apps/irssi/src/core/commands.c

   1 /*
   2  commands.c : irssi
   3
   4     Copyright (C) 1999-2000 Timo Sirainen
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 */
  20
  21 #include "module.h"
  22 #include "signals.h"
  23 #include "commands.h"
  24 #include "misc.h"
  25 #include "special-vars.h"
  26 #include "window-item-def.h"
  27
  28 #include "servers.h"
  29 #include "channels.h"
  30
  31 #include "lib-config/iconfig.h"
  32 #include "settings.h"
  33
  34 GSList *commands;
  35 char *current_command;
  36
  37 static int signal_default_command;
  38
  39 static GSList *alias_runstack;
  40
  41 COMMAND_REC *command_find(const char *cmd)
  42 {
  43         GSList *tmp;
  44
  45         g_return_val_if_fail(cmd != NULL, NULL);
  46
  47         for (tmp = commands; tmp != NULL; tmp = tmp->next) {
  48                 COMMAND_REC *rec = tmp->data;
  49
  50                 if (g_strcasecmp(rec->cmd, cmd) == 0)
  51                         return rec;
  52         }
  53
  54         return NULL;
  55 }
  56
  57 static COMMAND_MODULE_REC *command_module_find(COMMAND_REC *rec,
  58                                                const char *module)
  59 {
  60         GSList *tmp;
  61
  62         g_return_val_if_fail(rec != NULL, NULL);
  63         g_return_val_if_fail(module != NULL, NULL);
  64
  65         for (tmp = rec->modules; tmp != NULL; tmp = tmp->next) {
  66                 COMMAND_MODULE_REC *rec = tmp->data;
  67
  68                 if (g_strcasecmp(rec->name, module) == 0)
  69                         return rec;
  70         }
  71
  72         return NULL;
  73 }
  74
  75 static COMMAND_MODULE_REC *
  76 command_module_find_and_remove(COMMAND_REC *rec, SIGNAL_FUNC func)
  77 {
  78         GSList *tmp, *tmp2;
  79
  80         g_return_val_if_fail(rec != NULL, NULL);
  81         g_return_val_if_fail(func != NULL, NULL);
  82
  83         for (tmp = rec->modules; tmp != NULL; tmp = tmp->next) {
  84                 COMMAND_MODULE_REC *rec = tmp->data;
  85
  86                 for (tmp2 = rec->callbacks; tmp2 != NULL; tmp2 = tmp2->next) {
  87                         COMMAND_CALLBACK_REC *cb = tmp2->data;
  88
  89                         if (cb->func == func) {
  90                                 rec->callbacks =
  91                                         g_slist_remove(rec->callbacks, cb);
  92                                 return rec;
  93                         }
  94                 }
  95         }
  96
  97         return NULL;
  98 }
  99
 100 int command_have_sub(const char *command)
 101 {
 102         GSList *tmp;
 103         int len;
 104
 105         g_return_val_if_fail(command != NULL, FALSE);
 106
 107         /* find "command "s */
 108         len = strlen(command);
 109         for (tmp = commands; tmp != NULL; tmp = tmp->next) {
 110                 COMMAND_REC *rec = tmp->data;
 111
 112                 if (g_strncasecmp(rec->cmd, command, len) == 0 &&
 113                     rec->cmd[len] == ' ')
 114                         return TRUE;
 115         }
 116
 117         return FALSE;
 118 }
 119
 120 static COMMAND_MODULE_REC *
 121 command_module_get(COMMAND_REC *rec, const char *module, int protocol)
 122 {
 123         COMMAND_MODULE_REC *modrec;
 124
 125         g_return_val_if_fail(rec != NULL, NULL);
 126
 127         modrec = command_module_find(rec, module);
 128         if (modrec == NULL) {
 129                 modrec = g_new0(COMMAND_MODULE_REC, 1);
 130                 modrec->name = g_strdup(module);
 131                 modrec->protocol = -1;
 132                 rec->modules = g_slist_append(rec->modules, modrec);
 133         }
 134
 135         if (protocol != -1)
 136                 modrec->protocol = protocol;
 137
 138         return modrec;
 139 }
 140
 141 void command_bind_full(const char *module, int priority, const char *cmd,
 142                        int protocol, const char *category, SIGNAL_FUNC func,
 143                        void *user_data)
 144 {
 145         COMMAND_REC *rec;
 146         COMMAND_MODULE_REC *modrec;
 147         COMMAND_CALLBACK_REC *cb;
 148         char *str;
 149
 150         g_return_if_fail(module != NULL);
 151         g_return_if_fail(cmd != NULL);
 152
 153         rec = command_find(cmd);
 154         if (rec == NULL) {
 155                 rec = g_new0(COMMAND_REC, 1);
