1 /*
   2  * Copyright (c) 2014, 2017, Oracle and/or its affiliates.
   3  * All rights reserved. Use is subject to license terms.
   4  *
   5  * This file is available and licensed under the following license:
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  *  - Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *  - Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the distribution.
  16  *  - Neither the name of Oracle Corporation nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32 
  33 #include <X11/Xlib.h>
  34 #include <dlfcn.h>
  35 #include <locale.h>
  36 #include <string>
  37 #include <libgen.h>
  38 #include <stdio.h>
  39 #include <unistd.h>
  40 
  41 
  42 typedef bool (*start_launcher)(int argc, char* argv[]);
  43 typedef void (*stop_launcher)();
  44 
  45 #define MAX_PATH 1024
  46 
  47 std::string GetProgramPath() {
  48     size_t len = 0;
  49     std::string result;
  50     char buffer[MAX_PATH] = {0};
  51 
  52     if ((len = readlink("/proc/self/exe", buffer, MAX_PATH - 1)) != -1) {
  53         buffer[len] = '\0';
  54         result = buffer;
  55     }
  56 
  57     return result;
  58 }
  59 
  60 int main(int argc, char *argv[]) {
  61     int result = 1;
  62     XInitThreads();
  63     setlocale(LC_ALL, "en_US.utf8");
  64     void* library = NULL;
  65 
  66     {
  67         std::string programPath = GetProgramPath();
  68         std::string libraryName = dirname((char*)programPath.c_str());
  69         libraryName += "/libpackager.so";
  70         library = dlopen(libraryName.c_str(), RTLD_LAZY);
  71 
  72         if (library == NULL) {
  73             printf("%s not found.\n", libraryName.c_str());
  74         }
  75     }
  76 
  77     if (library != NULL) {
  78         start_launcher start = (start_launcher)dlsym(library, "start_launcher");
  79         stop_launcher stop = (stop_launcher)dlsym(library, "stop_launcher");
  80 
  81         if (start(argc, argv) == true) {
  82             result = 0;
  83 
  84             if (stop != NULL) {
  85                 stop();
  86             }
  87         }
  88 
  89         dlclose(library);
  90     }
  91 
  92 
  93     return result;
  94 }