.bin/gentoo-check-services

   1 #!/usr/bin/python
   2 # -*- coding: utf-8 -*-
   3
   4 """Script for restarting services that refer to old/deleted libs."""
   5
   6 from __future__ import print_function
   7
   8 import argparse
   9 import glob
  10 import os
  11 import signal
  12 import sys
  13 import time
  14
  15
  16 # Set of paths that are "OK" and safe to ignore.
  17 IGNORE_PATHS = set((
  18         '/dev/zero',
  19         '/etc/ld.so.cache',
  20         '/usr/share/icons/Adwaita/icon-theme.cache',
  21         '/usr/share/icons/gnome/icon-theme.cache',
  22         '/usr/share/icons/hicolor/icon-theme.cache',
  23         '/usr/share/mime/mime.cache',
  24 ))
  25
  26
  27 def find_svcs():
  28         """Find all programs w/deleted paths."""
  29         svcs = {}
  30         for pid in os.listdir('/proc'):
  31                 try:
  32                         pid_nr = int(pid)
  33                 except ValueError:
  34                         continue
  35
  36                 map = '/proc/%s/maps' % pid
  37                 if not os.path.exists(map):
  38                         print('skipping %s' % pid)
  39                         continue
  40
  41                 old_paths = set()
  42                 for line in open(map):
  43                         if not line.endswith(' (deleted)\n'):
  44                                 continue
  45                         # b71c7000-b7307000 rw-s 00000000 00:04 17024337   /dev/zero (deleted)
  46                         addr, perm, offset, dev, inode, path = line.split(' ', 5)
  47                         # Handle paths with spaces.
  48                         path = path.lstrip().rsplit(' ', 2)[0]
  49                         if (path == '/[aio]' or
  50                             path.startswith('/memfd:') or
  51                             path.startswith('/SYSV') or
  52                             path.startswith('/dev/shm/') or
  53                             path.startswith('/tmp/')):
  54                                 continue
  55                         old_paths.add(path)
  56
  57                 old_paths -= IGNORE_PATHS
  58                 if not old_paths:
  59                         continue
  60
  61                 cmdline = open('/proc/%s/cmdline' % pid).read().split('\0')
  62                 try:
  63                         while True:
  64                                 cmdline.remove('')
  65                 except ValueError:
  66                         pass
  67                 svcs[pid_nr] = {
  68                         'cmdline': cmdline,
  69                         'old_paths': old_paths,
  70                 }
  71         return svcs
  72
  73
  74 # Mapping of known programs to their init.d scripts.
  75 SERVICES = {
  76         '/usr/sbin/acpid': 'acpid',
  77         '/usr/sbin/apache2': 'apache2',
  78         '/usr/sbin/atd': 'atd',
  79         '/usr/sbin/bacula-fd': 'bacula-fd',
  80         '/usr/sbin/cron': 'vixie-cron',
  81         '/usr/sbin/crond': 'dcron',
  82         '/usr/sbin/ntpd': 'ntpd',
  83         '/usr/sbin/snmpd': 'snmpd',
  84         '/usr/sbin/sshd': 'sshd',
  85         '/usr/sbin/syslog-ng': 'syslog-ng',
  86         '/usr/sbin/xinetd': 'xinetd',
  87         '/usr/bin/daisydog': 'daisydog',
  88         '/usr/bin/distccd': 'distccd',
  89         '/usr/bin/monit': 'monit',
  90         '/usr/bin/rsync': 'rsyncd',
  91         '/usr/bin/stunnel': 'stunnel',
  92         '/usr/bin/tor': 'tor',
  93         '/usr/bin/transmission-daemon': 'transmission-daemon',
  94         '/usr/bin/mediatomb': 'mediatomb',
  95         '/lib/systemd/systemd-udevd': 'udev',
  96         '/usr/libexec/nrpe': 'nrpe',
  97         '//usr/libexec/postfix/master': 'postfix',
  98         'denyhosts.py': 'denyhosts',
  99         'dropbear': 'dropbear',
 100         'galileo': 'galileo',
 101         'tlsdated': 'tlsdated',
 102 }
 103 def auto_restart(opts, svcs):
 104         kill = set()
 105         restart = set()
 106         for pid, svc in svcs.items():
 107                 if svc['cmdline'][0] == '/sbin/agetty':
 108                         kill.add(pid)
 109                 elif 'postgres:' in svc['cmdline'][0]:
 110                         p = os.path.basename(glob.glob('/etc/runlevels/default/postgresql-*')[0])
 111                         restart.add(p)
 112                 elif svc['cmdline'][0].startswith('metalog'):
 113                         restart.add('metalog')
 114                 else:
 115                         prog = svc['cmdline'][0]
 116                         if prog.startswith('/usr/bin/python'):
 117                                 prog = os.path.basename(svc['cmdline'][1])
 118
 119                         init = SERVICES.get(prog)
 120                         if init:
 121                                 restart.add(init)
 122
 123         if kill or restart:
 124                 for pid in kill:
 125                         print('killing %s (%s)' % (pid, svcs[pid]['cmdline'][0]))
 126                         if not opts.dryrun:
 127                                 os.kill(pid, signal.SIGTERM)
 128                 for init in restart:
 129                         print('restarting %s' % init)
 130                         if not opts.dryrun:
 131                                 os.system('/etc/init.d/%s -q restart' % init)
 132
 133                 if not opts.dryrun:
 134                         time.sleep(1)
 135                         svcs = find_svcs()
 136
 137         return svcs
 138
 139
 140 def summarize(svcs):
 141         print()
 142         sslh = False
 143         for pid in svcs.keys():
 144                 if svcs[pid]['cmdline'][0] == '/usr/sbin/sslh':
 145                         del svcs[pid]
 146                         sslh = True
 147         if sslh:
 148                 print('sslh needs restart')
 149
 150         print()
 151         for pid, svc in svcs.items():
 152                 print(pid, svc['cmdline'])
 153                 print('\t%s' % '\n\t'.join(svc['old_paths']))
 154
 155
 156 def get_parser():
 157         parser = argparse.ArgumentParser(description=__doc__)
 158         parser.add_argument('-n', '--dry-run', dest='dryrun', action='store_true',
 159                             help='Show what would be restarted (and why)')
 160         return parser
 161
 162
 163 def main(argv):
 164         parser = get_parser()
 165         opts = parser.parse_args(argv)
 166
 167         svcs = find_svcs()
 168         svcs = auto_restart(opts, svcs)
 169         summarize(svcs)
 170
 171
 172 if __name__ == '__main__':
 173         exit(main(sys.argv[1:]))