1 /* vi: set sw=4 ts=4: */
3 * Termios command line History and 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 \$\[\033[00m\] '
45 /* FIXME: obsolete CONFIG item? */
46 #define ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT 0
49 # define ENABLE_FEATURE_EDITING 0
50 # define ENABLE_FEATURE_TAB_COMPLETION 0
51 # define ENABLE_FEATURE_USERNAME_COMPLETION 0
52 # define ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT 0
56 /* Entire file (except TESTing part) sits inside this #if */
57 #if ENABLE_FEATURE_EDITING
60 #define ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR \
61 (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
62 #define IF_FEATURE_GETUSERNAME_AND_HOMEDIR(...)
63 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
64 #undef IF_FEATURE_GETUSERNAME_AND_HOMEDIR
65 #define IF_FEATURE_GETUSERNAME_AND_HOMEDIR(...) __VA_ARGS__
70 #if ENABLE_FEATURE_ASSUME_UNICODE
72 # define CHAR_T wchar_t
73 static bool BB_isspace(CHAR_T c) { return ((unsigned)c < 256 && isspace(c)); }
74 # if ENABLE_FEATURE_EDITING_VI
75 static bool BB_isalnum(CHAR_T c) { return ((unsigned)c < 256 && isalnum(c)); }
77 static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); }
82 # define isspace isspace_must_not_be_used
83 # define isalnum isalnum_must_not_be_used
84 # define ispunct ispunct_must_not_be_used
85 # define isprint isprint_must_not_be_used
89 # define BB_isspace(c) isspace(c)
90 # define BB_isalnum(c) isalnum(c)
91 # define BB_ispunct(c) ispunct(c)
96 /* We use int16_t for positions, need to limit line len */
97 MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0
98 ? CONFIG_FEATURE_EDITING_MAX_LEN
102 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
103 static const char null_str[] ALIGN1 = "";
106 /* We try to minimize both static and stack usage. */
107 struct lineedit_statics {
110 volatile unsigned cmdedit_termw; /* = 80; */ /* actual terminal width */
111 sighandler_t previous_SIGWINCH_handler;
113 unsigned cmdedit_x; /* real x (col) terminal position */
114 unsigned cmdedit_y; /* pseudoreal y (row) terminal position */
115 unsigned cmdedit_prmt_len; /* length of prompt (without colors etc) */
118 int command_len; /* must be signed */
119 /* signed maxsize: we want x in "if (x > S.maxsize)"
120 * to _not_ be promoted to unsigned */
124 const char *cmdedit_prompt;
125 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
126 int num_ok_lines; /* = 1; */
129 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
131 char *home_pwd_buf; /* = (char*)null_str; */
134 #if ENABLE_FEATURE_TAB_COMPLETION
136 unsigned num_matches;
139 #if ENABLE_FEATURE_EDITING_VI
140 #define DELBUFSIZ 128
142 smallint newdelflag; /* whether delbuf should be reused yet */
143 CHAR_T delbuf[DELBUFSIZ]; /* a place to store deleted characters */
145 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
146 smallint sent_ESC_br6n;
149 /* Formerly these were big buffers on stack: */
150 #if ENABLE_FEATURE_TAB_COMPLETION
151 char exe_n_cwd_tab_completion__dirbuf[MAX_LINELEN];
152 char input_tab__matchBuf[MAX_LINELEN];
153 int16_t find_match__int_buf[MAX_LINELEN + 1]; /* need to have 9 bits at least */
154 int16_t find_match__pos_buf[MAX_LINELEN + 1];
158 /* See lineedit_ptr_hack.c */
159 extern struct lineedit_statics *const lineedit_ptr_to_statics;
161 #define S (*lineedit_ptr_to_statics)
162 #define state (S.state )
163 #define cmdedit_termw (S.cmdedit_termw )
164 #define previous_SIGWINCH_handler (S.previous_SIGWINCH_handler)
165 #define cmdedit_x (S.cmdedit_x )
166 #define cmdedit_y (S.cmdedit_y )
167 #define cmdedit_prmt_len (S.cmdedit_prmt_len)
168 #define cursor (S.cursor )
169 #define command_len (S.command_len )
170 #define command_ps (S.command_ps )
171 #define cmdedit_prompt (S.cmdedit_prompt )
172 #define num_ok_lines (S.num_ok_lines )
173 #define user_buf (S.user_buf )
174 #define home_pwd_buf (S.home_pwd_buf )
175 #define matches (S.matches )
176 #define num_matches (S.num_matches )
177 #define delptr (S.delptr )
178 #define newdelflag (S.newdelflag )
179 #define delbuf (S.delbuf )
181 #define INIT_S() do { \
182 (*(struct lineedit_statics**)&lineedit_ptr_to_statics) = xzalloc(sizeof(S)); \
184 cmdedit_termw = 80; \
185 IF_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines = 1;) \
186 IF_FEATURE_GETUSERNAME_AND_HOMEDIR(home_pwd_buf = (char*)null_str;) \
188 static void deinit_S(void)
190 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
191 /* This one is allocated only if FANCY_PROMPT is on
192 * (otherwise it points to verbatim prompt (NOT malloced) */
193 free((char*)cmdedit_prompt);
195 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
197 if (home_pwd_buf != null_str)
200 free(lineedit_ptr_to_statics);
202 #define DEINIT_S() deinit_S()
205 #if ENABLE_FEATURE_ASSUME_UNICODE
206 static size_t load_string(const char *src, int maxsize)
208 ssize_t len = mbstowcs(command_ps, src, maxsize - 1);
211 command_ps[len] = L'\0';
214 static size_t save_string(char *dst, int maxsize)
216 ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
222 /* I thought just fputwc(c, stdout) would work. But no... */
223 static void BB_PUTCHAR(wchar_t c)
225 char buf[MB_CUR_MAX + 1];
226 mbstate_t mbst = { 0 };
227 ssize_t len = wcrtomb(buf, c, &mbst);
235 static size_t load_string(const char *src, int maxsize)
237 safe_strncpy(command_ps, src, maxsize);
238 return strlen(command_ps);
240 # if ENABLE_FEATURE_TAB_COMPLETION
241 static void save_string(char *dst, int maxsize)
243 safe_strncpy(dst, command_ps, maxsize);
246 # define BB_PUTCHAR(c) bb_putchar(c)
250 /* Put 'command_ps[cursor]', cursor++.
251 * Advance cursor on screen. If we reached right margin, scroll text up
252 * and remove terminal margin effect by printing 'next_char' */
253 #define HACK_FOR_WRONG_WIDTH 1
254 #if HACK_FOR_WRONG_WIDTH
255 static void cmdedit_set_out_char(void)
256 #define cmdedit_set_out_char(next_char) cmdedit_set_out_char()
258 static void cmdedit_set_out_char(int next_char)
261 CHAR_T c = command_ps[cursor];
264 /* erase character after end of input string */
267 #if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
268 /* Display non-printable characters in reverse */
269 if (!BB_isprint(c)) {
276 printf("\033[7m%c\033[0m", c);
282 if (++cmdedit_x >= cmdedit_termw) {
283 /* terminal is scrolled down */
286 #if HACK_FOR_WRONG_WIDTH
287 /* This works better if our idea of term width is wrong
288 * and it is actually wider (often happens on serial lines).
