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, and more will probably
20 * need to be added. 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 * lineedit does not know that the terminal escape sequences do not
26 * take up space on the screen. The redisplay code assumes, unless
27 * told otherwise, that each character in the prompt is a printable
28 * character that takes up one character position on the screen.
29 * You need to tell lineedit that some sequences of characters
30 * in the prompt take up no screen space. Compatibly with readline,
31 * use the \[ escape to begin a sequence of non-printing characters,
32 * and the \] escape to signal the end of such a sequence. Example:
34 * PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
39 /* FIXME: obsolete CONFIG item? */
40 #define ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT 0
43 # define ENABLE_FEATURE_EDITING 0
44 # define ENABLE_FEATURE_TAB_COMPLETION 0
45 # define ENABLE_FEATURE_USERNAME_COMPLETION 0
46 # define ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT 0
50 /* Entire file (except TESTing part) sits inside this #if */
51 #if ENABLE_FEATURE_EDITING
54 #define ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR \
55 (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
56 #define IF_FEATURE_GETUSERNAME_AND_HOMEDIR(...)
57 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
58 #undef IF_FEATURE_GETUSERNAME_AND_HOMEDIR
59 #define IF_FEATURE_GETUSERNAME_AND_HOMEDIR(...) __VA_ARGS__
64 #if ENABLE_FEATURE_ASSUME_UNICODE
66 # define CHAR_T wchar_t
67 # define BB_isspace(c) iswspace(c)
68 # define BB_isalnum(c) iswalnum(c)
69 # define BB_ispunct(c) iswpunct(c)
70 # define BB_isprint(c) iswprint(c)
71 /* this catches bugs */
76 # define isspace isspace_must_not_be_used
77 # define isalnum isalnum_must_not_be_used
78 # define ispunct ispunct_must_not_be_used
79 # define isprint isprint_must_not_be_used
83 # define BB_isspace(c) isspace(c)
84 # define BB_isalnum(c) isalnum(c)
85 # define BB_ispunct(c) ispunct(c)
86 # if ENABLE_LOCALE_SUPPORT
87 # define BB_isprint(c) isprint(c)
89 # define BB_isprint(c) ((c) >= ' ' && (c) != ((unsigned char)'\233'))
95 /* We use int16_t for positions, need to limit line len */
96 MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0
97 ? CONFIG_FEATURE_EDITING_MAX_LEN
101 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
102 static const char null_str[] ALIGN1 = "";
105 /* We try to minimize both static and stack usage. */
106 struct lineedit_statics {
109 volatile unsigned cmdedit_termw; /* = 80; */ /* actual terminal width */
110 sighandler_t previous_SIGWINCH_handler;
112 unsigned cmdedit_x; /* real x (col) terminal position */
113 unsigned cmdedit_y; /* pseudoreal y (row) terminal position */
114 unsigned cmdedit_prmt_len; /* length of prompt (without colors etc) */
117 unsigned command_len;
118 /* *int* maxsize: we want x in "if (x > S.maxsize)"
119 * to _not_ be promoted to unsigned */
123 const char *cmdedit_prompt;
124 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
125 int num_ok_lines; /* = 1; */
128 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
130 char *home_pwd_buf; /* = (char*)null_str; */
133 #if ENABLE_FEATURE_TAB_COMPLETION
135 unsigned num_matches;
138 #if ENABLE_FEATURE_EDITING_VI
139 #define DELBUFSIZ 128
141 smallint newdelflag; /* whether delbuf should be reused yet */
142 CHAR_T delbuf[DELBUFSIZ]; /* a place to store deleted characters */
145 /* Formerly these were big buffers on stack: */
146 #if ENABLE_FEATURE_TAB_COMPLETION
147 char exe_n_cwd_tab_completion__dirbuf[MAX_LINELEN];
148 char input_tab__matchBuf[MAX_LINELEN];
149 int16_t find_match__int_buf[MAX_LINELEN + 1]; /* need to have 9 bits at least */
150 int16_t find_match__pos_buf[MAX_LINELEN + 1];
154 /* See lineedit_ptr_hack.c */
155 extern struct lineedit_statics *const lineedit_ptr_to_statics;
157 #define S (*lineedit_ptr_to_statics)
158 #define state (S.state )
159 #define cmdedit_termw (S.cmdedit_termw )
160 #define previous_SIGWINCH_handler (S.previous_SIGWINCH_handler)
161 #define cmdedit_x (S.cmdedit_x )
162 #define cmdedit_y (S.cmdedit_y )
163 #define cmdedit_prmt_len (S.cmdedit_prmt_len)
164 #define cursor (S.cursor )
165 #define command_len (S.command_len )
166 #define command_ps (S.command_ps )
167 #define cmdedit_prompt (S.cmdedit_prompt )
168 #define num_ok_lines (S.num_ok_lines )
169 #define user_buf (S.user_buf )
170 #define home_pwd_buf (S.home_pwd_buf )
171 #define matches (S.matches )
172 #define num_matches (S.num_matches )
173 #define delptr (S.delptr )
174 #define newdelflag (S.newdelflag )
175 #define delbuf (S.delbuf )
177 #define INIT_S() do { \
178 (*(struct lineedit_statics**)&lineedit_ptr_to_statics) = xzalloc(sizeof(S)); \
180 cmdedit_termw = 80; \
181 IF_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines = 1;) \
182 IF_FEATURE_GETUSERNAME_AND_HOMEDIR(home_pwd_buf = (char*)null_str;) \
184 static void deinit_S(void)
186 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
187 /* This one is allocated only if FANCY_PROMPT is on
188 * (otherwise it points to verbatim prompt (NOT malloced) */
189 free((char*)cmdedit_prompt);
191 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
193 if (home_pwd_buf != null_str)
196 free(lineedit_ptr_to_statics);
198 #define DEINIT_S() deinit_S()
201 #if ENABLE_FEATURE_ASSUME_UNICODE
202 static size_t load_string(const char *src, int maxsize)
204 ssize_t len = mbstowcs(command_ps, src, maxsize - 1);
207 command_ps[len] = L'\0';
210 static size_t save_string(char *dst, int maxsize)
212 ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
218 /* I thought just fputwc(c, stdout) would work. But no... */
219 static void BB_PUTCHAR(wchar_t c)
221 char buf[MB_CUR_MAX + 1];
222 mbstate_t mbst = { 0 };
223 ssize_t len = wcrtomb(buf, c, &mbst);
231 static size_t load_string(const char *src, int maxsize)
233 safe_strncpy(command_ps, src, maxsize);
234 return strlen(command_ps);
236 # if ENABLE_FEATURE_TAB_COMPLETION
237 static void save_string(char *dst, int maxsize)
239 safe_strncpy(dst, command_ps, maxsize);
242 # define BB_PUTCHAR(c) bb_putchar(c)
246 /* Put 'command_ps[cursor]', cursor++.
