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.
17 * Usage and known bugs:
18 * Terminal key codes are not extensive, more needs to be added.
19 * This version was created on Debian GNU/Linux 2.x.
20 * Delete, Backspace, Home, End, and the arrow keys were tested
21 * to work in an Xterm and console. Ctrl-A also works as Home.
22 * Ctrl-E also works as End.
24 * The following readline-like commands are not implemented:
25 * CTL-t -- Transpose two characters
27 * lineedit does not know that the terminal escape sequences do not
28 * take up space on the screen. The redisplay code assumes, unless
29 * told otherwise, that each character in the prompt is a printable
30 * character that takes up one character position on the screen.
31 * You need to tell lineedit that some sequences of characters
32 * in the prompt take up no screen space. Compatibly with readline,
33 * use the \[ escape to begin a sequence of non-printing characters,
34 * and the \] escape to signal the end of such a sequence. Example:
36 * PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
38 * Unicode in PS1 is not fully supported: prompt length calulation is wrong,
39 * resulting in line wrap problems with long (multi-line) input.
41 * Multi-line PS1 (e.g. PS1="\n[\w]\n$ ") has problems with history
42 * browsing: up/down arrows result in scrolling.
43 * It stems from simplistic "cmdedit_y = cmdedit_prmt_len / cmdedit_termw"
44 * calculation of how many lines the prompt takes.
47 #include "NUM_APPLETS.h"
49 #ifndef _POSIX_VDISABLE
50 # define _POSIX_VDISABLE '\0'
55 # define ENABLE_FEATURE_EDITING 0
56 # define ENABLE_FEATURE_TAB_COMPLETION 0
57 # define ENABLE_FEATURE_USERNAME_COMPLETION 0
61 /* Entire file (except TESTing part) sits inside this #if */
62 #if ENABLE_FEATURE_EDITING
65 #define ENABLE_USERNAME_OR_HOMEDIR \
66 (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
67 #define IF_USERNAME_OR_HOMEDIR(...)
68 #if ENABLE_USERNAME_OR_HOMEDIR
69 # undef IF_USERNAME_OR_HOMEDIR
70 # define IF_USERNAME_OR_HOMEDIR(...) __VA_ARGS__
75 #if ENABLE_UNICODE_SUPPORT
76 # define BB_NUL ((wchar_t)0)
77 # define CHAR_T wchar_t
78 static bool BB_isspace(CHAR_T c) { return ((unsigned)c < 256 && isspace(c)); }
79 # if ENABLE_FEATURE_EDITING_VI
80 static bool BB_isalnum_or_underscore(CHAR_T c) {
81 return ((unsigned)c < 256 && isalnum(c)) || c == '_';
84 static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); }
89 # define isspace isspace_must_not_be_used
90 # define isalnum isalnum_must_not_be_used
91 # define ispunct ispunct_must_not_be_used
92 # define isprint isprint_must_not_be_used
96 # define BB_isspace(c) isspace(c)
97 # if ENABLE_FEATURE_EDITING_VI
98 static bool BB_isalnum_or_underscore(CHAR_T c) {
99 return ((unsigned)c < 256 && isalnum(c)) || c == '_';
102 # define BB_ispunct(c) ispunct(c)
104 #if ENABLE_UNICODE_PRESERVE_BROKEN
105 # define unicode_mark_raw_byte(wc) ((wc) | 0x20000000)
106 # define unicode_is_raw_byte(wc) ((wc) & 0x20000000)
108 # define unicode_is_raw_byte(wc) 0
114 #define SEQ_CLEAR_TILL_END_OF_SCREEN ESC"[J"
115 //#define SEQ_CLEAR_TILL_END_OF_LINE ESC"[K"
119 MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0
120 ? CONFIG_FEATURE_EDITING_MAX_LEN
124 #if ENABLE_USERNAME_OR_HOMEDIR
125 static const char null_str[] ALIGN1 = "";
128 /* We try to minimize both static and stack usage. */
129 struct lineedit_statics {
132 unsigned cmdedit_termw; /* = 80; */ /* actual terminal width */
134 unsigned cmdedit_x; /* real x (col) terminal position */
135 unsigned cmdedit_y; /* pseudoreal y (row) terminal position */
136 unsigned cmdedit_prmt_len; /* length of prompt (without colors etc) */
139 int command_len; /* must be signed */
140 /* signed maxsize: we want x in "if (x > S.maxsize)"
141 * to _not_ be promoted to unsigned */
145 const char *cmdedit_prompt;
147 #if ENABLE_USERNAME_OR_HOMEDIR
149 char *home_pwd_buf; /* = (char*)null_str; */
152 #if ENABLE_FEATURE_TAB_COMPLETION
154 unsigned num_matches;
157 unsigned SIGWINCH_saved;
158 volatile unsigned SIGWINCH_count;
159 volatile smallint ok_to_redraw;
161 #if ENABLE_FEATURE_EDITING_VI
162 # define DELBUFSIZ 128
163 smallint newdelflag; /* whether delbuf should be reused yet */
165 CHAR_T delbuf[DELBUFSIZ]; /* a place to store deleted characters */
167 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
168 smallint sent_ESC_br6n;
171 /* Largish struct, keeping it last results in smaller code */
172 struct sigaction SIGWINCH_handler;
175 /* See lineedit_ptr_hack.c */
176 extern struct lineedit_statics *const lineedit_ptr_to_statics;
178 #define S (*lineedit_ptr_to_statics)
179 #define state (S.state )
180 #define cmdedit_termw (S.cmdedit_termw )
181 #define cmdedit_x (S.cmdedit_x )
182 #define cmdedit_y (S.cmdedit_y )
183 #define cmdedit_prmt_len (S.cmdedit_prmt_len)
184 #define cursor (S.cursor )
185 #define command_len (S.command_len )
186 #define command_ps (S.command_ps )
187 #define cmdedit_prompt (S.cmdedit_prompt )
188 #define user_buf (S.user_buf )
189 #define home_pwd_buf (S.home_pwd_buf )
190 #define matches (S.matches )
191 #define num_matches (S.num_matches )
192 #define delptr (S.delptr )
193 #define newdelflag (S.newdelflag )
194 #define delbuf (S.delbuf )
196 #define INIT_S() do { \
197 (*(struct lineedit_statics**)&lineedit_ptr_to_statics) = xzalloc(sizeof(S)); \
199 cmdedit_termw = 80; \
200 IF_USERNAME_OR_HOMEDIR(home_pwd_buf = (char*)null_str;) \
201 IF_FEATURE_EDITING_VI(delptr = delbuf;) \
204 static void deinit_S(void)
206 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
207 /* This one is allocated only if FANCY_PROMPT is on
208 * (otherwise it points to verbatim prompt (NOT malloced)) */
209 free((char*)cmdedit_prompt);
211 #if ENABLE_USERNAME_OR_HOMEDIR
213 if (home_pwd_buf != null_str)
216 free(lineedit_ptr_to_statics);
218 #define DEINIT_S() deinit_S()
221 #if ENABLE_UNICODE_SUPPORT
222 static size_t load_string(const char *src)
224 if (unicode_status == UNICODE_ON) {
225 ssize_t len = mbstowcs(command_ps, src, S.maxsize - 1);
228 command_ps[len] = BB_NUL;
232 while (src[i] && i < S.maxsize - 1) {
233 command_ps[i] = src[i];
236 command_ps[i] = BB_NUL;
240 static unsigned save_string(char *dst, unsigned maxsize)
242 if (unicode_status == UNICODE_ON) {
243 # if !ENABLE_UNICODE_PRESERVE_BROKEN
244 ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
254 while (dstpos < maxsize) {
258 /* Convert up to 1st invalid byte (or up to end) */
259 while ((wc = command_ps[srcpos]) != BB_NUL
260 && !unicode_is_raw_byte(wc)
264 command_ps[srcpos] = BB_NUL;
265 n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos);
266 if (n < 0) /* should not happen */
269 if (wc == BB_NUL) /* usually is */
272 /* We do have invalid byte here! */
273 command_ps[srcpos] = wc; /* restore it */
275 if (dstpos == maxsize)
277 dst[dstpos++] = (char) wc;
284 while ((dst[i] = command_ps[i]) != 0)
289 /* I thought just fputwc(c, stdout) would work. But no... */
290 static void BB_PUTCHAR(wchar_t c)
292 if (unicode_status == UNICODE_ON) {
293 char buf[MB_CUR_MAX + 1];
294 mbstate_t mbst = { 0 };
295 ssize_t len = wcrtomb(buf, c, &mbst);
301 /* In this case, c is always one byte */
305 # if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
306 static wchar_t adjust_width_and_validate_wc(unsigned *width_adj, wchar_t wc)
308 static wchar_t adjust_width_and_validate_wc(wchar_t wc)
309 # define adjust_width_and_validate_wc(width_adj, wc) \
310 ((*(width_adj))++, adjust_width_and_validate_wc(wc))
315 if (unicode_status == UNICODE_ON) {
316 if (wc > CONFIG_LAST_SUPPORTED_WCHAR) {
317 /* note: also true for unicode_is_raw_byte(wc) */
321 if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0)
322 || (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0)
323 || (!ENABLE_UNICODE_WIDE_WCHARS && w > 1)
327 wc = CONFIG_SUBST_WCHAR;
331 # if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
337 static size_t load_string(const char *src)
339 safe_strncpy(command_ps, src, S.maxsize);
340 return strlen(command_ps);
342 # if ENABLE_FEATURE_TAB_COMPLETION
343 static void save_string(char *dst, unsigned maxsize)
345 safe_strncpy(dst, command_ps, maxsize);
348 # define BB_PUTCHAR(c) bb_putchar(c)
349 /* Should never be called: */
350 int adjust_width_and_validate_wc(unsigned *width_adj, int wc);
354 /* Put 'command_ps[cursor]', cursor++.