289 * Printing CR,LF *forces* cursor to next line.
290 * OTOH if terminal width is correct AND terminal does NOT
291 * have automargin (IOW: it is moving cursor to next line
292 * by itself (which is wrong for VT-10x terminals)),
293 * this will break things: there will be one extra empty line */
294 puts("\r"); /* + implicit '\n' */
296 /* Works ok only if cmdedit_termw is correct */
297 /* destroy "(auto)margin" */
298 bb_putchar(next_char);
302 // Huh? What if command_ps[cursor] == BB_NUL (we are at the end already?)
306 /* Move to end of line (by printing all chars till the end) */
307 static void input_end(void)
309 while (cursor < command_len)
310 cmdedit_set_out_char(' ');
313 /* Go to the next line */
314 static void goto_new_line(void)
322 static void out1str(const char *s)
328 static void beep(void)
333 /* Move back one character */
334 /* (optimized for slow terminals) */
335 static void input_backward(unsigned num)
345 if (cmdedit_x >= num) {
348 /* This is longer by 5 bytes on x86.
349 * Also gets miscompiled for ARM users
350 * (busybox.net/bugs/view.php?id=2274).
351 * printf(("\b\b\b\b" + 4) - num);
359 printf("\033[%uD", num);
363 /* Need to go one or more lines up */
366 unsigned w = cmdedit_termw; /* volatile var */
367 count_y = 1 + (num / w);
368 cmdedit_y -= count_y;
369 cmdedit_x = w * count_y - num;
371 /* go to 1st column; go up; go to correct column */
372 printf("\r" "\033[%dA" "\033[%dC", count_y, cmdedit_x);
375 static void put_prompt(void)
379 out1str(cmdedit_prompt);
382 w = cmdedit_termw; /* read volatile var once */
383 cmdedit_y = cmdedit_prmt_len / w; /* new quasireal y */
384 cmdedit_x = cmdedit_prmt_len % w;
387 /* draw prompt, editor line, and clear tail */
388 static void redraw(int y, int back_cursor)
390 if (y > 0) /* up to start y */
391 printf("\033[%uA", y);
394 input_end(); /* rewrite */
395 printf("\033[J"); /* erase after cursor */
396 input_backward(back_cursor);
399 /* Delete the char in front of the cursor, optionally saving it
400 * for later putback */
401 #if !ENABLE_FEATURE_EDITING_VI
402 static void input_delete(void)
403 #define input_delete(save) input_delete()
405 static void input_delete(int save)
410 if (j == (int)command_len)
413 #if ENABLE_FEATURE_EDITING_VI
419 if ((delptr - delbuf) < DELBUFSIZ)
420 *delptr++ = command_ps[j];
424 memmove(command_ps + j, command_ps + j + 1,
425 /* (command_len + 1 [because of NUL]) - (j + 1)
426 * simplified into (command_len - j) */
427 (command_len - j) * sizeof(command_ps[0]));
429 input_end(); /* rewrite new line */
430 cmdedit_set_out_char(' '); /* erase char */
431 input_backward(cursor - j); /* back to old pos cursor */
434 #if ENABLE_FEATURE_EDITING_VI
435 static void put(void)
438 int j = delptr - delbuf;
443 /* open hole and then fill it */
444 memmove(command_ps + cursor + j, command_ps + cursor,
445 (command_len - cursor + 1) * sizeof(command_ps[0]));
446 memcpy(command_ps + cursor, delbuf, j * sizeof(command_ps[0]));
448 input_end(); /* rewrite new line */
449 input_backward(cursor - ocursor - j + 1); /* at end of new text */
453 /* Delete the char in back of the cursor */
454 static void input_backspace(void)
462 /* Move forward one character */
463 static void input_forward(void)
465 if (cursor < command_len)
466 cmdedit_set_out_char(command_ps[cursor + 1]);
469 #if ENABLE_FEATURE_TAB_COMPLETION
471 static void free_tab_completion_data(void)
475 free(matches[--num_matches]);
481 static void add_match(char *matched)
483 matches = xrealloc_vector(matches, 4, num_matches);
484 matches[num_matches] = matched;
488 #if ENABLE_FEATURE_USERNAME_COMPLETION
489 static void username_tab_completion(char *ud, char *with_shash_flg)
491 struct passwd *entry;
494 ud++; /* ~user/... to user/... */
495 userlen = strlen(ud);
497 if (with_shash_flg) { /* "~/..." or "~user/..." */
498 char *sav_ud = ud - 1;
501 if (*ud == '/') { /* "~/..." */
506 temp = strchr(ud, '/');
507 *temp = '\0'; /* ~user\0 */
508 entry = getpwnam(ud);
509 *temp = '/'; /* restore ~user/... */
512 home = entry->pw_dir;
515 if ((userlen + strlen(home) + 1) < MAX_LINELEN) {
517 sprintf(sav_ud, "%s%s", home, ud);
522 /* Using _r function to avoid pulling in static buffers */
525 struct passwd *result;
528 while (!getpwent_r(&pwd, line_buff, sizeof(line_buff), &result)) {
529 /* Null usernames should result in all users as possible completions. */
530 if (/*!userlen || */ strncmp(ud, pwd.pw_name, userlen) == 0) {
531 add_match(xasprintf("~%s/", pwd.pw_name));
537 #endif /* FEATURE_COMMAND_USERNAME_COMPLETION */
545 static int path_parse(char ***p, int flags)
552 /* if not setenv PATH variable, to search cur dir "." */
553 if (flags != FIND_EXE_ONLY)
556 if (state->flags & WITH_PATH_LOOKUP)
557 pth = state->path_lookup;
559 pth = getenv("PATH");
560 /* PATH=<empty> or PATH=:<empty> */
561 if (!pth || !pth[0] || LONE_CHAR(pth, ':'))
565 npth = 1; /* path component count */
567 tmp = strchr(tmp, ':');
571 break; /* :<empty> */
575 res = xmalloc(npth * sizeof(char*));
576 res[0] = tmp = xstrdup(pth);
579 tmp = strchr(tmp, ':');
582 *tmp++ = '\0'; /* ':' -> '\0' */
584 break; /* :<empty> */
591 static void exe_n_cwd_tab_completion(char *command, int type)
597 char **paths = path1;
601 char *pfind = strrchr(command, '/');
602 /* char dirbuf[MAX_LINELEN]; */
603 #define dirbuf (S.exe_n_cwd_tab_completion__dirbuf)
606 path1[0] = (char*)".";
609 /* no dir, if flags==EXE_ONLY - get paths, else "." */
610 npaths = path_parse(&paths, type);
613 /* dirbuf = ".../.../.../" */
614 safe_strncpy(dirbuf, command, (pfind - command) + 2);
615 #if ENABLE_FEATURE_USERNAME_COMPLETION
616 if (dirbuf[0] == '~') /* ~/... or ~user/... */
617 username_tab_completion(dirbuf, dirbuf);
620 /* point to 'l' in "..../last_component" */
624 for (i = 0; i < npaths; i++) {
625 dir = opendir(paths[i]);
627 continue; /* don't print an error */
629 while ((next = readdir(dir)) != NULL) {
631 const char *str_found = next->d_name;
634 if (strncmp(str_found, pfind, strlen(pfind)))
636 /* not see .name without .match */
637 if (*str_found == '.' && *pfind == '\0') {
638 if (NOT_LONE_CHAR(paths[i], '/') || str_found[1])
640 str_found = ""; /* only "/" */
642 found = concat_path_file(paths[i], str_found);
643 /* hmm, remove in progress? */
644 /* NB: stat() first so that we see is it a directory;
645 * but if that fails, use lstat() so that
646 * we still match dangling links */
647 if (stat(found, &st) && lstat(found, &st))
649 /* find with dirs? */
650 if (paths[i] != dirbuf)
651 strcpy(found, next->d_name); /* only name */
653 len1 = strlen(found);
654 found = xrealloc(found, len1 + 2);
656 found[len1+1] = '\0';
658 if (S_ISDIR(st.st_mode)) {
659 /* name is a directory */
660 if (found[len1-1] != '/') {
664 /* not put found file if search only dirs for cd */
665 if (type == FIND_DIR_ONLY)
668 /* Add it to the list */
676 if (paths != path1) {
677 free(paths[0]); /* allocated memory is only in first member */
683 /* QUOT is used on elements of int_buf[], which are bytes,
684 * not Unicode chars. Therefore it works correctly even in Unicode mode.
