1 /* $Header: /src/pub/tcsh/sh.file.c,v 3.28 2005/01/05 16:06:13 christos Exp $ */ 2 /* 3 * sh.file.c: File completion for csh. This file is not used in tcsh. 4 */ 5 /*- 6 * Copyright (c) 1980, 1991 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 #include "sh.h" 34 #include "ed.h" 35 36 RCSID("$Id: sh.file.c,v 3.28 2005/01/05 16:06:13 christos Exp $") 37 38 #if defined(FILEC) && defined(TIOCSTI) 39 40 /* 41 * Tenex style file name recognition, .. and more. 42 * History: 43 * Author: Ken Greer, Sept. 1975, CMU. 44 * Finally got around to adding to the Cshell., Ken Greer, Dec. 1981. 45 */ 46 47 #define ON 1 48 #define OFF 0 49 #ifndef TRUE 50 #define TRUE 1 51 #endif 52 #ifndef FALSE 53 #define FALSE 0 54 #endif 55 56 #define ESC CTL_ESC('\033') 57 58 typedef enum { 59 LIST, RECOGNIZE 60 } COMMAND; 61 62 static void setup_tty __P((int)); 63 static void back_to_col_1 __P((void)); 64 static void pushback __P((Char *)); 65 static void catn __P((Char *, Char *, int)); 66 static void copyn __P((Char *, Char *, int)); 67 static int filetype __P((Char *, Char *)); 68 static void print_by_column __P((Char *, Char *[], size_t)); 69 static Char *tilde __P((Char *, Char *)); 70 static void retype __P((void)); 71 static void beep __P((void)); 72 static void print_recognized_stuff __P((Char *)); 73 static void extract_dir_and_name __P((Char *, Char *, Char *)); 74 static Char *getitem __P((DIR *, int)); 75 static void free_items __P((Char **, size_t)); 76 static int tsearch __P((Char *, COMMAND, int)); 77 static int compare __P((const ptr_t, const ptr_t)); 78 static int recognize __P((Char *, Char *, int, size_t)); 79 static int is_prefix __P((Char *, Char *)); 80 static int is_suffix __P((Char *, Char *)); 81 static int ignored __P((Char *)); 82 83 84 /* 85 * Put this here so the binary can be patched with adb to enable file 86 * completion by default. Filec controls completion, nobeep controls 87 * ringing the terminal bell on incomplete expansions. 88 */ 89 int filec = 0; 90 91 static void 92 setup_tty(on) 93 int on; 94 { 95 #ifdef TERMIO 96 # ifdef POSIX 97 struct termios tchars; 98 # else 99 struct termio tchars; 100 # endif /* POSIX */ 101 102 # ifdef POSIX 103 (void) tcgetattr(SHIN, &tchars); 104 # else 105 (void) ioctl(SHIN, TCGETA, (ioctl_t) &tchars); 106 # endif /* POSIX */ 107 if (on) { 108 tchars.c_cc[VEOL] = ESC; 109 if (tchars.c_lflag & ICANON) 110 # ifdef POSIX 111 on = TCSADRAIN; 112 # else 113 on = TCSETA; 114 # endif /* POSIX */ 115 else { 116 # ifdef POSIX 117 on = TCSAFLUSH; 118 # else 119 on = TCSETAF; 120 # endif /* POSIX */ 121 tchars.c_lflag |= ICANON; 122 123 } 124 } 125 else { 126 tchars.c_cc[VEOL] = _POSIX_VDISABLE; 127 # ifdef POSIX 128 on = TCSADRAIN; 129 # else 130 on = TCSETA; 131 # endif /* POSIX */ 132 } 133 # ifdef POSIX 134 (void) tcsetattr(SHIN, on, &tchars); 135 # else 136 (void) ioctl(SHIN, on, (ioctl_t) &tchars); 137 # endif /* POSIX */ 138 #else 139 struct sgttyb sgtty; 140 static struct tchars tchars;/* INT, QUIT, XON, XOFF, EOF, BRK */ 141 142 if (on) { 143 (void) ioctl(SHIN, TIOCGETC, (ioctl_t) & tchars); 144 tchars.t_brkc = ESC; 145 (void) ioctl(SHIN, TIOCSETC, (ioctl_t) & tchars); 146 /* 147 * This must be done after every command: if the tty gets into raw or 148 * cbreak mode the user can't even type 'reset'. 