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   if (!logfile) {
  49     fprintf(stderr,"Failed to open logfile...\n");
  50   }
  51   registerhook(HOOK_CORE_SIGUSR1, reopen_logfile);
  52 }
  53
  54 void fini_logfile() {
  55   deregisterhook(HOOK_CORE_SIGUSR1, reopen_logfile);
  56   if (logfile)
  57     fclose(logfile);
  58 }
  59
  60 void Error(char *source, int severity, char *reason, ... ) {
  61   char buf[512];
  62   va_list va;
  63   struct tm *tm;
  64   time_t now;
  65   char timebuf[100];
  66   struct error_event evt;
  67
  68   va_start(va,reason);
  69   vsnprintf(buf,512,reason,va);
  70   va_end(va);
  71
  72   evt.severity=severity;
  73   evt.message=buf;
  74   evt.source=source;
  75   triggerhook(HOOK_CORE_ERROR, &evt);
  76
  77   if (severity>ERR_DEBUG) {
  78     now=time(NULL);
  79     tm=gmtime(&now);
  80     strftime(timebuf,100,"%Y-%m-%d %H:%M:%S",tm);
  81     fprintf(stderr,"[%s] %s(%s): %s\n",timebuf,sevtostring(severity),source,buf);
  82     fflush(stderr);
  83
  84     if (logfile)  {
  85       fprintf(logfile,"[%s] %s(%s): %s\n",timebuf,sevtostring(severity),source,buf);
  86       fflush(logfile);
  87     }
  88   }
  89
  90   if (severity>=ERR_STOP) {
  91     fprintf(stderr,"Terminal error occured, exiting...\n");
  92     triggerhook(HOOK_CORE_STOPERROR, NULL);
  93     exit(0);
  94   }
  95 }
  96
  97 void handlecore(void) {
  98   corehandler *n;
  99
 100   /* no attempt is made to clean these up */
 101   for(n=coreh;coreh;n=coreh->next)
 102     (n->fn)(n->arg);
 103 }
 104
 105 corehandler *registercorehandler(CoreHandlerFn fn, void *arg) {
 106   corehandler *c = (corehandler *)malloc(sizeof(corehandler));
 107   /* core if we can't allocate!! */
 108
 109   c->fn = fn;
 110   c->arg = arg;
 111   c->next = NULL;
 112   c->prev = coret;
 113   coret = c->prev;
 114
 115   if(!coreh)
 116     coreh = c;
 117
 118   return c;
 119 }
 120
 121 void deregistercorehandler(corehandler *c) {
 122   if(!c->prev) {
 123     coreh = c->next;
 124   } else {
 125     c->prev->next = c->next;
 126   }
 127
 128   if(!c->next) {
 129     coret = c->prev;
 130   } else {
 131     c->next->prev = c->prev;
 132   }
 133
 134   free(c);
 135 }
 136