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)
2261 /* Happens when e.g. stty -echo was run before */
2262 parse_and_put_prompt(prompt);
2263 /* fflush_all(); - done by parse_and_put_prompt */
2264 if (fgets(command, maxsize, stdin) == NULL)
2265 len = -1; /* EOF or error */
2267 len = strlen(command);
2274 // FIXME: audit & improve this
2275 if (maxsize > MAX_LINELEN)
2276 maxsize = MAX_LINELEN;
2277 S.maxsize = maxsize;
2279 /* With zero flags, no other fields are ever used */
2280 state = st ? st : (line_input_t*) &const_int_0;
2282 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
2283 if (state->hist_file)
2284 if (state->cnt_history == 0)
2285 load_history(state);
2287 if (state->flags & DO_HISTORY)
2288 state->cur_history = state->cnt_history;
2291 /* prepare before init handlers */
2292 cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
2294 #if ENABLE_UNICODE_SUPPORT
2295 command_ps = xzalloc(maxsize * sizeof(command_ps[0]));
2297 command_ps = command;
2300 #define command command_must_not_be_used
2302 new_settings = initial_settings;
2303 /* ~ICANON: unbuffered input (most c_cc[] are disabled, VMIN/VTIME are enabled) */
2304 /* ~ECHO, ~ECHONL: turn off echoing, including newline echoing */
2305 /* ~ISIG: turn off INTR (ctrl-C), QUIT, SUSP */
2306 new_settings.c_lflag &= ~(ICANON | ECHO | ECHONL | ISIG);
2307 /* reads would block only if < 1 char is available */
2308 new_settings.c_cc[VMIN] = 1;
2309 /* no timeout (reads block forever) */
2310 new_settings.c_cc[VTIME] = 0;
2311 /* Should be not needed if ISIG is off: */
2312 /* Turn off CTRL-C */
2313 /* new_settings.c_cc[VINTR] = _POSIX_VDISABLE; */
2314 tcsetattr_stdin_TCSANOW(&new_settings);
2316 #if ENABLE_USERNAME_OR_HOMEDIR
2318 struct passwd *entry;
2320 entry = getpwuid(geteuid());
2322 user_buf = xstrdup(entry->pw_name);
2323 home_pwd_buf = xstrdup(entry->pw_dir);
2329 for (i = 0; i <= state->max_history; i++)
2330 bb_error_msg("history[%d]:'%s'", i, state->history[i]);
2331 bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
2334 /* Print out the command prompt, optionally ask where cursor is */
2335 parse_and_put_prompt(prompt);
2338 /* Install window resize handler (NB: after *all* init is complete) */
2339 //FIXME: save entire sigaction!
2340 previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
2341 win_changed(0); /* get initial window size */
2343 read_key_buffer[0] = 0;
2346 * The emacs and vi modes share much of the code in the big
2347 * command loop. Commands entered when in vi's command mode
2348 * (aka "escape mode") get an extra bit added to distinguish
2349 * them - this keeps them from being self-inserted. This
2350 * clutters the big switch a bit, but keeps all the code
2356 ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
2358 #if ENABLE_FEATURE_REVERSE_SEARCH
2361 #if ENABLE_FEATURE_EDITING_VI
2364 /* btw, since KEYCODE_xxx are all < 0, this doesn't
2365 * change ic if it contains one of them: */
2366 ic |= VI_CMDMODE_BIT;
2373 vi_case('\n'|VI_CMDMODE_BIT:)
2374 vi_case('\r'|VI_CMDMODE_BIT:)
2380 vi_case('0'|VI_CMDMODE_BIT:)
2381 /* Control-a -- Beginning of line */
2382 input_backward(cursor);
2385 vi_case('h'|VI_CMDMODE_BIT:)
2386 vi_case('\b'|VI_CMDMODE_BIT:) /* ^H */
2387 vi_case('\x7f'|VI_CMDMODE_BIT:) /* DEL */
2388 input_backward(1); /* Move back one character */
2391 vi_case('$'|VI_CMDMODE_BIT:)
2392 /* Control-e -- End of line */
2393 put_till_end_and_adv_cursor();
2396 vi_case('l'|VI_CMDMODE_BIT:)
2397 vi_case(' '|VI_CMDMODE_BIT:)
2398 input_forward(); /* Move forward one character */
2401 case '\x7f': /* DEL */
2407 case KEYCODE_DELETE:
2413 #if ENABLE_FEATURE_TAB_COMPLETION
2415 input_tab(&lastWasTab);
