summaryrefslogtreecommitdiff
path: root/src/configparser.cpp
blob: 495d38fff4659336e23d68fa10c32914646d8030 (plain)
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
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
 * See: http://wiki.inspircd.org/Credits
 *
 * This program is free but copyrighted software; see
 *	    the file COPYING for details.
 *
 * ---------------------------------------------------
 */

#include "inspircd.h"
#include <fstream>
#include "configparser.h"

struct Parser
{
	ParseStack& stack;
	int flags;
	FILE* const file;
	fpos current;
	fpos last_tag;
	reference<ConfigTag> tag;
	int ungot;

	Parser(ParseStack& me, int myflags, FILE* conf, const std::string& name)
		: stack(me), flags(myflags), file(conf), current(name), last_tag(name), ungot(-1)
	{ }

	int next(bool eof_ok = false)
	{
		if (ungot != -1)
		{
			int ch = ungot;
			ungot = -1;
			return ch;
		}
		int ch = fgetc(file);
		if (ch == EOF && !eof_ok)
		{
			throw CoreException("Unexpected end-of-file");
		}
		else if (ch == '\n')
		{
			current.line++;
			current.col = 0;
		}
		else
		{
			current.col++;
		}
		return ch;
	}

	void unget(int ch)
	{
		if (ungot != -1)
			throw CoreException("INTERNAL ERROR: cannot unget twice");
		ungot = ch;
	}

	void comment()
	{
		while (1)
		{
			int ch = next();
			if (ch == '\n')
				return;
		}
	}

	void nextword(std::string& rv)
	{
		int ch = next();
		while (isspace(ch))
			ch = next();
		while (isalnum(ch) || ch == '_')
		{
			rv.push_back(ch);
			ch = next();
		}
		unget(ch);
	}

	bool kv(std::vector<KeyVal>* items)
	{
		std::string key;
		nextword(key);
		int ch = next();
		if (ch == '>' && key.empty())
		{
			return false;
		}
		else if (ch == '#' && key.empty())
		{
			comment();
			return true;
		}
		else if (ch != '=')
		{
			throw CoreException("Invalid character " + std::string(1, ch) + " in key (" + key + ")");
		}

		std::string value;
		ch = next();
		if (ch != '"')
		{
			throw CoreException("Invalid character in value of <" + tag->tag + ":" + key + ">");
		}
		while (1)
		{
			ch = next();
			if (ch == '&' && (flags & FLAG_USE_XML))
			{
				std::string varname;
				while (1)
				{
					ch = next();
					if (isalnum(ch))
						varname.push_back(ch);
					else if (ch == ';')
						break;
					else
					{
						stack.errstr << "Invalid XML entity name in value of <" + tag->tag + ":" + key + ">\n"
							<< "To include an ampersand or quote, use &amp; or &quot;\n";
						throw CoreException("Parse error");
					}
				}
				std::map<std::string, std::string>::iterator var = stack.vars.find(varname);
				if (var == stack.vars.end())
					throw CoreException("Undefined XML entity reference '&" + varname + ";'");
				value.append(var->second);
			}
			else if (ch == '\\' && !(flags & FLAG_USE_XML))
			{
				int esc = next();
				if (esc == 'n')
					value.push_back('\n');
				else if (isalpha(esc))
					throw CoreException("Unknown escape character \\" + std::string(1, esc));
				else
					value.push_back(esc);
			}
			else if (ch == '"')
				break;
			else
				value.push_back(ch);
		}
		items->push_back(KeyVal(key, value));
		return true;
	}

	void dotag()
	{
		last_tag = current;
		std::string name;
		nextword(name);

		int spc = next();
		if (spc == '>')
			unget(spc);
		else if (!isspace(spc))
			throw CoreException("Invalid character in tag name");

		if (name.empty())
			throw CoreException("Empty tag name");

		std::vector<KeyVal>* items;
		tag = ConfigTag::create(name, current.filename, current.line, items);

		while (kv(items));

		if (name == "include")
		{
			stack.DoInclude(tag, flags);
		}
		else if (name == "define")
		{
			if (!(flags & FLAG_USE_XML))
				throw CoreException("<define> tags may only be used in XML-style config (add <config format=\"xml\">)");
			std::string varname = tag->getString("name");
			std::string value = tag->getString("value");
			if (varname.empty())
				throw CoreException("Variable definition must include variable name");
			stack.vars[varname] = value;
		}
		else if (name == "config")
		{
			std::string format = tag->getString("format");
			if (format == "xml")
				flags |= FLAG_USE_XML;
			else if (format == "compat")
				flags &= ~FLAG_USE_XML;
			else if (!format.empty())
				throw CoreException("Unknown configuration format " + format);
		}
		else
		{
			stack.output.insert(std::make_pair(name, tag));
		}
		// this is not a leak; reference<> takes care of the delete
		tag = NULL;
	}

	bool outer_parse()
	{
		try
		{
			while (1)
			{
				int ch = next(true);
				switch (ch)
				{
					case EOF:
						// this is the one place where an EOF is not an error
						return true;
					case '#':
						comment();
						break;
					case '<':
						dotag();
						break;
					case ' ':
					case '\r':
					case '\t':
					case '\n':
						break;
					case 0xFE:
					case 0xFF:
						stack.errstr << "Do not save your files as UTF-16; use ASCII!\n";
					default:
						throw CoreException("Syntax error - start of tag expected");
				}
			}
		}
		catch (CoreException& err)
		{
			stack.errstr << err.GetReason() << " at " << current.str();
			if (tag)
				stack.errstr << " (inside tag " << tag->tag << " at line " << tag->src_line << ")\n";
			else
				stack.errstr << " (last tag was on line " << last_tag.line << ")\n";
		}
		return false;
	}
};

