Commit | Line | Data |
---|---|---|
2fe58dfd SE |
1 | /* conffile.c - process the configuration file */ |
2 | ||
3 | /* #define DUMP_PARSE_TREE */ | |
4 | ||
8689b3a9 | 5 | #include "secnet.h" |
2fe58dfd | 6 | #include <stdio.h> |
2fe58dfd | 7 | #include <string.h> |
2fe58dfd SE |
8 | #include "conffile.h" |
9 | #include "conffile_internal.h" | |
10 | #include "util.h" | |
7138d0c5 SE |
11 | #include "ipaddr.h" |
12 | ||
13 | /* from modules.c */ | |
14 | extern void init_builtin_modules(dict_t *dict); | |
2fe58dfd SE |
15 | |
16 | static struct cloc no_loc={"none",0}; | |
17 | ||
18 | struct atomlist { | |
19 | struct atomlist *next; | |
20 | atom_t a; | |
21 | }; | |
22 | ||
23 | struct entry { | |
24 | struct entry *next; | |
25 | atom_t key; | |
26 | list_t *val; | |
27 | }; | |
28 | ||
29 | struct searchlist { | |
30 | struct dict *d; | |
31 | struct searchlist *next; | |
32 | }; | |
33 | ||
34 | struct dict { | |
35 | struct dict *parent; | |
36 | struct searchlist *search; | |
37 | struct entry *entries; | |
38 | uint32_t size; | |
39 | }; | |
40 | ||
41 | static struct atomlist *atoms=NULL; | |
42 | ||
43 | static void process_alist(dict_t *context, struct p_node *c); | |
44 | static list_t *process_invocation(dict_t *context, struct p_node *i); | |
45 | ||
46 | static list_t *dict_ilookup_primitive(dict_t *dict, atom_t key) | |
47 | { | |
48 | struct entry *i; | |
49 | for (i=dict->entries; i; i=i->next) { | |
50 | if (key==i->key) return i->val; | |
51 | } | |
52 | return NULL; | |
53 | } | |
54 | ||
55 | static list_t *dict_ilookup(dict_t *dict, atom_t key) | |
56 | { | |
57 | dict_t *d; | |
58 | list_t *v; | |
59 | ||
60 | v=dict_ilookup_primitive(dict, key); | |
61 | if (v) return v; | |
62 | /* Check dictionaries in search path */ | |
63 | /* XXX */ | |
64 | /* Check lexical parents */ | |
65 | for (d=dict; d; d=d->parent) { | |
66 | v=dict_ilookup_primitive(d, key); | |
67 | if (v) return v; | |
68 | } | |
69 | return NULL; | |
70 | } | |
71 | ||
72 | static void dict_iadd(dict_t *dict, atom_t key, list_t *val) | |
73 | { | |
74 | struct entry *e; | |
2fe58dfd | 75 | if (dict_ilookup_primitive(dict, key)) { |
4f5e39ec | 76 | fatal("duplicate key \"%s\" in dictionary",key); |
2fe58dfd SE |
77 | } |
78 | e=safe_malloc(sizeof(*e),"dict_add"); | |
79 | e->next=dict->entries; | |
80 | e->key=key; | |
81 | e->val=val; | |
82 | dict->entries=e; | |
83 | dict->size++; | |
84 | } | |
85 | ||
86 | /***** Functions beyond this point are private to the config system *****/ | |
87 | ||
88 | static dict_t *dict_new(dict_t *parent) | |
89 | { | |
90 | dict_t *d; | |
91 | ||
92 | d=safe_malloc(sizeof(*d),"dict_new"); | |
93 | d->parent=parent; | |
94 | d->search=NULL; | |
95 | d->entries=NULL; | |
96 | d->size=0; | |
97 | return d; | |
98 | } | |
99 | ||
100 | static struct p_node *node_copy(struct p_node *n) | |
101 | { | |
102 | struct p_node *r; | |
103 | r=safe_malloc(sizeof(*r),"node_copy"); | |
104 | *r=*n; | |
105 | return r; | |
106 | } | |
107 | ||
108 | static struct p_node *list_reverse(struct p_node *list) | |
109 | { | |
110 | struct p_node *rl=NULL, *i, *n; | |