355 * Advance cursor on screen. If we reached right margin, scroll text up
356 * and remove terminal margin effect by printing 'next_char' */
357 #define HACK_FOR_WRONG_WIDTH 1
358 static void put_cur_glyph_and_inc_cursor(void)
360 CHAR_T c = command_ps[cursor];
365 /* erase character after end of input string */
368 /* advance cursor only if we aren't at the end yet */
370 if (unicode_status == UNICODE_ON) {
371 IF_UNICODE_WIDE_WCHARS(width = cmdedit_x;)
372 c = adjust_width_and_validate_wc(&cmdedit_x, c);
373 IF_UNICODE_WIDE_WCHARS(width = cmdedit_x - width;)
379 ofs_to_right = cmdedit_x - cmdedit_termw;
380 if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right <= 0) {
381 /* c fits on this line */
385 if (ofs_to_right >= 0) {
386 /* we go to the next line */
387 #if HACK_FOR_WRONG_WIDTH
388 /* This works better if our idea of term width is wrong
389 * and it is actually wider (often happens on serial lines).
390 * Printing CR,LF *forces* cursor to next line.
391 * OTOH if terminal width is correct AND terminal does NOT
392 * have automargin (IOW: it is moving cursor to next line
393 * by itself (which is wrong for VT-10x terminals)),
394 * this will break things: there will be one extra empty line */
395 puts("\r"); /* + implicit '\n' */
397 /* VT-10x terminals don't wrap cursor to next line when last char
398 * on the line is printed - cursor stays "over" this char.
399 * Need to print _next_ char too (first one to appear on next line)
400 * to make cursor move down to next line.
402 /* Works ok only if cmdedit_termw is correct. */
403 c = command_ps[cursor];
410 if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right == 0) {
412 } else { /* ofs_to_right > 0 */
413 /* wide char c didn't fit on prev line */
420 /* Move to end of line (by printing all chars till the end) */
421 static void put_till_end_and_adv_cursor(void)
423 while (cursor < command_len)
424 put_cur_glyph_and_inc_cursor();
427 /* Go to the next line */
428 static void goto_new_line(void)
430 put_till_end_and_adv_cursor();
435 static void beep(void)
440 static void put_prompt(void)
442 fputs(cmdedit_prompt, stdout);
444 cmdedit_y = cmdedit_prmt_len / cmdedit_termw; /* new quasireal y */
445 cmdedit_x = cmdedit_prmt_len % cmdedit_termw;
448 /* Move back one character */
449 /* (optimized for slow terminals) */
450 static void input_backward(unsigned num)
458 if ((ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS)
459 && unicode_status == UNICODE_ON
461 /* correct NUM to be equal to _screen_ width */
465 adjust_width_and_validate_wc(&num, command_ps[cursor + n]);
470 if (cmdedit_x >= num) {
473 /* This is longer by 5 bytes on x86.
474 * Also gets miscompiled for ARM users
475 * (busybox.net/bugs/view.php?id=2274).
476 * printf(("\b\b\b\b" + 4) - num);
484 printf(ESC"[%uD", num);
488 /* Need to go one or more lines up */
489 if (ENABLE_UNICODE_WIDE_WCHARS) {
490 /* With wide chars, it is hard to "backtrack"
491 * and reliably figure out where to put cursor.
492 * Example (<> is a wide char; # is an ordinary char, _ cursor):
496 * and user presses left arrow. num = 1, cmdedit_x = 0,
497 * We need to go up one line, and then - how do we know that
498 * we need to go *10* positions to the right? Because
502 * in this situation we need to go *11* positions to the right.
504 * A simpler thing to do is to redraw everything from the start
505 * up to new cursor position (which is already known):
508 /* go to 1st column; go up to first line */
509 printf("\r" ESC"[%uA", cmdedit_y);
512 put_prompt(); /* sets cursor to 0 */
513 while (cursor < sv_cursor)
514 put_cur_glyph_and_inc_cursor();
517 /* num = chars to go back from the beginning of current line: */
519 /* num=1...w: one line up, w+1...2w: two, etc: */
520 lines_up = 1 + (num - 1) / cmdedit_termw;
521 cmdedit_x = (cmdedit_termw * cmdedit_y - num) % cmdedit_termw;
522 cmdedit_y -= lines_up;
523 /* go to 1st column; go up */
524 printf("\r" ESC"[%uA", lines_up);
525 /* go to correct column.
526 * xterm, konsole, Linux VT interpret 0 as 1 below! wow.
527 * need to *make sure* we skip it if cmdedit_x == 0 */
529 printf(ESC"[%uC", cmdedit_x);
533 /* draw prompt, editor line, and clear tail */
534 static void redraw(int y, int back_cursor)
536 if (y > 0) /* up y lines */
537 printf(ESC"[%uA", y);
540 put_till_end_and_adv_cursor();
541 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
542 input_backward(back_cursor);
545 /* Delete the char in front of the cursor, optionally saving it
546 * for later putback */
547 #if !ENABLE_FEATURE_EDITING_VI
548 static void input_delete(void)
549 #define input_delete(save) input_delete()
551 static void input_delete(int save)
556 if (j == (int)command_len)
559 #if ENABLE_FEATURE_EDITING_VI
565 if ((delptr - delbuf) < DELBUFSIZ)
566 *delptr++ = command_ps[j];
570 memmove(command_ps + j, command_ps + j + 1,
571 /* (command_len + 1 [because of NUL]) - (j + 1)
572 * simplified into (command_len - j) */
573 (command_len - j) * sizeof(command_ps[0]));
575 put_till_end_and_adv_cursor();
576 /* Last char is still visible, erase it (and more) */
577 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
578 input_backward(cursor - j); /* back to old pos cursor */
581 #if ENABLE_FEATURE_EDITING_VI
582 static void put(void)
585 int j = delptr - delbuf;
590 /* open hole and then fill it */
591 memmove(command_ps + cursor + j, command_ps + cursor,
592 (command_len - cursor + 1) * sizeof(command_ps[0]));
593 memcpy(command_ps + cursor, delbuf, j * sizeof(command_ps[0]));
595 put_till_end_and_adv_cursor();
596 input_backward(cursor - ocursor - j + 1); /* at end of new text */
600 /* Delete the char in back of the cursor */
601 static void input_backspace(void)
609 /* Move forward one character */
610 static void input_forward(void)
612 if (cursor < command_len)
613 put_cur_glyph_and_inc_cursor();
616 #if ENABLE_FEATURE_TAB_COMPLETION
619 //needs to be more clever: currently it thinks that "foo\ b<TAB>
620 //matches the file named "foo bar", which is untrue.
621 //Also, perhaps "foo b<TAB> needs to complete to "foo bar" <cursor>,
622 //not "foo bar <cursor>...
624 static void free_tab_completion_data(void)
628 free(matches[--num_matches]);
634 static void add_match(char *matched)
636 matches = xrealloc_vector(matches, 4, num_matches);
637 matches[num_matches] = matched;
641 # if ENABLE_FEATURE_USERNAME_COMPLETION
642 /* Replace "~user/..." with "/homedir/...".
643 * The parameter is malloced, free it or return it
644 * unchanged if no user is matched.
646 static char *username_path_completion(char *ud)
648 struct passwd *entry;
649 char *tilde_name = ud;
653 if (*ud == '/') { /* "~/..." */
657 ud = strchr(ud, '/');
658 *ud = '\0'; /* "~user" */
659 entry = getpwnam(tilde_name + 1);
660 *ud = '/'; /* restore "~user/..." */
662 home = entry->pw_dir;
665 ud = concat_path_file(home, ud);
672 /* ~use<tab> - find all users with this prefix.
673 * Return the length of the prefix used for matching.
