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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" | |
4562c604 | 40 | #include "match.h" |
212380e3 AC |
41 | |
42 | ||
43 | ||
44 | /* -TimeMr14C: | |
45 | * I have moved the dl* function definitions and | |
46 | * the two functions (load_a_module / unload_a_module) to the | |
47 | * file dynlink.c | |
48 | * And also made the necessary changes to those functions | |
49 | * to comply with shl_load and friends. | |
50 | * In this file, to keep consistency with the makefile, | |
51 | * I added the ability to load *.sl files, too. | |
52 | * 27/02/2002 | |
53 | */ | |
54 | ||
55 | #ifndef STATIC_MODULES | |
56 | ||
57 | struct module **modlist = NULL; | |
58 | ||
59 | static const char *core_module_table[] = { | |
431a1a27 | 60 | "m_ban", |
212380e3 AC |
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 | ||
212380e3 AC |
113 | void |
114 | modules_init(void) | |
115 | { | |
116 | mod_add_cmd(&modload_msgtab); | |
117 | mod_add_cmd(&modunload_msgtab); | |
118 | mod_add_cmd(&modreload_msgtab); | |
119 | mod_add_cmd(&modlist_msgtab); | |
120 | mod_add_cmd(&modrestart_msgtab); | |
121 | ||
122 | /* Add the default paths we look in to the module system --nenolod */ | |
123 | mod_add_path(MODPATH); | |
124 | mod_add_path(AUTOMODPATH); | |
125 | } | |
126 | ||
127 | /* mod_find_path() | |
128 | * | |
129 | * input - path | |
130 | * output - none | |
131 | * side effects - returns a module path from path | |
132 | */ | |
26c6ac3d | 133 | static char * |
212380e3 AC |
134 | mod_find_path(const char *path) |
135 | { | |
330fc5c1 | 136 | rb_dlink_node *ptr; |
26c6ac3d | 137 | char *mpath; |
212380e3 | 138 | |
5cefa1d6 | 139 | RB_DLINK_FOREACH(ptr, mod_paths.head) |
212380e3 AC |
140 | { |
141 | mpath = ptr->data; | |
142 | ||
26c6ac3d | 143 | if(!strcmp(path, mpath)) |
212380e3 AC |
144 | return mpath; |
145 | } | |
146 | ||
147 | return NULL; | |
148 | } | |
149 | ||
150 | /* mod_add_path | |
151 | * | |
152 | * input - path | |
153 | * ouput - | |
154 | * side effects - adds path to list | |
155 | */ | |
156 | void | |
157 | mod_add_path(const char *path) | |
158 | { | |
26c6ac3d | 159 | char *pathst; |
212380e3 AC |
160 | |
161 | if(mod_find_path(path)) | |
162 | return; | |
163 | ||
26c6ac3d | 164 | pathst = rb_strdup(path); |
330fc5c1 | 165 | rb_dlinkAddAlloc(pathst, &mod_paths); |
212380e3 AC |
166 | } |
167 | ||
168 | /* mod_clear_paths() | |
169 | * | |
170 | * input - | |
171 | * output - | |
172 | * side effects - clear the lists of paths | |
173 | */ | |
174 | void | |
175 | mod_clear_paths(void) | |
176 | { | |
637c4932 | 177 | rb_dlink_node *ptr, *next_ptr; |
212380e3 | 178 | |
637c4932 | 179 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, mod_paths.head) |
212380e3 | 180 | { |
637c4932 | 181 | rb_free(ptr->data); |
30106156 | 182 | rb_free_rb_dlink_node(ptr); |
212380e3 AC |
183 | } |
184 | ||
185 | mod_paths.head = mod_paths.tail = NULL; | |
186 | mod_paths.length = 0; | |
187 | } | |
188 | ||
212380e3 AC |
189 | /* findmodule_byname |
190 | * | |
191 | * input - | |
192 | * output - | |
193 | * side effects - | |
194 | */ | |
195 | ||
196 | int | |
197 | findmodule_byname(const char *name) | |
198 | { | |
199 | int i; | |
200 | ||
201 | for (i = 0; i < num_mods; i++) | |
202 | { | |
203 | if(!irccmp(modlist[i]->name, name)) | |
204 | return i; | |
205 | } | |