111 | ||
112 | for (i=list; i; i=i->r) { | |
113 | n=node_copy(i); | |
114 | n->r=rl; | |
115 | rl=n; | |
116 | } | |
117 | return rl; | |
118 | } | |
119 | ||
120 | /* Since we use left-recursion in the parser for efficiency, sequences | |
121 | end up "backwards" in the parse tree. Rather than have complicated | |
122 | code for, eg. processing assignments in the right order, we reverse | |
123 | these sequences here. */ | |
124 | static void ptree_mangle(struct p_node *t) | |
125 | { | |
126 | if (!t) return; | |
127 | ptree_mangle(t->l); | |
128 | ptree_mangle(t->r); | |
129 | switch (t->type) { | |
130 | case T_DICT: | |
4f5e39ec SE |
131 | ASSERT(!t->l || t->l->type==T_ALIST); |
132 | ASSERT(!t->r || t->r->type==T_LISTITEM); | |
2fe58dfd SE |
133 | t->l=list_reverse(t->l); |
134 | t->r=list_reverse(t->r); | |
135 | break; | |
136 | case T_ASSIGNMENT: | |
4f5e39ec SE |
137 | ASSERT(t->l->type==T_KEY); |
138 | ASSERT(t->r->type==T_LISTITEM); | |
2fe58dfd SE |
139 | t->r=list_reverse(t->r); |
140 | break; | |
141 | case T_ABSPATH: | |
142 | case T_RELPATH: | |
4f5e39ec SE |
143 | ASSERT(t->l==NULL); |
144 | ASSERT(t->r->type==T_PATHELEM); | |
2fe58dfd SE |
145 | t->r=list_reverse(t->r); |
146 | break; | |
147 | case T_EXEC: | |
4f5e39ec SE |
148 | ASSERT(t->l); |
149 | ASSERT(t->r==NULL || t->r->type==T_LISTITEM); | |
2fe58dfd SE |
150 | t->r=list_reverse(t->r); |
151 | break; | |
152 | } | |
153 | } | |
154 | ||
155 | #ifdef DUMP_PARSE_TREE | |
156 | /* Convert a node type to a string, for parse tree dump */ | |
157 | static string_t ntype(uint32_t type) | |
158 | { | |
159 | switch(type) { | |
160 | case T_STRING: return "T_STRING"; | |
161 | case T_NUMBER: return "T_NUMBER"; | |
162 | case T_KEY: return "T_KEY"; | |
163 | case T_ASSIGNMENT: return "T_ASSIGNMENT"; | |
164 | case T_LISTITEM: return "T_LISTITEM"; | |
165 | case T_EXEC: return "T_EXEC"; | |
166 | case T_PATHELEM: return "T_PATHELEM"; | |
167 | case T_ABSPATH: return "T_ABSPATH"; | |
168 | case T_RELPATH: return "T_RELPATH"; | |
169 | case T_DICT: return "T_DICT"; | |
170 | case T_ALIST: return "T_ALIST"; | |
171 | case T_ERROR: return "T_ERROR"; | |
172 | } | |
173 | return "**unknown**"; | |
174 | } | |
175 | ||
176 | static void ptree_indent(uint32_t amount) | |
177 | { | |
178 | uint32_t i; | |
179 | for (i=0; i<amount; i++) printf(" . "); | |
180 | } | |
181 | ||
182 | static void ptree_dump(struct p_node *n, uint32_t d) | |
183 | { | |
184 | if (!n) { | |
185 | printf("NULL\n"); | |
186 | return; | |
187 | } | |
188 | ||
189 | if (n->type<10) { | |
190 | switch(n->type) { | |
191 | case T_STRING: printf("T_STRING: \"%s\" (%s line %d)\n", | |
192 | n->data.string,n->loc.file,n->loc.line); break; | |
193 | case T_NUMBER: printf("T_NUMBER: %d (%s line %d)\n", | |
194 | n->data.number, n->loc.file,n->loc.line); break; | |
195 | case T_KEY: printf("T_KEY: %s (%s line %d)\n", | |
196 | n->data.key, n->loc.file,n->loc.line); break; | |
197 | default: printf("**unknown primitive type**\n"); break; | |
198 | } | |
199 | } else { | |
200 | printf("%s: (%s line %d)\n",ntype(n->type),n->loc.file,n->loc.line); | |
