blob: 1d5fef5ee05a9dc4add8e536831a4b6b5e09b50f [file] [log] [blame]
Erik Andersenc7c634b2000-03-19 05:28:55 +00001/* vi: set sw=4 ts=4: */
Erik Andersen13456d12000-03-16 08:09:57 +00002/*
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02003 * Command line editing.
Erik Andersen13456d12000-03-16 08:09:57 +00004 *
Eric Andersen81fe1232003-07-29 06:38:40 +00005 * Copyright (c) 1986-2003 may safely be consumed by a BSD or GPL license.
Eric Andersen7467c8d2001-07-12 20:26:32 +00006 * Written by: Vladimir Oleynik <dzo@simtreas.ru>
Eric Andersen5f2c79d2001-02-16 18:36:04 +00007 *
8 * Used ideas:
9 * Adam Rogoyski <rogoyski@cs.utexas.edu>
10 * Dave Cinege <dcinege@psychosis.com>
11 * Jakub Jelinek (c) 1995
Eric Andersen81fe1232003-07-29 06:38:40 +000012 * Erik Andersen <andersen@codepoet.org> (Majorly adjusted for busybox)
Eric Andersen5f2c79d2001-02-16 18:36:04 +000013 *
Erik Andersen13456d12000-03-16 08:09:57 +000014 * This code is 'as is' with no warranty.
Erik Andersen13456d12000-03-16 08:09:57 +000015 */
Erik Andersen13456d12000-03-16 08:09:57 +000016/*
Denis Vlasenko78ff8192008-06-28 21:03:43 +000017 * Usage and known bugs:
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010018 * Terminal key codes are not extensive, more needs to be added.
19 * This version was created on Debian GNU/Linux 2.x.
Denis Vlasenko78ff8192008-06-28 21:03:43 +000020 * Delete, Backspace, Home, End, and the arrow keys were tested
21 * to work in an Xterm and console. Ctrl-A also works as Home.
22 * Ctrl-E also works as End.
23 *
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010024 * The following readline-like commands are not implemented:
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010025 * CTL-t -- Transpose two characters
26 *
Denis Vlasenko78ff8192008-06-28 21:03:43 +000027 * lineedit does not know that the terminal escape sequences do not
28 * take up space on the screen. The redisplay code assumes, unless
29 * told otherwise, that each character in the prompt is a printable
30 * character that takes up one character position on the screen.
31 * You need to tell lineedit that some sequences of characters
32 * in the prompt take up no screen space. Compatibly with readline,
33 * use the \[ escape to begin a sequence of non-printing characters,
34 * and the \] escape to signal the end of such a sequence. Example:
35 *
36 * PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +020037 *
38 * Unicode in PS1 is not fully supported: prompt length calulation is wrong,
39 * resulting in line wrap problems with long (multi-line) input.
Erik Andersen13456d12000-03-16 08:09:57 +000040 */
Ron Yorstonf23264b2015-05-29 11:31:40 +010041#include "busybox.h"
42#include "NUM_APPLETS.h"
Denys Vlasenko42a8fd02009-07-11 21:36:13 +020043#include "unicode.h"
Alexey Fomenko232ebaa2011-05-20 04:26:29 +020044#ifndef _POSIX_VDISABLE
45# define _POSIX_VDISABLE '\0'
46#endif
47
Glenn L McGrath475820c2004-01-22 12:42:23 +000048
Glenn L McGrath3b251852004-01-03 12:07:32 +000049#ifdef TEST
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020050# define ENABLE_FEATURE_EDITING 0
51# define ENABLE_FEATURE_TAB_COMPLETION 0
52# define ENABLE_FEATURE_USERNAME_COMPLETION 0
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020053#endif
Eric Andersen5f2c79d2001-02-16 18:36:04 +000054
Eric Andersen5165fbe2001-02-20 06:42:29 +000055
Denis Vlasenko82b39e82007-01-21 19:18:19 +000056/* Entire file (except TESTing part) sits inside this #if */
Denis Vlasenko38f63192007-01-22 09:03:07 +000057#if ENABLE_FEATURE_EDITING
Erik Andersen13456d12000-03-16 08:09:57 +000058
Denis Vlasenko82b39e82007-01-21 19:18:19 +000059
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +020060#define ENABLE_USERNAME_OR_HOMEDIR \
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +000061 (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +020062#define IF_USERNAME_OR_HOMEDIR(...)
63#if ENABLE_USERNAME_OR_HOMEDIR
64# undef IF_USERNAME_OR_HOMEDIR
65# define IF_USERNAME_OR_HOMEDIR(...) __VA_ARGS__
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +000066#endif
Eric Andersen5f2c79d2001-02-16 18:36:04 +000067
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020068
69#undef CHAR_T
Denys Vlasenko19158a82010-03-26 14:06:56 +010070#if ENABLE_UNICODE_SUPPORT
Tomas Heinricha659b812010-04-29 13:43:39 +020071# define BB_NUL ((wchar_t)0)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020072# define CHAR_T wchar_t
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010073static bool BB_isspace(CHAR_T c) { return ((unsigned)c < 256 && isspace(c)); }
Denys Vlasenko31e2e7b2009-12-12 02:42:35 +010074# if ENABLE_FEATURE_EDITING_VI
Natanael Copa7e6f9312016-08-14 23:30:29 +020075static bool BB_isalnum_or_underscore(CHAR_T c) {
76 return ((unsigned)c < 256 && isalnum(c)) || c == '_';
77}
Denys Vlasenko31e2e7b2009-12-12 02:42:35 +010078# endif
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010079static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020080# undef isspace
81# undef isalnum
82# undef ispunct
83# undef isprint
84# define isspace isspace_must_not_be_used
85# define isalnum isalnum_must_not_be_used
86# define ispunct ispunct_must_not_be_used
87# define isprint isprint_must_not_be_used
88#else
89# define BB_NUL '\0'
90# define CHAR_T char
91# define BB_isspace(c) isspace(c)
Natanael Copa7e6f9312016-08-14 23:30:29 +020092# if ENABLE_FEATURE_EDITING_VI
Denys Vlasenko82d1c1f2017-12-31 17:30:02 +010093static bool BB_isalnum_or_underscore(CHAR_T c)
94{
Natanael Copa7e6f9312016-08-14 23:30:29 +020095 return ((unsigned)c < 256 && isalnum(c)) || c == '_';
96}
97# endif
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020098# define BB_ispunct(c) ispunct(c)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020099#endif
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200100#if ENABLE_UNICODE_PRESERVE_BROKEN
101# define unicode_mark_raw_byte(wc) ((wc) | 0x20000000)
102# define unicode_is_raw_byte(wc) ((wc) & 0x20000000)
103#else
104# define unicode_is_raw_byte(wc) 0
105#endif
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200106
107
Marek Polacek7b181072010-10-28 21:34:56 +0200108#define ESC "\033"
109
110#define SEQ_CLEAR_TILL_END_OF_SCREEN ESC"[J"
111//#define SEQ_CLEAR_TILL_END_OF_LINE ESC"[K"
Tomas Heinricha659b812010-04-29 13:43:39 +0200112
113
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000114enum {
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000115 MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0
Denis Vlasenko6b404432008-01-07 16:13:14 +0000116 ? CONFIG_FEATURE_EDITING_MAX_LEN
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000117 : 0x7ff0
118};
Robert Griebl350d26b2002-12-03 22:45:46 +0000119
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200120#if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000121static const char null_str[] ALIGN1 = "";
122#endif
Erik Andersen1d1d9502000-04-21 01:26:49 +0000123
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000124/* We try to minimize both static and stack usage. */
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000125struct lineedit_statics {
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000126 line_input_t *state;
Erik Andersen8ea7d8c2000-05-20 00:40:08 +0000127
Denys Vlasenkobff71d32016-11-27 22:25:07 +0100128 unsigned cmdedit_termw; /* = 80; */ /* actual terminal width */
Mark Whitley4e338752001-01-26 20:42:23 +0000129
Denys Vlasenko020f4062009-05-17 16:44:54 +0200130 unsigned cmdedit_x; /* real x (col) terminal position */
131 unsigned cmdedit_y; /* pseudoreal y (row) terminal position */
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200132 unsigned cmdedit_prmt_len; /* on-screen length of last/sole prompt line */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000133
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000134 unsigned cursor;
Denys Vlasenko2f3f09c2009-09-29 00:00:12 +0200135 int command_len; /* must be signed */
136 /* signed maxsize: we want x in "if (x > S.maxsize)"
Denys Vlasenko044b1802009-07-12 02:50:35 +0200137 * to _not_ be promoted to unsigned */
138 int maxsize;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200139 CHAR_T *command_ps;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000140
141 const char *cmdedit_prompt;
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200142 const char *prompt_last_line; /* last/sole prompt line */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000143
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200144#if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000145 char *user_buf;
146 char *home_pwd_buf; /* = (char*)null_str; */
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000147#endif
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000148
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000149#if ENABLE_FEATURE_TAB_COMPLETION
150 char **matches;
151 unsigned num_matches;
152#endif
153
Ron Yorston23286902018-02-25 20:09:54 +0100154#if ENABLE_FEATURE_EDITING_WINCH
Denys Vlasenkobff71d32016-11-27 22:25:07 +0100155 unsigned SIGWINCH_saved;
156 volatile unsigned SIGWINCH_count;
157 volatile smallint ok_to_redraw;
Ron Yorston23286902018-02-25 20:09:54 +0100158#endif
Denys Vlasenkobff71d32016-11-27 22:25:07 +0100159
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000160#if ENABLE_FEATURE_EDITING_VI
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200161# define DELBUFSIZ 128
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000162 smallint newdelflag; /* whether delbuf should be reused yet */
Denys Vlasenkobff71d32016-11-27 22:25:07 +0100163 CHAR_T *delptr;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200164 CHAR_T delbuf[DELBUFSIZ]; /* a place to store deleted characters */
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000165#endif
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +0100166#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
Denys Vlasenkod83bbf42009-10-27 10:47:49 +0100167 smallint sent_ESC_br6n;
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +0100168#endif
Denys Vlasenkobff71d32016-11-27 22:25:07 +0100169
Ron Yorston23286902018-02-25 20:09:54 +0100170#if ENABLE_FEATURE_EDITING_WINCH
Denys Vlasenkobff71d32016-11-27 22:25:07 +0100171 /* Largish struct, keeping it last results in smaller code */
172 struct sigaction SIGWINCH_handler;
Ron Yorston23286902018-02-25 20:09:54 +0100173#endif
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000174};
175
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000176/* See lineedit_ptr_hack.c */
177extern struct lineedit_statics *const lineedit_ptr_to_statics;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000178
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000179#define S (*lineedit_ptr_to_statics)
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000180#define state (S.state )
181#define cmdedit_termw (S.cmdedit_termw )
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000182#define cmdedit_x (S.cmdedit_x )
183#define cmdedit_y (S.cmdedit_y )
184#define cmdedit_prmt_len (S.cmdedit_prmt_len)
185#define cursor (S.cursor )
186#define command_len (S.command_len )
187#define command_ps (S.command_ps )
188#define cmdedit_prompt (S.cmdedit_prompt )
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200189#define prompt_last_line (S.prompt_last_line)
Denis Vlasenkof7be20e2007-12-24 14:09:19 +0000190#define user_buf (S.user_buf )
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000191#define home_pwd_buf (S.home_pwd_buf )
192#define matches (S.matches )
193#define num_matches (S.num_matches )
194#define delptr (S.delptr )
195#define newdelflag (S.newdelflag )
196#define delbuf (S.delbuf )
197
198#define INIT_S() do { \
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000199 (*(struct lineedit_statics**)&lineedit_ptr_to_statics) = xzalloc(sizeof(S)); \
Denis Vlasenko574f2f42008-02-27 18:41:59 +0000200 barrier(); \
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000201 cmdedit_termw = 80; \
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200202 IF_USERNAME_OR_HOMEDIR(home_pwd_buf = (char*)null_str;) \
Shawn J. Goff46031da2013-02-27 18:30:05 +0100203 IF_FEATURE_EDITING_VI(delptr = delbuf;) \
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000204} while (0)
Alexey Fomenko232ebaa2011-05-20 04:26:29 +0200205
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000206static void deinit_S(void)
207{
208#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000209 /* This one is allocated only if FANCY_PROMPT is on
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200210 * (otherwise it points to verbatim prompt (NOT malloced)) */
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000211 free((char*)cmdedit_prompt);
212#endif
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200213#if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000214 free(user_buf);
215 if (home_pwd_buf != null_str)
216 free(home_pwd_buf);
217#endif
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000218 free(lineedit_ptr_to_statics);
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000219}
220#define DEINIT_S() deinit_S()
221
Denis Vlasenko2c844952008-04-25 18:44:35 +0000222
Denys Vlasenko19158a82010-03-26 14:06:56 +0100223#if ENABLE_UNICODE_SUPPORT
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200224static size_t load_string(const char *src)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200225{
Denys Vlasenko353680a2011-03-27 01:18:07 +0100226 if (unicode_status == UNICODE_ON) {
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200227 ssize_t len = mbstowcs(command_ps, src, S.maxsize - 1);
Denys Vlasenko353680a2011-03-27 01:18:07 +0100228 if (len < 0)
229 len = 0;
230 command_ps[len] = BB_NUL;
231 return len;
232 } else {
233 unsigned i = 0;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200234 while (src[i] && i < S.maxsize - 1) {
235 command_ps[i] = src[i];
Denys Vlasenko353680a2011-03-27 01:18:07 +0100236 i++;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200237 }
238 command_ps[i] = BB_NUL;
Denys Vlasenko353680a2011-03-27 01:18:07 +0100239 return i;
240 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200241}
Tomas Heinricha659b812010-04-29 13:43:39 +0200242static unsigned save_string(char *dst, unsigned maxsize)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200243{
Denys Vlasenko353680a2011-03-27 01:18:07 +0100244 if (unicode_status == UNICODE_ON) {
Denys Vlasenko94043e82010-05-11 14:49:13 +0200245# if !ENABLE_UNICODE_PRESERVE_BROKEN
Denys Vlasenko353680a2011-03-27 01:18:07 +0100246 ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
247 if (len < 0)
248 len = 0;
249 dst[len] = '\0';
250 return len;
Denys Vlasenko94043e82010-05-11 14:49:13 +0200251# else
Denys Vlasenko353680a2011-03-27 01:18:07 +0100252 unsigned dstpos = 0;
253 unsigned srcpos = 0;
Tomas Heinricha659b812010-04-29 13:43:39 +0200254
Denys Vlasenko353680a2011-03-27 01:18:07 +0100255 maxsize--;
256 while (dstpos < maxsize) {
257 wchar_t wc;
258 int n = srcpos;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200259
Denys Vlasenko353680a2011-03-27 01:18:07 +0100260 /* Convert up to 1st invalid byte (or up to end) */
261 while ((wc = command_ps[srcpos]) != BB_NUL
262 && !unicode_is_raw_byte(wc)
263 ) {
264 srcpos++;
265 }
266 command_ps[srcpos] = BB_NUL;
267 n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos);
268 if (n < 0) /* should not happen */
269 break;
270 dstpos += n;
271 if (wc == BB_NUL) /* usually is */
272 break;
273
274 /* We do have invalid byte here! */
275 command_ps[srcpos] = wc; /* restore it */
Tomas Heinricha659b812010-04-29 13:43:39 +0200276 srcpos++;
Denys Vlasenko353680a2011-03-27 01:18:07 +0100277 if (dstpos == maxsize)
278 break;
279 dst[dstpos++] = (char) wc;
Tomas Heinricha659b812010-04-29 13:43:39 +0200280 }
Denys Vlasenko353680a2011-03-27 01:18:07 +0100281 dst[dstpos] = '\0';
282 return dstpos;
Denys Vlasenko94043e82010-05-11 14:49:13 +0200283# endif
Denys Vlasenko353680a2011-03-27 01:18:07 +0100284 } else {
285 unsigned i = 0;
286 while ((dst[i] = command_ps[i]) != 0)
287 i++;
288 return i;
289 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200290}
291/* I thought just fputwc(c, stdout) would work. But no... */
292static void BB_PUTCHAR(wchar_t c)
293{
Denys Vlasenko353680a2011-03-27 01:18:07 +0100294 if (unicode_status == UNICODE_ON) {
295 char buf[MB_CUR_MAX + 1];
296 mbstate_t mbst = { 0 };
297 ssize_t len = wcrtomb(buf, c, &mbst);
298 if (len > 0) {
299 buf[len] = '\0';
300 fputs(buf, stdout);
301 }
302 } else {
303 /* In this case, c is always one byte */
304 putchar(c);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200305 }
306}
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200307# if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
308static wchar_t adjust_width_and_validate_wc(unsigned *width_adj, wchar_t wc)
309# else
310static wchar_t adjust_width_and_validate_wc(wchar_t wc)
311# define adjust_width_and_validate_wc(width_adj, wc) \
312 ((*(width_adj))++, adjust_width_and_validate_wc(wc))
313# endif
314{
315 int w = 1;
316
317 if (unicode_status == UNICODE_ON) {
Denys Vlasenko26e2c1d2010-05-16 21:15:03 +0200318 if (wc > CONFIG_LAST_SUPPORTED_WCHAR) {
319 /* note: also true for unicode_is_raw_byte(wc) */
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200320 goto subst;
321 }
322 w = wcwidth(wc);
323 if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0)
324 || (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0)
325 || (!ENABLE_UNICODE_WIDE_WCHARS && w > 1)
326 ) {
327 subst:
328 w = 1;
329 wc = CONFIG_SUBST_WCHAR;
330 }
331 }
332
333# if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
334 *width_adj += w;
335#endif
336 return wc;
337}
338#else /* !UNICODE */
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200339static size_t load_string(const char *src)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200340{
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200341 safe_strncpy(command_ps, src, S.maxsize);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200342 return strlen(command_ps);
343}
Denys Vlasenko9038d6f2009-07-15 20:02:19 +0200344# if ENABLE_FEATURE_TAB_COMPLETION
Tomas Heinricha659b812010-04-29 13:43:39 +0200345static void save_string(char *dst, unsigned maxsize)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200346{
347 safe_strncpy(dst, command_ps, maxsize);
348}
Denys Vlasenko7dd0ce42009-07-15 18:27:47 +0200349# endif
350# define BB_PUTCHAR(c) bb_putchar(c)
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200351/* Should never be called: */
352int adjust_width_and_validate_wc(unsigned *width_adj, int wc);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200353#endif
354
355
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000356/* Put 'command_ps[cursor]', cursor++.
