[1765] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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[2725] | 3 | * Command line editing.
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[1765] | 4 | *
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| 5 | * Copyright (c) 1986-2003 may safely be consumed by a BSD or GPL license.
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| 6 | * Written by: Vladimir Oleynik <dzo@simtreas.ru>
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| 7 | *
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| 8 | * Used ideas:
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| 9 | * Adam Rogoyski <rogoyski@cs.utexas.edu>
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| 10 | * Dave Cinege <dcinege@psychosis.com>
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| 11 | * Jakub Jelinek (c) 1995
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| 12 | * Erik Andersen <andersen@codepoet.org> (Majorly adjusted for busybox)
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| 13 | *
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| 14 | * This code is 'as is' with no warranty.
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| 15 | */
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| 16 |
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| 17 | /*
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[2725] | 18 | * Usage and known bugs:
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| 19 | * Terminal key codes are not extensive, more needs to be added.
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| 20 | * This version was created on Debian GNU/Linux 2.x.
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| 21 | * Delete, Backspace, Home, End, and the arrow keys were tested
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| 22 | * to work in an Xterm and console. Ctrl-A also works as Home.
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| 23 | * Ctrl-E also works as End.
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| 24 | *
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| 25 | * The following readline-like commands are not implemented:
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| 26 | * ESC-b -- Move back one word
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| 27 | * ESC-f -- Move forward one word
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| 28 | * ESC-d -- Delete forward one word
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| 29 | * CTL-t -- Transpose two characters
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| 30 | *
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| 31 | * lineedit does not know that the terminal escape sequences do not
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| 32 | * take up space on the screen. The redisplay code assumes, unless
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| 33 | * told otherwise, that each character in the prompt is a printable
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| 34 | * character that takes up one character position on the screen.
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| 35 | * You need to tell lineedit that some sequences of characters
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| 36 | * in the prompt take up no screen space. Compatibly with readline,
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| 37 | * use the \[ escape to begin a sequence of non-printing characters,
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| 38 | * and the \] escape to signal the end of such a sequence. Example:
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| 39 | *
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| 40 | * PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
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[3621] | 41 | *
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| 42 | * Unicode in PS1 is not fully supported: prompt length calulation is wrong,
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| 43 | * resulting in line wrap problems with long (multi-line) input.
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| 44 | *
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| 45 | * Multi-line PS1 (e.g. PS1="\n[\w]\n$ ") has problems with history
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| 46 | * browsing: up/down arrows result in scrolling.
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| 47 | * It stems from simplistic "cmdedit_y = cmdedit_prmt_len / cmdedit_termw"
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| 48 | * calculation of how many lines the prompt takes.
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[1765] | 49 | */
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[3621] | 50 | #include "busybox.h"
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| 51 | #include "NUM_APPLETS.h"
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[2725] | 52 | #include "unicode.h"
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[3232] | 53 | #ifndef _POSIX_VDISABLE
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| 54 | # define _POSIX_VDISABLE '\0'
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| 55 | #endif
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[1765] | 56 |
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[3232] | 57 |
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[2725] | 58 | #ifdef TEST
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| 59 | # define ENABLE_FEATURE_EDITING 0
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| 60 | # define ENABLE_FEATURE_TAB_COMPLETION 0
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| 61 | # define ENABLE_FEATURE_USERNAME_COMPLETION 0
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| 62 | #endif
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[1765] | 63 |
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| 64 |
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[2725] | 65 | /* Entire file (except TESTing part) sits inside this #if */
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| 66 | #if ENABLE_FEATURE_EDITING
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[1765] | 67 |
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| 68 |
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[2725] | 69 | #define ENABLE_USERNAME_OR_HOMEDIR \
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| 70 | (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
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| 71 | #define IF_USERNAME_OR_HOMEDIR(...)
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| 72 | #if ENABLE_USERNAME_OR_HOMEDIR
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| 73 | # undef IF_USERNAME_OR_HOMEDIR
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| 74 | # define IF_USERNAME_OR_HOMEDIR(...) __VA_ARGS__
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| 75 | #endif
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[1765] | 76 |
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| 77 |
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[2725] | 78 | #undef CHAR_T
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| 79 | #if ENABLE_UNICODE_SUPPORT
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| 80 | # define BB_NUL ((wchar_t)0)
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| 81 | # define CHAR_T wchar_t
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| 82 | static bool BB_isspace(CHAR_T c) { return ((unsigned)c < 256 && isspace(c)); }
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| 83 | # if ENABLE_FEATURE_EDITING_VI
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| 84 | static bool BB_isalnum(CHAR_T c) { return ((unsigned)c < 256 && isalnum(c)); }
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| 85 | # endif
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| 86 | static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); }
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| 87 | # undef isspace
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| 88 | # undef isalnum
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| 89 | # undef ispunct
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| 90 | # undef isprint
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| 91 | # define isspace isspace_must_not_be_used
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| 92 | # define isalnum isalnum_must_not_be_used
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| 93 | # define ispunct ispunct_must_not_be_used
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| 94 | # define isprint isprint_must_not_be_used
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| 95 | #else
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| 96 | # define BB_NUL '\0'
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| 97 | # define CHAR_T char
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| 98 | # define BB_isspace(c) isspace(c)
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| 99 | # define BB_isalnum(c) isalnum(c)
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| 100 | # define BB_ispunct(c) ispunct(c)
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| 101 | #endif
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| 102 | #if ENABLE_UNICODE_PRESERVE_BROKEN
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| 103 | # define unicode_mark_raw_byte(wc) ((wc) | 0x20000000)
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| 104 | # define unicode_is_raw_byte(wc) ((wc) & 0x20000000)
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| 105 | #else
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| 106 | # define unicode_is_raw_byte(wc) 0
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| 107 | #endif
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[1765] | 108 |
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| 109 |
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[2725] | 110 | #define ESC "\033"
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| 111 |
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| 112 | #define SEQ_CLEAR_TILL_END_OF_SCREEN ESC"[J"
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| 113 | //#define SEQ_CLEAR_TILL_END_OF_LINE ESC"[K"
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| 114 |
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| 115 |
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| 116 | enum {
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| 117 | MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0
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| 118 | ? CONFIG_FEATURE_EDITING_MAX_LEN
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| 119 | : 0x7ff0
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| 120 | };
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| 121 |
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| 122 | #if ENABLE_USERNAME_OR_HOMEDIR
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| 123 | static const char null_str[] ALIGN1 = "";
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[1765] | 124 | #endif
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| 125 |
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[2725] | 126 | /* We try to minimize both static and stack usage. */
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| 127 | struct lineedit_statics {
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| 128 | line_input_t *state;
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[1765] | 129 |
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[2725] | 130 | volatile unsigned cmdedit_termw; /* = 80; */ /* actual terminal width */
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| 131 | sighandler_t previous_SIGWINCH_handler;
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[1765] | 132 |
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[2725] | 133 | unsigned cmdedit_x; /* real x (col) terminal position */
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| 134 | unsigned cmdedit_y; /* pseudoreal y (row) terminal position */
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| 135 | unsigned cmdedit_prmt_len; /* length of prompt (without colors etc) */
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[1765] | 136 |
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[2725] | 137 | unsigned cursor;
