tools/testing/selftests/livepatch/test_klp-call_getpid.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2023 SUSE
   4  * Authors: Libor Pechacek <lpechacek@suse.cz>
   5  *          Marcos Paulo de Souza <mpdesouza@suse.com>
   6  */
   7
   8 #include <stdio.h>
   9 #include <unistd.h>
  10 #include <sys/syscall.h>
  11 #include <sys/types.h>
  12 #include <signal.h>
  13
  14 static int stop;
  15 static int sig_int;
  16
  17 void hup_handler(int signum)
  18 {
  19         stop = 1;
  20 }
  21
  22 void int_handler(int signum)
  23 {
  24         stop = 1;
  25         sig_int = 1;
  26 }
  27
  28 int main(int argc, char *argv[])
  29 {
  30         long count = 0;
  31
  32         signal(SIGHUP, &hup_handler);
  33         signal(SIGINT, &int_handler);
  34
  35         while (!stop) {
  36                 (void)syscall(SYS_getpid);
  37                 count++;
  38         }
  39
  40         if (sig_int)
  41                 printf("%ld iterations done\n", count);
  42
  43         return 0;
  44 }