Ther are two process in my program and i want both to constantly running. So i have written the following code. But one of this process which is calling function wsJobCheck() is getting terminated with giving message : Program exited normally.

Can any one suggest why this is happing.
Code :

#include"listen_to_ms.h"
#include"job_header.h"  /*all headers files are included in this header file*/
#include"ws_job_check.h"

extern void callWSJobCheck(int);
int main()
{

    /* declaration */
    pid_t childpid;
    int j=0;
    struct passwd *pwd;
   
   
    /* creating a new child process */
    childpid=fork();
    if(childpid==0)
    {
        /* crete processes for listening to WS */
        listenToMS();
        exit(0);
    }

    if(signal(SIGALRM,callWSJobCheck)==SIG_ERR)
    {
        fprintf(stderr, "\nIN MAIN FUNCTION       :     Error in SIGALRM\n");
    }
    else
    {
        alarm(20);
    }


    return 0;
}


void callWSJobCheck(int signal)
{
    wsJobCheck();
    alarm(10);
    printf("\nIN MAIN FUNCTION       :     signal : %d",signal);
}

alarm() does not wait for anything. It schedules a SIGALRM in the future, but doesn't wait -- so your program sets the handler, schedules the alarm for 20 seconds in the future, then merrily continues on it's way to the return(0); and quits before the alarm even happens. See pause() if you want your process to wait for a signal such as an alarm.