenameEncoding exception is raised.
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if type(filename) is unicode:
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return filename.decode(_fs_enc)
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except UnicodeDecodeError:
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raise errors.BadFilenameEncoding(filename, _fs_enc)
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def safe_unicode(unicode_or_utf8_string):
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"""Coerce unicode_or_utf8_string into unicode.
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False)`). May be ignored if the feature is not available on this
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platform or Python version.
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siginterrupt = signal.siginterrupt
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# This python implementation doesn't provide signal support, hence no
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except AttributeError:
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# siginterrupt doesn't exist on this platform, or for this version
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siginterrupt = lambda signum, flag: None
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old_handler = signal.signal(signum, handler)
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if restart_syscall:
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def sig_handler(*args):
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# Python resets the siginterrupt flag when a signal is
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# received. <http://bugs.python.org/issue8354>
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# As a workaround for some cases, set it back the way we want it.
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siginterrupt = signal.siginterrupt
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except AttributeError: # siginterrupt doesn't exist on this platform, or for this version of
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siginterrupt(signum, False)
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# Now run the handler function passed to set_signal_handler.
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sig_handler = handler
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old_handler = signal.signal(signum, sig_handler)
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siginterrupt(signum, False)
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return old_handler
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- if BZR_COLUMNS is set, returns its value
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- if there is no controlling terminal, returns None
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- query the OS, if the queried size has changed since the last query,
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- if COLUMNS is set, returns its value,
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- if the OS has a value (even though it's never changed), return its value.
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From there, we need to query the OS to get the size of the controlling
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On Unices we query the OS by:
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- get termios.TIOCGWINSZ
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- if an error occurs or a negative value is obtained, returns None
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On Windows we query the OS by:
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- win32utils.get_console_size() decides,
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- returns None on error (provided default value)
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# Note to implementors: if changing the rules for determining the width,
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# make sure you've considered the behaviour in these cases:
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# - M-x shell in emacs, where $COLUMNS is set and TIOCGWINSZ returns 0,0.
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# - bzr log | less, in bash, where $COLUMNS not set and TIOCGWINSZ returns
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# - (add more interesting cases here, if you find any)
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# Some programs implement "Use $COLUMNS (if set) until SIGWINCH occurs",
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# but we don't want to register a signal handler because it is impossible
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# to do so without risking EINTR errors in Python <= 2.6.5 (see
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# <http://bugs.python.org/issue8354>). Instead we check TIOCGWINSZ every
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# time so we can notice if the reported size has changed, which should have
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# If BZR_COLUMNS is set, take it, user is always right
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isatty = getattr(sys.stdout, 'isatty', None)
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if isatty is None or not isatty():
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if isatty is None or not isatty():
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# Don't guess, setting BZR_COLUMNS is the recommended way to override.
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width, height = os_size = _terminal_size(None, None)
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global _first_terminal_size, _terminal_size_state
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if _terminal_size_state == 'no_data':
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_first_terminal_size = os_size
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_terminal_size_state = 'unchanged'
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elif (_terminal_size_state == 'unchanged' and
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_first_terminal_size != os_size):
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_terminal_size_state = 'changed'
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# If the OS claims to know how wide the terminal is, and this value has
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# ever changed, use that.
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if _terminal_size_state == 'changed':
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if width is not None and width > 0:
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# If COLUMNS is set, use it.
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# If COLUMNS is set, take it, the terminal knows better (even inside a
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# given terminal, the application can decide to set COLUMNS to a lower
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# value (splitted screen) or a bigger value (scroll bars))
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return int(os.environ['COLUMNS'])
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except (KeyError, ValueError):
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# Finally, use an unchanged size from the OS, if we have one.
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if _terminal_size_state == 'unchanged':
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if width is not None and width > 0:
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width, height = _terminal_size(None, None)
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# Consider invalid values as meaning no width
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# The width could not be determined.
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def _win32_terminal_size(width, height):
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_terminal_size = _ioctl_terminal_size
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def _terminal_size_changed(signum, frame):
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"""Set COLUMNS upon receiving a SIGnal for WINdow size CHange."""
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width, height = _terminal_size(None, None)
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if width is not None:
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os.environ['COLUMNS'] = str(width)
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_registered_sigwinch = False
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def watch_sigwinch():
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"""Register for SIGWINCH, once and only once."""
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global _registered_sigwinch
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if not _registered_sigwinch:
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if sys.platform == 'win32':
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# Martin (gz) mentioned WINDOW_BUFFER_SIZE_RECORD from
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# ReadConsoleInput but I've no idea how to plug that in
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# the current design -- vila 20091216
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set_signal_handler(signal.SIGWINCH, _terminal_size_changed)
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_registered_sigwinch = True
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def supports_executable():
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return sys.platform != "win32"
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real_handlers[kind](abspath, relpath)
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def copy_ownership_from_path(dst, src=None):
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"""Copy usr/grp ownership from src file/dir to dst file/dir.