201 | ptree_indent(d); | |
202 | printf(" |-"); ptree_dump(n->l, d+1); | |
203 | ptree_indent(d); | |
204 | printf(" +-"); ptree_dump(n->r, d+1); | |
205 | } | |
206 | } | |
207 | ||
208 | #endif /* DUMP_PARSE_TREE */ | |
209 | ||
210 | static dict_t *dict_find_root(dict_t *d) | |
211 | { | |
212 | dict_t *i; | |
213 | ||
214 | for (i=d; i->parent; i=i->parent); | |
215 | return i; | |
216 | } | |
217 | ||
218 | static list_t *dict_lookup_path(dict_t *context, struct p_node *p) | |
219 | { | |
220 | dict_t *i; | |
221 | list_t *l; | |
222 | ||
4f5e39ec SE |
223 | ASSERT(p->type==T_PATHELEM); |
224 | ASSERT(p->l->type==T_KEY); | |
2fe58dfd SE |
225 | l=dict_ilookup(context, p->l->data.key); |
226 | if (!l) { | |
227 | cfgfatal(p->loc,"conffile","can't find key %s\n", | |
228 | p->l->data.key); | |
229 | } | |
230 | ||
231 | while (p->r) { | |
232 | if (l->item->type != t_dict) { | |
233 | cfgfatal(p->loc,"conffile","path element \"%s\" " | |
234 | "is not a dictionary\n",p->l->data.key); | |
235 | } | |
236 | i=l->item->data.dict; /* First thing in list */ | |
237 | ||
238 | p=p->r; | |
239 | l=dict_ilookup_primitive(i, p->l->data.key); | |
240 | if (!l) { | |
241 | cfgfatal(p->loc,"conffile","can't find key %s\n", | |
242 | p->l->data.key); | |
243 | } | |
244 | } | |
245 | return l; | |
246 | } | |
247 | ||
248 | static item_t *new_item(enum types type, struct cloc loc) | |
249 | { | |
250 | item_t *i; | |
251 | ||
252 | i=safe_malloc(sizeof(*i),"new_item"); | |
253 | i->type=type; | |
254 | i->loc=loc; | |
255 | return i; | |
256 | } | |
257 | ||
258 | static list_t *process_item(dict_t *context, struct p_node *i) | |
259 | { | |
260 | item_t *item=NULL; | |
261 | ||
262 | switch (i->type) { | |
263 | case T_STRING: | |
264 | item=new_item(t_string, i->loc); | |
265 | item->data.string=i->data.string; /* XXX maybe strcpy */ | |
266 | break; | |
267 | case T_NUMBER: | |
268 | item=new_item(t_number, i->loc); | |
269 | item->data.number=i->data.number; | |
270 | break; | |
271 | case T_ABSPATH: | |
272 | context=dict_find_root(context); | |
273 | /* falls through */ | |
274 | case T_RELPATH: | |
275 | return dict_lookup_path(context, i->r); | |
276 | /* returns immediately */ | |
277 | break; | |
278 | case T_DICT: | |
279 | item=new_item(t_dict, i->loc); | |
280 | item->data.dict=dict_new(context); | |
281 | /* XXX dict_add_searchpath(context,process_ilist(context, i->r)); */ | |
282 | process_alist(item->data.dict, i->l); | |
283 | break; | |
284 | case T_EXEC: | |
285 | return process_invocation(context, i); | |
286 | /* returns immediately */ | |
287 | break; | |
288 | default: | |
289 | #ifdef DUMP_PARSE_TREE | |
290 | ptree_dump(i,0); | |
4f5e39ec | 291 | fatal("process_item: invalid node type for a list item (%s)", |
2fe58dfd SE |
292 | ntype(i->type)); |
293 | #else | |
294 | fatal("process_item: list item has invalid node type %d - recompile " | |
295 | "with DUMP_PARSE_TREE defined in conffile.c for more " | |
296 | "detailed debug output",i->type); | |
297 | #endif /* DUMP_PARSE_TREE */ | |
298 | break; | |
299 | } | |
300 | return list_append(NULL,item); | |
