contrib/tcsh-6/sh.file.c

   1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.file.c,v 3.38 2015/03/07 18:07:46 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("$tcsh: sh.file.c,v 3.38 2015/03/07 18:07:46 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              (int);
  63 static  void     back_to_col_1          (void);
  64 static  void     pushback               (const Char *);
  65 static  int      filetype               (const Char *, const Char *);
  66 static  void     print_by_column        (const Char *, Char *[], size_t);
  67 static  Char    *tilde                  (const Char *);
  68 static  void     retype                 (void);
  69 static  void     beep                   (void);
  70 static  void     print_recognized_stuff (const Char *);
  71 static  void     extract_dir_and_name   (const Char *, Char **, const Char **);
  72 static  Char    *getitem                (DIR *, int);
  73 static  size_t   tsearch                (Char *, COMMAND, size_t);
  74 static  int      compare                (const void *, const void *);
  75 static  int      recognize              (Char **, Char *, size_t, size_t);
  76 static  int      is_prefix              (const Char *, const Char *);
  77 static  int      is_suffix              (const Char *, const Char *);
  78 static  int      ignored                (const Char *);
  79
  80
  81 /*
  82  * Put this here so the binary can be patched with adb to enable file
  83  * completion by default.  Filec controls completion, nobeep controls
  84  * ringing the terminal bell on incomplete expansions.
  85  */
  86 int    filec = 0;
  87
  88 static void
  89 setup_tty(int on)
  90 {
  91 #ifdef TERMIO
  92 # ifdef POSIX
  93     struct termios tchars;
  94 # else
  95     struct termio tchars;
  96 # endif /* POSIX */
  97
  98 # ifdef POSIX
  99     (void) tcgetattr(SHIN, &tchars);
 100 # else
 101     (void) ioctl(SHIN, TCGETA, (ioctl_t) &tchars);
 102 # endif /* POSIX */
 103     if (on) {
 104         tchars.c_cc[VEOL] = ESC;
 105         if (tchars.c_lflag & ICANON)
 106 # ifdef POSIX
 107             on = TCSADRAIN;
 108 # else
 109             on = TCSETA;
 110 # endif /* POSIX */
 111         else {
 112 # ifdef POSIX
 113             on = TCSAFLUSH;
 114 # else
 115             on = TCSETAF;
 116 # endif /* POSIX */
 117             tchars.c_lflag |= ICANON;
 118
 119         }
 120     }
 121     else {
 122         tchars.c_cc[VEOL] = _POSIX_VDISABLE;
 123 # ifdef POSIX
 124         on = TCSADRAIN;
 125 # else
 126         on = TCSETA;
 127 # endif /* POSIX */
 128     }
 129 # ifdef POSIX
 130     (void) xtcsetattr(SHIN, on, &tchars);
 131 # else
 132     (void) ioctl(SHIN, on, (ioctl_t) &tchars);
 133 # endif /* POSIX */
 134 #else
 135     struct sgttyb sgtty;
 136     static struct tchars tchars;/* INT, QUIT, XON, XOFF, EOF, BRK */
 137
 138     if (on) {
 139         (void) ioctl(SHIN, TIOCGETC, (ioctl_t) & tchars);
 140         tchars.t_brkc = ESC;
 141         (void) ioctl(SHIN, TIOCSETC, (ioctl_t) & tchars);
 142         /*
 143          * This must be done after every command: if the tty gets into raw or
 144          * cbreak mode the user can't even type 'reset'.
