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1 | /* bashline.c -- Bash's interface to the readline library. */ | |
2 | ||
3 | /* Copyright (C) 1987,1991 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
7 | Bash is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 1, or (at your option) | |
10 | any later version. | |
11 | ||
12 | Bash is distributed in the hope that it will be useful, but WITHOUT | |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with Bash; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | #include "config.h" | |
22 | ||
23 | #if defined (READLINE) | |
24 | ||
25 | #include "bashtypes.h" | |
26 | #include "posixstat.h" | |
27 | ||
28 | #if defined (HAVE_UNISTD_H) | |
29 | # include <unistd.h> | |
30 | #endif | |
31 | ||
32 | #include <stdio.h> | |
33 | #include "bashansi.h" | |
34 | #include "shell.h" | |
35 | #include "builtins.h" | |
36 | #include "bashhist.h" | |
37 | #include "bashline.h" | |
38 | #include "execute_cmd.h" | |
39 | #include "pathexp.h" | |
40 | #include "builtins/common.h" | |
41 | #include <readline/rlconf.h> | |
42 | #include <readline/readline.h> | |
43 | #include <readline/history.h> | |
44 | ||
45 | #include <glob/glob.h> | |
46 | ||
47 | #if defined (ALIAS) | |
48 | # include "alias.h" | |
49 | #endif | |
50 | ||
51 | #if defined (BRACE_COMPLETION) | |
52 | extern void bash_brace_completion (); | |
53 | #endif /* BRACE_COMPLETION */ | |
54 | ||
55 | /* Functions bound to keys in Readline for Bash users. */ | |
56 | static void shell_expand_line (); | |
57 | static void display_shell_version (), operate_and_get_next (); | |
58 | static void history_expand_line (), bash_ignore_filenames (); | |
59 | #ifdef ALIAS | |
60 | static void alias_expand_line (); | |
61 | #endif | |
62 | static void history_and_alias_expand_line (); | |
63 | static void cleanup_expansion_error (), set_up_new_line (); | |
64 | ||
65 | /* Helper functions for Readline. */ | |
66 | static int bash_directory_completion_hook (); | |
67 | static void filename_completion_ignore (); | |
68 | static void bash_push_line (); | |
69 | ||
70 | static char **attempt_shell_completion (); | |
71 | static char *variable_completion_function (); | |
72 | static char *hostname_completion_function (); | |
73 | static char *command_word_completion_function (); | |
74 | static char *command_subst_completion_function (); | |
75 | static void dynamic_complete_history (); | |
76 | ||
77 | static char *glob_complete_word (); | |
78 | static void bash_glob_expand_word (); | |
79 | static void bash_glob_list_expansions (); | |
80 | ||
81 | static void snarf_hosts_from_file (), add_host_name (); | |
82 | ||
83 | static char *bash_dequote_filename (); | |
84 | static char *bash_quote_filename (); | |
85 | ||
86 | #if defined (ALIAS) | |
87 | static int posix_edit_macros (); | |
88 | #endif | |
89 | ||
90 | /* Variables used here but defined in other files. */ | |
91 | extern int posixly_correct, no_symbolic_links; | |
92 | extern int rl_explicit_arg; | |
93 | extern char *current_prompt_string, *ps1_prompt; | |
94 | extern STRING_INT_ALIST word_token_alist[]; | |
95 | extern Function *rl_last_func; | |
96 | extern int rl_filename_completion_desired; | |
97 | ||
98 | /* Helper functions from subst.c */ | |
99 | extern int char_is_quoted (); | |
100 | extern int unclosed_pair (); | |
101 | ||
102 | /* SPECIFIC_COMPLETION_FUNCTIONS specifies that we have individual | |
103 | completion functions which indicate what type of completion should be | |
104 | done (at or before point) that can be bound to key sequences with | |
105 | the readline library. */ | |
106 | #define SPECIFIC_COMPLETION_FUNCTIONS | |
107 | ||
108 | #if defined (SPECIFIC_COMPLETION_FUNCTIONS) | |
109 | static void bash_specific_completion (); | |
110 | static void bash_complete_filename (), bash_possible_filename_completions (); | |
111 | static void bash_complete_filename_internal (); | |
112 | static void bash_complete_username (), bash_possible_username_completions (); | |
113 | static void bash_complete_username_internal (); | |
114 | static void bash_complete_hostname (), bash_possible_hostname_completions (); | |
115 | static void bash_complete_hostname_internal (); | |
116 | static void bash_complete_variable (), bash_possible_variable_completions (); | |
117 | static void bash_complete_variable_internal (); | |
118 | static void bash_complete_command (), bash_possible_command_completions (); | |
119 | static void bash_complete_command_internal (); | |
120 | #endif /* SPECIFIC_COMPLETION_FUNCTIONS */ | |
121 | ||
122 | #if defined (VI_MODE) | |
123 | static void vi_edit_and_execute_command (); | |
124 | #endif | |
125 | ||
126 | /* Non-zero once initalize_readline () has been called. */ | |
127 | int bash_readline_initialized = 0; | |
128 | ||
129 | /* If non-zero, we do hostname completion, breaking words at `@' and | |
130 | trying to complete the stuff after the `@' from our own internal | |
131 | host list. */ | |
132 | int perform_hostname_completion = 1; | |
133 | ||
134 | static char *bash_completer_word_break_characters = " \t\n\"'@><=;|&(:"; | |
135 | static char *bash_nohostname_word_break_characters = " \t\n\"'><=;|&(:"; | |
136 | ||
137 | static Function *old_rl_startup_hook = (Function *) NULL; | |
138 | ||
139 | /* What kind of quoting is performed by bash_quote_filename: | |
140 | COMPLETE_DQUOTE = double-quoting the filename | |
141 | COMPLETE_SQUOTE = single_quoting the filename | |
142 | COMPLETE_BSQUOTE = backslash-quoting special chars in the filename | |
143 | */ | |
144 | #define COMPLETE_DQUOTE 1 | |
145 | #define COMPLETE_SQUOTE 2 | |
146 | #define COMPLETE_BSQUOTE 3 | |
147 | static int completion_quoting_style = COMPLETE_BSQUOTE; | |
148 | ||
149 | /* Change the readline VI-mode keymaps into or out of Posix.2 compliance. | |
150 | Called when the shell is put into or out of `posix' mode. */ | |
151 | void | |
152 | posix_readline_initialize (on_or_off) | |
153 | int on_or_off; | |
154 | { | |
155 | if (on_or_off) | |
156 | rl_variable_bind ("comment-begin", "#"); | |
157 | #if defined (VI_MODE) | |
158 | rl_bind_key_in_map (CTRL('I'), on_or_off ? rl_insert : rl_complete, vi_insertion_keymap); | |
159 | #endif | |
160 | } | |
161 | ||
162 | void | |
163 | enable_hostname_completion (on_or_off) | |
164 | int on_or_off; | |
165 | { | |
166 | if (on_or_off) | |
167 | { | |
168 | perform_hostname_completion = 1; | |
169 | rl_special_prefixes = "$@"; | |
170 | rl_completer_word_break_characters = bash_completer_word_break_characters; | |
171 | } | |
172 | else | |
173 | { | |
174 | perform_hostname_completion = 0; | |
175 | rl_special_prefixes = "$"; | |
176 | rl_completer_word_break_characters = bash_nohostname_word_break_characters; | |
177 | } | |
178 | } | |
179 | ||
180 | /* Called once from parse.y if we are going to use readline. */ | |
181 | void | |
182 | initialize_readline () | |
183 | { | |
184 | if (bash_readline_initialized) | |
185 | return; | |
186 | ||
187 | rl_terminal_name = get_string_value ("TERM"); | |
188 | rl_instream = stdin; | |
189 | rl_outstream = stderr; | |
190 | ||
191 | /* Allow conditional parsing of the ~/.inputrc file. */ | |
192 | rl_readline_name = "Bash"; | |
193 | ||
194 | /* Bind up our special shell functions. */ | |
195 | rl_add_defun ("shell-expand-line", (Function *)shell_expand_line, -1); | |
196 | rl_bind_key_in_map (CTRL('E'), (Function *)shell_expand_line, emacs_meta_keymap); | |
197 | ||
198 | /* Bind up our special shell functions. */ | |
199 | rl_add_defun ("history-expand-line", (Function *)history_expand_line, -1); | |
200 | rl_bind_key_in_map ('^', (Function *)history_expand_line, emacs_meta_keymap); | |
201 | ||
202 | #ifdef ALIAS | |
203 | rl_add_defun ("alias-expand-line", (Function *)alias_expand_line, -1); | |
204 | rl_add_defun ("history-and-alias-expand-line", (Function *)history_and_alias_expand_line, -1); | |
205 | #endif | |
206 | ||
207 | /* Backwards compatibility. */ | |
208 | rl_add_defun ("insert-last-argument", rl_yank_last_arg, -1); | |
209 | ||
210 | rl_add_defun | |
211 | ("operate-and-get-next", (Function *)operate_and_get_next, CTRL('O')); | |
212 | ||
213 | rl_add_defun | |
214 | ("display-shell-version", (Function *)display_shell_version, -1); | |
215 | rl_bind_key_in_map | |
216 | (CTRL ('V'), (Function *)display_shell_version, emacs_ctlx_keymap); | |
217 | ||
218 | /* In Bash, the user can switch editing modes with "set -o [vi emacs]", | |
219 | so it is not necessary to allow C-M-j for context switching. Turn | |
220 | off this occasionally confusing behaviour. */ | |
221 | rl_unbind_key_in_map (CTRL('J'), emacs_meta_keymap); | |
