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1 /*
2  * InspIRCd -- Internet Relay Chat Daemon
3  *
4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
5  *
6  * This file is part of InspIRCd.  InspIRCd is free software: you can
7  * redistribute it and/or modify it under the terms of the GNU General Public
8  * License as published by the Free Software Foundation, version 2.
9  *
10  * This program is distributed in the hope that it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
13  * details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
17  */
18
19
20 #define MODNAME cmd_all
21
22 #include "inspircd.h"
23 #include "exitcodes.h"
24 #include <iostream>
25
26 #ifdef PURE_STATIC
27
28 typedef std::map<std::string, AllModuleList*> modmap;
29 static std::vector<AllCommandList::fn>* cmdlist = NULL;
30 static modmap* modlist = NULL;
31
32 AllCommandList::AllCommandList(fn cmd)
33 {
34         if (!cmdlist)
35                 cmdlist = new std::vector<AllCommandList::fn>();
36         cmdlist->push_back(cmd);
37 }
38
39 AllModuleList::AllModuleList(AllModuleList::fn mod, const std::string& Name) : init(mod), name(Name)
40 {
41         if (!modlist)
42                 modlist = new modmap();
43         modlist->insert(std::make_pair(Name, this));
44 }
45
46 class AllModule : public Module
47 {
48         std::vector<Command*> cmds;
49  public:
50         AllModule()
51         {
52                 if (!cmdlist)
53                         return;
54                 try
55                 {
56                         cmds.reserve(cmdlist->size());
57                         for(std::vector<AllCommandList::fn>::iterator i = cmdlist->begin(); i != cmdlist->end(); ++i)
58                         {
59                                 Command* c = (*i)(this);
60                                 cmds.push_back(c);
61                                 ServerInstance->Modules->AddService(*c);
62                         }
63                 }
64                 catch (...)
65                 {
66                         this->AllModule::~AllModule();
67                         throw;
68                 }
69         }
70
71         ~AllModule()
72         {
73                 for(std::vector<Command*>::iterator i = cmds.begin(); i != cmds.end(); ++i)
74                         delete *i;
75         }
76
77         Version GetVersion()
78         {
79                 return Version("All commands", VF_VENDOR|VF_CORE);
80         }
81 };
82
83 MODULE_INIT(AllModule)
84
85 bool ModuleManager::Load(const std::string& name, bool defer)
86 {
87         modmap::iterator it = modlist->find(name);
88         if (it == modlist->end())
89                 return false;
90         Module* mod = NULL;
91         try
92         {
93                 mod = (*it->second->init)();
94                 mod->ModuleSourceFile = name;
95                 mod->ModuleDLLManager = NULL;
96                 mod->dying = false;
97                 Modules[name] = mod;
98                 if (defer)
99                 {
100                         ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "New module introduced: %s", name.c_str());
101                         return true;
102                 }
103                 else
104                 {
105                         AttachAll(mod);
106                         mod->init();
107                 }
108         }
109         catch (CoreException& modexcept)
110         {
111                 if (mod)
112                         DoSafeUnload(mod);
113                 ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Unable to load " + name + ": " + modexcept.GetReason());
114                 return false;
115         }
116         FOREACH_MOD(OnLoadModule, (mod));
117         /* We give every module a chance to re-prioritize when we introduce a new one,
118          * not just the one thats loading, as the new module could affect the preference
119          * of others
120          */
121         for(int tries = 0; tries < 20; tries++)
122         {
123                 prioritizationState = tries > 0 ? PRIO_STATE_LAST : PRIO_STATE_FIRST;
124                 for (std::map<std::string, Module*>::iterator n = Modules.begin(); n != Modules.end(); ++n)
125                         n->second->Prioritize();
126
127                 if (prioritizationState == PRIO_STATE_LAST)
128                         break;
129                 if (tries == 19)
130                         ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Hook priority dependency loop detected while loading " + name);
131         }
132
133         ServerInstance->ISupport.Build();
134         return true;
135 }
136