 156                 rec->cmd = g_strdup(cmd);
 157                 rec->category = category == NULL ? NULL : g_strdup(category);
 158                 commands = g_slist_append(commands, rec);
 159         }
 160         modrec = command_module_get(rec, module, protocol);
 161
 162         cb = g_new0(COMMAND_CALLBACK_REC, 1);
 163         cb->func = func;
 164         cb->user_data = user_data;
 165         modrec->callbacks = g_slist_append(modrec->callbacks, cb);
 166
 167         if (func != NULL) {
 168                 str = g_strconcat("command ", cmd, NULL);
 169                 signal_add_full(module, priority, str, func, user_data);
 170                 g_free(str);
 171         }
 172
 173         signal_emit("commandlist new", 1, rec);
 174 }
 175
 176 static void command_free(COMMAND_REC *rec)
 177 {
 178         commands = g_slist_remove(commands, rec);
 179         signal_emit("commandlist remove", 1, rec);
 180
 181         g_free_not_null(rec->category);
 182         g_strfreev(rec->options);
 183         g_free(rec->cmd);
 184         g_free(rec);
 185 }
 186
 187 static void command_module_free(COMMAND_MODULE_REC *modrec, COMMAND_REC *rec)
 188 {
 189         rec->modules = g_slist_remove(rec->modules, modrec);
 190
 191         g_slist_foreach(modrec->callbacks, (GFunc) g_free, NULL);
 192         g_slist_free(modrec->callbacks);
 193         g_free(modrec->name);
 194         g_free_not_null(modrec->options);
 195         g_free(modrec);
 196 }
 197
 198 static void command_module_destroy(COMMAND_REC *rec,
 199                                    COMMAND_MODULE_REC *modrec)
 200 {
 201         GSList *tmp, *freelist;
 202
 203         command_module_free(modrec, rec);
 204
 205         /* command_set_options() might have added module declaration of it's
 206            own without any signals .. check if they're the only ones left
 207            and if so, destroy them. */
 208         freelist = NULL;
 209         for (tmp = rec->modules; tmp != NULL; tmp = tmp->next) {
 210                 COMMAND_MODULE_REC *rec = tmp->data;
 211
 212                 if (rec->callbacks == NULL)
 213                         freelist = g_slist_append(freelist, rec);
 214                 else {
 215                         g_slist_free(freelist);
 216                         freelist = NULL;
 217                         break;
 218                 }
 219         }
 220
 221         g_slist_foreach(freelist, (GFunc) command_module_free, rec);
 222         g_slist_free(freelist);
 223
 224         if (rec->modules == NULL)
 225                 command_free(rec);
 226 }
 227
 228 void command_unbind_full(const char *cmd, SIGNAL_FUNC func, void *user_data)
 229 {
 230         COMMAND_REC *rec;
 231         COMMAND_MODULE_REC *modrec;
 232         char *str;
 233
 234         g_return_if_fail(cmd != NULL);
 235         g_return_if_fail(func != NULL);
 236
 237         rec = command_find(cmd);
 238         if (rec != NULL) {
 239                 modrec = command_module_find_and_remove(rec, func);
 240                 g_return_if_fail(modrec != NULL);
 241
 242                 if (modrec->callbacks == NULL)
 243                         command_module_destroy(rec, modrec);
 244         }
 245
 246         str = g_strconcat("command ", cmd, NULL);
 247         signal_remove_data(str, func, user_data);
 248         g_free(str);
 249 }
 250
 251 /* Expand `cmd' - returns `cmd' if not found, NULL if more than one
 252    match is found */
 253 static const char *command_expand(char *cmd)
 254 {
 255         GSList *tmp;
 256         const char *match;
 257         int len, multiple;
 258
 259         g_return_val_if_fail(cmd != NULL, NULL);
 260
 261         multiple = FALSE;
 262         match = NULL;
 263         len = strlen(cmd);
 264         for (tmp = commands; tmp != NULL; tmp = tmp->next) {
 265                 COMMAND_REC *rec = tmp->data;
 266
 267                 if (g_strncasecmp(rec->cmd, cmd, len) == 0 &&
 268                     strchr(rec->cmd+len, ' ') == NULL) {
 269                         if (rec->cmd[len] == '\0') {
 270                                 /* full match */
 271                                 return rec->cmd;
 272                         }
 273
 274                         if (match != NULL) {
 275                                 /* multiple matches, we still need to check
 276                                    if there's some command left that is a
