1 /* $NetBSD: filecomplete.c,v 1.70 2022/03/12 15:29:17 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jaromir Dolecek.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "config.h"
33
34 #if !defined(lint) && !defined(SCCSID)
35 __RCSID("$NetBSD: filecomplete.c,v 1.70 2022/03/12 15:29:17 christos Exp $");
36 #endif /* not lint && not SCCSID */
37
38 #include <sys/types.h>
39 #include <sys/stat.h>
40 #include <dirent.h>
41 #include <errno.h>
42 #include <fcntl.h>
43 #include <limits.h>
44 #include <pwd.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49
50 #include "el.h"
51 #include "filecomplete.h"
52
53 static const wchar_t break_chars[] = L" \t\n\"\\'`@$><=;|&{(";
54
55 /********************************/
56 /* completion functions */
57
58 /*
59 * does tilde expansion of strings of type ``~user/foo''
60 * if ``user'' isn't valid user name or ``txt'' doesn't start
61 * w/ '~', returns pointer to strdup()ed copy of ``txt''
62 *
63 * it's the caller's responsibility to free() the returned string
64 */
65 char *
fn_tilde_expand(const char * txt)66 fn_tilde_expand(const char *txt)
67 {
68 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
69 struct passwd pwres;
70 char pwbuf[1024];
71 #endif
72 struct passwd *pass;
73 const char *pos;
74 char *temp;
75 size_t len = 0;
76
77 if (txt[0] != '~')
78 return strdup(txt);
79
80 pos = strchr(txt + 1, '/');
81 if (pos == NULL) {
82 temp = strdup(txt + 1);
83 if (temp == NULL)
84 return NULL;
85 } else {
86 /* text until string after slash */
87 len = (size_t)(pos - txt + 1);
88 temp = el_calloc(len, sizeof(*temp));
89 if (temp == NULL)
90 return NULL;
91 (void)strlcpy(temp, txt + 1, len - 1);
92 }
93 if (temp[0] == 0) {
94 #ifdef HAVE_GETPW_R_POSIX
95 if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf),
96 &pass) != 0)
97 pass = NULL;
98 #elif HAVE_GETPW_R_DRAFT
99 pass = getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf));
100 #else
101 pass = getpwuid(getuid());
102 #endif
103 } else {
104 #ifdef HAVE_GETPW_R_POSIX
105 if (getpwnam_r(temp, &pwres, pwbuf, sizeof(pwbuf), &pass) != 0)
106 pass = NULL;
107 #elif HAVE_GETPW_R_DRAFT
108 pass = getpwnam_r(temp, &pwres, pwbuf, sizeof(pwbuf));
109 #else
110 pass = getpwnam(temp);
111 #endif
112 }
113 el_free(temp); /* value no more needed */
114 if (pass == NULL)
115 return strdup(txt);
116
117 /* update pointer txt to point at string immedially following */
118 /* first slash */
119 txt += len;
120
121 len = strlen(pass->pw_dir) + 1 + strlen(txt) + 1;
122 temp = el_calloc(len, sizeof(*temp));
123 if (temp == NULL)
124 return NULL;
125 (void)snprintf(temp, len, "%s/%s", pass->pw_dir, txt);
126
127 return temp;
128 }
129
130 static int
needs_escaping(wchar_t c)131 needs_escaping(wchar_t c)
132 {
133 switch (c) {
134 case '\'':
135 case '"':
136 case '(':
137 case ')':
138 case '\\':
139 case '<':
140 case '>':
141 case '$':
142 case '#':
143 case ' ':
144 case '\n':
145 case '\t':
146 case '?':
147 case ';':
148 case '`':
149 case '@':
150 case '=':
151 case '|':
152 case '{':
153 case '}':
154 case '&':
155 case '*':
156 case '[':
157 return 1;
158 default:
159 return 0;
160 }
161 }
162
163 static int
needs_dquote_escaping(char c)164 needs_dquote_escaping(char c)
165 {
166 switch (c) {
167 case '"':
168 case '\\':
169 case '`':
170 case '$':
171 return 1;
172 default:
173 return 0;
174 }
175 }
176
177
178 static wchar_t *
unescape_string(const wchar_t * string,size_t length)179 unescape_string(const wchar_t *string, size_t length)
180 {
181 size_t i;
182 size_t j = 0;
183 wchar_t *unescaped = el_calloc(length + 1, sizeof(*string));
184 if (unescaped == NULL)
