1 /* vi: set sw=4 ts=4: */
3 * Command line editing.
5 * Copyright (c) 1986-2003 may safely be consumed by a BSD or GPL license.
6 * Written by: Vladimir Oleynik <dzo@simtreas.ru>
9 * Adam Rogoyski <rogoyski@cs.utexas.edu>
10 * Dave Cinege <dcinege@psychosis.com>
11 * Jakub Jelinek (c) 1995
12 * Erik Andersen <andersen@codepoet.org> (Majorly adjusted for busybox)
14 * This code is 'as is' with no warranty.
18 * Usage and known bugs:
19 * Terminal key codes are not extensive, more needs to be added.
20 * This version was created on Debian GNU/Linux 2.x.
21 * Delete, Backspace, Home, End, and the arrow keys were tested
22 * to work in an Xterm and console. Ctrl-A also works as Home.
23 * Ctrl-E also works as End.
25 * The following readline-like commands are not implemented:
26 * ESC-b -- Move back one word
27 * ESC-f -- Move forward one word
28 * ESC-d -- Delete forward one word
29 * CTL-t -- Transpose two characters
31 * lineedit does not know that the terminal escape sequences do not
32 * take up space on the screen. The redisplay code assumes, unless
33 * told otherwise, that each character in the prompt is a printable
34 * character that takes up one character position on the screen.
35 * You need to tell lineedit that some sequences of characters
36 * in the prompt take up no screen space. Compatibly with readline,
37 * use the \[ escape to begin a sequence of non-printing characters,
38 * and the \] escape to signal the end of such a sequence. Example:
40 * PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
42 * Unicode in PS1 is not fully supported: prompt length calulation is wrong,
43 * resulting in line wrap problems with long (multi-line) input.
45 * Multi-line PS1 (e.g. PS1="\n[\w]\n$ ") has problems with history
46 * browsing: up/down arrows result in scrolling.
47 * It stems from simplistic "cmdedit_y = cmdedit_prmt_len / cmdedit_termw"
48 * calculation of how many lines the prompt takes.
52 #ifndef _POSIX_VDISABLE
53 # define _POSIX_VDISABLE '\0'
58 # define ENABLE_FEATURE_EDITING 0
59 # define ENABLE_FEATURE_TAB_COMPLETION 0
60 # define ENABLE_FEATURE_USERNAME_COMPLETION 0
64 /* Entire file (except TESTing part) sits inside this #if */
65 #if ENABLE_FEATURE_EDITING
68 #define ENABLE_USERNAME_OR_HOMEDIR \
69 (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
70 #define IF_USERNAME_OR_HOMEDIR(...)
71 #if ENABLE_USERNAME_OR_HOMEDIR
72 # undef IF_USERNAME_OR_HOMEDIR
73 # define IF_USERNAME_OR_HOMEDIR(...) __VA_ARGS__
78 #if ENABLE_UNICODE_SUPPORT
79 # define BB_NUL ((wchar_t)0)
80 # define CHAR_T wchar_t
81 static bool BB_isspace(CHAR_T c
) { return ((unsigned)c
< 256 && isspace(c
)); }
82 # if ENABLE_FEATURE_EDITING_VI
83 static bool BB_isalnum(CHAR_T c
) { return ((unsigned)c
< 256 && isalnum(c
)); }
85 static bool BB_ispunct(CHAR_T c
) { return ((unsigned)c
< 256 && ispunct(c
)); }
90 # define isspace isspace_must_not_be_used
91 # define isalnum isalnum_must_not_be_used
92 # define ispunct ispunct_must_not_be_used
93 # define isprint isprint_must_not_be_used
97 # define BB_isspace(c) isspace(c)
98 # define BB_isalnum(c) isalnum(c)
99 # define BB_ispunct(c) ispunct(c)
101 #if ENABLE_UNICODE_PRESERVE_BROKEN
102 # define unicode_mark_raw_byte(wc) ((wc) | 0x20000000)
103 # define unicode_is_raw_byte(wc) ((wc) & 0x20000000)
105 # define unicode_is_raw_byte(wc) 0
111 #define SEQ_CLEAR_TILL_END_OF_SCREEN ESC"[J"
112 //#define SEQ_CLEAR_TILL_END_OF_LINE ESC"[K"
116 MAX_LINELEN
= CONFIG_FEATURE_EDITING_MAX_LEN
< 0x7ff0
117 ? CONFIG_FEATURE_EDITING_MAX_LEN
121 #if ENABLE_USERNAME_OR_HOMEDIR
122 static const char null_str
[] ALIGN1
= "";
125 /* We try to minimize both static and stack usage. */
126 struct lineedit_statics
{
129 volatile unsigned cmdedit_termw
; /* = 80; */ /* actual terminal width */
130 sighandler_t previous_SIGWINCH_handler
;
132 unsigned cmdedit_x
; /* real x (col) terminal position */
133 unsigned cmdedit_y
; /* pseudoreal y (row) terminal position */
134 unsigned cmdedit_prmt_len
; /* length of prompt (without colors etc) */
137 int command_len
; /* must be signed */
138 /* signed maxsize: we want x in "if (x > S.maxsize)"
139 * to _not_ be promoted to unsigned */
143 const char *cmdedit_prompt
;
145 #if ENABLE_USERNAME_OR_HOMEDIR
147 char *home_pwd_buf
; /* = (char*)null_str; */
150 #if ENABLE_FEATURE_TAB_COMPLETION
152 unsigned num_matches
;
155 #if ENABLE_FEATURE_EDITING_VI
156 # define DELBUFSIZ 128
158 smallint newdelflag
; /* whether delbuf should be reused yet */
159 CHAR_T delbuf
[DELBUFSIZ
]; /* a place to store deleted characters */
161 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
162 smallint sent_ESC_br6n
;
166 /* See lineedit_ptr_hack.c */
167 extern struct lineedit_statics
*const lineedit_ptr_to_statics
;
169 #define S (*lineedit_ptr_to_statics)
170 #define state (S.state )
171 #define cmdedit_termw (S.cmdedit_termw )
172 #define previous_SIGWINCH_handler (S.previous_SIGWINCH_handler)
173 #define cmdedit_x (S.cmdedit_x )
174 #define cmdedit_y (S.cmdedit_y )
175 #define cmdedit_prmt_len (S.cmdedit_prmt_len)
176 #define cursor (S.cursor )
177 #define command_len (S.command_len )
178 #define command_ps (S.command_ps )
179 #define cmdedit_prompt (S.cmdedit_prompt )
180 #define user_buf (S.user_buf )
181 #define home_pwd_buf (S.home_pwd_buf )
182 #define matches (S.matches )
183 #define num_matches (S.num_matches )
184 #define delptr (S.delptr )
185 #define newdelflag (S.newdelflag )
186 #define delbuf (S.delbuf )
188 #define INIT_S() do { \
189 (*(struct lineedit_statics**)&lineedit_ptr_to_statics) = xzalloc(sizeof(S)); \
191 cmdedit_termw = 80; \
192 IF_USERNAME_OR_HOMEDIR(home_pwd_buf = (char*)null_str;) \
193 IF_FEATURE_EDITING_VI(delptr = delbuf;) \
196 static void deinit_S(void)
198 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
199 /* This one is allocated only if FANCY_PROMPT is on
200 * (otherwise it points to verbatim prompt (NOT malloced)) */
201 free((char*)cmdedit_prompt
);
203 #if ENABLE_USERNAME_OR_HOMEDIR
205 if (home_pwd_buf
!= null_str
)
208 free(lineedit_ptr_to_statics
);
210 #define DEINIT_S() deinit_S()
213 #if ENABLE_UNICODE_SUPPORT
214 static size_t load_string(const char *src
)
216 if (unicode_status
== UNICODE_ON
) {
217 ssize_t len
= mbstowcs(command_ps
, src
, S
.maxsize
- 1);
220 command_ps
[len
] = BB_NUL
;
224 while (src
[i
] && i
< S
.maxsize
- 1) {
225 command_ps
[i
] = src
[i
];
228 command_ps
[i
] = BB_NUL
;
232 static unsigned save_string(char *dst
, unsigned maxsize
)
234 if (unicode_status
== UNICODE_ON
) {
235 # if !ENABLE_UNICODE_PRESERVE_BROKEN
236 ssize_t len
= wcstombs(dst
, command_ps
, maxsize
- 1);
246 while (dstpos
< maxsize
) {
250 /* Convert up to 1st invalid byte (or up to end) */
251 while ((wc
= command_ps
[srcpos
]) != BB_NUL
252 && !unicode_is_raw_byte(wc
)
256 command_ps
[srcpos
] = BB_NUL
;
257 n
= wcstombs(dst
+ dstpos
, command_ps
+ n
, maxsize
- dstpos
);
258 if (n
< 0) /* should not happen */
261 if (wc
== BB_NUL
) /* usually is */
264 /* We do have invalid byte here! */
265 command_ps
[srcpos
] = wc
; /* restore it */
267 if (dstpos
== maxsize
)
269 dst
[dstpos
++] = (char) wc
;
276 while ((dst
[i
] = command_ps
[i
]) != 0)
281 /* I thought just fputwc(c, stdout) would work. But no... */
282 static void BB_PUTCHAR(wchar_t c
)
284 if (unicode_status
== UNICODE_ON
) {
285 char buf
[MB_CUR_MAX
+ 1];
286 mbstate_t mbst
= { 0 };
287 ssize_t len
= wcrtomb(buf
, c
, &mbst
);
293 /* In this case, c is always one byte */
297 # if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
298 static wchar_t adjust_width_and_validate_wc(unsigned *width_adj
, wchar_t wc
)
300 static wchar_t adjust_width_and_validate_wc(wchar_t wc
)
301 # define adjust_width_and_validate_wc(width_adj, wc) \
302 ((*(width_adj))++, adjust_width_and_validate_wc(wc))
307 if (unicode_status
== UNICODE_ON
) {
308 if (wc
> CONFIG_LAST_SUPPORTED_WCHAR
) {
309 /* note: also true for unicode_is_raw_byte(wc) */
313 if ((ENABLE_UNICODE_COMBINING_WCHARS
&& w
< 0)
314 || (!ENABLE_UNICODE_COMBINING_WCHARS
&& w
<= 0)
315 || (!ENABLE_UNICODE_WIDE_WCHARS
&& w
> 1)
319 wc
= CONFIG_SUBST_WCHAR
;
323 # if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
329 static size_t load_string(const char *src
)
331 safe_strncpy(command_ps
, src
, S
.maxsize
);
332 return strlen(command_ps
);
334 # if ENABLE_FEATURE_TAB_COMPLETION
335 static void save_string(char *dst
, unsigned maxsize
)
337 safe_strncpy(dst
, command_ps
, maxsize
);
340 # define BB_PUTCHAR(c) bb_putchar(c)
341 /* Should never be called: */
342 int adjust_width_and_validate_wc(unsigned *width_adj
, int wc
);
346 /* Put 'command_ps[cursor]', cursor++.
