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 "configreader.h"
  16 #include "dynamic.h"
  17 #ifndef WIN32
  18 #include <dlfcn.h>
  19 #endif
  20
  21 DLLManager::DLLManager(InspIRCd* ServerInstance, const char *fname)
  22 {
  23         err = NULL;
  24
  25         if (!strstr(fname,".so"))
  26         {
  27                 err = "This doesn't look like a module file to me...";
  28                 return;
  29         }
  30
  31         h = dlopen(fname, RTLD_NOW|RTLD_LOCAL);
  32         if (!h)
  33         {
  34                 err = (char*)dlerror();
  35                 return;
  36         }
  37 }
  38
  39 DLLManager::~DLLManager()
  40 {
  41         // close the library if it isn't null
  42         if (h)
  43                 dlclose(h);
  44 }
  45
  46
  47
  48 bool DLLManager::GetSymbol(void** v, const char* sym_name)
  49 {
  50         // try extract a symbol from the library
  51         // get any error message is there is any
  52
  53         if (h)
  54         {
  55                 dlerror(); // clear value
  56                 *v = dlsym(h, sym_name);
  57                 err = (char*)dlerror();
  58                 if (!*v || err)
  59                         return false;
  60         }
  61
  62         if (err)
  63         {
  64                 return false;
  65         }
  66         else
  67         {
  68                 return true;
  69         }
  70 }
  71
  72 DLLFactoryBase::DLLFactoryBase(InspIRCd* Instance, const char* fname, const char* symbol) : DLLManager(Instance, fname)
  73 {
  74         // try get the factory function if there is no error yet
  75         factory_func = 0;
  76
  77         if (!LastError())
  78         {
  79                 if (!GetSymbol( (void **)&factory_func, symbol ? symbol : "init_module"))
  80                 {
  81                         throw ModuleException("Missing init_module() entrypoint!");
  82                 }
  83         }
  84 }
  85
  86 DLLFactoryBase::~DLLFactoryBase()
  87 {
  88 }
  89