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#include <stdio.h>
#include <signal.h>
int alarmFlag = 0; /* Global alarm flag */
void alarmHandler (); /* Forward declaration of alarm handler */
/***************************************************************/
main ()
{
signal (SIGALRM, alarmHandler); /* Install signal handler */
alarm (3); /* Schedule an alarm signal in three seconds */
printf ("Looping...\n");
while (!alarmFlag) /* Loop until flag set */
{
pause (); /* Wait for a signal */
}
printf ("Loop ends due to alarm signal\n");
}
/***************************************************************/
void alarmHandler ()
{
printf ("An alarm clock signal was received\n");
alarmFlag = 1;
}