mirror of
https://github.com/sheumann/hush.git
synced 2024-08-30 22:29:40 +00:00
Based on patch from Alexey Fomenko (ext-alexey.fomenko AT nokia.com) function old new delta size_from_HISTFILESIZE - 44 +44 hush_main 998 1025 +27 ash_main 1348 1374 +26 read_line_input 3361 3372 +11 new_line_input_t 17 24 +7 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2531 lines
61 KiB
C
2531 lines
61 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Command line editing.
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*
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* Copyright (c) 1986-2003 may safely be consumed by a BSD or GPL license.
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* Written by: Vladimir Oleynik <dzo@simtreas.ru>
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*
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* Used ideas:
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* Adam Rogoyski <rogoyski@cs.utexas.edu>
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* Dave Cinege <dcinege@psychosis.com>
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* Jakub Jelinek (c) 1995
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* Erik Andersen <andersen@codepoet.org> (Majorly adjusted for busybox)
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*
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* This code is 'as is' with no warranty.
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*/
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/*
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* Usage and known bugs:
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* Terminal key codes are not extensive, more needs to be added.
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* This version was created on Debian GNU/Linux 2.x.
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* Delete, Backspace, Home, End, and the arrow keys were tested
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* to work in an Xterm and console. Ctrl-A also works as Home.
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* Ctrl-E also works as End.
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*
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* The following readline-like commands are not implemented:
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* ESC-b -- Move back one word
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* ESC-f -- Move forward one word
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* ESC-d -- Delete forward one word
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* CTL-t -- Transpose two characters
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*
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* lineedit does not know that the terminal escape sequences do not
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* take up space on the screen. The redisplay code assumes, unless
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* told otherwise, that each character in the prompt is a printable
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* character that takes up one character position on the screen.
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* You need to tell lineedit that some sequences of characters
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* in the prompt take up no screen space. Compatibly with readline,
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* use the \[ escape to begin a sequence of non-printing characters,
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* and the \] escape to signal the end of such a sequence. Example:
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*
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* PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
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*/
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#include "libbb.h"
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#include "unicode.h"
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#ifdef TEST
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# define ENABLE_FEATURE_EDITING 0
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# define ENABLE_FEATURE_TAB_COMPLETION 0
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# define ENABLE_FEATURE_USERNAME_COMPLETION 0
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#endif
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/* Entire file (except TESTing part) sits inside this #if */
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#if ENABLE_FEATURE_EDITING
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#define ENABLE_USERNAME_OR_HOMEDIR \
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(ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
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#define IF_USERNAME_OR_HOMEDIR(...)
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#if ENABLE_USERNAME_OR_HOMEDIR
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# undef IF_USERNAME_OR_HOMEDIR
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# define IF_USERNAME_OR_HOMEDIR(...) __VA_ARGS__
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#endif
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#undef CHAR_T
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#if ENABLE_UNICODE_SUPPORT
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# define BB_NUL ((wchar_t)0)
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# define CHAR_T wchar_t
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static bool BB_isspace(CHAR_T c) { return ((unsigned)c < 256 && isspace(c)); }
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# if ENABLE_FEATURE_EDITING_VI
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static bool BB_isalnum(CHAR_T c) { return ((unsigned)c < 256 && isalnum(c)); }
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# endif
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static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); }
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# undef isspace
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# undef isalnum
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# undef ispunct
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# undef isprint
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# define isspace isspace_must_not_be_used
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# define isalnum isalnum_must_not_be_used
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# define ispunct ispunct_must_not_be_used
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# define isprint isprint_must_not_be_used
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#else
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# define BB_NUL '\0'
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# define CHAR_T char
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# define BB_isspace(c) isspace(c)
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# define BB_isalnum(c) isalnum(c)
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# define BB_ispunct(c) ispunct(c)
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#endif
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#if ENABLE_UNICODE_PRESERVE_BROKEN
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# define unicode_mark_raw_byte(wc) ((wc) | 0x20000000)
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# define unicode_is_raw_byte(wc) ((wc) & 0x20000000)
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#else
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# define unicode_is_raw_byte(wc) 0
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#endif
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#define ESC "\033"
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#define SEQ_CLEAR_TILL_END_OF_SCREEN ESC"[J"
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//#define SEQ_CLEAR_TILL_END_OF_LINE ESC"[K"
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enum {
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MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0
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? CONFIG_FEATURE_EDITING_MAX_LEN
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: 0x7ff0
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};
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#if ENABLE_USERNAME_OR_HOMEDIR
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static const char null_str[] ALIGN1 = "";
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#endif
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/* We try to minimize both static and stack usage. */
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struct lineedit_statics {
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line_input_t *state;
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volatile unsigned cmdedit_termw; /* = 80; */ /* actual terminal width */
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sighandler_t previous_SIGWINCH_handler;
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unsigned cmdedit_x; /* real x (col) terminal position */
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unsigned cmdedit_y; /* pseudoreal y (row) terminal position */
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unsigned cmdedit_prmt_len; /* length of prompt (without colors etc) */
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unsigned cursor;
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int command_len; /* must be signed */
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/* signed maxsize: we want x in "if (x > S.maxsize)"
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* to _not_ be promoted to unsigned */
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int maxsize;
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CHAR_T *command_ps;
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const char *cmdedit_prompt;
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#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
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int num_ok_lines; /* = 1; */
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#endif
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#if ENABLE_USERNAME_OR_HOMEDIR
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char *user_buf;
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char *home_pwd_buf; /* = (char*)null_str; */
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#endif
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#if ENABLE_FEATURE_TAB_COMPLETION
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char **matches;
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unsigned num_matches;
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#endif
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#if ENABLE_FEATURE_EDITING_VI
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# define DELBUFSIZ 128
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CHAR_T *delptr;
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smallint newdelflag; /* whether delbuf should be reused yet */
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CHAR_T delbuf[DELBUFSIZ]; /* a place to store deleted characters */
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#endif
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#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
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smallint sent_ESC_br6n;
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#endif
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};
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/* See lineedit_ptr_hack.c */
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extern struct lineedit_statics *const lineedit_ptr_to_statics;
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#define S (*lineedit_ptr_to_statics)
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#define state (S.state )
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#define cmdedit_termw (S.cmdedit_termw )
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#define previous_SIGWINCH_handler (S.previous_SIGWINCH_handler)
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#define cmdedit_x (S.cmdedit_x )
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#define cmdedit_y (S.cmdedit_y )
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#define cmdedit_prmt_len (S.cmdedit_prmt_len)
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#define cursor (S.cursor )
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#define command_len (S.command_len )
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#define command_ps (S.command_ps )
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#define cmdedit_prompt (S.cmdedit_prompt )
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#define num_ok_lines (S.num_ok_lines )
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#define user_buf (S.user_buf )
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#define home_pwd_buf (S.home_pwd_buf )
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#define matches (S.matches )
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#define num_matches (S.num_matches )
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#define delptr (S.delptr )
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#define newdelflag (S.newdelflag )
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#define delbuf (S.delbuf )
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#define INIT_S() do { \
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(*(struct lineedit_statics**)&lineedit_ptr_to_statics) = xzalloc(sizeof(S)); \
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barrier(); \
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cmdedit_termw = 80; \
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IF_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines = 1;) \
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IF_USERNAME_OR_HOMEDIR(home_pwd_buf = (char*)null_str;) \
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} while (0)
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static void deinit_S(void)
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{
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#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
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/* This one is allocated only if FANCY_PROMPT is on
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* (otherwise it points to verbatim prompt (NOT malloced)) */
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free((char*)cmdedit_prompt);
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#endif
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#if ENABLE_USERNAME_OR_HOMEDIR
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free(user_buf);
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if (home_pwd_buf != null_str)
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free(home_pwd_buf);
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#endif
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free(lineedit_ptr_to_statics);
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}
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#define DEINIT_S() deinit_S()
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#if ENABLE_UNICODE_SUPPORT
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static size_t load_string(const char *src, int maxsize)
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{
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if (unicode_status == UNICODE_ON) {
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ssize_t len = mbstowcs(command_ps, src, maxsize - 1);
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if (len < 0)
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len = 0;
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command_ps[len] = BB_NUL;
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return len;
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} else {
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unsigned i = 0;
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while ((command_ps[i] = src[i]) != 0)
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i++;
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return i;
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}
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}
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static unsigned save_string(char *dst, unsigned maxsize)
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{
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if (unicode_status == UNICODE_ON) {
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# if !ENABLE_UNICODE_PRESERVE_BROKEN
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ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
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if (len < 0)
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len = 0;
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dst[len] = '\0';
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return len;
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# else
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unsigned dstpos = 0;
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unsigned srcpos = 0;
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maxsize--;
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while (dstpos < maxsize) {
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wchar_t wc;
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int n = srcpos;
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/* Convert up to 1st invalid byte (or up to end) */
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while ((wc = command_ps[srcpos]) != BB_NUL
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&& !unicode_is_raw_byte(wc)
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) {
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srcpos++;
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}
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command_ps[srcpos] = BB_NUL;
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n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos);
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if (n < 0) /* should not happen */
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break;
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dstpos += n;
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if (wc == BB_NUL) /* usually is */
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break;
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/* We do have invalid byte here! */
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command_ps[srcpos] = wc; /* restore it */
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srcpos++;
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if (dstpos == maxsize)
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break;
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dst[dstpos++] = (char) wc;
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}
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dst[dstpos] = '\0';
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return dstpos;
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# endif
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} else {
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unsigned i = 0;
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while ((dst[i] = command_ps[i]) != 0)
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i++;
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return i;
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}
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}
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/* I thought just fputwc(c, stdout) would work. But no... */
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static void BB_PUTCHAR(wchar_t c)
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{
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if (unicode_status == UNICODE_ON) {
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char buf[MB_CUR_MAX + 1];
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mbstate_t mbst = { 0 };
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ssize_t len = wcrtomb(buf, c, &mbst);
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if (len > 0) {
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buf[len] = '\0';
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fputs(buf, stdout);
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}
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} else {
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/* In this case, c is always one byte */
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putchar(c);
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}
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}
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# if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
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static wchar_t adjust_width_and_validate_wc(unsigned *width_adj, wchar_t wc)
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# else
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static wchar_t adjust_width_and_validate_wc(wchar_t wc)
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# define adjust_width_and_validate_wc(width_adj, wc) \
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((*(width_adj))++, adjust_width_and_validate_wc(wc))
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# endif
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{
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int w = 1;
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if (unicode_status == UNICODE_ON) {
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if (wc > CONFIG_LAST_SUPPORTED_WCHAR) {
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/* note: also true for unicode_is_raw_byte(wc) */
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goto subst;
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}
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w = wcwidth(wc);
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if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0)
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|| (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0)
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|| (!ENABLE_UNICODE_WIDE_WCHARS && w > 1)
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) {
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subst:
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w = 1;
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wc = CONFIG_SUBST_WCHAR;
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}
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}
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# if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
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*width_adj += w;
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#endif
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return wc;
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}
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#else /* !UNICODE */
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static size_t load_string(const char *src, int maxsize)
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{
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safe_strncpy(command_ps, src, maxsize);
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return strlen(command_ps);
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}
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# if ENABLE_FEATURE_TAB_COMPLETION
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static void save_string(char *dst, unsigned maxsize)
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{
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safe_strncpy(dst, command_ps, maxsize);
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}
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# endif
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# define BB_PUTCHAR(c) bb_putchar(c)
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/* Should never be called: */
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int adjust_width_and_validate_wc(unsigned *width_adj, int wc);
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#endif
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/* Put 'command_ps[cursor]', cursor++.