206 | return -1; | |
207 | } | |
208 | ||
209 | /* load_all_modules() | |
210 | * | |
211 | * input - | |
212 | * output - | |
213 | * side effects - | |
214 | */ | |
215 | void | |
216 | load_all_modules(int warn) | |
217 | { | |
218 | DIR *system_module_dir = NULL; | |
219 | struct dirent *ldirent = NULL; | |
220 | char module_fq_name[PATH_MAX + 1]; | |
221 | int len; | |
222 | ||
223 | modules_init(); | |
224 | ||
1e170010 | 225 | modlist = (struct module **) rb_malloc(sizeof(struct module *) * (MODS_INCREMENT)); |
212380e3 AC |
226 | |
227 | max_mods = MODS_INCREMENT; | |
228 | ||
229 | system_module_dir = opendir(AUTOMODPATH); | |
230 | ||
231 | if(system_module_dir == NULL) | |
232 | { | |
233 | ilog(L_MAIN, "Could not load modules from %s: %s", AUTOMODPATH, strerror(errno)); | |
234 | return; | |
235 | } | |
236 | ||
237 | while ((ldirent = readdir(system_module_dir)) != NULL) | |
238 | { | |
239 | len = strlen(ldirent->d_name); | |
240 | if((len > 3) && !strcmp(ldirent->d_name+len-3, SHARED_SUFFIX)) | |
241 | { | |
b2f0da88 | 242 | (void) rb_snprintf(module_fq_name, sizeof(module_fq_name), "%s/%s", AUTOMODPATH, ldirent->d_name); |
212380e3 AC |
243 | (void) load_a_module(module_fq_name, warn, 0); |
244 | } | |
245 | ||
246 | } | |
247 | (void) closedir(system_module_dir); | |
248 | } | |
249 | ||
250 | /* load_core_modules() | |
251 | * | |
252 | * input - | |
253 | * output - | |
254 | * side effects - core modules are loaded, if any fail, kill ircd | |
255 | */ | |
256 | void | |
257 | load_core_modules(int warn) | |
258 | { | |
d74fa5b5 | 259 | char module_name[PATH_MAX]; |
212380e3 AC |
260 | int i; |
261 | ||
262 | ||
263 | for (i = 0; core_module_table[i]; i++) | |
264 | { | |
b2f0da88 | 265 | rb_snprintf(module_name, sizeof(module_name), "%s/%s%s", MODPATH, |
212380e3 AC |
266 | core_module_table[i], SHARED_SUFFIX); |
267 | ||
268 | if(load_a_module(module_name, warn, 1) == -1) | |
269 | { | |
270 | ilog(L_MAIN, | |
271 | "Error loading core module %s%s: terminating ircd", | |
272 | core_module_table[i], SHARED_SUFFIX); | |
273 | exit(0); | |
274 | } | |
275 | } | |
276 | } | |
277 | ||
278 | /* load_one_module() | |
279 | * | |
280 | * input - | |
281 | * output - | |
282 | * side effects - | |
283 | */ | |
284 | int | |
285 | load_one_module(const char *path, int coremodule) | |
286 | { | |
d74fa5b5 | 287 | char modpath[PATH_MAX]; |
330fc5c1 | 288 | rb_dlink_node *pathst; |
26c6ac3d | 289 | const char *mpath; |
212380e3 AC |
290 | |
291 | struct stat statbuf; | |
292 | ||
293 | if (server_state_foreground == 1) | |
294 | inotice("loading module %s ...", path); | |
295 | ||
5cefa1d6 | 296 | RB_DLINK_FOREACH(pathst, mod_paths.head) |
212380e3 AC |
297 | { |
298 | mpath = pathst->data; | |
299 | ||
26c6ac3d | 300 | rb_snprintf(modpath, sizeof(modpath), "%s/%s", mpath, path); |
212380e3 AC |
301 | if((strstr(modpath, "../") == NULL) && (strstr(modpath, "/..") == NULL)) |
302 | { | |
303 | if(stat(modpath, &statbuf) == 0) | |
304 | { | |
305 | if(S_ISREG(statbuf.st_mode)) | |
306 | { | |
307 | /* Regular files only please */ | |
308 | if(coremodule) | |
309 | return load_a_module(modpath, 1, 1); | |
310 | else | |
311 | return load_a_module(modpath, 1, 0); | |
312 | } | |
313 | } | |
314 | ||
315 | } | |
316 | } | |
317 | ||
318 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Cannot locate module %s", path); | |