149 */ 150 (void) ioctl(SHIN, TIOCGETP, (ioctl_t) & sgtty); 151 if (sgtty.sg_flags & (RAW | CBREAK)) { 152 sgtty.sg_flags &= ~(RAW | CBREAK); 153 (void) ioctl(SHIN, TIOCSETP, (ioctl_t) & sgtty); 154 } 155 } 156 else { 157 tchars.t_brkc = -1; 158 (void) ioctl(SHIN, TIOCSETC, (ioctl_t) & tchars); 159 } 160 #endif /* TERMIO */ 161 } 162 163 /* 164 * Move back to beginning of current line 165 */ 166 static void 167 back_to_col_1() 168 { 169 #ifdef TERMIO 170 # ifdef POSIX 171 struct termios tty, tty_normal; 172 # else 173 struct termio tty, tty_normal; 174 # endif /* POSIX */ 175 #else 176 struct sgttyb tty, tty_normal; 177 #endif /* TERMIO */ 178 179 # ifdef BSDSIGS 180 sigmask_t omask = sigblock(sigmask(SIGINT)); 181 # else 182 (void) sighold(SIGINT); 183 # endif /* BSDSIGS */ 184 185 #ifdef TERMIO 186 # ifdef POSIX 187 (void) tcgetattr(SHOUT, &tty); 188 # else 189 (void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty_normal); 190 # endif /* POSIX */ 191 tty_normal = tty; 192 tty.c_iflag &= ~INLCR; 193 tty.c_oflag &= ~ONLCR; 194 # ifdef POSIX 195 (void) tcsetattr(SHOUT, TCSANOW, &tty); 196 # else 197 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty); 198 # endif /* POSIX */ 199 (void) write(SHOUT, "\r", 1); 200 # ifdef POSIX 201 (void) tcsetattr(SHOUT, TCSANOW, &tty_normal); 202 # else 203 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty_normal); 204 # endif /* POSIX */ 205 #else 206 (void) ioctl(SHIN, TIOCGETP, (ioctl_t) & tty); 207 tty_normal = tty; 208 tty.sg_flags &= ~CRMOD; 209 (void) ioctl(SHIN, TIOCSETN, (ioctl_t) & tty); 210 (void) write(SHOUT, "\r", 1); 211 (void) ioctl(SHIN, TIOCSETN, (ioctl_t) & tty_normal); 212 #endif /* TERMIO */ 213 214 # ifdef BSDSIGS 215 (void) sigsetmask(omask); 216 # else 217 (void) sigrelse(SIGINT); 218 # endif /* BSDISGS */ 219 } 220 221 /* 222 * Push string contents back into tty queue 223 */ 224 static void 225 pushback(string) 226 Char *string; 227 { 228 Char *p; 229 #ifdef TERMIO 230 # ifdef POSIX 231 struct termios tty, tty_normal; 232 # else 233 struct termio tty, tty_normal; 234 # endif /* POSIX */ 235 #else 236 struct sgttyb tty, tty_normal; 237 #endif /* TERMIO */ 238 239 #ifdef BSDSIGS 240 sigmask_t omask = sigblock(sigmask(SIGINT)); 241 #else 242 (void) sighold(SIGINT); 243 #endif /* BSDSIGS */ 244 245 #ifdef TERMIO 246 # ifdef POSIX 247 (void) tcgetattr(SHOUT, &tty); 248 # else 249 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty); 250 # endif /* POSIX */ 251 tty_normal = tty; 252 tty.c_lflag &= ~(ECHOKE | ECHO | ECHOE | ECHOK | ECHONL | ECHOPRT | ECHOCTL); 253 # ifdef POSIX 254 (void) tcsetattr(SHOUT, TCSANOW, &tty); 255 # else 256 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty); 257 # endif /* POSIX */ 258 259 for (p = string; *p != '\0'; p++) { 260 char buf[MB_LEN_MAX]; 261 size_t i, len; 262 263 len = one_wctomb(buf, *p & CHAR); 264 for (i = 0; i < len; i++) 265 (void) ioctl(SHOUT, TIOCSTI, (ioctl_t) &buf[i]); 266 } 267 # ifdef POSIX 268 (void) tcsetattr(SHOUT, TCSANOW, &tty_normal); 269 # else 270 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty_normal); 271 # endif /* POSIX */ 272 #else 273 (void) ioctl(SHOUT, TIOCGETP, (ioctl_t) & tty); 274 tty_normal = tty; 275 tty.sg_flags &= ~ECHO; 276 (void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty); 277 278 for (p = string; c = *p; p++) 279 (void) ioctl(SHOUT, TIOCSTI, (ioctl_t) & c); 280 (void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty_normal); 281 #endif /* TERMIO */ 282 283 # ifdef BSDSIGS 284 (void) sigsetmask(omask); 285 # else 286 (void) sigrelse(SIGINT); 287 # endif /* BSDISGS */ 288 } 289 290 /* 291 * Concatenate src onto tail of des. 292 * Des is a string whose maximum length is count. 