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| 138 | int command_len; /* must be signed */
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| 139 | /* signed maxsize: we want x in "if (x > S.maxsize)"
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| 140 | * to _not_ be promoted to unsigned */
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| 141 | int maxsize;
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| 142 | CHAR_T *command_ps;
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[1765] | 143 |
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[2725] | 144 | const char *cmdedit_prompt;
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[1765] | 145 |
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[2725] | 146 | #if ENABLE_USERNAME_OR_HOMEDIR
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| 147 | char *user_buf;
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| 148 | char *home_pwd_buf; /* = (char*)null_str; */
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| 149 | #endif
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[1765] | 150 |
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[2725] | 151 | #if ENABLE_FEATURE_TAB_COMPLETION
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| 152 | char **matches;
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| 153 | unsigned num_matches;
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| 154 | #endif
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[1765] | 155 |
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[2725] | 156 | #if ENABLE_FEATURE_EDITING_VI
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| 157 | # define DELBUFSIZ 128
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| 158 | CHAR_T *delptr;
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| 159 | smallint newdelflag; /* whether delbuf should be reused yet */
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| 160 | CHAR_T delbuf[DELBUFSIZ]; /* a place to store deleted characters */
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| 161 | #endif
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| 162 | #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
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| 163 | smallint sent_ESC_br6n;
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| 164 | #endif
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| 165 | };
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| 166 |
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| 167 | /* See lineedit_ptr_hack.c */
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| 168 | extern struct lineedit_statics *const lineedit_ptr_to_statics;
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| 169 |
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| 170 | #define S (*lineedit_ptr_to_statics)
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| 171 | #define state (S.state )
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| 172 | #define cmdedit_termw (S.cmdedit_termw )
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| 173 | #define previous_SIGWINCH_handler (S.previous_SIGWINCH_handler)
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| 174 | #define cmdedit_x (S.cmdedit_x )
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| 175 | #define cmdedit_y (S.cmdedit_y )
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| 176 | #define cmdedit_prmt_len (S.cmdedit_prmt_len)
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| 177 | #define cursor (S.cursor )
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| 178 | #define command_len (S.command_len )
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| 179 | #define command_ps (S.command_ps )
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| 180 | #define cmdedit_prompt (S.cmdedit_prompt )
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| 181 | #define user_buf (S.user_buf )
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| 182 | #define home_pwd_buf (S.home_pwd_buf )
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| 183 | #define matches (S.matches )
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| 184 | #define num_matches (S.num_matches )
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| 185 | #define delptr (S.delptr )
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| 186 | #define newdelflag (S.newdelflag )
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| 187 | #define delbuf (S.delbuf )
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| 188 |
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| 189 | #define INIT_S() do { \
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| 190 | (*(struct lineedit_statics**)&lineedit_ptr_to_statics) = xzalloc(sizeof(S)); \
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| 191 | barrier(); \
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| 192 | cmdedit_termw = 80; \
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| 193 | IF_USERNAME_OR_HOMEDIR(home_pwd_buf = (char*)null_str;) \
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[3621] | 194 | IF_FEATURE_EDITING_VI(delptr = delbuf;) \
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[2725] | 195 | } while (0)
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[3232] | 196 |
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[2725] | 197 | static void deinit_S(void)
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| 198 | {
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[1765] | 199 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
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[2725] | 200 | /* This one is allocated only if FANCY_PROMPT is on
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| 201 | * (otherwise it points to verbatim prompt (NOT malloced)) */
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| 202 | free((char*)cmdedit_prompt);
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[1765] | 203 | #endif
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[2725] | 204 | #if ENABLE_USERNAME_OR_HOMEDIR
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| 205 | free(user_buf);
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| 206 | if (home_pwd_buf != null_str)
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| 207 | free(home_pwd_buf);
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| 208 | #endif
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| 209 | free(lineedit_ptr_to_statics);
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| 210 | }
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| 211 | #define DEINIT_S() deinit_S()
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[1765] | 212 |
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[2725] | 213 |
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| 214 | #if ENABLE_UNICODE_SUPPORT
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[3232] | 215 | static size_t load_string(const char *src)
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[2725] | 216 | {
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[3232] | 217 | if (unicode_status == UNICODE_ON) {
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| 218 | ssize_t len = mbstowcs(command_ps, src, S.maxsize - 1);
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| 219 | if (len < 0)
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| 220 | len = 0;
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| 221 | command_ps[len] = BB_NUL;
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| 222 | return len;
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| 223 | } else {
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| 224 | unsigned i = 0;
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| 225 | while (src[i] && i < S.maxsize - 1) {
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| 226 | command_ps[i] = src[i];
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| 227 | i++;
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| 228 | }
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| 229 | command_ps[i] = BB_NUL;
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| 230 | return i;
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| 231 | }
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[2725] | 232 | }
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| 233 | static unsigned save_string(char *dst, unsigned maxsize)
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| 234 | {
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[3232] | 235 | if (unicode_status == UNICODE_ON) {
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[2725] | 236 | # if !ENABLE_UNICODE_PRESERVE_BROKEN
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[3232] | 237 | ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
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| 238 | if (len < 0)
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| 239 | len = 0;
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| 240 | dst[len] = '\0';
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| 241 | return len;
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[2725] | 242 | # else
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[3232] | 243 | unsigned dstpos = 0;
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| 244 | unsigned srcpos = 0;
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[2725] | 245 |
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[3232] | 246 | maxsize--;
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| 247 | while (dstpos < maxsize) {
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| 248 | wchar_t wc;
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| 249 | int n = srcpos;
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[2725] | 250 |
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[3232] | 251 | /* Convert up to 1st invalid byte (or up to end) */
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| 252 | while ((wc = command_ps[srcpos]) != BB_NUL
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| 253 | && !unicode_is_raw_byte(wc)
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| 254 | ) {
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| 255 | srcpos++;
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| 256 | }
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| 257 | command_ps[srcpos] = BB_NUL;
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| 258 | n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos);
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| 259 | if (n < 0) /* should not happen */
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| 260 | break;
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| 261 | dstpos += n;
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| 262 | if (wc == BB_NUL) /* usually is */
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| 263 | break;
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| 264 |
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| 265 | /* We do have invalid byte here! */
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| 266 | command_ps[srcpos] = wc; /* restore it */
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[2725] | 267 | srcpos++;
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[3232] | 268 | if (dstpos == maxsize)
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| 269 | break;
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| 270 | dst[dstpos++] = (char) wc;
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[2725] | 271 | }
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[3232] | 272 | dst[dstpos] = '\0';
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| 273 | return dstpos;
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| 274 | # endif
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| 275 | } else {
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| 276 | unsigned i = 0;
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| 277 | while ((dst[i] = command_ps[i]) != 0)
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| 278 | i++;
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| 279 | return i;
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[2725] | 280 | }
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| 281 | }
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| 282 | /* I thought just fputwc(c, stdout) would work. But no... */