675 static NOINLINE unsigned complete_username(const char *ud)
681 userlen = strlen(ud);
684 while ((pw = getpwent()) != NULL) {
685 /* Null usernames should result in all users as possible completions. */
686 if (/* !ud[0] || */ is_prefixed_with(pw->pw_name, ud)) {
687 add_match(xasprintf("~%s/", pw->pw_name));
690 endpwent(); /* don't keep password file open */
694 # endif /* FEATURE_USERNAME_COMPLETION */
702 static int path_parse(char ***p)
709 if (state->flags & WITH_PATH_LOOKUP)
710 pth = state->path_lookup;
712 pth = getenv("PATH");
714 /* PATH="" or PATH=":"? */
715 if (!pth || !pth[0] || LONE_CHAR(pth, ':'))
719 npth = 1; /* path component count */
721 tmp = strchr(tmp, ':');
726 break; /* :<empty> */
730 *p = res = xmalloc(npth * sizeof(res[0]));
731 res[0] = tmp = xstrdup(pth);
734 tmp = strchr(tmp, ':');
737 *tmp++ = '\0'; /* ':' -> '\0' */
739 break; /* :<empty> */
745 /* Complete command, directory or file name.
746 * Return the length of the prefix used for matching.
748 static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
751 char **paths = path1;
759 path1[0] = (char*)".";
761 pfind = strrchr(command, '/');
763 if (type == FIND_EXE_ONLY)
764 npaths = path_parse(&paths);
767 /* point to 'l' in "..../last_component" */
769 /* dirbuf = ".../.../.../" */
770 dirbuf = xstrndup(command, pfind - command);
771 # if ENABLE_FEATURE_USERNAME_COMPLETION
772 if (dirbuf[0] == '~') /* ~/... or ~user/... */
773 dirbuf = username_path_completion(dirbuf);
777 pf_len = strlen(pfind);
779 #if ENABLE_FEATURE_SH_STANDALONE && NUM_APPLETS != 1
780 if (type == FIND_EXE_ONLY && !dirbuf) {
781 const char *p = applet_names;
784 if (strncmp(pfind, p, pf_len) == 0)
785 add_match(xstrdup(p));
792 for (i = 0; i < npaths; i++) {
798 dir = opendir(paths[i]);
800 continue; /* don't print an error */
802 while ((next = readdir(dir)) != NULL) {
804 const char *name_found = next->d_name;
806 /* .../<tab>: bash 3.2.0 shows dotfiles, but not . and .. */
807 if (!pfind[0] && DOT_OR_DOTDOT(name_found))
810 if (!is_prefixed_with(name_found, pfind))
813 found = concat_path_file(paths[i], name_found);
814 /* NB: stat() first so that we see is it a directory;
815 * but if that fails, use lstat() so that
816 * we still match dangling links */
817 if (stat(found, &st) && lstat(found, &st))
818 goto cont; /* hmm, remove in progress? */
821 len = strlen(name_found);
822 found = xrealloc(found, len + 2); /* +2: for slash and NUL */
823 strcpy(found, name_found);
825 if (S_ISDIR(st.st_mode)) {
826 /* name is a directory, add slash */
828 found[len + 1] = '\0';
830 /* skip files if looking for dirs only (example: cd) */
831 if (type == FIND_DIR_ONLY)
834 /* add it to the list */
841 } /* for every path */
843 if (paths != path1) {
844 free(paths[0]); /* allocated memory is only in first member */
852 /* build_match_prefix:
853 * On entry, match_buf contains everything up to cursor at the moment <tab>
854 * was pressed. This function looks at it, figures out what part of it
855 * constitutes the command/file/directory prefix to use for completion,
856 * and rewrites match_buf to contain only that part.
860 /* QUOT is used on elements of int_buf[], which are bytes,
861 * not Unicode chars. Therefore it works correctly even in Unicode mode.
863 #define QUOT (UCHAR_MAX+1)
864 static void remove_chunk(int16_t *int_buf, int beg, int end)
866 /* beg must be <= end */
870 while ((int_buf[beg] = int_buf[end]) != 0)
875 for (i = 0; int_buf[i]; i++)
876 bb_putchar((unsigned char)int_buf[i]);
880 /* Caller ensures that match_buf points to a malloced buffer
881 * big enough to hold strlen(match_buf)*2 + 2
883 static NOINLINE int build_match_prefix(char *match_buf)
887 int16_t *int_buf = (int16_t*)match_buf;
889 if (dbg_bmp) printf("\n%s\n", match_buf);
891 /* Copy in reverse order, since they overlap */
892 i = strlen(match_buf);
894 int_buf[i] = (unsigned char)match_buf[i];
898 /* Mark every \c as "quoted c" */
899 for (i = 0; int_buf[i]; i++) {
900 if (int_buf[i] == '\\') {
901 remove_chunk(int_buf, i, i + 1);
905 /* Quote-mark "chars" and 'chars', drop delimiters */
910 int cur = int_buf[i];
913 if (cur == '\'' || cur == '"') {
914 if (!in_quote || (cur == in_quote)) {
916 remove_chunk(int_buf, i, i + 1);
921 int_buf[i] = cur | QUOT;
926 /* Remove everything up to command delimiters:
927 * ';' ';;' '&' '|' '&&' '||',
928 * but careful with '>&' '<&' '>|'
930 for (i = 0; int_buf[i]; i++) {
931 int cur = int_buf[i];
932 if (cur == ';' || cur == '&' || cur == '|') {
933 int prev = i ? int_buf[i - 1] : 0;
934 if (cur == '&' && (prev == '>' || prev == '<')) {
936 } else if (cur == '|' && prev == '>') {
939 remove_chunk(int_buf, 0, i + 1 + (cur == int_buf[i + 1]));
940 i = -1; /* back to square 1 */
943 /* Remove all `cmd` */
944 for (i = 0; int_buf[i]; i++) {
945 if (int_buf[i] == '`') {
946 for (j = i + 1; int_buf[j]; j++) {
947 if (int_buf[j] == '`') {
948 /* `cmd` should count as a word:
949 * `cmd` c<tab> should search for files c*,
950 * not commands c*. Therefore we don't drop
951 * `cmd` entirely, we replace it with single `.
953 remove_chunk(int_buf, i, j);
957 /* No closing ` - command mode, remove all up to ` */
958 remove_chunk(int_buf, 0, i + 1);
964 /* Remove "cmd (" and "cmd {"
965 * Example: "if { c<tab>"
966 * In this example, c should be matched as command pfx.
968 for (i = 0; int_buf[i]; i++) {
969 if (int_buf[i] == '(' || int_buf[i] == '{') {
970 remove_chunk(int_buf, 0, i + 1);
971 i = -1; /* back to square 1 */
975 /* Remove leading unquoted spaces */
976 for (i = 0; int_buf[i]; i++)
977 if (int_buf[i] != ' ')
979 remove_chunk(int_buf, 0, i);
981 /* Determine completion mode */
982 command_mode = FIND_EXE_ONLY;
983 for (i = 0; int_buf[i]; i++) {
984 if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
985 if (int_buf[i] == ' '
986 && command_mode == FIND_EXE_ONLY
987 && (char)int_buf[0] == 'c'
988 && (char)int_buf[1] == 'd'
989 && i == 2 /* -> int_buf[2] == ' ' */
991 command_mode = FIND_DIR_ONLY;
993 command_mode = FIND_FILE_ONLY;
998 if (dbg_bmp) printf("command_mode(0:exe/1:dir/2:file):%d\n", command_mode);
1000 /* Remove everything except last word */
1001 for (i = 0; int_buf[i]; i++) /* quasi-strlen(int_buf) */
1003 for (--i; i >= 0; i--) {
1004 int cur = int_buf[i];
1005 if (cur == ' ' || cur == '<' || cur == '>' || cur == '|' || cur == '&') {
1006 remove_chunk(int_buf, 0, i + 1);
1011 /* Convert back to string of _chars_ */
1013 while ((match_buf[i] = int_buf[i]) != '\0')
1016 if (dbg_bmp) printf("final match_buf:'%s'\n", match_buf);
1018 return command_mode;
1022 * Display by column (original idea from ls applet,
1023 * very optimized by me [Vladimir] :)
1025 static void showfiles(void)
1028 int column_width = 0;
1029 int nfiles = num_matches;
1033 /* find the longest file name - use that as the column width */
1034 for (row = 0; row < nrows; row++) {
1035 l = unicode_strwidth(matches[row]);
1036 if (column_width < l)
1039 column_width += 2; /* min space for columns */
1040 ncols = cmdedit_termw / column_width;
1045 nrows++; /* round up fractionals */
1049 for (row = 0; row < nrows; row++) {
1053 for (nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++) {
1054 printf("%s%-*s", matches[n],
1055 (int)(column_width - unicode_strwidth(matches[n])), ""
1058 if (ENABLE_UNICODE_SUPPORT)
1059 puts(printable_string(NULL, matches[n]));
1065 static const char *is_special_char(char c)
1067 return strchr(" `\"#$%^&*()=+{}[]:;'|\\<>", c);
1070 static char *quote_special_chars(char *found)
1073 char *s = xzalloc((strlen(found) + 1) * 2);
1076 if (is_special_char(*found))
1080 /* s[l] = '\0'; - already is */
1084 /* Do TAB completion */
1085 static NOINLINE void input_tab(smallint *lastWasTab)
1090 /* Length of string used for matching */
1091 unsigned match_pfx_len = match_pfx_len;
1093 # if ENABLE_UNICODE_SUPPORT
1094 /* cursor pos in command converted to multibyte form */
1097 if (!(state->flags & TAB_COMPLETION))
1101 /* The last char was a TAB too.
