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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 */
16
17/*
Denis Vlasenko78ff8192008-06-28 21:03:43 +000018 * Usage and known bugs:
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010019 * Terminal key codes are not extensive, more needs to be added.
20 * This version was created on Debian GNU/Linux 2.x.
Denis Vlasenko78ff8192008-06-28 21:03:43 +000021 * Delete, Backspace, Home, End, and the arrow keys were tested
22 * to work in an Xterm and console. Ctrl-A also works as Home.
23 * Ctrl-E also works as End.
24 *
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010025 * The following readline-like commands are not implemented:
26 * ESC-b -- Move back one word
27 * ESC-f -- Move forward one word
28 * ESC-d -- Delete forward one word
29 * CTL-t -- Transpose two characters
30 *
Denis Vlasenko78ff8192008-06-28 21:03:43 +000031 * lineedit does not know that the terminal escape sequences do not
32 * take up space on the screen. The redisplay code assumes, unless
33 * told otherwise, that each character in the prompt is a printable
34 * character that takes up one character position on the screen.
35 * You need to tell lineedit that some sequences of characters
36 * in the prompt take up no screen space. Compatibly with readline,
37 * use the \[ escape to begin a sequence of non-printing characters,
38 * and the \] escape to signal the end of such a sequence. Example:
39 *
40 * PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +020041 *
42 * Unicode in PS1 is not fully supported: prompt length calulation is wrong,
43 * resulting in line wrap problems with long (multi-line) input.
44 *
45 * Multi-line PS1 (e.g. PS1="\n[\w]\n$ ") has problems with history
46 * browsing: up/down arrows result in scrolling.
47 * It stems from simplistic "cmdedit_y = cmdedit_prmt_len / cmdedit_termw"
48 * calculation of how many lines the prompt takes.
Erik Andersen13456d12000-03-16 08:09:57 +000049 */
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000050#include "libbb.h"
Denys Vlasenko42a8fd02009-07-11 21:36:13 +020051#include "unicode.h"
Alexey Fomenko232ebaa2011-05-20 04:26:29 +020052#ifndef _POSIX_VDISABLE
53# define _POSIX_VDISABLE '\0'
54#endif
55
Glenn L McGrath475820c2004-01-22 12:42:23 +000056
Glenn L McGrath3b251852004-01-03 12:07:32 +000057#ifdef TEST
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020058# define ENABLE_FEATURE_EDITING 0
59# define ENABLE_FEATURE_TAB_COMPLETION 0
60# define ENABLE_FEATURE_USERNAME_COMPLETION 0
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020061#endif
Eric Andersen5f2c79d2001-02-16 18:36:04 +000062
Eric Andersen5165fbe2001-02-20 06:42:29 +000063
Denis Vlasenko82b39e82007-01-21 19:18:19 +000064/* Entire file (except TESTing part) sits inside this #if */
Denis Vlasenko38f63192007-01-22 09:03:07 +000065#if ENABLE_FEATURE_EDITING
Erik Andersen13456d12000-03-16 08:09:57 +000066
Denis Vlasenko82b39e82007-01-21 19:18:19 +000067
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +020068#define ENABLE_USERNAME_OR_HOMEDIR \
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +000069 (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +020070#define IF_USERNAME_OR_HOMEDIR(...)
71#if ENABLE_USERNAME_OR_HOMEDIR
72# undef IF_USERNAME_OR_HOMEDIR
73# define IF_USERNAME_OR_HOMEDIR(...) __VA_ARGS__
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +000074#endif
Eric Andersen5f2c79d2001-02-16 18:36:04 +000075
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020076
77#undef CHAR_T
Denys Vlasenko19158a82010-03-26 14:06:56 +010078#if ENABLE_UNICODE_SUPPORT
Tomas Heinricha659b812010-04-29 13:43:39 +020079# define BB_NUL ((wchar_t)0)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020080# define CHAR_T wchar_t
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010081static bool BB_isspace(CHAR_T c) { return ((unsigned)c < 256 && isspace(c)); }
Denys Vlasenko31e2e7b2009-12-12 02:42:35 +010082# if ENABLE_FEATURE_EDITING_VI
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010083static bool BB_isalnum(CHAR_T c) { return ((unsigned)c < 256 && isalnum(c)); }
Denys Vlasenko31e2e7b2009-12-12 02:42:35 +010084# endif
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +010085static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +020086# undef isspace
87# undef isalnum
88# undef ispunct
89# undef isprint
90# define isspace isspace_must_not_be_used
91# define isalnum isalnum_must_not_be_used
92# define ispunct ispunct_must_not_be_used
93# define isprint isprint_must_not_be_used
94#else
95# define BB_NUL '\0'
96# define CHAR_T char
97# define BB_isspace(c) isspace(c)
98# define BB_isalnum(c) isalnum(c)
99# define BB_ispunct(c) ispunct(c)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200100#endif
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200101#if ENABLE_UNICODE_PRESERVE_BROKEN
102# define unicode_mark_raw_byte(wc) ((wc) | 0x20000000)
103# define unicode_is_raw_byte(wc) ((wc) & 0x20000000)
104#else
105# define unicode_is_raw_byte(wc) 0
106#endif
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200107
108
Marek Polacek7b181072010-10-28 21:34:56 +0200109#define ESC "\033"
110
111#define SEQ_CLEAR_TILL_END_OF_SCREEN ESC"[J"
112//#define SEQ_CLEAR_TILL_END_OF_LINE ESC"[K"
Tomas Heinricha659b812010-04-29 13:43:39 +0200113
114
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000115enum {
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000116 MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0
Denis Vlasenko6b404432008-01-07 16:13:14 +0000117 ? CONFIG_FEATURE_EDITING_MAX_LEN
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000118 : 0x7ff0
119};
Robert Griebl350d26b2002-12-03 22:45:46 +0000120
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200121#if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000122static const char null_str[] ALIGN1 = "";
123#endif
Erik Andersen1d1d9502000-04-21 01:26:49 +0000124
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000125/* We try to minimize both static and stack usage. */
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000126struct lineedit_statics {
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000127 line_input_t *state;
Erik Andersen8ea7d8c2000-05-20 00:40:08 +0000128
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000129 volatile unsigned cmdedit_termw; /* = 80; */ /* actual terminal width */
130 sighandler_t previous_SIGWINCH_handler;
Mark Whitley4e338752001-01-26 20:42:23 +0000131
Denys Vlasenko020f4062009-05-17 16:44:54 +0200132 unsigned cmdedit_x; /* real x (col) terminal position */
133 unsigned cmdedit_y; /* pseudoreal y (row) terminal position */
Denis Vlasenkob267ed92008-05-25 21:52:03 +0000134 unsigned cmdedit_prmt_len; /* length of prompt (without colors etc) */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000135
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000136 unsigned cursor;
Denys Vlasenko2f3f09c2009-09-29 00:00:12 +0200137 int command_len; /* must be signed */
138 /* signed maxsize: we want x in "if (x > S.maxsize)"
Denys Vlasenko044b1802009-07-12 02:50:35 +0200139 * to _not_ be promoted to unsigned */
140 int maxsize;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200141 CHAR_T *command_ps;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000142
143 const char *cmdedit_prompt;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000144
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200145#if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000146 char *user_buf;
147 char *home_pwd_buf; /* = (char*)null_str; */
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000148#endif
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000149
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000150#if ENABLE_FEATURE_TAB_COMPLETION
151 char **matches;
152 unsigned num_matches;
153#endif
154
155#if ENABLE_FEATURE_EDITING_VI
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200156# define DELBUFSIZ 128
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200157 CHAR_T *delptr;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000158 smallint newdelflag; /* whether delbuf should be reused yet */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200159 CHAR_T delbuf[DELBUFSIZ]; /* a place to store deleted characters */
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000160#endif
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +0100161#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
Denys Vlasenkod83bbf42009-10-27 10:47:49 +0100162 smallint sent_ESC_br6n;
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +0100163#endif
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000164};
165
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000166/* See lineedit_ptr_hack.c */
167extern struct lineedit_statics *const lineedit_ptr_to_statics;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000168
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000169#define S (*lineedit_ptr_to_statics)
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000170#define state (S.state )
171#define cmdedit_termw (S.cmdedit_termw )
172#define previous_SIGWINCH_handler (S.previous_SIGWINCH_handler)
173#define cmdedit_x (S.cmdedit_x )
174#define cmdedit_y (S.cmdedit_y )
175#define cmdedit_prmt_len (S.cmdedit_prmt_len)
176#define cursor (S.cursor )
177#define command_len (S.command_len )
178#define command_ps (S.command_ps )
179#define cmdedit_prompt (S.cmdedit_prompt )
Denis Vlasenkof7be20e2007-12-24 14:09:19 +0000180#define user_buf (S.user_buf )
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000181#define home_pwd_buf (S.home_pwd_buf )
182#define matches (S.matches )
183#define num_matches (S.num_matches )
184#define delptr (S.delptr )
185#define newdelflag (S.newdelflag )
186#define delbuf (S.delbuf )
187
188#define INIT_S() do { \
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000189 (*(struct lineedit_statics**)&lineedit_ptr_to_statics) = xzalloc(sizeof(S)); \
Denis Vlasenko574f2f42008-02-27 18:41:59 +0000190 barrier(); \
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000191 cmdedit_termw = 80; \
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200192 IF_USERNAME_OR_HOMEDIR(home_pwd_buf = (char*)null_str;) \
Shawn J. Goff46031da2013-02-27 18:30:05 +0100193 IF_FEATURE_EDITING_VI(delptr = delbuf;) \
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000194} while (0)
Alexey Fomenko232ebaa2011-05-20 04:26:29 +0200195
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000196static void deinit_S(void)
197{
198#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000199 /* This one is allocated only if FANCY_PROMPT is on
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200200 * (otherwise it points to verbatim prompt (NOT malloced)) */
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000201 free((char*)cmdedit_prompt);
202#endif
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +0200203#if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000204 free(user_buf);
205 if (home_pwd_buf != null_str)
206 free(home_pwd_buf);
207#endif
Denis Vlasenko5d89fba2008-04-22 00:08:27 +0000208 free(lineedit_ptr_to_statics);
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000209}
210#define DEINIT_S() deinit_S()
211
Denis Vlasenko2c844952008-04-25 18:44:35 +0000212
Denys Vlasenko19158a82010-03-26 14:06:56 +0100213#if ENABLE_UNICODE_SUPPORT
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200214static size_t load_string(const char *src)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200215{
Denys Vlasenko353680a2011-03-27 01:18:07 +0100216 if (unicode_status == UNICODE_ON) {
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200217 ssize_t len = mbstowcs(command_ps, src, S.maxsize - 1);
Denys Vlasenko353680a2011-03-27 01:18:07 +0100218 if (len < 0)
219 len = 0;
220 command_ps[len] = BB_NUL;
221 return len;
222 } else {
223 unsigned i = 0;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200224 while (src[i] && i < S.maxsize - 1) {
225 command_ps[i] = src[i];
Denys Vlasenko353680a2011-03-27 01:18:07 +0100226 i++;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200227 }
228 command_ps[i] = BB_NUL;
Denys Vlasenko353680a2011-03-27 01:18:07 +0100229 return i;
230 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200231}
Tomas Heinricha659b812010-04-29 13:43:39 +0200232static unsigned save_string(char *dst, unsigned maxsize)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200233{
Denys Vlasenko353680a2011-03-27 01:18:07 +0100234 if (unicode_status == UNICODE_ON) {
Denys Vlasenko94043e82010-05-11 14:49:13 +0200235# if !ENABLE_UNICODE_PRESERVE_BROKEN
Denys Vlasenko353680a2011-03-27 01:18:07 +0100236 ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
237 if (len < 0)
238 len = 0;
239 dst[len] = '\0';
240 return len;
Denys Vlasenko94043e82010-05-11 14:49:13 +0200241# else
Denys Vlasenko353680a2011-03-27 01:18:07 +0100242 unsigned dstpos = 0;
243 unsigned srcpos = 0;
Tomas Heinricha659b812010-04-29 13:43:39 +0200244
Denys Vlasenko353680a2011-03-27 01:18:07 +0100245 maxsize--;
246 while (dstpos < maxsize) {
247 wchar_t wc;
248 int n = srcpos;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200249
Denys Vlasenko353680a2011-03-27 01:18:07 +0100250 /* Convert up to 1st invalid byte (or up to end) */
251 while ((wc = command_ps[srcpos]) != BB_NUL
252 && !unicode_is_raw_byte(wc)
253 ) {
254 srcpos++;
255 }
256 command_ps[srcpos] = BB_NUL;
257 n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos);
258 if (n < 0) /* should not happen */
259 break;
260 dstpos += n;
261 if (wc == BB_NUL) /* usually is */
262 break;
263
264 /* We do have invalid byte here! */
265 command_ps[srcpos] = wc; /* restore it */
Tomas Heinricha659b812010-04-29 13:43:39 +0200266 srcpos++;
Denys Vlasenko353680a2011-03-27 01:18:07 +0100267 if (dstpos == maxsize)
268 break;
269 dst[dstpos++] = (char) wc;
Tomas Heinricha659b812010-04-29 13:43:39 +0200270 }
Denys Vlasenko353680a2011-03-27 01:18:07 +0100271 dst[dstpos] = '\0';
272 return dstpos;
Denys Vlasenko94043e82010-05-11 14:49:13 +0200273# endif
Denys Vlasenko353680a2011-03-27 01:18:07 +0100274 } else {
275 unsigned i = 0;
276 while ((dst[i] = command_ps[i]) != 0)
277 i++;
278 return i;
279 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200280}
281/* I thought just fputwc(c, stdout) would work. But no... */
282static void BB_PUTCHAR(wchar_t c)
283{
Denys Vlasenko353680a2011-03-27 01:18:07 +0100284 if (unicode_status == UNICODE_ON) {
285 char buf[MB_CUR_MAX + 1];
286 mbstate_t mbst = { 0 };
287 ssize_t len = wcrtomb(buf, c, &mbst);
288 if (len > 0) {
289 buf[len] = '\0';
290 fputs(buf, stdout);
291 }
292 } else {
293 /* In this case, c is always one byte */
294 putchar(c);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200295 }
296}
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200297# if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
298static wchar_t adjust_width_and_validate_wc(unsigned *width_adj, wchar_t wc)
299# else
300static wchar_t adjust_width_and_validate_wc(wchar_t wc)
301# define adjust_width_and_validate_wc(width_adj, wc) \
302 ((*(width_adj))++, adjust_width_and_validate_wc(wc))
303# endif
304{
305 int w = 1;
306
307 if (unicode_status == UNICODE_ON) {
Denys Vlasenko26e2c1d2010-05-16 21:15:03 +0200308 if (wc > CONFIG_LAST_SUPPORTED_WCHAR) {
309 /* note: also true for unicode_is_raw_byte(wc) */
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200310 goto subst;
311 }
312 w = wcwidth(wc);
313 if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0)
314 || (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0)
315 || (!ENABLE_UNICODE_WIDE_WCHARS && w > 1)
316 ) {
317 subst:
318 w = 1;
319 wc = CONFIG_SUBST_WCHAR;
320 }
321 }
322
323# if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
324 *width_adj += w;
325#endif
326 return wc;
327}
328#else /* !UNICODE */
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200329static size_t load_string(const char *src)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200330{
Denys Vlasenkoa669eca2011-07-11 07:36:59 +0200331 safe_strncpy(command_ps, src, S.maxsize);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200332 return strlen(command_ps);
333}
Denys Vlasenko9038d6f2009-07-15 20:02:19 +0200334# if ENABLE_FEATURE_TAB_COMPLETION
Tomas Heinricha659b812010-04-29 13:43:39 +0200335static void save_string(char *dst, unsigned maxsize)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200336{
337 safe_strncpy(dst, command_ps, maxsize);
338}
Denys Vlasenko7dd0ce42009-07-15 18:27:47 +0200339# endif
340# define BB_PUTCHAR(c) bb_putchar(c)
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200341/* Should never be called: */
342int adjust_width_and_validate_wc(unsigned *width_adj, int wc);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200343#endif
344
345
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000346/* Put 'command_ps[cursor]', cursor++.
347 * Advance cursor on screen. If we reached right margin, scroll text up
348 * and remove terminal margin effect by printing 'next_char' */
Denis Vlasenko2c844952008-04-25 18:44:35 +0000349#define HACK_FOR_WRONG_WIDTH 1
Denys Vlasenko94043e82010-05-11 14:49:13 +0200350static void put_cur_glyph_and_inc_cursor(void)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000351{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200352 CHAR_T c = command_ps[cursor];
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200353 unsigned width = 0;
354 int ofs_to_right;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000355
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200356 if (c == BB_NUL) {
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000357 /* erase character after end of input string */
358 c = ' ';
Denys Vlasenko94043e82010-05-11 14:49:13 +0200359 } else {
360 /* advance cursor only if we aren't at the end yet */
361 cursor++;
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200362 if (unicode_status == UNICODE_ON) {
363 IF_UNICODE_WIDE_WCHARS(width = cmdedit_x;)
364 c = adjust_width_and_validate_wc(&cmdedit_x, c);
365 IF_UNICODE_WIDE_WCHARS(width = cmdedit_x - width;)
366 } else {
367 cmdedit_x++;
368 }
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000369 }
Denys Vlasenko94043e82010-05-11 14:49:13 +0200370
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200371 ofs_to_right = cmdedit_x - cmdedit_termw;
372 if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right <= 0) {
373 /* c fits on this line */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200374 BB_PUTCHAR(c);
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000375 }
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200376
377 if (ofs_to_right >= 0) {
378 /* we go to the next line */
Denis Vlasenko2c844952008-04-25 18:44:35 +0000379#if HACK_FOR_WRONG_WIDTH
380 /* This works better if our idea of term width is wrong
381 * and it is actually wider (often happens on serial lines).