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| 283 | static void BB_PUTCHAR(wchar_t c)
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| 284 | {
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[3232] | 285 | if (unicode_status == UNICODE_ON) {
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| 286 | char buf[MB_CUR_MAX + 1];
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| 287 | mbstate_t mbst = { 0 };
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| 288 | ssize_t len = wcrtomb(buf, c, &mbst);
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| 289 | if (len > 0) {
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| 290 | buf[len] = '\0';
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| 291 | fputs(buf, stdout);
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| 292 | }
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| 293 | } else {
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| 294 | /* In this case, c is always one byte */
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| 295 | putchar(c);
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[2725] | 296 | }
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| 297 | }
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| 298 | # if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
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| 299 | static wchar_t adjust_width_and_validate_wc(unsigned *width_adj, wchar_t wc)
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| 300 | # else
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| 301 | static wchar_t adjust_width_and_validate_wc(wchar_t wc)
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| 302 | # define adjust_width_and_validate_wc(width_adj, wc) \
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| 303 | ((*(width_adj))++, adjust_width_and_validate_wc(wc))
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| 304 | # endif
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| 305 | {
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| 306 | int w = 1;
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| 307 |
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| 308 | if (unicode_status == UNICODE_ON) {
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| 309 | if (wc > CONFIG_LAST_SUPPORTED_WCHAR) {
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| 310 | /* note: also true for unicode_is_raw_byte(wc) */
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| 311 | goto subst;
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| 312 | }
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| 313 | w = wcwidth(wc);
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| 314 | if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0)
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| 315 | || (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0)
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| 316 | || (!ENABLE_UNICODE_WIDE_WCHARS && w > 1)
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| 317 | ) {
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| 318 | subst:
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| 319 | w = 1;
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| 320 | wc = CONFIG_SUBST_WCHAR;
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| 321 | }
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| 322 | }
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| 323 |
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| 324 | # if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
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| 325 | *width_adj += w;
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[1765] | 326 | #endif
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[2725] | 327 | return wc;
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| 328 | }
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| 329 | #else /* !UNICODE */
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[3232] | 330 | static size_t load_string(const char *src)
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[2725] | 331 | {
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[3232] | 332 | safe_strncpy(command_ps, src, S.maxsize);
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[2725] | 333 | return strlen(command_ps);
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| 334 | }
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| 335 | # if ENABLE_FEATURE_TAB_COMPLETION
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| 336 | static void save_string(char *dst, unsigned maxsize)
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| 337 | {
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| 338 | safe_strncpy(dst, command_ps, maxsize);
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| 339 | }
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| 340 | # endif
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| 341 | # define BB_PUTCHAR(c) bb_putchar(c)
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| 342 | /* Should never be called: */
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| 343 | int adjust_width_and_validate_wc(unsigned *width_adj, int wc);
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| 344 | #endif
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[1765] | 345 |
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[2725] | 346 |
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[1765] | 347 | /* Put 'command_ps[cursor]', cursor++.
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| 348 | * Advance cursor on screen. If we reached right margin, scroll text up
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| 349 | * and remove terminal margin effect by printing 'next_char' */
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[2725] | 350 | #define HACK_FOR_WRONG_WIDTH 1
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| 351 | static void put_cur_glyph_and_inc_cursor(void)
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[1765] | 352 | {
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[2725] | 353 | CHAR_T c = command_ps[cursor];
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| 354 | unsigned width = 0;
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| 355 | int ofs_to_right;
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[1765] | 356 |
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[2725] | 357 | if (c == BB_NUL) {
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[1765] | 358 | /* erase character after end of input string */
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| 359 | c = ' ';
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[2725] | 360 | } else {
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| 361 | /* advance cursor only if we aren't at the end yet */
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| 362 | cursor++;
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| 363 | if (unicode_status == UNICODE_ON) {
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| 364 | IF_UNICODE_WIDE_WCHARS(width = cmdedit_x;)
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| 365 | c = adjust_width_and_validate_wc(&cmdedit_x, c);
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| 366 | IF_UNICODE_WIDE_WCHARS(width = cmdedit_x - width;)
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| 367 | } else {
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| 368 | cmdedit_x++;
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| 369 | }
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[1765] | 370 | }
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[2725] | 371 |
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| 372 | ofs_to_right = cmdedit_x - cmdedit_termw;
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| 373 | if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right <= 0) {
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| 374 | /* c fits on this line */
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| 375 | BB_PUTCHAR(c);
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| 376 | }
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| 377 |
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| 378 | if (ofs_to_right >= 0) {
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| 379 | /* we go to the next line */
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| 380 | #if HACK_FOR_WRONG_WIDTH
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| 381 | /* This works better if our idea of term width is wrong
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| 382 | * and it is actually wider (often happens on serial lines).
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| 383 | * Printing CR,LF *forces* cursor to next line.
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| 384 | * OTOH if terminal width is correct AND terminal does NOT
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| 385 | * have automargin (IOW: it is moving cursor to next line
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| 386 | * by itself (which is wrong for VT-10x terminals)),
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| 387 | * this will break things: there will be one extra empty line */
|
---|
| 388 | puts("\r"); /* + implicit '\n' */
|
---|
| 389 | #else
|
---|
| 390 | /* VT-10x terminals don't wrap cursor to next line when last char
|
---|
| 391 | * on the line is printed - cursor stays "over" this char.
|
---|
| 392 | * Need to print _next_ char too (first one to appear on next line)
|
---|
| 393 | * to make cursor move down to next line.
|
---|
| 394 | */
|
---|
| 395 | /* Works ok only if cmdedit_termw is correct. */
|
---|
| 396 | c = command_ps[cursor];
|
---|
| 397 | if (c == BB_NUL)
|
---|
| 398 | c = ' ';
|
---|
| 399 | BB_PUTCHAR(c);
|
---|
| 400 | bb_putchar('\b');
|
---|
[1765] | 401 | #endif
|
---|
| 402 | cmdedit_y++;
|
---|
[2725] | 403 | if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right == 0) {
|
---|
| 404 | width = 0;
|
---|
| 405 | } else { /* ofs_to_right > 0 */
|
---|
| 406 | /* wide char c didn't fit on prev line */
|
---|
| 407 | BB_PUTCHAR(c);
|
---|
| 408 | }
|
---|
| 409 | cmdedit_x = width;
|
---|
[1765] | 410 | }
|
---|
| 411 | }
|
---|
| 412 |
|
---|
| 413 | /* Move to end of line (by printing all chars till the end) */
|
---|
[2725] | 414 | static void put_till_end_and_adv_cursor(void)
|
---|
[1765] | 415 | {
|
---|
| 416 | while (cursor < command_len)
|
---|
[2725] | 417 | put_cur_glyph_and_inc_cursor();
|
---|
[1765] | 418 | }
|
---|
| 419 |
|
---|
| 420 | /* Go to the next line */
|
---|
| 421 | static void goto_new_line(void)
|
---|
| 422 | {
|
---|
[2725] | 423 | put_till_end_and_adv_cursor();
|
---|
| 424 | if (cmdedit_x != 0)
|
---|
| 425 | bb_putchar('\n');
|
---|
[1765] | 426 | }
|
---|
| 427 |
|
---|
[2725] | 428 | static void beep(void)
|
---|
[1765] | 429 | {
|
---|
[2725] | 430 | bb_putchar('\007');
|
---|
[1765] | 431 | }
|
---|
| 432 |
|
---|
[2725] | 433 | static void put_prompt(void)
|
---|
[1765] | 434 | {
|
---|
[2725] | 435 | unsigned w;
|
---|
| 436 |
|
---|
| 437 | fputs(cmdedit_prompt, stdout);
|
---|
| 438 | fflush_all();
|
---|
| 439 | cursor = 0;
|
---|
| 440 | w = cmdedit_termw; /* read volatile var once */
|
---|
| 441 | cmdedit_y = cmdedit_prmt_len / w; /* new quasireal y */
|
---|
| 442 | cmdedit_x = cmdedit_prmt_len % w;
|
---|
[1765] | 443 | }
|
---|
| 444 |
|
---|
| 445 | /* Move back one character */
|
---|
| 446 | /* (optimized for slow terminals) */
|
---|
| 447 | static void input_backward(unsigned num)
|
---|
| 448 | {
|
---|
| 449 | if (num > cursor)
|
---|
| 450 | num = cursor;
|
---|
[2725] | 451 | if (num == 0)
|
---|
[1765] | 452 | return;
|
---|
| 453 | cursor -= num;
|
---|
| 454 |
|
---|
[2725] | 455 | if ((ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS)
|
---|
| 456 | && unicode_status == UNICODE_ON
|
---|
| 457 | ) {
|
---|
| 458 | /* correct NUM to be equal to _screen_ width */
|
---|
| 459 | int n = num;
|
---|
| 460 | num = 0;
|
---|
| 461 | while (--n >= 0)
|
---|
| 462 | adjust_width_and_validate_wc(&num, command_ps[cursor + n]);
|
---|
| 463 | if (num == 0)
|
---|
| 464 | return;
|
---|
| 465 | }
|
---|
| 466 |
|
---|
[1765] | 467 | if (cmdedit_x >= num) {
|
---|
| 468 | cmdedit_x -= num;
|
---|
| 469 | if (num <= 4) {
|
---|
[2725] | 470 | /* This is longer by 5 bytes on x86.