 145          */
 146         (void) ioctl(SHIN, TIOCGETP, (ioctl_t) & sgtty);
 147         if (sgtty.sg_flags & (RAW | CBREAK)) {
 148             sgtty.sg_flags &= ~(RAW | CBREAK);
 149             (void) ioctl(SHIN, TIOCSETP, (ioctl_t) & sgtty);
 150         }
 151     }
 152     else {
 153         tchars.t_brkc = -1;
 154         (void) ioctl(SHIN, TIOCSETC, (ioctl_t) & tchars);
 155     }
 156 #endif /* TERMIO */
 157 }
 158
 159 /*
 160  * Move back to beginning of current line
 161  */
 162 static void
 163 back_to_col_1(void)
 164 {
 165 #ifdef TERMIO
 166 # ifdef POSIX
 167     struct termios tty, tty_normal;
 168 # else
 169     struct termio tty, tty_normal;
 170 # endif /* POSIX */
 171 #else
 172     struct sgttyb tty, tty_normal;
 173 #endif /* TERMIO */
 174
 175     pintr_disabled++;
 176     cleanup_push(&pintr_disabled, disabled_cleanup);
 177
 178 #ifdef TERMIO
 179 # ifdef POSIX
 180     (void) tcgetattr(SHOUT, &tty);
 181 # else
 182     (void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty_normal);
 183 # endif /* POSIX */
 184     tty_normal = tty;
 185     tty.c_iflag &= ~INLCR;
 186     tty.c_oflag &= ~ONLCR;
 187 # ifdef POSIX
 188     (void) xtcsetattr(SHOUT, TCSANOW, &tty);
 189 # else
 190     (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
 191 # endif /* POSIX */
 192     (void) xwrite(SHOUT, "\r", 1);
 193 # ifdef POSIX
 194     (void) xtcsetattr(SHOUT, TCSANOW, &tty_normal);
 195 # else
 196     (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty_normal);
 197 # endif /* POSIX */
 198 #else
 199     (void) ioctl(SHIN, TIOCGETP, (ioctl_t) & tty);
 200     tty_normal = tty;
 201     tty.sg_flags &= ~CRMOD;
 202     (void) ioctl(SHIN, TIOCSETN, (ioctl_t) & tty);
 203     (void) xwrite(SHOUT, "\r", 1);
 204     (void) ioctl(SHIN, TIOCSETN, (ioctl_t) & tty_normal);
 205 #endif /* TERMIO */
 206
 207     cleanup_until(&pintr_disabled);
 208 }
 209
 210 /*
 211  * Push string contents back into tty queue
 212  */
 213 static void
 214 pushback(const Char *string)
 215 {
 216     const Char *p;
 217 #ifdef TERMIO
 218 # ifdef POSIX
 219     struct termios tty, tty_normal;
 220 # else
 221     struct termio tty, tty_normal;
 222 # endif /* POSIX */
 223 #else
 224     struct sgttyb tty, tty_normal;
 225 #endif /* TERMIO */
 226
 227     pintr_disabled++;
 228     cleanup_push(&pintr_disabled, disabled_cleanup);
 229
 230 #ifdef TERMIO
 231 # ifdef POSIX
 232     (void) tcgetattr(SHOUT, &tty);
 233 # else
 234     (void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty);
 235 # endif /* POSIX */
 236     tty_normal = tty;
 237     tty.c_lflag &= ~(ECHOKE | ECHO | ECHOE | ECHOK | ECHONL |
 238 #ifndef __QNXNTO__
 239         ECHOPRT |
 240 #endif
 241         ECHOCTL);
 242 # ifdef POSIX
 243     (void) xtcsetattr(SHOUT, TCSANOW, &tty);
 244 # else
 245     (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
 246 # endif /* POSIX */
 247
 248     for (p = string; *p != '\0'; p++) {
 249         char buf[MB_LEN_MAX];
 250         size_t i, len;
 251
 252         len = one_wctomb(buf, *p & CHAR);
 253         for (i = 0; i < len; i++)
 254             (void) ioctl(SHOUT, TIOCSTI, (ioctl_t) &buf[i]);
 255     }
 256 # ifdef POSIX
 257     (void) xtcsetattr(SHOUT, TCSANOW, &tty_normal);
 258 # else
 259     (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty_normal);
 260 # endif /* POSIX */
 261 #else
 262     (void) ioctl(SHOUT, TIOCGETP, (ioctl_t) & tty);
 263     tty_normal = tty;
 264     tty.sg_flags &= ~ECHO;
 265     (void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty);
 266
 267     for (p = string; c = *p; p++)
 268         (void) ioctl(SHOUT, TIOCSTI, (ioctl_t) & c);
 269     (void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty_normal);