185 return NULL;
186 for (i = 0; i < length ; i++) {
187 if (string[i] == '\\')
188 continue;
189 unescaped[j++] = string[i];
190 }
191 unescaped[j] = 0;
192 return unescaped;
193 }
194
195 static char *
escape_filename(EditLine * el,const char * filename,int single_match,const char * (* app_func)(const char *))196 escape_filename(EditLine * el, const char *filename, int single_match,
197 const char *(*app_func)(const char *))
198 {
199 size_t original_len = 0;
200 size_t escaped_character_count = 0;
201 size_t offset = 0;
202 size_t newlen;
203 const char *s;
204 char c;
205 size_t s_quoted = 0; /* does the input contain a single quote */
206 size_t d_quoted = 0; /* does the input contain a double quote */
207 char *escaped_str;
208 wchar_t *temp = el->el_line.buffer;
209 const char *append_char = NULL;
210
211 if (filename == NULL)
212 return NULL;
213
214 while (temp != el->el_line.cursor) {
215 /*
216 * If we see a single quote but have not seen a double quote
217 * so far set/unset s_quote, unless it is already quoted
218 */
219 if (temp[0] == '\'' && !d_quoted &&
220 (temp == el->el_line.buffer || temp[-1] != '\\'))
221 s_quoted = !s_quoted;
222 /*
223 * vice versa to the above condition
224 */
225 else if (temp[0] == '"' && !s_quoted)
226 d_quoted = !d_quoted;
227 temp++;
228 }
229
230 /* Count number of special characters so that we can calculate
231 * number of extra bytes needed in the new string
232 */
233 for (s = filename; *s; s++, original_len++) {
234 c = *s;
235 /* Inside a single quote only single quotes need escaping */
236 if (s_quoted && c == '\'') {
237 escaped_character_count += 3;
238 continue;
239 }
240 /* Inside double quotes only ", \, ` and $ need escaping */
241 if (d_quoted && needs_dquote_escaping(c)) {
242 escaped_character_count++;
243 continue;
244 }
245 if (!s_quoted && !d_quoted && needs_escaping(c))
246 escaped_character_count++;
247 }
248
249 newlen = original_len + escaped_character_count + 1;
250 if (s_quoted || d_quoted)
251 newlen++;
252
253 if (single_match && app_func)
254 newlen++;
255
256 if ((escaped_str = el_malloc(newlen)) == NULL)
257 return NULL;
258
259 for (s = filename; *s; s++) {
260 c = *s;
261 if (!needs_escaping(c)) {
262 /* no escaping is required continue as usual */
263 escaped_str[offset++] = c;
264 continue;
265 }
266
267 /* single quotes inside single quotes require special handling */
268 if (c == '\'' && s_quoted) {
269 escaped_str[offset++] = '\'';
270 escaped_str[offset++] = '\\';
271 escaped_str[offset++] = '\'';
272 escaped_str[offset++] = '\'';
273 continue;
274 }
275
276 /* Otherwise no escaping needed inside single quotes */
277 if (s_quoted) {
278 escaped_str[offset++] = c;
279 continue;
280 }
281
282 /* No escaping needed inside a double quoted string either
283 * unless we see a '$', '\', '`', or '"' (itself)
284 */
285 if (d_quoted && !needs_dquote_escaping(c)) {
286 escaped_str[offset++] = c;
287 continue;
288 }
289
290 /* If we reach here that means escaping is actually needed */
291 escaped_str[offset++] = '\\';
292 escaped_str[offset++] = c;
293 }
294
295 if (single_match && app_func) {
296 escaped_str[offset] = 0;
297 append_char = app_func(filename);
298 /* we want to append space only if we are not inside quotes */
299 if (append_char[0] == ' ') {
300 if (!s_quoted && !d_quoted)
301 escaped_str[offset++] = append_char[0];
302 } else
303 escaped_str[offset++] = append_char[0];
304 }
305
306 /* close the quotes if single match and the match is not a directory */
307 if (single_match && (append_char && append_char[0] == ' ')) {
308 if (s_quoted)
309 escaped_str[offset++] = '\'';
310 else if (d_quoted)