|
---|
| 471 | * Also gets miscompiled for ARM users
|
---|
| 472 | * (busybox.net/bugs/view.php?id=2274).
|
---|
| 473 | * printf(("\b\b\b\b" + 4) - num);
|
---|
| 474 | * return;
|
---|
| 475 | */
|
---|
| 476 | do {
|
---|
| 477 | bb_putchar('\b');
|
---|
| 478 | } while (--num);
|
---|
[1765] | 479 | return;
|
---|
| 480 | }
|
---|
[2725] | 481 | printf(ESC"[%uD", num);
|
---|
[1765] | 482 | return;
|
---|
| 483 | }
|
---|
| 484 |
|
---|
| 485 | /* Need to go one or more lines up */
|
---|
[2725] | 486 | if (ENABLE_UNICODE_WIDE_WCHARS) {
|
---|
| 487 | /* With wide chars, it is hard to "backtrack"
|
---|
| 488 | * and reliably figure out where to put cursor.
|
---|
| 489 | * Example (<> is a wide char; # is an ordinary char, _ cursor):
|
---|
| 490 | * |prompt: <><> |
|
---|
| 491 | * |<><><><><><> |
|
---|
| 492 | * |_ |
|
---|
| 493 | * and user presses left arrow. num = 1, cmdedit_x = 0,
|
---|
| 494 | * We need to go up one line, and then - how do we know that
|
---|
| 495 | * we need to go *10* positions to the right? Because
|
---|
| 496 | * |prompt: <>#<>|
|
---|
| 497 | * |<><><>#<><><>|
|
---|
| 498 | * |_ |
|
---|
| 499 | * in this situation we need to go *11* positions to the right.
|
---|
| 500 | *
|
---|
| 501 | * A simpler thing to do is to redraw everything from the start
|
---|
| 502 | * up to new cursor position (which is already known):
|
---|
| 503 | */
|
---|
| 504 | unsigned sv_cursor;
|
---|
| 505 | /* go to 1st column; go up to first line */
|
---|
| 506 | printf("\r" ESC"[%uA", cmdedit_y);
|
---|
| 507 | cmdedit_y = 0;
|
---|
| 508 | sv_cursor = cursor;
|
---|
| 509 | put_prompt(); /* sets cursor to 0 */
|
---|
| 510 | while (cursor < sv_cursor)
|
---|
| 511 | put_cur_glyph_and_inc_cursor();
|
---|
| 512 | } else {
|
---|
| 513 | int lines_up;
|
---|
| 514 | unsigned width;
|
---|
| 515 | /* num = chars to go back from the beginning of current line: */
|
---|
| 516 | num -= cmdedit_x;
|
---|
| 517 | width = cmdedit_termw; /* read volatile var once */
|
---|
| 518 | /* num=1...w: one line up, w+1...2w: two, etc: */
|
---|
| 519 | lines_up = 1 + (num - 1) / width;
|
---|
| 520 | cmdedit_x = (width * cmdedit_y - num) % width;
|
---|
| 521 | cmdedit_y -= lines_up;
|
---|
| 522 | /* go to 1st column; go up */
|
---|
| 523 | printf("\r" ESC"[%uA", lines_up);
|
---|
| 524 | /* go to correct column.
|
---|
| 525 | * xterm, konsole, Linux VT interpret 0 as 1 below! wow.
|
---|
| 526 | * need to *make sure* we skip it if cmdedit_x == 0 */
|
---|
| 527 | if (cmdedit_x)
|
---|
| 528 | printf(ESC"[%uC", cmdedit_x);
|
---|
| 529 | }
|
---|
[1765] | 530 | }
|
---|
| 531 |
|
---|
| 532 | /* draw prompt, editor line, and clear tail */
|
---|
| 533 | static void redraw(int y, int back_cursor)
|
---|
| 534 | {
|
---|
[2725] | 535 | if (y > 0) /* up y lines */
|
---|
| 536 | printf(ESC"[%uA", y);
|
---|
| 537 | bb_putchar('\r');
|
---|
[1765] | 538 | put_prompt();
|
---|
[2725] | 539 | put_till_end_and_adv_cursor();
|
---|
| 540 | printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
|
---|
[1765] | 541 | input_backward(back_cursor);
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | /* Delete the char in front of the cursor, optionally saving it
|
---|
| 545 | * for later putback */
|
---|
[2725] | 546 | #if !ENABLE_FEATURE_EDITING_VI
|
---|
| 547 | static void input_delete(void)
|
---|
| 548 | #define input_delete(save) input_delete()
|
---|
| 549 | #else
|
---|
[1765] | 550 | static void input_delete(int save)
|
---|
[2725] | 551 | #endif
|
---|
[1765] | 552 | {
|
---|
| 553 | int j = cursor;
|
---|
| 554 |
|
---|
[2725] | 555 | if (j == (int)command_len)
|
---|
[1765] | 556 | return;
|
---|
| 557 |
|
---|
| 558 | #if ENABLE_FEATURE_EDITING_VI
|
---|
| 559 | if (save) {
|
---|
| 560 | if (newdelflag) {
|
---|
[2725] | 561 | delptr = delbuf;
|
---|
[1765] | 562 | newdelflag = 0;
|
---|
| 563 | }
|
---|
[2725] | 564 | if ((delptr - delbuf) < DELBUFSIZ)
|
---|
| 565 | *delptr++ = command_ps[j];
|
---|
[1765] | 566 | }
|
---|
| 567 | #endif
|
---|
| 568 |
|
---|
[2725] | 569 | memmove(command_ps + j, command_ps + j + 1,
|
---|
| 570 | /* (command_len + 1 [because of NUL]) - (j + 1)
|
---|
| 571 | * simplified into (command_len - j) */
|
---|
| 572 | (command_len - j) * sizeof(command_ps[0]));
|
---|
[1765] | 573 | command_len--;
|
---|
[2725] | 574 | put_till_end_and_adv_cursor();
|
---|
| 575 | /* Last char is still visible, erase it (and more) */
|
---|
| 576 | printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
|
---|
[1765] | 577 | input_backward(cursor - j); /* back to old pos cursor */
|
---|
| 578 | }
|
---|
| 579 |
|
---|
| 580 | #if ENABLE_FEATURE_EDITING_VI
|
---|
| 581 | static void put(void)
|
---|
| 582 | {
|
---|
| 583 | int ocursor;
|
---|
[2725] | 584 | int j = delptr - delbuf;
|
---|
[1765] | 585 |
|
---|
| 586 | if (j == 0)
|
---|
| 587 | return;
|
---|
| 588 | ocursor = cursor;
|
---|
| 589 | /* open hole and then fill it */
|
---|
[2725] | 590 | memmove(command_ps + cursor + j, command_ps + cursor,
|
---|
| 591 | (command_len - cursor + 1) * sizeof(command_ps[0]));
|
---|
| 592 | memcpy(command_ps + cursor, delbuf, j * sizeof(command_ps[0]));
|
---|
[1765] | 593 | command_len += j;
|
---|
[2725] | 594 | put_till_end_and_adv_cursor();
|
---|
[1765] | 595 | input_backward(cursor - ocursor - j + 1); /* at end of new text */
