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