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* Advance cursor on screen. If we reached right margin, scroll text up
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* and remove terminal margin effect by printing 'next_char' */
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#define HACK_FOR_WRONG_WIDTH 1
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static void put_cur_glyph_and_inc_cursor(void)
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{
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CHAR_T c = command_ps[cursor];
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unsigned width = 0;
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int ofs_to_right;
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if (c == BB_NUL) {
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/* erase character after end of input string */
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c = ' ';
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} else {
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/* advance cursor only if we aren't at the end yet */
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cursor++;
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if (unicode_status == UNICODE_ON) {
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IF_UNICODE_WIDE_WCHARS(width = cmdedit_x;)
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c = adjust_width_and_validate_wc(&cmdedit_x, c);
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IF_UNICODE_WIDE_WCHARS(width = cmdedit_x - width;)
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} else {
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cmdedit_x++;
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}
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}
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ofs_to_right = cmdedit_x - cmdedit_termw;
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if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right <= 0) {
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/* c fits on this line */
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BB_PUTCHAR(c);
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}
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if (ofs_to_right >= 0) {
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/* we go to the next line */
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#if HACK_FOR_WRONG_WIDTH
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/* This works better if our idea of term width is wrong
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* and it is actually wider (often happens on serial lines).
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* Printing CR,LF *forces* cursor to next line.
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* OTOH if terminal width is correct AND terminal does NOT
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* have automargin (IOW: it is moving cursor to next line
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* by itself (which is wrong for VT-10x terminals)),
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* this will break things: there will be one extra empty line */
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puts("\r"); /* + implicit '\n' */
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#else
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/* VT-10x terminals don't wrap cursor to next line when last char
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* on the line is printed - cursor stays "over" this char.
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* Need to print _next_ char too (first one to appear on next line)
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* to make cursor move down to next line.
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*/
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/* Works ok only if cmdedit_termw is correct. */
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c = command_ps[cursor];
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if (c == BB_NUL)
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c = ' ';
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BB_PUTCHAR(c);
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bb_putchar('\b');
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#endif
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cmdedit_y++;
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if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right == 0) {
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width = 0;
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} else { /* ofs_to_right > 0 */
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/* wide char c didn't fit on prev line */
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BB_PUTCHAR(c);
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}
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cmdedit_x = width;
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}
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}
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|
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/* Move to end of line (by printing all chars till the end) */
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static void put_till_end_and_adv_cursor(void)
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{
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while (cursor < command_len)
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put_cur_glyph_and_inc_cursor();
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}
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|
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/* Go to the next line */
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static void goto_new_line(void)
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{
|
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put_till_end_and_adv_cursor();
|
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if (cmdedit_x != 0)
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bb_putchar('\n');
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}
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|
|
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static void beep(void)
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{
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bb_putchar('\007');
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|
}
|
|
|
|
static void put_prompt(void)
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{
|
|
unsigned w;
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|
|
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fputs(cmdedit_prompt, stdout);
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fflush_all();
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cursor = 0;
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w = cmdedit_termw; /* read volatile var once */
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cmdedit_y = cmdedit_prmt_len / w; /* new quasireal y */
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cmdedit_x = cmdedit_prmt_len % w;
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}
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|
|
/* Move back one character */
|
|
/* (optimized for slow terminals) */
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|
static void input_backward(unsigned num)
|
|
{
|
|
if (num > cursor)
|
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num = cursor;
|
|
if (num == 0)
|
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return;
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cursor -= num;
|
|
|
|
if ((ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS)
|
|
&& unicode_status == UNICODE_ON
|
|
) {
|
|
/* correct NUM to be equal to _screen_ width */
|
|
int n = num;
|
|
num = 0;
|
|
while (--n >= 0)
|
|
adjust_width_and_validate_wc(&num, command_ps[cursor + n]);
|
|
if (num == 0)
|
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return;
|
|
}
|
|
|
|
if (cmdedit_x >= num) {
|
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cmdedit_x -= num;
|
|
if (num <= 4) {
|
|
/* This is longer by 5 bytes on x86.
|
|
* Also gets miscompiled for ARM users
|
|
* (busybox.net/bugs/view.php?id=2274).
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|
* printf(("\b\b\b\b" + 4) - num);
|
|
* return;
|
|
*/
|
|
do {
|
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bb_putchar('\b');
|
|
} while (--num);
|
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return;
|
|
}
|
|
printf(ESC"[%uD", num);
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|
return;
|
|
}
|
|
|
|
/* Need to go one or more lines up */
|
|
if (ENABLE_UNICODE_WIDE_WCHARS) {
|
|
/* With wide chars, it is hard to "backtrack"
|
|
* and reliably figure out where to put cursor.
|
|
* Example (<> is a wide char; # is an ordinary char, _ cursor):
|
|
* |prompt: <><> |
|
|
* |<><><><><><> |
|
|
* |_ |
|
|
* and user presses left arrow. num = 1, cmdedit_x = 0,
|
|
* We need to go up one line, and then - how do we know that
|
|
* we need to go *10* positions to the right? Because
|
|
* |prompt: <>#<>|
|
|
* |<><><>#<><><>|
|
|
* |_ |
|
|
* in this situation we need to go *11* positions to the right.
|
|
*
|
|
* A simpler thing to do is to redraw everything from the start
|
|
* up to new cursor position (which is already known):
|
|
*/
|
|
unsigned sv_cursor;
|
|
/* go to 1st column; go up to first line */
|
|
printf("\r" ESC"[%uA", cmdedit_y);
|
|
cmdedit_y = 0;
|
|
sv_cursor = cursor;
|
|
put_prompt(); /* sets cursor to 0 */
|
|
while (cursor < sv_cursor)
|
|
put_cur_glyph_and_inc_cursor();
|
|
} else {
|
|
int lines_up;
|
|
unsigned width;
|
|
/* num = chars to go back from the beginning of current line: */
|
|
num -= cmdedit_x;
|
|
width = cmdedit_termw; /* read volatile var once */
|
|
/* num=1...w: one line up, w+1...2w: two, etc: */
|
|
lines_up = 1 + (num - 1) / width;
|
|
cmdedit_x = (width * cmdedit_y - num) % width;
|
|
cmdedit_y -= lines_up;
|
|
/* go to 1st column; go up */
|
|
printf("\r" ESC"[%uA", lines_up);
|
|
/* go to correct column.
|
|
* xterm, konsole, Linux VT interpret 0 as 1 below! wow.
|
|
* need to *make sure* we skip it if cmdedit_x == 0 */
|
|
if (cmdedit_x)
|
|
printf(ESC"[%uC", cmdedit_x);
|
|
}
|
|
}
|
|
|
|
/* draw prompt, editor line, and clear tail */
|
|
static void redraw(int y, int back_cursor)
|
|
{
|
|
if (y > 0) /* up y lines */
|
|
printf(ESC"[%uA", y);
|
|
bb_putchar('\r');
|
|
put_prompt();
|
|
put_till_end_and_adv_cursor();
|
|
printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
|
|
input_backward(back_cursor);
|
|
}
|
|
|
|
/* Delete the char in front of the cursor, optionally saving it
|
|
* for later putback */
|
|
#if !ENABLE_FEATURE_EDITING_VI
|
|
static void input_delete(void)
|
|
#define input_delete(save) input_delete()
|
|
#else
|
|
static void input_delete(int save)
|
|
#endif
|
|
{
|
|
int j = cursor;
|
|
|
|
if (j == (int)command_len)
|
|
return;
|
|
|
|
#if ENABLE_FEATURE_EDITING_VI
|
|
if (save) {
|
|
if (newdelflag) {
|
|
delptr = delbuf;
|
|
newdelflag = 0;
|
|
}
|
|
if ((delptr - delbuf) < DELBUFSIZ)
|
|
*delptr++ = command_ps[j];
|
|
}
|
|
#endif
|
|
|
|
memmove(command_ps + j, command_ps + j + 1,
|
|
/* (command_len + 1 [because of NUL]) - (j + 1)
|
|
* simplified into (command_len - j) */
|
|
(command_len - j) * sizeof(command_ps[0]));
|
|
command_len--;
|
|
put_till_end_and_adv_cursor();
|
|
/* Last char is still visible, erase it (and more) */
|
|
printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
|
|
input_backward(cursor - j); /* back to old pos cursor */
|
|
}
|
|
|
|
#if ENABLE_FEATURE_EDITING_VI
|
|
static void put(void)
|
|
{
|
|
int ocursor;
|
|
int j = delptr - delbuf;
|
|
|
|
if (j == 0)
|
|
return;
|
|
ocursor = cursor;
|
|
/* open hole and then fill it */
|
|
memmove(command_ps + cursor + j, command_ps + cursor,
|
|
(command_len - cursor + 1) * sizeof(command_ps[0]));
|
|
memcpy(command_ps + cursor, delbuf, j * sizeof(command_ps[0]));
|
|
command_len += j;
|
|
put_till_end_and_adv_cursor();
|
|
input_backward(cursor - ocursor - j + 1); /* at end of new text */
|
|
}
|
|
#endif
|
|
|
|
/* Delete the char in back of the cursor */
|
|
static void input_backspace(void)
|
|
{
|
|
if (cursor > 0) {
|
|
input_backward(1);
|
|
input_delete(0);
|
|
}
|
|
}
|
|
|
|
/* Move forward one character */
|
|
static void input_forward(void)
|
|
{
|
|
if (cursor < command_len)
|
|
put_cur_glyph_and_inc_cursor();
|
|
}
|
|
|
|
#if ENABLE_FEATURE_TAB_COMPLETION
|
|
|
|
//FIXME:
|
|
//needs to be more clever: currently it thinks that "foo\ b<TAB>
|
|
//matches the file named "foo bar", which is untrue.
|
|
//Also, perhaps "foo b<TAB> needs to complete to "foo bar" <cursor>,
|
|
//not "foo bar <cursor>...
|
|
|
|
static void free_tab_completion_data(void)
|
|
{
|
|
if (matches) {
|
|
while (num_matches)
|
|
free(matches[--num_matches]);
|
|
free(matches);
|
|
matches = NULL;
|
|
}
|
|
}
|
|
|
|
static void add_match(char *matched)
|
|
{
|
|
matches = xrealloc_vector(matches, 4, num_matches);
|
|
matches[num_matches] = matched;
|
|
num_matches++;
|
|
}
|
|
|
|
# if ENABLE_FEATURE_USERNAME_COMPLETION
|
|
/* Replace "~user/..." with "/homedir/...".
|
|
* The parameter is malloced, free it or return it
|
|
* unchanged if no user is matched.
|
|
*/
|
|
static char *username_path_completion(char *ud)
|
|
{
|
|
struct passwd *entry;
|
|
char *tilde_name = ud;
|
|
char *home = NULL;
|
|
|
|
ud++; /* skip ~ */
|
|
if (*ud == '/') { /* "~/..." */
|
|
home = home_pwd_buf;
|
|
} else {
|
|
/* "~user/..." */
|
|
ud = strchr(ud, '/');
|
|
*ud = '\0'; /* "~user" */
|
|
entry = getpwnam(tilde_name + 1);
|
|
*ud = '/'; /* restore "~user/..." */
|
|
if (entry)
|
|
home = entry->pw_dir;
|
|
}
|
|
if (home) {
|
|
ud = concat_path_file(home, ud);
|
|
free(tilde_name);
|
|
tilde_name = ud;
|
|
}
|
|
return tilde_name;
|
|
}
|
|
|
|
/* ~use<tab> - find all users with this prefix.
