1 /* crypto/ui/ui_openssl.c -*- mode:C; c-file-style: "eay" -*- */ 2 /* Written by Richard Levitte (richard@levitte.org) and others 3 * for the OpenSSL 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 /* The lowest level part of this file was previously in crypto/des/read_pwd.c, 60 * Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 61 * All rights reserved. 62 * 63 * This package is an SSL implementation written 64 * by Eric Young (eay@cryptsoft.com). 65 * The implementation was written so as to conform with Netscapes SSL. 66 * 67 * This library is free for commercial and non-commercial use as long as 68 * the following conditions are aheared to. The following conditions 69 * apply to all code found in this distribution, be it the RC4, RSA, 70 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 71 * included with this distribution is covered by the same copyright terms 72 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 73 * 74 * Copyright remains Eric Young's, and as such any Copyright notices in 75 * the code are not to be removed. 76 * If this package is used in a product, Eric Young should be given attribution 77 * as the author of the parts of the library used. 78 * This can be in the form of a textual message at program startup or 79 * in documentation (online or textual) provided with the package. 80 * 81 * Redistribution and use in source and binary forms, with or without 82 * modification, are permitted provided that the following conditions 83 * are met: 84 * 1. Redistributions of source code must retain the copyright 85 * notice, this list of conditions and the following disclaimer. 86 * 2. Redistributions in binary form must reproduce the above copyright 87 * notice, this list of conditions and the following disclaimer in the 88 * documentation and/or other materials provided with the distribution. 89 * 3. All advertising materials mentioning features or use of this software 90 * must display the following acknowledgement: 91 * "This product includes cryptographic software written by 92 * Eric Young (eay@cryptsoft.com)" 93 * The word 'cryptographic' can be left out if the rouines from the library 94 * being used are not cryptographic related :-). 95 * 4. If you include any Windows specific code (or a derivative thereof) from 96 * the apps directory (application code) you must include an acknowledgement: 97 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 98 * 99 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 100 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 101 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 102 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 103 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 104 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 105 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 106 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 107 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 108 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 109 * SUCH DAMAGE. 110 * 111 * The licence and distribution terms for any publically available version or 112 * derivative of this code cannot be changed. i.e. this code cannot simply be 113 * copied and put under another distribution licence 114 * [including the GNU Public Licence.] 115 */ 116 117 118 #include <openssl/e_os2.h> 119 120 #if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) 121 # ifdef OPENSSL_UNISTD 122 # include OPENSSL_UNISTD 123 # else 124 # include <unistd.h> 125 # endif 126 /* If unistd.h defines _POSIX_VERSION, we conclude that we 127 * are on a POSIX system and have sigaction and termios. */ 128 # if defined(_POSIX_VERSION) 129 130 # define SIGACTION 131 # if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY) 132 # define TERMIOS 133 # endif 134 135 # endif 136 #endif 137 138 #ifdef WIN16TTY 139 # undef OPENSSL_SYS_WIN16 140 # undef WIN16 141 # undef _WINDOWS 142 # include <graph.h> 143 #endif 144 145 /* 06-Apr-92 Luke Brennan Support for VMS */ 146 #include "ui_locl.h" 147 #include "cryptlib.h" 148 #include <signal.h> 149 #include <stdio.h> 150 #include <string.h> 151 #include <errno.h> 152 153 #ifdef OPENSSL_SYS_VMS /* prototypes for sys$whatever */ 154 # include <starlet.h> 155 # ifdef __DECC 156 # pragma message disable DOLLARID 157 # endif 158 #endif 159 160 #ifdef WIN_CONSOLE_BUG 161 # include <windows.h> 162 #ifndef OPENSSL_SYS_WINCE 163 # include <wincon.h> 164 #endif 165 #endif 166 167 168 /* There are 5 types of terminal interface supported, 169 * TERMIO, TERMIOS, VMS, MSDOS and SGTTY 170 */ 171 172 #if defined(__sgi) && !defined(TERMIOS) 173 # define TERMIOS 174 # undef TERMIO 175 # undef SGTTY 176 #endif 177 178 #if defined(linux) && !defined(TERMIO) 179 # undef TERMIOS 180 # define TERMIO 181 # undef SGTTY 182 #endif 183 184 #ifdef _LIBC 185 # undef TERMIOS 186 # define TERMIO 187 # undef SGTTY 188 #endif 189 190 #if !defined(TERMIO) && !defined(TERMIOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(MAC_OS_GUSI_SOURCE) 191 # undef TERMIOS 192 # undef TERMIO 193 # define SGTTY 194 #endif 195 196 #if defined(OPENSSL_SYS_VXWORKS) 197 #undef TERMIOS 198 #undef TERMIO 199 #undef SGTTY 200 #endif 201 202 #ifdef TERMIOS 203 # include <termios.h> 204 # define TTY_STRUCT struct termios 205 # define TTY_FLAGS c_lflag 206 # define TTY_get(tty,data) tcgetattr(tty,data) 207 # define TTY_set(tty,data) tcsetattr(tty,TCSANOW,data) 208 #endif 209 210 #ifdef TERMIO 211 # include <termio.h> 212 # define TTY_STRUCT struct termio 213 # define TTY_FLAGS c_lflag 214 # define TTY_get(tty,data) ioctl(tty,TCGETA,data) 215 # define TTY_set(tty,data) ioctl(tty,TCSETA,data) 216 #endif 217 218 #ifdef SGTTY 219 # include <sgtty.h> 220 # define TTY_STRUCT struct sgttyb 221 # define TTY_FLAGS sg_flags 222 # define TTY_get(tty,data) ioctl(tty,TIOCGETP,data) 223 # define TTY_set(tty,data) ioctl(tty,TIOCSETP,data) 224 #endif 225 226 #if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(OPENSSL_SYS_SUNOS) 227 # include <sys/ioctl.h> 228 #endif 229 230 #ifdef OPENSSL_SYS_MSDOS 231 # include <conio.h> 232 #endif 233 234 #ifdef OPENSSL_SYS_VMS 235 # include <ssdef.h> 236 # include <iodef.h> 237 # include <ttdef.h> 238 # include <descrip.h> 239 struct IOSB { 240 short iosb$w_value; 241 short iosb$w_count; 242 long iosb$l_info; 243 }; 244 #endif 245 246 #ifdef OPENSSL_SYS_SUNOS 247 typedef int sig_atomic_t; 248 #endif 249 250 #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(MAC_OS_GUSI_SOURCE) 251 /* 252 * This one needs work. As a matter of fact the code is unoperational 253 * and this is only a trick to get it compiled. 254 * <appro@fy.chalmers.se> 255 */ 256 # define TTY_STRUCT int 257 #endif 258 259 #ifndef NX509_SIG 260 # define NX509_SIG 32 261 #endif 262 263 264 /* Define globals. They are protected by a lock */ 265 #ifdef SIGACTION 266 static struct sigaction savsig[NX509_SIG]; 267 #else 268 static void (*savsig[NX509_SIG])(int ); 269 #endif 270 271 #ifdef OPENSSL_SYS_VMS 272 static struct IOSB iosb; 273 static $DESCRIPTOR(terminal,"TT"); 274 static long tty_orig[3], tty_new[3]; /* XXX Is there any guarantee that this will always suffice for the actual structures? */ 275 static long status; 276 static unsigned short channel = 0; 277 #else 278 #if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__) 279 static TTY_STRUCT tty_orig,tty_new; 280 #endif 281 #endif 282 static FILE *tty_in, *tty_out; 283 static int is_a_tty; 284 285 /* Declare static functions */ 286 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE) 287 static void read_till_nl(FILE *); 288 static void recsig(int); 289 static void pushsig(void); 290 static void popsig(void); 291 #endif 292 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16) 293 static int noecho_fgets(char *buf, int size, FILE *tty); 294 #endif 295 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl); 296 297 static int read_string(UI *ui, UI_STRING *uis); 298 static int write_string(UI *ui, UI_STRING *uis); 299 300 static int open_console(UI *ui); 301 static int echo_console(UI *ui); 302 static int noecho_console(UI *ui); 303 static int close_console(UI *ui); 304 305 static UI_METHOD ui_openssl = 306 { 307 "OpenSSL default user interface", 308 