222 | rl_unbind_key_in_map (CTRL('M'), emacs_meta_keymap); | |
223 | #if defined (VI_MODE) | |
224 | rl_unbind_key_in_map (CTRL('E'), vi_movement_keymap); | |
225 | #endif | |
226 | ||
227 | #if defined (BRACE_COMPLETION) | |
228 | rl_add_defun ("complete-into-braces", bash_brace_completion, -1); | |
229 | rl_bind_key_in_map ('{', bash_brace_completion, emacs_meta_keymap); | |
230 | #endif /* BRACE_COMPLETION */ | |
231 | ||
232 | #if defined (SPECIFIC_COMPLETION_FUNCTIONS) | |
233 | rl_add_defun ("complete-filename", bash_complete_filename, -1); | |
234 | rl_bind_key_in_map ('/', bash_complete_filename, emacs_meta_keymap); | |
235 | rl_add_defun ("possible-filename-completions", | |
236 | bash_possible_filename_completions, -1); | |
237 | rl_bind_key_in_map ('/', bash_possible_filename_completions, emacs_ctlx_keymap); | |
238 | ||
239 | rl_add_defun ("complete-username", bash_complete_username, -1); | |
240 | rl_bind_key_in_map ('~', bash_complete_username, emacs_meta_keymap); | |
241 | rl_add_defun ("possible-username-completions", | |
242 | bash_possible_username_completions, -1); | |
243 | rl_bind_key_in_map ('~', bash_possible_username_completions, emacs_ctlx_keymap); | |
244 | ||
245 | rl_add_defun ("complete-hostname", bash_complete_hostname, -1); | |
246 | rl_bind_key_in_map ('@', bash_complete_hostname, emacs_meta_keymap); | |
247 | rl_add_defun ("possible-hostname-completions", | |
248 | bash_possible_hostname_completions, -1); | |
249 | rl_bind_key_in_map ('@', bash_possible_hostname_completions, emacs_ctlx_keymap); | |
250 | ||
251 | rl_add_defun ("complete-variable", bash_complete_variable, -1); | |
252 | rl_bind_key_in_map ('$', bash_complete_variable, emacs_meta_keymap); | |
253 | rl_add_defun ("possible-variable-completions", | |
254 | bash_possible_variable_completions, -1); | |
255 | rl_bind_key_in_map ('$', bash_possible_variable_completions, emacs_ctlx_keymap); | |
256 | ||
257 | rl_add_defun ("complete-command", bash_complete_command, -1); | |
258 | rl_bind_key_in_map ('!', bash_complete_command, emacs_meta_keymap); | |
259 | rl_add_defun ("possible-command-completions", | |
260 | bash_possible_command_completions, -1); | |
261 | rl_bind_key_in_map ('!', bash_possible_command_completions, emacs_ctlx_keymap); | |
262 | ||
263 | rl_add_defun ("glob-expand-word", bash_glob_expand_word, -1); | |
264 | rl_add_defun ("glob-list-expansions", bash_glob_list_expansions, -1); | |
265 | rl_bind_key_in_map ('*', bash_glob_expand_word, emacs_ctlx_keymap); | |
266 | rl_bind_key_in_map ('g', bash_glob_list_expansions, emacs_ctlx_keymap); | |
267 | ||
268 | #endif /* SPECIFIC_COMPLETION_FUNCTIONS */ | |
269 | ||
270 | rl_add_defun ("dynamic-complete-history", dynamic_complete_history, -1); | |
271 | rl_bind_key_in_map (TAB, dynamic_complete_history, emacs_meta_keymap); | |
272 | ||
273 | /* Tell the completer that we want a crack first. */ | |
274 | rl_attempted_completion_function = (CPPFunction *)attempt_shell_completion; | |
275 | ||
276 | /* Tell the completer that we might want to follow symbolic links or | |
277 | do other expansion on directory names. */ | |
278 | rl_directory_completion_hook = bash_directory_completion_hook; | |
279 | ||
280 | /* Tell the filename completer we want a chance to ignore some names. */ | |
281 | rl_ignore_some_completions_function = (Function *)filename_completion_ignore; | |
282 | ||
283 | #if defined (VI_MODE) | |
284 | rl_bind_key_in_map ('v', vi_edit_and_execute_command, vi_movement_keymap); | |
285 | # if defined (ALIAS) | |
286 | rl_bind_key_in_map ('@', posix_edit_macros, vi_movement_keymap); | |
287 | # endif | |
288 | #endif | |
289 | ||
290 | rl_completer_quote_characters = "'\""; | |
291 | ||
292 | /* This sets rl_completer_word_break_characters and rl_special_prefixes | |
293 | to the appropriate values, depending on whether or not hostname | |
294 | completion is enabled. */ | |
295 | enable_hostname_completion (perform_hostname_completion); | |
296 | ||
297 | /* characters that need to be quoted when appearing in filenames. */ | |
298 | rl_filename_quote_characters = " \t\n\\\"'@<>=;|&()#$`?*[!:"; | |
299 | rl_filename_quoting_function = bash_quote_filename; | |
300 | rl_filename_dequoting_function = bash_dequote_filename; | |
301 | rl_char_is_quoted_p = char_is_quoted; | |
302 | ||
303 | if (posixly_correct) | |
304 | posix_readline_initialize (1); | |
305 | ||
306 | bash_readline_initialized = 1; | |
307 | } | |
308 | ||
309 | /* On Sun systems at least, rl_attempted_completion_function can end up | |
310 | getting set to NULL, and rl_completion_entry_function set to do command | |
311 | word completion if Bash is interrupted while trying to complete a command | |
312 | word. This just resets all the completion functions to the right thing. | |
313 | It's called from throw_to_top_level(). */ | |
314 | void | |
315 | bashline_reinitialize () | |
316 | { | |
317 | tilde_initialize (); | |
318 | rl_attempted_completion_function = attempt_shell_completion; | |
319 | rl_completion_entry_function = (Function *)NULL; | |
320 | rl_directory_completion_hook = bash_directory_completion_hook; | |
321 | rl_ignore_some_completions_function = (Function *)filename_completion_ignore; | |
322 | } | |
323 | ||
324 | /* Contains the line to push into readline. */ | |
325 | static char *push_to_readline = (char *)NULL; | |
326 | ||
327 | /* Push the contents of push_to_readline into the | |
328 | readline buffer. */ | |
329 | static void | |
330 | bash_push_line () | |
331 | { | |
332 | if (push_to_readline) | |
333 | { | |
334 | rl_insert_text (push_to_readline); | |
335 | free (push_to_readline); | |
336 | push_to_readline = (char *)NULL; | |
337 | rl_startup_hook = old_rl_startup_hook; | |
338 | } | |
339 | } | |
340 | ||
341 | /* Call this to set the initial text for the next line to read | |
342 | from readline. */ | |
343 | int | |
344 | bash_re_edit (line) | |
345 | char *line; | |
346 | { | |
347 | FREE (push_to_readline); | |
348 | ||
349 | push_to_readline = savestring (line); | |
350 | old_rl_startup_hook = rl_startup_hook; | |
351 | rl_startup_hook = (Function *)bash_push_line; | |
352 | ||
353 | return (0); | |
354 | } | |
355 | ||
356 | static void | |
357 | display_shell_version (count, c) | |
358 | int count, c; | |
359 | { | |
360 | crlf (); | |
361 | show_shell_version (0); | |
362 | putc ('\r', rl_outstream); | |
363 | fflush (rl_outstream); | |
364 | rl_on_new_line (); | |
365 | rl_redisplay (); | |
366 | } | |
367 | ||
368 | /* **************************************************************** */ | |
369 | /* */ | |
370 | /* Readline Stuff */ | |
371 | /* */ | |
372 | /* **************************************************************** */ | |
373 | ||
374 | /* If the user requests hostname completion, then simply build a list | |
375 | of hosts, and complete from that forever more. */ | |
376 | ||
377 | /* The kept list of hostnames. */ | |
378 | static char **hostname_list = (char **)NULL; | |
379 | ||
380 | /* The physical size of the above list. */ | |
381 | static int hostname_list_size; | |
382 | ||
383 | /* The number of hostnames in the above list. */ | |
384 | static int hostname_list_length; | |
385 | ||
386 | /* Whether or not HOSTNAME_LIST has been initialized. */ | |
387 | int hostname_list_initialized = 0; | |
388 | ||
389 | /* Initialize the hostname completion table. */ | |
390 | static void | |
391 | initialize_hostname_list () | |
392 | { | |
393 | char *temp; | |
394 | ||
395 | temp = get_string_value ("HOSTFILE"); | |
396 | if (temp == 0) | |
397 | temp = get_string_value ("hostname_completion_file"); | |
398 | if (temp == 0) | |
399 | temp = DEFAULT_HOSTS_FILE; | |
400 | ||
401 | snarf_hosts_from_file (temp); | |
402 | ||
403 | if (hostname_list) | |
404 | hostname_list_initialized++; | |
405 | } | |
406 | ||
407 | /* Add NAME to the list of hosts. */ | |
408 | static void | |
409 | add_host_name (name) | |
410 | char *name; | |
411 | { | |
412 | long size; | |
413 | ||
414 | if (hostname_list_length + 2 > hostname_list_size) | |
415 | { | |
416 | hostname_list_size = (hostname_list_size + 32) - (hostname_list_size % 32); | |
417 | size = hostname_list_size * sizeof (char *); | |
418 | hostname_list = (char **)xrealloc (hostname_list, size); | |
419 | } | |
420 | ||
421 | hostname_list[hostname_list_length++] = savestring (name); | |
422 | hostname_list[hostname_list_length] = (char *)NULL; | |
423 | } | |
424 | ||
425 | #define cr_whitespace(c) ((c) == '\r' || (c) == '\n' || whitespace(c)) | |
426 | ||
427 | static void | |
428 | snarf_hosts_from_file (filename) | |
429 | char *filename; | |
430 | { | |
431 | FILE *file; | |