 277                                    full match.. */
 278                                 multiple = TRUE;
 279                         }
 280
 281                         /* check that this is the only match */
 282                         match = rec->cmd;
 283                 }
 284         }
 285
 286         if (multiple) {
 287                 signal_emit("error command", 2,
 288                             GINT_TO_POINTER(CMDERR_AMBIGUOUS), cmd);
 289                 return NULL;
 290         }
 291
 292         return match != NULL ? match : cmd;
 293 }
 294
 295 void command_runsub(const char *cmd, const char *data,
 296                     void *server, void *item)
 297 {
 298         const char *newcmd;
 299         char *orig, *subcmd, *defcmd, *args;
 300
 301         g_return_if_fail(data != NULL);
 302
 303         while (*data == ' ') data++;
 304
 305         if (*data == '\0') {
 306                 /* no subcommand given - list the subcommands */
 307                 signal_emit("list subcommands", 2, cmd);
 308                 return;
 309         }
 310
 311         /* get command.. */
 312         orig = subcmd = g_strdup_printf("command %s %s", cmd, data);
 313         args = strchr(subcmd+8 + strlen(cmd)+1, ' ');
 314         if (args != NULL) *args++ = '\0'; else args = "";
 315         while (*args == ' ') args++;
 316
 317         /* check if this command can be expanded */
 318         newcmd = command_expand(subcmd+8);
 319         if (newcmd == NULL) {
 320                 /* ambiguous command */
 321                 g_free(orig);
 322                 return;
 323         }
 324
 325         subcmd = g_strconcat("command ", newcmd, NULL);
 326
 327         g_strdown(subcmd);
 328         if (!signal_emit(subcmd, 3, args, server, item)) {
 329                 defcmd = g_strdup_printf("default command %s", cmd);
 330                 if (!signal_emit(defcmd, 3, data, server, item)) {
 331                         signal_emit("error command", 2,
 332                                     GINT_TO_POINTER(CMDERR_UNKNOWN), subcmd+8);
 333                 }
 334                 g_free(defcmd);
 335         }
 336
 337         g_free(subcmd);
 338         g_free(orig);
 339 }
 340
 341 static GSList *optlist_find(GSList *optlist, const char *option)
 342 {
 343         while (optlist != NULL) {
 344                 char *name = optlist->data;
 345                 if (iscmdtype(*name)) name++;
 346
 347                 if (g_strcasecmp(name, option) == 0)
 348                         return optlist;
 349
 350                 optlist = optlist->next;
 351         }
 352
 353         return NULL;
 354 }
 355
 356 int command_have_option(const char *cmd, const char *option)
 357 {
 358         COMMAND_REC *rec;
 359         char **tmp;
 360
 361         g_return_val_if_fail(cmd != NULL, FALSE);
 362         g_return_val_if_fail(option != NULL, FALSE);
 363
 364         rec = command_find(cmd);
 365         g_return_val_if_fail(rec != NULL, FALSE);
 366
 367         if (rec->options == NULL)
 368                 return FALSE;
 369
 370         for (tmp = rec->options; *tmp != NULL; tmp++) {
 371                 char *name = iscmdtype(**tmp) ? (*tmp)+1 : *tmp;
 372
 373                 if (g_strcasecmp(name, option) == 0)
 374                         return TRUE;
 375         }
 376
 377         return FALSE;
 378 }
 379
 380 static void command_calc_options(COMMAND_REC *rec, const char *options)
 381 {
 382         char **optlist, **tmp, *name, *str;
 383         GSList *list, *oldopt;
 384
 385         optlist = g_strsplit(options, " ", -1);
 386
 387         if (rec->options == NULL) {
 388                 /* first call - use specified args directly */
 389                 rec->options = optlist;
 390                 return;
 391         }
 392
 393         /* save old options to linked list */
 394         list = NULL;
 395         for (tmp = rec->options; *tmp != NULL; tmp++)
 396                 list = g_slist_append(list, g_strdup(*tmp));
 397         g_strfreev(rec->options);
 398
 399         /* merge the options */
 400         for (tmp = optlist; *tmp != NULL; tmp++) {
 401                 name = iscmdtype(**tmp) ? (*tmp)+1 : *tmp;
 402
 403                 oldopt = optlist_find(list, name);
 404                 if (oldopt != NULL) {