|
|
* Return the length of the prefix used for matching.
|
|
*/
|
|
static NOINLINE unsigned complete_username(const char *ud)
|
|
{
|
|
/* Using _r function to avoid pulling in static buffers */
|
|
char line_buff[256];
|
|
struct passwd pwd;
|
|
struct passwd *result;
|
|
unsigned userlen;
|
|
|
|
ud++; /* skip ~ */
|
|
userlen = strlen(ud);
|
|
|
|
setpwent();
|
|
while (!getpwent_r(&pwd, line_buff, sizeof(line_buff), &result)) {
|
|
/* Null usernames should result in all users as possible completions. */
|
|
if (/*!userlen || */ strncmp(ud, pwd.pw_name, userlen) == 0) {
|
|
add_match(xasprintf("~%s/", pwd.pw_name));
|
|
}
|
|
}
|
|
endpwent();
|
|
|
|
return 1 + userlen;
|
|
}
|
|
# endif /* FEATURE_USERNAME_COMPLETION */
|
|
|
|
enum {
|
|
FIND_EXE_ONLY = 0,
|
|
FIND_DIR_ONLY = 1,
|
|
FIND_FILE_ONLY = 2,
|
|
};
|
|
|
|
static int path_parse(char ***p)
|
|
{
|
|
int npth;
|
|
const char *pth;
|
|
char *tmp;
|
|
char **res;
|
|
|
|
if (state->flags & WITH_PATH_LOOKUP)
|
|
pth = state->path_lookup;
|
|
else
|
|
pth = getenv("PATH");
|
|
|
|
/* PATH="" or PATH=":"? */
|
|
if (!pth || !pth[0] || LONE_CHAR(pth, ':'))
|
|
return 1;
|
|
|
|
tmp = (char*)pth;
|
|
npth = 1; /* path component count */
|
|
while (1) {
|
|
tmp = strchr(tmp, ':');
|
|
if (!tmp)
|
|
break;
|
|
tmp++;
|
|
if (*tmp == '\0')
|
|
break; /* :<empty> */
|
|
npth++;
|
|
}
|
|
|
|
*p = res = xmalloc(npth * sizeof(res[0]));
|
|
res[0] = tmp = xstrdup(pth);
|
|
npth = 1;
|
|
while (1) {
|
|
tmp = strchr(tmp, ':');
|
|
if (!tmp)
|
|
break;
|
|
*tmp++ = '\0'; /* ':' -> '\0' */
|
|
if (*tmp == '\0')
|
|
break; /* :<empty> */
|
|
res[npth++] = tmp;
|
|
}
|
|
return npth;
|
|
}
|
|
|
|
/* Complete command, directory or file name.
|
|
* Return the length of the prefix used for matching.
|
|
*/
|
|
static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
|
|
{
|
|
char *path1[1];
|
|
char **paths = path1;
|
|
int npaths;
|
|
int i;
|
|
unsigned pf_len;
|
|
const char *pfind;
|
|
char *dirbuf = NULL;
|
|
|
|
npaths = 1;
|
|
path1[0] = (char*)".";
|
|
|
|
pfind = strrchr(command, '/');
|
|
if (!pfind) {
|
|
if (type == FIND_EXE_ONLY)
|
|
npaths = path_parse(&paths);
|
|
pfind = command;
|
|
} else {
|
|
/* point to 'l' in "..../last_component" */
|
|
pfind++;
|
|
/* dirbuf = ".../.../.../" */
|
|
dirbuf = xstrndup(command, pfind - command);
|
|
# if ENABLE_FEATURE_USERNAME_COMPLETION
|
|
if (dirbuf[0] == '~') /* ~/... or ~user/... */
|
|
dirbuf = username_path_completion(dirbuf);
|
|
# endif
|
|
path1[0] = dirbuf;
|
|
}
|
|
pf_len = strlen(pfind);
|
|
|
|
for (i = 0; i < npaths; i++) {
|
|
DIR *dir;
|
|
struct dirent *next;
|
|
struct stat st;
|
|
char *found;
|
|
|
|
dir = opendir(paths[i]);
|
|
if (!dir)
|
|
continue; /* don't print an error */
|
|
|
|
while ((next = readdir(dir)) != NULL) {
|
|
unsigned len;
|
|
const char *name_found = next->d_name;
|
|
|
|
/* .../<tab>: bash 3.2.0 shows dotfiles, but not . and .. */
|
|
if (!pfind[0] && DOT_OR_DOTDOT(name_found))
|
|
continue;
|
|
/* match? */
|
|
if (strncmp(name_found, pfind, pf_len) != 0)
|
|
continue; /* no */
|
|
|
|
found = concat_path_file(paths[i], name_found);
|
|
/* NB: stat() first so that we see is it a directory;
|
|
* but if that fails, use lstat() so that
|
|
* we still match dangling links */
|
|
if (stat(found, &st) && lstat(found, &st))
|
|
goto cont; /* hmm, remove in progress? */
|
|
|
|
/* Save only name */
|
|
len = strlen(name_found);
|
|
found = xrealloc(found, len + 2); /* +2: for slash and NUL */
|
|
strcpy(found, name_found);
|
|
|
|
if (S_ISDIR(st.st_mode)) {
|
|
/* name is a directory, add slash */
|
|
found[len] = '/';
|
|
found[len + 1] = '\0';
|
|
} else {
|
|
/* skip files if looking for dirs only (example: cd) */
|
|
if (type == FIND_DIR_ONLY)
|
|
goto cont;
|
|
}
|
|
/* add it to the list */
|
|
add_match(found);
|
|
continue;
|
|
cont:
|
|
free(found);
|
|
}
|
|
closedir(dir);
|
|
} /* for every path */
|
|
|
|
if (paths != path1) {
|
|
free(paths[0]); /* allocated memory is only in first member */
|
|
free(paths);
|
|
}
|
|
free(dirbuf);
|
|
|
|
return pf_len;
|
|
}
|
|
|
|
/* build_match_prefix:
|
|
* On entry, match_buf contains everything up to cursor at the moment <tab>
|
|
* was pressed. This function looks at it, figures out what part of it
|
|
* constitutes the command/file/directory prefix to use for completion,
|
|
* and rewrites match_buf to contain only that part.
|
|
*/
|
|
#define dbg_bmp 0
|
|
/* Helpers: */
|
|
/* QUOT is used on elements of int_buf[], which are bytes,
|
|
* not Unicode chars. Therefore it works correctly even in Unicode mode.
|
|
*/
|
|
#define QUOT (UCHAR_MAX+1)
|
|
static void remove_chunk(int16_t *int_buf, int beg, int end)
|
|
{
|
|
/* beg must be <= end */
|
|
if (beg == end)
|
|
return;
|
|
|
|
while ((int_buf[beg] = int_buf[end]) != 0)
|
|
beg++, end++;
|
|
|
|
if (dbg_bmp) {
|
|
int i;
|
|
for (i = 0; int_buf[i]; i++)
|
|
bb_putchar((unsigned char)int_buf[i]);
|
|
bb_putchar('\n');
|
|
}
|
|
}
|
|
/* Caller ensures that match_buf points to a malloced buffer
|
|
* big enough to hold strlen(match_buf)*2 + 2
|
|
*/
|
|
static NOINLINE int build_match_prefix(char *match_buf)
|
|
{
|
|
int i, j;
|
|
int command_mode;
|
|
int16_t *int_buf = (int16_t*)match_buf;
|
|
|
|
if (dbg_bmp) printf("\n%s\n", match_buf);
|
|
|
|
/* Copy in reverse order, since they overlap */
|
|
i = strlen(match_buf);
|
|
do {
|
|
int_buf[i] = (unsigned char)match_buf[i];
|
|
i--;
|
|
} while (i >= 0);
|
|
|
|
/* Mark every \c as "quoted c" */
|
|
for (i = 0; int_buf[i]; i++) {
|
|
if (int_buf[i] == '\\') {
|
|
remove_chunk(int_buf, i, i + 1);
|
|
int_buf[i] |= QUOT;
|
|
}
|
|
}
|
|
/* Quote-mark "chars" and 'chars', drop delimiters */
|
|
{
|
|
int in_quote = 0;
|
|
i = 0;
|
|
while (int_buf[i]) {
|
|
int cur = int_buf[i];
|
|
if (!cur)
|
|
break;
|
|
if (cur == '\'' || cur == '"') {
|
|
if (!in_quote || (cur == in_quote)) {
|
|
in_quote ^= cur;
|
|
remove_chunk(int_buf, i, i + 1);
|
|
continue;
|
|
}
|
|
}
|
|
if (in_quote)
|
|
int_buf[i] = cur | QUOT;
|
|
i++;
|
|
}
|
|
}
|
|
|
|
/* Remove everything up to command delimiters:
|
|
* ';' ';;' '&' '|' '&&' '||',
|
|
* but careful with '>&' '<&' '>|'
|
|
*/
|
|
for (i = 0; int_buf[i]; i++) {
|
|
int cur = int_buf[i];
|
|
if (cur == ';' || cur == '&' || cur == '|') {
|
|
int prev = i ? int_buf[i - 1] : 0;
|
|
if (cur == '&' && (prev == '>' || prev == '<')) {
|
|
continue;
|
|
} else if (cur == '|' && prev == '>') {
|
|
continue;
|
|
}
|
|
remove_chunk(int_buf, 0, i + 1 + (cur == int_buf[i + 1]));
|
|
i = -1; /* back to square 1 */
|
|
}
|
|
}
|
|
/* Remove all `cmd` */
|
|
for (i = 0; int_buf[i]; i++) {
|
|
if (int_buf[i] == '`') {
|
|
for (j = i + 1; int_buf[j]; j++) {
|
|
if (int_buf[j] == '`') {
|
|
/* `cmd` should count as a word:
|
|
* `cmd` c<tab> should search for files c*,
|
|
* not commands c*. Therefore we don't drop
|
|
* `cmd` entirely, we replace it with single `.
|
|
*/
|
|
remove_chunk(int_buf, i, j);
|
|
goto next;
|
|
}
|
|
}
|
|
/* No closing ` - command mode, remove all up to ` */
|
|
remove_chunk(int_buf, 0, i + 1);
|
|
break;
|
|
next: ;
|
|
}
|
|
}
|
|
|
|
/* Remove "cmd (" and "cmd {"
|
|
* Example: "if { c<tab>"
|
|
* In this example, c should be matched as command pfx.
