dirplex: Start children in the directory in which they were declared.
[ashd.git] / src / dirplex / conf.c
CommitLineData
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1/*
2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more 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#include <stdlib.h>
20#include <stdio.h>
992ce9ef 21#include <unistd.h>
600a1ce7 22#include <string.h>
992ce9ef 23#include <errno.h>
992ce9ef 24#include <fnmatch.h>
600a1ce7 25#include <sys/stat.h>
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26
27#ifdef HAVE_CONFIG_H
28#include <config.h>
29#endif
30#include <utils.h>
992ce9ef 31#include <log.h>
06c1a718 32#include <cf.h>
992ce9ef 33
600a1ce7 34#include "dirplex.h"
992ce9ef 35
0fc6fd13 36static struct config *cflist;
600a1ce7 37struct config *gconfig, *lconfig;
992ce9ef 38
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39static void freerule(struct rule *rule)
40{
41 freeca(rule->patterns);
42 free(rule);
43}
44
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45static void freepattern(struct pattern *pat)
46{
47 struct rule **rule;
48
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49 for(rule = pat->rules; *rule; rule++)
50 freerule(*rule);
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51 if(pat->childnm != NULL)
52 free(pat->childnm);
624f637d 53 freeca(pat->fchild);
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54 free(pat);
55}
56
57static void freeconfig(struct config *cf)
58{
59 struct child *ch, *nch;
60 struct pattern *pat, *npat;
61
62 if(cf->prev != NULL)
63 cf->prev->next = cf->next;
64 if(cf->next != NULL)
65 cf->next->prev = cf->prev;
66 if(cf == cflist)
67 cflist = cf->next;
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68 if(cf->path != NULL)
69 free(cf->path);
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70 for(ch = cf->children; ch != NULL; ch = nch) {
71 nch = ch->next;
72 freechild(ch);
73 }
74 for(pat = cf->patterns; pat != NULL; pat = npat) {
75 npat = pat->next;
76 freepattern(pat);
77 }
6373daf9 78 freeca(cf->index);
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79 free(cf);
80}
81
600a1ce7 82struct child *getchild(struct config *cf, char *name)
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83{
84 struct child *ch;
85
86 for(ch = cf->children; ch; ch = ch->next) {
87 if(!strcmp(ch->name, name))
88 break;
89 }
90 return(ch);
91}
92
93static struct rule *newrule(struct pattern *pat)
94{
95 int i;
96 struct rule *rule;
97
98 for(i = 0; pat->rules[i]; i++);
99 pat->rules = srealloc(pat->rules, sizeof(*pat->rules) * (i + 2));
cceb3611 100 rule = pat->rules[i] = szmalloc(sizeof(*rule));
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101 pat->rules[i + 1] = NULL;
102 return(rule);
103}
104
105static struct pattern *newpattern(void)
106{
107 struct pattern *pat;
108
109 omalloc(pat);
110 pat->rules = szmalloc(sizeof(*pat->rules));
111 return(pat);
112}
113
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114static char **cadup(char **w)
115{
116 char **ret;
117 int i, l;
118
119 l = calen(w);
120 ret = smalloc(sizeof(*ret) * (l + 1));
121 for(i = 0; i < l; i++)
122 ret[i] = sstrdup(w[i]);
123 ret[i] = NULL;
124 return(ret);
125}
126
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127static struct pattern *parsepattern(struct cfstate *s)
128{
129 struct pattern *pat;
130 struct rule *rule;
1eba4f97 131 int sl;
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132
133 if(!strcmp(s->argv[0], "match")) {
134 s->expstart = 1;
135 pat = newpattern();
136 } else {
137 return(NULL);
138 }
139
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140 if((s->argc > 1) && !strcmp(s->argv[1], "directory"))
141 pat->type = PT_DIR;
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142 sl = s->lno;
143 while(1) {
144 getcfline(s);
145 if(!strcmp(s->argv[0], "filename")) {
146 if(s->argc < 2) {
147 flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", s->file, s->lno);
148 continue;
149 }
150 rule = newrule(pat);
151 rule->type = PAT_BASENAME;
1eba4f97 152 rule->patterns = cadup(s->argv + 1);
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153 } else if(!strcmp(s->argv[0], "pathname")) {