 270 #endif /* TERMIO */
 271
 272     cleanup_until(&pintr_disabled);
 273 }
 274
 275 static int
 276 filetype(const Char *dir, const Char *file)
 277 {
 278     Char    *path;
 279     char *spath;
 280     struct stat statb;
 281
 282     path = Strspl(dir, file);
 283     spath = short2str(path);
 284     xfree(path);
 285     if (lstat(spath, &statb) == 0) {
 286         switch (statb.st_mode & S_IFMT) {
 287         case S_IFDIR:
 288             return ('/');
 289
 290         case S_IFLNK:
 291             if (stat(spath, &statb) == 0 &&     /* follow it out */
 292                 S_ISDIR(statb.st_mode))
 293                 return ('>');
 294             else
 295                 return ('@');
 296
 297         case S_IFSOCK:
 298             return ('=');
 299
 300         default:
 301             if (statb.st_mode & 0111)
 302                 return ('*');
 303         }
 304     }
 305     return (' ');
 306 }
 307
 308 /*
 309  * Print sorted down columns
 310  */
 311 static void
 312 print_by_column(const Char *dir, Char *items[], size_t count)
 313 {
 314     struct winsize win;
 315     size_t i;
 316     int rows, r, c, maxwidth = 0, columns;
 317
 318     if (ioctl(SHOUT, TIOCGWINSZ, (ioctl_t) & win) < 0 || win.ws_col == 0)
 319         win.ws_col = 80;
 320     for (i = 0; i < count; i++)
 321         maxwidth = maxwidth > (r = Strlen(items[i])) ? maxwidth : r;
 322     maxwidth += 2;              /* for the file tag and space */
 323     columns = win.ws_col / maxwidth;
 324     if (columns == 0)
 325         columns = 1;
 326     rows = (count + (columns - 1)) / columns;
 327     for (r = 0; r < rows; r++) {
 328         for (c = 0; c < columns; c++) {
 329             i = c * rows + r;
 330             if (i < count) {
 331                 int w;
 332
 333                 xprintf("%S", items[i]);
 334                 xputchar(dir ? filetype(dir, items[i]) : ' ');
 335                 if (c < columns - 1) {  /* last column? */
 336                     w = Strlen(items[i]) + 1;
 337                     for (; w < maxwidth; w++)
 338                         xputchar(' ');
 339                 }
 340             }
 341         }
 342         xputchar('\r');
 343         xputchar('\n');
 344     }
 345 }
 346
 347 /*
 348  * Expand file name with possible tilde usage
 349  *      ~person/mumble
 350  * expands to
 351  *      home_directory_of_person/mumble
 352  */
 353 static Char *
 354 tilde(const Char *old)
 355 {
 356     const Char *o, *home;
 357     struct passwd *pw;
 358
 359     if (old[0] != '~')
 360         return (Strsave(old));
 361     old++;
 362
 363     for (o = old; *o != '\0' && *o != '/'; o++)
 364         ;
 365     if (o == old)
 366         home = varval(STRhome);
 367     else {
 368         Char *person;
 369
 370         person = Strnsave(old, o - old);
 371         pw = xgetpwnam(short2str(person));
 372         xfree(person);
 373         if (pw == NULL)
 374             return (NULL);
 375         home = str2short(pw->pw_dir);
 376     }
 377     return Strspl(home, o);
 378 }
 379
 380 /*
 381  * Cause pending line to be printed
 382  */
 383 static void
 384 retype(void)
 385 {
 386 #ifdef TERMIO
 387 # ifdef POSIX
 388     struct termios tty;
 389
 390     (void) tcgetattr(SHOUT, &tty);
 391 # else
 392     struct termio tty;
 393
 394     (void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty);
 395 # endif /* POSIX */
 396
 397 #ifndef __QNXNTO__
 398     tty.c_lflag |= PENDIN;
 399 #endif
 400
 401 # ifdef POSIX
 402     (void) xtcsetattr(SHOUT, TCSANOW, &tty);
 403 # else
 404     (void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
 405 # endif /* POSIX */
 406 #else
 407     int     pending_input = LPENDIN;
 408
 409     (void) ioctl(SHOUT, TIOCLBIS, (ioctl_t) & pending_input);
