Source code

#include <stdio.h>
#include <string.h>
#include <err.h>
#include <kvm.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <sys/param.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sysexits.h>

static int get_pid_of_process(char *process_name)
{
  static kvm_t *kd = NULL;
  struct kinfo_proc *p;
  int i, n_processes, processes_found;

  processes_found = 0;
   
  if ((kd = kvm_open("/dev/null", "/dev/null", "/dev/null", O_RDONLY, "kvm_open")) == NULL)
  (void)errx(1, "%s", kvm_geterr(kd));
  else {
  p = kvm_getprocs(kd, KERN_PROC_PROC, 0, &n_processes);
  for (i = 0; i<n_processes; i++)
  if ((strncmp(process_name, p[i].ki_comm, COMMLEN+1) == 0) && (getpid() != (int)p[i].ki_pid)) {

  processes_found = (int)p[i].ki_pid;
  }

  kvm_close(kd);
  }  

  return processes_found;
}