open_console, 309 write_string, 310 NULL, /* No flusher is needed for command lines */ 311 read_string, 312 close_console, 313 NULL 314 }; 315 316 /* The method with all the built-in thingies */ 317 UI_METHOD *UI_OpenSSL(void) 318 { 319 return &ui_openssl; 320 } 321 322 /* The following function makes sure that info and error strings are printed 323 before any prompt. */ 324 static int write_string(UI *ui, UI_STRING *uis) 325 { 326 switch (UI_get_string_type(uis)) 327 { 328 case UIT_ERROR: 329 case UIT_INFO: 330 fputs(UI_get0_output_string(uis), tty_out); 331 fflush(tty_out); 332 break; 333 default: 334 break; 335 } 336 return 1; 337 } 338 339 static int read_string(UI *ui, UI_STRING *uis) 340 { 341 int ok = 0; 342 343 switch (UI_get_string_type(uis)) 344 { 345 case UIT_BOOLEAN: 346 fputs(UI_get0_output_string(uis), tty_out); 347 fputs(UI_get0_action_string(uis), tty_out); 348 fflush(tty_out); 349 return read_string_inner(ui, uis, 350 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0); 351 case UIT_PROMPT: 352 fputs(UI_get0_output_string(uis), tty_out); 353 fflush(tty_out); 354 return read_string_inner(ui, uis, 355 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1); 356 case UIT_VERIFY: 357 fprintf(tty_out,"Verifying - %s", 358 UI_get0_output_string(uis)); 359 fflush(tty_out); 360 if ((ok = read_string_inner(ui, uis, 361 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1)) <= 0) 362 return ok; 363 if (strcmp(UI_get0_result_string(uis), 364 UI_get0_test_string(uis)) != 0) 365 { 366 fprintf(tty_out,"Verify failure\n"); 367 fflush(tty_out); 368 return 0; 369 } 370 break; 371 default: 372 break; 373 } 374 return 1; 375 } 376 377 378 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE) 379 /* Internal functions to read a string without echoing */ 380 static void read_till_nl(FILE *in) 381 { 382 #define SIZE 4 383 char buf[SIZE+1]; 384 385 do { 386 if (fgets(buf,sizeof(buf),in) == NULL) 387 break; 388 } while (strchr(buf,'\n') == NULL); 389 } 390 391 static volatile sig_atomic_t intr_signal; 392 #endif 393 394 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl) 395 { 396 static int ps; 397 int ok; 398 char result[BUFSIZ]; 399 int maxsize = BUFSIZ-1; 400 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE) 401 char *p; 402 403 intr_signal=0; 404 ok=0; 405 ps=0; 406 407 pushsig(); 408 ps=1; 409 410 if (!echo && !noecho_console(ui)) 411 goto error; 412 ps=2; 413 414 result[0]='\0'; 415 #ifdef OPENSSL_SYS_MSDOS 416 if (!echo) 417 { 418 noecho_fgets(result,maxsize,tty_in); 419 p=result; /* FIXME: noecho_fgets doesn't return errors */ 420 } 421 else 422 p=fgets(result,maxsize,tty_in); 423 #else 424 p=fgets(result,maxsize,tty_in); 425 #endif 426 if(!p) 427 goto error; 428 if (feof(tty_in)) goto error; 429 if (ferror(tty_in)) goto error; 430 if ((p=(char *)strchr(result,'\n')) != NULL) 431 { 432 if (strip_nl) 433 *p='\0'; 434 } 435 else 436 read_till_nl(tty_in); 437 if (UI_set_result(ui, uis, result) >= 0) 438 ok=1; 439 440 error: 441 if (intr_signal == SIGINT) 442 ok=-1; 443 if (!echo) fprintf(tty_out,"\n"); 444 if (ps >= 2 && !echo && !echo_console(ui)) 445 ok=0; 446 447 if (ps >= 1) 448 popsig(); 449 #else 450 ok=1; 451 #endif 452 453 OPENSSL_cleanse(result,BUFSIZ); 454 return ok; 455 } 456 457 458 /* Internal functions to open, handle and close a channel to the console. */ 459 static int open_console(UI *ui) 460 { 461 CRYPTO_w_lock(CRYPTO_LOCK_UI); 462 is_a_tty = 1; 463 464 #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(OPENSSL_SYS_VXWORKS) 465 tty_in=stdin; 466 tty_out=stderr; 467 #else 468 # ifdef OPENSSL_SYS_MSDOS 469 # define DEV_TTY "con" 470 # else 471 # define DEV_TTY "/dev/tty" 472 # endif 473 if ((tty_in=fopen(DEV_TTY,"r")) == NULL) 474 tty_in=stdin; 475 if ((tty_out=fopen(DEV_TTY,"w")) == NULL) 476 tty_out=stderr; 477 #endif 478 479 #if defined(TTY_get) && !defined(OPENSSL_SYS_VMS) 480 if (TTY_get(fileno(tty_in),&tty_orig) == -1) 481 { 482 #ifdef ENOTTY 483 if (errno == ENOTTY) 484 is_a_tty=0; 485 else 486 #endif 487 #ifdef EINVAL 488 /* Ariel Glenn ariel@columbia.edu reports that solaris 489 * can return