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

void open_some_file(const char *file) {
  int fd = open(file, O_CREAT | O_EXCL | O_RDONLYWRONLY);
  if (fd != -1) {
    FILE *f = fdopen(fd, "rw+w");
    if (f != NULL) {
      printf("access granted.\n");
      /* write to file */
      if (fclose(f) != 0) {
        /* handle error */
      }
    }
    if (close(fd) != 0) {
      /* handle error */
    }
  }
}