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1 | /* GNU Thales - IRC to Relational Database Gateway | |
2 | * Copyright (C) 2002 Lucas Nussbaum <lucas@lucas-nussbaum.net> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | */ | |
18 | ||
19 | /* Configuration file handling. */ | |
20 | ||
21 | #include "conf.h" | |
22 | #include "misc.h" | |
23 | #include "compat.h" | |
24 | ||
25 | extern int debug; | |
26 | ||
27 | ||
28 | /* configuration variables: */ | |
29 | char *RemoteServer; | |
30 | int RemotePort; | |
31 | char *RemotePassword; | |
32 | char *LocalHost; | |
33 | int LocalPort; | |
34 | ||
35 | char *ServerName; | |
36 | char *ServerDesc; | |
37 | char *PIDFilename; | |
38 | char *LogFilename; | |
39 | ||
40 | char *MysqlServer; | |
41 | char *MysqlDatabase; | |
42 | char *MysqlUser; | |
43 | char *MysqlPassword; | |
44 | ||
45 | int UserCacheTime; | |
46 | int UserCleanFreq; | |
47 | ||
48 | int ServerCacheTime; | |
49 | int ServerCleanFreq; | |
50 | ||
51 | int HidePasswords; | |
52 | ||
53 | Directive directives[] = { | |
54 | {"RemoteServer", {{PARAM_STRING, 0, &RemoteServer}, | |
55 | {PARAM_PORT, 0, &RemotePort}, | |
56 | {PARAM_STRING, 0, &RemotePassword}}}, | |
57 | {"LocalAddress", {{PARAM_STRING, 0, &LocalHost}, | |
58 | {PARAM_PORT, PARAM_OPTIONAL, &LocalPort}}}, | |
59 | {"ServerDesc", {{PARAM_STRING, 0, &ServerDesc}}}, | |
60 | {"ServerName", {{PARAM_STRING, 0, &ServerName}}}, | |
61 | {"MysqlServer", {{PARAM_STRING, 0, &MysqlServer}}}, | |
62 | {"MysqlDatabase", {{PARAM_STRING, 0, &MysqlDatabase}}}, | |
63 | {"MysqlUser", {{PARAM_STRING, 0, &MysqlUser}}}, | |
64 | {"MysqlPassword", {{PARAM_STRING, 0, &MysqlPassword}}}, | |
65 | {"PIDFile", {{PARAM_STRING, 0, &PIDFilename}}}, | |
66 | {"LogFile", {{PARAM_STRING, 0, &LogFilename}}}, | |
67 | {"UserCacheTime", {{PARAM_POSINT, 0, &UserCacheTime}}}, | |
68 | {"ServerCacheTime", {{PARAM_POSINT, 0, &ServerCacheTime}}}, | |
69 | {"UserCleanFreq", {{PARAM_POSINT, 0, &UserCleanFreq}}}, | |
70 | {"ServerCleanFreq", {{PARAM_POSINT, 0, &ServerCleanFreq}}}, | |
71 | {"HidePasswords", {{PARAM_SET, 0, &HidePasswords}}}, | |
72 | }; | |
73 | ||
74 | /*************************************************************************/ | |
75 | ||
76 | /* Print an error message to the log (and the console, if open). */ | |
77 | ||
78 | void error(int linenum, char *message, ...) | |
79 | { | |
80 | char buf[4096]; | |
81 | va_list args; | |
82 | ||
83 | va_start(args, message); | |
84 | vsnprintf(buf, sizeof(buf), message, args); | |
85 | if (linenum) | |
86 | mylog("%s:%d: %s", THALES_CONF, linenum, buf); | |
87 | else | |
88 | mylog("%s: %s", THALES_CONF, buf); | |
89 | if (!debug && isatty(2)) | |
90 | { | |
91 | if (linenum) | |
92 | fprintf(stderr, "%s:%d: %s\n", THALES_CONF, linenum, buf); | |
93 | else | |
94 | fprintf(stderr, "%s: %s\n", THALES_CONF, buf); | |
95 | } | |
96 | } | |
97 | ||
98 | /*************************************************************************/ | |
99 | ||
100 | /* Parse a configuration line. Return 1 on success; otherwise, print an | |
101 | * appropriate error message and return 0. Destroys the buffer by side | |
102 | * effect. | |
103 | */ | |
104 | ||
