1 /* $OpenBSD: cmd.c,v 1.122 2016/03/01 12:06:07 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 #include <sys/time.h> 21 22 #include <fnmatch.h> 23 #include <paths.h> 24 #include <pwd.h> 25 #include <stdlib.h> 26 #include <string.h> 27 #include <unistd.h> 28 29 #include "tmux.h" 30 31 extern const struct cmd_entry cmd_attach_session_entry; 32 extern const struct cmd_entry cmd_bind_key_entry; 33 extern const struct cmd_entry cmd_break_pane_entry; 34 extern const struct cmd_entry cmd_capture_pane_entry; 35 extern const struct cmd_entry cmd_choose_buffer_entry; 36 extern const struct cmd_entry cmd_choose_client_entry; 37 extern const struct cmd_entry cmd_choose_session_entry; 38 extern const struct cmd_entry cmd_choose_tree_entry; 39 extern const struct cmd_entry cmd_choose_window_entry; 40 extern const struct cmd_entry cmd_clear_history_entry; 41 extern const struct cmd_entry cmd_clock_mode_entry; 42 extern const struct cmd_entry cmd_command_prompt_entry; 43 extern const struct cmd_entry cmd_confirm_before_entry; 44 extern const struct cmd_entry cmd_copy_mode_entry; 45 extern const struct cmd_entry cmd_delete_buffer_entry; 46 extern const struct cmd_entry cmd_detach_client_entry; 47 extern const struct cmd_entry cmd_display_message_entry; 48 extern const struct cmd_entry cmd_display_panes_entry; 49 extern const struct cmd_entry cmd_down_pane_entry; 50 extern const struct cmd_entry cmd_find_window_entry; 51 extern const struct cmd_entry cmd_has_session_entry; 52 extern const struct cmd_entry cmd_if_shell_entry; 53 extern const struct cmd_entry cmd_join_pane_entry; 54 extern const struct cmd_entry cmd_kill_pane_entry; 55 extern const struct cmd_entry cmd_kill_server_entry; 56 extern const struct cmd_entry cmd_kill_session_entry; 57 extern const struct cmd_entry cmd_kill_window_entry; 58 extern const struct cmd_entry cmd_last_pane_entry; 59 extern const struct cmd_entry cmd_last_window_entry; 60 extern const struct cmd_entry cmd_link_window_entry; 61 extern const struct cmd_entry cmd_list_buffers_entry; 62 extern const struct cmd_entry cmd_list_clients_entry; 63 extern const struct cmd_entry cmd_list_commands_entry; 64 extern const struct cmd_entry cmd_list_keys_entry; 65 extern const struct cmd_entry cmd_list_panes_entry; 66 extern const struct cmd_entry cmd_list_sessions_entry; 67 extern const struct cmd_entry cmd_list_windows_entry; 68 extern const struct cmd_entry cmd_load_buffer_entry; 69 extern const struct cmd_entry cmd_lock_client_entry; 70 extern const struct cmd_entry cmd_lock_server_entry; 71 extern const struct cmd_entry cmd_lock_session_entry; 72 extern const struct cmd_entry cmd_move_pane_entry; 73 extern const struct cmd_entry cmd_move_window_entry; 74 extern const struct cmd_entry cmd_new_session_entry; 75 extern const struct cmd_entry cmd_new_window_entry; 76 extern const struct cmd_entry cmd_next_layout_entry; 77 extern const struct cmd_entry cmd_next_window_entry; 78 extern const struct cmd_entry cmd_paste_buffer_entry; 79 extern const struct cmd_entry cmd_pipe_pane_entry; 80 extern const struct cmd_entry cmd_previous_layout_entry; 81 extern const struct cmd_entry