293 * Always null terminate. 294 */ 295 static void 296 catn(des, src, count) 297 Char *des, *src; 298 int count; 299 { 300 while (--count >= 0 && *des) 301 des++; 302 while (--count >= 0) 303 if ((*des++ = *src++) == 0) 304 return; 305 *des = '\0'; 306 } 307 308 /* 309 * Like strncpy but always leave room for trailing \0 310 * and always null terminate. 311 */ 312 static void 313 copyn(des, src, count) 314 Char *des, *src; 315 int count; 316 { 317 while (--count >= 0) 318 if ((*des++ = *src++) == 0) 319 return; 320 *des = '\0'; 321 } 322 323 static int 324 filetype(dir, file) 325 Char *dir, *file; 326 { 327 Char path[MAXPATHLEN]; 328 struct stat statb; 329 330 catn(Strcpy(path, dir), file, sizeof(path) / sizeof(Char)); 331 if (lstat(short2str(path), &statb) == 0) { 332 switch (statb.st_mode & S_IFMT) { 333 case S_IFDIR: 334 return ('/'); 335 336 case S_IFLNK: 337 if (stat(short2str(path), &statb) == 0 && /* follow it out */ 338 S_ISDIR(statb.st_mode)) 339 return ('>'); 340 else 341 return ('@'); 342 343 case S_IFSOCK: 344 return ('='); 345 346 default: 347 if (statb.st_mode & 0111) 348 return ('*'); 349 } 350 } 351 return (' '); 352 } 353 354 static struct winsize win; 355 356 /* 357 * Print sorted down columns 358 */ 359 static void 360 print_by_column(dir, items, count) 361 Char *dir, *items[]; 362 size_t count; 363 { 364 size_t i; 365 int rows, r, c, maxwidth = 0, columns; 366 367 if (ioctl(SHOUT, TIOCGWINSZ, (ioctl_t) & win) < 0 || win.ws_col == 0) 368 win.ws_col = 80; 369 for (i = 0; i < count; i++) 370 maxwidth = maxwidth > (r = Strlen(items[i])) ? maxwidth : r; 371 maxwidth += 2; /* for the file tag and space */ 372 columns = win.ws_col / maxwidth; 373 if (columns == 0) 374 columns = 1; 375 rows = (count + (columns - 1)) / columns; 376 for (r = 0; r < rows; r++) { 377 for (c = 0; c < columns; c++) { 378 i = c * rows + r; 379 if (i < count) { 380 int w; 381 382 xprintf("%S", items[i]); 383 xputchar(dir ? filetype(dir, items[i]) : ' '); 384 if (c < columns - 1) { /* last column? */ 385 w = Strlen(items[i]) + 1; 386 for (; w < maxwidth; w++) 387 xputchar(' '); 388 } 389 } 390 } 391 xputchar('\r'); 392 xputchar('\n'); 393 } 394 } 395 396 /* 397 * Expand file name with possible tilde usage 398 * ~person/mumble 399 * expands to 400 * home_directory_of_person/mumble 401 */ 402 static Char * 403 tilde(new, old) 404 Char *new, *old; 405 { 406 Char *o, *p; 407 struct passwd *pw; 408 static Char person[40]; 409 410 if (old[0] != '~') 411 return (Strcpy(new, old)); 412 413 for (p = person, o = &old[1]; *o && *o != '/'; *p++ = *o++); 414 *p = '\0'; 415 if (person[0] == '\0') 416 (void) Strcpy(new, varval(STRhome)); 417 else { 418 pw = getpwnam(short2str(person)); 419 if (pw == NULL) 420 return (NULL); 421 (void) Strcpy(new, str2short(pw->pw_dir)); 422 } 423 (void) Strcat(new, o); 424 return (new); 425 } 426 427 /* 428 * Cause pending line to be printed 429 */ 430 static void 431 retype() 432 { 433 #ifdef TERMIO 434 # ifdef POSIX 435 struct termios tty; 436 437 (void) tcgetattr(SHOUT, &tty); 438 # else 439 struct termio tty; 440 441 (void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty); 442 # endif /* POSIX */ 443 444 tty.c_lflag |= PENDIN; 445 446 # ifdef POSIX 447 (void) tcsetattr(SHOUT, TCSANOW, &tty); 448 # else 449 