1 /* $NetBSD: edit.c,v 1.17 2005/09/11 22:23:42 christos Exp $ */ 2 3 /* 4 * Command line editing - common code 5 * 6 */ 7 #include <sys/cdefs.h> 8 9 #ifndef lint 10 __RCSID("$NetBSD: edit.c,v 1.17 2005/09/11 22:23:42 christos Exp $"); 11 #endif 12 13 14 #include "config.h" 15 #ifdef EDIT 16 17 #include "sh.h" 18 #include "tty.h" 19 #define EXTERN 20 #include "edit.h" 21 #undef EXTERN 22 #ifdef OS_SCO /* SCO Unix 3.2v4.1 */ 23 # include <sys/stream.h> /* needed for <sys/ptem.h> */ 24 # include <sys/ptem.h> /* needed for struct winsize */ 25 #endif /* OS_SCO */ 26 #include <sys/ioctl.h> 27 #include <ctype.h> 28 #include "ksh_stat.h" 29 30 31 #if defined(TIOCGWINSZ) 32 static RETSIGTYPE x_sigwinch ARGS((int sig)); 33 static int got_sigwinch; 34 static void check_sigwinch ARGS((void)); 35 #endif /* TIOCGWINSZ */ 36 37 static int x_file_glob ARGS((int flags, const char *str, int slen, 38 char ***wordsp)); 39 static int x_command_glob ARGS((int flags, const char *str, int slen, 40 char ***wordsp)); 41 static int x_locate_word ARGS((const char *buf, int buflen, int pos, 42 int *startp, int *is_command)); 43 44 static char vdisable_c; 45 46 47 /* Called from main */ 48 void 49 x_init() 50 { 51 /* set to -2 to force initial binding */ 52 edchars.erase = edchars.kill = edchars.intr = edchars.quit 53 = edchars.eof = -2; 54 /* default value for deficient systems */ 55 edchars.werase = 027; /* ^W */ 56 57 #ifdef TIOCGWINSZ 58 # ifdef SIGWINCH 59 if (setsig(&sigtraps[SIGWINCH], x_sigwinch, SS_RESTORE_ORIG|SS_SHTRAP)) 60 sigtraps[SIGWINCH].flags |= TF_SHELL_USES; 61 # endif /* SIGWINCH */ 62 got_sigwinch = 1; /* force initial check */ 63 check_sigwinch(); 64 #endif /* TIOCGWINSZ */ 65 66 #ifdef EMACS 67 x_init_emacs(); 68 #endif /* EMACS */ 69 70 /* Bizarreness to figure out how to disable 71 * a struct termios.c_cc[] char 72 */ 73 #ifdef _POSIX_VDISABLE 74 if (_POSIX_VDISABLE >= 0) 75 vdisable_c = (char) _POSIX_VDISABLE; 76 else 77 /* `feature not available' */ 78 vdisable_c = (char) 0377; 79 #else 80 # if defined(HAVE_PATHCONF) && defined(_PC_VDISABLE) 81 vdisable_c = fpathconf(tty_fd, _PC_VDISABLE); 82 # else 83 vdisable_c = (char) 0377; /* default to old BSD value */ 84 # endif 85 #endif /* _POSIX_VDISABLE */ 86 } 87 88 #if defined(TIOCGWINSZ) 89 static RETSIGTYPE 90 x_sigwinch(sig) 91 int sig; 92 { 93 got_sigwinch = 1; 94 return RETSIGVAL; 95 } 96 97 static void 98 check_sigwinch ARGS((void)) 99 { 100 if (got_sigwinch) { 101 struct winsize ws; 102 103 got_sigwinch = 0; 104 if (procpid == kshpid && ioctl(tty_fd, TIOCGWINSZ, &ws) >= 0) { 105 struct tbl *vp; 106 107 /* Do NOT export COLUMNS/LINES. Many applications 108 * check COLUMNS/LINES before checking ws.ws_col/row, 109 * so if the app is started with C/L in the environ 110 * and the window is then resized, the app won't 111 * see the change cause the environ doesn't change. 