lab/lab5/sleep.c

   1 #include <stdlib.h>
   2 #include <unistd.h>
   3 #include <stdio.h>
   4 #include <signal.h>
   5
   6 void request_denied() {
   7
   8         printf("no\n");
   9         signal(SIGTSTP, request_denied);
  10 }
  11
  12 int main(int argc, char *argv[]) {
  13
  14         int seconds_left;
  15
  16         signal(SIGTSTP, request_denied);
  17
  18         seconds_left = sleep(5);
  19
  20         while(seconds_left != 0)
  21                 seconds_left = sleep(seconds_left);
  22
  23
  24
  25         return 0;
  26 }