1 /* $Header: /src/pub/tcsh/sh.file.c,v 3.22 2002/07/01 20:53:00 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 3.22 2002/07/01 20:53:00 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 Char filetype __P((Char *, Char *)); 68 static void print_by_column __P((Char *, Char *[], int)); 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 **)); 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, int)); 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 bool 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 char c; 230 #ifdef TERMIO 231 # ifdef POSIX 232 struct termios tty, tty_normal; 233 # else 234 struct termio tty, tty_normal; 235 # endif /* POSIX */ 236 #else 237 struct sgttyb tty, tty_normal; 238 #endif /* TERMIO */ 239 240 #ifdef BSDSIGS 241 sigmask_t omask = sigblock(sigmask(SIGINT)); 242 #else 243 (void) sighold(SIGINT); 244 #endif /* BSDSIGS */ 245 246 #ifdef TERMIO 247 # ifdef POSIX 248 (void) tcgetattr(SHOUT, &tty); 249 # else 250 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty); 251 # endif /* POSIX */ 252 tty_normal = tty; 253 tty.c_lflag &= ~(ECHOKE | ECHO | ECHOE | ECHOK | ECHONL | ECHOPRT | ECHOCTL); 254 # ifdef POSIX 255 (void) tcsetattr(SHOUT, TCSANOW, &tty); 256 # else 257 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty); 258 # endif /* POSIX */ 259 260 for (p = string; (c = *p) != '\0'; p++) 261 (void) ioctl(SHOUT, TIOCSTI, (ioctl_t) & c); 262 # ifdef POSIX 263 (void) tcsetattr(SHOUT, TCSANOW, &tty_normal); 264 # else 265 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty_normal); 266 # endif /* POSIX */ 267 #else 268 (void) ioctl(SHOUT, TIOCGETP, (ioctl_t) & tty); 269 tty_normal = tty; 270 tty.sg_flags &= ~ECHO; 271 (void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty); 272 273 for (p = string; c = *p; p++) 274 (void) ioctl(SHOUT, TIOCSTI, (ioctl_t) & c); 275 (void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty_normal); 276 #endif /* TERMIO */ 277 278 # ifdef BSDSIGS 279 (void) sigsetmask(omask); 280 # else 281 (void) sigrelse(SIGINT); 282 # endif /* BSDISGS */ 283 } 284 285 /* 286 * Concatenate src onto tail of des. 287 * Des is a string whose maximum length is count. 288 * Always null terminate. 289 */ 290 static void 291 catn(des, src, count) 292 Char *des, *src; 293 int count; 294 { 295 while (--count >= 0 && *des) 296 des++; 297 while (--count >= 0) 298 if ((*des++ = *src++) == 0) 299 return; 300 *des = '\0'; 301 } 302 303 /* 304 * Like strncpy but always leave room for trailing \0 305 * and always null terminate. 306 */ 307 static void 308 copyn(des, src, count) 309 Char *des, *src; 310 int count; 311 { 312 while (--count >= 0) 313 if ((*des++ = *src++) == 0) 314 return; 315 *des = '\0'; 316 } 317 318 static Char 319 filetype(dir, file) 320 Char *dir, *file; 321 { 322 Char path[MAXPATHLEN]; 323 struct stat statb; 324 325 catn(Strcpy(path, dir), file, sizeof(path) / sizeof(Char)); 326 if (lstat(short2str(path), &statb) == 0) { 327 switch (statb.st_mode & S_IFMT) { 328 case S_IFDIR: 329 return ('/'); 330 331 case S_IFLNK: 332 if (stat(short2str(path), &statb) == 0 && /* follow it out */ 333 S_ISDIR(statb.st_mode)) 334 return ('>'); 335 else 336 return ('@'); 337 338 case S_IFSOCK: 339 return ('='); 340 341 