 410 #endif /* TERMIO */
 411 }
 412
 413 static void
 414 beep(void)
 415 {
 416     if (adrof(STRnobeep) == 0)
 417 #ifdef IS_ASCII
 418         (void) xwrite(SHOUT, "\007", 1);
 419 #else
 420     {
 421         unsigned char beep_ch = CTL_ESC('\007');
 422         (void) xwrite(SHOUT, &beep_ch, 1);
 423     }
 424 #endif
 425 }
 426
 427 /*
 428  * Erase that silly ^[ and
 429  * print the recognized part of the string
 430  */
 431 static void
 432 print_recognized_stuff(const Char *recognized_part)
 433 {
 434     /* An optimized erasing of that silly ^[ */
 435     (void) putraw('\b');
 436     (void) putraw('\b');
 437     switch (Strlen(recognized_part)) {
 438
 439     case 0:                     /* erase two Characters: ^[ */
 440         (void) putraw(' ');
 441         (void) putraw(' ');
 442         (void) putraw('\b');
 443         (void) putraw('\b');
 444         break;
 445
 446     case 1:                     /* overstrike the ^, erase the [ */
 447         xprintf("%S", recognized_part);
 448         (void) putraw(' ');
 449         (void) putraw('\b');
 450         break;
 451
 452     default:                    /* overstrike both Characters ^[ */
 453         xprintf("%S", recognized_part);
 454         break;
 455     }
 456     flush();
 457 }
 458
 459 /*
 460  * Parse full path in file into 2 parts: directory and file names
 461  * Should leave final slash (/) at end of dir.
 462  */
 463 static void
 464 extract_dir_and_name(const Char *path, Char **dir, const Char **name)
 465 {
 466     const Char *p;
 467
 468     p = Strrchr(path, '/');
 469     if (p == NULL)
 470         p = path;
 471     else
 472         p++;
 473     *name = p;
 474     *dir = Strnsave(path, p - path);
 475 }
 476
 477 static Char *
 478 getitem(DIR *dir_fd, int looking_for_lognames)
 479 {
 480     struct passwd *pw;
 481     struct dirent *dirp;
 482
 483     if (looking_for_lognames) {
 484 #ifndef HAVE_GETPWENT
 485             return (NULL);
 486 #else
 487         if ((pw = getpwent()) == NULL)
 488             return (NULL);
 489         return (str2short(pw->pw_name));
 490 #endif /* atp vmsposix */
 491     }
 492     if ((dirp = readdir(dir_fd)) != NULL)
 493         return (str2short(dirp->d_name));
 494     return (NULL);
 495 }
 496
 497 /*
 498  * Perform a RECOGNIZE or LIST command on string "word".
 499  */
 500 static size_t
 501 tsearch(Char *word, COMMAND command, size_t max_word_length)
 502 {
 503     DIR *dir_fd;
 504     int ignoring = TRUE, nignored = 0;
 505     int looking_for_lognames;
 506     Char *tilded_dir = NULL, *dir = NULL;
 507     Char *extended_name = NULL;
 508     const Char *name;
 509     Char *item;
 510     struct blk_buf items = BLK_BUF_INIT;
 511     size_t name_length;
 512
 513     looking_for_lognames = (*word == '~') && (Strchr(word, '/') == NULL);
 514     if (looking_for_lognames) {
 515 #ifdef HAVE_GETPWENT
 516         (void) setpwent();
 517 #endif
 518         name = word + 1;        /* name sans ~ */
 519         dir_fd = NULL;
 520         cleanup_push(dir, xfree);
 521     }
 522     else {
 523         extract_dir_and_name(word, &dir, &name);
 524         cleanup_push(dir, xfree);
 525         tilded_dir = tilde(dir);
 526         if (tilded_dir == NULL)
 527             goto end;
 528         cleanup_push(tilded_dir, xfree);
 529         dir_fd = opendir(*tilded_dir ? short2str(tilded_dir) : ".");
 530         if (dir_fd == NULL)
 531             goto end;
 532     }
 533
 534     name_length = Strlen(name);
 535     cleanup_push(&extended_name, xfree_indirect);
 536     cleanup_push(&items, bb_cleanup);
 537 again:                          /* search for matches */
 538     while ((item = getitem(dir_fd, looking_for_lognames)) != NULL) {