319 | return -1; | |
320 | } | |
321 | ||
322 | ||
323 | /* load a module .. */ | |
324 | static int | |
325 | mo_modload(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
326 | { | |
327 | char *m_bn; | |
328 | ||
329 | if(!IsOperAdmin(source_p)) | |
330 | { | |
331 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
332 | me.name, source_p->name, "admin"); | |
333 | return 0; | |
334 | } | |
335 | ||
b7a689d1 | 336 | m_bn = rb_basename(parv[1]); |
212380e3 AC |
337 | |
338 | if(findmodule_byname(m_bn) != -1) | |
339 | { | |
5366977b | 340 | sendto_one_notice(source_p, ":Module %s is already loaded", m_bn); |
637c4932 | 341 | rb_free(m_bn); |
212380e3 AC |
342 | return 0; |
343 | } | |
344 | ||
345 | load_one_module(parv[1], 0); | |
346 | ||
637c4932 | 347 | rb_free(m_bn); |
212380e3 AC |
348 | |
349 | return 0; | |
350 | } | |
351 | ||
352 | ||
353 | /* unload a module .. */ | |
354 | static int | |
355 | mo_modunload(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
356 | { | |
357 | char *m_bn; | |
358 | int modindex; | |
359 | ||
360 | if(!IsOperAdmin(source_p)) | |
361 | { | |
362 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
363 | me.name, source_p->name, "admin"); | |
364 | return 0; | |
365 | } | |
366 | ||
b7a689d1 | 367 | m_bn = rb_basename(parv[1]); |
212380e3 AC |
368 | |
369 | if((modindex = findmodule_byname(m_bn)) == -1) | |
370 | { | |
5366977b | 371 | sendto_one_notice(source_p, ":Module %s is not loaded", m_bn); |
637c4932 | 372 | rb_free(m_bn); |
212380e3 AC |
373 | return 0; |
374 | } | |
375 | ||
376 | if(modlist[modindex]->core == 1) | |
377 | { | |
5366977b | 378 | sendto_one_notice(source_p, ":Module %s is a core module and may not be unloaded", m_bn); |
637c4932 | 379 | rb_free(m_bn); |
212380e3 AC |
380 | return 0; |
381 | } | |
382 | ||
383 | if(unload_one_module(m_bn, 1) == -1) | |
384 | { | |
5366977b | 385 | sendto_one_notice(source_p, ":Module %s is not loaded", m_bn); |
212380e3 | 386 | } |
5366977b | 387 | |
637c4932 | 388 | rb_free(m_bn); |
212380e3 AC |
389 | return 0; |
390 | } | |
391 | ||
392 | /* unload and load in one! */ | |
393 | static int | |
394 | mo_modreload(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
395 | { | |
396 | char *m_bn; | |
397 | int modindex; | |
398 | int check_core; | |
399 | ||
400 | if(!IsOperAdmin(source_p)) | |
401 | { | |
402 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
403 | me.name, source_p->name, "admin"); | |
404 | return 0; | |
405 | } | |
406 | ||
b7a689d1 | 407 | m_bn = rb_basename(parv[1]); |
212380e3 AC |
408 | |
409 | if((modindex = findmodule_byname(m_bn)) == -1) | |
410 | { | |
5366977b | 411 | sendto_one_notice(source_p, ":Module %s is not loaded", m_bn); |
637c4932 | 412 | rb_free(m_bn); |
212380e3 AC |
413 | return 0; |
414 | } | |
415 | ||
416 | check_core = modlist[modindex]->core; | |
417 | ||
418 | if(unload_one_module(m_bn, 1) == -1) | |
419 | { | |
5366977b | 420 | sendto_one_notice(source_p, ":Module %s is not loaded", m_bn); |
637c4932 | 421 | rb_free(m_bn); |
212380e3 AC |
422 | return 0; |
423 | } | |
424 | ||
7d778d51 | 425 | if((load_one_module(m_bn, check_core) == -1) && check_core) |
212380e3 AC |
426 | { |
427 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
7d778d51 AC |
428 | "Error reloading core module: %s: terminating ircd", m_bn); |
429 | ilog(L_MAIN, "Error loading core module %s: terminating ircd", m_bn); | |