default: 342 if (statb.st_mode & 0111) 343 return ('*'); 344 } 345 } 346 return (' '); 347 } 348 349 static struct winsize win; 350 351 /* 352 * Print sorted down columns 353 */ 354 static void 355 print_by_column(dir, items, count) 356 Char *dir, *items[]; 357 int count; 358 { 359 int i, rows, r, c, maxwidth = 0, columns; 360 361 if (ioctl(SHOUT, TIOCGWINSZ, (ioctl_t) & win) < 0 || win.ws_col == 0) 362 win.ws_col = 80; 363 for (i = 0; i < count; i++) 364 maxwidth = maxwidth > (r = Strlen(items[i])) ? maxwidth : r; 365 maxwidth += 2; /* for the file tag and space */ 366 columns = win.ws_col / maxwidth; 367 if (columns == 0) 368 columns = 1; 369 rows = (count + (columns - 1)) / columns; 370 for (r = 0; r < rows; r++) { 371 for (c = 0; c < columns; c++) { 372 i = c * rows + r; 373 if (i < count) { 374 int w; 375 376 xprintf("%S", items[i]); 377 xputchar(dir ? filetype(dir, items[i]) : ' '); 378 if (c < columns - 1) { /* last column? */ 379 w = Strlen(items[i]) + 1; 380 for (; w < maxwidth; w++) 381 xputchar(' '); 382 } 383 } 384 } 385 xputchar('\r'); 386 xputchar('\n'); 387 } 388 } 389 390 /* 391 * Expand file name with possible tilde usage 392 * ~person/mumble 393 * expands to 394 * home_directory_of_person/mumble 395 */ 396 static Char * 397 tilde(new, old) 398 Char *new, *old; 399 { 400 Char *o, *p; 401 struct passwd *pw; 402 static Char person[40]; 403 404 if (old[0] != '~') 405 return (Strcpy(new, old)); 406 407 for (p = person, o = &old[1]; *o && *o != '/'; *p++ = *o++); 408 *p = '\0'; 409 if (person[0] == '\0') 410 (void) Strcpy(new, varval(STRhome)); 411 else { 412 pw = getpwnam(short2str(person)); 413 if (pw == NULL) 414 return (NULL); 415 (void) Strcpy(new, str2short(pw->pw_dir)); 416 } 417 (void) Strcat(new, o); 418 return (new); 419 } 420 421 /* 422 * Cause pending line to be printed 423 */ 424 static void 425 retype() 426 { 427 #ifdef TERMIO 428 # ifdef POSIX 429 struct termios tty; 430 431 (void) tcgetattr(SHOUT, &tty); 432 # else 433 struct termio tty; 434 435 (void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty); 436 # endif /* POSIX */ 437 438 tty.c_lflag |= PENDIN; 439 440 # ifdef POSIX 441 (void) tcsetattr(SHOUT, TCSANOW, &tty); 442 # else 443 (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty); 444 # endif /* POSIX */ 445 #else 446 int pending_input = LPENDIN; 447 448 (void) ioctl(SHOUT, TIOCLBIS, (ioctl_t) & pending_input); 449 #endif /* TERMIO */ 450 } 451 452 static void 453 beep() 454 { 455 if (adrof(STRnobeep) == 0) 456 #ifdef IS_ASCII 457 (void) write(SHOUT, "\007", 1); 458 #else 459 { 460 unsigned char beep_ch = CTL_ESC('\007'); 461 (void) write(SHOUT, &beep_ch, 1); 462 } 463 #endif 464 } 465 466 /* 467 * Erase that silly ^[ and 468 * print the recognized part of the string 469 */ 470 static void 471 print_recognized_stuff(recognized_part) 472 Char *recognized_part; 473 { 474 /* An optimized erasing of that silly ^[ */ 475 (void) putraw('\b'); 476 (void) putraw('\b'); 477 switch (Strlen(recognized_part)) { 478 479 case 0: /* erase two Characters: ^[ */ 480 (void) putraw(' '); 481 (void) putraw(' '); 482 (void) putraw('\b'); 483 (void) putraw('\b'); 484 break; 485 486 case 1: /* overstrike the ^, erase the [ */ 487 xprintf("%S", recognized_part); 