382 * Printing CR,LF *forces* cursor to next line.
383 * OTOH if terminal width is correct AND terminal does NOT
384 * have automargin (IOW: it is moving cursor to next line
385 * by itself (which is wrong for VT-10x terminals)),
386 * this will break things: there will be one extra empty line */
387 puts("\r"); /* + implicit '\n' */
388#else
Denys Vlasenko94043e82010-05-11 14:49:13 +0200389 /* VT-10x terminals don't wrap cursor to next line when last char
390 * on the line is printed - cursor stays "over" this char.
391 * Need to print _next_ char too (first one to appear on next line)
392 * to make cursor move down to next line.
393 */
394 /* Works ok only if cmdedit_termw is correct. */
395 c = command_ps[cursor];
396 if (c == BB_NUL)
397 c = ' ';
398 BB_PUTCHAR(c);
Denis Vlasenko4daad902007-09-27 10:20:47 +0000399 bb_putchar('\b');
Denis Vlasenko2c844952008-04-25 18:44:35 +0000400#endif
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200401 cmdedit_y++;
402 if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right == 0) {
403 width = 0;
404 } else { /* ofs_to_right > 0 */
405 /* wide char c didn't fit on prev line */
406 BB_PUTCHAR(c);
407 }
408 cmdedit_x = width;
Mark Whitley4e338752001-01-26 20:42:23 +0000409 }
Erik Andersen13456d12000-03-16 08:09:57 +0000410}
411
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000412/* Move to end of line (by printing all chars till the end) */
Denys Vlasenko94043e82010-05-11 14:49:13 +0200413static void put_till_end_and_adv_cursor(void)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000414{
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000415 while (cursor < command_len)
Denys Vlasenko94043e82010-05-11 14:49:13 +0200416 put_cur_glyph_and_inc_cursor();
Mark Whitley4e338752001-01-26 20:42:23 +0000417}
418
419/* Go to the next line */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000420static void goto_new_line(void)
421{
Denys Vlasenko94043e82010-05-11 14:49:13 +0200422 put_till_end_and_adv_cursor();
Denys Vlasenko9963fe32010-05-17 04:05:53 +0200423 if (cmdedit_x != 0)
Denis Vlasenko4daad902007-09-27 10:20:47 +0000424 bb_putchar('\n');
Mark Whitley4e338752001-01-26 20:42:23 +0000425}
426
Rob Landley88621d72006-08-29 19:41:06 +0000427static void beep(void)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000428{
Denis Vlasenko4daad902007-09-27 10:20:47 +0000429 bb_putchar('\007');
Erik Andersen13456d12000-03-16 08:09:57 +0000430}
431
Denys Vlasenko248c3242010-05-17 00:45:44 +0200432static void put_prompt(void)
433{
434 unsigned w;
435
Denys Vlasenko9963fe32010-05-17 04:05:53 +0200436 fputs(cmdedit_prompt, stdout);
Denys Vlasenko248c3242010-05-17 00:45:44 +0200437 fflush_all();
438 cursor = 0;
439 w = cmdedit_termw; /* read volatile var once */
440 cmdedit_y = cmdedit_prmt_len / w; /* new quasireal y */
441 cmdedit_x = cmdedit_prmt_len % w;
442}
443
Eric Andersenaff114c2004-04-14 17:51:38 +0000444/* Move back one character */
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000445/* (optimized for slow terminals) */
446static void input_backward(unsigned num)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000447{
448 if (num > cursor)
449 num = cursor;
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200450 if (num == 0)
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000451 return;
452 cursor -= num;
Erik Andersen13456d12000-03-16 08:09:57 +0000453
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200454 if ((ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS)
455 && unicode_status == UNICODE_ON
456 ) {
457 /* correct NUM to be equal to _screen_ width */
458 int n = num;
459 num = 0;
460 while (--n >= 0)
461 adjust_width_and_validate_wc(&num, command_ps[cursor + n]);
462 if (num == 0)
463 return;
464 }
465
Denis Vlasenkob267ed92008-05-25 21:52:03 +0000466 if (cmdedit_x >= num) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000467 cmdedit_x -= num;
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000468 if (num <= 4) {
Denis Vlasenko6f043912008-02-18 22:28:03 +0000469 /* This is longer by 5 bytes on x86.
Denis Vlasenkob267ed92008-05-25 21:52:03 +0000470 * Also gets miscompiled for ARM users
471 * (busybox.net/bugs/view.php?id=2274).
Denis Vlasenko6f043912008-02-18 22:28:03 +0000472 * printf(("\b\b\b\b" + 4) - num);
473 * return;
474 */
475 do {
476 bb_putchar('\b');
477 } while (--num);
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000478 return;
479 }
Marek Polacek7b181072010-10-28 21:34:56 +0200480 printf(ESC"[%uD", num);
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000481 return;
Erik Andersen13456d12000-03-16 08:09:57 +0000482 }
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +0000483
484 /* Need to go one or more lines up */
Denys Vlasenko248c3242010-05-17 00:45:44 +0200485 if (ENABLE_UNICODE_WIDE_WCHARS) {
486 /* With wide chars, it is hard to "backtrack"
487 * and reliably figure out where to put cursor.
488 * Example (<> is a wide char; # is an ordinary char, _ cursor):
489 * |prompt: <><> |
490 * |<><><><><><> |
491 * |_ |
492 * and user presses left arrow. num = 1, cmdedit_x = 0,
493 * We need to go up one line, and then - how do we know that
494 * we need to go *10* positions to the right? Because
495 * |prompt: <>#<>|
496 * |<><><>#<><><>|
497 * |_ |
498 * in this situation we need to go *11* positions to the right.
499 *
500 * A simpler thing to do is to redraw everything from the start
501 * up to new cursor position (which is already known):
502 */
503 unsigned sv_cursor;
Denys Vlasenko9963fe32010-05-17 04:05:53 +0200504 /* go to 1st column; go up to first line */
Marek Polacek7b181072010-10-28 21:34:56 +0200505 printf("\r" ESC"[%uA", cmdedit_y);
Denys Vlasenko248c3242010-05-17 00:45:44 +0200506 cmdedit_y = 0;
507 sv_cursor = cursor;
508 put_prompt(); /* sets cursor to 0 */
509 while (cursor < sv_cursor)
510 put_cur_glyph_and_inc_cursor();
511 } else {
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200512 int lines_up;
513 unsigned width;
514 /* num = chars to go back from the beginning of current line: */
Denys Vlasenko248c3242010-05-17 00:45:44 +0200515 num -= cmdedit_x;
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200516 width = cmdedit_termw; /* read volatile var once */
517 /* num=1...w: one line up, w+1...2w: two, etc: */
518 lines_up = 1 + (num - 1) / width;
519 cmdedit_x = (width * cmdedit_y - num) % width;
520 cmdedit_y -= lines_up;
521 /* go to 1st column; go up */
Marek Polacek7b181072010-10-28 21:34:56 +0200522 printf("\r" ESC"[%uA", lines_up);
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200523 /* go to correct column.
Denys Vlasenkobbf1aa12010-05-17 12:33:13 +0200524 * xterm, konsole, Linux VT interpret 0 as 1 below! wow.
525 * need to *make sure* we skip it if cmdedit_x == 0 */
Denys Vlasenko1118d9b2010-05-17 12:30:44 +0200526 if (cmdedit_x)
Marek Polacek7b181072010-10-28 21:34:56 +0200527 printf(ESC"[%uC", cmdedit_x);
Denis Vlasenkob267ed92008-05-25 21:52:03 +0000528 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000529}
530
Eric Andersenaff114c2004-04-14 17:51:38 +0000531/* draw prompt, editor line, and clear tail */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000532static void redraw(int y, int back_cursor)
533{
Denys Vlasenko9963fe32010-05-17 04:05:53 +0200534 if (y > 0) /* up y lines */
Marek Polacek7b181072010-10-28 21:34:56 +0200535 printf(ESC"[%uA", y);
Denis Vlasenko4daad902007-09-27 10:20:47 +0000536 bb_putchar('\r');
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000537 put_prompt();
Denys Vlasenko94043e82010-05-11 14:49:13 +0200538 put_till_end_and_adv_cursor();
539 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000540 input_backward(back_cursor);
541}
542
Paul Fox3f11b1b2005-08-04 19:04:46 +0000543/* Delete the char in front of the cursor, optionally saving it
544 * for later putback */
Denis Vlasenko85c24712008-03-17 09:04:04 +0000545#if !ENABLE_FEATURE_EDITING_VI
546static void input_delete(void)
547#define input_delete(save) input_delete()
548#else
Paul Fox3f11b1b2005-08-04 19:04:46 +0000549static void input_delete(int save)
Denis Vlasenko85c24712008-03-17 09:04:04 +0000550#endif
Erik Andersenf0657d32000-04-12 17:49:52 +0000551{
Mark Whitley4e338752001-01-26 20:42:23 +0000552 int j = cursor;
Erik Andersena2685732000-04-09 18:27:46 +0000553
Denis Vlasenko77ad97f2008-05-13 02:27:31 +0000554 if (j == (int)command_len)
Erik Andersenf0657d32000-04-12 17:49:52 +0000555 return;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000556
Denis Vlasenko38f63192007-01-22 09:03:07 +0000557#if ENABLE_FEATURE_EDITING_VI
Paul Fox3f11b1b2005-08-04 19:04:46 +0000558 if (save) {
559 if (newdelflag) {
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000560 delptr = delbuf;
Paul Fox3f11b1b2005-08-04 19:04:46 +0000561 newdelflag = 0;
562 }
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000563 if ((delptr - delbuf) < DELBUFSIZ)
564 *delptr++ = command_ps[j];
Paul Fox3f11b1b2005-08-04 19:04:46 +0000565 }
566#endif
567
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200568 memmove(command_ps + j, command_ps + j + 1,
Denys Vlasenko9531f7d2009-07-16 14:33:16 +0200569 /* (command_len + 1 [because of NUL]) - (j + 1)
570 * simplified into (command_len - j) */
571 (command_len - j) * sizeof(command_ps[0]));
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000572 command_len--;
Denys Vlasenko94043e82010-05-11 14:49:13 +0200573 put_till_end_and_adv_cursor();
574 /* Last char is still visible, erase it (and more) */
575 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
Eric Andersenc470f442003-07-28 09:56:35 +0000576 input_backward(cursor - j); /* back to old pos cursor */
Erik Andersenf0657d32000-04-12 17:49:52 +0000577}
578
Denis Vlasenko38f63192007-01-22 09:03:07 +0000579#if ENABLE_FEATURE_EDITING_VI
Paul Fox3f11b1b2005-08-04 19:04:46 +0000580static void put(void)
581{
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000582 int ocursor;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +0000583 int j = delptr - delbuf;
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000584
Paul Fox3f11b1b2005-08-04 19:04:46 +0000585 if (j == 0)
586 return;
587 ocursor = cursor;
588 /* open hole and then fill it */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +0200589 memmove(command_ps + cursor + j, command_ps + cursor,
590 (command_len - cursor + 1) * sizeof(command_ps[0]));
591 memcpy(command_ps + cursor, delbuf, j * sizeof(command_ps[0]));
Denis Vlasenko253ce002007-01-22 08:34:44 +0000592 command_len += j;
Denys Vlasenko94043e82010-05-11 14:49:13 +0200593 put_till_end_and_adv_cursor();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000594 input_backward(cursor - ocursor - j + 1); /* at end of new text */
Paul Fox3f11b1b2005-08-04 19:04:46 +0000595}
596#endif
597
Mark Whitley4e338752001-01-26 20:42:23 +0000598/* Delete the char in back of the cursor */
599static void input_backspace(void)
600{
601 if (cursor > 0) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000602 input_backward(1);
Paul Fox3f11b1b2005-08-04 19:04:46 +0000603 input_delete(0);
Mark Whitley4e338752001-01-26 20:42:23 +0000604 }
605}
606
Eric Andersenaff114c2004-04-14 17:51:38 +0000607/* Move forward one character */
Mark Whitley4e338752001-01-26 20:42:23 +0000608static void input_forward(void)
Erik Andersenf0657d32000-04-12 17:49:52 +0000609{
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000610 if (cursor < command_len)
Denys Vlasenko94043e82010-05-11 14:49:13 +0200611 put_cur_glyph_and_inc_cursor();
Erik Andersenf0657d32000-04-12 17:49:52 +0000612}
613
Denis Vlasenko38f63192007-01-22 09:03:07 +0000614#if ENABLE_FEATURE_TAB_COMPLETION
Mark Whitley4e338752001-01-26 20:42:23 +0000615
Mike Shalf3763032010-11-22 03:49:18 +0100616//FIXME:
617//needs to be more clever: currently it thinks that "foo\ b<TAB>
618//matches the file named "foo bar", which is untrue.
619//Also, perhaps "foo b<TAB> needs to complete to "foo bar" <cursor>,
620//not "foo bar <cursor>...
621
Denis Vlasenko5592fac2007-01-21 19:19:46 +0000622static void free_tab_completion_data(void)
623{
624 if (matches) {
625 while (num_matches)
626 free(matches[--num_matches]);
627 free(matches);
628 matches = NULL;
629 }
630}
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +0000631
Denis Vlasenkod56b47f2006-12-21 22:24:46 +0000632static void add_match(char *matched)
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +0000633{
Denis Vlasenkodeeed592008-07-08 05:14:36 +0000634 matches = xrealloc_vector(matches, 4, num_matches);
635 matches[num_matches] = matched;
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +0000636 num_matches++;
637}
638
Mike Shalf3763032010-11-22 03:49:18 +0100639# if ENABLE_FEATURE_USERNAME_COMPLETION
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200640/* Replace "~user/..." with "/homedir/...".
641 * The parameter is malloced, free it or return it
642 * unchanged if no user is matched.
643 */
644static char *username_path_completion(char *ud)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000645{
646 struct passwd *entry;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200647 char *tilde_name = ud;
648 char *home = NULL;
649
650 ud++; /* skip ~ */
651 if (*ud == '/') { /* "~/..." */
652 home = home_pwd_buf;
653 } else {
654 /* "~user/..." */
655 ud = strchr(ud, '/');
656 *ud = '\0'; /* "~user" */
657 entry = getpwnam(tilde_name + 1);
658 *ud = '/'; /* restore "~user/..." */
659 if (entry)
660 home = entry->pw_dir;
661 }
662 if (home) {
663 ud = concat_path_file(home, ud);
664 free(tilde_name);
665 tilde_name = ud;
666 }
667 return tilde_name;
668}
669
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200670/* ~use<tab> - find all users with this prefix.
671 * Return the length of the prefix used for matching.
672 */
673static NOINLINE unsigned complete_username(const char *ud)
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200674{
675 /* Using _r function to avoid pulling in static buffers */
676 char line_buff[256];
677 struct passwd pwd;
678 struct passwd *result;
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200679 unsigned userlen;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000680
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200681 ud++; /* skip ~ */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000682 userlen = strlen(ud);
683
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200684 setpwent();
685 while (!getpwent_r(&pwd, line_buff, sizeof(line_buff), &result)) {
686 /* Null usernames should result in all users as possible completions. */
687 if (/*!userlen || */ strncmp(ud, pwd.pw_name, userlen) == 0) {
688 add_match(xasprintf("~%s/", pwd.pw_name));
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000689 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000690 }
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200691 endpwent();
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200692
693 return 1 + userlen;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000694}
Mike Shalf3763032010-11-22 03:49:18 +0100695# endif /* FEATURE_USERNAME_COMPLETION */
Mark Whitley4e338752001-01-26 20:42:23 +0000696
697enum {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000698 FIND_EXE_ONLY = 0,
699 FIND_DIR_ONLY = 1,
Mark Whitley4e338752001-01-26 20:42:23 +0000700 FIND_FILE_ONLY = 2,
701};
Erik Andersen1dbe3402000-03-19 10:46:06 +0000702
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200703static int path_parse(char ***p)
Mark Whitley4e338752001-01-26 20:42:23 +0000704{
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000705 int npth;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000706 const char *pth;
Denis Vlasenko253ce002007-01-22 08:34:44 +0000707 char *tmp;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000708 char **res;
Mark Whitley4e338752001-01-26 20:42:23 +0000709
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000710 if (state->flags & WITH_PATH_LOOKUP)
711 pth = state->path_lookup;
712 else
713 pth = getenv("PATH");
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200714
715 /* PATH="" or PATH=":"? */
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000716 if (!pth || !pth[0] || LONE_CHAR(pth, ':'))
717 return 1;
Mark Whitley4e338752001-01-26 20:42:23 +0000718
Denis Vlasenko253ce002007-01-22 08:34:44 +0000719 tmp = (char*)pth;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000720 npth = 1; /* path component count */
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000721 while (1) {
Mark Whitley4e338752001-01-26 20:42:23 +0000722 tmp = strchr(tmp, ':');
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000723 if (!tmp)
Mark Whitley4e338752001-01-26 20:42:23 +0000724 break;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200725 tmp++;
726 if (*tmp == '\0')
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000727 break; /* :<empty> */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000728 npth++;
Mark Whitley4e338752001-01-26 20:42:23 +0000729 }
730
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200731 *p = res = xmalloc(npth * sizeof(res[0]));
Denis Vlasenko253ce002007-01-22 08:34:44 +0000732 res[0] = tmp = xstrdup(pth);
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000733 npth = 1;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000734 while (1) {
Mark Whitley4e338752001-01-26 20:42:23 +0000735 tmp = strchr(tmp, ':');
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000736 if (!tmp)
Mark Whitley4e338752001-01-26 20:42:23 +0000737 break;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +0000738 *tmp++ = '\0'; /* ':' -> '\0' */
739 if (*tmp == '\0')
740 break; /* :<empty> */
741 res[npth++] = tmp;
Mark Whitley4e338752001-01-26 20:42:23 +0000742 }
Mark Whitley4e338752001-01-26 20:42:23 +0000743 return npth;
744}
745
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200746/* Complete command, directory or file name.
