#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>

int main(int argc, char **argv)
{
  struct rlimit lim;

  /* Make sure we are called with enought arguments */
  if (argc < 2) {
    setuid(getuid());
    fprintf(stderr,"Usage: %s limit program [arguments...]\n"
	    	"	Sets the RLIM_NOFILES limit and starts the supplied"
		" program\n",
		argv[0]);
    exit(1);
  }

  /* Set the new MAX open files limit */
  lim.rlim_cur = lim.rlim_max = atoi(argv[1]);
  if (setrlimit(RLIMIT_NOFILE, &lim) != 0) {
    setuid(getuid());
    perror("setrlimit");
    exit(1);
  }

  /* Drop SUID privilegies */
  setuid(getuid());

  /* Start the wanted program */
  execvp(argv[2],argv+2);

  perror("exec failed");
  exit(1);
}