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 fini_logfile() {
  52   deregisterhook(HOOK_CORE_SIGUSR1, reopen_logfile);
  53   fclose(logfile);
  54 }
  55
  56 void Error(char *source, int severity, char *reason, ... ) {
  57   char buf[512];
  58   va_list va;
  59   struct tm *tm;
  60   time_t now;
  61   char timebuf[100];
  62   struct error_event evt;
  63
  64   va_start(va,reason);
  65   vsnprintf(buf,512,reason,va);
  66   va_end(va);
  67
  68   evt.severity=severity;
  69   evt.message=buf;
  70   evt.source=source;
  71   triggerhook(HOOK_CORE_ERROR, &evt);
  72
  73   if (severity>ERR_DEBUG) {
  74     now=time(NULL);
  75     tm=gmtime(&now);
  76     strftime(timebuf,100,"%Y-%m-%d %H:%M:%S",tm);
  77     fprintf(stderr,"[%s] %s(%s): %s\n",timebuf,sevtostring(severity),source,buf);
  78     if (logfile)
  79       fprintf(logfile,"[%s] %s(%s): %s\n",timebuf,sevtostring(severity),source,buf);
  80   }
  81
  82   if (severity>=ERR_STOP) {
  83     fprintf(stderr,"Terminal error occured, exiting...\n");
  84     triggerhook(HOOK_CORE_STOPERROR, NULL);
  85     exit(0);
  86   }
  87 }
  88
  89 void handlecore(void) {
  90   corehandler *n;
  91
  92   /* no attempt is made to clean these up */
  93   for(n=coreh;coreh;n=coreh->next)
  94     (n->fn)(n->arg);
  95 }
  96
  97 corehandler *registercorehandler(CoreHandlerFn fn, void *arg) {
  98   corehandler *c = (corehandler *)malloc(sizeof(corehandler));
  99   /* core if we can't allocate!! */
 100
 101   c->fn = fn;
 102   c->arg = arg;
 103   c->next = NULL;
 104   c->prev = coret;
 105   coret = c->prev;
 106
 107   if(!coreh)
 108     coreh = c;
 109
 110   return c;
 111 }
 112
 113 void deregistercorehandler(corehandler *c) {
 114   if(!c->prev) {
 115     coreh = c->next;
 116   } else {
 117     c->prev->next = c->next;
 118   }
 119
 120   if(!c->next) {
 121     coret = c->prev;
 122   } else {
 123     c->next->prev = c->prev;
 124   }
 125
 126   free(c);
 127 }
 128