432 | char *temp, buffer[256], name[256]; | |
433 | register int i, start; | |
434 | ||
435 | file = fopen (filename, "r"); | |
436 | if (file == 0) | |
437 | return; | |
438 | ||
439 | while (temp = fgets (buffer, 255, file)) | |
440 | { | |
441 | /* Skip to first character. */ | |
442 | for (i = 0; buffer[i] && cr_whitespace (buffer[i]); i++) | |
443 | ; | |
444 | ||
445 | /* If comment or blank line, ignore. */ | |
446 | if (buffer[i] == '\0' || buffer[i] == '#') | |
447 | continue; | |
448 | ||
449 | /* If `preprocessor' directive, do the include. */ | |
450 | if (strncmp (buffer + i, "$include ", 9) == 0) | |
451 | { | |
452 | char *incfile, *t; | |
453 | ||
454 | /* Find start of filename. */ | |
455 | for (incfile = buffer + i + 9; *incfile && whitespace (*incfile); incfile++) | |
456 | ; | |
457 | ||
458 | /* Find end of filename. */ | |
459 | for (t = incfile; *t && cr_whitespace (*t) == 0; t++) | |
460 | ; | |
461 | ||
462 | *t = '\0'; | |
463 | ||
464 | snarf_hosts_from_file (incfile); | |
465 | continue; | |
466 | } | |
467 | ||
468 | /* Skip internet address if present. */ | |
469 | if (digit (buffer[i])) | |
470 | for (; buffer[i] && cr_whitespace (buffer[i]) == 0; i++); | |
471 | ||
472 | /* Gobble up names. Each name is separated with whitespace. */ | |
473 | while (buffer[i]) | |
474 | { | |
475 | for (; cr_whitespace (buffer[i]); i++) | |
476 | ; | |
477 | if (buffer[i] == '\0' || buffer[i] == '#') | |
478 | break; | |
479 | ||
480 | /* Isolate the current word. */ | |
481 | for (start = i; buffer[i] && cr_whitespace (buffer[i]) == 0; i++) | |
482 | ; | |
483 | if (i == start) | |
484 | continue; | |
485 | strncpy (name, buffer + start, i - start); | |
486 | name[i - start] = '\0'; | |
487 | add_host_name (name); | |
488 | } | |
489 | } | |
490 | fclose (file); | |
491 | } | |
492 | ||
493 | /* Return a NULL terminated list of hostnames which begin with TEXT. | |
494 | Initialize the hostname list the first time if neccessary. | |
495 | The array is malloc ()'ed, but not the individual strings. */ | |
496 | static char ** | |
497 | hostnames_matching (text) | |
498 | char *text; | |
499 | { | |
500 | register int i, len, nmatch, rsize; | |
501 | char **result; | |
502 | ||
503 | if (hostname_list_initialized == 0) | |
504 | initialize_hostname_list (); | |
505 | ||
506 | if (hostname_list_initialized == 0) | |
507 | return ((char **)NULL); | |
508 | ||
509 | /* Special case. If TEXT consists of nothing, then the whole list is | |
510 | what is desired. */ | |
511 | if (*text == '\0') | |
512 | { | |
513 | result = (char **)xmalloc ((1 + hostname_list_length) * sizeof (char *)); | |
514 | for (i = 0; i < hostname_list_length; i++) | |
515 | result[i] = hostname_list[i]; | |
516 | result[i] = (char *)NULL; | |
517 | return (result); | |
518 | } | |
519 | ||
520 | /* Scan until found, or failure. */ | |
521 | len = strlen (text); | |
522 | result = (char **)NULL; | |
523 | for (i = nmatch = rsize = 0; i < hostname_list_length; i++) | |
524 | { | |
525 | if (STREQN (text, hostname_list[i], len) == 0) | |
526 | continue; | |
527 | ||
528 | /* OK, it matches. Add it to the list. */ | |
529 | if (nmatch >= rsize) | |
530 | { | |
531 | rsize = (rsize + 16) - (rsize % 16); | |
532 | result = (char **)xrealloc (result, rsize * sizeof (char *)); | |
533 | } | |
534 | ||
535 | result[nmatch++] = hostname_list[i]; | |
536 | } | |
537 | if (nmatch) | |
538 | result[nmatch] = (char *)NULL; | |
539 | return (result); | |
540 | } | |
541 | ||
542 | /* The equivalent of the Korn shell C-o operate-and-get-next-history-line | |
543 | editing command. */ | |
544 | static int saved_history_line_to_use = -1; | |
545 | ||
546 | static void | |
547 | set_saved_history () | |
548 | { | |
549 | if (saved_history_line_to_use >= 0) | |
550 | rl_get_previous_history (history_length - saved_history_line_to_use); | |
551 | saved_history_line_to_use = -1; | |
552 | rl_startup_hook = old_rl_startup_hook; | |
553 | } | |
554 | ||
555 | static void | |
556 | operate_and_get_next (count, c) | |
557 | int count, c; | |
558 | { | |
559 | int where; | |
560 | ||
561 | /* Accept the current line. */ | |
562 | rl_newline (); | |
563 | ||
564 | /* Find the current line, and find the next line to use. */ | |
565 | where = where_history (); | |
566 | ||
567 | if ((history_is_stifled () && (history_length >= max_input_history)) || | |
568 | (where >= history_length - 1)) | |
569 | saved_history_line_to_use = where; | |
570 | else | |
571 | saved_history_line_to_use = where + 1; | |
572 | ||
573 | old_rl_startup_hook = rl_startup_hook; | |
574 | rl_startup_hook = (Function *)set_saved_history; | |
575 | } | |
576 | ||
577 | #if defined (VI_MODE) | |
578 | /* This vi mode command causes VI_EDIT_COMMAND to be run on the current | |
579 | command being entered (if no explicit argument is given), otherwise on | |
580 | a command from the history file. */ | |
581 | ||
582 | #define VI_EDIT_COMMAND "fc -e ${VISUAL:-${EDITOR:-vi}}" | |
583 | ||
584 | static void | |
585 | vi_edit_and_execute_command (count, c) | |
586 | int count, c; | |
587 | { | |
588 | char *command; | |
589 | ||
590 | /* Accept the current line. */ | |
591 | rl_newline (); | |
592 | ||
593 | if (rl_explicit_arg) | |
594 | { | |
595 | command = xmalloc (strlen (VI_EDIT_COMMAND) + 8); | |
596 | sprintf (command, "%s %d", VI_EDIT_COMMAND, count); | |
597 | } | |
598 | else | |
599 | { | |
600 | /* Take the command we were just editing, add it to the history file, | |
601 | then call fc to operate on it. We have to add a dummy command to | |
602 | the end of the history because fc ignores the last command (assumes | |
603 | it's supposed to deal with the command before the `fc'). */ | |
604 | using_history (); | |
605 | bash_add_history (rl_line_buffer); | |
606 | bash_add_history (""); | |
607 | history_lines_this_session++; | |
608 | using_history (); | |
609 | command = savestring (VI_EDIT_COMMAND); | |
610 | } | |
611 | parse_and_execute (command, "v", SEVAL_NOHIST); | |
612 | rl_line_buffer[0] = '\0'; /* XXX */ | |
613 | } | |
614 | #endif /* VI_MODE */ | |
615 | ||
616 | #if defined (ALIAS) | |
617 | static int | |
618 | posix_edit_macros (count, key) | |
619 | int count, key; | |
620 | { | |
621 | int c; | |
622 | char alias_name[3], *alias_value, *macro; | |
623 | ||
624 | c = rl_read_key (); | |
625 | alias_name[0] = '_'; | |
626 | alias_name[1] = c; | |
627 | alias_name[2] = '\0'; | |
628 | ||
629 | alias_value = get_alias_value (alias_name); | |
630 | if (alias_value && *alias_value) | |
631 | { | |
632 | macro = savestring (alias_value); | |
633 | rl_push_macro_input (macro); | |
634 | } | |
635 | return 0; | |
636 | } | |
637 | #endif | |
638 | ||
639 | /* **************************************************************** */ | |
640 | /* */ | |
641 | /* How To Do Shell Completion */ | |
642 | /* */ | |
643 | /* **************************************************************** */ | |
644 | ||
645 | /* Do some completion on TEXT. The indices of TEXT in RL_LINE_BUFFER are | |
646 | at START and END. Return an array of matches, or NULL if none. */ | |
647 | static char ** | |
648 | attempt_shell_completion (text, start, end) | |
649 | char *text; | |
650 | int start, end; | |
651 | { | |
652 | int in_command_position, ti; | |
653 | char **matches, *command_separator_chars; | |
654 | ||
655 | command_separator_chars = ";|&{(`"; | |
656 | matches = (char **)NULL; | |
657 | rl_ignore_some_completions_function = (Function *)filename_completion_ignore; | |
658 | ||
659 | /* Determine if this could be a command word. It is if it appears at | |
660 | the start of the line (ignoring preceding whitespace), or if it | |
661 | appears after a character that separates commands. It cannot be a | |
662 | command word if we aren't at the top-level prompt. */ | |
663 | ti = start - 1; | |
664 | ||
665 | while ((ti > -1) && (whitespace (rl_line_buffer[ti]))) | |
666 | ti--; | |
667 | ||
668 | in_command_position = 0; | |
669 | if (ti < 0) | |
670 | { | |
671 | /* Only do command completion at the start of a line when we | |
672 | are prompting at the top level. */ | |
673 | if (current_prompt_string == ps1_prompt) | |
674 | in_command_position++; | |
675 | } | |
676 | else if (member (rl_line_buffer[ti], command_separator_chars)) | |
677 | { | |
678 | register int this_char, prev_char; | |
679 | ||
680 | in_command_position++; | |
681 | ||
682 | /* Handle the two character tokens `>&', `<&', and `>|'. | |
683 | We are not in a command position after one of these. */ | |
684 | this_char = rl_line_buffer[ti]; | |
685 | prev_char = rl_line_buffer[ti - 1]; | |
686 | ||