347 * Advance cursor on screen. If we reached right margin, scroll text up
348 * and remove terminal margin effect by printing 'next_char' */
349 #define HACK_FOR_WRONG_WIDTH 1
350 static void put_cur_glyph_and_inc_cursor(void)
352 CHAR_T c
= command_ps
[cursor
];
357 /* erase character after end of input string */
360 /* advance cursor only if we aren't at the end yet */
362 if (unicode_status
== UNICODE_ON
) {
363 IF_UNICODE_WIDE_WCHARS(width
= cmdedit_x
;)
364 c
= adjust_width_and_validate_wc(&cmdedit_x
, c
);
365 IF_UNICODE_WIDE_WCHARS(width
= cmdedit_x
- width
;)
371 ofs_to_right
= cmdedit_x
- cmdedit_termw
;
372 if (!ENABLE_UNICODE_WIDE_WCHARS
|| ofs_to_right
<= 0) {
373 /* c fits on this line */
377 if (ofs_to_right
>= 0) {
378 /* we go to the next line */
379 #if HACK_FOR_WRONG_WIDTH
380 /* This works better if our idea of term width is wrong
381 * and it is actually wider (often happens on serial lines).
382 * Printing CR,LF *forces* cursor to next line.
383 * OTOH if terminal width is correct AND terminal does NOT
384 * have automargin (IOW: it is moving cursor to next line
385 * by itself (which is wrong for VT-10x terminals)),
386 * this will break things: there will be one extra empty line */
387 puts("\r"); /* + implicit '\n' */
389 /* VT-10x terminals don't wrap cursor to next line when last char
390 * on the line is printed - cursor stays "over" this char.
391 * Need to print _next_ char too (first one to appear on next line)
392 * to make cursor move down to next line.
394 /* Works ok only if cmdedit_termw is correct. */
395 c
= command_ps
[cursor
];
402 if (!ENABLE_UNICODE_WIDE_WCHARS
|| ofs_to_right
== 0) {
404 } else { /* ofs_to_right > 0 */
405 /* wide char c didn't fit on prev line */
412 /* Move to end of line (by printing all chars till the end) */
413 static void put_till_end_and_adv_cursor(void)
415 while (cursor
< command_len
)
416 put_cur_glyph_and_inc_cursor();
419 /* Go to the next line */
420 static void goto_new_line(void)
422 put_till_end_and_adv_cursor();
427 static void beep(void)
432 static void put_prompt(void)
436 fputs(cmdedit_prompt
, stdout
);
439 w
= cmdedit_termw
; /* read volatile var once */
440 cmdedit_y
= cmdedit_prmt_len
/ w
; /* new quasireal y */
441 cmdedit_x
= cmdedit_prmt_len
% w
;
444 /* Move back one character */
445 /* (optimized for slow terminals) */
446 static void input_backward(unsigned num
)
454 if ((ENABLE_UNICODE_COMBINING_WCHARS
|| ENABLE_UNICODE_WIDE_WCHARS
)
455 && unicode_status
== UNICODE_ON
457 /* correct NUM to be equal to _screen_ width */
461 adjust_width_and_validate_wc(&num
, command_ps
[cursor
+ n
]);
466 if (cmdedit_x
>= num
) {
469 /* This is longer by 5 bytes on x86.
470 * Also gets miscompiled for ARM users
471 * (busybox.net/bugs/view.php?id=2274).
472 * printf(("\b\b\b\b" + 4) - num);
480 printf(ESC
"[%uD", num
);
484 /* Need to go one or more lines up */
485 if (ENABLE_UNICODE_WIDE_WCHARS
) {
486 /* With wide chars, it is hard to "backtrack"
487 * and reliably figure out where to put cursor.
488 * Example (<> is a wide char; # is an ordinary char, _ cursor):
492 * and user presses left arrow. num = 1, cmdedit_x = 0,
493 * We need to go up one line, and then - how do we know that
494 * we need to go *10* positions to the right? Because
498 * in this situation we need to go *11* positions to the right.
500 * A simpler thing to do is to redraw everything from the start
501 * up to new cursor position (which is already known):
504 /* go to 1st column; go up to first line */
505 printf("\r" ESC
"[%uA", cmdedit_y
);
508 put_prompt(); /* sets cursor to 0 */
509 while (cursor
< sv_cursor
)
510 put_cur_glyph_and_inc_cursor();
514 /* num = chars to go back from the beginning of current line: */
516 width
= cmdedit_termw
; /* read volatile var once */
517 /* num=1...w: one line up, w+1...2w: two, etc: */
518 lines_up
= 1 + (num
- 1) / width
;
519 cmdedit_x
= (width
* cmdedit_y
- num
) % width
;
520 cmdedit_y
-= lines_up
;
521 /* go to 1st column; go up */
522 printf("\r" ESC
"[%uA", lines_up
);
523 /* go to correct column.
524 * xterm, konsole, Linux VT interpret 0 as 1 below! wow.
525 * need to *make sure* we skip it if cmdedit_x == 0 */
527 printf(ESC
"[%uC", cmdedit_x
);
531 /* draw prompt, editor line, and clear tail */
532 static void redraw(int y
, int back_cursor
)
534 if (y
> 0) /* up y lines */
535 printf(ESC
"[%uA", y
);
538 put_till_end_and_adv_cursor();
539 printf(SEQ_CLEAR_TILL_END_OF_SCREEN
);
540 input_backward(back_cursor
);
543 /* Delete the char in front of the cursor, optionally saving it
544 * for later putback */
545 #if !ENABLE_FEATURE_EDITING_VI
546 static void input_delete(void)
547 #define input_delete(save) input_delete()
549 static void input_delete(int save
)
554 if (j
== (int)command_len
)
557 #if ENABLE_FEATURE_EDITING_VI
563 if ((delptr
- delbuf
) < DELBUFSIZ
)
564 *delptr
++ = command_ps
[j
];
568 memmove(command_ps
+ j
, command_ps
+ j
+ 1,
569 /* (command_len + 1 [because of NUL]) - (j + 1)
570 * simplified into (command_len - j) */
571 (command_len
- j
) * sizeof(command_ps
[0]));
573 put_till_end_and_adv_cursor();
574 /* Last char is still visible, erase it (and more) */
575 printf(SEQ_CLEAR_TILL_END_OF_SCREEN
);
576 input_backward(cursor
- j
); /* back to old pos cursor */
579 #if ENABLE_FEATURE_EDITING_VI
580 static void put(void)
583 int j
= delptr
- delbuf
;
588 /* open hole and then fill it */
589 memmove(command_ps
+ cursor
+ j
, command_ps
+ cursor
,
590 (command_len
- cursor
+ 1) * sizeof(command_ps
[0]));
591 memcpy(command_ps
+ cursor
, delbuf
, j
* sizeof(command_ps
[0]));
593 put_till_end_and_adv_cursor();
594 input_backward(cursor
- ocursor
- j
+ 1); /* at end of new text */
598 /* Delete the char in back of the cursor */
599 static void input_backspace(void)
607 /* Move forward one character */
608 static void input_forward(void)
610 if (cursor
< command_len
)
611 put_cur_glyph_and_inc_cursor();
614 #if ENABLE_FEATURE_TAB_COMPLETION
617 //needs to be more clever: currently it thinks that "foo\ b<TAB>
618 //matches the file named "foo bar", which is untrue.
619 //Also, perhaps "foo b<TAB> needs to complete to "foo bar" <cursor>,
620 //not "foo bar <cursor>...
622 static void free_tab_completion_data(void)
626 free(matches
[--num_matches
]);
632 static void add_match(char *matched
)
634 matches
= xrealloc_vector(matches
, 4, num_matches
);
635 matches
[num_matches
] = matched
;
639 # if ENABLE_FEATURE_USERNAME_COMPLETION
640 /* Replace "~user/..." with "/homedir/...".
641 * The parameter is malloced, free it or return it
642 * unchanged if no user is matched.
644 static char *username_path_completion(char *ud
)
646 struct passwd
*entry
;
647 char *tilde_name
= ud
;
651 if (*ud
== '/') { /* "~/..." */
655 ud
= strchr(ud
, '/');
656 *ud
= '\0'; /* "~user" */
657 entry
= getpwnam(tilde_name
+ 1);
658 *ud
= '/'; /* restore "~user/..." */
660 home
= entry
->pw_dir
;
663 ud
= concat_path_file(home
, ud
);
670 /* ~use<tab> - find all users with this prefix.
671 * Return the length of the prefix used for matching.
