1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
|
/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
* Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "xline.h"
/* $ModConfig: <xlinedb filename="data/xline.db">
* Specify the filename for the xline database here*/
/* $ModDesc: Keeps a dynamic log of all XLines created, and stores them in a seperate conf file (xline.db). */
class ModuleXLineDB : public Module
{
bool dirty;
std::string xlinedbpath;
public:
void init()
{
/* Load the configuration
* Note:
* this is on purpose not in the OnRehash() method. It would be non-trivial to change the database on-the-fly.
* Imagine a scenario where the new file already exists. Merging the current XLines with the existing database is likely a bad idea
* ...and so is discarding all current in-memory XLines for the ones in the database.
*/
ConfigTag* Conf = ServerInstance->Config->ConfValue("xlinedb");
xlinedbpath = Conf->getString("filename", DATA_PATH "/xline.db");
// Read xlines before attaching to events
ReadDatabase();
Implementation eventlist[] = { I_OnAddLine, I_OnDelLine, I_OnExpireLine, I_OnBackgroundTimer };
ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
dirty = false;
}
virtual ~ModuleXLineDB()
{
}
/** Called whenever an xline is added by a local user.
* This method is triggered after the line is added.
* @param source The sender of the line or NULL for local server
* @param line The xline being added
*/
void OnAddLine(User* source, XLine* line)
{
dirty = true;
}
/** Called whenever an xline is deleted.
* This method is triggered after the line is deleted.
* @param source The user removing the line or NULL for local server
* @param line the line being deleted
*/
void OnDelLine(User* source, XLine* line)
{
dirty = true;
}
void OnExpireLine(XLine *line)
{
dirty = true;
}
void OnBackgroundTimer(time_t now)
{
if (dirty)
{
if (WriteDatabase())
dirty = false;
}
}
bool WriteDatabase()
{
FILE *f;
/*
* We need to perform an atomic write so as not to fuck things up.
* So, let's write to a temporary file, flush and sync the FD, then rename the file..
* Technically, that means that this can block, but I have *never* seen that.
* -- w00t
*/
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Opening temporary database");
std::string xlinenewdbpath = xlinedbpath + ".new";
f = fopen(xlinenewdbpath.c_str(), "w");
if (!f)
{
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Cannot create database! %s (%d)", strerror(errno), errno);
ServerInstance->SNO->WriteToSnoMask('a', "database: cannot create new db: %s (%d)", strerror(errno), errno);
return false;
}
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Opened. Writing..");
/*
* Now, much as I hate writing semi-unportable formats, additional
* xline types may not have a conf tag, so let's just write them.
* In addition, let's use a file version, so we can maintain some
* semblance of backwards compatibility for reading on startup..
* -- w00t
*/
fprintf(f, "VERSION 1\n");
// Now, let's write.
std::vector<std::string> types = ServerInstance->XLines->GetAllTypes();
for (std::vector<std::string>::const_iterator it = types.begin(); it != types.end(); ++it)
{
XLineLookup* lookup = ServerInstance->XLines->GetAll(*it);
if (!lookup)
continue; // Not possible as we just obtained the list from XLineManager
for (LookupIter i = lookup->begin(); i != lookup->end(); ++i)
{
XLine* line = i->second;
fprintf(f, "LINE %s %s %s %lu %lu :%s\n", line->type.c_str(), line->Displayable(),
ServerInstance->Config->ServerName.c_str(), (unsigned long)line->set_time, (unsigned long)line->duration, line->reason.c_str());
}
}
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Finished writing XLines. Checking for error..");
int write_error = 0;
write_error = ferror(f);
write_error |= fclose(f);
if (write_error)
{
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Cannot write to new database! %s (%d)", strerror(errno), errno);
ServerInstance->SNO->WriteToSnoMask('a', "database: cannot write to new db: %s (%d)", strerror(errno), errno);
return false;
}
#ifdef _WIN32
if (remove(xlinedbpath.c_str()))
{
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Cannot remove old database! %s (%d)", strerror(errno), errno);
ServerInstance->SNO->WriteToSnoMask('a', "database: cannot remove old database: %s (%d)", strerror(errno), errno);
return false;
}
#endif
// Use rename to move temporary to new db - this is guarenteed not to fuck up, even in case of a crash.
if (rename(xlinenewdbpath.c_str(), xlinedbpath.c_str()) < 0)
{
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Cannot move new to old database! %s (%d)", strerror(errno), errno);
ServerInstance->SNO->WriteToSnoMask('a', "database: cannot replace old with new db: %s (%d)", strerror(errno), errno);
return false;
}
return true;
}
bool ReadDatabase()
{
FILE *f;
char linebuf[MAXBUF];
f = fopen(xlinedbpath.c_str(), "r");
if (!f)
{
if (errno == ENOENT)
{
/* xline.db doesn't exist, fake good return value (we don't care about this) */
return true;
}
else
{
/* this might be slightly more problematic. */
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Cannot read database! %s (%d)", strerror(errno), errno);
ServerInstance->SNO->WriteToSnoMask('a', "database: cannot read db: %s (%d)", strerror(errno), errno);
return false;
}
}
while (fgets(linebuf, MAXBUF, f))
{
char *c = linebuf;
while (c && *c)
{
if (*c == '\n')
{
*c = '\0';
}
c++;
}
// Inspired by the command parser. :)
irc::tokenstream tokens(linebuf);
int items = 0;
std::string command_p[7];
std::string tmp;
while (tokens.GetToken(tmp) && (items < 7))
{
command_p[items] = tmp;
items++;
}
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Processing %s", linebuf);
if (command_p[0] == "VERSION")
{
if (command_p[1] == "1")
{
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: Reading db version %s", command_p[1].c_str());
}
else
{
fclose(f);
ServerInstance->Logs->Log("m_xline_db",DEBUG, "xlinedb: I got database version %s - I don't understand it", command_p[1].c_str());
ServerInstance->SNO->WriteToSnoMask('a', "database: I got a database version (%s) I don't understand", command_p[1].c_str());
return false;
}
}
else if (command_p[0] == "LINE")
{
// Mercilessly stolen from spanningtree
XLineFactory* xlf = ServerInstance->XLines->GetFactory(command_p[1]);
if (!xlf)
{
ServerInstance->SNO->WriteToSnoMask('a', "database: Unknown line type (%s).", command_p[1].c_str());
continue;
}
XLine* xl = xlf->Generate(ServerInstance->Time(), atoi(command_p[5].c_str()), command_p[3], command_p[6], command_p[2]);
xl->SetCreateTime(atoi(command_p[4].c_str()));
if (ServerInstance->XLines->AddLine(xl, NULL))
{
ServerInstance->SNO->WriteToSnoMask('x', "database: Added a line of type %s", command_p[1].c_str());
}
else
delete xl;
}
}
fclose(f);
return true;
}
virtual Version GetVersion()
{
return Version("Keeps a dynamic log of all XLines created, and stores them in a separate conf file (xline.db).", VF_VENDOR);
}
};
MODULE_INIT(ModuleXLineDB)
|
