#define _BSD_SOURCE

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>

void handler(int s) { fprintf(stderr,"signal %d received!\n",s); }

int main(int argc, char* argv[])
{
  printf("pid = %d\n", getpid());
  signal(SIGINT, handler);
  int fd = open("/tmp/toto", O_WRONLY | O_TRUNC | O_CREAT | O_SYNC, 0644);
  size_t size = 2*1000*1000*1000; // ~2GB
  char * buffer = malloc(size);
  perror("malloc");
  if(!buffer) { return 0; }
  printf("writing ~2G in /tmp/toto... try to interrupt me with ctrl-c?\n");
  ssize_t w = write(fd, buffer, size);
  perror("write"); 
  printf("write %zd / %zd\n", w, size);
  close(fd);
}