1102 * Print a list of all the available choices.
1104 if (num_matches > 0) {
1105 /* cursor will be changed by goto_new_line() */
1106 int sav_cursor = cursor;
1109 redraw(0, command_len - sav_cursor);
1115 chosen_match = NULL;
1117 /* Make a local copy of the string up to the position of the cursor.
1118 * build_match_prefix will expand it into int16_t's, need to allocate
1119 * twice as much as the string_len+1.
1120 * (we then also (ab)use this extra space later - see (**))
1122 match_buf = xmalloc(MAX_LINELEN * sizeof(int16_t));
1123 # if !ENABLE_UNICODE_SUPPORT
1124 save_string(match_buf, cursor + 1); /* +1 for NUL */
1127 CHAR_T wc = command_ps[cursor];
1128 command_ps[cursor] = BB_NUL;
1129 save_string(match_buf, MAX_LINELEN);
1130 command_ps[cursor] = wc;
1131 cursor_mb = strlen(match_buf);
1134 find_type = build_match_prefix(match_buf);
1136 /* Free up any memory already allocated */
1137 free_tab_completion_data();
1139 # if ENABLE_FEATURE_USERNAME_COMPLETION
1140 /* If the word starts with ~ and there is no slash in the word,
1141 * then try completing this word as a username. */
1142 if (state->flags & USERNAME_COMPLETION)
1143 if (match_buf[0] == '~' && strchr(match_buf, '/') == NULL)
1144 match_pfx_len = complete_username(match_buf);
1146 /* If complete_username() did not match,
1147 * try to match a command in $PATH, or a directory, or a file */
1149 match_pfx_len = complete_cmd_dir_file(match_buf, find_type);
1151 /* Account for backslashes which will be inserted
1152 * by quote_special_chars() later */
1154 const char *e = match_buf + strlen(match_buf);
1155 const char *s = e - match_pfx_len;
1157 if (is_special_char(*s++))
1161 /* Remove duplicates */
1164 qsort_string_vector(matches, num_matches);
1165 for (i = 0; i < num_matches - 1; ++i) {
1166 //if (matches[i] && matches[i+1]) { /* paranoia */
1167 if (strcmp(matches[i], matches[i+1]) == 0) {
1169 //matches[i] = NULL; /* paranoia */
1171 matches[n++] = matches[i];
1175 matches[n++] = matches[i];
1179 /* Did we find exactly one match? */
1180 if (num_matches != 1) { /* no */
1184 goto ret; /* no matches at all */
1185 /* Find common prefix */
1186 chosen_match = xstrdup(matches[0]);
1187 for (cp = chosen_match; *cp; cp++) {
1189 for (n = 1; n < num_matches; n++) {
1190 if (matches[n][cp - chosen_match] != *cp) {
1196 if (cp == chosen_match) { /* have unique prefix? */
1200 cp = quote_special_chars(chosen_match);
1203 len_found = strlen(chosen_match);
1204 } else { /* exactly one match */
1205 /* Next <tab> is not a double-tab */
1208 chosen_match = quote_special_chars(matches[0]);
1209 len_found = strlen(chosen_match);
1210 if (chosen_match[len_found-1] != '/') {
1211 chosen_match[len_found] = ' ';
1212 chosen_match[++len_found] = '\0';
1216 # if !ENABLE_UNICODE_SUPPORT
1217 /* Have space to place the match? */
1218 /* The result consists of three parts with these lengths: */
1219 /* cursor + (len_found - match_pfx_len) + (command_len - cursor) */
1220 /* it simplifies into: */
1221 if ((int)(len_found - match_pfx_len + command_len) < S.maxsize) {
1224 strcpy(match_buf, &command_ps[cursor]);
1225 /* add match and tail */
1226 sprintf(&command_ps[cursor], "%s%s", chosen_match + match_pfx_len, match_buf);
1227 command_len = strlen(command_ps);
1229 pos = cursor + len_found - match_pfx_len;
1230 /* write out the matched command */
1231 redraw(cmdedit_y, command_len - pos);
1235 /* Use 2nd half of match_buf as scratch space - see (**) */
1236 char *command = match_buf + MAX_LINELEN;
1237 int len = save_string(command, MAX_LINELEN);
1238 /* Have space to place the match? */
1239 /* cursor_mb + (len_found - match_pfx_len) + (len - cursor_mb) */
1240 if ((int)(len_found - match_pfx_len + len) < MAX_LINELEN) {
1243 strcpy(match_buf, &command[cursor_mb]);
1244 /* where do we want to have cursor after all? */
1245 strcpy(&command[cursor_mb], chosen_match + match_pfx_len);
1246 len = load_string(command);
1247 /* add match and tail */
1248 sprintf(&command[cursor_mb], "%s%s", chosen_match + match_pfx_len, match_buf);
1249 command_len = load_string(command);
1250 /* write out the matched command */
1251 /* paranoia: load_string can return 0 on conv error,
1252 * prevent passing pos = (0 - 12) to redraw */
1253 pos = command_len - len;
1254 redraw(cmdedit_y, pos >= 0 ? pos : 0);
1263 #endif /* FEATURE_TAB_COMPLETION */
1266 line_input_t* FAST_FUNC new_line_input_t(int flags)
1268 line_input_t *n = xzalloc(sizeof(*n));
1271 n->max_history = MAX_HISTORY;
1279 unsigned FAST_FUNC size_from_HISTFILESIZE(const char *hp)
1281 int size = MAX_HISTORY;
1286 if (size > MAX_HISTORY)
1292 static void save_command_ps_at_cur_history(void)
1294 if (command_ps[0] != BB_NUL) {
1295 int cur = state->cur_history;
1296 free(state->history[cur]);
1298 # if ENABLE_UNICODE_SUPPORT
1300 char tbuf[MAX_LINELEN];
1301 save_string(tbuf, sizeof(tbuf));
1302 state->history[cur] = xstrdup(tbuf);
1305 state->history[cur] = xstrdup(command_ps);
1310 /* state->flags is already checked to be nonzero */
1311 static int get_previous_history(void)
1313 if ((state->flags & DO_HISTORY) && state->cur_history) {
1314 save_command_ps_at_cur_history();
1315 state->cur_history--;
1322 static int get_next_history(void)
1324 if (state->flags & DO_HISTORY) {
1325 if (state->cur_history < state->cnt_history) {
1326 save_command_ps_at_cur_history(); /* save the current history line */
1327 return ++state->cur_history;
1334 /* Lists command history. Used by shell 'history' builtins */
1335 void FAST_FUNC show_history(const line_input_t *st)
1341 for (i = 0; i < st->cnt_history; i++)
1342 printf("%4d %s\n", i, st->history[i]);
1345 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
1346 /* We try to ensure that concurrent additions to the history
1347 * do not overwrite each other.
1348 * Otherwise shell users get unhappy.
1350 * History file is trimmed lazily, when it grows several times longer
1351 * than configured MAX_HISTORY lines.
1354 static void free_line_input_t(line_input_t *n)
1356 int i = n->cnt_history;
1358 free(n->history[--i]);
1362 /* state->flags is already checked to be nonzero */
1363 static void load_history(line_input_t *st_parm)
1365 char *temp_h[MAX_HISTORY];
1368 unsigned idx, i, line_len;
1370 /* NB: do not trash old history if file can't be opened */
1372 fp = fopen_for_read(st_parm->hist_file);
1374 /* clean up old history */
1375 for (idx = st_parm->cnt_history; idx > 0;) {
1377 free(st_parm->history[idx]);
1378 st_parm->history[idx] = NULL;
1381 /* fill temp_h[], retaining only last MAX_HISTORY lines */
1382 memset(temp_h, 0, sizeof(temp_h));
1384 st_parm->cnt_history_in_file = 0;
1385 while ((line = xmalloc_fgetline(fp)) != NULL) {
1386 if (line[0] == '\0') {
1392 st_parm->cnt_history_in_file++;
1394 if (idx == st_parm->max_history)
1399 /* find first non-NULL temp_h[], if any */
1400 if (st_parm->cnt_history_in_file) {
1401 while (temp_h[idx] == NULL) {
1403 if (idx == st_parm->max_history)
1408 /* copy temp_h[] to st_parm->history[] */
1409 for (i = 0; i < st_parm->max_history;) {
1414 if (idx == st_parm->max_history)
1416 line_len = strlen(line);
1417 if (line_len >= MAX_LINELEN)
1418 line[MAX_LINELEN-1] = '\0';
1419 st_parm->history[i++] = line;
1421 st_parm->cnt_history = i;
1422 if (ENABLE_FEATURE_EDITING_SAVE_ON_EXIT)
1423 st_parm->cnt_history_in_file = i;
1427 # if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1428 void save_history(line_input_t *st)
1434 if (st->cnt_history <= st->cnt_history_in_file)
1437 fp = fopen(st->hist_file, "a");
1441 line_input_t *st_temp;
1443 for (i = st->cnt_history_in_file; i < st->cnt_history; i++)
1444 fprintf(fp, "%s\n", st->history[i]);
1447 /* we may have concurrently written entries from others.
1449 st_temp = new_line_input_t(st->flags);
1450 st_temp->hist_file = st->hist_file;
1451 st_temp->max_history = st->max_history;
1452 load_history(st_temp);
1454 /* write out temp file and replace hist_file atomically */
1455 new_name = xasprintf("%s.%u.new", st->hist_file, (int) getpid());
1456 fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
1458 fp = xfdopen_for_write(fd);
1459 for (i = 0; i < st_temp->cnt_history; i++)
1460 fprintf(fp, "%s\n", st_temp->history[i]);
1462 if (rename(new_name, st->hist_file) == 0)
1463 st->cnt_history_in_file = st_temp->cnt_history;
1466 free_line_input_t(st_temp);
1470 static void save_history(char *str)
1475 if (!state->hist_file)
1478 fd = open(state->hist_file, O_WRONLY | O_CREAT | O_APPEND, 0600);
1481 xlseek(fd, 0, SEEK_END); /* paranoia */
1483 str[len] = '\n'; /* we (try to) do atomic write */
1484 len2 = full_write(fd, str, len + 1);
1487 if (len2 != len + 1)
1488 return; /* "wtf?" */
1490 /* did we write so much that history file needs trimming? */
1491 state->cnt_history_in_file++;
1492 if (state->cnt_history_in_file > state->max_history * 4) {
1494 line_input_t *st_temp;
1496 /* we may have concurrently written entries from others.
1498 st_temp = new_line_input_t(state->flags);
1499 st_temp->hist_file = state->hist_file;
1500 st_temp->max_history = state->max_history;
1501 load_history(st_temp);
1503 /* write out temp file and replace hist_file atomically */
1504 new_name = xasprintf("%s.%u.new", state->hist_file, (int) getpid());
1505 fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
1510 fp = xfdopen_for_write(fd);
1511 for (i = 0; i < st_temp->cnt_history; i++)
1512 fprintf(fp, "%s\n", st_temp->history[i]);
1514 if (rename(new_name, state->hist_file) == 0)
1515 state->cnt_history_in_file = st_temp->cnt_history;
1518 free_line_input_t(st_temp);
1523 # define load_history(a) ((void)0)
1524 # define save_history(a) ((void)0)
1525 # endif /* FEATURE_COMMAND_SAVEHISTORY */
1527 static void remember_in_history(char *str)
1531 if (!(state->flags & DO_HISTORY))
1535 i = state->cnt_history;
1536 /* Don't save dupes */
1537 if (i && strcmp(state->history[i-1], str) == 0)
1540 free(state->history[state->max_history]); /* redundant, paranoia */
1541 state->history[state->max_history] = NULL; /* redundant, paranoia */
1543 /* If history[] is full, remove the oldest command */
1544 /* we need to keep history[state->max_history] empty, hence >=, not > */
1545 if (i >= state->max_history) {
1546 free(state->history[0]);
1547 for (i = 0; i < state->max_history-1; i++)
1548 state->history[i] = state->history[i+1];
1549 /* i == state->max_history-1 */
1550 # if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1551 if (state->cnt_history_in_file)
1552 state->cnt_history_in_file--;
1555 /* i <= state->max_history-1 */
1556 state->history[i++] = xstrdup(str);
1557 /* i <= state->max_history */
1558 state->cur_history = i;
1559 state->cnt_history = i;
1560 # if ENABLE_FEATURE_EDITING_SAVEHISTORY && !ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1565 #else /* MAX_HISTORY == 0 */
1566 # define remember_in_history(a) ((void)0)
1567 #endif /* MAX_HISTORY */
1570 #if ENABLE_FEATURE_EDITING_VI
1572 * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
1575 vi_Word_motion(int eat)
1577 CHAR_T *command = command_ps;
1579 while (cursor < command_len && !BB_isspace(command[cursor]))
1581 if (eat) while (cursor < command_len && BB_isspace(command[cursor]))
1586 vi_word_motion(int eat)
1588 CHAR_T *command = command_ps;
1590 if (BB_isalnum_or_underscore(command[cursor])) {
1591 while (cursor < command_len
1592 && (BB_isalnum_or_underscore(command[cursor+1]))
1596 } else if (BB_ispunct(command[cursor])) {
1597 while (cursor < command_len && BB_ispunct(command[cursor+1]))
1601 if (cursor < command_len)
1605 while (cursor < command_len && BB_isspace(command[cursor]))
1613 CHAR_T *command = command_ps;
1616 while (cursor < command_len && BB_isspace(command[cursor]))
1618 while (cursor < command_len-1 && !BB_isspace(command[cursor+1]))
1625 CHAR_T *command = command_ps;
1627 if (cursor >= command_len-1)
1630 while (cursor < command_len-1 && BB_isspace(command[cursor]))
1632 if (cursor >= command_len-1)
1634 if (BB_isalnum_or_underscore(command[cursor])) {
1635 while (cursor < command_len-1
1636 && (BB_isalnum_or_underscore(command[cursor+1]))
1640 } else if (BB_ispunct(command[cursor])) {
1641 while (cursor < command_len-1 && BB_ispunct(command[cursor+1]))
1647 vi_Back_motion(void)
1649 CHAR_T *command = command_ps;
1651 while (cursor > 0 && BB_isspace(command[cursor-1]))
1653 while (cursor > 0 && !BB_isspace(command[cursor-1]))
1658 vi_back_motion(void)
1660 CHAR_T *command = command_ps;
1665 while (cursor > 0 && BB_isspace(command[cursor]))
1669 if (BB_isalnum_or_underscore(command[cursor])) {
1671 && (BB_isalnum_or_underscore(command[cursor-1]))
1675 } else if (BB_ispunct(command[cursor])) {
1676 while (cursor > 0 && BB_ispunct(command[cursor-1]))
1682 /* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
1683 static void ctrl_left(void)
1685 CHAR_T *command = command_ps;
1693 c = command[cursor];
1694 if (c != ' ' && !BB_ispunct(c)) {
1695 /* we reached a "word" delimited by spaces/punct.
1696 * go to its beginning */
1698 c = command[cursor - 1];
1699 if (c == ' ' || BB_ispunct(c))
1709 static void ctrl_right(void)
1711 CHAR_T *command = command_ps;
1716 c = command[cursor];
1719 if (c != ' ' && !BB_ispunct(c)) {
1720 /* we reached a "word" delimited by spaces/punct.
1721 * go to its end + 1 */
1724 c = command[cursor];
1725 if (c == BB_NUL || c == ' ' || BB_ispunct(c))
1736 * read_line_input and its helpers
1739 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
1740 static void ask_terminal(void)
1742 /* Ask terminal where is the cursor now.
1743 * lineedit_read_key handles response and corrects
1744 * our idea of current cursor position.
1745 * Testcase: run "echo -n long_line_long_line_long_line",
1746 * then type in a long, wrapping command and try to
1747 * delete it using backspace key.
1748 * Note: we print it _after_ prompt, because
1749 * prompt may contain CR. Example: PS1='\[\r\n\]\w '
1751 /* Problem: if there is buffered input on stdin,
1752 * the response will be delivered later,
1753 * possibly to an unsuspecting application.
1754 * Testcase: "sleep 1; busybox ash" + press and hold [Enter].
1756 * ~/srcdevel/bbox/fix/busybox.t4 #
1757 * ~/srcdevel/bbox/fix/busybox.t4 #
1758 * ^[[59;34~/srcdevel/bbox/fix/busybox.t4 # <-- garbage
1759 * ~/srcdevel/bbox/fix/busybox.t4 #
1761 * Checking for input with poll only makes the race narrower,
1762 * I still can trigger it. Strace:
1764 * write(1, "~/srcdevel/bbox/fix/busybox.t4 # ", 33) = 33
1765 * poll([{fd=0, events=POLLIN}], 1, 0) = 0 (Timeout) <-- no input exists
1766 * write(1, "\33[6n", 4) = 4 <-- send the ESC sequence, quick!
1767 * poll([{fd=0, events=POLLIN}], 1, -1) = 1 ([{fd=0, revents=POLLIN}])
1768 * read(0, "\n", 1) = 1 <-- oh crap, user's input got in first
1772 pfd.fd = STDIN_FILENO;
1773 pfd.events = POLLIN;
1774 if (safe_poll(&pfd, 1, 0) == 0) {
1775 S.sent_ESC_br6n = 1;
1776 fputs(ESC"[6n", stdout);
1777 fflush_all(); /* make terminal see it ASAP! */
1781 #define ask_terminal() ((void)0)
1784 /* Called just once at read_line_input() init time */
1785 #if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
1786 static void parse_and_put_prompt(const char *prmt_ptr)
1789 cmdedit_prompt = prmt_ptr;
1790 p = strrchr(prmt_ptr, '\n');
1791 cmdedit_prmt_len = unicode_strwidth(p ? p+1 : prmt_ptr);
1795 static void parse_and_put_prompt(const char *prmt_ptr)
1798 char *prmt_mem_ptr = xzalloc(1);
1799 # if ENABLE_USERNAME_OR_HOMEDIR
1800 char *cwd_buf = NULL;
1802 char flg_not_length = '[';
1805 /*cmdedit_prmt_len = 0; - already is */
1807 cbuf[1] = '\0'; /* never changes */
1810 char timebuf[sizeof("HH:MM:SS")];
1811 char *free_me = NULL;
1821 * Supported via bb_process_escape_sequence:
1822 * \a ASCII bell character (07)
1823 * \e ASCII escape character (033)
1825 * \r carriage return
1827 * \nnn char with octal code nnn
1829 * \$ if the effective UID is 0, a #, otherwise a $
1830 * \w current working directory, with $HOME abbreviated with a tilde
1831 * Note: we do not support $PROMPT_DIRTRIM=n feature
1832 * \W basename of the current working directory, with $HOME abbreviated with a tilde
1833 * \h hostname up to the first '.'
1836 * \[ begin a sequence of non-printing characters
1837 * \] end a sequence of non-printing characters
1838 * \T current time in 12-hour HH:MM:SS format
1839 * \@ current time in 12-hour am/pm format
1840 * \A current time in 24-hour HH:MM format
1841 * \t current time in 24-hour HH:MM:SS format
1842 * (all of the above work as \A)
1844 * \! history number of this command
1845 * \# command number of this command
1846 * \j number of jobs currently managed by the shell
1847 * \l basename of the shell's terminal device name
1848 * \s name of the shell, the basename of $0 (the portion following the final slash)
1849 * \V release of bash, version + patch level (e.g., 2.00.0)
1850 * \d date in "Weekday Month Date" format (e.g., "Tue May 26")
1852 * format is passed to strftime(3).
1853 * An empty format results in a locale-specific time representation.
1854 * The braces are required.
1855 * Mishandled by bb_process_escape_sequence:
1856 * \v version of bash (e.g., 2.00)
1860 if (c != 't') /* don't treat \t as tab */
1861 c = bb_process_escape_sequence(&prmt_ptr);
1862 if (prmt_ptr == cp) {
1868 # if ENABLE_USERNAME_OR_HOMEDIR
1870 pbuf = user_buf ? user_buf : (char*)"";
1875 pbuf = free_me = safe_gethostname();
1877 strchrnul(pbuf, '.')[0] = '\0';
1880 c = (geteuid() == 0 ? '#' : '$');
1882 case 'T': /* 12-hour HH:MM:SS format */
1883 case '@': /* 12-hour am/pm format */
1884 case 'A': /* 24-hour HH:MM format */
1885 case 't': /* 24-hour HH:MM:SS format */
1886 /* We show all of them as 24-hour HH:MM */
1887 strftime_HHMMSS(timebuf, sizeof(timebuf), NULL)[-3] = '\0';
1890 # if ENABLE_USERNAME_OR_HOMEDIR
1891 case 'w': /* current dir */
1892 case 'W': /* basename of cur dir */
1894 cwd_buf = xrealloc_getcwd_or_warn(NULL);
1896 cwd_buf = (char *)bb_msg_unknown;
1897 else if (home_pwd_buf[0]) {
1898 char *after_home_user;
1900 /* /home/user[/something] -> ~[/something] */
1901 after_home_user = is_prefixed_with(cwd_buf, home_pwd_buf);
1903 && (*after_home_user == '/' || *after_home_user == '\0')
1906 overlapping_strcpy(cwd_buf + 1, after_home_user);
1913 cp = strrchr(pbuf, '/');
1915 pbuf = (char*)cp + 1;
1918 // bb_process_escape_sequence does this now:
1919 // case 'e': case 'E': /* \e \E = \033 */
1922 case 'x': case 'X': {
1924 for (l = 0; l < 3;) {
1926 buf2[l++] = *prmt_ptr;
1928 h = strtoul(buf2, &pbuf, 16);
1929 if (h > UCHAR_MAX || (pbuf - buf2) < l) {
1935 c = (char)strtoul(buf2, NULL, 16);
1942 if (c == flg_not_length) {
1943 /* Toggle '['/']' hex 5b/5d */
1944 flg_not_length ^= 6;
1953 int n = strlen(pbuf);
1956 cmdedit_prmt_len = 0;
1957 else if (flg_not_length != ']') {
1958 #if 0 /*ENABLE_UNICODE_SUPPORT*/
1959 /* Won't work, pbuf is one BYTE string here instead of an one Unicode char string. */
1961 cmdedit_prmt_len += unicode_strwidth(pbuf);
1963 cmdedit_prmt_len += n;
1967 prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_size+1), pbuf);
1971 # if ENABLE_USERNAME_OR_HOMEDIR
1972 if (cwd_buf != (char *)bb_msg_unknown)
1975 cmdedit_prompt = prmt_mem_ptr;
1980 static void cmdedit_setwidth(void)
1984 cmdedit_termw = get_terminal_width(STDIN_FILENO);
1985 /* new y for current cursor */
1986 new_y = (cursor + cmdedit_prmt_len) / cmdedit_termw;
1988 redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
1991 static void win_changed(int nsig UNUSED_PARAM)
1993 if (S.ok_to_redraw) {
1994 /* We are in read_key(), safe to redraw immediately */
1995 int sv_errno = errno;
2000 /* Signal main loop that redraw is necessary */
2005 static int lineedit_read_key(char *read_key_buffer, int timeout)
2008 #if ENABLE_UNICODE_SUPPORT
2009 char unicode_buf[MB_CUR_MAX + 1];
2010 int unicode_idx = 0;
2015 /* Wait for input. TIMEOUT = -1 makes read_key wait even
2016 * on nonblocking stdin, TIMEOUT = 50 makes sure we won't
2017 * insist on full MB_CUR_MAX buffer to declare input like
2018 * "\xff\n",pause,"ls\n" invalid and thus won't lose "ls".
2020 * Note: read_key sets errno to 0 on success.
2023 ic = read_key(STDIN_FILENO, read_key_buffer, timeout);
2026 #if ENABLE_UNICODE_SUPPORT
2027 if (errno == EAGAIN && unicode_idx != 0)
2033 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
2034 if ((int32_t)ic == KEYCODE_CURSOR_POS
2037 S.sent_ESC_br6n = 0;
2038 if (cursor == 0) { /* otherwise it may be bogus */
2039 int col = ((ic >> 32) & 0x7fff) - 1;
2041 * Is col > cmdedit_prmt_len?
2042 * If yes (terminal says cursor is farther to the right
2043 * of where we think it should be),
2044 * the prompt wasn't printed starting at col 1,
2045 * there was additional text before it.
2047 if ((int)(col - cmdedit_prmt_len) > 0) {
2048 /* Fix our understanding of current x position */
2049 cmdedit_x += (col - cmdedit_prmt_len);
2050 while (cmdedit_x >= cmdedit_termw) {
2051 cmdedit_x -= cmdedit_termw;
2060 #if ENABLE_UNICODE_SUPPORT
2061 if (unicode_status == UNICODE_ON) {
2064 if ((int32_t)ic < 0) /* KEYCODE_xxx */
2066 // TODO: imagine sequence like: 0xff,<left-arrow>: we are currently losing 0xff...
2068 unicode_buf[unicode_idx++] = ic;
2069 unicode_buf[unicode_idx] = '\0';
2070 if (mbstowcs(&wc, unicode_buf, 1) != 1) {
2071 /* Not (yet?) a valid unicode char */
2072 if (unicode_idx < MB_CUR_MAX) {
2077 /* Invalid sequence. Save all "bad bytes" except first */
2078 read_key_ungets(read_key_buffer, unicode_buf + 1, unicode_idx - 1);
2079 # if !ENABLE_UNICODE_PRESERVE_BROKEN
2080 ic = CONFIG_SUBST_WCHAR;
2082 ic = unicode_mark_raw_byte(unicode_buf[0]);
2085 /* Valid unicode char, return its code */
2096 #if ENABLE_UNICODE_BIDI_SUPPORT
2097 static int isrtl_str(void)
2101 while (idx < command_len && unicode_bidi_is_neutral_wchar(command_ps[idx]))
2103 return unicode_bidi_isrtl(command_ps[idx]);
2106 # define isrtl_str() 0
2109 /* leave out the "vi-mode"-only case labels if vi editing isn't
2111 #define vi_case(caselabel) IF_FEATURE_EDITING_VI(case caselabel)
2113 /* convert uppercase ascii to equivalent control char, for readability */
2115 #define CTRL(a) ((a) & ~0x40)
2118 VI_CMDMODE_BIT = 0x40000000,
2119 /* 0x80000000 bit flags KEYCODE_xxx */
2122 #if ENABLE_FEATURE_REVERSE_SEARCH
2123 /* Mimic readline Ctrl-R reverse history search.
2124 * When invoked, it shows the following prompt:
2125 * (reverse-i-search)'': user_input [cursor pos unchanged by Ctrl-R]
2126 * and typing results in search being performed:
2127 * (reverse-i-search)'tmp': cd /tmp [cursor under t in /tmp]
2128 * Search is performed by looking at progressively older lines in history.