247 * Advance cursor on screen. If we reached right margin, scroll text up
248 * and remove terminal margin effect by printing 'next_char' */
249 #define HACK_FOR_WRONG_WIDTH 1
250 #if HACK_FOR_WRONG_WIDTH
251 static void cmdedit_set_out_char(void)
252 #define cmdedit_set_out_char(next_char) cmdedit_set_out_char()
254 static void cmdedit_set_out_char(int next_char)
257 CHAR_T c = command_ps[cursor];
260 /* erase character after end of input string */
263 #if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
264 /* Display non-printable characters in reverse */
265 if (!BB_isprint(c)) {
272 printf("\033[7m%c\033[0m", c);
278 if (++cmdedit_x >= cmdedit_termw) {
279 /* terminal is scrolled down */
282 #if HACK_FOR_WRONG_WIDTH
283 /* This works better if our idea of term width is wrong
284 * and it is actually wider (often happens on serial lines).
285 * Printing CR,LF *forces* cursor to next line.
286 * OTOH if terminal width is correct AND terminal does NOT
287 * have automargin (IOW: it is moving cursor to next line
288 * by itself (which is wrong for VT-10x terminals)),
289 * this will break things: there will be one extra empty line */
290 puts("\r"); /* + implicit '\n' */
292 /* Works ok only if cmdedit_termw is correct */
293 /* destroy "(auto)margin" */
294 bb_putchar(next_char);
298 // Huh? What if command_ps[cursor] == BB_NUL (we are at the end already?)
302 /* Move to end of line (by printing all chars till the end) */
303 static void input_end(void)
305 while (cursor < command_len)
306 cmdedit_set_out_char(' ');
309 /* Go to the next line */
310 static void goto_new_line(void)
318 static void out1str(const char *s)
324 static void beep(void)
329 /* Move back one character */
330 /* (optimized for slow terminals) */
331 static void input_backward(unsigned num)
341 if (cmdedit_x >= num) {
344 /* This is longer by 5 bytes on x86.
345 * Also gets miscompiled for ARM users
346 * (busybox.net/bugs/view.php?id=2274).
347 * printf(("\b\b\b\b" + 4) - num);
355 printf("\033[%uD", num);
359 /* Need to go one or more lines up */
362 unsigned w = cmdedit_termw; /* volatile var */
363 count_y = 1 + (num / w);
364 cmdedit_y -= count_y;
365 cmdedit_x = w * count_y - num;
367 /* go to 1st column; go up; go to correct column */
368 printf("\r" "\033[%dA" "\033[%dC", count_y, cmdedit_x);
371 static void put_prompt(void)
373 out1str(cmdedit_prompt);
374 if (ENABLE_FEATURE_EDITING_ASK_TERMINAL) {
375 /* Ask terminal where is the cursor now.
376 * lineedit_read_key handles response and corrects
377 * our idea of current cursor position.
378 * Testcase: run "echo -n long_line_long_line_long_line",
379 * then type in a long, wrapping command and try to
380 * delete it using backspace key.
381 * Note: we print it _after_ prompt, because
382 * prompt may contain CR. Example: PS1='\[\r\n\]\w '
384 out1str("\033" "[6n");
388 unsigned w = cmdedit_termw; /* volatile var */
389 cmdedit_y = cmdedit_prmt_len / w; /* new quasireal y */
390 cmdedit_x = cmdedit_prmt_len % w;
394 /* draw prompt, editor line, and clear tail */
395 static void redraw(int y, int back_cursor)
397 if (y > 0) /* up to start y */
398 printf("\033[%uA", y);
401 input_end(); /* rewrite */
402 printf("\033[J"); /* erase after cursor */
403 input_backward(back_cursor);
406 /* Delete the char in front of the cursor, optionally saving it
407 * for later putback */
408 #if !ENABLE_FEATURE_EDITING_VI
409 static void input_delete(void)
410 #define input_delete(save) input_delete()
412 static void input_delete(int save)
417 if (j == (int)command_len)
420 #if ENABLE_FEATURE_EDITING_VI
426 if ((delptr - delbuf) < DELBUFSIZ)
427 *delptr++ = command_ps[j];
431 memmove(command_ps + j, command_ps + j + 1,
432 /* (command_len + 1 [because of NUL]) - (j + 1)
433 * simplified into (command_len - j) */
434 (command_len - j) * sizeof(command_ps[0]));
436 input_end(); /* rewrite new line */
437 cmdedit_set_out_char(' '); /* erase char */
438 input_backward(cursor - j); /* back to old pos cursor */
441 #if ENABLE_FEATURE_EDITING_VI
442 static void put(void)
445 int j = delptr - delbuf;
450 /* open hole and then fill it */
451 memmove(command_ps + cursor + j, command_ps + cursor,
452 (command_len - cursor + 1) * sizeof(command_ps[0]));
453 memcpy(command_ps + cursor, delbuf, j * sizeof(command_ps[0]));
455 input_end(); /* rewrite new line */
456 input_backward(cursor - ocursor - j + 1); /* at end of new text */
460 /* Delete the char in back of the cursor */
461 static void input_backspace(void)
469 /* Move forward one character */
470 static void input_forward(void)
472 if (cursor < command_len)
473 cmdedit_set_out_char(command_ps[cursor + 1]);
476 #if ENABLE_FEATURE_TAB_COMPLETION
478 static void free_tab_completion_data(void)
482 free(matches[--num_matches]);
488 static void add_match(char *matched)
490 matches = xrealloc_vector(matches, 4, num_matches);
491 matches[num_matches] = matched;
495 #if ENABLE_FEATURE_USERNAME_COMPLETION
496 static void username_tab_completion(char *ud, char *with_shash_flg)
498 struct passwd *entry;
501 ud++; /* ~user/... to user/... */
502 userlen = strlen(ud);
504 if (with_shash_flg) { /* "~/..." or "~user/..." */
505 char *sav_ud = ud - 1;
508 if (*ud == '/') { /* "~/..." */
513 temp = strchr(ud, '/');
514 *temp = '\0'; /* ~user\0 */
515 entry = getpwnam(ud);
516 *temp = '/'; /* restore ~user/... */
519 home = entry->pw_dir;
522 if ((userlen + strlen(home) + 1) < MAX_LINELEN) {
524 sprintf(sav_ud, "%s%s", home, ud);
529 /* Using _r function to avoid pulling in static buffers */
532 struct passwd *result;
535 while (!getpwent_r(&pwd, line_buff, sizeof(line_buff), &result)) {
536 /* Null usernames should result in all users as possible completions. */
537 if (/*!userlen || */ strncmp(ud, pwd.pw_name, userlen) == 0) {
538 add_match(xasprintf("~%s/", pwd.pw_name));
544 #endif /* FEATURE_COMMAND_USERNAME_COMPLETION */
552 static int path_parse(char ***p, int flags)