687 | if ((this_char == '&' && (prev_char == '<' || prev_char == '>')) || | |
688 | (this_char == '|' && prev_char == '>')) | |
689 | in_command_position = 0; | |
690 | else if ((this_char == '{' && prev_char == '$') || | |
691 | (char_is_quoted (rl_line_buffer, ti))) | |
692 | in_command_position = 0; | |
693 | } | |
694 | else | |
695 | { | |
696 | /* This still could be in command position. It is possible | |
697 | that all of the previous words on the line are variable | |
698 | assignments. */ | |
699 | } | |
700 | ||
701 | /* Check that we haven't incorrectly flagged a closed command substitution | |
702 | as indicating we're in a command position. */ | |
703 | if (in_command_position && ti >= 0 && rl_line_buffer[ti] == '`' && | |
704 | *text != '`' && unclosed_pair (rl_line_buffer, 0, "`") == 0) | |
705 | in_command_position = 0; | |
706 | ||
707 | /* Special handling for command substitution. If *TEXT is a backquote, | |
708 | it can be the start or end of an old-style command substitution, or | |
709 | unmatched. If it's unmatched, both calls to unclosed_pair will | |
710 | succeed. */ | |
711 | if (*text == '`' && unclosed_pair (rl_line_buffer, start, "`") && | |
712 | unclosed_pair (rl_line_buffer, end, "`")) | |
713 | matches = completion_matches (text, command_subst_completion_function); | |
714 | ||
715 | /* Variable name? */ | |
716 | if (!matches && *text == '$') | |
717 | matches = completion_matches (text, variable_completion_function); | |
718 | ||
719 | /* If the word starts in `~', and there is no slash in the word, then | |
720 | try completing this word as a username. */ | |
721 | if (!matches && *text == '~' && !strchr (text, '/')) | |
722 | matches = completion_matches (text, username_completion_function); | |
723 | ||
724 | /* Another one. Why not? If the word starts in '@', then look through | |
725 | the world of known hostnames for completion first. */ | |
726 | if (!matches && perform_hostname_completion && *text == '@') | |
727 | matches = completion_matches (text, hostname_completion_function); | |
728 | ||
729 | /* And last, (but not least) if this word is in a command position, then | |
730 | complete over possible command names, including aliases, functions, | |
731 | and command names. */ | |
732 | if (!matches && in_command_position) | |
733 | { | |
734 | matches = completion_matches (text, command_word_completion_function); | |
735 | /* If we are attempting command completion and nothing matches, we | |
736 | do not want readline to perform filename completion for us. We | |
737 | still want to be able to complete partial pathnames, so set the | |
738 | completion ignore function to something which will remove filenames | |
739 | and leave directories in the match list. */ | |
740 | if (!matches) | |
741 | rl_ignore_some_completions_function = (Function *)bash_ignore_filenames; | |
742 | } | |
743 | ||
744 | /* This could be a globbing pattern, so try to expand it using pathname | |
745 | expansion. */ | |
746 | if (!matches && glob_pattern_p (text)) | |
747 | { | |
748 | matches = completion_matches (text, glob_complete_word); | |
749 | /* A glob expression that matches more than one filename is problematic. | |
750 | If we match more than one filename, punt. */ | |
751 | if (matches && matches[1]) | |
752 | { | |
753 | free_array (matches); | |
754 | matches = (char **)0; | |
755 | } | |
756 | } | |
757 | ||
758 | return (matches); | |
759 | } | |
760 | ||
761 | /* This is the function to call when the word to complete is in a position | |
762 | where a command word can be found. It grovels $PATH, looking for commands | |
763 | that match. It also scans aliases, function names, and the shell_builtin | |
764 | table. */ | |
765 | static char * | |
766 | command_word_completion_function (hint_text, state) | |
767 | char *hint_text; | |
768 | int state; | |
769 | { | |
770 | static char *hint = (char *)NULL; | |
771 | static char *path = (char *)NULL; | |
772 | static char *val = (char *)NULL; | |
773 | static char *filename_hint = (char *)NULL; | |
774 | static int path_index, hint_len, istate; | |
775 | static int mapping_over, local_index; | |
776 | static SHELL_VAR **varlist = (SHELL_VAR **)NULL; | |
777 | #if defined (ALIAS) | |
778 | static alias_t **alias_list = (alias_t **)NULL; | |
779 | #endif /* ALIAS */ | |
780 | ||
781 | /* We have to map over the possibilities for command words. If we have | |
782 | no state, then make one just for that purpose. */ | |
783 | if (!state) | |
784 | { | |
785 | if (hint) | |
786 | free (hint); | |
787 | ||
788 | mapping_over = 0; | |
789 | val = (char *)NULL; | |
790 | ||
791 | /* If this is an absolute program name, do not check it against | |
792 | aliases, reserved words, functions or builtins. We must check | |
793 | whether or not it is unique, and, if so, whether that filename | |
794 | is executable. */ | |
795 | if (absolute_program (hint_text)) | |
796 | { | |
797 | /* Perform tilde expansion on what's passed, so we don't end up | |
798 | passing filenames with tildes directly to stat(). */ | |
799 | if (*hint_text == '~') | |
800 | hint = bash_tilde_expand (hint_text); | |
801 | else | |
802 | hint = savestring (hint_text); | |
803 | hint_len = strlen (hint); | |
804 | ||
805 | if (filename_hint) | |
806 | free (filename_hint); | |
807 | filename_hint = savestring (hint); | |
808 | ||
809 | mapping_over = 4; | |
810 | istate = 0; | |
811 | goto inner; | |
812 | } | |
813 | ||
814 | hint = savestring (hint_text); | |
815 | hint_len = strlen (hint); | |
816 | ||
817 | path = get_string_value ("PATH"); | |
818 | path_index = 0; | |
819 | ||
820 | /* Initialize the variables for each type of command word. */ | |
821 | local_index = 0; | |
822 | ||
823 | if (varlist) | |
824 | free (varlist); | |
825 | ||
826 | varlist = all_visible_functions (); | |
827 | ||
828 | #if defined (ALIAS) | |
829 | if (alias_list) | |
830 | free (alias_list); | |
831 | ||
832 | alias_list = all_aliases (); | |
833 | #endif /* ALIAS */ | |
834 | } | |
835 | ||
836 | /* mapping_over says what we are currently hacking. Note that every case | |
837 | in this list must fall through when there are no more possibilities. */ | |
838 | ||
839 | switch (mapping_over) | |
840 | { | |
841 | case 0: /* Aliases come first. */ | |
842 | #if defined (ALIAS) | |
843 | while (alias_list && alias_list[local_index]) | |
844 | { | |
845 | register char *alias; | |
846 | ||
847 | alias = alias_list[local_index++]->name; | |
848 | ||
849 | if (STREQN (alias, hint, hint_len)) | |
850 | return (savestring (alias)); | |
851 | } | |
852 | #endif /* ALIAS */ | |
853 | local_index = 0; | |
854 | mapping_over++; | |
855 | ||
856 | case 1: /* Then shell reserved words. */ | |
857 | { | |
858 | while (word_token_alist[local_index].word) | |
859 | { | |
860 | register char *reserved_word; | |
861 | ||
862 | reserved_word = word_token_alist[local_index++].word; | |
863 | ||
864 | if (STREQN (reserved_word, hint, hint_len)) | |
865 | return (savestring (reserved_word)); | |
866 | } | |
867 | local_index = 0; | |
868 | mapping_over++; | |
869 | } | |
870 | ||
871 | case 2: /* Then function names. */ | |
872 | while (varlist && varlist[local_index]) | |
873 | { | |
874 | register char *varname; | |
875 | ||
876 | varname = varlist[local_index++]->name; | |
877 | ||
878 | if (STREQN (varname, hint, hint_len)) | |
879 | return (savestring (varname)); | |
880 | } | |
881 | local_index = 0; | |
882 | mapping_over++; | |
883 | ||
884 | case 3: /* Then shell builtins. */ | |
885 | for (; local_index < num_shell_builtins; local_index++) | |
886 | { | |
887 | /* Ignore it if it doesn't have a function pointer or if it | |
888 | is not currently enabled. */ | |
889 | if (!shell_builtins[local_index].function || | |
890 | (shell_builtins[local_index].flags & BUILTIN_ENABLED) == 0) | |
891 | continue; | |
892 | ||
893 | if (STREQN (shell_builtins[local_index].name, hint, hint_len)) | |
894 | { | |
895 | int i = local_index++; | |
896 | ||
897 | return (savestring (shell_builtins[i].name)); | |
898 | } | |
899 | } | |
900 | local_index = 0; | |
901 | mapping_over++; | |
902 | } | |
903 | ||
904 | /* Repeatedly call filename_completion_function while we have | |
905 | members of PATH left. Question: should we stat each file? | |
906 | Answer: we call executable_file () on each file. */ | |
907 | outer: | |
908 | ||
909 | istate = (val != (char *)NULL); | |
910 | ||
911 | if (!istate) | |
912 | { | |
913 | char *current_path; | |
914 | ||
915 | /* Get the next directory from the path. If there is none, then we | |
916 | are all done. */ | |
917 | if (!path || !path[path_index] || | |
918 | (current_path = extract_colon_unit (path, &path_index)) == 0) | |
