1 /*- 2 * Copyright (c) 2002 Jonathan Belson <jon@witchspace.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/usr.sbin/kbdmap/kbdmap.c,v 1.2 2002/10/27 17:44:33 wollman Exp $ 27 * $DragonFly: src/usr.sbin/kbdmap/kbdmap.c,v 1.1 2004/06/21 01:37:42 cpressey Exp $ 28 */ 29 30 #include <sys/cdefs.h> 31 #include <sys/types.h> 32 #include <sys/queue.h> 33 34 #include <assert.h> 35 #include <ctype.h> 36 #include <dirent.h> 37 #include <limits.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <stringlist.h> 42 #include <unistd.h> 43 44 #include "kbdmap.h" 45 46 47 static const char *lang_default = DEFAULT_LANG; 48 static const char *font; 49 static const char *lang; 50 static const char *program; 51 static const char *keymapdir = DEFAULT_KEYMAP_DIR; 52 static const char *fontdir = DEFAULT_FONT_DIR; 53 static const char *sysconfig = DEFAULT_SYSCONFIG; 54 static const char *font_default = DEFAULT_FONT; 55 static const char *font_current; 56 static const char *dir; 57 static const char *menu = ""; 58 59 static int x11; 60 static int show; 61 static int verbose; 62 static int print; 63 64 65 struct keymap { 66 char *desc; 67 char *keym; 68 int mark; 69 SLIST_ENTRY(keymap) entries; 70 }; 71 static SLIST_HEAD(slisthead, keymap) head = SLIST_HEAD_INITIALIZER(head); 72 73 74 /* 75 * Get keymap entry for 'key', or NULL of not found 76 */ 77 static struct keymap * 78 get_keymap(const char *key) 79 { 80 struct keymap *km; 81 82 SLIST_FOREACH(km, &head, entries) 83 if (!strcmp(km->keym, key)) 84 return km; 85 86 return NULL; 87 } 88 89 /* 90 * Count the number of keymaps we found 91 */ 92 static int 93 get_num_keymaps(void) 94 { 95 struct keymap *km; 96 int count = 0; 97 98 SLIST_FOREACH(km, &head, entries) 99 count++; 100 101 return count; 102 } 103 104 /* 105 * Remove any keymap with given keym 106 */ 107 static void 108 remove_keymap(const char *keym) 109 { 110 struct keymap *km; 111 112 SLIST_FOREACH(km, &head, entries) { 113 if (!strcmp(keym, km->keym)) { 114 SLIST_REMOVE(&head, km, keymap, entries); 115 free(km); 116 break; 117 } 118 } 119 } 120 121 /* 122 * Add to hash with 'key' 123 */ 124 static void 125 add_keymap(const char *desc, int mark, const char *keym) 126 { 127 struct keymap *km, *km_new; 128 129 /* Is there already an entry with this key? */ 130 SLIST_FOREACH(km, &head, entries) { 131 if (!strcmp(km->keym, keym)) { 132 /* Reuse this entry */ 133 free(km->desc); 134 km->desc = strdup(desc); 135 km->mark = mark; 136 return; 137 } 138 } 139 140 km_new = (struct keymap *) malloc (sizeof(struct keymap)); 141 km_new->desc = strdup(desc); 142 km_new->keym = strdup(keym); 143 km_new->mark = mark; 144 145 /* Add to keymap list */ 146 SLIST_INSERT_HEAD(&head, km_new, entries); 147 } 148 149 /* 150 * Figure out the default language to use. 151 */ 152 static const char * 153 get_locale(void) 154 { 155 const char *locale; 156 157 if ((locale = getenv("LC_ALL")) == NULL && 158 (locale = getenv("LC_CTYPE")) == NULL && 159 (locale = getenv("LANG")) == NULL) 160 locale = lang_default; 