559 /* if not setenv PATH variable, to search cur dir "." */
560 if (flags != FIND_EXE_ONLY)
563 if (state->flags & WITH_PATH_LOOKUP)
564 pth = state->path_lookup;
566 pth = getenv("PATH");
567 /* PATH=<empty> or PATH=:<empty> */
568 if (!pth || !pth[0] || LONE_CHAR(pth, ':'))
572 npth = 1; /* path component count */
574 tmp = strchr(tmp, ':');
578 break; /* :<empty> */
582 res = xmalloc(npth * sizeof(char*));
583 res[0] = tmp = xstrdup(pth);
586 tmp = strchr(tmp, ':');
589 *tmp++ = '\0'; /* ':' -> '\0' */
591 break; /* :<empty> */
598 static void exe_n_cwd_tab_completion(char *command, int type)
604 char **paths = path1;
608 char *pfind = strrchr(command, '/');
609 /* char dirbuf[MAX_LINELEN]; */
610 #define dirbuf (S.exe_n_cwd_tab_completion__dirbuf)
613 path1[0] = (char*)".";
616 /* no dir, if flags==EXE_ONLY - get paths, else "." */
617 npaths = path_parse(&paths, type);
620 /* dirbuf = ".../.../.../" */
621 safe_strncpy(dirbuf, command, (pfind - command) + 2);
622 #if ENABLE_FEATURE_USERNAME_COMPLETION
623 if (dirbuf[0] == '~') /* ~/... or ~user/... */
624 username_tab_completion(dirbuf, dirbuf);
627 /* point to 'l' in "..../last_component" */
631 for (i = 0; i < npaths; i++) {
632 dir = opendir(paths[i]);
634 continue; /* don't print an error */
636 while ((next = readdir(dir)) != NULL) {
638 const char *str_found = next->d_name;
641 if (strncmp(str_found, pfind, strlen(pfind)))
643 /* not see .name without .match */
644 if (*str_found == '.' && *pfind == '\0') {
645 if (NOT_LONE_CHAR(paths[i], '/') || str_found[1])
647 str_found = ""; /* only "/" */
649 found = concat_path_file(paths[i], str_found);
650 /* hmm, remove in progress? */
651 /* NB: stat() first so that we see is it a directory;
652 * but if that fails, use lstat() so that
653 * we still match dangling links */
654 if (stat(found, &st) && lstat(found, &st))
656 /* find with dirs? */
657 if (paths[i] != dirbuf)
658 strcpy(found, next->d_name); /* only name */
660 len1 = strlen(found);
661 found = xrealloc(found, len1 + 2);
663 found[len1+1] = '\0';
665 if (S_ISDIR(st.st_mode)) {
666 /* name is a directory */
667 if (found[len1-1] != '/') {
671 /* not put found file if search only dirs for cd */
672 if (type == FIND_DIR_ONLY)
675 /* Add it to the list */
683 if (paths != path1) {
684 free(paths[0]); /* allocated memory is only in first member */
690 /* QUOT is used on elements of int_buf[], which are bytes,
691 * not Unicode chars. Therefore it works correctly even in Unicode mode.
693 #define QUOT (UCHAR_MAX+1)
695 #define int_buf (S.find_match__int_buf)
696 #define pos_buf (S.find_match__pos_buf)
697 /* is must be <= in */
698 static void collapse_pos(int is, int in)
700 memmove(int_buf+is, int_buf+in, (MAX_LINELEN+1-in)*sizeof(int_buf[0]));
701 memmove(pos_buf+is, pos_buf+in, (MAX_LINELEN+1-in)*sizeof(pos_buf[0]));
703 static NOINLINE int find_match(char *matchBuf, int *len_with_quotes)
708 /* Were local, but it uses too much stack */
709 /* int16_t int_buf[MAX_LINELEN + 1]; */
710 /* int16_t pos_buf[MAX_LINELEN + 1]; */
712 /* set to integer dimension characters and own positions */
714 int_buf[i] = (unsigned char)matchBuf[i];
715 if (int_buf[i] == 0) {
716 pos_buf[i] = -1; /* end-fo-line indicator */
722 /* mask \+symbol and convert '\t' to ' ' */
723 for (i = j = 0; matchBuf[i]; i++, j++)
724 if (matchBuf[i] == '\\') {
725 collapse_pos(j, j + 1);
728 #if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
729 if (matchBuf[i] == '\t') /* algorithm equivalent */
730 int_buf[j] = ' ' | QUOT;
733 #if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
734 else if (matchBuf[i] == '\t')
738 /* mask "symbols" or 'symbols' */
740 for (i = 0; int_buf[i]; i++) {
742 if (c == '\'' || c == '"') {
751 } else if (c2 != 0 && c != '$')
755 /* skip commands with arguments if line has commands delimiters */
756 /* ';' ';;' '&' '|' '&&' '||' but `>&' `<&' `>|' */
757 for (i = 0; int_buf[i]; i++) {
760 j = i ? int_buf[i - 1] : -1;
762 if (c == ';' || c == '&' || c == '|') {
763 command_mode = 1 + (c == c2);
765 if (j == '>' || j == '<')
767 } else if (c == '|' && j == '>')
771 collapse_pos(0, i + command_mode);
772 i = -1; /* hack incremet */
775 /* collapse `command...` */
776 for (i = 0; int_buf[i]; i++) {
777 if (int_buf[i] == '`') {
778 for (j = i + 1; int_buf[j]; j++)
779 if (int_buf[j] == '`') {
780 collapse_pos(i, j + 1);
785 /* not found closing ` - command mode, collapse all previous */
786 collapse_pos(0, i + 1);
789 i--; /* hack incremet */
793 /* collapse (command...(command...)...) or {command...{command...}...} */
794 c = 0; /* "recursive" level */
796 for (i = 0; int_buf[i]; i++) {
797 if (int_buf[i] == '(' || int_buf[i] == '{') {
798 if (int_buf[i] == '(')
802 collapse_pos(0, i + 1);
803 i = -1; /* hack incremet */
806 for (i = 0; pos_buf[i] >= 0 && (c > 0 || c2 > 0); i++) {
807 if ((int_buf[i] == ')' && c > 0) || (int_buf[i] == '}' && c2 > 0)) {
808 if (int_buf[i] == ')')
812 collapse_pos(0, i + 1);
813 i = -1; /* hack incremet */
817 /* skip first not quote space */
818 for (i = 0; int_buf[i]; i++)
819 if (int_buf[i] != ' ')
824 /* set find mode for completion */
825 command_mode = FIND_EXE_ONLY;
826 for (i = 0; int_buf[i]; i++) {
827 if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
828 if (int_buf[i] == ' ' && command_mode == FIND_EXE_ONLY
829 && matchBuf[pos_buf[0]] == 'c'
830 && matchBuf[pos_buf[1]] == 'd'
832 command_mode = FIND_DIR_ONLY;
834 command_mode = FIND_FILE_ONLY;
839 for (i = 0; int_buf[i]; i++)
842 for (--i; i >= 0; i--) {
844 if (c == ' ' || c == '<' || c == '>' || c == '|' || c == '&') {
845 collapse_pos(0, i + 1);
849 /* skip first not quoted '\'' or '"' */
850 for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++)
852 /* collapse quote or unquote // or /~ */
853 while ((int_buf[i] & ~QUOT) == '/'
854 && ((int_buf[i+1] & ~QUOT) == '/' || (int_buf[i+1] & ~QUOT) == '~')
859 /* set only match and destroy quotes */
861 for (c = 0; pos_buf[i] >= 0; i++) {