357 * Advance cursor on screen. If we reached right margin, scroll text up
358 * and remove terminal margin effect by printing 'next_char' */
Denis Vlasenko2c844952008-04-25 18:44:35 +0000359#define HACK_FOR_WRONG_WIDTH 1
Denys Vlasenko94043e82010-05-11 14:49:13 +0200360static void put_cur_glyph_and_inc_cursor(void)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000361{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200362 CHAR_T c = command_ps[cursor];
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200363 unsigned width = 0;
364 int ofs_to_right;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000365
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200366 if (c == BB_NUL) {
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000367 /* erase character after end of input string */
368 c = ' ';
Denys Vlasenko94043e82010-05-11 14:49:13 +0200369 } else {
370 /* advance cursor only if we aren't at the end yet */
371 cursor++;
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200372 if (unicode_status == UNICODE_ON) {
373 IF_UNICODE_WIDE_WCHARS(width = cmdedit_x;)
374 c = adjust_width_and_validate_wc(&cmdedit_x, c);
375 IF_UNICODE_WIDE_WCHARS(width = cmdedit_x - width;)
376 } else {
377 cmdedit_x++;
378 }
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000379 }
Denys Vlasenko94043e82010-05-11 14:49:13 +0200380
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200381 ofs_to_right = cmdedit_x - cmdedit_termw;
382 if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right <= 0) {
383 /* c fits on this line */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200384 BB_PUTCHAR(c);
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000385 }
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200386
387 if (ofs_to_right >= 0) {
388 /* we go to the next line */
Denis Vlasenko2c844952008-04-25 18:44:35 +0000389#if HACK_FOR_WRONG_WIDTH
390 /* This works better if our idea of term width is wrong
391 * and it is actually wider (often happens on serial lines).
392 * Printing CR,LF *forces* cursor to next line.
393 * OTOH if terminal width is correct AND terminal does NOT
394 * have automargin (IOW: it is moving cursor to next line
395 * by itself (which is wrong for VT-10x terminals)),
396 * this will break things: there will be one extra empty line */
397 puts("\r"); /* + implicit '\n' */
398#else
Denys Vlasenko94043e82010-05-11 14:49:13 +0200399 /* VT-10x terminals don't wrap cursor to next line when last char
400 * on the line is printed - cursor stays "over" this char.
401 * Need to print _next_ char too (first one to appear on next line)
402 * to make cursor move down to next line.
403 */
404 /* Works ok only if cmdedit_termw is correct. */
405 c = command_ps[cursor];
406 if (c == BB_NUL)
407 c = ' ';
408 BB_PUTCHAR(c);
Denis Vlasenko4daad902007-09-27 10:20:47 +0000409 bb_putchar('\b');
Denis Vlasenko2c844952008-04-25 18:44:35 +0000410#endif
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200411 cmdedit_y++;
412 if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right == 0) {
413 width = 0;
414 } else { /* ofs_to_right > 0 */
415 /* wide char c didn't fit on prev line */
416 BB_PUTCHAR(c);
417 }
418 cmdedit_x = width;
Mark Whitley4e338752001-01-26 20:42:23 +0000419 }
Erik Andersen13456d12000-03-16 08:09:57 +0000420}
421
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000422/* Move to end of line (by printing all chars till the end) */
Denys Vlasenko94043e82010-05-11 14:49:13 +0200423static void put_till_end_and_adv_cursor(void)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000424{
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000425 while (cursor < command_len)
Denys Vlasenko94043e82010-05-11 14:49:13 +0200426 put_cur_glyph_and_inc_cursor();
Mark Whitley4e338752001-01-26 20:42:23 +0000427}
428
429/* Go to the next line */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000430static void goto_new_line(void)
431{
Denys Vlasenko94043e82010-05-11 14:49:13 +0200432 put_till_end_and_adv_cursor();
Denys Vlasenkof5018da2018-04-06 17:58:21 +0200433 /* "cursor == 0" is only if prompt is "" and user input is empty */
434 if (cursor == 0 || cmdedit_x != 0)
Denis Vlasenko4daad902007-09-27 10:20:47 +0000435 bb_putchar('\n');
Mark Whitley4e338752001-01-26 20:42:23 +0000436}
437
Rob Landley88621d72006-08-29 19:41:06 +0000438static void beep(void)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000439{
Denis Vlasenko4daad902007-09-27 10:20:47 +0000440 bb_putchar('\007');
Erik Andersen13456d12000-03-16 08:09:57 +0000441}
442
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200443/* Full or last/sole prompt line, reset edit cursor, calculate terminal cursor.
444 * cmdedit_y is always calculated for the last/sole prompt line.
445 */
446static void put_prompt_custom(bool is_full)
Denys Vlasenko248c3242010-05-17 00:45:44 +0200447{
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200448 fputs((is_full ? cmdedit_prompt : prompt_last_line), stdout);
Denys Vlasenko248c3242010-05-17 00:45:44 +0200449 cursor = 0;
Denys Vlasenkobff71d32016-11-27 22:25:07 +0100450 cmdedit_y = cmdedit_prmt_len / cmdedit_termw; /* new quasireal y */
451 cmdedit_x = cmdedit_prmt_len % cmdedit_termw;
Denys Vlasenko248c3242010-05-17 00:45:44 +0200452}
453
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200454#define put_prompt_last_line() put_prompt_custom(0)
455#define put_prompt() put_prompt_custom(1)
456
Eric Andersenaff114c2004-04-14 17:51:38 +0000457/* Move back one character */
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000458/* (optimized for slow terminals) */
459static void input_backward(unsigned num)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000460{
461 if (num > cursor)
462 num = cursor;
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200463 if (num == 0)
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000464 return;
465 cursor -= num;
Erik Andersen13456d12000-03-16 08:09:57 +0000466
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200467 if ((ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS)
468 && unicode_status == UNICODE_ON
469 ) {
470 /* correct NUM to be equal to _screen_ width */
471 int n = num;
472 num = 0;
473 while (--n >= 0)
474 adjust_width_and_validate_wc(&num, command_ps[cursor + n]);
475 if (num == 0)
476 return;
477 }
478
Denis Vlasenkob267ed92008-05-25 21:52:03 +0000479 if (cmdedit_x >= num) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000480 cmdedit_x -= num;
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000481 if (num <= 4) {
Denis Vlasenko6f043912008-02-18 22:28:03 +0000482 /* This is longer by 5 bytes on x86.
Denis Vlasenkob267ed92008-05-25 21:52:03 +0000483 * Also gets miscompiled for ARM users
484 * (busybox.net/bugs/view.php?id=2274).
Denis Vlasenko6f043912008-02-18 22:28:03 +0000485 * printf(("\b\b\b\b" + 4) - num);
486 * return;
487 */
488 do {
489 bb_putchar('\b');
490 } while (--num);
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000491 return;
492 }
Marek Polacek7b181072010-10-28 21:34:56 +0200493 printf(ESC"[%uD", num);
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000494 return;
Erik Andersen13456d12000-03-16 08:09:57 +0000495 }
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000496
497 /* Need to go one or more lines up */
Denys Vlasenko248c3242010-05-17 00:45:44 +0200498 if (ENABLE_UNICODE_WIDE_WCHARS) {
499 /* With wide chars, it is hard to "backtrack"
500 * and reliably figure out where to put cursor.
501 * Example (<> is a wide char; # is an ordinary char, _ cursor):
502 * |prompt: <><> |
503 * |<><><><><><> |
504 * |_ |
505 * and user presses left arrow. num = 1, cmdedit_x = 0,
506 * We need to go up one line, and then - how do we know that
507 * we need to go *10* positions to the right? Because
508 * |prompt: <>#<>|
509 * |<><><>#<><><>|
510 * |_ |
511 * in this situation we need to go *11* positions to the right.
512 *
513 * A simpler thing to do is to redraw everything from the start
514 * up to new cursor position (which is already known):
515 */
516 unsigned sv_cursor;
Denys Vlasenko9963fe32010-05-17 04:05:53 +0200517 /* go to 1st column; go up to first line */
Marek Polacek7b181072010-10-28 21:34:56 +0200518 printf("\r" ESC"[%uA", cmdedit_y);
Denys Vlasenko248c3242010-05-17 00:45:44 +0200519 cmdedit_y = 0;
520 sv_cursor = cursor;
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200521 put_prompt_last_line(); /* sets cursor to 0 */
Denys Vlasenko248c3242010-05-17 00:45:44 +0200522 while (cursor < sv_cursor)
523 put_cur_glyph_and_inc_cursor();
524 } else {
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200525 int lines_up;
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200526 /* num = chars to go back from the beginning of current line: */
Denys Vlasenko248c3242010-05-17 00:45:44 +0200527 num -= cmdedit_x;
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200528 /* num=1...w: one line up, w+1...2w: two, etc: */
Denys Vlasenkobff71d32016-11-27 22:25:07 +0100529 lines_up = 1 + (num - 1) / cmdedit_termw;
530 cmdedit_x = (cmdedit_termw * cmdedit_y - num) % cmdedit_termw;
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200531 cmdedit_y -= lines_up;
532 /* go to 1st column; go up */
Marek Polacek7b181072010-10-28 21:34:56 +0200533 printf("\r" ESC"[%uA", lines_up);
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200534 /* go to correct column.
Denys Vlasenkobbf1aa12010-05-17 12:33:13 +0200535 * xterm, konsole, Linux VT interpret 0 as 1 below! wow.
536 * need to *make sure* we skip it if cmdedit_x == 0 */
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200537 if (cmdedit_x)
Marek Polacek7b181072010-10-28 21:34:56 +0200538 printf(ESC"[%uC", cmdedit_x);
Denis Vlasenkob267ed92008-05-25 21:52:03 +0000539 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000540}
541
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200542/* See redraw and draw_full below */
543static void draw_custom(int y, int back_cursor, bool is_full)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000544{
Denys Vlasenko9963fe32010-05-17 04:05:53 +0200545 if (y > 0) /* up y lines */
Marek Polacek7b181072010-10-28 21:34:56 +0200546 printf(ESC"[%uA", y);
Denis Vlasenko4daad902007-09-27 10:20:47 +0000547 bb_putchar('\r');
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200548 put_prompt_custom(is_full);
Denys Vlasenko94043e82010-05-11 14:49:13 +0200549 put_till_end_and_adv_cursor();
550 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000551 input_backward(back_cursor);
552}
553
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +0200554/* Move y lines up, draw last/sole prompt line, editor line[s], and clear tail.
555 * goal: redraw the prompt+input+cursor in-place, overwriting the previous */
556#define redraw(y, back_cursor) draw_custom((y), (back_cursor), 0)
557
558/* Like above, but without moving up, and while using all the prompt lines.
559 * goal: draw a full prompt+input+cursor unrelated to a previous position.
560 * note: cmdedit_y always ends up relating to the last/sole prompt line */
561#define draw_full(back_cursor) draw_custom(0, (back_cursor), 1)
562
Paul Fox3f11b1b2005-08-04 19:04:46 +0000563/* Delete the char in front of the cursor, optionally saving it
564 * for later putback */
Denis Vlasenko85c24712008-03-17 09:04:04 +0000565#if !ENABLE_FEATURE_EDITING_VI
566static void input_delete(void)
567#define input_delete(save) input_delete()
568#else
Paul Fox3f11b1b2005-08-04 19:04:46 +0000569static void input_delete(int save)
Denis Vlasenko85c24712008-03-17 09:04:04 +0000570#endif
Erik Andersenf0657d32000-04-12 17:49:52 +0000571{
Mark Whitley4e338752001-01-26 20:42:23 +0000572 int j = cursor;
Erik Andersena2685732000-04-09 18:27:46 +0000573
Denis Vlasenko77ad97f2008-05-13 02:27:31 +0000574 if (j == (int)command_len)
Erik Andersenf0657d32000-04-12 17:49:52 +0000575 return;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000576
Denis Vlasenko38f63192007-01-22 09:03:07 +0000577#if ENABLE_FEATURE_EDITING_VI
Paul Fox3f11b1b2005-08-04 19:04:46 +0000578 if (save) {
579 if (newdelflag) {
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000580 delptr = delbuf;
Paul Fox3f11b1b2005-08-04 19:04:46 +0000581 newdelflag = 0;
582 }
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000583 if ((delptr - delbuf) < DELBUFSIZ)
584 *delptr++ = command_ps[j];
Paul Fox3f11b1b2005-08-04 19:04:46 +0000585 }
586#endif
587
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200588 memmove(command_ps + j, command_ps + j + 1,
Denys Vlasenko9531f7d2009-07-16 14:33:16 +0200589 /* (command_len + 1 [because of NUL]) - (j + 1)
590 * simplified into (command_len - j) */
591 (command_len - j) * sizeof(command_ps[0]));
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000592 command_len--;
Denys Vlasenko94043e82010-05-11 14:49:13 +0200593 put_till_end_and_adv_cursor();
594 /* Last char is still visible, erase it (and more) */
595 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
Eric Andersenc470f442003-07-28 09:56:35 +0000596 input_backward(cursor - j); /* back to old pos cursor */
Erik Andersenf0657d32000-04-12 17:49:52 +0000597}
598
Denis Vlasenko38f63192007-01-22 09:03:07 +0000599#if ENABLE_FEATURE_EDITING_VI
Paul Fox3f11b1b2005-08-04 19:04:46 +0000600static void put(void)
601{
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000602 int ocursor;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000603 int j = delptr - delbuf;
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000604
Paul Fox3f11b1b2005-08-04 19:04:46 +0000605 if (j == 0)
606 return;
607 ocursor = cursor;
608 /* open hole and then fill it */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200609 memmove(command_ps + cursor + j, command_ps + cursor,
610 (command_len - cursor + 1) * sizeof(command_ps[0]));
611 memcpy(command_ps + cursor, delbuf, j * sizeof(command_ps[0]));
Denis Vlasenko253ce002007-01-22 08:34:44 +0000612 command_len += j;
Denys Vlasenko94043e82010-05-11 14:49:13 +0200613 put_till_end_and_adv_cursor();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000614 input_backward(cursor - ocursor - j + 1); /* at end of new text */
Paul Fox3f11b1b2005-08-04 19:04:46 +0000615}
616#endif
617
Mark Whitley4e338752001-01-26 20:42:23 +0000618/* Delete the char in back of the cursor */
619static void input_backspace(void)
620{
621 if (cursor > 0) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000622 input_backward(1);
Paul Fox3f11b1b2005-08-04 19:04:46 +0000623 input_delete(0);
Mark Whitley4e338752001-01-26 20:42:23 +0000624 }
625}
626
Eric Andersenaff114c2004-04-14 17:51:38 +0000627/* Move forward one character */
Mark Whitley4e338752001-01-26 20:42:23 +0000628static void input_forward(void)
Erik Andersenf0657d32000-04-12 17:49:52 +0000629{
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000630 if (cursor < command_len)
Denys Vlasenko94043e82010-05-11 14:49:13 +0200631 put_cur_glyph_and_inc_cursor();
Erik Andersenf0657d32000-04-12 17:49:52 +0000632}
633
Denis Vlasenko38f63192007-01-22 09:03:07 +0000634#if ENABLE_FEATURE_TAB_COMPLETION
Mark Whitley4e338752001-01-26 20:42:23 +0000635
Mike Shalf3763032010-11-22 03:49:18 +0100636//FIXME:
637//needs to be more clever: currently it thinks that "foo\ b<TAB>
638//matches the file named "foo bar", which is untrue.
639//Also, perhaps "foo b<TAB> needs to complete to "foo bar" <cursor>,
640//not "foo bar <cursor>...
641
Denis Vlasenko5592fac2007-01-21 19:19:46 +0000642static void free_tab_completion_data(void)
643{
644 if (matches) {
645 while (num_matches)
646 free(matches[--num_matches]);
647 free(matches);
648 matches = NULL;
649 }
650}
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +0000651
Denis Vlasenkod56b47f2006-12-21 22:24:46 +0000652static void add_match(char *matched)
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +0000653{
Denys Vlasenkoc3797d42017-11-07 18:09:29 +0100654 unsigned char *p = (unsigned char*)matched;
655 while (*p) {
656 /* ESC attack fix: drop any string with control chars */
657 if (*p < ' '
658 || (!ENABLE_UNICODE_SUPPORT && *p >= 0x7f)
659 || (ENABLE_UNICODE_SUPPORT && *p == 0x7f)
660 ) {
661 free(matched);
662 return;
663 }
664 p++;
665 }
Denis Vlasenkodeeed592008-07-08 05:14:36 +0000666 matches = xrealloc_vector(matches, 4, num_matches);
667 matches[num_matches] = matched;
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +0000668 num_matches++;
669}
670
Mike Shalf3763032010-11-22 03:49:18 +0100671# if ENABLE_FEATURE_USERNAME_COMPLETION
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200672/* Replace "~user/..." with "/homedir/...".
673 * The parameter is malloced, free it or return it
674 * unchanged if no user is matched.
675 */
676static char *username_path_completion(char *ud)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000677{
678 struct passwd *entry;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200679 char *tilde_name = ud;
680 char *home = NULL;
681
682 ud++; /* skip ~ */
683 if (*ud == '/') { /* "~/..." */
684 home = home_pwd_buf;
685 } else {
686 /* "~user/..." */
687 ud = strchr(ud, '/');
688 *ud = '\0'; /* "~user" */
689 entry = getpwnam(tilde_name + 1);
690 *ud = '/'; /* restore "~user/..." */
691 if (entry)
692 home = entry->pw_dir;
693 }
694 if (home) {
695 ud = concat_path_file(home, ud);
696 free(tilde_name);
697 tilde_name = ud;
698 }
699 return tilde_name;
700}
701
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200702/* ~use<tab> - find all users with this prefix.