|
---|
| 596 | }
|
---|
| 597 | #endif
|
---|
| 598 |
|
---|
| 599 | /* Delete the char in back of the cursor */
|
---|
| 600 | static void input_backspace(void)
|
---|
| 601 | {
|
---|
| 602 | if (cursor > 0) {
|
---|
| 603 | input_backward(1);
|
---|
| 604 | input_delete(0);
|
---|
| 605 | }
|
---|
| 606 | }
|
---|
| 607 |
|
---|
| 608 | /* Move forward one character */
|
---|
| 609 | static void input_forward(void)
|
---|
| 610 | {
|
---|
| 611 | if (cursor < command_len)
|
---|
[2725] | 612 | put_cur_glyph_and_inc_cursor();
|
---|
[1765] | 613 | }
|
---|
| 614 |
|
---|
| 615 | #if ENABLE_FEATURE_TAB_COMPLETION
|
---|
| 616 |
|
---|
[2725] | 617 | //FIXME:
|
---|
| 618 | //needs to be more clever: currently it thinks that "foo\ b<TAB>
|
---|
| 619 | //matches the file named "foo bar", which is untrue.
|
---|
| 620 | //Also, perhaps "foo b<TAB> needs to complete to "foo bar" <cursor>,
|
---|
| 621 | //not "foo bar <cursor>...
|
---|
[1765] | 622 |
|
---|
| 623 | static void free_tab_completion_data(void)
|
---|
| 624 | {
|
---|
| 625 | if (matches) {
|
---|
| 626 | while (num_matches)
|
---|
| 627 | free(matches[--num_matches]);
|
---|
| 628 | free(matches);
|
---|
| 629 | matches = NULL;
|
---|
| 630 | }
|
---|
| 631 | }
|
---|
| 632 |
|
---|
| 633 | static void add_match(char *matched)
|
---|
| 634 | {
|
---|
[2725] | 635 | matches = xrealloc_vector(matches, 4, num_matches);
|
---|
| 636 | matches[num_matches] = matched;
|
---|
[1765] | 637 | num_matches++;
|
---|
| 638 | }
|
---|
| 639 |
|
---|
[2725] | 640 | # if ENABLE_FEATURE_USERNAME_COMPLETION
|
---|
| 641 | /* Replace "~user/..." with "/homedir/...".
|
---|
| 642 | * The parameter is malloced, free it or return it
|
---|
| 643 | * unchanged if no user is matched.
|
---|
| 644 | */
|
---|
| 645 | static char *username_path_completion(char *ud)
|
---|
[1765] | 646 | {
|
---|
| 647 | struct passwd *entry;
|
---|
[2725] | 648 | char *tilde_name = ud;
|
---|
| 649 | char *home = NULL;
|
---|
[1765] | 650 |
|
---|
[2725] | 651 | ud++; /* skip ~ */
|
---|
| 652 | if (*ud == '/') { /* "~/..." */
|
---|
| 653 | home = home_pwd_buf;
|
---|
| 654 | } else {
|
---|
| 655 | /* "~user/..." */
|
---|
| 656 | ud = strchr(ud, '/');
|
---|
| 657 | *ud = '\0'; /* "~user" */
|
---|
| 658 | entry = getpwnam(tilde_name + 1);
|
---|
| 659 | *ud = '/'; /* restore "~user/..." */
|
---|
| 660 | if (entry)
|
---|
| 661 | home = entry->pw_dir;
|
---|
| 662 | }
|
---|
| 663 | if (home) {
|
---|
| 664 | ud = concat_path_file(home, ud);
|
---|
| 665 | free(tilde_name);
|
---|
| 666 | tilde_name = ud;
|
---|
| 667 | }
|
---|
| 668 | return tilde_name;
|
---|
| 669 | }
|
---|
[1765] | 670 |
|
---|
[2725] | 671 | /* ~use<tab> - find all users with this prefix.
|
---|
| 672 | * Return the length of the prefix used for matching.
|
---|
| 673 | */
|
---|
| 674 | static NOINLINE unsigned complete_username(const char *ud)
|
---|
| 675 | {
|
---|
[3621] | 676 | struct passwd *pw;
|
---|
[2725] | 677 | unsigned userlen;
|
---|
[1765] | 678 |
|
---|
[2725] | 679 | ud++; /* skip ~ */
|
---|
| 680 | userlen = strlen(ud);
|
---|
[1765] | 681 |
|
---|
[2725] | 682 | setpwent();
|
---|
[3621] | 683 | while ((pw = getpwent()) != NULL) {
|
---|
[2725] | 684 | /* Null usernames should result in all users as possible completions. */
|
---|
[3621] | 685 | if (/* !ud[0] || */ is_prefixed_with(pw->pw_name, ud)) {
|
---|
| 686 | add_match(xasprintf("~%s/", pw->pw_name));
|
---|
[1765] | 687 | }
|
---|
[2725] | 688 | }
|
---|
[3621] | 689 | endpwent(); /* don't keep password file open */
|
---|
[1765] | 690 |
|
---|
[2725] | 691 | return 1 + userlen;
|
---|
[1765] | 692 | }
|
---|
[2725] | 693 | # endif /* FEATURE_USERNAME_COMPLETION */
|
---|
[1765] | 694 |
|
---|
| 695 | enum {
|
---|
| 696 | FIND_EXE_ONLY = 0,
|
---|
| 697 | FIND_DIR_ONLY = 1,
|
---|
| 698 | FIND_FILE_ONLY = 2,
|
---|
| 699 | };
|
---|
| 700 |
|
---|
[2725] | 701 | static int path_parse(char ***p)
|
---|
[1765] | 702 | {
|
---|
| 703 | int npth;
|
---|
| 704 | const char *pth;
|
---|
| 705 | char *tmp;
|
---|
| 706 | char **res;
|
---|
| 707 |
|
---|
| 708 | if (state->flags & WITH_PATH_LOOKUP)
|
---|
| 709 | pth = state->path_lookup;
|
---|
| 710 | else
|
---|
| 711 | pth = getenv("PATH");
|
---|
[2725] | 712 |
|
---|
| 713 | /* PATH="" or PATH=":"? */
|
---|
[1765] | 714 | if (!pth || !pth[0] || LONE_CHAR(pth, ':'))
|
---|
| 715 | return 1;
|
---|
| 716 |
|
---|
| 717 | tmp = (char*)pth;
|
---|
| 718 | npth = 1; /* path component count */
|
---|
| 719 | while (1) {
|
---|
| 720 | tmp = strchr(tmp, ':');
|
---|
| 721 | if (!tmp)
|
---|
| 722 | break;
|
---|
[2725] | 723 | tmp++;
|
---|
| 724 | if (*tmp == '\0')
|
---|
[1765] | 725 | break; /* :<empty> */
|
---|
| 726 | npth++;
|
---|
| 727 | }
|
---|
| 728 |
|
---|
[2725] | 729 | *p = res = xmalloc(npth * sizeof(res[0]));
|
---|
[1765] | 730 | res[0] = tmp = xstrdup(pth);
|
---|
| 731 | npth = 1;
|
---|
| 732 | while (1) {
|
---|
| 733 | tmp = strchr(tmp, ':');
|
---|
| 734 | if (!tmp)
|
---|
| 735 | break;
|
---|
| 736 | *tmp++ = '\0'; /* ':' -> '\0' */
|
---|
| 737 | if (*tmp == '\0')
|
---|
| 738 | break; /* :<empty> */
|
---|
| 739 | res[npth++] = tmp;
|
---|
| 740 | }
|
---|
| 741 | return npth;
|
---|
| 742 | }
|
---|
| 743 |
|
---|
[2725] | 744 | /* Complete command, directory or file name.