673 static NOINLINE
unsigned complete_username(const char *ud
)
675 /* Using _r function to avoid pulling in static buffers */
678 struct passwd
*result
;
682 userlen
= strlen(ud
);
685 while (!getpwent_r(&pwd
, line_buff
, sizeof(line_buff
), &result
)) {
686 /* Null usernames should result in all users as possible completions. */
687 if (/*!userlen || */ strncmp(ud
, pwd
.pw_name
, userlen
) == 0) {
688 add_match(xasprintf("~%s/", pwd
.pw_name
));
695 # endif /* FEATURE_USERNAME_COMPLETION */
703 static int path_parse(char ***p
)
710 if (state
->flags
& WITH_PATH_LOOKUP
)
711 pth
= state
->path_lookup
;
713 pth
= getenv("PATH");
715 /* PATH="" or PATH=":"? */
716 if (!pth
|| !pth
[0] || LONE_CHAR(pth
, ':'))
720 npth
= 1; /* path component count */
722 tmp
= strchr(tmp
, ':');
727 break; /* :<empty> */
731 *p
= res
= xmalloc(npth
* sizeof(res
[0]));
732 res
[0] = tmp
= xstrdup(pth
);
735 tmp
= strchr(tmp
, ':');
738 *tmp
++ = '\0'; /* ':' -> '\0' */
740 break; /* :<empty> */
746 /* Complete command, directory or file name.
747 * Return the length of the prefix used for matching.
749 static NOINLINE
unsigned complete_cmd_dir_file(const char *command
, int type
)
752 char **paths
= path1
;
760 path1
[0] = (char*)".";
762 pfind
= strrchr(command
, '/');
764 if (type
== FIND_EXE_ONLY
)
765 npaths
= path_parse(&paths
);
768 /* point to 'l' in "..../last_component" */
770 /* dirbuf = ".../.../.../" */
771 dirbuf
= xstrndup(command
, pfind
- command
);
772 # if ENABLE_FEATURE_USERNAME_COMPLETION
773 if (dirbuf
[0] == '~') /* ~/... or ~user/... */
774 dirbuf
= username_path_completion(dirbuf
);
778 pf_len
= strlen(pfind
);
780 for (i
= 0; i
< npaths
; i
++) {
786 dir
= opendir(paths
[i
]);
788 continue; /* don't print an error */
790 while ((next
= readdir(dir
)) != NULL
) {
792 const char *name_found
= next
->d_name
;
794 /* .../<tab>: bash 3.2.0 shows dotfiles, but not . and .. */
795 if (!pfind
[0] && DOT_OR_DOTDOT(name_found
))
798 if (strncmp(name_found
, pfind
, pf_len
) != 0)
801 found
= concat_path_file(paths
[i
], name_found
);
802 /* NB: stat() first so that we see is it a directory;
803 * but if that fails, use lstat() so that
804 * we still match dangling links */
805 if (stat(found
, &st
) && lstat(found
, &st
))
806 goto cont
; /* hmm, remove in progress? */
809 len
= strlen(name_found
);
810 found
= xrealloc(found
, len
+ 2); /* +2: for slash and NUL */
811 strcpy(found
, name_found
);
813 if (S_ISDIR(st
.st_mode
)) {
814 /* name is a directory, add slash */
816 found
[len
+ 1] = '\0';
818 /* skip files if looking for dirs only (example: cd) */
819 if (type
== FIND_DIR_ONLY
)
822 /* add it to the list */
829 } /* for every path */
831 if (paths
!= path1
) {
832 free(paths
[0]); /* allocated memory is only in first member */
840 /* build_match_prefix:
841 * On entry, match_buf contains everything up to cursor at the moment <tab>
842 * was pressed. This function looks at it, figures out what part of it
843 * constitutes the command/file/directory prefix to use for completion,
844 * and rewrites match_buf to contain only that part.
848 /* QUOT is used on elements of int_buf[], which are bytes,
849 * not Unicode chars. Therefore it works correctly even in Unicode mode.
851 #define QUOT (UCHAR_MAX+1)
852 static void remove_chunk(int16_t *int_buf
, int beg
, int end
)
854 /* beg must be <= end */
858 while ((int_buf
[beg
] = int_buf
[end
]) != 0)
863 for (i
= 0; int_buf
[i
]; i
++)
864 bb_putchar((unsigned char)int_buf
[i
]);
868 /* Caller ensures that match_buf points to a malloced buffer
869 * big enough to hold strlen(match_buf)*2 + 2
871 static NOINLINE
int build_match_prefix(char *match_buf
)
875 int16_t *int_buf
= (int16_t*)match_buf
;
877 if (dbg_bmp
) printf("\n%s\n", match_buf
);
879 /* Copy in reverse order, since they overlap */
880 i
= strlen(match_buf
);
882 int_buf
[i
] = (unsigned char)match_buf
[i
];
886 /* Mark every \c as "quoted c" */
887 for (i
= 0; int_buf
[i
]; i
++) {
888 if (int_buf
[i
] == '\\') {
889 remove_chunk(int_buf
, i
, i
+ 1);
893 /* Quote-mark "chars" and 'chars', drop delimiters */
898 int cur
= int_buf
[i
];
901 if (cur
== '\'' || cur
== '"') {
902 if (!in_quote
|| (cur
== in_quote
)) {
904 remove_chunk(int_buf
, i
, i
+ 1);
909 int_buf
[i
] = cur
| QUOT
;
914 /* Remove everything up to command delimiters:
915 * ';' ';;' '&' '|' '&&' '||',
916 * but careful with '>&' '<&' '>|'
918 for (i
= 0; int_buf
[i
]; i
++) {
919 int cur
= int_buf
[i
];
920 if (cur
== ';' || cur
== '&' || cur
== '|') {
921 int prev
= i
? int_buf
[i
- 1] : 0;
922 if (cur
== '&' && (prev
== '>' || prev
== '<')) {
924 } else if (cur
== '|' && prev
== '>') {
927 remove_chunk(int_buf
, 0, i
+ 1 + (cur
== int_buf
[i
+ 1]));
928 i
= -1; /* back to square 1 */
931 /* Remove all `cmd` */
932 for (i
= 0; int_buf
[i
]; i
++) {
933 if (int_buf
[i
] == '`') {
934 for (j
= i
+ 1; int_buf
[j
]; j
++) {
935 if (int_buf
[j
] == '`') {
936 /* `cmd` should count as a word:
937 * `cmd` c<tab> should search for files c*,
938 * not commands c*. Therefore we don't drop
939 * `cmd` entirely, we replace it with single `.
941 remove_chunk(int_buf
, i
, j
);
945 /* No closing ` - command mode, remove all up to ` */
946 remove_chunk(int_buf
, 0, i
+ 1);
952 /* Remove "cmd (" and "cmd {"
953 * Example: "if { c<tab>"
954 * In this example, c should be matched as command pfx.
956 for (i
= 0; int_buf
[i
]; i
++) {
957 if (int_buf
[i
] == '(' || int_buf
[i
] == '{') {
958 remove_chunk(int_buf
, 0, i
+ 1);
959 i
= -1; /* back to square 1 */
963 /* Remove leading unquoted spaces */
964 for (i
= 0; int_buf
[i
]; i
++)
965 if (int_buf
[i
] != ' ')
967 remove_chunk(int_buf
, 0, i
);
969 /* Determine completion mode */
970 command_mode
= FIND_EXE_ONLY
;
971 for (i
= 0; int_buf
[i
]; i
++) {
972 if (int_buf
[i
] == ' ' || int_buf
[i
] == '<' || int_buf
[i
] == '>') {
973 if (int_buf
[i
] == ' '
974 && command_mode
== FIND_EXE_ONLY
975 && (char)int_buf
[0] == 'c'
976 && (char)int_buf
[1] == 'd'
977 && i
== 2 /* -> int_buf[2] == ' ' */
979 command_mode
= FIND_DIR_ONLY
;
981 command_mode
= FIND_FILE_ONLY
;
986 if (dbg_bmp
) printf("command_mode(0:exe/1:dir/2:file):%d\n", command_mode
);
988 /* Remove everything except last word */
989 for (i
= 0; int_buf
[i
]; i
++) /* quasi-strlen(int_buf) */
991 for (--i
; i
>= 0; i
--) {
992 int cur
= int_buf
[i
];
993 if (cur
== ' ' || cur
== '<' || cur
== '>' || cur
== '|' || cur
== '&') {
994 remove_chunk(int_buf
, 0, i
+ 1);
999 /* Convert back to string of _chars_ */
1001 while ((match_buf
[i
] = int_buf
[i
]) != '\0')
1004 if (dbg_bmp
) printf("final match_buf:'%s'\n", match_buf
);
1006 return command_mode
;
1010 * Display by column (original idea from ls applet,
1011 * very optimized by me [Vladimir] :)
1013 static void showfiles(void)
1016 int column_width
= 0;
1017 int nfiles
= num_matches
;
1021 /* find the longest file name - use that as the column width */
1022 for (row
= 0; row
< nrows
; row
++) {
1023 l
= unicode_strwidth(matches
[row
]);
1024 if (column_width
< l
)
1027 column_width
+= 2; /* min space for columns */
1028 ncols
= cmdedit_termw
/ column_width
;
1033 nrows
++; /* round up fractionals */
1037 for (row
= 0; row
< nrows
; row
++) {
1041 for (nc
= 1; nc
< ncols
&& n
+nrows
< nfiles
; n
+= nrows
, nc
++) {
1042 printf("%s%-*s", matches
[n
],
1043 (int)(column_width
- unicode_strwidth(matches
[n
])), ""
1046 if (ENABLE_UNICODE_SUPPORT
)
1047 puts(printable_string(NULL
, matches
[n
]));
1053 static const char *is_special_char(char c
)
1055 return strchr(" `\"#$%^&*()=+{}[]:;'|\\<>", c
);
1058 static char *quote_special_chars(char *found
)
1061 char *s
= xzalloc((strlen(found
) + 1) * 2);
1064 if (is_special_char(*found
))
1068 /* s[l] = '\0'; - already is */
1072 /* Do TAB completion */
1073 static NOINLINE
void input_tab(smallint
*lastWasTab
)
1078 /* Length of string used for matching */
1079 unsigned match_pfx_len
= match_pfx_len
;
1081 # if ENABLE_UNICODE_SUPPORT
1082 /* cursor pos in command converted to multibyte form */
1085 if (!(state
->flags
& TAB_COMPLETION
))
1089 /* The last char was a TAB too.