686 #define QUOT (UCHAR_MAX+1)
688 #define int_buf (S.find_match__int_buf)
689 #define pos_buf (S.find_match__pos_buf)
690 /* is must be <= in */
691 static void collapse_pos(int is, int in)
693 memmove(int_buf+is, int_buf+in, (MAX_LINELEN+1-in)*sizeof(int_buf[0]));
694 memmove(pos_buf+is, pos_buf+in, (MAX_LINELEN+1-in)*sizeof(pos_buf[0]));
696 static NOINLINE int find_match(char *matchBuf, int *len_with_quotes)
701 /* Were local, but it uses too much stack */
702 /* int16_t int_buf[MAX_LINELEN + 1]; */
703 /* int16_t pos_buf[MAX_LINELEN + 1]; */
705 /* set to integer dimension characters and own positions */
707 int_buf[i] = (unsigned char)matchBuf[i];
708 if (int_buf[i] == 0) {
709 pos_buf[i] = -1; /* end-fo-line indicator */
715 /* mask \+symbol and convert '\t' to ' ' */
716 for (i = j = 0; matchBuf[i]; i++, j++)
717 if (matchBuf[i] == '\\') {
718 collapse_pos(j, j + 1);
721 #if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
722 if (matchBuf[i] == '\t') /* algorithm equivalent */
723 int_buf[j] = ' ' | QUOT;
726 #if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
727 else if (matchBuf[i] == '\t')
731 /* mask "symbols" or 'symbols' */
733 for (i = 0; int_buf[i]; i++) {
735 if (c == '\'' || c == '"') {
744 } else if (c2 != 0 && c != '$')
748 /* skip commands with arguments if line has commands delimiters */
749 /* ';' ';;' '&' '|' '&&' '||' but `>&' `<&' `>|' */
750 for (i = 0; int_buf[i]; i++) {
753 j = i ? int_buf[i - 1] : -1;
755 if (c == ';' || c == '&' || c == '|') {
756 command_mode = 1 + (c == c2);
758 if (j == '>' || j == '<')
760 } else if (c == '|' && j == '>')
764 collapse_pos(0, i + command_mode);
765 i = -1; /* hack incremet */
768 /* collapse `command...` */
769 for (i = 0; int_buf[i]; i++) {
770 if (int_buf[i] == '`') {
771 for (j = i + 1; int_buf[j]; j++)
772 if (int_buf[j] == '`') {
773 collapse_pos(i, j + 1);
778 /* not found closing ` - command mode, collapse all previous */
779 collapse_pos(0, i + 1);
782 i--; /* hack incremet */
786 /* collapse (command...(command...)...) or {command...{command...}...} */
787 c = 0; /* "recursive" level */
789 for (i = 0; int_buf[i]; i++) {
790 if (int_buf[i] == '(' || int_buf[i] == '{') {
791 if (int_buf[i] == '(')
795 collapse_pos(0, i + 1);
796 i = -1; /* hack incremet */
799 for (i = 0; pos_buf[i] >= 0 && (c > 0 || c2 > 0); i++) {
800 if ((int_buf[i] == ')' && c > 0) || (int_buf[i] == '}' && c2 > 0)) {
801 if (int_buf[i] == ')')
805 collapse_pos(0, i + 1);
806 i = -1; /* hack incremet */
810 /* skip first not quote space */
811 for (i = 0; int_buf[i]; i++)
812 if (int_buf[i] != ' ')
817 /* set find mode for completion */
818 command_mode = FIND_EXE_ONLY;
819 for (i = 0; int_buf[i]; i++) {
820 if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
821 if (int_buf[i] == ' ' && command_mode == FIND_EXE_ONLY
822 && matchBuf[pos_buf[0]] == 'c'
823 && matchBuf[pos_buf[1]] == 'd'
825 command_mode = FIND_DIR_ONLY;
827 command_mode = FIND_FILE_ONLY;
832 for (i = 0; int_buf[i]; i++)
835 for (--i; i >= 0; i--) {
837 if (c == ' ' || c == '<' || c == '>' || c == '|' || c == '&') {
838 collapse_pos(0, i + 1);
842 /* skip first not quoted '\'' or '"' */
843 for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++)
845 /* collapse quote or unquote // or /~ */
846 while ((int_buf[i] & ~QUOT) == '/'
847 && ((int_buf[i+1] & ~QUOT) == '/' || (int_buf[i+1] & ~QUOT) == '~')
852 /* set only match and destroy quotes */
854 for (c = 0; pos_buf[i] >= 0; i++) {
855 matchBuf[c++] = matchBuf[pos_buf[i]];
859 /* old length matchBuf with quotes symbols */
860 *len_with_quotes = j ? j - pos_buf[0] : 0;
868 * display by column (original idea from ls applet,
869 * very optimized by me :)
871 static void showfiles(void)
874 int column_width = 0;
875 int nfiles = num_matches;
879 /* find the longest file name - use that as the column width */
880 for (row = 0; row < nrows; row++) {
881 l = unicode_strlen(matches[row]);
882 if (column_width < l)
885 column_width += 2; /* min space for columns */
886 ncols = cmdedit_termw / column_width;
891 nrows++; /* round up fractionals */
895 for (row = 0; row < nrows; row++) {
899 for (nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++) {
900 printf("%s%-*s", matches[n],
901 (int)(column_width - unicode_strlen(matches[n])), ""
908 static char *add_quote_for_spec_chars(char *found)
911 char *s = xzalloc((strlen(found) + 1) * 2);
914 if (strchr(" `\"#$%^&*()=+{}[]:;'|\\<>", *found))
918 /* s[l] = '\0'; - already is */
922 /* Do TAB completion */
923 static void input_tab(smallint *lastWasTab)
925 if (!(state->flags & TAB_COMPLETION))
931 /* char matchBuf[MAX_LINELEN]; */
932 #define matchBuf (S.input_tab__matchBuf)
935 #if ENABLE_FEATURE_ASSUME_UNICODE
936 /* cursor pos in command converted to multibyte form */
940 *lastWasTab = TRUE; /* flop trigger */
