core/error.c

   1 /* error.c */
   2
   3 #include <stdarg.h>
   4 #include <time.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include "error.h"
   8 #include "hooks.h"
   9
  10 FILE *logfile;
  11
  12 static corehandler *coreh, *coret;
  13
  14 char *sevtostring(int severity) {
  15   switch(severity) {
  16     case ERR_DEBUG:
  17       return "debug";
  18
  19     case ERR_INFO:
  20       return "info";
  21
  22     case ERR_WARNING:
  23       return "warning";
  24
  25     case ERR_ERROR:
  26       return "error";
  27
  28     case ERR_FATAL:
  29       return "fatal error";
  30
  31     case ERR_STOP:
  32       return "terminal error";
  33
  34     default:
  35       return "unknown error";
  36   }
  37 }
  38
  39 void reopen_logfile(int hooknum, void *arg) {
  40   if (logfile)
  41     fclose(logfile);
  42
  43   logfile=fopen("logs/newserv.log","a");
  44 }
  45
  46 void init_logfile() {
  47   logfile=fopen("logs/newserv.log","a");
  48   registerhook(HOOK_CORE_SIGUSR1, reopen_logfile);
  49 }
  50
  51 void Error(char *source, int severity, char *reason, ... ) {
  52   char buf[512];
  53   va_list va;
  54   struct tm *tm;
  55   time_t now;
  56   char timebuf[100];
  57   struct error_event evt;
  58
  59   va_start(va,reason);
  60   vsnprintf(buf,512,reason,va);
  61   va_end(va);
  62
  63   evt.severity=severity;
  64   evt.message=buf;
  65   evt.source=source;
  66   triggerhook(HOOK_CORE_ERROR, &evt);
  67
  68   if (severity>ERR_DEBUG) {
  69     now=time(NULL);
  70     tm=gmtime(&now);
  71     strftime(timebuf,100,"%Y-%m-%d %H:%M:%S",tm);
  72     fprintf(stderr,"[%s] %s(%s): %s\n",timebuf,sevtostring(severity),source,buf);
  73     if (logfile)
  74       fprintf(logfile,"[%s] %s(%s): %s\n",timebuf,sevtostring(severity),source,buf);
  75   }
  76
  77   if (severity>=ERR_STOP) {
  78     fprintf(stderr,"Terminal error occured, exiting...\n");
  79     triggerhook(HOOK_CORE_STOPERROR, NULL);
  80     exit(0);
  81   }
  82 }
  83
  84 void handlecore(void) {
  85   corehandler *n;
  86
  87   /* no attempt is made to clean these up */
  88   for(n=coreh;coreh;n=coreh->next)
  89     (n->fn)(n->arg);
  90 }
  91
  92 corehandler *registercorehandler(CoreHandlerFn fn, void *arg) {
  93   corehandler *c = (corehandler *)malloc(sizeof(corehandler));
  94   /* core if we can't allocate!! */
  95
  96   c->fn = fn;
  97   c->arg = arg;
  98   c->next = NULL;
  99   c->prev = coret;
 100   coret = c->prev;
 101
 102   if(!coreh)
 103     coreh = c;
 104
 105   return c;
 106 }
 107
 108 void deregistercorehandler(corehandler *c) {
 109   if(!c->prev) {
 110     coreh = c->next;
 111   } else {
 112     c->prev->next = c->next;
 113   }
 114
 115   if(!c->next) {
 116     coret = c->prev;
 117   } else {
 118     c->next->prev = c->prev;
 119   }
 120
 121   free(c);
 122 }
 123