In a VMS program I am using a timer function to call other function repeatedly .the syntax for the timer function is -:


set_timer(atoi(translate_logical("lnm$group","BACKUP_INTVAL",WARNING)),backup_data,0,FATAl);


where the backup_data is the function to be called repeatedly
Now I have to change this code as per linux programming in C.


atleast send a useful timer code to implement in linux for calling the functins repeatedly.
please help me out .I need it urgently

check:
http://www.dilnetpc.com/mht-dp04.pdf


---------------------------------------------------------------------
// timertst1.c: Simple timer demo program. Use cross-gcc .
// Vers. 1.00 - 21.Oct. 2002
// k.d.walter@t-online.de
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <sys/time.h>
// This is a timer handler.
void timerHandler (int signum)
{
static int counter= 0;
printf ("timerHandler: counter= %d\n", counter++);
fflush (stdout);
}
// This is the one and only main function.
int main (void)
{
struct sigaction sa;
struct itimerval timer;
// Install the timer handler...
memset (&sa, 0, sizeof (sa));
sa.sa_handler= &timerHandler;
sigaction (SIGALRM, &sa, NULL);
// Configure the timer to expire every 100 msec...
timer.it_value.tv_sec= 0; // First timeout
timer.it_value.tv_usec= 100000;
timer.it_interval.tv_sec= 0; // Interval
timer.it_interval.tv_usec= 100000;
// Start timer...
setitimer (ITIMER_REAL, &timer, NULL);
// Do noting...
while (1)
sleep (10);
}