942 /* Make a local copy of the string --
943 * up to the position of the cursor */
944 save_string(matchBuf, cursor + 1);
945 #if ENABLE_FEATURE_ASSUME_UNICODE
946 cursor_mb = strlen(matchBuf);
950 find_type = find_match(matchBuf, &recalc_pos);
952 /* Free up any memory already allocated */
953 free_tab_completion_data();
955 #if ENABLE_FEATURE_USERNAME_COMPLETION
956 /* If the word starts with `~' and there is no slash in the word,
957 * then try completing this word as a username. */
958 if (state->flags & USERNAME_COMPLETION)
959 if (matchBuf[0] == '~' && strchr(matchBuf, '/') == NULL)
960 username_tab_completion(matchBuf, NULL);
962 /* Try to match any executable in our path and everything
963 * in the current working directory */
965 exe_n_cwd_tab_completion(matchBuf, find_type);
966 /* Sort, then remove any duplicates found */
970 qsort_string_vector(matches, num_matches);
971 for (i = 0; i < num_matches - 1; ++i) {
972 if (matches[i] && matches[i+1]) { /* paranoia */
973 if (strcmp(matches[i], matches[i+1]) == 0) {
975 matches[i] = NULL; /* paranoia */
977 matches[n++] = matches[i];
981 matches[n] = matches[i];
984 /* Did we find exactly one match? */
985 if (!matches || num_matches > 1) { /* no */
988 return; /* not found */
989 /* find minimal match */
990 tmp1 = xstrdup(matches[0]);
991 for (tmp = tmp1; *tmp; tmp++) {
992 for (len_found = 1; len_found < num_matches; len_found++) {
993 if (matches[len_found][tmp - tmp1] != *tmp) {
999 if (*tmp1 == '\0') { /* have unique */
1003 tmp = add_quote_for_spec_chars(tmp1);
1005 } else { /* one match */
1006 tmp = add_quote_for_spec_chars(matches[0]);
1007 /* for next completion current found */
1008 *lastWasTab = FALSE;
1010 len_found = strlen(tmp);
1011 if (tmp[len_found-1] != '/') {
1012 tmp[len_found] = ' ';
1013 tmp[len_found+1] = '\0';
1017 len_found = strlen(tmp);
1018 #if !ENABLE_FEATURE_ASSUME_UNICODE
1019 /* have space to place the match? */
1020 /* The result consists of three parts with these lengths: */
1021 /* (cursor - recalc_pos) + len_found + (command_len - cursor) */
1022 /* it simplifies into: */
1023 if ((int)(len_found + command_len - recalc_pos) < S.maxsize) {
1025 strcpy(matchBuf, command_ps + cursor);
1026 /* add match and tail */
1027 sprintf(&command_ps[cursor - recalc_pos], "%s%s", tmp, matchBuf);
1028 command_len = strlen(command_ps);
1030 recalc_pos = cursor - recalc_pos + len_found;
1031 /* write out the matched command */
1032 redraw(cmdedit_y, command_len - recalc_pos);
1036 char command[MAX_LINELEN];
1037 int len = save_string(command, sizeof(command));
1038 /* have space to place the match? */
1039 /* (cursor_mb - recalc_pos) + len_found + (len - cursor_mb) */
1040 if ((int)(len_found + len - recalc_pos) < MAX_LINELEN) {
1042 strcpy(matchBuf, command + cursor_mb);
1043 /* where do we want to have cursor after all? */
1044 strcpy(&command[cursor_mb - recalc_pos], tmp);
1045 len = load_string(command, S.maxsize);
1046 /* add match and tail */
1047 sprintf(&command[cursor_mb - recalc_pos], "%s%s", tmp, matchBuf);
1048 command_len = load_string(command, S.maxsize);
1049 /* write out the matched command */
1050 redraw(cmdedit_y, command_len - len);
1057 /* Ok -- the last char was a TAB. Since they
1058 * just hit TAB again, print a list of all the
1059 * available choices... */
1060 if (matches && num_matches > 0) {
1061 /* changed by goto_new_line() */
1062 int sav_cursor = cursor;
1064 /* Go to the next line */
1067 redraw(0, command_len - sav_cursor);
1072 #endif /* FEATURE_COMMAND_TAB_COMPLETION */
1075 line_input_t* FAST_FUNC new_line_input_t(int flags)
1077 line_input_t *n = xzalloc(sizeof(*n));
1085 static void save_command_ps_at_cur_history(void)
1087 if (command_ps[0] != BB_NUL) {
1088 int cur = state->cur_history;
1089 free(state->history[cur]);
1091 # if ENABLE_FEATURE_ASSUME_UNICODE
1093 char tbuf[MAX_LINELEN];
1094 save_string(tbuf, sizeof(tbuf));
1095 state->history[cur] = xstrdup(tbuf);
1098 state->history[cur] = xstrdup(command_ps);
1103 /* state->flags is already checked to be nonzero */
1104 static int get_previous_history(void)
1106 if ((state->flags & DO_HISTORY) && state->cur_history) {
1107 save_command_ps_at_cur_history();
1108 state->cur_history--;
1115 static int get_next_history(void)
1117 if (state->flags & DO_HISTORY) {
1118 if (state->cur_history < state->cnt_history) {
1119 save_command_ps_at_cur_history(); /* save the current history line */
1120 return ++state->cur_history;
1127 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
1128 /* We try to ensure that concurrent additions to the history
1129 * do not overwrite each other.
1130 * Otherwise shell users get unhappy.
1132 * History file is trimmed lazily, when it grows several times longer
1133 * than configured MAX_HISTORY lines.