2419 /* Control-k -- clear to end of line */
2420 command_ps[cursor] = BB_NUL;
2421 command_len = cursor;
2422 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
2425 vi_case(CTRL('L')|VI_CMDMODE_BIT:)
2426 /* Control-l -- clear screen */
2427 printf(ESC"[H"); /* cursor to top,left */
2428 redraw(0, command_len - cursor);
2432 vi_case(CTRL('N')|VI_CMDMODE_BIT:)
2433 vi_case('j'|VI_CMDMODE_BIT:)
2434 /* Control-n -- Get next command in history */
2435 if (get_next_history())
2439 vi_case(CTRL('P')|VI_CMDMODE_BIT:)
2440 vi_case('k'|VI_CMDMODE_BIT:)
2441 /* Control-p -- Get previous command from history */
2442 if (get_previous_history())
2447 vi_case(CTRL('U')|VI_CMDMODE_BIT:)
2448 /* Control-U -- Clear line before cursor */
2450 command_len -= cursor;
2451 memmove(command_ps, command_ps + cursor,
2452 (command_len + 1) * sizeof(command_ps[0]));
2453 redraw(cmdedit_y, command_len);
2457 vi_case(CTRL('W')|VI_CMDMODE_BIT:)
2458 /* Control-W -- Remove the last word */
2459 while (cursor > 0 && BB_isspace(command_ps[cursor-1]))
2461 while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
2464 #if ENABLE_FEATURE_REVERSE_SEARCH
2466 ic = ic_raw = reverse_i_search();
2470 #if ENABLE_FEATURE_EDITING_VI
2471 case 'i'|VI_CMDMODE_BIT:
2474 case 'I'|VI_CMDMODE_BIT:
2475 input_backward(cursor);
2478 case 'a'|VI_CMDMODE_BIT:
2482 case 'A'|VI_CMDMODE_BIT:
2483 put_till_end_and_adv_cursor();
2486 case 'x'|VI_CMDMODE_BIT:
2489 case 'X'|VI_CMDMODE_BIT:
2495 case 'W'|VI_CMDMODE_BIT:
2498 case 'w'|VI_CMDMODE_BIT:
2501 case 'E'|VI_CMDMODE_BIT:
2504 case 'e'|VI_CMDMODE_BIT:
2507 case 'B'|VI_CMDMODE_BIT:
2510 case 'b'|VI_CMDMODE_BIT:
2513 case 'C'|VI_CMDMODE_BIT:
2516 case 'D'|VI_CMDMODE_BIT:
2519 case 'c'|VI_CMDMODE_BIT:
2522 case 'd'|VI_CMDMODE_BIT: {
2525 ic = lineedit_read_key(read_key_buffer, timeout);
2526 if (errno) /* error */
2527 goto return_error_indicator;
2528 if (ic == ic_raw) { /* "cc", "dd" */
2529 input_backward(cursor);
2541 case 'w': /* "dw", "cw" */
2542 vi_word_motion(vi_cmdmode);
2544 case 'W': /* 'dW', 'cW' */
2545 vi_Word_motion(vi_cmdmode);
2547 case 'e': /* 'de', 'ce' */
2551 case 'E': /* 'dE', 'cE' */
2557 input_backward(cursor - sc);
2558 while (nc-- > cursor)
2561 case 'b': /* "db", "cb" */
2562 case 'B': /* implemented as B */
2567 while (sc-- > cursor)
2570 case ' ': /* "d ", "c " */
2573 case '$': /* "d$", "c$" */
2575 while (cursor < command_len)
2581 case 'p'|VI_CMDMODE_BIT:
2584 case 'P'|VI_CMDMODE_BIT:
2587 case 'r'|VI_CMDMODE_BIT:
2588 //FIXME: unicode case?
2589 ic = lineedit_read_key(read_key_buffer, timeout);
2590 if (errno) /* error */
2591 goto return_error_indicator;
2592 if (ic < ' ' || ic > 255) {
2595 command_ps[cursor] = ic;
2600 case '\x1b': /* ESC */
2601 if (state->flags & VI_MODE) {
2602 /* insert mode --> command mode */
2606 /* Handle a few ESC-<key> combinations the same way
2607 * standard readline bindings (IOW: bash) do.
2608 * Often, Alt-<key> generates ESC-<key>.
2610 ic = lineedit_read_key(read_key_buffer, timeout);
2612 //case KEYCODE_LEFT: - bash doesn't do this
2616 //case KEYCODE_RIGHT: - bash doesn't do this
2620 //case KEYCODE_DELETE: - bash doesn't do this
2621 case 'd': /* Alt-D */
2623 /* Delete word forward */
2624 int nc, sc = cursor;
2632 case '\b': /* Alt-Backspace(?) */
2633 case '\x7f': /* Alt-Backspace(?) */
2634 //case 'w': - bash doesn't do this
2636 /* Delete word backward */
2639 while (sc-- > cursor)
2645 #endif /* FEATURE_COMMAND_EDITING_VI */
2649 if (get_previous_history())
2654 if (!get_next_history())
2657 /* Rewrite the line with the selected history item */
2658 /* change command */
2659 command_len = load_string(state->history[state->cur_history] ?
