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212380e3 AC |
1 | /* |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * modules.c: A module loader. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | * | |
5366977b | 24 | * $Id: modules.c 3161 2007-01-25 07:23:01Z nenolod $ |
212380e3 AC |
25 | */ |
26 | ||
27 | #include "stdinc.h" | |
28 | ||
29 | ||
30 | #include "modules.h" | |
4016731b | 31 | #include "logger.h" |
212380e3 AC |
32 | #include "ircd.h" |
33 | #include "client.h" | |
34 | #include "send.h" | |
35 | #include "s_conf.h" | |
36 | #include "s_newconf.h" | |
37 | #include "numeric.h" | |
38 | #include "parse.h" | |
39 | #include "ircd_defs.h" | |
40 | #include "irc_string.h" | |
212380e3 AC |
41 | #include "sprintf_irc.h" |
42 | ||
43 | ||
44 | ||
45 | /* -TimeMr14C: | |
46 | * I have moved the dl* function definitions and | |
47 | * the two functions (load_a_module / unload_a_module) to the | |
48 | * file dynlink.c | |
49 | * And also made the necessary changes to those functions | |
50 | * to comply with shl_load and friends. | |
51 | * In this file, to keep consistency with the makefile, | |
52 | * I added the ability to load *.sl files, too. | |
53 | * 27/02/2002 | |
54 | */ | |
55 | ||
56 | #ifndef STATIC_MODULES | |
57 | ||
58 | struct module **modlist = NULL; | |
59 | ||
60 | static const char *core_module_table[] = { | |
61 | "m_die", | |
62 | "m_error", | |
63 | "m_join", | |
64 | "m_kick", | |
65 | "m_kill", | |
66 | "m_message", | |
67 | "m_mode", | |
68 | "m_nick", | |
69 | "m_part", | |
70 | "m_quit", | |
71 | "m_server", | |
212380e3 AC |
72 | "m_squit", |
73 | NULL | |
74 | }; | |
75 | ||
76 | #define MODS_INCREMENT 10 | |
77 | int num_mods = 0; | |
78 | int max_mods = MODS_INCREMENT; | |
79 | ||
330fc5c1 | 80 | static rb_dlink_list mod_paths; |
212380e3 AC |
81 | |
82 | static int mo_modload(struct Client *, struct Client *, int, const char **); | |
83 | static int mo_modlist(struct Client *, struct Client *, int, const char **); | |
84 | static int mo_modreload(struct Client *, struct Client *, int, const char **); | |
85 | static int mo_modunload(struct Client *, struct Client *, int, const char **); | |
86 | static int mo_modrestart(struct Client *, struct Client *, int, const char **); | |
87 | ||
88 | struct Message modload_msgtab = { | |
89 | "MODLOAD", 0, 0, 0, MFLG_SLOW, | |
90 | {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_modload, 2}} | |
91 | }; | |
92 | ||
93 | struct Message modunload_msgtab = { | |
94 | "MODUNLOAD", 0, 0, 0, MFLG_SLOW, | |
95 | {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_modunload, 2}} | |
96 | }; | |
97 | ||
98 | struct Message modreload_msgtab = { | |
99 | "MODRELOAD", 0, 0, 0, MFLG_SLOW, | |
100 | {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_modreload, 2}} | |
101 | }; | |
102 | ||
103 | struct Message modlist_msgtab = { | |
104 | "MODLIST", 0, 0, 0, MFLG_SLOW, | |
105 | {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_modlist, 0}} | |
106 | }; | |
107 | ||
108 | struct Message modrestart_msgtab = { | |
109 | "MODRESTART", 0, 0, 0, MFLG_SLOW, | |
110 | {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_modrestart, 0}} | |
111 | }; | |
112 | ||
113 | extern struct Message error_msgtab; | |
114 | ||
115 | void | |
116 | modules_init(void) | |
117 | { | |
118 | mod_add_cmd(&modload_msgtab); | |
119 | mod_add_cmd(&modunload_msgtab); | |
120 | mod_add_cmd(&modreload_msgtab); | |
121 | mod_add_cmd(&modlist_msgtab); | |
122 | mod_add_cmd(&modrestart_msgtab); | |
123 | ||
124 | /* Add the default paths we look in to the module system --nenolod */ | |
125 | mod_add_path(MODPATH); | |
126 | mod_add_path(AUTOMODPATH); | |