862 matchBuf[c++] = matchBuf[pos_buf[i]];
866 /* old length matchBuf with quotes symbols */
867 *len_with_quotes = j ? j - pos_buf[0] : 0;
875 * display by column (original idea from ls applet,
876 * very optimized by me :)
878 static void showfiles(void)
881 int column_width = 0;
882 int nfiles = num_matches;
886 /* find the longest file name - use that as the column width */
887 for (row = 0; row < nrows; row++) {
888 l = bb_mbstrlen(matches[row]);
889 if (column_width < l)
892 column_width += 2; /* min space for columns */
893 ncols = cmdedit_termw / column_width;
898 nrows++; /* round up fractionals */
902 for (row = 0; row < nrows; row++) {
906 for (nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++) {
907 printf("%s%-*s", matches[n],
908 (int)(column_width - bb_mbstrlen(matches[n])), ""
915 static char *add_quote_for_spec_chars(char *found)
918 char *s = xzalloc((strlen(found) + 1) * 2);
921 if (strchr(" `\"#$%^&*()=+{}[]:;'|\\<>", *found))
925 /* s[l] = '\0'; - already is */
929 /* Do TAB completion */
930 static void input_tab(smallint *lastWasTab)
932 if (!(state->flags & TAB_COMPLETION))
938 /* char matchBuf[MAX_LINELEN]; */
939 #define matchBuf (S.input_tab__matchBuf)
942 #if ENABLE_FEATURE_ASSUME_UNICODE
943 /* cursor pos in command converted to multibyte form */
947 *lastWasTab = TRUE; /* flop trigger */
949 /* Make a local copy of the string --
950 * up to the position of the cursor */
951 save_string(matchBuf, cursor + 1);
952 #if ENABLE_FEATURE_ASSUME_UNICODE
953 cursor_mb = strlen(matchBuf);
957 find_type = find_match(matchBuf, &recalc_pos);
959 /* Free up any memory already allocated */
960 free_tab_completion_data();
962 #if ENABLE_FEATURE_USERNAME_COMPLETION
963 /* If the word starts with `~' and there is no slash in the word,
964 * then try completing this word as a username. */
965 if (state->flags & USERNAME_COMPLETION)
966 if (matchBuf[0] == '~' && strchr(matchBuf, '/') == NULL)
967 username_tab_completion(matchBuf, NULL);
969 /* Try to match any executable in our path and everything
970 * in the current working directory */
972 exe_n_cwd_tab_completion(matchBuf, find_type);
973 /* Sort, then remove any duplicates found */
977 qsort_string_vector(matches, num_matches);
978 for (i = 0; i < num_matches - 1; ++i) {
979 if (matches[i] && matches[i+1]) { /* paranoia */
980 if (strcmp(matches[i], matches[i+1]) == 0) {
982 matches[i] = NULL; /* paranoia */
984 matches[n++] = matches[i];
988 matches[n] = matches[i];
991 /* Did we find exactly one match? */
992 if (!matches || num_matches > 1) { /* no */
995 return; /* not found */
996 /* find minimal match */
997 tmp1 = xstrdup(matches[0]);
998 for (tmp = tmp1; *tmp; tmp++) {
999 for (len_found = 1; len_found < num_matches; len_found++) {
1000 if (matches[len_found][tmp - tmp1] != *tmp) {
1006 if (*tmp1 == '\0') { /* have unique */
1010 tmp = add_quote_for_spec_chars(tmp1);
1012 } else { /* one match */
1013 tmp = add_quote_for_spec_chars(matches[0]);
1014 /* for next completion current found */
1015 *lastWasTab = FALSE;
1017 len_found = strlen(tmp);
1018 if (tmp[len_found-1] != '/') {
1019 tmp[len_found] = ' ';
1020 tmp[len_found+1] = '\0';
1024 len_found = strlen(tmp);
1025 #if !ENABLE_FEATURE_ASSUME_UNICODE
1026 /* have space to place the match? */
1027 /* The result consists of three parts with these lengths: */
1028 /* (cursor - recalc_pos) + len_found + (command_len - cursor) */
1029 /* it simplifies into: */
1030 if ((int)(len_found + command_len - recalc_pos) < S.maxsize) {
1032 strcpy(matchBuf, command_ps + cursor);
1033 /* add match and tail */
1034 sprintf(&command_ps[cursor - recalc_pos], "%s%s", tmp, matchBuf);
1035 command_len = strlen(command_ps);
1037 recalc_pos = cursor - recalc_pos + len_found;
1038 /* write out the matched command */
1039 redraw(cmdedit_y, command_len - recalc_pos);
1043 char command[MAX_LINELEN];
1044 int len = save_string(command, sizeof(command));
1045 /* have space to place the match? */
1046 /* (cursor_mb - recalc_pos) + len_found + (len - cursor_mb) */
1047 if ((int)(len_found + len - recalc_pos) < MAX_LINELEN) {
1049 strcpy(matchBuf, command + cursor_mb);
1050 /* where do we want to have cursor after all? */
1051 strcpy(&command[cursor_mb - recalc_pos], tmp);
1052 len = load_string(command, S.maxsize);
1053 /* add match and tail */
1054 sprintf(&command[cursor_mb - recalc_pos], "%s%s", tmp, matchBuf);
1055 command_len = load_string(command, S.maxsize);
1056 /* write out the matched command */
1057 redraw(cmdedit_y, command_len - len);
1064 /* Ok -- the last char was a TAB. Since they
1065 * just hit TAB again, print a list of all the
1066 * available choices... */
1067 if (matches && num_matches > 0) {
1068 /* changed by goto_new_line() */
1069 int sav_cursor = cursor;
1071 /* Go to the next line */
1074 redraw(0, command_len - sav_cursor);
1079 #endif /* FEATURE_COMMAND_TAB_COMPLETION */
1082 line_input_t* FAST_FUNC new_line_input_t(int flags)
1084 line_input_t *n = xzalloc(sizeof(*n));
1092 static void save_command_ps_at_cur_history(void)
1094 if (command_ps[0] != BB_NUL) {
1095 int cur = state->cur_history;
1096 free(state->history[cur]);
1098 #if ENABLE_FEATURE_ASSUME_UNICODE
1100 char tbuf[MAX_LINELEN];
1101 save_string(tbuf, sizeof(tbuf));
1102 state->history[cur] = xstrdup(tbuf);
1105 state->history[cur] = xstrdup(command_ps);
1110 /* state->flags is already checked to be nonzero */
1111 static int get_previous_history(void)
1113 if ((state->flags & DO_HISTORY) && state->cur_history) {
1114 save_command_ps_at_cur_history();
1115 state->cur_history--;
1122 static int get_next_history(void)
1124 if (state->flags & DO_HISTORY) {
1125 if (state->cur_history < state->cnt_history) {
1126 save_command_ps_at_cur_history(); /* save the current history line */
1127 return ++state->cur_history;
1134 #if ENABLE_FEATURE_EDITING_SAVEHISTORY
1135 /* We try to ensure that concurrent additions to the history
1136 * do not overwrite each other.