1090 * Print a list of all the available choices.
1092 if (num_matches
> 0) {
1093 /* cursor will be changed by goto_new_line() */
1094 int sav_cursor
= cursor
;
1097 redraw(0, command_len
- sav_cursor
);
1103 chosen_match
= NULL
;
1105 /* Make a local copy of the string up to the position of the cursor.
1106 * build_match_prefix will expand it into int16_t's, need to allocate
1107 * twice as much as the string_len+1.
1108 * (we then also (ab)use this extra space later - see (**))
1110 match_buf
= xmalloc(MAX_LINELEN
* sizeof(int16_t));
1111 # if !ENABLE_UNICODE_SUPPORT
1112 save_string(match_buf
, cursor
+ 1); /* +1 for NUL */
1115 CHAR_T wc
= command_ps
[cursor
];
1116 command_ps
[cursor
] = BB_NUL
;
1117 save_string(match_buf
, MAX_LINELEN
);
1118 command_ps
[cursor
] = wc
;
1119 cursor_mb
= strlen(match_buf
);
1122 find_type
= build_match_prefix(match_buf
);
1124 /* Free up any memory already allocated */
1125 free_tab_completion_data();
1127 # if ENABLE_FEATURE_USERNAME_COMPLETION
1128 /* If the word starts with ~ and there is no slash in the word,
1129 * then try completing this word as a username. */
1130 if (state
->flags
& USERNAME_COMPLETION
)
1131 if (match_buf
[0] == '~' && strchr(match_buf
, '/') == NULL
)
1132 match_pfx_len
= complete_username(match_buf
);
1134 /* If complete_username() did not match,
1135 * try to match a command in $PATH, or a directory, or a file */
1137 match_pfx_len
= complete_cmd_dir_file(match_buf
, find_type
);
1139 /* Account for backslashes which will be inserted
1140 * by quote_special_chars() later */
1142 const char *e
= match_buf
+ strlen(match_buf
);
1143 const char *s
= e
- match_pfx_len
;
1145 if (is_special_char(*s
++))
1149 /* Remove duplicates */
1152 qsort_string_vector(matches
, num_matches
);
1153 for (i
= 0; i
< num_matches
- 1; ++i
) {
1154 //if (matches[i] && matches[i+1]) { /* paranoia */
1155 if (strcmp(matches
[i
], matches
[i
+1]) == 0) {
1157 //matches[i] = NULL; /* paranoia */
1159 matches
[n
++] = matches
[i
];
1163 matches
[n
++] = matches
[i
];
1167 /* Did we find exactly one match? */
1168 if (num_matches
!= 1) { /* no */
1172 goto ret
; /* no matches at all */
1173 /* Find common prefix */
1174 chosen_match
= xstrdup(matches
[0]);
1175 for (cp
= chosen_match
; *cp
; cp
++) {
1177 for (n
= 1; n
< num_matches
; n
++) {
1178 if (matches
[n
][cp
- chosen_match
] != *cp
) {
1184 if (cp
== chosen_match
) { /* have unique prefix? */
1188 cp
= quote_special_chars(chosen_match
);
1191 len_found
= strlen(chosen_match
);
1192 } else { /* exactly one match */
1193 /* Next <tab> is not a double-tab */
1196 chosen_match
= quote_special_chars(matches
[0]);
1197 len_found
= strlen(chosen_match
);
1198 if (chosen_match
[len_found
-1] != '/') {
1199 chosen_match
[len_found
] = ' ';
1200 chosen_match
[++len_found
] = '\0';
1204 # if !ENABLE_UNICODE_SUPPORT
1205 /* Have space to place the match? */
1206 /* The result consists of three parts with these lengths: */
1207 /* cursor + (len_found - match_pfx_len) + (command_len - cursor) */
1208 /* it simplifies into: */
1209 if ((int)(len_found
- match_pfx_len
+ command_len
) < S
.maxsize
) {
1212 strcpy(match_buf
, &command_ps
[cursor
]);
1213 /* add match and tail */
1214 sprintf(&command_ps
[cursor
], "%s%s", chosen_match
+ match_pfx_len
, match_buf
);
1215 command_len
= strlen(command_ps
);
1217 pos
= cursor
+ len_found
- match_pfx_len
;
1218 /* write out the matched command */
1219 redraw(cmdedit_y
, command_len
- pos
);
1223 /* Use 2nd half of match_buf as scratch space - see (**) */
1224 char *command
= match_buf
+ MAX_LINELEN
;
1225 int len
= save_string(command
, MAX_LINELEN
);
1226 /* Have space to place the match? */
1227 /* cursor_mb + (len_found - match_pfx_len) + (len - cursor_mb) */
1228 if ((int)(len_found
- match_pfx_len
+ len
) < MAX_LINELEN
) {
1231 strcpy(match_buf
, &command
[cursor_mb
]);
1232 /* where do we want to have cursor after all? */
1233 strcpy(&command
[cursor_mb
], chosen_match
+ match_pfx_len
);
1234 len
= load_string(command
);
1235 /* add match and tail */
1236 sprintf(&command
[cursor_mb
], "%s%s", chosen_match
+ match_pfx_len
, match_buf
);
1237 command_len
= load_string(command
);
1238 /* write out the matched command */
1239 /* paranoia: load_string can return 0 on conv error,
1240 * prevent passing pos = (0 - 12) to redraw */
1241 pos
= command_len
- len
;
1242 redraw(cmdedit_y
, pos
>= 0 ? pos
: 0);
1251 #endif /* FEATURE_TAB_COMPLETION */
1254 line_input_t
* FAST_FUNC
new_line_input_t(int flags
)
1256 line_input_t
*n
= xzalloc(sizeof(*n
));
1259 n
->max_history
= MAX_HISTORY
;
1267 unsigned FAST_FUNC
size_from_HISTFILESIZE(const char *hp
)
1269 int size
= MAX_HISTORY
;
1274 if (size
> MAX_HISTORY
)
1280 static void save_command_ps_at_cur_history(void)
1282 if (command_ps
[0] != BB_NUL
) {
1283 int cur
= state
->cur_history
;
1284 free(state
->history
[cur
]);
1286 # if ENABLE_UNICODE_SUPPORT
1288 char tbuf
[MAX_LINELEN
];
1289 save_string(tbuf
, sizeof(tbuf
));
1290 state
->history
[cur
] = xstrdup(tbuf
);
1293 state
->history
[cur
] = xstrdup(command_ps
);
1298 /* state->flags is already checked to be nonzero */
1299 static int get_previous_history(void)
1301 if ((state
->flags
& DO_HISTORY
) && state
->cur_history
) {
1302 save_command_ps_at_cur_history();
1303 state
->cur_history
--;
1310 static int get_next_history(void)
1312 if (state
->flags
& DO_HISTORY
) {
1313 if (state
->cur_history
< state
->cnt_history
) {
1314 save_command_ps_at_cur_history(); /* save the current history line */
1315 return ++state
->cur_history
;
1322 /* Lists command history. Used by shell 'history' builtins */
1323 void FAST_FUNC
show_history(const line_input_t
*st
)
1329 for (i
= 0; i
< st
->cnt_history
; i
++)
1330 printf("%4d %s\n", i
, st
->history
[i
]);
1333 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
1334 /* We try to ensure that concurrent additions to the history
1335 * do not overwrite each other.
1336 * Otherwise shell users get unhappy.
1338 * History file is trimmed lazily, when it grows several times longer
1339 * than configured MAX_HISTORY lines.
1342 static void free_line_input_t(line_input_t
*n
)
1344 int i
= n
->cnt_history
;
1346 free(n
->history
[--i
]);
1350 /* state->flags is already checked to be nonzero */
1351 static void load_history(line_input_t
*st_parm
)
1353 char *temp_h
[MAX_HISTORY
];
1356 unsigned idx
, i
, line_len
;
1358 /* NB: do not trash old history if file can't be opened */
1360 fp
= fopen_for_read(st_parm
->hist_file
);
1362 /* clean up old history */
1363 for (idx
= st_parm
->cnt_history
; idx
> 0;) {
1365 free(st_parm
->history
[idx
]);
1366 st_parm
->history
[idx
] = NULL
;
1369 /* fill temp_h[], retaining only last MAX_HISTORY lines */
1370 memset(temp_h
, 0, sizeof(temp_h
));
1372 st_parm
->cnt_history_in_file
= 0;
1373 while ((line
= xmalloc_fgetline(fp
)) != NULL
) {
1374 if (line
[0] == '\0') {
1380 st_parm
->cnt_history_in_file
++;
1382 if (idx
== st_parm
->max_history
)
1387 /* find first non-NULL temp_h[], if any */
1388 if (st_parm
->cnt_history_in_file
) {
1389 while (temp_h
[idx
] == NULL
) {
1391 if (idx
== st_parm
->max_history
)
1396 /* copy temp_h[] to st_parm->history[] */
1397 for (i
= 0; i
< st_parm
->max_history
;) {
1402 if (idx
== st_parm
->max_history
)
1404 line_len
= strlen(line
);
1405 if (line_len
>= MAX_LINELEN
)
1406 line
[MAX_LINELEN
-1] = '\0';
1407 st_parm
->history
[i
++] = line
;
1409 st_parm
->cnt_history
= i
;
1410 if (ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
)
1411 st_parm
->cnt_history_in_file
= i
;
1415 # if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1416 void save_history(line_input_t
*st
)
1422 if (st
->cnt_history
<= st
->cnt_history_in_file
)
1425 fp
= fopen(st
->hist_file
, "a");
1429 line_input_t
*st_temp
;
1431 for (i
= st
->cnt_history_in_file
; i
< st
->cnt_history
; i
++)
1432 fprintf(fp
, "%s\n", st
->history
[i
]);
1435 /* we may have concurrently written entries from others.