cmd_previous_window_entry; 82 extern const struct cmd_entry cmd_refresh_client_entry; 83 extern const struct cmd_entry cmd_rename_session_entry; 84 extern const struct cmd_entry cmd_rename_window_entry; 85 extern const struct cmd_entry cmd_resize_pane_entry; 86 extern const struct cmd_entry cmd_respawn_pane_entry; 87 extern const struct cmd_entry cmd_respawn_window_entry; 88 extern const struct cmd_entry cmd_rotate_window_entry; 89 extern const struct cmd_entry cmd_run_shell_entry; 90 extern const struct cmd_entry cmd_save_buffer_entry; 91 extern const struct cmd_entry cmd_select_layout_entry; 92 extern const struct cmd_entry cmd_select_pane_entry; 93 extern const struct cmd_entry cmd_select_window_entry; 94 extern const struct cmd_entry cmd_send_keys_entry; 95 extern const struct cmd_entry cmd_send_prefix_entry; 96 extern const struct cmd_entry cmd_server_info_entry; 97 extern const struct cmd_entry cmd_set_buffer_entry; 98 extern const struct cmd_entry cmd_set_environment_entry; 99 extern const struct cmd_entry cmd_set_hook_entry; 100 extern const struct cmd_entry cmd_set_option_entry; 101 extern const struct cmd_entry cmd_set_window_option_entry; 102 extern const struct cmd_entry cmd_show_buffer_entry; 103 extern const struct cmd_entry cmd_show_environment_entry; 104 extern const struct cmd_entry cmd_show_hooks_entry; 105 extern const struct cmd_entry cmd_show_messages_entry; 106 extern const struct cmd_entry cmd_show_options_entry; 107 extern const struct cmd_entry cmd_show_window_options_entry; 108 extern const struct cmd_entry cmd_source_file_entry; 109 extern const struct cmd_entry cmd_split_window_entry; 110 extern const struct cmd_entry cmd_start_server_entry; 111 extern const struct cmd_entry cmd_suspend_client_entry; 112 extern const struct cmd_entry cmd_swap_pane_entry; 113 extern const struct cmd_entry cmd_swap_window_entry; 114 extern const struct cmd_entry cmd_switch_client_entry; 115 extern const struct cmd_entry cmd_unbind_key_entry; 116 extern const struct cmd_entry cmd_unlink_window_entry; 117 extern const struct cmd_entry cmd_up_pane_entry; 118 extern const struct cmd_entry cmd_wait_for_entry; 119 120 const struct cmd_entry *cmd_table[] = { 121 &cmd_attach_session_entry, 122 &cmd_bind_key_entry, 123 &cmd_break_pane_entry, 124 &cmd_capture_pane_entry, 125 &cmd_choose_buffer_entry, 126 &cmd_choose_client_entry, 127 &cmd_choose_session_entry, 128 &cmd_choose_tree_entry, 129 &cmd_choose_window_entry, 130 &cmd_clear_history_entry, 131 &cmd_clock_mode_entry, 132 &cmd_command_prompt_entry, 133 &cmd_confirm_before_entry, 134 &cmd_copy_mode_entry, 135 &cmd_delete_buffer_entry, 136 &cmd_detach_client_entry, 137 &cmd_display_message_entry, 138 &cmd_display_panes_entry, 139 &cmd_find_window_entry, 140 &cmd_has_session_entry, 141 &cmd_if_shell_entry, 142 &cmd_join_pane_entry, 143 &cmd_kill_pane_entry, 144 &cmd_kill_server_entry, 145 &cmd_kill_session_entry, 146 &cmd_kill_window_entry, 147 &cmd_last_pane_entry, 148 &cmd_last_window_entry, 149 &cmd_link_window_entry, 150 &cmd_list_buffers_entry, 151 &cmd_list_clients_entry, 152 &cmd_list_commands_entry, 153 &cmd_list_keys_entry, 154 &cmd_list_panes_entry, 