1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2010 InspIRCd Development Team
6 * See: http://wiki.inspircd.org/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
16 /* $ModDesc: Provides support for channel mode +P to provide permanent channels */
18 // Not in a class due to circular dependancy hell.
19 static std::string permchannelsconf;
20 static bool WriteDatabase()
24 if (permchannelsconf.empty())
30 std::string tempname = permchannelsconf + ".tmp";
33 * We need to perform an atomic write so as not to fuck things up.
34 * So, let's write to a temporary file, flush and sync the FD, then rename the file..
37 f = fopen(tempname.c_str(), "w");
40 ServerInstance->Logs->Log("m_permchannels",DEFAULT, "permchannels: Cannot create database! %s (%d)", strerror(errno), errno);
41 ServerInstance->SNO->WriteToSnoMask('a', "database: cannot create new db: %s (%d)", strerror(errno), errno);
46 for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++)
48 Channel* chan = i->second;
49 if (!chan->IsModeSet('P'))
55 "<permchannels channel=",
60 chan->ChanModes(true),
64 int lpos = 0, item = 0, ipos = 0;
65 while (lpos < 1022 && item < 7)
67 char c = items[item][ipos++];
70 // end of this string; hop to next string, insert a quote
75 else if (c == '\\' || c == '"')
86 write_error = ferror(f);
87 write_error |= fclose(f);
90 ServerInstance->Logs->Log("m_permchannels",DEFAULT, "permchannels: Cannot write to new database! %s (%d)", strerror(errno), errno);
91 ServerInstance->SNO->WriteToSnoMask('a', "database: cannot write to new db: %s (%d)", strerror(errno), errno);
95 // Use rename to move temporary to new db - this is guarenteed not to fuck up, even in case of a crash.
96 if (rename(tempname.c_str(), permchannelsconf.c_str()) < 0)
98 ServerInstance->Logs->Log("m_permchannels",DEFAULT, "permchannels: Cannot move new to old database! %s (%d)", strerror(errno), errno);
99 ServerInstance->SNO->WriteToSnoMask('a', "database: cannot replace old with new db: %s (%d)", strerror(errno), errno);
108 /** Handles the +P channel mode
110 class PermChannel : public ModeHandler
113 PermChannel(Module* Creator) : ModeHandler(Creator, "permanent", 'P', PARAM_NONE, MODETYPE_CHANNEL) { oper = true; }
115 ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
119 if (!channel->IsModeSet('P'))
121 channel->SetMode('P',true);
122 return MODEACTION_ALLOW;
127 if (channel->IsModeSet('P'))
129 if (channel->GetUserCounter() == 0 && !IS_SERVER(source))
134 * We can't delete this channel the way things work at the moment,
135 * because of the following scenario:
138 * s1 has a user in #c, s2 does not. s2 has +P set. s2 has a losing TS.
140 * On netmerge, s2 loses, so s2 removes all modes (including +P) which
141 * would subsequently delete the channel here causing big fucking problems.
143 * I don't think there's really a way around this, so just deny -P on a 0 user chan.
148 return MODEACTION_DENY;
151 /* for servers, remove +P (to avoid desyncs) but don't bother trying to delete. */
152 channel->SetMode('P',false);
153 return MODEACTION_ALLOW;
157 return MODEACTION_DENY;
161 class ModulePermanentChannels : public Module
167 ModulePermanentChannels() : p(this), dirty(false)
173 ServerInstance->Modules->AddService(p);
174 Implementation eventlist[] = { I_OnChannelPreDelete, I_OnPostTopicChange, I_OnRawMode, I_OnRehash, I_OnBackgroundTimer };
175 ServerInstance->Modules->Attach(eventlist, this, 5);
183 * DelMode can't remove the +P mode on empty channels, or it will break
184 * merging modes with remote servers. Remove the empty channels now as
185 * we know this is not the case.
187 chan_hash::iterator iter = ServerInstance->chanlist->begin();
188 while (iter != ServerInstance->chanlist->end())
190 Channel* c = iter->second;
191 if (c->GetUserCounter() == 0)
193 chan_hash::iterator at = iter;
195 FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(c));
196 ServerInstance->chanlist->erase(at);
197 ServerInstance->GlobalCulls.AddItem(c);
202 ServerInstance->Modes->DelMode(&p);
203 return Module::cull();
206 virtual void OnRehash(User *user)
209 * Process config-defined list of permanent channels.
213 permchannelsconf = ServerInstance->Config->ConfValue("permchanneldb")->getString("filename");
215 ConfigTagList permchannels = ServerInstance->Config->ConfTags("permchannels");
216 for (ConfigIter i = permchannels.first; i != permchannels.second; ++i)
218 ConfigTag* tag = i->second;
219 std::string channel = tag->getString("channel");
220 std::string topic = tag->getString("topic");
221 std::string modes = tag->getString("modes");
225 ServerInstance->Logs->Log("blah", DEBUG, "Malformed permchannels tag with empty channel name.");
229 Channel *c = ServerInstance->FindChan(channel);
233 c = new Channel(channel, ServerInstance->Time());
236 c->SetTopic(NULL, topic, true);
239 * Due to the way protocol works in 1.2, we need to hack the topic TS in such a way that this
240 * topic will always win over others.
242 * This is scheduled for (proper) fixing in a later release, and can be removed at a later date.
246 ServerInstance->Logs->Log("blah", DEBUG, "Added %s with topic %s", channel.c_str(), topic.c_str());
251 irc::spacesepstream list(modes);
255 list.GetToken(modeseq);
257 // XXX bleh, should we pass this to the mode parser instead? ugly. --w00t
258 for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
260 ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
263 if (mode->GetNumParams(true))
268 mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, c, par, true);
275 virtual ModResult OnRawMode(User* user, Channel* chan, const char mode, const std::string ¶m, bool adding, int pcnt)
277 if (chan && (chan->IsModeSet('P') || mode == 'P'))
280 return MOD_RES_PASSTHRU;
283 virtual void OnPostTopicChange(User*, Channel *c, const std::string&)
285 if (c->IsModeSet('P'))
289 void OnBackgroundTimer(time_t)
296 virtual Version GetVersion()
298 return Version("Provides support for channel mode +P to provide permanent channels",VF_VENDOR);
301 virtual ModResult OnChannelPreDelete(Channel *c)
303 if (c->IsModeSet('P'))
306 return MOD_RES_PASSTHRU;
310 MODULE_INIT(ModulePermanentChannels)