#include <errno.h>              /* for errno() */
#include <signal.h>             /* for signal(), SIG* */
#include <stdio.h>              /* for sprintf(), stderr, ... */
#include <stdlib.h>             /* for exit() */
#include <string.h>             /* for strerror() */
#include <unistd.h>             /* for sleep() */
#include "funcs.h"              /* for infomsg(), errormsg() */

/*
 *  Macros
 */

#define A_LONG_TIME             3600
#define TIMEOUT                 5

/*
 *  Type and struct definitions
 */

/*
 *  Global variables
 */

/*
 *  Forward declarations
 */

void sigalrm_handler(int);

/*
 *  Functions
 */

int main(
int argc,
char *argv[])
{
    int rc;

    /*
     *  Initialise.
     */

    infomsg("setting up signal handlers ...");
    signal(SIGALRM, sigalrm_handler);

    /*
     *  Schedule timeout alarm.
     */

    infomsg("scheduling timeout alarm ...");
    alarm(TIMEOUT);

    /*
     *  Start sleep.
     */

    infomsg("before calling sleep()");
    rc = sleep(A_LONG_TIME);
    infomsg("after calling sleep()");
    if (rc != 0)
        infomsg("sleep() returned early due to: %s", strerror(errno));

    /*
     *  Clean up and exit.
     */

    infomsg("cleaning up and exiting ...");
    signal(SIGALRM, SIG_DFL);
    return(0);
}

void sigalrm_handler(
int sig)
{
    infomsg("received SIGALRM");
}