 405                         /* already specified - overwrite old defination */
 406                         g_free(oldopt->data);
 407                         oldopt->data = g_strdup(*tmp);
 408                 } else {
 409                         /* new option, append to list */
 410                         list = g_slist_append(list, g_strdup(*tmp));
 411                 }
 412         }
 413         g_strfreev(optlist);
 414
 415         /* linked list -> string[] */
 416         str = gslist_to_string(list, " ");
 417         rec->options = g_strsplit(str, " ", -1);
 418         g_free(str);
 419
 420         g_slist_foreach(list, (GFunc) g_free, NULL);
 421         g_slist_free(list);
 422 }
 423
 424 /* recalculate options to command from options in all modules */
 425 static void command_update_options(COMMAND_REC *rec)
 426 {
 427         GSList *tmp;
 428
 429         g_strfreev(rec->options);
 430         rec->options = NULL;
 431
 432         for (tmp = rec->modules; tmp != NULL; tmp = tmp->next) {
 433                 COMMAND_MODULE_REC *modrec = tmp->data;
 434
 435                 if (modrec->options != NULL)
 436                         command_calc_options(rec, modrec->options);
 437         }
 438 }
 439
 440 void command_set_options_module(const char *module,
 441                                 const char *cmd, const char *options)
 442 {
 443         COMMAND_REC *rec;
 444         COMMAND_MODULE_REC *modrec;
 445         int reload;
 446
 447         g_return_if_fail(module != NULL);
 448         g_return_if_fail(cmd != NULL);
 449         g_return_if_fail(options != NULL);
 450
 451         rec = command_find(cmd);
 452         g_return_if_fail(rec != NULL);
 453         modrec = command_module_get(rec, module, -1);
 454
 455         reload = modrec->options != NULL;
 456         if (reload) {
 457                 /* options already set for the module ..
 458                    we need to recalculate everything */
 459                 g_free(modrec->options);
 460         }
 461
 462         modrec->options = g_strdup(options);
 463
 464         if (reload)
 465                 command_update_options(rec);
 466         else
 467                 command_calc_options(rec, options);
 468 }
 469
 470 char *cmd_get_param(char **data)
 471 {
 472         char *pos;
 473
 474         g_return_val_if_fail(data != NULL, NULL);
 475         g_return_val_if_fail(*data != NULL, NULL);
 476
 477         while (**data == ' ') (*data)++;
 478         pos = *data;
 479
 480         while (**data != '\0' && **data != ' ') (*data)++;
 481         if (**data == ' ') *(*data)++ = '\0';
 482
 483         return pos;
 484 }
 485
 486 static char *cmd_get_quoted_param(char **data)
 487 {
 488         char *pos, quote;
 489
 490         g_return_val_if_fail(data != NULL, NULL);
 491         g_return_val_if_fail(*data != NULL, NULL);
 492
 493         while (**data == ' ') (*data)++;
 494         if (**data != '\'' && **data != '"')
 495                 return cmd_get_param(data);
 496
 497         quote = **data; (*data)++;
 498
 499         pos = *data;
 500         while (**data != '\0' && (**data != quote || (*data)[1] != ' ')) {
 501                 if (**data == '\\' && (*data)[1] != '\0')
 502                         g_memmove(*data, (*data)+1, strlen(*data));
 503                 (*data)++;
 504         }
 505
 506         if (**data == quote) {
 507                 *(*data)++ = '\0';
 508                 if (**data == ' ')
 509                         (*data)++;
 510         }
 511
 512         return pos;
 513 }
 514
 515 /* Find specified option from list of options - the `option' might be
 516    shortened version of the full command. Returns index where the
 517    option was found, -1 if not found or -2 if there was multiple matches. */
 518 static int option_find(char **array, const char *option)
 519 {
 520         char **tmp;
 521         int index, found, len, multiple;
 522
 523         g_return_val_if_fail(array != NULL, -1);
 524         g_return_val_if_fail(option != NULL, -1);
 525
 526         len = strlen(option);
 527
 528         found = -1; index = 0; multiple = FALSE;
 529         for (tmp = array; *tmp != NULL; tmp++, index++) {
 530                 const char *text = *tmp + iscmdtype(**tmp);
 531
 532                 if (g_strncasecmp(text, option, len) == 0) {
 533                         if (text[len] == '\0') {