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If src is None, the containing directory is used as source. If chown
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fails, the error is ignored and a warning is printed.
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chown = getattr(os, 'chown', None)
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src = os.path.dirname(dst)
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chown(dst, s.st_uid, s.st_gid)
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trace.warning("Unable to copy ownership from '%s' to '%s': IOError: %s." % (src, dst, e))
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def path_prefix_key(path):
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"""Generate a prefix-order path key for path.
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return socket.gethostname().decode(get_user_encoding())
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# We must not read/write any more than 64k at a time from/to a socket so we
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# don't risk "no buffer space available" errors on some platforms. Windows in
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# particular is likely to throw WSAECONNABORTED or WSAENOBUFS if given too much
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MAX_SOCKET_CHUNK = 64 * 1024
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def read_bytes_from_socket(sock, report_activity=None,
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max_read_size=MAX_SOCKET_CHUNK):
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"""Read up to max_read_size of bytes from sock and notify of progress.
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Translates "Connection reset by peer" into file-like EOF (return an
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empty string rather than raise an error), and repeats the recv if
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interrupted by a signal.
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bytes = sock.recv(max_read_size)
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except socket.error, e:
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if eno == getattr(errno, "WSAECONNRESET", errno.ECONNRESET):
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# The connection was closed by the other side. Callers expect
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# an empty string to signal end-of-stream.
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elif eno == errno.EINTR:
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# Retry the interrupted recv.
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if report_activity is not None:
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report_activity(len(bytes), 'read')
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def recv_all(socket, count):
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def recv_all(socket, bytes):
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"""Receive an exact number of bytes.
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Regular Socket.recv() may return less than the requested number of bytes,
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depending on what's in the OS buffer. MSG_WAITALL is not available
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dependning on what's in the OS buffer. MSG_WAITALL is not available
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on all platforms, but this should work everywhere. This will return
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less than the requested amount if the remote end closes.
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This isn't optimized and is intended mostly for use in testing.
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while len(b) < count:
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new = read_bytes_from_socket(socket, None, count - len(b))
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while len(b) < bytes:
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new = until_no_eintr(socket.recv, bytes - len(b))
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def send_all(sock, bytes, report_activity=None):
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def send_all(socket, bytes, report_activity=None):
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"""Send all bytes on a socket.
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Breaks large blocks in smaller chunks to avoid buffering limitations on
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some platforms, and catches EINTR which may be thrown if the send is
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interrupted by a signal.
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This is preferred to socket.sendall(), because it avoids portability bugs
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and provides activity reporting.
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Regular socket.sendall() can give socket error 10053 on Windows. This
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implementation sends no more than 64k at a time, which avoids this problem.
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:param report_activity: Call this as bytes are read, see
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Transport._report_activity
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byte_count = len(bytes)
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while sent_total < byte_count:
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sent = sock.send(buffer(bytes, sent_total, MAX_SOCKET_CHUNK))
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except socket.error, e:
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if e.args[0] != errno.EINTR:
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report_activity(sent, 'write')
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def connect_socket(address):
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# Slight variation of the socket.create_connection() function (provided by
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# python-2.6) that can fail if getaddrinfo returns an empty list. We also
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# provide it for previous python versions. Also, we don't use the timeout
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# parameter (provided by the python implementation) so we don't implement
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err = socket.error('getaddrinfo returns an empty list')
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host, port = address
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for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
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af, socktype, proto, canonname, sa = res
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sock = socket.socket(af, socktype, proto)
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except socket.error, err:
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# 'err' is now the most recent error
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if sock is not None:
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for pos in xrange(0, len(bytes), chunk_size):
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block = bytes[pos:pos+chunk_size]
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if report_activity is not None:
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report_activity(len(block), 'write')
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until_no_eintr(socket.sendall, block)
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def dereference_path(path):
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def until_no_eintr(f, *a, **kw):
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"""Run f(*a, **kw), retrying if an EINTR error occurs.
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WARNING: you must be certain that it is safe to retry the call repeatedly
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if EINTR does occur. This is typically only true for low-level operations
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like os.read. If in any doubt, don't use this.
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Keep in mind that this is not a complete solution to EINTR. There is
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probably code in the Python standard library and other dependencies that
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may encounter EINTR if a signal arrives (and there is signal handler for
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that signal). So this function can reduce the impact for IO that bzrlib
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directly controls, but it is not a complete solution.
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"""Run f(*a, **kw), retrying if an EINTR error occurs."""
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# Borrowed from Twisted's twisted.python.util.untilConcludes function.
added
removed
bzrlib/osutils.py