137 namespace {
138         struct UnloadAction : public HandlerBase0<void>
139         {
140                 Module* const mod;
141                 UnloadAction(Module* m) : mod(m) {}
142                 void Call()
143                 {
144                         ServerInstance->Modules->DoSafeUnload(mod);
145                         ServerInstance->GlobalCulls.Apply();
146                         ServerInstance->GlobalCulls.AddItem(this);
147                 }
148         };
149
150         struct ReloadAction : public HandlerBase0<void>
151         {
152                 Module* const mod;
153                 HandlerBase1<void, bool>* const callback;
154                 ReloadAction(Module* m, HandlerBase1<void, bool>* c)
155                         : mod(m), callback(c) {}
156                 void Call()
157                 {
158                         std::string name = mod->ModuleSourceFile;
159                         ServerInstance->Modules->DoSafeUnload(mod);
160                         ServerInstance->GlobalCulls.Apply();
161                         bool rv = ServerInstance->Modules->Load(name.c_str());
162                         callback->Call(rv);
163                         ServerInstance->GlobalCulls.AddItem(this);
164                 }
165         };
166 }
167
168 bool ModuleManager::Unload(Module* mod)
169 {
170         if (!CanUnload(mod))
171                 return false;
172         ServerInstance->AtomicActions.AddAction(new UnloadAction(mod));
173         return true;
174 }
175
176 void ModuleManager::Reload(Module* mod, HandlerBase1<void, bool>* callback)
177 {
178         if (CanUnload(mod))
179                 ServerInstance->AtomicActions.AddAction(new ReloadAction(mod, callback));
180         else
181                 callback->Call(false);
182 }
183
184 void ModuleManager::LoadAll()
185 {
186         Load("cmd_all", true);
187         Load("cmd_whowas.so", true);
188         Load("cmd_lusers.so", true);
189         Load("cmd_privmsg.so", true);
190
191         ConfigTagList tags = ServerInstance->Config->ConfTags("module");
192         for(ConfigIter i = tags.first; i != tags.second; ++i)
193         {
194                 ConfigTag* tag = i->second;
195                 std::string name = tag->getString("name");
196                 std::cout << "[" << con_green << "*" << con_reset << "] Loading module:\t" << con_green << name << con_reset << std::endl;
197
198                 if (!this->Load(name, true))
199                 {
200                         ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, this->LastError());
201                         std::cout << std::endl << "[" << con_red << "*" << con_reset << "] " << this->LastError() << std::endl << std::endl;
202                         ServerInstance->Exit(EXIT_STATUS_MODULE);
203                 }
204         }
205
206         for(std::map<std::string, Module*>::iterator i = Modules.begin(); i != Modules.end(); i++)
207         {
208                 Module* mod = i->second;
209                 try
210                 {
211                         AttachAll(mod);
212                         mod->init();
213                 }
214                 catch (CoreException& modexcept)
215                 {
216                         LastModuleError = "Unable to initialize " + mod->ModuleSourceFile + ": " + modexcept.GetReason();
217                         ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, LastModuleError);
218                         std::cout << std::endl << "[" << con_red << "*" << con_reset << "] " << LastModuleError << std::endl << std::endl;
219                         ServerInstance->Exit(EXIT_STATUS_MODULE);
220                 }
221         }
222
223         /* We give every module a chance to re-prioritize when we introduce a new one,
224          * not just the one thats loading, as the new module could affect the preference
225          * of others
226          */
227         for(int tries = 0; tries < 20; tries++)
228         {
229                 prioritizationState = tries > 0 ? PRIO_STATE_LAST : PRIO_STATE_FIRST;
230                 for (std::map<std::string, Module*>::iterator n = Modules.begin(); n != Modules.end(); ++n)
231                         n->second->Prioritize();
232
233                 if (prioritizationState == PRIO_STATE_LAST)
234                         break;
235                 if (tries == 19)
236                 {
237                         ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Hook priority dependency loop detected");
238                         ServerInstance->Exit(EXIT_STATUS_MODULE);
239                 }
240         }
241 }
242
243 #endif