919 | return ((char *)NULL); | |
920 | ||
921 | if (*current_path == 0) | |
922 | { | |
923 | free (current_path); | |
924 | current_path = savestring ("."); | |
925 | } | |
926 | ||
927 | if (*current_path == '~') | |
928 | { | |
929 | char *t; | |
930 | ||
931 | t = bash_tilde_expand (current_path); | |
932 | free (current_path); | |
933 | current_path = t; | |
934 | } | |
935 | ||
936 | if (filename_hint) | |
937 | free (filename_hint); | |
938 | ||
939 | filename_hint = xmalloc (2 + strlen (current_path) + hint_len); | |
940 | sprintf (filename_hint, "%s/%s", current_path, hint); | |
941 | ||
942 | free (current_path); | |
943 | } | |
944 | ||
945 | inner: | |
946 | val = filename_completion_function (filename_hint, istate); | |
947 | istate = 1; | |
948 | ||
949 | if (val == 0) | |
950 | { | |
951 | /* If the hint text is an absolute program, then don't bother | |
952 | searching through PATH. */ | |
953 | if (absolute_program (hint)) | |
954 | return ((char *)NULL); | |
955 | ||
956 | goto outer; | |
957 | } | |
958 | else | |
959 | { | |
960 | int match, freetemp; | |
961 | char *temp; | |
962 | ||
963 | if (absolute_program (hint)) | |
964 | { | |
965 | match = strncmp (val, hint, hint_len) == 0; | |
966 | /* If we performed tilde expansion, restore the original | |
967 | filename. */ | |
968 | if (*hint_text == '~') | |
969 | { | |
970 | int l, tl, vl; | |
971 | vl = strlen (val); | |
972 | tl = strlen (hint_text); | |
973 | l = vl - hint_len; /* # of chars added */ | |
974 | temp = xmalloc (l + 2 + tl); | |
975 | strcpy (temp, hint_text); | |
976 | strcpy (temp + tl, val + vl - l); | |
977 | } | |
978 | else | |
979 | temp = savestring (val); | |
980 | freetemp = 1; | |
981 | } | |
982 | else | |
983 | { | |
984 | temp = strrchr (val, '/'); | |
985 | ||
986 | if (temp) | |
987 | { | |
988 | temp++; | |
989 | freetemp = match = strncmp (temp, hint, hint_len) == 0; | |
990 | if (match) | |
991 | temp = savestring (temp); | |
992 | } | |
993 | else | |
994 | freetemp = match = 0; | |
995 | } | |
996 | ||
997 | /* If we have found a match, and it is an executable file or a | |
998 | directory name, return it. */ | |
999 | if (match && (executable_file (val) || is_directory (val))) | |
1000 | { | |
1001 | free (val); | |
1002 | val = ""; /* So it won't be NULL. */ | |
1003 | return (temp); | |
1004 | } | |
1005 | else | |
1006 | { | |
1007 | if (freetemp) | |
1008 | free (temp); | |
1009 | free (val); | |
1010 | goto inner; | |
1011 | } | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | /* Completion inside an unterminated command substitution. */ | |
1016 | static char * | |
1017 | command_subst_completion_function (text, state) | |
1018 | char *text; | |
1019 | int state; | |
1020 | { | |
1021 | static char **matches = (char **)NULL; | |
1022 | static char *orig_start, *filename_text = (char *)NULL; | |
1023 | static int cmd_index, start_len; | |
1024 | char *value; | |
1025 | ||
1026 | if (state == 0) | |
1027 | { | |
1028 | if (filename_text) | |
1029 | free (filename_text); | |
1030 | orig_start = text; | |
1031 | if (*text == '`') | |
1032 | text++; | |
1033 | else if (*text == '$' && text[1] == '(') | |
1034 | text += 2; | |
1035 | start_len = text - orig_start; | |
1036 | filename_text = savestring (text); | |
1037 | if (matches) | |
1038 | free (matches); | |
1039 | matches = completion_matches (filename_text, command_word_completion_function); | |
1040 | cmd_index = 0; | |
1041 | } | |
1042 | ||
1043 | if (!matches || !matches[cmd_index]) | |
1044 | { | |
1045 | rl_filename_quoting_desired = 0; /* disable quoting */ | |
1046 | return ((char *)NULL); | |
1047 | } | |
1048 | else | |
1049 | { | |
1050 | value = xmalloc (1 + start_len + strlen (matches[cmd_index])); | |
1051 | ||
1052 | if (start_len == 1) | |
1053 | value[0] = *orig_start; | |
1054 | else | |
1055 | strncpy (value, orig_start, start_len); | |
1056 | ||
1057 | strcpy (value + start_len, matches[cmd_index]); | |
1058 | ||
1059 | cmd_index++; | |
1060 | return (value); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | /* Okay, now we write the entry_function for variable completion. */ | |
1065 | static char * | |
1066 | variable_completion_function (text, state) | |
1067 | int state; | |
1068 | char *text; | |
1069 | { | |
1070 | register SHELL_VAR *var = (SHELL_VAR *)NULL; | |
1071 | static SHELL_VAR **varlist = (SHELL_VAR **)NULL; | |
1072 | static int varlist_index; | |
1073 | static char *varname = (char *)NULL; | |
1074 | static int namelen; | |
1075 | static int first_char, first_char_loc; | |
1076 | ||
1077 | if (!state) | |
1078 | { | |
1079 | if (varname) | |
1080 | free (varname); | |
1081 | ||
1082 | first_char_loc = 0; | |
1083 | first_char = text[0]; | |
1084 | ||
1085 | if (first_char == '$') | |
1086 | first_char_loc++; | |
1087 | ||
1088 | if (text[first_char_loc] == '{') | |
1089 | first_char_loc++; | |
1090 | ||
1091 | varname = savestring (text + first_char_loc); | |
1092 | ||
1093 | namelen = strlen (varname); | |
1094 | if (varlist) | |
1095 | free (varlist); | |
1096 | varlist = all_visible_variables (); | |
1097 | varlist_index = 0; | |
1098 | } | |
1099 | ||
1100 | while (varlist && varlist[varlist_index]) | |
1101 | { | |
1102 | var = varlist[varlist_index]; | |
1103 | ||
1104 | /* Compare. You can't do better than Zayre. No text is also | |
1105 | a match. */ | |
1106 | if (!*varname || (strncmp (varname, var->name, namelen) == 0)) | |
1107 | break; | |
1108 | varlist_index++; | |
1109 | } | |
1110 | ||
1111 | if (!varlist || !varlist[varlist_index]) | |
1112 | { | |
1113 | return ((char *)NULL); | |
1114 | } | |
1115 | else | |
1116 | { | |
1117 | char *value = xmalloc (4 + strlen (var->name)); | |
1118 | ||
1119 | if (first_char_loc) | |
1120 | { | |
1121 | value[0] = first_char; | |
1122 | if (first_char_loc == 2) | |
1123 | value[1] = '{'; | |
1124 | } | |
1125 | ||
1126 | strcpy (&value[first_char_loc], var->name); | |
1127 | if (first_char_loc == 2) | |
1128 | strcat (value, "}"); | |
1129 | ||
1130 | varlist_index++; | |
1131 | return (value); | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | /* How about a completion function for hostnames? */ | |
1136 | static char * | |
1137 | hostname_completion_function (text, state) | |
1138 | int state; | |
1139 | char *text; | |
1140 | { | |
1141 | static char **list = (char **)NULL; | |
1142 | static int list_index = 0; | |
1143 | static int first_char, first_char_loc; | |
1144 | ||
1145 | /* If we don't have any state, make some. */ | |
1146 | if (state == 0) | |
1147 | { | |
1148 | FREE (list); | |
1149 | ||
1150 | list = (char **)NULL; | |
1151 | ||
1152 | first_char_loc = 0; | |
1153 | first_char = *text; | |
1154 | ||
1155 | if (first_char == '@') | |
1156 | first_char_loc++; | |
1157 | ||
1158 | list = hostnames_matching (&text[first_char_loc]); | |
1159 | list_index = 0; | |
1160 | } | |
1161 | ||
1162 | if (list && list[list_index]) | |
1163 | { | |
1164 | char *t; | |
1165 | ||
1166 | t = xmalloc (2 + strlen (list[list_index])); | |
1167 | *t = first_char; | |
1168 | strcpy (t + first_char_loc, list[list_index]); | |
1169 | list_index++; | |
1170 | return (t); | |
1171 | } | |
1172 | ||
1173 | return ((char *)NULL); | |
1174 | } | |
1175 | ||
1176 | /* History and alias expand the line. */ | |
1177 | static char * | |
1178 | history_expand_line_internal (line) | |
1179 | char *line; | |
1180 | { | |
1181 | char *new_line; | |
1182 | ||
1183 | new_line = pre_process_line (line, 0, 0); | |
1184 | return (new_line == line) ? savestring (line) : new_line; | |
1185 | } | |
1186 | ||
1187 | #if defined (ALIAS) | |
1188 | /* Expand aliases in the current readline line. */ | |
1189 | static void | |
1190 | alias_expand_line (ignore) | |
1191 | int ignore; | |
1192 | { | |
1193 | char *new_line; | |
1194 | ||
1195 | new_line = alias_expand (rl_line_buffer); | |
1196 | ||
1197 | if (new_line) | |
1198 | set_up_new_line (new_line); | |
1199 | else | |
1200 | cleanup_expansion_error (); | |
1201 | } | |
1202 | #endif | |
1203 | ||
1204 | /* There was an error in expansion. Let the preprocessor print | |
1205 | the error here. */ | |
1206 | static void | |
1207 | cleanup_expansion_error () | |
1208 | { | |
1209 | char *to_free; | |
1210 | ||
1211 | fprintf (rl_outstream, "\r\n"); | |
1212 | to_free = pre_process_line (rl_line_buffer, 1, 0); | |
1213 | if (to_free != rl_line_buffer) | |
1214 | free (to_free); | |
1215 | putc ('\r', rl_outstream); | |
1216 | rl_forced_update_display (); | |
1217 | } | |
1218 | ||
1219 | /* If NEW_LINE differs from what is in the readline line buffer, add an | |