154 if(s->argc < 2) {
155 flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", s->file, s->lno);
156 continue;
157 }
158 rule = newrule(pat);
159 rule->type = PAT_PATHNAME;
1eba4f97 160 rule->patterns = cadup(s->argv + 1);
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161 } else if(!strcmp(s->argv[0], "all")) {
162 newrule(pat)->type = PAT_ALL;
163 } else if(!strcmp(s->argv[0], "default")) {
164 newrule(pat)->type = PAT_DEFAULT;
165 } else if(!strcmp(s->argv[0], "handler")) {
166 if(s->argc < 2) {
167 flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", s->file, s->lno);
168 continue;
169 }
170 if(pat->childnm != NULL)
171 free(pat->childnm);
172 pat->childnm = sstrdup(s->argv[1]);
624f637d 173 } else if(!strcmp(s->argv[0], "fork")) {
1eba4f97 174 pat->fchild = cadup(s->argv + 1);
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175 } else if(!strcmp(s->argv[0], "end") || !strcmp(s->argv[0], "eof")) {
176 break;
177 } else {
178 flog(LOG_WARNING, "%s:%i: unknown directive `%s' in pattern declaration", s->file, s->lno, s->argv[0]);
179 }
180 }
181
182 if(pat->rules[0] == NULL) {
183 flog(LOG_WARNING, "%s:%i: missing rules in match declaration", s->file, sl);
184 freepattern(pat);
185 return(NULL);
186 }
624f637d 187 if((pat->childnm == NULL) && (pat->fchild == NULL)) {
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188 flog(LOG_WARNING, "%s:%i: missing handler in match declaration", s->file, sl);
189 freepattern(pat);
190 return(NULL);
191 }
192 return(pat);
193}
194
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195static struct config *emptyconfig(void)
196{
197 struct config *cf;
198
199 omalloc(cf);
200 return(cf);
201}
202
600a1ce7 203struct config *readconfig(char *file)
992ce9ef 204{
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205 struct cfstate *s;
206 FILE *in;
992ce9ef 207 struct config *cf;
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208 struct child *child;
209 struct pattern *pat;
992ce9ef 210
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211 if((in = fopen(file, "r")) == NULL) {
212 flog(LOG_WARNING, "%s: %s", file, strerror(errno));
992ce9ef 213 return(NULL);
06c1a718 214 }
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215 s = mkcfparser(in, file);
216 cf = emptyconfig();
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217
218 while(1) {
219 getcfline(s);
220 if((child = parsechild(s)) != NULL) {
221 child->next = cf->children;
222 cf->children = child;
223 } else if((pat = parsepattern(s)) != NULL) {
224 pat->next = cf->patterns;
225 cf->patterns = pat;
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226 } else if(!strcmp(s->argv[0], "index-file")) {
227 freeca(cf->index);
228 cf->index = NULL;
229 if(s->argc > 1)
230 cf->index = cadup(s->argv + 1);
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231 } else if(!strcmp(s->argv[0], "eof")) {
232 break;
233 } else {
234 flog(LOG_WARNING, "%s:%i: unknown directive `%s'", s->file, s->lno, s->argv[0]);
992ce9ef 235 }
06c1a718 236 }
992ce9ef 237
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238 freecfparser(s);
239 fclose(in);
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240 return(cf);
241}
242
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243static void mergechildren(struct config *dst, struct config *src)
244{
245 struct child *ch1, *ch2;
246
247 for(ch1 = dst->children; ch1 != NULL; ch1 = ch1->next) {
248 for(ch2 = src->children; ch2 != NULL; ch2 = ch2->next) {
249 if(!strcmp(ch1->name, ch2->name)) {
250 ch1->fd = ch2->fd;
251 ch2->fd = -1;
252 break;
253 }
254 }
255 }
256}
257
600a1ce7 258struct config *getconfig(char *path)
992ce9ef 259{
a756e349 260 struct config *cf, *ocf;
992ce9ef 261 struct stat sb;
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262 char *fn;
263 time_t mtime;
992ce9ef 264
17e55136 265 fn = sprintf3("%s/.htrc", path);
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266 for(cf = cflist; cf != NULL; cf = cf->next) {
267 if(!strcmp(cf->path, path)) {
17e55136 268 if(now - cf->lastck > 5) {
a756e349 269 if(stat(fn, &sb) || (sb.st_mtime != cf->mtime))
17e55136 270 break;
992ce9ef 271 }
17e55136 272 cf->lastck = now;