1136 static void free_line_input_t(line_input_t *n)
1138 int i = n->cnt_history;
1140 free(n->history[--i]);
1144 /* state->flags is already checked to be nonzero */
1145 static void load_history(line_input_t *st_parm)
1147 char *temp_h[MAX_HISTORY];
1150 unsigned idx, i, line_len;
1152 /* NB: do not trash old history if file can't be opened */
1154 fp = fopen_for_read(st_parm->hist_file);
1156 /* clean up old history */
1157 for (idx = st_parm->cnt_history; idx > 0;) {
1159 free(st_parm->history[idx]);
1160 st_parm->history[idx] = NULL;
1163 /* fill temp_h[], retaining only last MAX_HISTORY lines */
1164 memset(temp_h, 0, sizeof(temp_h));
1165 st_parm->cnt_history_in_file = idx = 0;
1166 while ((line = xmalloc_fgetline(fp)) != NULL) {
1167 if (line[0] == '\0') {
1173 st_parm->cnt_history_in_file++;
1175 if (idx == MAX_HISTORY)
1180 /* find first non-NULL temp_h[], if any */
1181 if (st_parm->cnt_history_in_file) {
1182 while (temp_h[idx] == NULL) {
1184 if (idx == MAX_HISTORY)
1189 /* copy temp_h[] to st_parm->history[] */
1190 for (i = 0; i < MAX_HISTORY;) {
1195 if (idx == MAX_HISTORY)
1197 line_len = strlen(line);
1198 if (line_len >= MAX_LINELEN)
1199 line[MAX_LINELEN-1] = '\0';
1200 st_parm->history[i++] = line;
1202 st_parm->cnt_history = i;
1206 /* state->flags is already checked to be nonzero */
1207 static void save_history(char *str)
1212 fd = open(state->hist_file, O_WRONLY | O_CREAT | O_APPEND, 0666);
1215 xlseek(fd, 0, SEEK_END); /* paranoia */
1217 str[len] = '\n'; /* we (try to) do atomic write */
1218 len2 = full_write(fd, str, len + 1);
1221 if (len2 != len + 1)
1222 return; /* "wtf?" */
1224 /* did we write so much that history file needs trimming? */
1225 state->cnt_history_in_file++;
1226 if (state->cnt_history_in_file > MAX_HISTORY * 4) {
1229 line_input_t *st_temp;
1232 /* we may have concurrently written entries from others.
1234 st_temp = new_line_input_t(state->flags);
1235 st_temp->hist_file = state->hist_file;
1236 load_history(st_temp);
1238 /* write out temp file and replace hist_file atomically */
1239 new_name = xasprintf("%s.%u.new", state->hist_file, (int) getpid());
1240 fp = fopen_for_write(new_name);
1242 for (i = 0; i < st_temp->cnt_history; i++)
1243 fprintf(fp, "%s\n", st_temp->history[i]);
1245 if (rename(new_name, state->hist_file) == 0)
1246 state->cnt_history_in_file = st_temp->cnt_history;
1249 free_line_input_t(st_temp);
1253 # define load_history(a) ((void)0)
1254 # define save_history(a) ((void)0)
1255 # endif /* FEATURE_COMMAND_SAVEHISTORY */
1257 static void remember_in_history(char *str)
1261 if (!(state->flags & DO_HISTORY))
1265 i = state->cnt_history;
1266 /* Don't save dupes */
1267 if (i && strcmp(state->history[i-1], str) == 0)
1270 free(state->history[MAX_HISTORY]); /* redundant, paranoia */
1271 state->history[MAX_HISTORY] = NULL; /* redundant, paranoia */
1273 /* If history[] is full, remove the oldest command */
1274 /* we need to keep history[MAX_HISTORY] empty, hence >=, not > */
1275 if (i >= MAX_HISTORY) {
1276 free(state->history[0]);
1277 for (i = 0; i < MAX_HISTORY-1; i++)
1278 state->history[i] = state->history[i+1];
1279 /* i == MAX_HISTORY-1 */
1281 /* i <= MAX_HISTORY-1 */
1282 state->history[i++] = xstrdup(str);
1283 /* i <= MAX_HISTORY */
1284 state->cur_history = i;
1285 state->cnt_history = i;
1286 # if MAX_HISTORY > 0 && ENABLE_FEATURE_EDITING_SAVEHISTORY
1287 if ((state->flags & SAVE_HISTORY) && state->hist_file)
1290 IF_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines++;)
1293 #else /* MAX_HISTORY == 0 */
1294 # define remember_in_history(a) ((void)0)
1295 #endif /* MAX_HISTORY */
1298 #if ENABLE_FEATURE_EDITING_VI
1300 * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
1303 vi_Word_motion(int eat)
1305 CHAR_T *command = command_ps;
1307 while (cursor < command_len && !BB_isspace(command[cursor]))
1309 if (eat) while (cursor < command_len && BB_isspace(command[cursor]))
1314 vi_word_motion(int eat)
1316 CHAR_T *command = command_ps;
1318 if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
1319 while (cursor < command_len
1320 && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
1324 } else if (BB_ispunct(command[cursor])) {
1325 while (cursor < command_len && BB_ispunct(command[cursor+1]))
1329 if (cursor < command_len)
1333 while (cursor < command_len && BB_isspace(command[cursor]))
1341 CHAR_T *command = command_ps;
1344 while (cursor < command_len && BB_isspace(command[cursor]))
1346 while (cursor < command_len-1 && !BB_isspace(command[cursor+1]))
1353 CHAR_T *command = command_ps;
1355 if (cursor >= command_len-1)
1358 while (cursor < command_len-1 && BB_isspace(command[cursor]))
1360 if (cursor >= command_len-1)
1362 if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
1363 while (cursor < command_len-1
1364 && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
1368 } else if (BB_ispunct(command[cursor])) {
1369 while (cursor < command_len-1 && BB_ispunct(command[cursor+1]))
1375 vi_Back_motion(void)
1377 CHAR_T *command = command_ps;
1379 while (cursor > 0 && BB_isspace(command[cursor-1]))
1381 while (cursor > 0 && !BB_isspace(command[cursor-1]))
1386 vi_back_motion(void)
1388 CHAR_T *command = command_ps;
1393 while (cursor > 0 && BB_isspace(command[cursor]))
1397 if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
1399 && (BB_isalnum(command[cursor-1]) || command[cursor-1] == '_')
1403 } else if (BB_ispunct(command[cursor])) {
1404 while (cursor > 0 && BB_ispunct(command[cursor-1]))
1410 /* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
1411 static void ctrl_left(void)
1413 CHAR_T *command = command_ps;
1421 c = command[cursor];
1422 if (c != ' ' && !BB_ispunct(c)) {
1423 /* we reached a "word" delimited by spaces/punct.
1424 * go to its beginning */
1426 c = command[cursor - 1];
1427 if (c == ' ' || BB_ispunct(c))
1437 static void ctrl_right(void)
1439 CHAR_T *command = command_ps;
1444 c = command[cursor];
1447 if (c != ' ' && !BB_ispunct(c)) {
1448 /* we reached a "word" delimited by spaces/punct.
1449 * go to its end + 1 */
1452 c = command[cursor];
1453 if (c == BB_NUL || c == ' ' || BB_ispunct(c))
1464 * read_line_input and its helpers
1467 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
1468 static void ask_terminal(void)
1470 /* Ask terminal where is the cursor now.
1471 * lineedit_read_key handles response and corrects
1472 * our idea of current cursor position.
1473 * Testcase: run "echo -n long_line_long_line_long_line",
1474 * then type in a long, wrapping command and try to
1475 * delete it using backspace key.
1476 * Note: we print it _after_ prompt, because
1477 * prompt may contain CR. Example: PS1='\[\r\n\]\w '
1479 /* Problem: if there is buffered input on stdin,
1480 * the response will be delivered later,
1481 * possibly to an unsuspecting application.
1482 * Testcase: "sleep 1; busybox ash" + press and hold [Enter].