1220 | undo record to get from the readline line buffer contents to the new | |
1221 | line and make NEW_LINE the current readline line. */ | |
1222 | static void | |
1223 | maybe_make_readline_line (new_line) | |
1224 | char *new_line; | |
1225 | { | |
1226 | if (strcmp (new_line, rl_line_buffer) != 0) | |
1227 | { | |
1228 | rl_point = rl_end; | |
1229 | ||
1230 | rl_add_undo (UNDO_BEGIN, 0, 0, 0); | |
1231 | rl_delete_text (0, rl_point); | |
1232 | rl_point = rl_end = 0; | |
1233 | rl_insert_text (new_line); | |
1234 | rl_add_undo (UNDO_END, 0, 0, 0); | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | /* Make NEW_LINE be the current readline line. This frees NEW_LINE. */ | |
1239 | static void | |
1240 | set_up_new_line (new_line) | |
1241 | char *new_line; | |
1242 | { | |
1243 | int old_point = rl_point; | |
1244 | int at_end = rl_point == rl_end; | |
1245 | ||
1246 | /* If the line was history and alias expanded, then make that | |
1247 | be one thing to undo. */ | |
1248 | maybe_make_readline_line (new_line); | |
1249 | free (new_line); | |
1250 | ||
1251 | /* Place rl_point where we think it should go. */ | |
1252 | if (at_end) | |
1253 | rl_point = rl_end; | |
1254 | else if (old_point < rl_end) | |
1255 | { | |
1256 | rl_point = old_point; | |
1257 | if (!whitespace (rl_line_buffer[rl_point])) | |
1258 | rl_forward_word (1); | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | /* History expand the line. */ | |
1263 | static void | |
1264 | history_expand_line (ignore) | |
1265 | int ignore; | |
1266 | { | |
1267 | char *new_line; | |
1268 | ||
1269 | new_line = history_expand_line_internal (rl_line_buffer); | |
1270 | ||
1271 | if (new_line) | |
1272 | set_up_new_line (new_line); | |
1273 | else | |
1274 | cleanup_expansion_error (); | |
1275 | } | |
1276 | ||
1277 | /* History and alias expand the line. */ | |
1278 | static void | |
1279 | history_and_alias_expand_line (ignore) | |
1280 | int ignore; | |
1281 | { | |
1282 | char *new_line; | |
1283 | ||
1284 | new_line = pre_process_line (rl_line_buffer, 0, 0); | |
1285 | if (new_line == rl_line_buffer) | |
1286 | new_line = savestring (new_line); | |
1287 | ||
1288 | #if defined (ALIAS) | |
1289 | if (new_line) | |
1290 | { | |
1291 | char *alias_line; | |
1292 | ||
1293 | alias_line = alias_expand (new_line); | |
1294 | free (new_line); | |
1295 | new_line = alias_line; | |
1296 | } | |
1297 | #endif /* ALIAS */ | |
1298 | ||
1299 | if (new_line) | |
1300 | set_up_new_line (new_line); | |
1301 | else | |
1302 | cleanup_expansion_error (); | |
1303 | } | |
1304 | ||
1305 | /* History and alias expand the line, then perform the shell word | |
1306 | expansions by calling expand_string. */ | |
1307 | static void | |
1308 | shell_expand_line (ignore) | |
1309 | int ignore; | |
1310 | { | |
1311 | char *new_line; | |
1312 | WORD_LIST *expanded_string; | |
1313 | ||
1314 | new_line = pre_process_line (rl_line_buffer, 0, 0); | |
1315 | if (new_line == rl_line_buffer) | |
1316 | new_line = savestring (new_line); | |
1317 | ||
1318 | #if defined (ALIAS) | |
1319 | if (new_line) | |
1320 | { | |
1321 | char *alias_line; | |
1322 | ||
1323 | alias_line = alias_expand (new_line); | |
1324 | free (new_line); | |
1325 | new_line = alias_line; | |
1326 | } | |
1327 | #endif /* ALIAS */ | |
1328 | ||
1329 | if (new_line) | |
1330 | { | |
1331 | int old_point = rl_point; | |
1332 | int at_end = rl_point == rl_end; | |
1333 | ||
1334 | /* If the line was history and alias expanded, then make that | |
1335 | be one thing to undo. */ | |
1336 | maybe_make_readline_line (new_line); | |
1337 | free (new_line); | |
1338 | ||
1339 | /* If there is variable expansion to perform, do that as a separate | |
1340 | operation to be undone. */ | |
1341 | new_line = savestring (rl_line_buffer); | |
1342 | expanded_string = expand_string (new_line, 0); | |
1343 | FREE (new_line); | |
1344 | if (expanded_string == 0) | |
1345 | { | |
1346 | new_line = xmalloc (1); | |
1347 | new_line[0] = '\0'; | |
1348 | } | |
1349 | else | |
1350 | { | |
1351 | new_line = string_list (expanded_string); | |
1352 | dispose_words (expanded_string); | |
1353 | } | |
1354 | ||
1355 | maybe_make_readline_line (new_line); | |
1356 | free (new_line); | |
1357 | ||
1358 | /* Place rl_point where we think it should go. */ | |
1359 | if (at_end) | |
1360 | rl_point = rl_end; | |
1361 | else if (old_point < rl_end) | |
1362 | { | |
1363 | rl_point = old_point; | |
1364 | if (!whitespace (rl_line_buffer[rl_point])) | |
1365 | rl_forward_word (1); | |
1366 | } | |
1367 | } | |
1368 | else | |
1369 | cleanup_expansion_error (); | |
1370 | } | |
1371 | ||
1372 | /* If FIGNORE is set, then don't match files with the given suffixes when | |
1373 | completing filenames. If only one of the possibilities has an acceptable | |
1374 | suffix, delete the others, else just return and let the completer | |
1375 | signal an error. It is called by the completer when real | |
1376 | completions are done on filenames by the completer's internal | |
1377 | function, not for completion lists (M-?) and not on "other" | |
1378 | completion types, such as hostnames or commands. */ | |
1379 | ||
1380 | static struct ignorevar fignore = | |
1381 | { | |
1382 | "FIGNORE", | |
1383 | (struct ign *)0, | |
1384 | 0, | |
1385 | (char *)0, | |
1386 | (Function *) 0, | |
1387 | }; | |
1388 | ||
1389 | static void | |
1390 | _ignore_completion_names (names, name_func) | |
1391 | char **names; | |
1392 | Function *name_func; | |
1393 | { | |
1394 | char **newnames; | |
1395 | int idx, nidx; | |
1396 | ||
1397 | /* If there is only one completion, see if it is acceptable. If it is | |
1398 | not, free it up. In any case, short-circuit and return. This is a | |
1399 | special case because names[0] is not the prefix of the list of names | |
1400 | if there is only one completion; it is the completion itself. */ | |
1401 | if (names[1] == (char *)0) | |
1402 | { | |
1403 | if ((*name_func) (names[0]) == 0) | |
1404 | { | |
1405 | free (names[0]); | |
1406 | names[0] = (char *)NULL; | |
1407 | } | |
1408 | return; | |
1409 | } | |
1410 | ||
1411 | /* Allocate space for array to hold list of pointers to matching | |
1412 | filenames. The pointers are copied back to NAMES when done. */ | |
1413 | for (nidx = 1; names[nidx]; nidx++) | |
1414 | ; | |
1415 | newnames = (char **)xmalloc ((nidx + 1) * (sizeof (char *))); | |
1416 | ||
1417 | newnames[0] = names[0]; | |
1418 | for (idx = nidx = 1; names[idx]; idx++) | |
1419 | { | |
1420 | if ((*name_func) (names[idx])) | |
1421 | newnames[nidx++] = names[idx]; | |
1422 | else | |
1423 | free (names[idx]); | |
1424 | } | |
1425 | ||
1426 | newnames[nidx] = (char *)NULL; | |
1427 | ||
1428 | /* If none are acceptable then let the completer handle it. */ | |
1429 | if (nidx == 1) | |
1430 | { | |
1431 | free (names[0]); | |
1432 | names[0] = (char *)NULL; | |
1433 | free (newnames); | |
1434 | return; | |
1435 | } | |
1436 | ||
1437 | /* If only one is acceptable, copy it to names[0] and return. */ | |
1438 | if (nidx == 2) | |
1439 | { | |
1440 | free (names[0]); | |
1441 | names[0] = newnames[1]; | |
1442 | names[1] = (char *)NULL; | |
1443 | free (newnames); | |
1444 | return; | |
1445 | } | |
1446 | ||
1447 | /* Copy the acceptable names back to NAMES, set the new array end, | |
1448 | and return. */ | |
1449 | for (nidx = 1; newnames[nidx]; nidx++) | |
1450 | names[nidx] = newnames[nidx]; | |
1451 | names[nidx] = (char *)NULL; | |
1452 | free (newnames); | |
1453 | } | |
1454 | ||
1455 | static int | |
1456 | name_is_acceptable (name) | |
1457 | char *name; | |
1458 | { | |
1459 | struct ign *p; | |
1460 | int nlen; | |
1461 | ||
1462 | for (nlen = strlen (name), p = fignore.ignores; p->val; p++) | |
1463 | { | |
1464 | if (nlen > p->len && p->len > 0 && STREQ (p->val, &name[nlen - p->len])) | |
1465 | return (0); | |
1466 | } | |
1467 | ||
1468 | return (1); | |
1469 | } | |
1470 | ||
1471 | static void | |
1472 | filename_completion_ignore (names) | |
1473 | char **names; | |
1474 | { | |
1475 | setup_ignore_patterns (&fignore); | |
1476 | ||
1477 | if (fignore.num_ignores == 0) | |
1478 | return; | |
1479 | ||
1480 | _ignore_completion_names (names, name_is_acceptable); | |
1481 | } | |
1482 | ||
1483 | /* Return 1 if NAME is a directory. */ | |
1484 | static int | |
1485 | test_for_directory (name) | |
1486 | char *name; | |
1487 | { | |
1488 | struct stat finfo; | |
1489 | char *fn; | |
1490 | ||
1491 | fn = bash_tilde_expand (name); | |
1492 | if (stat (fn, &finfo) != 0) | |
1493 | { | |
1494 | free (fn); | |
1495 | return 0; | |
1496 | } | |
1497 | free (fn); | |
1498 | return (S_ISDIR (finfo.st_mode)); | |
