1 /* $NetBSD: filecomplete.c,v 1.72 2023/02/03 22:01:42 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 #if !defined(lint) && !defined(SCCSID)
34 __RCSID("$NetBSD: filecomplete.c,v 1.72 2023/02/03 22:01:42 christos Exp $");
35 #endif /* not lint && not SCCSID */
36
37 #include <sys/types.h>
38 #include <sys/stat.h>
39 #include <dirent.h>
40 #include <errno.h>
41 #include <fcntl.h>
42 #include <limits.h>
43 #include <pwd.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <unistd.h>
48
49 #include "el.h"
50 #include "filecomplete.h"
51
52 static const wchar_t break_chars[] = L" \t\n\"\\'`@$><=;|&{(";
53
54 /********************************/
55 /* completion functions */
56
57 /*
58 * does tilde expansion of strings of type ``~user/foo''
59 * if ``user'' isn't valid user name or ``txt'' doesn't start
60 * w/ '~', returns pointer to strdup()ed copy of ``txt''
61 *
62 * it's the caller's responsibility to free() the returned string
63 */
64 char *
fn_tilde_expand(const char * txt)65 fn_tilde_expand(const char *txt)
66 {
67 #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
68 struct passwd pwres;
69 char pwbuf[1024];
70 #endif
71 struct passwd *pass;
72 const char *pos;
73 char *temp;
74 size_t len = 0;
75
76 if (txt[0] != '~')
77 return strdup(txt);
78
79 pos = strchr(txt + 1, '/');
80 if (pos == NULL) {
81 temp = strdup(txt + 1);
82 if (temp == NULL)
83 return NULL;
84 } else {
85 /* text until string after slash */
86 len = (size_t)(pos - txt + 1);
87 temp = el_calloc(len, sizeof(*temp));
88 if (temp == NULL)
89 return NULL;
90 (void)strlcpy(temp, txt + 1, len - 1);
91 }
92 if (temp[0] == 0) {
93 #ifdef HAVE_GETPW_R_POSIX
94 if (getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf),
95 &pass) != 0)
96 pass = NULL;
97 #elif HAVE_GETPW_R_DRAFT
98 pass = getpwuid_r(getuid(), &pwres, pwbuf, sizeof(pwbuf));
99 #else
100 pass = getpwuid(getuid());
101 #endif
102 } else {
103 #ifdef HAVE_GETPW_R_POSIX
104 if (getpwnam_r(temp, &pwres, pwbuf, sizeof(pwbuf), &pass) != 0)
105 pass = NULL;
106 #elif HAVE_GETPW_R_DRAFT
107 pass = getpwnam_r(temp, &pwres, pwbuf, sizeof(pwbuf));
108 #else
109 pass = getpwnam(temp);
110 #endif
111 }
112 el_free(temp); /* value no more needed */
113 if (pass == NULL)
114 return strdup(txt);
115
116 /* update pointer txt to point at string immedially following */
117 /* first slash */
118 txt += len;
119
120 len = strlen(pass->pw_dir) + 1 + strlen(txt) + 1;
121 temp = el_calloc(len, sizeof(*temp));
122 if (temp == NULL)
123 return NULL;
124 (void)snprintf(temp, len, "%s/%s", pass->pw_dir, txt);
125
126 return temp;
127 }
128
129 static int
needs_escaping(wchar_t c)130 needs_escaping(wchar_t c)
131 {
132 switch (c) {
133 case '\'':
134 case '"':
135 case '(':
136 case ')':
137 case '\\':
138 case '<':
139 case '>':
140 case '$':
141 case '#':
142 case ' ':
143 case '\n':
144 case '\t':
145 case '?':
146 case ';':
147 case '`':
148 case '@':
149 case '=':
150 case '|':
151 case '{':
152 case '}':
153 case '&':
154 case '*':
155 case '[':
156 return 1;
157 default:
158 return 0;
159 }
160 }
161
162 static int
needs_dquote_escaping(char c)163 needs_dquote_escaping(char c)
164 {
165 switch (c) {
166 case '"':
167 case '\\':
168 case '`':
169 case '$':
170 return 1;
171 default:
172 return 0;
173 }
174 }
175
176
177 static wchar_t *
unescape_string(const wchar_t * string,size_t length)178 unescape_string(const wchar_t *string, size_t length)
179 {
180 size_t i;
181 size_t j = 0;
182 wchar_t *unescaped = el_calloc(length + 1, sizeof(*string));
183 if (unescaped == NULL)
184 return NULL;
185 for (i = 0; i < length ; i++) {
186 if (string[i] == '\\')
