src/dynamic.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include "globals.h"
  20 #include "inspircd_config.h"
  21 #include "dynamic.h"
  22
  23 #ifndef STATIC_LINK
  24 #include <dlfcn.h>
  25 #else
  26 #include "modlist.h"
  27 #endif
  28
  29 #include "inspstring.h"
  30 #include "helperfuncs.h"
  31
  32 DLLManager::DLLManager(char *fname)
  33 {
  34 #ifdef STATIC_LINK
  35         this->staticname[0] = '\0';
  36         log(DEBUG,"Loading core-compiled module '%s'",fname);
  37         for (int j = 0; modsyms[j].name; j++)
  38         {
  39                 log(DEBUG,"Check %s",modsyms[j].name);
  40                 if (!strcmp(modsyms[j].name,fname))
  41                 {
  42                         log(DEBUG,"Found %s",fname);
  43                         strlcpy(this->staticname,fname,1020);
  44                         err = 0;
  45                         return;
  46                 }
  47         }
  48         err = "Module is not statically compiled into the ircd";
  49 #else
  50     // Try to open the library now and get any error message.
  51
  52         h = dlopen( fname, RTLD_NOW );
  53         err = (char*)dlerror();
  54 #endif
  55 }
  56
  57 DLLManager::~DLLManager()
  58 {
  59 #ifndef STATIC_LINK
  60         // close the library if it isn't null
  61         if (h != 0)
  62         dlclose(h);
  63 #endif
  64 }
  65
  66
  67
  68 #ifdef STATIC_LINK
  69
  70 bool DLLManager::GetSymbol(initfunc* &v, char *sym_name)
  71 {
  72         log(DEBUG,"Symbol search...");
  73         for (int j = 0; modsyms[j].name; j++)
  74         {
  75                 if (!strcmp(this->staticname,modsyms[j].name))
  76                 {
  77                         log(DEBUG,"Loading symbol...");
  78                         v = modsyms[j].value;
  79                         err = 0;
  80                         return true;
  81                 }
  82         }
  83         err = "Module symbol missing from the core";
  84         return false;
  85 }
  86
  87 #else
  88
  89 bool DLLManager::GetSymbol(void **v, char *sym_name)
  90 {
  91         // try extract a symbol from the library
  92         // get any error message is there is any
  93
  94         if(h != 0)
  95         {
  96                 *v = dlsym( h, sym_name );
  97                 err = (char*)dlerror();
  98                 if( err == 0 )
  99                         return true;
 100                 else
 101                         return false;
 102         }
 103         else
 104         {
 105                 return false;
 106         }
 107 }
 108
 109 #endif
 110
 111 DLLFactoryBase::DLLFactoryBase(char *fname, char *factory) : DLLManager(fname)
 112 {
 113         // try get the factory function if there is no error yet
 114
 115         factory_func = 0;
 116
 117         if(LastError() == 0)
 118         {
 119 #ifdef STATIC_LINK
 120                 GetSymbol( factory_func, factory ? factory : (char*)"init_module" );
 121 #else
 122                 GetSymbol( (void **)&factory_func, factory ? factory : (char*)"init_module" );
 123 #endif
 124         }
 125 }
 126
 127
 128 DLLFactoryBase::~DLLFactoryBase()
 129 {
 130 }