112 */ 113 if (ws.ws_col) { 114 x_cols = ws.ws_col < MIN_COLS ? MIN_COLS 115 : ws.ws_col; 116 117 if ((vp = typeset("COLUMNS", 0, 0, 0, 0))) 118 setint(vp, (long) ws.ws_col); 119 } 120 if (ws.ws_row 121 && (vp = typeset("LINES", 0, 0, 0, 0))) 122 setint(vp, (long) ws.ws_row); 123 } 124 } 125 } 126 #endif /* TIOCGWINSZ */ 127 128 /* 129 * read an edited command line 130 */ 131 int 132 x_read(buf, len) 133 char *buf; 134 size_t len; 135 { 136 int i; 137 138 x_mode(TRUE); 139 #ifdef EMACS 140 if (Flag(FEMACS) || Flag(FGMACS)) 141 i = x_emacs(buf, len); 142 else 143 #endif 144 #ifdef VI 145 if (Flag(FVI)) 146 i = x_vi(buf, len); 147 else 148 #endif 149 i = -1; /* internal error */ 150 x_mode(FALSE); 151 #if defined(TIOCGWINSZ) 152 if (got_sigwinch) 153 check_sigwinch(); 154 #endif /* TIOCGWINSZ */ 155 156 return i; 157 } 158 159 /* tty I/O */ 160 161 int 162 x_getc() 163 { 164 #ifdef OS2 165 unsigned char c = _read_kbd(0, 1, 0); 166 return c == 0 ? 0xE0 : c; 167 #else /* OS2 */ 168 char c; 169 int n; 170 171 while ((n = blocking_read(0, &c, 1)) < 0 && errno == EINTR) 172 if (trap) { 173 x_mode(FALSE); 174 runtraps(0); 175 x_mode(TRUE); 176 } 177 if (n != 1) 178 return -1; 179 return (int) (unsigned char) c; 180 #endif /* OS2 */ 181 } 182 183 void 184 x_flush() 185 { 186 shf_flush(shl_out); 187 } 188 189 void 190 x_putc(c) 191 int c; 192 { 193 shf_putc(c, shl_out); 194 } 195 196 void 197 x_puts(s) 198 const char *s; 199 { 200 while (*s != 0) 201 shf_putc(*s++, shl_out); 202 } 203 204 bool_t 205 x_mode(onoff) 206 bool_t onoff; 207 { 208 static bool_t x_cur_mode; 209 bool_t prev; 210 211 if (x_cur_mode == onoff) 212 return x_cur_mode; 213 prev = x_cur_mode; 214 x_cur_mode = onoff; 215 216 if (onoff) { 217 TTY_state cb; 218 X_chars oldchars; 219 220 oldchars = edchars; 221 cb = tty_state; 222 223 #if defined(HAVE_TERMIOS_H) || defined(HAVE_TERMIO_H) 224 edchars.erase = cb.c_cc[VERASE]; 225 edchars.kill = cb.c_cc[VKILL]; 226 edchars.intr = cb.c_cc[VINTR]; 227 edchars.quit = cb.c_cc[VQUIT]; 228 edchars.eof = cb.c_cc[VEOF]; 229 # ifdef VWERASE 230 edchars.werase = cb.c_cc[VWERASE]; 231 # endif 232 # ifdef _CRAY2 /* brain-damaged terminal handler */ 233 cb.c_lflag &= ~(ICANON|ECHO); 234 /* rely on print routine to map '\n' to CR,LF */ 235 # else 236 cb.c_iflag &= ~(INLCR|ICRNL); 237 # ifdef _BSD_SYSV /* need to force CBREAK instead of RAW (need CRMOD on output) */ 238 cb.c_lflag &= ~(ICANON|ECHO); 239 # else 240 # ifdef SWTCH /* need CBREAK to handle swtch char */ 241 cb.c_lflag &= ~(ICANON|ECHO); 242 cb.c_lflag |= ISIG; 243 cb.c_cc[VINTR] = vdisable_c; 244 cb.c_cc[VQUIT] = vdisable_c; 245 # else 246 cb.c_lflag &= ~(ISIG|ICANON|ECHO); 247 # endif 248 # endif 249 # ifdef VLNEXT 250 /* osf/1 processes lnext when ~icanon */ 251 cb.c_cc[VLNEXT] = vdisable_c; 252 # endif /* VLNEXT */ 253 # ifdef VDISCARD 254 /* sunos 4.1.x & osf/1 processes discard(flush) when ~icanon */ 255 cb.c_cc[VDISCARD] = vdisable_c; 256 # endif /* VDISCARD */ 257 cb.c_cc[VTIME] = 0; 258 cb.c_cc[VMIN] = 1; 259 # endif /* _CRAY2 */ 260 #else 261 /* Assume BSD tty stuff. */ 262 edchars.erase = cb.sgttyb.sg_erase; 263 edchars.kill = cb.sgttyb.sg_kill; 264 cb.sgttyb.sg_flags &= ~ECHO; 265 cb.sgttyb.sg_flags |= CBREAK; 266 # ifdef TIOCGATC 267 edchars.intr = cb.lchars.tc_intrc; 268 edchars.quit = cb.lchars.tc_quitc; 269 edchars.eof = cb.lchars.tc_eofc; 270 edchars.werase = cb.lchars.tc_werasc; 271 cb.lchars.tc_suspc = -1; 272 cb.lchars.tc_dsuspc = -1; 273 cb.lchars.tc_lnextc = -1; 274 cb.lchars.tc_statc = -1; 275 cb.lchars.tc_intrc = -1; 276 cb.lchars.tc_quitc = -1; 