|
---|
| 745 | * Return the length of the prefix used for matching.
|
---|
| 746 | */
|
---|
| 747 | static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
|
---|
[1765] | 748 | {
|
---|
| 749 | char *path1[1];
|
---|
| 750 | char **paths = path1;
|
---|
| 751 | int npaths;
|
---|
| 752 | int i;
|
---|
[2725] | 753 | unsigned pf_len;
|
---|
| 754 | const char *pfind;
|
---|
| 755 | char *dirbuf = NULL;
|
---|
[1765] | 756 |
|
---|
| 757 | npaths = 1;
|
---|
| 758 | path1[0] = (char*)".";
|
---|
| 759 |
|
---|
[2725] | 760 | pfind = strrchr(command, '/');
|
---|
| 761 | if (!pfind) {
|
---|
| 762 | if (type == FIND_EXE_ONLY)
|
---|
| 763 | npaths = path_parse(&paths);
|
---|
[1765] | 764 | pfind = command;
|
---|
| 765 | } else {
|
---|
[2725] | 766 | /* point to 'l' in "..../last_component" */
|
---|
| 767 | pfind++;
|
---|
[1765] | 768 | /* dirbuf = ".../.../.../" */
|
---|
[2725] | 769 | dirbuf = xstrndup(command, pfind - command);
|
---|
| 770 | # if ENABLE_FEATURE_USERNAME_COMPLETION
|
---|
[1765] | 771 | if (dirbuf[0] == '~') /* ~/... or ~user/... */
|
---|
[2725] | 772 | dirbuf = username_path_completion(dirbuf);
|
---|
| 773 | # endif
|
---|
| 774 | path1[0] = dirbuf;
|
---|
[1765] | 775 | }
|
---|
[2725] | 776 | pf_len = strlen(pfind);
|
---|
[1765] | 777 |
|
---|
[3621] | 778 | #if ENABLE_FEATURE_SH_STANDALONE && NUM_APPLETS != 1
|
---|
| 779 | if (type == FIND_EXE_ONLY) {
|
---|
| 780 | const char *p = applet_names;
|
---|
| 781 |
|
---|
| 782 | while (*p) {
|
---|
| 783 | if (strncmp(pfind, p, pf_len) == 0)
|
---|
| 784 | add_match(xstrdup(p));
|
---|
| 785 | while (*p++ != '\0')
|
---|
| 786 | continue;
|
---|
| 787 | }
|
---|
| 788 | }
|
---|
| 789 | #endif
|
---|
| 790 |
|
---|
[1765] | 791 | for (i = 0; i < npaths; i++) {
|
---|
[2725] | 792 | DIR *dir;
|
---|
| 793 | struct dirent *next;
|
---|
| 794 | struct stat st;
|
---|
| 795 | char *found;
|
---|
| 796 |
|
---|
[1765] | 797 | dir = opendir(paths[i]);
|
---|
[2725] | 798 | if (!dir)
|
---|
| 799 | continue; /* don't print an error */
|
---|
[1765] | 800 |
|
---|
| 801 | while ((next = readdir(dir)) != NULL) {
|
---|
[2725] | 802 | unsigned len;
|
---|
| 803 | const char *name_found = next->d_name;
|
---|
[1765] | 804 |
|
---|
[2725] | 805 | /* .../<tab>: bash 3.2.0 shows dotfiles, but not . and .. */
|
---|
| 806 | if (!pfind[0] && DOT_OR_DOTDOT(name_found))
|
---|
[1765] | 807 | continue;
|
---|
[2725] | 808 | /* match? */
|
---|
[3621] | 809 | if (!is_prefixed_with(name_found, pfind))
|
---|
[2725] | 810 | continue; /* no */
|
---|
[1765] | 811 |
|
---|
[2725] | 812 | found = concat_path_file(paths[i], name_found);
|
---|
| 813 | /* NB: stat() first so that we see is it a directory;
|
---|
| 814 | * but if that fails, use lstat() so that
|
---|
| 815 | * we still match dangling links */
|
---|
| 816 | if (stat(found, &st) && lstat(found, &st))
|
---|
| 817 | goto cont; /* hmm, remove in progress? */
|
---|
[1765] | 818 |
|
---|
[2725] | 819 | /* Save only name */
|
---|
| 820 | len = strlen(name_found);
|
---|
| 821 | found = xrealloc(found, len + 2); /* +2: for slash and NUL */
|
---|
| 822 | strcpy(found, name_found);
|
---|
| 823 |
|
---|
[1765] | 824 | if (S_ISDIR(st.st_mode)) {
|
---|
[2725] | 825 | /* name is a directory, add slash */
|
---|
| 826 | found[len] = '/';
|
---|
| 827 | found[len + 1] = '\0';
|
---|
[1765] | 828 | } else {
|
---|
[2725] | 829 | /* skip files if looking for dirs only (example: cd) */
|
---|
[1765] | 830 | if (type == FIND_DIR_ONLY)
|
---|
| 831 | goto cont;
|
---|
| 832 | }
|
---|
[2725] | 833 | /* add it to the list */
|
---|
[1765] | 834 | add_match(found);
|
---|
| 835 | continue;
|
---|
| 836 | cont:
|
---|
| 837 | free(found);
|
---|
| 838 | }
|
---|
| 839 | closedir(dir);
|
---|
[2725] | 840 | } /* for every path */
|
---|
| 841 |
|
---|
[1765] | 842 | if (paths != path1) {
|
---|
[2725] | 843 | free(paths[0]); /* allocated memory is only in first member */
|
---|
[1765] | 844 | free(paths);
|
---|
| 845 | }
|
---|
[2725] | 846 | free(dirbuf);
|
---|
| 847 |
|
---|
| 848 | return pf_len;
|
---|
[1765] | 849 | }
|
---|
| 850 |
|
---|
[2725] | 851 | /* build_match_prefix:
|
---|
| 852 | * On entry, match_buf contains everything up to cursor at the moment <tab>
|
---|
| 853 | * was pressed. This function looks at it, figures out what part of it
|
---|
| 854 | * constitutes the command/file/directory prefix to use for completion,
|
---|
| 855 | * and rewrites match_buf to contain only that part.
