1 /* $OpenBSD: ui_lib.c,v 1.44 2020/09/25 11:25:31 tb Exp $ */ 2 /* Written by Richard Levitte (richard@levitte.org) for the OpenSSL 3 * project 2001. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 2001 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * openssl-core@openssl.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@cryptsoft.com). 56 * 57 */ 58 59 #include <string.h> 60 61 #include <openssl/opensslconf.h> 62 63 #include <openssl/buffer.h> 64 #include <openssl/err.h> 65 #include <openssl/ui.h> 66 67 #include "ui_locl.h" 68 69 static const UI_METHOD *default_UI_meth = NULL; 70 71 UI * 72 UI_new(void) 73 { 74 return (UI_new_method(NULL)); 75 } 76 77 UI * 78 UI_new_method(const UI_METHOD *method) 79 { 80 UI *ret; 81 82 if ((ret = calloc(1, sizeof(UI))) == NULL) { 83 UIerror(ERR_R_MALLOC_FAILURE); 84 return NULL; 85 } 86 if ((ret->meth = method) == NULL) 87 ret->meth = UI_get_default_method(); 88 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_UI, ret, &ret->ex_data); 89 90 return ret; 91 } 92 93 static void 94 free_string(UI_STRING *uis) 95 { 96 if (uis == NULL) 97 return; 98 if (uis->flags & OUT_STRING_FREEABLE) { 99 free((char *) uis->out_string); 100 switch (uis->type) { 101 case UIT_BOOLEAN: 102 free((char *)uis->_.boolean_data.action_desc); 103 free((char *)uis->_.boolean_data.ok_chars); 104 free((char *)uis->_.boolean_data.cancel_chars); 105 break; 106 default: 107 break; 108 } 109 } 110 free(uis); 111 } 112 113 void 114 UI_free(UI *ui) 115 { 116 if (ui == NULL) 117 return; 118 sk_UI_STRING_pop_free(ui->strings, free_string); 119 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_UI, ui, &ui->ex_data); 120 free(ui); 121 } 122 123 static int 124 allocate_string_stack(UI *ui) 125 { 126 if (ui->strings == NULL) { 127 if ((ui->strings = sk_UI_STRING_new_null()) == NULL) { 128 UIerror(ERR_R_MALLOC_FAILURE); 129 return -1; 130 } 131 } 132 return 0; 133 } 134 135 static UI_STRING * 136 general_allocate_prompt(const char *prompt, int dup_prompt, 137 enum UI_string_types type, int input_flags, char *result_buf) 138 { 139 UI_STRING *uis = NULL; 140 141 if (prompt == NULL) { 142 UIerror(ERR_R_PASSED_NULL_PARAMETER); 143 goto err; 144 } 145 if ((type == UIT_PROMPT || type == UIT_VERIFY || type == UIT_BOOLEAN) && 146 result_buf == NULL) { 147 UIerror(UI_R_NO_RESULT_BUFFER); 148 goto err; 149 } 150 151 if ((uis = calloc(1, sizeof(UI_STRING))) == NULL) { 152 UIerror(ERR_R_MALLOC_FAILURE); 153 goto err; 154 } 155 uis->out_string = prompt; 156 if (dup_prompt) { 157 if ((uis->out_string = strdup(prompt)) == NULL) { 158 UIerror(ERR_R_MALLOC_FAILURE); 159 goto err; 160 } 161 uis->flags = OUT_STRING_FREEABLE; 162 } 163 uis->input_flags = input_flags; 164 uis->type = type; 165 uis->result_buf = result_buf; 166 167 return uis; 168 169 err: 170 free_string(uis); 171 return NULL; 172 } 173 174 static int 175 general_allocate_string(UI *ui, const char *prompt, int dup_prompt, 176 enum UI_string_types type, int input_flags, char *result_buf, int minsize, 177 int maxsize, const char *test_buf) 178 { 179 UI_STRING *s; 180 int ret; 181 182 if ((s = general_allocate_prompt(prompt, dup_prompt, type, input_flags, 183 result_buf)) == NULL) 184 goto err; 185 s->_.string_data.result_minsize = minsize; 186 s->_.string_data.result_maxsize = maxsize; 187 s->_.string_data.test_buf = test_buf; 188 189 if (allocate_string_stack(ui) < 0) 190 goto err; 191 if ((ret = sk_UI_STRING_push(ui->strings, s)) <= 0) 192 goto err; 193 194 return ret; 195 196 err: 197 free_string(s); 198 return -1; 199 } 200 201 static int 202 general_allocate_boolean(UI *ui, const char *prompt, const char *action_desc, 203 const char *ok_chars, const char *cancel_chars, int dup_strings, 204 enum UI_string_types type, int input_flags, char *result_buf) 205 { 206 UI_STRING *s = NULL; 207 int ret; 208 209 if (ok_chars == NULL || cancel_chars == NULL) { 210 UIerror(ERR_R_PASSED_NULL_PARAMETER); 211 goto err; 212 } 213 if (ok_chars[strcspn(ok_chars, cancel_chars)] != '\0') { 214 UIerror(UI_R_COMMON_OK_AND_CANCEL_CHARACTERS); 215 goto err; 216 } 217 218 if ((s = general_allocate_prompt(prompt, dup_strings, type, input_flags, 219 result_buf)) == NULL) 220 goto err; 221 222 if (dup_strings) { 223 if (action_desc != NULL) { 224 if ((s->_.boolean_data.action_desc = 225 strdup(action_desc)) == NULL) { 226 UIerror(ERR_R_MALLOC_FAILURE); 227 goto err; 228 } 229 } 230 if ((s->_.boolean_data.ok_chars = strdup(ok_chars)) == NULL) { 231 UIerror(ERR_R_MALLOC_FAILURE); 232 goto err; 233 } 234 if ((s->_.boolean_data.cancel_chars = strdup(cancel_chars)) == 235 NULL) { 236 UIerror(ERR_R_MALLOC_FAILURE); 237 goto err; 238 } 239 } else { 240 s->_.boolean_data.action_desc = action_desc; 241 s->_.boolean_data.ok_chars = ok_chars; 242 s->_.boolean_data.cancel_chars = cancel_chars; 243 } 244 245 if (allocate_string_stack(ui) < 0) 246 goto err; 247 if ((ret = sk_UI_STRING_push(ui->strings, s)) <= 0) 248 goto err; 249 250 return ret; 251 252 err: 253 free_string(s); 254 return -1; 255 } 256 257 /* 258 * Returns the index to the place in the stack or -1 for error. Uses a 259 * direct reference to the prompt. 260 */ 261 int 262 UI_add_input_string(UI *ui, const char *prompt, int flags, char *result_buf, 263 int minsize, int maxsize) 264 { 265 return general_allocate_string(ui, prompt, 0, UIT_PROMPT, flags, 266 result_buf, minsize, maxsize, NULL); 267 } 268 269 /* Same as UI_add_input_string(), excepts it takes a copy of the prompt. */ 270 int 271 UI_dup_input_string(UI *ui, const char *prompt, int flags, char *result_buf, 272 int minsize, int maxsize) 273 { 274 return general_allocate_string(ui, prompt, 1, UIT_PROMPT, flags, 275 result_buf, minsize, maxsize, NULL); 276 } 277 278 int 279 UI_add_verify_string(UI *ui, const char *prompt, int flags, char *result_buf, 280 int minsize, int maxsize, const char *test_buf) 281 { 282 return general_allocate_string(ui, prompt, 0, UIT_VERIFY, flags, 283 result_buf, minsize, maxsize, test_buf); 284 } 285 286 int 287 UI_dup_verify_string(UI *ui, const char *prompt, int flags, 288 char *result_buf, int minsize, int maxsize, const char *test_buf) 289 { 290 return general_allocate_string(ui, prompt, 1, UIT_VERIFY, flags, 291 result_buf, minsize, maxsize, test_buf); 292 } 293 294 int 295 UI_add_input_boolean(UI *ui, const char *prompt, const char *action_desc, 296 const char *ok_chars, const char *cancel_chars, int flags, char *result_buf) 297 { 298 return general_allocate_boolean(ui, prompt, action_desc, ok_chars, 299 cancel_chars, 0, UIT_BOOLEAN, flags, result_buf); 300 } 301 302 int 303 UI_dup_input_boolean(UI *ui, const char *prompt, const char *action_desc, 304 const char *ok_chars, const char *cancel_chars, int flags, char *result_buf) 305 { 306 return general_allocate_boolean(ui, prompt, action_desc, ok_chars, 307 cancel_chars, 1, UIT_BOOLEAN, flags, result_buf); 308 } 309 310 int 311 UI_add_info_string(UI *ui, const char *text) 312 { 313 return general_allocate_string(ui, text, 0, UIT_INFO, 0, NULL, 0, 0, 314 NULL); 315 } 316 317 int 318 UI_dup_info_string(UI *ui, const