311 escaped_str[offset++] = '"';
312 }
313
314 escaped_str[offset] = 0;
315 return escaped_str;
316 }
317
318 /*
319 * return first found file name starting by the ``text'' or NULL if no
320 * such file can be found
321 * value of ``state'' is ignored
322 *
323 * it's the caller's responsibility to free the returned string
324 */
325 char *
fn_filename_completion_function(const char * text,int state)326 fn_filename_completion_function(const char *text, int state)
327 {
328 static DIR *dir = NULL;
329 static char *filename = NULL, *dirname = NULL, *dirpath = NULL;
330 static size_t filename_len = 0;
331 struct dirent *entry;
332 char *temp;
333 const char *pos;
334 size_t len;
335
336 if (state == 0 || dir == NULL) {
337 pos = strrchr(text, '/');
338 if (pos) {
339 char *nptr;
340 pos++;
341 nptr = el_realloc(filename, (strlen(pos) + 1) *
342 sizeof(*nptr));
343 if (nptr == NULL) {
344 el_free(filename);
345 filename = NULL;
346 return NULL;
347 }
348 filename = nptr;
349 (void)strcpy(filename, pos);
350 len = (size_t)(pos - text); /* including last slash */
351
352 nptr = el_realloc(dirname, (len + 1) *
353 sizeof(*nptr));
354 if (nptr == NULL) {
355 el_free(dirname);
356 dirname = NULL;
357 return NULL;
358 }
359 dirname = nptr;
360 (void)strlcpy(dirname, text, len + 1);
361 } else {
362 el_free(filename);
363 if (*text == 0)
364 filename = NULL;
365 else {
366 filename = strdup(text);
367 if (filename == NULL)
368 return NULL;
369 }
370 el_free(dirname);
371 dirname = NULL;
372 }
373
374 if (dir != NULL) {
375 (void)closedir(dir);
376 dir = NULL;
377 }
378
379 /* support for ``~user'' syntax */
380
381 el_free(dirpath);
382 dirpath = NULL;
383 if (dirname == NULL) {
384 if ((dirname = strdup("")) == NULL)
385 return NULL;
386 dirpath = strdup("./");
387 } else if (*dirname == '~')
388 dirpath = fn_tilde_expand(dirname);
389 else
390 dirpath = strdup(dirname);
391
392 if (dirpath == NULL)
393 return NULL;
394
395 dir = opendir(dirpath);
396 if (!dir)
397 return NULL; /* cannot open the directory */
398
399 /* will be used in cycle */
400 filename_len = filename ? strlen(filename) : 0;
401 }
402
403 /* find the match */
404 while ((entry = readdir(dir)) != NULL) {
405 /* skip . and .. */
406 if (entry->d_name[0] == '.' && (!entry->d_name[1]
407 || (entry->d_name[1] == '.' && !entry->d_name[2])))
408 continue;
409 if (filename_len == 0)
410 break;
411 /* otherwise, get first entry where first */
412 /* filename_len characters are equal */
413 if (entry->d_name[0] == filename[0]
414 /* Some dirents have d_namlen, but it is not portable. */
415 && strlen(entry->d_name) >= filename_len
416 && strncmp(entry->d_name, filename,
417 filename_len) == 0)
418 break;
419 }
420
421 if (entry) { /* match found */
422
423 /* Some dirents have d_namlen, but it is not portable. */
424 len = strlen(entry->d_name);
425
426 len = strlen(dirname) + len + 1;
427 temp = el_calloc(len, sizeof(*temp));
428 if (temp == NULL)
429 return NULL;
430 (void)snprintf(temp, len, "%s%s", dirname, entry->d_name);
431 } else {
432 (void)closedir(dir);
433 dir = NULL;
434 temp = NULL;
435 }
436
437 return temp;
438 }
439
440
441 static const char *
append_char_function(const char * name)442 append_char_function(const char *name)
443 {
444 struct stat stbuf;
445 char *expname = *name == '~' ? fn_tilde_expand(name) : NULL;
446 const char *rs = " ";
447
448 if (stat(expname ? expname : name, &stbuf) == -1)
449 goto out;
450 if (S_ISDIR(stbuf.st_mode))
451 rs = "/";
452 out:
453 if (expname)
454 el_free(expname);
455 return rs;
456 }
457 /*
458 * returns list of completions for text given
459 * non-static for readline.