301 | } | |
302 | ||
303 | static list_t *process_ilist(dict_t *context, struct p_node *l) | |
304 | { | |
305 | struct p_node *i; | |
306 | list_t *r; | |
307 | ||
4f5e39ec | 308 | ASSERT(!l || l->type==T_LISTITEM); |
2fe58dfd SE |
309 | |
310 | r=list_new(); | |
311 | ||
312 | for (i=l; i; i=i->r) { | |
313 | r=list_append_list(r,process_item(context,i->l)); | |
314 | } | |
315 | return r; | |
316 | } | |
317 | ||
318 | static list_t *process_invocation(dict_t *context, struct p_node *i) | |
319 | { | |
320 | list_t *cll; | |
321 | item_t *cl; | |
322 | list_t *args; | |
323 | ||
4f5e39ec SE |
324 | ASSERT(i->type==T_EXEC); |
325 | ASSERT(i->r==NULL || i->r->type==T_LISTITEM); | |
2fe58dfd SE |
326 | cll=process_item(context,i->l); |
327 | cl=cll->item; | |
328 | if (cl->type != t_closure) { | |
329 | cfgfatal(i->l->loc,"conffile","only closures can be invoked\n"); | |
330 | } | |
469fd1d9 SE |
331 | if (!cl->data.closure->apply) { |
332 | cfgfatal(i->l->loc,"conffile","this closure cannot be invoked\n"); | |
333 | } | |
2fe58dfd SE |
334 | args=process_ilist(context, i->r); |
335 | return cl->data.closure->apply(cl->data.closure, i->loc, context, args); | |
336 | } | |
337 | ||
338 | static void process_alist(dict_t *context, struct p_node *c) | |
339 | { | |
340 | struct p_node *i; | |
341 | atom_t k; | |
342 | list_t *l; | |
343 | ||
344 | if (!c) return; /* NULL assignment lists are valid (empty dictionary) */ | |
345 | ||
4f5e39ec | 346 | ASSERT(c->type==T_ALIST); |
2fe58dfd | 347 | if (c->type!=T_ALIST) { |
4f5e39ec | 348 | fatal("invalid node type in assignment list"); |
2fe58dfd SE |
349 | } |
350 | ||
351 | for (i=c; i; i=i->r) { | |
4f5e39ec SE |
352 | ASSERT(i->l && i->l->type==T_ASSIGNMENT); |
353 | ASSERT(i->l->l->type==T_KEY); | |
354 | ASSERT(i->l->r->type==T_LISTITEM); | |
2fe58dfd SE |
355 | k=i->l->l->data.key; |
356 | l=process_ilist(context, i->l->r); | |
357 | dict_iadd(context, k, l); | |
358 | } | |
359 | } | |
360 | ||
361 | /* Take a list of items; turn any dictionaries in this list into lists */ | |
362 | static list_t *makelist(closure_t *self, struct cloc loc, | |
363 | dict_t *context, list_t *args) | |
364 | { | |
365 | list_t *r=NULL, *i; | |
366 | struct entry *e; | |
367 | ||
368 | for (i=args; i; i=i->next) { | |
369 | if (i->item->type==t_dict) { | |
370 | /* Convert */ | |
371 | for (e=i->item->data.dict->entries; e; e=e->next) { | |
372 | r=list_append_list(r, e->val); | |
373 | } | |
374 | } else { | |
375 | r=list_append_list(r, list_append(NULL,i->item)); | |
376 | } | |
377 | } | |
378 | return r; | |
379 | } | |
380 | ||
9d3a4132 SE |
381 | /* Take a list consisting of a closure and some other things. Apply the |
382 | closure to the other things, and return the resulting list */ | |
383 | static list_t *map(closure_t *self, struct cloc loc, dict_t *context, | |
384 | list_t *args) | |
385 | { | |
386 | list_t *r=NULL, *al; | |
387 | item_t *ci; | |
388 | closure_t *cl; | |
389 | list_t se; | |
390 | ||
391 | ci=list_elem(args,0); | |
392 | if (ci && ci->type==t_closure) { | |
393 | cl=ci->data.closure; | |