127 | } | |
128 | ||
129 | /* mod_find_path() | |
130 | * | |
131 | * input - path | |
132 | * output - none | |
133 | * side effects - returns a module path from path | |
134 | */ | |
135 | static struct module_path * | |
136 | mod_find_path(const char *path) | |
137 | { | |
330fc5c1 | 138 | rb_dlink_node *ptr; |
212380e3 AC |
139 | struct module_path *mpath; |
140 | ||
5cefa1d6 | 141 | RB_DLINK_FOREACH(ptr, mod_paths.head) |
212380e3 AC |
142 | { |
143 | mpath = ptr->data; | |
144 | ||
145 | if(!strcmp(path, mpath->path)) | |
146 | return mpath; | |
147 | } | |
148 | ||
149 | return NULL; | |
150 | } | |
151 | ||
152 | /* mod_add_path | |
153 | * | |
154 | * input - path | |
155 | * ouput - | |
156 | * side effects - adds path to list | |
157 | */ | |
158 | void | |
159 | mod_add_path(const char *path) | |
160 | { | |
161 | struct module_path *pathst; | |
162 | ||
163 | if(mod_find_path(path)) | |
164 | return; | |
165 | ||
eddc2ab6 | 166 | pathst = rb_malloc(sizeof(struct module_path)); |
212380e3 AC |
167 | |
168 | strcpy(pathst->path, path); | |
330fc5c1 | 169 | rb_dlinkAddAlloc(pathst, &mod_paths); |
212380e3 AC |
170 | } |
171 | ||
172 | /* mod_clear_paths() | |
173 | * | |
174 | * input - | |
175 | * output - | |
176 | * side effects - clear the lists of paths | |
177 | */ | |
178 | void | |
179 | mod_clear_paths(void) | |
180 | { | |
637c4932 | 181 | rb_dlink_node *ptr, *next_ptr; |
212380e3 | 182 | |
637c4932 | 183 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head) |
212380e3 | 184 | { |
637c4932 | 185 | rb_free(ptr->data); |
30106156 | 186 | rb_free_rb_dlink_node(ptr); |
212380e3 AC |
187 | } |
188 | ||
189 | mod_paths.head = mod_paths.tail = NULL; | |
190 | mod_paths.length = 0; | |
191 | } | |
192 | ||
193 | /* irc_basename | |
194 | * | |
195 | * input - | |
196 | * output - | |
197 | * side effects - | |
198 | */ | |
199 | char * | |
200 | irc_basename(const char *path) | |
201 | { | |
eddc2ab6 | 202 | char *mod_basename = rb_malloc(strlen(path) + 1); |
212380e3 AC |
203 | const char *s; |
204 | ||
205 | if(!(s = strrchr(path, '/'))) | |
206 | s = path; | |
207 | else | |
208 | s++; | |
209 | ||
210 | (void) strcpy(mod_basename, s); | |
211 | return mod_basename; | |
212 | } | |
213 | ||
214 | /* findmodule_byname | |
215 | * | |
216 | * input - | |
217 | * output - | |
218 | * side effects - | |
219 | */ | |
220 | ||
221 | int | |
222 | findmodule_byname(const char *name) | |
223 | { | |
224 | int i; | |
225 | ||
226 | for (i = 0; i < num_mods; i++) | |
227 | { | |
228 | if(!irccmp(modlist[i]->name, name)) | |
229 | return i; | |
230 | } | |
231 | return -1; | |
232 | } | |
233 | ||
234 | /* load_all_modules() | |
235 | * | |
236 | * input - | |
237 | * output - | |
238 | * side effects - | |
239 | */ | |
240 | void | |
241 | load_all_modules(int warn) | |
242 | { | |
243 | DIR *system_module_dir = NULL; | |
244 | struct dirent *ldirent = NULL; | |
245 | char module_fq_name[PATH_MAX + 1]; | |
246 | int len; | |
247 | ||
248 | modules_init(); | |
249 | ||
eddc2ab6 | 250 | modlist = (struct module **) rb_malloc(sizeof(struct module) * (MODS_INCREMENT)); |
212380e3 AC |
251 | |
252 | max_mods = MODS_INCREMENT; | |
253 | ||
254 | system_module_dir = opendir(AUTOMODPATH); | |
255 | ||
256 | if(system_module_dir == NULL) | |
257 | { | |
258 | ilog(L_MAIN, "Could not load modules from %s: %s", AUTOMODPATH, strerror(errno)); | |
259 | return; | |
260 | } | |
261 | ||
262 | while ((ldirent = readdir(system_module_dir)) != NULL) | |
263 | { | |
264 | len = strlen(ldirent->d_name); | |
265 | if((len > 3) && !strcmp(ldirent->d_name+len-3, SHARED_SUFFIX)) | |
266 | { | |