187 continue;
188 unescaped[j++] = string[i];
189 }
190 unescaped[j] = 0;
191 return unescaped;
192 }
193
194 static char *
escape_filename(EditLine * el,const char * filename,int single_match,const char * (* app_func)(const char *))195 escape_filename(EditLine * el, const char *filename, int single_match,
196 const char *(*app_func)(const char *))
197 {
198 size_t original_len = 0;
199 size_t escaped_character_count = 0;
200 size_t offset = 0;
201 size_t newlen;
202 const char *s;
203 char c;
204 size_t s_quoted = 0; /* does the input contain a single quote */
205 size_t d_quoted = 0; /* does the input contain a double quote */
206 char *escaped_str;
207 wchar_t *temp = el->el_line.buffer;
208 const char *append_char = NULL;
209
210 if (filename == NULL)
211 return NULL;
212
213 while (temp != el->el_line.cursor) {
214 /*
215 * If we see a single quote but have not seen a double quote
216 * so far set/unset s_quote, unless it is already quoted
217 */
218 if (temp[0] == '\'' && !d_quoted &&
219 (temp == el->el_line.buffer || temp[-1] != '\\'))
220 s_quoted = !s_quoted;
221 /*
222 * vice versa to the above condition
223 */
224 else if (temp[0] == '"' && !s_quoted)
225 d_quoted = !d_quoted;
226 temp++;
227 }
228
229 /* Count number of special characters so that we can calculate
230 * number of extra bytes needed in the new string
231 */
232 for (s = filename; *s; s++, original_len++) {
233 c = *s;
234 /* Inside a single quote only single quotes need escaping */
235 if (s_quoted && c == '\'') {
236 escaped_character_count += 3;
237 continue;
238 }
239 /* Inside double quotes only ", \, ` and $ need escaping */
240 if (d_quoted && needs_dquote_escaping(c)) {
241 escaped_character_count++;
242 continue;
243 }
244 if (!s_quoted && !d_quoted && needs_escaping(c))
245 escaped_character_count++;
246 }
247
248 newlen = original_len + escaped_character_count + 1;
249 if (s_quoted || d_quoted)
250 newlen++;
251
252 if (single_match && app_func)
253 newlen++;
254
255 if ((escaped_str = el_malloc(newlen)) == NULL)
256 return NULL;
257
258 for (s = filename; *s; s++) {
259 c = *s;
260 if (!needs_escaping(c)) {
261 /* no escaping is required continue as usual */
262 escaped_str[offset++] = c;
263 continue;
264 }
265
266 /* single quotes inside single quotes require special handling */
267 if (c == '\'' && s_quoted) {
268 escaped_str[offset++] = '\'';
269 escaped_str[offset++] = '\\';
270 escaped_str[offset++] = '\'';
271 escaped_str[offset++] = '\'';
272 continue;
273 }
274
275 /* Otherwise no escaping needed inside single quotes */
276 if (s_quoted) {
277 escaped_str[offset++] = c;
278 continue;
279 }
280
281 /* No escaping needed inside a double quoted string either
282 * unless we see a '$', '\', '`', or '"' (itself)
283 */
284 if (d_quoted && !needs_dquote_escaping(c)) {
285 escaped_str[offset++] = c;
286 continue;
287 }
288
289 /* If we reach here that means escaping is actually needed */
290 escaped_str[offset++] = '\\';
291 escaped_str[offset++] = c;
292 }
293
294 if (single_match && app_func) {
295 escaped_str[offset] = 0;
296 append_char = app_func(filename);
297 /* we want to append space only if we are not inside quotes */
298 if (append_char[0] == ' ') {
299 if (!s_quoted && !d_quoted)
300 escaped_str[offset++] = append_char[0];
301 } else
302 escaped_str[offset++] = append_char[0];
303 }
304
305 /* close the quotes if single match and the match is not a directory */
306 if (single_match && (append_char && append_char[0] == ' ')) {
307 if (s_quoted)
308 escaped_str[offset++] = '\'';
309 else if (d_quoted)
310 escaped_str[offset++] = '"';
311 }
312
313 escaped_str[offset] = 0;
