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

main(int argc, char *argv[]) {
  FILE *fp;

  if ((fp = fopen(argv[1], "w")) == NULL) {
    fprintf(stderr,
      "fatal: cannot open:\n  file=%s,\n  errno=%s\n",
      argv[1], strerror(errno));
    return 1;
  }

  while (1) {
    if (fputs("0", fp) != 0) {
      fprintf(stderr,
        "error: problem writing:\n  file=%s,\n  errno=%s\n",
        argv[1], strerror(errno));
      break;
    }
    if (fflush(fp) != 0) {
      fprintf(stderr,
        "error: problem flushing:\n  file=%s,\n  errno=%s\n",
        argv[1], strerror(errno));
      break;
    }
  }

  if (fclose(fp) != 0) {
    fprintf(stderr,
      "error: problem closing:\n  file=%s,\n  errno=%s\n",
      argv[1], strerror(errno));
  }

  return 0;
}