char *text) 319 { 320 return general_allocate_string(ui, text, 1, UIT_INFO, 0, NULL, 0, 0, 321 NULL); 322 } 323 324 int 325 UI_add_error_string(UI *ui, const char *text) 326 { 327 return general_allocate_string(ui, text, 0, UIT_ERROR, 0, NULL, 0, 0, 328 NULL); 329 } 330 331 int 332 UI_dup_error_string(UI *ui, const char *text) 333 { 334 return general_allocate_string(ui, text, 1, UIT_ERROR, 0, NULL, 0, 0, 335 NULL); 336 } 337 338 char * 339 UI_construct_prompt(UI *ui, const char *object_desc, const char *object_name) 340 { 341 char *prompt; 342 343 if (ui->meth->ui_construct_prompt) 344 return ui->meth->ui_construct_prompt(ui, object_desc, 345 object_name); 346 347 if (object_desc == NULL) 348 return NULL; 349 350 if (object_name == NULL) { 351 if (asprintf(&prompt, "Enter %s:", object_desc) == -1) 352 return (NULL); 353 } else { 354 if (asprintf(&prompt, "Enter %s for %s:", object_desc, 355 object_name) == -1) 356 return (NULL); 357 } 358 359 return prompt; 360 } 361 362 void * 363 UI_add_user_data(UI *ui, void *user_data) 364 { 365 void *old_data = ui->user_data; 366 367 ui->user_data = user_data; 368 return old_data; 369 } 370 371 void * 372 UI_get0_user_data(UI *ui) 373 { 374 return ui->user_data; 375 } 376 377 const char * 378 UI_get0_result(UI *ui, int i) 379 { 380 if (i < 0) { 381 UIerror(UI_R_INDEX_TOO_SMALL); 382 return NULL; 383 } 384 if (i >= sk_UI_STRING_num(ui->strings)) { 385 UIerror(UI_R_INDEX_TOO_LARGE); 386 return NULL; 387 } 388 return UI_get0_result_string(sk_UI_STRING_value(ui->strings, i)); 389 } 390 391 static int 392 print_error(const char *str, size_t len, void *arg) 393 { 394 UI *ui = arg; 395 UI_STRING uis; 396 397 memset(&uis, 0, sizeof(uis)); 398 uis.type = UIT_ERROR; 399 uis.out_string = str; 400 401 if (ui->meth->ui_write_string && 402 !ui->meth->ui_write_string(ui, &uis)) 403 return -1; 404 return 0; 405 } 406 407 int 408 UI_process(UI *ui) 409 { 410 int i, ok = 0; 411 412 if (ui->meth->ui_open_session && !ui->meth->ui_open_session(ui)) 413 return -1; 414 415 if (ui->flags & UI_FLAG_PRINT_ERRORS) 416 ERR_print_errors_cb(print_error, ui); 417 418 for (i = 0; i < sk_UI_STRING_num(ui->strings); i++) { 419 if (ui->meth->ui_write_string && 420 !ui->meth->ui_write_string(ui, 421 sk_UI_STRING_value(ui->strings, i))) { 422 ok = -1; 423 goto err; 424 } 425 } 426 427 if (ui->meth->ui_flush) 428 switch (ui->meth->ui_flush(ui)) { 429 case -1: /* Interrupt/Cancel/something... */ 430 ok = -2; 431 goto err; 432 case 0: /* Errors */ 433 ok = -1; 434 goto err; 435 default: /* Success */ 436 ok = 0; 437 break; 438 } 439 440 for (i = 0; i < sk_UI_STRING_num(ui->strings); i++) { 441 if (ui->meth->ui_read_string) { 442 switch (ui->meth->ui_read_string(ui, 443 sk_UI_STRING_value(ui->strings, i))) { 444 case -1: /* Interrupt/Cancel/something... */ 445 ui->flags &= ~UI_FLAG_REDOABLE; 446 ok = -2; 447 goto err; 448 case 0: /* Errors */ 449 ok = -1; 450 goto err; 451 default: /* Success */ 452 ok = 0; 453 break; 454 } 455 } 456 } 457 458 err: 459 if (ui->meth->ui_close_session && !ui->meth->ui_close_session(ui)) 460 return -1; 461 return ok; 462 } 463 464 int 465 UI_ctrl(UI *ui, int cmd, long i, void *p, void (*f) (void)) 466 { 467 if (ui == NULL) { 468 UIerror(ERR_R_PASSED_NULL_PARAMETER); 469 return -1; 470 } 471 switch (cmd) { 472 case UI_CTRL_PRINT_ERRORS: 473 { 474 int save_flag = !!(ui->flags & UI_FLAG_PRINT_ERRORS); 475 if (i) 476 ui->flags |= UI_FLAG_PRINT_ERRORS; 477 else 478 ui->flags &= ~UI_FLAG_PRINT_ERRORS; 479 return save_flag; 480 } 481 case UI_CTRL_IS_REDOABLE: 482 return !!