watch.c

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** PBX4Linux                                                                 **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** PBX Watchdog with debug function                                          **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <signal.h>
  16 #include <stdarg.h>
  17 #include <time.h>
  18 #include <sys/time.h>
  19 #include <sys/types.h>
  20 #include <unistd.h>
  21 #include "save.h"
  22
  23 time_t now;
  24 #define GET_NOW() \
  25         { \
  26                 now = time(&now); \
  27         }
  28
  29 int quit = 0;
  30
  31 void sighandler(int sigset)
  32 {
  33         if (sigset == SIGHUP)
  34                 return;
  35         if (sigset == SIGPIPE)
  36                 return;
  37         printf("Signal received: %d\n", sigset);
  38         quit = 1;
  39 }
  40
  41
  42 int main(int argc, char *argv[])
  43 {
  44         int debug = 0;
  45         int ret;
  46         char command[256], file[64] = "pbx";
  47
  48         printf("** PBX-Watch ***\n\n");
  49
  50         /* show options */
  51         if (argc <= 1)
  52         {
  53                 usage:
  54                 printf("\n");
  55                 printf("Usage: pbxwatch (run | debug) [fork]\n");
  56                 printf("run   = Starts PBX4Linux (pbx) and restart it on every crash.\n");
  57                 printf("debug = Starts PBX4Linux using debugger an restarts it on every crash.\n");
  58                 printf("        Log files and back trace are moved into a seperate directory.\n");
  59                 printf("fork  = Option to make pbxwatch running as daemon.\n");
  60                 printf("\n");
  61                 return(0);
  62         }
  63
  64         if (!(strcasecmp(argv[1],"run")))
  65                 debug = 0;
  66         else
  67         if (!(strcasecmp(argv[1],"debug")))
  68                 debug = 1;
  69         else
  70                 goto usage;
  71
  72         /* do fork */
  73         if (argc > 2)
  74         if (!(strcasecmp(argv[2],"fork")))
  75         {
  76                 /* do daemon fork */
  77                 pid_t pid;
  78
  79                 pid = fork();
  80
  81                 if (pid < 0)
  82                 {
  83                         fprintf(stderr, "Cannot fork!\n");
  84                         exit(EXIT_FAILURE);
  85                 }
  86                 if (pid != 0)
  87                 {
  88                         printf("PBX-Watch: Starting daemon.\n");
  89                         exit(0);
  90                 }
  91                 usleep(200000);
  92                 printf("\n");
  93         }
  94
  95         /* signal handlers */
  96         signal(SIGINT,sighandler);
  97         signal(SIGHUP,sighandler);
  98         signal(SIGTERM,sighandler);
  99         signal(SIGPIPE,sighandler);
 100
 101         while(42)
 102         {
 103                 /* RUN */
 104                 printf("*** RUNNING PBX4LINUX ***\n");
 105                 if (debug)
 106                 {
 107                         /* write debugger batch list */
 108                         SPRINT(command, "echo > /tmp/pbxwatch.batch -e \"handle SIGPIPE nostop\\\\nfile %s\\\\nrun start\\\\nbt\\\\n\"", file);
 109                         system(command);
 110                         SPRINT(command, "gdb --quiet --batch -x \"/tmp/pbxwatch.batch\" 2>&1 | tee %s/crashreport", INSTALL_DATA);
 111                         printf("*** DEBUGGER STARTED ***\n");
 112                         ret = system(command);
 113                         printf("*** DEBUGGER FINISHED ***\n");
 114                 } else
 115                 {
 116                         SCPY(command, file);
 117                         ret = system(command);
 118                         if (ret != 11)
 119                         {
 120                                 printf("*** PBX4LINUX exitted with return code %d ***\n", ret);
 121                                 break;
 122                         }
 123                         printf("*** PBX4LINUX CRASHED ***\n");
 124                 }
 125
 126                 /* LOG */
 127                 printf("*** WRITING LOG  ***\n");
 128                 GET_NOW();
 129                 SPRINT(command, "mkdir \"%s/%d\" && mv \"%s/crashreport\" \"%s/%d\" && cp -a \"%s/debug*.log\" \"%s/%d\"\n", INSTALL_DATA, now, INSTALL_DATA, INSTALL_DATA, now, INSTALL_DATA, INSTALL_DATA, now);
 130                 system(command);
 131
 132                 /* DELAY */
 133                 printf("*** SLEEPING 10 SECONDS UNTIL RESTART ***\n");
 134                 sleep(10);
 135                 if (quit)
 136                         break;
 137         }
 138
 139         signal(SIGINT,SIG_DFL);
 140         signal(SIGHUP,SIG_DFL);
 141         signal(SIGTERM,SIG_DFL);
 142         signal(SIGPIPE,SIG_DFL);
 143
 144         return(0);
 145 }
 146
 147