1499 | } | |
1500 | ||
1501 | /* Remove files from NAMES, leaving directories. */ | |
1502 | static void | |
1503 | bash_ignore_filenames (names) | |
1504 | char **names; | |
1505 | { | |
1506 | _ignore_completion_names (names, test_for_directory); | |
1507 | } | |
1508 | ||
1509 | /* Handle symbolic link references and other directory name | |
1510 | expansions while hacking completion. */ | |
1511 | static int | |
1512 | bash_directory_completion_hook (dirname) | |
1513 | char **dirname; | |
1514 | { | |
1515 | char *local_dirname, *t; | |
1516 | int return_value = 0; | |
1517 | WORD_LIST *wl; | |
1518 | ||
1519 | local_dirname = *dirname; | |
1520 | if (strchr (local_dirname, '$') || strchr (local_dirname, '`')) | |
1521 | { | |
1522 | wl = expand_string (local_dirname, 0); | |
1523 | if (wl) | |
1524 | { | |
1525 | *dirname = string_list (wl); | |
1526 | /* Tell the completer to replace the directory name only if we | |
1527 | actually expanded something. */ | |
1528 | return_value = STREQ (local_dirname, *dirname) == 0; | |
1529 | free (local_dirname); | |
1530 | dispose_words (wl); | |
1531 | local_dirname = *dirname; | |
1532 | } | |
1533 | else | |
1534 | { | |
1535 | free (local_dirname); | |
1536 | *dirname = xmalloc (1); | |
1537 | **dirname = '\0'; | |
1538 | return 1; | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | if (!no_symbolic_links && (local_dirname[0] != '.' || local_dirname[1])) | |
1543 | { | |
1544 | char *temp1, *temp2; | |
1545 | int len1, len2; | |
1546 | ||
1547 | t = get_working_directory ("symlink-hook"); | |
1548 | temp1 = make_absolute (local_dirname, t); | |
1549 | free (t); | |
1550 | temp2 = canonicalize_pathname (temp1); | |
1551 | /* If we can't canonicalize, bail. */ | |
1552 | if (temp2 == 0) | |
1553 | { | |
1554 | free (temp1); | |
1555 | return 1; | |
1556 | } | |
1557 | len1 = strlen (temp1); | |
1558 | if (temp1[len1 - 1] == '/') | |
1559 | { | |
1560 | len2 = strlen (temp2); | |
1561 | temp2 = xrealloc (temp2, len2 + 2); | |
1562 | temp2[len2] = '/'; | |
1563 | temp2[len2 + 1] = '\0'; | |
1564 | } | |
1565 | free (local_dirname); | |
1566 | *dirname = temp2; | |
1567 | free (temp1); | |
1568 | } | |
1569 | return (return_value); | |
1570 | } | |
1571 | ||
1572 | static char **history_completion_array = (char **)NULL; | |
1573 | static int harry_size; | |
1574 | static int harry_len; | |
1575 | ||
1576 | static void | |
1577 | build_history_completion_array () | |
1578 | { | |
1579 | register int i, j; | |
1580 | HIST_ENTRY **hlist; | |
1581 | char **tokens; | |
1582 | ||
1583 | /* First, clear out the current dynamic history completion list. */ | |
1584 | if (harry_size) | |
1585 | { | |
1586 | for (i = 0; history_completion_array[i]; i++) | |
1587 | free (history_completion_array[i]); | |
1588 | ||
1589 | free (history_completion_array); | |
1590 | ||
1591 | history_completion_array = (char **)NULL; | |
1592 | harry_size = 0; | |
1593 | harry_len = 0; | |
1594 | } | |
1595 | ||
1596 | /* Next, grovel each line of history, making each shell-sized token | |
1597 | a separate entry in the history_completion_array. */ | |
1598 | hlist = history_list (); | |
1599 | ||
1600 | if (hlist) | |
1601 | { | |
1602 | for (i = 0; hlist[i]; i++) | |
1603 | { | |
1604 | /* Separate each token, and place into an array. */ | |
1605 | tokens = history_tokenize (hlist[i]->line); | |
1606 | ||
1607 | for (j = 0; tokens && tokens[j]; j++) | |
1608 | { | |
1609 | if (harry_len + 2 > harry_size) | |
1610 | { | |
1611 | harry_size += 10; | |
1612 | history_completion_array = (char **) xrealloc | |
1613 | (history_completion_array, harry_size * sizeof (char *)); | |
1614 | } | |
1615 | ||
1616 | history_completion_array[harry_len++] = tokens[j]; | |
1617 | history_completion_array[harry_len] = (char *)NULL; | |
1618 | } | |
1619 | free (tokens); | |
1620 | } | |
1621 | ||
1622 | /* Sort the complete list of tokens. */ | |
1623 | qsort (history_completion_array, harry_len, sizeof (char *), (Function *)qsort_string_compare); | |
1624 | } | |
1625 | } | |
1626 | ||
1627 | static char * | |
1628 | history_completion_generator (hint_text, state) | |
1629 | char *hint_text; | |
1630 | int state; | |
1631 | { | |
1632 | static int local_index, len; | |
1633 | static char *text; | |
1634 | ||
1635 | /* If this is the first call to the generator, then initialize the | |
1636 | list of strings to complete over. */ | |
1637 | if (state == 0) | |
1638 | { | |
1639 | local_index = 0; | |
1640 | build_history_completion_array (); | |
1641 | text = hint_text; | |
1642 | len = strlen (text); | |
1643 | } | |
1644 | ||
1645 | while (history_completion_array && history_completion_array[local_index]) | |
1646 | { | |
1647 | if (strncmp (text, history_completion_array[local_index++], len) == 0) | |
1648 | return (savestring (history_completion_array[local_index - 1])); | |
1649 | } | |
1650 | return ((char *)NULL); | |
1651 | } | |
1652 | ||
1653 | static void | |
1654 | dynamic_complete_history (count, key) | |
1655 | int count, key; | |
1656 | { | |
1657 | Function *orig_func; | |
1658 | CPPFunction *orig_attempt_func; | |
1659 | ||
1660 | orig_func = rl_completion_entry_function; | |
1661 | orig_attempt_func = rl_attempted_completion_function; | |
1662 | rl_completion_entry_function = (Function *)history_completion_generator; | |
1663 | rl_attempted_completion_function = (CPPFunction *)NULL; | |
1664 | ||
1665 | if (rl_last_func == (Function *)dynamic_complete_history) | |
1666 | rl_complete_internal ('?'); | |
1667 | else | |
1668 | rl_complete_internal (TAB); | |
1669 | ||
1670 | rl_completion_entry_function = orig_func; | |
1671 | rl_attempted_completion_function = orig_attempt_func; | |
1672 | } | |
1673 | ||
1674 | #if defined (SPECIFIC_COMPLETION_FUNCTIONS) | |
1675 | static void | |
1676 | bash_complete_username (ignore, ignore2) | |
1677 | int ignore, ignore2; | |
1678 | { | |
1679 | bash_complete_username_internal (TAB); | |
1680 | } | |
1681 | ||
1682 | static void | |
1683 | bash_possible_username_completions (ignore, ignore2) | |
1684 | int ignore, ignore2; | |
1685 | { | |
1686 | bash_complete_username_internal ('?'); | |
1687 | } | |
1688 | ||
1689 | static void | |
1690 | bash_complete_username_internal (what_to_do) | |
1691 | int what_to_do; | |
1692 | { | |
1693 | bash_specific_completion | |
1694 | (what_to_do, (Function *)username_completion_function); | |
1695 | } | |
1696 | ||
1697 | static void | |
1698 | bash_complete_filename (ignore, ignore2) | |
1699 | int ignore, ignore2; | |
1700 | { | |
1701 | bash_complete_filename_internal (TAB); | |
1702 | } | |
1703 | ||
1704 | static void | |
1705 | bash_possible_filename_completions (ignore, ignore2) | |
1706 | int ignore, ignore2; | |
1707 | { | |
1708 | bash_complete_filename_internal ('?'); | |
1709 | } | |
1710 | ||
1711 | static void | |
1712 | bash_complete_filename_internal (what_to_do) | |
1713 | int what_to_do; | |
1714 | { | |
1715 | Function *orig_func, *orig_dir_func; | |
1716 | CPPFunction *orig_attempt_func; | |
1717 | char *orig_rl_completer_word_break_characters; | |
1718 | ||
1719 | orig_func = rl_completion_entry_function; | |
1720 | orig_attempt_func = rl_attempted_completion_function; | |
1721 | orig_dir_func = rl_directory_completion_hook; | |
1722 | orig_rl_completer_word_break_characters = rl_completer_word_break_characters; | |
1723 | rl_completion_entry_function = (Function *)filename_completion_function; | |
1724 | rl_attempted_completion_function = (CPPFunction *)NULL; | |
1725 | rl_directory_completion_hook = (Function *)NULL; | |
1726 | rl_completer_word_break_characters = " \t\n\"\'"; | |
1727 | ||
1728 | rl_complete_internal (what_to_do); | |
1729 | ||
1730 | rl_completion_entry_function = orig_func; | |
1731 | rl_attempted_completion_function = orig_attempt_func; | |
1732 | rl_directory_completion_hook = orig_dir_func; | |
1733 | rl_completer_word_break_characters = orig_rl_completer_word_break_characters; | |
1734 | } | |
1735 | ||
1736 | static void | |
1737 | bash_complete_hostname (ignore, ignore2) | |
1738 | int ignore, ignore2; | |
1739 | { | |
1740 | bash_complete_hostname_internal (TAB); | |
1741 | } | |
1742 | ||
1743 | static void | |
1744 | bash_possible_hostname_completions (ignore, ignore2) | |
1745 | int ignore, ignore2; | |
1746 | { | |
1747 | bash_complete_hostname_internal ('?'); | |
1748 | } | |
1749 | ||
1750 | static void | |
1751 | bash_complete_variable (ignore, ignore2) | |
1752 | int ignore, ignore2; | |
1753 | { | |
1754 | bash_complete_variable_internal (TAB); | |
1755 | } | |
1756 | ||
1757 | static void | |
1758 | bash_possible_variable_completions (ignore, ignore2) | |