|
|
*/
|
|
for (i = 0; int_buf[i]; i++) {
|
|
if (int_buf[i] == '(' || int_buf[i] == '{') {
|
|
remove_chunk(int_buf, 0, i + 1);
|
|
i = -1; /* back to square 1 */
|
|
}
|
|
}
|
|
|
|
/* Remove leading unquoted spaces */
|
|
for (i = 0; int_buf[i]; i++)
|
|
if (int_buf[i] != ' ')
|
|
break;
|
|
remove_chunk(int_buf, 0, i);
|
|
|
|
/* Determine completion mode */
|
|
command_mode = FIND_EXE_ONLY;
|
|
for (i = 0; int_buf[i]; i++) {
|
|
if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
|
|
if (int_buf[i] == ' '
|
|
&& command_mode == FIND_EXE_ONLY
|
|
&& (char)int_buf[0] == 'c'
|
|
&& (char)int_buf[1] == 'd'
|
|
&& i == 2 /* -> int_buf[2] == ' ' */
|
|
) {
|
|
command_mode = FIND_DIR_ONLY;
|
|
} else {
|
|
command_mode = FIND_FILE_ONLY;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (dbg_bmp) printf("command_mode(0:exe/1:dir/2:file):%d\n", command_mode);
|
|
|
|
/* Remove everything except last word */
|
|
for (i = 0; int_buf[i]; i++) /* quasi-strlen(int_buf) */
|
|
continue;
|
|
for (--i; i >= 0; i--) {
|
|
int cur = int_buf[i];
|
|
if (cur == ' ' || cur == '<' || cur == '>' || cur == '|' || cur == '&') {
|
|
remove_chunk(int_buf, 0, i + 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Convert back to string of _chars_ */
|
|
i = 0;
|
|
while ((match_buf[i] = int_buf[i]) != '\0')
|
|
i++;
|
|
|
|
if (dbg_bmp) printf("final match_buf:'%s'\n", match_buf);
|
|
|
|
return command_mode;
|
|
}
|
|
|
|
/*
|
|
* Display by column (original idea from ls applet,
|
|
* very optimized by me [Vladimir] :)
|
|
*/
|
|
static void showfiles(void)
|
|
{
|
|
int ncols, row;
|
|
int column_width = 0;
|
|
int nfiles = num_matches;
|
|
int nrows = nfiles;
|
|
int l;
|
|
|
|
/* find the longest file name - use that as the column width */
|
|
for (row = 0; row < nrows; row++) {
|
|
l = unicode_strwidth(matches[row]);
|
|
if (column_width < l)
|
|
column_width = l;
|
|
}
|
|
column_width += 2; /* min space for columns */
|
|
ncols = cmdedit_termw / column_width;
|
|
|
|
if (ncols > 1) {
|
|
nrows /= ncols;
|
|
if (nfiles % ncols)
|
|
nrows++; /* round up fractionals */
|
|
} else {
|
|
ncols = 1;
|
|
}
|
|
for (row = 0; row < nrows; row++) {
|
|
int n = row;
|
|
int nc;
|
|
|
|
for (nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++) {
|
|
printf("%s%-*s", matches[n],
|
|
(int)(column_width - unicode_strwidth(matches[n])), ""
|
|
);
|
|
}
|
|
if (ENABLE_UNICODE_SUPPORT)
|
|
puts(printable_string(NULL, matches[n]));
|
|
else
|
|
puts(matches[n]);
|
|
}
|
|
}
|
|
|
|
static const char *is_special_char(char c)
|
|
{
|
|
return strchr(" `\"#$%^&*()=+{}[]:;'|\\<>", c);
|
|
}
|
|
|
|
static char *quote_special_chars(char *found)
|
|
{
|
|
int l = 0;
|
|
char *s = xzalloc((strlen(found) + 1) * 2);
|
|
|
|
while (*found) {
|
|
if (is_special_char(*found))
|
|
s[l++] = '\\';
|
|
s[l++] = *found++;
|
|
}
|
|
/* s[l] = '\0'; - already is */
|
|
return s;
|
|
}
|
|
|
|
/* Do TAB completion */
|
|
static NOINLINE void input_tab(smallint *lastWasTab)
|
|
{
|
|
char *chosen_match;
|
|
char *match_buf;
|
|
size_t len_found;
|
|
/* Length of string used for matching */
|
|
unsigned match_pfx_len = match_pfx_len;
|
|
int find_type;
|
|
# if ENABLE_UNICODE_SUPPORT
|
|
/* cursor pos in command converted to multibyte form */
|
|
int cursor_mb;
|
|
# endif
|
|
if (!(state->flags & TAB_COMPLETION))
|
|
return;
|
|
|
|
if (*lastWasTab) {
|
|
/* The last char was a TAB too.
|
|
* Print a list of all the available choices.
|
|
*/
|
|
if (num_matches > 0) {
|
|
/* cursor will be changed by goto_new_line() */
|
|
int sav_cursor = cursor;
|
|
goto_new_line();
|
|
showfiles();
|
|
redraw(0, command_len - sav_cursor);
|
|
}
|
|
return;
|
|
}
|
|
|
|
*lastWasTab = 1;
|
|
chosen_match = NULL;
|
|
|
|
/* Make a local copy of the string up to the position of the cursor.
|
|
* build_match_prefix will expand it into int16_t's, need to allocate
|
|
* twice as much as the string_len+1.
|
|
* (we then also (ab)use this extra space later - see (**))
|
|
*/
|
|
match_buf = xmalloc(MAX_LINELEN * sizeof(int16_t));
|
|
# if !ENABLE_UNICODE_SUPPORT
|
|
save_string(match_buf, cursor + 1); /* +1 for NUL */
|
|
# else
|
|
{
|
|
CHAR_T wc = command_ps[cursor];
|
|
command_ps[cursor] = BB_NUL;
|
|
save_string(match_buf, MAX_LINELEN);
|
|
command_ps[cursor] = wc;
|
|
cursor_mb = strlen(match_buf);
|
|
}
|
|
# endif
|
|
find_type = build_match_prefix(match_buf);
|
|
|
|
/* Free up any memory already allocated */
|
|
free_tab_completion_data();
|
|
|
|
# if ENABLE_FEATURE_USERNAME_COMPLETION
|
|
/* If the word starts with ~ and there is no slash in the word,
|
|
* then try completing this word as a username. */
|
|
if (state->flags & USERNAME_COMPLETION)
|
|
if (match_buf[0] == '~' && strchr(match_buf, '/') == NULL)
|
|
match_pfx_len = complete_username(match_buf);
|
|
# endif
|
|
/* If complete_username() did not match,
|
|
* try to match a command in $PATH, or a directory, or a file */
|
|
if (!matches)
|
|
match_pfx_len = complete_cmd_dir_file(match_buf, find_type);
|
|
|
|
/* Account for backslashes which will be inserted
|
|
* by quote_special_chars() later */
|
|
{
|
|
const char *e = match_buf + strlen(match_buf);
|
|
const char *s = e - match_pfx_len;
|
|
while (s < e)
|
|
if (is_special_char(*s++))
|
|
match_pfx_len++;
|
|
}
|
|
|
|
/* Remove duplicates */
|
|
if (matches) {
|
|
unsigned i, n = 0;
|
|
qsort_string_vector(matches, num_matches);
|
|
for (i = 0; i < num_matches - 1; ++i) {
|
|
//if (matches[i] && matches[i+1]) { /* paranoia */
|
|
if (strcmp(matches[i], matches[i+1]) == 0) {
|
|
free(matches[i]);
|
|
//matches[i] = NULL; /* paranoia */
|
|
} else {
|
|
matches[n++] = matches[i];
|
|
}
|
|
//}
|
|
}
|
|
matches[n++] = matches[i];
|
|
num_matches = n;
|
|
}
|
|
|
|
/* Did we find exactly one match? */
|
|
if (num_matches != 1) { /* no */
|
|
char *cp;
|
|
beep();
|
|
if (!matches)
|
|
goto ret; /* no matches at all */
|
|
/* Find common prefix */
|
|
chosen_match = xstrdup(matches[0]);
|
|
for (cp = chosen_match; *cp; cp++) {
|
|
unsigned n;
|
|
for (n = 1; n < num_matches; n++) {
|
|
if (matches[n][cp - chosen_match] != *cp) {
|
|
goto stop;
|
|
}
|
|
}
|
|
}
|
|
stop:
|
|
if (cp == chosen_match) { /* have unique prefix? */
|
|
goto ret; /* no */
|
|
}
|
|
*cp = '\0';
|
|
cp = quote_special_chars(chosen_match);
|
|
free(chosen_match);
|
|
chosen_match = cp;
|
|
len_found = strlen(chosen_match);
|
|
} else { /* exactly one match */
|
|
/* Next <tab> is not a double-tab */
|
|
*lastWasTab = 0;
|
|
|
|
chosen_match = quote_special_chars(matches[0]);
|
|
len_found = strlen(chosen_match);
|
|
if (chosen_match[len_found-1] != '/') {
|
|
chosen_match[len_found] = ' ';
|
|
chosen_match[++len_found] = '\0';
|
|
}
|
|
}
|
|
|
|
# if !ENABLE_UNICODE_SUPPORT
|
|
/* Have space to place the match? */
|
|
/* The result consists of three parts with these lengths: */
|
|
/* cursor + (len_found - match_pfx_len) + (command_len - cursor) */
|
|
/* it simplifies into: */
|
|
if ((int)(len_found - match_pfx_len + command_len) < S.maxsize) {
|
|
int pos;
|
|
/* save tail */
|
|
strcpy(match_buf, &command_ps[cursor]);
|
|
/* add match and tail */
|
|
sprintf(&command_ps[cursor], "%s%s", chosen_match + match_pfx_len, match_buf);
|
|
command_len = strlen(command_ps);
|
|
/* new pos */
|
|
pos = cursor + len_found - match_pfx_len;
|
|
/* write out the matched command */
|
|
redraw(cmdedit_y, command_len - pos);
|
|
}
|
|
# else
|
|
{
|
|
/* Use 2nd half of match_buf as scratch space - see (**) */
|
|
char *command = match_buf + MAX_LINELEN;
|
|
int len = save_string(command, MAX_LINELEN);
|
|
/* Have space to place the match? */
|
|
/* cursor_mb + (len_found - match_pfx_len) + (len - cursor_mb) */
|
|
if ((int)(len_found - match_pfx_len + len) < MAX_LINELEN) {
|
|
int pos;
|
|
/* save tail */
|
|
strcpy(match_buf, &command[cursor_mb]);
|
|
/* where do we want to have cursor after all? */
|
|
strcpy(&command[cursor_mb], chosen_match + match_pfx_len);
|
|
len = load_string(command, S.maxsize);
|
|
/* add match and tail */
|
|
sprintf(&command[cursor_mb], "%s%s", chosen_match + match_pfx_len, match_buf);
|
|
command_len = load_string(command, S.maxsize);
|
|
/* write out the matched command */
|
|
/* paranoia: load_string can return 0 on conv error,
|
|
* prevent passing pos = (0 - 12) to redraw */
|
|
pos = command_len - len;
|
|
redraw(cmdedit_y, pos >= 0 ? pos : 0);
|
|
}
|
|
}
|
|
# endif
|
|
ret:
|
|
free(chosen_match);
|
|
free(match_buf);
|
|
}
|
|
|
|
#endif /* FEATURE_TAB_COMPLETION */
|
|
|
|
|
|
line_input_t* FAST_FUNC new_line_input_t(int flags)
|
|
{
|
|
line_input_t *n = xzalloc(sizeof(*n));
|
|
n->flags = flags;
|
|
n->max_history = MAX_HISTORY;
|
|
return n;
|
|
}
|
|
|
|
|
|
#if MAX_HISTORY > 0
|
|
|
|
unsigned size_from_HISTFILESIZE(const char *hp)
|
|
{
|
|
int size = MAX_HISTORY;
|
|
if (hp) {
|
|
size = atoi(hp);
|
|
if (size <= 0)
|
|
return 1;
|
|
if (size > MAX_HISTORY)
|
|
return MAX_HISTORY;
|
|
}
|
|
return size;
|
|
}
|
|
|
|
static void save_command_ps_at_cur_history(void)
|
|
{
|
|
if (command_ps[0] != BB_NUL) {
|
|
int cur = state->cur_history;
|
|
free(state->history[cur]);
|
|
|
|
# if ENABLE_UNICODE_SUPPORT
|
|
{
|
|
char tbuf[MAX_LINELEN];
|
|
save_string(tbuf, sizeof(tbuf));
|
|
state->history[cur] = xstrdup(tbuf);
|
|
}
|
|
# else
|
|
state->history[cur] = xstrdup(command_ps);
|
|
# endif
|
|
}
|
|
}
|
|
|
|
/* state->flags is already checked to be nonzero */
|
|
static int get_previous_history(void)
|
|
{
|
|
if ((state->flags & DO_HISTORY) && state->cur_history) {
|
|
save_command_ps_at_cur_history();
|
|
state->cur_history--;
|
|
return 1;
|
|
}
|
|
beep();
|
|
return 0;
|
|
}
|
|
|
|
static int get_next_history(void)
|
|
{
|
|
if (state->flags & DO_HISTORY) {
|
|
if (state->cur_history < state->cnt_history) {
|
|
save_command_ps_at_cur_history(); /* save the current history line */
|
|
return ++state->cur_history;
|
|
}
|
|
}
|
|
beep();
|
|
return 0;
|
|
}
|
|
|
|
# if ENABLE_FEATURE_EDITING_SAVEHISTORY
|
|
/* We try to ensure that concurrent additions to the history
|
|
* do not overwrite each other.