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty); 450 # endif /* POSIX */ 451 #else 452 int pending_input = LPENDIN; 453 454 (void) ioctl(SHOUT, TIOCLBIS, (ioctl_t) & pending_input); 455 #endif /* TERMIO */ 456 } 457 458 static void 459 beep() 460 { 461 if (adrof(STRnobeep) == 0) 462 #ifdef IS_ASCII 463 (void) write(SHOUT, "\007", 1); 464 #else 465 { 466 unsigned char beep_ch = CTL_ESC('\007'); 467 (void) write(SHOUT, &beep_ch, 1); 468 } 469 #endif 470 } 471 472 /* 473 * Erase that silly ^[ and 474 * print the recognized part of the string 475 */ 476 static void 477 print_recognized_stuff(recognized_part) 478 Char *recognized_part; 479 { 480 /* An optimized erasing of that silly ^[ */ 481 (void) putraw('\b'); 482 (void) putraw('\b'); 483 switch (Strlen(recognized_part)) { 484 485 case 0: /* erase two Characters: ^[ */ 486 (void) putraw(' '); 487 (void) putraw(' '); 488 (void) putraw('\b'); 489 (void) putraw('\b'); 490 break; 491 492 case 1: /* overstrike the ^, erase the [ */ 493 xprintf("%S", recognized_part); 494 (void) putraw(' '); 495 (void) putraw('\b'); 496 break; 497 498 default: /* overstrike both Characters ^[ */ 499 xprintf("%S", recognized_part); 500 break; 501 } 502 flush(); 503 } 504 505 /* 506 * Parse full path in file into 2 parts: directory and file names 507 * Should leave final slash (/) at end of dir. 508 */ 509 static void 510 extract_dir_and_name(path, dir, name) 511 Char *path, *dir, *name; 512 { 513 Char *p; 514 515 p = Strrchr(path, '/'); 516 if (p == NULL) { 517 copyn(name, path, MAXNAMLEN); 518 dir[0] = '\0'; 519 } 520 else { 521 copyn(name, ++p, MAXNAMLEN); 522 copyn(dir, path, p - path); 523 } 524 } 525 526 static Char * 527 getitem(dir_fd, looking_for_lognames) 528 DIR *dir_fd; 529 int looking_for_lognames; 530 { 531 struct passwd *pw; 532 struct dirent *dirp; 533 534 if (looking_for_lognames) { 535 #ifndef HAVE_GETPWENT 536 return (NULL); 537 #else 538 if ((pw = getpwent()) == NULL) 539 return (NULL); 540 return (str2short(pw->pw_name)); 541 #endif /* atp vmsposix */ 542 } 543 if ((dirp = readdir(dir_fd)) != NULL) 544 return (str2short(dirp->d_name)); 545 return (NULL); 546 } 547 548 static void 549 free_items(items, numitems) 550 Char **items; 551 size_t numitems; 552 { 553 size_t i; 554 555 for (i = 0; i < numitems; i++) 556 xfree((ptr_t) items[i]); 557 xfree((ptr_t) items); 558 } 559 560 #ifdef BSDSIGS 561 # define FREE_ITEMS(items, numitems) { \ 562 sigmask_t omask;\ 563 \ 564 omask = sigblock(sigmask(SIGINT));\ 565 free_items(items, numitems);\ 566 (void) sigsetmask(omask);\ 567 } 568 #else 569 # define FREE_ITEMS(items, numitems) { \ 570 (void) sighold(SIGINT);\ 571 free_items(items, numitems);\ 572 (void) sigrelse(SIGINT);\ 573 } 574 #endif /* BSDSIGS */ 575 576 /* 577 * Perform a RECOGNIZE or LIST command on string "word". 578 */ 579 static int 580 tsearch(word, command, max_word_length) 581 Char *word; 582 int max_word_length; 583 COMMAND command; 584 { 585 DIR *dir_fd; 586 int ignoring = TRUE, nignored = 0; 587 int name_length, looking_for_lognames; 588 Char tilded_dir[MAXPATHLEN + 1], dir[MAXPATHLEN + 1]; 589 Char name[MAXNAMLEN + 1], extended_name[MAXNAMLEN + 1]; 590 Char *item; 591 Char **items = NULL; 592 size_t numitems = 0, maxitems = 0; 593 594 looking_for_lognames = (*word == '~') && (Strchr(word, '/') == NULL); 595 if (looking_for_lognames) { 596 #ifdef HAVE_GETPWENT 597 (void) setpwent(); 598 #endif 599 copyn(name, &word[1], MAXNAMLEN); /* name