747 * Return the length of the prefix used for matching.
748 */
749static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000750{
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000751 char *path1[1];
752 char **paths = path1;
753 int npaths;
754 int i;
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200755 unsigned pf_len;
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200756 const char *pfind;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200757 char *dirbuf = NULL;
Mark Whitley4e338752001-01-26 20:42:23 +0000758
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000759 npaths = 1;
Denis Vlasenkoab2aea42007-01-29 22:51:58 +0000760 path1[0] = (char*)".";
Mark Whitley4e338752001-01-26 20:42:23 +0000761
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200762 pfind = strrchr(command, '/');
763 if (!pfind) {
764 if (type == FIND_EXE_ONLY)
765 npaths = path_parse(&paths);
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000766 pfind = command;
Mark Whitley4e338752001-01-26 20:42:23 +0000767 } else {
Denis Vlasenko82b39e82007-01-21 19:18:19 +0000768 /* point to 'l' in "..../last_component" */
769 pfind++;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200770 /* dirbuf = ".../.../.../" */
771 dirbuf = xstrndup(command, pfind - command);
Mike Shalf3763032010-11-22 03:49:18 +0100772# if ENABLE_FEATURE_USERNAME_COMPLETION
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200773 if (dirbuf[0] == '~') /* ~/... or ~user/... */
774 dirbuf = username_path_completion(dirbuf);
Mike Shalf3763032010-11-22 03:49:18 +0100775# endif
Denys Vlasenko7063e862010-09-02 12:44:39 +0200776 path1[0] = dirbuf;
Mark Whitley4e338752001-01-26 20:42:23 +0000777 }
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200778 pf_len = strlen(pfind);
Erik Andersenc7c634b2000-03-19 05:28:55 +0000779
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000780 for (i = 0; i < npaths; i++) {
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200781 DIR *dir;
782 struct dirent *next;
783 struct stat st;
784 char *found;
785
Mark Whitley4e338752001-01-26 20:42:23 +0000786 dir = opendir(paths[i]);
Denis Vlasenkob5202712008-04-24 04:42:52 +0000787 if (!dir)
788 continue; /* don't print an error */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000789
790 while ((next = readdir(dir)) != NULL) {
Denys Vlasenko39263632010-09-03 14:11:08 +0200791 unsigned len;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200792 const char *name_found = next->d_name;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000793
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200794 /* .../<tab>: bash 3.2.0 shows dotfiles, but not . and .. */
795 if (!pfind[0] && DOT_OR_DOTDOT(name_found))
Mark Whitley4e338752001-01-26 20:42:23 +0000796 continue;
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200797 /* match? */
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200798 if (strncmp(name_found, pfind, pf_len) != 0)
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200799 continue; /* no */
800
801 found = concat_path_file(paths[i], name_found);
Denis Vlasenkob5202712008-04-24 04:42:52 +0000802 /* NB: stat() first so that we see is it a directory;
803 * but if that fails, use lstat() so that
804 * we still match dangling links */
805 if (stat(found, &st) && lstat(found, &st))
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200806 goto cont; /* hmm, remove in progress? */
Denis Vlasenkod56b47f2006-12-21 22:24:46 +0000807
Denys Vlasenko39263632010-09-03 14:11:08 +0200808 /* Save only name */
809 len = strlen(name_found);
810 found = xrealloc(found, len + 2); /* +2: for slash and NUL */
811 strcpy(found, name_found);
Denis Vlasenkod56b47f2006-12-21 22:24:46 +0000812
Mark Whitley4e338752001-01-26 20:42:23 +0000813 if (S_ISDIR(st.st_mode)) {
Denys Vlasenko39263632010-09-03 14:11:08 +0200814 /* name is a directory, add slash */
815 found[len] = '/';
816 found[len + 1] = '\0';
Mark Whitley4e338752001-01-26 20:42:23 +0000817 } else {
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200818 /* skip files if looking for dirs only (example: cd) */
Eric Andersenc470f442003-07-28 09:56:35 +0000819 if (type == FIND_DIR_ONLY)
Eric Andersene5dfced2001-04-09 22:48:12 +0000820 goto cont;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000821 }
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200822 /* add it to the list */
Denis Vlasenkod56b47f2006-12-21 22:24:46 +0000823 add_match(found);
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +0000824 continue;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000825 cont:
Eric Andersene5dfced2001-04-09 22:48:12 +0000826 free(found);
Erik Andersen1dbe3402000-03-19 10:46:06 +0000827 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000828 closedir(dir);
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200829 } /* for every path */
830
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000831 if (paths != path1) {
Denis Vlasenkob5202712008-04-24 04:42:52 +0000832 free(paths[0]); /* allocated memory is only in first member */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000833 free(paths);
834 }
Denys Vlasenko39263632010-09-03 14:11:08 +0200835 free(dirbuf);
Denys Vlasenko3c460b02010-09-03 12:56:36 +0200836
837 return pf_len;
Erik Andersen6273f652000-03-17 01:12:41 +0000838}
Erik Andersenf0657d32000-04-12 17:49:52 +0000839
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200840/* build_match_prefix:
Denys Vlasenko76939e72010-09-03 14:09:24 +0200841 * On entry, match_buf contains everything up to cursor at the moment <tab>
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200842 * was pressed. This function looks at it, figures out what part of it
843 * constitutes the command/file/directory prefix to use for completion,
Denys Vlasenko76939e72010-09-03 14:09:24 +0200844 * and rewrites match_buf to contain only that part.
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200845 */
Denys Vlasenko76939e72010-09-03 14:09:24 +0200846#define dbg_bmp 0
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200847/* Helpers: */
848/* QUOT is used on elements of int_buf[], which are bytes,
849 * not Unicode chars. Therefore it works correctly even in Unicode mode.
850 */
851#define QUOT (UCHAR_MAX+1)
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200852static void remove_chunk(int16_t *int_buf, int beg, int end)
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200853{
854 /* beg must be <= end */
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200855 if (beg == end)
856 return;
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200857
858 while ((int_buf[beg] = int_buf[end]) != 0)
859 beg++, end++;
860
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200861 if (dbg_bmp) {
862 int i;
863 for (i = 0; int_buf[i]; i++)
864 bb_putchar((unsigned char)int_buf[i]);
865 bb_putchar('\n');
866 }
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200867}
Denys Vlasenko76939e72010-09-03 14:09:24 +0200868/* Caller ensures that match_buf points to a malloced buffer
869 * big enough to hold strlen(match_buf)*2 + 2
870 */
871static NOINLINE int build_match_prefix(char *match_buf)
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000872{
873 int i, j;
874 int command_mode;
Denys Vlasenko76939e72010-09-03 14:09:24 +0200875 int16_t *int_buf = (int16_t*)match_buf;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000876
Denys Vlasenko76939e72010-09-03 14:09:24 +0200877 if (dbg_bmp) printf("\n%s\n", match_buf);
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200878
Denys Vlasenko76939e72010-09-03 14:09:24 +0200879 /* Copy in reverse order, since they overlap */
880 i = strlen(match_buf);
881 do {
882 int_buf[i] = (unsigned char)match_buf[i];
883 i--;
884 } while (i >= 0);
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000885
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200886 /* Mark every \c as "quoted c" */
Denys Vlasenko76939e72010-09-03 14:09:24 +0200887 for (i = 0; int_buf[i]; i++) {
888 if (int_buf[i] == '\\') {
889 remove_chunk(int_buf, i, i + 1);
890 int_buf[i] |= QUOT;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000891 }
Tomas Heinrichb8909c52010-05-16 20:46:53 +0200892 }
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200893 /* Quote-mark "chars" and 'chars', drop delimiters */
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200894 {
895 int in_quote = 0;
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200896 i = 0;
897 while (int_buf[i]) {
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200898 int cur = int_buf[i];
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200899 if (!cur)
900 break;
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200901 if (cur == '\'' || cur == '"') {
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200902 if (!in_quote || (cur == in_quote)) {
903 in_quote ^= cur;
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200904 remove_chunk(int_buf, i, i + 1);
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200905 continue;
906 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000907 }
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200908 if (in_quote)
909 int_buf[i] = cur | QUOT;
910 i++;
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200911 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000912 }
913
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200914 /* Remove everything up to command delimiters:
915 * ';' ';;' '&' '|' '&&' '||',
916 * but careful with '>&' '<&' '>|'
917 */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000918 for (i = 0; int_buf[i]; i++) {
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200919 int cur = int_buf[i];
920 if (cur == ';' || cur == '&' || cur == '|') {
921 int prev = i ? int_buf[i - 1] : 0;
922 if (cur == '&' && (prev == '>' || prev == '<')) {
923 continue;
924 } else if (cur == '|' && prev == '>') {
925 continue;
926 }
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200927 remove_chunk(int_buf, 0, i + 1 + (cur == int_buf[i + 1]));
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200928 i = -1; /* back to square 1 */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000929 }
930 }
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200931 /* Remove all `cmd` */
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +0200932 for (i = 0; int_buf[i]; i++) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000933 if (int_buf[i] == '`') {
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200934 for (j = i + 1; int_buf[j]; j++) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000935 if (int_buf[j] == '`') {
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200936 /* `cmd` should count as a word:
937 * `cmd` c<tab> should search for files c*,
938 * not commands c*. Therefore we don't drop
939 * `cmd` entirely, we replace it with single `.
940 */
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200941 remove_chunk(int_buf, i, j);
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200942 goto next;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000943 }
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200944 }
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200945 /* No closing ` - command mode, remove all up to ` */
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200946 remove_chunk(int_buf, 0, i + 1);
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200947 break;
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200948 next: ;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000949 }
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +0200950 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000951
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200952 /* Remove "cmd (" and "cmd {"
953 * Example: "if { c<tab>"
954 * In this example, c should be matched as command pfx.
955 */
956 for (i = 0; int_buf[i]; i++) {
957 if (int_buf[i] == '(' || int_buf[i] == '{') {
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200958 remove_chunk(int_buf, 0, i + 1);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +0200959 i = -1; /* back to square 1 */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000960 }
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +0200961 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000962
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200963 /* Remove leading unquoted spaces */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000964 for (i = 0; int_buf[i]; i++)
965 if (int_buf[i] != ' ')
966 break;
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200967 remove_chunk(int_buf, 0, i);
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000968
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200969 /* Determine completion mode */
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000970 command_mode = FIND_EXE_ONLY;
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +0200971 for (i = 0; int_buf[i]; i++) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000972 if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200973 if (int_buf[i] == ' '
974 && command_mode == FIND_EXE_ONLY
Denys Vlasenko81254ed2010-09-03 12:59:15 +0200975 && (char)int_buf[0] == 'c'
976 && (char)int_buf[1] == 'd'
977 && i == 2 /* -> int_buf[2] == ' ' */
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000978 ) {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000979 command_mode = FIND_DIR_ONLY;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +0000980 } else {
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000981 command_mode = FIND_FILE_ONLY;
982 break;
983 }
984 }
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +0200985 }
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200986 if (dbg_bmp) printf("command_mode(0:exe/1:dir/2:file):%d\n", command_mode);
Denys Vlasenko57ea9b42010-09-03 12:51:36 +0200987
988 /* Remove everything except last word */
Denys Vlasenkob068bd72010-09-02 12:01:11 +0200989 for (i = 0; int_buf[i]; i++) /* quasi-strlen(int_buf) */
990 continue;
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000991 for (--i; i >= 0; i--) {
Denys Vlasenko2679e3c2010-09-03 12:53:15 +0200992 int cur = int_buf[i];
993 if (cur == ' ' || cur == '<' || cur == '>' || cur == '|' || cur == '&') {
Denys Vlasenko9b56bf52010-09-03 13:02:47 +0200994 remove_chunk(int_buf, 0, i + 1);
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000995 break;
996 }
997 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +0000998
Denys Vlasenko76939e72010-09-03 14:09:24 +0200999 /* Convert back to string of _chars_ */
Denys Vlasenko81254ed2010-09-03 12:59:15 +02001000 i = 0;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001001 while ((match_buf[i] = int_buf[i]) != '\0')
Denys Vlasenko81254ed2010-09-03 12:59:15 +02001002 i++;
Denys Vlasenko9b56bf52010-09-03 13:02:47 +02001003
Denys Vlasenko76939e72010-09-03 14:09:24 +02001004 if (dbg_bmp) printf("final match_buf:'%s'\n", match_buf);
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001005
1006 return command_mode;
Denys Vlasenko5c2e81b2009-07-16 14:14:34 +02001007}
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001008
Glenn L McGrath4d001292003-01-06 01:11:50 +00001009/*
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001010 * Display by column (original idea from ls applet,
1011 * very optimized by me [Vladimir] :)
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001012 */
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001013static void showfiles(void)
Glenn L McGrath4d001292003-01-06 01:11:50 +00001014{
1015 int ncols, row;
1016 int column_width = 0;
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001017 int nfiles = num_matches;
Glenn L McGrath4d001292003-01-06 01:11:50 +00001018 int nrows = nfiles;
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001019 int l;
Glenn L McGrath4d001292003-01-06 01:11:50 +00001020
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001021 /* find the longest file name - use that as the column width */
Glenn L McGrath4d001292003-01-06 01:11:50 +00001022 for (row = 0; row < nrows; row++) {
Tomas Heinrich11bcf4b2010-06-01 08:33:18 +02001023 l = unicode_strwidth(matches[row]);
Glenn L McGrath4d001292003-01-06 01:11:50 +00001024 if (column_width < l)
1025 column_width = l;
1026 }
1027 column_width += 2; /* min space for columns */
1028 ncols = cmdedit_termw / column_width;
1029
1030 if (ncols > 1) {
1031 nrows /= ncols;
Denis Vlasenko7f1dc212006-12-19 01:10:25 +00001032 if (nfiles % ncols)
Glenn L McGrath4d001292003-01-06 01:11:50 +00001033 nrows++; /* round up fractionals */
Glenn L McGrath4d001292003-01-06 01:11:50 +00001034 } else {
1035 ncols = 1;
1036 }
1037 for (row = 0; row < nrows; row++) {
1038 int n = row;
1039 int nc;
1040
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001041 for (nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++) {
Denis Vlasenkod56b47f2006-12-21 22:24:46 +00001042 printf("%s%-*s", matches[n],
Tomas Heinrich11bcf4b2010-06-01 08:33:18 +02001043 (int)(column_width - unicode_strwidth(matches[n])), ""
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001044 );
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001045 }
Tomas Heinrich11bcf4b2010-06-01 08:33:18 +02001046 if (ENABLE_UNICODE_SUPPORT)
1047 puts(printable_string(NULL, matches[n]));
1048 else
1049 puts(matches[n]);
Glenn L McGrath4d001292003-01-06 01:11:50 +00001050 }
1051}
1052
Mike Shalf3763032010-11-22 03:49:18 +01001053static const char *is_special_char(char c)
1054{
1055 return strchr(" `\"#$%^&*()=+{}[]:;'|\\<>", c);
1056}
1057
1058static char *quote_special_chars(char *found)
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001059{
1060 int l = 0;
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001061 char *s = xzalloc((strlen(found) + 1) * 2);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001062
1063 while (*found) {
Mike Shalf3763032010-11-22 03:49:18 +01001064 if (is_special_char(*found))
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001065 s[l++] = '\\';
1066 s[l++] = *found++;
1067 }
Denys Vlasenko53fd1bf2009-07-16 02:19:39 +02001068 /* s[l] = '\0'; - already is */
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001069 return s;
1070}
1071
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001072/* Do TAB completion */
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001073static NOINLINE void input_tab(smallint *lastWasTab)
Erik Andersenf0657d32000-04-12 17:49:52 +00001074{
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001075 char *chosen_match;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001076 char *match_buf;
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001077 size_t len_found;
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001078 /* Length of string used for matching */
1079 unsigned match_pfx_len = match_pfx_len;
1080 int find_type;
Mike Shalf3763032010-11-22 03:49:18 +01001081# if ENABLE_UNICODE_SUPPORT
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001082 /* cursor pos in command converted to multibyte form */
1083 int cursor_mb;
Mike Shalf3763032010-11-22 03:49:18 +01001084# endif
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001085 if (!(state->flags & TAB_COMPLETION))
1086 return;
1087
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001088 if (*lastWasTab) {
1089 /* The last char was a TAB too.
