src/dragonblockslauncher/launcher.cpp

   1 #include <iostream>
   2 #include <dlfcn.h>
   3 #include <stdlib.h>
   4 #include "dragonblockslauncher/launcher.hpp"
   5
   6 using namespace dragonblockslauncher;
   7
   8 void dragonblockslauncher::log(std::string message)
   9 {
  10         std::cout << "[Launcher] " << message << std::endl;
  11 }
  12
  13 void dragonblockslauncher::fail(std::string error, std::string details)
  14 {
  15         std::cerr
  16                 << "Unable to launch dragonblocks: " << error << std::endl
  17                 << "Details: " << details << std::endl;
  18         abort();
  19 }
  20
  21 void dragonblockslauncher::launchDragonblocks(std::string gametype)
  22 {
  23         void* handle;
  24         std::string filename;
  25         std::string start_function_name;
  26         void (*start_function)();
  27
  28         filename = "./libdragonblocks.so";
  29
  30         log("Opening dynamic library at " + filename);
  31
  32         handle = dlmopen(LM_ID_BASE, filename.c_str(), RTLD_NOW | RTLD_GLOBAL);
  33
  34         if (!handle)
  35                 fail("Failed to load " + filename, dlerror());
  36
  37         if (gametype != "server" && gametype != "client" && gametype != "mainmenu")
  38                 fail("Trying to start dragonblocks with unknown gametype", "gameype = " + gametype);
  39
  40         start_function_name = "_dragonblocks_start_" + gametype;
  41
  42         log("Obtaining start function pointer");
  43
  44         start_function = (void (*)())dlsym(handle, start_function_name.c_str());
  45
  46         if (!start_function)
  47                 fail("Failed to obtain dragonblocks start function pointer", dlerror());
  48
  49         log("Launching dragonblocks");
  50
  51         (*start_function)();
  52 }