161 162 /* Check for alias */ 163 if (!strcmp(locale, "C")) 164 locale = DEFAULT_LANG; 165 166 return locale; 167 } 168 169 /* 170 * Extract filename part 171 */ 172 static const char * 173 extract_name(const char *name) 174 { 175 char *p; 176 177 p = strrchr(name, '/'); 178 if (p != NULL && p[1] != '\0') 179 return p + 1; 180 181 return name; 182 } 183 184 /* 185 * Return file extension or NULL 186 */ 187 static char * 188 get_extension(const char *name) 189 { 190 char *p; 191 192 p = strrchr(name, '.'); 193 194 if (p != NULL && p[1] != '\0') 195 return p; 196 197 return NULL; 198 } 199 200 /* 201 * Read font from /etc/rc.conf else return default. 202 * Freeing the memory is the caller's responsibility. 203 */ 204 static char * 205 get_font(void) 206 { 207 char line[256], buf[20]; 208 char *fnt = NULL; 209 210 FILE *fp = fopen(sysconfig, "r"); 211 if (fp) { 212 while (fgets(line, sizeof(line), fp)) { 213 int a, b, matches; 214 215 if (line[0] == '#') 216 continue; 217 218 matches = sscanf(line, 219 " font%dx%d = \"%20[-.0-9a-zA-Z_]", 220 &a, &b, buf); 221 if (matches==3) { 222 if (strcmp(buf, "NO")) { 223 if (fnt) 224 free(fnt); 225 fnt = (char *) malloc(strlen(buf) + 1); 226 strcpy(fnt, buf); 227 } 228 } 229 } 230 } else 231 fprintf(stderr, "Could not open %s for reading\n", sysconfig); 232 233 return fnt; 234 } 235 236 /* 237 * Set a font using 'vidcontrol' 238 */ 239 static void 240 vidcontrol(const char *fnt) 241 { 242 char *tmp, *p, *q; 243 char ch; 244 int i; 245 246 /* syscons test failed */ 247 if (x11) 248 return; 249 250 tmp = strdup(fnt); 251 252 /* Extract font size */ 253 p = strrchr(tmp, '-'); 254 if (p && p[1] != '\0') { 255 p++; 256 /* Remove any '.fnt' extension */ 257 if ((q = strstr(p, ".fnt"))) 258 *q = '\0'; 259 260 /* 261 * Check font size is valid, with no trailing characters 262 * ('&ch' should not be matched) 263 */ 264 if (sscanf(p, "%dx%d%c", &i, &i, &ch) != 2) 265 fprintf(stderr, "Which font size? %s\n", fnt); 266 else { 267 char *cmd; 268 asprintf(&cmd, "vidcontrol -f %s %s", p, fnt); 269 if (verbose) 270 fprintf(stderr, "%s\n", cmd); 271 system(cmd); 272 free(cmd); 273 } 274 } else 275 fprintf(stderr, "Which font size? %s\n", fnt); 276 277 free(tmp); 278 } 279 280 /* 281 * Execute 'kbdcontrol' with the appropriate arguments 282 */ 283 static void 284 do_kbdcontrol(struct keymap *km) 285 { 286 char *kbd_cmd; 287 asprintf(&kbd_cmd, "kbdcontrol -l %s/%s", dir, km->keym); 288 289 if (!x11) 290 system(kbd_cmd); 291 292 printf("keymap=%s\n", km->keym); 293 free(kbd_cmd); 294 } 295 296 /* 297 * Call 'vidcontrol' with the appropriate arguments 298 */ 299 static void 300 do_vidfont(struct keymap *km) 301 { 302 char *vid_cmd, *tmp, *p, *q; 303 304 asprintf(&vid_cmd, "%s/%s", dir, km->keym); 305 vidcontrol(vid_cmd); 306 free(vid_cmd); 307 308 tmp = strdup(km->keym); 309 p = strrchr(tmp, '-'); 310 if (p && p[1]!