1090 * Print a list of all the available choices.
1091 */
Denys Vlasenkoa46e16e2010-09-03 13:05:51 +02001092 if (num_matches > 0) {
1093 /* cursor will be changed by goto_new_line() */
Denys Vlasenko044b1802009-07-12 02:50:35 +02001094 int sav_cursor = cursor;
Mark Whitley4e338752001-01-26 20:42:23 +00001095 goto_new_line();
"Vladimir N. Oleynik"fdb871c2006-01-25 11:53:47 +00001096 showfiles();
Denis Vlasenko253ce002007-01-22 08:34:44 +00001097 redraw(0, command_len - sav_cursor);
Erik Andersenf0657d32000-04-12 17:49:52 +00001098 }
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001099 return;
Erik Andersenf0657d32000-04-12 17:49:52 +00001100 }
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001101
1102 *lastWasTab = 1;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001103 chosen_match = NULL;
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001104
Denys Vlasenko76939e72010-09-03 14:09:24 +02001105 /* Make a local copy of the string up to the position of the cursor.
1106 * build_match_prefix will expand it into int16_t's, need to allocate
1107 * twice as much as the string_len+1.
1108 * (we then also (ab)use this extra space later - see (**))
1109 */
1110 match_buf = xmalloc(MAX_LINELEN * sizeof(int16_t));
Mike Shalf3763032010-11-22 03:49:18 +01001111# if !ENABLE_UNICODE_SUPPORT
Denys Vlasenko76939e72010-09-03 14:09:24 +02001112 save_string(match_buf, cursor + 1); /* +1 for NUL */
Mike Shalf3763032010-11-22 03:49:18 +01001113# else
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001114 {
1115 CHAR_T wc = command_ps[cursor];
1116 command_ps[cursor] = BB_NUL;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001117 save_string(match_buf, MAX_LINELEN);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001118 command_ps[cursor] = wc;
Denys Vlasenko76939e72010-09-03 14:09:24 +02001119 cursor_mb = strlen(match_buf);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001120 }
Mike Shalf3763032010-11-22 03:49:18 +01001121# endif
Denys Vlasenko76939e72010-09-03 14:09:24 +02001122 find_type = build_match_prefix(match_buf);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001123
1124 /* Free up any memory already allocated */
1125 free_tab_completion_data();
1126
Mike Shalf3763032010-11-22 03:49:18 +01001127# if ENABLE_FEATURE_USERNAME_COMPLETION
1128 /* If the word starts with ~ and there is no slash in the word,
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001129 * then try completing this word as a username. */
1130 if (state->flags & USERNAME_COMPLETION)
Denys Vlasenko76939e72010-09-03 14:09:24 +02001131 if (match_buf[0] == '~' && strchr(match_buf, '/') == NULL)
1132 match_pfx_len = complete_username(match_buf);
Mike Shalf3763032010-11-22 03:49:18 +01001133# endif
1134 /* If complete_username() did not match,
1135 * try to match a command in $PATH, or a directory, or a file */
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001136 if (!matches)
Denys Vlasenko76939e72010-09-03 14:09:24 +02001137 match_pfx_len = complete_cmd_dir_file(match_buf, find_type);
Mike Shalf3763032010-11-22 03:49:18 +01001138
1139 /* Account for backslashes which will be inserted
1140 * by quote_special_chars() later */
1141 {
1142 const char *e = match_buf + strlen(match_buf);
1143 const char *s = e - match_pfx_len;
1144 while (s < e)
1145 if (is_special_char(*s++))
1146 match_pfx_len++;
1147 }
1148
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001149 /* Remove duplicates */
1150 if (matches) {
Mike Shalf3763032010-11-22 03:49:18 +01001151 unsigned i, n = 0;
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001152 qsort_string_vector(matches, num_matches);
1153 for (i = 0; i < num_matches - 1; ++i) {
1154 //if (matches[i] && matches[i+1]) { /* paranoia */
1155 if (strcmp(matches[i], matches[i+1]) == 0) {
1156 free(matches[i]);
1157 //matches[i] = NULL; /* paranoia */
1158 } else {
1159 matches[n++] = matches[i];
1160 }
1161 //}
1162 }
1163 matches[n++] = matches[i];
1164 num_matches = n;
1165 }
Mike Shalf3763032010-11-22 03:49:18 +01001166
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001167 /* Did we find exactly one match? */
1168 if (num_matches != 1) { /* no */
1169 char *cp;
1170 beep();
1171 if (!matches)
Denys Vlasenko76939e72010-09-03 14:09:24 +02001172 goto ret; /* no matches at all */
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001173 /* Find common prefix */
1174 chosen_match = xstrdup(matches[0]);
1175 for (cp = chosen_match; *cp; cp++) {
1176 unsigned n;
1177 for (n = 1; n < num_matches; n++) {
1178 if (matches[n][cp - chosen_match] != *cp) {
1179 goto stop;
1180 }
1181 }
1182 }
1183 stop:
1184 if (cp == chosen_match) { /* have unique prefix? */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001185 goto ret; /* no */
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001186 }
1187 *cp = '\0';
Mike Shalf3763032010-11-22 03:49:18 +01001188 cp = quote_special_chars(chosen_match);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001189 free(chosen_match);
1190 chosen_match = cp;
1191 len_found = strlen(chosen_match);
1192 } else { /* exactly one match */
1193 /* Next <tab> is not a double-tab */
1194 *lastWasTab = 0;
1195
Mike Shalf3763032010-11-22 03:49:18 +01001196 chosen_match = quote_special_chars(matches[0]);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001197 len_found = strlen(chosen_match);
1198 if (chosen_match[len_found-1] != '/') {
1199 chosen_match[len_found] = ' ';
1200 chosen_match[++len_found] = '\0';
1201 }
1202 }
1203
Mike Shalf3763032010-11-22 03:49:18 +01001204# if !ENABLE_UNICODE_SUPPORT
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001205 /* Have space to place the match? */
1206 /* The result consists of three parts with these lengths: */
1207 /* cursor + (len_found - match_pfx_len) + (command_len - cursor) */
1208 /* it simplifies into: */
1209 if ((int)(len_found - match_pfx_len + command_len) < S.maxsize) {
1210 int pos;
1211 /* save tail */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001212 strcpy(match_buf, &command_ps[cursor]);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001213 /* add match and tail */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001214 sprintf(&command_ps[cursor], "%s%s", chosen_match + match_pfx_len, match_buf);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001215 command_len = strlen(command_ps);
1216 /* new pos */
1217 pos = cursor + len_found - match_pfx_len;
1218 /* write out the matched command */
1219 redraw(cmdedit_y, command_len - pos);
1220 }
Mike Shalf3763032010-11-22 03:49:18 +01001221# else
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001222 {
Denys Vlasenko76939e72010-09-03 14:09:24 +02001223 /* Use 2nd half of match_buf as scratch space - see (**) */
1224 char *command = match_buf + MAX_LINELEN;
1225 int len = save_string(command, MAX_LINELEN);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001226 /* Have space to place the match? */
1227 /* cursor_mb + (len_found - match_pfx_len) + (len - cursor_mb) */
1228 if ((int)(len_found - match_pfx_len + len) < MAX_LINELEN) {
1229 int pos;
1230 /* save tail */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001231 strcpy(match_buf, &command[cursor_mb]);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001232 /* where do we want to have cursor after all? */
1233 strcpy(&command[cursor_mb], chosen_match + match_pfx_len);
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02001234 len = load_string(command);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001235 /* add match and tail */
Denys Vlasenko76939e72010-09-03 14:09:24 +02001236 sprintf(&command[cursor_mb], "%s%s", chosen_match + match_pfx_len, match_buf);
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02001237 command_len = load_string(command);
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001238 /* write out the matched command */
1239 /* paranoia: load_string can return 0 on conv error,
1240 * prevent passing pos = (0 - 12) to redraw */
1241 pos = command_len - len;
1242 redraw(cmdedit_y, pos >= 0 ? pos : 0);
1243 }
1244 }
Mike Shalf3763032010-11-22 03:49:18 +01001245# endif
Denys Vlasenko76939e72010-09-03 14:09:24 +02001246 ret:
Denys Vlasenkoba0e1032010-09-03 14:08:24 +02001247 free(chosen_match);
Denys Vlasenko76939e72010-09-03 14:09:24 +02001248 free(match_buf);
Erik Andersenf0657d32000-04-12 17:49:52 +00001249}
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001250
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02001251#endif /* FEATURE_TAB_COMPLETION */
Erik Andersenf0657d32000-04-12 17:49:52 +00001252
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001253
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001254line_input_t* FAST_FUNC new_line_input_t(int flags)
1255{
1256 line_input_t *n = xzalloc(sizeof(*n));
1257 n->flags = flags;
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001258 n->max_history = MAX_HISTORY;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001259 return n;
1260}
1261
1262
Denis Vlasenko9d4533e2006-11-02 22:09:37 +00001263#if MAX_HISTORY > 0
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001264
Flemming Madsend96ffda2013-04-07 18:47:24 +02001265unsigned FAST_FUNC size_from_HISTFILESIZE(const char *hp)
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001266{
1267 int size = MAX_HISTORY;
1268 if (hp) {
1269 size = atoi(hp);
1270 if (size <= 0)
1271 return 1;
1272 if (size > MAX_HISTORY)
1273 return MAX_HISTORY;
1274 }
1275 return size;
1276}
1277
Denis Vlasenko682ad302008-09-27 01:28:56 +00001278static void save_command_ps_at_cur_history(void)
Erik Andersenf0657d32000-04-12 17:49:52 +00001279{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001280 if (command_ps[0] != BB_NUL) {
Denis Vlasenko682ad302008-09-27 01:28:56 +00001281 int cur = state->cur_history;
1282 free(state->history[cur]);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001283
Denys Vlasenko19158a82010-03-26 14:06:56 +01001284# if ENABLE_UNICODE_SUPPORT
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001285 {
1286 char tbuf[MAX_LINELEN];
1287 save_string(tbuf, sizeof(tbuf));
1288 state->history[cur] = xstrdup(tbuf);
1289 }
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001290# else
Denis Vlasenko682ad302008-09-27 01:28:56 +00001291 state->history[cur] = xstrdup(command_ps);
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001292# endif
Glenn L McGrath062c74f2002-11-27 09:29:49 +00001293 }
Denis Vlasenko682ad302008-09-27 01:28:56 +00001294}
1295
1296/* state->flags is already checked to be nonzero */
1297static int get_previous_history(void)
1298{
1299 if ((state->flags & DO_HISTORY) && state->cur_history) {
1300 save_command_ps_at_cur_history();
1301 state->cur_history--;
1302 return 1;
1303 }
1304 beep();
1305 return 0;
Erik Andersenf0657d32000-04-12 17:49:52 +00001306}
1307
Glenn L McGrath062c74f2002-11-27 09:29:49 +00001308static int get_next_history(void)
Erik Andersenf0657d32000-04-12 17:49:52 +00001309{
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001310 if (state->flags & DO_HISTORY) {
Denis Vlasenko682ad302008-09-27 01:28:56 +00001311 if (state->cur_history < state->cnt_history) {
1312 save_command_ps_at_cur_history(); /* save the current history line */
1313 return ++state->cur_history;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001314 }
Glenn L McGrath062c74f2002-11-27 09:29:49 +00001315 }
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001316 beep();
1317 return 0;
Erik Andersenf0657d32000-04-12 17:49:52 +00001318}
Robert Griebl350d26b2002-12-03 22:45:46 +00001319
Flemming Madsend96ffda2013-04-07 18:47:24 +02001320/* Lists command history. Used by shell 'history' builtins */
1321void FAST_FUNC show_history(const line_input_t *st)
1322{
1323 int i;
1324
1325 if (!st)
1326 return;
1327 for (i = 0; i < st->cnt_history; i++)
1328 printf("%4d %s\n", i, st->history[i]);
1329}
1330
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001331# if ENABLE_FEATURE_EDITING_SAVEHISTORY
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001332/* We try to ensure that concurrent additions to the history
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001333 * do not overwrite each other.
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001334 * Otherwise shell users get unhappy.
1335 *
1336 * History file is trimmed lazily, when it grows several times longer
1337 * than configured MAX_HISTORY lines.
1338 */
1339
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001340static void free_line_input_t(line_input_t *n)
1341{
1342 int i = n->cnt_history;
1343 while (i > 0)
1344 free(n->history[--i]);
1345 free(n);
1346}
1347
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001348/* state->flags is already checked to be nonzero */
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001349static void load_history(line_input_t *st_parm)
Glenn L McGrathfdbbb042002-12-09 11:10:40 +00001350{
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001351 char *temp_h[MAX_HISTORY];
1352 char *line;
Robert Griebl350d26b2002-12-03 22:45:46 +00001353 FILE *fp;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001354 unsigned idx, i, line_len;
Robert Griebl350d26b2002-12-03 22:45:46 +00001355
Denis Vlasenko08ec67b2008-03-26 13:32:30 +00001356 /* NB: do not trash old history if file can't be opened */
Robert Griebl350d26b2002-12-03 22:45:46 +00001357
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001358 fp = fopen_for_read(st_parm->hist_file);
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001359 if (fp) {
Denis Vlasenko08ec67b2008-03-26 13:32:30 +00001360 /* clean up old history */
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001361 for (idx = st_parm->cnt_history; idx > 0;) {
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001362 idx--;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001363 free(st_parm->history[idx]);
1364 st_parm->history[idx] = NULL;
Denis Vlasenko08ec67b2008-03-26 13:32:30 +00001365 }
1366
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001367 /* fill temp_h[], retaining only last MAX_HISTORY lines */
1368 memset(temp_h, 0, sizeof(temp_h));
Denys Vlasenkobede2152011-09-04 16:12:33 +02001369 idx = 0;
Dennis Groenendeee3562012-04-24 22:40:58 +02001370 st_parm->cnt_history_in_file = 0;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001371 while ((line = xmalloc_fgetline(fp)) != NULL) {
1372 if (line[0] == '\0') {
1373 free(line);
Glenn L McGrathfdbbb042002-12-09 11:10:40 +00001374 continue;
1375 }
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001376 free(temp_h[idx]);
1377 temp_h[idx] = line;
Dennis Groenendeee3562012-04-24 22:40:58 +02001378 st_parm->cnt_history_in_file++;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001379 idx++;
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001380 if (idx == st_parm->max_history)
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001381 idx = 0;
Robert Griebl350d26b2002-12-03 22:45:46 +00001382 }
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001383 fclose(fp);
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001384
1385 /* find first non-NULL temp_h[], if any */
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001386 if (st_parm->cnt_history_in_file) {
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001387 while (temp_h[idx] == NULL) {
1388 idx++;
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001389 if (idx == st_parm->max_history)
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001390 idx = 0;
1391 }
1392 }
1393
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001394 /* copy temp_h[] to st_parm->history[] */
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001395 for (i = 0; i < st_parm->max_history;) {
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001396 line = temp_h[idx];
1397 if (!line)
1398 break;
1399 idx++;
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001400 if (idx == st_parm->max_history)
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001401 idx = 0;
1402 line_len = strlen(line);
1403 if (line_len >= MAX_LINELEN)
1404 line[MAX_LINELEN-1] = '\0';
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001405 st_parm->history[i++] = line;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001406 }
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001407 st_parm->cnt_history = i;
Denys Vlasenkobede2152011-09-04 16:12:33 +02001408 if (ENABLE_FEATURE_EDITING_SAVE_ON_EXIT)
1409 st_parm->cnt_history_in_file = i;
Robert Griebl350d26b2002-12-03 22:45:46 +00001410 }
Robert Griebl350d26b2002-12-03 22:45:46 +00001411}
1412
Denys Vlasenkobede2152011-09-04 16:12:33 +02001413# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1414void save_history(line_input_t *st)
1415{
1416 FILE *fp;
1417
Denys Vlasenkobede2152011-09-04 16:12:33 +02001418 if (!st->hist_file)
1419 return;
1420 if (st->cnt_history <= st->cnt_history_in_file)
1421 return;
1422
1423 fp = fopen(st->hist_file, "a");
1424 if (fp) {
1425 int i, fd;
1426 char *new_name;
1427 line_input_t *st_temp;
1428
1429 for (i = st->cnt_history_in_file; i < st->cnt_history; i++)
1430 fprintf(fp, "%s\n", st->history[i]);
1431 fclose(fp);
1432
1433 /* we may have concurrently written entries from others.