314 return escaped_str;
315 }
316
317 /*
318 * return first found file name starting by the ``text'' or NULL if no
319 * such file can be found
320 * value of ``state'' is ignored
321 *
322 * it's the caller's responsibility to free the returned string
323 */
324 char *
fn_filename_completion_function(const char * text,int state)325 fn_filename_completion_function(const char *text, int state)
326 {
327 static DIR *dir = NULL;
328 static char *filename = NULL, *dirname = NULL, *dirpath = NULL;
329 static size_t filename_len = 0;
330 struct dirent *entry;
331 char *temp;
332 const char *pos;
333 size_t len;
334
335 if (state == 0 || dir == NULL) {
336 pos = strrchr(text, '/');
337 if (pos) {
338 char *nptr;
339 pos++;
340 nptr = el_realloc(filename, (strlen(pos) + 1) *
341 sizeof(*nptr));
342 if (nptr == NULL) {
343 el_free(filename);
344 filename = NULL;
345 return NULL;
346 }
347 filename = nptr;
348 (void)strcpy(filename, pos);
349 len = (size_t)(pos - text); /* including last slash */
350
351 nptr = el_realloc(dirname, (len + 1) *
352 sizeof(*nptr));
353 if (nptr == NULL) {
354 el_free(dirname);
355 dirname = NULL;
356 return NULL;
357 }
358 dirname = nptr;
359 (void)strlcpy(dirname, text, len + 1);
360 } else {
361 el_free(filename);
362 if (*text == 0)
363 filename = NULL;
364 else {
365 filename = strdup(text);
366 if (filename == NULL)
367 return NULL;
368 }
369 el_free(dirname);
370 dirname = NULL;
371 }
372
373 if (dir != NULL) {
374 (void)closedir(dir);
375 dir = NULL;
376 }
377
378 /* support for ``~user'' syntax */
379
380 el_free(dirpath);
381 dirpath = NULL;
382 if (dirname == NULL) {
383 if ((dirname = strdup("")) == NULL)
384 return NULL;
385 dirpath = strdup("./");
386 } else if (*dirname == '~')
387 dirpath = fn_tilde_expand(dirname);
388 else
389 dirpath = strdup(dirname);
390
391 if (dirpath == NULL)
392 return NULL;
393
394 dir = opendir(dirpath);
395 if (!dir)
396 return NULL; /* cannot open the directory */
397
398 /* will be used in cycle */
399 filename_len = filename ? strlen(filename) : 0;
400 }
401
402 /* find the match */
403 while ((entry = readdir(dir)) != NULL) {
404 /* skip . and .. */
405 if (entry->d_name[0] == '.' && (!entry->d_name[1]
406 || (entry->d_name[1] == '.' && !entry->d_name[2])))
407 continue;
408 if (filename_len == 0)
409 break;
410 /* otherwise, get first entry where first */
411 /* filename_len characters are equal */
412 if (entry->d_name[0] == filename[0]
413 #if HAVE_STRUCT_DIRENT_D_NAMLEN
414 && entry->d_namlen >= filename_len
415 #else
416 && strlen(entry->d_name) >= filename_len
417 #endif
418 && strncmp(entry->d_name, filename,
419 filename_len) == 0)
420 break;
421 }
422
423 if (entry) { /* match found */
424
425 #if HAVE_STRUCT_DIRENT_D_NAMLEN
426 len = entry->d_namlen;
427 #else
428 len = strlen(entry->d_name);
429 #endif
430
431 len = strlen(dirname) + len + 1;
432 temp = el_calloc(len, sizeof(*temp));
433 if (temp == NULL)
434 return NULL;
435 (void)snprintf(temp, len, "%s%s", dirname, entry->d_name);
436 } else {
437 (void)closedir(dir);
438 dir = NULL;
439 temp = NULL;
440 }
441
442 return temp;
443 }
444
445
446 static const char *
append_char_function(const char * name)447 append_char_function(const char *name)
448 {
449 struct stat stbuf;
450 char *expname = *name == '~' ? fn_tilde_expand(name) : NULL;
451 const char *rs = " ";
452
453 if (stat(expname ? expname : name, &stbuf) == -1)
454 goto out;
455 if (S_ISDIR(stbuf.st_mode))
456 rs = "/";
457 out:
458 if (expname)
459 el_free(expname);
460 return rs;
461 }
462 /*
463 * returns list of completions for text given
464 * non-static for readline.
