mirror of
https://gerrit.ovirt.org/vdsm
synced 2026-02-05 21:46:27 +01:00
992f635a4e
reduced W504 issues by covering init, static and vdsm_hooks directories. Updated statistics. Change-Id: Iab72f7cb01aae8862cb72e5afa474eed91e4112d Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>
131 lines
4.6 KiB
Python
Executable File
131 lines
4.6 KiB
Python
Executable File
#!/usr/bin/python3
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# Copyright 2013 IBM, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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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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#
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# Refer to the README and COPYING files for full details of the license
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#
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from __future__ import absolute_import
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import argparse
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import os
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import sys
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import syslog
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import traceback
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from stat import S_IRUSR, S_IWUSR
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from vdsm.config import config
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class DaemonAdapter(object):
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def __init__(self):
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self._args = None
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def _parse_args(self):
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parser = argparse.ArgumentParser(
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description='Start daemon process with various daemon options')
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parser.add_argument(
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'-0', '--stdin', dest='stdin', default=None,
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metavar='dest', help='Redirect stdin to new destination')
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parser.add_argument(
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'-1', '--stdout', dest='stdout', default=None,
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metavar='dest', help='Redirect stdout to new destination')
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parser.add_argument(
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'-2', '--stderr', dest='stderr', default=None,
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metavar='dest', help='Redirect stderr to new destination')
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parser.add_argument(
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'--syslog', dest='syslog', default=False, action='store_true',
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help='Reporting errors to syslog when specified')
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parser.add_argument(
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'target', action='store', nargs=1, metavar='targetFullPath',
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help='Full path of the target binary to start')
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parser.add_argument(
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'targetOptions', default=list(), nargs=argparse.REMAINDER,
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metavar='target_opt0 target_opt1 ...', action='store',
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help='Add options to be passed to target')
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self._args = parser.parse_args(sys.argv[1:])
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def _log(self, msg):
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if self._args and self._args.syslog:
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for m in msg.splitlines():
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syslog.syslog(m)
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else:
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sys.stderr.write("%s\n" % msg)
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def execute(self):
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try:
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self._parse_args()
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os.nice(config.getint('vars', 'vdsm_nice'))
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env = os.environ.copy()
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# Python path is needed to get sitecustomize.py imported from
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# target directory.
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pythonpath = os.path.dirname(self._args.target[0])
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if 'PYTHONPATH' in env:
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pythonpath += ':' + env['PYTHONPATH']
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env.update({
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'LIBVIRT_DEBUG': config.get(
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'vars', 'libvirt_env_variable_debug'),
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'LIBVIRT_LOG_FILTERS': config.get(
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'vars', 'libvirt_env_variable_log_filters'),
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'LIBVIRT_LOG_OUTPUTS': config.get(
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'vars', 'libvirt_env_variable_log_outputs'),
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'LC_ALL': 'C.UTF8',
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'PYTHONPATH': pythonpath,
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})
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cmd = [self._args.target[0]] + self._args.targetOptions
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if self._args.stdin:
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fdin = os.open(self._args.stdin, os.O_RDONLY)
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os.dup2(fdin, sys.stdin.fileno())
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os.close(fdin)
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# stdout and stderr redirection should be in last minute,
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# otherwise it swallows error messages from daemonAdapter when
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# redirected to /dev/null.
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if self._args.stdout:
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fdout = os.open(
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self._args.stdout,
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os.O_WRONLY | os.O_CREAT | os.O_APPEND,
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S_IRUSR | S_IWUSR
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)
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os.dup2(fdout, sys.stdout.fileno())
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os.close(fdout)
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if self._args.stderr:
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fderr = os.open(
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self._args.stderr,
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os.O_WRONLY | os.O_CREAT | os.O_APPEND,
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S_IRUSR | S_IWUSR
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)
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os.dup2(fderr, sys.stderr.fileno())
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os.close(fderr)
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os.execve(cmd[0], cmd, env)
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except Exception:
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self._log("Error in daemonAdapater: %s " % traceback.format_exc())
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finally:
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return 1
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if __name__ == '__main__':
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d = DaemonAdapter()
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sys.exit(d.execute())
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