105 | int parse(char *buf, int linenum, int reload) | |
106 | { | |
107 | char *s, *t, *dir; | |
108 | int i, n, optind, val; | |
109 | int retval = 1; | |
110 | int ac = 0; | |
111 | char *av[MAXPARAMS]; | |
112 | ||
113 | dir = strtok(buf, " \t\r\n"); | |
114 | s = strtok(NULL, ""); | |
115 | if (s) | |
116 | { | |
117 | while (isspace(*s)) | |
118 | s++; | |
119 | while (*s) | |
120 | { | |
121 | if (ac >= MAXPARAMS) | |
122 | { | |
123 | error(linenum, "Warning: too many parameters (%d max)", | |
124 | MAXPARAMS); | |
125 | break; | |
126 | } | |
127 | t = s; | |
128 | if (*s == '"') | |
129 | { | |
130 | t++; | |
131 | s++; | |
132 | while (*s && *s != '"') | |
133 | { | |
134 | if (*s == '\\' && s[1] != 0) | |
135 | s++; | |
136 | s++; | |
137 | } | |
138 | if (!*s) | |
139 | error(linenum, | |
140 | "Warning: unterminated double-quoted string"); | |
141 | else | |
142 | *s++ = 0; | |
143 | } | |
144 | else | |
145 | { | |
146 | s += strcspn(s, " \t\r\n"); | |
147 | if (*s) | |
148 | *s++ = 0; | |
149 | } | |
150 | av[ac++] = t; | |
151 | while (isspace(*s)) | |
152 | s++; | |
153 | } | |
154 | } | |
155 | ||
156 | if (!dir) | |
157 | return 1; | |
158 | ||
159 | for (n = 0; n < lenof(directives); n++) | |
160 | { | |
161 | Directive *d = &directives[n]; | |
162 | if (stricmp(dir, d->name) != 0) | |
163 | continue; | |
164 | optind = 0; | |
165 | for (i = 0; i < MAXPARAMS && d->params[i].type != PARAM_NONE; i++) | |
166 | { | |
167 | if (reload && !(d->params[i].flags & PARAM_RELOAD)) | |
168 | continue; | |
169 | ||
170 | if (d->params[i].type == PARAM_SET) | |
171 | { | |
172 | *(int *) d->params[i].ptr = 1; | |
173 | continue; | |
174 | } | |
175 | #ifdef STREAMLINED | |
176 | if (d->params[i].flags & PARAM_FULLONLY) | |
177 | { | |
178 | error(linenum, | |
179 | "Directive `%s' not available in STREAMLINED mode", | |
180 | d->name); | |
181 | break; | |
182 | } | |
183 | #endif | |
184 | ||
185 | if (d->params[i].type == PARAM_DEPRECATED) | |
186 | { | |
187 | void (*func) (void); | |
188 | error(linenum, "Deprecated directive `%s' used", d->name); | |
189 | func = (void (*)(void)) (d->params[i].ptr); | |
190 | func(); /* For clarity */ | |
191 | continue; | |
192 | } | |
193 | if (optind >= ac) | |
194 | { | |
195 | if (!(d->params[i].flags & PARAM_OPTIONAL)) | |
196 | { | |
197 | error(linenum, "Not enough parameters for `%s'", d->name); | |
198 | retval = 0; | |
199 | } | |
200 | break; | |
201 | } | |
202 | switch (d->params[i].type) | |
203 | { | |
204 | case PARAM_INT: | |
205 | val = strtol(av[optind++], &s, 0); | |
206 | if (*s) | |
207 | { | |
208 | error(linenum, "%s: Expected an integer for parameter %d", | |
209 | d->name, optind); | |
210 | retval = 0; | |
211 | break; | |
212 | } | |
213 | *(int *) d->params[i].ptr = val; | |
214 | break; | |
215 | case PARAM_POSINT: | |
216 | val = strtol(av[optind++], &s, 0); | |
217 | if (*s || val < 0) | |
218 | { | |
219 | error(linenum, | |
220 | "%s: Expected a positive integer for parameter %d", | |
221 | d->name, optind); | |
222 | retval = 0; | |
223 | break; | |
224 | } | |
225 | *(int *) d->params[i].ptr = val; | |
226 | break; | |
227 | case PARAM_PORT: | |
228 | val = strtol(av[optind++], &s, 0); | |
229 | if (*s) | |
230 | { | |
