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


int
main(int argc,char **argv)
{
        int file;

        // clean up (may not be necessary)
        remove("__directory/1");
        remove("__directory");
        remove("__file");

        file = open("__file", O_CREAT | O_TRUNC | O_WRONLY);
        if (file < 0)
                return -1;
        close(file);

        if (chmod("__file", 0644) != 0)
                printf("chmod fails: %s\n", strerror(errno));

        if (mkdir("__directory", 0755) != 0)
                return -1;

        // create a file in that directory
        file = open("__directory/1", O_CREAT | O_WRONLY);
        close(file);

        errno = 0;

        puts("rename test: Overwrite a directory with files in it");
        printf("  %s\n",rename("__file", "__directory") ? "Could not rename file!" : "Rename succeeded.");
        printf("  errno = %d (%s)\n", errno, strerror(errno));

        remove("__directory/1");
        errno = 0;

        // rename the file and try to remove the directory
        puts("rename test: Overwrite an empty directory");
        printf("  %s\n", rename("__file","__directory") ? "Could not rename file!" : "Rename succeeded.");
        printf("  errno = %d (%s)\n", errno, strerror(errno));

        remove("__directory");
        remove("__file");

        return 0;
}