Limnoria/scripts/supybot-botchk

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#!/usr/bin/env python3
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###
# Copyright (c) 2005, Jeremiah Fincher
# Copyright (c) 2009, James McCoy
# Copyright (c) 2010-2021, Valentin Lorentz
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# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
VERBOSE = False
def readPid(filename):
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fd = open(filename)
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try:
return int(fd.read().strip())
finally:
fd.close()
def isAlive(pid):
try:
os.kill(pid, 0)
return True
except OSError:
return False
def debug(s):
if VERBOSE:
if not s.endswith(os.linesep):
s += os.linesep
sys.stdout.write(s)
if __name__ == '__main__':
# XXX I wanted this for conf.version, but this will create directories. We
# really need to refactor conf so it either doesn't create directories, or
# so that static information (like the version) can be imported from
# somewhere else.
# import supybot.conf as conf
import os
import sys
import optparse
import subprocess
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parser = optparse.OptionParser(usage='Usage: %prog [options]')
parser.add_option('', '--verbose', action='store_true',
help='Makes output verbose.')
parser.add_option('', '--botdir',
help='Determines what directory the bot resides in and '
'should be started from.')
parser.add_option('', '--pidfile',
help='Determines what file to look in for the pid of '
'the running bot. This should be relative to the '
'given bot directory. Note that for this to actually '
'work, you have to make a matching entry in the '
'supybot.pidFile config in the supybot registry.')
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parser.add_option('', '--supybot', default='supybot',
help='Determines where the supybot executable is '
'located. If not given, assumes that supybot is '
'in $PATH.')
parser.add_option('', '--conffile',
help='Determines what configuration file should be '
'given to the supybot executable when (re)starting the '
'bot.')
(options, args) = parser.parse_args()
VERBOSE = options.verbose
if args:
parser.error('Extra arguments given.')
if not options.botdir:
parser.error('No botdir given.')
if not options.pidfile:
parser.error('No pidfile given.')
if not options.conffile:
parser.error('No conffile given.')
os.chdir(options.botdir)
open(options.pidfile, 'a').close()
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pid = None
try:
pid = readPid(options.pidfile)
debug('Found pidFile with proper pid contents of %s' % pid)
except ValueError as e:
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foundBot = False
if pid is not None:
foundBot = isAlive(pid)
if foundBot:
debug('Pid %s is alive and belongs to us.' % pid)
else:
debug('Pid %s is not the bot.' % pid)
if not foundBot:
# First, we check if the pidfile is writable. If not, supybot will just exit,
# so we go ahead and refuse to start it.
try:
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open(options.pidfile, 'r+')
except EnvironmentError as e:
debug('pidfile (%s) is not writable: %s' % (options.pidfile, e))
sys.exit(-1)
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debug('Bot not found, starting.')
cmdline = [options.supybot, '--daemon', options.conffile]
inst = subprocess.Popen(cmdline, close_fds=True,
stderr=subprocess.STDOUT,
stdin=None, stdout=subprocess.PIPE)
debug('Output from supybot: %r' % inst.stdout.read())
ret = inst.wait()
debug('Bot started, command line %r returned %s.' % (' '.join(cmdline),
ret))
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sys.exit(ret)
else:
sys.exit(0)
# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79: