i9e: Fix a prompt display issue
[paraslash.git] / interactive.c
1 /*
2 * Copyright (C) 2011-2013 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file interactive.c Readline abstraction for interactive sessions. */
8
9 #include <regex.h>
10 #include <stdbool.h>
11 #include <curses.h>
12 #include <readline/readline.h>
13 #include <readline/history.h>
14 #include <sys/ioctl.h>
15 #include <assert.h>
16 #include <signal.h>
17
18 #include "para.h"
19 #include "fd.h"
20 #include "buffer_tree.h"
21 #include "list.h"
22 #include "sched.h"
23 #include "interactive.h"
24 #include "string.h"
25 #include "error.h"
26
27 struct i9e_private {
28 struct i9e_client_info *ici;
29 FILE *stderr_stream;
30 int num_columns;
31 char empty_line[1000];
32 struct task task;
33 struct btr_node *stdout_btrn;
34 bool last_write_was_status;
35 bool line_handler_running;
36 bool input_eof;
37 bool caught_sigint;
38 bool caught_sigterm;
39 Keymap standard_km;
40 Keymap bare_km;
41 };
42 static struct i9e_private i9e_private, *i9ep = &i9e_private;
43
44 /**
45 * Return the error state of the i9e task.
46 *
47 * This is mainly useful for other tasks to tell whether the i9e task is still
48 * running.
49 *
50 * \return A negative return value of zero means the i9e task terminated. Only
51 * in this case it is safe to call ie9_close().
52 */
53 int i9e_get_error(void)
54 {
55 return i9ep->task.error;
56 }
57
58 static bool is_prefix(const char *partial, const char *full, size_t len)
59 {
60 if (len == 0)
61 len = strlen(partial);
62 return !strncmp(partial, full, len);
63 }
64
65 /*
66 * Generator function for command completion. STATE lets us know whether
67 * to start from scratch; without any state (i.e. STATE == 0), then we
68 * start at the top of the list.
69 */
70 static char *command_generator(const char *text, int state)
71 {
72 static int list_index, len;
73 const char *name;
74 struct i9e_client_info *ici = i9ep->ici;
75
76 rl_attempted_completion_over = 1; /* disable filename completion */
77 /*
78 * If this is a new word to complete, initialize now. This includes
79 * saving the length of TEXT for efficiency, and initializing the index
80 * variable to 0.
81 */
82 if (state == 0) {
83 list_index = 0;
84 len = strlen(text);
85 }
86 /* Return the next name which partially matches from the command list. */
87 while ((name = ici->completers[list_index].name)) {
88 list_index++;
89 if (is_prefix(text, name, len))
90 return para_strdup(name);
91 }
92 return NULL; /* no names matched */
93 }
94
95 static void reset_completion_result(struct i9e_completion_result *cr)
96 {
97 cr->dont_append_space = false;
98 cr->filename_completion_desired = false;
99 cr->matches = NULL;
100 }
101
102 static void create_matches(struct i9e_completion_info *ci,
103 struct i9e_completer *completers,
104 struct i9e_completion_result *cr)
105 {
106 int i, ret;
107
108 reset_completion_result(cr);
109
110 ret = create_argv(ci->buffer, " ", &ci->argv);
111 if (ret < 0 || !ci->argv[0])
112 return;
113
114 ci->argc = ret;
115 ci->word_num = compute_word_num(ci->buffer, " ", ci->point);
116 for (i = 0; completers[i].name; i++) {
117 if (strcmp(completers[i].name, ci->argv[0]) != 0)
118 continue;
119 completers[i].completer(ci, cr);
120 break;
121 }
122 PARA_DEBUG_LOG("current word: %d (%s)\n", ci->word_num,
123 ci->argv[ci->word_num]);
124 if (cr->matches)
125 for (i = 0; cr->matches[i]; i++)
126 PARA_DEBUG_LOG("match %d: %s\n", i, cr->matches[i]);
127 }
128
129 static char *completion_generator(const char *word, int state)
130 {
131 static int list_index;
132 static char **argv, **matches;
133 struct i9e_completer *completers = i9ep->ici->completers;
134 struct i9e_completion_info ci = {
135 .word = (char *)word,
136 .point = rl_point,
137 .buffer = rl_line_buffer,
138 };
139 struct i9e_completion_result cr = {.matches = NULL};
140
141 if (state != 0)
142 goto out;
143 /* clean up previous matches and set defaults */
144 free(matches);
145 matches = NULL;
146 free_argv(argv);
147 argv = NULL;
148 list_index = 0;
149 rl_completion_append_character = ' ';
150 rl_completion_suppress_append = false;
151 rl_attempted_completion_over = true;
152
153 create_matches(&ci, completers, &cr);
154
155 matches = cr.matches;
156 argv = ci.argv;
157 rl_completion_suppress_append = cr.dont_append_space;
158 rl_attempted_completion_over = !cr.filename_completion_desired;
159 out:
160 if (!matches)
161 return NULL;
162 return matches[list_index++];
163 }
164
165 /*
166 * Attempt to complete on the contents of TEXT. START and END bound the
167 * region of rl_line_buffer that contains the word to complete. TEXT is
168 * the word to complete. We can use the entire contents of rl_line_buffer
169 * in case we want to do some simple parsing. Return the array of matches,
170 * or NULL if there aren't any.
171 */
172 static char **i9e_completer(const char *text, int start, __a_unused int end)
173 {
174 struct i9e_client_info *ici = i9ep->ici;
175
176 if (!ici->completers)
177 return NULL;
178 /* Complete on command names if this is the first word in the line. */
179 if (start == 0)
180 return rl_completion_matches(text, command_generator);
181 return rl_completion_matches(text, completion_generator);
182 }
183
184 /**
185 * Prepare writing to stdout.
186 *
187 * \param producer The buffer tree node which produces output.
188 *
189 * The i9e subsystem maintains a buffer tree node which may be attached to
190 * another node which generates output (a "producer"). When attached, the i9e
191 * buffer tree node copies the buffers generated by the producer to stdout.
192 *
193 * This function attaches the i9e input queue to an output queue of \a
194 * producer.
195 *
196 * \return Standard.
197 */
198 void i9e_attach_to_stdout(struct btr_node *producer)
199 {
200 btr_remove_node(&i9ep->stdout_btrn);
201 i9ep->stdout_btrn = btr_new_node(&(struct btr_node_description)
202 EMBRACE(.name = "interactive_stdout", .parent = producer));
203 rl_set_keymap(i9ep->bare_km);
204 }
205
206 static void wipe_bottom_line(void)
207 {
208 char x[] = " ";
209 int n = i9ep->num_columns;
210
211 /*
212 * For reasons beyond my understanding, writing more than 68 characters
213 * here causes MacOS to mess up the terminal. Writing a line of spaces
214 * in smaller chunks works fine though. Weird.
215 */
216 fprintf(i9ep->stderr_stream, "\r");
217 while (n > 0) {
218 if (n >= sizeof(x)) {
219 fprintf(i9ep->stderr_stream, "%s", x);
220 n -= sizeof(x);
221 continue;
222 }
223 x[n] = '\0';
224 fprintf(i9ep->stderr_stream, "%s", x);
225 break;
226 }
227 fprintf(i9ep->stderr_stream, "\r");
228 }
229
230 /**
231 * Free all storage associated with a keymap.
232 *
233 * This function is not declared in the readline headers although the symbol is
234 * exported and the function is documented in the readline info file. So we
235 * have to declare it here.
236 *
237 * \param keymap The keymap to deallocate.
238 */
239 void rl_free_keymap(Keymap keymap);
240
241 /**
242 * Reset the terminal and save the in-memory command line history.
243 *
244 * This should be called before the caller exits.
245 */
246 void i9e_close(void)
247 {
248 char *hf = i9ep->ici->history_file;
249
250 rl_free_keymap(i9ep->bare_km);
251 rl_callback_handler_remove();
252 if (hf)
253 write_history(hf);
254 wipe_bottom_line();
255 }
256
257 static void clear_bottom_line(void)
258 {
259 int point;
260 char *text;
261
262 if (rl_point == 0 && rl_end == 0)
263 return wipe_bottom_line();
264 /*
265 * We might have a multi-line input that needs to be wiped here, so the
266 * simple printf("\r<space>\r") is insufficient. To workaround this, we
267 * remove the whole line, redisplay and restore the killed text.
268 */
269 point = rl_point;
270 text = rl_copy_text(0, rl_end);
271 rl_kill_full_line(0, 0);
272 rl_redisplay();
273 wipe_bottom_line(); /* wipe out the prompt */
274 rl_insert_text(text);
275 rl_point = point;
276 }
277
278 static bool input_available(void)
279 {
280 fd_set rfds;
281 struct timeval tv = {0, 0};
282 int ret;
283
284 FD_ZERO(&rfds);
285 FD_SET(i9ep->ici->fds[0], &rfds);
286 ret = para_select(1, &rfds, NULL, &tv);
287 return ret > 0;
288 }
289
290 static void i9e_line_handler(char *line)
291 {
292 int ret;
293 struct btr_node *dummy = btr_new_node(&(struct btr_node_description)
294 EMBRACE(.name = "dummy line handler"));
295 i9e_attach_to_stdout(dummy);
296
297 ret = i9ep->ici->line_handler(line);
298 if (ret < 0)
299 PARA_WARNING_LOG("%s\n", para_strerror(-ret));
300 rl_set_prompt("");
301 if (line) {
302 if (*line)
303 add_history(line);
304 free(line);
305 } else
306 i9ep->input_eof = true;
307 btr_remove_node(&dummy);
308 }
309
310 static int i9e_post_select(__a_unused struct sched *s, __a_unused struct task *t)
311 {
312 int ret;
313 struct i9e_client_info *ici = i9ep->ici;
314 char *buf;
315 size_t sz, consumed = 0;
316
317 ret = -E_I9E_EOF;
318 if (i9ep->input_eof)
319 goto rm_btrn;
320 ret = -E_I9E_TERM_RQ;
321 if (i9ep->caught_sigterm)
322 goto rm_btrn;
323 ret = 0;
324 if (i9ep->caught_sigint)
325 goto rm_btrn;
326 while (input_available())
327 rl_callback_read_char();
328 if (!i9ep->stdout_btrn)
329 goto out;
330 ret = btr_node_status(i9ep->stdout_btrn, 0, BTR_NT_LEAF);
331 if (ret < 0) {
332 ret = 0;
333 goto rm_btrn;
334 }
335 if (ret == 0)
336 goto out;
337 again:
338 sz = btr_next_buffer(i9ep->stdout_btrn, &buf);
339 if (sz == 0)
340 goto out;
341 if (i9ep->last_write_was_status)
342 fprintf(i9ep->stderr_stream, "\n");
343 i9ep->last_write_was_status = false;
344 ret = xwrite(ici->fds[1], buf, sz);
345 if (ret < 0)
346 goto rm_btrn;
347 btr_consume(i9ep->stdout_btrn, ret);
348 consumed += ret;
349 if (ret == sz && consumed < 10000)
350 goto again;
351 goto out;
352 rm_btrn:
353 if (i9ep->stdout_btrn) {
354 wipe_bottom_line();
355 btr_remove_node(&i9ep->stdout_btrn);
356 rl_set_keymap(i9ep->standard_km);
357 rl_set_prompt(i9ep->ici->prompt);
358 rl_redisplay();
359 }
360 if (ret < 0)
361 wipe_bottom_line();
362 out:
363 i9ep->caught_sigint = false;
364 return ret;
365 }
366
367 static void i9e_pre_select(struct sched *s, __a_unused struct task *t)
368 {
369 int ret;
370
371 if (i9ep->input_eof || i9ep->caught_sigint || i9ep->caught_sigterm) {
372 sched_min_delay(s);
373 return;
374 }
375 if (i9ep->stdout_btrn) {
376 ret = btr_node_status(i9ep->stdout_btrn, 0, BTR_NT_LEAF);
377 if (ret < 0) {
378 sched_min_delay(s);
379 return;
380 }
381 if (ret > 0)
382 para_fd_set(i9ep->ici->fds[1], &s->wfds, &s->max_fileno);
383 }
384 /*
385 * fd[0] might have been reset to blocking mode if our job was moved to
386 * the background due to CTRL-Z or SIGSTOP, so set the fd back to
387 * nonblocking mode.
388 */
389 ret = mark_fd_nonblocking(i9ep->ici->fds[0]);
390 if (ret < 0)
391 PARA_WARNING_LOG("set to nonblock failed: (fd0 %d, %s)\n",
392 i9ep->ici->fds[0], para_strerror(-ret));
393 para_fd_set(i9ep->ici->fds[0], &s->rfds, &s->max_fileno);
394 }
395
396 static void update_winsize(void)
397 {
398 struct winsize w;
399 int ret = ioctl(i9ep->ici->fds[2], TIOCGWINSZ, (char *)&w);
400
401 if (ret >= 0) {
402 assert(w.ws_col < sizeof(i9ep->empty_line));
403 i9ep->num_columns = w.ws_col;
404 } else
405 i9ep->num_columns = 80;
406
407 memset(i9ep->empty_line, ' ', i9ep->num_columns);
408 i9ep->empty_line[i9ep->num_columns] = '\0';
409 }
410
411 /**
412 * Defined key sequences are mapped to keys starting with this offset. I.e.
413 * pressing the first defined key sequence yields the key number \p KEY_OFFSET.
414 */
415 #define KEY_OFFSET 64
416
417 static int dispatch_key(__a_unused int count, int key)
418 {
419 int ret;
420
421 assert(key >= KEY_OFFSET);
422 ret = i9ep->ici->key_handler(key - KEY_OFFSET);
423 return ret < 0? ret : 0;
424 }
425
426 /**
427 * Register the i9e task and initialize readline.
428 *
429 * \param ici The i9e configuration parameters set by the caller.
430 * \param s The scheduler instance to add the i9e task to.
431 *
432 * The caller must allocate and initialize the structure \a ici points to.
433 *
434 * \return Standard.
435 * \sa \ref register_task().
436 */
437 int i9e_open(struct i9e_client_info *ici, struct sched *s)
438 {
439 int ret;
440
441 if (!isatty(ici->fds[0]))
442 return -E_I9E_SETUPTERM;
443 ret = mark_fd_nonblocking(ici->fds[0]);
444 if (ret < 0)
445 return ret;
446 ret = mark_fd_nonblocking(ici->fds[1]);
447 if (ret < 0)
448 return ret;
449 i9ep->task.pre_select = i9e_pre_select;
450 i9ep->task.post_select = i9e_post_select;
451 sprintf(i9ep->task.status, "i9e");
452 register_task(s, &i9ep->task);
453 rl_readline_name = "para_i9e";
454 rl_basic_word_break_characters = " ";
455 rl_attempted_completion_function = i9e_completer;
456 i9ep->ici = ici;
457 i9ep->stderr_stream = fdopen(ici->fds[2], "w");
458 setvbuf(i9ep->stderr_stream, NULL, _IONBF, 0);
459
460 i9ep->standard_km = rl_get_keymap();
461 i9ep->bare_km = rl_make_bare_keymap();
462 if (ici->bound_keyseqs) {
463 char *seq;
464 int i;
465 /* FIXME: This is an arbitrary constant. */
466 for (i = 0; i < 32 && (seq = ici->bound_keyseqs[i]); i++) {
467 char buf[2] = {KEY_OFFSET + i, '\0'};
468 /* readline needs an allocated buffer for the macro */
469 rl_generic_bind(ISMACR, seq, para_strdup(buf), i9ep->bare_km);
470 rl_bind_key_in_map(KEY_OFFSET + i, dispatch_key, i9ep->bare_km);
471 }
472 }
473 if (ici->history_file)
474 read_history(ici->history_file);
475 update_winsize();
476 if (ici->producer) {
477 rl_callback_handler_install("", i9e_line_handler);
478 i9e_attach_to_stdout(ici->producer);
479 rl_set_keymap(i9ep->bare_km);
480 } else
481 rl_callback_handler_install(i9ep->ici->prompt, i9e_line_handler);
482 return 1;
483 }
484
485 static void reset_line_state(void)
486 {
487 if (i9ep->stdout_btrn)
488 return;
489 rl_on_new_line();
490 rl_reset_line_state();
491 rl_forced_update_display();
492 }
493
494 /**
495 * The log function of the i9e subsystem.
496 *
497 * \param ll Severity log level.
498 * \param fmt Printf-like format string.
499 *
500 * This clears the bottom line of the terminal if necessary and writes the
501 * string given by \a fmt to fd[2], where fd[] is the array provided earlier in
502 * \ref i9e_open().
503 */
504 __printf_2_3 void i9e_log(int ll, const char* fmt,...)
505 {
506 va_list argp;
507
508 if (ll < i9ep->ici->loglevel)
509 return;
510 clear_bottom_line();
511 va_start(argp, fmt);
512 vfprintf(i9ep->stderr_stream, fmt, argp);
513 va_end(argp);
514 reset_line_state();
515 i9ep->last_write_was_status = false;
516 }
517
518 /**
519 * Print the current status to stderr.
520 *
521 * \param buf The text to print.
522 * \param len The number of bytes in \a buf.
523 *
524 * This clears the bottom line, moves to the beginning of the line and prints
525 * the given text. If the length of this text exceeds the width of the
526 * terminal, the text is shortened by leaving out a part in the middle.
527 */
528 void ie9_print_status_bar(char *buf, unsigned len)
529 {
530 size_t x = i9ep->num_columns, y = (x - 4) / 2;
531
532 assert(x >= 6);
533 if (len > x) {
534 buf[y] = '\0';
535 fprintf(i9ep->stderr_stream, "\r%s", buf);
536 fprintf(i9ep->stderr_stream, " .. ");
537 fprintf(i9ep->stderr_stream, "%s", buf + len - y);
538 } else {
539 char scratch[1000];
540
541 y = x - len;
542 scratch[0] = '\r';
543 strcpy(scratch + 1, buf);
544 memset(scratch + 1 + len, ' ', y);
545 scratch[1 + len + y] = '\r';
546 scratch[2 + len + y] = '\0';
547 fprintf(i9ep->stderr_stream, "\r%s", scratch);
548 }
549 i9ep->last_write_was_status = true;
550 }
551
552 /**
553 * Tell i9e that the caller received a signal.
554 *
555 * \param sig_num The number of the signal received.
556 *
557 * Currently the function only cares about \p SIGINT, but this may change.
558 */
559 void i9e_signal_dispatch(int sig_num)
560 {
561 if (sig_num == SIGWINCH)
562 return update_winsize();
563 if (sig_num == SIGINT) {
564 fprintf(i9ep->stderr_stream, "\n");
565 rl_replace_line ("", false /* clear_undo */);
566 reset_line_state();
567 i9ep->caught_sigint = true;
568 }
569 if (sig_num == SIGTERM)
570 i9ep->caught_sigterm = true;
571 }
572
573 /**
574 * Wrapper for select(2) which does not restart on interrupts.
575 *
576 * \param n \sa \ref para_select().
577 * \param readfds \sa \ref para_select().
578 * \param writefds \sa \ref para_select().
579 * \param timeout_tv \sa \ref para_select().
580 *
581 * \return \sa \ref para_select().
582 *
583 * The only difference between this function and \ref para_select() is that
584 * \ref i9e_select() returns zero if the select call returned \p EINTR.
585 */
586 int i9e_select(int n, fd_set *readfds, fd_set *writefds,
587 struct timeval *timeout_tv)
588 {
589 int ret = select(n, readfds, writefds, NULL, timeout_tv);
590
591 if (ret < 0) {
592 if (errno == EINTR)
593 ret = 0;
594 else
595 ret = -ERRNO_TO_PARA_ERROR(errno);
596 }
597 return ret;
598 }
599
600 /**
601 * Return the possible completions for a given word.
602 *
603 * \param word The word to complete.
604 * \param string_list All possible words in this context.
605 * \param result String list is returned here.
606 *
607 * This function never fails. If no completion was found, a string list of
608 * length zero is returned. In any case, the result must be freed by the caller
609 * using \ref free_argv().
610 *
611 * This function is independent of readline and may be called before
612 * i9e_open().
613 *
614 * \return The number of possible completions.
615 */
616 int i9e_extract_completions(const char *word, char **string_list,
617 char ***result)
618 {
619 char **matches = para_malloc(sizeof(char *));
620 int match_count = 0, matches_len = 1;
621 char **p;
622 int len = strlen(word);
623
624 for (p = string_list; *p; p++) {
625 if (!is_prefix(word, *p, len))
626 continue;
627 match_count++;
628 if (match_count >= matches_len) {
629 matches_len *= 2;
630 matches = para_realloc(matches,
631 matches_len * sizeof(char *));
632 }
633 matches[match_count - 1] = para_strdup(*p);
634 }
635 matches[match_count] = NULL;
636 *result = matches;
637 return match_count;
638 }
639
640 /**
641 * Return the list of partially matching words.
642 *
643 * \param word The command to complete.
644 * \param completers The array containing all command names.
645 *
646 * This is similar to \ref i9e_extract_completions(), but completes on the
647 * command names in \a completers.
648 *
649 * \return See \ref i9e_extract_completions().