(ui->flags & UI_FLAG_REDOABLE); 483 default: 484 break; 485 } 486 UIerror(UI_R_UNKNOWN_CONTROL_COMMAND); 487 return -1; 488 } 489 490 int 491 UI_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 492 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 493 { 494 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_UI, argl, argp, 495 new_func, dup_func, free_func); 496 } 497 498 int 499 UI_set_ex_data(UI *r, int idx, void *arg) 500 { 501 return (CRYPTO_set_ex_data(&r->ex_data, idx, arg)); 502 } 503 504 void * 505 UI_get_ex_data(UI *r, int idx) 506 { 507 return (CRYPTO_get_ex_data(&r->ex_data, idx)); 508 } 509 510 void 511 UI_set_default_method(const UI_METHOD *meth) 512 { 513 default_UI_meth = meth; 514 } 515 516 const UI_METHOD * 517 UI_get_default_method(void) 518 { 519 if (default_UI_meth == NULL) { 520 default_UI_meth = UI_OpenSSL(); 521 } 522 return default_UI_meth; 523 } 524 525 const UI_METHOD * 526 UI_get_method(UI *ui) 527 { 528 return ui->meth; 529 } 530 531 const UI_METHOD * 532 UI_set_method(UI *ui, const UI_METHOD *meth) 533 { 534 ui->meth = meth; 535 return ui->meth; 536 } 537 538 539 UI_METHOD * 540 UI_create_method(const char *name) 541 { 542 UI_METHOD *ui_method = calloc(1, sizeof(UI_METHOD)); 543 544 if (ui_method && name) 545 ui_method->name = strdup(name); 546 547 return ui_method; 548 } 549 550 /* 551 * BIG FSCKING WARNING!!!! If you use this on a statically allocated method 552 * (that is, it hasn't been allocated using UI_create_method(), you deserve 553 * anything Murphy can throw at you and more! You have been warned. 554 */ 555 void 556 UI_destroy_method(UI_METHOD *ui_method) 557 { 558 free(ui_method->name); 559 ui_method->name = NULL; 560 free(ui_method); 561 } 562 563 int 564 UI_method_set_opener(UI_METHOD *method, int (*opener)(UI *ui)) 565 { 566 if (method) { 567 method->ui_open_session = opener; 568 return 0; 569 } 570 return -1; 571 } 572 573 int 574 UI_method_set_writer(UI_METHOD *method, int (*writer)(UI *ui, UI_STRING *uis)) 575 { 576 if (method) { 577 method->ui_write_string = writer; 578 return 0; 579 } 580 return -1; 581 } 582 583 int 584 UI_method_set_flusher(UI_METHOD *method, int (*flusher)(UI *ui)) 585 { 586 if (method) { 587 method->ui_flush = flusher; 588 return 0; 589 } 590 return -1; 591 } 592 593 int 594 UI_method_set_reader(UI_METHOD *method, int (*reader)(UI *ui, UI_STRING *uis)) 595 { 596 if (method) { 597 method->ui_read_string = reader; 598 return 0; 599 } 600 return -1; 601 } 602 603 int 604 UI_method_set_closer(UI_METHOD *method, int (*closer)(UI *ui)) 605 { 606 if (method) { 607 method->ui_close_session = closer; 608 return 0; 609 } 610 return -1; 611 } 612 613 int 614 UI_method_set_prompt_constructor(UI_METHOD *method, 615 char *(*prompt_constructor)(UI *ui, const char *object_desc, 616 const char *object_name)) 617 { 618 if (method) { 619 method->ui_construct_prompt = prompt_constructor; 620 return 0; 621 } 622 return -1; 623 } 624 625 int 626 (*UI_method_get_opener(const UI_METHOD * method))(UI *) 627 { 628 if (method) 629 return method->ui_open_session; 630 return NULL; 631 } 632 633 int 634 (*UI_method_get_writer(const UI_METHOD *method))(UI *, UI_STRING *) 635 { 636 if (method) 637 return method->ui_write_string; 638 return NULL; 639 } 640 641 int 642 (*UI_method_get_flusher(const UI_METHOD *method)) (UI *) 643 { 644 if (method) 645 return method->ui_flush; 646 return NULL; 647 } 648 649 int 650 (*UI_method_get_reader(const UI_METHOD *method))(UI *, UI_STRING *) 651 { 652 if (method) 