1437 st_temp
= new_line_input_t(st
->flags
);
1438 st_temp
->hist_file
= st
->hist_file
;
1439 st_temp
->max_history
= st
->max_history
;
1440 load_history(st_temp
);
1442 /* write out temp file and replace hist_file atomically */
1443 new_name
= xasprintf("%s.%u.new", st
->hist_file
, (int) getpid());
1444 fd
= open(new_name
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0600);
1446 fp
= xfdopen_for_write(fd
);
1447 for (i
= 0; i
< st_temp
->cnt_history
; i
++)
1448 fprintf(fp
, "%s\n", st_temp
->history
[i
]);
1450 if (rename(new_name
, st
->hist_file
) == 0)
1451 st
->cnt_history_in_file
= st_temp
->cnt_history
;
1454 free_line_input_t(st_temp
);
1458 static void save_history(char *str
)
1463 if (!state
->hist_file
)
1466 fd
= open(state
->hist_file
, O_WRONLY
| O_CREAT
| O_APPEND
, 0600);
1469 xlseek(fd
, 0, SEEK_END
); /* paranoia */
1471 str
[len
] = '\n'; /* we (try to) do atomic write */
1472 len2
= full_write(fd
, str
, len
+ 1);
1475 if (len2
!= len
+ 1)
1476 return; /* "wtf?" */
1478 /* did we write so much that history file needs trimming? */
1479 state
->cnt_history_in_file
++;
1480 if (state
->cnt_history_in_file
> state
->max_history
* 4) {
1482 line_input_t
*st_temp
;
1484 /* we may have concurrently written entries from others.
1486 st_temp
= new_line_input_t(state
->flags
);
1487 st_temp
->hist_file
= state
->hist_file
;
1488 st_temp
->max_history
= state
->max_history
;
1489 load_history(st_temp
);
1491 /* write out temp file and replace hist_file atomically */
1492 new_name
= xasprintf("%s.%u.new", state
->hist_file
, (int) getpid());
1493 fd
= open(new_name
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0600);
1498 fp
= xfdopen_for_write(fd
);
1499 for (i
= 0; i
< st_temp
->cnt_history
; i
++)
1500 fprintf(fp
, "%s\n", st_temp
->history
[i
]);
1502 if (rename(new_name
, state
->hist_file
) == 0)
1503 state
->cnt_history_in_file
= st_temp
->cnt_history
;
1506 free_line_input_t(st_temp
);
1511 # define load_history(a) ((void)0)
1512 # define save_history(a) ((void)0)
1513 # endif /* FEATURE_COMMAND_SAVEHISTORY */
1515 static void remember_in_history(char *str
)
1519 if (!(state
->flags
& DO_HISTORY
))
1523 i
= state
->cnt_history
;
1524 /* Don't save dupes */
1525 if (i
&& strcmp(state
->history
[i
-1], str
) == 0)
1528 free(state
->history
[state
->max_history
]); /* redundant, paranoia */
1529 state
->history
[state
->max_history
] = NULL
; /* redundant, paranoia */
1531 /* If history[] is full, remove the oldest command */
1532 /* we need to keep history[state->max_history] empty, hence >=, not > */
1533 if (i
>= state
->max_history
) {
1534 free(state
->history
[0]);
1535 for (i
= 0; i
< state
->max_history
-1; i
++)
1536 state
->history
[i
] = state
->history
[i
+1];
1537 /* i == state->max_history-1 */
1538 # if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1539 if (state
->cnt_history_in_file
)
1540 state
->cnt_history_in_file
--;
1543 /* i <= state->max_history-1 */
1544 state
->history
[i
++] = xstrdup(str
);
1545 /* i <= state->max_history */
1546 state
->cur_history
= i
;
1547 state
->cnt_history
= i
;
1548 # if ENABLE_FEATURE_EDITING_SAVEHISTORY && !ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1553 #else /* MAX_HISTORY == 0 */
1554 # define remember_in_history(a) ((void)0)
1555 #endif /* MAX_HISTORY */
1558 #if ENABLE_FEATURE_EDITING_VI
1560 * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
1563 vi_Word_motion(int eat
)
1565 CHAR_T
*command
= command_ps
;
1567 while (cursor
< command_len
&& !BB_isspace(command
[cursor
]))
1569 if (eat
) while (cursor
< command_len
&& BB_isspace(command
[cursor
]))
1574 vi_word_motion(int eat
)
1576 CHAR_T
*command
= command_ps
;
1578 if (BB_isalnum(command
[cursor
]) || command
[cursor
] == '_') {
1579 while (cursor
< command_len
1580 && (BB_isalnum(command
[cursor
+1]) || command
[cursor
+1] == '_')
1584 } else if (BB_ispunct(command
[cursor
])) {
1585 while (cursor
< command_len
&& BB_ispunct(command
[cursor
+1]))
1589 if (cursor
< command_len
)
1593 while (cursor
< command_len
&& BB_isspace(command
[cursor
]))
1601 CHAR_T
*command
= command_ps
;
1604 while (cursor
< command_len
&& BB_isspace(command
[cursor
]))
1606 while (cursor
< command_len
-1 && !BB_isspace(command
[cursor
+1]))
1613 CHAR_T
*command
= command_ps
;
1615 if (cursor
>= command_len
-1)
1618 while (cursor
< command_len
-1 && BB_isspace(command
[cursor
]))
1620 if (cursor
>= command_len
-1)
1622 if (BB_isalnum(command
[cursor
]) || command
[cursor
] == '_') {
1623 while (cursor
< command_len
-1
1624 && (BB_isalnum(command
[cursor
+1]) || command
[cursor
+1] == '_')
1628 } else if (BB_ispunct(command
[cursor
])) {
1629 while (cursor
< command_len
-1 && BB_ispunct(command
[cursor
+1]))
1635 vi_Back_motion(void)
1637 CHAR_T
*command
= command_ps
;
1639 while (cursor
> 0 && BB_isspace(command
[cursor
-1]))
1641 while (cursor
> 0 && !BB_isspace(command
[cursor
-1]))
1646 vi_back_motion(void)
1648 CHAR_T
*command
= command_ps
;
1653 while (cursor
> 0 && BB_isspace(command
[cursor
]))
1657 if (BB_isalnum(command
[cursor
]) || command
[cursor
] == '_') {
1659 && (BB_isalnum(command
[cursor
-1]) || command
[cursor
-1] == '_')
1663 } else if (BB_ispunct(command
[cursor
])) {
1664 while (cursor
> 0 && BB_ispunct(command
[cursor
-1]))
1670 /* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
1671 static void ctrl_left(void)
1673 CHAR_T
*command
= command_ps
;
1681 c
= command
[cursor
];
1682 if (c
!= ' ' && !BB_ispunct(c
)) {
1683 /* we reached a "word" delimited by spaces/punct.
1684 * go to its beginning */
1686 c
= command
[cursor
- 1];
1687 if (c
== ' ' || BB_ispunct(c
))
1697 static void ctrl_right(void)
1699 CHAR_T
*command
= command_ps
;
1704 c
= command
[cursor
];
1707 if (c
!= ' ' && !BB_ispunct(c
)) {
1708 /* we reached a "word" delimited by spaces/punct.
1709 * go to its end + 1 */
1712 c
= command
[cursor
];
1713 if (c
== BB_NUL
|| c
== ' ' || BB_ispunct(c
))
1724 * read_line_input and its helpers
1727 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
1728 static void ask_terminal(void)
1730 /* Ask terminal where is the cursor now.
1731 * lineedit_read_key handles response and corrects
1732 * our idea of current cursor position.
1733 * Testcase: run "echo -n long_line_long_line_long_line",
1734 * then type in a long, wrapping command and try to
1735 * delete it using backspace key.
1736 * Note: we print it _after_ prompt, because
1737 * prompt may contain CR. Example: PS1='\[\r\n\]\w '
1739 /* Problem: if there is buffered input on stdin,
1740 * the response will be delivered later,
1741 * possibly to an unsuspecting application.
1742 * Testcase: "sleep 1; busybox ash" + press and hold [Enter].
1744 * ~/srcdevel/bbox/fix/busybox.t4 #
1745 * ~/srcdevel/bbox/fix/busybox.t4 #
1746 * ^[[59;34~/srcdevel/bbox/fix/busybox.t4 # <-- garbage
1747 * ~/srcdevel/bbox/fix/busybox.t4 #
1749 * Checking for input with poll only makes the race narrower,
1750 * I still can trigger it. Strace:
1752 * write(1, "~/srcdevel/bbox/fix/busybox.t4 # ", 33) = 33
1753 * poll([{fd=0, events=POLLIN}], 1, 0) = 0 (Timeout) <-- no input exists
1754 * write(1, "\33[6n", 4) = 4 <-- send the ESC sequence, quick!
1755 * poll([{fd=0, events=POLLIN}], 1, -1) = 1 ([{fd=0, revents=POLLIN}])
1756 * read(0, "\n", 1) = 1 <-- oh crap, user's input got in first
1760 pfd
.fd
= STDIN_FILENO
;
1761 pfd
.events
= POLLIN
;
1762 if (safe_poll(&pfd
, 1, 0) == 0) {
1763 S
.sent_ESC_br6n
= 1;
1764 fputs(ESC
"[6n", stdout
);
1765 fflush_all(); /* make terminal see it ASAP! */
1769 #define ask_terminal() ((void)0)
1772 /* Called just once at read_line_input() init time */
1773 #if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
1774 static void parse_and_put_prompt(const char *prmt_ptr
)
1777 cmdedit_prompt
= prmt_ptr
;
1778 p
= strrchr(prmt_ptr
, '\n');
1779 cmdedit_prmt_len
= unicode_strwidth(p
? p
+1 : prmt_ptr
);
1783 static void parse_and_put_prompt(const char *prmt_ptr
)
1786 char *prmt_mem_ptr
= xzalloc(1);
1787 # if ENABLE_USERNAME_OR_HOMEDIR
1788 char *cwd_buf
= NULL
;
1790 char flg_not_length
= '[';
1793 /*cmdedit_prmt_len = 0; - already is */
1795 cbuf
[1] = '\0'; /* never changes */
1798 char timebuf
[sizeof("HH:MM:SS")];
1799 char *free_me
= NULL
;
1809 * Supported via bb_process_escape_sequence:
1810 * \a ASCII bell character (07)
1811 * \e ASCII escape character (033)
1813 * \r carriage return
1815 * \nnn char with octal code nnn
1817 * \$ if the effective UID is 0, a #, otherwise a $
1818 * \w current working directory, with $HOME abbreviated with a tilde
1819 * Note: we do not support $PROMPT_DIRTRIM=n feature
1820 * \W basename of the current working directory, with $HOME abbreviated with a tilde
1821 * \h hostname up to the first '.'