703 * Return the length of the prefix used for matching.
704 */
705static NOINLINE unsigned complete_username(const char *ud)
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200706{
Denys Vlasenko23cfaab2015-02-07 21:21:02 +0100707 struct passwd *pw;
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200708 unsigned userlen;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000709
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200710 ud++; /* skip ~ */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000711 userlen = strlen(ud);
712
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200713 setpwent();
Denys Vlasenko23cfaab2015-02-07 21:21:02 +0100714 while ((pw = getpwent()) != NULL) {
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200715 /* Null usernames should result in all users as possible completions. */
Denys Vlasenko8dff01d2015-03-12 17:48:34 +0100716 if (/* !ud[0] || */ is_prefixed_with(pw->pw_name, ud)) {
Denys Vlasenko23cfaab2015-02-07 21:21:02 +0100717 add_match(xasprintf("~%s/", pw->pw_name));
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000718 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000719 }
Denys Vlasenko23cfaab2015-02-07 21:21:02 +0100720 endpwent(); /* don't keep password file open */
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200721
722 return 1 + userlen;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000723}
Mike Shalf3763032010-11-22 03:49:18 +0100724# endif /* FEATURE_USERNAME_COMPLETION */
Mark Whitley4e338752001-01-26 20:42:23 +0000725
726enum {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000727 FIND_EXE_ONLY = 0,
728 FIND_DIR_ONLY = 1,
Mark Whitley4e338752001-01-26 20:42:23 +0000729 FIND_FILE_ONLY = 2,
730};
Erik Andersen1dbe3402000-03-19 10:46:06 +0000731
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200732static int path_parse(char ***p)
Mark Whitley4e338752001-01-26 20:42:23 +0000733{
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000734 int npth;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000735 const char *pth;
Denis Vlasenko253ce002007-01-22 08:34:44 +0000736 char *tmp;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000737 char **res;
Mark Whitley4e338752001-01-26 20:42:23 +0000738
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000739 if (state->flags & WITH_PATH_LOOKUP)
740 pth = state->path_lookup;
741 else
742 pth = getenv("PATH");
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200743
744 /* PATH="" or PATH=":"? */
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000745 if (!pth || !pth[0] || LONE_CHAR(pth, ':'))
746 return 1;
Mark Whitley4e338752001-01-26 20:42:23 +0000747
Denis Vlasenko253ce002007-01-22 08:34:44 +0000748 tmp = (char*)pth;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000749 npth = 1; /* path component count */
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000750 while (1) {
Mark Whitley4e338752001-01-26 20:42:23 +0000751 tmp = strchr(tmp, ':');
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000752 if (!tmp)
Mark Whitley4e338752001-01-26 20:42:23 +0000753 break;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200754 tmp++;
755 if (*tmp == '\0')
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000756 break; /* :<empty> */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000757 npth++;
Mark Whitley4e338752001-01-26 20:42:23 +0000758 }
759
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200760 *p = res = xmalloc(npth * sizeof(res[0]));
Denis Vlasenko253ce002007-01-22 08:34:44 +0000761 res[0] = tmp = xstrdup(pth);
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000762 npth = 1;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000763 while (1) {
Mark Whitley4e338752001-01-26 20:42:23 +0000764 tmp = strchr(tmp, ':');
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000765 if (!tmp)
Mark Whitley4e338752001-01-26 20:42:23 +0000766 break;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000767 *tmp++ = '\0'; /* ':' -> '\0' */
768 if (*tmp == '\0')
769 break; /* :<empty> */
770 res[npth++] = tmp;
Mark Whitley4e338752001-01-26 20:42:23 +0000771 }
Mark Whitley4e338752001-01-26 20:42:23 +0000772 return npth;
773}
774
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200775/* Complete command, directory or file name.
776 * Return the length of the prefix used for matching.
777 */
778static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000779{
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000780 char *path1[1];
781 char **paths = path1;
782 int npaths;
783 int i;
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200784 unsigned pf_len;
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200785 const char *pfind;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200786 char *dirbuf = NULL;
Mark Whitley4e338752001-01-26 20:42:23 +0000787
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000788 npaths = 1;
Denis Vlasenkoab2aea42007-01-29 22:51:58 +0000789 path1[0] = (char*)".";
Mark Whitley4e338752001-01-26 20:42:23 +0000790
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200791 pfind = strrchr(command, '/');
792 if (!pfind) {
793 if (type == FIND_EXE_ONLY)
794 npaths = path_parse(&paths);
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000795 pfind = command;
Mark Whitley4e338752001-01-26 20:42:23 +0000796 } else {
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000797 /* point to 'l' in "..../last_component" */
798 pfind++;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200799 /* dirbuf = ".../.../.../" */
800 dirbuf = xstrndup(command, pfind - command);
Mike Shalf3763032010-11-22 03:49:18 +0100801# if ENABLE_FEATURE_USERNAME_COMPLETION
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200802 if (dirbuf[0] == '~') /* ~/... or ~user/... */
803 dirbuf = username_path_completion(dirbuf);
Mike Shalf3763032010-11-22 03:49:18 +0100804# endif
Denys Vlasenko7063e862010-09-02 12:44:39 +0200805 path1[0] = dirbuf;
Mark Whitley4e338752001-01-26 20:42:23 +0000806 }
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200807 pf_len = strlen(pfind);
Erik Andersenc7c634b2000-03-19 05:28:55 +0000808
Ron Yorston37788982018-11-17 17:48:14 +0000809# if ENABLE_FEATURE_SH_STANDALONE && NUM_APPLETS != 1
Denys Vlasenko13360522016-10-24 01:25:05 +0200810 if (type == FIND_EXE_ONLY && !dirbuf) {
Ron Yorston37788982018-11-17 17:48:14 +0000811 const char *p = applet_names;
812
Ron Yorston2b919582016-04-08 11:57:20 +0100813 while (*p) {
Ron Yorstonf23264b2015-05-29 11:31:40 +0100814 if (strncmp(pfind, p, pf_len) == 0)
815 add_match(xstrdup(p));
Ron Yorston37788982018-11-17 17:48:14 +0000816 while (*p++ != '\0')
Ron Yorston2b919582016-04-08 11:57:20 +0100817 continue;
Ron Yorstonf23264b2015-05-29 11:31:40 +0100818 }
819 }
Denys Vlasenkof128bdb2017-07-29 00:59:24 +0200820# endif
Ron Yorstonf23264b2015-05-29 11:31:40 +0100821
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000822 for (i = 0; i < npaths; i++) {
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200823 DIR *dir;
824 struct dirent *next;
825 struct stat st;
826 char *found;
827
Mark Whitley4e338752001-01-26 20:42:23 +0000828 dir = opendir(paths[i]);
Denis Vlasenkob5202712008-04-24 04:42:52 +0000829 if (!dir)
830 continue; /* don't print an error */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000831
832 while ((next = readdir(dir)) != NULL) {
Denys Vlasenko39263632010-09-03 14:11:08 +0200833 unsigned len;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200834 const char *name_found = next->d_name;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000835
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200836 /* .../<tab>: bash 3.2.0 shows dotfiles, but not . and .. */
837 if (!pfind[0] && DOT_OR_DOTDOT(name_found))
Mark Whitley4e338752001-01-26 20:42:23 +0000838 continue;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200839 /* match? */
Denys Vlasenko8dff01d2015-03-12 17:48:34 +0100840 if (!is_prefixed_with(name_found, pfind))
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200841 continue; /* no */
842
843 found = concat_path_file(paths[i], name_found);
Denis Vlasenkob5202712008-04-24 04:42:52 +0000844 /* NB: stat() first so that we see is it a directory;
845 * but if that fails, use lstat() so that
846 * we still match dangling links */
847 if (stat(found, &st) && lstat(found, &st))
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200848 goto cont; /* hmm, remove in progress? */
Denis Vlasenkod56b47f2006-12-21 22:24:46 +0000849
Denys Vlasenko39263632010-09-03 14:11:08 +0200850 /* Save only name */
851 len = strlen(name_found);
852 found = xrealloc(found, len + 2); /* +2: for slash and NUL */
853 strcpy(found, name_found);
Denis Vlasenkod56b47f2006-12-21 22:24:46 +0000854
Mark Whitley4e338752001-01-26 20:42:23 +0000855 if (S_ISDIR(st.st_mode)) {
Denys Vlasenko39263632010-09-03 14:11:08 +0200856 /* name is a directory, add slash */
857 found[len] = '/';
858 found[len + 1] = '\0';
Mark Whitley4e338752001-01-26 20:42:23 +0000859 } else {
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200860 /* skip files if looking for dirs only (example: cd) */
Eric Andersenc470f442003-07-28 09:56:35 +0000861 if (type == FIND_DIR_ONLY)
Eric Andersene5dfced2001-04-09 22:48:12 +0000862 goto cont;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000863 }
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200864 /* add it to the list */
Denis Vlasenkod56b47f2006-12-21 22:24:46 +0000865 add_match(found);
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +0000866 continue;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000867 cont:
Eric Andersene5dfced2001-04-09 22:48:12 +0000868 free(found);
Erik Andersen1dbe3402000-03-19 10:46:06 +0000869 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000870 closedir(dir);
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200871 } /* for every path */
872
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000873 if (paths != path1) {
Denis Vlasenkob5202712008-04-24 04:42:52 +0000874 free(paths[0]); /* allocated memory is only in first member */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000875 free(paths);
876 }
Denys Vlasenko39263632010-09-03 14:11:08 +0200877 free(dirbuf);
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200878
879 return pf_len;
Erik Andersen6273f652000-03-17 01:12:41 +0000880}
Erik Andersenf0657d32000-04-12 17:49:52 +0000881
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200882/* build_match_prefix:
Denys Vlasenko76939e72010-09-03 14:09:24 +0200883 * On entry, match_buf contains everything up to cursor at the moment <tab>
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200884 * was pressed. This function looks at it, figures out what part of it
885 * constitutes the command/file/directory prefix to use for completion,
Denys Vlasenko76939e72010-09-03 14:09:24 +0200886 * and rewrites match_buf to contain only that part.
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200887 */
Denys Vlasenko76939e72010-09-03 14:09:24 +0200888#define dbg_bmp 0
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200889/* Helpers: */
890/* QUOT is used on elements of int_buf[], which are bytes,
891 * not Unicode chars. Therefore it works correctly even in Unicode mode.
892 */
893#define QUOT (UCHAR_MAX+1)
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200894static void remove_chunk(int16_t *int_buf, int beg, int end)
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200895{
896 /* beg must be <= end */
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200897 if (beg == end)
898 return;
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200899
900 while ((int_buf[beg] = int_buf[end]) != 0)
901 beg++, end++;
902
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200903 if (dbg_bmp) {
904 int i;
905 for (i = 0; int_buf[i]; i++)
906 bb_putchar((unsigned char)int_buf[i]);
907 bb_putchar('\n');
908 }
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200909}
Denys Vlasenko76939e72010-09-03 14:09:24 +0200910/* Caller ensures that match_buf points to a malloced buffer
911 * big enough to hold strlen(match_buf)*2 + 2
912 */
913static NOINLINE int build_match_prefix(char *match_buf)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000914{
915 int i, j;
916 int command_mode;
Denys Vlasenko76939e72010-09-03 14:09:24 +0200917 int16_t *int_buf = (int16_t*)match_buf;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000918
Denys Vlasenko76939e72010-09-03 14:09:24 +0200919 if (dbg_bmp) printf("\n%s\n", match_buf);
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200920
Denys Vlasenko76939e72010-09-03 14:09:24 +0200921 /* Copy in reverse order, since they overlap */
922 i = strlen(match_buf);
923 do {
924 int_buf[i] = (unsigned char)match_buf[i];
925 i--;
926 } while (i >= 0);
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000927
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200928 /* Mark every \c as "quoted c" */
Denys Vlasenko76939e72010-09-03 14:09:24 +0200929 for (i = 0; int_buf[i]; i++) {
930 if (int_buf[i] == '\\') {
931 remove_chunk(int_buf, i, i + 1);
932 int_buf[i] |= QUOT;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000933 }
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200934 }
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200935 /* Quote-mark "chars" and 'chars', drop delimiters */
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200936 {
937 int in_quote = 0;
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200938 i = 0;
939 while (int_buf[i]) {
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200940 int cur = int_buf[i];
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200941 if (!cur)
942 break;
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200943 if (cur == '\'' || cur == '"') {
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200944 if (!in_quote || (cur == in_quote)) {
945 in_quote ^= cur;
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200946 remove_chunk(int_buf, i, i + 1);
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200947 continue;
948 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000949 }
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200950 if (in_quote)
951 int_buf[i] = cur | QUOT;
952 i++;
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200953 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000954 }
955
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200956 /* Remove everything up to command delimiters:
957 * ';' ';;' '&' '|' '&&' '||',
958 * but careful with '>&' '<&' '>|'
959 */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000960 for (i = 0; int_buf[i]; i++) {
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200961 int cur = int_buf[i];
962 if (cur == ';' || cur == '&' || cur == '|') {
963 int prev = i ? int_buf[i - 1] : 0;
964 if (cur == '&' && (prev == '>' || prev == '<')) {
965 continue;
966 } else if (cur == '|' && prev == '>') {
967 continue;
968 }
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200969 remove_chunk(int_buf, 0, i + 1 + (cur == int_buf[i + 1]));
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200970 i = -1; /* back to square 1 */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000971 }
972 }
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200973 /* Remove all `cmd` */
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +0200974 for (i = 0; int_buf[i]; i++) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000975 if (int_buf[i] == '`') {
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200976 for (j = i + 1; int_buf[j]; j++) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000977 if (int_buf[j] == '`') {
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200978 /* `cmd` should count as a word:
979 * `cmd` c<tab> should search for files c*,
980 * not commands c*. Therefore we don't drop
981 * `cmd` entirely, we replace it with single `.
982 */
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200983 remove_chunk(int_buf, i, j);
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200984 goto next;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000985 }
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200986 }
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200987 /* No closing ` - command mode, remove all up to ` */
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200988 remove_chunk(int_buf, 0, i + 1);
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200989 break;
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200990 next: ;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000991 }
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +0200992 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000993
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200994 /* Remove "cmd (" and "cmd {"
995 * Example: "if { c<tab>"
996 * In this example, c should be matched as command pfx.
997 */
998 for (i = 0; int_buf[i]; i++) {
999 if (int_buf[i] == '(' || int_buf[i] == '{') {
Denys Vlasenko9b56bf52010-09-03 13:02:47 +02001000 remove_chunk(int_buf, 0, i + 1);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001001 i = -1; /* back to square 1 */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001002 }
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001003 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001004
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001005 /* Remove leading unquoted spaces */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001006 for (i = 0; int_buf[i]; i++)
1007 if (int_buf[i] != ' ')
1008 break;
Denys Vlasenko9b56bf52010-09-03 13:02:47 +02001009 remove_chunk(int_buf, 0, i);
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001010
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001011 /* Determine completion mode */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001012 command_mode = FIND_EXE_ONLY;
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001013 for (i = 0; int_buf[i]; i++) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001014 if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001015 if (int_buf[i] == ' '
1016 && command_mode == FIND_EXE_ONLY
Denys Vlasenko81254ed2010-09-03 12:59:15 +02001017 && (char)int_buf[0] == 'c'
1018 && (char)int_buf[1] == 'd'
1019 && i == 2 /* -> int_buf[2] == ' ' */
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001020 ) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001021 command_mode = FIND_DIR_ONLY;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001022 } else {
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001023 command_mode = FIND_FILE_ONLY;
1024 break;
1025 }
1026 }
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001027 }
Denys Vlasenko2679e3c2010-09-03 12:53:15 +02001028 if (dbg_bmp) printf("command_mode(0:exe/1:dir/2:file):%d\n", command_mode);
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001029
1030 /* Remove everything except last word */
Denys Vlasenkob068bd72010-09-02 12:01:11 +02001031 for (i = 0; int_buf[i]; i++) /* quasi-strlen(int_buf) */
1032 continue;
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001033 for (--i; i >= 0; i--) {
Denys Vlasenko2679e3c2010-09-03 12:53:15 +02001034 int cur = int_buf[i];
1035 if (cur == ' ' || cur == '<' || cur == '>' || cur == '|' || cur == '&') {
Denys Vlasenko9b56bf52010-09-03 13:02:47 +02001036 remove_chunk(int_buf, 0, i + 1);
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001037 break;
1038 }
1039 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001040
Denys Vlasenko76939e72010-09-03 14:09:24 +02001041 /* Convert back to string of _chars_ */
Denys Vlasenko81254ed2010-09-03 12:59:15 +02001042 i = 0;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001043 while ((match_buf[i] = int_buf[i]) != '\0')
Denys Vlasenko81254ed2010-09-03 12:59:15 +02001044 i++;
Denys Vlasenko9b56bf52010-09-03 13:02:47 +02001045
Denys Vlasenko76939e72010-09-03 14:09:24 +02001046 if (dbg_bmp) printf("final match_buf:'%s'\n", match_buf);
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001047
1048 return command_mode;
Denys Vlasenko5c2e81b2009-07-16 14:14:34 +02001049}
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001050
Glenn L McGrath4d001292003-01-06 01:11:50 +00001051/*
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001052 * Display by column (original idea from ls applet,
1053 * very optimized by me [Vladimir] :)
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001054 */
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001055static void showfiles(void)
Glenn L McGrath4d001292003-01-06 01:11:50 +00001056{
1057 int ncols, row;
1058 int column_width = 0;
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001059 int nfiles = num_matches;
Glenn L McGrath4d001292003-01-06 01:11:50 +00001060 int nrows = nfiles;
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001061 int l;
Glenn L McGrath4d001292003-01-06 01:11:50 +00001062
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001063 /* find the longest file name - use that as the column width */
Glenn L McGrath4d001292003-01-06 01:11:50 +00001064 for (row = 0; row < nrows; row++) {
Tomas Heinrich11bcf4b2010-06-01 08:33:18 +02001065 l = unicode_strwidth(matches[row]);
Glenn L McGrath4d001292003-01-06 01:11:50 +00001066 if (column_width < l)
1067 column_width = l;
1068 }
1069 column_width += 2; /* min space for columns */
1070 ncols = cmdedit_termw / column_width;
1071
1072 if (ncols > 1) {
1073 nrows /= ncols;
Denis Vlasenko7f1dc212006-12-19 01:10:25 +00001074 if (nfiles % ncols)
Glenn L McGrath4d001292003-01-06 01:11:50 +00001075 nrows++; /* round up fractionals */
Glenn L McGrath4d001292003-01-06 01:11:50 +00001076 } else {
1077 ncols = 1;
1078 }
1079 for (row = 0; row < nrows; row++) {
1080 int n = row;
1081 int nc;
1082
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001083 for (nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++) {
Denis Vlasenkod56b47f2006-12-21 22:24:46 +00001084 printf("%s%-*s", matches[n],
Tomas Heinrich11bcf4b2010-06-01 08:33:18 +02001085 (int)(column_width - unicode_strwidth(matches[n])), ""
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001086 );
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001087 }
Tomas Heinrich11bcf4b2010-06-01 08:33:18 +02001088 if (ENABLE_UNICODE_SUPPORT)
Denys Vlasenko349d72c2018-09-30 16:56:56 +02001089 puts(printable_string(matches[n]));
Tomas Heinrich11bcf4b2010-06-01 08:33:18 +02001090 else
1091 puts(matches[n]);
Glenn L McGrath4d001292003-01-06 01:11:50 +00001092 }
1093}
1094
Mike Shalf3763032010-11-22 03:49:18 +01001095static const char *is_special_char(char c)
1096{
1097 return strchr(" `\"#$%^&*()=+{}[]:;'|\\<>", c);
1098}
1099
1100static char *quote_special_chars(char *found)
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001101{
1102 int l = 0;
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001103 char *s = xzalloc((strlen(found) + 1) * 2);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001104
1105 while (*found) {
Mike Shalf3763032010-11-22 03:49:18 +01001106 if (is_special_char(*found))
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001107 s[l++] = '\\';
1108 s[l++] = *found++;
1109 }
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001110 /* s[l] = '\0'; - already is */
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001111 return s;
1112}
1113
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001114/* Do TAB completion */
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001115static NOINLINE void input_tab(smallint *lastWasTab)
Erik Andersenf0657d32000-04-12 17:49:52 +00001116{
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001117 char *chosen_match;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001118 char *match_buf;
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001119 size_t len_found;
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001120 /* Length of string used for matching */
1121 unsigned match_pfx_len = match_pfx_len;
1122 int find_type;
Mike Shalf3763032010-11-22 03:49:18 +01001123# if ENABLE_UNICODE_SUPPORT
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001124 /* cursor pos in command converted to multibyte form */
1125 int cursor_mb;
Mike Shalf3763032010-11-22 03:49:18 +01001126# endif
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001127 if (!(state->flags & TAB_COMPLETION))
1128 return;
1129
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001130 if (*lastWasTab) {
1131 /* The last char was a TAB too.
