source: MondoRescue/branches/2.2.5/mindi-busybox/coreutils/readlink.c

/* 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 or later, see file LICENSE in this tarball for details.
 */

#include <getopt.h>

#include "libbb.h"

int readlink_main(int argc, char **argv);
int readlink_main(int argc, char **argv)
{
    char *buf;
    char *fname;

    USE_FEATURE_READLINK_FOLLOW(
        unsigned opt;
        /* We need exactly one non-option argument.  */
        opt_complementary = "=1";
        opt = getopt32(argv, "f");
        fname = argv[optind];
    )
    SKIP_FEATURE_READLINK_FOLLOW(
        const unsigned opt = 0;
        if (argc != 2) bb_show_usage();
        fname = argv[1];
    )

    /* compat: coreutils readlink reports errors silently via exit code */
    logmode = LOGMODE_NONE;

    if (opt) {
        buf = realpath(fname, bb_common_bufsiz1);
    } else {
        buf = xmalloc_readlink_or_warn(fname);
    }

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

    if (ENABLE_FEATURE_CLEAN_UP && !opt)
        free(buf);

    fflush_stdout_and_exit(EXIT_SUCCESS);
}