mdw@git.distorted.org.uk Git - disorder/blob - server/deadlock.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2005 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20
  21 #include <config.h>
  22 #include "types.h"
  23
  24 #include <getopt.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <db.h>
  28 #include <locale.h>
  29 #include <errno.h>
  30 #include <sys/types.h>
  31 #include <unistd.h>
  32 #include <pcre.h>
  33 #include <string.h>
  34 #include <syslog.h>
  35
  36 #include "configuration.h"
  37 #include "syscalls.h"
  38 #include "log.h"
  39 #include "defs.h"
  40 #include "mem.h"
  41 #include "kvp.h"
  42 #include "trackdb.h"
  43 #include "trackdb-int.h"
  44
  45 static const struct option options[] = {
  46   { "help", no_argument, 0, 'h' },
  47   { "version", no_argument, 0, 'V' },
  48   { "config", required_argument, 0, 'c' },
  49   { "debug", no_argument, 0, 'd' },
  50   { "no-debug", no_argument, 0, 'D' },
  51   { "syslog", no_argument, 0, 's' },
  52   { "no-syslog", no_argument, 0, 'S' },
  53   { 0, 0, 0, 0 }
  54 };
  55
  56 /* display usage message and terminate */
  57 static void help(void) {
  58   xprintf("Usage:\n"
  59           "  disorder-deadlock [OPTIONS]\n"
  60           "Options:\n"
  61           "  --help, -h              Display usage message\n"
  62           "  --version, -V           Display version number\n"
  63           "  --config PATH, -c PATH  Set configuration file\n"
  64           "  --debug, -d             Turn on debugging\n"
  65           "  --[no-]syslog           Force logging\n"
  66           "\n"
  67           "Deadlock manager for DisOrder.  Not intended to be run\n"
  68           "directly.\n");
  69   xfclose(stdout);
  70   exit(0);
  71 }
  72
  73 /* display version number and terminate */
  74 static void version(void) {
  75   xprintf("disorder-deadlock version %s\n", disorder_version_string);
  76   xfclose(stdout);
  77   exit(0);
  78 }
  79
  80 int main(int argc, char **argv) {
  81   int n, err, aborted, logsyslog = !isatty(2);
  82
  83   set_progname(argv);
  84   if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
  85   while((n = getopt_long(argc, argv, "hVc:dDSs", options, 0)) >= 0) {
  86     switch(n) {
  87     case 'h': help();
  88     case 'V': version();
  89     case 'c': configfile = optarg; break;
  90     case 'd': debugging = 1; break;
  91     case 'D': debugging = 0; break;
  92     case 'S': logsyslog = 0; break;
  93     case 's': logsyslog = 1; break;
  94     default: fatal(0, "invalid option");
  95     }
  96   }
  97   if(logsyslog) {
  98     openlog(progname, LOG_PID, LOG_DAEMON);
  99     log_default = &log_syslog;
 100   }
 101   if(config_read(0)) fatal(0, "cannot read configuration");
 102   info("started");
 103   trackdb_init(TRACKDB_NO_RECOVER);
 104   while(getppid() != 1) {
 105     if((err = trackdb_env->lock_detect(trackdb_env,
 106                                        0,
 107                                        DB_LOCK_DEFAULT,
 108                                        &aborted)))
 109       fatal(0, "trackdb_env->lock_detect: %s", db_strerror(err));
 110     if(aborted)
 111       D(("aborted %d lock requests", aborted));
 112     sleep(1);
 113   }
 114   /* if our parent goes away, it's time to stop */
 115   info("stopped (parent terminated)");
 116   return 0;
 117 }
 118
 119 /*
 120 Local Variables:
 121 c-basic-offset:2
 122 comment-column:40
 123 fill-column:79
 124 indent-tabs-mode:nil
 125 End:
 126 */