1484 * ~/srcdevel/bbox/fix/busybox.t4 #
1485 * ~/srcdevel/bbox/fix/busybox.t4 #
1486 * ^[[59;34~/srcdevel/bbox/fix/busybox.t4 # <-- garbage
1487 * ~/srcdevel/bbox/fix/busybox.t4 #
1489 * Checking for input with poll only makes the race narrower,
1490 * I still can trigger it. Strace:
1492 * write(1, "~/srcdevel/bbox/fix/busybox.t4 # ", 33) = 33
1493 * poll([{fd=0, events=POLLIN}], 1, 0) = 0 (Timeout) <-- no input exists
1494 * write(1, "\33[6n", 4) = 4 <-- send the ESC sequence, quick!
1495 * poll([{fd=0, events=POLLIN}], 1, 4294967295) = 1 ([{fd=0, revents=POLLIN}])
1496 * read(0, "\n", 1) = 1 <-- oh crap, user's input got in first
1500 pfd.fd = STDIN_FILENO;
1501 pfd.events = POLLIN;
1502 if (safe_poll(&pfd, 1, 0) == 0) {
1503 S.sent_ESC_br6n = 1;
1504 out1str("\033" "[6n");
1505 fflush_all(); /* make terminal see it ASAP! */
1509 #define ask_terminal() ((void)0)
1512 #if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
1513 static void parse_and_put_prompt(const char *prmt_ptr)
1515 cmdedit_prompt = prmt_ptr;
1516 cmdedit_prmt_len = strlen(prmt_ptr);
1520 static void parse_and_put_prompt(const char *prmt_ptr)
1523 size_t cur_prmt_len = 0;
1524 char flg_not_length = '[';
1525 char *prmt_mem_ptr = xzalloc(1);
1526 char *cwd_buf = xrealloc_getcwd_or_warn(NULL);
1531 cmdedit_prmt_len = 0;
1534 cwd_buf = (char *)bb_msg_unknown;
1537 cbuf[1] = '\0'; /* never changes */
1540 char *free_me = NULL;
1545 const char *cp = prmt_ptr;
1548 c = bb_process_escape_sequence(&prmt_ptr);
1549 if (prmt_ptr == cp) {
1555 # if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
1557 pbuf = user_buf ? user_buf : (char*)"";
1561 pbuf = free_me = safe_gethostname();
1562 *strchrnul(pbuf, '.') = '\0';
1565 c = (geteuid() == 0 ? '#' : '$');
1567 # if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
1569 /* /home/user[/something] -> ~[/something] */
1571 l = strlen(home_pwd_buf);
1573 && strncmp(home_pwd_buf, cwd_buf, l) == 0
1574 && (cwd_buf[l]=='/' || cwd_buf[l]=='\0')
1575 && strlen(cwd_buf + l) < PATH_MAX
1577 pbuf = free_me = xasprintf("~%s", cwd_buf + l);
1583 cp = strrchr(pbuf, '/');
1584 if (cp != NULL && cp != pbuf)
1585 pbuf += (cp-pbuf) + 1;
1588 pbuf = free_me = xasprintf("%d", num_ok_lines);
1590 case 'e': case 'E': /* \e \E = \033 */
1593 case 'x': case 'X': {
1595 for (l = 0; l < 3;) {
1597 buf2[l++] = *prmt_ptr;
1599 h = strtoul(buf2, &pbuf, 16);
1600 if (h > UCHAR_MAX || (pbuf - buf2) < l) {
1606 c = (char)strtoul(buf2, NULL, 16);
1613 if (c == flg_not_length) {
1614 flg_not_length = (flg_not_length == '[' ? ']' : '[');
1622 cur_prmt_len = strlen(pbuf);
1623 prmt_len += cur_prmt_len;
1624 if (flg_not_length != ']')
1625 cmdedit_prmt_len += cur_prmt_len;
1626 prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_len+1), pbuf);
1630 if (cwd_buf != (char *)bb_msg_unknown)
1632 cmdedit_prompt = prmt_mem_ptr;
1637 static void cmdedit_setwidth(unsigned w, int redraw_flg)
1641 /* new y for current cursor */
1642 int new_y = (cursor + cmdedit_prmt_len) / w;
1644 redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
1649 static void win_changed(int nsig)
1652 get_terminal_width_height(0, &width, NULL);
1653 cmdedit_setwidth(width, nsig /* - just a yes/no flag */);
1654 if (nsig == SIGWINCH)
1655 signal(SIGWINCH, win_changed); /* rearm ourself */
1658 static int lineedit_read_key(char *read_key_buffer)
1662 #if ENABLE_FEATURE_ASSUME_UNICODE
1663 char unicode_buf[MB_CUR_MAX + 1];
1664 int unicode_idx = 0;
1668 /* Wait for input. TIMEOUT = -1 makes read_key wait even
1669 * on nonblocking stdin, TIMEOUT = 50 makes sure we won't
1670 * insist on full MB_CUR_MAX buffer to declare input like
1671 * "\xff\n",pause,"ls\n" invalid and thus won't lose "ls".
1673 * Note: read_key sets errno to 0 on success.
1675 ic = read_key(STDIN_FILENO, read_key_buffer, timeout);
1677 #if ENABLE_FEATURE_ASSUME_UNICODE
1678 if (errno == EAGAIN && unicode_idx != 0)
1684 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
1685 if ((int32_t)ic == KEYCODE_CURSOR_POS
1688 S.sent_ESC_br6n = 0;
1689 if (cursor == 0) { /* otherwise it may be bogus */
1690 int col = ((ic >> 32) & 0x7fff) - 1;
1691 if (col > cmdedit_prmt_len) {
1692 cmdedit_x += (col - cmdedit_prmt_len);
1693 while (cmdedit_x >= cmdedit_termw) {
1694 cmdedit_x -= cmdedit_termw;
1703 #if ENABLE_FEATURE_ASSUME_UNICODE
1704 if (unicode_status == UNICODE_ON) {
1707 if ((int32_t)ic < 0) /* KEYCODE_xxx */
1709 // TODO: imagine sequence like: 0xff,<left-arrow>: we are currently losing 0xff...
1711 unicode_buf[unicode_idx++] = ic;
1712 unicode_buf[unicode_idx] = '\0';
1713 if (mbstowcs(&wc, unicode_buf, 1) != 1) {
1714 /* Not (yet?) a valid unicode char */
1715 if (unicode_idx < MB_CUR_MAX) {
1720 /* Invalid sequence. Save all "bad bytes" except first */
1721 read_key_ungets(read_key_buffer, unicode_buf + 1, unicode_idx - 1);
1723 * ic = unicode_buf[0] sounds even better, but currently
1724 * this does not work: wchar_t[] -> char[] conversion
1725 * when lineedit finishes mangles such "raw bytes"
1726 * (by misinterpreting them as unicode chars):
1728 ic = CONFIG_SUBST_WCHAR;
1730 /* Valid unicode char, return its code */
1741 #if ENABLE_UNICODE_BIDI_SUPPORT
1742 static int isrtl_str(void)
1745 while (command_ps[idx] >= ' ' && command_ps[idx] < 127 && !isalpha(command_ps[idx]))
1747 return unicode_isrtl(command_ps[idx]);
1750 # define isrtl_str() 0
1753 /* leave out the "vi-mode"-only case labels if vi editing isn't
1755 #define vi_case(caselabel) IF_FEATURE_EDITING_VI(case caselabel)
1757 /* convert uppercase ascii to equivalent control char, for readability */
1759 #define CTRL(a) ((a) & ~0x40)
1761 /* maxsize must be >= 2.
