" % \
(self.states[file.closed], file.name, file.mode, \
hex(id(self))[2:])
#
# Initialization routines
#
def open(self, name, mode='r', bufsize=-1):
import __builtin__
return self.fileopen(__builtin__.open(name, mode, bufsize))
def fileopen(self, file):
import types
if repr(type(file)) != "":
raise TypeError, 'posixfile.fileopen() arg must be file object'
self._file_ = file
# Copy basic file methods
for maybemethod in dir(file):
if not maybemethod.startswith('_'):
attr = getattr(file, maybemethod)
if isinstance(attr, types.BuiltinMethodType):
setattr(self, maybemethod, attr)
return self
#
# New methods
#
def file(self):
return self._file_
def dup(self):
import posix
if not hasattr(posix, 'fdopen'):
raise AttributeError, 'dup() method unavailable'
return posix.fdopen(posix.dup(self._file_.fileno()), self._file_.mode)
def dup2(self, fd):
import posix
if not hasattr(posix, 'fdopen'):
raise AttributeError, 'dup() method unavailable'
posix.dup2(self._file_.fileno(), fd)
return posix.fdopen(fd, self._file_.mode)
def flags(self, *which):
import fcntl, os
if which:
if len(which) > 1:
raise TypeError, 'Too many arguments'
which = which[0]
else: which = '?'
l_flags = 0
if 'n' in which: l_flags = l_flags | os.O_NDELAY
if 'a' in which: l_flags = l_flags | os.O_APPEND
if 's' in which: l_flags = l_flags | os.O_SYNC
file = self._file_
if '=' not in which:
cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if '!' in which: l_flags = cur_fl & ~ l_flags
else: l_flags = cur_fl | l_flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
if 'c' in which:
arg = ('!' not in which) # 0 is don't, 1 is do close on exec
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
if '?' in which:
which = '' # Return current flags
l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
if os.O_APPEND & l_flags: which = which + 'a'
if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
which = which + 'c'
if os.O_NDELAY & l_flags: which = which + 'n'
if os.O_SYNC & l_flags: which = which + 's'
return which
def lock(self, how, *args):
import struct, fcntl
if 'w' in how: l_type = fcntl.F_WRLCK
elif 'r' in how: l_type = fcntl.F_RDLCK
elif 'u' in how: l_type = fcntl.F_UNLCK
else: raise TypeError, 'no type of lock specified'
if '|' in how: cmd = fcntl.F_SETLKW
elif '?' in how: cmd = fcntl.F_GETLK
else: cmd = fcntl.F_SETLK
l_whence = 0
l_start = 0
l_len = 0
if len(args) == 1:
l_len = args[0]
elif len(args) == 2:
l_len, l_start = args
elif len(args) == 3:
l_len, l_start, l_whence = args
elif len(args) > 3:
raise TypeError, 'too many arguments'
# Hack by davem@magnet.com to get locking to go on freebsd;
# additions for AIX by Vladimir.Marangozov@imag.fr
import sys, os
if sys.platform in ('netbsd1',
'openbsd2',
'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5',
'freebsd6', 'freebsd7', 'freebsd8',
'bsdos2', 'bsdos3', 'bsdos4'):
flock = struct.pack('lxxxxlxxxxlhh', \
l_start, l_len, os.getpid(), l_type, l_whence)
elif sys.platform in ('aix3', 'aix4'):
flock = struct.pack('hhlllii', \
l_type, l_whence, l_start, l_len, 0, 0, 0)
else:
flock = struct.pack('hhllhh', \
l_type, l_whence, l_start, l_len, 0, 0)
flock = fcntl.fcntl(self._file_.fileno(), cmd, flock)
if '?' in how:
if sys.platform in ('netbsd1',
'openbsd2',
'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5',
'bsdos2', 'bsdos3', 'bsdos4'):
l_start, l_len, l_pid, l_type, l_whence = \
struct.unpack('lxxxxlxxxxlhh', flock)
elif sys.platform in ('aix3', 'aix4'):
l_type, l_whence, l_start, l_len, l_sysid, l_pid, l_vfs = \
struct.unpack('hhlllii', flock)
elif sys.platform == "linux2":
l_type, l_whence, l_start, l_len, l_pid, l_sysid = \
struct.unpack('hhllhh', flock)
else:
l_type, l_whence, l_start, l_len, l_sysid, l_pid = \
struct.unpack('hhllhh', flock)
if l_type != fcntl.F_UNLCK:
if l_type == fcntl.F_RDLCK:
return 'r', l_len, l_start, l_whence, l_pid
else:
return 'w', l_len, l_start, l_whence, l_pid
def open(name, mode='r', bufsize=-1):
"""Public routine to open a file as a posixfile object."""
return _posixfile_().open(name, mode, bufsize)
def fileopen(file):
"""Public routine to get a posixfile object from a Python file object."""
return _posixfile_().fileopen(file)
#
# Constants
#
SEEK_SET = 0
SEEK_CUR = 1
SEEK_END = 2
#
# End of posixfile.py
#