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#!/usr/bin/python -tt # 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 2 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, write to the Free Software Foundation, # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # Copyright 2009 Red Hat Inc # written by Seth Vidal # look through list of running apps # report any app which was updated after it was started # (and therefore needs to be restarted) # for each /proc/number-dir # get stat of create time on that dir # open up smaps and search for all lines with 'fd:' in them # take filename # search for the package owning that file # make a list of installtimes of all pkgs of the files the program has open # sort the list # if the dir create time is < the largest time on the installtimes list # then output the pid and process cmdline as needing to be restarted #TODO: # maybe note deleted files which are not owned by any pkg but which an app # is still using # output userids, too? import sys import os import yum import yum.misc import glob import stat from optparse import OptionParser from yum.Errors import RepoError sys.path.insert(0,'/usr/share/yum-cli') import utils # For which package updates we should recommend a reboot # Taken from https://access.redhat.com/solutions/27943 REBOOTPKGS = ['kernel', 'kernel-rt', 'glibc', 'linux-firmware', 'systemd', 'udev', 'openssl-libs', 'gnutls', 'dbus'] def parseargs(args): usage = """ needs-restarting: Report a list of process ids of programs that started running before they or some component they use were updated. """ parser = OptionParser(usage=usage) parser.add_option("-u", "--useronly", default=False, action="store_true", help='show processes for my userid only') parser.add_option("-r", "--reboothint", default=False, action="store_true", help=('only report whether a full reboot is required (exit code 1) or ' 'not (exit code 0)')) parser.add_option("-s", "--services", default=False, action="store_true", help='list the affected systemd services only') (opts, args) = parser.parse_args(args) return (opts, args) def return_running_pids(uid=None): mypid = os.getpid() pids = [] for fn in glob.glob('/proc/[0123456789]*'): if mypid == os.path.basename(fn): continue if uid: # meaning we're not root and we've added -u if os.stat(fn)[stat.ST_UID] != uid: continue pids.append(os.path.basename(fn)) return pids def get_open_files(pid): files = [] smaps = '/proc/%s/smaps' % pid try: with open(smaps, 'r') as maps_f: maps = maps_f.readlines() except (IOError, OSError), e: print >>sys.stderr, "Could not open %s" % smaps return files for line in maps: slash = line.find('/') if slash == -1 or line.find('00:') != -1: # if we don't have a '/' or if we fine 00: in the file then it's not _REALLY_ a file continue line = line.replace('\n', '') filename = line[slash:] filename = filename.split(';')[0] filename = filename.strip() if filename not in files: files.append(filename) return files def get_service(pid): """Return the systemd service to which the process belongs. More details: http://0pointer.de/blog/projects/systemd-for-admins-2.html https://www.freedesktop.org/wiki/Software/systemd/FrequentlyAskedQuestions/ """ fname = '/proc/%s/cgroup' % pid try: with open(fname, 'r') as f: groups = f.readlines() except (IOError, OSError), e: print >>sys.stderr, "Could not open %s" % fname return None for line in groups: line = line.replace('\n', '') hid, hsub, cgroup = line.split(':') if hsub == 'name=systemd': name = cgroup.split('/')[-1] if name.endswith('.service'): return name return None def main(args): (opts, args) = parseargs(args) my = yum.YumBase() my.preconf.init_plugins=False if hasattr(my, 'setCacheDir'): my.setCacheDir() my.conf.cache = True myuid = None if opts.useronly: myuid = os.getuid() boot_time = utils.get_boot_time() if opts.reboothint: needing_reboot = set() for pkg in my.rpmdb.searchNames(REBOOTPKGS): if float(pkg.installtime) > float(boot_time): needing_reboot.add(pkg) if needing_reboot: print 'Core libraries or services have been updated:' for pkg in needing_reboot: print ' %s ->' % pkg.name, pkg.printVer() print print 'Reboot is required to ensure that your system benefits', print 'from these updates.' print print 'More information:' print 'https://access.redhat.com/solutions/27943' return 1 else: print 'No core libraries or services have been updated.' print 'Reboot is probably not necessary.' return 0 needing_restart = set() for pid in return_running_pids(uid=myuid): try: pid_start = utils.get_process_time(int(pid), boot_time)['start_time'] except (OSError, IOError), e: continue found_match = False for fn in get_open_files(pid): if found_match: break just_fn = fn.replace('(deleted)', '') just_fn = just_fn.strip() bogon = False # if the file is in a pkg which has been updated since we started the pid - then it needs to be restarted for pkg in my.rpmdb.searchFiles(just_fn): if float(pkg.installtime) > float(pid_start): needing_restart.add(pid) found_match = True continue if just_fn in pkg.ghostlist: bogon = True break if bogon: continue # if the file is deleted if fn.find('(deleted)') != -1: # and it is from /*bin/* then it needs to be restarted if yum.misc.re_primary_filename(just_fn): needing_restart.add(pid) found_match = True continue # if the file is from an old ver of an installed pkg - then assume it was just updated but the # new pkg doesn't have the same file names. Fabulous huh?! my.conf.cache = False for oldpkg in my.pkgSack.searchFiles(just_fn): # ghostfiles are always bogons if just_fn in oldpkg.ghostlist: continue if my.rpmdb.installed(oldpkg.name): needing_restart.add(pid) found_match = True break if opts.services: names = set([get_service(pid) for pid in needing_restart]) for name in names: if name is not None: print name return 0 for pid in needing_restart: try: cmdline = open('/proc/' +pid+ '/cmdline', 'r').read() except (OSError, IOError), e: print >>sys.stderr, "Couldn't access process information for %s: %s" % (pid, str(e)) continue # proc cmdline is null-delimited so clean that up cmdline = cmdline.replace('\000', ' ') print '%s : %s' % (pid, cmdline) return 0 if __name__ == "__main__": try: sys.exit(main(sys.argv)) except RepoError, e: print >>sys.stderr, e sys.exit(1)