b2f0da88 | 267 | (void) rb_snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s", AUTOMODPATH, ldirent->d_name); |
212380e3 AC |
268 | (void) load_a_module(module_fq_name, warn, 0); |
269 | } | |
270 | ||
271 | } | |
272 | (void) closedir(system_module_dir); | |
273 | } | |
274 | ||
275 | /* load_core_modules() | |
276 | * | |
277 | * input - | |
278 | * output - | |
279 | * side effects - core modules are loaded, if any fail, kill ircd | |
280 | */ | |
281 | void | |
282 | load_core_modules(int warn) | |
283 | { | |
284 | char module_name[MAXPATHLEN]; | |
285 | int i; | |
286 | ||
287 | ||
288 | for (i = 0; core_module_table[i]; i++) | |
289 | { | |
b2f0da88 | 290 | rb_snprintf(module_name, sizeof(module_name), "%s/%s%s", MODPATH, |
212380e3 AC |
291 | core_module_table[i], SHARED_SUFFIX); |
292 | ||
293 | if(load_a_module(module_name, warn, 1) == -1) | |
294 | { | |
295 | ilog(L_MAIN, | |
296 | "Error loading core module %s%s: terminating ircd", | |
297 | core_module_table[i], SHARED_SUFFIX); | |
298 | exit(0); | |
299 | } | |
300 | } | |
301 | } | |
302 | ||
303 | /* load_one_module() | |
304 | * | |
305 | * input - | |
306 | * output - | |
307 | * side effects - | |
308 | */ | |
309 | int | |
310 | load_one_module(const char *path, int coremodule) | |
311 | { | |
312 | char modpath[MAXPATHLEN]; | |
330fc5c1 | 313 | rb_dlink_node *pathst; |
212380e3 AC |
314 | struct module_path *mpath; |
315 | ||
316 | struct stat statbuf; | |
317 | ||
318 | if (server_state_foreground == 1) | |
319 | inotice("loading module %s ...", path); | |
320 | ||
5cefa1d6 | 321 | RB_DLINK_FOREACH(pathst, mod_paths.head) |
212380e3 AC |
322 | { |
323 | mpath = pathst->data; | |
324 | ||
b2f0da88 | 325 | rb_snprintf(modpath, sizeof(modpath), "%s/%s", mpath->path, path); |
212380e3 AC |
326 | if((strstr(modpath, "../") == NULL) && (strstr(modpath, "/..") == NULL)) |
327 | { | |
328 | if(stat(modpath, &statbuf) == 0) | |
329 | { | |
330 | if(S_ISREG(statbuf.st_mode)) | |
331 | { | |
332 | /* Regular files only please */ | |
333 | if(coremodule) | |
334 | return load_a_module(modpath, 1, 1); | |
335 | else | |
336 | return load_a_module(modpath, 1, 0); | |
337 | } | |
338 | } | |
339 | ||
340 | } | |
341 | } | |
342 | ||
343 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Cannot locate module %s", path); | |
344 | return -1; | |
345 | } | |
346 | ||
347 | ||
348 | /* load a module .. */ | |
349 | static int | |
350 | mo_modload(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
351 | { | |
352 | char *m_bn; | |
353 | ||
354 | if(!IsOperAdmin(source_p)) | |
355 | { | |
356 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
357 | me.name, source_p->name, "admin"); | |
358 | return 0; | |
359 | } | |
360 | ||
361 | m_bn = irc_basename(parv[1]); | |
362 | ||
363 | if(findmodule_byname(m_bn) != -1) | |
364 | { | |
5366977b | 365 | sendto_one_notice(source_p, ":Module %s is already loaded", m_bn); |
637c4932 | 366 | rb_free(m_bn); |
212380e3 AC |
367 | return 0; |
368 | } | |
369 | ||
370 | load_one_module(parv[1], 0); | |
371 | ||
637c4932 | 372 | rb_free(m_bn); |
212380e3 AC |
373 | |
374 | return 0; | |
375 | } | |
376 | ||
377 | ||
378 | /* unload a module .. */ | |
379 | static int | |
380 | mo_modunload(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
381 | { | |
382 | char *m_bn; | |
383 | int modindex; | |
384 | ||
385 | if(!IsOperAdmin(source_p)) | |
386 | { | |
387 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
388 | me.name, source_p->name, "admin"); | |
389 | return 0; | |
390 | } | |
391 | ||
392 | m_bn = irc_basename(parv[1]); | |
393 | ||
394 | if((modindex = findmodule_byname(m_bn)) == -1) | |
395 | { | |
5366977b | 396 | sendto_one_notice(source_p, ":Module %s is not loaded", m_bn); |