1759 | int ignore, ignore2; | |
1760 | { | |
1761 | bash_complete_variable_internal ('?'); | |
1762 | } | |
1763 | ||
1764 | static void | |
1765 | bash_complete_command (ignore, ignore2) | |
1766 | int ignore, ignore2; | |
1767 | { | |
1768 | bash_complete_command_internal (TAB); | |
1769 | } | |
1770 | ||
1771 | static void | |
1772 | bash_possible_command_completions (ignore, ignore2) | |
1773 | int ignore, ignore2; | |
1774 | { | |
1775 | bash_complete_command_internal ('?'); | |
1776 | } | |
1777 | ||
1778 | static void | |
1779 | bash_complete_hostname_internal (what_to_do) | |
1780 | int what_to_do; | |
1781 | { | |
1782 | bash_specific_completion | |
1783 | (what_to_do, (Function *)hostname_completion_function); | |
1784 | } | |
1785 | ||
1786 | static void | |
1787 | bash_complete_variable_internal (what_to_do) | |
1788 | int what_to_do; | |
1789 | { | |
1790 | bash_specific_completion | |
1791 | (what_to_do, (Function *)variable_completion_function); | |
1792 | } | |
1793 | ||
1794 | static void | |
1795 | bash_complete_command_internal (what_to_do) | |
1796 | int what_to_do; | |
1797 | { | |
1798 | bash_specific_completion | |
1799 | (what_to_do, (Function *)command_word_completion_function); | |
1800 | } | |
1801 | ||
1802 | static char * | |
1803 | glob_complete_word (text, state) | |
1804 | char *text; | |
1805 | int state; | |
1806 | { | |
1807 | static char **matches = (char **)NULL; | |
1808 | static int ind; | |
1809 | char *ret; | |
1810 | ||
1811 | if (state == 0) | |
1812 | { | |
1813 | rl_filename_completion_desired = 1; | |
1814 | if (matches) | |
1815 | free (matches); | |
1816 | matches = shell_glob_filename (text); | |
1817 | if (GLOB_FAILED (matches)) | |
1818 | matches = (char **)NULL; | |
1819 | ind = 0; | |
1820 | } | |
1821 | ||
1822 | ret = matches ? matches[ind] : (char *)NULL; | |
1823 | ind++; | |
1824 | return ret; | |
1825 | } | |
1826 | ||
1827 | static void | |
1828 | bash_glob_completion_internal (what_to_do) | |
1829 | int what_to_do; | |
1830 | { | |
1831 | bash_specific_completion (what_to_do, (Function *)glob_complete_word); | |
1832 | } | |
1833 | ||
1834 | static void | |
1835 | bash_glob_expand_word (count, key) | |
1836 | int count, key; | |
1837 | { | |
1838 | bash_glob_completion_internal ('*'); | |
1839 | } | |
1840 | ||
1841 | static void | |
1842 | bash_glob_list_expansions (count, key) | |
1843 | int count, key; | |
1844 | { | |
1845 | bash_glob_completion_internal ('?'); | |
1846 | } | |
1847 | ||
1848 | static void | |
1849 | bash_specific_completion (what_to_do, generator) | |
1850 | int what_to_do; | |
1851 | Function *generator; | |
1852 | { | |
1853 | Function *orig_func; | |
1854 | CPPFunction *orig_attempt_func; | |
1855 | ||
1856 | orig_func = rl_completion_entry_function; | |
1857 | orig_attempt_func = rl_attempted_completion_function; | |
1858 | rl_completion_entry_function = generator; | |
1859 | rl_attempted_completion_function = (CPPFunction *)NULL; | |
1860 | ||
1861 | rl_complete_internal (what_to_do); | |
1862 | ||
1863 | rl_completion_entry_function = orig_func; | |
1864 | rl_attempted_completion_function = orig_attempt_func; | |
1865 | } | |
1866 | ||
1867 | #endif /* SPECIFIC_COMPLETION_FUNCTIONS */ | |
1868 | ||
1869 | /* Filename quoting for completion. */ | |
1870 | /* A function to strip quotes that are not protected by backquotes. It | |
1871 | allows single quotes to appear within double quotes, and vice versa. | |
1872 | It should be smarter. */ | |
1873 | static char * | |
1874 | bash_dequote_filename (text, quote_char) | |
1875 | char *text; | |
1876 | { | |
1877 | char *ret, *p, *r; | |
1878 | int l, quoted; | |
1879 | ||
1880 | l = strlen (text); | |
1881 | ret = xmalloc (l + 1); | |
1882 | for (quoted = quote_char, p = text, r = ret; p && *p; p++) | |
1883 | { | |
1884 | /* Allow backslash-quoted characters to pass through unscathed. */ | |
1885 | if (*p == '\\') | |
1886 | { | |
1887 | *r++ = *++p; | |
1888 | if (*p == '\0') | |
1889 | break; | |
1890 | continue; | |
1891 | } | |
1892 | /* Close quote. */ | |
1893 | if (quoted && *p == quoted) | |
1894 | { | |
1895 | quoted = 0; | |
1896 | continue; | |
1897 | } | |
1898 | /* Open quote. */ | |
1899 | if (quoted == 0 && (*p == '\'' || *p == '"')) | |
1900 | { | |
1901 | quoted = *p; | |
1902 | continue; | |
1903 | } | |
1904 | *r++ = *p; | |
1905 | } | |
1906 | *r = '\0'; | |
1907 | return ret; | |
1908 | } | |
1909 | ||
1910 | /* Quote characters that the readline completion code would treat as | |
1911 | word break characters with backslashes. Pass backslash-quoted | |
1912 | characters through without examination. */ | |
1913 | static char * | |
1914 | quote_word_break_chars (text) | |
1915 | char *text; | |
1916 | { | |
1917 | char *ret, *r, *s; | |
1918 | int l; | |
1919 | ||
1920 | l = strlen (text); | |
1921 | ret = xmalloc ((2 * l) + 1); | |
1922 | for (s = text, r = ret; *s; s++) | |
1923 | { | |
1924 | /* Pass backslash-quoted characters through, including the backslash. */ | |
1925 | if (*s == '\\') | |
1926 | { | |
1927 | *r++ = '\\'; | |
1928 | *r++ = *++s; | |
1929 | if (*s == '\0') | |
1930 | break; | |
1931 | continue; | |
1932 | } | |
1933 | /* OK, we have an unquoted character. Check its presence in | |
1934 | rl_completer_word_break_characters. */ | |
1935 | if (strchr (rl_completer_word_break_characters, *s)) | |
1936 | *r++ = '\\'; | |
1937 | *r++ = *s; | |
1938 | } | |
1939 | *r = '\0'; | |
1940 | return ret; | |
1941 | } | |
1942 | ||
1943 | /* Quote a filename using double quotes, single quotes, or backslashes | |
1944 | depending on the value of completion_quoting_style. If we're | |
1945 | completing using backslashes, we need to quote some additional | |
1946 | characters (those that readline treats as word breaks), so we call | |
1947 | quote_word_break_chars on the result. */ | |
1948 | static char * | |
1949 | bash_quote_filename (s, rtype, qcp) | |
1950 | char *s; | |
1951 | int rtype; | |
1952 | char *qcp; | |
1953 | { | |
1954 | char *rtext, *mtext, *ret; | |
1955 | int rlen, cs; | |
1956 | ||
1957 | rtext = (char *)NULL; | |
1958 | ||
1959 | /* If RTYPE == MULT_MATCH, it means that there is | |
1960 | more than one match. In this case, we do not add | |
1961 | the closing quote or attempt to perform tilde | |
1962 | expansion. If RTYPE == SINGLE_MATCH, we try | |
1963 | to perform tilde expansion, because single and double | |
1964 | quotes inhibit tilde expansion by the shell. */ | |
1965 | ||
1966 | mtext = s; | |
1967 | if (mtext[0] == '~' && rtype == SINGLE_MATCH) | |
1968 | mtext = bash_tilde_expand (s); | |
1969 | ||
1970 | cs = completion_quoting_style; | |
1971 | /* Might need to modify the default completion style based on *qcp, | |
1972 | since it's set to any user-provided opening quote. */ | |
1973 | if (*qcp == '"') | |
1974 | cs = COMPLETE_DQUOTE; | |
1975 | else if (*qcp == '\'') | |
1976 | cs = COMPLETE_SQUOTE; | |
1977 | #if defined (BANG_HISTORY) | |
1978 | else if (*qcp == '\0' && history_expansion && cs == COMPLETE_DQUOTE && | |
1979 | history_expansion_inhibited == 0 && strchr (mtext, '!')) | |
1980 | cs = COMPLETE_BSQUOTE; | |
1981 | ||
1982 | if (*qcp == '"' && history_expansion && cs == COMPLETE_DQUOTE && | |
1983 | history_expansion_inhibited == 0 && strchr (mtext, '!')) | |
1984 | { | |
1985 | cs = COMPLETE_BSQUOTE; | |
1986 | *qcp = '\0'; | |
1987 | } | |
1988 | #endif | |
1989 | ||
1990 | switch (cs) | |
1991 | { | |
1992 | case COMPLETE_DQUOTE: | |
1993 | rtext = double_quote (mtext); | |
1994 | break; | |
1995 | case COMPLETE_SQUOTE: | |
1996 | rtext = single_quote (mtext); | |
1997 | break; | |
1998 | case COMPLETE_BSQUOTE: | |
1999 | rtext = backslash_quote (mtext); | |
2000 | break; | |
2001 | } | |
2002 | ||
2003 | if (mtext != s) | |
2004 | free (mtext); | |
2005 | ||
2006 | /* We may need to quote additional characters: those that readline treats | |
2007 | as word breaks that are not quoted by backslash_quote. */ | |
2008 | if (rtext && cs == COMPLETE_BSQUOTE) | |
2009 | { | |
2010 | mtext = quote_word_break_chars (rtext); | |
2011 | free (rtext); | |
2012 | rtext = mtext; | |
2013 | } | |
2014 | ||
2015 | /* Leave the opening quote intact. The readline completion code takes | |
2016 | care of avoiding doubled opening quotes. */ | |
2017 | rlen = strlen (rtext); | |
2018 | ret = xmalloc (rlen + 1); | |
2019 | strcpy (ret, rtext); | |
2020 | ||
2021 | /* If there are multiple matches, cut off the closing quote. */ | |
2022 | if (rtype == MULT_MATCH && cs != COMPLETE_BSQUOTE) | |
2023 | ret[rlen - 1] = '\0'; | |
2024 | free (rtext); | |
2025 | return ret; | |
2026 | } | |
2027 | ||
2028 | #endif /* READLINE */ |