 539         if (!is_prefix(name, item))
 540             continue;
 541         /* Don't match . files on null prefix match */
 542         if (name_length == 0 && item[0] == '.' &&
 543             !looking_for_lognames)
 544             continue;
 545         if (command == LIST)
 546             bb_append(&items, Strsave(item));
 547         else {                  /* RECOGNIZE command */
 548             if (ignoring && ignored(item))
 549                 nignored++;
 550             else if (recognize(&extended_name, item, name_length, ++items.len))
 551                 break;
 552         }
 553     }
 554     if (ignoring && items.len == 0 && nignored > 0) {
 555         ignoring = FALSE;
 556         nignored = 0;
 557         if (looking_for_lognames) {
 558 #ifdef HAVE_GETPWENT
 559             (void) setpwent();
 560 #endif /* atp vmsposix */
 561         } else
 562             rewinddir(dir_fd);
 563         goto again;
 564     }
 565
 566     if (looking_for_lognames) {
 567 #ifndef HAVE_GETPWENT
 568         (void) endpwent();
 569 #endif
 570     } else
 571         xclosedir(dir_fd);
 572     if (items.len != 0) {
 573         if (command == RECOGNIZE) {
 574             if (looking_for_lognames)
 575                 copyn(word, STRtilde, 2);/*FIXBUF, sort of */
 576             else
 577                 /* put back dir part */
 578                 copyn(word, dir, max_word_length);/*FIXBUF*/
 579             /* add extended name */
 580             catn(word, extended_name, max_word_length);/*FIXBUF*/
 581         }
 582         else {                  /* LIST */
 583             qsort(items.vec, items.len, sizeof(items.vec[0]), compare);
 584             print_by_column(looking_for_lognames ? NULL : tilded_dir,
 585                             items.vec, items.len);
 586         }
 587     }
 588  end:
 589     cleanup_until(dir);
 590     return items.len;
 591 }
 592
 593
 594 static int
 595 compare(const void *p, const void *q)
 596 {
 597 #if defined (WIDE_STRINGS) && !defined (UTF16_STRING)
 598     errno = 0;
 599
 600     return (wcscoll(*(Char *const *) p, *(Char *const *) q));
 601 #else
 602     char *p1, *q1;
 603     int res;
 604
 605     p1 = strsave(short2str(*(Char *const *) p));
 606     q1 = strsave(short2str(*(Char *const *) q));
 607 # if defined(NLS) && defined(HAVE_STRCOLL)
 608     res = strcoll(p1, q1);
 609 # else
 610     res = strcmp(p1, q1);
 611 # endif /* NLS && HAVE_STRCOLL */
 612     xfree (p1);
 613     xfree (q1);
 614     return res;
 615 #endif /* not WIDE_STRINGS */
 616 }
 617
 618 /*
 619  * Object: extend what user typed up to an ambiguity.
 620  * Algorithm:
 621  * On first match, copy full item (assume it'll be the only match)
 622  * On subsequent matches, shorten extended_name to the first
 623  * Character mismatch between extended_name and item.
 624  * If we shorten it back to the prefix length, stop searching.
 625  */
 626 static int
 627 recognize(Char **extended_name, Char *item, size_t name_length,
 628           size_t numitems)
 629 {
 630     if (numitems == 1)          /* 1st match */
 631         *extended_name = Strsave(item);
 632     else {                      /* 2nd & subsequent matches */
 633         Char *x, *ent;
 634         size_t len = 0;
 635
 636         x = *extended_name;
 637         for (ent = item; *x && *x == *ent++; x++, len++);
 638         *x = '\0';              /* Shorten at 1st Char diff */
 639         if (len == name_length) /* Ambiguous to prefix? */
 640             return (-1);        /* So stop now and save time */
 641     }
 642     return (0);
 643 }
 644
 645 /*
 646  * Return true if check matches initial Chars in template.
 647  * This differs from PWB imatch in that if check is null
 648  * it matches anything.