1824 * \[ begin a sequence of non-printing characters
1825 * \] end a sequence of non-printing characters
1826 * \T current time in 12-hour HH:MM:SS format
1827 * \@ current time in 12-hour am/pm format
1828 * \A current time in 24-hour HH:MM format
1829 * \t current time in 24-hour HH:MM:SS format
1830 * (all of the above work as \A)
1832 * \! history number of this command
1833 * \# command number of this command
1834 * \j number of jobs currently managed by the shell
1835 * \l basename of the shell's terminal device name
1836 * \s name of the shell, the basename of $0 (the portion following the final slash)
1837 * \V release of bash, version + patch level (e.g., 2.00.0)
1838 * \d date in "Weekday Month Date" format (e.g., "Tue May 26")
1840 * format is passed to strftime(3).
1841 * An empty format results in a locale-specific time representation.
1842 * The braces are required.
1843 * Mishandled by bb_process_escape_sequence:
1844 * \v version of bash (e.g., 2.00)
1848 if (c
!= 't') /* don't treat \t as tab */
1849 c
= bb_process_escape_sequence(&prmt_ptr
);
1850 if (prmt_ptr
== cp
) {
1856 # if ENABLE_USERNAME_OR_HOMEDIR
1858 pbuf
= user_buf
? user_buf
: (char*)"";
1863 pbuf
= free_me
= safe_gethostname();
1865 strchrnul(pbuf
, '.')[0] = '\0';
1868 c
= (geteuid() == 0 ? '#' : '$');
1870 case 'T': /* 12-hour HH:MM:SS format */
1871 case '@': /* 12-hour am/pm format */
1872 case 'A': /* 24-hour HH:MM format */
1873 case 't': /* 24-hour HH:MM:SS format */
1874 /* We show all of them as 24-hour HH:MM */
1875 strftime_HHMMSS(timebuf
, sizeof(timebuf
), NULL
)[-3] = '\0';
1878 # if ENABLE_USERNAME_OR_HOMEDIR
1879 case 'w': /* current dir */
1880 case 'W': /* basename of cur dir */
1882 cwd_buf
= xrealloc_getcwd_or_warn(NULL
);
1884 cwd_buf
= (char *)bb_msg_unknown
;
1886 /* /home/user[/something] -> ~[/something] */
1887 l
= strlen(home_pwd_buf
);
1889 && strncmp(home_pwd_buf
, cwd_buf
, l
) == 0
1890 && (cwd_buf
[l
] == '/' || cwd_buf
[l
] == '\0')
1893 overlapping_strcpy(cwd_buf
+ 1, cwd_buf
+ l
);
1900 cp
= strrchr(pbuf
, '/');
1902 pbuf
= (char*)cp
+ 1;
1905 // bb_process_escape_sequence does this now:
1906 // case 'e': case 'E': /* \e \E = \033 */
1909 case 'x': case 'X': {
1911 for (l
= 0; l
< 3;) {
1913 buf2
[l
++] = *prmt_ptr
;
1915 h
= strtoul(buf2
, &pbuf
, 16);
1916 if (h
> UCHAR_MAX
|| (pbuf
- buf2
) < l
) {
1922 c
= (char)strtoul(buf2
, NULL
, 16);
1929 if (c
== flg_not_length
) {
1930 /* Toggle '['/']' hex 5b/5d */
1931 flg_not_length
^= 6;
1940 int n
= strlen(pbuf
);
1943 cmdedit_prmt_len
= 0;
1944 else if (flg_not_length
!= ']') {
1945 #if 0 /*ENABLE_UNICODE_SUPPORT*/
1946 /* Won't work, pbuf is one BYTE string here instead of an one Unicode char string. */
1948 cmdedit_prmt_len
+= unicode_strwidth(pbuf
);
1950 cmdedit_prmt_len
+= n
;
1954 prmt_mem_ptr
= strcat(xrealloc(prmt_mem_ptr
, prmt_size
+1), pbuf
);
1958 # if ENABLE_USERNAME_OR_HOMEDIR
1959 if (cwd_buf
!= (char *)bb_msg_unknown
)
1962 cmdedit_prompt
= prmt_mem_ptr
;
1967 static void cmdedit_setwidth(unsigned w
, int redraw_flg
)
1971 /* new y for current cursor */
1972 int new_y
= (cursor
+ cmdedit_prmt_len
) / w
;
1974 redraw((new_y
>= cmdedit_y
? new_y
: cmdedit_y
), command_len
- cursor
);
1979 static void win_changed(int nsig
)
1981 int sv_errno
= errno
;
1984 get_terminal_width_height(0, &width
, NULL
);
1985 //FIXME: cmdedit_setwidth() -> redraw() -> printf() -> KABOOM! (we are in signal handler!)
1986 cmdedit_setwidth(width
, /*redraw_flg:*/ nsig
);
1991 static int lineedit_read_key(char *read_key_buffer
, int timeout
)
1994 #if ENABLE_UNICODE_SUPPORT
1995 char unicode_buf
[MB_CUR_MAX
+ 1];
1996 int unicode_idx
= 0;
2000 /* Wait for input. TIMEOUT = -1 makes read_key wait even
2001 * on nonblocking stdin, TIMEOUT = 50 makes sure we won't
2002 * insist on full MB_CUR_MAX buffer to declare input like
2003 * "\xff\n",pause,"ls\n" invalid and thus won't lose "ls".
2005 * Note: read_key sets errno to 0 on success.
2007 ic
= read_key(STDIN_FILENO
, read_key_buffer
, timeout
);
2009 #if ENABLE_UNICODE_SUPPORT
2010 if (errno
== EAGAIN
&& unicode_idx
!= 0)
2016 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
2017 if ((int32_t)ic
== KEYCODE_CURSOR_POS
2020 S
.sent_ESC_br6n
= 0;
2021 if (cursor
== 0) { /* otherwise it may be bogus */
2022 int col
= ((ic
>> 32) & 0x7fff) - 1;
2024 * Is col > cmdedit_prmt_len?
2025 * If yes (terminal says cursor is farther to the right
2026 * of where we think it should be),
2027 * the prompt wasn't printed starting at col 1,
2028 * there was additional text before it.
2030 if ((int)(col
- cmdedit_prmt_len
) > 0) {
2031 /* Fix our understanding of current x position */
2032 cmdedit_x
+= (col
- cmdedit_prmt_len
);
2033 while (cmdedit_x
>= cmdedit_termw
) {
2034 cmdedit_x
-= cmdedit_termw
;
2043 #if ENABLE_UNICODE_SUPPORT
2044 if (unicode_status
== UNICODE_ON
) {
2047 if ((int32_t)ic
< 0) /* KEYCODE_xxx */
2049 // TODO: imagine sequence like: 0xff,<left-arrow>: we are currently losing 0xff...
2051 unicode_buf
[unicode_idx
++] = ic
;
2052 unicode_buf
[unicode_idx
] = '\0';
2053 if (mbstowcs(&wc
, unicode_buf
, 1) != 1) {
2054 /* Not (yet?) a valid unicode char */
2055 if (unicode_idx
< MB_CUR_MAX
) {
2060 /* Invalid sequence. Save all "bad bytes" except first */
2061 read_key_ungets(read_key_buffer
, unicode_buf
+ 1, unicode_idx
- 1);
2062 # if !ENABLE_UNICODE_PRESERVE_BROKEN
2063 ic
= CONFIG_SUBST_WCHAR
;
2065 ic
= unicode_mark_raw_byte(unicode_buf
[0]);
2068 /* Valid unicode char, return its code */
2079 #if ENABLE_UNICODE_BIDI_SUPPORT
2080 static int isrtl_str(void)
2084 while (idx
< command_len
&& unicode_bidi_is_neutral_wchar(command_ps
[idx
]))
2086 return unicode_bidi_isrtl(command_ps
[idx
]);
2089 # define isrtl_str() 0
2092 /* leave out the "vi-mode"-only case labels if vi editing isn't
2094 #define vi_case(caselabel) IF_FEATURE_EDITING_VI(case caselabel)
2096 /* convert uppercase ascii to equivalent control char, for readability */
2098 #define CTRL(a) ((a) & ~0x40)
2101 VI_CMDMODE_BIT
= 0x40000000,
2102 /* 0x80000000 bit flags KEYCODE_xxx */
2105 #if ENABLE_FEATURE_REVERSE_SEARCH
2106 /* Mimic readline Ctrl-R reverse history search.
2107 * When invoked, it shows the following prompt:
2108 * (reverse-i-search)'': user_input [cursor pos unchanged by Ctrl-R]
2109 * and typing results in search being performed:
2110 * (reverse-i-search)'tmp': cd /tmp [cursor under t in /tmp]
2111 * Search is performed by looking at progressively older lines in history.
2112 * Ctrl-R again searches for the next match in history.
2113 * Backspace deletes last matched char.
2114 * Control keys exit search and return to normal editing (at current history line).
