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From: Rainer Weikusat <rweikusat@mssgmbh.com>
Newsgroups: comp.os.linux.development.system
Subject: Re: Linux c alarm signal cannot receive
Date: Tue, 07 Feb 2012 16:56:00 +0000
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knightmare <knightmare1980@gmail.com> writes:
> no "get signal" printed....why
> #include <stdio.h>
> #include <stdlib.h>
> #include <signal.h>
> #include <time.h>
> #include <strings.h>
> #include <unistd.h>
>
> void alarmhandler(int signum){
>         printf("get signal %d\n",signum);
> }
> int main() {
>   struct sigaction sa;
>   bzero(&sa, sizeof sa);
>   sa.sa_handler = alarmhandler;
>   sigaction(SIGINT, &sa, 0);
>   if(sigaction(SIGALRM, &sa, 0)==0){
>     printf("success\n");
>   }
>   alarm(2);
>   for(;;);
> }

Works for me.