='\0') { 311 p++; 312 q = get_extension(p); 313 if (q) { 314 *q = '\0'; 315 printf("font%s=%s\n", p, km->keym); 316 } 317 } 318 free(tmp); 319 } 320 321 /* 322 * Display dialog from 'keymaps[]' 323 */ 324 static void 325 show_dialog(struct keymap **km_sorted, int num_keymaps) 326 { 327 FILE *fp; 328 char *cmd, *dialog; 329 char tmp_name[] = "/tmp/_kbd_lang.XXXX"; 330 const char *ext; 331 int fd, i, size; 332 333 fd = mkstemp(tmp_name); 334 if (fd == -1) { 335 fprintf(stderr, "Could not open temporary file \"%s\"\n", 336 tmp_name); 337 exit(1); 338 } 339 asprintf(&dialog, "/usr/bin/dialog --clear --title \"Keyboard Menu\" " 340 "--menu \"%s\" -1 -1 10", menu); 341 342 ext = extract_name(dir); 343 344 /* start right font, assume that current font is equal 345 * to default font in /etc/rc.conf 346 * 347 * $font is the font which require the language $lang; e.g. 348 * russian *need* a koi8 font 349 * $font_current is the current font from /etc/rc.conf 350 */ 351 if (font && strcmp(font, font_current)) 352 vidcontrol(font); 353 354 /* Build up the command */ 355 size = 0; 356 for (i=0; i<num_keymaps; i++) { 357 /* 358 * Each 'font' is passed as ' "font" ""', so allow the 359 * extra space 360 */ 361 size += strlen(km_sorted[i]->desc) + 6; 362 } 363 364 /* Allow the space for '2> tmpfilename' redirection */ 365 size += strlen(tmp_name) + 3; 366 367 cmd = (char *) malloc(strlen(dialog) + size + 1); 368 strcpy(cmd, dialog); 369 370 for (i=0; i<num_keymaps; i++) { 371 strcat(cmd, " \""); 372 strcat(cmd, km_sorted[i]->desc); 373 strcat(cmd, "\""); 374 strcat(cmd, " \"\""); 375 } 376 377 strcat(cmd, " 2>"); 378 strcat(cmd, tmp_name); 379 380 /* Show the dialog.. */ 381 system(cmd); 382 383 fp = fopen(tmp_name, "r"); 384 if (fp) { 385 char choice[64]; 386 if (fgets(choice, 64, fp) != NULL) { 387 /* Find key for desc */ 388 for (i=0; i<num_keymaps; i++) { 389 if (!strcmp(choice, km_sorted[i]->desc)) { 390 if (!strcmp(program, "kbdmap")) 391 do_kbdcontrol(km_sorted[i]); 392 else 393 do_vidfont(km_sorted[i]); 394 break; 395 } 396 } 397 } else { 398 if (font != NULL && strcmp(font, font_current)) 399 /* Cancelled, restore old font */ 400 vidcontrol(font_current); 401 } 402 fclose(fp); 403 } else 404 fprintf(stderr, "Failed to open temporary file"); 405 406 /* Tidy up */ 407 remove(tmp_name); 408 free(cmd); 409 free(dialog); 410 close(fd); 411 } 412 413 /* 414 * Search for 'token' in comma delimited array 'buffer'. 415 * Return true for found, false for not found. 416 */ 417 static int 418 find_token(const char *buffer, const char *token) 419 { 420 char *buffer_tmp, *buffer_copy, *inputstring; 421 char **ap; 422 int found; 423 424 buffer_copy = strdup(buffer); 425 buffer_tmp = buffer_copy; 426 inputstring = buffer_copy; 427 ap = &buffer_tmp; 428 429 found = 0; 430 431 while ((*ap = strsep(&inputstring, ",")) != NULL) { 432 if (strcmp(buffer_tmp, token) == 0) { 433 found = 1; 434 break; 435 } 436 } 437 438 free(buffer_copy); 439 440 return found; 441 } 442 443 /* 444 * Compare function for qsort 445 */ 446 static int 447 compare_keymap(const void *a, const void *b) 448 { 449 450 /* We've been passed pointers to pointers, so: */ 451 const