2116 static int32_t reverse_i_search(void)
2118 char match_buf
[128]; /* for user input */
2119 char read_key_buffer
[KEYCODE_BUFFER_SIZE
];
2120 const char *matched_history_line
;
2121 const char *saved_prompt
;
2122 unsigned saved_prmt_len
;
2125 matched_history_line
= NULL
;
2126 read_key_buffer
[0] = 0;
2127 match_buf
[0] = '\0';
2129 /* Save and replace the prompt */
2130 saved_prompt
= cmdedit_prompt
;
2131 saved_prmt_len
= cmdedit_prmt_len
;
2136 unsigned match_buf_len
= strlen(match_buf
);
2139 //FIXME: correct timeout?
2140 ic
= lineedit_read_key(read_key_buffer
, -1);
2143 case CTRL('R'): /* searching for the next match */
2149 if (unicode_status
== UNICODE_ON
) {
2150 while (match_buf_len
!= 0) {
2151 uint8_t c
= match_buf
[--match_buf_len
];
2152 if ((c
& 0xc0) != 0x80) /* start of UTF-8 char? */
2156 if (match_buf_len
!= 0)
2159 match_buf
[match_buf_len
] = '\0';
2164 || (!ENABLE_UNICODE_SUPPORT
&& ic
>= 256)
2165 || (ENABLE_UNICODE_SUPPORT
&& ic
>= VI_CMDMODE_BIT
)
2170 /* Append this char */
2171 #if ENABLE_UNICODE_SUPPORT
2172 if (unicode_status
== UNICODE_ON
) {
2173 mbstate_t mbstate
= { 0 };
2174 char buf
[MB_CUR_MAX
+ 1];
2175 int len
= wcrtomb(buf
, ic
, &mbstate
);
2178 if (match_buf_len
+ len
< sizeof(match_buf
))
2179 strcpy(match_buf
+ match_buf_len
, buf
);
2183 if (match_buf_len
< sizeof(match_buf
) - 1) {
2184 match_buf
[match_buf_len
] = ic
;
2185 match_buf
[match_buf_len
+ 1] = '\0';
2190 /* Search in history for match_buf */
2191 h
= state
->cur_history
;
2192 if (ic
== CTRL('R'))
2195 if (state
->history
[h
]) {
2196 char *match
= strstr(state
->history
[h
], match_buf
);
2198 state
->cur_history
= h
;
2199 matched_history_line
= state
->history
[h
];
2200 command_len
= load_string(matched_history_line
);
2201 cursor
= match
- matched_history_line
;
2202 //FIXME: cursor position for Unicode case
2204 free((char*)cmdedit_prompt
);
2206 cmdedit_prompt
= xasprintf("(reverse-i-search)'%s': ", match_buf
);
2207 cmdedit_prmt_len
= unicode_strwidth(cmdedit_prompt
);
2215 match_buf
[match_buf_len
] = '\0';
2220 redraw(cmdedit_y
, command_len
- cursor
);
2224 if (matched_history_line
)
2225 command_len
= load_string(matched_history_line
);
2227 free((char*)cmdedit_prompt
);
2228 cmdedit_prompt
= saved_prompt
;
2229 cmdedit_prmt_len
= saved_prmt_len
;
2230 redraw(cmdedit_y
, command_len
- cursor
);
2236 /* maxsize must be >= 2.
2238 * -1 on read errors or EOF, or on bare Ctrl-D,
2239 * 0 on ctrl-C (the line entered is still returned in 'command'),
2240 * >0 length of input string, including terminating '\n'
2242 int FAST_FUNC
read_line_input(line_input_t
*st
, const char *prompt
, char *command
, int maxsize
, int timeout
)
2245 #if ENABLE_FEATURE_TAB_COMPLETION
2246 smallint lastWasTab
= 0;
2248 smallint break_out
= 0;
2249 #if ENABLE_FEATURE_EDITING_VI
2250 smallint vi_cmdmode
= 0;
2252 struct termios initial_settings
;
2253 struct termios new_settings
;
2254 char read_key_buffer
[KEYCODE_BUFFER_SIZE
];
2258 if (tcgetattr(STDIN_FILENO
, &initial_settings
) < 0
2259 || (initial_settings
.c_lflag
& (ECHO
|ICANON
)) == ICANON
2261 /* Happens when e.g. stty -echo was run before.
2262 * But if ICANON is not set, we don't come here.
2263 * (example: interactive python ^Z-backgrounded,
2264 * tty is still in "raw mode").
2266 parse_and_put_prompt(prompt
);
2267 /* fflush_all(); - done by parse_and_put_prompt */
2268 if (fgets(command
, maxsize
, stdin
) == NULL
)
2269 len
= -1; /* EOF or error */
2271 len
= strlen(command
);
2278 // FIXME: audit & improve this
2279 if (maxsize
> MAX_LINELEN
)
2280 maxsize
= MAX_LINELEN
;
2281 S
.maxsize
= maxsize
;
2283 /* With zero flags, no other fields are ever used */
2284 state
= st
? st
: (line_input_t
*) &const_int_0
;
2286 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
2287 if (state
->hist_file
)
2288 if (state
->cnt_history
== 0)
2289 load_history(state
);
2291 if (state
->flags
& DO_HISTORY
)
2292 state
->cur_history
= state
->cnt_history
;
2295 /* prepare before init handlers */
2296 cmdedit_y
= 0; /* quasireal y, not true if line > xt*yt */
2298 #if ENABLE_UNICODE_SUPPORT
2299 command_ps
= xzalloc(maxsize
* sizeof(command_ps
[0]));
2301 command_ps
= command
;
2304 #define command command_must_not_be_used
2306 new_settings
= initial_settings
;
2307 /* ~ICANON: unbuffered input (most c_cc[] are disabled, VMIN/VTIME are enabled) */
2308 /* ~ECHO, ~ECHONL: turn off echoing, including newline echoing */
2309 /* ~ISIG: turn off INTR (ctrl-C), QUIT, SUSP */
2310 new_settings
.c_lflag
&= ~(ICANON
| ECHO
| ECHONL
| ISIG
);
2311 /* reads would block only if < 1 char is available */
2312 new_settings
.c_cc
[VMIN
] = 1;
2313 /* no timeout (reads block forever) */
2314 new_settings
.c_cc
[VTIME
] = 0;
2315 /* Should be not needed if ISIG is off: */
2316 /* Turn off CTRL-C */
2317 /* new_settings.c_cc[VINTR] = _POSIX_VDISABLE; */
2318 tcsetattr_stdin_TCSANOW(&new_settings
);
2320 #if ENABLE_USERNAME_OR_HOMEDIR
2322 struct passwd
*entry
;
2324 entry
= getpwuid(geteuid());
2326 user_buf
= xstrdup(entry
->pw_name
);
2327 home_pwd_buf
= xstrdup(entry
->pw_dir
);
2333 for (i
= 0; i
<= state
->max_history
; i
++)
2334 bb_error_msg("history[%d]:'%s'", i
, state
->history
[i
]);
2335 bb_error_msg("cur_history:%d cnt_history:%d", state
->cur_history
, state
->cnt_history
);
2338 /* Print out the command prompt, optionally ask where cursor is */
2339 parse_and_put_prompt(prompt
);
2342 /* Install window resize handler (NB: after *all* init is complete) */
2343 //FIXME: save entire sigaction!