277 cb.lchars.tc_rprntc = -1; 278 # else 279 edchars.intr = cb.tchars.t_intrc; 280 edchars.quit = cb.tchars.t_quitc; 281 edchars.eof = cb.tchars.t_eofc; 282 cb.tchars.t_intrc = -1; 283 cb.tchars.t_quitc = -1; 284 # ifdef TIOCGLTC 285 edchars.werase = cb.ltchars.t_werasc; 286 cb.ltchars.t_suspc = -1; 287 cb.ltchars.t_dsuspc = -1; 288 cb.ltchars.t_lnextc = -1; 289 cb.ltchars.t_rprntc = -1; 290 # endif 291 # endif /* TIOCGATC */ 292 #endif /* HAVE_TERMIOS_H || HAVE_TERMIO_H */ 293 294 set_tty(tty_fd, &cb, TF_WAIT); 295 296 #ifdef __CYGWIN__ 297 if (edchars.eof == '\0') 298 edchars.eof = '\4'; 299 #endif /* __CYGWIN__ */ 300 301 /* Convert unset values to internal `unset' value */ 302 if (edchars.erase == vdisable_c) 303 edchars.erase = -1; 304 if (edchars.kill == vdisable_c) 305 edchars.kill = -1; 306 if (edchars.intr == vdisable_c) 307 edchars.intr = -1; 308 if (edchars.quit == vdisable_c) 309 edchars.quit = -1; 310 if (edchars.eof == vdisable_c) 311 edchars.eof = -1; 312 if (edchars.werase == vdisable_c) 313 edchars.werase = -1; 314 if (memcmp(&edchars, &oldchars, sizeof(edchars)) != 0) { 315 #ifdef EMACS 316 x_emacs_keys(&edchars); 317 #endif 318 } 319 } else { 320 /* TF_WAIT doesn't seem to be necessary when leaving xmode */ 321 set_tty(tty_fd, &tty_state, TF_NONE); 322 } 323 324 return prev; 325 } 326 327 /* NAME: 328 * promptlen - calculate the length of PS1 etc. 329 * 330 * DESCRIPTION: 331 * This function is based on a fix from guy@demon.co.uk 332 * It fixes a bug in that if PS1 contains '!', the length 333 * given by strlen() is probably wrong. 334 * 335 * RETURN VALUE: 336 * length 337 */ 338 int 339 promptlen(cp, spp) 340 const char *cp; 341 const char **spp; 342 { 343 int count = 0; 344 const char *sp = cp; 345 char delimiter = 0; 346 int indelimit = 0; 347 348 /* Undocumented AT&T ksh feature: 349 * If the second char in the prompt string is \r then the first char 350 * is taken to be a non-printing delimiter and any chars between two 351 * instances of the delimiter are not considered to be part of the 352 * prompt length 353 */ 354 if (*cp && cp[1] == '\r') { 355 delimiter = *cp; 356 cp += 2; 357 } 358 359 for (; *cp; cp++) { 360 if (indelimit && *cp != delimiter) 361 ; 362 else if (*cp == '\n' || *cp == '\r') { 363 count = 0; 364 sp = cp + 1; 365 } else if (*cp == '\t') { 366 count = (count | 7) + 1; 367 } else if (*cp == '\b') { 368 if (count > 0) 369 count--; 370 } else if (*cp == delimiter) 371 indelimit = !indelimit; 372 else 373 count++; 374 } 375 if (spp) 376 *spp = sp; 377 return count; 378 } 379 380 void 381 set_editmode(ed) 382 const char *ed; 383 { 384 static const enum sh_flag edit_flags[] = { 385 #ifdef EMACS 386 FEMACS, FGMACS, 387 #endif 388 #ifdef VI 389 FVI, 390 #endif 391 }; 392 char *rcp; 393 int i; 394 395 if ((rcp = ksh_strrchr_dirsep(ed))) 396 ed = ++rcp; 397 for (i = 0; i < NELEM(edit_flags); i++) 398 if (strstr(ed, goptions[(int) edit_flags[i]].name)) { 399 change_flag(edit_flags[i], OF_SPECIAL, 1); 400 return; 401 } 402 } 403 404 /* ------------------------------------------------------------------------- */ 405 /* Misc common code for vi/emacs */ 406 407 /* Handle the commenting/uncommenting of a line. 408 * Returns: 409 * 1 if a carriage return is indicated (comment added) 410 * 0 if no return (comment removed) 411 * -1 if there is an error (not enough room for comment chars) 412 * If successful, *lenp contains the new length. Note: cursor should be 413 * moved to the start of the line after (un)commenting. 