messages.c

   1 /* Copyright (c) 2012-2014, Bastien Dejean
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * 1. Redistributions of source code must retain the above copyright notice, this
   8  *    list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright notice,
  10  *    this list of conditions and the following disclaimer in the documentation
  11  *    and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
  17  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  20  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  * The views and conclusions contained in the software and documentation are those
  25  * of the authors and should not be interpreted as representing official policies,
  26  * either expressed or implied, of the FreeBSD Project.
  27  */
  28
  29 #include <errno.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include "bspwm.h"
  34 #include "desktop.h"
  35 #include "ewmh.h"
  36 #include "history.h"
  37 #include "monitor.h"
  38 #include "pointer.h"
  39 #include "query.h"
  40 #include "rule.h"
  41 #include "restore.h"
  42 #include "settings.h"
  43 #include "tree.h"
  44 #include "window.h"
  45 #include "common.h"
  46 #include "subscribe.h"
  47 #include "messages.h"
  48
  49 int handle_message(char *msg, int msg_len, FILE *rsp)
  50 {
  51         int cap = INIT_CAP;
  52         int num = 0;
  53         char **args = malloc(cap * sizeof(char *));
  54         if (args == NULL)
  55                 return MSG_FAILURE;
  56
  57         for (int i = 0, j = 0; i < msg_len; i++) {
  58                 if (msg[i] == 0) {
  59                         args[num++] = msg + j;
  60                         j = i + 1;
  61                 }
  62                 if (num >= cap) {
  63                         cap *= 2;
  64                         char **new = realloc(args, cap * sizeof(char *));
  65                         if (new == NULL) {
  66                                 free(args);
  67                                 return MSG_FAILURE;
  68                         } else {
  69                                 args = new;
  70                         }
  71                 }
  72         }
  73
  74         if (num < 1) {
  75                 free(args);
  76                 return MSG_SYNTAX;
  77         }
  78
  79         char **args_orig = args;
  80         int ret = process_message(args, num, rsp);
  81         free(args_orig);
  82         return ret;
  83 }
  84
  85 int process_message(char **args, int num, FILE *rsp)
  86 {
  87         if (streq("window", *args)) {
  88                 return cmd_window(++args, --num);
  89         } else if (streq("desktop", *args)) {
  90                 return cmd_desktop(++args, --num);
  91         } else if (streq("monitor", *args)) {
  92                 return cmd_monitor(++args, --num);
  93         } else if (streq("query", *args)) {
  94                 return cmd_query(++args, --num, rsp);
  95         } else if (streq("restore", *args)) {
  96                 return cmd_restore(++args, --num);
  97         } else if (streq("control", *args)) {
  98                 return cmd_control(++args, --num, rsp);
  99         } else if (streq("rule", *args)) {
 100                 return cmd_rule(++args, --num, rsp);
 101         } else if (streq("pointer", *args)) {
 102                 return cmd_pointer(++args, --num);
 103         } else if (streq("config", *args)) {
 104                 return cmd_config(++args, --num, rsp);
 105         } else if (streq("quit", *args)) {
 106                 return cmd_quit(++args, --num);
 107         }
 108
 109         return MSG_UNKNOWN;
 110 }
 111
 112 int cmd_window(char **args, int num)
 113 {
 114         if (num < 1)
 115                 return MSG_SYNTAX;
 116
 117         coordinates_t ref = {mon, mon->desk, mon->desk->focus};
 118         coordinates_t trg = ref;
 119
 120         if ((*args)[0] != OPT_CHR) {
 121                 if (node_from_desc(*args, &ref, &trg))
 122                         num--, args++;
 123                 else
 124                         return MSG_FAILURE;
 125         }
 126
 127         if (trg.node == NULL)
 128                 return MSG_FAILURE;
 129
 130         bool dirty = false;
 131
 132         while (num > 0) {
 133                 if (streq("-f", *args) || streq("--focus", *args)) {
 134                         coordinates_t dst = trg;
 135                         if (num > 1 && *(args + 1)[0] != OPT_CHR) {
 136                                 num--, args++;
 137                                 if (!node_from_desc(*args, &trg, &dst))
 138                                         return MSG_FAILURE;
 139                         }
 140                         focus_node(dst.monitor, dst.desktop, dst.node);
 141                 } else if (streq("-d", *args) || streq("--to-desktop", *args)) {
 142                         num--, args++;
 143                         coordinates_t dst;
 144                         if (desktop_from_desc(*args, &trg, &dst)) {
 145                                 if (transfer_node(trg.monitor, trg.desktop, trg.node, dst.monitor, dst.desktop, dst.desktop->focus)) {
 146                                         trg.monitor = dst.monitor;
 147                                         trg.desktop = dst.desktop;
 148                                 }
 149                         } else {
 150                                 return MSG_FAILURE;
 151                         }
 152                 } else if (streq("-m", *args) || streq("--to-monitor", *args)) {
 153                         num--, args++;
 154                         if (num < 1)
 155                                 return MSG_SYNTAX;
 156                         coordinates_t dst;
 157                         if (monitor_from_desc(*args, &trg, &dst)) {
 158                                 if (transfer_node(trg.monitor, trg.desktop, trg.node, dst.monitor, dst.monitor->desk, dst.monitor->desk->focus)) {
 159                                         trg.monitor = dst.monitor;
 160                                         trg.desktop = dst.monitor->desk;
 161                                 }
 162                         } else {
 163                                 return MSG_FAILURE;
 164                         }
 165                 } else if (streq("-w", *args) || streq("--to-window", *args)) {
 166                         num--, args++;
 167                         if (num < 1)
 168                                 return MSG_SYNTAX;
 169                         coordinates_t dst;
 170                         if (node_from_desc(*args, &trg, &dst)) {
 171                                 if (transfer_node(trg.monitor, trg.desktop, trg.node, dst.monitor, dst.desktop, dst.node)) {
 172                                         trg.monitor = dst.monitor;
 173                                         trg.desktop = dst.desktop;
 174                                 }
 175                         } else {
 176                                 return MSG_FAILURE;
 177                         }
 178                 } else if (streq("-s", *args) || streq("--swap", *args)) {
 179                         num--, args++;
