test/select/test12.c

   1 /*
   2  * Test name: test12.c
   3  *
   4  * Objective: The purpose of this check the behaviour when a signal is received
   5  * and there is a handler.
   6  *
   7  * Description: The program handles SIGHUP and expects the user to actually send
   8  * the signal from other terminal with 'kill -1 pid'
   9
  10  * Jose M. Gomez
  11  */
  12
  13 #include <sys/types.h>
  14 #include <sys/select.h>
  15 #include <unistd.h>
  16 #include <time.h>
  17 #include <stdio.h>
  18 #include <signal.h>
  19 #include <errno.h>
  20
  21 #define SECONDS 15
  22
  23 void catch_hup(int sig_num)
  24 {
  25         /* don't need to reset signal handler */
  26         printf("Received a SIGHUP, inside the handler now\n");
  27 }
  28
  29 int main(void) {
  30         int ret;                /* return value */
  31
  32         /* set the HUP sginal handler to 'catch_hup' */
  33         signal(SIGHUP, catch_hup);
  34         /* Get proc_id and print it */
  35         printf("Send a signal from other terminal with: kill -1 %d\n", getpid());
  36         printf("Blocking now on select...\n", SECONDS);
  37         ret = select(0, NULL, NULL, NULL, NULL);
  38         printf("Errno: %d\n", errno);
  39 }