155 &cmd_list_sessions_entry, 156 &cmd_list_windows_entry, 157 &cmd_load_buffer_entry, 158 &cmd_lock_client_entry, 159 &cmd_lock_server_entry, 160 &cmd_lock_session_entry, 161 &cmd_move_pane_entry, 162 &cmd_move_window_entry, 163 &cmd_new_session_entry, 164 &cmd_new_window_entry, 165 &cmd_next_layout_entry, 166 &cmd_next_window_entry, 167 &cmd_paste_buffer_entry, 168 &cmd_pipe_pane_entry, 169 &cmd_previous_layout_entry, 170 &cmd_previous_window_entry, 171 &cmd_refresh_client_entry, 172 &cmd_rename_session_entry, 173 &cmd_rename_window_entry, 174 &cmd_resize_pane_entry, 175 &cmd_respawn_pane_entry, 176 &cmd_respawn_window_entry, 177 &cmd_rotate_window_entry, 178 &cmd_run_shell_entry, 179 &cmd_save_buffer_entry, 180 &cmd_select_layout_entry, 181 &cmd_select_pane_entry, 182 &cmd_select_window_entry, 183 &cmd_send_keys_entry, 184 &cmd_send_prefix_entry, 185 &cmd_server_info_entry, 186 &cmd_set_buffer_entry, 187 &cmd_set_environment_entry, 188 &cmd_set_hook_entry, 189 &cmd_set_option_entry, 190 &cmd_set_window_option_entry, 191 &cmd_show_buffer_entry, 192 &cmd_show_environment_entry, 193 &cmd_show_hooks_entry, 194 &cmd_show_messages_entry, 195 &cmd_show_options_entry, 196 &cmd_show_window_options_entry, 197 &cmd_source_file_entry, 198 &cmd_split_window_entry, 199 &cmd_start_server_entry, 200 &cmd_suspend_client_entry, 201 &cmd_swap_pane_entry, 202 &cmd_swap_window_entry, 203 &cmd_switch_client_entry, 204 &cmd_unbind_key_entry, 205 &cmd_unlink_window_entry, 206 &cmd_wait_for_entry, 207 NULL 208 }; 209 210 int 211 cmd_pack_argv(int argc, char **argv, char *buf, size_t len) 212 { 213 size_t arglen; 214 int i; 215 216 if (argc == 0) 217 return (0); 218 219 *buf = '\0'; 220 for (i = 0; i < argc; i++) { 221 if (strlcpy(buf, argv[i], len) >= len) 222 return (-1); 223 arglen = strlen(argv[i]) + 1; 224 buf += arglen; 225 len -= arglen; 226 } 227 228 return (0); 229 } 230 231 int 232 cmd_unpack_argv(char *buf, size_t len, int argc, char ***argv) 233 { 234 int i; 235 size_t arglen; 236 237 if (argc == 0) 238 return (0); 239 *argv = xcalloc(argc, sizeof **argv); 240 241 buf[len - 1] = '\0'; 242 for (i = 0; i < argc; i++) { 243 if (len == 0) { 244 cmd_free_argv(argc, *argv); 245 return (-1); 246 } 247 248 arglen = strlen(buf) + 1; 249 (*argv)[i] = xstrdup(buf); 250 buf += arglen; 251 len -= arglen; 252 } 253 254 return (0); 255 } 256 257 char ** 258 cmd_copy_argv(int argc, char **argv) 259 { 260 char **new_argv; 261 int i; 262 263 if (argc == 0) 264 return (NULL); 265 new_argv = xcalloc(argc + 1, sizeof *new_argv); 266 for (i = 0; i < argc; i++) { 267 if (argv[i] != NULL) 268 new_argv[i] = xstrdup(argv[i]); 269 } 270 return (new_argv); 271 } 272 273 void 274 cmd_free_argv(int argc, char **argv) 275 { 276 int i; 277 278 if (argc == 0) 279 return; 280 for (i = 0; i < argc; i++) 281 free(argv[i]); 282 free(argv); 283 } 284 285 char * 286 cmd_stringify_argv(int argc, char **argv) 287 { 288 char *buf; 289 int i; 290 size_t len; 291 292 if (argc == 0) 293 return (xstrdup("")); 294 295 len = 0; 296 buf = NULL; 297 298 for (i = 0; i < argc; i++) { 299 len += strlen(argv[i]) + 1; 300 buf = xrealloc(buf, len); 301 302 if (i == 