#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, char *argv[])
{
  int n = atoi(argv[1]);

  while ( n-- ) {
    open("/dev/ptmx", O_RDWR);
  }

  for(;;)
    pause();
}