1132 * Print a list of all the available choices.
1133 */
Denys Vlasenkoa46e16e2010-09-03 13:05:51 +02001134 if (num_matches > 0) {
1135 /* cursor will be changed by goto_new_line() */
Denys Vlasenko044b1802009-07-12 02:50:35 +02001136 int sav_cursor = cursor;
Mark Whitley4e338752001-01-26 20:42:23 +00001137 goto_new_line();
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001138 showfiles();
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02001139 draw_full(command_len - sav_cursor);
Erik Andersenf0657d32000-04-12 17:49:52 +00001140 }
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001141 return;
Erik Andersenf0657d32000-04-12 17:49:52 +00001142 }
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001143
1144 *lastWasTab = 1;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001145 chosen_match = NULL;
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001146
Denys Vlasenko76939e72010-09-03 14:09:24 +02001147 /* Make a local copy of the string up to the position of the cursor.
1148 * build_match_prefix will expand it into int16_t's, need to allocate
1149 * twice as much as the string_len+1.
1150 * (we then also (ab)use this extra space later - see (**))
1151 */
1152 match_buf = xmalloc(MAX_LINELEN * sizeof(int16_t));
Mike Shalf3763032010-11-22 03:49:18 +01001153# if !ENABLE_UNICODE_SUPPORT
Denys Vlasenko76939e72010-09-03 14:09:24 +02001154 save_string(match_buf, cursor + 1); /* +1 for NUL */
Mike Shalf3763032010-11-22 03:49:18 +01001155# else
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001156 {
1157 CHAR_T wc = command_ps[cursor];
1158 command_ps[cursor] = BB_NUL;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001159 save_string(match_buf, MAX_LINELEN);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001160 command_ps[cursor] = wc;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001161 cursor_mb = strlen(match_buf);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001162 }
Mike Shalf3763032010-11-22 03:49:18 +01001163# endif
Denys Vlasenko76939e72010-09-03 14:09:24 +02001164 find_type = build_match_prefix(match_buf);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001165
1166 /* Free up any memory already allocated */
1167 free_tab_completion_data();
1168
Mike Shalf3763032010-11-22 03:49:18 +01001169# if ENABLE_FEATURE_USERNAME_COMPLETION
1170 /* If the word starts with ~ and there is no slash in the word,
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001171 * then try completing this word as a username. */
1172 if (state->flags & USERNAME_COMPLETION)
Denys Vlasenko76939e72010-09-03 14:09:24 +02001173 if (match_buf[0] == '~' && strchr(match_buf, '/') == NULL)
1174 match_pfx_len = complete_username(match_buf);
Mike Shalf3763032010-11-22 03:49:18 +01001175# endif
1176 /* If complete_username() did not match,
1177 * try to match a command in $PATH, or a directory, or a file */
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001178 if (!matches)
Denys Vlasenko76939e72010-09-03 14:09:24 +02001179 match_pfx_len = complete_cmd_dir_file(match_buf, find_type);
Mike Shalf3763032010-11-22 03:49:18 +01001180
1181 /* Account for backslashes which will be inserted
1182 * by quote_special_chars() later */
1183 {
1184 const char *e = match_buf + strlen(match_buf);
1185 const char *s = e - match_pfx_len;
1186 while (s < e)
1187 if (is_special_char(*s++))
1188 match_pfx_len++;
1189 }
1190
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001191 /* Remove duplicates */
1192 if (matches) {
Mike Shalf3763032010-11-22 03:49:18 +01001193 unsigned i, n = 0;
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001194 qsort_string_vector(matches, num_matches);
1195 for (i = 0; i < num_matches - 1; ++i) {
1196 //if (matches[i] && matches[i+1]) { /* paranoia */
1197 if (strcmp(matches[i], matches[i+1]) == 0) {
1198 free(matches[i]);
1199 //matches[i] = NULL; /* paranoia */
1200 } else {
1201 matches[n++] = matches[i];
1202 }
1203 //}
1204 }
1205 matches[n++] = matches[i];
1206 num_matches = n;
1207 }
Mike Shalf3763032010-11-22 03:49:18 +01001208
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001209 /* Did we find exactly one match? */
1210 if (num_matches != 1) { /* no */
1211 char *cp;
1212 beep();
1213 if (!matches)
Denys Vlasenko76939e72010-09-03 14:09:24 +02001214 goto ret; /* no matches at all */
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001215 /* Find common prefix */
1216 chosen_match = xstrdup(matches[0]);
1217 for (cp = chosen_match; *cp; cp++) {
1218 unsigned n;
1219 for (n = 1; n < num_matches; n++) {
1220 if (matches[n][cp - chosen_match] != *cp) {
1221 goto stop;
1222 }
1223 }
1224 }
1225 stop:
1226 if (cp == chosen_match) { /* have unique prefix? */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001227 goto ret; /* no */
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001228 }
1229 *cp = '\0';
Mike Shalf3763032010-11-22 03:49:18 +01001230 cp = quote_special_chars(chosen_match);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001231 free(chosen_match);
1232 chosen_match = cp;
1233 len_found = strlen(chosen_match);
1234 } else { /* exactly one match */
1235 /* Next <tab> is not a double-tab */
1236 *lastWasTab = 0;
1237
Mike Shalf3763032010-11-22 03:49:18 +01001238 chosen_match = quote_special_chars(matches[0]);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001239 len_found = strlen(chosen_match);
1240 if (chosen_match[len_found-1] != '/') {
1241 chosen_match[len_found] = ' ';
1242 chosen_match[++len_found] = '\0';
1243 }
1244 }
1245
Mike Shalf3763032010-11-22 03:49:18 +01001246# if !ENABLE_UNICODE_SUPPORT
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001247 /* Have space to place the match? */
1248 /* The result consists of three parts with these lengths: */
1249 /* cursor + (len_found - match_pfx_len) + (command_len - cursor) */
1250 /* it simplifies into: */
1251 if ((int)(len_found - match_pfx_len + command_len) < S.maxsize) {
1252 int pos;
1253 /* save tail */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001254 strcpy(match_buf, &command_ps[cursor]);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001255 /* add match and tail */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001256 sprintf(&command_ps[cursor], "%s%s", chosen_match + match_pfx_len, match_buf);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001257 command_len = strlen(command_ps);
1258 /* new pos */
1259 pos = cursor + len_found - match_pfx_len;
1260 /* write out the matched command */
1261 redraw(cmdedit_y, command_len - pos);
1262 }
Mike Shalf3763032010-11-22 03:49:18 +01001263# else
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001264 {
Denys Vlasenko76939e72010-09-03 14:09:24 +02001265 /* Use 2nd half of match_buf as scratch space - see (**) */
1266 char *command = match_buf + MAX_LINELEN;
1267 int len = save_string(command, MAX_LINELEN);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001268 /* Have space to place the match? */
1269 /* cursor_mb + (len_found - match_pfx_len) + (len - cursor_mb) */
1270 if ((int)(len_found - match_pfx_len + len) < MAX_LINELEN) {
1271 int pos;
1272 /* save tail */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001273 strcpy(match_buf, &command[cursor_mb]);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001274 /* where do we want to have cursor after all? */
1275 strcpy(&command[cursor_mb], chosen_match + match_pfx_len);
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02001276 len = load_string(command);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001277 /* add match and tail */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001278 sprintf(&command[cursor_mb], "%s%s", chosen_match + match_pfx_len, match_buf);
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02001279 command_len = load_string(command);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001280 /* write out the matched command */
1281 /* paranoia: load_string can return 0 on conv error,
1282 * prevent passing pos = (0 - 12) to redraw */
1283 pos = command_len - len;
1284 redraw(cmdedit_y, pos >= 0 ? pos : 0);
1285 }
1286 }
Mike Shalf3763032010-11-22 03:49:18 +01001287# endif
Denys Vlasenko76939e72010-09-03 14:09:24 +02001288 ret:
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001289 free(chosen_match);
Denys Vlasenko76939e72010-09-03 14:09:24 +02001290 free(match_buf);
Erik Andersenf0657d32000-04-12 17:49:52 +00001291}
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001292
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001293#endif /* FEATURE_TAB_COMPLETION */
Erik Andersenf0657d32000-04-12 17:49:52 +00001294
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001295
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001296line_input_t* FAST_FUNC new_line_input_t(int flags)
1297{
1298 line_input_t *n = xzalloc(sizeof(*n));
1299 n->flags = flags;
Denys Vlasenko84ea60e2017-08-02 17:27:28 +02001300 n->timeout = -1;
Denys Vlasenko79df4812014-01-10 14:38:26 +01001301#if MAX_HISTORY > 0
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001302 n->max_history = MAX_HISTORY;
Denys Vlasenko79df4812014-01-10 14:38:26 +01001303#endif
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001304 return n;
1305}
1306
1307
Denis Vlasenko9d4533e2006-11-02 22:09:37 +00001308#if MAX_HISTORY > 0
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001309
Flemming Madsend96ffda2013-04-07 18:47:24 +02001310unsigned FAST_FUNC size_from_HISTFILESIZE(const char *hp)
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001311{
1312 int size = MAX_HISTORY;
1313 if (hp) {
1314 size = atoi(hp);
1315 if (size <= 0)
1316 return 1;
1317 if (size > MAX_HISTORY)
1318 return MAX_HISTORY;
1319 }
1320 return size;
1321}
1322
Denis Vlasenko682ad302008-09-27 01:28:56 +00001323static void save_command_ps_at_cur_history(void)
Erik Andersenf0657d32000-04-12 17:49:52 +00001324{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001325 if (command_ps[0] != BB_NUL) {
Denis Vlasenko682ad302008-09-27 01:28:56 +00001326 int cur = state->cur_history;
1327 free(state->history[cur]);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001328
Denys Vlasenko19158a82010-03-26 14:06:56 +01001329# if ENABLE_UNICODE_SUPPORT
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001330 {
1331 char tbuf[MAX_LINELEN];
1332 save_string(tbuf, sizeof(tbuf));
1333 state->history[cur] = xstrdup(tbuf);
1334 }
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001335# else
Denis Vlasenko682ad302008-09-27 01:28:56 +00001336 state->history[cur] = xstrdup(command_ps);
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001337# endif
Glenn L McGrath062c74f2002-11-27 09:29:49 +00001338 }
Denis Vlasenko682ad302008-09-27 01:28:56 +00001339}
1340
1341/* state->flags is already checked to be nonzero */
1342static int get_previous_history(void)
1343{
1344 if ((state->flags & DO_HISTORY) && state->cur_history) {
1345 save_command_ps_at_cur_history();
1346 state->cur_history--;
1347 return 1;
1348 }
1349 beep();
1350 return 0;
Erik Andersenf0657d32000-04-12 17:49:52 +00001351}
1352
Glenn L McGrath062c74f2002-11-27 09:29:49 +00001353static int get_next_history(void)
Erik Andersenf0657d32000-04-12 17:49:52 +00001354{
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001355 if (state->flags & DO_HISTORY) {
Denis Vlasenko682ad302008-09-27 01:28:56 +00001356 if (state->cur_history < state->cnt_history) {
1357 save_command_ps_at_cur_history(); /* save the current history line */
1358 return ++state->cur_history;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001359 }
Glenn L McGrath062c74f2002-11-27 09:29:49 +00001360 }
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001361 beep();
1362 return 0;
Erik Andersenf0657d32000-04-12 17:49:52 +00001363}
Robert Griebl350d26b2002-12-03 22:45:46 +00001364
Flemming Madsend96ffda2013-04-07 18:47:24 +02001365/* Lists command history. Used by shell 'history' builtins */
1366void FAST_FUNC show_history(const line_input_t *st)
1367{
1368 int i;
1369
1370 if (!st)
1371 return;
1372 for (i = 0; i < st->cnt_history; i++)
1373 printf("%4d %s\n", i, st->history[i]);
1374}
1375
Denys Vlasenko3d27d432018-12-27 18:03:20 +01001376void FAST_FUNC free_line_input_t(line_input_t *n)
1377{
1378# if ENABLE_FEATURE_EDITING_SAVEHISTORY
1379 int i = n->cnt_history;
1380 while (i > 0)
1381 free(n->history[--i]);
1382#endif
1383 free(n);
1384}
1385
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001386# if ENABLE_FEATURE_EDITING_SAVEHISTORY
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001387/* We try to ensure that concurrent additions to the history
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001388 * do not overwrite each other.
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001389 * Otherwise shell users get unhappy.
1390 *
1391 * History file is trimmed lazily, when it grows several times longer
1392 * than configured MAX_HISTORY lines.
1393 */
1394
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001395/* state->flags is already checked to be nonzero */
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001396static void load_history(line_input_t *st_parm)
Glenn L McGrathfdbbb042002-12-09 11:10:40 +00001397{
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001398 char *temp_h[MAX_HISTORY];
1399 char *line;
Robert Griebl350d26b2002-12-03 22:45:46 +00001400 FILE *fp;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001401 unsigned idx, i, line_len;
Robert Griebl350d26b2002-12-03 22:45:46 +00001402
Denis Vlasenko08ec67b2008-03-26 13:32:30 +00001403 /* NB: do not trash old history if file can't be opened */
Robert Griebl350d26b2002-12-03 22:45:46 +00001404
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001405 fp = fopen_for_read(st_parm->hist_file);
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001406 if (fp) {
Denis Vlasenko08ec67b2008-03-26 13:32:30 +00001407 /* clean up old history */
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001408 for (idx = st_parm->cnt_history; idx > 0;) {
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001409 idx--;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001410 free(st_parm->history[idx]);
1411 st_parm->history[idx] = NULL;
Denis Vlasenko08ec67b2008-03-26 13:32:30 +00001412 }
1413
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001414 /* fill temp_h[], retaining only last MAX_HISTORY lines */
1415 memset(temp_h, 0, sizeof(temp_h));
Denys Vlasenkobede2152011-09-04 16:12:33 +02001416 idx = 0;
Dennis Groenendeee3562012-04-24 22:40:58 +02001417 st_parm->cnt_history_in_file = 0;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001418 while ((line = xmalloc_fgetline(fp)) != NULL) {
1419 if (line[0] == '\0') {
1420 free(line);
Glenn L McGrathfdbbb042002-12-09 11:10:40 +00001421 continue;
1422 }
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001423 free(temp_h[idx]);
1424 temp_h[idx] = line;
Dennis Groenendeee3562012-04-24 22:40:58 +02001425 st_parm->cnt_history_in_file++;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001426 idx++;
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001427 if (idx == st_parm->max_history)
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001428 idx = 0;
Robert Griebl350d26b2002-12-03 22:45:46 +00001429 }
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001430 fclose(fp);
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001431
1432 /* find first non-NULL temp_h[], if any */
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001433 if (st_parm->cnt_history_in_file) {
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001434 while (temp_h[idx] == NULL) {
1435 idx++;
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001436 if (idx == st_parm->max_history)
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001437 idx = 0;
1438 }
1439 }
1440
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001441 /* copy temp_h[] to st_parm->history[] */
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001442 for (i = 0; i < st_parm->max_history;) {
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001443 line = temp_h[idx];
1444 if (!line)
1445 break;
1446 idx++;
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001447 if (idx == st_parm->max_history)
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001448 idx = 0;
1449 line_len = strlen(line);
1450 if (line_len >= MAX_LINELEN)
1451 line[MAX_LINELEN-1] = '\0';
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001452 st_parm->history[i++] = line;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001453 }
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001454 st_parm->cnt_history = i;
Denys Vlasenkobede2152011-09-04 16:12:33 +02001455 if (ENABLE_FEATURE_EDITING_SAVE_ON_EXIT)
1456 st_parm->cnt_history_in_file = i;
Robert Griebl350d26b2002-12-03 22:45:46 +00001457 }
Robert Griebl350d26b2002-12-03 22:45:46 +00001458}
1459
Denys Vlasenkobede2152011-09-04 16:12:33 +02001460# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1461void save_history(line_input_t *st)
1462{
1463 FILE *fp;
1464
Denys Vlasenkobede2152011-09-04 16:12:33 +02001465 if (!st->hist_file)
1466 return;
1467 if (st->cnt_history <= st->cnt_history_in_file)
1468 return;
1469
1470 fp = fopen(st->hist_file, "a");
1471 if (fp) {
1472 int i, fd;
1473 char *new_name;
1474 line_input_t *st_temp;
1475
1476 for (i = st->cnt_history_in_file; i < st->cnt_history; i++)
1477 fprintf(fp, "%s\n", st->history[i]);
1478 fclose(fp);
1479
1480 /* we may have concurrently written entries from others.