1763 * -1 on read errors or EOF, or on bare Ctrl-D,
1764 * 0 on ctrl-C (the line entered is still returned in 'command'),
1765 * >0 length of input string, including terminating '\n'
1767 int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, line_input_t *st)
1770 #if ENABLE_FEATURE_TAB_COMPLETION
1771 smallint lastWasTab = FALSE;
1773 smallint break_out = 0;
1774 #if ENABLE_FEATURE_EDITING_VI
1775 smallint vi_cmdmode = 0;
1777 struct termios initial_settings;
1778 struct termios new_settings;
1779 char read_key_buffer[KEYCODE_BUFFER_SIZE];
1783 if (tcgetattr(STDIN_FILENO, &initial_settings) < 0
1784 || !(initial_settings.c_lflag & ECHO)
1786 /* Happens when e.g. stty -echo was run before */
1787 parse_and_put_prompt(prompt);
1788 /* fflush_all(); - done by parse_and_put_prompt */
1789 if (fgets(command, maxsize, stdin) == NULL)
1790 len = -1; /* EOF or error */
1792 len = strlen(command);
1799 // FIXME: audit & improve this
1800 if (maxsize > MAX_LINELEN)
1801 maxsize = MAX_LINELEN;
1802 S.maxsize = maxsize;
1804 /* With null flags, no other fields are ever used */
1805 state = st ? st : (line_input_t*) &const_int_0;
1807 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
1808 if ((state->flags & SAVE_HISTORY) && state->hist_file)
1809 if (state->cnt_history == 0)
1810 load_history(state);
1812 if (state->flags & DO_HISTORY)
1813 state->cur_history = state->cnt_history;
1816 /* prepare before init handlers */
1817 cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
1819 #if ENABLE_FEATURE_ASSUME_UNICODE
1820 command_ps = xzalloc(maxsize * sizeof(command_ps[0]));
1822 command_ps = command;
1825 #define command command_must_not_be_used
1827 new_settings = initial_settings;
1828 new_settings.c_lflag &= ~ICANON; /* unbuffered input */
1829 /* Turn off echoing and CTRL-C, so we can trap it */
1830 new_settings.c_lflag &= ~(ECHO | ECHONL | ISIG);
1831 /* Hmm, in linux c_cc[] is not parsed if ICANON is off */
1832 new_settings.c_cc[VMIN] = 1;
1833 new_settings.c_cc[VTIME] = 0;
1834 /* Turn off CTRL-C, so we can trap it */
1835 #ifndef _POSIX_VDISABLE
1836 # define _POSIX_VDISABLE '\0'
1838 new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
1839 tcsetattr_stdin_TCSANOW(&new_settings);
1841 /* Now initialize things */
1842 previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
1843 win_changed(0); /* do initial resizing */
1844 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
1846 struct passwd *entry;
1848 entry = getpwuid(geteuid());
1850 user_buf = xstrdup(entry->pw_name);
1851 home_pwd_buf = xstrdup(entry->pw_dir);
1857 for (i = 0; i <= MAX_HISTORY; i++)
1858 bb_error_msg("history[%d]:'%s'", i, state->history[i]);
1859 bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
1862 /* Print out the command prompt, optionally ask where cursor is */
1863 parse_and_put_prompt(prompt);
1866 read_key_buffer[0] = 0;
1869 * The emacs and vi modes share much of the code in the big
1870 * command loop. Commands entered when in vi's command mode
1871 * (aka "escape mode") get an extra bit added to distinguish
1872 * them - this keeps them from being self-inserted. This
1873 * clutters the big switch a bit, but keeps all the code
1877 VI_CMDMODE_BIT = 0x40000000,
1878 /* 0x80000000 bit flags KEYCODE_xxx */
1883 ic = ic_raw = lineedit_read_key(read_key_buffer);
1885 #if ENABLE_FEATURE_EDITING_VI
1888 /* btw, since KEYCODE_xxx are all < 0, this doesn't
1889 * change ic if it contains one of them: */
1890 ic |= VI_CMDMODE_BIT;
1897 vi_case('\n'|VI_CMDMODE_BIT:)
1898 vi_case('\r'|VI_CMDMODE_BIT:)
1904 vi_case('0'|VI_CMDMODE_BIT:)
1905 /* Control-a -- Beginning of line */
1906 input_backward(cursor);
1909 vi_case('h'|VI_CMDMODE_BIT:)
1910 vi_case('\b'|VI_CMDMODE_BIT:) /* ^H */
1911 vi_case('\x7f'|VI_CMDMODE_BIT:) /* DEL */
1912 input_backward(1); /* Move back one character */
1915 vi_case('$'|VI_CMDMODE_BIT:)
1916 /* Control-e -- End of line */
1920 vi_case('l'|VI_CMDMODE_BIT:)
1921 vi_case(' '|VI_CMDMODE_BIT:)
1922 input_forward(); /* Move forward one character */
1925 case '\x7f': /* DEL */
1931 case KEYCODE_DELETE:
1937 #if ENABLE_FEATURE_TAB_COMPLETION
1939 input_tab(&lastWasTab);
1943 /* Control-k -- clear to end of line */
1944 command_ps[cursor] = BB_NUL;
1945 command_len = cursor;
1949 vi_case(CTRL('L')|VI_CMDMODE_BIT:)
1950 /* Control-l -- clear screen */
1952 redraw(0, command_len - cursor);
1956 vi_case(CTRL('N')|VI_CMDMODE_BIT:)
1957 vi_case('j'|VI_CMDMODE_BIT:)
1958 /* Control-n -- Get next command in history */
1959 if (get_next_history())
1963 vi_case(CTRL('P')|VI_CMDMODE_BIT:)
1964 vi_case('k'|VI_CMDMODE_BIT:)
1965 /* Control-p -- Get previous command from history */
1966 if (get_previous_history())
1971 vi_case(CTRL('U')|VI_CMDMODE_BIT:)
1972 /* Control-U -- Clear line before cursor */
1974 command_len -= cursor;
1975 memmove(command_ps, command_ps + cursor,
1976 (command_len + 1) * sizeof(command_ps[0]));
1977 redraw(cmdedit_y, command_len);
1981 vi_case(CTRL('W')|VI_CMDMODE_BIT:)
1982 /* Control-W -- Remove the last word */
1983 while (cursor > 0 && BB_isspace(command_ps[cursor-1]))
1985 while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
1989 #if ENABLE_FEATURE_EDITING_VI
1990 case 'i'|VI_CMDMODE_BIT:
1993 case 'I'|VI_CMDMODE_BIT:
1994 input_backward(cursor);
1997 case 'a'|VI_CMDMODE_BIT:
2001 case 'A'|VI_CMDMODE_BIT:
2005 case 'x'|VI_CMDMODE_BIT:
2008 case 'X'|VI_CMDMODE_BIT:
2014 case 'W'|VI_CMDMODE_BIT:
2017 case 'w'|VI_CMDMODE_BIT:
2020 case 'E'|VI_CMDMODE_BIT:
2023 case 'e'|VI_CMDMODE_BIT:
2026 case 'B'|VI_CMDMODE_BIT:
2029 case 'b'|VI_CMDMODE_BIT:
2032 case 'C'|VI_CMDMODE_BIT:
2035 case 'D'|VI_CMDMODE_BIT:
2038 case 'c'|VI_CMDMODE_BIT:
2041 case 'd'|VI_CMDMODE_BIT: {
2044 ic = lineedit_read_key(read_key_buffer);
2045 if (errno) /* error */
2046 goto prepare_to_die;
2047 if (ic == ic_raw) { /* "cc", "dd" */
2048 input_backward(cursor);
2060 case 'w': /* "dw", "cw" */
2061 vi_word_motion(vi_cmdmode);
2063 case 'W': /* 'dW', 'cW' */
2064 vi_Word_motion(vi_cmdmode);
2066 case 'e': /* 'de', 'ce' */
2070 case 'E': /* 'dE', 'cE' */
2076 input_backward(cursor - sc);
2077 while (nc-- > cursor)
2080 case 'b': /* "db", "cb" */
2081 case 'B': /* implemented as B */
2086 while (sc-- > cursor)
2089 case ' ': /* "d ", "c " */
2092 case '$': /* "d$", "c$" */
2094 while (cursor < command_len)
2100 case 'p'|VI_CMDMODE_BIT:
2103 case 'P'|VI_CMDMODE_BIT:
2106 case 'r'|VI_CMDMODE_BIT:
2107 //FIXME: unicode case?