394 | if (!cl->apply) { | |
395 | cfgfatal(loc,"map","closure cannot be applied\n"); | |
396 | } | |
397 | for (al=args->next; al; al=al->next) { | |
398 | /* Construct a single-element list */ | |
399 | se.next=NULL; | |
400 | se.item=al->item; | |
401 | /* Invoke the closure, append its result to the output */ | |
402 | r=list_append_list(r,cl->apply(cl,loc,context,&se)); | |
403 | } | |
404 | } else { | |
405 | cfgfatal(loc,"map","you must supply a closure as the " | |
406 | "first argument\n"); | |
407 | } | |
408 | return r; | |
409 | } | |
410 | ||
2fe58dfd SE |
411 | /* Read a file and turn it into a string */ |
412 | static list_t *readfile(closure_t *self, struct cloc loc, | |
413 | dict_t *context, list_t *args) | |
414 | { | |
415 | FILE *f; | |
416 | string_t filename; | |
417 | long length; | |
418 | item_t *r; | |
419 | ||
420 | r=list_elem(args,0); | |
421 | if (!r) { | |
422 | cfgfatal(loc,"readfile","you must supply a filename\n"); | |
423 | } | |
424 | if (r->type!=t_string) { | |
425 | cfgfatal(loc,"readfile","filename must be a string\n"); | |
426 | } | |
427 | filename=r->data.string; | |
428 | f=fopen(filename,"rb"); | |
429 | if (!f) { | |
430 | fatal_perror("readfile (%s:%d): cannot open file \"%s\"", | |
431 | loc.file,loc.line, filename); | |
432 | } | |
433 | if (fseek(f, 0, SEEK_END)!=0) { | |
434 | fatal_perror("readfile (%s:%d): fseek(SEEK_END)",loc.file,loc.line); | |
435 | } | |
436 | length=ftell(f); | |
437 | if (length<0) { | |
438 | fatal_perror("readfile (%s:%d): ftell()",loc.file,loc.line); | |
439 | } | |
440 | if (fseek(f, 0, SEEK_SET)!=0) { | |
441 | fatal_perror("readfile (%s:%d): fseek(SEEK_SET)",loc.file,loc.line); | |
442 | } | |
443 | r=new_item(t_string,loc); | |
444 | r->data.string=safe_malloc(length+1,"readfile"); | |
445 | if (fread(r->data.string,length,1,f)!=1) { | |
4f5e39ec SE |
446 | (ferror(f) ? fatal_perror : fatal) |
447 | ("readfile (%s:%d): fread: could not read all of file", | |
448 | loc.file,loc.line); | |
2fe58dfd SE |
449 | } |
450 | r->data.string[length]=0; | |
451 | if (fclose(f)!=0) { | |
452 | fatal_perror("readfile (%s:%d): fclose",loc.file,loc.line); | |
453 | } | |
454 | return list_append(NULL,r); | |
455 | } | |
456 | ||
457 | static dict_t *process_config(struct p_node *c) | |
458 | { | |
459 | dict_t *root; | |
460 | dict_t *context; | |
461 | item_t *i; | |
462 | list_t *false; | |
463 | list_t *true; | |
464 | ||
465 | root=dict_new(NULL); | |
466 | context=root; | |
467 | ||
468 | /* Predefined keys for boolean values */ | |
3b83c932 SE |
469 | /* "nowise" and "verily" have the advantage of being the same |
470 | length, so they line up nicely... thanks VKC and SGT (who also | |
471 | point out that "mayhap" is a good "maybe" value as well) */ | |
2fe58dfd SE |
472 | i=new_item(t_bool,no_loc); |
473 | i->data.bool=False; | |
474 | false=list_append(NULL,i); | |
475 | i=new_item(t_bool,no_loc); | |
476 | i->data.bool=True; | |
477 | true=list_append(NULL,i); | |
478 | dict_add(root,"false",false); | |
479 | dict_add(root,"False",false); | |
480 | dict_add(root,"FALSE",false); | |