414 */ 415 int 416 x_do_comment(buf, bsize, lenp) 417 char *buf; 418 int bsize; 419 int *lenp; 420 { 421 int i, j; 422 int len = *lenp; 423 424 if (len == 0) 425 return 1; /* somewhat arbitrary - it's what at&t ksh does */ 426 427 /* Already commented? */ 428 if (buf[0] == '#') { 429 int saw_nl = 0; 430 431 for (j = 0, i = 1; i < len; i++) { 432 if (!saw_nl || buf[i] != '#') 433 buf[j++] = buf[i]; 434 saw_nl = buf[i] == '\n'; 435 } 436 *lenp = j; 437 return 0; 438 } else { 439 int n = 1; 440 441 /* See if there's room for the #'s - 1 per \n */ 442 for (i = 0; i < len; i++) 443 if (buf[i] == '\n') 444 n++; 445 if (len + n >= bsize) 446 return -1; 447 /* Now add them... */ 448 for (i = len, j = len + n; --i >= 0; ) { 449 if (buf[i] == '\n') 450 buf[--j] = '#'; 451 buf[--j] = buf[i]; 452 } 453 buf[0] = '#'; 454 *lenp += n; 455 return 1; 456 } 457 } 458 459 /* ------------------------------------------------------------------------- */ 460 /* Common file/command completion code for vi/emacs */ 461 462 463 static char *add_glob ARGS((const char *, int)); 464 static void glob_table ARGS((const char *, XPtrV *, struct table *)); 465 static void glob_path ARGS((int, const char *, XPtrV *, const char *)); 466 467 #if 0 /* not used... */ 468 int x_complete_word ARGS((const char *, int, int, int *, char **)); 469 int 470 x_complete_word(str, slen, is_command, nwordsp, ret) 471 const char *str; 472 int slen; 473 int is_command; 474 int *nwordsp; 475 char **ret; 476 { 477 int nwords; 478 int prefix_len; 479 char **words; 480 481 nwords = (is_command ? x_command_glob : x_file_glob)(XCF_FULLPATH, 482 str, slen, &words); 483 *nwordsp = nwords; 484 if (nwords == 0) { 485 *ret = (char *) 0; 486 return -1; 487 } 488 489 prefix_len = x_longest_prefix(nwords, words); 490 *ret = str_nsave(words[0], prefix_len, ATEMP); 491 x_free_words(nwords, words); 492 return prefix_len; 493 } 494 #endif /* 0 */ 495 496 void 497 x_print_expansions(nwords, words, is_command) 498 int nwords; 499 char *const *words; 500 int is_command; 501 { 502 int use_copy = 0; 503 int prefix_len; 504 XPtrV l; 505 506 /* Check if all matches are in the same directory (in this 507 * case, we want to omit the directory name) 508 */ 509 if (!is_command 510 && (prefix_len = x_longest_prefix(nwords, words)) > 0) 511 { 512 int i; 513 514 /* Special case for 1 match (prefix is whole word) */ 515 if (nwords == 1) 516 prefix_len = x_basename(words[0], (char *) 0); 517 /* Any (non-trailing) slashes in non-common word suffixes? */ 518 for (i = 0; i < nwords; i++) 519 if (x_basename(words[i] + prefix_len, (char *) 0) 520 > prefix_len) 521 break; 522 /* All in same directory? */ 523 if (i == nwords) { 524 while (prefix_len > 0 525 && !ISDIRSEP(words[0][prefix_len - 1])) 526 prefix_len--; 527 use_copy = 1; 528 XPinit(l, nwords + 1); 529 for (i = 0; i < nwords; i++) 530 XPput(l, words[i] + prefix_len); 531 XPput(l, (char *) 0); 532 } 533 } 534 535 /* 536 * Enumerate expansions 537 */ 538 x_putc('\r'); 539 x_putc('\n'); 540 pr_list(use_copy ? (char **) XPptrv(l) : words); 541 542 if (use_copy) 543 XPfree(l); /* not x_free_words() */ 544 } 545 546 /* 547 * Do file globbing: 548 * - appends * to (copy of) str if no globbing chars found 549 * - does expansion, checks for no match, etc. 550 * - sets *wordsp to array of matching strings 551 * - returns number of matching strings 552 */ 553 static int 554 x_file_glob(flags, str, slen, wordsp) 555 int flags; 556 const char *str; 557 int slen; 558 char ***wordsp; 559 { 560 char *toglob; 561 char **words; 562 int nwords, i, idx, escaping; 563 XPtrV w; 564 struct source *s, *sold; 565 566 if (slen < 0) 567 return 0; 568 569 toglob = add_glob(str, slen); 570 571 /* remove all escaping backward slashes */ 572 escaping = 0; 573 for(i = 0, idx = 0; toglob[i]; i++) { 574 if (toglob[i] == '\\' && !escaping) { 575 escaping = 1; 576 continue; 577 } 578 579 toglob[idx] = toglob[i]; 580 idx++; 581 if (escaping) escaping = 0; 582 } 583 toglob[idx] = '\0'; 584 585 /* 586 * Convert "foo*" (toglob) to an array of strings (words) 587 */ 588 sold = source; 589 s = pushs(SWSTR, ATEMP); 590 s->start = s->str = toglob; 591 source = s; 592 if (yylex(ONEWORD) != LWORD) { 593 source = sold; 594 internal_errorf(0, "fileglob: substitute error"); 595 return 0; 596 } 597 source = sold; 598 XPinit(w, 32); 599 expand(yylval.cp, &w, DOGLOB|DOTILDE|DOMARKDIRS); 600 XPput(w, NULL); 601 words = (char **) XPclose(w); 602 603 for (nwords = 0; words[nwords]; nwords++) 604 ; 605 if (nwords == 1) { 606 struct stat statb; 607 608 /* Check if globbing failed (returned glob pattern), 609 * but be careful (E.g. toglob == "ab*" when the file 610 * "ab*" exists is not an error). 611 * Also, check for empty result - happens if we tried 612 * to glob something which evaluated to an empty 613 * string (e.g., "$FOO" when there is no FOO, etc). 614 */ 615 if ((strcmp(words[0], toglob) == 0 616 && stat(words[0], &statb) < 0) 617 || words[0][0] == '\0') 618 { 619 x_free_words(nwords, words); 620 nwords = 0; 621 } 622 } 623 afree(toglob, ATEMP); 624 625 *wordsp = nwords ? words : (char **) 0; 626 627 return nwords; 628 } 629 630 /* Data structure used in x_command_glob() */ 631 struct path_order_info { 632 char *word; 633 int base; 634 int path_order; 635 }; 636 637 static int path_order_cmp(const void *aa, const void *bb); 638 639 /* Compare routine used in x_command_glob() */ 640 static int 641 path_order_cmp(aa, bb) 642 const void *aa; 643 const void *bb; 644 { 645 const struct path_order_info *a = (const struct path_order_info *) aa; 646 const struct path_order_info *b = (const struct path_order_info *) bb; 647 int t; 648 649 t = FILECMP(a->word + a->base, b->word + b->base); 650 return t ? t : a->path_order - b->path_order; 651 } 652 653 static int 654 x_command_glob(flags, str, slen, wordsp) 655 int flags; 656 const char *str; 657 int slen; 658 char ***wordsp; 659 { 660 char *toglob; 661 char *pat; 662 char *fpath; 663 int nwords; 664 XPtrV w; 665 struct block *l; 666 667 if (slen < 0) 668 return 0; 669 670 toglob = add_glob(str, slen); 671 672 /* Convert "foo*" (toglob) to a pattern for future use */ 673 pat = evalstr(toglob, DOPAT|DOTILDE); 