1137 * Otherwise shell users get unhappy.
1139 * History file is trimmed lazily, when it grows several times longer
1140 * than configured MAX_HISTORY lines.
1143 static void free_line_input_t(line_input_t *n)
1145 int i = n->cnt_history;
1147 free(n->history[--i]);
1151 /* state->flags is already checked to be nonzero */
1152 static void load_history(line_input_t *st_parm)
1154 char *temp_h[MAX_HISTORY];
1157 unsigned idx, i, line_len;
1159 /* NB: do not trash old history if file can't be opened */
1161 fp = fopen_for_read(st_parm->hist_file);
1163 /* clean up old history */
1164 for (idx = st_parm->cnt_history; idx > 0;) {
1166 free(st_parm->history[idx]);
1167 st_parm->history[idx] = NULL;
1170 /* fill temp_h[], retaining only last MAX_HISTORY lines */
1171 memset(temp_h, 0, sizeof(temp_h));
1172 st_parm->cnt_history_in_file = idx = 0;
1173 while ((line = xmalloc_fgetline(fp)) != NULL) {
1174 if (line[0] == '\0') {
1180 st_parm->cnt_history_in_file++;
1182 if (idx == MAX_HISTORY)
1187 /* find first non-NULL temp_h[], if any */
1188 if (st_parm->cnt_history_in_file) {
1189 while (temp_h[idx] == NULL) {
1191 if (idx == MAX_HISTORY)
1196 /* copy temp_h[] to st_parm->history[] */
1197 for (i = 0; i < MAX_HISTORY;) {
1202 if (idx == MAX_HISTORY)
1204 line_len = strlen(line);
1205 if (line_len >= MAX_LINELEN)
1206 line[MAX_LINELEN-1] = '\0';
1207 st_parm->history[i++] = line;
1209 st_parm->cnt_history = i;
1213 /* state->flags is already checked to be nonzero */
1214 static void save_history(char *str)
1219 fd = open(state->hist_file, O_WRONLY | O_CREAT | O_APPEND, 0666);
1222 xlseek(fd, 0, SEEK_END); /* paranoia */
1224 str[len] = '\n'; /* we (try to) do atomic write */
1225 len2 = full_write(fd, str, len + 1);
1228 if (len2 != len + 1)
1229 return; /* "wtf?" */
1231 /* did we write so much that history file needs trimming? */
1232 state->cnt_history_in_file++;
1233 if (state->cnt_history_in_file > MAX_HISTORY * 4) {
1236 line_input_t *st_temp;
1239 /* we may have concurrently written entries from others.
1241 st_temp = new_line_input_t(state->flags);
1242 st_temp->hist_file = state->hist_file;
1243 load_history(st_temp);
1245 /* write out temp file and replace hist_file atomically */
1246 new_name = xasprintf("%s.%u.new", state->hist_file, (int) getpid());
1247 fp = fopen_for_write(new_name);
1249 for (i = 0; i < st_temp->cnt_history; i++)
1250 fprintf(fp, "%s\n", st_temp->history[i]);
1252 if (rename(new_name, state->hist_file) == 0)
1253 state->cnt_history_in_file = st_temp->cnt_history;
1256 free_line_input_t(st_temp);
1260 #define load_history(a) ((void)0)
1261 #define save_history(a) ((void)0)
1262 #endif /* FEATURE_COMMAND_SAVEHISTORY */
1264 static void remember_in_history(char *str)
1268 if (!(state->flags & DO_HISTORY))
1272 i = state->cnt_history;
1273 /* Don't save dupes */
1274 if (i && strcmp(state->history[i-1], str) == 0)
1277 free(state->history[MAX_HISTORY]); /* redundant, paranoia */
1278 state->history[MAX_HISTORY] = NULL; /* redundant, paranoia */
1280 /* If history[] is full, remove the oldest command */
1281 /* we need to keep history[MAX_HISTORY] empty, hence >=, not > */
1282 if (i >= MAX_HISTORY) {
1283 free(state->history[0]);
1284 for (i = 0; i < MAX_HISTORY-1; i++)
1285 state->history[i] = state->history[i+1];
1286 /* i == MAX_HISTORY-1 */
1288 /* i <= MAX_HISTORY-1 */
1289 state->history[i++] = xstrdup(str);
1290 /* i <= MAX_HISTORY */
1291 state->cur_history = i;
1292 state->cnt_history = i;
1293 #if ENABLE_FEATURE_EDITING_SAVEHISTORY
1294 if ((state->flags & SAVE_HISTORY) && state->hist_file)
1297 IF_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines++;)
1300 #else /* MAX_HISTORY == 0 */
1301 #define remember_in_history(a) ((void)0)
1302 #endif /* MAX_HISTORY */
1306 * This function is used to grab a character buffer
1307 * from the input file descriptor and allows you to
1308 * a string with full command editing (sort of like
1311 * The following standard commands are not implemented:
1312 * ESC-b -- Move back one word
1313 * ESC-f -- Move forward one word
1314 * ESC-d -- Delete back one word
1315 * ESC-h -- Delete forward one word
1316 * CTL-t -- Transpose two characters
1318 * Minimalist vi-style command line editing available if configured.