|
|
* Otherwise shell users get unhappy.
|
|
*
|
|
* History file is trimmed lazily, when it grows several times longer
|
|
* than configured MAX_HISTORY lines.
|
|
*/
|
|
|
|
static void free_line_input_t(line_input_t *n)
|
|
{
|
|
int i = n->cnt_history;
|
|
while (i > 0)
|
|
free(n->history[--i]);
|
|
free(n);
|
|
}
|
|
|
|
/* state->flags is already checked to be nonzero */
|
|
static void load_history(line_input_t *st_parm)
|
|
{
|
|
char *temp_h[MAX_HISTORY];
|
|
char *line;
|
|
FILE *fp;
|
|
unsigned idx, i, line_len;
|
|
|
|
/* NB: do not trash old history if file can't be opened */
|
|
|
|
fp = fopen_for_read(st_parm->hist_file);
|
|
if (fp) {
|
|
/* clean up old history */
|
|
for (idx = st_parm->cnt_history; idx > 0;) {
|
|
idx--;
|
|
free(st_parm->history[idx]);
|
|
st_parm->history[idx] = NULL;
|
|
}
|
|
|
|
/* fill temp_h[], retaining only last MAX_HISTORY lines */
|
|
memset(temp_h, 0, sizeof(temp_h));
|
|
st_parm->cnt_history_in_file = idx = 0;
|
|
while ((line = xmalloc_fgetline(fp)) != NULL) {
|
|
if (line[0] == '\0') {
|
|
free(line);
|
|
continue;
|
|
}
|
|
free(temp_h[idx]);
|
|
temp_h[idx] = line;
|
|
st_parm->cnt_history_in_file++;
|
|
idx++;
|
|
if (idx == st_parm->max_history)
|
|
idx = 0;
|
|
}
|
|
fclose(fp);
|
|
|
|
/* find first non-NULL temp_h[], if any */
|
|
if (st_parm->cnt_history_in_file) {
|
|
while (temp_h[idx] == NULL) {
|
|
idx++;
|
|
if (idx == st_parm->max_history)
|
|
idx = 0;
|
|
}
|
|
}
|
|
|
|
/* copy temp_h[] to st_parm->history[] */
|
|
for (i = 0; i < st_parm->max_history;) {
|
|
line = temp_h[idx];
|
|
if (!line)
|
|
break;
|
|
idx++;
|
|
if (idx == st_parm->max_history)
|
|
idx = 0;
|
|
line_len = strlen(line);
|
|
if (line_len >= MAX_LINELEN)
|
|
line[MAX_LINELEN-1] = '\0';
|
|
st_parm->history[i++] = line;
|
|
}
|
|
st_parm->cnt_history = i;
|
|
}
|
|
}
|
|
|
|
/* state->flags is already checked to be nonzero */
|
|
static void save_history(char *str)
|
|
{
|
|
int fd;
|
|
int len, len2;
|
|
|
|
fd = open(state->hist_file, O_WRONLY | O_CREAT | O_APPEND, 0600);
|
|
if (fd < 0)
|
|
return;
|
|
xlseek(fd, 0, SEEK_END); /* paranoia */
|
|
len = strlen(str);
|
|
str[len] = '\n'; /* we (try to) do atomic write */
|
|
len2 = full_write(fd, str, len + 1);
|
|
str[len] = '\0';
|
|
close(fd);
|
|
if (len2 != len + 1)
|
|
return; /* "wtf?" */
|
|
|
|
/* did we write so much that history file needs trimming? */
|
|
state->cnt_history_in_file++;
|
|
if (state->cnt_history_in_file > state->max_history * 4) {
|
|
char *new_name;
|
|
line_input_t *st_temp;
|
|
|
|
/* we may have concurrently written entries from others.
|
|
* load them */
|
|
st_temp = new_line_input_t(state->flags);
|
|
st_temp->hist_file = state->hist_file;
|
|
load_history(st_temp);
|
|
|
|
/* write out temp file and replace hist_file atomically */
|
|
new_name = xasprintf("%s.%u.new", state->hist_file, (int) getpid());
|
|
fd = open(state->hist_file, O_WRONLY | O_CREAT | O_TRUNC, 0600);
|
|
if (fd >= 0) {
|
|
FILE *fp;
|
|
int i;
|
|
|
|
fp = xfdopen_for_write(fd);
|
|
for (i = 0; i < st_temp->cnt_history; i++)
|
|
fprintf(fp, "%s\n", st_temp->history[i]);
|
|
fclose(fp);
|
|
if (rename(new_name, state->hist_file) == 0)
|
|
state->cnt_history_in_file = st_temp->cnt_history;
|
|
}
|
|
free(new_name);
|
|
free_line_input_t(st_temp);
|
|
}
|
|
}
|
|
# else
|
|
# define load_history(a) ((void)0)
|
|
# define save_history(a) ((void)0)
|
|
# endif /* FEATURE_COMMAND_SAVEHISTORY */
|
|
|
|
static void remember_in_history(char *str)
|
|
{
|
|
int i;
|
|
|
|
if (!(state->flags & DO_HISTORY))
|
|
return;
|
|
if (str[0] == '\0')
|
|
return;
|
|
i = state->cnt_history;
|
|
/* Don't save dupes */
|
|
if (i && strcmp(state->history[i-1], str) == 0)
|
|
return;
|
|
|
|
free(state->history[state->max_history]); /* redundant, paranoia */
|
|
state->history[state->max_history] = NULL; /* redundant, paranoia */
|
|
|
|
/* If history[] is full, remove the oldest command */
|
|
/* we need to keep history[state->max_history] empty, hence >=, not > */
|
|
if (i >= state->max_history) {
|
|
free(state->history[0]);
|
|
for (i = 0; i < state->max_history-1; i++)
|
|
state->history[i] = state->history[i+1];
|
|
/* i == state->max_history-1 */
|
|
}
|
|
/* i <= state->max_history-1 */
|
|
state->history[i++] = xstrdup(str);
|
|
/* i <= state->max_history */
|
|
state->cur_history = i;
|
|
state->cnt_history = i;
|
|
# if MAX_HISTORY > 0 && ENABLE_FEATURE_EDITING_SAVEHISTORY
|
|
if ((state->flags & SAVE_HISTORY) && state->hist_file)
|
|
save_history(str);
|
|
# endif
|
|
IF_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines++;)
|
|
}
|
|
|
|
#else /* MAX_HISTORY == 0 */
|
|
# define remember_in_history(a) ((void)0)
|
|
#endif /* MAX_HISTORY */
|
|
|
|
|
|
#if ENABLE_FEATURE_EDITING_VI
|
|
/*
|
|
* vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
|
|
*/
|
|
static void
|
|
vi_Word_motion(int eat)
|
|
{
|
|
CHAR_T *command = command_ps;
|
|
|
|
while (cursor < command_len && !BB_isspace(command[cursor]))
|
|
input_forward();
|
|
if (eat) while (cursor < command_len && BB_isspace(command[cursor]))
|
|
input_forward();
|
|
}
|
|
|
|
static void
|
|
vi_word_motion(int eat)
|
|
{
|
|
CHAR_T *command = command_ps;
|
|
|
|
if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
|
|
while (cursor < command_len
|
|
&& (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
|
|
) {
|
|
input_forward();
|
|
}
|
|
} else if (BB_ispunct(command[cursor])) {
|
|
while (cursor < command_len && BB_ispunct(command[cursor+1]))
|
|
input_forward();
|
|
}
|
|
|
|
if (cursor < command_len)
|
|
input_forward();
|
|
|
|
if (eat) {
|
|
while (cursor < command_len && BB_isspace(command[cursor]))
|
|
input_forward();
|
|
}
|
|
}
|
|
|
|
static void
|
|
vi_End_motion(void)
|
|
{
|
|
CHAR_T *command = command_ps;
|
|
|
|
input_forward();
|
|
while (cursor < command_len && BB_isspace(command[cursor]))
|
|
input_forward();
|
|
while (cursor < command_len-1 && !BB_isspace(command[cursor+1]))
|
|
input_forward();
|
|
}
|
|
|
|
static void
|
|
vi_end_motion(void)
|
|
{
|
|
CHAR_T *command = command_ps;
|
|
|
|
if (cursor >= command_len-1)
|
|
return;
|
|
input_forward();
|
|
while (cursor < command_len-1 && BB_isspace(command[cursor]))
|
|
input_forward();
|
|
if (cursor >= command_len-1)
|
|
return;
|
|
if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
|
|
while (cursor < command_len-1
|
|
&& (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
|
|
) {
|
|
input_forward();
|
|
}
|
|
} else if (BB_ispunct(command[cursor])) {
|
|
while (cursor < command_len-1 && BB_ispunct(command[cursor+1]))
|
|
input_forward();
|
|
}
|
|
}
|
|
|
|
static void
|
|
vi_Back_motion(void)
|
|
{
|
|
CHAR_T *command = command_ps;
|
|
|
|
while (cursor > 0 && BB_isspace(command[cursor-1]))
|
|
input_backward(1);
|
|
while (cursor > 0 && !BB_isspace(command[cursor-1]))
|
|
input_backward(1);
|
|
}
|
|
|
|
static void
|
|
vi_back_motion(void)
|
|
{
|
|
CHAR_T *command = command_ps;
|
|
|
|
if (cursor <= 0)
|
|
return;
|
|
input_backward(1);
|
|
while (cursor > 0 && BB_isspace(command[cursor]))
|
|
input_backward(1);
|
|
if (cursor <= 0)
|
|
return;
|
|
if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
|
|
while (cursor > 0
|
|
&& (BB_isalnum(command[cursor-1]) || command[cursor-1] == '_')
|
|
) {
|
|
input_backward(1);
|
|
}
|
|
} else if (BB_ispunct(command[cursor])) {
|
|
while (cursor > 0 && BB_ispunct(command[cursor-1]))
|
|
input_backward(1);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
|
|
static void ctrl_left(void)
|
|
{
|
|
CHAR_T *command = command_ps;
|
|
|
|
while (1) {
|
|
CHAR_T c;
|
|
|
|
input_backward(1);
|
|
if (cursor == 0)
|
|
break;
|
|
c = command[cursor];
|
|
if (c != ' ' && !BB_ispunct(c)) {
|
|
/* we reached a "word" delimited by spaces/punct.