 534                                 /* full match */
 535                                 return index;
 536                         }
 537
 538                         if (found != -1) {
 539                                 /* multiple matches - we still need to check
 540                                    if there's a full match left.. */
 541                                 multiple = TRUE;
 542                         }
 543
 544                         /* partial match, check that it's the only one */
 545                         found = index;
 546                 }
 547         }
 548
 549         if (multiple)
 550                 return -2;
 551
 552         return found;
 553 }
 554
 555 static int get_cmd_options(char **data, int ignore_unknown,
 556                            const char *cmd, GHashTable *options)
 557 {
 558         COMMAND_REC *rec;
 559         char *option, *arg, **optlist;
 560         int pos;
 561
 562         /* get option definations */
 563         rec = cmd == NULL ? NULL : command_find(cmd);
 564         optlist = rec == NULL ? NULL : rec->options;
 565
 566         option = NULL; pos = -1;
 567         for (;;) {
 568                 if (**data == '-') {
 569                         if (option != NULL && *optlist[pos] == '+') {
 570                                 /* required argument missing! */
 571                                 *data = optlist[pos] + 1;
 572                                 return CMDERR_OPTION_ARG_MISSING;
 573                         }
 574
 575                         (*data)++;
 576                         if (**data == '-' && i_isspace((*data)[1])) {
 577                                 /* -- option means end of options even
 578                                    if next word starts with - */
 579                                 (*data)++;
 580                                 while (i_isspace(**data)) (*data)++;
 581                                 break;
 582                         }
 583
 584                         if (**data == '\0')
 585                                 option = "-";
 586                         else if (!i_isspace(**data))
 587                                 option = cmd_get_param(data);
 588                         else {
 589                                 option = "-";
 590                                 (*data)++;
 591                         }
 592
 593                         /* check if this option can have argument */
 594                         pos = optlist == NULL ? -1 :
 595                                 option_find(optlist, option);
 596
 597                         if (pos == -1 && optlist != NULL &&
 598                             is_numeric(option, '\0')) {
 599                                 /* check if we want -<number> option */
 600                                 pos = option_find(optlist, "#");
 601                                 if (pos != -1) {
 602                                         g_hash_table_insert(options, "#",
 603                                                             option);
 604                                         pos = -3;
 605                                 }
 606                         }
 607
 608                         if (pos == -1 && !ignore_unknown) {
 609                                 /* unknown option! */
 610                                 *data = option;
 611                                 return CMDERR_OPTION_UNKNOWN;
 612                         }
 613                         if (pos == -2 && !ignore_unknown) {
 614                                 /* multiple matches */
 615                                 *data = option;
 616                                 return CMDERR_OPTION_AMBIGUOUS;
 617                         }
 618                         if (pos >= 0) {
 619                                 /* if we used a shortcut of parameter, put
 620                                    the whole parameter name in options table */
 621                                 option = optlist[pos] +
 622                                         iscmdtype(*optlist[pos]);
 623                         }
 624                         if (options != NULL && pos != -3)
 625                                 g_hash_table_insert(options, option, "");
 626
 627                         if (pos < 0 || !iscmdtype(*optlist[pos]) ||
 628                             *optlist[pos] == '!')