637c4932 | 397 | rb_free(m_bn); |
212380e3 AC |
398 | return 0; |
399 | } | |
400 | ||
401 | if(modlist[modindex]->core == 1) | |
402 | { | |
5366977b | 403 | sendto_one_notice(source_p, ":Module %s is a core module and may not be unloaded", m_bn); |
637c4932 | 404 | rb_free(m_bn); |
212380e3 AC |
405 | return 0; |
406 | } | |
407 | ||
408 | if(unload_one_module(m_bn, 1) == -1) | |
409 | { | |
5366977b | 410 | sendto_one_notice(source_p, ":Module %s is not loaded", m_bn); |
212380e3 | 411 | } |
5366977b | 412 | |
637c4932 | 413 | rb_free(m_bn); |
212380e3 AC |
414 | return 0; |
415 | } | |
416 | ||
417 | /* unload and load in one! */ | |
418 | static int | |
419 | mo_modreload(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
420 | { | |
421 | char *m_bn; | |
422 | int modindex; | |
423 | int check_core; | |
424 | ||
425 | if(!IsOperAdmin(source_p)) | |
426 | { | |
427 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
428 | me.name, source_p->name, "admin"); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | m_bn = irc_basename(parv[1]); | |
433 | ||
434 | if((modindex = findmodule_byname(m_bn)) == -1) | |
435 | { | |
5366977b | 436 | sendto_one_notice(source_p, ":Module %s is not loaded", m_bn); |
637c4932 | 437 | rb_free(m_bn); |
212380e3 AC |
438 | return 0; |
439 | } | |
440 | ||
441 | check_core = modlist[modindex]->core; | |
442 | ||
443 | if(unload_one_module(m_bn, 1) == -1) | |
444 | { | |
5366977b | 445 | sendto_one_notice(source_p, ":Module %s is not loaded", m_bn); |
637c4932 | 446 | rb_free(m_bn); |
212380e3 AC |
447 | return 0; |
448 | } | |
449 | ||
450 | if((load_one_module(parv[1], check_core) == -1) && check_core) | |
451 | { | |
452 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
453 | "Error reloading core module: %s: terminating ircd", parv[1]); | |
454 | ilog(L_MAIN, "Error loading core module %s: terminating ircd", parv[1]); | |
455 | exit(0); | |
456 | } | |
457 | ||
637c4932 | 458 | rb_free(m_bn); |
212380e3 AC |
459 | return 0; |
460 | } | |
461 | ||
462 | /* list modules .. */ | |
463 | static int | |
464 | mo_modlist(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
465 | { | |
466 | int i; | |
467 | ||
468 | if(!IsOperAdmin(source_p)) | |
469 | { | |
470 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
471 | me.name, source_p->name, "admin"); | |
472 | return 0; | |
473 | } | |
474 | ||
475 | for (i = 0; i < num_mods; i++) | |
476 | { | |
477 | if(parc > 1) | |
478 | { | |
479 | if(match(parv[1], modlist[i]->name)) | |
480 | { | |
481 | sendto_one(source_p, form_str(RPL_MODLIST), | |
482 | me.name, source_p->name, | |
483 | modlist[i]->name, | |
484 | modlist[i]->address, | |
485 | modlist[i]->version, modlist[i]->core ? "(core)" : ""); | |
486 | } | |
487 | } | |
488 | else | |
489 | { | |
490 | sendto_one(source_p, form_str(RPL_MODLIST), | |
491 | me.name, source_p->name, modlist[i]->name, | |
492 | modlist[i]->address, modlist[i]->version, | |
493 | modlist[i]->core ? "(core)" : ""); | |
494 | } | |
495 | } | |
496 | ||
497 | sendto_one(source_p, form_str(RPL_ENDOFMODLIST), me.name, source_p->name); | |
498 | return 0; | |
499 | } | |
500 | ||
501 | /* unload and reload all modules */ | |
502 | static int | |
503 | mo_modrestart(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
504 | { | |
505 | int modnum; | |
506 | ||
507 | if(!IsOperAdmin(source_p)) | |
508 | { | |
509 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
510 | me.name, source_p->name, "admin"); | |
511 | return 0; | |
512 | } | |
513 | ||
5366977b | 514 | sendto_one_notice(source_p, ":Reloading all modules"); |
212380e3 AC |
515 | |
516 | modnum = num_mods; | |
517 | while (num_mods) | |