sans ~ */ 600 dir_fd = NULL; 601 } 602 else { 603 extract_dir_and_name(word, dir, name); 604 if (tilde(tilded_dir, dir) == 0) 605 return (0); 606 dir_fd = opendir(*tilded_dir ? short2str(tilded_dir) : "."); 607 if (dir_fd == NULL) 608 return (0); 609 } 610 611 again: /* search for matches */ 612 name_length = Strlen(name); 613 for (numitems = 0; 614 (item = getitem(dir_fd, looking_for_lognames)) != NULL;) { 615 if (!is_prefix(name, item)) 616 continue; 617 /* Don't match . files on null prefix match */ 618 if (name_length == 0 && item[0] == '.' && 619 !looking_for_lognames) 620 continue; 621 if (command == LIST) { 622 if (numitems >= maxitems) { 623 maxitems += 1024; 624 if (items == NULL) 625 items = (Char **) xmalloc(sizeof(*items) * maxitems); 626 else 627 items = (Char **) xrealloc((ptr_t) items, 628 sizeof(*items) * maxitems); 629 } 630 items[numitems] = (Char *) xmalloc((size_t) (Strlen(item) + 1) * 631 sizeof(Char)); 632 copyn(items[numitems], item, MAXNAMLEN); 633 numitems++; 634 } 635 else { /* RECOGNIZE command */ 636 if (ignoring && ignored(item)) 637 nignored++; 638 else if (recognize(extended_name, 639 item, name_length, ++numitems)) 640 break; 641 } 642 } 643 if (ignoring && numitems == 0 && nignored > 0) { 644 ignoring = FALSE; 645 nignored = 0; 646 if (looking_for_lognames) { 647 #ifdef HAVE_GETPWENT 648 (void) setpwent(); 649 #endif /* atp vmsposix */ 650 } else 651 rewinddir(dir_fd); 652 goto again; 653 } 654 655 if (looking_for_lognames) { 656 #ifndef HAVE_GETPWENT 657 (void) endpwent(); 658 #endif 659 } else 660 (void) closedir(dir_fd); 661 if (numitems == 0) 662 return (0); 663 if (command == RECOGNIZE) { 664 if (looking_for_lognames) 665 copyn(word, STRtilde, 1); 666 else 667 /* put back dir part */ 668 copyn(word, dir, max_word_length); 669 /* add extended name */ 670 catn(word, extended_name, max_word_length); 671 return (numitems); 672 } 673 else { /* LIST */ 674 qsort((ptr_t) items, numitems, sizeof(items[0]), 675 (int (*) __P((const void *, const void *))) compare); 676 print_by_column(looking_for_lognames ? NULL : tilded_dir, 677 items, numitems); 678 if (items != NULL) 679 FREE_ITEMS(items, numitems); 680 } 681 return (0); 682 } 683 684 685 static int 686 compare(p, q) 687 const ptr_t p, q; 688 { 689 #ifdef WIDE_STRINGS 690 errno = 0; 691 692 return (wcscoll(*(Char **) p, *(Char **) q)); 693 #else 694 char *p1, *q1; 695 int res; 696 697 p1 = strsave(short2str(*(Char **) p)); 698 q1 = strsave(short2str(*(Char **) q)); 699 # if defined(NLS) && !defined(NOSTRCOLL) 700 errno = 0; /* strcoll sets errno, another brain-damage */ 701 res = strcoll(p1, q1); 702 # else 703 res = strcmp(p1, q1); 704 # endif /* NLS && !NOSTRCOLL */ 705 xfree (p1); 706 xfree (q1); 707 return res; 708 #endif /* not WIDE_STRINGS */ 709 } 710 711 /* 712 * Object: extend what user typed up to an ambiguity. 713 * Algorithm: 714 * On first match, copy full item (assume it'll be the only match) 715 * On subsequent matches, shorten extended_name to the first 716 * Character mismatch between extended_name and item. 717 * If we shorten it back to the prefix length, stop searching. 