 180                         if (num < 1)
 181                                 return MSG_SYNTAX;
 182                         coordinates_t dst;
 183                         if (node_from_desc(*args, &trg, &dst)) {
 184                                 if (swap_nodes(trg.monitor, trg.desktop, trg.node, dst.monitor, dst.desktop, dst.node)) {
 185                                         if (trg.desktop != dst.desktop)
 186                                                 arrange(trg.monitor, trg.desktop);
 187                                         trg.monitor = dst.monitor;
 188                                         trg.desktop = dst.desktop;
 189                                         dirty = true;
 190                                 }
 191                         } else {
 192                                 return MSG_FAILURE;
 193                         }
 194                 } else if (streq("-t", *args) || streq("--toggle", *args)) {
 195                         num--, args++;
 196                         if (num < 1)
 197                                 return MSG_SYNTAX;
 198                         char *key = strtok(*args, EQL_TOK);
 199                         char *val = strtok(NULL, EQL_TOK);
 200                         alter_state_t a;
 201                         bool b;
 202                         if (val == NULL) {
 203                                 a = ALTER_TOGGLE;
 204                         } else {
 205                                 if (parse_bool(val, &b))
 206                                         a = ALTER_SET;
 207                                 else
 208                                         return MSG_FAILURE;
 209                         }
 210                         if (streq("fullscreen", key)) {
 211                                 set_fullscreen(trg.node, (a == ALTER_SET ? b : !trg.node->client->fullscreen));
 212                                 dirty = true;
 213                         } else if (streq("pseudo_tiled", key)) {
 214                                 set_pseudo_tiled(trg.node, (a == ALTER_SET ? b : !trg.node->client->pseudo_tiled));
 215                                 dirty = true;
 216                         } else if (streq("floating", key)) {
 217                                 set_floating(trg.node, (a == ALTER_SET ? b : !trg.node->client->floating));
 218                                 dirty = true;
 219                         } else if (streq("locked", key)) {
 220                                 set_locked(trg.monitor, trg.desktop, trg.node, (a == ALTER_SET ? b : !trg.node->client->locked));
 221                         } else if (streq("sticky", key)) {
 222                                 set_sticky(trg.monitor, trg.desktop, trg.node, (a == ALTER_SET ? b : !trg.node->client->sticky));
 223                         } else if (streq("private", key)) {
 224                                 set_private(trg.monitor, trg.desktop, trg.node, (a == ALTER_SET ? b : !trg.node->client->private));
 225                         } else {
 226                                 return MSG_FAILURE;
 227                         }
 228                 } else if (streq("-p", *args) || streq("--presel", *args)) {
 229                         num--, args++;
 230                         if (num < 1)
 231                                 return MSG_SYNTAX;
 232                         if (!is_tiled(trg.node->client) ||
 233                             trg.desktop->layout != LAYOUT_TILED)
 234                                 return MSG_FAILURE;
 235                         if (streq("cancel", *args)) {
 236                                 reset_mode(&trg);
 237                         } else {
 238                                 direction_t dir;
 239                                 if (parse_direction(*args, &dir)) {
 240                                         double rat = trg.node->split_ratio;
 241                                         if (num > 1 && *(args + 1)[0] != OPT_CHR) {
 242                                                 num--, args++;
 243                                                 if (sscanf(*args, "%lf", &rat) != 1 || rat <= 0 || rat >= 1)
 244                                                         return MSG_FAILURE;
 245                                         }
 246                                         if (auto_cancel && trg.node->split_mode == MODE_MANUAL &&
 247                                             dir == trg.node->split_dir &&
 248                                             rat == trg.node->split_ratio) {
 249                                                 reset_mode(&trg);
 250                                         } else {
 251                                                 trg.node->split_mode = MODE_MANUAL;
 252                                                 trg.node->split_dir = dir;
 253                                                 trg.node->split_ratio = rat;
 254                                         }
 255                                         window_draw_border(trg.node, trg.desktop->focus == trg.node, mon == trg.monitor);
 256                                 } else {
 257                                         return MSG_FAILURE;
 258                                 }
 259                         }
 260                 } else if (streq("-e", *args) || streq("--edge", *args)) {
 261                         num--, args++;
 262                         if (num < 2)
 263                                 return MSG_SYNTAX;
 264                         direction_t dir;
 265                         if (!parse_direction(*args, &dir))
 266                                 return MSG_FAILURE;
 267                         node_t *n = find_fence(trg.node, dir);
 268                         if (n == NULL)
 269                                 return MSG_FAILURE;
 270                         num--, args++;
 271                         if ((*args)[0] == '+' || (*args)[0] == '-') {
 272                                 int pix;
 273                                 if (sscanf(*args, "%i", &pix) == 1) {
 274                                         int max = (n->split_type == TYPE_HORIZONTAL ? n->rectangle.height : n->rectangle.width);
 275                                         double rat = ((max * n->split_ratio) + pix) / max;
 276                                         if (rat > 0 && rat < 1)
 277                                                 n->split_ratio = rat;
 278                                         else
 279                                                 return MSG_FAILURE;
 280                                 } else {
 281                                         return MSG_FAILURE;
 282                                 }
 283                         } else {
 284                                 double rat;
 285                                 if (sscanf(*args, "%lf", &rat) == 1 && rat > 0 && rat < 1)
 286                                         n->split_ratio = rat;
 287                                 else
 288                                         return MSG_FAILURE;
 289                         }
 290                         dirty = true;
