am 9f50abde: Add basic readlink command

	load_policy \

	swapon \

	swapoff \

	mkswap

	mkswap \

	readlink

ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))

TOOLS += r

/*

 * Copyright (c) 2013, The Android Open Source Project

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *  * Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *  * Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *  * Neither the name of Google, Inc. nor the names of its contributors

 *    may be used to endorse or promote products derived from this

 *    software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS

 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT

 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#include <limits.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

static void usage(char* name) {

    fprintf(stderr, "Usage: %s FILE\n", name);

}

int readlink_main(int argc, char* argv[]) {

    if (argc != 2) {

        usage(argv[0]);

        return EXIT_FAILURE;

    }

    char name[PATH_MAX+1];

    ssize_t len = readlink(argv[1], name, PATH_MAX);

    if (len < 0) {

        perror("readlink");

        return EXIT_FAILURE;

    }

    name[len] = '\0';

    printf("%s\n", name);

    return EXIT_SUCCESS;

}