2660 state->history[state->cur_history] : "");
2661 /* redraw and go to eol (bol, in vi) */
2662 redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
2671 case KEYCODE_CTRL_LEFT:
2672 case KEYCODE_ALT_LEFT: /* bash doesn't do it */
2675 case KEYCODE_CTRL_RIGHT:
2676 case KEYCODE_ALT_RIGHT: /* bash doesn't do it */
2680 input_backward(cursor);
2683 put_till_end_and_adv_cursor();
2687 if (initial_settings.c_cc[VINTR] != 0
2688 && ic_raw == initial_settings.c_cc[VINTR]
2690 /* Ctrl-C (usually) - stop gathering input */
2693 break_out = -1; /* "do not append '\n'" */
2696 if (initial_settings.c_cc[VEOF] != 0
2697 && ic_raw == initial_settings.c_cc[VEOF]
2699 /* Ctrl-D (usually) - delete one character,
2700 * or exit if len=0 and no chars to delete */
2701 if (command_len == 0) {
2704 case -1: /* error (e.g. EIO when tty is destroyed) */
2705 IF_FEATURE_EDITING_VI(return_error_indicator:)
2706 break_out = command_len = -1;
2712 // /* Control-V -- force insert of next char */
2713 // if (c == CTRL('V')) {
2714 // if (safe_read(STDIN_FILENO, &c, 1) < 1)
2715 // goto return_error_indicator;
2722 || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
2723 || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
2725 /* If VI_CMDMODE_BIT is set, ic is >= 256
2726 * and vi mode ignores unexpected chars.
2727 * Otherwise, we are here if ic is a
2728 * control char or an unhandled ESC sequence,
2729 * which is also ignored.
2733 if ((int)command_len >= (maxsize - 2)) {
2734 /* Not enough space for the char and EOL */
2739 if (cursor == (command_len - 1)) {
2740 /* We are at the end, append */
2741 command_ps[cursor] = ic;
2742 command_ps[cursor + 1] = BB_NUL;
2743 put_cur_glyph_and_inc_cursor();
2744 if (unicode_bidi_isrtl(ic))
2747 /* In the middle, insert */
2750 memmove(command_ps + sc + 1, command_ps + sc,
2751 (command_len - sc) * sizeof(command_ps[0]));
2752 command_ps[sc] = ic;
2753 /* is right-to-left char, or neutral one (e.g. comma) was just added to rtl text? */
2756 put_till_end_and_adv_cursor();
2757 /* to prev x pos + 1 */
2758 input_backward(cursor - sc);
2766 #if ENABLE_FEATURE_TAB_COMPLETION
2772 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
2773 if (S.sent_ESC_br6n) {
2774 /* "sleep 1; busybox ash" + hold [Enter] to trigger.
2775 * We sent "ESC [ 6 n", but got '\n' first, and
2776 * KEYCODE_CURSOR_POS response is now buffered from terminal.
2777 * It's bad already and not much can be done with it
2778 * (it _will_ be visible for the next process to read stdin),
2779 * but without this delay it even shows up on the screen
2780 * as garbage because we restore echo settings with tcsetattr
2781 * before it comes in. UGLY!
2787 /* End of bug-catching "command_must_not_be_used" trick */
2790 #if ENABLE_UNICODE_SUPPORT
2792 if (command_len > 0)
2793 command_len = save_string(command, maxsize - 1);
2797 if (command_len > 0) {
2798 remember_in_history(command);
2801 if (break_out > 0) {
2802 command[command_len++] = '\n';
2803 command[command_len] = '\0';
2806 #if ENABLE_FEATURE_TAB_COMPLETION
2807 free_tab_completion_data();
2810 /* restore initial_settings */
2811 tcsetattr_stdin_TCSANOW(&initial_settings);
2812 /* restore SIGWINCH handler */
2813 signal(SIGWINCH, previous_SIGWINCH_handler);
2819 return len; /* can't return command_len, DEINIT_S() destroys it */
2822 #else /* !FEATURE_EDITING */
2824 #undef read_line_input
2825 int FAST_FUNC read_line_input(const char* prompt, char* command, int maxsize)
2827 fputs(prompt, stdout);
2829 if (!fgets(command, maxsize, stdin))
2831 return strlen(command);
2834 #endif /* !FEATURE_EDITING */
2845 const char *applet_name = "debug stuff usage";
2847 int main(int argc, char **argv)
2849 char buff[MAX_LINELEN];
2851 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
2852 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
2853 "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
2854 "\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
2861 l = read_line_input(prompt, buff);
2862 if (l <= 0 || buff[l-1] != '\n')
2865 printf("*** read_line_input() returned line =%s=\n", buff);
2867 printf("*** read_line_input() detect ^D\n");