 629                                 option = NULL;
 630
 631                         while (i_isspace(**data)) (*data)++;
 632                         continue;
 633                 }
 634
 635                 if (option == NULL)
 636                         break;
 637
 638                 if (*optlist[pos] == '@' && !i_isdigit(**data))
 639                         break; /* expected a numeric argument */
 640
 641                 /* save the argument */
 642                 arg = cmd_get_quoted_param(data);
 643                 if (options != NULL) {
 644                         g_hash_table_remove(options, option);
 645                         g_hash_table_insert(options, option, arg);
 646                 }
 647                 option = NULL;
 648
 649                 while (i_isspace(**data)) (*data)++;
 650         }
 651
 652         return 0;
 653 }
 654
 655 typedef struct {
 656         char *data;
 657         GHashTable *options;
 658 } CMD_TEMP_REC;
 659
 660 static const char *
 661 get_optional_channel(WI_ITEM_REC *active_item, char **data, int require_name)
 662 {
 663         CHANNEL_REC *chanrec;
 664         const char *ret;
 665         char *tmp, *origtmp, *channel;
 666
 667         if (active_item == NULL) {
 668                 /* no active channel in window, channel required */
 669                 return cmd_get_param(data);
 670         }
 671
 672         origtmp = tmp = g_strdup(*data);
 673         channel = cmd_get_param(&tmp);
 674
 675         if (strcmp(channel, "*") == 0 && !require_name) {
 676                 /* "*" means active channel */
 677                 cmd_get_param(data);
 678                 ret = window_item_get_target(active_item);
 679         } else if (!server_ischannel(active_item->server, channel)) {
 680                 /* we don't have channel parameter - use active channel */
 681                 ret = window_item_get_target(active_item);
 682         } else {
 683                 /* Find the channel first and use it's name if found.
 684                    This allows automatic !channel -> !XXXXXchannel replaces. */
 685                 channel = cmd_get_param(data);
 686
 687                 chanrec = channel_find(active_item->server, channel);
 688                 ret = chanrec == NULL ? channel : chanrec->name;
 689         }
 690
 691         g_free(origtmp);
 692         return ret;
 693 }
 694
 695 int cmd_get_params(const char *data, gpointer *free_me, int count, ...)
 696 {
 697         WI_ITEM_REC *item;
 698         CMD_TEMP_REC *rec;
 699         GHashTable **opthash;
 700         char **str, *arg, *datad;
 701         va_list args;
 702         int cnt, error, ignore_unknown, require_name;
 703
 704         g_return_val_if_fail(data != NULL, FALSE);
 705
 706         va_start(args, count);
 707
 708         rec = g_new0(CMD_TEMP_REC, 1);
 709         rec->data = g_strdup(data);
 710         *free_me = rec;
 711
 712         datad = rec->data;
 713         error = FALSE;
 714
 715         item = (count & PARAM_FLAG_OPTCHAN) == 0 ? NULL:
 716                 (WI_ITEM_REC *) va_arg(args, WI_ITEM_REC *);
 717
 718         if (count & PARAM_FLAG_OPTIONS) {
 719                 arg = (char *) va_arg(args, char *);
 720                 opthash = (GHashTable **) va_arg(args, GHashTable **);
 721
 722                 rec->options = *opthash =
 723                         g_hash_table_new((GHashFunc) g_istr_hash,
 724                                          (GCompareFunc) g_istr_equal);
 725
 726                 ignore_unknown = count & PARAM_FLAG_UNKNOWN_OPTIONS;
 727                 error = get_cmd_options(&datad, ignore_unknown,
 728                                         arg, *opthash);
 729         }
 730
 731         if (!error) {
 732                 /* and now handle the string */
 733                 cnt = PARAM_WITHOUT_FLAGS(count);
 734                 if (count & PARAM_FLAG_OPTCHAN) {
 735                         /* optional channel as first parameter */
 736                         require_name = (count & PARAM_FLAG_OPTCHAN_NAME) ==
 737                                 PARAM_FLAG_OPTCHAN_NAME;
 738                         arg = (char *) get_optional_channel(item, &datad, require_name);
 739
 740                         str = (char **) va_arg(args, char **);
 741                         if (str != NULL) *str = arg;
 742                         cnt--;
 743                 }
 744
 745                 while (cnt-- > 0) {
 746                         if (cnt == 0 && count & PARAM_FLAG_GETREST) {
 747                                 /* get rest */
 748                                 arg = datad;
 749                         } else {
 750                                 arg = (count & PARAM_FLAG_NOQUOTES) ?