460 */
461 char ** completion_matches(const char *, char *(*)(const char *, int));
462 char **
completion_matches(const char * text,char * (* genfunc)(const char *,int))463 completion_matches(const char *text, char *(*genfunc)(const char *, int))
464 {
465 char **match_list = NULL, *retstr, *prevstr;
466 size_t match_list_len, max_equal, which, i;
467 size_t matches;
468
469 matches = 0;
470 match_list_len = 1;
471 while ((retstr = (*genfunc) (text, (int)matches)) != NULL) {
472 /* allow for list terminator here */
473 if (matches + 3 >= match_list_len) {
474 char **nmatch_list;
475 while (matches + 3 >= match_list_len)
476 match_list_len <<= 1;
477 nmatch_list = el_realloc(match_list,
478 match_list_len * sizeof(*nmatch_list));
479 if (nmatch_list == NULL) {
480 el_free(match_list);
481 return NULL;
482 }
483 match_list = nmatch_list;
484
485 }
486 match_list[++matches] = retstr;
487 }
488
489 if (!match_list)
490 return NULL; /* nothing found */
491
492 /* find least denominator and insert it to match_list[0] */
493 which = 2;
494 prevstr = match_list[1];
495 max_equal = strlen(prevstr);
496 for (; which <= matches; which++) {
497 for (i = 0; i < max_equal &&
498 prevstr[i] == match_list[which][i]; i++)
499 continue;
500 max_equal = i;
501 }
502
503 retstr = el_calloc(max_equal + 1, sizeof(*retstr));
504 if (retstr == NULL) {
505 el_free(match_list);
506 return NULL;
507 }
508 (void)strlcpy(retstr, match_list[1], max_equal + 1);
509 match_list[0] = retstr;
510
511 /* add NULL as last pointer to the array */
512 match_list[matches + 1] = NULL;
513
514 return match_list;
515 }
516
517 /*
518 * Sort function for qsort(). Just wrapper around strcasecmp().
519 */
520 static int
_fn_qsort_string_compare(const void * i1,const void * i2)521 _fn_qsort_string_compare(const void *i1, const void *i2)
522 {
523 const char *s1 = ((const char * const *)i1)[0];
524 const char *s2 = ((const char * const *)i2)[0];
525
526 return strcasecmp(s1, s2);
527 }
528
529 /*
530 * Display list of strings in columnar format on readline's output stream.
531 * 'matches' is list of strings, 'num' is number of strings in 'matches',
532 * 'width' is maximum length of string in 'matches'.
533 *
534 * matches[0] is not one of the match strings, but it is counted in
535 * num, so the strings are matches[1] *through* matches[num-1].
536 */
537 void
fn_display_match_list(EditLine * el,char ** matches,size_t num,size_t width,const char * (* app_func)(const char *))538 fn_display_match_list(EditLine * el, char **matches, size_t num, size_t width,
539 const char *(*app_func) (const char *))
540 {
541 size_t line, lines, col, cols, thisguy;
542 int screenwidth = el->el_terminal.t_size.h;
543 if (app_func == NULL)
544 app_func = append_char_function;
545
546 /* Ignore matches[0]. Avoid 1-based array logic below. */
547 matches++;
548 num--;
549
550 /*
551 * Find out how many entries can be put on one line; count
552 * with one space between strings the same way it's printed.
553 */
554 cols = (size_t)screenwidth / (width + 2);
555 if (cols == 0)
556 cols = 1;
557
558 /* how many lines of output, rounded up */
559 lines = (num + cols - 1) / cols;
560
561 /* Sort the items. */
562 qsort(matches, num, sizeof(char *), _fn_qsort_string_compare);
563
564 /*
565 * On the ith line print elements i, i+lines, i+lines*2, etc.