1481 * load them */
1482 st_temp = new_line_input_t(st->flags);
1483 st_temp->hist_file = st->hist_file;
1484 st_temp->max_history = st->max_history;
1485 load_history(st_temp);
1486
1487 /* write out temp file and replace hist_file atomically */
1488 new_name = xasprintf("%s.%u.new", st->hist_file, (int) getpid());
1489 fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
1490 if (fd >= 0) {
1491 fp = xfdopen_for_write(fd);
1492 for (i = 0; i < st_temp->cnt_history; i++)
1493 fprintf(fp, "%s\n", st_temp->history[i]);
1494 fclose(fp);
1495 if (rename(new_name, st->hist_file) == 0)
1496 st->cnt_history_in_file = st_temp->cnt_history;
1497 }
1498 free(new_name);
1499 free_line_input_t(st_temp);
1500 }
1501}
1502# else
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001503static void save_history(char *str)
Robert Griebl350d26b2002-12-03 22:45:46 +00001504{
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001505 int fd;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001506 int len, len2;
Eric Andersenc470f442003-07-28 09:56:35 +00001507
Denys Vlasenkobede2152011-09-04 16:12:33 +02001508 if (!state->hist_file)
1509 return;
1510
Wolfram Sang2e9aeae2010-11-15 02:58:28 +01001511 fd = open(state->hist_file, O_WRONLY | O_CREAT | O_APPEND, 0600);
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001512 if (fd < 0)
1513 return;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001514 xlseek(fd, 0, SEEK_END); /* paranoia */
1515 len = strlen(str);
1516 str[len] = '\n'; /* we (try to) do atomic write */
1517 len2 = full_write(fd, str, len + 1);
1518 str[len] = '\0';
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001519 close(fd);
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001520 if (len2 != len + 1)
1521 return; /* "wtf?" */
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001522
1523 /* did we write so much that history file needs trimming? */
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001524 state->cnt_history_in_file++;
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001525 if (state->cnt_history_in_file > state->max_history * 4) {
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001526 char *new_name;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001527 line_input_t *st_temp;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001528
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001529 /* we may have concurrently written entries from others.
1530 * load them */
1531 st_temp = new_line_input_t(state->flags);
1532 st_temp->hist_file = state->hist_file;
Denys Vlasenkoe3d8d072011-03-31 14:39:38 +02001533 st_temp->max_history = state->max_history;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001534 load_history(st_temp);
1535
1536 /* write out temp file and replace hist_file atomically */
1537 new_name = xasprintf("%s.%u.new", state->hist_file, (int) getpid());
Denys Vlasenko4840ae82011-09-04 15:28:03 +02001538 fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
Wolfram Sang2e9aeae2010-11-15 02:58:28 +01001539 if (fd >= 0) {
1540 FILE *fp;
1541 int i;
1542
1543 fp = xfdopen_for_write(fd);
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001544 for (i = 0; i < st_temp->cnt_history; i++)
1545 fprintf(fp, "%s\n", st_temp->history[i]);
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001546 fclose(fp);
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001547 if (rename(new_name, state->hist_file) == 0)
1548 state->cnt_history_in_file = st_temp->cnt_history;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001549 }
1550 free(new_name);
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001551 free_line_input_t(st_temp);
Robert Griebl350d26b2002-12-03 22:45:46 +00001552 }
Robert Griebl350d26b2002-12-03 22:45:46 +00001553}
Denys Vlasenkobede2152011-09-04 16:12:33 +02001554# endif
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001555# else
1556# define load_history(a) ((void)0)
1557# define save_history(a) ((void)0)
1558# endif /* FEATURE_COMMAND_SAVEHISTORY */
Robert Griebl350d26b2002-12-03 22:45:46 +00001559
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001560static void remember_in_history(char *str)
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001561{
1562 int i;
1563
1564 if (!(state->flags & DO_HISTORY))
1565 return;
Denis Vlasenko682ad302008-09-27 01:28:56 +00001566 if (str[0] == '\0')
1567 return;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001568 i = state->cnt_history;
Denis Vlasenko682ad302008-09-27 01:28:56 +00001569 /* Don't save dupes */
1570 if (i && strcmp(state->history[i-1], str) == 0)
1571 return;
1572
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001573 free(state->history[state->max_history]); /* redundant, paranoia */
1574 state->history[state->max_history] = NULL; /* redundant, paranoia */
Denis Vlasenko682ad302008-09-27 01:28:56 +00001575
1576 /* If history[] is full, remove the oldest command */
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001577 /* we need to keep history[state->max_history] empty, hence >=, not > */
1578 if (i >= state->max_history) {
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001579 free(state->history[0]);
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001580 for (i = 0; i < state->max_history-1; i++)
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001581 state->history[i] = state->history[i+1];
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001582 /* i == state->max_history-1 */
Denys Vlasenkoc0cae522011-11-04 01:09:09 +01001583# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1584 if (state->cnt_history_in_file)
Denys Vlasenkobede2152011-09-04 16:12:33 +02001585 state->cnt_history_in_file--;
Denys Vlasenkoc0cae522011-11-04 01:09:09 +01001586# endif
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001587 }
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001588 /* i <= state->max_history-1 */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001589 state->history[i++] = xstrdup(str);
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001590 /* i <= state->max_history */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001591 state->cur_history = i;
1592 state->cnt_history = i;
Denys Vlasenkobede2152011-09-04 16:12:33 +02001593# if ENABLE_FEATURE_EDITING_SAVEHISTORY && !ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1594 save_history(str);
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001595# endif
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001596}
1597
1598#else /* MAX_HISTORY == 0 */
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001599# define remember_in_history(a) ((void)0)
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001600#endif /* MAX_HISTORY */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001601
1602
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01001603#if ENABLE_FEATURE_EDITING_VI
Erik Andersen6273f652000-03-17 01:12:41 +00001604/*
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001605 * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
Erik Andersen6273f652000-03-17 01:12:41 +00001606 */
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001607static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001608vi_Word_motion(int eat)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001609{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001610 CHAR_T *command = command_ps;
1611
1612 while (cursor < command_len && !BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001613 input_forward();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001614 if (eat) while (cursor < command_len && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001615 input_forward();
1616}
1617
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001618static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001619vi_word_motion(int eat)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001620{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001621 CHAR_T *command = command_ps;
1622
Natanael Copa7e6f9312016-08-14 23:30:29 +02001623 if (BB_isalnum_or_underscore(command[cursor])) {
Denis Vlasenko253ce002007-01-22 08:34:44 +00001624 while (cursor < command_len
Natanael Copa7e6f9312016-08-14 23:30:29 +02001625 && (BB_isalnum_or_underscore(command[cursor+1]))
Denys Vlasenko13028922009-07-12 00:51:15 +02001626 ) {
Paul Fox3f11b1b2005-08-04 19:04:46 +00001627 input_forward();
Denys Vlasenko13028922009-07-12 00:51:15 +02001628 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001629 } else if (BB_ispunct(command[cursor])) {
1630 while (cursor < command_len && BB_ispunct(command[cursor+1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001631 input_forward();
1632 }
1633
Denis Vlasenko253ce002007-01-22 08:34:44 +00001634 if (cursor < command_len)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001635 input_forward();
1636
Denys Vlasenko13028922009-07-12 00:51:15 +02001637 if (eat) {
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001638 while (cursor < command_len && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001639 input_forward();
Denys Vlasenko13028922009-07-12 00:51:15 +02001640 }
Paul Fox3f11b1b2005-08-04 19:04:46 +00001641}
1642
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001643static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001644vi_End_motion(void)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001645{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001646 CHAR_T *command = command_ps;
1647
Paul Fox3f11b1b2005-08-04 19:04:46 +00001648 input_forward();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001649 while (cursor < command_len && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001650 input_forward();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001651 while (cursor < command_len-1 && !BB_isspace(command[cursor+1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001652 input_forward();
1653}
1654
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001655static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001656vi_end_motion(void)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001657{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001658 CHAR_T *command = command_ps;
1659
Denis Vlasenko253ce002007-01-22 08:34:44 +00001660 if (cursor >= command_len-1)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001661 return;
1662 input_forward();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001663 while (cursor < command_len-1 && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001664 input_forward();
Denis Vlasenko253ce002007-01-22 08:34:44 +00001665 if (cursor >= command_len-1)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001666 return;
Natanael Copa7e6f9312016-08-14 23:30:29 +02001667 if (BB_isalnum_or_underscore(command[cursor])) {
Denis Vlasenko253ce002007-01-22 08:34:44 +00001668 while (cursor < command_len-1
Natanael Copa7e6f9312016-08-14 23:30:29 +02001669 && (BB_isalnum_or_underscore(command[cursor+1]))
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001670 ) {
Paul Fox3f11b1b2005-08-04 19:04:46 +00001671 input_forward();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001672 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001673 } else if (BB_ispunct(command[cursor])) {
1674 while (cursor < command_len-1 && BB_ispunct(command[cursor+1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001675 input_forward();
1676 }
1677}
1678
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001679static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001680vi_Back_motion(void)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001681{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001682 CHAR_T *command = command_ps;
1683
1684 while (cursor > 0 && BB_isspace(command[cursor-1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001685 input_backward(1);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001686 while (cursor > 0 && !BB_isspace(command[cursor-1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001687 input_backward(1);
1688}
1689
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001690static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001691vi_back_motion(void)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001692{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001693 CHAR_T *command = command_ps;
1694
Paul Fox3f11b1b2005-08-04 19:04:46 +00001695 if (cursor <= 0)
1696 return;
1697 input_backward(1);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001698 while (cursor > 0 && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001699 input_backward(1);
1700 if (cursor <= 0)
1701 return;
Natanael Copa7e6f9312016-08-14 23:30:29 +02001702 if (BB_isalnum_or_underscore(command[cursor])) {
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001703 while (cursor > 0
Natanael Copa7e6f9312016-08-14 23:30:29 +02001704 && (BB_isalnum_or_underscore(command[cursor-1]))
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001705 ) {
Paul Fox3f11b1b2005-08-04 19:04:46 +00001706 input_backward(1);
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001707 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001708 } else if (BB_ispunct(command[cursor])) {
1709 while (cursor > 0 && BB_ispunct(command[cursor-1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001710 input_backward(1);
1711 }
1712}
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001713#endif
1714
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01001715/* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
1716static void ctrl_left(void)
1717{
1718 CHAR_T *command = command_ps;
1719
1720 while (1) {
1721 CHAR_T c;
1722
1723 input_backward(1);
1724 if (cursor == 0)
1725 break;
1726 c = command[cursor];
1727 if (c != ' ' && !BB_ispunct(c)) {
1728 /* we reached a "word" delimited by spaces/punct.
1729 * go to its beginning */
1730 while (1) {
1731 c = command[cursor - 1];
1732 if (c == ' ' || BB_ispunct(c))
1733 break;
1734 input_backward(1);
1735 if (cursor == 0)
1736 break;
1737 }
1738 break;
1739 }
1740 }
1741}
1742static void ctrl_right(void)
1743{
1744 CHAR_T *command = command_ps;
1745
1746 while (1) {
1747 CHAR_T c;
1748
1749 c = command[cursor];
1750 if (c == BB_NUL)
1751 break;
1752 if (c != ' ' && !BB_ispunct(c)) {
1753 /* we reached a "word" delimited by spaces/punct.
1754 * go to its end + 1 */
1755 while (1) {
1756 input_forward();
1757 c = command[cursor];
1758 if (c == BB_NUL || c == ' ' || BB_ispunct(c))
1759 break;
1760 }
1761 break;
1762 }
1763 input_forward();
1764 }
1765}
1766
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001767
1768/*
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001769 * read_line_input and its helpers
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001770 */
1771
Denys Vlasenko13ad9062009-11-11 03:19:30 +01001772#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
1773static void ask_terminal(void)
1774{
1775 /* Ask terminal where is the cursor now.
1776 * lineedit_read_key handles response and corrects
1777 * our idea of current cursor position.
1778 * Testcase: run "echo -n long_line_long_line_long_line",
1779 * then type in a long, wrapping command and try to
1780 * delete it using backspace key.
1781 * Note: we print it _after_ prompt, because
1782 * prompt may contain CR. Example: PS1='\[\r\n\]\w '
1783 */
1784 /* Problem: if there is buffered input on stdin,
1785 * the response will be delivered later,
1786 * possibly to an unsuspecting application.
1787 * Testcase: "sleep 1; busybox ash" + press and hold [Enter].
1788 * Result:
1789 * ~/srcdevel/bbox/fix/busybox.t4 #
1790 * ~/srcdevel/bbox/fix/busybox.t4 #
1791 * ^[[59;34~/srcdevel/bbox/fix/busybox.t4 # <-- garbage
1792 * ~/srcdevel/bbox/fix/busybox.t4 #
1793 *
1794 * Checking for input with poll only makes the race narrower,
1795 * I still can trigger it. Strace:
1796 *
1797 * write(1, "~/srcdevel/bbox/fix/busybox.t4 # ", 33) = 33
1798 * poll([{fd=0, events=POLLIN}], 1, 0) = 0 (Timeout) <-- no input exists
1799 * write(1, "\33[6n", 4) = 4 <-- send the ESC sequence, quick!
Alexey Fomenko232ebaa2011-05-20 04:26:29 +02001800 * poll([{fd=0, events=POLLIN}], 1, -1) = 1 ([{fd=0, revents=POLLIN}])
Denys Vlasenko13ad9062009-11-11 03:19:30 +01001801 * read(0, "\n", 1) = 1 <-- oh crap, user's input got in first
1802 */
Denys Vlasenko451add42010-07-25 00:06:41 +02001803 struct pollfd pfd;
Denys Vlasenko13ad9062009-11-11 03:19:30 +01001804
Denys Vlasenko451add42010-07-25 00:06:41 +02001805 pfd.fd = STDIN_FILENO;
1806 pfd.events = POLLIN;
1807 if (safe_poll(&pfd, 1, 0) == 0) {
1808 S.sent_ESC_br6n = 1;
Marek Polacek7b181072010-10-28 21:34:56 +02001809 fputs(ESC"[6n", stdout);
Denys Vlasenko451add42010-07-25 00:06:41 +02001810 fflush_all(); /* make terminal see it ASAP! */
Denys Vlasenko13ad9062009-11-11 03:19:30 +01001811 }
1812}
1813#else
1814#define ask_terminal() ((void)0)
1815#endif
1816
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02001817/* Note about multi-line PS1 (e.g. "\n\w \u@\h\n> ") and prompt redrawing:
1818 *
1819 * If the prompt has any newlines, after we print it once we use only its last
1820 * line to redraw in-place, which makes it simpler to calculate how many lines
1821 * we should move the cursor up to align the redraw (cmdedit_y). The earlier
1822 * prompt lines just stay on screen and we redraw below them.
1823 *
1824 * Use cases for all prompt lines beyond the initial draw:
1825 * - After clear-screen (^L) or after displaying tab-completion choices, we
1826 * print the full prompt, as it isn't redrawn in-place.
1827 * - During terminal resize we could try to redraw all lines, but we don't,
1828 * because it requires delicate alignment, it's good enough with only the
1829 * last line, and doing it wrong is arguably worse than not doing it at all.
1830 *
1831 * Terminology wise, if it doesn't mention "full", then it means the last/sole
1832 * prompt line. We use the prompt (last/sole line) while redrawing in-place,
1833 * and the full where we need a fresh one unrelated to an earlier position.
1834 *
1835 * If PS1 is not multiline, the last/sole line and the full are the same string.