 291                 } else if (streq("-r", *args) || streq("--ratio", *args)) {
 292                         num--, args++;
 293                         if (num < 1)
 294                                 return MSG_SYNTAX;
 295                         double rat;
 296                         if (sscanf(*args, "%lf", &rat) == 1 && rat > 0 && rat < 1) {
 297                                 trg.node->split_ratio = rat;
 298                                 window_draw_border(trg.node, trg.desktop->focus == trg.node, mon == trg.monitor);
 299                         } else {
 300                                 return MSG_FAILURE;
 301                         }
 302                 } else if (streq("-R", *args) || streq("--rotate", *args)) {
 303                         num--, args++;
 304                         if (num < 2)
 305                                 return MSG_SYNTAX;
 306                         direction_t dir;
 307                         if (!parse_direction(*args, &dir))
 308                                 return MSG_FAILURE;
 309                         node_t *n = find_fence(trg.node, dir);
 310                         if (n == NULL)
 311                                 return MSG_FAILURE;
 312                         num--, args++;
 313                         int deg;
 314                         if (parse_degree(*args, &deg)) {
 315                                 rotate_tree(n, deg);
 316                                 dirty = true;
 317                         } else {
 318                                 return MSG_FAILURE;
 319                         }
 320                 } else if (streq("-c", *args) || streq("--close", *args)) {
 321                         if (num > 1)
 322                                 return MSG_SYNTAX;
 323                         window_close(trg.node);
 324                 } else if (streq("-k", *args) || streq("--kill", *args)) {
 325                         if (num > 1)
 326                                 return MSG_SYNTAX;
 327                         window_kill(trg.monitor, trg.desktop, trg.node);
 328                         dirty = true;
 329                 } else {
 330                         return MSG_SYNTAX;
 331                 }
 332
 333                 num--, args++;
 334         }
 335
 336         if (dirty)
 337                 arrange(trg.monitor, trg.desktop);
 338
 339         return MSG_SUCCESS;
 340 }
 341
 342 int cmd_desktop(char **args, int num)
 343 {
 344         if (num < 1)
 345                 return MSG_SYNTAX;
 346
 347         coordinates_t ref = {mon, mon->desk, NULL};
 348         coordinates_t trg = ref;
 349
 350         if ((*args)[0] != OPT_CHR) {
 351                 if (desktop_from_desc(*args, &ref, &trg))
 352                         num--, args++;
 353                 else
 354                         return MSG_FAILURE;
 355         }
 356
 357         bool dirty = false;
 358
 359         while (num > 0) {
 360                 if (streq("-f", *args) || streq("--focus", *args)) {
 361                         coordinates_t dst = trg;
 362                         if (num > 1 && *(args + 1)[0] != OPT_CHR) {
 363                                 num--, args++;
 364                                 if (!desktop_from_desc(*args, &trg, &dst))
 365                                         return MSG_FAILURE;
 366                         }
 367                         if (auto_alternate && dst.desktop == mon->desk) {
 368                                 desktop_select_t sel = {DESKTOP_STATUS_ALL, false, false};
 369                                 history_find_desktop(HISTORY_OLDER, &trg, &dst, sel);
 370                         }
 371                         focus_node(dst.monitor, dst.desktop, dst.desktop->focus);
 372                 } else if (streq("-m", *args) || streq("--to-monitor", *args)) {
 373                         num--, args++;
 374                         if (num < 1)
 375                                 return MSG_SYNTAX;
 376                         if (trg.monitor->desk_head == trg.monitor->desk_tail)
 377                                 return MSG_FAILURE;
 378                         coordinates_t dst;
 379                         if (monitor_from_desc(*args, &trg, &dst)) {
 380                                 transfer_desktop(trg.monitor, dst.monitor, trg.desktop);
 381                                 trg.monitor = dst.monitor;
 382                                 update_current();
 383                         } else {
 384                                 return MSG_FAILURE;
 385                         }
 386                 } else if (streq("-s", *args) || streq("--swap", *args)) {
 387                         num--, args++;
 388                         if (num < 1)
 389                                 return MSG_SYNTAX;
 390                         coordinates_t dst;
 391                         if (desktop_from_desc(*args, &trg, &dst))
 392                                 swap_desktops(trg.monitor, trg.desktop, dst.monitor, dst.desktop);
 393                         else
 394                                 return MSG_FAILURE;
 395                 } else if (streq("-l", *args) || streq("--layout", *args)) {
 396                         num--, args++;
 397                         if (num < 1)
 398                                 return MSG_SYNTAX;
 399                         layout_t lyt;
 400                         cycle_dir_t cyc;
 401                         if (parse_cycle_direction(*args, &cyc))
 402                                 change_layout(trg.monitor, trg.desktop, (trg.desktop->layout + 1) % 2);
 403                         else if (parse_layout(*args, &lyt))
 404                                 change_layout(trg.monitor, trg.desktop, lyt);
 405                         else
 406                                 return MSG_FAILURE;
 407                 } else if (streq("-n", *args) || streq("--rename", *args)) {
 408                         num--, args++;
 409                         if (num < 1)
 410                                 return MSG_SYNTAX;
 411                         snprintf(trg.desktop->name, sizeof(trg.desktop->name), "%s", *args);
 412                         ewmh_update_desktop_names();
 413                         put_status();
 414                 } else if (streq("-r", *args) || streq("--remove", *args)) {
 415                         if (trg.desktop->root == NULL &&
 416                             trg.monitor->desk_head != trg.monitor->desk_tail) {
 417                                 remove_desktop(trg.monitor, trg.desktop);
 418                                 show_desktop(trg.monitor->desk);
 419                                 update_current();
 420                                 return MSG_SUCCESS;
 421                         } else {
 422                                 return MSG_FAILURE;
 423                         }
 424                 } else if (streq("-c", *args) || streq("--cancel-presel", *args)) {
 425                         reset_mode(&trg);
 426                 } else if (streq("-F", *args) || streq("--flip", *args)) {
 427                         num--, args++;
 428                         if (num < 1)
 429                                 return MSG_SYNTAX;
