gistfile1.txt

#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/resource.h>
#include <time.h>

int main(int argc, char* argv[]) {
  struct rlimit lim;
  int ret = getrlimit(RLIMIT_NOFILE, &lim);
  if (ret == -1) {
    perror("getrlimit");
    return 1;
  }
  srand(time(NULL));
  lim.rlim_cur = (rand() % 100) + 1;
  printf("Setting RLIMIT_NOFILE soft limit to %lu\n", lim.rlim_cur);
  ret = setrlimit(RLIMIT_NOFILE, &lim);
  if (ret == -1) {
    perror("setrlimit");
    return 1;
  }

  int i;
  for (i = 0;; i++) {
    ret = open("/dev/null", O_RDONLY);
    if (ret == -1) {
      perror("open");
      break;
    }
  }

  printf("Opened %d fds\n", i);
  return 0;
}