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

int main(int argc, char **argv) {
  if (argc < 2) {
    fprintf(stderr, "%s: <file> <target>\n", argv[0]);
    return 1;
  }
  const char *file = argv[1];
  const char *target = argv[2];
  int fd = -1;
  while (1) {
    unlink(file);
    fd = open(file, O_CREAT | O_RDWR | O_TRUNC, 0777);
    close(fd);
    unlink(file);
    symlink(target, file);
  }
}