 430                         flip_t flp;
 431                         if (parse_flip(*args, &flp)) {
 432                                 flip_tree(trg.desktop->root, flp);
 433                                 dirty = true;
 434                         } else {
 435                                 return MSG_FAILURE;
 436                         }
 437                 } else if (streq("-R", *args) || streq("--rotate", *args)) {
 438                         num--, args++;
 439                         if (num < 1)
 440                                 return MSG_SYNTAX;
 441                         int deg;
 442                         if (parse_degree(*args, &deg)) {
 443                                 rotate_tree(trg.desktop->root, deg);
 444                                 dirty = true;
 445                         } else {
 446                                 return MSG_FAILURE;
 447                         }
 448                 } else if (streq("-E", *args) || streq("--equalize", *args)) {
 449                         equalize_tree(trg.desktop->root);
 450                         dirty = true;
 451                 } else if (streq("-B", *args) || streq("--balance", *args)) {
 452                         balance_tree(trg.desktop->root);
 453                         dirty = true;
 454                 } else if (streq("-C", *args) || streq("--circulate", *args)) {
 455                         num--, args++;
 456                         if (num < 1)
 457                                 return MSG_SYNTAX;
 458                         circulate_dir_t cir;
 459                         if (parse_circulate_direction(*args, &cir)) {
 460                                 circulate_leaves(trg.monitor, trg.desktop, cir);
 461                                 dirty = true;
 462                         } else {
 463                                 return MSG_FAILURE;
 464                         }
 465                 } else if (streq("-t", *args) || streq("--toggle", *args)) {
 466                         num--, args++;
 467                         if (num < 1)
 468                                 return MSG_SYNTAX;
 469                         char *key = strtok(*args, EQL_TOK);
 470                         char *val = strtok(NULL, EQL_TOK);
 471                         alter_state_t a;
 472                         bool b;
 473                         if (val == NULL) {
 474                                 a = ALTER_TOGGLE;
 475                         } else {
 476                                 if (parse_bool(val, &b))
 477                                         a = ALTER_SET;
 478                                 else
 479                                         return MSG_FAILURE;
 480                         }
 481                         if (streq("floating", key))
 482                                 trg.desktop->floating = (a == ALTER_SET ? b : !trg.desktop->floating);
 483                         else
 484                                 return MSG_FAILURE;
 485                 } else {
 486                         return MSG_SYNTAX;
 487                 }
 488                 num--, args++;
 489         }
 490
 491         if (dirty)
 492                 arrange(trg.monitor, trg.desktop);
 493
 494         return MSG_SUCCESS;
 495 }
 496
 497 int cmd_monitor(char **args, int num)
 498 {
 499         if (num < 1)
 500                 return MSG_SYNTAX;
 501
 502         coordinates_t ref = {mon, NULL, NULL};
 503         coordinates_t trg = ref;
 504
 505         if ((*args)[0] != OPT_CHR) {
 506                 if (monitor_from_desc(*args, &ref, &trg))
 507                         num--, args++;
 508                 else
 509                         return MSG_FAILURE;
 510         }
 511
 512         while (num > 0) {
 513                 if (streq("-f", *args) || streq("--focus", *args)) {
 514                         coordinates_t dst = trg;
 515                         if (num > 1 && *(args + 1)[0] != OPT_CHR) {
 516                                 num--, args++;
 517                                 if (!monitor_from_desc(*args, &trg, &dst))
 518                                         return MSG_FAILURE;
 519                         }
 520                         if (auto_alternate && dst.monitor == mon) {
 521                                 desktop_select_t sel = {DESKTOP_STATUS_ALL, false, false};
 522                                 history_find_monitor(HISTORY_OLDER, &trg, &dst, sel);
 523                         }
 524                         focus_node(dst.monitor, dst.monitor->desk, dst.monitor->desk->focus);
 525                 } else if (streq("-d", *args) || streq("--reset-desktops", *args)) {
 526                         num--, args++;
 527                         if (num < 1)
 528                                 return MSG_SYNTAX;
 529                         desktop_t *d = trg.monitor->desk_head;
 530                         while (num > 0 && d != NULL) {
 531                                 snprintf(d->name, sizeof(d->name), "%s", *args);
 532                                 d = d->next;
 533                                 num--, args++;
 534                         }
 535                         put_status();
 536                         while (num > 0) {
 537                                 add_desktop(trg.monitor, make_desktop(*args));
 538                                 num--, args++;
 539                         }
 540                         while (d != NULL) {
 541                                 desktop_t *next = d->next;
 542                                 if (d == mon->desk)
 543                                         focus_node(trg.monitor, d->prev, d->prev->focus);
 544                                 merge_desktops(trg.monitor, d, mon, mon->desk);
 545                                 remove_desktop(trg.monitor, d);
 546                                 d = next;
 547                         }
 548                 } else if (streq("-a", *args) || streq("--add-desktops", *args)) {
 549                         num--, args++;
 550                         if (num < 1)
 551                                 return MSG_SYNTAX;
 552                         while (num > 0) {
 553                                 add_desktop(trg.monitor, make_desktop(*args));
 554                                 num--, args++;
 555                         }
 556                 } else if (streq("-r", *args) || streq("--remove-desktops", *args)) {
 557                         num--, args++;
 558                         if (num < 1)
 559                                 return MSG_SYNTAX;
 560                         while (num > 0) {
 561                                 coordinates_t dst;
 562                                 if (locate_desktop(*args, &dst) && dst.monitor->desk_head != dst.monitor->desk_tail && dst.desktop->root == NULL) {
 563                                         remove_desktop(dst.monitor, dst.desktop);
 564                                         show_desktop(dst.monitor->desk);
 565                                 }
 566                                 num--, args++;
 567                         }