653 return method->ui_read_string; 654 return NULL; 655 } 656 657 int 658 (*UI_method_get_closer(const UI_METHOD *method))(UI *) 659 { 660 if (method) 661 return method->ui_close_session; 662 return NULL; 663 } 664 665 char * 666 (*UI_method_get_prompt_constructor(const UI_METHOD *method))(UI *, const char *, 667 const char *) 668 { 669 if (method) 670 return method->ui_construct_prompt; 671 return NULL; 672 } 673 674 enum UI_string_types 675 UI_get_string_type(UI_STRING *uis) 676 { 677 if (!uis) 678 return UIT_NONE; 679 return uis->type; 680 } 681 682 int 683 UI_get_input_flags(UI_STRING *uis) 684 { 685 if (!uis) 686 return 0; 687 return uis->input_flags; 688 } 689 690 const char * 691 UI_get0_output_string(UI_STRING *uis) 692 { 693 if (!uis) 694 return NULL; 695 return uis->out_string; 696 } 697 698 const char * 699 UI_get0_action_string(UI_STRING *uis) 700 { 701 if (!uis) 702 return NULL; 703 switch (uis->type) { 704 case UIT_PROMPT: 705 case UIT_BOOLEAN: 706 return uis->_.boolean_data.action_desc; 707 default: 708 return NULL; 709 } 710 } 711 712 const char * 713 UI_get0_result_string(UI_STRING *uis) 714 { 715 if (!uis) 716 return NULL; 717 switch (uis->type) { 718 case UIT_PROMPT: 719 case UIT_VERIFY: 720 return uis->result_buf; 721 default: 722 return NULL; 723 } 724 } 725 726 const char * 727 UI_get0_test_string(UI_STRING *uis) 728 { 729 if (!uis) 730 return NULL; 731 switch (uis->type) { 732 case UIT_VERIFY: 733 return uis->_.string_data.test_buf; 734 default: 735 return NULL; 736 } 737 } 738 739 int 740 UI_get_result_minsize(UI_STRING *uis) 741 { 742 if (!uis) 743 return -1; 744 switch (uis->type) { 745 case UIT_PROMPT: 746 case UIT_VERIFY: 747 return uis->_.string_data.result_minsize; 748 default: 749 return -1; 750 } 751 } 752 753 int 754 UI_get_result_maxsize(UI_STRING *uis) 755 { 756 if (!uis) 757 return -1; 758 switch (uis->type) { 759 case UIT_PROMPT: 760 case UIT_VERIFY: 761 return uis->_.string_data.result_maxsize; 762 default: 763 return -1; 764 } 765 } 766 767 int 768 UI_set_result(UI *ui, UI_STRING *uis, const char *result) 769 { 770 const char *p; 771 int l = strlen(result); 772 773 ui->flags &= ~UI_FLAG_REDOABLE; 774 775 if (!uis) 776 return -1; 777 switch (uis->type) { 778 case UIT_PROMPT: 779 case UIT_VERIFY: 780 if (l < uis->_.string_data.result_minsize) { 781 ui->flags |= UI_FLAG_REDOABLE; 782 UIerror(UI_R_RESULT_TOO_SMALL); 783 ERR_asprintf_error_data 784 ("You must type in %d to %d characters", 785 uis->_.string_data.result_minsize, 786 uis->_.string_data.result_maxsize); 787 return -1; 788 } 789 if (l > uis->_.string_data.result_maxsize) { 790 ui->flags |= UI_FLAG_REDOABLE; 791 UIerror(UI_R_RESULT_TOO_LARGE); 792 ERR_asprintf_error_data 793 ("You must type in %d to %d characters", 794 uis->_.string_data.result_minsize, 795 uis->_.string_data.result_maxsize); 796 return -1; 797 } 798 if (!uis->result_buf) { 799 UIerror(UI_R_NO_RESULT_BUFFER); 800 return -1; 801 } 802 strlcpy(uis->result_buf, result, 803 uis->_.string_data.result_maxsize + 1); 804 break; 805 case UIT_BOOLEAN: 806 if (!uis->result_buf) { 807 UIerror(UI_R_NO_RESULT_BUFFER); 808 return -1; 809 } 810 uis->result_buf[0] = '\0'; 811 for (p = result; *p; p++) { 812 if (strchr(uis->_.boolean_data.ok_chars, *p)) { 813 uis->result_buf[0] = 814 uis->_.boolean_data.ok_chars[0]; 815 break; 816 } 817 if (strchr(uis->_.boolean_data.cancel_chars, *p)) { 818 uis->result_buf[0] = 819 uis->_.boolean_data.cancel_chars[0]; 820 break; 821 } 822 } 823 default: 824 break; 825 } 826 return 0; 827 } 828