674 afree(toglob, ATEMP); 675 676 XPinit(w, 32); 677 678 glob_table(pat, &w, &keywords); 679 glob_table(pat, &w, &aliases); 680 glob_table(pat, &w, &builtins); 681 for (l = e->loc; l; l = l->next) 682 glob_table(pat, &w, &l->funs); 683 684 glob_path(flags, pat, &w, path); 685 if ((fpath = str_val(global("FPATH"))) != null) 686 glob_path(flags, pat, &w, fpath); 687 688 nwords = XPsize(w); 689 690 if (!nwords) { 691 *wordsp = (char **) 0; 692 XPfree(w); 693 return 0; 694 } 695 696 /* Sort entries */ 697 if (flags & XCF_FULLPATH) { 698 /* Sort by basename, then path order */ 699 struct path_order_info *info; 700 struct path_order_info *last_info = 0; 701 char **words = (char **) XPptrv(w); 702 int path_order = 0; 703 int i; 704 705 info = (struct path_order_info *) 706 alloc(sizeof(struct path_order_info) * nwords, ATEMP); 707 for (i = 0; i < nwords; i++) { 708 info[i].word = words[i]; 709 info[i].base = x_basename(words[i], (char *) 0); 710 if (!last_info || info[i].base != last_info->base 711 || FILENCMP(words[i], 712 last_info->word, info[i].base) != 0) 713 { 714 last_info = &info[i]; 715 path_order++; 716 } 717 info[i].path_order = path_order; 718 } 719 qsort(info, nwords, sizeof(struct path_order_info), 720 path_order_cmp); 721 for (i = 0; i < nwords; i++) 722 words[i] = info[i].word; 723 afree((void *) info, ATEMP); 724 } else { 725 /* Sort and remove duplicate entries */ 726 char **words = (char **) XPptrv(w); 727 int i, j; 728 729 qsortp(XPptrv(w), (size_t) nwords, xstrcmp); 730 731 for (i = j = 0; i < nwords - 1; i++) { 732 if (strcmp(words[i], words[i + 1])) 733 words[j++] = words[i]; 734 else 735 afree(words[i], ATEMP); 736 } 737 words[j++] = words[i]; 738 nwords = j; 739 w.cur = (void **) &words[j]; 740 } 741 742 XPput(w, NULL); 743 *wordsp = (char **) XPclose(w); 744 745 return nwords; 746 } 747 748 #define IS_WORDC(c) !( ctype(c, C_LEX1) || (c) == '\'' || (c) == '"' \ 749 || (c) == '`' || (c) == '=' || (c) == ':' ) 750 751 static int 752 x_locate_word(buf, buflen, pos, startp, is_commandp) 753 const char *buf; 754 int buflen; 755 int pos; 756 int *startp; 757 int *is_commandp; 758 { 759 int p; 760 int start, end; 761 762 /* Bad call? Probably should report error */ 763 if (pos < 0 || pos > buflen) { 764 *startp = pos; 765 *is_commandp = 0; 766 return 0; 767 } 768 /* The case where pos == buflen happens to take care of itself... */ 769 770 start = pos; 771 /* Keep going backwards to start of word (has effect of allowing 772 * one blank after the end of a word) 773 */ 774 for (; (start > 0 && IS_WORDC(buf[start - 1])) 775 || (start > 1 && buf[start-2] == '\\'); start--) 776 ; 777 /* Go forwards to end of word */ 778 for (end = start; end < buflen && IS_WORDC(buf[end]); end++) { 779 if (buf[end] == '\\' && (end+1) < buflen) 780 end++; 781 } 782 783 if (is_commandp) { 784 int iscmd; 785 786 /* Figure out if this is a command */ 787 for (p = start - 1; p >= 0 && isspace((unsigned char)buf[p]); p--) 788 ; 789 iscmd = p < 0 || strchr(";|&()`", buf[p]); 790 if (iscmd) { 791 /* If command has a /, path, etc. is not searched; 792 * only current directory is searched, which is just 793 * like file globbing. 