2129 * Ctrl-R again searches for the next match in history.
2130 * Backspace deletes last matched char.
2131 * Control keys exit search and return to normal editing (at current history line).
2133 static int32_t reverse_i_search(void)
2135 char match_buf[128]; /* for user input */
2136 char read_key_buffer[KEYCODE_BUFFER_SIZE];
2137 const char *matched_history_line;
2138 const char *saved_prompt;
2139 unsigned saved_prmt_len;
2142 matched_history_line = NULL;
2143 read_key_buffer[0] = 0;
2144 match_buf[0] = '\0';
2146 /* Save and replace the prompt */
2147 saved_prompt = cmdedit_prompt;
2148 saved_prmt_len = cmdedit_prmt_len;
2153 unsigned match_buf_len = strlen(match_buf);
2155 //FIXME: correct timeout?
2156 ic = lineedit_read_key(read_key_buffer, -1);
2159 case CTRL('R'): /* searching for the next match */
2165 if (unicode_status == UNICODE_ON) {
2166 while (match_buf_len != 0) {
2167 uint8_t c = match_buf[--match_buf_len];
2168 if ((c & 0xc0) != 0x80) /* start of UTF-8 char? */
2172 if (match_buf_len != 0)
2175 match_buf[match_buf_len] = '\0';
2180 || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
2181 || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
2186 /* Append this char */
2187 #if ENABLE_UNICODE_SUPPORT
2188 if (unicode_status == UNICODE_ON) {
2189 mbstate_t mbstate = { 0 };
2190 char buf[MB_CUR_MAX + 1];
2191 int len = wcrtomb(buf, ic, &mbstate);
2194 if (match_buf_len + len < sizeof(match_buf))
2195 strcpy(match_buf + match_buf_len, buf);
2199 if (match_buf_len < sizeof(match_buf) - 1) {
2200 match_buf[match_buf_len] = ic;
2201 match_buf[match_buf_len + 1] = '\0';
2206 /* Search in history for match_buf */
2207 h = state->cur_history;
2208 if (ic == CTRL('R'))
2211 if (state->history[h]) {
2212 char *match = strstr(state->history[h], match_buf);
2214 state->cur_history = h;
2215 matched_history_line = state->history[h];
2216 command_len = load_string(matched_history_line);
2217 cursor = match - matched_history_line;
2218 //FIXME: cursor position for Unicode case
2220 free((char*)cmdedit_prompt);
2222 cmdedit_prompt = xasprintf("(reverse-i-search)'%s': ", match_buf);
2223 cmdedit_prmt_len = unicode_strwidth(cmdedit_prompt);
2231 match_buf[match_buf_len] = '\0';
2236 redraw(cmdedit_y, command_len - cursor);
2240 if (matched_history_line)
2241 command_len = load_string(matched_history_line);
2243 free((char*)cmdedit_prompt);
2244 cmdedit_prompt = saved_prompt;
2245 cmdedit_prmt_len = saved_prmt_len;
2246 redraw(cmdedit_y, command_len - cursor);
2252 /* maxsize must be >= 2.
2254 * -1 on read errors or EOF, or on bare Ctrl-D,
2255 * 0 on ctrl-C (the line entered is still returned in 'command'),
2256 * (in both cases the cursor remains on the input line, '\n' is not printed)
2257 * >0 length of input string, including terminating '\n'
2259 int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout)
2262 #if ENABLE_FEATURE_TAB_COMPLETION
2263 smallint lastWasTab = 0;
2265 smallint break_out = 0;
2266 #if ENABLE_FEATURE_EDITING_VI
2267 smallint vi_cmdmode = 0;
2269 struct termios initial_settings;
2270 struct termios new_settings;
2271 char read_key_buffer[KEYCODE_BUFFER_SIZE];
2275 if (tcgetattr(STDIN_FILENO, &initial_settings) < 0
2276 || (initial_settings.c_lflag & (ECHO|ICANON)) == ICANON
2278 /* Happens when e.g. stty -echo was run before.
2279 * But if ICANON is not set, we don't come here.
2280 * (example: interactive python ^Z-backgrounded,
2281 * tty is still in "raw mode").
2283 parse_and_put_prompt(prompt);
2285 if (fgets(command, maxsize, stdin) == NULL)
2286 len = -1; /* EOF or error */
2288 len = strlen(command);
2295 // FIXME: audit & improve this
2296 if (maxsize > MAX_LINELEN)
2297 maxsize = MAX_LINELEN;
2298 S.maxsize = maxsize;
2300 /* With zero flags, no other fields are ever used */
2301 state = st ? st : (line_input_t*) &const_int_0;
2303 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
2304 if (state->hist_file)
2305 if (state->cnt_history == 0)
2306 load_history(state);
2308 if (state->flags & DO_HISTORY)
2309 state->cur_history = state->cnt_history;
2312 /* prepare before init handlers */
2313 cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
2315 #if ENABLE_UNICODE_SUPPORT
2316 command_ps = xzalloc(maxsize * sizeof(command_ps[0]));
2318 command_ps = command;
2321 #define command command_must_not_be_used
2323 new_settings = initial_settings;
2324 /* ~ICANON: unbuffered input (most c_cc[] are disabled, VMIN/VTIME are enabled) */
2325 /* ~ECHO, ~ECHONL: turn off echoing, including newline echoing */
2326 /* ~ISIG: turn off INTR (ctrl-C), QUIT, SUSP */
2327 new_settings.c_lflag &= ~(ICANON | ECHO | ECHONL | ISIG);
2328 /* reads will block only if < 1 char is available */
2329 new_settings.c_cc[VMIN] = 1;
2330 /* no timeout (reads block forever) */
2331 new_settings.c_cc[VTIME] = 0;
2332 /* Should be not needed if ISIG is off: */
2333 /* Turn off CTRL-C */
2334 /* new_settings.c_cc[VINTR] = _POSIX_VDISABLE; */
2335 tcsetattr_stdin_TCSANOW(&new_settings);
2337 #if ENABLE_USERNAME_OR_HOMEDIR
2339 struct passwd *entry;
2341 entry = getpwuid(geteuid());
2343 user_buf = xstrdup(entry->pw_name);
2344 home_pwd_buf = xstrdup(entry->pw_dir);
2350 for (i = 0; i <= state->max_history; i++)
2351 bb_error_msg("history[%d]:'%s'", i, state->history[i]);
2352 bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
2355 /* Print out the command prompt, optionally ask where cursor is */
2356 parse_and_put_prompt(prompt);
2359 /* Install window resize handler (NB: after *all* init is complete) */
2360 S.SIGWINCH_handler.sa_handler = win_changed;
2361 S.SIGWINCH_handler.sa_flags = SA_RESTART;
2362 sigaction(SIGWINCH, &S.SIGWINCH_handler, &S.SIGWINCH_handler);
2364 cmdedit_termw = get_terminal_width(STDIN_FILENO);
2366 read_key_buffer[0] = 0;
2369 * The emacs and vi modes share much of the code in the big
2370 * command loop. Commands entered when in vi's command mode
2371 * (aka "escape mode") get an extra bit added to distinguish
2372 * them - this keeps them from being self-inserted. This
2373 * clutters the big switch a bit, but keeps all the code
2379 count = S.SIGWINCH_count;
2380 if (S.SIGWINCH_saved != count) {
2381 S.SIGWINCH_saved = count;
2385 ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
2387 #if ENABLE_FEATURE_REVERSE_SEARCH
2390 #if ENABLE_FEATURE_EDITING_VI
2393 /* btw, since KEYCODE_xxx are all < 0, this doesn't
2394 * change ic if it contains one of them: */
2395 ic |= VI_CMDMODE_BIT;
2402 vi_case('\n'|VI_CMDMODE_BIT:)
2403 vi_case('\r'|VI_CMDMODE_BIT:)
2409 vi_case('0'|VI_CMDMODE_BIT:)
2410 /* Control-a -- Beginning of line */
2411 input_backward(cursor);
2414 vi_case('h'|VI_CMDMODE_BIT:)
2415 vi_case('\b'|VI_CMDMODE_BIT:) /* ^H */
2416 vi_case('\x7f'|VI_CMDMODE_BIT:) /* DEL */
2417 input_backward(1); /* Move back one character */
2420 vi_case('$'|VI_CMDMODE_BIT:)
2421 /* Control-e -- End of line */
2422 put_till_end_and_adv_cursor();
2425 vi_case('l'|VI_CMDMODE_BIT:)
2426 vi_case(' '|VI_CMDMODE_BIT:)
2427 input_forward(); /* Move forward one character */
2430 case '\x7f': /* DEL */
2436 case KEYCODE_DELETE:
2442 #if ENABLE_FEATURE_TAB_COMPLETION
2444 input_tab(&lastWasTab);
2448 /* Control-k -- clear to end of line */
2449 command_ps[cursor] = BB_NUL;
2450 command_len = cursor;