231 | error(linenum, | |
232 | "%s: Expected a port number for parameter %d", | |
233 | d->name, optind); | |
234 | retval = 0; | |
235 | break; | |
236 | } | |
237 | if (val < 1 || val > 65535) | |
238 | { | |
239 | error(linenum, | |
240 | "Port numbers must be in the range 1..65535"); | |
241 | retval = 0; | |
242 | break; | |
243 | } | |
244 | *(int *) d->params[i].ptr = val; | |
245 | break; | |
246 | case PARAM_STRING: | |
247 | /* if (reload && *(char **)d->params[i].ptr) | |
248 | free(*(char **)d->params[i].ptr); */ | |
249 | *(char **) d->params[i].ptr = strdup(av[optind++]); | |
250 | if (!d->params[i].ptr) | |
251 | { | |
252 | error(linenum, "%s: Out of memory", d->name); | |
253 | return 0; | |
254 | } | |
255 | break; | |
256 | case PARAM_TIME: | |
257 | val = dotime(av[optind++]); | |
258 | if (val < 0) | |
259 | { | |
260 | error(linenum, | |
261 | "%s: Expected a time value for parameter %d", | |
262 | d->name, optind); | |
263 | retval = 0; | |
264 | break; | |
265 | } | |
266 | *(int *) d->params[i].ptr = val; | |
267 | break; | |
268 | default: | |
269 | error(linenum, "%s: Unknown type %d for param %d", | |
270 | d->name, d->params[i].type, i + 1); | |
271 | return 0; /* don't bother continuing--something's bizarre */ | |
272 | } | |
273 | } | |
274 | break; /* because we found a match */ | |
275 | } | |
276 | ||
277 | if (n == lenof(directives)) | |
278 | { | |
279 | error(linenum, "Unknown directive `%s'", dir); | |
280 | return 1; /* don't cause abort */ | |
281 | } | |
282 | ||
283 | return retval; | |
284 | } | |
285 | ||
286 | /*************************************************************************/ | |
287 | ||
288 | #define CHECK(v) do { \ | |
289 | if (!v) { \ | |
290 | error(0, #v " missing"); \ | |
291 | retval = 0; \ | |
292 | } \ | |
293 | } while (0) | |
294 | ||
295 | #define CHEK2(v,n) do { \ | |
296 | if (!v) { \ | |
297 | error(0, #n " missing"); \ | |
298 | retval = 0; \ | |
299 | } \ | |
300 | } while (0) | |
301 | ||
302 | /* Read the entire configuration file. If an error occurs while reading | |
303 | * the file or a required directive is not found, print and log an | |
304 | * appropriate error message and return 0; otherwise, return 1. | |
305 | * | |
306 | * If reload is 1, will reload the configuration file. | |
307 | * --lara | |
308 | * | |
309 | */ | |
310 | ||
311 | int read_config(void) | |
312 | { | |
313 | FILE *config; | |
314 | int linenum = 0, retval = 1; | |
315 | char buf[1024]; | |
316 | config = fopen(THALES_CONF, "r"); | |
317 | if (!config) | |
318 | { | |
319 | mylog_perror("Can't open " THALES_CONF); | |
320 | if (!debug && isatty(2)) | |
321 | perror("Can't open " THALES_CONF); | |
322 | else | |
323 | mylog("Can't open %s", THALES_CONF); | |
324 | return 0; | |
325 | } | |
326 | while (fgets(buf, sizeof(buf), config)) | |
327 | { | |
328 | linenum++; | |
329 | if (*buf == '#' || *buf == '\r' || *buf == '\n') | |
330 | continue; | |
331 | if (!parse(buf, linenum, 0)) | |
332 | retval = 0; | |
333 | } | |
334 | fclose(config); | |
335 | ||
336 | CHECK(RemoteServer); | |
337 | CHECK(ServerName); | |
338 | CHECK(ServerDesc); | |
339 | CHEK2(PIDFilename, PIDFile); | |
340 | return retval; | |
341 | } |