488 (void) putraw(' '); 489 (void) putraw('\b'); 490 break; 491 492 default: /* overstrike both Characters ^[ */ 493 xprintf("%S", recognized_part); 494 break; 495 } 496 flush(); 497 } 498 499 /* 500 * Parse full path in file into 2 parts: directory and file names 501 * Should leave final slash (/) at end of dir. 502 */ 503 static void 504 extract_dir_and_name(path, dir, name) 505 Char *path, *dir, *name; 506 { 507 Char *p; 508 509 p = Strrchr(path, '/'); 510 if (p == NULL) { 511 copyn(name, path, MAXNAMLEN); 512 dir[0] = '\0'; 513 } 514 else { 515 copyn(name, ++p, MAXNAMLEN); 516 copyn(dir, path, p - path); 517 } 518 } 519 /* atp vmsposix - I need to remove all the setpwent 520 * getpwent endpwent stuff. VMS_POSIX has getpwnam getpwuid 521 * and getlogin. This needs fixing. (There is no access to 522 * pw->passwd in VMS - a secure system benefit :-| ) 523 */ 524 static Char * 525 getitem(dir_fd, looking_for_lognames) 526 DIR *dir_fd; 527 int looking_for_lognames; 528 { 529 struct passwd *pw; 530 struct dirent *dirp; 531 532 if (looking_for_lognames) { 533 #ifdef _VMS_POSIX 534 return (NULL); 535 #else 536 if ((pw = getpwent()) == NULL) 537 return (NULL); 538 return (str2short(pw->pw_name)); 539 #endif /* atp vmsposix */ 540 } 541 if ((dirp = readdir(dir_fd)) != NULL) 542 return (str2short(dirp->d_name)); 543 return (NULL); 544 } 545 546 static void 547 free_items(items) 548 Char **items; 549 { 550 int i; 551 552 for (i = 0; items[i]; i++) 553 xfree((ptr_t) items[i]); 554 xfree((ptr_t) items); 555 } 556 557 #ifdef BSDSIGS 558 # define FREE_ITEMS(items) { \ 559 sigmask_t omask;\ 560 \ 561 omask = sigblock(sigmask(SIGINT));\ 562 free_items(items);\ 563 items = NULL;\ 564 (void) sigsetmask(omask);\ 565 } 566 #else 567 # define FREE_ITEMS(items) { \ 568 (void) sighold(SIGINT);\ 569 free_items(items);\ 570 items = NULL;\ 571 (void) sigrelse(SIGINT);\ 572 } 573 #endif /* BSDSIGS */ 574 575 /* 576 * Perform a RECOGNIZE or LIST command on string "word". 577 */ 578 static int 579 tsearch(word, command, max_word_length) 580 Char *word; 581 int max_word_length; 582 COMMAND command; 583 { 584 static Char **items = NULL; 585 DIR *dir_fd; 586 int numitems = 0, 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; 591 592 #define MAXITEMS 1024 593 594 if (items != NULL) 595 FREE_ITEMS(items); 596 597 looking_for_lognames = (*word == '~') && (Strchr(word, '/') == NULL); 598 if (looking_for_lognames) { 599 #ifndef _VMS_POSIX 600 (void) setpwent(); 601 #endif /*atp vmsposix */ 602 copyn(name, &word[1], MAXNAMLEN); /* name sans ~ */ 603 dir_fd = NULL; 604 } 605 else { 606 extract_dir_and_name(word, dir, name); 607 if (tilde(tilded_dir, dir) == 0) 608 return (0); 609 dir_fd = opendir(*tilded_dir ? short2str(tilded_dir) : "."); 610 if (dir_fd == NULL) 611 return (0); 612 } 613 614 again: /* search for matches */ 615 name_length = Strlen(name); 616 for (numitems = 0; 617 (item = getitem(dir_fd, looking_for_lognames)) != NULL;) { 618 if (!is_prefix(name, item)) 619 continue; 620 /* Don't match . files on null prefix match */ 621 if (name_length == 0 && item[0] == '.' && 622 !looking_for_lognames) 623 continue; 624 if (command == LIST) { 625 if (numitems >= MAXITEMS) { 626 xprintf(CGETS(14, 1, "\nYikes!! Too many %s!!