2451 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
2454 vi_case(CTRL('L')|VI_CMDMODE_BIT:)
2455 /* Control-l -- clear screen */
2456 printf(ESC"[H"); /* cursor to top,left */
2457 redraw(0, command_len - cursor);
2461 vi_case(CTRL('N')|VI_CMDMODE_BIT:)
2462 vi_case('j'|VI_CMDMODE_BIT:)
2463 /* Control-n -- Get next command in history */
2464 if (get_next_history())
2468 vi_case(CTRL('P')|VI_CMDMODE_BIT:)
2469 vi_case('k'|VI_CMDMODE_BIT:)
2470 /* Control-p -- Get previous command from history */
2471 if (get_previous_history())
2476 vi_case(CTRL('U')|VI_CMDMODE_BIT:)
2477 /* Control-U -- Clear line before cursor */
2479 command_len -= cursor;
2480 memmove(command_ps, command_ps + cursor,
2481 (command_len + 1) * sizeof(command_ps[0]));
2482 redraw(cmdedit_y, command_len);
2486 vi_case(CTRL('W')|VI_CMDMODE_BIT:)
2487 /* Control-W -- Remove the last word */
2488 while (cursor > 0 && BB_isspace(command_ps[cursor-1]))
2490 while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
2493 case KEYCODE_ALT_D: {
2494 /* Delete word forward */
2495 int nc, sc = cursor;
2503 case KEYCODE_ALT_BACKSPACE: {
2504 /* Delete word backward */
2507 while (sc-- > cursor)
2511 #if ENABLE_FEATURE_REVERSE_SEARCH
2513 ic = ic_raw = reverse_i_search();
2517 #if ENABLE_FEATURE_EDITING_VI
2518 case 'i'|VI_CMDMODE_BIT:
2521 case 'I'|VI_CMDMODE_BIT:
2522 input_backward(cursor);
2525 case 'a'|VI_CMDMODE_BIT:
2529 case 'A'|VI_CMDMODE_BIT:
2530 put_till_end_and_adv_cursor();
2533 case 'x'|VI_CMDMODE_BIT:
2536 case 'X'|VI_CMDMODE_BIT:
2542 case 'W'|VI_CMDMODE_BIT:
2545 case 'w'|VI_CMDMODE_BIT:
2548 case 'E'|VI_CMDMODE_BIT:
2551 case 'e'|VI_CMDMODE_BIT:
2554 case 'B'|VI_CMDMODE_BIT:
2557 case 'b'|VI_CMDMODE_BIT:
2560 case 'C'|VI_CMDMODE_BIT:
2563 case 'D'|VI_CMDMODE_BIT:
2566 case 'c'|VI_CMDMODE_BIT:
2569 case 'd'|VI_CMDMODE_BIT: {
2572 ic = lineedit_read_key(read_key_buffer, timeout);
2573 if (errno) /* error */
2574 goto return_error_indicator;
2575 if (ic == ic_raw) { /* "cc", "dd" */
2576 input_backward(cursor);
2588 case 'w': /* "dw", "cw" */
2589 vi_word_motion(vi_cmdmode);
2591 case 'W': /* 'dW', 'cW' */
2592 vi_Word_motion(vi_cmdmode);
2594 case 'e': /* 'de', 'ce' */
2598 case 'E': /* 'dE', 'cE' */
2604 input_backward(cursor - sc);
2605 while (nc-- > cursor)
2608 case 'b': /* "db", "cb" */
2609 case 'B': /* implemented as B */
2614 while (sc-- > cursor)
2617 case ' ': /* "d ", "c " */
2620 case '$': /* "d$", "c$" */
2622 while (cursor < command_len)
2628 case 'p'|VI_CMDMODE_BIT:
2631 case 'P'|VI_CMDMODE_BIT:
2634 case 'r'|VI_CMDMODE_BIT:
2635 //FIXME: unicode case?
2636 ic = lineedit_read_key(read_key_buffer, timeout);
2637 if (errno) /* error */
2638 goto return_error_indicator;
2639 if (ic < ' ' || ic > 255) {
2642 command_ps[cursor] = ic;
2647 case '\x1b': /* ESC */
2648 if (state->flags & VI_MODE) {
2649 /* insert mode --> command mode */
2654 #endif /* FEATURE_COMMAND_EDITING_VI */
2658 if (get_previous_history())
2663 if (!get_next_history())
2666 /* Rewrite the line with the selected history item */
2667 /* change command */
2668 command_len = load_string(state->history[state->cur_history] ?
2669 state->history[state->cur_history] : "");
2670 /* redraw and go to eol (bol, in vi) */
2671 redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
2680 case KEYCODE_CTRL_LEFT:
2681 case KEYCODE_ALT_LEFT: /* bash doesn't do it */
2684 case KEYCODE_CTRL_RIGHT:
2685 case KEYCODE_ALT_RIGHT: /* bash doesn't do it */
2689 input_backward(cursor);
2692 put_till_end_and_adv_cursor();
2696 if (initial_settings.c_cc[VINTR] != 0
2697 && ic_raw == initial_settings.c_cc[VINTR]
2699 /* Ctrl-C (usually) - stop gathering input */
2701 break_out = -1; /* "do not append '\n'" */
2704 if (initial_settings.c_cc[VEOF] != 0
2705 && ic_raw == initial_settings.c_cc[VEOF]
2707 /* Ctrl-D (usually) - delete one character,
2708 * or exit if len=0 and no chars to delete */
2709 if (command_len == 0) {
2712 case -1: /* error (e.g. EIO when tty is destroyed) */
2713 IF_FEATURE_EDITING_VI(return_error_indicator:)
2714 break_out = command_len = -1;
2720 // /* Control-V -- force insert of next char */
2721 // if (c == CTRL('V')) {
2722 // if (safe_read(STDIN_FILENO, &c, 1) < 1)
2723 // goto return_error_indicator;
2730 || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
2731 || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
2733 /* If VI_CMDMODE_BIT is set, ic is >= 256
2734 * and vi mode ignores unexpected chars.
2735 * Otherwise, we are here if ic is a
2736 * control char or an unhandled ESC sequence,
2737 * which is also ignored.
2741 if ((int)command_len >= (maxsize - 2)) {
2742 /* Not enough space for the char and EOL */
2747 if (cursor == (command_len - 1)) {
2748 /* We are at the end, append */
2749 command_ps[cursor] = ic;
2750 command_ps[cursor + 1] = BB_NUL;
2751 put_cur_glyph_and_inc_cursor();
2752 if (unicode_bidi_isrtl(ic))
2755 /* In the middle, insert */
2758 memmove(command_ps + sc + 1, command_ps + sc,
2759 (command_len - sc) * sizeof(command_ps[0]));
2760 command_ps[sc] = ic;
2761 /* is right-to-left char, or neutral one (e.g. comma) was just added to rtl text? */
2764 put_till_end_and_adv_cursor();
2765 /* to prev x pos + 1 */
2766 input_backward(cursor - sc);
2774 #if ENABLE_FEATURE_TAB_COMPLETION
2780 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
2781 if (S.sent_ESC_br6n) {
2782 /* "sleep 1; busybox ash" + hold [Enter] to trigger.
2783 * We sent "ESC [ 6 n", but got '\n' first, and
2784 * KEYCODE_CURSOR_POS response is now buffered from terminal.
2785 * It's bad already and not much can be done with it
2786 * (it _will_ be visible for the next process to read stdin),
2787 * but without this delay it even shows up on the screen
2788 * as garbage because we restore echo settings with tcsetattr
2789 * before it comes in. UGLY!
2795 /* End of bug-catching "command_must_not_be_used" trick */
2798 #if ENABLE_UNICODE_SUPPORT
2800 if (command_len > 0)
2801 command_len = save_string(command, maxsize - 1);
2805 if (command_len > 0) {
2806 remember_in_history(command);
2809 if (break_out > 0) {
2810 command[command_len++] = '\n';
2811 command[command_len] = '\0';
2814 #if ENABLE_FEATURE_TAB_COMPLETION
2815 free_tab_completion_data();
2818 /* restore initial_settings */
2819 tcsetattr_stdin_TCSANOW(&initial_settings);
2820 /* restore SIGWINCH handler */
2821 sigaction_set(SIGWINCH, &S.SIGWINCH_handler);
2827 return len; /* can't return command_len, DEINIT_S() destroys it */
2830 #else /* !FEATURE_EDITING */
2832 #undef read_line_input
2833 int FAST_FUNC read_line_input(const char* prompt, char* command, int maxsize)
2835 fputs(prompt, stdout);
2837 if (!fgets(command, maxsize, stdin))
2839 return strlen(command);
2842 #endif /* !FEATURE_EDITING */
2853 const char *applet_name = "debug stuff usage";
2855 int main(int argc, char **argv)
2857 char buff[MAX_LINELEN];
2859 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
2860 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
2861 "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
2862 "\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
2869 l = read_line_input(prompt, buff);
2870 if (l <= 0 || buff[l-1] != '\n')
2873 printf("*** read_line_input() returned line =%s=\n", buff);
2875 printf("*** read_line_input() detect ^D\n");