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# fsh - fast remote execution
# Copyright (C) 2001 by Per Cederqvist.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
# Python 2.2 moved some constants from FCNTL to other modules, and
# dropped FD_CLOEXEC completely. The relevant constants are now
# accessed via this module, that tries to get the constants as
# portably as possible.
import os
import fcntl
# O_NONBLOCK used to be present in FCNTL, but in Python 2.2 the only
# way to get it is via the os module.
try:
O_NONBLOCK = os.O_NONBLOCK
except:
import FCNTL
O_NONBLOCK = FCNTL.O_NONBLOCK
# F_GETFD is present in FCNTL, but in Python 2.2 that module is
# deprecated, so we try to use fcntl instead.
try:
F_GETFD = fcntl.F_GETFD
except:
import FCNTL
F_GETFD = FCNTL.F_GETFD
# F_SETFD is present in FCNTL, but in Python 2.2 that module is
# deprecated, so we try to use fcntl instead.
try:
F_SETFD = fcntl.F_SETFD
except:
import FCNTL
F_SETFD = FCNTL.F_SETFD
# FD_CLOEXEC used to be present in FCNTL, but in Python 2.2 it isn't
# available at all! I have reported the inability to find FD_CLOEXEC
# in Python 2.2 as a bug. See <URL:http://sourceforge.net/tracker/
# ?func=detail&aid=496171&group_id=5470&atid=105470>.
try:
# Stop Python 2.2 from warning that we import a deprecated module.
# But Python 1.5.2 doesn't have the warnings module, so be prepared
# for the import statement to fail.
try:
import warnings
warnings.filterwarnings(
"ignore",
"the FCNTL module is deprecated; please use fcntl",
DeprecationWarning)
except ImportError:
pass
import FCNTL
FD_CLOEXEC = FCNTL.FD_CLOEXEC
except AttributeError:
# The value of FD_CLOEXEC is 1 on Solaris 8, HP-UX 11, Unicos 9.0,
# Digital UNIX 4.0, SunOS 4.1.1_U1, IRIX 6.5, Linux 2.0 and Linux
# 2.4 with glibc 2.2.3. It is 1 even on AIX 4.2, so I guess it is
# a fairly universal constant.
FD_CLOEXEC = 1
# If you find a system where the above definition of FD_CLOEXEC is
# wrong, and where Python has been ported, please report it as a
# bug to
#
# http://bugzilla.lysator.liu.se/enter_bug.cgi?product=fsh
#
# Remember to state the operating system you are using (in the
# format returned by os.uname()), and the proper value of
# FD_CLOEXEC.
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