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