518 | unload_one_module(modlist[0]->name, 0); | |
519 | ||
520 | load_all_modules(0); | |
521 | load_core_modules(0); | |
522 | rehash(0); | |
523 | ||
524 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
525 | "Module Restart: %d modules unloaded, %d modules loaded", | |
526 | modnum, num_mods); | |
527 | ilog(L_MAIN, "Module Restart: %d modules unloaded, %d modules loaded", modnum, num_mods); | |
528 | return 0; | |
529 | } | |
530 | ||
531 | ||
532 | ||
533 | #ifndef RTLD_NOW | |
534 | #define RTLD_NOW RTLD_LAZY /* openbsd deficiency */ | |
535 | #endif | |
536 | ||
537 | #ifdef CHARYBDIS_PROFILE | |
538 | # ifndef RTLD_PROFILE | |
539 | # warning libdl may not support profiling, sucks. :( | |
540 | # define RTLD_PROFILE 0 | |
541 | # endif | |
542 | #endif | |
543 | ||
544 | static void increase_modlist(void); | |
545 | ||
546 | #define MODS_INCREMENT 10 | |
547 | ||
548 | static char unknown_ver[] = "<unknown>"; | |
549 | ||
550 | /* This file contains the core functions to use dynamic libraries. | |
551 | * -TimeMr14C | |
552 | */ | |
553 | ||
554 | ||
555 | #ifdef HAVE_MACH_O_DYLD_H | |
556 | /* | |
557 | ** jmallett's dl*(3) shims for NSModule(3) systems. | |
558 | */ | |
559 | #include <mach-o/dyld.h> | |
560 | ||
561 | #ifndef HAVE_DLOPEN | |
562 | #ifndef RTLD_LAZY | |
563 | #define RTLD_LAZY 2185 /* built-in dl*(3) don't care */ | |
564 | #endif | |
565 | ||
566 | void undefinedErrorHandler(const char *); | |
567 | NSModule multipleErrorHandler(NSSymbol, NSModule, NSModule); | |
568 | void linkEditErrorHandler(NSLinkEditErrors, int, const char *, const char *); | |
569 | char *dlerror(void); | |
570 | void *dlopen(char *, int); | |
571 | int dlclose(void *); | |
572 | void *dlsym(void *, char *); | |
573 | ||
574 | static int firstLoad = TRUE; | |
575 | static int myDlError; | |
576 | static char *myErrorTable[] = { "Loading file as object failed\n", | |
577 | "Loading file as object succeeded\n", | |
578 | "Not a valid shared object\n", | |
579 | "Architecture of object invalid on this architecture\n", | |
580 | "Invalid or corrupt image\n", | |
581 | "Could not access object\n", | |
582 | "NSCreateObjectFileImageFromFile failed\n", | |
583 | NULL | |
584 | }; | |
585 | ||
586 | void | |
587 | undefinedErrorHandler(const char *symbolName) | |
588 | { | |
589 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Undefined symbol: %s", symbolName); | |
590 | ilog(L_MAIN, "Undefined symbol: %s", symbolName); | |
591 | return; | |
592 | } | |
593 | ||
594 | NSModule | |
595 | multipleErrorHandler(NSSymbol s, NSModule old, NSModule new) | |
596 | { | |
597 | /* XXX | |
598 | ** This results in substantial leaking of memory... Should free one | |
599 | ** module, maybe? | |
600 | */ | |
601 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
602 | "Symbol `%s' found in `%s' and `%s'", | |
603 | NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new)); | |
604 | ilog(L_MAIN, "Symbol `%s' found in `%s' and `%s'", | |
605 | NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new)); | |
606 | /* We return which module should be considered valid, I believe */ | |
607 | return new; | |
608 | } | |
609 | ||
610 | void | |
611 | linkEditErrorHandler(NSLinkEditErrors errorClass, int errnum, | |
612 | const char *fileName, const char *errorString) | |
613 | { | |
614 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
615 | "Link editor error: %s for %s", errorString, fileName); | |
616 | ilog(L_MAIN, "Link editor error: %s for %s", errorString, fileName); | |
617 | return; | |
618 | } | |
619 | ||
620 | char * | |
621 | dlerror(void) | |
622 | { | |
623 | return myDlError == NSObjectFileImageSuccess ? NULL : myErrorTable[myDlError % 7]; | |