|
---|
| 856 | */
|
---|
| 857 | #define dbg_bmp 0
|
---|
| 858 | /* Helpers: */
|
---|
| 859 | /* QUOT is used on elements of int_buf[], which are bytes,
|
---|
| 860 | * not Unicode chars. Therefore it works correctly even in Unicode mode.
|
---|
| 861 | */
|
---|
[1765] | 862 | #define QUOT (UCHAR_MAX+1)
|
---|
[2725] | 863 | static void remove_chunk(int16_t *int_buf, int beg, int end)
|
---|
| 864 | {
|
---|
| 865 | /* beg must be <= end */
|
---|
| 866 | if (beg == end)
|
---|
| 867 | return;
|
---|
[1765] | 868 |
|
---|
[2725] | 869 | while ((int_buf[beg] = int_buf[end]) != 0)
|
---|
| 870 | beg++, end++;
|
---|
[1765] | 871 |
|
---|
[2725] | 872 | if (dbg_bmp) {
|
---|
| 873 | int i;
|
---|
| 874 | for (i = 0; int_buf[i]; i++)
|
---|
| 875 | bb_putchar((unsigned char)int_buf[i]);
|
---|
| 876 | bb_putchar('\n');
|
---|
| 877 | }
|
---|
| 878 | }
|
---|
| 879 | /* Caller ensures that match_buf points to a malloced buffer
|
---|
| 880 | * big enough to hold strlen(match_buf)*2 + 2
|
---|
| 881 | */
|
---|
| 882 | static NOINLINE int build_match_prefix(char *match_buf)
|
---|
[1765] | 883 | {
|
---|
| 884 | int i, j;
|
---|
| 885 | int command_mode;
|
---|
[2725] | 886 | int16_t *int_buf = (int16_t*)match_buf;
|
---|
[1765] | 887 |
|
---|
[2725] | 888 | if (dbg_bmp) printf("\n%s\n", match_buf);
|
---|
| 889 |
|
---|
| 890 | /* Copy in reverse order, since they overlap */
|
---|
| 891 | i = strlen(match_buf);
|
---|
| 892 | do {
|
---|
| 893 | int_buf[i] = (unsigned char)match_buf[i];
|
---|
| 894 | i--;
|
---|
| 895 | } while (i >= 0);
|
---|
| 896 |
|
---|
| 897 | /* Mark every \c as "quoted c" */
|
---|
| 898 | for (i = 0; int_buf[i]; i++) {
|
---|
| 899 | if (int_buf[i] == '\\') {
|
---|
| 900 | remove_chunk(int_buf, i, i + 1);
|
---|
| 901 | int_buf[i] |= QUOT;
|
---|
[1765] | 902 | }
|
---|
| 903 | }
|
---|
[2725] | 904 | /* Quote-mark "chars" and 'chars', drop delimiters */
|
---|
| 905 | {
|
---|
| 906 | int in_quote = 0;
|
---|
| 907 | i = 0;
|
---|
| 908 | while (int_buf[i]) {
|
---|
| 909 | int cur = int_buf[i];
|
---|
| 910 | if (!cur)
|
---|
| 911 | break;
|
---|
| 912 | if (cur == '\'' || cur == '"') {
|
---|
| 913 | if (!in_quote || (cur == in_quote)) {
|
---|
| 914 | in_quote ^= cur;
|
---|
| 915 | remove_chunk(int_buf, i, i + 1);
|
---|
| 916 | continue;
|
---|
| 917 | }
|
---|
| 918 | }
|
---|
| 919 | if (in_quote)
|
---|
| 920 | int_buf[i] = cur | QUOT;
|
---|
[1765] | 921 | i++;
|
---|
| 922 | }
|
---|
[2725] | 923 | }
|
---|
[1765] | 924 |
|
---|
[2725] | 925 | /* Remove everything up to command delimiters:
|
---|
| 926 | * ';' ';;' '&' '|' '&&' '||',
|
---|
| 927 | * but careful with '>&' '<&' '>|'
|
---|
| 928 | */
|
---|
[1765] | 929 | for (i = 0; int_buf[i]; i++) {
|
---|
[2725] | 930 | int cur = int_buf[i];
|
---|
| 931 | if (cur == ';' || cur == '&' || cur == '|') {
|
---|
| 932 | int prev = i ? int_buf[i - 1] : 0;
|
---|
| 933 | if (cur == '&' && (prev == '>' || prev == '<')) {
|
---|
| 934 | continue;
|
---|
| 935 | } else if (cur == '|' && prev == '>') {
|
---|
| 936 | continue;
|
---|
[1765] | 937 | }
|
---|
[2725] | 938 | remove_chunk(int_buf, 0, i + 1 + (cur == int_buf[i + 1]));
|
---|
| 939 | i = -1; /* back to square 1 */
|
---|
| 940 | }
|
---|
[1765] | 941 | }
|
---|
[2725] | 942 | /* Remove all `cmd` */
|
---|
[1765] | 943 | for (i = 0; int_buf[i]; i++) {
|
---|
| 944 | if (int_buf[i] == '`') {
|
---|
[2725] | 945 | for (j = i + 1; int_buf[j]; j++) {
|
---|
[1765] | 946 | if (int_buf[j] == '`') {
|
---|
[2725] | 947 | /* `cmd` should count as a word:
|
---|
| 948 | * `cmd` c<tab> should search for files c*,
|
---|
| 949 | * not commands c*. Therefore we don't drop
|
---|
| 950 | * `cmd` entirely, we replace it with single `.
|
---|
| 951 | */
|
---|
| 952 | remove_chunk(int_buf, i, j);
|
---|
| 953 | goto next;
|
---|
[1765] | 954 | }
|
---|
[2725] | 955 | }
|
---|
| 956 | /* No closing ` - command mode, remove all up to ` */
|
---|
| 957 | remove_chunk(int_buf, 0, i + 1);
|
---|
| 958 | break;
|
---|
| 959 | next: ;
|
---|
[1765] | 960 | }
|
---|
[2725] | 961 | }
|
---|
[1765] | 962 |
|
---|
[2725] | 963 | /* Remove "cmd (" and "cmd {"
|
---|
| 964 | * Example: "if { c<tab>"
|
---|
| 965 | * In this example, c should be matched as command pfx.