465 */
466 char ** completion_matches(const char *, char *(*)(const char *, int));
467 char **
completion_matches(const char * text,char * (* genfunc)(const char *,int))468 completion_matches(const char *text, char *(*genfunc)(const char *, int))
469 {
470 char **match_list = NULL, *retstr, *prevstr;
471 size_t match_list_len, max_equal, which, i;
472 size_t matches;
473
474 matches = 0;
475 match_list_len = 1;
476 while ((retstr = (*genfunc) (text, (int)matches)) != NULL) {
477 /* allow for list terminator here */
478 if (matches + 3 >= match_list_len) {
479 char **nmatch_list;
480 while (matches + 3 >= match_list_len)
481 match_list_len <<= 1;
482 nmatch_list = el_realloc(match_list,
483 match_list_len * sizeof(*nmatch_list));
484 if (nmatch_list == NULL) {
485 el_free(match_list);
486 return NULL;
487 }
488 match_list = nmatch_list;
489
490 }
491 match_list[++matches] = retstr;
492 }
493
494 if (!match_list)
495 return NULL; /* nothing found */
496
497 /* find least denominator and insert it to match_list[0] */
498 which = 2;
499 prevstr = match_list[1];
500 max_equal = strlen(prevstr);
501 for (; which <= matches; which++) {
502 for (i = 0; i < max_equal &&
503 prevstr[i] == match_list[which][i]; i++)
504 continue;
505 max_equal = i;
506 }
507
508 retstr = el_calloc(max_equal + 1, sizeof(*retstr));
509 if (retstr == NULL) {
510 el_free(match_list);
511 return NULL;
512 }
513 (void)strlcpy(retstr, match_list[1], max_equal + 1);
514 match_list[0] = retstr;
515
516 /* add NULL as last pointer to the array */
517 match_list[matches + 1] = NULL;
518
519 return match_list;
520 }
521
522 /*
523 * Sort function for qsort(). Just wrapper around strcasecmp().
524 */
525 static int
_fn_qsort_string_compare(const void * i1,const void * i2)526 _fn_qsort_string_compare(const void *i1, const void *i2)
527 {
528 const char *s1 = ((const char * const *)i1)[0];
529 const char *s2 = ((const char * const *)i2)[0];
530
531 return strcasecmp(s1, s2);
532 }
533
534 /*
535 * Display list of strings in columnar format on readline's output stream.
536 * 'matches' is list of strings, 'num' is number of strings in 'matches',
537 * 'width' is maximum length of string in 'matches'.
538 *
539 * matches[0] is not one of the match strings, but it is counted in
540 * num, so the strings are matches[1] *through* matches[num-1].
541 */
542 void
fn_display_match_list(EditLine * el,char ** matches,size_t num,size_t width,const char * (* app_func)(const char *))543 fn_display_match_list(EditLine * el, char **matches, size_t num, size_t width,
544 const char *(*app_func) (const char *))
545 {
546 size_t line, lines, col, cols, thisguy;
547 int screenwidth = el->el_terminal.t_size.h;
548 if (app_func == NULL)
549 app_func = append_char_function;
550
551 /* Ignore matches[0]. Avoid 1-based array logic below. */
552 matches++;
553 num--;
554
555 /*
556 * Find out how many entries can be put on one line; count
557 * with one space between strings the same way it's printed.
558 */
559 cols = (size_t)screenwidth / (width + 2);
560 if (cols == 0)
561 cols = 1;
562
563 /* how many lines of output, rounded up */
564 lines = (num + cols - 1) / cols;
565
566 /* Sort the items. */
567 qsort(matches, num, sizeof(char *), _fn_qsort_string_compare);
568
569 /*
570 * On the ith line print elements i, i+lines, i+lines*2, etc.