 568                 } else if (streq("-o", *args) || streq("--order-desktops", *args)) {
 569                         num--, args++;
 570                         if (num < 1)
 571                                 return MSG_SYNTAX;
 572                         desktop_t *d = trg.monitor->desk_head;
 573                         while (d != NULL && num > 0) {
 574                                 desktop_t *next = d->next;
 575                                 coordinates_t dst;
 576                                 if (locate_desktop(*args, &dst) && dst.monitor == trg.monitor) {
 577                                         swap_desktops(trg.monitor, d, dst.monitor, dst.desktop);
 578                                         if (next == dst.desktop)
 579                                                 next = d;
 580                                 }
 581                                 d = next;
 582                                 num--, args++;
 583                         }
 584                 } else if (streq("-n", *args) || streq("--rename", *args)) {
 585                         num--, args++;
 586                         if (num < 1)
 587                                 return MSG_SYNTAX;
 588                         snprintf(trg.monitor->name, sizeof(trg.monitor->name), "%s", *args);
 589                         put_status();
 590                 } else if (streq("-s", *args) || streq("--swap", *args)) {
 591                         num--, args++;
 592                         if (num < 1)
 593                                 return MSG_SYNTAX;
 594                         coordinates_t dst;
 595                         if (monitor_from_desc(*args, &trg, &dst))
 596                                 swap_monitors(trg.monitor, dst.monitor);
 597                         else
 598                                 return MSG_FAILURE;
 599                 } else {
 600                         return MSG_SYNTAX;
 601                 }
 602                 num--, args++;
 603         }
 604
 605         return MSG_SUCCESS;
 606 }
 607
 608 int cmd_query(char **args, int num, FILE *rsp)
 609 {
 610         coordinates_t ref = {mon, mon->desk, mon->desk->focus};
 611         coordinates_t trg = {NULL, NULL, NULL};
 612         domain_t dom = DOMAIN_TREE;
 613         int d = 0, t = 0;
 614
 615         while (num > 0) {
 616                 if (streq("-T", *args) || streq("--tree", *args)) {
 617                         dom = DOMAIN_TREE, d++;
 618                 } else if (streq("-M", *args) || streq("--monitors", *args)) {
 619                         dom = DOMAIN_MONITOR, d++;
 620                 } else if (streq("-D", *args) || streq("--desktops", *args)) {
 621                         dom = DOMAIN_DESKTOP, d++;
 622                 } else if (streq("-W", *args) || streq("--windows", *args)) {
 623                         dom = DOMAIN_WINDOW, d++;
 624                 } else if (streq("-H", *args) || streq("--history", *args)) {
 625                         dom = DOMAIN_HISTORY, d++;
 626                 } else if (streq("-S", *args) || streq("--stack", *args)) {
 627                         dom = DOMAIN_STACK, d++;
 628                 } else if (streq("-m", *args) || streq("--monitor", *args)) {
 629                         trg.monitor = ref.monitor;
 630                         if (num > 1 && *(args + 1)[0] != OPT_CHR) {
 631                                 num--, args++;
 632                                 if (!monitor_from_desc(*args, &ref, &trg))
 633                                         return MSG_FAILURE;
 634                         }
 635                         t++;
 636                 } else if (streq("-d", *args) || streq("--desktop", *args)) {
 637                         trg.monitor = ref.monitor;
 638                         trg.desktop = ref.desktop;
 639                         if (num > 1 && *(args + 1)[0] != OPT_CHR) {
 640                                 num--, args++;
 641                                 if (!desktop_from_desc(*args, &ref, &trg))
 642                                         return MSG_FAILURE;
 643                         }
 644                         t++;
 645                 } else if (streq("-w", *args) || streq("--window", *args)) {
 646                         trg = ref;
 647                         if (num > 1 && *(args + 1)[0] != OPT_CHR) {
 648                                 num--, args++;
 649                                 if (!node_from_desc(*args, &ref, &trg))
 650                                         return MSG_FAILURE;
 651                         }
 652                         t++;
 653                 } else {
 654                         return MSG_SYNTAX;
 655                 }
 656                 num--, args++;
 657         }
 658
 659         if (d != 1 || t > 1)
 660                 return MSG_SYNTAX;
 661
 662         if (dom == DOMAIN_HISTORY)
 663                 query_history(trg, rsp);
 664         else if (dom == DOMAIN_STACK)
 665                 query_stack(rsp);
 666         else if (dom == DOMAIN_WINDOW)
 667                 query_windows(trg, rsp);
 668         else
 669                 query_monitors(trg, dom, rsp);
 670
 671         return MSG_SUCCESS;
 672 }
 673
 674 int cmd_rule(char **args, int num, FILE *rsp)
 675 {
 676         if (num < 1)
 677                 return MSG_SYNTAX;
 678         while (num > 0) {
 679                 if (streq("-a", *args) || streq("--add", *args)) {
 680                         num--, args++;
 681                         if (num < 2)
 682                                 return MSG_SYNTAX;
 683                         rule_t *rule = make_rule();
 684                         snprintf(rule->cause, sizeof(rule->cause), "%s", *args);
 685                         num--, args++;
 686                         size_t i = 0;
 687                         while (num > 0) {
 688                                 if (streq("-o", *args) || streq("--one-shot", *args)) {
 689                                         rule->one_shot = true;
 690                                 } else {
 691                                         for (size_t j = 0; i < sizeof(rule->effect) && j < strlen(*args); i++, j++)
 692                                                 rule->effect[i] = (*args)[j];
 693                                         if (num > 1 && i < sizeof(rule->effect))
 694                                                 rule->effect[i++] = ' ';
 695                                 }
 696                                 num--, args++;
 697                         }
 698                         rule->effect[MIN(i, sizeof(rule->effect) - 1)] = '\0';
 699                         add_rule(rule);
 700                 } else if (streq("-r", *args) || streq("--remove", *args)) {
 701                         num--, args++;
 702                         if (num < 1)
 703                                 return MSG_SYNTAX;
 704                         int idx;
 705                         while (num > 0) {
 706                                 if (parse_index(*args, &idx))
 707                                         remove_rule_by_index(idx - 1);
 708                                 else if (streq("tail", *args))
