/*

 * Copyright (c) 2014, 2017, Oracle and/or its affiliates.

 * All rights reserved. Use is subject to license terms.

 *

 * This file is available and licensed under the following license:

 *

 * 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 Oracle Corporation 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 <dlfcn.h>

#include <locale.h>

#include <string>

#include <libgen.h>

#include <stdio.h>

#include <unistd.h>

typedef bool (*start_launcher)(int argc, char* argv[]);

typedef void (*stop_launcher)();

#define MAX_PATH 1024

std::string GetProgramPath() {

    ssize_t len = 0;

    std::string result;

    char buffer[MAX_PATH] = {0};

    if ((len = readlink("/proc/self/exe", buffer, MAX_PATH - 1)) != -1) {

        buffer[len] = '\0';

        result = buffer;

    }

    return result;

}

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

    int result = 1;

    setlocale(LC_ALL, "en_US.utf8");

    void* library = NULL;

    {

        std::string programPath = GetProgramPath();

        std::string libraryName = dirname((char*)programPath.c_str());

        libraryName += "/libpackager.so";

        library = dlopen(libraryName.c_str(), RTLD_LAZY);

        if (library == NULL) {

            fprintf(stderr, "dlopen failed: %s\n", dlerror());

            fprintf(stderr, "%s not found.\n", libraryName.c_str());

        }

    }

    if (library != NULL) {

        start_launcher start = (start_launcher)dlsym(library, "start_launcher");

        stop_launcher stop = (stop_launcher)dlsym(library, "stop_launcher");

        if (start(argc, argv) == true) {

            result = 0;

            if (stop != NULL) {

                stop();

            }

        }

        dlclose(library);

    }

    return result;

}