571 */
572 for (line = 0; line < lines; line++) {
573 for (col = 0; col < cols; col++) {
574 thisguy = line + col * lines;
575 if (thisguy >= num)
576 break;
577 (void)fprintf(el->el_outfile, "%s%s%s",
578 col == 0 ? "" : " ", matches[thisguy],
579 (*app_func)(matches[thisguy]));
580 (void)fprintf(el->el_outfile, "%-*s",
581 (int) (width - strlen(matches[thisguy])), "");
582 }
583 (void)fprintf(el->el_outfile, "\n");
584 }
585 }
586
587 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)588 find_word_to_complete(const wchar_t * cursor, const wchar_t * buffer,
589 const wchar_t * word_break, const wchar_t * special_prefixes, size_t * length,
590 int do_unescape)
591 {
592 /* We now look backwards for the start of a filename/variable word */
593 const wchar_t *ctemp = cursor;
594 wchar_t *temp;
595 size_t len;
596
597 /* if the cursor is placed at a slash or a quote, we need to find the
598 * word before it
599 */
600 if (ctemp > buffer) {
601 switch (ctemp[-1]) {
602 case '\\':
603 case '\'':
604 case '"':
605 ctemp--;
606 break;
607 default:
608 break;
609 }
610 }
611
612 for (;;) {
613 if (ctemp <= buffer)
614 break;
615 if (ctemp - buffer >= 2 && ctemp[-2] == '\\' &&
616 needs_escaping(ctemp[-1])) {
617 ctemp -= 2;
618 continue;
619 }
620 if (wcschr(word_break, ctemp[-1]))
621 break;
622 if (special_prefixes && wcschr(special_prefixes, ctemp[-1]))
623 break;
624 ctemp--;
625 }
626
627 len = (size_t) (cursor - ctemp);
628 if (len == 1 && (ctemp[0] == '\'' || ctemp[0] == '"')) {
629 len = 0;
630 ctemp++;
631 }
632 *length = len;
633 if (do_unescape) {
634 wchar_t *unescaped_word = unescape_string(ctemp, len);
635 if (unescaped_word == NULL)
636 return NULL;
637 return unescaped_word;
638 }
639 temp = el_malloc((len + 1) * sizeof(*temp));
640 if (temp == NULL)
641 return NULL;
642 (void) wcsncpy(temp, ctemp, len);
643 temp[len] = '\0';
644 return temp;
645 }
646
647 /*
648 * Complete the word at or before point,
649 * 'what_to_do' says what to do with the completion.
650 * \t means do standard completion.
651 * `?' means list the possible completions.
652 * `*' means insert all of the possible completions.
653 * `!' means to do standard completion, and list all possible completions if
654 * there is more than one.
655 *
656 * Note: '*' support is not implemented
657 * '!' could never be invoked
658 */
659 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)660 fn_complete2(EditLine *el,
661 char *(*complete_func)(const char *, int),
662 char **(*attempted_completion_function)(const char *, int, int),
663 const wchar_t *word_break, const wchar_t *special_prefixes,
664 const char *(*app_func)(const char *), size_t query_items,
665 int *completion_type, int *over, int *point, int *end,
666 unsigned int flags)
667 {
668 const LineInfoW *li;
669 wchar_t *temp;
670 char **matches;
671 char *completion;
672 size_t len;
673 int what_to_do = '\t';
674 int retval = CC_NORM;
675 int do_unescape = flags & FN_QUOTE_MATCH;
676
677 if (el->el_state.lastcmd == el->el_state.thiscmd)
678 what_to_do = '?';
679
680 /* readline's rl_complete() has to be told what we did... */
681 if (completion_type != NULL)
682 *completion_type = what_to_do;
683
684 if (!complete_func)
685 complete_func = fn_filename_completion_function;
686 if (!app_func)
687 app_func = append_char_function;
688
689 li = el_wline(el);
690 temp = find_word_to_complete(li->cursor,
691 li->buffer, word_break, special_prefixes, &len, do_unescape);
692 if (temp == NULL)
693 goto out;
694
695 /* these can be used by function called in completion_matches() */
696 /* or (*attempted_completion_function)() */
697 if (point != NULL)
698 *point = (int)(li->cursor - li->buffer);
699 if (end != NULL)
700 *end = (int)(li->lastchar - li->buffer);
701
702 if (attempted_completion_function) {
703 int cur_off = (int)(li->cursor - li->buffer);
704 matches = (*attempted_completion_function)(
705 ct_encode_string(temp, &el->el_scratch),
706 cur_off - (int)len, cur_off);
707 } else
708 matches = NULL;
709 if (!attempted_completion_function ||
710 (over != NULL && !*over && !matches))
711 matches = completion_matches(
712 ct_encode_string(temp, &el->el_scratch), complete_func);
713
714 if (over != NULL)
715 *over = 0;
716
717 if (matches == NULL) {
718 goto out;
719 }
720 int i;
721 size_t matches_num, maxlen, match_len, match_display=1;
722 int single_match = matches[2] == NULL &&
723 (matches[1] == NULL || strcmp(matches[0], matches[1]) == 0);
724
725 retval = CC_REFRESH;
726
727 if (matches[0][0] != '\0') {
728 el_deletestr(el, (int)len);
729 if (flags & FN_QUOTE_MATCH)
730 completion = escape_filename(el, matches[0],
731 single_match, app_func);
732 else
733 completion = strdup(matches[0]);
734 if (completion == NULL)
735 goto out2;
736
737 /*
738 * Replace the completed string with the common part of
739 * all possible matches if there is a possible completion.