624 | } | |
625 | ||
626 | void * | |
627 | dlopen(char *filename, int unused) | |
628 | { | |
629 | NSObjectFileImage myImage; | |
630 | NSModule myModule; | |
631 | ||
632 | if(firstLoad) | |
633 | { | |
634 | /* | |
635 | ** If we are loading our first symbol (huzzah!) we should go ahead | |
636 | ** and install link editor error handling! | |
637 | */ | |
638 | NSLinkEditErrorHandlers linkEditorErrorHandlers; | |
639 | ||
640 | linkEditorErrorHandlers.undefined = undefinedErrorHandler; | |
641 | linkEditorErrorHandlers.multiple = multipleErrorHandler; | |
642 | linkEditorErrorHandlers.linkEdit = linkEditErrorHandler; | |
643 | NSInstallLinkEditErrorHandlers(&linkEditorErrorHandlers); | |
644 | firstLoad = FALSE; | |
645 | } | |
646 | myDlError = NSCreateObjectFileImageFromFile(filename, &myImage); | |
647 | if(myDlError != NSObjectFileImageSuccess) | |
648 | { | |
649 | return NULL; | |
650 | } | |
651 | myModule = NSLinkModule(myImage, filename, NSLINKMODULE_OPTION_PRIVATE); | |
652 | return (void *) myModule; | |
653 | } | |
654 | ||
655 | int | |
656 | dlclose(void *myModule) | |
657 | { | |
658 | NSUnLinkModule(myModule, FALSE); | |
659 | return 0; | |
660 | } | |
661 | ||
662 | void * | |
663 | dlsym(void *myModule, char *mySymbolName) | |
664 | { | |
665 | NSSymbol mySymbol; | |
666 | ||
667 | mySymbol = NSLookupSymbolInModule((NSModule) myModule, mySymbolName); | |
668 | return NSAddressOfSymbol(mySymbol); | |
669 | } | |
670 | #endif | |
671 | #endif | |
672 | ||
673 | ||
674 | /* | |
675 | * HPUX dl compat functions | |
676 | */ | |
677 | #if defined(HAVE_SHL_LOAD) && !defined(HAVE_DLOPEN) | |
678 | #define RTLD_LAZY BIND_DEFERRED | |
679 | #define RTLD_GLOBAL DYNAMIC_PATH | |
680 | #define dlopen(file,mode) (void *)shl_load((file), (mode), (long) 0) | |
681 | #define dlclose(handle) shl_unload((shl_t)(handle)) | |
682 | #define dlsym(handle,name) hpux_dlsym(handle,name) | |
683 | #define dlerror() strerror(errno) | |
684 | ||
685 | static void * | |
686 | hpux_dlsym(void *handle, char *name) | |
687 | { | |
688 | void *sym_addr; | |
689 | if(!shl_findsym((shl_t *) & handle, name, TYPE_UNDEFINED, &sym_addr)) | |
690 | return sym_addr; | |
691 | return NULL; | |
692 | } | |
693 | ||
694 | #endif | |
695 | ||
696 | /* unload_one_module() | |
697 | * | |
698 | * inputs - name of module to unload | |
699 | * - 1 to say modules unloaded, 0 to not | |
700 | * output - 0 if successful, -1 if error | |
701 | * side effects - module is unloaded | |
702 | */ | |
703 | int | |
704 | unload_one_module(const char *name, int warn) | |
705 | { | |
706 | int modindex; | |
707 | ||
708 | if((modindex = findmodule_byname(name)) == -1) | |
709 | return -1; | |
710 | ||
711 | /* | |
712 | ** XXX - The type system in C does not allow direct conversion between | |
713 | ** data and function pointers, but as it happens, most C compilers will | |
714 | ** safely do this, however it is a theoretical overlow to cast as we | |
715 | ** must do here. I have library functions to take care of this, but | |
716 | ** despite being more "correct" for the C language, this is more | |
717 | ** practical. Removing the abuse of the ability to cast ANY pointer | |
718 | ** to and from an integer value here will break some compilers. | |
719 | ** -jmallett | |
720 | */ | |
721 | /* Left the comment in but the code isn't here any more -larne */ | |
722 | switch (modlist[modindex]->mapi_version) | |
723 | { | |
724 | case 1: | |
725 | { | |
726 | struct mapi_mheader_av1 *mheader = modlist[modindex]->mapi_header; | |
727 | if(mheader->mapi_command_list) | |
728 | { | |
729 | struct Message **m; | |
730 | for (m = mheader->mapi_command_list; *m; ++m) | |