 709                                         remove_rule(rule_tail);
 710                                 else if (streq("head", *args))
 711                                         remove_rule(rule_head);
 712                                 else
 713                                         remove_rule_by_cause(*args);
 714                                 num--, args++;
 715                         }
 716                 } else if (streq("-l", *args) || streq("--list", *args)) {
 717                         num--, args++;
 718                         list_rules(num > 0 ? *args : NULL, rsp);
 719                 } else {
 720                         return MSG_SYNTAX;
 721                 }
 722                 num--, args++;
 723         }
 724
 725         return MSG_SUCCESS;
 726 }
 727
 728 int cmd_pointer(char **args, int num)
 729 {
 730         if (num < 1)
 731                 return MSG_SYNTAX;
 732         while (num > 0) {
 733                 if (streq("-t", *args) || streq("--track", *args)) {
 734                         num--, args++;
 735                         if (num < 2)
 736                                 return MSG_SYNTAX;
 737                         int x, y;
 738                         if (sscanf(*args, "%i", &x) == 1 && sscanf(*(args + 1), "%i", &y) == 1)
 739                                 track_pointer(x, y);
 740                         else
 741                                 return MSG_FAILURE;
 742                         num--, args++;
 743                 } else if (streq("-g", *args) || streq("--grab", *args)) {
 744                         num--, args++;
 745                         if (num < 1)
 746                                 return MSG_SYNTAX;
 747                         pointer_action_t pac;
 748                         if (parse_pointer_action(*args, &pac))
 749                                 grab_pointer(pac);
 750                         else
 751                                 return MSG_FAILURE;
 752                 } else if (streq("-u", *args) || streq("--ungrab", *args)) {
 753                         ungrab_pointer();
 754                 } else {
 755                         return MSG_SYNTAX;
 756                 }
 757                 num--, args++;
 758         }
 759
 760         return MSG_SUCCESS;
 761 }
 762
 763 int cmd_restore(char **args, int num)
 764 {
 765         if (num < 1)
 766                 return MSG_SYNTAX;
 767         while (num > 0) {
 768                 if (streq("-T", *args) || streq("--tree", *args)) {
 769                         num--, args++;
 770                         if (num < 1)
 771                                 return MSG_SYNTAX;
 772                         restore_tree(*args);
 773                 } else if (streq("-H", *args) || streq("--history", *args)) {
 774                         num--, args++;
 775                         if (num < 1)
 776                                 return MSG_SYNTAX;
 777                         restore_history(*args);
 778                 } else if (streq("-S", *args) || streq("--stack", *args)) {
 779                         num--, args++;
 780                         if (num < 1)
 781                                 return MSG_SYNTAX;
 782                         restore_stack(*args);
 783                 } else {
 784                         return MSG_SYNTAX;
 785                 }
 786                 num--, args++;
 787         }
 788
 789         return MSG_SUCCESS;
 790 }
 791
 792 int cmd_control(char **args, int num, FILE *rsp)
 793 {
 794         if (num < 1)
 795                 return MSG_SYNTAX;
 796         while (num > 0) {
 797                 if (streq("--adopt-orphans", *args)) {
 798                         adopt_orphans();
 799                 } else if (streq("--toggle-visibility", *args)) {
 800                         toggle_visibility();
 801                 } else if (streq("--subscribe", *args)) {
 802                         return MSG_SUBSCRIBE;
 803                 } else if (streq("--get-status", *args)) {
 804                         print_status(rsp);
 805                 } else if (streq("--record-history", *args)) {
 806                         num--, args++;
 807                         if (num < 1)
 808                                 return MSG_SYNTAX;
 809                         bool b;
 810                         if (parse_bool(*args, &b))
 811                                 record_history = b;
 812                         else
 813                                 return MSG_SYNTAX;
 814                 } else {
 815                         return MSG_SYNTAX;
 816                 }
 817                 num--, args++;
 818         }
 819
 820         return MSG_SUCCESS;
 821 }
 822
 823 int cmd_config(char **args, int num, FILE *rsp)
 824 {
 825         if (num < 1)
 826                 return MSG_SYNTAX;
 827         coordinates_t ref = {mon, mon->desk, mon->desk->focus};
 828         coordinates_t trg = {NULL, NULL, NULL};
 829         if ((*args)[0] == OPT_CHR) {
 830                 if (streq("-m", *args) || streq("--monitor", *args)) {
 831                         num--, args++;
 832                         if (num < 1)
 833                                 return MSG_SYNTAX;
 834                         if (!monitor_from_desc(*args, &ref, &trg))
 835                                 return MSG_FAILURE;
 836                 } else if (streq("-d", *args) || streq("--desktop", *args)) {
 837                         num--, args++;
 838                         if (num < 1)
 839                                 return MSG_SYNTAX;
 840                         if (!desktop_from_desc(*args, &ref, &trg))
 841                                 return MSG_FAILURE;
 842                 } else if (streq("-w", *args) || streq("--window", *args)) {
 843                         num--, args++;
 844                         if (num < 1)
 845                                 return MSG_SYNTAX;
 846                         if (!node_from_desc(*args, &ref, &trg))
 847                                 return MSG_FAILURE;
 848                 } else {
 849                         return MSG_SYNTAX;
 850                 }
 851                 num--, args++;
 852         }
 853         if (num == 2)
 854                 return set_setting(trg, *args, *(args + 1));
 855         else if (num == 1)
 856                 return get_setting(trg, *args, rsp);
 857         else
 858                 return MSG_SYNTAX;
 859 }
 860
 861 int cmd_quit(char **args, int num)
 862 {
 863         if (num > 0 && sscanf(*args, "%i", &exit_status) != 1)
 864                 return MSG_FAILURE;
 865         running = false;
 866         return MSG_SUCCESS;
 867 }
 868
 869 int set_setting(coordinates_t loc, char *name, char *value)
 870 {
 871 #define DESKWINSET(k, v) \
 872                 if (loc.node != NULL) \
 873                         loc.node->client->k = v; \
 874                 else if (loc.desktop != NULL) \
 875                         loc.desktop->k = v; \
 876                 else if (loc.monitor != NULL) \
 877                         for (desktop_t *d = loc.monitor->desk_head; d != NULL; d = d->next) \
 878                                 d->k = v; \
