lib/syslib/panic.c

   1 #include <stdlib.h>
   2 #include <signal.h>
   3 #include <minix/sysutil.h>
   4
   5 #include "syslib.h"
   6
   7 int panicing= 0;
   8
   9 /*===========================================================================*
  10  *                              panic                                        *
  11  *===========================================================================*/
  12 PUBLIC void panic(who, mess, num)
  13 char *who;                      /* server identification */
  14 char *mess;                     /* message format string */
  15 int num;                        /* number to go with format string */
  16 {
  17 /* Something awful has happened. Panics are caused when an internal
  18  * inconsistency is detected, e.g., a programming error or illegal
  19  * value of a defined constant.
  20  */
  21   message m;
  22   void (*suicide)(void);
  23
  24   panicing= 1;
  25   if (NULL != who && NULL != mess) {
  26       if (num != NO_NUM) {
  27           printf("Panic in %s: %s: %d\n", who, mess, num);
  28       } else {
  29           printf("Panic in %s: %s\n", who, mess);
  30       }
  31   }
  32
  33   /* Try exit */
  34   _exit(1);
  35
  36   /* Try to signal ourself */
  37   abort();
  38
  39   /* If exiting nicely through PM fails for some reason, try to
  40    * commit suicide. E.g., message to PM might fail due to deadlock.
  41    */
  42   printf("panic: trying exception\n");
  43   suicide = (void (*)(void)) -1;
  44   suicide();
  45
  46   /* If committing suicide fails for some reason, hang. */
  47   printf("panic: for ever and ever\n");
  48   for(;;) { }
  49 }
  50