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273 return(cf);
274 }
275 }
a756e349 276 ocf = cf;
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277 if(access(fn, R_OK) || stat(fn, &sb)) {
278 cf = emptyconfig();
279 mtime = 0;
280 } else {
281 if((cf = readconfig(fn)) == NULL)
282 return(NULL);
283 mtime = sb.st_mtime;
992ce9ef 284 }
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285 if(ocf != NULL) {
286 mergechildren(cf, ocf);
287 freeconfig(ocf);
288 }
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289 cf->path = sstrdup(path);
290 cf->mtime = mtime;
291 cf->lastck = now;
292 cf->next = cflist;
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293 cf->prev = NULL;
294 if(cflist != NULL)
295 cflist->prev = cf;
17e55136 296 cflist = cf;
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297 return(cf);
298}
299
600a1ce7 300struct config **getconfigs(char *file)
992ce9ef 301{
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302 static struct config **ret = NULL;
303 struct {
304 struct config **b;
305 size_t s, d;
306 } buf;
992ce9ef 307 struct config *cf;
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308 char *tmp, *p;
309
310 if(ret != NULL)
311 free(ret);
312 bufinit(buf);
313 tmp = sstrdup(file);
992ce9ef 314 while(1) {
8dce6d19 315 if((p = strrchr(tmp, '/')) == NULL)
992ce9ef 316 break;
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317 *p = 0;
318 if((cf = getconfig(tmp)) != NULL)
319 bufadd(buf, cf);
320 }
321 free(tmp);
322 if((cf = getconfig(".")) != NULL)
323 bufadd(buf, cf);
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324 if(lconfig != NULL)
325 bufadd(buf, lconfig);
326 if(gconfig != NULL)
327 bufadd(buf, gconfig);
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328 bufadd(buf, NULL);
329 return(ret = buf.b);
330}
331
da75c835 332struct child *findchild(char *file, char *name, struct config **cf)
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333{
334 int i;
335 struct config **cfs;
336 struct child *ch;
337
338 cfs = getconfigs(file);
339 for(i = 0; cfs[i] != NULL; i++) {
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340 if((ch = getchild(cfs[i], name)) != NULL) {
341 if(cf != NULL)
342 *cf = cfs[i];
343 return(ch);
344 }
992ce9ef 345 }
da75c835 346 return(NULL);
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347}
348
600a1ce7 349struct pattern *findmatch(char *file, int trydefault, int dir)
992ce9ef 350{
1eba4f97 351 int i, o, c;
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352 char *bn;
353 struct config **cfs;
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354 struct pattern *pat;
355 struct rule *rule;
356
357 if((bn = strrchr(file, '/')) != NULL)
358 bn++;
359 else
360 bn = file;
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361 cfs = getconfigs(file);
362 for(c = 0; cfs[c] != NULL; c++) {
363 for(pat = cfs[c]->patterns; pat != NULL; pat = pat->next) {
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364 if(!dir && (pat->type == PT_DIR))
365 continue;
366 if(dir && (pat->type != PT_DIR))
367 continue;
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368 for(i = 0; (rule = pat->rules[i]) != NULL; i++) {
369 if(rule->type == PAT_BASENAME) {
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370 for(o = 0; rule->patterns[o] != NULL; o++) {
371 if(!fnmatch(rule->patterns[o], bn, 0))
372 break;
373 }
374 if(rule->patterns[o] == NULL)
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375 break;
376 } else if(rule->type == PAT_PATHNAME) {
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377 for(o = 0; rule->patterns[o] != NULL; o++) {
378 if(!fnmatch(rule->patterns[o], file, FNM_PATHNAME))
379 break;
380 }
381 if(rule->patterns[o] == NULL)
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382 break;
383 } else if(rule->type == PAT_ALL) {
384 } else if(rule->type == PAT_DEFAULT) {
385 if(!trydefault)
386 break;
387 }
388 }
389 if(!rule)
8dce6d19 390 return(pat);
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391 }
392 }
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393 if(!trydefault)
394 return(findmatch(file, 1, dir));
8dce6d19 395 return(NULL);
992ce9ef 396}