1434 * load them */
1435 st_temp = new_line_input_t(st->flags);
1436 st_temp->hist_file = st->hist_file;
1437 st_temp->max_history = st->max_history;
1438 load_history(st_temp);
1439
1440 /* write out temp file and replace hist_file atomically */
1441 new_name = xasprintf("%s.%u.new", st->hist_file, (int) getpid());
1442 fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
1443 if (fd >= 0) {
1444 fp = xfdopen_for_write(fd);
1445 for (i = 0; i < st_temp->cnt_history; i++)
1446 fprintf(fp, "%s\n", st_temp->history[i]);
1447 fclose(fp);
1448 if (rename(new_name, st->hist_file) == 0)
1449 st->cnt_history_in_file = st_temp->cnt_history;
1450 }
1451 free(new_name);
1452 free_line_input_t(st_temp);
1453 }
1454}
1455# else
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001456static void save_history(char *str)
Robert Griebl350d26b2002-12-03 22:45:46 +00001457{
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001458 int fd;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001459 int len, len2;
Eric Andersenc470f442003-07-28 09:56:35 +00001460
Denys Vlasenkobede2152011-09-04 16:12:33 +02001461 if (!state->hist_file)
1462 return;
1463
Wolfram Sang2e9aeae2010-11-15 02:58:28 +01001464 fd = open(state->hist_file, O_WRONLY | O_CREAT | O_APPEND, 0600);
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001465 if (fd < 0)
1466 return;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001467 xlseek(fd, 0, SEEK_END); /* paranoia */
1468 len = strlen(str);
1469 str[len] = '\n'; /* we (try to) do atomic write */
1470 len2 = full_write(fd, str, len + 1);
1471 str[len] = '\0';
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001472 close(fd);
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001473 if (len2 != len + 1)
1474 return; /* "wtf?" */
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001475
1476 /* did we write so much that history file needs trimming? */
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001477 state->cnt_history_in_file++;
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001478 if (state->cnt_history_in_file > state->max_history * 4) {
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001479 char *new_name;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001480 line_input_t *st_temp;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001481
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001482 /* we may have concurrently written entries from others.
1483 * load them */
1484 st_temp = new_line_input_t(state->flags);
1485 st_temp->hist_file = state->hist_file;
Denys Vlasenkoe3d8d072011-03-31 14:39:38 +02001486 st_temp->max_history = state->max_history;
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001487 load_history(st_temp);
1488
1489 /* write out temp file and replace hist_file atomically */
1490 new_name = xasprintf("%s.%u.new", state->hist_file, (int) getpid());
Denys Vlasenko4840ae82011-09-04 15:28:03 +02001491 fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
Wolfram Sang2e9aeae2010-11-15 02:58:28 +01001492 if (fd >= 0) {
1493 FILE *fp;
1494 int i;
1495
1496 fp = xfdopen_for_write(fd);
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001497 for (i = 0; i < st_temp->cnt_history; i++)
1498 fprintf(fp, "%s\n", st_temp->history[i]);
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001499 fclose(fp);
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001500 if (rename(new_name, state->hist_file) == 0)
1501 state->cnt_history_in_file = st_temp->cnt_history;
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001502 }
1503 free(new_name);
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00001504 free_line_input_t(st_temp);
Robert Griebl350d26b2002-12-03 22:45:46 +00001505 }
Robert Griebl350d26b2002-12-03 22:45:46 +00001506}
Denys Vlasenkobede2152011-09-04 16:12:33 +02001507# endif
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001508# else
1509# define load_history(a) ((void)0)
1510# define save_history(a) ((void)0)
1511# endif /* FEATURE_COMMAND_SAVEHISTORY */
Robert Griebl350d26b2002-12-03 22:45:46 +00001512
Denis Vlasenko57abf9e2009-03-22 19:00:05 +00001513static void remember_in_history(char *str)
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001514{
1515 int i;
1516
1517 if (!(state->flags & DO_HISTORY))
1518 return;
Denis Vlasenko682ad302008-09-27 01:28:56 +00001519 if (str[0] == '\0')
1520 return;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001521 i = state->cnt_history;
Denis Vlasenko682ad302008-09-27 01:28:56 +00001522 /* Don't save dupes */
1523 if (i && strcmp(state->history[i-1], str) == 0)
1524 return;
1525
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001526 free(state->history[state->max_history]); /* redundant, paranoia */
1527 state->history[state->max_history] = NULL; /* redundant, paranoia */
Denis Vlasenko682ad302008-09-27 01:28:56 +00001528
1529 /* If history[] is full, remove the oldest command */
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001530 /* we need to keep history[state->max_history] empty, hence >=, not > */
1531 if (i >= state->max_history) {
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001532 free(state->history[0]);
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001533 for (i = 0; i < state->max_history-1; i++)
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001534 state->history[i] = state->history[i+1];
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001535 /* i == state->max_history-1 */
Denys Vlasenkoc0cae522011-11-04 01:09:09 +01001536# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1537 if (state->cnt_history_in_file)
Denys Vlasenkobede2152011-09-04 16:12:33 +02001538 state->cnt_history_in_file--;
Denys Vlasenkoc0cae522011-11-04 01:09:09 +01001539# endif
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001540 }
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001541 /* i <= state->max_history-1 */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001542 state->history[i++] = xstrdup(str);
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02001543 /* i <= state->max_history */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001544 state->cur_history = i;
1545 state->cnt_history = i;
Denys Vlasenkobede2152011-09-04 16:12:33 +02001546# if ENABLE_FEATURE_EDITING_SAVEHISTORY && !ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1547 save_history(str);
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001548# endif
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001549}
1550
1551#else /* MAX_HISTORY == 0 */
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001552# define remember_in_history(a) ((void)0)
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001553#endif /* MAX_HISTORY */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00001554
1555
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01001556#if ENABLE_FEATURE_EDITING_VI
Erik Andersen6273f652000-03-17 01:12:41 +00001557/*
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001558 * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
Erik Andersen6273f652000-03-17 01:12:41 +00001559 */
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001560static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001561vi_Word_motion(int eat)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001562{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001563 CHAR_T *command = command_ps;
1564
1565 while (cursor < command_len && !BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001566 input_forward();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001567 if (eat) while (cursor < command_len && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001568 input_forward();
1569}
1570
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001571static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001572vi_word_motion(int eat)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001573{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001574 CHAR_T *command = command_ps;
1575
1576 if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
Denis Vlasenko253ce002007-01-22 08:34:44 +00001577 while (cursor < command_len
Denys Vlasenko13028922009-07-12 00:51:15 +02001578 && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
1579 ) {
Paul Fox3f11b1b2005-08-04 19:04:46 +00001580 input_forward();
Denys Vlasenko13028922009-07-12 00:51:15 +02001581 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001582 } else if (BB_ispunct(command[cursor])) {
1583 while (cursor < command_len && BB_ispunct(command[cursor+1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001584 input_forward();
1585 }
1586
Denis Vlasenko253ce002007-01-22 08:34:44 +00001587 if (cursor < command_len)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001588 input_forward();
1589
Denys Vlasenko13028922009-07-12 00:51:15 +02001590 if (eat) {
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001591 while (cursor < command_len && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001592 input_forward();
Denys Vlasenko13028922009-07-12 00:51:15 +02001593 }
Paul Fox3f11b1b2005-08-04 19:04:46 +00001594}
1595
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001596static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001597vi_End_motion(void)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001598{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001599 CHAR_T *command = command_ps;
1600
Paul Fox3f11b1b2005-08-04 19:04:46 +00001601 input_forward();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001602 while (cursor < command_len && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001603 input_forward();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001604 while (cursor < command_len-1 && !BB_isspace(command[cursor+1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001605 input_forward();
1606}
1607
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001608static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001609vi_end_motion(void)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001610{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001611 CHAR_T *command = command_ps;
1612
Denis Vlasenko253ce002007-01-22 08:34:44 +00001613 if (cursor >= command_len-1)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001614 return;
1615 input_forward();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001616 while (cursor < command_len-1 && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001617 input_forward();
Denis Vlasenko253ce002007-01-22 08:34:44 +00001618 if (cursor >= command_len-1)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001619 return;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001620 if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
Denis Vlasenko253ce002007-01-22 08:34:44 +00001621 while (cursor < command_len-1
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001622 && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001623 ) {
Paul Fox3f11b1b2005-08-04 19:04:46 +00001624 input_forward();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001625 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001626 } else if (BB_ispunct(command[cursor])) {
1627 while (cursor < command_len-1 && BB_ispunct(command[cursor+1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001628 input_forward();
1629 }
1630}
1631
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001632static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001633vi_Back_motion(void)
Paul Fox3f11b1b2005-08-04 19:04:46 +00001634{
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001635 CHAR_T *command = command_ps;
1636
1637 while (cursor > 0 && BB_isspace(command[cursor-1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001638 input_backward(1);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001639 while (cursor > 0 && !BB_isspace(command[cursor-1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001640 input_backward(1);
1641}
1642
"Vladimir N. Oleynik"e4baaa22005-09-22 12:59:26 +00001643static void
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001644vi_back_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 if (cursor <= 0)
1649 return;
1650 input_backward(1);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001651 while (cursor > 0 && BB_isspace(command[cursor]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001652 input_backward(1);
1653 if (cursor <= 0)
1654 return;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001655 if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001656 while (cursor > 0
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001657 && (BB_isalnum(command[cursor-1]) || command[cursor-1] == '_')
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001658 ) {
Paul Fox3f11b1b2005-08-04 19:04:46 +00001659 input_backward(1);
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00001660 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001661 } else if (BB_ispunct(command[cursor])) {
1662 while (cursor > 0 && BB_ispunct(command[cursor-1]))
Paul Fox3f11b1b2005-08-04 19:04:46 +00001663 input_backward(1);
1664 }
1665}
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001666#endif
1667
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01001668/* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
1669static void ctrl_left(void)
1670{
1671 CHAR_T *command = command_ps;
1672
1673 while (1) {
1674 CHAR_T c;
1675
1676 input_backward(1);
1677 if (cursor == 0)
1678 break;
1679 c = command[cursor];
1680 if (c != ' ' && !BB_ispunct(c)) {
1681 /* we reached a "word" delimited by spaces/punct.
1682 * go to its beginning */
1683 while (1) {
1684 c = command[cursor - 1];
1685 if (c == ' ' || BB_ispunct(c))
1686 break;
1687 input_backward(1);
1688 if (cursor == 0)
1689 break;
1690 }
1691 break;
1692 }
1693 }
1694}
1695static void ctrl_right(void)
1696{
1697 CHAR_T *command = command_ps;
1698
1699 while (1) {
1700 CHAR_T c;
1701
1702 c = command[cursor];
1703 if (c == BB_NUL)
1704 break;
1705 if (c != ' ' && !BB_ispunct(c)) {
1706 /* we reached a "word" delimited by spaces/punct.
1707 * go to its end + 1 */
1708 while (1) {
1709 input_forward();
1710 c = command[cursor];
1711 if (c == BB_NUL || c == ' ' || BB_ispunct(c))
1712 break;
1713 }
1714 break;
1715 }
1716 input_forward();
1717 }
1718}
1719
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001720
1721/*
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001722 * read_line_input and its helpers
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001723 */
1724
Denys Vlasenko13ad9062009-11-11 03:19:30 +01001725#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
1726static void ask_terminal(void)
1727{
1728 /* Ask terminal where is the cursor now.
1729 * lineedit_read_key handles response and corrects
1730 * our idea of current cursor position.
1731 * Testcase: run "echo -n long_line_long_line_long_line",
1732 * then type in a long, wrapping command and try to
1733 * delete it using backspace key.
1734 * Note: we print it _after_ prompt, because
1735 * prompt may contain CR. Example: PS1='\[\r\n\]\w '
1736 */
1737 /* Problem: if there is buffered input on stdin,
1738 * the response will be delivered later,
1739 * possibly to an unsuspecting application.
1740 * Testcase: "sleep 1; busybox ash" + press and hold [Enter].
1741 * Result:
1742 * ~/srcdevel/bbox/fix/busybox.t4 #
1743 * ~/srcdevel/bbox/fix/busybox.t4 #
1744 * ^[[59;34~/srcdevel/bbox/fix/busybox.t4 # <-- garbage
1745 * ~/srcdevel/bbox/fix/busybox.t4 #
1746 *
1747 * Checking for input with poll only makes the race narrower,
1748 * I still can trigger it. Strace:
1749 *
1750 * write(1, "~/srcdevel/bbox/fix/busybox.t4 # ", 33) = 33
1751 * poll([{fd=0, events=POLLIN}], 1, 0) = 0 (Timeout) <-- no input exists
1752 * write(1, "\33[6n", 4) = 4 <-- send the ESC sequence, quick!
Alexey Fomenko232ebaa2011-05-20 04:26:29 +02001753 * poll([{fd=0, events=POLLIN}], 1, -1) = 1 ([{fd=0, revents=POLLIN}])
Denys Vlasenko13ad9062009-11-11 03:19:30 +01001754 * read(0, "\n", 1) = 1 <-- oh crap, user's input got in first
1755 */
Denys Vlasenko451add42010-07-25 00:06:41 +02001756 struct pollfd pfd;
Denys Vlasenko13ad9062009-11-11 03:19:30 +01001757
Denys Vlasenko451add42010-07-25 00:06:41 +02001758 pfd.fd = STDIN_FILENO;
1759 pfd.events = POLLIN;
1760 if (safe_poll(&pfd, 1, 0) == 0) {
1761 S.sent_ESC_br6n = 1;
Marek Polacek7b181072010-10-28 21:34:56 +02001762 fputs(ESC"[6n", stdout);
Denys Vlasenko451add42010-07-25 00:06:41 +02001763 fflush_all(); /* make terminal see it ASAP! */
Denys Vlasenko13ad9062009-11-11 03:19:30 +01001764 }
1765}
1766#else
1767#define ask_terminal() ((void)0)
1768#endif
1769
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001770/* Called just once at read_line_input() init time */
Denis Vlasenko38f63192007-01-22 09:03:07 +00001771#if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00001772static void parse_and_put_prompt(const char *prmt_ptr)
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001773{
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001774 const char *p;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001775 cmdedit_prompt = prmt_ptr;
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001776 p = strrchr(prmt_ptr, '\n');
1777 cmdedit_prmt_len = unicode_strlen(p ? p+1 : prmt_ptr);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001778 put_prompt();
1779}
1780#else
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00001781static void parse_and_put_prompt(const char *prmt_ptr)
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001782{
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001783 int prmt_size = 0;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001784 char *prmt_mem_ptr = xzalloc(1);
Denys Vlasenko1d145692013-03-29 13:09:05 +01001785# if ENABLE_USERNAME_OR_HOMEDIR
1786 char *cwd_buf = NULL;
1787# endif
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001788 char flg_not_length = '[';
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001789 char cbuf[2];
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001790
Denys Vlasenko7a180432013-08-19 16:44:05 +02001791 /*cmdedit_prmt_len = 0; - already is */
Denis Vlasenko6258fd32007-01-22 07:30:26 +00001792
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001793 cbuf[1] = '\0'; /* never changes */
1794
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001795 while (*prmt_ptr) {
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001796 char timebuf[sizeof("HH:MM:SS")];
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001797 char *free_me = NULL;
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001798 char *pbuf;
1799 char c;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001800
1801 pbuf = cbuf;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001802 c = *prmt_ptr++;
1803 if (c == '\\') {
Denys Vlasenko1d145692013-03-29 13:09:05 +01001804 const char *cp;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001805 int l;
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001806/*
1807 * Supported via bb_process_escape_sequence:
1808 * \a ASCII bell character (07)
1809 * \e ASCII escape character (033)
1810 * \n newline
1811 * \r carriage return
1812 * \\ backslash
1813 * \nnn char with octal code nnn
1814 * Supported:
1815 * \$ if the effective UID is 0, a #, otherwise a $
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001816 * \w current working directory, with $HOME abbreviated with a tilde
1817 * Note: we do not support $PROMPT_DIRTRIM=n feature
Denys Vlasenko1d145692013-03-29 13:09:05 +01001818 * \W basename of the current working directory, with $HOME abbreviated with a tilde
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001819 * \h hostname up to the first '.'
1820 * \H hostname
1821 * \u username
1822 * \[ begin a sequence of non-printing characters
1823 * \] end a sequence of non-printing characters
Denys Vlasenko1d145692013-03-29 13:09:05 +01001824 * \T current time in 12-hour HH:MM:SS format
1825 * \@ current time in 12-hour am/pm format
1826 * \A current time in 24-hour HH:MM format
1827 * \t current time in 24-hour HH:MM:SS format
1828 * (all of the above work as \A)
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001829 * Not supported:
Denys Vlasenko1d145692013-03-29 13:09:05 +01001830 * \! history number of this command
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001831 * \# command number of this command
1832 * \j number of jobs currently managed by the shell
1833 * \l basename of the shell's terminal device name
1834 * \s name of the shell, the basename of $0 (the portion following the final slash)
1835 * \V release of bash, version + patch level (e.g., 2.00.0)
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001836 * \d date in "Weekday Month Date" format (e.g., "Tue May 26")
1837 * \D{format}
1838 * format is passed to strftime(3).
