home *** CD-ROM | disk | FTP | other *** search
- # telepathy-python - Base classes defining the interfaces of the Telepathy framework
- #
- # Copyright (C) 2008 Collabora Limited
- #
- # This library is free software; you can redistribute it and/or
- # modify it under the terms of the GNU Lesser General Public
- # License as published by the Free Software Foundation; either
- # version 2.1 of the License, or (at your option) any later version.
- #
- # This library 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
- # Lesser General Public License for more details.
- #
- # You should have received a copy of the GNU Lesser General Public
- # License along with this library; if not, write to the Free Software
- # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
- import os
- import sys
-
- def debug_divert_messages(filename):
- """debug_divert_messages:
- @filename: A file to which to divert stdout and stderr or None to do
- nothing.
-
- Open the given file for writing and duplicate its file descriptor to
- be used for stdout and stderr. This has the effect of closing the previous
- stdout and stderr, and sending all messages that would have gone there
- to the given file instead.
-
- By default the file is truncated and hence overwritten each time the
- process is executed.
- If the filename is prefixed with '+' then the file is not truncated and
- output is added at the end of the file.
- Passing None to this function is guaranteed to have no effect. This is
- so you can call it with the recommended usage
- debug_divert_messages (os.getenv('MYAPP_LOGFILE'))
- and it won't do anything if the environment variable is not set."""
-
- if filename is None:
- return
-
- try:
- if filename.startswith('+'):
- logfile = open(filename[1:], 'a')
- else:
- logfile = open(filename, 'w')
- except IOError, e:
- print "Can't open logfile '%s' : '%s'" % (filename, e)
- return
-
- sys.stdout = logfile
- sys.stderr = logfile
-