718 */ 719 static int 720 recognize(extended_name, item, name_length, numitems) 721 Char *extended_name, *item; 722 int name_length; 723 size_t numitems; 724 { 725 if (numitems == 1) /* 1st match */ 726 copyn(extended_name, item, MAXNAMLEN); 727 else { /* 2nd & subsequent matches */ 728 Char *x, *ent; 729 int len = 0; 730 731 x = extended_name; 732 for (ent = item; *x && *x == *ent++; x++, len++); 733 *x = '\0'; /* Shorten at 1st Char diff */ 734 if (len == name_length) /* Ambiguous to prefix? */ 735 return (-1); /* So stop now and save time */ 736 } 737 return (0); 738 } 739 740 /* 741 * Return true if check matches initial Chars in template. 742 * This differs from PWB imatch in that if check is null 743 * it matches anything. 744 */ 745 static int 746 is_prefix(check, template) 747 Char *check, *template; 748 { 749 do 750 if (*check == 0) 751 return (TRUE); 752 while (*check++ == *template++); 753 return (FALSE); 754 } 755 756 /* 757 * Return true if the Chars in template appear at the 758 * end of check, I.e., are it's suffix. 759 */ 760 static int 761 is_suffix(check, template) 762 Char *check, *template; 763 { 764 Char *c, *t; 765 766 for (c = check; *c++;); 767 for (t = template; *t++;); 768 for (;;) { 769 if (t == template) 770 return 1; 771 if (c == check || *--t != *--c) 772 return 0; 773 } 774 } 775 776 int 777 tenex(inputline, inputline_size) 778 Char *inputline; 779 int inputline_size; 780 { 781 int numitems, num_read; 782 char tinputline[BUFSIZE + 1]; 783 784 785 setup_tty(ON); 786 787 while ((num_read = read(SHIN, tinputline, BUFSIZE)) > 0) { 788 static Char delims[] = {' ', '\'', '"', '\t', ';', '&', '<', 789 '>', '(', ')', '|', '^', '%', '\0'}; 790 Char *str_end, *word_start, last_Char, should_retype; 791 int space_left; 792 COMMAND command; 793 794 tinputline[num_read] = 0; 795 Strcpy(inputline, str2short(tinputline)); 796 num_read = Strlen(inputline); 797 last_Char = inputline[num_read - 1] & ASCII; 798 799 if (last_Char == '\n' || num_read == inputline_size) 800 break; 801 command = (last_Char == ESC) ? RECOGNIZE : LIST; 802 if (command == LIST) 803 xputchar('\n'); 804 str_end = &inputline[num_read]; 805 if (last_Char == ESC) 806 --str_end; /* wipeout trailing cmd Char */ 807 *str_end = '\0'; 808 /* 809 * Find LAST occurence of a delimiter in the inputline. The word start 810 * is one Character past it. 811 */ 812 for (word_start = str_end; word_start > inputline; --word_start) 813 if (Strchr(delims, word_start[-1])) 814 break; 815 space_left = inputline_size - (word_start - inputline) - 1; 816 numitems = tsearch(word_start, command, space_left); 817 818 if (command == RECOGNIZE) { 819 /* print from str_end on */ 820 print_recognized_stuff(str_end); 821 if (numitems != 1) /* Beep = No match/ambiguous */ 822 beep(); 823 } 824 825 /* 826 * Tabs in the input line cause trouble after a pushback. tty driver 827 * won't backspace over them because column positions are now 828 * incorrect. This is solved by retyping over current line. 829 */ 830 should_retype = FALSE; 831 if (Strchr(inputline, '\t')) { /* tab Char in input line? */ 832 back_to_col_1(); 833 should_retype = TRUE; 834 } 835 if (command == LIST) /* Always retype after a LIST */ 836 should_retype = TRUE; 837 if (should_retype) 838 printprompt(0, NULL); 839 pushback(inputline); 840 if (should_retype) 841 retype(); 842 } 843 setup_tty(OFF); 844 return (num_read); 845 } 846 847 static int 848 ignored(item) 849 Char *item; 850 { 851 struct varent *vp; 852 Char **cp; 853 854 if ((vp = adrof(STRfignore)) == NULL || (cp = vp->vec) == NULL) 855 return (FALSE); 856 for (; *cp != NULL; cp++) 857 if (is_suffix(item, *cp)) 858 return (TRUE); 859 return (FALSE); 860 } 861 #endif /* FILEC && TIOCSTI */ 862