1836 */
1837
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001838/* Called just once at read_line_input() init time */
Denis Vlasenko38f63192007-01-22 09:03:07 +00001839#if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00001840static void parse_and_put_prompt(const char *prmt_ptr)
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001841{
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001842 const char *p;
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02001843 cmdedit_prompt = prompt_last_line = prmt_ptr;
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001844 p = strrchr(prmt_ptr, '\n');
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02001845 if (p)
1846 prompt_last_line = p + 1;
1847 cmdedit_prmt_len = unicode_strwidth(prompt_last_line);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001848 put_prompt();
1849}
1850#else
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00001851static void parse_and_put_prompt(const char *prmt_ptr)
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001852{
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001853 int prmt_size = 0;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001854 char *prmt_mem_ptr = xzalloc(1);
Denys Vlasenko1d145692013-03-29 13:09:05 +01001855# if ENABLE_USERNAME_OR_HOMEDIR
1856 char *cwd_buf = NULL;
1857# endif
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001858 char flg_not_length = '[';
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001859 char cbuf[2];
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001860
Denys Vlasenko7a180432013-08-19 16:44:05 +02001861 /*cmdedit_prmt_len = 0; - already is */
Denis Vlasenko6258fd32007-01-22 07:30:26 +00001862
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001863 cbuf[1] = '\0'; /* never changes */
1864
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001865 while (*prmt_ptr) {
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001866 char timebuf[sizeof("HH:MM:SS")];
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001867 char *free_me = NULL;
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001868 char *pbuf;
1869 char c;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001870
1871 pbuf = cbuf;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001872 c = *prmt_ptr++;
1873 if (c == '\\') {
Denys Vlasenko1d145692013-03-29 13:09:05 +01001874 const char *cp;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001875 int l;
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001876/*
1877 * Supported via bb_process_escape_sequence:
1878 * \a ASCII bell character (07)
1879 * \e ASCII escape character (033)
1880 * \n newline
1881 * \r carriage return
1882 * \\ backslash
1883 * \nnn char with octal code nnn
1884 * Supported:
1885 * \$ if the effective UID is 0, a #, otherwise a $
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001886 * \w current working directory, with $HOME abbreviated with a tilde
1887 * Note: we do not support $PROMPT_DIRTRIM=n feature
Denys Vlasenko1d145692013-03-29 13:09:05 +01001888 * \W basename of the current working directory, with $HOME abbreviated with a tilde
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001889 * \h hostname up to the first '.'
1890 * \H hostname
1891 * \u username
1892 * \[ begin a sequence of non-printing characters
1893 * \] end a sequence of non-printing characters
Denys Vlasenko1d145692013-03-29 13:09:05 +01001894 * \T current time in 12-hour HH:MM:SS format
1895 * \@ current time in 12-hour am/pm format
1896 * \A current time in 24-hour HH:MM format
1897 * \t current time in 24-hour HH:MM:SS format
1898 * (all of the above work as \A)
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001899 * Not supported:
Denys Vlasenko1d145692013-03-29 13:09:05 +01001900 * \! history number of this command
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001901 * \# command number of this command
1902 * \j number of jobs currently managed by the shell
1903 * \l basename of the shell's terminal device name
1904 * \s name of the shell, the basename of $0 (the portion following the final slash)
1905 * \V release of bash, version + patch level (e.g., 2.00.0)
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001906 * \d date in "Weekday Month Date" format (e.g., "Tue May 26")
1907 * \D{format}
1908 * format is passed to strftime(3).
1909 * An empty format results in a locale-specific time representation.
1910 * The braces are required.
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001911 * Mishandled by bb_process_escape_sequence:
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001912 * \v version of bash (e.g., 2.00)
1913 */
Denys Vlasenko1d145692013-03-29 13:09:05 +01001914 cp = prmt_ptr;
1915 c = *cp;
1916 if (c != 't') /* don't treat \t as tab */
1917 c = bb_process_escape_sequence(&prmt_ptr);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001918 if (prmt_ptr == cp) {
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00001919 if (*cp == '\0')
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001920 break;
1921 c = *prmt_ptr++;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001922
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001923 switch (c) {
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02001924# if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001925 case 'u':
Denis Vlasenko86b29ea2007-09-27 10:17:16 +00001926 pbuf = user_buf ? user_buf : (char*)"";
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001927 break;
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001928# endif
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001929 case 'H':
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001930 case 'h':
Denis Vlasenko6f1713f2008-02-25 23:23:58 +00001931 pbuf = free_me = safe_gethostname();
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001932 if (c == 'h')
1933 strchrnul(pbuf, '.')[0] = '\0';
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001934 break;
1935 case '$':
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001936 c = (geteuid() == 0 ? '#' : '$');
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001937 break;
Denys Vlasenko1d145692013-03-29 13:09:05 +01001938 case 'T': /* 12-hour HH:MM:SS format */
1939 case '@': /* 12-hour am/pm format */
1940 case 'A': /* 24-hour HH:MM format */
1941 case 't': /* 24-hour HH:MM:SS format */
1942 /* We show all of them as 24-hour HH:MM */
1943 strftime_HHMMSS(timebuf, sizeof(timebuf), NULL)[-3] = '\0';
1944 pbuf = timebuf;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001945 break;
Denys Vlasenko1d145692013-03-29 13:09:05 +01001946# if ENABLE_USERNAME_OR_HOMEDIR
1947 case 'w': /* current dir */
1948 case 'W': /* basename of cur dir */
1949 if (!cwd_buf) {
1950 cwd_buf = xrealloc_getcwd_or_warn(NULL);
1951 if (!cwd_buf)
1952 cwd_buf = (char *)bb_msg_unknown;
Denys Vlasenko8dff01d2015-03-12 17:48:34 +01001953 else if (home_pwd_buf[0]) {
1954 char *after_home_user;
1955
Denys Vlasenko1d145692013-03-29 13:09:05 +01001956 /* /home/user[/something] -> ~[/something] */
Denys Vlasenko8dff01d2015-03-12 17:48:34 +01001957 after_home_user = is_prefixed_with(cwd_buf, home_pwd_buf);
1958 if (after_home_user
1959 && (*after_home_user == '/' || *after_home_user == '\0')
Denys Vlasenko1d145692013-03-29 13:09:05 +01001960 ) {
1961 cwd_buf[0] = '~';
Denys Vlasenko8dff01d2015-03-12 17:48:34 +01001962 overlapping_strcpy(cwd_buf + 1, after_home_user);
Denys Vlasenko1d145692013-03-29 13:09:05 +01001963 }
1964 }
1965 }
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001966 pbuf = cwd_buf;
Denys Vlasenko1d145692013-03-29 13:09:05 +01001967 if (c == 'w')
1968 break;
Denis Vlasenkodc757aa2007-06-30 08:04:05 +00001969 cp = strrchr(pbuf, '/');
Denys Vlasenko8172d052013-03-29 13:21:53 +01001970 if (cp)
Denys Vlasenko1d145692013-03-29 13:09:05 +01001971 pbuf = (char*)cp + 1;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001972 break;
Denys Vlasenko1d145692013-03-29 13:09:05 +01001973# endif
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001974// bb_process_escape_sequence does this now:
1975// case 'e': case 'E': /* \e \E = \033 */
1976// c = '\033';
1977// break;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001978 case 'x': case 'X': {
1979 char buf2[4];
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001980 for (l = 0; l < 3;) {
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001981 unsigned h;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001982 buf2[l++] = *prmt_ptr;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001983 buf2[l] = '\0';
1984 h = strtoul(buf2, &pbuf, 16);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001985 if (h > UCHAR_MAX || (pbuf - buf2) < l) {
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001986 buf2[--l] = '\0';
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001987 break;
1988 }
1989 prmt_ptr++;
1990 }
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001991 c = (char)strtoul(buf2, NULL, 16);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001992 if (c == 0)
1993 c = '?';
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001994 pbuf = cbuf;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001995 break;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001996 }
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001997 case '[': case ']':
1998 if (c == flg_not_length) {
Denys Vlasenko7a180432013-08-19 16:44:05 +02001999 /* Toggle '['/']' hex 5b/5d */
2000 flg_not_length ^= 6;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002001 continue;
2002 }
2003 break;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00002004 } /* switch */
2005 } /* if */
2006 } /* if */
2007 cbuf[0] = c;
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02002008 {
2009 int n = strlen(pbuf);
2010 prmt_size += n;
2011 if (c == '\n')
2012 cmdedit_prmt_len = 0;
2013 else if (flg_not_length != ']') {
2014#if 0 /*ENABLE_UNICODE_SUPPORT*/
2015/* Won't work, pbuf is one BYTE string here instead of an one Unicode char string. */
2016/* FIXME */
Denys Vlasenko1b9ac212013-08-20 16:13:05 +02002017 cmdedit_prmt_len += unicode_strwidth(pbuf);
Denys Vlasenko7a180432013-08-19 16:44:05 +02002018#else
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02002019 cmdedit_prmt_len += n;
Denys Vlasenko7a180432013-08-19 16:44:05 +02002020#endif
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02002021 }
Denys Vlasenko7a180432013-08-19 16:44:05 +02002022 }
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02002023 prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_size+1), pbuf);
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00002024 free(free_me);
2025 } /* while */
2026
Denys Vlasenko1d145692013-03-29 13:09:05 +01002027# if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00002028 if (cwd_buf != (char *)bb_msg_unknown)
2029 free(cwd_buf);
Denys Vlasenko1d145692013-03-29 13:09:05 +01002030# endif
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02002031 /* see comment (above this function) about multiline prompt redrawing */
2032 cmdedit_prompt = prompt_last_line = prmt_mem_ptr;
2033 prmt_ptr = strrchr(cmdedit_prompt, '\n');
2034 if (prmt_ptr)
2035 prompt_last_line = prmt_ptr + 1;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002036 put_prompt();
2037}
Paul Fox3f11b1b2005-08-04 19:04:46 +00002038#endif
2039
Ron Yorston23286902018-02-25 20:09:54 +01002040#if ENABLE_FEATURE_EDITING_WINCH
Denys Vlasenko038a9772016-11-28 01:10:16 +01002041static void cmdedit_setwidth(void)
Denis Vlasenko5592fac2007-01-21 19:19:46 +00002042{
Denys Vlasenko038a9772016-11-28 01:10:16 +01002043 int new_y;
2044
2045 cmdedit_termw = get_terminal_width(STDIN_FILENO);
2046 /* new y for current cursor */
2047 new_y = (cursor + cmdedit_prmt_len) / cmdedit_termw;
2048 /* redraw */
2049 redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
Denis Vlasenko5592fac2007-01-21 19:19:46 +00002050}
2051
Denys Vlasenkobff71d32016-11-27 22:25:07 +01002052static void win_changed(int nsig UNUSED_PARAM)
Denis Vlasenko5592fac2007-01-21 19:19:46 +00002053{
Denys Vlasenkobff71d32016-11-27 22:25:07 +01002054 if (S.ok_to_redraw) {
2055 /* We are in read_key(), safe to redraw immediately */
2056 int sv_errno = errno;
Denys Vlasenko038a9772016-11-28 01:10:16 +01002057 cmdedit_setwidth();
2058 fflush_all();
Denys Vlasenkobff71d32016-11-27 22:25:07 +01002059 errno = sv_errno;
2060 } else {
2061 /* Signal main loop that redraw is necessary */
2062 S.SIGWINCH_count++;
2063 }
Denis Vlasenko5592fac2007-01-21 19:19:46 +00002064}
Ron Yorston23286902018-02-25 20:09:54 +01002065#endif
Denis Vlasenko5592fac2007-01-21 19:19:46 +00002066
Denys Vlasenko66c5b122011-02-08 05:07:02 +01002067static int lineedit_read_key(char *read_key_buffer, int timeout)
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002068{
Denys Vlasenko020f4062009-05-17 16:44:54 +02002069 int64_t ic;
Denys Vlasenko19158a82010-03-26 14:06:56 +01002070#if ENABLE_UNICODE_SUPPORT
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002071 char unicode_buf[MB_CUR_MAX + 1];
2072 int unicode_idx = 0;
2073#endif
Denys Vlasenko020f4062009-05-17 16:44:54 +02002074
Denys Vlasenko038a9772016-11-28 01:10:16 +01002075 fflush_all();
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002076 while (1) {
2077 /* Wait for input. TIMEOUT = -1 makes read_key wait even
2078 * on nonblocking stdin, TIMEOUT = 50 makes sure we won't
2079 * insist on full MB_CUR_MAX buffer to declare input like
2080 * "\xff\n",pause,"ls\n" invalid and thus won't lose "ls".
2081 *
2082 * Note: read_key sets errno to 0 on success.
2083 */
Ron Yorston23286902018-02-25 20:09:54 +01002084 IF_FEATURE_EDITING_WINCH(S.ok_to_redraw = 1;)
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002085 ic = read_key(STDIN_FILENO, read_key_buffer, timeout);
Ron Yorston23286902018-02-25 20:09:54 +01002086 IF_FEATURE_EDITING_WINCH(S.ok_to_redraw = 0;)
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002087 if (errno) {
Denys Vlasenko19158a82010-03-26 14:06:56 +01002088#if ENABLE_UNICODE_SUPPORT
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002089 if (errno == EAGAIN && unicode_idx != 0)
2090 goto pushback;
Denys Vlasenko1f6d2302009-10-29 03:45:26 +01002091#endif
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002092 break;
Denys Vlasenko4b7db4f2009-05-29 10:39:06 +02002093 }
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002094
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002095#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
2096 if ((int32_t)ic == KEYCODE_CURSOR_POS
Denys Vlasenkod83bbf42009-10-27 10:47:49 +01002097 && S.sent_ESC_br6n
Denys Vlasenko020f4062009-05-17 16:44:54 +02002098 ) {
Denys Vlasenkod83bbf42009-10-27 10:47:49 +01002099 S.sent_ESC_br6n = 0;
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002100 if (cursor == 0) { /* otherwise it may be bogus */
2101 int col = ((ic >> 32) & 0x7fff) - 1;
Denys Vlasenko7a180432013-08-19 16:44:05 +02002102 /*
2103 * Is col > cmdedit_prmt_len?
2104 * If yes (terminal says cursor is farther to the right
2105 * of where we think it should be),
2106 * the prompt wasn't printed starting at col 1,
2107 * there was additional text before it.
2108 */
2109 if ((int)(col - cmdedit_prmt_len) > 0) {
2110 /* Fix our understanding of current x position */
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002111 cmdedit_x += (col - cmdedit_prmt_len);
2112 while (cmdedit_x >= cmdedit_termw) {
2113 cmdedit_x -= cmdedit_termw;
2114 cmdedit_y++;
2115 }
Denys Vlasenko020f4062009-05-17 16:44:54 +02002116 }
2117 }
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002118 continue;
Denys Vlasenko020f4062009-05-17 16:44:54 +02002119 }
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002120#endif
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002121
Denys Vlasenko19158a82010-03-26 14:06:56 +01002122#if ENABLE_UNICODE_SUPPORT
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002123 if (unicode_status == UNICODE_ON) {
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002124 wchar_t wc;
2125
2126 if ((int32_t)ic < 0) /* KEYCODE_xxx */
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002127 break;
2128 // TODO: imagine sequence like: 0xff,<left-arrow>: we are currently losing 0xff...
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002129
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002130 unicode_buf[unicode_idx++] = ic;
2131 unicode_buf[unicode_idx] = '\0';
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002132 if (mbstowcs(&wc, unicode_buf, 1) != 1) {
2133 /* Not (yet?) a valid unicode char */
2134 if (unicode_idx < MB_CUR_MAX) {
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002135 timeout = 50;
2136 continue;
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002137 }
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002138 pushback:
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002139 /* Invalid sequence. Save all "bad bytes" except first */
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002140 read_key_ungets(read_key_buffer, unicode_buf + 1, unicode_idx - 1);
Tomas Heinricha659b812010-04-29 13:43:39 +02002141# if !ENABLE_UNICODE_PRESERVE_BROKEN
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002142 ic = CONFIG_SUBST_WCHAR;
Tomas Heinricha659b812010-04-29 13:43:39 +02002143# else
Tomas Heinrichb8909c52010-05-16 20:46:53 +02002144 ic = unicode_mark_raw_byte(unicode_buf[0]);
Tomas Heinricha659b812010-04-29 13:43:39 +02002145# endif
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002146 } else {
2147 /* Valid unicode char, return its code */
2148 ic = wc;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002149 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002150 }
2151#endif
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002152 break;
2153 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002154
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002155 return ic;
2156}
2157
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002158#if ENABLE_UNICODE_BIDI_SUPPORT
2159static int isrtl_str(void)
2160{
2161 int idx = cursor;
Tomas Heinrichaa167552010-03-26 13:13:24 +01002162
2163 while (idx < command_len && unicode_bidi_is_neutral_wchar(command_ps[idx]))
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002164 idx++;
Tomas Heinrichaa167552010-03-26 13:13:24 +01002165 return unicode_bidi_isrtl(command_ps[idx]);
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002166}
2167#else
2168# define isrtl_str() 0
2169#endif
2170
Paul Fox0f2dd9f2006-03-07 20:26:11 +00002171/* leave out the "vi-mode"-only case labels if vi editing isn't
2172 * configured. */
Denys Vlasenko13028922009-07-12 00:51:15 +02002173#define vi_case(caselabel) IF_FEATURE_EDITING_VI(case caselabel)
Paul Fox3f11b1b2005-08-04 19:04:46 +00002174
2175/* convert uppercase ascii to equivalent control char, for readability */
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002176#undef CTRL
2177#define CTRL(a) ((a) & ~0x40)
Paul Fox3f11b1b2005-08-04 19:04:46 +00002178
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002179enum {
2180 VI_CMDMODE_BIT = 0x40000000,
2181 /* 0x80000000 bit flags KEYCODE_xxx */
2182};
2183
2184#if ENABLE_FEATURE_REVERSE_SEARCH
2185/* Mimic readline Ctrl-R reverse history search.
2186 * When invoked, it shows the following prompt:
2187 * (reverse-i-search)'': user_input [cursor pos unchanged by Ctrl-R]
2188 * and typing results in search being performed:
2189 * (reverse-i-search)'tmp': cd /tmp [cursor under t in /tmp]
2190 * Search is performed by looking at progressively older lines in history.
2191 * Ctrl-R again searches for the next match in history.
2192 * Backspace deletes last matched char.
2193 * Control keys exit search and return to normal editing (at current history line).
2194 */
Denys Vlasenko84ea60e2017-08-02 17:27:28 +02002195static int32_t reverse_i_search(int timeout)
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002196{
2197 char match_buf[128]; /* for user input */
2198 char read_key_buffer[KEYCODE_BUFFER_SIZE];
2199 const char *matched_history_line;
2200 const char *saved_prompt;
Denys Vlasenko7a180432013-08-19 16:44:05 +02002201 unsigned saved_prmt_len;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002202 int32_t ic;
2203
2204 matched_history_line = NULL;
2205 read_key_buffer[0] = 0;
2206 match_buf[0] = '\0';
2207
2208 /* Save and replace the prompt */
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02002209 saved_prompt = prompt_last_line;
Denys Vlasenko7a180432013-08-19 16:44:05 +02002210 saved_prmt_len = cmdedit_prmt_len;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002211 goto set_prompt;
2212
2213 while (1) {
2214 int h;
2215 unsigned match_buf_len = strlen(match_buf);
2216
Denys Vlasenko84ea60e2017-08-02 17:27:28 +02002217//FIXME: correct timeout? (i.e. count it down?)