731 | mod_del_cmd(*m); | |
732 | } | |
733 | ||
734 | /* hook events are never removed, we simply lose the | |
735 | * ability to call them --fl | |
736 | */ | |
737 | if(mheader->mapi_hfn_list) | |
738 | { | |
739 | mapi_hfn_list_av1 *m; | |
740 | for (m = mheader->mapi_hfn_list; m->hapi_name; ++m) | |
741 | remove_hook(m->hapi_name, m->fn); | |
742 | } | |
743 | ||
744 | if(mheader->mapi_unregister) | |
745 | mheader->mapi_unregister(); | |
746 | break; | |
747 | } | |
748 | default: | |
749 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
750 | "Unknown/unsupported MAPI version %d when unloading %s!", | |
751 | modlist[modindex]->mapi_version, modlist[modindex]->name); | |
752 | ilog(L_MAIN, "Unknown/unsupported MAPI version %d when unloading %s!", | |
753 | modlist[modindex]->mapi_version, modlist[modindex]->name); | |
754 | break; | |
755 | } | |
756 | ||
757 | dlclose(modlist[modindex]->address); | |
758 | ||
637c4932 | 759 | rb_free(modlist[modindex]->name); |
212380e3 AC |
760 | memcpy(&modlist[modindex], &modlist[modindex + 1], |
761 | sizeof(struct module) * ((num_mods - 1) - modindex)); | |
762 | ||
763 | if(num_mods != 0) | |
764 | num_mods--; | |
765 | ||
766 | if(warn == 1) | |
767 | { | |
768 | ilog(L_MAIN, "Module %s unloaded", name); | |
769 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Module %s unloaded", name); | |
770 | } | |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
775 | ||
776 | /* | |
777 | * load_a_module() | |
778 | * | |
779 | * inputs - path name of module, int to notice, int of core | |
780 | * output - -1 if error 0 if success | |
781 | * side effects - loads a module if successful | |
782 | */ | |
783 | int | |
784 | load_a_module(const char *path, int warn, int core) | |
785 | { | |
786 | void *tmpptr = NULL; | |
787 | ||
788 | char *mod_basename; | |
789 | const char *ver; | |
790 | ||
791 | int *mapi_version; | |
792 | ||
793 | mod_basename = irc_basename(path); | |
794 | ||
795 | #ifdef CHARYBDIS_PROFILE | |
796 | tmpptr = dlopen(path, RTLD_NOW | RTLD_PROFILE); | |
797 | #else | |
798 | tmpptr = dlopen(path, RTLD_NOW); | |
799 | #endif | |
800 | ||
801 | if(tmpptr == NULL) | |
802 | { | |
803 | const char *err = dlerror(); | |
804 | ||
805 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
806 | "Error loading module %s: %s", mod_basename, err); | |
807 | ilog(L_MAIN, "Error loading module %s: %s", mod_basename, err); | |
637c4932 | 808 | rb_free(mod_basename); |
212380e3 AC |
809 | return -1; |
810 | } | |
811 | ||
812 | ||
813 | /* | |
814 | * _mheader is actually a struct mapi_mheader_*, but mapi_version | |
815 | * is always the first member of this structure, so we treate it | |
816 | * as a single int in order to determine the API version. | |
817 | * -larne. | |
818 | */ | |
819 | mapi_version = (int *) (uintptr_t) dlsym(tmpptr, "_mheader"); | |
820 | if((mapi_version == NULL | |
821 | && (mapi_version = (int *) (uintptr_t) dlsym(tmpptr, "__mheader")) == NULL) | |
822 | || MAPI_MAGIC(*mapi_version) != MAPI_MAGIC_HDR) | |
823 | { | |
824 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
825 | "Data format error: module %s has no MAPI header.", | |
826 | mod_basename); | |
827 | ilog(L_MAIN, "Data format error: module %s has no MAPI header.", mod_basename); | |
828 | (void) dlclose(tmpptr); | |
637c4932 | 829 | rb_free(mod_basename); |
212380e3 AC |
830 | return -1; |
831 | } | |
832 | ||
833 | switch (MAPI_VERSION(*mapi_version)) | |
834 | { | |
835 | case 1: | |
836 | { | |
837 | struct mapi_mheader_av1 *mheader = (struct mapi_mheader_av1 *) mapi_version; /* see above */ | |
838 | if(mheader->mapi_register && (mheader->mapi_register() == -1)) | |