794 */ 795 for (p = start; p < end; p++) 796 if (ISDIRSEP(buf[p])) 797 break; 798 iscmd = p == end; 799 } 800 *is_commandp = iscmd; 801 } 802 803 *startp = start; 804 805 return end - start; 806 } 807 808 int 809 x_cf_glob(flags, buf, buflen, pos, startp, endp, wordsp, is_commandp) 810 int flags; 811 const char *buf; 812 int buflen; 813 int pos; 814 int *startp; 815 int *endp; 816 char ***wordsp; 817 int *is_commandp; 818 { 819 int len; 820 int nwords; 821 char **words; 822 int is_command; 823 824 len = x_locate_word(buf, buflen, pos, startp, &is_command); 825 if (!(flags & XCF_COMMAND)) 826 is_command = 0; 827 /* Don't do command globing on zero length strings - it takes too 828 * long and isn't very useful. File globs are more likely to be 829 * useful, so allow these. 830 */ 831 if (len == 0 && is_command) 832 return 0; 833 834 nwords = (is_command ? x_command_glob : x_file_glob)(flags, 835 buf + *startp, len, &words); 836 if (nwords == 0) { 837 *wordsp = (char **) 0; 838 return 0; 839 } 840 841 if (is_commandp) 842 *is_commandp = is_command; 843 *wordsp = words; 844 *endp = *startp + len; 845 846 return nwords; 847 } 848 849 /* Given a string, copy it and possibly add a '*' to the end. The 850 * new string is returned. 851 */ 852 static char * 853 add_glob(str, slen) 854 const char *str; 855 int slen; 856 { 857 char *toglob; 858 char *s; 859 bool_t saw_slash = FALSE; 860 861 if (slen < 0) 862 return (char *) 0; 863 864 toglob = str_nsave(str, slen + 1, ATEMP); /* + 1 for "*" */ 865 toglob[slen] = '\0'; 866 867 /* 868 * If the pathname contains a wildcard (an unquoted '*', 869 * '?', or '[') or parameter expansion ('$'), or a ~username 870 * with no trailing slash, then it is globbed based on that 871 * value (i.e., without the appended '*'). 872 */ 873 for (s = toglob; *s; s++) { 874 if (*s == '\\' && s[1]) 875 s++; 876 else if (*s == '*' || *s == '[' || *s == '?' || *s == '$' 877 || (s[1] == '(' /*)*/ && strchr("*+?@!", *s))) 878 break; 879 else if (ISDIRSEP(*s)) 880 saw_slash = TRUE; 881 } 882 if (!*s && (*toglob != '~' || saw_slash)) { 883 toglob[slen] = '*'; 884 toglob[slen + 1] = '\0'; 885 } 886 887 return toglob; 888 } 889 890 /* 891 * Find longest common prefix 892 */ 893 int 894 x_longest_prefix(nwords, words) 895 int nwords; 896 char *const *words; 897 { 898 int i, j; 899 int prefix_len; 900 char *p; 901 902 if (nwords <= 0) 903 return 0; 904 905 prefix_len = strlen(words[0]); 906 for (i = 1; i < nwords; i++) 907 for (j = 0, p = words[i]; j < prefix_len; j++) 908 if (FILECHCONV((unsigned char)p[j]) 909 != FILECHCONV((unsigned char)words[0][j])) { 910 prefix_len = j; 911 break; 912 } 913 return prefix_len; 914 } 915 916 void 917 x_free_words(nwords, words) 918 int nwords; 919 char **words; 920 { 921 int i; 922 923 for (i = 0; i < nwords; i++) 924 if (words[i]) 925 afree(words[i], ATEMP); 926 afree(words, ATEMP); 927 } 928 929 /* Return the offset of the basename of string s (which ends at se - need not 930 * be null terminated). Trailing slashes are ignored. If s is just a slash, 931 * then the offset is 0 (actually, length - 1). 