566 */
567 for (line = 0; line < lines; line++) {
568 for (col = 0; col < cols; col++) {
569 thisguy = line + col * lines;
570 if (thisguy >= num)
571 break;
572 (void)fprintf(el->el_outfile, "%s%s%s",
573 col == 0 ? "" : " ", matches[thisguy],
574 (*app_func)(matches[thisguy]));
575 (void)fprintf(el->el_outfile, "%-*s",
576 (int) (width - strlen(matches[thisguy])), "");
577 }
578 (void)fprintf(el->el_outfile, "\n");
579 }
580 }
581
582 static wchar_t *
find_word_to_complete(const wchar_t * cursor,const wchar_t * buffer,const wchar_t * word_break,const wchar_t * special_prefixes,size_t * length,int do_unescape)583 find_word_to_complete(const wchar_t * cursor, const wchar_t * buffer,
584 const wchar_t * word_break, const wchar_t * special_prefixes, size_t * length,
585 int do_unescape)
586 {
587 /* We now look backwards for the start of a filename/variable word */
588 const wchar_t *ctemp = cursor;
589 wchar_t *temp;
590 size_t len;
591
592 /* if the cursor is placed at a slash or a quote, we need to find the
593 * word before it
594 */
595 if (ctemp > buffer) {
596 switch (ctemp[-1]) {
597 case '\\':
598 case '\'':
599 case '"':
600 ctemp--;
601 break;
602 default:
603 break;
604 }
605 }
606
607 for (;;) {
608 if (ctemp <= buffer)
609 break;
610 if (ctemp - buffer >= 2 && ctemp[-2] == '\\' &&
611 needs_escaping(ctemp[-1])) {
612 ctemp -= 2;
613 continue;
614 }
615 if (wcschr(word_break, ctemp[-1]))
616 break;
617 if (special_prefixes && wcschr(special_prefixes, ctemp[-1]))
618 break;
619 ctemp--;
620 }
621
622 len = (size_t) (cursor - ctemp);
623 if (len == 1 && (ctemp[0] == '\'' || ctemp[0] == '"')) {
624 len = 0;
625 ctemp++;
626 }
627 *length = len;
628 if (do_unescape) {
629 wchar_t *unescaped_word = unescape_string(ctemp, len);
630 if (unescaped_word == NULL)
631 return NULL;
632 return unescaped_word;
633 }
634 temp = el_malloc((len + 1) * sizeof(*temp));
635 (void) wcsncpy(temp, ctemp, len);
636 temp[len] = '\0';
637 return temp;
638 }
639
640 /*
641 * Complete the word at or before point,
642 * 'what_to_do' says what to do with the completion.
643 * \t means do standard completion.
644 * `?' means list the possible completions.
645 * `*' means insert all of the possible completions.
646 * `!' means to do standard completion, and list all possible completions if
647 * there is more than one.
648 *
649 * Note: '*' support is not implemented
650 * '!' could never be invoked
651 */
652 int
fn_complete2(EditLine * el,char * (* complete_func)(const char *,int),char ** (* attempted_completion_function)(const char *,int,int),const wchar_t * word_break,const wchar_t * special_prefixes,const char * (* app_func)(const char *),size_t query_items,int * completion_type,int * over,int * point,int * end,unsigned int flags)653 fn_complete2(EditLine *el,
654 char *(*complete_func)(const char *, int),
655 char **(*attempted_completion_function)(const char *, int, int),
656 const wchar_t *word_break, const wchar_t *special_prefixes,
657 const char *(*app_func)(const char *), size_t query_items,
658 int *completion_type, int *over, int *point, int *end,
659 unsigned int flags)
660 {
661 const LineInfoW *li;
662 wchar_t *temp;
663 char **matches;
664 char *completion;
665 size_t len;
666 int what_to_do = '\t';
667 int retval = CC_NORM;
668 int do_unescape = flags & FN_QUOTE_MATCH;
669
670 if (el->el_state.lastcmd == el->el_state.thiscmd)
671 what_to_do = '?';
672
673 /* readline's rl_complete() has to be told what we did... */
674 if (completion_type != NULL)
675 *completion_type = what_to_do;
676
677 if (!complete_func)
678 complete_func = fn_filename_completion_function;
679 if (!app_func)
680 app_func = append_char_function;
681
682 li = el_wline(el);
683 temp = find_word_to_complete(li->cursor,
684 li->buffer, word_break, special_prefixes, &len, do_unescape);
685 if (temp == NULL)
686 goto out;
687
688 /* these can be used by function called in completion_matches() */
689 /* or (*attempted_completion_function)() */
690 if (point != NULL)
691 *point = (int)(li->cursor - li->buffer);
692 if (end != NULL)
693 *end = (int)(li->lastchar - li->buffer);
694
695 if (attempted_completion_function) {
696 int cur_off = (int)(li->cursor - li->buffer);
697 matches = (*attempted_completion_function)(
698 ct_encode_string(temp, &el->el_scratch),
699 cur_off - (int)len, cur_off);
700 } else
701 matches = NULL;
702 if (!attempted_completion_function ||
703 (over != NULL && !*over && !matches))
704 matches = completion_matches(
705 ct_encode_string(temp, &el->el_scratch), complete_func);
706
707 if (over != NULL)
708 *over = 0;
709
710 if (matches == NULL) {
711 goto out;
712 }
713 int i;
714 size_t matches_num, maxlen, match_len, match_display=1;
715 int single_match = matches[2] == NULL &&
716 (matches[1] == NULL || strcmp(matches[0], matches[1]) == 0);
717
718 retval = CC_REFRESH;
719
720 if (matches[0][0] != '\0') {
721 el_deletestr(el, (int)len);
722 if (flags & FN_QUOTE_MATCH)
723 completion = escape_filename(el, matches[0],
724 single_match, app_func);
725 else
726 completion = strdup(matches[0]);
727 if (completion == NULL)
728 goto out2;
729
730 /*
731 * Replace the completed string with the common part of
732 * all possible matches if there is a possible completion.