\n"), 627 looking_for_lognames ? 628 CGETS(14, 2, "names in password file") : 629 CGETS(14, 3, "files")); 630 break; 631 } 632 /* 633 * From Beto Appleton (beto@aixwiz.austin.ibm.com) 634 * typing "./control-d" will cause the csh to core-dump. 635 * the problem can be reproduce as following: 636 * 1. set ignoreeof 637 * 2. set filec 638 * 3. create a directory with 1050 files 639 * 4. typing "./control-d" will cause the csh to core-dump 640 * Solution: Add + 1 to MAXITEMS 641 */ 642 if (items == NULL) 643 items = (Char **) xcalloc(sizeof(items[0]), MAXITEMS + 1); 644 items[numitems] = (Char *) xmalloc((size_t) (Strlen(item) + 1) * 645 sizeof(Char)); 646 copyn(items[numitems], item, MAXNAMLEN); 647 numitems++; 648 } 649 else { /* RECOGNIZE command */ 650 if (ignoring && ignored(item)) 651 nignored++; 652 else if (recognize(extended_name, 653 item, name_length, ++numitems)) 654 break; 655 } 656 } 657 if (ignoring && numitems == 0 && nignored > 0) { 658 ignoring = FALSE; 659 nignored = 0; 660 if (looking_for_lognames) 661 #ifndef _VMS_POSIX 662 (void) setpwent(); 663 #endif /* atp vmsposix */ 664 else 665 rewinddir(dir_fd); 666 goto again; 667 } 668 669 if (looking_for_lognames) 670 #ifndef _VMS_POSIX 671 (void) endpwent(); 672 #endif /*atp vmsposix */ 673 else 674 (void) closedir(dir_fd); 675 if (numitems == 0) 676 return (0); 677 if (command == RECOGNIZE) { 678 if (looking_for_lognames) 679 copyn(word, STRtilde, 1); 680 else 681 /* put back dir part */ 682 copyn(word, dir, max_word_length); 683 /* add extended name */ 684 catn(word, extended_name, max_word_length); 685 return (numitems); 686 } 687 else { /* LIST */ 688 qsort((ptr_t) items, (size_t) numitems, sizeof(items[0]), 689 (int (*) __P((const void *, const void *))) compare); 690 print_by_column(looking_for_lognames ? NULL : tilded_dir, 691 items, numitems); 692 if (items != NULL) 693 FREE_ITEMS(items); 694 } 695 return (0); 696 } 697 698 699 static int 700 compare(p, q) 701 const ptr_t p, q; 702 { 703 #if defined(NLS) && !defined(NOSTRCOLL) 704 errno = 0; /* strcoll sets errno, another brain-damage */ 705 706 return (strcoll(*(char **) p, *(char **) q)); 707 #else 708 return (strcmp(*(char **) p, *(char **) q)); 709 #endif /* NLS && !NOSTRCOLL */ 710 } 711 712 /* 713 * Object: extend what user typed up to an ambiguity. 714 * Algorithm: 715 * On first match, copy full item (assume it'll be the only match) 716 * On subsequent matches, shorten extended_name to the first 717 * Character mismatch between extended_name and item. 718 * If we shorten it back to the prefix length, stop searching. 719 */ 720 static int 721 recognize(extended_name, item, name_length, numitems) 722 Char *extended_name, *item; 723 int name_length, 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]; 783 784 785 setup_tty(ON); 786 787 while ((num_read = read(SHIN, tinputline, BUFSIZE)) > 0) { 788 int i; 789 static Char delims[] = {' ', '\'', '"', '\t', ';', '&', '<', 790 '>', '(', ')', '|', '^', '%', '\0'}; 791 Char *str_end, *word_start, last_Char, should_retype; 792 int space_left; 793 COMMAND command; 794 795 for (i = 0; i < num_read; i++) 796 inputline[i] = (unsigned char) tinputline[i]; 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