|
|
* go to its beginning */
|
|
while (1) {
|
|
c = command[cursor - 1];
|
|
if (c == ' ' || BB_ispunct(c))
|
|
break;
|
|
input_backward(1);
|
|
if (cursor == 0)
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
static void ctrl_right(void)
|
|
{
|
|
CHAR_T *command = command_ps;
|
|
|
|
while (1) {
|
|
CHAR_T c;
|
|
|
|
c = command[cursor];
|
|
if (c == BB_NUL)
|
|
break;
|
|
if (c != ' ' && !BB_ispunct(c)) {
|
|
/* we reached a "word" delimited by spaces/punct.
|
|
* go to its end + 1 */
|
|
while (1) {
|
|
input_forward();
|
|
c = command[cursor];
|
|
if (c == BB_NUL || c == ' ' || BB_ispunct(c))
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
input_forward();
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* read_line_input and its helpers
|
|
*/
|
|
|
|
#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
|
|
static void ask_terminal(void)
|
|
{
|
|
/* Ask terminal where is the cursor now.
|
|
* lineedit_read_key handles response and corrects
|
|
* our idea of current cursor position.
|
|
* Testcase: run "echo -n long_line_long_line_long_line",
|
|
* then type in a long, wrapping command and try to
|
|
* delete it using backspace key.
|
|
* Note: we print it _after_ prompt, because
|
|
* prompt may contain CR. Example: PS1='\[\r\n\]\w '
|
|
*/
|
|
/* Problem: if there is buffered input on stdin,
|
|
* the response will be delivered later,
|
|
* possibly to an unsuspecting application.
|
|
* Testcase: "sleep 1; busybox ash" + press and hold [Enter].
|
|
* Result:
|
|
* ~/srcdevel/bbox/fix/busybox.t4 #
|
|
* ~/srcdevel/bbox/fix/busybox.t4 #
|
|
* ^[[59;34~/srcdevel/bbox/fix/busybox.t4 # <-- garbage
|
|
* ~/srcdevel/bbox/fix/busybox.t4 #
|
|
*
|
|
* Checking for input with poll only makes the race narrower,
|
|
* I still can trigger it. Strace:
|
|
*
|
|
* write(1, "~/srcdevel/bbox/fix/busybox.t4 # ", 33) = 33
|
|
* poll([{fd=0, events=POLLIN}], 1, 0) = 0 (Timeout) <-- no input exists
|
|
* write(1, "\33[6n", 4) = 4 <-- send the ESC sequence, quick!
|
|
* poll([{fd=0, events=POLLIN}], 1, 4294967295) = 1 ([{fd=0, revents=POLLIN}])
|
|
* read(0, "\n", 1) = 1 <-- oh crap, user's input got in first
|
|
*/
|
|
struct pollfd pfd;
|
|
|
|
pfd.fd = STDIN_FILENO;
|
|
pfd.events = POLLIN;
|
|
if (safe_poll(&pfd, 1, 0) == 0) {
|
|
S.sent_ESC_br6n = 1;
|
|
fputs(ESC"[6n", stdout);
|
|
fflush_all(); /* make terminal see it ASAP! */
|
|
}
|
|
}
|
|
#else
|
|
#define ask_terminal() ((void)0)
|
|
#endif
|
|
|
|
#if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
|
static void parse_and_put_prompt(const char *prmt_ptr)
|
|
{
|
|
cmdedit_prompt = prmt_ptr;
|
|
cmdedit_prmt_len = strlen(prmt_ptr);
|
|
put_prompt();
|
|
}
|
|
#else
|
|
static void parse_and_put_prompt(const char *prmt_ptr)
|
|
{
|
|
int prmt_len = 0;
|
|
size_t cur_prmt_len = 0;
|
|
char flg_not_length = '[';
|
|
char *prmt_mem_ptr = xzalloc(1);
|
|
char *cwd_buf = xrealloc_getcwd_or_warn(NULL);
|
|
char cbuf[2];
|
|
char c;
|
|
char *pbuf;
|
|
|
|
cmdedit_prmt_len = 0;
|
|
|
|
if (!cwd_buf) {
|
|
cwd_buf = (char *)bb_msg_unknown;
|
|
}
|
|
|
|
cbuf[1] = '\0'; /* never changes */
|
|
|
|
while (*prmt_ptr) {
|
|
char *free_me = NULL;
|
|
|
|
pbuf = cbuf;
|
|
c = *prmt_ptr++;
|
|
if (c == '\\') {
|
|
const char *cp = prmt_ptr;
|
|
int l;
|
|
|
|
c = bb_process_escape_sequence(&prmt_ptr);
|
|
if (prmt_ptr == cp) {
|
|
if (*cp == '\0')
|
|
break;
|
|
c = *prmt_ptr++;
|
|
|
|
switch (c) {
|
|
# if ENABLE_USERNAME_OR_HOMEDIR
|
|
case 'u':
|
|
pbuf = user_buf ? user_buf : (char*)"";
|
|
break;
|
|
# endif
|
|
case 'h':
|
|
pbuf = free_me = safe_gethostname();
|
|
*strchrnul(pbuf, '.') = '\0';
|
|
break;
|
|
case '$':
|
|
c = (geteuid() == 0 ? '#' : '$');
|
|
break;
|
|
# if ENABLE_USERNAME_OR_HOMEDIR
|
|
case 'w':
|
|
/* /home/user[/something] -> ~[/something] */
|
|
pbuf = cwd_buf;
|
|
l = strlen(home_pwd_buf);
|
|
if (l != 0
|
|
&& strncmp(home_pwd_buf, cwd_buf, l) == 0
|
|
&& (cwd_buf[l]=='/' || cwd_buf[l]=='\0')
|
|
&& strlen(cwd_buf + l) < PATH_MAX
|
|
) {
|
|
pbuf = free_me = xasprintf("~%s", cwd_buf + l);
|
|
}
|
|
break;
|
|
# endif
|
|
case 'W':
|
|
pbuf = cwd_buf;
|
|
cp = strrchr(pbuf, '/');
|
|
if (cp != NULL && cp != pbuf)
|
|
pbuf += (cp-pbuf) + 1;
|
|
break;
|
|
case '!':
|
|
pbuf = free_me = xasprintf("%d", num_ok_lines);
|
|
break;
|
|
case 'e': case 'E': /* \e \E = \033 */
|
|
c = '\033';
|
|
break;
|
|
case 'x': case 'X': {
|
|
char buf2[4];
|
|
for (l = 0; l < 3;) {
|
|
unsigned h;
|
|
buf2[l++] = *prmt_ptr;
|
|
buf2[l] = '\0';
|
|
h = strtoul(buf2, &pbuf, 16);
|
|
if (h > UCHAR_MAX || (pbuf - buf2) < l) {
|
|
buf2[--l] = '\0';
|
|
break;
|
|
}
|
|
prmt_ptr++;
|
|
}
|
|
c = (char)strtoul(buf2, NULL, 16);
|
|
if (c == 0)
|
|
c = '?';
|
|
pbuf = cbuf;
|
|
break;
|
|
}
|
|
case '[': case ']':
|
|
if (c == flg_not_length) {
|
|
flg_not_length = (flg_not_length == '[' ? ']' : '[');
|
|
continue;
|
|
}
|
|
break;
|
|
} /* switch */
|
|
} /* if */
|
|
} /* if */
|
|
cbuf[0] = c;
|
|
cur_prmt_len = strlen(pbuf);
|
|
prmt_len += cur_prmt_len;
|
|
if (flg_not_length != ']')
|
|
cmdedit_prmt_len += cur_prmt_len;
|
|
prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_len+1), pbuf);
|
|
free(free_me);
|
|
} /* while */
|
|
|
|
if (cwd_buf != (char *)bb_msg_unknown)
|
|
free(cwd_buf);
|
|
cmdedit_prompt = prmt_mem_ptr;
|
|
put_prompt();
|
|
}
|
|
#endif
|
|
|
|
static void cmdedit_setwidth(unsigned w, int redraw_flg)
|
|
{
|
|
cmdedit_termw = w;
|
|
if (redraw_flg) {
|
|
/* new y for current cursor */
|
|
int new_y = (cursor + cmdedit_prmt_len) / w;
|
|
/* redraw */
|
|
redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
|
|
fflush_all();
|
|
}
|
|
}
|
|
|
|
static void win_changed(int nsig)
|
|
{
|
|
int sv_errno = errno;
|
|
unsigned width;
|
|
get_terminal_width_height(0, &width, NULL);
|
|
cmdedit_setwidth(width, nsig /* - just a yes/no flag */);
|
|
if (nsig == SIGWINCH)
|
|
signal(SIGWINCH, win_changed); /* rearm ourself */
|
|
errno = sv_errno;
|
|
}
|
|
|
|
static int lineedit_read_key(char *read_key_buffer, int timeout)
|
|
{
|
|
int64_t ic;
|
|
#if ENABLE_UNICODE_SUPPORT
|
|
char unicode_buf[MB_CUR_MAX + 1];
|
|
int unicode_idx = 0;
|
|
#endif
|
|
|
|
while (1) {
|
|
/* Wait for input. TIMEOUT = -1 makes read_key wait even
|
|
* on nonblocking stdin, TIMEOUT = 50 makes sure we won't
|
|
* insist on full MB_CUR_MAX buffer to declare input like
|
|
* "\xff\n",pause,"ls\n" invalid and thus won't lose "ls".
|
|
*
|
|
* Note: read_key sets errno to 0 on success.
|
|
*/
|
|
ic = read_key(STDIN_FILENO, read_key_buffer, timeout);
|
|
if (errno) {
|
|
#if ENABLE_UNICODE_SUPPORT
|
|
if (errno == EAGAIN && unicode_idx != 0)
|
|
goto pushback;
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
|
|
if ((int32_t)ic == KEYCODE_CURSOR_POS
|
|
&& S.sent_ESC_br6n
|
|
) {
|
|
S.sent_ESC_br6n = 0;
|
|
if (cursor == 0) { /* otherwise it may be bogus */
|
|
int col = ((ic >> 32) & 0x7fff) - 1;
|
|
if (col > cmdedit_prmt_len) {
|
|
cmdedit_x += (col - cmdedit_prmt_len);
|
|
while (cmdedit_x >= cmdedit_termw) {
|
|
cmdedit_x -= cmdedit_termw;
|
|
cmdedit_y++;
|
|
}
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
#if ENABLE_UNICODE_SUPPORT
|
|
if (unicode_status == UNICODE_ON) {
|
|
wchar_t wc;
|
|
|
|
if ((int32_t)ic < 0) /* KEYCODE_xxx */
|
|
break;
|
|
// TODO: imagine sequence like: 0xff,<left-arrow>: we are currently losing 0xff...