1319 * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
1322 #if ENABLE_FEATURE_EDITING_VI
1324 vi_Word_motion(int eat)
1326 CHAR_T *command = command_ps;
1328 while (cursor < command_len && !BB_isspace(command[cursor]))
1330 if (eat) while (cursor < command_len && BB_isspace(command[cursor]))
1335 vi_word_motion(int eat)
1337 CHAR_T *command = command_ps;
1339 if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
1340 while (cursor < command_len
1341 && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
1345 } else if (BB_ispunct(command[cursor])) {
1346 while (cursor < command_len && BB_ispunct(command[cursor+1]))
1350 if (cursor < command_len)
1354 while (cursor < command_len && BB_isspace(command[cursor]))
1362 CHAR_T *command = command_ps;
1365 while (cursor < command_len && BB_isspace(command[cursor]))
1367 while (cursor < command_len-1 && !BB_isspace(command[cursor+1]))
1374 CHAR_T *command = command_ps;
1376 if (cursor >= command_len-1)
1379 while (cursor < command_len-1 && BB_isspace(command[cursor]))
1381 if (cursor >= command_len-1)
1383 if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
1384 while (cursor < command_len-1
1385 && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
1389 } else if (BB_ispunct(command[cursor])) {
1390 while (cursor < command_len-1 && BB_ispunct(command[cursor+1]))
1396 vi_Back_motion(void)
1398 CHAR_T *command = command_ps;
1400 while (cursor > 0 && BB_isspace(command[cursor-1]))
1402 while (cursor > 0 && !BB_isspace(command[cursor-1]))
1407 vi_back_motion(void)
1409 CHAR_T *command = command_ps;
1414 while (cursor > 0 && BB_isspace(command[cursor]))
1418 if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
1420 && (BB_isalnum(command[cursor-1]) || command[cursor-1] == '_')
1424 } else if (BB_ispunct(command[cursor])) {
1425 while (cursor > 0 && BB_ispunct(command[cursor-1]))
1433 * read_line_input and its helpers
1436 #if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
1437 static void parse_and_put_prompt(const char *prmt_ptr)
1439 cmdedit_prompt = prmt_ptr;
1440 cmdedit_prmt_len = strlen(prmt_ptr);
1444 static void parse_and_put_prompt(const char *prmt_ptr)
1447 size_t cur_prmt_len = 0;
1448 char flg_not_length = '[';
1449 char *prmt_mem_ptr = xzalloc(1);
1450 char *cwd_buf = xrealloc_getcwd_or_warn(NULL);
1455 cmdedit_prmt_len = 0;
1458 cwd_buf = (char *)bb_msg_unknown;
1461 cbuf[1] = '\0'; /* never changes */
1464 char *free_me = NULL;
1469 const char *cp = prmt_ptr;
1472 c = bb_process_escape_sequence(&prmt_ptr);
1473 if (prmt_ptr == cp) {
1479 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
1481 pbuf = user_buf ? user_buf : (char*)"";
1485 pbuf = free_me = safe_gethostname();
1486 *strchrnul(pbuf, '.') = '\0';
1489 c = (geteuid() == 0 ? '#' : '$');
1491 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
1493 /* /home/user[/something] -> ~[/something] */
1495 l = strlen(home_pwd_buf);
1497 && strncmp(home_pwd_buf, cwd_buf, l) == 0
1498 && (cwd_buf[l]=='/' || cwd_buf[l]=='\0')
1499 && strlen(cwd_buf + l) < PATH_MAX
1501 pbuf = free_me = xasprintf("~%s", cwd_buf + l);
1507 cp = strrchr(pbuf, '/');
1508 if (cp != NULL && cp != pbuf)
1509 pbuf += (cp-pbuf) + 1;
1512 pbuf = free_me = xasprintf("%d", num_ok_lines);
1514 case 'e': case 'E': /* \e \E = \033 */
1517 case 'x': case 'X': {
1519 for (l = 0; l < 3;) {
1521 buf2[l++] = *prmt_ptr;
1523 h = strtoul(buf2, &pbuf, 16);
1524 if (h > UCHAR_MAX || (pbuf - buf2) < l) {
1530 c = (char)strtoul(buf2, NULL, 16);
1537 if (c == flg_not_length) {
1538 flg_not_length = (flg_not_length == '[' ? ']' : '[');
1546 cur_prmt_len = strlen(pbuf);
1547 prmt_len += cur_prmt_len;
1548 if (flg_not_length != ']')
1549 cmdedit_prmt_len += cur_prmt_len;
1550 prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_len+1), pbuf);
1554 if (cwd_buf != (char *)bb_msg_unknown)
1556 cmdedit_prompt = prmt_mem_ptr;
1561 static void cmdedit_setwidth(unsigned w, int redraw_flg)
1565 /* new y for current cursor */
1566 int new_y = (cursor + cmdedit_prmt_len) / w;
1568 redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
1573 static void win_changed(int nsig)
1576 get_terminal_width_height(0, &width, NULL);
1577 cmdedit_setwidth(width, nsig /* - just a yes/no flag */);
1578 if (nsig == SIGWINCH)
1579 signal(SIGWINCH, win_changed); /* rearm ourself */
1582 static int lineedit_read_key(char *read_key_buffer)
1587 #if ENABLE_FEATURE_ASSUME_UNICODE
1588 char unicode_buf[MB_CUR_MAX + 1];
1589 int unicode_idx = 0;
1592 pfd.fd = STDIN_FILENO;
1593 pfd.events = POLLIN;
1596 if (read_key_buffer[0] == 0) {
1597 /* Wait for input. Can't just call read_key,
1598 * it returns at once if stdin
1599 * is in non-blocking mode. */
1600 safe_poll(&pfd, 1, delay);
1602 /* Note: read_key sets errno to 0 on success: */
1603 ic = read_key(STDIN_FILENO, read_key_buffer);
1604 if (ENABLE_FEATURE_EDITING_ASK_TERMINAL
1605 && (int32_t)ic == KEYCODE_CURSOR_POS
1607 int col = ((ic >> 32) & 0x7fff) - 1;
1608 if (col > cmdedit_prmt_len) {
1609 cmdedit_x += (col - cmdedit_prmt_len);
1610 while (cmdedit_x >= cmdedit_termw) {
1611 cmdedit_x -= cmdedit_termw;
1618 #if ENABLE_FEATURE_ASSUME_UNICODE
1622 if ((int32_t)ic < 0) /* KEYCODE_xxx */
1624 unicode_buf[unicode_idx++] = ic;
1625 unicode_buf[unicode_idx] = '\0';
1626 if (mbstowcs(&wc, unicode_buf, 1) != 1 && unicode_idx < MB_CUR_MAX) {
1633 } while (errno == EAGAIN);
1638 /* leave out the "vi-mode"-only case labels if vi editing isn't
1640 #define vi_case(caselabel) IF_FEATURE_EDITING_VI(case caselabel)
1642 /* convert uppercase ascii to equivalent control char, for readability */
1644 #define CTRL(a) ((a) & ~0x40)
1646 /* maxsize must be >= 2.