void ParseStack::DoInclude(ConfigTag* tag, int flags)
{
	if (flags & FLAG_NO_INC)
		throw CoreException("Invalid <include> tag in file included with noinclude=\"yes\"");
	std::string name;
	if (tag->readString("file", name))
	{
		if (tag->getBool("noinclude", false))
			flags |= FLAG_NO_INC;
		if (tag->getBool("noexec", false))
			flags |= FLAG_NO_EXEC;
		if (!ParseFile(name, flags))
			throw CoreException("Included");
	}
	else if (tag->readString("executable", name))
	{
		if (flags & FLAG_NO_EXEC)
			throw CoreException("Invalid <include:executable> tag in file included with noexec=\"yes\"");
		if (tag->getBool("noinclude", false))
			flags |= FLAG_NO_INC;
		if (tag->getBool("noexec", true))
			flags |= FLAG_NO_EXEC;
		if (!ParseExec(name, flags))
			throw CoreException("Included");
	}
}

bool ParseStack::ParseFile(const std::string& name, int flags)
{
	ServerInstance->Logs->Log("CONFIG", DEBUG, "Reading file %s", name.c_str());
	for (unsigned int t = 0; t < reading.size(); t++)
	{
		if (std::string(name) == reading[t])
		{
			throw CoreException("File " + name + " is included recursively (looped inclusion)");
		}
	}

	/* It's not already included, add it to the list of files we've loaded */

	FileWrapper file(fopen(name.c_str(), "r"));
	if (!file)
		throw CoreException("Could not read \"" + name + "\" for include");

	reading.push_back(name);
	Parser p(*this, flags, file, name);
	bool ok = p.outer_parse();
	reading.pop_back();
	return ok;
}

bool ParseStack::ParseExec(const std::string& name, int flags)
{
	ServerInstance->Logs->Log("CONFIG", DEBUG, "Reading executable %s", name.c_str());
	for (unsigned int t = 0; t < reading.size(); t++)
	{
		if (std::string(name) == reading[t])
		{
			throw CoreException("Executable " + name + " is included recursively (looped inclusion)");
		}
	}

	/* It's not already included, add it to the list of files we've loaded */

	FileWrapper file(popen(name.c_str(), "r"));
	if (!file)
		throw CoreException("Could not open executable \"" + name + "\" for include");

	reading.push_back(name);
	Parser p(*this, flags, file, name);
	bool ok = p.outer_parse();
	reading.pop_back();
	return ok;
}

bool ConfigTag::readString(const std::string& key, std::string& value, bool allow_lf)
{
	if (!this)
		return false;
	for(std::vector<KeyVal>::iterator j = items.begin(); j != items.end(); ++j)
	{
		if(j->first != key)
			continue;
		value = j->second;
 		if (!allow_lf && (value.find('\n') != std::string::npos))
		{
			ServerInstance->Logs->Log("CONFIG",DEFAULT, "Value of <" + tag + ":" + key + "> at " + getTagLocation() +
				" contains a linefeed, and linefeeds in this value are not permitted -- stripped to spaces.");
			for (std::string::iterator n = value.begin(); n != value.end(); n++)
				if (*n == '\n')
					*n = ' ';
		}
		return true;
	}
	return false;
}

std::string ConfigTag::getString(const std::string& key, const std::string& def)
{
	std::string res = def;
	readString(key, res);
	return res;
}

long ConfigTag::getInt(const std::string &key, long def)
{
	std::string result;
	if(!readString(key, result))
		return def;

	const char* res_cstr = result.c_str();
	char* res_tail = NULL;
	long res = strtol(res_cstr, &res_tail, 0);
	if (res_tail == res_cstr)
		return def;
	switch (toupper(*res_tail))
	{
		case 'K':
			res= res* 1024;
			break;
		case 'M':
			res= res* 1024 * 1024;
			break;
		case 'G':
			res= res* 1024 * 1024 * 1024;
			break;
	}
	return res;
}

double ConfigTag::getFloat(const std::string &key, double def)
{
	std::string result;
	if (!readString(key, result))
		return def;
	return strtod(result.c_str(), NULL);
}

bool ConfigTag::getBool(const std::string &key, bool def)
{
	std::string result;
	if(!readString(key, result))
		return def;

	return (result == "yes" || result == "true" || result == "1" || result == "on");
}

std::string ConfigTag::getTagLocation()
{
	return src_name + ":" + ConvToStr(src_line);
}

ConfigTag* ConfigTag::create(const std::string& Tag, const std::string& file, int line, std::vector<KeyVal>*&items)
{
	ConfigTag* rv = new ConfigTag(Tag, file, line);
	items = &rv->items;
	return rv;
}

ConfigTag::ConfigTag(const std::string& Tag, const std::string& file, int line)
	: tag(Tag), src_name(file), src_line(line)
{
}

std::string OperInfo::getConfig(const std::string& key)
{
	std::string rv;
	if (type_block)
		type_block->readString(key, rv);
	if (oper_block)
		oper_block->readString(key, rv);
	return rv;
}