|
|
|
|
unicode_buf[unicode_idx++] = ic;
|
|
unicode_buf[unicode_idx] = '\0';
|
|
if (mbstowcs(&wc, unicode_buf, 1) != 1) {
|
|
/* Not (yet?) a valid unicode char */
|
|
if (unicode_idx < MB_CUR_MAX) {
|
|
timeout = 50;
|
|
continue;
|
|
}
|
|
pushback:
|
|
/* Invalid sequence. Save all "bad bytes" except first */
|
|
read_key_ungets(read_key_buffer, unicode_buf + 1, unicode_idx - 1);
|
|
# if !ENABLE_UNICODE_PRESERVE_BROKEN
|
|
ic = CONFIG_SUBST_WCHAR;
|
|
# else
|
|
ic = unicode_mark_raw_byte(unicode_buf[0]);
|
|
# endif
|
|
} else {
|
|
/* Valid unicode char, return its code */
|
|
ic = wc;
|
|
}
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
return ic;
|
|
}
|
|
|
|
#if ENABLE_UNICODE_BIDI_SUPPORT
|
|
static int isrtl_str(void)
|
|
{
|
|
int idx = cursor;
|
|
|
|
while (idx < command_len && unicode_bidi_is_neutral_wchar(command_ps[idx]))
|
|
idx++;
|
|
return unicode_bidi_isrtl(command_ps[idx]);
|
|
}
|
|
#else
|
|
# define isrtl_str() 0
|
|
#endif
|
|
|
|
/* leave out the "vi-mode"-only case labels if vi editing isn't
|
|
* configured. */
|
|
#define vi_case(caselabel) IF_FEATURE_EDITING_VI(case caselabel)
|
|
|
|
/* convert uppercase ascii to equivalent control char, for readability */
|
|
#undef CTRL
|
|
#define CTRL(a) ((a) & ~0x40)
|
|
|
|
/* maxsize must be >= 2.
|
|
* Returns:
|
|
* -1 on read errors or EOF, or on bare Ctrl-D,
|
|
* 0 on ctrl-C (the line entered is still returned in 'command'),
|
|
* >0 length of input string, including terminating '\n'
|
|
*/
|
|
int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout)
|
|
{
|
|
int len;
|
|
#if ENABLE_FEATURE_TAB_COMPLETION
|
|
smallint lastWasTab = 0;
|
|
#endif
|
|
smallint break_out = 0;
|
|
#if ENABLE_FEATURE_EDITING_VI
|
|
smallint vi_cmdmode = 0;
|
|
#endif
|
|
struct termios initial_settings;
|
|
struct termios new_settings;
|
|
char read_key_buffer[KEYCODE_BUFFER_SIZE];
|
|
|
|
INIT_S();
|
|
|
|
if (tcgetattr(STDIN_FILENO, &initial_settings) < 0
|
|
|| !(initial_settings.c_lflag & ECHO)
|
|
) {
|
|
/* Happens when e.g. stty -echo was run before */
|
|
parse_and_put_prompt(prompt);
|
|
/* fflush_all(); - done by parse_and_put_prompt */
|
|
if (fgets(command, maxsize, stdin) == NULL)
|
|
len = -1; /* EOF or error */
|
|
else
|
|
len = strlen(command);
|
|
DEINIT_S();
|
|
return len;
|
|
}
|
|
|
|
init_unicode();
|
|
|
|
// FIXME: audit & improve this
|
|
if (maxsize > MAX_LINELEN)
|
|
maxsize = MAX_LINELEN;
|
|
S.maxsize = maxsize;
|
|
|
|
/* With zero flags, no other fields are ever used */
|
|
state = st ? st : (line_input_t*) &const_int_0;
|
|
#if MAX_HISTORY > 0
|
|
# if ENABLE_FEATURE_EDITING_SAVEHISTORY
|
|
if ((state->flags & SAVE_HISTORY) && state->hist_file)
|
|
if (state->cnt_history == 0)
|
|
load_history(state);
|
|
# endif
|
|
if (state->flags & DO_HISTORY)
|
|
state->cur_history = state->cnt_history;
|
|
#endif
|
|
|
|
/* prepare before init handlers */
|
|
cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
|
|
command_len = 0;
|
|
#if ENABLE_UNICODE_SUPPORT
|
|
command_ps = xzalloc(maxsize * sizeof(command_ps[0]));
|
|
#else
|
|
command_ps = command;
|
|
command[0] = '\0';
|
|
#endif
|
|
#define command command_must_not_be_used
|
|
|
|
new_settings = initial_settings;
|
|
new_settings.c_lflag &= ~ICANON; /* unbuffered input */
|
|
/* Turn off echoing and CTRL-C, so we can trap it */
|
|
new_settings.c_lflag &= ~(ECHO | ECHONL | ISIG);
|
|
/* Hmm, in linux c_cc[] is not parsed if ICANON is off */
|
|
new_settings.c_cc[VMIN] = 1;
|
|
new_settings.c_cc[VTIME] = 0;
|
|
/* Turn off CTRL-C, so we can trap it */
|
|
#ifndef _POSIX_VDISABLE
|
|
# define _POSIX_VDISABLE '\0'
|
|
#endif
|
|
new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
|
|
tcsetattr_stdin_TCSANOW(&new_settings);
|
|
|
|
previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
|
|
win_changed(0); /* do initial resizing */
|
|
#if ENABLE_USERNAME_OR_HOMEDIR
|
|
{
|
|
struct passwd *entry;
|
|
|
|
entry = getpwuid(geteuid());
|
|
if (entry) {
|
|
user_buf = xstrdup(entry->pw_name);
|
|
home_pwd_buf = xstrdup(entry->pw_dir);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if 0
|
|
for (i = 0; i <= state->max_history; i++)
|
|
bb_error_msg("history[%d]:'%s'", i, state->history[i]);
|
|
bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
|
|
#endif
|
|
|
|
/* Print out the command prompt, optionally ask where cursor is */
|
|
parse_and_put_prompt(prompt);
|
|
ask_terminal();
|
|
|
|
read_key_buffer[0] = 0;
|
|
while (1) {
|
|
/*
|
|
* The emacs and vi modes share much of the code in the big
|
|
* command loop. Commands entered when in vi's command mode
|
|
* (aka "escape mode") get an extra bit added to distinguish
|
|
* them - this keeps them from being self-inserted. This
|
|
* clutters the big switch a bit, but keeps all the code
|
|
* in one place.
|
|
*/
|
|
enum {
|
|
VI_CMDMODE_BIT = 0x40000000,
|
|
/* 0x80000000 bit flags KEYCODE_xxx */
|
|
};
|
|
int32_t ic, ic_raw;
|
|
|
|
fflush_all();
|
|
ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
|
|
|
|
#if ENABLE_FEATURE_EDITING_VI
|
|
newdelflag = 1;
|
|
if (vi_cmdmode) {
|
|
/* btw, since KEYCODE_xxx are all < 0, this doesn't
|
|
* change ic if it contains one of them: */
|
|
ic |= VI_CMDMODE_BIT;
|
|
}
|
|
#endif
|
|
|
|
switch (ic) {
|
|
case '\n':
|
|
case '\r':
|
|
vi_case('\n'|VI_CMDMODE_BIT:)
|
|
vi_case('\r'|VI_CMDMODE_BIT:)
|
|
/* Enter */
|
|
goto_new_line();
|
|
break_out = 1;
|
|
break;
|
|
case CTRL('A'):
|
|
vi_case('0'|VI_CMDMODE_BIT:)
|
|
/* Control-a -- Beginning of line */
|
|
input_backward(cursor);
|
|
break;
|
|
case CTRL('B'):
|
|
vi_case('h'|VI_CMDMODE_BIT:)
|
|
vi_case('\b'|VI_CMDMODE_BIT:) /* ^H */
|
|
vi_case('\x7f'|VI_CMDMODE_BIT:) /* DEL */
|
|
input_backward(1); /* Move back one character */
|
|
break;
|
|
case CTRL('E'):
|
|
vi_case('$'|VI_CMDMODE_BIT:)
|
|
/* Control-e -- End of line */
|
|
put_till_end_and_adv_cursor();
|
|
break;
|
|
case CTRL('F'):
|
|
vi_case('l'|VI_CMDMODE_BIT:)
|
|
vi_case(' '|VI_CMDMODE_BIT:)
|
|
input_forward(); /* Move forward one character */
|
|
break;
|
|
case '\b': /* ^H */
|
|
case '\x7f': /* DEL */
|
|
if (!isrtl_str())
|
|
input_backspace();
|
|
else
|
|
input_delete(0);
|
|
break;
|
|
case KEYCODE_DELETE:
|
|
if (!isrtl_str())
|
|
input_delete(0);
|
|
else
|
|
input_backspace();
|
|
break;
|
|
#if ENABLE_FEATURE_TAB_COMPLETION
|
|
case '\t':
|
|
input_tab(&lastWasTab);
|
|
break;
|
|
#endif
|
|
case CTRL('K'):
|
|
/* Control-k -- clear to end of line */
|
|
command_ps[cursor] = BB_NUL;
|
|
command_len = cursor;
|
|
printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
|
|
break;
|
|
case CTRL('L'):
|
|
vi_case(CTRL('L')|VI_CMDMODE_BIT:)
|
|
/* Control-l -- clear screen */
|
|
printf(ESC"[H"); /* cursor to top,left */
|
|
redraw(0, command_len - cursor);
|
|
break;
|
|
#if MAX_HISTORY > 0
|
|
case CTRL('N'):
|
|
vi_case(CTRL('N')|VI_CMDMODE_BIT:)
|
|
vi_case('j'|VI_CMDMODE_BIT:)
|
|
/* Control-n -- Get next command in history */
|
|
if (get_next_history())
|
|
goto rewrite_line;
|
|
break;
|
|
case CTRL('P'):
|
|
vi_case(CTRL('P')|VI_CMDMODE_BIT:)
|
|
vi_case('k'|VI_CMDMODE_BIT:)
|
|
/* Control-p -- Get previous command from history */
|
|
if (get_previous_history())
|
|
goto rewrite_line;
|
|
break;
|
|
#endif
|
|
case CTRL('U'):
|
|
vi_case(CTRL('U')|VI_CMDMODE_BIT:)
|
|
/* Control-U -- Clear line before cursor */
|
|
if (cursor) {
|
|
command_len -= cursor;
|
|
memmove(command_ps, command_ps + cursor,
|
|
(command_len + 1) * sizeof(command_ps[0]));
|
|
redraw(cmdedit_y, command_len);
|
|
}
|
|
break;
|
|
case CTRL('W'):
|
|
vi_case(CTRL('W')|VI_CMDMODE_BIT:)
|
|
/* Control-W -- Remove the last word */
|
|
while (cursor > 0 && BB_isspace(command_ps[cursor-1]))
|
|
input_backspace();
|
|
while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
|
|
input_backspace();
|
|
break;
|
|
|
|
#if ENABLE_FEATURE_EDITING_VI
|
|
case 'i'|VI_CMDMODE_BIT:
|
|
vi_cmdmode = 0;
|
|
break;
|
|
case 'I'|VI_CMDMODE_BIT:
|
|
input_backward(cursor);
|
|
vi_cmdmode = 0;
|
|
break;
|
|
case 'a'|VI_CMDMODE_BIT:
|
|
input_forward();
|
|
vi_cmdmode = 0;
|
|
break;
|
|
case 'A'|VI_CMDMODE_BIT:
|
|
put_till_end_and_adv_cursor();
|
|
vi_cmdmode = 0;
|
|
break;
|
|
case 'x'|VI_CMDMODE_BIT:
|
|
input_delete(1);
|
|
break;
|
|
case 'X'|VI_CMDMODE_BIT:
|
|
if (cursor > 0) {
|
|
input_backward(1);
|
|
input_delete(1);
|
|
}
|
|
break;
|
|
case 'W'|VI_CMDMODE_BIT:
|
|
vi_Word_motion(1);
|
|
break;
|
|
case 'w'|VI_CMDMODE_BIT:
|
|
vi_word_motion(1);
|
|
break;
|
|
case 'E'|VI_CMDMODE_BIT:
|
|
vi_End_motion();
|
|
break;
|
|
case 'e'|VI_CMDMODE_BIT:
|
|
vi_end_motion();
|
|
break;
|
|
case 'B'|VI_CMDMODE_BIT:
|
|
vi_Back_motion();
|
|
break;
|
|
case 'b'|VI_CMDMODE_BIT:
|
|
vi_back_motion();
|
|
break;
|
|
case 'C'|VI_CMDMODE_BIT:
|
|
vi_cmdmode = 0;
|
|
/* fall through */
|
|
case 'D'|VI_CMDMODE_BIT:
|
|
goto clear_to_eol;
|
|
|
|
case 'c'|VI_CMDMODE_BIT:
|
|
vi_cmdmode = 0;
|
|
/* fall through */
|
|
case 'd'|VI_CMDMODE_BIT: {
|
|
int nc, sc;
|
|
|
|
ic = lineedit_read_key(read_key_buffer, timeout);
|
|
if (errno) /* error */
|
|
goto return_error_indicator;
|
|
if (ic == ic_raw) { /* "cc", "dd" */
|
|
input_backward(cursor);
|
|
goto clear_to_eol;
|
|
break;
|
|
}
|
|
|
|
sc = cursor;
|
|
switch (ic) {
|
|
case 'w':
|
|
case 'W':
|
|
case 'e':
|
|
case 'E':
|
|
switch (ic) {
|
|
case 'w': /* "dw", "cw" */
|
|
vi_word_motion(vi_cmdmode);
|
|
break;
|
|
case 'W': /* 'dW', 'cW' */
|
|
vi_Word_motion(vi_cmdmode);
|
|
break;
|
|
case 'e': /* 'de', 'ce' */
|
|
vi_end_motion();
|
|
input_forward();
|
|
break;
|
|
case 'E': /* 'dE', 'cE' */
|
|
vi_End_motion();
|
|
input_forward();
|
|
break;
|
|
}
|
|
nc = cursor;
|
|
input_backward(cursor - sc);
|
|
while (nc-- > cursor)
|
|
input_delete(1);
|
|
break;
|
|
case 'b': /* "db", "cb" */
|
|
case 'B': /* implemented as B */
|
|
if (ic == 'b')
|
|
vi_back_motion();
|
|
else
|
|
vi_Back_motion();
|
|
while (sc-- > cursor)
|
|
input_delete(1);
|
|
break;
|
|
case ' ': /* "d ", "c " */
|
|
input_delete(1);
|
|
break;
|
|
case '$': /* "d$", "c$" */
|
|
clear_to_eol:
|
|
while (cursor < command_len)
|
|
input_delete(1);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case 'p'|VI_CMDMODE_BIT:
|
|
input_forward();
|
|
/* fallthrough */
|
|
case 'P'|VI_CMDMODE_BIT:
|
|
put();
|
|
break;
|
|
case 'r'|VI_CMDMODE_BIT:
|
|
//FIXME: unicode case?