 649  */
 650 static int
 651 is_prefix(const Char *check, const Char *template)
 652 {
 653     do
 654         if (*check == 0)
 655             return (TRUE);
 656     while (*check++ == *template++);
 657     return (FALSE);
 658 }
 659
 660 /*
 661  *  Return true if the Chars in template appear at the
 662  *  end of check, I.e., are it's suffix.
 663  */
 664 static int
 665 is_suffix(const Char *check, const Char *template)
 666 {
 667     const Char *c, *t;
 668
 669     for (c = check; *c++;);
 670     for (t = template; *t++;);
 671     for (;;) {
 672         if (t == template)
 673             return 1;
 674         if (c == check || *--t != *--c)
 675             return 0;
 676     }
 677 }
 678
 679 static void
 680 setup_tty_cleanup(void *dummy)
 681 {
 682     USE(dummy);
 683     setup_tty(OFF);
 684 }
 685
 686 size_t
 687 tenex(Char *inputline, size_t inputline_size)
 688 {
 689     size_t numitems;
 690     ssize_t num_read;
 691     char    tinputline[BUFSIZE + 1];/*FIXBUF*/
 692
 693     setup_tty(ON);
 694     cleanup_push(&num_read, setup_tty_cleanup); /* num_read is only a marker */
 695
 696     while ((num_read = xread(SHIN, tinputline, BUFSIZE)) > 0) {/*FIXBUF*/
 697         static const Char delims[] = {' ', '\'', '"', '\t', ';', '&', '<',
 698         '>', '(', ')', '|', '^', '%', '\0'};
 699         Char *str_end, *word_start, last_Char, should_retype;
 700         size_t space_left;
 701         COMMAND command;
 702
 703         tinputline[num_read] = 0;
 704         Strcpy(inputline, str2short(tinputline));/*FIXBUF*/
 705         num_read = Strlen(inputline);
 706         last_Char = CTL_ESC(ASC(inputline[num_read - 1]) & ASCII);
 707
 708         if (last_Char == '\n' || (size_t)num_read == inputline_size)
 709             break;
 710         command = (last_Char == ESC) ? RECOGNIZE : LIST;
 711         if (command == LIST)
 712             xputchar('\n');
 713         str_end = &inputline[num_read];
 714         if (last_Char == ESC)
 715             --str_end;          /* wipeout trailing cmd Char */
 716         *str_end = '\0';
 717         /*
 718          * Find LAST occurence of a delimiter in the inputline. The word start
 719          * is one Character past it.
 720          */
 721         for (word_start = str_end; word_start > inputline; --word_start)
 722             if (Strchr(delims, word_start[-1]))
 723                 break;
 724         space_left = inputline_size - (word_start - inputline) - 1;
 725         numitems = tsearch(word_start, command, space_left);
 726
 727         if (command == RECOGNIZE) {
 728             /* print from str_end on */
 729             print_recognized_stuff(str_end);
 730             if (numitems != 1)  /* Beep = No match/ambiguous */
 731                 beep();
 732         }
 733
 734         /*
 735          * Tabs in the input line cause trouble after a pushback. tty driver
 736          * won't backspace over them because column positions are now
 737          * incorrect. This is solved by retyping over current line.
 738          */
 739         should_retype = FALSE;
 740         if (Strchr(inputline, '\t')) {  /* tab Char in input line? */
 741             back_to_col_1();
 742             should_retype = TRUE;
 743         }
 744         if (command == LIST)    /* Always retype after a LIST */
 745             should_retype = TRUE;
 746         if (should_retype)
 747             printprompt(0, NULL);
 748         pushback(inputline);
 749         if (should_retype)
 750             retype();
 751     }
 752     cleanup_until(&num_read);
 753     return (num_read);
 754 }
 755
 756 static int
 757 ignored(const Char *item)
 758 {
 759     struct varent *vp;
 760     Char **cp;
 761
 762     if ((vp = adrof(STRfignore)) == NULL || (cp = vp->vec) == NULL)
 763         return (FALSE);
 764     for (; *cp != NULL; cp++)
 765         if (is_suffix(item, *cp))
 766             return (TRUE);
 767     return (FALSE);
 768 }
 769 #endif  /* FILEC && TIOCSTI */