2108 ic = lineedit_read_key(read_key_buffer);
2109 if (errno) /* error */
2110 goto prepare_to_die;
2111 if (ic < ' ' || ic > 255) {
2114 command_ps[cursor] = ic;
2119 case '\x1b': /* ESC */
2120 if (state->flags & VI_MODE) {
2121 /* insert mode --> command mode */
2126 #endif /* FEATURE_COMMAND_EDITING_VI */
2130 if (get_previous_history())
2135 if (!get_next_history())
2138 /* Rewrite the line with the selected history item */
2139 /* change command */
2140 command_len = load_string(state->history[state->cur_history] ?
2141 state->history[state->cur_history] : "", maxsize);
2142 /* redraw and go to eol (bol, in vi) */
2143 redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
2152 case KEYCODE_CTRL_LEFT:
2155 case KEYCODE_CTRL_RIGHT:
2159 input_backward(cursor);
2166 if (initial_settings.c_cc[VINTR] != 0
2167 && ic_raw == initial_settings.c_cc[VINTR]
2169 /* Ctrl-C (usually) - stop gathering input */
2172 break_out = -1; /* "do not append '\n'" */
2175 if (initial_settings.c_cc[VEOF] != 0
2176 && ic_raw == initial_settings.c_cc[VEOF]
2178 /* Ctrl-D (usually) - delete one character,
2179 * or exit if len=0 and no chars to delete */
2180 if (command_len == 0) {
2182 #if ENABLE_FEATURE_EDITING_VI
2185 break_out = command_len = -1;
2191 // /* Control-V -- force insert of next char */
2192 // if (c == CTRL('V')) {
2193 // if (safe_read(STDIN_FILENO, &c, 1) < 1)
2194 // goto prepare_to_die;
2201 || (!ENABLE_FEATURE_ASSUME_UNICODE && ic >= 256)
2202 || (ENABLE_FEATURE_ASSUME_UNICODE && ic >= VI_CMDMODE_BIT)
2204 /* If VI_CMDMODE_BIT is set, ic is >= 256
2205 * and vi mode ignores unexpected chars.
2206 * Otherwise, we are here if ic is a
2207 * control char or an unhandled ESC sequence,
2208 * which is also ignored.
2212 if ((int)command_len >= (maxsize - 2)) {
2213 /* Not enough space for the char and EOL */
2218 if (cursor == (command_len - 1)) {
2219 /* We are at the end, append */
2220 command_ps[cursor] = ic;
2221 command_ps[cursor + 1] = BB_NUL;
2222 cmdedit_set_out_char(' ');
2223 if (unicode_isrtl(ic))
2226 /* In the middle, insert */
2227 /* is char right-to-left, or "neutral" one (e.g. comma) added to rtl text? */
2228 int rtl = ENABLE_UNICODE_BIDI_SUPPORT ? (unicode_isrtl(ic) || (ic < 127 && !isalpha(ic) && isrtl_str())) : 0;
2231 memmove(command_ps + sc + 1, command_ps + sc,
2232 (command_len - sc) * sizeof(command_ps[0]));
2233 command_ps[sc] = ic;
2236 /* rewrite from cursor */
2238 /* to prev x pos + 1 */
2239 input_backward(cursor - sc);
2247 #if ENABLE_FEATURE_TAB_COMPLETION
2253 #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
2254 if (S.sent_ESC_br6n) {
2255 /* "sleep 1; busybox ash" + hold [Enter] to trigger.
2256 * We sent "ESC [ 6 n", but got '\n' first, and
2257 * KEYCODE_CURSOR_POS response is now buffered from terminal.
2258 * It's bad already and not much can be done with it
2259 * (it _will_ be visible for the next process to read stdin),
2260 * but without this delay it even shows up on the screen
2261 * as garbage because we restore echo settings with tcsetattr
2262 * before it comes in. UGLY!
2268 /* Stop bug catching using "command_must_not_be_used" trick */
2271 #if ENABLE_FEATURE_ASSUME_UNICODE
2273 if (command_len > 0)
2274 command_len = save_string(command, maxsize - 1);
2278 if (command_len > 0)
2279 remember_in_history(command);
2281 if (break_out > 0) {
2282 command[command_len++] = '\n';
2283 command[command_len] = '\0';
2286 #if ENABLE_FEATURE_TAB_COMPLETION
2287 free_tab_completion_data();
2290 /* restore initial_settings */
2291 tcsetattr_stdin_TCSANOW(&initial_settings);
2292 /* restore SIGWINCH handler */
2293 signal(SIGWINCH, previous_SIGWINCH_handler);
2299 return len; /* can't return command_len, DEINIT_S() destroys it */
2304 #undef read_line_input
2305 int FAST_FUNC read_line_input(const char* prompt, char* command, int maxsize)
2307 fputs(prompt, stdout);
2309 fgets(command, maxsize, stdin);
2310 return strlen(command);
2313 #endif /* FEATURE_EDITING */
2324 const char *applet_name = "debug stuff usage";
2326 int main(int argc, char **argv)
2328 char buff[MAX_LINELEN];
2330 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
2331 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
2332 "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
2333 "\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
2338 #if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
2339 setlocale(LC_ALL, "");
2343 l = read_line_input(prompt, buff);
2344 if (l <= 0 || buff[l-1] != '\n')
2347 printf("*** read_line_input() returned line =%s=\n", buff);
2349 printf("*** read_line_input() detect ^D\n");