 879                 else \
 880                         for (monitor_t *m = mon_head; m != NULL; m = m->next) \
 881                                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) \
 882                                         d->k = v;
 883         if (streq("border_width", name)) {
 884                 unsigned int bw;
 885                 if (sscanf(value, "%u", &bw) != 1)
 886                         return MSG_FAILURE;
 887                 DESKWINSET(border_width, bw)
 888 #undef DESKWINSET
 889 #define DESKSET(k, v) \
 890                 if (loc.desktop != NULL) \
 891                         loc.desktop->k = v; \
 892                 else if (loc.monitor != NULL) \
 893                         for (desktop_t *d = loc.monitor->desk_head; d != NULL; d = d->next) \
 894                                 d->k = v; \
 895                 else \
 896                         for (monitor_t *m = mon_head; m != NULL; m = m->next) \
 897                                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) \
 898                                         d->k = v;
 899         } else if (streq("window_gap", name)) {
 900                 int wg;
 901                 if (sscanf(value, "%i", &wg) != 1)
 902                         return MSG_FAILURE;
 903                 DESKSET(window_gap, wg)
 904 #undef DESKSET
 905 #define MONDESKSET(k, v) \
 906                 if (loc.desktop != NULL) \
 907                         loc.desktop->k = v; \
 908                 else if (loc.monitor != NULL) \
 909                         loc.monitor->k = v; \
 910                 else \
 911                         for (monitor_t *m = mon_head; m != NULL; m = m->next) \
 912                                 m->k = v;
 913         } else if (streq("top_padding", name)) {
 914                 int tp;
 915                 if (sscanf(value, "%i", &tp) != 1)
 916                         return MSG_FAILURE;
 917                 MONDESKSET(top_padding, tp)
 918         } else if (streq("right_padding", name)) {
 919                 int rp;
 920                 if (sscanf(value, "%i", &rp) != 1)
 921                         return MSG_FAILURE;
 922                 MONDESKSET(right_padding, rp)
 923         } else if (streq("bottom_padding", name)) {
 924                 int bp;
 925                 if (sscanf(value, "%i", &bp) != 1)
 926                         return MSG_FAILURE;
 927                 MONDESKSET(bottom_padding, bp)
 928         } else if (streq("left_padding", name)) {
 929                 int lp;
 930                 if (sscanf(value, "%i", &lp) != 1)
 931                         return MSG_FAILURE;
 932                 MONDESKSET(left_padding, lp)
 933 #undef MONDESKSET
 934 #define SETSTR(s) \
 935         } else if (streq(#s, name)) { \
 936                 return snprintf(s, sizeof(s), "%s", value) >= 0;
 937         SETSTR(external_rules_command)
 938         SETSTR(status_prefix)
 939 #undef SETSTR
 940         } else if (streq("split_ratio", name)) {
 941                 double r;
 942                 if (sscanf(value, "%lf", &r) == 1 && r > 0 && r < 1)
 943                         split_ratio = r;
 944                 else
 945                         return MSG_FAILURE;
 946                 return MSG_SUCCESS;
 947 #define SETCOLOR(s) \
 948         } else if (streq(#s, name)) { \
 949                 snprintf(s, sizeof(s), "%s", value);
 950         SETCOLOR(focused_border_color)
 951         SETCOLOR(active_border_color)
 952         SETCOLOR(normal_border_color)
 953         SETCOLOR(presel_border_color)
 954         SETCOLOR(focused_locked_border_color)
 955         SETCOLOR(active_locked_border_color)
 956         SETCOLOR(normal_locked_border_color)
 957         SETCOLOR(focused_sticky_border_color)
 958         SETCOLOR(active_sticky_border_color)
 959         SETCOLOR(normal_sticky_border_color)
 960         SETCOLOR(focused_private_border_color)
 961         SETCOLOR(active_private_border_color)
 962         SETCOLOR(normal_private_border_color)
 963         SETCOLOR(urgent_border_color)
 964 #undef SETCOLOR
 965         } else if (streq("focus_follows_pointer", name)) {
 966                 bool b;
 967                 if (parse_bool(value, &b) && b != focus_follows_pointer) {
 968                         focus_follows_pointer = b;
 969                         for (monitor_t *m = mon_head; m != NULL; m = m->next)
 970                                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next)
 971                                         for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
 972                                                 uint32_t values[] = {CLIENT_EVENT_MASK | (focus_follows_pointer ? XCB_EVENT_MASK_ENTER_WINDOW : 0)};
 973                                                 xcb_change_window_attributes(dpy, n->client->window, XCB_CW_EVENT_MASK, values);
 974                                         }
 975                         if (focus_follows_pointer) {
 976                                 for (monitor_t *m = mon_head; m != NULL; m = m->next)
 977                                         window_show(m->root);
 978                                 enable_motion_recorder();
 979                         } else {
 980                                 for (monitor_t *m = mon_head; m != NULL; m = m->next)
 981                                         window_hide(m->root);
 982                                 disable_motion_recorder();
 983                         }
 984                         return MSG_SUCCESS;
 985                 } else {
 986                         return MSG_FAILURE;
 987                 }
 988 #define SETBOOL(s) \
 989         } else if (streq(#s, name)) { \
 990                 if (!parse_bool(value, &s)) \
 991                         return MSG_FAILURE;
 992                 SETBOOL(borderless_monocle)
 993                 SETBOOL(gapless_monocle)
 994                 SETBOOL(pointer_follows_monitor)
 995                 SETBOOL(apply_floating_atom)
 996                 SETBOOL(auto_alternate)
 997                 SETBOOL(auto_cancel)
 998                 SETBOOL(history_aware_focus)
 999                 SETBOOL(ignore_ewmh_focus)
1000                 SETBOOL(remove_disabled_monitor)
1001                 SETBOOL(persistent_monitors)
1002 #undef SETBOOL
1003         } else {
1004                 return MSG_FAILURE;
1005         }
1006
1007         for (monitor_t *m = mon_head; m != NULL; m = m->next)
1008                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next)
1009                         arrange(m, d);
1010
1011         return MSG_SUCCESS;
1012 }
1013
1014 int get_setting(coordinates_t loc, char *name, FILE* rsp)
1015 {
1016         if (streq("split_ratio", name))
1017                 fprintf(rsp, "%lf", split_ratio);
1018         else if (streq("window_gap", name))
1019                 if (loc.desktop == NULL)
1020                         return MSG_FAILURE;
1021                 else
1022                         fprintf(rsp, "%i", loc.desktop->window_gap);
1023         else if (streq("border_width", name))
1024                 if (loc.node != NULL)