2218 ic = lineedit_read_key(read_key_buffer, timeout);
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002219
2220 switch (ic) {
2221 case CTRL('R'): /* searching for the next match */
2222 break;
2223
2224 case '\b':
2225 case '\x7f':
2226 /* Backspace */
2227 if (unicode_status == UNICODE_ON) {
2228 while (match_buf_len != 0) {
2229 uint8_t c = match_buf[--match_buf_len];
2230 if ((c & 0xc0) != 0x80) /* start of UTF-8 char? */
2231 break; /* yes */
2232 }
2233 } else {
2234 if (match_buf_len != 0)
2235 match_buf_len--;
2236 }
2237 match_buf[match_buf_len] = '\0';
2238 break;
2239
2240 default:
2241 if (ic < ' '
2242 || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
2243 || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
2244 ) {
2245 goto ret;
2246 }
2247
2248 /* Append this char */
2249#if ENABLE_UNICODE_SUPPORT
2250 if (unicode_status == UNICODE_ON) {
2251 mbstate_t mbstate = { 0 };
2252 char buf[MB_CUR_MAX + 1];
2253 int len = wcrtomb(buf, ic, &mbstate);
2254 if (len > 0) {
2255 buf[len] = '\0';
2256 if (match_buf_len + len < sizeof(match_buf))
2257 strcpy(match_buf + match_buf_len, buf);
2258 }
2259 } else
2260#endif
2261 if (match_buf_len < sizeof(match_buf) - 1) {
2262 match_buf[match_buf_len] = ic;
2263 match_buf[match_buf_len + 1] = '\0';
2264 }
2265 break;
2266 } /* switch (ic) */
2267
2268 /* Search in history for match_buf */
2269 h = state->cur_history;
2270 if (ic == CTRL('R'))
2271 h--;
2272 while (h >= 0) {
2273 if (state->history[h]) {
2274 char *match = strstr(state->history[h], match_buf);
2275 if (match) {
2276 state->cur_history = h;
2277 matched_history_line = state->history[h];
2278 command_len = load_string(matched_history_line);
2279 cursor = match - matched_history_line;
2280//FIXME: cursor position for Unicode case
2281
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02002282 free((char*)prompt_last_line);
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002283 set_prompt:
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02002284 prompt_last_line = xasprintf("(reverse-i-search)'%s': ", match_buf);
2285 cmdedit_prmt_len = unicode_strwidth(prompt_last_line);
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002286 goto do_redraw;
2287 }
2288 }
2289 h--;
2290 }
2291
2292 /* Not found */
2293 match_buf[match_buf_len] = '\0';
2294 beep();
2295 continue;
2296
2297 do_redraw:
2298 redraw(cmdedit_y, command_len - cursor);
2299 } /* while (1) */
2300
2301 ret:
2302 if (matched_history_line)
2303 command_len = load_string(matched_history_line);
2304
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02002305 free((char*)prompt_last_line);
2306 prompt_last_line = saved_prompt;
Denys Vlasenko7a180432013-08-19 16:44:05 +02002307 cmdedit_prmt_len = saved_prmt_len;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002308 redraw(cmdedit_y, command_len - cursor);
2309
2310 return ic;
2311}
2312#endif
2313
Denys Vlasenko23427a62018-12-08 15:45:46 +01002314#if ENABLE_FEATURE_EDITING_WINCH
Denys Vlasenko136fe9b2018-12-08 13:49:15 +01002315static void sigaction2(int sig, struct sigaction *act)
2316{
2317 // Grr... gcc 8.1.1:
2318 // "passing argument 3 to restrict-qualified parameter aliases with argument 2"
2319 // dance around that...
2320 struct sigaction *oact FIX_ALIASING;
2321 oact = act;
2322 sigaction(sig, act, oact);
2323}
Denys Vlasenko23427a62018-12-08 15:45:46 +01002324#endif
Denys Vlasenko136fe9b2018-12-08 13:49:15 +01002325
Denys Vlasenko5c2e81b2009-07-16 14:14:34 +02002326/* maxsize must be >= 2.
2327 * Returns:
Denis Vlasenko80667e32008-02-02 18:35:55 +00002328 * -1 on read errors or EOF, or on bare Ctrl-D,
2329 * 0 on ctrl-C (the line entered is still returned in 'command'),
Denys Vlasenko4b89d512016-11-25 03:41:03 +01002330 * (in both cases the cursor remains on the input line, '\n' is not printed)
Denis Vlasenko6a5377a2007-09-25 18:35:28 +00002331 * >0 length of input string, including terminating '\n'
2332 */
Denys Vlasenko84ea60e2017-08-02 17:27:28 +02002333int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize)
Erik Andersen13456d12000-03-16 08:09:57 +00002334{
Denys Vlasenkoaaaaaa52017-09-15 17:14:01 +02002335 int len, n;
Denys Vlasenko84ea60e2017-08-02 17:27:28 +02002336 int timeout;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002337#if ENABLE_FEATURE_TAB_COMPLETION
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02002338 smallint lastWasTab = 0;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002339#endif
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002340 smallint break_out = 0;
Denis Vlasenko38f63192007-01-22 09:03:07 +00002341#if ENABLE_FEATURE_EDITING_VI
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002342 smallint vi_cmdmode = 0;
Paul Fox3f11b1b2005-08-04 19:04:46 +00002343#endif
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002344 struct termios initial_settings;
2345 struct termios new_settings;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002346 char read_key_buffer[KEYCODE_BUFFER_SIZE];
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002347
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002348 INIT_S();
2349
Denys Vlasenkoaaaaaa52017-09-15 17:14:01 +02002350 n = get_termios_and_make_raw(STDIN_FILENO, &new_settings, &initial_settings, 0
2351 | TERMIOS_CLEAR_ISIG /* turn off INTR (ctrl-C), QUIT, SUSP */
2352 );
2353 if (n != 0 || (initial_settings.c_lflag & (ECHO|ICANON)) == ICANON) {
Denys Vlasenkod598a8d2014-12-10 17:22:13 +01002354 /* Happens when e.g. stty -echo was run before.
2355 * But if ICANON is not set, we don't come here.
2356 * (example: interactive python ^Z-backgrounded,
2357 * tty is still in "raw mode").
2358 */
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002359 parse_and_put_prompt(prompt);
Denys Vlasenko038a9772016-11-28 01:10:16 +01002360 fflush_all();
Denis Vlasenko9cb220b2007-12-09 10:03:28 +00002361 if (fgets(command, maxsize, stdin) == NULL)
2362 len = -1; /* EOF or error */
2363 else
2364 len = strlen(command);
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002365 DEINIT_S();
2366 return len;
Denis Vlasenko037576d2007-10-20 18:30:38 +00002367 }
2368
Denys Vlasenko28055022010-01-04 20:49:58 +01002369 init_unicode();
Denys Vlasenko42a8fd02009-07-11 21:36:13 +02002370
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002371// FIXME: audit & improve this
Denis Vlasenkoe8a07882007-06-10 15:08:44 +00002372 if (maxsize > MAX_LINELEN)
2373 maxsize = MAX_LINELEN;
Denys Vlasenko044b1802009-07-12 02:50:35 +02002374 S.maxsize = maxsize;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002375
Denys Vlasenko84ea60e2017-08-02 17:27:28 +02002376 timeout = -1;
2377 /* Make state->flags == 0 if st is NULL.
2378 * With zeroed flags, no other fields are ever referenced.
2379 */
2380 state = (line_input_t*) &const_int_0;
2381 if (st) {
2382 state = st;
2383 timeout = st->timeout;
2384 }
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02002385#if MAX_HISTORY > 0
Denys Vlasenko779f96a2019-02-04 16:16:30 +01002386 if (state->flags & DO_HISTORY) {
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02002387# if ENABLE_FEATURE_EDITING_SAVEHISTORY
Denys Vlasenko779f96a2019-02-04 16:16:30 +01002388 if (state->hist_file)
2389 if (state->cnt_history == 0)
2390 load_history(state);
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02002391# endif
Denis Vlasenko3c385cd2008-11-02 00:41:05 +00002392 state->cur_history = state->cnt_history;
Denys Vlasenko779f96a2019-02-04 16:16:30 +01002393 }
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02002394#endif
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002395
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002396 /* prepare before init handlers */
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +00002397 cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002398 command_len = 0;
Denys Vlasenko19158a82010-03-26 14:06:56 +01002399#if ENABLE_UNICODE_SUPPORT
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002400 command_ps = xzalloc(maxsize * sizeof(command_ps[0]));
2401#else
Mark Whitley4e338752001-01-26 20:42:23 +00002402 command_ps = command;
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +00002403 command[0] = '\0';
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002404#endif
2405#define command command_must_not_be_used
Mark Whitley4e338752001-01-26 20:42:23 +00002406
Denis Vlasenko202ac502008-11-05 13:20:58 +00002407 tcsetattr_stdin_TCSANOW(&new_settings);
Erik Andersen13456d12000-03-16 08:09:57 +00002408
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02002409#if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko6258fd32007-01-22 07:30:26 +00002410 {
2411 struct passwd *entry;
2412
2413 entry = getpwuid(geteuid());
2414 if (entry) {
2415 user_buf = xstrdup(entry->pw_name);
2416 home_pwd_buf = xstrdup(entry->pw_dir);
2417 }
2418 }
2419#endif
Denis Vlasenko682ad302008-09-27 01:28:56 +00002420
2421#if 0
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02002422 for (i = 0; i <= state->max_history; i++)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002423 bb_error_msg("history[%d]:'%s'", i, state->history[i]);
Denis Vlasenko682ad302008-09-27 01:28:56 +00002424 bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
2425#endif
2426
Denys Vlasenko0a677222017-11-08 13:38:12 +01002427 /* Get width (before printing prompt) */
2428 cmdedit_termw = get_terminal_width(STDIN_FILENO);
Denys Vlasenko13ad9062009-11-11 03:19:30 +01002429 /* Print out the command prompt, optionally ask where cursor is */
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002430 parse_and_put_prompt(prompt);
Denys Vlasenko13ad9062009-11-11 03:19:30 +01002431 ask_terminal();
Eric Andersenb3dc3b82001-01-04 11:08:45 +00002432
Ron Yorston23286902018-02-25 20:09:54 +01002433#if ENABLE_FEATURE_EDITING_WINCH
Alexey Fomenko232ebaa2011-05-20 04:26:29 +02002434 /* Install window resize handler (NB: after *all* init is complete) */
Denys Vlasenkobff71d32016-11-27 22:25:07 +01002435 S.SIGWINCH_handler.sa_handler = win_changed;
2436 S.SIGWINCH_handler.sa_flags = SA_RESTART;
Denys Vlasenko136fe9b2018-12-08 13:49:15 +01002437 sigaction2(SIGWINCH, &S.SIGWINCH_handler);
Ron Yorston23286902018-02-25 20:09:54 +01002438#endif
Denys Vlasenkoc396fe62009-05-17 19:28:14 +02002439 read_key_buffer[0] = 0;
Erik Andersenc7c634b2000-03-19 05:28:55 +00002440 while (1) {
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002441 /*
2442 * The emacs and vi modes share much of the code in the big
2443 * command loop. Commands entered when in vi's command mode
2444 * (aka "escape mode") get an extra bit added to distinguish
2445 * them - this keeps them from being self-inserted. This
2446 * clutters the big switch a bit, but keeps all the code
2447 * in one place.
2448 */
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002449 int32_t ic, ic_raw;
Ron Yorston23286902018-02-25 20:09:54 +01002450#if ENABLE_FEATURE_EDITING_WINCH
Denys Vlasenkobff71d32016-11-27 22:25:07 +01002451 unsigned count;
2452
2453 count = S.SIGWINCH_count;
2454 if (S.SIGWINCH_saved != count) {
2455 S.SIGWINCH_saved = count;
Denys Vlasenko038a9772016-11-28 01:10:16 +01002456 cmdedit_setwidth();
Denys Vlasenkobff71d32016-11-27 22:25:07 +01002457 }
Ron Yorston23286902018-02-25 20:09:54 +01002458#endif
Denys Vlasenko66c5b122011-02-08 05:07:02 +01002459 ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
Paul Fox0f2dd9f2006-03-07 20:26:11 +00002460
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002461#if ENABLE_FEATURE_REVERSE_SEARCH
2462 again:
2463#endif
Denis Vlasenko38f63192007-01-22 09:03:07 +00002464#if ENABLE_FEATURE_EDITING_VI
Paul Fox3f11b1b2005-08-04 19:04:46 +00002465 newdelflag = 1;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002466 if (vi_cmdmode) {
2467 /* btw, since KEYCODE_xxx are all < 0, this doesn't
2468 * change ic if it contains one of them: */
2469 ic |= VI_CMDMODE_BIT;
2470 }
Paul Fox3f11b1b2005-08-04 19:04:46 +00002471#endif
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002472
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002473 switch (ic) {
Erik Andersenf0657d32000-04-12 17:49:52 +00002474 case '\n':
2475 case '\r':
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002476 vi_case('\n'|VI_CMDMODE_BIT:)
2477 vi_case('\r'|VI_CMDMODE_BIT:)
Erik Andersenf0657d32000-04-12 17:49:52 +00002478 /* Enter */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002479 goto_new_line();
Erik Andersenf0657d32000-04-12 17:49:52 +00002480 break_out = 1;
2481 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002482 case CTRL('A'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002483 vi_case('0'|VI_CMDMODE_BIT:)
Erik Andersenc7c634b2000-03-19 05:28:55 +00002484 /* Control-a -- Beginning of line */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002485 input_backward(cursor);
Mark Whitley4e338752001-01-26 20:42:23 +00002486 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002487 case CTRL('B'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002488 vi_case('h'|VI_CMDMODE_BIT:)
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002489 vi_case('\b'|VI_CMDMODE_BIT:) /* ^H */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002490 vi_case('\x7f'|VI_CMDMODE_BIT:) /* DEL */
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002491 input_backward(1); /* Move back one character */
Erik Andersenf0657d32000-04-12 17:49:52 +00002492 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002493 case CTRL('E'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002494 vi_case('$'|VI_CMDMODE_BIT:)
Erik Andersenc7c634b2000-03-19 05:28:55 +00002495 /* Control-e -- End of line */
Denys Vlasenko94043e82010-05-11 14:49:13 +02002496 put_till_end_and_adv_cursor();
Erik Andersenc7c634b2000-03-19 05:28:55 +00002497 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002498 case CTRL('F'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002499 vi_case('l'|VI_CMDMODE_BIT:)
2500 vi_case(' '|VI_CMDMODE_BIT:)
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002501 input_forward(); /* Move forward one character */
Erik Andersenc7c634b2000-03-19 05:28:55 +00002502 break;
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002503 case '\b': /* ^H */
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002504 case '\x7f': /* DEL */
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002505 if (!isrtl_str())
2506 input_backspace();
2507 else
2508 input_delete(0);
2509 break;
2510 case KEYCODE_DELETE:
2511 if (!isrtl_str())
2512 input_delete(0);
2513 else
2514 input_backspace();
Erik Andersenc7c634b2000-03-19 05:28:55 +00002515 break;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002516#if ENABLE_FEATURE_TAB_COMPLETION
Erik Andersenc7c634b2000-03-19 05:28:55 +00002517 case '\t':
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002518 input_tab(&lastWasTab);
Erik Andersenc7c634b2000-03-19 05:28:55 +00002519 break;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002520#endif
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002521 case CTRL('K'):
Eric Andersenc470f442003-07-28 09:56:35 +00002522 /* Control-k -- clear to end of line */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002523 command_ps[cursor] = BB_NUL;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002524 command_len = cursor;
Denys Vlasenko94043e82010-05-11 14:49:13 +02002525 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
Eric Andersen65a07302002-04-13 13:26:49 +00002526 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002527 case CTRL('L'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002528 vi_case(CTRL('L')|VI_CMDMODE_BIT:)
Eric Andersen27bb7902003-12-23 20:24:51 +00002529 /* Control-l -- clear screen */
Avi Halachmi0fd5dbb2017-10-12 16:38:35 +02002530 /* cursor to top,left; clear to the end of screen */
2531 printf(ESC"[H" ESC"[J");
2532 draw_full(command_len - cursor);
Eric Andersenf1f2bd02001-12-21 11:20:15 +00002533 break;
Denis Vlasenko9d4533e2006-11-02 22:09:37 +00002534#if MAX_HISTORY > 0
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002535 case CTRL('N'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002536 vi_case(CTRL('N')|VI_CMDMODE_BIT:)
2537 vi_case('j'|VI_CMDMODE_BIT:)
Erik Andersenf0657d32000-04-12 17:49:52 +00002538 /* Control-n -- Get next command in history */
Glenn L McGrath062c74f2002-11-27 09:29:49 +00002539 if (get_next_history())
Erik Andersenf0657d32000-04-12 17:49:52 +00002540 goto rewrite_line;
Erik Andersenf0657d32000-04-12 17:49:52 +00002541 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002542 case CTRL('P'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002543 vi_case(CTRL('P')|VI_CMDMODE_BIT:)
2544 vi_case('k'|VI_CMDMODE_BIT:)
Erik Andersenf0657d32000-04-12 17:49:52 +00002545 /* Control-p -- Get previous command from history */
Denis Vlasenko682ad302008-09-27 01:28:56 +00002546 if (get_previous_history())
Erik Andersenf0657d32000-04-12 17:49:52 +00002547 goto rewrite_line;
Erik Andersenc7c634b2000-03-19 05:28:55 +00002548 break;
Glenn L McGrath062c74f2002-11-27 09:29:49 +00002549#endif
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002550 case CTRL('U'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002551 vi_case(CTRL('U')|VI_CMDMODE_BIT:)
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002552 /* Control-U -- Clear line before cursor */
2553 if (cursor) {
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002554 command_len -= cursor;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002555 memmove(command_ps, command_ps + cursor,
2556 (command_len + 1) * sizeof(command_ps[0]));
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002557 redraw(cmdedit_y, command_len);
Erik Andersenc7c634b2000-03-19 05:28:55 +00002558 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002559 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002560 case CTRL('W'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002561 vi_case(CTRL('W')|VI_CMDMODE_BIT:)
Eric Andersen27bb7902003-12-23 20:24:51 +00002562 /* Control-W -- Remove the last word */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002563 while (cursor > 0 && BB_isspace(command_ps[cursor-1]))
Eric Andersen27bb7902003-12-23 20:24:51 +00002564 input_backspace();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002565 while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
Eric Andersen27bb7902003-12-23 20:24:51 +00002566 input_backspace();
2567 break;
Rostislav Skudnov2e4ef382016-11-24 15:04:00 +01002568 case KEYCODE_ALT_D: {
2569 /* Delete word forward */
2570 int nc, sc = cursor;
2571 ctrl_right();
2572 nc = cursor - sc;
2573 input_backward(nc);
2574 while (--nc >= 0)
2575 input_delete(1);
2576 break;
2577 }
2578 case KEYCODE_ALT_BACKSPACE: {
2579 /* Delete word backward */
2580 int sc = cursor;
2581 ctrl_left();
2582 while (sc-- > cursor)
2583 input_delete(1);
2584 break;
2585 }
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002586#if ENABLE_FEATURE_REVERSE_SEARCH
2587 case CTRL('R'):
Denys Vlasenko84ea60e2017-08-02 17:27:28 +02002588 ic = ic_raw = reverse_i_search(timeout);
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002589 goto again;
2590#endif
Denis Vlasenko00cdbd82007-01-21 19:21:21 +00002591
Denis Vlasenko38f63192007-01-22 09:03:07 +00002592#if ENABLE_FEATURE_EDITING_VI
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002593 case 'i'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002594 vi_cmdmode = 0;
2595 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002596 case 'I'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002597 input_backward(cursor);
2598 vi_cmdmode = 0;