212380e3 AC |
430 | exit(0); |
431 | } | |
432 | ||
637c4932 | 433 | rb_free(m_bn); |
212380e3 AC |
434 | return 0; |
435 | } | |
436 | ||
437 | /* list modules .. */ | |
438 | static int | |
439 | mo_modlist(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
440 | { | |
441 | int i; | |
442 | ||
443 | if(!IsOperAdmin(source_p)) | |
444 | { | |
445 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
446 | me.name, source_p->name, "admin"); | |
447 | return 0; | |
448 | } | |
449 | ||
450 | for (i = 0; i < num_mods; i++) | |
451 | { | |
452 | if(parc > 1) | |
453 | { | |
454 | if(match(parv[1], modlist[i]->name)) | |
455 | { | |
456 | sendto_one(source_p, form_str(RPL_MODLIST), | |
457 | me.name, source_p->name, | |
458 | modlist[i]->name, | |
a9f12814 | 459 | (unsigned long)(uintptr_t)modlist[i]->address, |
212380e3 AC |
460 | modlist[i]->version, modlist[i]->core ? "(core)" : ""); |
461 | } | |
462 | } | |
463 | else | |
464 | { | |
465 | sendto_one(source_p, form_str(RPL_MODLIST), | |
466 | me.name, source_p->name, modlist[i]->name, | |
a9f12814 JT |
467 | (unsigned long)(uintptr_t)modlist[i]->address, |
468 | modlist[i]->version, | |
212380e3 AC |
469 | modlist[i]->core ? "(core)" : ""); |
470 | } | |
471 | } | |
472 | ||
473 | sendto_one(source_p, form_str(RPL_ENDOFMODLIST), me.name, source_p->name); | |
474 | return 0; | |
475 | } | |
476 | ||
477 | /* unload and reload all modules */ | |
478 | static int | |
479 | mo_modrestart(struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
480 | { | |
481 | int modnum; | |
482 | ||
483 | if(!IsOperAdmin(source_p)) | |
484 | { | |
485 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
486 | me.name, source_p->name, "admin"); | |
487 | return 0; | |
488 | } | |
489 | ||
5366977b | 490 | sendto_one_notice(source_p, ":Reloading all modules"); |
212380e3 AC |
491 | |
492 | modnum = num_mods; | |
493 | while (num_mods) | |
494 | unload_one_module(modlist[0]->name, 0); | |
495 | ||
496 | load_all_modules(0); | |
497 | load_core_modules(0); | |
498 | rehash(0); | |
499 | ||
500 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
501 | "Module Restart: %d modules unloaded, %d modules loaded", | |
502 | modnum, num_mods); | |
503 | ilog(L_MAIN, "Module Restart: %d modules unloaded, %d modules loaded", modnum, num_mods); | |
504 | return 0; | |
505 | } | |
506 | ||
507 | ||
508 | ||
509 | #ifndef RTLD_NOW | |
510 | #define RTLD_NOW RTLD_LAZY /* openbsd deficiency */ | |
511 | #endif | |
512 | ||
d4db3063 JT |
513 | #ifndef RTLD_LOCAL |
514 | #define RTLD_LOCAL 0 | |
515 | #endif | |
516 | ||
212380e3 AC |
517 | #ifdef CHARYBDIS_PROFILE |
518 | # ifndef RTLD_PROFILE | |
519 | # warning libdl may not support profiling, sucks. :( | |
520 | # define RTLD_PROFILE 0 | |
521 | # endif | |
522 | #endif | |
523 | ||
524 | static void increase_modlist(void); | |
525 | ||
526 | #define MODS_INCREMENT 10 | |
527 | ||
528 | static char unknown_ver[] = "<unknown>"; | |
529 | ||
530 | /* This file contains the core functions to use dynamic libraries. | |
531 | * -TimeMr14C | |
532 | */ | |
533 | ||
534 | ||
535 | #ifdef HAVE_MACH_O_DYLD_H | |
536 | /* | |
537 | ** jmallett's dl*(3) shims for NSModule(3) systems. | |
538 | */ | |
539 | #include <mach-o/dyld.h> | |
540 | ||
541 | #ifndef HAVE_DLOPEN | |
542 | #ifndef RTLD_LAZY | |
543 | #define RTLD_LAZY 2185 /* built-in dl*(3) don't care */ | |
