manual/examples/setjmp.c

   1 #include <setjmp.h>
   2 #include <stdlib.h>
   3 #include <stdio.h>
   4
   5 jmp_buf main_loop;
   6
   7 void
   8 abort_to_main_loop (int status)
   9 {
  10   longjmp (main_loop, status);
  11 }
  12
  13 int
  14 main (void)
  15 {
  16   while (1)
  17     if (setjmp (main_loop))
  18       puts ("Back at main loop....");
  19     else
  20       do_command ();
  21 }
  22
  23
  24 void
  25 do_command (void)
  26 {
  27   char buffer[128];
  28   if (fgets (buffer, 128, stdin) == NULL)
  29     abort_to_main_loop (-1);
  30   else
  31     exit (EXIT_SUCCESS);
  32 }