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#!/usr/bin/python -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 glob
import os
import logging
import re
import string
import subprocess
import sys
import errno
from optparse import OptionParser
try:
import lsb_release
except ImportError:
lsb_release = None
from . process import Process
from . distro import Distro
from . pkg import Pkg, PkgError
class DebianPkg(Pkg):
type = 'Debian'
_init_script_re = re.compile('/etc/init.d/[\w\-\.]')
_list_contents = ['dpkg-query', '-L', '${pkg_name}' ]
def __init__(self, name):
Pkg.__init__(self, name)
@property
def shared_objects(self):
if self._shared_objects != None:
return self._shared_objects
self._shared_objects = []
contents = self._get_contents()
for line in contents:
m = self._so_regex.match(line)
if m:
self._shared_objects.append(m.group('so'))
return self._shared_objects
@property
def services(self):
if self._services != None:
return self._services
self._services = []
contents = self._get_contents()
# Only supports sysvinit so far:
for line in contents:
if self._init_script_re.match(line):
self._services.append(os.path.basename(line.strip()))
return self._services
class RedHatDistro(Distro):
"RPM based distribution"""
_pkg_re = re.compile(r'(?P<pkg>[\w\-\+]+)-(?P<ver>[\w\.]+)'
'-(?P<rel>[\w\.]+)\.(?P<arch>.+)')
@classmethod
def pkg(klass, name):
return RpmPkg(name)
@classmethod
def pkg_by_file(klass, path):
find_file = subprocess.Popen(['rpm', '-qf', path],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
output = find_file.communicate()[0]
if find_file.returncode:
return None
m = klass._pkg_re.match(output.strip())
if m:
pkg = m.group('pkg')
else:
pkg = output.strip()
return RpmPkg(pkg)
@classmethod
def restart_service_cmd(klass, name):
return ['service', name, 'restart']
class FedoraDistro(RedHatDistro):
id = 'Fedora'
class RpmPkg(Pkg):
type = 'RPM'
_init_script_re = re.compile('/etc/rc.d/init.d/[\w\-\.]')
_list_contents = [ 'rpm', '-ql', '$pkg_name' ]
def __init__(self, name):
Pkg.__init__(self, name)
@property
def shared_objects(self):
if self._shared_objects != None:
return self._shared_objects
self._shared_objects = []
contents = self._get_contents()
for line in contents:
m = self._so_regex.match(line)
if m:
self._shared_objects.append(m.group('so'))
return self._shared_objects
@property
def services(self):
if self._services != None:
return self._services
self._services = []
contents = self._get_contents()
# Only supports sysvinit so far:
for line in contents:
if self._init_script_re.match(line):
self._services.append(os.path.basename(line.strip()))
return self._services
def check_maps(procs, shared_objects):
restart_procs = {}
for proc in procs:
for so in shared_objects:
if proc.maps(so):
if restart_procs.has_key(proc.exe):
restart_procs[proc.exe] += [ proc ]
else:
restart_procs[proc.exe] = [ proc ]
continue
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 detect_distro():
id = None
if lsb_release:
id = lsb_release.get_distro_information()['ID']
else:
try:
lsb_cmd = subprocess.Popen(['lsb_release', '--id', '-s'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
output = lsb_cmd.communicate()[0]
if not lsb_cmd.returncode:
id = output.strip()
except OSError:
# id is None in this case
pass
if id == DebianDistro.id:
return DebianDistro
elif id == FedoraDistro.id:
return FedoraDistro
else:
if os.path.exists('/usr/bin/dpkg'):
logging.warning("Unknown distro but dpkg found, assuming Debian")
return DebianDistro
elif os.path.exists('/bin/rpm'):
logging.warning("Unknown distro but rpm found, assuming Fedora")
return FedoraDistro
else:
return None
def write_cmd_file(services, cmd_file, distro):
"Write out commands needed to restart the services to a file"
out = file(cmd_file, 'w')
print >>out, '#! /bin/sh'
for service in services:
logging.debug("Need to restart %s", service)
print >>out, " ".join(distro.restart_service_cmd(service))
out.close()
os.chmod(cmd_file, 0755)
def main(argv):
shared_objects = []
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 = detect_distro()
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 = distro.filter_security_updates(pkgs)
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:")
map(lambda x: logging.debug(" %s", x), shared_objects)
# Find processes that map them
restart_procs = check_maps(get_all_pids(), shared_objects)
logging.debug("Processes that map them:")
map(lambda (x, y): logging.debug(" Exe: %s Pids: %s", x, y),
restart_procs.items())
# Find packages that contain the binaries of these processes
pkgs = {}
for proc in restart_procs:
pkg = distro.pkg_by_file(proc)
if not pkg:
logging.warning("No package found for '%s' - restart manually" % proc)
else:
if pkgs.has_key(pkg.name):
pkgs[pkg.name].procs.append(proc)
else:
pkg.procs = [ proc ]
pkgs[pkg.name] = pkg
logging.info("Packages that ship the affected binaries:")
map(lambda x: logging.info(" Pkg: %s, binaries: %s" % (x.name, x.procs)),
pkgs.values())
all_services = set()
try:
for pkg in 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
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 and packages to map a shared objects from %s",
distro.id, args)
return 1
else:
return 0
if options.restart:
if options.print_cmds and all_services:
write_cmd_file(all_services, options.print_cmds, distro)
else:
for service in all_services:
logging.info("Restarting %s" % service)
distro.restart_service(service)
elif all_services:
print "Services that possibly need to be restarted:"
for s in all_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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