544 | #endif | |
545 | ||
546 | void undefinedErrorHandler(const char *); | |
547 | NSModule multipleErrorHandler(NSSymbol, NSModule, NSModule); | |
548 | void linkEditErrorHandler(NSLinkEditErrors, int, const char *, const char *); | |
549 | char *dlerror(void); | |
550 | void *dlopen(char *, int); | |
551 | int dlclose(void *); | |
552 | void *dlsym(void *, char *); | |
553 | ||
554 | static int firstLoad = TRUE; | |
555 | static int myDlError; | |
556 | static char *myErrorTable[] = { "Loading file as object failed\n", | |
557 | "Loading file as object succeeded\n", | |
558 | "Not a valid shared object\n", | |
559 | "Architecture of object invalid on this architecture\n", | |
560 | "Invalid or corrupt image\n", | |
561 | "Could not access object\n", | |
562 | "NSCreateObjectFileImageFromFile failed\n", | |
563 | NULL | |
564 | }; | |
565 | ||
566 | void | |
567 | undefinedErrorHandler(const char *symbolName) | |
568 | { | |
569 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Undefined symbol: %s", symbolName); | |
570 | ilog(L_MAIN, "Undefined symbol: %s", symbolName); | |
571 | return; | |
572 | } | |
573 | ||
574 | NSModule | |
575 | multipleErrorHandler(NSSymbol s, NSModule old, NSModule new) | |
576 | { | |
577 | /* XXX | |
578 | ** This results in substantial leaking of memory... Should free one | |
579 | ** module, maybe? | |
580 | */ | |
581 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
582 | "Symbol `%s' found in `%s' and `%s'", | |
583 | NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new)); | |
584 | ilog(L_MAIN, "Symbol `%s' found in `%s' and `%s'", | |
585 | NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new)); | |
586 | /* We return which module should be considered valid, I believe */ | |
587 | return new; | |
588 | } | |
589 | ||
590 | void | |
591 | linkEditErrorHandler(NSLinkEditErrors errorClass, int errnum, | |
592 | const char *fileName, const char *errorString) | |
593 | { | |
594 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
595 | "Link editor error: %s for %s", errorString, fileName); | |
596 | ilog(L_MAIN, "Link editor error: %s for %s", errorString, fileName); | |
597 | return; | |
598 | } | |
599 | ||
600 | char * | |
601 | dlerror(void) | |
602 | { | |
603 | return myDlError == NSObjectFileImageSuccess ? NULL : myErrorTable[myDlError % 7]; | |
604 | } | |
605 | ||
606 | void * | |
607 | dlopen(char *filename, int unused) | |
608 | { | |
609 | NSObjectFileImage myImage; | |
610 | NSModule myModule; | |
611 | ||
612 | if(firstLoad) | |
613 | { | |
614 | /* | |
615 | ** If we are loading our first symbol (huzzah!) we should go ahead | |
616 | ** and install link editor error handling! | |
617 | */ | |
618 | NSLinkEditErrorHandlers linkEditorErrorHandlers; | |
619 | ||
620 | linkEditorErrorHandlers.undefined = undefinedErrorHandler; | |
621 | linkEditorErrorHandlers.multiple = multipleErrorHandler; | |
622 | linkEditorErrorHandlers.linkEdit = linkEditErrorHandler; | |
623 | NSInstallLinkEditErrorHandlers(&linkEditorErrorHandlers); | |
624 | firstLoad = FALSE; | |
625 | } | |
626 | myDlError = NSCreateObjectFileImageFromFile(filename, &myImage); | |
627 | if(myDlError != NSObjectFileImageSuccess) | |
628 | { | |
629 | return NULL; | |
630 | } | |
631 | myModule = NSLinkModule(myImage, filename, NSLINKMODULE_OPTION_PRIVATE); | |
632 | return (void *) myModule; | |