0) 303 *buf = '\0'; 304 else 305 strlcat(buf, " ", len); 306 strlcat(buf, argv[i], len); 307 } 308 return (buf); 309 } 310 311 struct cmd * 312 cmd_parse(int argc, char **argv, const char *file, u_int line, char **cause) 313 { 314 const struct cmd_entry **entryp, *entry; 315 struct cmd *cmd; 316 struct args *args; 317 char s[BUFSIZ]; 318 int ambiguous = 0; 319 320 *cause = NULL; 321 if (argc == 0) { 322 xasprintf(cause, "no command"); 323 return (NULL); 324 } 325 326 entry = NULL; 327 for (entryp = cmd_table; *entryp != NULL; entryp++) { 328 if ((*entryp)->alias != NULL && 329 strcmp((*entryp)->alias, argv[0]) == 0) { 330 ambiguous = 0; 331 entry = *entryp; 332 break; 333 } 334 335 if (strncmp((*entryp)->name, argv[0], strlen(argv[0])) != 0) 336 continue; 337 if (entry != NULL) 338 ambiguous = 1; 339 entry = *entryp; 340 341 /* Bail now if an exact match. */ 342 if (strcmp(entry->name, argv[0]) == 0) 343 break; 344 } 345 if (ambiguous) 346 goto ambiguous; 347 if (entry == NULL) { 348 xasprintf(cause, "unknown command: %s", argv[0]); 349 return (NULL); 350 } 351 352 args = args_parse(entry->args.template, argc, argv); 353 if (args == NULL) 354 goto usage; 355 if (entry->args.lower != -1 && args->argc < entry->args.lower) 356 goto usage; 357 if (entry->args.upper != -1 && args->argc > entry->args.upper) 358 goto usage; 359 360 cmd = xcalloc(1, sizeof *cmd); 361 cmd->entry = entry; 362 cmd->args = args; 363 364 if (file != NULL) 365 cmd->file = xstrdup(file); 366 cmd->line = line; 367 368 return (cmd); 369 370 ambiguous: 371 *s = '\0'; 372 for (entryp = cmd_table; *entryp != NULL; entryp++) { 373 if (strncmp((*entryp)->name, argv[0], strlen(argv[0])) != 0) 374 continue; 375 if (strlcat(s, (*entryp)->name, sizeof s) >= sizeof s) 376 break; 377 if (strlcat(s, ", ", sizeof s) >= sizeof s) 378 break; 379 } 380 s[strlen(s) - 2] = '\0'; 381 xasprintf(cause, "ambiguous command: %s, could be: %s", argv[0], s); 382 return (NULL); 383 384 usage: 385 if (args != NULL) 386 args_free(args); 387 xasprintf(cause, "usage: %s %s", entry->name, entry->usage); 388 return (NULL); 389 } 390 391 static int 392 cmd_prepare_state_flag(char c, const char *target, enum cmd_entry_flag flag, 393 struct cmd_q *cmdq, struct cmd_q *parent) 394 { 395 int targetflags, error; 396 struct cmd_find_state *fs = NULL; 397 struct cmd_find_state *current = NULL; 398 struct cmd_find_state tmp; 399 400 if (flag == CMD_NONE || 401 flag == CMD_CLIENT || 402 flag == CMD_CLIENT_CANFAIL) 403 return (0); 404 405 if (c == 't') 406 fs = &cmdq->state.tflag; 407 else if (c == 's') 408 fs = &cmdq->state.sflag; 409 410 if (flag == CMD_SESSION_WITHPANE) { 411 if (target != NULL && target[strcspn(target, ":.")] != '\0') 412 flag = CMD_PANE; 413 else 414 flag = CMD_SESSION; 415 } 416 417 targetflags = 0; 418 switch (flag) { 419 case CMD_SESSION: 420 case CMD_SESSION_CANFAIL: 421 case CMD_SESSION_PREFERUNATTACHED: 422 if (flag == CMD_SESSION_CANFAIL) 423 targetflags |= CMD_FIND_QUIET; 424 if (flag == CMD_SESSION_PREFERUNATTACHED) 425 targetflags |= CMD_FIND_PREFER_UNATTACHED; 426 break; 427 case CMD_MOVEW_R: 428 flag = CMD_WINDOW_INDEX; 429 /* FALLTHROUGH */ 