1839 * An empty format results in a locale-specific time representation.
1840 * The braces are required.
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001841 * Mishandled by bb_process_escape_sequence:
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001842 * \v version of bash (e.g., 2.00)
1843 */
Denys Vlasenko1d145692013-03-29 13:09:05 +01001844 cp = prmt_ptr;
1845 c = *cp;
1846 if (c != 't') /* don't treat \t as tab */
1847 c = bb_process_escape_sequence(&prmt_ptr);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001848 if (prmt_ptr == cp) {
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00001849 if (*cp == '\0')
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001850 break;
1851 c = *prmt_ptr++;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001852
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001853 switch (c) {
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02001854# if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001855 case 'u':
Denis Vlasenko86b29ea2007-09-27 10:17:16 +00001856 pbuf = user_buf ? user_buf : (char*)"";
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001857 break;
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02001858# endif
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001859 case 'H':
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001860 case 'h':
Denis Vlasenko6f1713f2008-02-25 23:23:58 +00001861 pbuf = free_me = safe_gethostname();
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001862 if (c == 'h')
1863 strchrnul(pbuf, '.')[0] = '\0';
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001864 break;
1865 case '$':
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001866 c = (geteuid() == 0 ? '#' : '$');
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001867 break;
Denys Vlasenko1d145692013-03-29 13:09:05 +01001868 case 'T': /* 12-hour HH:MM:SS format */
1869 case '@': /* 12-hour am/pm format */
1870 case 'A': /* 24-hour HH:MM format */
1871 case 't': /* 24-hour HH:MM:SS format */
1872 /* We show all of them as 24-hour HH:MM */
1873 strftime_HHMMSS(timebuf, sizeof(timebuf), NULL)[-3] = '\0';
1874 pbuf = timebuf;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001875 break;
Denys Vlasenko1d145692013-03-29 13:09:05 +01001876# if ENABLE_USERNAME_OR_HOMEDIR
1877 case 'w': /* current dir */
1878 case 'W': /* basename of cur dir */
1879 if (!cwd_buf) {
1880 cwd_buf = xrealloc_getcwd_or_warn(NULL);
1881 if (!cwd_buf)
1882 cwd_buf = (char *)bb_msg_unknown;
1883 else {
1884 /* /home/user[/something] -> ~[/something] */
1885 l = strlen(home_pwd_buf);
1886 if (l != 0
1887 && strncmp(home_pwd_buf, cwd_buf, l) == 0
1888 && (cwd_buf[l] == '/' || cwd_buf[l] == '\0')
1889 ) {
1890 cwd_buf[0] = '~';
1891 overlapping_strcpy(cwd_buf + 1, cwd_buf + l);
1892 }
1893 }
1894 }
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001895 pbuf = cwd_buf;
Denys Vlasenko1d145692013-03-29 13:09:05 +01001896 if (c == 'w')
1897 break;
Denis Vlasenkodc757aa2007-06-30 08:04:05 +00001898 cp = strrchr(pbuf, '/');
Denys Vlasenko8172d052013-03-29 13:21:53 +01001899 if (cp)
Denys Vlasenko1d145692013-03-29 13:09:05 +01001900 pbuf = (char*)cp + 1;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001901 break;
Denys Vlasenko1d145692013-03-29 13:09:05 +01001902# endif
Denys Vlasenko6c852bf2013-03-28 13:20:12 +01001903// bb_process_escape_sequence does this now:
1904// case 'e': case 'E': /* \e \E = \033 */
1905// c = '\033';
1906// break;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001907 case 'x': case 'X': {
1908 char buf2[4];
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001909 for (l = 0; l < 3;) {
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001910 unsigned h;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001911 buf2[l++] = *prmt_ptr;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001912 buf2[l] = '\0';
1913 h = strtoul(buf2, &pbuf, 16);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001914 if (h > UCHAR_MAX || (pbuf - buf2) < l) {
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001915 buf2[--l] = '\0';
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001916 break;
1917 }
1918 prmt_ptr++;
1919 }
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001920 c = (char)strtoul(buf2, NULL, 16);
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001921 if (c == 0)
1922 c = '?';
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001923 pbuf = cbuf;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001924 break;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001925 }
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001926 case '[': case ']':
1927 if (c == flg_not_length) {
Denys Vlasenko7a180432013-08-19 16:44:05 +02001928 /* Toggle '['/']' hex 5b/5d */
1929 flg_not_length ^= 6;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001930 continue;
1931 }
1932 break;
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001933 } /* switch */
1934 } /* if */
1935 } /* if */
1936 cbuf[0] = c;
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001937 {
1938 int n = strlen(pbuf);
1939 prmt_size += n;
1940 if (c == '\n')
1941 cmdedit_prmt_len = 0;
1942 else if (flg_not_length != ']') {
1943#if 0 /*ENABLE_UNICODE_SUPPORT*/
1944/* Won't work, pbuf is one BYTE string here instead of an one Unicode char string. */
1945/* FIXME */
1946 cmdedit_prmt_len += unicode_strlen(pbuf);
Denys Vlasenko7a180432013-08-19 16:44:05 +02001947#else
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001948 cmdedit_prmt_len += n;
Denys Vlasenko7a180432013-08-19 16:44:05 +02001949#endif
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001950 }
Denys Vlasenko7a180432013-08-19 16:44:05 +02001951 }
Denys Vlasenkoe66a56d2013-08-19 16:45:04 +02001952 prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_size+1), pbuf);
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001953 free(free_me);
1954 } /* while */
1955
Denys Vlasenko1d145692013-03-29 13:09:05 +01001956# if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko7221c8c2007-12-03 10:45:14 +00001957 if (cwd_buf != (char *)bb_msg_unknown)
1958 free(cwd_buf);
Denys Vlasenko1d145692013-03-29 13:09:05 +01001959# endif
Denis Vlasenko82b39e82007-01-21 19:18:19 +00001960 cmdedit_prompt = prmt_mem_ptr;
1961 put_prompt();
1962}
Paul Fox3f11b1b2005-08-04 19:04:46 +00001963#endif
1964
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001965static void cmdedit_setwidth(unsigned w, int redraw_flg)
1966{
1967 cmdedit_termw = w;
1968 if (redraw_flg) {
1969 /* new y for current cursor */
1970 int new_y = (cursor + cmdedit_prmt_len) / w;
1971 /* redraw */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00001972 redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
Denys Vlasenko8131eea2009-11-02 14:19:51 +01001973 fflush_all();
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001974 }
1975}
1976
1977static void win_changed(int nsig)
1978{
Denys Vlasenko55241fa2010-07-18 22:53:06 +02001979 int sv_errno = errno;
Denis Vlasenko55995022008-05-18 22:28:26 +00001980 unsigned width;
Alexey Fomenko232ebaa2011-05-20 04:26:29 +02001981
Denys Vlasenko451add42010-07-25 00:06:41 +02001982 get_terminal_width_height(0, &width, NULL);
Alexey Fomenko232ebaa2011-05-20 04:26:29 +02001983//FIXME: cmdedit_setwidth() -> redraw() -> printf() -> KABOOM! (we are in signal handler!)
1984 cmdedit_setwidth(width, /*redraw_flg:*/ nsig);
1985
Denys Vlasenko55241fa2010-07-18 22:53:06 +02001986 errno = sv_errno;
Denis Vlasenko5592fac2007-01-21 19:19:46 +00001987}
1988
Denys Vlasenko66c5b122011-02-08 05:07:02 +01001989static int lineedit_read_key(char *read_key_buffer, int timeout)
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02001990{
Denys Vlasenko020f4062009-05-17 16:44:54 +02001991 int64_t ic;
Denys Vlasenko19158a82010-03-26 14:06:56 +01001992#if ENABLE_UNICODE_SUPPORT
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02001993 char unicode_buf[MB_CUR_MAX + 1];
1994 int unicode_idx = 0;
1995#endif
Denys Vlasenko020f4062009-05-17 16:44:54 +02001996
Denys Vlasenko58f108e2010-03-11 21:17:55 +01001997 while (1) {
1998 /* Wait for input. TIMEOUT = -1 makes read_key wait even
1999 * on nonblocking stdin, TIMEOUT = 50 makes sure we won't
2000 * insist on full MB_CUR_MAX buffer to declare input like
2001 * "\xff\n",pause,"ls\n" invalid and thus won't lose "ls".
2002 *
2003 * Note: read_key sets errno to 0 on success.
2004 */
2005 ic = read_key(STDIN_FILENO, read_key_buffer, timeout);
2006 if (errno) {
Denys Vlasenko19158a82010-03-26 14:06:56 +01002007#if ENABLE_UNICODE_SUPPORT
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002008 if (errno == EAGAIN && unicode_idx != 0)
2009 goto pushback;
Denys Vlasenko1f6d2302009-10-29 03:45:26 +01002010#endif
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002011 break;
Denys Vlasenko4b7db4f2009-05-29 10:39:06 +02002012 }
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002013
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002014#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
2015 if ((int32_t)ic == KEYCODE_CURSOR_POS
Denys Vlasenkod83bbf42009-10-27 10:47:49 +01002016 && S.sent_ESC_br6n
Denys Vlasenko020f4062009-05-17 16:44:54 +02002017 ) {
Denys Vlasenkod83bbf42009-10-27 10:47:49 +01002018 S.sent_ESC_br6n = 0;
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002019 if (cursor == 0) { /* otherwise it may be bogus */
2020 int col = ((ic >> 32) & 0x7fff) - 1;
Denys Vlasenko7a180432013-08-19 16:44:05 +02002021 /*
2022 * Is col > cmdedit_prmt_len?
2023 * If yes (terminal says cursor is farther to the right
2024 * of where we think it should be),
2025 * the prompt wasn't printed starting at col 1,
2026 * there was additional text before it.
2027 */
2028 if ((int)(col - cmdedit_prmt_len) > 0) {
2029 /* Fix our understanding of current x position */
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002030 cmdedit_x += (col - cmdedit_prmt_len);
2031 while (cmdedit_x >= cmdedit_termw) {
2032 cmdedit_x -= cmdedit_termw;
2033 cmdedit_y++;
2034 }
Denys Vlasenko020f4062009-05-17 16:44:54 +02002035 }
2036 }
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002037 continue;
Denys Vlasenko020f4062009-05-17 16:44:54 +02002038 }
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002039#endif
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002040
Denys Vlasenko19158a82010-03-26 14:06:56 +01002041#if ENABLE_UNICODE_SUPPORT
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002042 if (unicode_status == UNICODE_ON) {
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002043 wchar_t wc;
2044
2045 if ((int32_t)ic < 0) /* KEYCODE_xxx */
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002046 break;
2047 // TODO: imagine sequence like: 0xff,<left-arrow>: we are currently losing 0xff...
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002048
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002049 unicode_buf[unicode_idx++] = ic;
2050 unicode_buf[unicode_idx] = '\0';
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002051 if (mbstowcs(&wc, unicode_buf, 1) != 1) {
2052 /* Not (yet?) a valid unicode char */
2053 if (unicode_idx < MB_CUR_MAX) {
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002054 timeout = 50;
2055 continue;
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002056 }
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002057 pushback:
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002058 /* Invalid sequence. Save all "bad bytes" except first */
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002059 read_key_ungets(read_key_buffer, unicode_buf + 1, unicode_idx - 1);
Tomas Heinricha659b812010-04-29 13:43:39 +02002060# if !ENABLE_UNICODE_PRESERVE_BROKEN
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002061 ic = CONFIG_SUBST_WCHAR;
Tomas Heinricha659b812010-04-29 13:43:39 +02002062# else
Tomas Heinrichb8909c52010-05-16 20:46:53 +02002063 ic = unicode_mark_raw_byte(unicode_buf[0]);
Tomas Heinricha659b812010-04-29 13:43:39 +02002064# endif
Tomas Heinrichd2b04052010-03-09 14:09:24 +01002065 } else {
2066 /* Valid unicode char, return its code */
2067 ic = wc;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002068 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002069 }
2070#endif
Denys Vlasenko58f108e2010-03-11 21:17:55 +01002071 break;
2072 }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002073
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002074 return ic;
2075}
2076
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002077#if ENABLE_UNICODE_BIDI_SUPPORT
2078static int isrtl_str(void)
2079{
2080 int idx = cursor;
Tomas Heinrichaa167552010-03-26 13:13:24 +01002081
2082 while (idx < command_len && unicode_bidi_is_neutral_wchar(command_ps[idx]))
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002083 idx++;
Tomas Heinrichaa167552010-03-26 13:13:24 +01002084 return unicode_bidi_isrtl(command_ps[idx]);
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002085}
2086#else
2087# define isrtl_str() 0
2088#endif
2089
Paul Fox0f2dd9f2006-03-07 20:26:11 +00002090/* leave out the "vi-mode"-only case labels if vi editing isn't
2091 * configured. */
Denys Vlasenko13028922009-07-12 00:51:15 +02002092#define vi_case(caselabel) IF_FEATURE_EDITING_VI(case caselabel)
Paul Fox3f11b1b2005-08-04 19:04:46 +00002093
2094/* convert uppercase ascii to equivalent control char, for readability */
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002095#undef CTRL
2096#define CTRL(a) ((a) & ~0x40)
Paul Fox3f11b1b2005-08-04 19:04:46 +00002097
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002098enum {
2099 VI_CMDMODE_BIT = 0x40000000,
2100 /* 0x80000000 bit flags KEYCODE_xxx */
2101};
2102
2103#if ENABLE_FEATURE_REVERSE_SEARCH
2104/* Mimic readline Ctrl-R reverse history search.
2105 * When invoked, it shows the following prompt:
2106 * (reverse-i-search)'': user_input [cursor pos unchanged by Ctrl-R]
2107 * and typing results in search being performed:
2108 * (reverse-i-search)'tmp': cd /tmp [cursor under t in /tmp]
2109 * Search is performed by looking at progressively older lines in history.
2110 * Ctrl-R again searches for the next match in history.
2111 * Backspace deletes last matched char.
2112 * Control keys exit search and return to normal editing (at current history line).
2113 */
2114static int32_t reverse_i_search(void)
2115{
2116 char match_buf[128]; /* for user input */
2117 char read_key_buffer[KEYCODE_BUFFER_SIZE];
2118 const char *matched_history_line;
2119 const char *saved_prompt;
Denys Vlasenko7a180432013-08-19 16:44:05 +02002120 unsigned saved_prmt_len;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002121 int32_t ic;
2122
2123 matched_history_line = NULL;
2124 read_key_buffer[0] = 0;
2125 match_buf[0] = '\0';
2126
2127 /* Save and replace the prompt */
2128 saved_prompt = cmdedit_prompt;
Denys Vlasenko7a180432013-08-19 16:44:05 +02002129 saved_prmt_len = cmdedit_prmt_len;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002130 goto set_prompt;
2131
2132 while (1) {
2133 int h;
2134 unsigned match_buf_len = strlen(match_buf);
2135
2136 fflush_all();
2137//FIXME: correct timeout?
2138 ic = lineedit_read_key(read_key_buffer, -1);
2139
2140 switch (ic) {
2141 case CTRL('R'): /* searching for the next match */
2142 break;
2143
2144 case '\b':
2145 case '\x7f':
2146 /* Backspace */
2147 if (unicode_status == UNICODE_ON) {
2148 while (match_buf_len != 0) {
2149 uint8_t c = match_buf[--match_buf_len];
2150 if ((c & 0xc0) != 0x80) /* start of UTF-8 char? */
2151 break; /* yes */
2152 }
2153 } else {
2154 if (match_buf_len != 0)
2155 match_buf_len--;
2156 }
2157 match_buf[match_buf_len] = '\0';
2158 break;
2159
2160 default:
2161 if (ic < ' '
2162 || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
2163 || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
2164 ) {
2165 goto ret;
2166 }
2167
2168 /* Append this char */
2169#if ENABLE_UNICODE_SUPPORT
2170 if (unicode_status == UNICODE_ON) {
2171 mbstate_t mbstate = { 0 };
2172 char buf[MB_CUR_MAX + 1];
2173 int len = wcrtomb(buf, ic, &mbstate);
2174 if (len > 0) {
2175 buf[len] = '\0';
2176 if (match_buf_len + len < sizeof(match_buf))
2177 strcpy(match_buf + match_buf_len, buf);
2178 }
2179 } else
2180#endif
2181 if (match_buf_len < sizeof(match_buf) - 1) {
2182 match_buf[match_buf_len] = ic;
2183 match_buf[match_buf_len + 1] = '\0';
2184 }
2185 break;
2186 } /* switch (ic) */
2187
2188 /* Search in history for match_buf */
2189 h = state->cur_history;
2190 if (ic == CTRL('R'))
2191 h--;
2192 while (h >= 0) {
2193 if (state->history[h]) {
2194 char *match = strstr(state->history[h], match_buf);
2195 if (match) {
2196 state->cur_history = h;
2197 matched_history_line = state->history[h];
2198 command_len = load_string(matched_history_line);
2199 cursor = match - matched_history_line;
2200//FIXME: cursor position for Unicode case
2201
2202 free((char*)cmdedit_prompt);
2203 set_prompt:
2204 cmdedit_prompt = xasprintf("(reverse-i-search)'%s': ", match_buf);
Denys Vlasenko7a180432013-08-19 16:44:05 +02002205 cmdedit_prmt_len = unicode_strlen(cmdedit_prompt);
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002206 goto do_redraw;
2207 }
2208 }
2209 h--;
2210 }
2211
2212 /* Not found */
2213 match_buf[match_buf_len] = '\0';
2214 beep();
2215 continue;
2216
2217 do_redraw:
2218 redraw(cmdedit_y, command_len - cursor);
2219 } /* while (1) */
2220
2221 ret:
2222 if (matched_history_line)
2223 command_len = load_string(matched_history_line);
2224
2225 free((char*)cmdedit_prompt);
2226 cmdedit_prompt = saved_prompt;
Denys Vlasenko7a180432013-08-19 16:44:05 +02002227 cmdedit_prmt_len = saved_prmt_len;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002228 redraw(cmdedit_y, command_len - cursor);
2229
2230 return ic;
2231}
2232#endif
2233
Denys Vlasenko5c2e81b2009-07-16 14:14:34 +02002234/* maxsize must be >= 2.