1648 * -1 on read errors or EOF, or on bare Ctrl-D,
1649 * 0 on ctrl-C (the line entered is still returned in 'command'),
1650 * >0 length of input string, including terminating '\n'
1652 int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, line_input_t *st)
1655 #if ENABLE_FEATURE_TAB_COMPLETION
1656 smallint lastWasTab = FALSE;
1658 smallint break_out = 0;
1659 #if ENABLE_FEATURE_EDITING_VI
1660 smallint vi_cmdmode = 0;
1662 struct termios initial_settings;
1663 struct termios new_settings;
1664 char read_key_buffer[KEYCODE_BUFFER_SIZE];
1668 if (tcgetattr(STDIN_FILENO, &initial_settings) < 0
1669 || !(initial_settings.c_lflag & ECHO)
1671 /* Happens when e.g. stty -echo was run before */
1672 parse_and_put_prompt(prompt);
1674 if (fgets(command, maxsize, stdin) == NULL)
1675 len = -1; /* EOF or error */
1677 len = strlen(command);
1682 check_unicode_in_env();
1684 // FIXME: audit & improve this
1685 if (maxsize > MAX_LINELEN)
1686 maxsize = MAX_LINELEN;
1687 S.maxsize = maxsize;
1689 /* With null flags, no other fields are ever used */
1690 state = st ? st : (line_input_t*) &const_int_0;
1691 #if ENABLE_FEATURE_EDITING_SAVEHISTORY
1692 if ((state->flags & SAVE_HISTORY) && state->hist_file)
1693 if (state->cnt_history == 0)
1694 load_history(state);
1696 if (state->flags & DO_HISTORY)
1697 state->cur_history = state->cnt_history;
1699 /* prepare before init handlers */
1700 cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
1702 #if ENABLE_FEATURE_ASSUME_UNICODE
1703 command_ps = xzalloc(maxsize * sizeof(command_ps[0]));
1705 command_ps = command;
1708 #define command command_must_not_be_used
1710 new_settings = initial_settings;
1711 new_settings.c_lflag &= ~ICANON; /* unbuffered input */
1712 /* Turn off echoing and CTRL-C, so we can trap it */
1713 new_settings.c_lflag &= ~(ECHO | ECHONL | ISIG);
1714 /* Hmm, in linux c_cc[] is not parsed if ICANON is off */
1715 new_settings.c_cc[VMIN] = 1;
1716 new_settings.c_cc[VTIME] = 0;
1717 /* Turn off CTRL-C, so we can trap it */
1718 #ifndef _POSIX_VDISABLE
1719 #define _POSIX_VDISABLE '\0'
1721 new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
1722 tcsetattr_stdin_TCSANOW(&new_settings);
1724 /* Now initialize things */
1725 previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
1726 win_changed(0); /* do initial resizing */
1727 #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
1729 struct passwd *entry;
1731 entry = getpwuid(geteuid());
1733 user_buf = xstrdup(entry->pw_name);
1734 home_pwd_buf = xstrdup(entry->pw_dir);
1740 for (i = 0; i <= MAX_HISTORY; i++)
1741 bb_error_msg("history[%d]:'%s'", i, state->history[i]);
1742 bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
1745 /* Print out the command prompt */
1746 parse_and_put_prompt(prompt);
1748 read_key_buffer[0] = 0;
1751 * The emacs and vi modes share much of the code in the big
1752 * command loop. Commands entered when in vi's command mode
1753 * (aka "escape mode") get an extra bit added to distinguish
1754 * them - this keeps them from being self-inserted. This
1755 * clutters the big switch a bit, but keeps all the code
1759 VI_CMDMODE_BIT = 0x40000000,
1760 /* 0x80000000 bit flags KEYCODE_xxx */
1765 ic = lineedit_read_key(read_key_buffer);
1767 #if ENABLE_FEATURE_EDITING_VI
1770 /* btw, since KEYCODE_xxx are all < 0, this doesn't
1771 * change ic if it contains one of them: */
1772 ic |= VI_CMDMODE_BIT;
1779 vi_case('\n'|VI_CMDMODE_BIT:)
1780 vi_case('\r'|VI_CMDMODE_BIT:)
1786 vi_case('0'|VI_CMDMODE_BIT:)
1787 /* Control-a -- Beginning of line */
1788 input_backward(cursor);
1791 vi_case('h'|VI_CMDMODE_BIT:)
1792 vi_case('\b'|VI_CMDMODE_BIT:)
1793 vi_case('\x7f'|VI_CMDMODE_BIT:) /* DEL */
1794 /* Control-b -- Move back one character */
1798 vi_case(CTRL('C')|VI_CMDMODE_BIT:)
1799 /* Control-c -- stop gathering input */
1802 break_out = -1; /* "do not append '\n'" */
1805 /* Control-d -- Delete one character, or exit
1806 * if the len=0 and no chars to delete */
1807 if (command_len == 0) {
1809 #if ENABLE_FEATURE_EDITING_VI
1812 /* to control stopped jobs */
1813 break_out = command_len = -1;
1819 vi_case('$'|VI_CMDMODE_BIT:)
1820 /* Control-e -- End of line */
1824 vi_case('l'|VI_CMDMODE_BIT:)
1825 vi_case(' '|VI_CMDMODE_BIT:)
1826 /* Control-f -- Move forward one character */
1830 case '\x7f': /* DEL */
1831 /* Control-h and DEL */
1834 #if ENABLE_FEATURE_TAB_COMPLETION
1836 input_tab(&lastWasTab);
1840 /* Control-k -- clear to end of line */
1841 command_ps[cursor] = BB_NUL;
1842 command_len = cursor;
1846 vi_case(CTRL('L')|VI_CMDMODE_BIT:)
1847 /* Control-l -- clear screen */
1849 redraw(0, command_len - cursor);
1853 vi_case(CTRL('N')|VI_CMDMODE_BIT:)
1854 vi_case('j'|VI_CMDMODE_BIT:)
1855 /* Control-n -- Get next command in history */
1856 if (get_next_history())
1860 vi_case(CTRL('P')|VI_CMDMODE_BIT:)
1861 vi_case('k'|VI_CMDMODE_BIT:)
1862 /* Control-p -- Get previous command from history */
1863 if (get_previous_history())
1868 vi_case(CTRL('U')|VI_CMDMODE_BIT:)