633 | } | |
634 | ||
635 | int | |
636 | dlclose(void *myModule) | |
637 | { | |
638 | NSUnLinkModule(myModule, FALSE); | |
639 | return 0; | |
640 | } | |
641 | ||
642 | void * | |
643 | dlsym(void *myModule, char *mySymbolName) | |
644 | { | |
645 | NSSymbol mySymbol; | |
646 | ||
647 | mySymbol = NSLookupSymbolInModule((NSModule) myModule, mySymbolName); | |
648 | return NSAddressOfSymbol(mySymbol); | |
649 | } | |
650 | #endif | |
651 | #endif | |
652 | ||
653 | ||
654 | /* | |
655 | * HPUX dl compat functions | |
656 | */ | |
657 | #if defined(HAVE_SHL_LOAD) && !defined(HAVE_DLOPEN) | |
658 | #define RTLD_LAZY BIND_DEFERRED | |
659 | #define RTLD_GLOBAL DYNAMIC_PATH | |
660 | #define dlopen(file,mode) (void *)shl_load((file), (mode), (long) 0) | |
661 | #define dlclose(handle) shl_unload((shl_t)(handle)) | |
662 | #define dlsym(handle,name) hpux_dlsym(handle,name) | |
663 | #define dlerror() strerror(errno) | |
664 | ||
665 | static void * | |
666 | hpux_dlsym(void *handle, char *name) | |
667 | { | |
668 | void *sym_addr; | |
669 | if(!shl_findsym((shl_t *) & handle, name, TYPE_UNDEFINED, &sym_addr)) | |
670 | return sym_addr; | |
671 | return NULL; | |
672 | } | |
673 | ||
674 | #endif | |
675 | ||
676 | /* unload_one_module() | |
677 | * | |
678 | * inputs - name of module to unload | |
679 | * - 1 to say modules unloaded, 0 to not | |
680 | * output - 0 if successful, -1 if error | |
681 | * side effects - module is unloaded | |
682 | */ | |
683 | int | |
684 | unload_one_module(const char *name, int warn) | |
685 | { | |
686 | int modindex; | |
687 | ||
688 | if((modindex = findmodule_byname(name)) == -1) | |
689 | return -1; | |
690 | ||
691 | /* | |
692 | ** XXX - The type system in C does not allow direct conversion between | |
693 | ** data and function pointers, but as it happens, most C compilers will | |
694 | ** safely do this, however it is a theoretical overlow to cast as we | |
695 | ** must do here. I have library functions to take care of this, but | |
696 | ** despite being more "correct" for the C language, this is more | |
697 | ** practical. Removing the abuse of the ability to cast ANY pointer | |
698 | ** to and from an integer value here will break some compilers. | |
699 | ** -jmallett | |
700 | */ | |
701 | /* Left the comment in but the code isn't here any more -larne */ | |
702 | switch (modlist[modindex]->mapi_version) | |
703 | { | |
704 | case 1: | |
705 | { | |
706 | struct mapi_mheader_av1 *mheader = modlist[modindex]->mapi_header; | |
707 | if(mheader->mapi_command_list) | |
708 | { | |
709 | struct Message **m; | |
710 | for (m = mheader->mapi_command_list; *m; ++m) | |
711 | mod_del_cmd(*m); | |
712 | } | |
713 | ||
714 | /* hook events are never removed, we simply lose the | |
715 | * ability to call them --fl | |
716 | */ | |
717 | if(mheader->mapi_hfn_list) | |
718 | { | |
719 | mapi_hfn_list_av1 *m; | |
720 | for (m = mheader->mapi_hfn_list; m->hapi_name; ++m) | |
721 | remove_hook(m->hapi_name, m->fn); | |
722 | } | |
723 | ||
724 | if(mheader->mapi_unregister) | |
725 | mheader->mapi_unregister(); | |
726 | break; | |
727 | } | |
728 | default: | |
729 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
730 | "Unknown/unsupported MAPI version %d when unloading %s!", | |
731 | modlist[modindex]->mapi_version, modlist[modindex]->name); | |