932 * s Return 933 * /etc 1 934 * /etc/ 1 935 * /etc// 1 936 * /etc/fo 5 937 * foo 0 938 * /// 2 939 * 0 940 */ 941 int 942 x_basename(s, se) 943 const char *s; 944 const char *se; 945 { 946 const char *p; 947 948 if (se == (char *) 0) 949 se = s + strlen(s); 950 if (s == se) 951 return 0; 952 953 /* Skip trailing slashes */ 954 for (p = se - 1; p > s && ISDIRSEP(*p); p--) 955 ; 956 for (; p > s && !ISDIRSEP(*p); p--) 957 ; 958 if (ISDIRSEP(*p) && p + 1 < se) 959 p++; 960 961 return p - s; 962 } 963 964 /* 965 * Apply pattern matching to a table: all table entries that match a pattern 966 * are added to wp. 967 */ 968 static void 969 glob_table(pat, wp, tp) 970 const char *pat; 971 XPtrV *wp; 972 struct table *tp; 973 { 974 struct tstate ts; 975 struct tbl *te; 976 977 for (twalk(&ts, tp); (te = tnext(&ts)); ) { 978 if (gmatch(te->name, pat, FALSE)) 979 XPput(*wp, str_save(te->name, ATEMP)); 980 } 981 } 982 983 static void 984 glob_path(flags, pat, wp, xpath) 985 int flags; 986 const char *pat; 987 XPtrV *wp; 988 const char *xpath; 989 { 990 const char *sp, *p; 991 char *xp; 992 int staterr; 993 int pathlen; 994 int patlen; 995 int oldsize, newsize, i, j; 996 char **words; 997 XString xs; 998 999 patlen = strlen(pat) + 1; 1000 sp = xpath; 1001 Xinit(xs, xp, patlen + 128, ATEMP); 1002 while (sp) { 1003 xp = Xstring(xs, xp); 1004 if (!(p = strchr(sp, PATHSEP))) 1005 p = sp + strlen(sp); 1006 pathlen = p - sp; 1007 if (pathlen) { 1008 /* Copy sp into xp, stuffing any MAGIC characters 1009 * on the way 1010 */ 1011 const char *s = sp; 1012 1013 XcheckN(xs, xp, pathlen * 2); 1014 while (s < p) { 1015 if (ISMAGIC(*s)) 1016 *xp++ = MAGIC; 1017 *xp++ = *s++; 1018 } 1019 *xp++ = DIRSEP; 1020 pathlen++; 1021 } 1022 sp = p; 1023 XcheckN(xs, xp, patlen); 1024 memcpy(xp, pat, patlen); 1025 1026 oldsize = XPsize(*wp); 1027 glob_str(Xstring(xs, xp), wp, 1); /* mark dirs */ 1028 newsize = XPsize(*wp); 1029 1030 /* Check that each match is executable... */ 1031 words = (char **) XPptrv(*wp); 1032 for (i = j = oldsize; i < newsize; i++) { 1033 staterr = 0; 1034 if ((search_access(words[i], X_OK, &staterr) >= 0) 1035 || (staterr == EISDIR)) { 1036 words[j] = words[i]; 1037 if (!(flags & XCF_FULLPATH)) 1038 memmove(words[j], words[j] + pathlen, 1039 strlen(words[j] + pathlen) + 1); 1040 j++; 1041 } else 1042 afree(words[i], ATEMP); 1043 } 1044 wp->cur = (void **) &words[j]; 1045 1046 if (!*sp++) 1047 break; 1048 } 1049 Xfree(xs, xp); 1050 } 1051 1052 /* 1053 * if argument string contains any special characters, they will 1054 * be escaped and the result will be put into edit buffer by 1055 * keybinding-specific function 1056 */ 1057 int 1058 x_escape(s, len, putbuf_func) 1059 const char *s; 1060 size_t len; 1061 int putbuf_func ARGS((const char *s, size_t len)); 1062 { 1063 size_t add, wlen; 1064 const char *ifs = str_val(local("IFS", 0)); 1065 int rval=0; 1066 1067 for (add = 0, wlen = len; wlen - add > 0; add++) { 1068 if (strchr("\\$(){}*&;#|<>\"'`", s[add]) || strchr(ifs, s[add])) { 1069 if (putbuf_func(s, add) != 0) { 1070 rval = -1; 1071 break; 1072 } 1073 1074 putbuf_func("\\", 1); 1075 putbuf_func(&s[add], 1); 1076 1077 add++; 1078 wlen -= add; 1079 s += add; 1080 add = -1; /* after the increment it will go to 0 */ 1081 } 1082 } 1083 if (wlen > 0 && rval == 0) 1084 rval = putbuf_func(s, wlen); 1085 1086 return (rval); 1087 } 1088 #endif /* EDIT */ 1089