source: MondoRescue/branches/stable/mindi-busybox/debianutils/readlink.c@ 821

/* vi: set sw=4 ts=4: */
/*
 * Mini readlink implementation for busybox
 *
 * Copyright (C) 2000,2001 Matt Kraai <kraai@alumni.carnegiemellon.edu>
 *
 * Licensed under GPL v2, see file LICENSE in this tarball for details.
 */

#include "busybox.h"
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <getopt.h>

#define READLINK_FLAG_f (1 << 0)

int readlink_main(int argc, char **argv)
{
    char *buf;
    unsigned long opt = ENABLE_FEATURE_READLINK_FOLLOW ?
                            bb_getopt_ulflags(argc, argv, "f") : 0;

    if (argc != (ENABLE_FEATURE_READLINK_FOLLOW ? optind + 1 : 2))
            bb_show_usage();

    if (opt & READLINK_FLAG_f)
        buf = realpath(argv[optind], bb_common_bufsiz1);
    else
        buf = xreadlink(argv[ENABLE_FEATURE_READLINK_FOLLOW ? optind : 1]);

    if (!buf)
        return EXIT_FAILURE;
    puts(buf);

    if (ENABLE_FEATURE_CLEAN_UP && buf != bb_common_bufsiz1)
        free(buf);

    return EXIT_SUCCESS;
}