839 | { | |
840 | ilog(L_MAIN, "Module %s indicated failure during load.", | |
841 | mod_basename); | |
842 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
843 | "Module %s indicated failure during load.", | |
844 | mod_basename); | |
845 | dlclose(tmpptr); | |
637c4932 | 846 | rb_free(mod_basename); |
212380e3 AC |
847 | return -1; |
848 | } | |
849 | if(mheader->mapi_command_list) | |
850 | { | |
851 | struct Message **m; | |
852 | for (m = mheader->mapi_command_list; *m; ++m) | |
853 | mod_add_cmd(*m); | |
854 | } | |
855 | ||
856 | if(mheader->mapi_hook_list) | |
857 | { | |
858 | mapi_hlist_av1 *m; | |
859 | for (m = mheader->mapi_hook_list; m->hapi_name; ++m) | |
860 | *m->hapi_id = register_hook(m->hapi_name); | |
861 | } | |
862 | ||
863 | if(mheader->mapi_hfn_list) | |
864 | { | |
865 | mapi_hfn_list_av1 *m; | |
866 | for (m = mheader->mapi_hfn_list; m->hapi_name; ++m) | |
867 | add_hook(m->hapi_name, m->fn); | |
868 | } | |
869 | ||
870 | ver = mheader->mapi_module_version; | |
871 | break; | |
872 | } | |
873 | ||
874 | default: | |
875 | ilog(L_MAIN, "Module %s has unknown/unsupported MAPI version %d.", | |
876 | mod_basename, MAPI_VERSION(*mapi_version)); | |
877 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
878 | "Module %s has unknown/unsupported MAPI version %d.", | |
879 | mod_basename, *mapi_version); | |
880 | dlclose(tmpptr); | |
637c4932 | 881 | rb_free(mod_basename); |
212380e3 AC |
882 | return -1; |
883 | } | |
884 | ||
885 | if(ver == NULL) | |
886 | ver = unknown_ver; | |
887 | ||
888 | increase_modlist(); | |
889 | ||
eddc2ab6 | 890 | modlist[num_mods] = rb_malloc(sizeof(struct module)); |
212380e3 AC |
891 | modlist[num_mods]->address = tmpptr; |
892 | modlist[num_mods]->version = ver; | |
893 | modlist[num_mods]->core = core; | |
47a03750 | 894 | modlist[num_mods]->name = rb_strdup(mod_basename); |
212380e3 AC |
895 | modlist[num_mods]->mapi_header = mapi_version; |
896 | modlist[num_mods]->mapi_version = MAPI_VERSION(*mapi_version); | |
897 | num_mods++; | |
898 | ||
899 | if(warn == 1) | |
900 | { | |
901 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
902 | "Module %s [version: %s; MAPI version: %d] loaded at 0x%lx", | |
903 | mod_basename, ver, MAPI_VERSION(*mapi_version), | |
904 | (unsigned long) tmpptr); | |
905 | ilog(L_MAIN, "Module %s [version: %s; MAPI version: %d] loaded at 0x%lx", | |
906 | mod_basename, ver, MAPI_VERSION(*mapi_version), (unsigned long) tmpptr); | |
907 | } | |
637c4932 | 908 | rb_free(mod_basename); |
212380e3 AC |
909 | return 0; |
910 | } | |
911 | ||
912 | /* | |
913 | * increase_modlist | |
914 | * | |
915 | * inputs - NONE | |
916 | * output - NONE | |
917 | * side effects - expand the size of modlist if necessary | |
918 | */ | |
919 | static void | |
920 | increase_modlist(void) | |
921 | { | |
922 | struct module **new_modlist = NULL; | |
923 | ||
924 | if((num_mods + 1) < max_mods) | |
925 | return; | |
926 | ||
eddc2ab6 | 927 | new_modlist = (struct module **) rb_malloc(sizeof(struct module) * |
212380e3 AC |
928 | (max_mods + MODS_INCREMENT)); |
929 | memcpy((void *) new_modlist, (void *) modlist, sizeof(struct module) * num_mods); | |
930 | ||
637c4932 | 931 | rb_free(modlist); |
212380e3 AC |
932 | modlist = new_modlist; |
933 | max_mods += MODS_INCREMENT; | |
934 | } | |
935 | ||
936 | #else /* STATIC_MODULES */ | |
937 | ||
938 | /* load_all_modules() | |
939 | * | |
940 | * input - | |
941 | * output - | |
942 | * side effects - all the msgtabs are added for static modules | |
943 | */ | |
944 | void | |
945 | load_all_modules(int warn) | |
946 | { | |
947 | load_static_modules(); | |
948 | } | |
949 | ||
950 | #endif /* STATIC_MODULES */ |