2235 * Returns:
Denis Vlasenko80667e32008-02-02 18:35:55 +00002236 * -1 on read errors or EOF, or on bare Ctrl-D,
2237 * 0 on ctrl-C (the line entered is still returned in 'command'),
Denis Vlasenko6a5377a2007-09-25 18:35:28 +00002238 * >0 length of input string, including terminating '\n'
2239 */
Denys Vlasenko66c5b122011-02-08 05:07:02 +01002240int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout)
Erik Andersen13456d12000-03-16 08:09:57 +00002241{
Denis Vlasenkof31c3b62008-08-20 00:46:32 +00002242 int len;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002243#if ENABLE_FEATURE_TAB_COMPLETION
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02002244 smallint lastWasTab = 0;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002245#endif
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002246 smallint break_out = 0;
Denis Vlasenko38f63192007-01-22 09:03:07 +00002247#if ENABLE_FEATURE_EDITING_VI
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002248 smallint vi_cmdmode = 0;
Paul Fox3f11b1b2005-08-04 19:04:46 +00002249#endif
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002250 struct termios initial_settings;
2251 struct termios new_settings;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002252 char read_key_buffer[KEYCODE_BUFFER_SIZE];
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002253
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002254 INIT_S();
2255
2256 if (tcgetattr(STDIN_FILENO, &initial_settings) < 0
2257 || !(initial_settings.c_lflag & ECHO)
2258 ) {
2259 /* Happens when e.g. stty -echo was run before */
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002260 parse_and_put_prompt(prompt);
Denys Vlasenko8131eea2009-11-02 14:19:51 +01002261 /* fflush_all(); - done by parse_and_put_prompt */
Denis Vlasenko9cb220b2007-12-09 10:03:28 +00002262 if (fgets(command, maxsize, stdin) == NULL)
2263 len = -1; /* EOF or error */
2264 else
2265 len = strlen(command);
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002266 DEINIT_S();
2267 return len;
Denis Vlasenko037576d2007-10-20 18:30:38 +00002268 }
2269
Denys Vlasenko28055022010-01-04 20:49:58 +01002270 init_unicode();
Denys Vlasenko42a8fd02009-07-11 21:36:13 +02002271
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002272// FIXME: audit & improve this
Denis Vlasenkoe8a07882007-06-10 15:08:44 +00002273 if (maxsize > MAX_LINELEN)
2274 maxsize = MAX_LINELEN;
Denys Vlasenko044b1802009-07-12 02:50:35 +02002275 S.maxsize = maxsize;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002276
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02002277 /* With zero flags, no other fields are ever used */
Denis Vlasenko703e2022007-01-22 14:12:08 +00002278 state = st ? st : (line_input_t*) &const_int_0;
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02002279#if MAX_HISTORY > 0
2280# if ENABLE_FEATURE_EDITING_SAVEHISTORY
Denys Vlasenkoe45af7a2011-09-04 16:15:24 +02002281 if (state->hist_file)
Denis Vlasenkoc0ea82a2009-03-23 06:33:37 +00002282 if (state->cnt_history == 0)
2283 load_history(state);
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02002284# endif
Denis Vlasenko3c385cd2008-11-02 00:41:05 +00002285 if (state->flags & DO_HISTORY)
2286 state->cur_history = state->cnt_history;
Denys Vlasenkodb9c57e2009-09-27 02:48:53 +02002287#endif
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002288
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002289 /* prepare before init handlers */
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +00002290 cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002291 command_len = 0;
Denys Vlasenko19158a82010-03-26 14:06:56 +01002292#if ENABLE_UNICODE_SUPPORT
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002293 command_ps = xzalloc(maxsize * sizeof(command_ps[0]));
2294#else
Mark Whitley4e338752001-01-26 20:42:23 +00002295 command_ps = command;
Denis Vlasenko47bdb3a2007-01-21 19:18:59 +00002296 command[0] = '\0';
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002297#endif
2298#define command command_must_not_be_used
Mark Whitley4e338752001-01-26 20:42:23 +00002299
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002300 new_settings = initial_settings;
Denys Vlasenko7ce209b2012-01-15 22:58:06 +01002301 /* ~ICANON: unbuffered input (most c_cc[] are disabled, VMIN/VTIME are enabled) */
2302 /* ~ECHO, ~ECHONL: turn off echoing, including newline echoing */
2303 /* ~ISIG: turn off INTR (ctrl-C), QUIT, SUSP */
2304 new_settings.c_lflag &= ~(ICANON | ECHO | ECHONL | ISIG);
2305 /* reads would block only if < 1 char is available */
Eric Andersen34506362001-08-02 05:02:46 +00002306 new_settings.c_cc[VMIN] = 1;
Denys Vlasenko7ce209b2012-01-15 22:58:06 +01002307 /* no timeout (reads block forever) */
Eric Andersen34506362001-08-02 05:02:46 +00002308 new_settings.c_cc[VTIME] = 0;
Denys Vlasenko7ce209b2012-01-15 22:58:06 +01002309 /* Should be not needed if ISIG is off: */
2310 /* Turn off CTRL-C */
2311 /* new_settings.c_cc[VINTR] = _POSIX_VDISABLE; */
Denis Vlasenko202ac502008-11-05 13:20:58 +00002312 tcsetattr_stdin_TCSANOW(&new_settings);
Erik Andersen13456d12000-03-16 08:09:57 +00002313
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02002314#if ENABLE_USERNAME_OR_HOMEDIR
Denis Vlasenko6258fd32007-01-22 07:30:26 +00002315 {
2316 struct passwd *entry;
2317
2318 entry = getpwuid(geteuid());
2319 if (entry) {
2320 user_buf = xstrdup(entry->pw_name);
2321 home_pwd_buf = xstrdup(entry->pw_dir);
2322 }
2323 }
2324#endif
Denis Vlasenko682ad302008-09-27 01:28:56 +00002325
2326#if 0
Denys Vlasenko2c4de5b2011-03-31 13:16:52 +02002327 for (i = 0; i <= state->max_history; i++)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002328 bb_error_msg("history[%d]:'%s'", i, state->history[i]);
Denis Vlasenko682ad302008-09-27 01:28:56 +00002329 bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
2330#endif
2331
Denys Vlasenko13ad9062009-11-11 03:19:30 +01002332 /* Print out the command prompt, optionally ask where cursor is */
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002333 parse_and_put_prompt(prompt);
Denys Vlasenko13ad9062009-11-11 03:19:30 +01002334 ask_terminal();
Eric Andersenb3dc3b82001-01-04 11:08:45 +00002335
Alexey Fomenko232ebaa2011-05-20 04:26:29 +02002336 /* Install window resize handler (NB: after *all* init is complete) */
2337//FIXME: save entire sigaction!
2338 previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
2339 win_changed(0); /* get initial window size */
2340
Denys Vlasenkoc396fe62009-05-17 19:28:14 +02002341 read_key_buffer[0] = 0;
Erik Andersenc7c634b2000-03-19 05:28:55 +00002342 while (1) {
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002343 /*
2344 * The emacs and vi modes share much of the code in the big
2345 * command loop. Commands entered when in vi's command mode
2346 * (aka "escape mode") get an extra bit added to distinguish
2347 * them - this keeps them from being self-inserted. This
2348 * clutters the big switch a bit, but keeps all the code
2349 * in one place.
2350 */
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002351 int32_t ic, ic_raw;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002352
Denys Vlasenko8131eea2009-11-02 14:19:51 +01002353 fflush_all();
Denys Vlasenko66c5b122011-02-08 05:07:02 +01002354 ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
Paul Fox0f2dd9f2006-03-07 20:26:11 +00002355
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002356#if ENABLE_FEATURE_REVERSE_SEARCH
2357 again:
2358#endif
Denis Vlasenko38f63192007-01-22 09:03:07 +00002359#if ENABLE_FEATURE_EDITING_VI
Paul Fox3f11b1b2005-08-04 19:04:46 +00002360 newdelflag = 1;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002361 if (vi_cmdmode) {
2362 /* btw, since KEYCODE_xxx are all < 0, this doesn't
2363 * change ic if it contains one of them: */
2364 ic |= VI_CMDMODE_BIT;
2365 }
Paul Fox3f11b1b2005-08-04 19:04:46 +00002366#endif
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002367
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002368 switch (ic) {
Erik Andersenf0657d32000-04-12 17:49:52 +00002369 case '\n':
2370 case '\r':
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002371 vi_case('\n'|VI_CMDMODE_BIT:)
2372 vi_case('\r'|VI_CMDMODE_BIT:)
Erik Andersenf0657d32000-04-12 17:49:52 +00002373 /* Enter */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002374 goto_new_line();
Erik Andersenf0657d32000-04-12 17:49:52 +00002375 break_out = 1;
2376 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002377 case CTRL('A'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002378 vi_case('0'|VI_CMDMODE_BIT:)
Erik Andersenc7c634b2000-03-19 05:28:55 +00002379 /* Control-a -- Beginning of line */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002380 input_backward(cursor);
Mark Whitley4e338752001-01-26 20:42:23 +00002381 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002382 case CTRL('B'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002383 vi_case('h'|VI_CMDMODE_BIT:)
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002384 vi_case('\b'|VI_CMDMODE_BIT:) /* ^H */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002385 vi_case('\x7f'|VI_CMDMODE_BIT:) /* DEL */
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002386 input_backward(1); /* Move back one character */
Erik Andersenf0657d32000-04-12 17:49:52 +00002387 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002388 case CTRL('E'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002389 vi_case('$'|VI_CMDMODE_BIT:)
Erik Andersenc7c634b2000-03-19 05:28:55 +00002390 /* Control-e -- End of line */
Denys Vlasenko94043e82010-05-11 14:49:13 +02002391 put_till_end_and_adv_cursor();
Erik Andersenc7c634b2000-03-19 05:28:55 +00002392 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002393 case CTRL('F'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002394 vi_case('l'|VI_CMDMODE_BIT:)
2395 vi_case(' '|VI_CMDMODE_BIT:)
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002396 input_forward(); /* Move forward one character */
Erik Andersenc7c634b2000-03-19 05:28:55 +00002397 break;
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002398 case '\b': /* ^H */
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002399 case '\x7f': /* DEL */
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002400 if (!isrtl_str())
2401 input_backspace();
2402 else
2403 input_delete(0);
2404 break;
2405 case KEYCODE_DELETE:
2406 if (!isrtl_str())
2407 input_delete(0);
2408 else
2409 input_backspace();
Erik Andersenc7c634b2000-03-19 05:28:55 +00002410 break;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002411#if ENABLE_FEATURE_TAB_COMPLETION
Erik Andersenc7c634b2000-03-19 05:28:55 +00002412 case '\t':
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002413 input_tab(&lastWasTab);
Erik Andersenc7c634b2000-03-19 05:28:55 +00002414 break;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002415#endif
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002416 case CTRL('K'):
Eric Andersenc470f442003-07-28 09:56:35 +00002417 /* Control-k -- clear to end of line */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002418 command_ps[cursor] = BB_NUL;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002419 command_len = cursor;
Denys Vlasenko94043e82010-05-11 14:49:13 +02002420 printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
Eric Andersen65a07302002-04-13 13:26:49 +00002421 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002422 case CTRL('L'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002423 vi_case(CTRL('L')|VI_CMDMODE_BIT:)
Eric Andersen27bb7902003-12-23 20:24:51 +00002424 /* Control-l -- clear screen */
Marek Polacek7b181072010-10-28 21:34:56 +02002425 printf(ESC"[H"); /* cursor to top,left */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002426 redraw(0, command_len - cursor);
Eric Andersenf1f2bd02001-12-21 11:20:15 +00002427 break;
Denis Vlasenko9d4533e2006-11-02 22:09:37 +00002428#if MAX_HISTORY > 0
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002429 case CTRL('N'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002430 vi_case(CTRL('N')|VI_CMDMODE_BIT:)
2431 vi_case('j'|VI_CMDMODE_BIT:)
Erik Andersenf0657d32000-04-12 17:49:52 +00002432 /* Control-n -- Get next command in history */
Glenn L McGrath062c74f2002-11-27 09:29:49 +00002433 if (get_next_history())
Erik Andersenf0657d32000-04-12 17:49:52 +00002434 goto rewrite_line;
Erik Andersenf0657d32000-04-12 17:49:52 +00002435 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002436 case CTRL('P'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002437 vi_case(CTRL('P')|VI_CMDMODE_BIT:)
2438 vi_case('k'|VI_CMDMODE_BIT:)
Erik Andersenf0657d32000-04-12 17:49:52 +00002439 /* Control-p -- Get previous command from history */
Denis Vlasenko682ad302008-09-27 01:28:56 +00002440 if (get_previous_history())
Erik Andersenf0657d32000-04-12 17:49:52 +00002441 goto rewrite_line;
Erik Andersenc7c634b2000-03-19 05:28:55 +00002442 break;
Glenn L McGrath062c74f2002-11-27 09:29:49 +00002443#endif
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002444 case CTRL('U'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002445 vi_case(CTRL('U')|VI_CMDMODE_BIT:)
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002446 /* Control-U -- Clear line before cursor */
2447 if (cursor) {
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002448 command_len -= cursor;
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002449 memmove(command_ps, command_ps + cursor,
2450 (command_len + 1) * sizeof(command_ps[0]));
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002451 redraw(cmdedit_y, command_len);
Erik Andersenc7c634b2000-03-19 05:28:55 +00002452 }
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002453 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002454 case CTRL('W'):
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002455 vi_case(CTRL('W')|VI_CMDMODE_BIT:)
Eric Andersen27bb7902003-12-23 20:24:51 +00002456 /* Control-W -- Remove the last word */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002457 while (cursor > 0 && BB_isspace(command_ps[cursor-1]))
Eric Andersen27bb7902003-12-23 20:24:51 +00002458 input_backspace();
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002459 while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
Eric Andersen27bb7902003-12-23 20:24:51 +00002460 input_backspace();
2461 break;
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002462#if ENABLE_FEATURE_REVERSE_SEARCH
2463 case CTRL('R'):
2464 ic = ic_raw = reverse_i_search();
2465 goto again;
2466#endif
Denis Vlasenko00cdbd82007-01-21 19:21:21 +00002467
Denis Vlasenko38f63192007-01-22 09:03:07 +00002468#if ENABLE_FEATURE_EDITING_VI
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002469 case 'i'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002470 vi_cmdmode = 0;
2471 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002472 case 'I'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002473 input_backward(cursor);
2474 vi_cmdmode = 0;
2475 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002476 case 'a'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002477 input_forward();
2478 vi_cmdmode = 0;
2479 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002480 case 'A'|VI_CMDMODE_BIT:
Denys Vlasenko94043e82010-05-11 14:49:13 +02002481 put_till_end_and_adv_cursor();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002482 vi_cmdmode = 0;
2483 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002484 case 'x'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002485 input_delete(1);
2486 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002487 case 'X'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002488 if (cursor > 0) {
2489 input_backward(1);
2490 input_delete(1);
2491 }
2492 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002493 case 'W'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002494 vi_Word_motion(1);
Paul Fox3f11b1b2005-08-04 19:04:46 +00002495 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002496 case 'w'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002497 vi_word_motion(1);
Paul Fox3f11b1b2005-08-04 19:04:46 +00002498 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002499 case 'E'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002500 vi_End_motion();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002501 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002502 case 'e'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002503 vi_end_motion();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002504 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002505 case 'B'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002506 vi_Back_motion();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002507 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002508 case 'b'|VI_CMDMODE_BIT:
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002509 vi_back_motion();
Paul Fox3f11b1b2005-08-04 19:04:46 +00002510 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002511 case 'C'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002512 vi_cmdmode = 0;
2513 /* fall through */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002514 case 'D'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002515 goto clear_to_eol;
2516
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002517 case 'c'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002518 vi_cmdmode = 0;
2519 /* fall through */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002520 case 'd'|VI_CMDMODE_BIT: {
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002521 int nc, sc;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002522
Denys Vlasenko66c5b122011-02-08 05:07:02 +01002523 ic = lineedit_read_key(read_key_buffer, timeout);
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002524 if (errno) /* error */
Denys Vlasenkod55f5992010-09-07 18:40:53 +02002525 goto return_error_indicator;
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002526 if (ic == ic_raw) { /* "cc", "dd" */
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002527 input_backward(cursor);
2528 goto clear_to_eol;
2529 break;
2530 }
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002531
2532 sc = cursor;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002533 switch (ic) {
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002534 case 'w':
2535 case 'W':
2536 case 'e':
2537 case 'E':
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002538 switch (ic) {
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002539 case 'w': /* "dw", "cw" */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002540 vi_word_motion(vi_cmdmode);
Denis Vlasenko92758142006-10-03 19:56:34 +00002541 break;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002542 case 'W': /* 'dW', 'cW' */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002543 vi_Word_motion(vi_cmdmode);
Denis Vlasenko92758142006-10-03 19:56:34 +00002544 break;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002545 case 'e': /* 'de', 'ce' */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002546 vi_end_motion();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002547 input_forward();
Denis Vlasenko92758142006-10-03 19:56:34 +00002548 break;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002549 case 'E': /* 'dE', 'cE' */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002550 vi_End_motion();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002551 input_forward();
Denis Vlasenko92758142006-10-03 19:56:34 +00002552 break;
2553 }
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002554 nc = cursor;
2555 input_backward(cursor - sc);
2556 while (nc-- > cursor)
2557 input_delete(1);
2558 break;
2559 case 'b': /* "db", "cb" */
2560 case 'B': /* implemented as B */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002561 if (ic == 'b')
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002562 vi_back_motion();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002563 else
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002564 vi_Back_motion();
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002565 while (sc-- > cursor)
2566 input_delete(1);
2567 break;
2568 case ' ': /* "d ", "c " */
2569 input_delete(1);
2570 break;
2571 case '$': /* "d$", "c$" */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002572 clear_to_eol:
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002573 while (cursor < command_len)
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002574 input_delete(1);
2575 break;
Paul Fox3f11b1b2005-08-04 19:04:46 +00002576 }
2577 break;
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002578 }
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002579 case 'p'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002580 input_forward();
2581 /* fallthrough */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002582 case 'P'|VI_CMDMODE_BIT:
Paul Fox3f11b1b2005-08-04 19:04:46 +00002583 put();
2584 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002585 case 'r'|VI_CMDMODE_BIT:
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002586//FIXME: unicode case?