733 */
734 el_winsertstr(el,
735 ct_decode_string(completion, &el->el_scratch));
736
737 if (single_match && attempted_completion_function &&
738 !(flags & FN_QUOTE_MATCH))
739 {
740 /*
741 * We found an exact match. Add a space after
742 * it, unless we do filename completion and the
743 * object is a directory. Also do necessary
744 * escape quoting
745 */
746 el_winsertstr(el, ct_decode_string(
747 (*app_func)(completion), &el->el_scratch));
748 }
749 free(completion);
750 }
751
752
753 if (!single_match && (what_to_do == '!' || what_to_do == '?')) {
754 /*
755 * More than one match and requested to list possible
756 * matches.
757 */
758
759 for(i = 1, maxlen = 0; matches[i]; i++) {
760 match_len = strlen(matches[i]);
761 if (match_len > maxlen)
762 maxlen = match_len;
763 }
764 /* matches[1] through matches[i-1] are available */
765 matches_num = (size_t)(i - 1);
766
767 /* newline to get on next line from command line */
768 (void)fprintf(el->el_outfile, "\n");
769
770 /*
771 * If there are too many items, ask user for display
772 * confirmation.
773 */
774 if (matches_num > query_items) {
775 (void)fprintf(el->el_outfile,
776 "Display all %zu possibilities? (y or n) ",
777 matches_num);
778 (void)fflush(el->el_outfile);
779 if (getc(stdin) != 'y')
780 match_display = 0;
781 (void)fprintf(el->el_outfile, "\n");
782 }
783
784 if (match_display) {
785 /*
786 * Interface of this function requires the
787 * strings be matches[1..num-1] for compat.
788 * We have matches_num strings not counting
789 * the prefix in matches[0], so we need to
790 * add 1 to matches_num for the call.
791 */
792 fn_display_match_list(el, matches,
793 matches_num+1, maxlen, app_func);
794 }
795 retval = CC_REDISPLAY;
796 } else if (matches[0][0]) {
797 /*
798 * There was some common match, but the name was
799 * not complete enough. Next tab will print possible
800 * completions.
801 */
802 el_beep(el);
803 } else {
804 /* lcd is not a valid object - further specification */
805 /* is needed */
806 el_beep(el);
807 retval = CC_NORM;
808 }
809
810 /* free elements of array and the array itself */
811 out2:
812 for (i = 0; matches[i]; i++)
813 el_free(matches[i]);
814 el_free(matches);
815 matches = NULL;
816
817 out:
818 el_free(temp);
819 return retval;
820 }
821
822 int
fn_complete(EditLine * el,char * (* complete_func)(const char *,int),char ** (* attempted_completion_function)(const char *,int,int),const wchar_t * word_break,const wchar_t * special_prefixes,const char * (* app_func)(const char *),size_t query_items,int * completion_type,int * over,int * point,int * end)823 fn_complete(EditLine *el,
824 char *(*complete_func)(const char *, int),
825 char **(*attempted_completion_function)(const char *, int, int),
826 const wchar_t *word_break, const wchar_t *special_prefixes,
827 const char *(*app_func)(const char *), size_t query_items,
828 int *completion_type, int *over, int *point, int *end)
829 {
830 return fn_complete2(el, complete_func, attempted_completion_function,
831 word_break, special_prefixes, app_func, query_items,
832 completion_type, over, point, end,
833 attempted_completion_function ? 0 : FN_QUOTE_MATCH);
834 }
835
836 /*
837 * el-compatible wrapper around rl_complete; needed for key binding
838 */
839 /* ARGSUSED */
840 unsigned char
_el_fn_complete(EditLine * el,int ch)841 _el_fn_complete(EditLine *el, int ch __attribute__((__unused__)))
842 {
843 return (unsigned char)fn_complete(el, NULL, NULL,
844 break_chars, NULL, NULL, (size_t)100,
845 NULL, NULL, NULL, NULL);
846 }
847