1025                         fprintf(rsp, "%u", loc.node->client->border_width);
1026                 else if (loc.desktop != NULL)
1027                         fprintf(rsp, "%u", loc.desktop->border_width);
1028                 else
1029                         return MSG_FAILURE;
1030         else if (streq("external_rules_command", name))
1031                 fprintf(rsp, "%s", external_rules_command);
1032         else if (streq("status_prefix", name))
1033                 fprintf(rsp, "%s", status_prefix);
1034 #define MONDESKGET(k) \
1035         else if (streq(#k, name)) \
1036                 if (loc.desktop != NULL) \
1037                         fprintf(rsp, "%i", loc.desktop->k); \
1038                 else if (loc.monitor != NULL) \
1039                         fprintf(rsp, "%i", loc.monitor->k); \
1040                 else \
1041                         return MSG_FAILURE;
1042         MONDESKGET(top_padding)
1043         MONDESKGET(right_padding)
1044         MONDESKGET(bottom_padding)
1045         MONDESKGET(left_padding)
1046 #undef DESKGET
1047 #define GETCOLOR(s) \
1048         else if (streq(#s, name)) \
1049                 fprintf(rsp, "%s", s);
1050         GETCOLOR(focused_border_color)
1051         GETCOLOR(active_border_color)
1052         GETCOLOR(normal_border_color)
1053         GETCOLOR(presel_border_color)
1054         GETCOLOR(focused_locked_border_color)
1055         GETCOLOR(active_locked_border_color)
1056         GETCOLOR(normal_locked_border_color)
1057         GETCOLOR(focused_sticky_border_color)
1058         GETCOLOR(active_sticky_border_color)
1059         GETCOLOR(normal_sticky_border_color)
1060         GETCOLOR(urgent_border_color)
1061 #undef GETCOLOR
1062 #define GETBOOL(s) \
1063         else if (streq(#s, name)) \
1064                 fprintf(rsp, "%s", BOOLSTR(s));
1065         GETBOOL(borderless_monocle)
1066         GETBOOL(gapless_monocle)
1067         GETBOOL(focus_follows_pointer)
1068         GETBOOL(pointer_follows_monitor)
1069         GETBOOL(apply_floating_atom)
1070         GETBOOL(auto_alternate)
1071         GETBOOL(auto_cancel)
1072         GETBOOL(history_aware_focus)
1073         GETBOOL(ignore_ewmh_focus)
1074         GETBOOL(remove_disabled_monitor)
1075         GETBOOL(persistent_monitors)
1076 #undef GETBOOL
1077         else
1078                 return MSG_FAILURE;
1079         return MSG_SUCCESS;
1080 }
1081
1082 bool parse_bool(char *value, bool *b)
1083 {
1084         if (streq("true", value) || streq("on", value)) {
1085                 *b = true;
1086                 return true;
1087         } else if (streq("false", value) || streq("off", value)) {
1088                 *b = false;
1089                 return true;
1090         }
1091         return false;
1092 }
1093
1094 bool parse_layout(char *s, layout_t *l)
1095 {
1096         if (streq("monocle", s)) {
1097                 *l = LAYOUT_MONOCLE;
1098                 return true;
1099         } else if (streq("tiled", s)) {
1100                 *l = LAYOUT_TILED;
1101                 return true;
1102         }
1103         return false;
1104 }
1105
1106 bool parse_direction(char *s, direction_t *d)
1107 {
1108         if (streq("right", s)) {
1109                 *d = DIR_RIGHT;
1110                 return true;
1111         } else if (streq("down", s)) {
1112                 *d = DIR_DOWN;
1113                 return true;
1114         } else if (streq("left", s)) {
1115                 *d = DIR_LEFT;
1116                 return true;
1117         } else if (streq("up", s)) {
1118                 *d = DIR_UP;
1119                 return true;
1120         }
1121         return false;
1122 }
1123
1124 bool parse_cycle_direction(char *s, cycle_dir_t *d)
1125 {
1126         if (streq("next", s)) {
1127                 *d = CYCLE_NEXT;
1128                 return true;
1129         } else if (streq("prev", s)) {
1130                 *d = CYCLE_PREV;
1131                 return true;
1132         }
1133         return false;
1134 }
1135
1136 bool parse_circulate_direction(char *s, circulate_dir_t *d)
1137 {
1138         if (streq("forward", s)) {
1139                 *d = CIRCULATE_FORWARD;
1140                 return true;
1141         } else if (streq("backward", s)) {
1142                 *d = CIRCULATE_BACKWARD;
1143                 return true;
1144         }
1145         return false;
1146 }
1147
1148 bool parse_history_direction(char *s, history_dir_t *d)
1149 {
1150         if (streq("older", s)) {
1151                 *d = HISTORY_OLDER;
1152                 return true;
1153         } else if (streq("newer", s)) {
1154                 *d = HISTORY_NEWER;
1155                 return true;
1156         }
1157         return false;
1158 }
1159
1160
1161 bool parse_flip(char *s, flip_t *f)
1162 {
1163         if (streq("horizontal", s)) {
1164                 *f = FLIP_HORIZONTAL;
1165                 return true;
1166         } else if (streq("vertical", s)) {
1167                 *f = FLIP_VERTICAL;
1168                 return true;
1169         }
1170         return false;
1171 }
1172
1173 bool parse_pointer_action(char *s, pointer_action_t *a)
1174 {
1175         if (streq("move", s)) {
1176                 *a = ACTION_MOVE;
1177                 return true;
1178         } else if (streq("resize_corner", s)) {
1179                 *a = ACTION_RESIZE_CORNER;
1180                 return true;
1181         } else if (streq("resize_side", s)) {
1182                 *a = ACTION_RESIZE_SIDE;
1183                 return true;
1184         } else if (streq("focus", s)) {
1185                 *a = ACTION_FOCUS;
1186                 return true;
1187         }
1188         return false;
1189 }
1190
1191 bool parse_degree(char *s, int *d)
1192 {
1193         int i = atoi(s);
1194         while (i < 0)
1195                 i += 360;
1196         while (i > 359)
1197                 i -= 360;
1198         if ((i % 90) != 0) {
1199                 return false;
1200         } else {
1201                 *d = i;
1202                 return true;
1203         }
1204 }
1205
1206 bool parse_window_id(char *s, long int *i)
1207 {
1208         char *end;
1209         errno = 0;
1210         long int ret = strtol(s, &end, 0);
1211         if (errno != 0 || *end != '\0')
1212                 return false;
1213         else
1214                 *i = ret;
1215         return true;
1216 }
1217
1218 bool parse_bool_declaration(char *s, char **key, bool *value, alter_state_t *state)
1219 {
1220         *key = strtok(s, EQL_TOK);
1221         char *v = strtok(NULL, EQL_TOK);
1222         if (v == NULL) {
1223                 *state = ALTER_TOGGLE;
1224                 return true;
1225         } else {
1226                 if (parse_bool(v, value)) {
1227                         *state = ALTER_SET;
1228                         return true;
1229                 } else {
1230                         return false;
1231                 }
1232         }
1233         return false;
1234 }
1235
1236 bool parse_index(char *s, int *i)
1237 {
1238         int idx;
1239         if (sscanf(s, "^%i", &idx) != 1 || idx < 1)
1240                 return false;
1241         *i = idx;
1242         return true;
1243 }