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#!/usr/bin/env python
#
# $Id$
#
# Copyright (C) 2014 Dragon Research Labs ("DRL")
# Portions copyright (C) 2013 Internet Systems Consortium ("ISC")
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notices and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND DRL AND ISC DISCLAIM ALL
# WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DRL OR
# ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
# DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
# OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
# TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
"""
Cron job for rcynic and rpki-rtr in stock configuration.
Locking code here works like FreeBSD's lockf(1) utility given -k and
-t 0 options, which is both the sanest and simplest combination for
our purposes. In theory this is portable to any Unix-like system.
"""
import os
import sys
import pwd
import fcntl
import errno
import argparse
import rpki.autoconf
def run(*cmd, **kwargs):
chroot_this = kwargs.pop("chroot_this", False)
cwd = kwargs.pop("cwd", None)
pid = os.fork()
if pid == 0:
if chroot_this:
os.chdir(rpki.autoconf.RCYNIC_DIR)
elif cwd is not None:
os.chdir(cwd)
if we_are_root:
os.initgroups(pw.pw_name, pw.pw_gid)
if chroot_this:
os.chroot(rpki.autoconf.RCYNIC_DIR)
if we_are_root:
os.setgid(pw.pw_gid)
os.setuid(pw.pw_uid)
os.closerange(3, os.sysconf("SC_OPEN_MAX"))
os.execvp(cmd[0], cmd)
os._exit(1) # pylint: disable=W0212
else:
status = os.waitpid(pid, 0)[1]
if status == 0:
return
elif os.WIFSIGNALED(status):
sys.exit("Process %s exited with signal %s" % (" ".join(cmd), os.WTERMSIG(status)))
elif os.WIFEXITED(status):
sys.exit("Program %s exited with status %s" % (" ".join(cmd), os.WEXITSTATUS(status)))
else:
sys.exit("Program %s exited for unknown reason %s" % (" ".join(cmd), status))
parser = argparse.ArgumentParser(description = __doc__)
parser.add_argument("--chroot", action = "store_true", help = "run chrooted")
args = parser.parse_args()
we_are_root = os.getuid() == 0
if args.chroot and not we_are_root:
sys.exit("Only root can --chroot")
try:
pw = pwd.getpwnam(rpki.autoconf.RCYNIC_USER)
except KeyError:
sys.exit("Could not find passwd entry for user %s" % rpki.autoconf.RCYNIC_USER)
try:
lock = os.open(os.path.join(rpki.autoconf.RCYNIC_DIR, "data/lock"),
os.O_RDONLY | os.O_CREAT | os.O_NONBLOCK, 0666)
fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
if we_are_root:
os.fchown(lock, pw.pw_uid, pw.pw_gid)
except (IOError, OSError), e:
if e.errno == errno.EAGAIN:
sys.exit(0) # Another instance of this script is already running, exit silently
else:
sys.exit("Error %r opening lock %r" % (e.strerror, os.path.join(rpki.autoconf.RCYNIC_DIR, "data/lock")))
if args.chroot:
run("/bin/rcynic", "-c", "/etc/rcynic.conf", chroot_this = True)
else:
run(os.path.join(rpki.autoconf.bindir, "rcynic"), "-c", os.path.join(rpki.autoconf.sysconfdir, "rcynic.conf"))
run(os.path.join(rpki.autoconf.bindir, "rpki-rtr"),
"cronjob",
os.path.join(rpki.autoconf.RCYNIC_DIR, "data/authenticated"),
cwd = os.path.join(rpki.autoconf.RCYNIC_DIR, "rpki-rtr"))
prog = os.path.join(rpki.autoconf.libexecdir, "rpkigui-rcynic")
if os.path.exists(prog):
run(prog)
if rpki.autoconf.RCYNIC_HTML_DIR and os.path.exists(os.path.dirname(rpki.autoconf.RCYNIC_HTML_DIR)):
run(os.path.join(rpki.autoconf.bindir, "rcynic-html"),
os.path.join(rpki.autoconf.RCYNIC_DIR, "data/rcynic.xml"),
rpki.autoconf.RCYNIC_HTML_DIR)
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