481 | dict_add(root,"no",false); | |
482 | dict_add(root,"No",false); | |
483 | dict_add(root,"NO",false); | |
3b83c932 SE |
484 | dict_add(root,"nowise",false); |
485 | dict_add(root,"Nowise",false); | |
486 | dict_add(root,"NOWISE",false); | |
2fe58dfd SE |
487 | dict_add(root,"true",true); |
488 | dict_add(root,"True",true); | |
489 | dict_add(root,"TRUE",true); | |
490 | dict_add(root,"yes",true); | |
491 | dict_add(root,"Yes",true); | |
492 | dict_add(root,"YES",true); | |
3b83c932 SE |
493 | dict_add(root,"verily",true); |
494 | dict_add(root,"Verily",true); | |
495 | dict_add(root,"VERILY",true); | |
2fe58dfd SE |
496 | |
497 | add_closure(root,"makelist",makelist); | |
498 | add_closure(root,"readfile",readfile); | |
9d3a4132 | 499 | add_closure(root,"map",map); |
2fe58dfd SE |
500 | |
501 | init_builtin_modules(root); | |
502 | ||
503 | process_alist(context, c); | |
504 | ||
505 | return root; | |
506 | } | |
507 | ||
508 | /***** Externally accessible functions */ | |
509 | ||
fe5e9cc4 | 510 | atom_t intern(cstring_t s) |
2fe58dfd SE |
511 | { |
512 | struct atomlist *i; | |
513 | ||
514 | for (i=atoms; i; i=i->next) { | |
515 | if (strcmp(i->a, s)==0) break; | |
516 | } | |
517 | ||
518 | if (!i) { | |
519 | /* Did't find it; create a new one */ | |
520 | i=safe_malloc(sizeof(*i),"intern: alloc list entry"); | |
521 | i->a=safe_strdup(s,"intern: alloc string"); | |
522 | i->next=atoms; | |
523 | atoms=i; | |
524 | } | |
525 | return i->a; | |
526 | } | |
527 | ||
fe5e9cc4 | 528 | list_t *dict_lookup(dict_t *dict, cstring_t key) |
2fe58dfd SE |
529 | { |
530 | return dict_ilookup(dict, intern(key)); | |
531 | } | |
532 | ||
fe5e9cc4 | 533 | list_t *dict_lookup_primitive(dict_t *dict, cstring_t key) |
2fe58dfd SE |
534 | { |
535 | return dict_ilookup_primitive(dict, intern(key)); | |
536 | } | |
537 | ||
fe5e9cc4 | 538 | void dict_add(dict_t *dict, cstring_t key, list_t *val) |
2fe58dfd SE |
539 | { |
540 | dict_iadd(dict,intern(key),val); | |
541 | } | |
542 | ||
fe5e9cc4 | 543 | cstring_t *dict_keys(dict_t *dict) |
2fe58dfd SE |
544 | { |
545 | atom_t *r, *j; | |
546 | struct entry *i; | |
547 | r=safe_malloc(sizeof(*r)*(dict->size+1),"dict_keys"); | |
548 | for (i=dict->entries, j=r; i; i=i->next, j++) { | |
549 | *j=i->key; | |
550 | } | |
551 | *j=NULL; | |
552 | return r; | |
553 | } | |
554 | ||
555 | ||
556 | /* List-related functions */ | |
557 | ||
558 | list_t *list_new(void) | |
559 | { | |
560 | return NULL; | |
561 | } | |
562 | ||
b2a56f7c SE |
563 | uint32_t list_length(list_t *a) |
564 | { | |
565 | uint32_t l=0; | |
566 | list_t *i; | |
567 | for (i=a; i; i=i->next) l++; | |
568 | return l; | |
569 | } | |
570 | ||
3454dce4 SE |
571 | list_t *list_copy(list_t *a) |
572 | { | |
573 | list_t *r, *i, *b, *l; | |
574 | ||
575 | if (!a) return NULL; | |
576 | l=NULL; | |
577 | r=NULL; | |
578 | for (i=a; i; i=i->next) { | |
579 | b=safe_malloc(sizeof(*b),"list_copy"); | |
580 | if (l) l->next=b; else r=b; | |
581 | l=b; | |
582 | b->item=i->item; | |
583 | b->next=NULL; | |
584 | } | |
585 | return r; | |
586 | } | |
587 | ||
2fe58dfd SE |