|
|
ic = lineedit_read_key(read_key_buffer, timeout);
|
|
if (errno) /* error */
|
|
goto return_error_indicator;
|
|
if (ic < ' ' || ic > 255) {
|
|
beep();
|
|
} else {
|
|
command_ps[cursor] = ic;
|
|
bb_putchar(ic);
|
|
bb_putchar('\b');
|
|
}
|
|
break;
|
|
case '\x1b': /* ESC */
|
|
if (state->flags & VI_MODE) {
|
|
/* insert mode --> command mode */
|
|
vi_cmdmode = 1;
|
|
input_backward(1);
|
|
}
|
|
break;
|
|
#endif /* FEATURE_COMMAND_EDITING_VI */
|
|
|
|
#if MAX_HISTORY > 0
|
|
case KEYCODE_UP:
|
|
if (get_previous_history())
|
|
goto rewrite_line;
|
|
beep();
|
|
break;
|
|
case KEYCODE_DOWN:
|
|
if (!get_next_history())
|
|
break;
|
|
rewrite_line:
|
|
/* Rewrite the line with the selected history item */
|
|
/* change command */
|
|
command_len = load_string(state->history[state->cur_history] ?
|
|
state->history[state->cur_history] : "", maxsize);
|
|
/* redraw and go to eol (bol, in vi) */
|
|
redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
|
|
break;
|
|
#endif
|
|
case KEYCODE_RIGHT:
|
|
input_forward();
|
|
break;
|
|
case KEYCODE_LEFT:
|
|
input_backward(1);
|
|
break;
|
|
case KEYCODE_CTRL_LEFT:
|
|
ctrl_left();
|
|
break;
|
|
case KEYCODE_CTRL_RIGHT:
|
|
ctrl_right();
|
|
break;
|
|
case KEYCODE_HOME:
|
|
input_backward(cursor);
|
|
break;
|
|
case KEYCODE_END:
|
|
put_till_end_and_adv_cursor();
|
|
break;
|
|
|
|
default:
|
|
if (initial_settings.c_cc[VINTR] != 0
|
|
&& ic_raw == initial_settings.c_cc[VINTR]
|
|
) {
|
|
/* Ctrl-C (usually) - stop gathering input */
|
|
goto_new_line();
|
|
command_len = 0;
|
|
break_out = -1; /* "do not append '\n'" */
|
|
break;
|
|
}
|
|
if (initial_settings.c_cc[VEOF] != 0
|
|
&& ic_raw == initial_settings.c_cc[VEOF]
|
|
) {
|
|
/* Ctrl-D (usually) - delete one character,
|
|
* or exit if len=0 and no chars to delete */
|
|
if (command_len == 0) {
|
|
errno = 0;
|
|
|
|
case -1: /* error (e.g. EIO when tty is destroyed) */
|
|
IF_FEATURE_EDITING_VI(return_error_indicator:)
|
|
break_out = command_len = -1;
|
|
break;
|
|
}
|
|
input_delete(0);
|
|
break;
|
|
}
|
|
// /* Control-V -- force insert of next char */
|
|
// if (c == CTRL('V')) {
|
|
// if (safe_read(STDIN_FILENO, &c, 1) < 1)
|
|
// goto return_error_indicator;
|
|
// if (c == 0) {
|
|
// beep();
|
|
// break;
|
|
// }
|
|
// }
|
|
if (ic < ' '
|
|
|| (!ENABLE_UNICODE_SUPPORT && ic >= 256)
|
|
|| (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
|
|
) {
|
|
/* If VI_CMDMODE_BIT is set, ic is >= 256
|
|
* and vi mode ignores unexpected chars.
|
|
* Otherwise, we are here if ic is a
|
|
* control char or an unhandled ESC sequence,
|
|
* which is also ignored.
|
|
*/
|
|
break;
|
|
}
|
|
if ((int)command_len >= (maxsize - 2)) {
|
|
/* Not enough space for the char and EOL */
|
|
break;
|
|
}
|
|
|
|
command_len++;
|
|
if (cursor == (command_len - 1)) {
|
|
/* We are at the end, append */
|
|
command_ps[cursor] = ic;
|
|
command_ps[cursor + 1] = BB_NUL;
|
|
put_cur_glyph_and_inc_cursor();
|
|
if (unicode_bidi_isrtl(ic))
|
|
input_backward(1);
|
|
} else {
|
|
/* In the middle, insert */
|
|
int sc = cursor;
|
|
|
|
memmove(command_ps + sc + 1, command_ps + sc,
|
|
(command_len - sc) * sizeof(command_ps[0]));
|
|
command_ps[sc] = ic;
|
|
/* is right-to-left char, or neutral one (e.g. comma) was just added to rtl text? */
|
|
if (!isrtl_str())
|
|
sc++; /* no */
|
|
put_till_end_and_adv_cursor();
|
|
/* to prev x pos + 1 */
|
|
input_backward(cursor - sc);
|
|
}
|
|
break;
|
|
} /* switch (ic) */
|
|
|
|
if (break_out)
|
|
break;
|
|
|
|
#if ENABLE_FEATURE_TAB_COMPLETION
|
|
if (ic_raw != '\t')
|
|
lastWasTab = 0;
|
|
#endif
|
|
} /* while (1) */
|
|
|
|
#if ENABLE_FEATURE_EDITING_ASK_TERMINAL
|
|
if (S.sent_ESC_br6n) {
|
|
/* "sleep 1; busybox ash" + hold [Enter] to trigger.
|
|
* We sent "ESC [ 6 n", but got '\n' first, and
|
|
* KEYCODE_CURSOR_POS response is now buffered from terminal.
|
|
* It's bad already and not much can be done with it
|
|
* (it _will_ be visible for the next process to read stdin),
|
|
* but without this delay it even shows up on the screen
|
|
* as garbage because we restore echo settings with tcsetattr
|
|
* before it comes in. UGLY!
|
|
*/
|
|
usleep(20*1000);
|
|
}
|
|
#endif
|
|
|
|
/* End of bug-catching "command_must_not_be_used" trick */
|
|
#undef command
|
|
|
|
#if ENABLE_UNICODE_SUPPORT
|
|
command[0] = '\0';
|
|
if (command_len > 0)
|
|
command_len = save_string(command, maxsize - 1);
|
|
free(command_ps);
|
|
#endif
|
|
|
|
if (command_len > 0)
|
|
remember_in_history(command);
|
|
|
|
if (break_out > 0) {
|
|
command[command_len++] = '\n';
|
|
command[command_len] = '\0';
|
|
}
|
|
|
|
#if ENABLE_FEATURE_TAB_COMPLETION
|
|
free_tab_completion_data();
|
|
#endif
|
|
|
|
/* restore initial_settings */
|
|
tcsetattr_stdin_TCSANOW(&initial_settings);
|
|
/* restore SIGWINCH handler */
|
|
signal(SIGWINCH, previous_SIGWINCH_handler);
|
|
fflush_all();
|
|
|
|
len = command_len;
|
|
DEINIT_S();
|
|
|
|
return len; /* can't return command_len, DEINIT_S() destroys it */
|
|
}
|
|
|
|
#else /* !FEATURE_EDITING */
|
|
|
|
#undef read_line_input
|
|
int FAST_FUNC read_line_input(const char* prompt, char* command, int maxsize)
|
|
{
|
|
fputs(prompt, stdout);
|
|
fflush_all();
|
|
fgets(command, maxsize, stdin);
|
|
return strlen(command);
|
|
}
|
|
|
|
#endif /* !FEATURE_EDITING */
|
|
|
|
|
|
/*
|
|
* Testing
|
|
*/
|
|
|
|
#ifdef TEST
|
|
|
|
#include <locale.h>
|
|
|
|
const char *applet_name = "debug stuff usage";
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char buff[MAX_LINELEN];
|
|
char *prompt =
|
|
#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
|
"\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
|
|
"\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
|
|
"\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
|
|
#else
|
|
"% ";
|
|
#endif
|
|
|
|
while (1) {
|
|
int l;
|
|
l = read_line_input(prompt, buff);
|
|
if (l <= 0 || buff[l-1] != '\n')
|
|
break;
|
|
buff[l-1] = '\0';
|
|
printf("*** read_line_input() returned line =%s=\n", buff);
|
|
}
|
|
printf("*** read_line_input() detect ^D\n");
|
|
return 0;
|
|
}
|
|
|
|
#endif /* TEST */
|