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#!/usr/bin/python3 -u
# vim: set fileencoding=utf-8 :
#
# (C) 2010,2014 Guido Günther <agx@sigxcpu.org>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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 errno
import glob
import os
import logging
import sys
from optparse import OptionParser
from . process import Process
from . distro import Distro
from . pkg import PkgError
from . systemd import Systemd
def check_maps(procs, shared_objects):
restart_procs = {}
for proc in procs:
for so in shared_objects:
if proc.maps(so):
if proc.exe in restart_procs:
restart_procs[proc.exe] += [proc]
else:
restart_procs[proc.exe] = [proc]
break
return restart_procs
def get_all_pids():
processes = []
paths = glob.glob('/proc/[0-9]*')
for path in paths:
p = Process(int(path.rsplit('/')[-1]))
processes.append(p)
return processes
def write_cmd_file(services, cmd_file, distro):
"Write out commands needed to restart the services to a file"
out = open(cmd_file, 'w')
print('#! /bin/sh', file=out)
for service in services:
logging.info("Need to restart '%s'", service)
print(" ".join(distro.restart_service_cmd(service)), file=out)
out.close()
os.chmod(cmd_file, 0o755)
def find_pkgs(procs, distro):
"""
Find packages that contain the binaries of the given processes
"""
pkgs = {}
for proc in procs:
pkg = distro.pkg_by_file(proc)
if not pkg:
logging.warning("No package found for '%s' - restart manually" % proc)
else:
if pkg.name in pkgs:
pkgs[pkg.name].procs.append(proc)
else:
pkg.procs = [proc]
pkgs[pkg.name] = pkg
if pkgs:
logging.info("Packages that ship the affected binaries:")
for pkg in list(pkgs.values()):
logging.info(" Pkg: %s, binaries: %s" % (pkg.name, pkg.procs))
return pkgs
def find_services(pkgs, distro):
"""
Determine the services in pkgs honoring distro specific mappings
and blacklists
"""
all_services = set()
for pkg in list(pkgs.values()):
services = set(pkg.services + distro.pkg_services(pkg))
services -= set(distro.pkg_service_blacklist(pkg))
if not services:
logging.warning("No service script found in '%s' for '%s' "
"- restart manually" % (pkg.name, pkg.procs))
else:
all_services.update(services)
all_services -= distro.service_blacklist
return all_services
def find_systemd_units(procmap, distro):
"""Find systemd units that contain the given processes"""
units = set()
for dummy, procs in list(procmap.items()):
for proc in procs:
try:
unit = Systemd.process_to_unit(proc)
except ValueError as e:
logging.warning("No systemd unit found for '%s': %s "
"- restart manually" % (proc.exe, e))
continue
if not unit:
logging.warning("No systemd unit found for '%s' "
"- restart manually" % proc.exe)
else:
units.add(unit)
units -= set([service + '.service' for service in distro.service_blacklist])
return units
def main(argv):
shared_objects = []
services = None
parser = OptionParser(usage='%prog [options] pkg1 [pkg2 pkg3 pkg4]')
parser.add_option("--debug", action="store_true", dest="debug",
default=False, help="enable debug output")
parser.add_option("--verbose", action="store_true", dest="verbose",
default=False, help="enable verbose output")
parser.add_option("--restart", action="store_true", dest="restart",
default=False, help="Restart services")
parser.add_option("--print-cmds", dest="print_cmds",
help="Output restart commands to file instead of restarting")
parser.add_option("--apt", action="store_true", dest="apt", default=False,
help="Use in apt pipeline")
(options, args) = parser.parse_args(argv[1:])
if options.debug:
level = logging.DEBUG
elif options.verbose:
level = logging.INFO
else:
level = logging.WARNING
logging.basicConfig(level=level,
format='%(levelname)s: %(message)s')
distro = Distro.detect()
if not distro:
logging.error("Unsupported Distribution")
return 1
else:
logging.debug("Detected distribution: '%s'", distro.id)
if args:
pkgs = [distro.pkg(arg) for arg in args]
elif options.apt and distro.has_apt():
try:
pkgs = distro.read_apt_pipeline()
except PkgError:
logging.error("Can't read apt pipeline")
return 1
if not pkgs:
return 0
pkgs, notfound = distro.filter_security_updates(pkgs)
if notfound:
logging.warning("Pkgs %s not found in apt cache" % ", ".join(notfound))
logging.debug("Security Upgrades: %s" % pkgs)
else:
parser.print_help()
return 1
# Find shared objects of updated packages
for pkg in pkgs:
try:
shared_objects += pkg.shared_objects
except PkgError:
logging.error("Cannot parse contents of %s" % pkg.name)
return 1
logging.debug("Found shared objects:")
for so in shared_objects:
logging.debug(" %s", so)
# Find processes that map them
try:
restart_procs = check_maps(get_all_pids(), shared_objects)
except IOError as e:
if e.errno == errno.EACCES:
logging.error("Can't open process maps in '/proc/<pid>/maps', are you root?")
return 1
else:
raise
logging.debug("Processes that map them:")
for exe, pids in list(restart_procs.items()):
logging.debug(" Exe: %s Pids: %s", exe, pids),
if Systemd.is_running():
logging.debug("Detected Systemd")
services = find_systemd_units(restart_procs, distro)
else:
# Find the packages that contain the binaries the processes are
# executing
pkgs = find_pkgs(restart_procs, distro)
# Find the services in these packages honoring distro specific
# mappings and blacklists
try:
services = find_services(pkgs, distro)
except NotImplementedError:
if level > logging.INFO:
logging.error("Getting Service listing not implemented "
"for distribution %s - rerun with --verbose to see a list"
"of binaries that map a shared objects from %s",
distro.id, args)
return 1
else:
return 0
if options.restart:
if options.print_cmds and services:
write_cmd_file(services, options.print_cmds, distro)
else:
for service in services:
logging.info("Restarting '%s'" % service)
distro.restart_service(service)
elif services:
print("Services that possibly need to be restarted:")
for s in services:
print(s)
return 0
def run():
return(main(sys.argv))
if __name__ == '__main__':
sys.exit(main(sys.argv))
# vim:et:ts=4:sw=4:et:sts=4:ai:set list listchars=tab\:»·,trail\:·:
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