Thread: using a signal handler to kill processes

I'm writing a program that needs to accept PID's of running processes (*NIX) from the command line. So the call to my program would look like

Code:

$ ./myprogram 1324 1328 1400

that part is all fine and dandy, using argc and argv... but then I have to generate a signal (SIGALRM) every second and use the function that handles the signal to send SIGINT to the processes. I'm not sure how to get the PID #'s into my kill function. This is what I've got so far, but I'm help up for the moment unless I can think of a better way to do it. My problem is that the signal function that handles the alarm doesn't let me pass arguments to the function that I want to call (I don't think) Anybody have a better idea of how to approach this? Thanks

Code:

#include <stdio.h>
#include <signal.h>
#include <sys/time.h>

void killer(int);
int set_timer(int);

int main(int argc, char* argv[])
{
  int n;  //will hold PID's passed in as arguments

  n = atoi(argv[i]); //need a loop or something here to get all of the args

  signal(SIGALRM, killer);
  set_timer(1);
  for ( ; ; );
  return 0;
}

int set_timer(int seconds)
{
  struct itimerval timer;

  timer.it_interval.tv_sec = seconds;
  timer.it_interval.tv_usec = 0;
  timer.it_value.tv_sec = seconds;
  timer.it_value.tv_usec = 0;

  return setitimer(ITIMER_REAL, &timer, NULL);
}

void killer(int signum)
{
  for( i = 1; i < ; ++i)
  {
    kill(n, SIGINT);
  }
  return 0;
}

I know that global variables are to be avoided, but...

Code:

# define MAX_PIDS 10
static int count = 0;
static int pids[MAX_PIDS];

int main() 
{
    /* Initialize pids array ... */

    return 0;
}

void killer(int signum)
{
  for( i = 1; i <count ; ++i)
  {
    kill(pids[i], SIGINT);
  }
  return 0;
}

ok. [sshhhh!] I did it with globals [/sshhhh!]

thnx.
dinjas