struct keymap *km1 = *((const struct keymap * const *) a); 452 const struct keymap *km2 = *((const struct keymap * const *) b); 453 454 return strcmp(km1->desc, km2->desc); 455 } 456 457 /* 458 * Compare function for qsort 459 */ 460 static int 461 compare_lang(const void *a, const void *b) 462 { 463 const char *l1 = *((const char * const *) a); 464 const char *l2 = *((const char * const *) b); 465 466 return strcmp(l1, l2); 467 } 468 469 /* 470 * Change '8x8' to '8x08' so qsort will put it before eg. '8x14' 471 */ 472 static void 473 kludge_desc(struct keymap **km_sorted, int num_keymaps) 474 { 475 int i; 476 477 for (i=0; i<num_keymaps; i++) { 478 char *p; 479 char *km = km_sorted[i]->desc; 480 if ((p = strstr(km, "8x8")) != NULL) { 481 int len; 482 int j; 483 int offset; 484 485 offset = p - km; 486 487 /* Make enough space for the extra '0' */ 488 len = strlen(km); 489 km = realloc(km, len + 2); 490 491 for (j=len; j!=offset+1; j--) 492 km[j + 1] = km[j]; 493 494 km[offset+2] = '0'; 495 496 km_sorted[i]->desc = km; 497 } 498 } 499 } 500 501 /* 502 * Reverse 'kludge_desc()' - change '8x08' back to '8x8' 503 */ 504 static void 505 unkludge_desc(struct keymap **km_sorted, int num_keymaps) 506 { 507 int i; 508 509 for (i=0; i<num_keymaps; i++) { 510 char *p; 511 char *km = km_sorted[i]->desc; 512 if ((p = strstr(km, "8x08")) != NULL) { 513 p += 2; 514 while (*p++) 515 p[-1] = p[0]; 516 517 km = realloc(km, p - km - 1); 518 km_sorted[i]->desc = km; 519 } 520 } 521 } 522 523 /* 524 * Return 0 if file exists and is readable, else -1 525 */ 526 static int 527 check_file(const char *keym) 528 { 529 int status = 0; 530 531 if (access(keym, R_OK) == -1) { 532 char *fn; 533 asprintf(&fn, "%s/%s", dir, keym); 534 if (access(fn, R_OK) == -1) { 535 if (verbose) 536 fprintf(stderr, "%s not found!\n", fn); 537 status = -1; 538 } 539 free(fn); 540 } else { 541 if (verbose) 542 fprintf(stderr, "No read permission for %s!\n", keym); 543 status = -1; 544 } 545 546 return status; 547 } 548 549 /* 550 * Read options from the relevent configuration file, then 551 * present to user. 552 */ 553 static void 554 menu_read(void) 555 { 556 const char *lg; 557 char *p; 558 int mark, num_keymaps, items, i; 559 char buffer[256], filename[PATH_MAX]; 560 char keym[64], lng[64], desc[64]; 561 char dialect[64], lang_abk[64]; 562 struct keymap *km; 563 struct keymap **km_sorted; 564 struct dirent *dp; 565 StringList *lang_list; 566 FILE *fp; 567 DIR *dirp; 568 569 lang_list = sl_init(); 570 571 sprintf(filename, "%s/INDEX.%s", dir, extract_name(dir)); 572 573 /* en_US.ISO8859-1 -> en_..