core/main.c

   1 #include "../lib/sstring.h"
   2 #include "../lib/valgrind.h"
   3 #include "events.h"
   4 #include "schedule.h"
   5 #include "hooks.h"
   6 #include "modules.h"
   7 #include "config.h"
   8 #include "error.h"
   9 #include "nsmalloc.h"
  10
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include <time.h>
  15 #include <sys/time.h>
  16 #include <sys/stat.h>
  17 #include <sys/types.h>
  18 #include <errno.h>
  19 #include <signal.h>
  20 #include <unistd.h>
  21
  22 void initseed();
  23 void init_logfile();
  24 void fini_logfile();
  25 void siginthandler(int sig);
  26 void sigusr1handler(int sig);
  27 void sigsegvhandler(int sig);
  28 void sighuphandler(int sig);
  29 void handlecore(void);
  30 void handlesignals(void);
  31
  32 int newserv_shutdown_pending;
  33 static int newserv_sigint_pending, newserv_sigusr1_pending, newserv_sighup_pending;
  34 static void (*oldsegv)(int);
  35
  36 int main(int argc, char **argv) {
  37   char *config = "newserv.conf";
  38
  39   nsinit();
  40
  41   initseed();
  42   inithooks();
  43   inithandlers();
  44   initschedule();
  45
  46   init_logfile();
  47
  48   if (argc>1) {
  49     if (strcmp(argv[1], "--help")==0) {
  50       printf("Syntax: %s [config]\n", argv[0]);
  51       puts("");
  52       printf("Default configuration file unless specified: %s\n", config);
  53
  54       return 0;
  55     }
  56
  57     config = argv[1];
  58   }
  59
  60   initconfig(config);
  61
  62   /* modules can rely on this directory always being there */
  63   if (mkdir("data", 0700) < 0 && errno != EEXIST) {
  64     perror("mkdir");
  65     return 1;
  66   }
  67
  68   /* Loading the modules will bring in the bulk of the code */
  69   initmodules();
  70   signal(SIGINT, siginthandler);
  71   signal(SIGUSR1, sigusr1handler);
  72   signal(SIGHUP, sighuphandler);
  73   oldsegv = signal(SIGSEGV, sigsegvhandler);
  74
  75   /* Main loop */
  76   for(;;) {
  77     handleevents(10);
  78     doscheduledevents(time(NULL));
  79
  80     if (newserv_shutdown_pending) {
  81       newserv_shutdown();
  82       break;
  83     }
  84
  85     handlesignals();
  86   }
  87
  88   freeconfig();
  89
  90   fini_logfile();
  91   finischedule();
  92   finihandlers();
  93
  94   nsexit();
  95
  96   if (RUNNING_ON_VALGRIND) {
  97     /* We've already manually called _fini for each of the modules. Make sure
  98      * it's not getting called again when the libraries are unloaded. */
  99     _exit(0);
 100   }
 101
 102   return 0;
 103 }
 104
 105 void handlesignals(void) {
 106   if (newserv_sigusr1_pending) {
 107     signal(SIGUSR1, sigusr1handler);
 108     Error("core", ERR_INFO, "SIGUSR1 received.");
 109     triggerhook(HOOK_CORE_SIGUSR1, NULL);
 110     newserv_sigusr1_pending=0;
 111    }
 112
 113   if (newserv_sighup_pending) {
 114     signal(SIGHUP, sighuphandler);
 115     Error("core", ERR_INFO, "SIGHUP received, rehashing...");
 116     triggerhook(HOOK_CORE_REHASH, (void *)1);
 117     newserv_sighup_pending=0;
 118   }
 119
 120   if (newserv_sigint_pending) {
 121     Error("core", ERR_INFO, "SIGINT received, terminating.");
 122     triggerhook(HOOK_CORE_SIGINT, NULL);
 123     newserv_sigint_pending=0;
 124     newserv_shutdown_pending=1;
 125   }
 126 }
 127
 128 /*
 129  * seed the pseudo-random number generator, rand()
 130  */
 131 void initseed() {
 132   struct timeval t;
 133
 134   gettimeofday(&t, NULL);
 135   srand(t.tv_usec);
 136 }
 137
 138 void siginthandler(int sig) {
 139   newserv_sigint_pending = 1;
 140 }
 141
 142 void sigusr1handler(int sig) {
 143   newserv_sigusr1_pending = 1;
 144 }
 145
 146 void sighuphandler(int sig) {
 147   newserv_sighup_pending = 1;
 148 }
 149
 150 void sigsegvhandler(int sig) {
 151   handlecore();
 152
 153   oldsegv(sig);
 154 }