588 | list_t *list_append_list(list_t *a, list_t *b) |
589 | { | |
590 | list_t *i; | |
591 | ||
3454dce4 | 592 | b=list_copy(b); |
2fe58dfd SE |
593 | if (!a) return b; |
594 | for (i=a; i->next; i=i->next); | |
595 | i->next=b; | |
596 | return a; | |
597 | } | |
598 | ||
599 | list_t *list_append(list_t *list, item_t *item) | |
600 | { | |
601 | list_t *l; | |
602 | ||
603 | l=safe_malloc(sizeof(*l),"list_append"); | |
604 | l->item=item; | |
605 | l->next=NULL; | |
606 | ||
607 | return list_append_list(list,l); | |
608 | } | |
609 | ||
610 | item_t *list_elem(list_t *l, uint32_t index) | |
611 | { | |
612 | if (!l) return NULL; | |
613 | if (index==0) return l->item; | |
614 | return list_elem(l->next, index-1); | |
615 | } | |
616 | ||
617 | list_t *new_closure(closure_t *cl) | |
618 | { | |
619 | item_t *i; | |
620 | ||
621 | i=new_item(t_closure,no_loc); | |
622 | i->data.closure=cl; | |
623 | return list_append(NULL,i); | |
624 | } | |
625 | ||
fe5e9cc4 | 626 | void add_closure(dict_t *dict, cstring_t name, apply_fn apply) |
2fe58dfd SE |
627 | { |
628 | closure_t *c; | |
629 | c=safe_malloc(sizeof(*c),"add_closure"); | |
630 | c->description=name; | |
3b83c932 | 631 | c->type=CL_PURE; |
2fe58dfd SE |
632 | c->apply=apply; |
633 | c->interface=NULL; | |
634 | ||
635 | dict_add(dict,name,new_closure(c)); | |
636 | } | |
637 | ||
fe5e9cc4 SE |
638 | void *find_cl_if(dict_t *dict, cstring_t name, uint32_t type, |
639 | bool_t fail_if_invalid, cstring_t desc, struct cloc loc) | |
2fe58dfd SE |
640 | { |
641 | list_t *l; | |
642 | item_t *i; | |
643 | closure_t *cl; | |
644 | ||
645 | l=dict_lookup(dict,name); | |
646 | if (!l) { | |
647 | if (!fail_if_invalid) return NULL; | |
648 | cfgfatal(loc,desc,"closure \"%s\" not found\n",name); | |
649 | } | |
650 | i=list_elem(l,0); | |
651 | if (i->type!=t_closure) { | |
652 | if (!fail_if_invalid) return NULL; | |
653 | cfgfatal(loc,desc,"\"%s\" must be a closure\n",name); | |
654 | } | |
655 | cl=i->data.closure; | |
656 | if (cl->type!=type) { | |
657 | if (!fail_if_invalid) return NULL; | |
658 | cfgfatal(loc,desc,"\"%s\" is the wrong type of closure\n",name); | |
659 | } | |
660 | return cl->interface; | |
661 | } | |
662 | ||
663 | /* Convenience functions for modules reading configuration dictionaries */ | |
fe5e9cc4 SE |
664 | item_t *dict_find_item(dict_t *dict, cstring_t key, bool_t required, |
665 | cstring_t desc, struct cloc loc) | |
2fe58dfd SE |
666 | { |
667 | list_t *l; | |
668 | item_t *i; | |
669 | ||
670 | l=dict_lookup(dict,key); | |
671 | if (!l) { | |
672 | if (!required) return NULL; | |
673 | cfgfatal(loc,desc,"required parameter \"%s\" not found\n",key); | |
674 | } | |
675 | i=list_elem(l,0); | |
676 | return i; | |
677 | } | |
678 | ||
fe5e9cc4 SE |
679 | string_t dict_read_string(dict_t *dict, cstring_t key, bool_t required, |
680 | cstring_t desc, struct cloc loc) | |
2fe58dfd SE |
681 | { |
682 | item_t *i; | |
683 | string_t r; | |
684 | ||
685 | i=dict_find_item(dict,key,required,desc,loc); | |
686 | if (!i) return NULL; | |
687 | if (i->type!=t_string) { | |
688 | cfgfatal(loc,desc,"\"%s\" must be a string\n",key); | |