650 */
651 char **i9e_complete_commands(const char *word, struct i9e_completer *completers)
652 {
653 char **matches;
654 const char *cmd;
655 int i, match_count, len = strlen(word);
656
657 /*
658 * In contrast to completing against an arbitrary string list, here we
659 * know all possible completions and expect that there will not be many
660 * of them. So it should be OK to iterate twice over all commands which
661 * simplifies the code a bit.
662 */
663 for (i = 0, match_count = 0; (cmd = completers[i].name); i++) {
664 if (is_prefix(word, cmd, len))
665 match_count++;
666 }
667 matches = para_malloc((match_count + 1) * sizeof(*matches));
668 for (i = 0, match_count = 0; (cmd = completers[i].name); i++)
669 if (is_prefix(word, cmd, len))
670 matches[match_count++] = para_strdup(cmd);
671 matches[match_count] = NULL;
672 return matches;
673 }
674
675 /**
676 * Complete according to the given options.
677 *
678 * \param opts All available options.
679 * \param ci Information which was passed to the completer.
680 * \param cr Result pointer.
681 *
682 * This convenience helper can be used to complete an option. The array of all
683 * possible options is passed as the first argument. Flags, i.e. options
684 * without an argument, are expected to be listed as strings of type "-X" in \a
685 * opts while options which require an argument should be passed with a
686 * trailing "=" character like "-X=".
687 *
688 * If the word can be uniquely completed to a flag option, an additional space
689 * character is appended to the output. For non-flag options no space character
690 * is appended.
691 */
692 void i9e_complete_option(char **opts, struct i9e_completion_info *ci,
693 struct i9e_completion_result *cr)
694 {
695 int num_matches;
696
697 num_matches = i9e_extract_completions(ci->word, opts, &cr->matches);
698 if (num_matches == 1) {
699 char *opt = cr->matches[0];
700 char c = opt[strlen(opt) - 1];
701 if (c == '=')
702 cr->dont_append_space = true;
703 }
704 }
705
706 /**
707 * Print possible completions to stdout.
708 *
709 * \param completers The array of completion functions.
710 *
711 * At the end of the output a line starting with "-o=", followed by the
712 * (possibly empty) list of completion options is printed. Currently, the only
713 * two completion options are "nospace" and "filenames". The former indicates
714 * that no space should be appended even for a unique match while the latter
715 * indicates that usual filename completion should be performed in addition to
716 * the previously printed options.
717 *
718 * \return Standard.
719 */
720 int i9e_print_completions(struct i9e_completer *completers)
721 {
722 struct i9e_completion_result cr;
723 struct i9e_completion_info ci;
724 char *buf;
725 const char *end, *p;
726 int i, n, ret;
727
728 reset_completion_result(&cr);
729 buf = getenv("COMP_POINT");
730 ci.point = buf? atoi(buf) : 0;
731 ci.buffer = para_strdup(getenv("COMP_LINE"));
732
733 ci.argc = create_argv(ci.buffer, " ", &ci.argv);
734 ci.word_num = compute_word_num(ci.buffer, " ", ci.point);
735
736 end = ci.buffer + ci.point;
737 for (p = end; p > ci.buffer && *p != ' '; p--)
738 ; /* nothing */
739 if (*p == ' ')
740 p++;
741
742 n = end - p + 1;
743 ci.word = para_malloc(n + 1);
744 strncpy(ci.word, p, n);
745 ci.word[n] = '\0';
746
747 PARA_DEBUG_LOG("line: %s, point: %d (%c), wordnum: %d, word: %s\n",
748 ci.buffer, ci.point, ci.buffer[ci.point], ci.word_num, ci.word);
749 if (ci.word_num == 0)
750 cr.matches = i9e_complete_commands(ci.word, completers);
751 else
752 create_matches(&ci, completers, &cr);
753 ret = 0;
754 if (cr.matches && cr.matches[0]) {
755 for (i = 0; cr.matches[i]; i++)
756 printf("%s\n", cr.matches[i]);
757 ret = 1;
758 }
759 printf("-o=");
760 if (cr.dont_append_space)
761 printf("nospace");
762 if (cr.filename_completion_desired)
763 printf(",filenames");
764 printf("\n");
765 free_argv(cr.matches);
766 free_argv(ci.argv);
767 free(ci.buffer);
768 free(ci.word);
769 return ret;
770 }