2599 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002600 case 'a'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002601 input_forward();
2602 vi_cmdmode = 0;
2603 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002604 case 'A'|VI_CMDMODE_BIT:
Denys Vlasenko94043e82010-05-11 14:49:13 +02002605 put_till_end_and_adv_cursor();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002606 vi_cmdmode = 0;
2607 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002608 case 'x'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002609 input_delete(1);
2610 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002611 case 'X'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002612 if (cursor > 0) {
2613 input_backward(1);
2614 input_delete(1);
2615 }
2616 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002617 case 'W'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002618 vi_Word_motion(1);
Paul Fox3f11b1b2005-08-04 19:04:46 +00002619 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002620 case 'w'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002621 vi_word_motion(1);
Paul Fox3f11b1b2005-08-04 19:04:46 +00002622 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002623 case 'E'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002624 vi_End_motion();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002625 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002626 case 'e'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002627 vi_end_motion();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002628 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002629 case 'B'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002630 vi_Back_motion();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002631 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002632 case 'b'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002633 vi_back_motion();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002634 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002635 case 'C'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002636 vi_cmdmode = 0;
2637 /* fall through */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002638 case 'D'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002639 goto clear_to_eol;
2640
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002641 case 'c'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002642 vi_cmdmode = 0;
2643 /* fall through */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002644 case 'd'|VI_CMDMODE_BIT: {
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002645 int nc, sc;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002646
Denys Vlasenko66c5b122011-02-08 05:07:02 +01002647 ic = lineedit_read_key(read_key_buffer, timeout);
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002648 if (errno) /* error */
Denys Vlasenkod55f5992010-09-07 18:40:53 +02002649 goto return_error_indicator;
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002650 if (ic == ic_raw) { /* "cc", "dd" */
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002651 input_backward(cursor);
2652 goto clear_to_eol;
2653 break;
2654 }
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002655
2656 sc = cursor;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002657 switch (ic) {
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002658 case 'w':
2659 case 'W':
2660 case 'e':
2661 case 'E':
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002662 switch (ic) {
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002663 case 'w': /* "dw", "cw" */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002664 vi_word_motion(vi_cmdmode);
Denis Vlasenko92758142006-10-03 19:56:34 +00002665 break;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002666 case 'W': /* 'dW', 'cW' */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002667 vi_Word_motion(vi_cmdmode);
Denis Vlasenko92758142006-10-03 19:56:34 +00002668 break;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002669 case 'e': /* 'de', 'ce' */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002670 vi_end_motion();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002671 input_forward();
Denis Vlasenko92758142006-10-03 19:56:34 +00002672 break;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002673 case 'E': /* 'dE', 'cE' */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002674 vi_End_motion();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002675 input_forward();
Denis Vlasenko92758142006-10-03 19:56:34 +00002676 break;
2677 }
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002678 nc = cursor;
2679 input_backward(cursor - sc);
2680 while (nc-- > cursor)
2681 input_delete(1);
2682 break;
2683 case 'b': /* "db", "cb" */
2684 case 'B': /* implemented as B */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002685 if (ic == 'b')
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002686 vi_back_motion();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002687 else
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002688 vi_Back_motion();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002689 while (sc-- > cursor)
2690 input_delete(1);
2691 break;
2692 case ' ': /* "d ", "c " */
2693 input_delete(1);
2694 break;
2695 case '$': /* "d$", "c$" */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002696 clear_to_eol:
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002697 while (cursor < command_len)
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002698 input_delete(1);
2699 break;
Paul Fox3f11b1b2005-08-04 19:04:46 +00002700 }
2701 break;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002702 }
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002703 case 'p'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002704 input_forward();
2705 /* fallthrough */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002706 case 'P'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002707 put();
2708 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002709 case 'r'|VI_CMDMODE_BIT:
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002710//FIXME: unicode case?
Denys Vlasenko66c5b122011-02-08 05:07:02 +01002711 ic = lineedit_read_key(read_key_buffer, timeout);
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002712 if (errno) /* error */
Denys Vlasenkod55f5992010-09-07 18:40:53 +02002713 goto return_error_indicator;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002714 if (ic < ' ' || ic > 255) {
Paul Fox3f11b1b2005-08-04 19:04:46 +00002715 beep();
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002716 } else {
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002717 command_ps[cursor] = ic;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002718 bb_putchar(ic);
Denis Vlasenko4daad902007-09-27 10:20:47 +00002719 bb_putchar('\b');
Paul Fox3f11b1b2005-08-04 19:04:46 +00002720 }
2721 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002722 case '\x1b': /* ESC */
2723 if (state->flags & VI_MODE) {
2724 /* insert mode --> command mode */
2725 vi_cmdmode = 1;
2726 input_backward(1);
2727 }
2728 break;
Denis Vlasenko7f1dc212006-12-19 01:10:25 +00002729#endif /* FEATURE_COMMAND_EDITING_VI */
Paul Fox0f2dd9f2006-03-07 20:26:11 +00002730
Denis Vlasenko9d4533e2006-11-02 22:09:37 +00002731#if MAX_HISTORY > 0
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002732 case KEYCODE_UP:
2733 if (get_previous_history())
2734 goto rewrite_line;
2735 beep();
2736 break;
2737 case KEYCODE_DOWN:
2738 if (!get_next_history())
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002739 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002740 rewrite_line:
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002741 /* Rewrite the line with the selected history item */
2742 /* change command */
Denys Vlasenko90a99042009-09-06 02:36:23 +02002743 command_len = load_string(state->history[state->cur_history] ?
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002744 state->history[state->cur_history] : "");
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002745 /* redraw and go to eol (bol, in vi) */
2746 redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
2747 break;
Glenn L McGrath062c74f2002-11-27 09:29:49 +00002748#endif
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002749 case KEYCODE_RIGHT:
2750 input_forward();
2751 break;
2752 case KEYCODE_LEFT:
2753 input_backward(1);
2754 break;
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01002755 case KEYCODE_CTRL_LEFT:
Denys Vlasenko9ce09bc2011-11-03 13:28:22 +01002756 case KEYCODE_ALT_LEFT: /* bash doesn't do it */
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01002757 ctrl_left();
2758 break;
2759 case KEYCODE_CTRL_RIGHT:
Denys Vlasenko9ce09bc2011-11-03 13:28:22 +01002760 case KEYCODE_ALT_RIGHT: /* bash doesn't do it */
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01002761 ctrl_right();
2762 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002763 case KEYCODE_HOME:
2764 input_backward(cursor);
2765 break;
2766 case KEYCODE_END:
Denys Vlasenko94043e82010-05-11 14:49:13 +02002767 put_till_end_and_adv_cursor();
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002768 break;
Erik Andersenc7c634b2000-03-19 05:28:55 +00002769
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002770 default:
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002771 if (initial_settings.c_cc[VINTR] != 0
2772 && ic_raw == initial_settings.c_cc[VINTR]
2773 ) {
2774 /* Ctrl-C (usually) - stop gathering input */
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002775 command_len = 0;
2776 break_out = -1; /* "do not append '\n'" */
2777 break;
2778 }
2779 if (initial_settings.c_cc[VEOF] != 0
2780 && ic_raw == initial_settings.c_cc[VEOF]
2781 ) {
2782 /* Ctrl-D (usually) - delete one character,
2783 * or exit if len=0 and no chars to delete */
2784 if (command_len == 0) {
2785 errno = 0;
Denys Vlasenkod55f5992010-09-07 18:40:53 +02002786
2787 case -1: /* error (e.g. EIO when tty is destroyed) */
2788 IF_FEATURE_EDITING_VI(return_error_indicator:)
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002789 break_out = command_len = -1;
2790 break;
2791 }
2792 input_delete(0);
2793 break;
2794 }
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002795// /* Control-V -- force insert of next char */
2796// if (c == CTRL('V')) {
2797// if (safe_read(STDIN_FILENO, &c, 1) < 1)
Denys Vlasenkod55f5992010-09-07 18:40:53 +02002798// goto return_error_indicator;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002799// if (c == 0) {
2800// beep();
2801// break;
2802// }
2803// }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002804 if (ic < ' '
Denys Vlasenko19158a82010-03-26 14:06:56 +01002805 || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
2806 || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002807 ) {
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002808 /* If VI_CMDMODE_BIT is set, ic is >= 256
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002809 * and vi mode ignores unexpected chars.
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002810 * Otherwise, we are here if ic is a
2811 * control char or an unhandled ESC sequence,
2812 * which is also ignored.
2813 */
2814 break;
2815 }
2816 if ((int)command_len >= (maxsize - 2)) {
2817 /* Not enough space for the char and EOL */
2818 break;
Paul Fox84bbac52008-01-11 16:50:08 +00002819 }
Denis Vlasenko00cdbd82007-01-21 19:21:21 +00002820
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002821 command_len++;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002822 if (cursor == (command_len - 1)) {
2823 /* We are at the end, append */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002824 command_ps[cursor] = ic;
2825 command_ps[cursor + 1] = BB_NUL;
Denys Vlasenko94043e82010-05-11 14:49:13 +02002826 put_cur_glyph_and_inc_cursor();
Tomas Heinrichaa167552010-03-26 13:13:24 +01002827 if (unicode_bidi_isrtl(ic))
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002828 input_backward(1);
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002829 } else {
2830 /* In the middle, insert */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002831 int sc = cursor;
Erik Andersenc7c634b2000-03-19 05:28:55 +00002832
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002833 memmove(command_ps + sc + 1, command_ps + sc,
2834 (command_len - sc) * sizeof(command_ps[0]));
2835 command_ps[sc] = ic;
Tomas Heinrichaa167552010-03-26 13:13:24 +01002836 /* is right-to-left char, or neutral one (e.g. comma) was just added to rtl text? */
2837 if (!isrtl_str())
2838 sc++; /* no */
Denys Vlasenko94043e82010-05-11 14:49:13 +02002839 put_till_end_and_adv_cursor();
Mark Whitley4e338752001-01-26 20:42:23 +00002840 /* to prev x pos + 1 */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002841 input_backward(cursor - sc);
Erik Andersenc7c634b2000-03-19 05:28:55 +00002842 }
Erik Andersenc7c634b2000-03-19 05:28:55 +00002843 break;
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002844 } /* switch (ic) */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002845
2846 if (break_out)
Erik Andersenc7c634b2000-03-19 05:28:55 +00002847 break;
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002848
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002849#if ENABLE_FEATURE_TAB_COMPLETION
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002850 if (ic_raw != '\t')
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02002851 lastWasTab = 0;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002852#endif
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002853 } /* while (1) */
Erik Andersenc7c634b2000-03-19 05:28:55 +00002854
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002855#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
Denys Vlasenkod83bbf42009-10-27 10:47:49 +01002856 if (S.sent_ESC_br6n) {
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002857 /* "sleep 1; busybox ash" + hold [Enter] to trigger.
2858 * We sent "ESC [ 6 n", but got '\n' first, and
2859 * KEYCODE_CURSOR_POS response is now buffered from terminal.
2860 * It's bad already and not much can be done with it
2861 * (it _will_ be visible for the next process to read stdin),
2862 * but without this delay it even shows up on the screen
2863 * as garbage because we restore echo settings with tcsetattr
2864 * before it comes in. UGLY!
2865 */
2866 usleep(20*1000);
2867 }
2868#endif
2869
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02002870/* End of bug-catching "command_must_not_be_used" trick */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002871#undef command
2872
Denys Vlasenko19158a82010-03-26 14:06:56 +01002873#if ENABLE_UNICODE_SUPPORT
Denys Vlasenko2f3f09c2009-09-29 00:00:12 +02002874 command[0] = '\0';
2875 if (command_len > 0)
2876 command_len = save_string(command, maxsize - 1);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002877 free(command_ps);
2878#endif
2879
Flemming Madsend96ffda2013-04-07 18:47:24 +02002880 if (command_len > 0) {
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002881 remember_in_history(command);
Flemming Madsend96ffda2013-04-07 18:47:24 +02002882 }
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002883
Eric Andersen27bb7902003-12-23 20:24:51 +00002884 if (break_out > 0) {
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002885 command[command_len++] = '\n';
2886 command[command_len] = '\0';
Eric Andersen044228d2001-07-17 01:12:36 +00002887 }
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002888
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002889#if ENABLE_FEATURE_TAB_COMPLETION
Denis Vlasenko5592fac2007-01-21 19:19:46 +00002890 free_tab_completion_data();
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002891#endif
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002892
Denis Vlasenko6258fd32007-01-22 07:30:26 +00002893 /* restore initial_settings */
Denis Vlasenko202ac502008-11-05 13:20:58 +00002894 tcsetattr_stdin_TCSANOW(&initial_settings);
Ron Yorston23286902018-02-25 20:09:54 +01002895#if ENABLE_FEATURE_EDITING_WINCH
Denis Vlasenko6258fd32007-01-22 07:30:26 +00002896 /* restore SIGWINCH handler */
Denys Vlasenkobff71d32016-11-27 22:25:07 +01002897 sigaction_set(SIGWINCH, &S.SIGWINCH_handler);
Ron Yorston23286902018-02-25 20:09:54 +01002898#endif
Denys Vlasenko8131eea2009-11-02 14:19:51 +01002899 fflush_all();
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002900
Denis Vlasenkof31c3b62008-08-20 00:46:32 +00002901 len = command_len;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002902 DEINIT_S();
2903
Denis Vlasenkof31c3b62008-08-20 00:46:32 +00002904 return len; /* can't return command_len, DEINIT_S() destroys it */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002905}
2906
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02002907#else /* !FEATURE_EDITING */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002908
2909#undef read_line_input
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +00002910int FAST_FUNC read_line_input(const char* prompt, char* command, int maxsize)
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002911{
2912 fputs(prompt, stdout);
Denys Vlasenko8131eea2009-11-02 14:19:51 +01002913 fflush_all();
Denys Vlasenkob2320372012-09-27 16:03:49 +02002914 if (!fgets(command, maxsize, stdin))
2915 return -1;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002916 return strlen(command);
Eric Andersen501c88b2000-07-28 15:14:45 +00002917}
2918
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02002919#endif /* !FEATURE_EDITING */
Eric Andersen501c88b2000-07-28 15:14:45 +00002920
2921
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002922/*
2923 * Testing
2924 */
2925
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002926#ifdef TEST
2927
Eric Andersenf9ff8a72001-03-15 20:51:09 +00002928#include <locale.h>
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002929
2930const char *applet_name = "debug stuff usage";
Eric Andersenf9ff8a72001-03-15 20:51:09 +00002931
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002932int main(int argc, char **argv)
2933{
Denis Vlasenkoe8a07882007-06-10 15:08:44 +00002934 char buff[MAX_LINELEN];
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002935 char *prompt =
Denis Vlasenko38f63192007-01-22 09:03:07 +00002936#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002937 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
2938 "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
Denys Vlasenko8187e012017-09-13 22:48:30 +02002939 "\\!\\[\\e[36;1m\\]\\$ \\[\\E[m\\]";
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002940#else
2941 "% ";
2942#endif
2943
Denis Vlasenko7f1dc212006-12-19 01:10:25 +00002944 while (1) {
Eric Andersenb3d6e2d2001-03-13 22:57:56 +00002945 int l;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002946 l = read_line_input(prompt, buff);
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002947 if (l <= 0 || buff[l-1] != '\n')
Eric Andersen27bb7902003-12-23 20:24:51 +00002948 break;
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02002949 buff[l-1] = '\0';
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002950 printf("*** read_line_input() returned line =%s=\n", buff);
Eric Andersen7467c8d2001-07-12 20:26:32 +00002951 }
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002952 printf("*** read_line_input() detect ^D\n");
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002953 return 0;
2954}
2955
Eric Andersenc470f442003-07-28 09:56:35 +00002956#endif /* TEST */