/* CpSc 824

   Sample program demonstrating how to "catch" an alarm timeout.

*/

#include <sys/time.h>
#include <signal.h>


/* Global flag set when timeout occurs */
int timeOutFlag = 0;

/* Function called with alarm signal occurs */
void time_limit(int signalCode) {
    printf("The process has exceeded the time limit\n");
    timeOutFlag = 1;
    return;
}


main (int argc, char *argv[]) {
    /* This process should end gracefully in 30 seconds */
    alarm(30);

    /* Set time_limit() as the procedure to invoke when the timeout 
       occurs */
    signal(SIGALRM, time_limit);

    /* Loop waiting for the timeout */
    while (!timeOutFlag) {
       printf("Waiting for timeout\n");
       sleep(5);
    }
    printf("Loop broken by timeout\n");

}