740 */
741 el_winsertstr(el,
742 ct_decode_string(completion, &el->el_scratch));
743
744 if (single_match && attempted_completion_function &&
745 !(flags & FN_QUOTE_MATCH))
746 {
747 /*
748 * We found an exact match. Add a space after
749 * it, unless we do filename completion and the
750 * object is a directory. Also do necessary
751 * escape quoting
752 */
753 el_winsertstr(el, ct_decode_string(
754 (*app_func)(completion), &el->el_scratch));
755 }
756 free(completion);
757 }
758
759
760 if (!single_match && (what_to_do == '!' || what_to_do == '?')) {
761 /*
762 * More than one match and requested to list possible
763 * matches.
764 */
765
766 for(i = 1, maxlen = 0; matches[i]; i++) {
767 match_len = strlen(matches[i]);
768 if (match_len > maxlen)
769 maxlen = match_len;
770 }
771 /* matches[1] through matches[i-1] are available */
772 matches_num = (size_t)(i - 1);
773
774 /* newline to get on next line from command line */
775 (void)fprintf(el->el_outfile, "\n");
776
777 /*
778 * If there are too many items, ask user for display
779 * confirmation.
780 */
781 if (matches_num > query_items) {
782 (void)fprintf(el->el_outfile,
783 "Display all %zu possibilities? (y or n) ",
784 matches_num);
785 (void)fflush(el->el_outfile);
786 if (getc(stdin) != 'y')
787 match_display = 0;
788 (void)fprintf(el->el_outfile, "\n");
789 }
790
791 if (match_display) {
792 /*
793 * Interface of this function requires the
794 * strings be matches[1..num-1] for compat.
795 * We have matches_num strings not counting
796 * the prefix in matches[0], so we need to
797 * add 1 to matches_num for the call.
798 */
799 fn_display_match_list(el, matches,
800 matches_num+1, maxlen, app_func);
801 }
802 retval = CC_REDISPLAY;
803 } else if (matches[0][0]) {
804 /*
805 * There was some common match, but the name was
806 * not complete enough. Next tab will print possible
807 * completions.
808 */
809 el_beep(el);
810 } else {
811 /* lcd is not a valid object - further specification */
812 /* is needed */
813 el_beep(el);
814 retval = CC_NORM;
815 }
816
817 /* free elements of array and the array itself */
818 out2:
819 for (i = 0; matches[i]; i++)
820 el_free(matches[i]);
821 el_free(matches);
822 matches = NULL;
823
824 out:
825 el_free(temp);
826 return retval;
827 }
828
829 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)830 fn_complete(EditLine *el,
831 char *(*complete_func)(const char *, int),
832 char **(*attempted_completion_function)(const char *, int, int),
833 const wchar_t *word_break, const wchar_t *special_prefixes,
834 const char *(*app_func)(const char *), size_t query_items,
835 int *completion_type, int *over, int *point, int *end)
836 {
837 return fn_complete2(el, complete_func, attempted_completion_function,
838 word_break, special_prefixes, app_func, query_items,
839 completion_type, over, point, end,
840 attempted_completion_function ? 0 : FN_QUOTE_MATCH);
841 }
842
843 /*
844 * el-compatible wrapper around rl_complete; needed for key binding
845 */
846 /* ARGSUSED */
847 unsigned char
_el_fn_complete(EditLine * el,int ch)848 _el_fn_complete(EditLine *el, int ch __attribute__((__unused__)))
849 {
850 return (unsigned char)fn_complete(el, NULL, NULL,
851 break_chars, NULL, NULL, (size_t)100,
852 NULL, NULL, NULL, NULL);
853 }
854
855 /*
856 * el-compatible wrapper around rl_complete; needed for key binding
857 */
858 /* ARGSUSED */
859 unsigned char
_el_fn_sh_complete(EditLine * el,int ch)860 _el_fn_sh_complete(EditLine *el, int ch)
861 {
862 return _el_fn_complete(el, ch);
863 }
864