/*

 * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#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());

        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 != NULL && stop != NULL) {

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

                result = 0;

                stop();

            }

        } else {

            fprintf(stderr,

        }

        dlclose(library);

    }

    return result;

}