EINVAL instead. This should be ok */ 490 if (errno == EINVAL) 491 is_a_tty=0; 492 else 493 #endif 494 return 0; 495 } 496 #endif 497 #ifdef OPENSSL_SYS_VMS 498 status = sys$assign(&terminal,&channel,0,0); 499 if (status != SS$_NORMAL) 500 return 0; 501 status=sys$qiow(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0); 502 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) 503 return 0; 504 #endif 505 return 1; 506 } 507 508 static int noecho_console(UI *ui) 509 { 510 #ifdef TTY_FLAGS 511 memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig)); 512 tty_new.TTY_FLAGS &= ~ECHO; 513 #endif 514 515 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS) 516 if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1)) 517 return 0; 518 #endif 519 #ifdef OPENSSL_SYS_VMS 520 tty_new[0] = tty_orig[0]; 521 tty_new[1] = tty_orig[1] | TT$M_NOECHO; 522 tty_new[2] = tty_orig[2]; 523 status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0); 524 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) 525 return 0; 526 #endif 527 return 1; 528 } 529 530 static int echo_console(UI *ui) 531 { 532 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS) 533 memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig)); 534 tty_new.TTY_FLAGS |= ECHO; 535 #endif 536 537 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS) 538 if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1)) 539 return 0; 540 #endif 541 #ifdef OPENSSL_SYS_VMS 542 tty_new[0] = tty_orig[0]; 543 tty_new[1] = tty_orig[1] & ~TT$M_NOECHO; 544 tty_new[2] = tty_orig[2]; 545 status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0); 546 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) 547 return 0; 548 #endif 549 return 1; 550 } 551 552 static int close_console(UI *ui) 553 { 554 if (tty_in != stdin) fclose(tty_in); 555 if (tty_out != stderr) fclose(tty_out); 556 #ifdef OPENSSL_SYS_VMS 557 status = sys$dassgn(channel); 558 #endif 559 CRYPTO_w_unlock(CRYPTO_LOCK_UI); 560 561 return 1; 562 } 563 564 565 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE) 566 /* Internal functions to handle signals and act on them */ 567 static void pushsig(void) 568 { 569 int i; 570 #ifdef SIGACTION 571 struct sigaction sa; 572 573 memset(&sa,0,sizeof sa); 574 sa.sa_handler=recsig; 575 #endif 576 577 for (i=1; i<NX509_SIG; i++) 578 { 579 #ifdef SIGUSR1 580 if (i == SIGUSR1) 581 continue; 582 #endif 583 #ifdef SIGUSR2 584 if (i == SIGUSR2) 585 continue; 586 #endif 587 #ifdef SIGKILL 588 if (i == SIGKILL) /* We can't make any action on that. */ 589 continue; 590 #endif 591 #ifdef SIGACTION 592 sigaction(i,&sa,&savsig[i]); 593 #else 594 savsig[i]=signal(i,recsig); 595 #endif 596 } 597 598 #ifdef SIGWINCH 599 signal(SIGWINCH,SIG_DFL); 600 #endif 601 } 602 603 static void popsig(void) 604 { 605 int i; 606 607 for (i=1; i<NX509_SIG; i++) 608 { 609 #ifdef SIGUSR1 610 if (i == SIGUSR1) 611 continue; 612 #endif 613 #ifdef SIGUSR2 614 if (i == SIGUSR2) 615 continue; 616 #endif 617 #ifdef SIGACTION 618 sigaction(i,&savsig[i],NULL); 619 #else 620 signal(i,savsig[i]); 621 #endif 622 } 623 } 624 625 static void recsig(int i) 626 { 627 intr_signal=i; 628 } 629 #endif 630 631 /* Internal functions specific for Windows */ 632 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE) 633 static int noecho_fgets(char *buf, int size, FILE *tty) 634 { 635 int i; 636 char *p; 637 638 p=buf; 639 for (;;) 640 { 641 if (size == 0) 642 { 643 *p='\0'; 644 break; 645 } 646 size--; 647 #ifdef WIN16TTY 648 i=_inchar(); 649 #else 650 i=getch(); 651 #endif 652 if (i == '\r') i='\n'; 653 *(p++)=i; 654 if (i == '\n') 655 { 656 *p='\0'; 657 break; 658 } 659 } 660 #ifdef WIN_CONSOLE_BUG 661 /* Win95 has several evil console bugs: one of these is that the 662 * last character read using getch() is passed to the next read: this is 663 * usually a CR so this can be trouble. No STDIO fix seems to work but 664 * flushing the console appears to do the trick. 665 */ 666 { 667 HANDLE inh; 668 inh = GetStdHandle(STD_INPUT_HANDLE); 669 FlushConsoleInputBuffer(inh); 670 } 671 #endif 672 return(strlen(buf)); 673 } 674 #endif 675