Denys Vlasenko66c5b122011-02-08 05:07:02 +01002587 ic = lineedit_read_key(read_key_buffer, timeout);
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002588 if (errno) /* error */
Denys Vlasenkod55f5992010-09-07 18:40:53 +02002589 goto return_error_indicator;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002590 if (ic < ' ' || ic > 255) {
Paul Fox3f11b1b2005-08-04 19:04:46 +00002591 beep();
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002592 } else {
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002593 command_ps[cursor] = ic;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002594 bb_putchar(ic);
Denis Vlasenko4daad902007-09-27 10:20:47 +00002595 bb_putchar('\b');
Paul Fox3f11b1b2005-08-04 19:04:46 +00002596 }
2597 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002598 case '\x1b': /* ESC */
2599 if (state->flags & VI_MODE) {
2600 /* insert mode --> command mode */
2601 vi_cmdmode = 1;
2602 input_backward(1);
2603 }
Denys Vlasenko9ce09bc2011-11-03 13:28:22 +01002604 /* Handle a few ESC-<key> combinations the same way
2605 * standard readline bindings (IOW: bash) do.
2606 * Often, Alt-<key> generates ESC-<key>.
2607 */
2608 ic = lineedit_read_key(read_key_buffer, timeout);
2609 switch (ic) {
2610 //case KEYCODE_LEFT: - bash doesn't do this
2611 case 'b':
Denys Vlasenko56443cd2012-04-20 15:07:22 +02002612 ctrl_left();
Denys Vlasenko9ce09bc2011-11-03 13:28:22 +01002613 break;
2614 //case KEYCODE_RIGHT: - bash doesn't do this
2615 case 'f':
2616 ctrl_right();
2617 break;
2618 //case KEYCODE_DELETE: - bash doesn't do this
2619 case 'd': /* Alt-D */
2620 {
2621 /* Delete word forward */
2622 int nc, sc = cursor;
2623 ctrl_right();
Cliff Frey49195652012-08-07 17:59:40 +02002624 nc = cursor - sc;
2625 input_backward(nc);
2626 while (--nc >= 0)
Denys Vlasenko9ce09bc2011-11-03 13:28:22 +01002627 input_delete(1);
2628 break;
2629 }
2630 case '\b': /* Alt-Backspace(?) */
2631 case '\x7f': /* Alt-Backspace(?) */
2632 //case 'w': - bash doesn't do this
2633 {
2634 /* Delete word backward */
2635 int sc = cursor;
2636 ctrl_left();
2637 while (sc-- > cursor)
2638 input_delete(1);
2639 break;
2640 }
2641 }
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002642 break;
Denis Vlasenko7f1dc212006-12-19 01:10:25 +00002643#endif /* FEATURE_COMMAND_EDITING_VI */
Paul Fox0f2dd9f2006-03-07 20:26:11 +00002644
Denis Vlasenko9d4533e2006-11-02 22:09:37 +00002645#if MAX_HISTORY > 0
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002646 case KEYCODE_UP:
2647 if (get_previous_history())
2648 goto rewrite_line;
2649 beep();
2650 break;
2651 case KEYCODE_DOWN:
2652 if (!get_next_history())
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002653 break;
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002654 rewrite_line:
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002655 /* Rewrite the line with the selected history item */
2656 /* change command */
Denys Vlasenko90a99042009-09-06 02:36:23 +02002657 command_len = load_string(state->history[state->cur_history] ?
Denys Vlasenkoa669eca2011-07-11 07:36:59 +02002658 state->history[state->cur_history] : "");
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002659 /* redraw and go to eol (bol, in vi) */
2660 redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
2661 break;
Glenn L McGrath062c74f2002-11-27 09:29:49 +00002662#endif
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002663 case KEYCODE_RIGHT:
2664 input_forward();
2665 break;
2666 case KEYCODE_LEFT:
2667 input_backward(1);
2668 break;
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01002669 case KEYCODE_CTRL_LEFT:
Denys Vlasenko9ce09bc2011-11-03 13:28:22 +01002670 case KEYCODE_ALT_LEFT: /* bash doesn't do it */
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01002671 ctrl_left();
2672 break;
2673 case KEYCODE_CTRL_RIGHT:
Denys Vlasenko9ce09bc2011-11-03 13:28:22 +01002674 case KEYCODE_ALT_RIGHT: /* bash doesn't do it */
Denys Vlasenkoa17eeb82009-10-25 23:50:56 +01002675 ctrl_right();
2676 break;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002677 case KEYCODE_HOME:
2678 input_backward(cursor);
2679 break;
2680 case KEYCODE_END:
Denys Vlasenko94043e82010-05-11 14:49:13 +02002681 put_till_end_and_adv_cursor();
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002682 break;
Erik Andersenc7c634b2000-03-19 05:28:55 +00002683
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002684 default:
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002685 if (initial_settings.c_cc[VINTR] != 0
2686 && ic_raw == initial_settings.c_cc[VINTR]
2687 ) {
2688 /* Ctrl-C (usually) - stop gathering input */
2689 goto_new_line();
2690 command_len = 0;
2691 break_out = -1; /* "do not append '\n'" */
2692 break;
2693 }
2694 if (initial_settings.c_cc[VEOF] != 0
2695 && ic_raw == initial_settings.c_cc[VEOF]
2696 ) {
2697 /* Ctrl-D (usually) - delete one character,
2698 * or exit if len=0 and no chars to delete */
2699 if (command_len == 0) {
2700 errno = 0;
Denys Vlasenkod55f5992010-09-07 18:40:53 +02002701
2702 case -1: /* error (e.g. EIO when tty is destroyed) */
2703 IF_FEATURE_EDITING_VI(return_error_indicator:)
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002704 break_out = command_len = -1;
2705 break;
2706 }
2707 input_delete(0);
2708 break;
2709 }
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002710// /* Control-V -- force insert of next char */
2711// if (c == CTRL('V')) {
2712// if (safe_read(STDIN_FILENO, &c, 1) < 1)
Denys Vlasenkod55f5992010-09-07 18:40:53 +02002713// goto return_error_indicator;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002714// if (c == 0) {
2715// beep();
2716// break;
2717// }
2718// }
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002719 if (ic < ' '
Denys Vlasenko19158a82010-03-26 14:06:56 +01002720 || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
2721 || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002722 ) {
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002723 /* If VI_CMDMODE_BIT is set, ic is >= 256
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002724 * and vi mode ignores unexpected chars.
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002725 * Otherwise, we are here if ic is a
2726 * control char or an unhandled ESC sequence,
2727 * which is also ignored.
2728 */
2729 break;
2730 }
2731 if ((int)command_len >= (maxsize - 2)) {
2732 /* Not enough space for the char and EOL */
2733 break;
Paul Fox84bbac52008-01-11 16:50:08 +00002734 }
Denis Vlasenko00cdbd82007-01-21 19:21:21 +00002735
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002736 command_len++;
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002737 if (cursor == (command_len - 1)) {
2738 /* We are at the end, append */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002739 command_ps[cursor] = ic;
2740 command_ps[cursor + 1] = BB_NUL;
Denys Vlasenko94043e82010-05-11 14:49:13 +02002741 put_cur_glyph_and_inc_cursor();
Tomas Heinrichaa167552010-03-26 13:13:24 +01002742 if (unicode_bidi_isrtl(ic))
Tomas Heinrichc5c006c2010-03-18 18:35:37 +01002743 input_backward(1);
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002744 } else {
2745 /* In the middle, insert */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002746 int sc = cursor;
Erik Andersenc7c634b2000-03-19 05:28:55 +00002747
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002748 memmove(command_ps + sc + 1, command_ps + sc,
2749 (command_len - sc) * sizeof(command_ps[0]));
2750 command_ps[sc] = ic;
Tomas Heinrichaa167552010-03-26 13:13:24 +01002751 /* is right-to-left char, or neutral one (e.g. comma) was just added to rtl text? */
2752 if (!isrtl_str())
2753 sc++; /* no */
Denys Vlasenko94043e82010-05-11 14:49:13 +02002754 put_till_end_and_adv_cursor();
Mark Whitley4e338752001-01-26 20:42:23 +00002755 /* to prev x pos + 1 */
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002756 input_backward(cursor - sc);
Erik Andersenc7c634b2000-03-19 05:28:55 +00002757 }
Erik Andersenc7c634b2000-03-19 05:28:55 +00002758 break;
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002759 } /* switch (ic) */
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002760
2761 if (break_out)
Erik Andersenc7c634b2000-03-19 05:28:55 +00002762 break;
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002763
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002764#if ENABLE_FEATURE_TAB_COMPLETION
Denys Vlasenko04bb6b62009-10-14 12:53:04 +02002765 if (ic_raw != '\t')
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02002766 lastWasTab = 0;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002767#endif
Denys Vlasenkoc15f40c2009-05-15 03:27:53 +02002768 } /* while (1) */
Erik Andersenc7c634b2000-03-19 05:28:55 +00002769
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002770#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
Denys Vlasenkod83bbf42009-10-27 10:47:49 +01002771 if (S.sent_ESC_br6n) {
Denys Vlasenkoeb62d7c2009-10-27 10:34:06 +01002772 /* "sleep 1; busybox ash" + hold [Enter] to trigger.
2773 * We sent "ESC [ 6 n", but got '\n' first, and
2774 * KEYCODE_CURSOR_POS response is now buffered from terminal.
2775 * It's bad already and not much can be done with it
2776 * (it _will_ be visible for the next process to read stdin),
2777 * but without this delay it even shows up on the screen
2778 * as garbage because we restore echo settings with tcsetattr
2779 * before it comes in. UGLY!
2780 */
2781 usleep(20*1000);
2782 }
2783#endif
2784
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02002785/* End of bug-catching "command_must_not_be_used" trick */
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002786#undef command
2787
Denys Vlasenko19158a82010-03-26 14:06:56 +01002788#if ENABLE_UNICODE_SUPPORT
Denys Vlasenko2f3f09c2009-09-29 00:00:12 +02002789 command[0] = '\0';
2790 if (command_len > 0)
2791 command_len = save_string(command, maxsize - 1);
Denys Vlasenko2e6d4ef2009-07-10 18:40:49 +02002792 free(command_ps);
2793#endif
2794
Flemming Madsend96ffda2013-04-07 18:47:24 +02002795 if (command_len > 0) {
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002796 remember_in_history(command);
Flemming Madsend96ffda2013-04-07 18:47:24 +02002797 }
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002798
Eric Andersen27bb7902003-12-23 20:24:51 +00002799 if (break_out > 0) {
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002800 command[command_len++] = '\n';
2801 command[command_len] = '\0';
Eric Andersen044228d2001-07-17 01:12:36 +00002802 }
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002803
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002804#if ENABLE_FEATURE_TAB_COMPLETION
Denis Vlasenko5592fac2007-01-21 19:19:46 +00002805 free_tab_completion_data();
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002806#endif
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002807
Denis Vlasenko6258fd32007-01-22 07:30:26 +00002808 /* restore initial_settings */
Denis Vlasenko202ac502008-11-05 13:20:58 +00002809 tcsetattr_stdin_TCSANOW(&initial_settings);
Denis Vlasenko6258fd32007-01-22 07:30:26 +00002810 /* restore SIGWINCH handler */
2811 signal(SIGWINCH, previous_SIGWINCH_handler);
Denys Vlasenko8131eea2009-11-02 14:19:51 +01002812 fflush_all();
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002813
Denis Vlasenkof31c3b62008-08-20 00:46:32 +00002814 len = command_len;
Denis Vlasenko73cb1fd2007-11-10 01:35:47 +00002815 DEINIT_S();
2816
Denis Vlasenkof31c3b62008-08-20 00:46:32 +00002817 return len; /* can't return command_len, DEINIT_S() destroys it */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002818}
2819
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02002820#else /* !FEATURE_EDITING */
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002821
2822#undef read_line_input
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +00002823int FAST_FUNC read_line_input(const char* prompt, char* command, int maxsize)
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002824{
2825 fputs(prompt, stdout);
Denys Vlasenko8131eea2009-11-02 14:19:51 +01002826 fflush_all();
Denys Vlasenkob2320372012-09-27 16:03:49 +02002827 if (!fgets(command, maxsize, stdin))
2828 return -1;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002829 return strlen(command);
Eric Andersen501c88b2000-07-28 15:14:45 +00002830}
2831
Denys Vlasenkob9e35dc2010-07-18 22:21:24 +02002832#endif /* !FEATURE_EDITING */
Eric Andersen501c88b2000-07-28 15:14:45 +00002833
2834
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002835/*
2836 * Testing
2837 */
2838
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002839#ifdef TEST
2840
Eric Andersenf9ff8a72001-03-15 20:51:09 +00002841#include <locale.h>
Denis Vlasenko82b39e82007-01-21 19:18:19 +00002842
2843const char *applet_name = "debug stuff usage";
Eric Andersenf9ff8a72001-03-15 20:51:09 +00002844
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002845int main(int argc, char **argv)
2846{
Denis Vlasenkoe8a07882007-06-10 15:08:44 +00002847 char buff[MAX_LINELEN];
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002848 char *prompt =
Denis Vlasenko38f63192007-01-22 09:03:07 +00002849#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002850 "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
2851 "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
2852 "\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002853#else
2854 "% ";
2855#endif
2856
Denis Vlasenko7f1dc212006-12-19 01:10:25 +00002857 while (1) {
Eric Andersenb3d6e2d2001-03-13 22:57:56 +00002858 int l;
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002859 l = read_line_input(prompt, buff);
Denis Vlasenko0a8a7742006-12-21 22:27:10 +00002860 if (l <= 0 || buff[l-1] != '\n')
Eric Andersen27bb7902003-12-23 20:24:51 +00002861 break;
Denys Vlasenko57ea9b42010-09-03 12:51:36 +02002862 buff[l-1] = '\0';
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002863 printf("*** read_line_input() returned line =%s=\n", buff);
Eric Andersen7467c8d2001-07-12 20:26:32 +00002864 }
Denis Vlasenko8e1c7152007-01-22 07:21:38 +00002865 printf("*** read_line_input() detect ^D\n");
Eric Andersen5f2c79d2001-02-16 18:36:04 +00002866 return 0;
2867}
2868
Eric Andersenc470f442003-07-28 09:56:35 +00002869#endif /* TEST */