732 | ilog(L_MAIN, "Unknown/unsupported MAPI version %d when unloading %s!", | |
733 | modlist[modindex]->mapi_version, modlist[modindex]->name); | |
734 | break; | |
735 | } | |
736 | ||
737 | dlclose(modlist[modindex]->address); | |
738 | ||
637c4932 | 739 | rb_free(modlist[modindex]->name); |
f54e1a8f | 740 | memmove(&modlist[modindex], &modlist[modindex + 1], |
1e170010 | 741 | sizeof(struct module *) * ((num_mods - 1) - modindex)); |
212380e3 AC |
742 | |
743 | if(num_mods != 0) | |
744 | num_mods--; | |
745 | ||
746 | if(warn == 1) | |
747 | { | |
748 | ilog(L_MAIN, "Module %s unloaded", name); | |
749 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Module %s unloaded", name); | |
750 | } | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
755 | ||
756 | /* | |
757 | * load_a_module() | |
758 | * | |
759 | * inputs - path name of module, int to notice, int of core | |
760 | * output - -1 if error 0 if success | |
761 | * side effects - loads a module if successful | |
762 | */ | |
763 | int | |
764 | load_a_module(const char *path, int warn, int core) | |
765 | { | |
766 | void *tmpptr = NULL; | |
767 | ||
768 | char *mod_basename; | |
769 | const char *ver; | |
770 | ||
771 | int *mapi_version; | |
772 | ||
b7a689d1 | 773 | mod_basename = rb_basename(path); |
212380e3 AC |
774 | |
775 | #ifdef CHARYBDIS_PROFILE | |
d4db3063 | 776 | tmpptr = dlopen(path, RTLD_NOW | RTLD_LOCAL | RTLD_PROFILE); |
212380e3 | 777 | #else |
d4db3063 | 778 | tmpptr = dlopen(path, RTLD_NOW | RTLD_LOCAL); |
212380e3 AC |
779 | #endif |
780 | ||
781 | if(tmpptr == NULL) | |
782 | { | |
783 | const char *err = dlerror(); | |
784 | ||
785 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
786 | "Error loading module %s: %s", mod_basename, err); | |
787 | ilog(L_MAIN, "Error loading module %s: %s", mod_basename, err); | |
637c4932 | 788 | rb_free(mod_basename); |
212380e3 AC |
789 | return -1; |
790 | } | |
791 | ||
792 | ||
793 | /* | |
794 | * _mheader is actually a struct mapi_mheader_*, but mapi_version | |
795 | * is always the first member of this structure, so we treate it | |
796 | * as a single int in order to determine the API version. | |
797 | * -larne. | |
798 | */ | |
799 | mapi_version = (int *) (uintptr_t) dlsym(tmpptr, "_mheader"); | |
800 | if((mapi_version == NULL | |
801 | && (mapi_version = (int *) (uintptr_t) dlsym(tmpptr, "__mheader")) == NULL) | |
802 | || MAPI_MAGIC(*mapi_version) != MAPI_MAGIC_HDR) | |
803 | { | |
804 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
805 | "Data format error: module %s has no MAPI header.", | |
806 | mod_basename); | |
807 | ilog(L_MAIN, "Data format error: module %s has no MAPI header.", mod_basename); | |
808 | (void) dlclose(tmpptr); | |
637c4932 | 809 | rb_free(mod_basename); |
212380e3 AC |
810 | return -1; |
811 | } | |
812 | ||
813 | switch (MAPI_VERSION(*mapi_version)) | |
814 | { | |
815 | case 1: | |
816 | { | |
817 | struct mapi_mheader_av1 *mheader = (struct mapi_mheader_av1 *) mapi_version; /* see above */ | |
818 | if(mheader->mapi_register && (mheader->mapi_register() == -1)) | |
819 | { | |
820 | ilog(L_MAIN, "Module %s indicated failure during load.", | |
821 | mod_basename); | |
822 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
823 | "Module %s indicated failure during load.", | |
824 | mod_basename); | |
825 | dlclose(tmpptr); | |
637c4932 | 826 | rb_free(mod_basename); |
212380e3 AC |
