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# vi: ts=4 expandtab
#
# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# 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, see <http://www.gnu.org/licenses/>.
import inspect
import signal
import sys
from StringIO import StringIO
from cloudinit import log as logging
from cloudinit import util
from cloudinit import version as vr
LOG = logging.getLogger(__name__)
BACK_FRAME_TRACE_DEPTH = 3
EXIT_FOR = {
signal.SIGINT: ('Cloud-init %(version)s received SIGINT, exiting...', 1),
signal.SIGTERM: ('Cloud-init %(version)s received SIGTERM, exiting...', 1),
# Can't be caught...
# signal.SIGKILL: ('Cloud-init killed, exiting...', 1),
signal.SIGABRT: ('Cloud-init %(version)s received SIGABRT, exiting...', 1),
}
def _pprint_frame(frame, depth, max_depth, contents):
if depth > max_depth or not frame:
return
frame_info = inspect.getframeinfo(frame)
prefix = " " * (depth * 2)
contents.write("%sFilename: %s\n" % (prefix, frame_info.filename))
contents.write("%sFunction: %s\n" % (prefix, frame_info.function))
contents.write("%sLine number: %s\n" % (prefix, frame_info.lineno))
_pprint_frame(frame.f_back, depth + 1, max_depth, contents)
def _handle_exit(signum, frame):
(msg, rc) = EXIT_FOR[signum]
msg = msg % ({'version': vr.version()})
contents = StringIO()
contents.write("%s\n" % (msg))
_pprint_frame(frame, 1, BACK_FRAME_TRACE_DEPTH, contents)
util.multi_log(contents.getvalue(),
console=True, stderr=False, log=LOG)
sys.exit(rc)
def attach_handlers():
sigs_attached = 0
for signum in EXIT_FOR.keys():
signal.signal(signum, _handle_exit)
sigs_attached += len(EXIT_FOR)
return sigs_attached
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