2344 previous_SIGWINCH_handler
= signal(SIGWINCH
, win_changed
);
2345 win_changed(0); /* get initial window size */
2347 read_key_buffer
[0] = 0;
2350 * The emacs and vi modes share much of the code in the big
2351 * command loop. Commands entered when in vi's command mode
2352 * (aka "escape mode") get an extra bit added to distinguish
2353 * them - this keeps them from being self-inserted. This
2354 * clutters the big switch a bit, but keeps all the code
2360 ic
= ic_raw
= lineedit_read_key(read_key_buffer
, timeout
);
2362 #if ENABLE_FEATURE_REVERSE_SEARCH
2365 #if ENABLE_FEATURE_EDITING_VI
2368 /* btw, since KEYCODE_xxx are all < 0, this doesn't
2369 * change ic if it contains one of them: */
2370 ic
|= VI_CMDMODE_BIT
;
2377 vi_case('\n'|VI_CMDMODE_BIT
:)
2378 vi_case('\r'|VI_CMDMODE_BIT
:)
2384 vi_case('0'|VI_CMDMODE_BIT
:)
2385 /* Control-a -- Beginning of line */
2386 input_backward(cursor
);
2389 vi_case('h'|VI_CMDMODE_BIT
:)
2390 vi_case('\b'|VI_CMDMODE_BIT
:) /* ^H */
2391 vi_case('\x7f'|VI_CMDMODE_BIT
:) /* DEL */
2392 input_backward(1); /* Move back one character */
2395 vi_case('$'|VI_CMDMODE_BIT
:)
2396 /* Control-e -- End of line */
2397 put_till_end_and_adv_cursor();
2400 vi_case('l'|VI_CMDMODE_BIT
:)
2401 vi_case(' '|VI_CMDMODE_BIT
:)
2402 input_forward(); /* Move forward one character */
2405 case '\x7f': /* DEL */
2411 case KEYCODE_DELETE
:
2417 #if ENABLE_FEATURE_TAB_COMPLETION
2419 input_tab(&lastWasTab
);
2423 /* Control-k -- clear to end of line */
2424 command_ps
[cursor
] = BB_NUL
;
2425 command_len
= cursor
;
2426 printf(SEQ_CLEAR_TILL_END_OF_SCREEN
);
2429 vi_case(CTRL('L')|VI_CMDMODE_BIT
:)
2430 /* Control-l -- clear screen */
2431 printf(ESC
"[H"); /* cursor to top,left */
2432 redraw(0, command_len
- cursor
);
2436 vi_case(CTRL('N')|VI_CMDMODE_BIT
:)
2437 vi_case('j'|VI_CMDMODE_BIT
:)
2438 /* Control-n -- Get next command in history */
2439 if (get_next_history())
2443 vi_case(CTRL('P')|VI_CMDMODE_BIT
:)
2444 vi_case('k'|VI_CMDMODE_BIT
:)
2445 /* Control-p -- Get previous command from history */
2446 if (get_previous_history())
2451 vi_case(CTRL('U')|VI_CMDMODE_BIT
:)
2452 /* Control-U -- Clear line before cursor */
2454 command_len
-= cursor
;
2455 memmove(command_ps
, command_ps
+ cursor
,
2456 (command_len
+ 1) * sizeof(command_ps
[0]));
2457 redraw(cmdedit_y
, command_len
);
2461 vi_case(CTRL('W')|VI_CMDMODE_BIT
:)
2462 /* Control-W -- Remove the last word */
2463 while (cursor
> 0 && BB_isspace(command_ps
[cursor
-1]))
2465 while (cursor
> 0 && !BB_isspace(command_ps
[cursor
-1]))
2468 #if ENABLE_FEATURE_REVERSE_SEARCH
2470 ic
= ic_raw
= reverse_i_search();
2474 #if ENABLE_FEATURE_EDITING_VI
2475 case 'i'|VI_CMDMODE_BIT
:
2478 case 'I'|VI_CMDMODE_BIT
:
2479 input_backward(cursor
);
2482 case 'a'|VI_CMDMODE_BIT
:
2486 case 'A'|VI_CMDMODE_BIT
:
2487 put_till_end_and_adv_cursor();
2490 case 'x'|VI_CMDMODE_BIT
:
2493 case 'X'|VI_CMDMODE_BIT
:
2499 case 'W'|VI_CMDMODE_BIT
:
2502 case 'w'|VI_CMDMODE_BIT
:
2505 case 'E'|VI_CMDMODE_BIT
:
2508 case 'e'|VI_CMDMODE_BIT
:
2511 case 'B'|VI_CMDMODE_BIT
:
2514 case 'b'|VI_CMDMODE_BIT
:
2517 case 'C'|VI_CMDMODE_BIT
:
2520 case 'D'|VI_CMDMODE_BIT
:
2523 case 'c'|VI_CMDMODE_BIT
:
2526 case 'd'|VI_CMDMODE_BIT
: {
2529 ic
= lineedit_read_key(read_key_buffer
, timeout
);
2530 if (errno
) /* error */
2531 goto return_error_indicator
;
2532 if (ic
== ic_raw
) { /* "cc", "dd" */
2533 input_backward(cursor
);
2545 case 'w': /* "dw", "cw" */
2546 vi_word_motion(vi_cmdmode
);
2548 case 'W': /* 'dW', 'cW' */
2549 vi_Word_motion(vi_cmdmode
);
2551 case 'e': /* 'de', 'ce' */
2555 case 'E': /* 'dE', 'cE' */
2561 input_backward(cursor
- sc
);
2562 while (nc
-- > cursor
)
2565 case 'b': /* "db", "cb" */
2566 case 'B': /* implemented as B */
2571 while (sc
-- > cursor
)
2574 case ' ': /* "d ", "c " */
2577 case '$': /* "d$", "c$" */
2579 while (cursor
< command_len
)
2585 case 'p'|VI_CMDMODE_BIT
:
2588 case 'P'|VI_CMDMODE_BIT
:
2591 case 'r'|VI_CMDMODE_BIT
:
2592 //FIXME: unicode case?
2593 ic
= lineedit_read_key(read_key_buffer
, timeout
);
2594 if (errno
) /* error */
2595 goto return_error_indicator
;
2596 if (ic
< ' ' || ic
> 255) {
2599 command_ps
[cursor
] = ic
;
2604 case '\x1b': /* ESC */
2605 if (state
->flags
& VI_MODE
) {
2606 /* insert mode --> command mode */
2610 /* Handle a few ESC-<key> combinations the same way
2611 * standard readline bindings (IOW: bash) do.
2612 * Often, Alt-<key> generates ESC-<key>.
2614 ic
= lineedit_read_key(read_key_buffer
, 50);
2616 //case KEYCODE_LEFT: - bash doesn't do this
2620 //case KEYCODE_RIGHT: - bash doesn't do this
2624 //case KEYCODE_DELETE: - bash doesn't do this
2625 case 'd': /* Alt-D */
2627 /* Delete word forward */
2628 int nc
, sc
= cursor
;
2636 case '\b': /* Alt-Backspace(?) */
2637 case '\x7f': /* Alt-Backspace(?) */
2638 //case 'w': - bash doesn't do this
2640 /* Delete word backward */
2643 while (sc
-- > cursor
)
2649 #endif /* FEATURE_COMMAND_EDITING_VI */
2653 if (get_previous_history())
2658 if (!get_next_history())
2661 /* Rewrite the line with the selected history item */
2662 /* change command */
2663 command_len
= load_string(state
->history
[state
->cur_history
] ?
2664 state
->history
[state
->cur_history
] : "");
2665 /* redraw and go to eol (bol, in vi) */
2666 redraw(cmdedit_y
, (state
->flags
& VI_MODE
) ? 9999 : 0);
2675 case KEYCODE_CTRL_LEFT
:
2676 case KEYCODE_ALT_LEFT
: /* bash doesn't do it */
2679 case KEYCODE_CTRL_RIGHT
:
2680 case KEYCODE_ALT_RIGHT
: /* bash doesn't do it */
2684 input_backward(cursor
);
2687 put_till_end_and_adv_cursor();
2691 if (initial_settings
.c_cc
[VINTR
] != 0
2692 && ic_raw
== initial_settings
.c_cc
[VINTR
]
2694 /* Ctrl-C (usually) - stop gathering input */
2697 break_out
= -1; /* "do not append '\n'" */
2700 if (initial_settings
.c_cc
[VEOF
] != 0
2701 && ic_raw
== initial_settings
.c_cc
[VEOF
]
2703 /* Ctrl-D (usually) - delete one character,
2704 * or exit if len=0 and no chars to delete */
2705 if (command_len
== 0) {
2708 case -1: /* error (e.g. EIO when tty is destroyed) */
2709 IF_FEATURE_EDITING_VI(return_error_indicator
:)
2710 break_out
= command_len
= -1;
2716 // /* Control-V -- force insert of next char */
2717 // if (c == CTRL('V')) {
2718 // if (safe_read(STDIN_FILENO, &c, 1) < 1)
2719 // goto return_error_indicator;
2726 || (!ENABLE_UNICODE_SUPPORT
&& ic
>= 256)
2727 || (ENABLE_UNICODE_SUPPORT
&& ic
>= VI_CMDMODE_BIT
)
2729 /* If VI_CMDMODE_BIT is set, ic is >= 256
2730 * and vi mode ignores unexpected chars.
2731 * Otherwise, we are here if ic is a
2732 * control char or an unhandled ESC sequence,
2733 * which is also ignored.
2737 if ((int)command_len
>= (maxsize
- 2)) {
2738 /* Not enough space for the char and EOL */
2743 if (cursor
== (command_len
- 1)) {
2744 /* We are at the end, append */
2745 command_ps
[cursor
] = ic
;
2746 command_ps
[cursor
+ 1] = BB_NUL
;
2747 put_cur_glyph_and_inc_cursor();
2748 if (unicode_bidi_isrtl(ic
))
2751 /* In the middle, insert */
2754 memmove(command_ps
+ sc
+ 1, command_ps
+ sc
,
2755 (command_len
- sc
) * sizeof(command_ps
[0]));
2756 command_ps
[sc
] = ic
;
2757 /* is right-to-left char, or neutral one (e.g. comma) was just added to rtl text? */
2760 put_till_end_and_adv_cursor();
2761 /* to prev x pos + 1 */
2762 input_backward(cursor
- sc
);
2770 #if ENABLE_FEATURE_TAB_COMPLETION
2776 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
2777 if (S
.sent_ESC_br6n
) {
2778 /* "sleep 1; busybox ash" + hold [Enter] to trigger.
2779 * We sent "ESC [ 6 n", but got '\n' first, and
2780 * KEYCODE_CURSOR_POS response is now buffered from terminal.
2781 * It's bad already and not much can be done with it
2782 * (it _will_ be visible for the next process to read stdin),
2783 * but without this delay it even shows up on the screen
2784 * as garbage because we restore echo settings with tcsetattr
2785 * before it comes in. UGLY!
2791 /* End of bug-catching "command_must_not_be_used" trick */
2794 #if ENABLE_UNICODE_SUPPORT
2796 if (command_len
> 0)
2797 command_len
= save_string(command
, maxsize
- 1);
2801 if (command_len
> 0) {
2802 remember_in_history(command
);
2805 if (break_out
> 0) {
2806 command
[command_len
++] = '\n';
2807 command
[command_len
] = '\0';
2810 #if ENABLE_FEATURE_TAB_COMPLETION
2811 free_tab_completion_data();
2814 /* restore initial_settings */
2815 tcsetattr_stdin_TCSANOW(&initial_settings
);
2816 /* restore SIGWINCH handler */
2817 signal(SIGWINCH
, previous_SIGWINCH_handler
);
2823 return len
; /* can't return command_len, DEINIT_S() destroys it */
2826 #else /* !FEATURE_EDITING */
2828 #undef read_line_input
2829 int FAST_FUNC
read_line_input(const char* prompt
, char* command
, int maxsize
)
2831 fputs(prompt
, stdout
);
2833 if (!fgets(command
, maxsize
, stdin
))
2835 return strlen(command
);
2838 #endif /* !FEATURE_EDITING */
2849 const char *applet_name
= "debug stuff usage";
2851 int main(int argc
, char **argv
)
2853 char buff
[MAX_LINELEN
];
2855 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
2856 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
2857 "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
2858 "\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
2865 l
= read_line_input(prompt
, buff
);
2866 if (l
<= 0 || buff
[l
-1] != '\n')
2869 printf("*** read_line_input() returned line =%s=\n", buff
);
2871 printf("*** read_line_input() detect ^D\n");