1869 /* Control-U -- Clear line before cursor */
1871 command_len -= cursor;
1872 memmove(command_ps, command_ps + cursor,
1873 (command_len + 1) * sizeof(command_ps[0]));
1874 redraw(cmdedit_y, command_len);
1878 vi_case(CTRL('W')|VI_CMDMODE_BIT:)
1879 /* Control-W -- Remove the last word */
1880 while (cursor > 0 && BB_isspace(command_ps[cursor-1]))
1882 while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
1886 #if ENABLE_FEATURE_EDITING_VI
1887 case 'i'|VI_CMDMODE_BIT:
1890 case 'I'|VI_CMDMODE_BIT:
1891 input_backward(cursor);
1894 case 'a'|VI_CMDMODE_BIT:
1898 case 'A'|VI_CMDMODE_BIT:
1902 case 'x'|VI_CMDMODE_BIT:
1905 case 'X'|VI_CMDMODE_BIT:
1911 case 'W'|VI_CMDMODE_BIT:
1914 case 'w'|VI_CMDMODE_BIT:
1917 case 'E'|VI_CMDMODE_BIT:
1920 case 'e'|VI_CMDMODE_BIT:
1923 case 'B'|VI_CMDMODE_BIT:
1926 case 'b'|VI_CMDMODE_BIT:
1929 case 'C'|VI_CMDMODE_BIT:
1932 case 'D'|VI_CMDMODE_BIT:
1935 case 'c'|VI_CMDMODE_BIT:
1938 case 'd'|VI_CMDMODE_BIT: {
1945 ic = lineedit_read_key(read_key_buffer);
1946 if (errno) /* error */
1947 goto prepare_to_die;
1949 if ((ic | VI_CMDMODE_BIT) == prev_ic) {
1951 input_backward(cursor);
1961 case 'w': /* "dw", "cw" */
1962 vi_word_motion(vi_cmdmode);
1964 case 'W': /* 'dW', 'cW' */
1965 vi_Word_motion(vi_cmdmode);
1967 case 'e': /* 'de', 'ce' */
1971 case 'E': /* 'dE', 'cE' */
1977 input_backward(cursor - sc);
1978 while (nc-- > cursor)
1981 case 'b': /* "db", "cb" */
1982 case 'B': /* implemented as B */
1987 while (sc-- > cursor)
1990 case ' ': /* "d ", "c " */
1993 case '$': /* "d$", "c$" */
1995 while (cursor < command_len)
2001 case 'p'|VI_CMDMODE_BIT:
2004 case 'P'|VI_CMDMODE_BIT:
2007 case 'r'|VI_CMDMODE_BIT:
2008 ic = lineedit_read_key(read_key_buffer);
2009 if (errno) /* error */
2010 goto prepare_to_die;
2011 if (ic < ' ' || ic > 255) {
2014 command_ps[cursor] = ic;
2019 case '\x1b': /* ESC */
2020 if (state->flags & VI_MODE) {
2021 /* insert mode --> command mode */
2026 #endif /* FEATURE_COMMAND_EDITING_VI */
2030 if (get_previous_history())
2035 if (!get_next_history())
2038 /* Rewrite the line with the selected history item */
2039 /* change command */
2040 command_len = load_string(state->history[state->cur_history] ? : "", maxsize);
2041 /* redraw and go to eol (bol, in vi) */
2042 redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
2051 case KEYCODE_DELETE:
2055 input_backward(cursor);
2062 // /* Control-V -- force insert of next char */
2063 // if (c == CTRL('V')) {
2064 // if (safe_read(STDIN_FILENO, &c, 1) < 1)
2065 // goto prepare_to_die;
2072 || (!ENABLE_FEATURE_ASSUME_UNICODE && ic >= 256)
2073 || (ENABLE_FEATURE_ASSUME_UNICODE && ic >= VI_CMDMODE_BIT)
2075 /* If VI_CMDMODE_BIT is set, ic is >= 256
2076 * and command mode ignores unexpected chars.
2077 * Otherwise, we are here if ic is a
2078 * control char or an unhandled ESC sequence,
2079 * which is also ignored.
2083 if ((int)command_len >= (maxsize - 2)) {
2084 /* Not enough space for the char and EOL */
2089 if (cursor == (command_len - 1)) {
2090 /* We are at the end, append */
2091 command_ps[cursor] = ic;
2092 command_ps[cursor + 1] = BB_NUL;
2093 cmdedit_set_out_char(' ');
2095 /* In the middle, insert */
2098 memmove(command_ps + sc + 1, command_ps + sc,
2099 (command_len - sc) * sizeof(command_ps[0]));
2100 command_ps[sc] = ic;
2102 /* rewrite from cursor */
2104 /* to prev x pos + 1 */
2105 input_backward(cursor - sc);
2108 } /* switch (input_key) */
2113 #if ENABLE_FEATURE_TAB_COMPLETION
2114 ic &= ~VI_CMDMODE_BIT;
2120 /* Stop bug catching using "command_must_not_be_used" trick */
2123 #if ENABLE_FEATURE_ASSUME_UNICODE
2124 command_len = save_string(command, maxsize - 1);
2128 if (command_len > 0)
2129 remember_in_history(command);
2131 if (break_out > 0) {
2132 command[command_len++] = '\n';
2133 command[command_len] = '\0';
2136 #if ENABLE_FEATURE_TAB_COMPLETION
2137 free_tab_completion_data();
2140 /* restore initial_settings */
2141 tcsetattr_stdin_TCSANOW(&initial_settings);
2142 /* restore SIGWINCH handler */
2143 signal(SIGWINCH, previous_SIGWINCH_handler);
2149 return len; /* can't return command_len, DEINIT_S() destroys it */
2154 #undef read_line_input
2155 int FAST_FUNC read_line_input(const char* prompt, char* command, int maxsize)
2157 fputs(prompt, stdout);
2159 fgets(command, maxsize, stdin);
2160 return strlen(command);
2163 #endif /* FEATURE_EDITING */
2174 const char *applet_name = "debug stuff usage";
2176 int main(int argc, char **argv)
2178 char buff[MAX_LINELEN];
2180 #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
2181 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
2182 "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
2183 "\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
2188 #if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
2189 setlocale(LC_ALL, "");
2193 l = read_line_input(prompt, buff);
2194 if (l <= 0 || buff[l-1] != '\n')
2197 printf("*** read_line_input() returned line =%s=\n", buff);
2199 printf("*** read_line_input() detect ^D\n");