827 | return -1; |
828 | } | |
829 | if(mheader->mapi_command_list) | |
830 | { | |
831 | struct Message **m; | |
832 | for (m = mheader->mapi_command_list; *m; ++m) | |
833 | mod_add_cmd(*m); | |
834 | } | |
835 | ||
836 | if(mheader->mapi_hook_list) | |
837 | { | |
838 | mapi_hlist_av1 *m; | |
839 | for (m = mheader->mapi_hook_list; m->hapi_name; ++m) | |
840 | *m->hapi_id = register_hook(m->hapi_name); | |
841 | } | |
842 | ||
843 | if(mheader->mapi_hfn_list) | |
844 | { | |
845 | mapi_hfn_list_av1 *m; | |
846 | for (m = mheader->mapi_hfn_list; m->hapi_name; ++m) | |
847 | add_hook(m->hapi_name, m->fn); | |
848 | } | |
849 | ||
850 | ver = mheader->mapi_module_version; | |
851 | break; | |
852 | } | |
853 | ||
854 | default: | |
855 | ilog(L_MAIN, "Module %s has unknown/unsupported MAPI version %d.", | |
856 | mod_basename, MAPI_VERSION(*mapi_version)); | |
857 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
858 | "Module %s has unknown/unsupported MAPI version %d.", | |
859 | mod_basename, *mapi_version); | |
860 | dlclose(tmpptr); | |
637c4932 | 861 | rb_free(mod_basename); |
212380e3 AC |
862 | return -1; |
863 | } | |
864 | ||
865 | if(ver == NULL) | |
866 | ver = unknown_ver; | |
867 | ||
868 | increase_modlist(); | |
869 | ||
eddc2ab6 | 870 | modlist[num_mods] = rb_malloc(sizeof(struct module)); |
212380e3 AC |
871 | modlist[num_mods]->address = tmpptr; |
872 | modlist[num_mods]->version = ver; | |
873 | modlist[num_mods]->core = core; | |
47a03750 | 874 | modlist[num_mods]->name = rb_strdup(mod_basename); |
212380e3 AC |
875 | modlist[num_mods]->mapi_header = mapi_version; |
876 | modlist[num_mods]->mapi_version = MAPI_VERSION(*mapi_version); | |
877 | num_mods++; | |
878 | ||
879 | if(warn == 1) | |
880 | { | |
881 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
882 | "Module %s [version: %s; MAPI version: %d] loaded at 0x%lx", | |
883 | mod_basename, ver, MAPI_VERSION(*mapi_version), | |
884 | (unsigned long) tmpptr); | |
885 | ilog(L_MAIN, "Module %s [version: %s; MAPI version: %d] loaded at 0x%lx", | |
886 | mod_basename, ver, MAPI_VERSION(*mapi_version), (unsigned long) tmpptr); | |
887 | } | |
637c4932 | 888 | rb_free(mod_basename); |
212380e3 AC |
889 | return 0; |
890 | } | |
891 | ||
892 | /* | |
893 | * increase_modlist | |
894 | * | |
895 | * inputs - NONE | |
896 | * output - NONE | |
897 | * side effects - expand the size of modlist if necessary | |
898 | */ | |
899 | static void | |
900 | increase_modlist(void) | |
901 | { | |
902 | struct module **new_modlist = NULL; | |
903 | ||
904 | if((num_mods + 1) < max_mods) | |
905 | return; | |
906 | ||
1e170010 | 907 | new_modlist = (struct module **) rb_malloc(sizeof(struct module *) * |
212380e3 | 908 | (max_mods + MODS_INCREMENT)); |
1e170010 | 909 | memcpy((void *) new_modlist, (void *) modlist, sizeof(struct module *) * num_mods); |
212380e3 | 910 | |
637c4932 | 911 | rb_free(modlist); |
212380e3 AC |
912 | modlist = new_modlist; |
913 | max_mods += MODS_INCREMENT; | |
914 | } | |
915 | ||
916 | #else /* STATIC_MODULES */ | |
917 | ||
918 | /* load_all_modules() | |
919 | * | |
920 | * input - | |
921 | * output - | |
922 | * side effects - all the msgtabs are added for static modules | |
923 | */ | |
924 | void | |
925 | load_all_modules(int warn) | |
926 | { | |
927 | load_static_modules(); | |
928 | } | |
929 | ||
930 | #endif /* STATIC_MODULES */ |