689 | } | |
690 | r=i->data.string; | |
691 | return r; | |
692 | } | |
693 | ||
fe5e9cc4 SE |
694 | uint32_t dict_read_number(dict_t *dict, cstring_t key, bool_t required, |
695 | cstring_t desc, struct cloc loc, uint32_t def) | |
2fe58dfd SE |
696 | { |
697 | item_t *i; | |
698 | uint32_t r; | |
699 | ||
700 | i=dict_find_item(dict,key,required,desc,loc); | |
701 | if (!i) return def; | |
702 | if (i->type!=t_number) { | |
703 | cfgfatal(loc,desc,"\"%s\" must be a number\n",key); | |
704 | } | |
705 | r=i->data.number; | |
706 | return r; | |
707 | } | |
708 | ||
fe5e9cc4 SE |
709 | bool_t dict_read_bool(dict_t *dict, cstring_t key, bool_t required, |
710 | cstring_t desc, struct cloc loc, bool_t def) | |
2fe58dfd SE |
711 | { |
712 | item_t *i; | |
713 | bool_t r; | |
714 | ||
715 | i=dict_find_item(dict,key,required,desc,loc); | |
716 | if (!i) return def; | |
717 | if (i->type!=t_bool) { | |
718 | cfgfatal(loc,desc,"\"%s\" must be a boolean\n",key); | |
719 | } | |
720 | r=i->data.bool; | |
721 | return r; | |
722 | } | |
723 | ||
fe5e9cc4 SE |
724 | uint32_t string_to_word(cstring_t s, struct cloc loc, |
725 | struct flagstr *f, cstring_t desc) | |
b2a56f7c SE |
726 | { |
727 | struct flagstr *j; | |
728 | for (j=f; j->name; j++) | |
729 | if (strcmp(s,j->name)==0) | |
730 | return j->value; | |
731 | cfgfatal(loc,desc,"option \"%s\" not known\n",s); | |
732 | return 0; | |
733 | } | |
734 | ||
fe5e9cc4 | 735 | uint32_t string_list_to_word(list_t *l, struct flagstr *f, cstring_t desc) |
9d3a4132 SE |
736 | { |
737 | list_t *i; | |
738 | uint32_t r=0; | |
739 | struct flagstr *j; | |
740 | ||
741 | for (i=l; i; i=i->next) { | |
742 | if (i->item->type!=t_string) { | |
743 | cfgfatal(i->item->loc,desc,"all elements of list must be " | |
744 | "strings\n"); | |
745 | } | |
746 | for (j=f; j->name; j++) | |
b2a56f7c | 747 | r|=string_to_word(i->item->data.string,i->item->loc,f,desc); |
9d3a4132 SE |
748 | } |
749 | return r; | |
750 | } | |
751 | ||
fe5e9cc4 | 752 | dict_t *read_conffile(const char *name) |
2fe58dfd SE |
753 | { |
754 | FILE *conffile; | |
755 | struct p_node *config; | |
756 | ||
757 | if (strcmp(name,"-")==0) { | |
758 | conffile=stdin; | |
759 | } else { | |
760 | conffile=fopen(name,"r"); | |
761 | if (!conffile) | |
762 | fatal_perror("Cannot open configuration file \"%s\"",name); | |
763 | } | |
764 | config_lineno=1; | |
765 | config_file=name; | |
766 | config=parse_conffile(conffile); | |
767 | fclose(conffile); | |
768 | ||
769 | #ifdef DUMP_PARSE_TREE | |
770 | printf("*** config file parse tree BEFORE MANGLE\n"); | |
771 | ptree_dump(config,0); | |
772 | #endif /* DUMP_PARSE_TREE */ | |
773 | /* The root of the configuration is a T_ALIST, which needs reversing | |
774 | before we mangle because it isn't the child of a T_DICT. */ | |
775 | config=list_reverse(config); | |
776 | ptree_mangle(config); | |
777 | #ifdef DUMP_PARSE_TREE | |
778 | printf("\n\n*** config file parse tree AFTER MANGLE\n"); | |
779 | ptree_dump(config,0); | |
780 | #endif /* DUMP_PARSE_TREE */ | |
781 | return process_config(config); | |
782 | } |