 751                                         cmd_get_param(&datad) :
 752                                         cmd_get_quoted_param(&datad);
 753                         }
 754
 755                         str = (char **) va_arg(args, char **);
 756                         if (str != NULL) *str = arg;
 757                 }
 758         }
 759         va_end(args);
 760
 761         if (error) {
 762                 signal_emit("error command", 2, GINT_TO_POINTER(error), datad);
 763                 signal_stop();
 764
 765                 cmd_params_free(rec);
 766                 *free_me = NULL;
 767         }
 768
 769         return !error;
 770 }
 771
 772 void cmd_params_free(void *free_me)
 773 {
 774         CMD_TEMP_REC *rec = free_me;
 775
 776         if (rec->options != NULL) g_hash_table_destroy(rec->options);
 777         g_free(rec->data);
 778         g_free(rec);
 779 }
 780
 781 static void command_module_unbind_all(COMMAND_REC *rec,
 782                                       COMMAND_MODULE_REC *modrec)
 783 {
 784         GSList *tmp, *next;
 785
 786         for (tmp = modrec->callbacks; tmp != NULL; tmp = next) {
 787                 COMMAND_CALLBACK_REC *cb = tmp->data;
 788                 next = tmp->next;
 789
 790                 command_unbind_full(rec->cmd, cb->func, cb->user_data);
 791         }
 792
 793         if (g_slist_find(commands, rec) != NULL) {
 794                 /* this module might have removed some options
 795                    from command, update them. */
 796                 command_update_options(rec);
 797         }
 798 }
 799
 800 void commands_remove_module(const char *module)
 801 {
 802         GSList *tmp, *next, *modlist;
 803
 804         g_return_if_fail(module != NULL);
 805
 806         for (tmp = commands; tmp != NULL; tmp = next) {
 807                 COMMAND_REC *rec = tmp->data;
 808
 809                 next = tmp->next;
 810                 modlist = gslist_find_string(rec->modules, module);
 811                 if (modlist != NULL)
 812                         command_module_unbind_all(rec, modlist->data);
 813         }
 814 }
 815
 816 static int cmd_protocol_match(COMMAND_REC *cmd, SERVER_REC *server)
 817 {
 818         GSList *tmp;
 819
 820         for (tmp = cmd->modules; tmp != NULL; tmp = tmp->next) {
 821                 COMMAND_MODULE_REC *rec = tmp->data;
 822
 823                 if (rec->protocol == -1) {
 824                         /* at least one module accepts the command
 825                            without specific protocol */
 826                         return 1;
 827                 }
 828
 829                 if (server != NULL && rec->protocol == server->chat_type) {
 830                         /* matching protocol found */
 831                         return 1;
 832                 }
 833         }
 834
 835         return 0;
 836 }
 837
 838 #define alias_runstack_push(alias) \
 839         alias_runstack = g_slist_append(alias_runstack, alias)
 840
 841 #define alias_runstack_pop(alias) \
 842         alias_runstack = g_slist_remove(alias_runstack, alias)
 843
 844 #define alias_runstack_find(alias) \
 845         (gslist_find_icase_string(alias_runstack, alias) != NULL)
 846
 847 static void parse_command(const char *command, int expand_aliases,
 848                           SERVER_REC *server, void *item)
 849 {
 850         COMMAND_REC *rec;
 851         const char *alias, *newcmd;
 852         char *cmd, *orig, *args, *oldcmd;
 853
 854         g_return_if_fail(command != NULL);
 855
 856         cmd = orig = g_strconcat("command ", command, NULL);
 857         args = strchr(cmd+8, ' ');
 858         if (args != NULL) *args++ = '\0'; else args = "";
 859
 860         /* check if there's an alias for command. Don't allow
 861            recursive aliases */
 862         alias = !expand_aliases || alias_runstack_find(cmd+8) ? NULL :
 863                 alias_find(cmd+8);
 864         if (alias != NULL) {
 865                 alias_runstack_push(cmd+8);
 866                 eval_special_string(alias, args, server, item);
 867                 alias_runstack_pop(cmd+8);
 868                 g_free(orig);
 869                 return;
 870         }
 871
 872         /* check if this command can be expanded */
 873         newcmd = command_expand(cmd+8);
 874         if (newcmd == NULL) {
 875                 /* ambiguous command */
 876                 g_free(orig);
 877                 return;
 878         }
 879
 880         rec = command_find(newcmd);
 881         if (rec != NULL && !cmd_protocol_match(rec, server)) {
 882                 g_free(orig);