430 case CMD_WINDOW: 431 case CMD_WINDOW_CANFAIL: 432 case CMD_WINDOW_MARKED: 433 case CMD_WINDOW_INDEX: 434 if (flag == CMD_WINDOW_CANFAIL) 435 targetflags |= CMD_FIND_QUIET; 436 if (flag == CMD_WINDOW_MARKED) 437 targetflags |= CMD_FIND_DEFAULT_MARKED; 438 if (flag == CMD_WINDOW_INDEX) 439 targetflags |= CMD_FIND_WINDOW_INDEX; 440 break; 441 case CMD_PANE: 442 case CMD_PANE_CANFAIL: 443 case CMD_PANE_MARKED: 444 if (flag == CMD_PANE_CANFAIL) 445 targetflags |= CMD_FIND_QUIET; 446 if (flag == CMD_PANE_MARKED) 447 targetflags |= CMD_FIND_DEFAULT_MARKED; 448 break; 449 default: 450 fatalx("unknown %cflag %d", c, flag); 451 } 452 453 log_debug("%s: flag %c %d %#x", __func__, c, flag, targetflags); 454 if (parent != NULL) { 455 if (c == 't') 456 current = &parent->state.tflag; 457 else if (c == 's') 458 current = &parent->state.sflag; 459 } else { 460 error = cmd_find_current(&tmp, cmdq, targetflags); 461 if (error != 0 && ~targetflags & CMD_FIND_QUIET) 462 return (-1); 463 current = &tmp; 464 } 465 466 switch (flag) { 467 case CMD_NONE: 468 case CMD_CLIENT: 469 case CMD_CLIENT_CANFAIL: 470 return (0); 471 case CMD_SESSION: 472 case CMD_SESSION_CANFAIL: 473 case CMD_SESSION_PREFERUNATTACHED: 474 case CMD_SESSION_WITHPANE: 475 error = cmd_find_target(fs, current, cmdq, target, 476 CMD_FIND_SESSION, targetflags); 477 if (error != 0 && ~targetflags & CMD_FIND_QUIET) 478 return (-1); 479 break; 480 case CMD_MOVEW_R: 481 error = cmd_find_target(fs, current, cmdq, target, 482 CMD_FIND_SESSION, CMD_FIND_QUIET); 483 if (error == 0) 484 break; 485 /* FALLTHROUGH */ 486 case CMD_WINDOW: 487 case CMD_WINDOW_CANFAIL: 488 case CMD_WINDOW_MARKED: 489 case CMD_WINDOW_INDEX: 490 error = cmd_find_target(fs, current, cmdq, target, 491 CMD_FIND_WINDOW, targetflags); 492 if (error != 0 && ~targetflags & CMD_FIND_QUIET) 493 return (-1); 494 break; 495 case CMD_PANE: 496 case CMD_PANE_CANFAIL: 497 case CMD_PANE_MARKED: 498 error = cmd_find_target(fs, current, cmdq, target, 499 CMD_FIND_PANE, targetflags); 500 if (error != 0 && ~targetflags & CMD_FIND_QUIET) 501 return (-1); 502 break; 503 default: 504 fatalx("unknown %cflag %d", c, flag); 505 } 506 return (0); 507 } 508 509 int 510 cmd_prepare_state(struct cmd *cmd, struct cmd_q *cmdq, struct cmd_q *parent) 511 { 512 const struct cmd_entry *entry = cmd->entry; 513 struct cmd_state *state = &cmdq->state; 514 char *tmp; 515 enum cmd_entry_flag flag; 516 const char *s; 517 int error; 518 519 tmp = cmd_print(cmd); 520 log_debug("preparing state for %s (client %p)", tmp, cmdq->client); 521 free(tmp); 522 523 state->c = NULL; 524 cmd_find_clear_state(&state->tflag, NULL, 0); 525 cmd_find_clear_state(&state->sflag, NULL, 0); 526 527 flag = cmd->entry->cflag; 528 if (flag == CMD_NONE) { 529 flag = cmd->entry->tflag; 530 if (flag == CMD_CLIENT || flag == CMD_CLIENT_CANFAIL) 531 s = args_get(cmd->args, 't'); 532 else 533 s = NULL; 534 } else 535 s = args_get(cmd->args, 'c'); 536 switch (flag) { 537 case CMD_CLIENT: 538 state->c = cmd_find_client(cmdq, s, 0); 539 if (state->c == NULL) 540 return (-1); 541 break; 542 default: 543 state->c = cmd_find_client(cmdq, s, 1); 544 break; 545 } 546 547 s = args_get(cmd->args, 't'); 548 log_debug("preparing -t state: target %s", s == NULL ? "none" : s); 549 550 error = cmd_prepare_state_flag('t', s, entry->tflag, cmdq, parent); 551 if (error != 0) 552 return (error); 553 554 s = args_get(cmd->args, 's'); 555 log_debug("preparing -s state: target %s", s == NULL ? "none" : s); 556 557 error = cmd_prepare_state_flag('s', s, entry->sflag, cmdq, parent); 558 if (error != 0) 559 return (error); 560 561 return (0); 562 } 563 564 char * 565 cmd_print(struct cmd *cmd) 566 { 567 char *out, *s; 568 569 s = args_print(cmd->args); 570 if (*s != '\0') 571 xasprintf(&out, "%s %s", cmd->entry->name, s); 572 else 573 out = xstrdup(cmd->entry->name); 574 free(s); 575 576 return (out); 577 } 578 579 /* Adjust current mouse position for a pane. */ 580 int 581 cmd_mouse_at(struct window_pane *wp, struct mouse_event *m, u_int *xp, 582 u_int *yp, int last) 583 { 584 u_int x, y; 585 586 if (last) { 587 x = m->lx; 588 y = m->ly; 589 } else { 590 x = m->x; 591 y = m->y; 592 } 593 594 if (m->statusat == 0 && y > 0) 595 y--; 596 else if (m->statusat > 0 && y >= (u_int)m->statusat) 597 y = m->statusat - 1; 598 599 if (x < wp->xoff || x >= wp->xoff + wp->sx) 600 return (-1); 601 if (y < wp->yoff || y >= wp->yoff + wp->sy) 602 return (-1); 603 604 *xp = x - wp->xoff; 605 *yp = y - wp->yoff; 606 return (0); 607 } 608 609 /* Get current mouse window if any. */ 610 struct winlink * 611 cmd_mouse_window(struct mouse_event *m, struct session **sp) 612 { 613 struct session *s; 614 struct window *w; 615 616 if (!m->valid || m->s == -1 || m->w == -1) 617 return (NULL); 618 if ((s = session_find_by_id(m->s)) == NULL) 619 return (NULL); 620 if ((w = window_find_by_id(m->w)) == NULL) 621 return (NULL); 622 623 if (sp != NULL) 624 *sp = s; 625 return (winlink_find_by_window(&s->windows, w)); 626 } 627 628 /* Get current mouse pane if any. */ 629 struct window_pane * 630 cmd_mouse_pane(struct mouse_event *m, struct session **sp, 631 struct winlink **wlp) 632 { 633 struct winlink *wl; 634 struct window_pane *wp; 635 636 if ((wl = cmd_mouse_window(m, sp)) == NULL) 637 return (NULL); 638 if ((wp = window_pane_find_by_id(m->wp)) == NULL) 639 return (NULL); 640 if (!window_has_pane(wl->window, wp)) 641 return (NULL); 642 643 if (wlp != NULL) 644 *wlp = wl; 645 return (wp); 646 } 647 648 /* Replace the first %% or %idx in template by s. */ 649 char * 650 cmd_template_replace(const char *template, const char *s, int idx) 651 { 652 char ch, *buf; 653 const char *ptr; 654 int replaced; 655 size_t len; 656 657 if (strchr(template, '%') == NULL) 658 return (xstrdup(template)); 659 660 buf = xmalloc(1); 661 *buf = '\0'; 662 len = 0; 663 replaced = 0; 664 665 ptr = template; 666 while (*ptr != '\0') { 667 switch (ch = *ptr++) { 668 case '%': 669 if (*ptr < '1' || *ptr > '9' || *ptr - '0' != idx) { 670 if (*ptr != '%' || replaced) 671 break; 672 replaced = 1; 673 } 674 ptr++; 675 676 len += strlen(s); 677 buf = xrealloc(buf, len + 1); 678 strlcat(buf, s, len + 1); 679 continue; 680 } 681 buf = xrealloc(buf, len + 2); 682 buf[len++] = ch; 683 buf[len] = '\0'; 684 } 685 686 return (buf); 687 } 688