src/dynamic.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "dynamic.h"
  16 #ifndef WIN32
  17 #include <dlfcn.h>
  18 #endif
  19
  20 DLLManager::DLLManager(InspIRCd* ServerInstance, const char *fname)
  21 {
  22         err = NULL;
  23
  24         if (!strstr(fname,".so"))
  25         {
  26                 err = "This doesn't look like a module file to me...";
  27                 return;
  28         }
  29
  30         h = dlopen(fname, RTLD_NOW|RTLD_LOCAL);
  31         if (!h)
  32         {
  33                 err = (char*)dlerror();
  34                 return;
  35         }
  36 }
  37
  38 DLLManager::~DLLManager()
  39 {
  40         /* close the library */
  41         if (h)
  42                 dlclose(h);
  43 }
  44
  45
  46
  47 bool DLLManager::GetSymbol(void** v, const char* sym_name)
  48 {
  49         /*
  50          * try extract a symbol from the library
  51          * get any error message is there is any
  52          */
  53
  54         if (h)
  55         {
  56                 dlerror(); // clear value
  57                 *v = dlsym(h, sym_name);
  58                 err = (char*)dlerror();
  59                 if (!*v || err)
  60                         return false;
  61         }
  62
  63         /* succeeded :) */
  64         return true;
  65 }
  66
  67 DLLFactoryBase::DLLFactoryBase(InspIRCd* Instance, const char* fname, const char* symbol) : DLLManager(Instance, fname)
  68 {
  69         /* try get the factory function if there is no error yet */
  70         factory_func = 0;
  71
  72         if (!LastError())
  73         {
  74                 if (!GetSymbol( (void **)&factory_func, symbol ? symbol : "init_module"))
  75                 {
  76                         throw ModuleException("Missing init_module() entrypoint!");
  77                 }
  78         }
  79 }
  80
  81 DLLFactoryBase::~DLLFactoryBase()
  82 {
  83 }
  84