 883
 884                 signal_emit("error command", 2,
 885                             GINT_TO_POINTER(server == NULL ?
 886                                             CMDERR_NOT_CONNECTED :
 887                                             CMDERR_ILLEGAL_PROTO));
 888                 return;
 889         }
 890
 891         cmd = g_strconcat("command ", newcmd, NULL);
 892         g_strdown(cmd);
 893
 894         oldcmd = current_command;
 895         current_command = cmd+8;
 896         if (server != NULL) server_ref(server);
 897         if (!signal_emit(cmd, 3, args, server, item)) {
 898                 signal_emit_id(signal_default_command, 3,
 899                                command, server, item);
 900         }
 901         if (server != NULL) {
 902                 if (server->connection_lost)
 903                         server_disconnect(server);
 904                 server_unref(server);
 905         }
 906         current_command = oldcmd;
 907
 908         g_free(cmd);
 909         g_free(orig);
 910 }
 911
 912 static void event_command(const char *line, SERVER_REC *server, void *item)
 913 {
 914         char *cmdchar;
 915         int expand_aliases = TRUE;
 916
 917         g_return_if_fail(line != NULL);
 918
 919         cmdchar = *line == '\0' ? NULL :
 920                 strchr(settings_get_str("cmdchars"), *line);
 921         if (cmdchar != NULL && line[1] == ' ') {
 922                 /* "/ text" = same as sending "text" to active channel. */
 923                 line += 2;
 924                 cmdchar = NULL;
 925         }
 926         if (cmdchar == NULL) {
 927                 /* non-command - let someone else handle this */
 928                 signal_emit("send text", 3, line, server, item);
 929                 return;
 930         }
 931
 932         /* same cmdchar twice ignores aliases ignores aliases */
 933         line++;
 934         if (*line == *cmdchar) {
 935                 line++;
 936                 expand_aliases = FALSE;
 937         }
 938
 939         /* ^command hides the output - we'll do this at fe-common but
 940            we have to skip the ^ char here.. */
 941         if (*line == '^') line++;
 942
 943         parse_command(line, expand_aliases, server, item);
 944 }
 945
 946 /* SYNTAX: EVAL <command(s)> */
 947 static void cmd_eval(const char *data, SERVER_REC *server, void *item)
 948 {
 949         g_return_if_fail(data != NULL);
 950
 951         eval_special_string(data, "", server, item);
 952 }
 953
 954 /* SYNTAX: CD <directory> */
 955 static void cmd_cd(const char *data)
 956 {
 957         char *str;
 958
 959         g_return_if_fail(data != NULL);
 960         if (*data == '\0') return;
 961
 962         str = convert_home(data);
 963         chdir(str);
 964         g_free(str);
 965 }
 966
 967 void commands_init(void)
 968 {
 969         commands = NULL;
 970         current_command = NULL;
 971         alias_runstack = NULL;
 972
 973         signal_default_command = signal_get_uniq_id("default command");
 974
 975         settings_add_str("misc", "cmdchars", "/");
 976         signal_add("send command", (SIGNAL_FUNC) event_command);
 977
 978         command_bind("eval", NULL, (SIGNAL_FUNC) cmd_eval);
 979         command_bind("cd", NULL, (SIGNAL_FUNC) cmd_cd);
 980 }
 981
 982 void commands_deinit(void)
 983 {
 984         g_free_not_null(current_command);
 985
 986         signal_remove("send command", (SIGNAL_FUNC) event_command);
 987
 988         command_unbind("eval", (SIGNAL_FUNC) cmd_eval);
 989         command_unbind("cd", (SIGNAL_FUNC) cmd_cd);
 990 }