\.ISO8859-1 */ 574 strlcpy(dialect, lang, sizeof(dialect)); 575 if (strlen(dialect) >= 6 && dialect[2] == '-') { 576 dialect[3] = '.'; 577 dialect[4] = '.'; 578 } 579 580 581 /* en_US.ISO8859-1 -> en */ 582 strlcpy(lang_abk, lang, sizeof(lang_abk)); 583 if (strlen(lang_abk) >= 3 && lang_abk[2] == '-') 584 lang_abk[2] = '.'; 585 586 fprintf(stderr, "lang_default = %s\n", lang_default); 587 fprintf(stderr, "dialect = %s\n", dialect); 588 fprintf(stderr, "lang_abk = %s\n", lang_abk); 589 590 fp = fopen(filename, "r"); 591 if (fp) { 592 int matches; 593 while (fgets(buffer, sizeof(buffer), fp)) { 594 p = buffer; 595 if (p[0] == '#') 596 continue; 597 598 while (isspace(*p)) 599 p++; 600 601 if (*p == '\0') 602 continue; 603 604 /* Parse input, removing newline */ 605 matches = sscanf(p, "%64[^:]:%64[^:]:%64[^:\n]", 606 keym, lng, desc); 607 if (matches == 3) { 608 if (strcmp(keym, "FONT") 609 && strcmp(keym, "MENU")) { 610 /* Check file exists & is readable */ 611 if (check_file(keym) == -1) 612 continue; 613 } 614 } 615 616 if (show) { 617 /* 618 * Take note of supported languages, which 619 * might be in a comma-delimited list 620 */ 621 char *tmp = strdup(lng); 622 char *delim = tmp; 623 624 for (delim = tmp; ; ) { 625 char ch = *delim++; 626 if (ch == ',' || ch == '\0') { 627 delim[-1] = '\0'; 628 if (!sl_find(lang_list, tmp)) 629 sl_add(lang_list, tmp); 630 if (ch == '\0') 631 break; 632 tmp = delim; 633 } 634 } 635 } 636 /* Set empty language to default language */ 637 if (lng[0] == '\0') 638 lg = lang_default; 639 else 640 lg = lng; 641 642 643 /* 4) Your choice if it exists 644 * 3) Long match eg. en_GB.ISO8859-1 is equal to 645 * en_..\.ISO8859-1 646 * 2) short match 'de' 647 * 1) default langlist 'en' 648 * 0) any language 649 * 650 * Language may be a comma separated list 651 * A higher match overwrites a lower 652 * A later entry overwrites a previous if it exists 653 * twice in the database 654 */ 655 656 /* Check for favoured language */ 657 km = get_keymap(keym); 658 mark = (km) ? km->mark : 0; 659 660 if (find_token(lg, lang)) 661 add_keymap(desc, 4, keym); 662 else if (mark <= 3 && find_token(lg, dialect)) 663 add_keymap(desc, 3, keym); 664 else if (mark <= 2 && find_token(lg, lang_abk)) 665 add_keymap(desc, 2, keym); 666 else if (mark <= 1 && find_token(lg, lang_default)) 667 add_keymap(desc, 1, keym); 668 else if (mark <= 0) 669 add_keymap(desc, 0, keym); 670 } 671 fclose(fp); 672 673 } else 674 printf("Could not open file\n"); 675 676 if (show) { 677 qsort(lang_list->sl_str, lang_list->sl_cur, sizeof(char*), 678 compare_lang); 679 printf("Currently supported languages: "); 680 for (i=0; i< (int) lang_list->sl_cur; i++) 681 printf("%s ", lang_list->sl_str[i]); 682 puts(""); 683 exit(0); 684 } 685 686 km = get_keymap("MENU"); 687 if (km) 688 /* Take note of menu title */ 689 menu = strdup(km->desc); 690 km = get_keymap("FONT"); 691 if (km) 692 /* Take note of language font */ 693 font = strdup(km->desc); 694 695 /* Remove unwanted items from list */ 696 remove_keymap("MENU"); 697 remove_keymap("FONT"); 698 699 /* Look for keymaps not in database */ 700 dirp = opendir(dir); 701 if (dirp) { 702 while ((dp = readdir(dirp)) != NULL) { 703 const char *ext = get_extension(dp->d_name); 704 if (ext) { 705 if ((!strcmp(ext, ".fnt") || 706 !strcmp(ext, ".kbd")) && 707 !get_keymap(dp->d_name)) { 708 char *q; 709 710 /* Remove any .fnt or .kbd extension */ 711 q = strdup(dp->d_name); 712 *(get_extension(q)) = '\0'; 713 add_keymap(q, 0, dp->d_name); 714 free(q); 715 716 if (verbose) 717 fprintf(stderr, 718 "'%s' not in database\n", 719 dp->d_name); 720 } 721 } 722 } 723 closedir(dirp); 724 } else 725 fprintf(stderr, "Could not open directory '%s'\n", dir); 726 727 /* Sort items in keymap */ 728 num_keymaps = get_num_keymaps(); 729 730 km_sorted = (struct keymap **) 731 malloc(num_keymaps*sizeof(struct keymap *)); 732 733 /* Make array of pointers to items in hash */ 734 items = 0; 735 SLIST_FOREACH(km, &head, entries) 736 km_sorted[items++] = km; 737 738 /* Change '8x8' to '8x08' so sort works as we might expect... */ 739 kludge_desc(km_sorted, num_keymaps); 740 741 qsort(km_sorted, num_keymaps, sizeof(struct keymap *), compare_keymap); 742 743 /* ...change back again */ 744 unkludge_desc(km_sorted, num_keymaps); 745 746 if (print) { 747 for (i=0; i<num_keymaps; i++) 748 printf("%s\n", km_sorted[i]->desc); 749 exit(0); 750 } 751 752 show_dialog(km_sorted, num_keymaps); 753 754 free(km_sorted); 755 } 756 757 /* 758 * Display usage information and exit 759 */ 760 static void 761 usage(void) 762 { 763 764 fprintf(stderr, "usage: %s\t[-K] [-V] [-d|-default] [-h|-help] " 765 "[-l|-lang language]\n\t\t[-p|-print] [-r|-restore] [-s|-show] " 766 "[-v|-verbose]\n", program); 767 exit(1); 768 } 769 770 static void 771 parse_args(int argc, char **argv) 772 { 773 int i; 774 775 for (i=1; i<argc; i++) { 776 if (argv[i][0] != '-') 777 usage(); 778 else if (!strcmp(argv[i], "-help") || !strcmp(argv[i], "-h")) 779 usage(); 780 else if (!strcmp(argv[i], "-verbose") || !strcmp(argv[i], "-v")) 781 verbose = 1; 782 else if (!strcmp(argv[i], "-lang") || !strcmp(argv[i], "-l")) 783 if (i + 1 == argc) 784 usage(); 785 else 786 lang = argv[++i]; 787 else if (!strcmp(argv[i], "-default") || !strcmp(argv[i], "-d")) 788 lang = lang_default; 789 else if (!strcmp(argv[i], "-show") || !strcmp(argv[i], "-s")) 790 show = 1; 791 else if (!strcmp(argv[i], "-print") || !strcmp(argv[i], "-p")) 792 print = 1; 793 else if (!strcmp(argv[i], "-restore") || 794 !strcmp(argv[i], "-r")) { 795 vidcontrol(font_current); 796 exit(0); 797 } else if (!strcmp(argv[i], "-K")) 798 dir = keymapdir; 799 else if (!strcmp(argv[i], "-V")) 800 dir = fontdir; 801 else 802 usage(); 803 } 804 } 805 806 /* 807 * A front-end for the 'vidfont' and 'kbdmap' programs. 808 */ 809 int 810 main(int argc, char **argv) 811 { 812 813 x11 = system("kbdcontrol -d >/dev/null"); 814 815 if (x11) { 816 fprintf(stderr, "You are not on a virtual console - " 817 "expect certain strange side-effects\n"); 818 sleep(2); 819 } 820 821 SLIST_INIT(&head); 822 823 lang = get_locale(); 824 825 program = extract_name(argv[0]); 826 827 font_current = get_font(); 828 if (font_current == NULL) 829 font_current = font_default; 830 831 if (strcmp(program, "kbdmap")) 832 dir = fontdir; 833 else 834 dir = keymapdir; 835 836 /* Parse command line arguments */ 837 parse_args(argc, argv); 838 839 /* Read and display options */ 840 menu_read(); 841 842 return 0; 843 } 844