|
---|
| 966 | */
|
---|
| 967 | for (i = 0; int_buf[i]; i++) {
|
---|
[1765] | 968 | if (int_buf[i] == '(' || int_buf[i] == '{') {
|
---|
[2725] | 969 | remove_chunk(int_buf, 0, i + 1);
|
---|
| 970 | i = -1; /* back to square 1 */
|
---|
[1765] | 971 | }
|
---|
[2725] | 972 | }
|
---|
[1765] | 973 |
|
---|
[2725] | 974 | /* Remove leading unquoted spaces */
|
---|
[1765] | 975 | for (i = 0; int_buf[i]; i++)
|
---|
| 976 | if (int_buf[i] != ' ')
|
---|
| 977 | break;
|
---|
[2725] | 978 | remove_chunk(int_buf, 0, i);
|
---|
[1765] | 979 |
|
---|
[2725] | 980 | /* Determine completion mode */
|
---|
[1765] | 981 | command_mode = FIND_EXE_ONLY;
|
---|
[2725] | 982 | for (i = 0; int_buf[i]; i++) {
|
---|
[1765] | 983 | if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
|
---|
[2725] | 984 | if (int_buf[i] == ' '
|
---|
| 985 | && command_mode == FIND_EXE_ONLY
|
---|
| 986 | && (char)int_buf[0] == 'c'
|
---|
| 987 | && (char)int_buf[1] == 'd'
|
---|
| 988 | && i == 2 /* -> int_buf[2] == ' ' */
|
---|
[1765] | 989 | ) {
|
---|
| 990 | command_mode = FIND_DIR_ONLY;
|
---|
| 991 | } else {
|
---|
| 992 | command_mode = FIND_FILE_ONLY;
|
---|
| 993 | break;
|
---|
| 994 | }
|
---|
| 995 | }
|
---|
[2725] | 996 | }
|
---|
| 997 | if (dbg_bmp) printf("command_mode(0:exe/1:dir/2:file):%d\n", command_mode);
|
---|
| 998 |
|
---|
| 999 | /* Remove everything except last word */
|
---|
| 1000 | for (i = 0; int_buf[i]; i++) /* quasi-strlen(int_buf) */
|
---|
| 1001 | continue;
|
---|
[1765] | 1002 | for (--i; i >= 0; i--) {
|
---|
[2725] | 1003 | int cur = int_buf[i];
|
---|
| 1004 | if (cur == ' ' || cur == '<' || cur == '>' || cur == '|' || cur == '&') {
|
---|
| 1005 | remove_chunk(int_buf, 0, i + 1);
|
---|
[1765] | 1006 | break;
|
---|
| 1007 | }
|
---|
| 1008 | }
|
---|
[2725] | 1009 |
|
---|
| 1010 | /* Convert back to string of _chars_ */
|
---|
| 1011 | i = 0;
|
---|
| 1012 | while ((match_buf[i] = int_buf[i]) != '\0')
|
---|
[1765] | 1013 | i++;
|
---|
| 1014 |
|
---|
[2725] | 1015 | if (dbg_bmp) printf("final match_buf:'%s'\n", match_buf);
|
---|
[1765] | 1016 |
|
---|
| 1017 | return command_mode;
|
---|
| 1018 | }
|
---|
| 1019 |
|
---|
| 1020 | /*
|
---|
[2725] | 1021 | * Display by column (original idea from ls applet,
|
---|
| 1022 | * very optimized by me [Vladimir] :)
|
---|
[1765] | 1023 | */
|
---|
| 1024 | static void showfiles(void)
|
---|
| 1025 | {
|
---|
| 1026 | int ncols, row;
|
---|
| 1027 | int column_width = 0;
|
---|
| 1028 | int nfiles = num_matches;
|
---|
| 1029 | int nrows = nfiles;
|
---|
| 1030 | int l;
|
---|
| 1031 |
|
---|
[2725] | 1032 | /* find the longest file name - use that as the column width */
|
---|
[1765] | 1033 | for (row = 0; row < nrows; row++) {
|
---|
[2725] | 1034 | l = unicode_strwidth(matches[row]);
|
---|
[1765] | 1035 | if (column_width < l)
|
---|
| 1036 | column_width = l;
|
---|
| 1037 | }
|
---|
| 1038 | column_width += 2; /* min space for columns */
|
---|
| 1039 | ncols = cmdedit_termw / column_width;
|
---|
| 1040 |
|
---|
| 1041 | if (ncols > 1) {
|
---|
| 1042 | nrows /= ncols;
|
---|
| 1043 | if (nfiles % ncols)
|
---|
| 1044 | nrows++; /* round up fractionals */
|
---|
| 1045 | } else {
|
---|
| 1046 | ncols = 1;
|
---|
| 1047 | }
|
---|
| 1048 | for (row = 0; row < nrows; row++) {
|
---|
| 1049 | int n = row;
|
---|
| 1050 | int nc;
|
---|
| 1051 |
|
---|
| 1052 | for (nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++) {
|
---|
| 1053 | printf("%s%-*s", matches[n],
|
---|
[2725] | 1054 | (int)(column_width - unicode_strwidth(matches[n])), ""
|
---|
| 1055 | );
|
---|
[1765] | 1056 | }
|
---|
[2725] | 1057 | if (ENABLE_UNICODE_SUPPORT)
|
---|
| 1058 | puts(printable_string(NULL, matches[n]));
|
---|
| 1059 | else
|
---|
| 1060 | puts(matches[n]);
|
---|
[1765] | 1061 | }
|
---|
| 1062 | }
|
---|
| 1063 |
|
---|
[2725] | 1064 | static const char *is_special_char(char c)
|
---|
[1765] | 1065 | {
|
---|
[2725] | 1066 | return strchr(" `\"#$%^&*()=+{}[]:;'|\\<>", c);
|
---|
| 1067 | }
|
---|
| 1068 |
|
---|
| 1069 | static char *quote_special_chars(char *found)
|
---|
| 1070 | {
|
---|
[1765] | 1071 | int l = 0;
|
---|
[2725] | 1072 | char *s = xzalloc((strlen(found) + 1) * 2);
|
---|
[1765] | 1073 |
|
---|
| 1074 | while (*found) {
|
---|
[2725] | 1075 | if (is_special_char(*found))
|
---|
[1765] | 1076 | s[l++] = '\\';
|
---|
| 1077 | s[l++] = *found++;
|
---|
| 1078 | }
|
---|
[2725] | 1079 | /* s[l] = '\0'; - already is */
|
---|
[1765] | 1080 | return s;
|
---|
| 1081 | }
|
---|
| 1082 |
|
---|
| 1083 | /* Do TAB completion */
|
---|
[2725] | 1084 | static NOINLINE void input_tab(smallint *lastWasTab)
|
---|
[1765] | 1085 | {
|
---|
[2725] | 1086 | char *chosen_match;
|
---|
| 1087 | char *match_buf;
|
---|
| 1088 | size_t len_found;
|
---|
| 1089 | /* Length of string used for matching */
|
---|
| 1090 | unsigned match_pfx_len = match_pfx_len;
|
---|
| 1091 | int find_type;
|
---|
| 1092 | # if ENABLE_UNICODE_SUPPORT
|
---|
| 1093 | /* cursor pos in command converted to multibyte form */
|
---|
| 1094 | int cursor_mb;
|
---|
| 1095 | # endif
|
---|
[1765] | 1096 | if (!(state->flags & TAB_COMPLETION))
|
---|
| 1097 | return;
|
---|
| 1098 |
|
---|
[2725] | 1099 | if (*lastWasTab) {
|
---|
| 1100 | /* The last char was a TAB too.
|
---|
| 1101 | * Print a list of all the available choices.
|
---|
| 1102 | */
|
---|
| 1103 | if (num_matches > 0) {
|
---|
| 1104 | /* cursor will be changed by goto_new_line() */
|
---|
| 1105 | int sav_cursor = cursor;
|
---|
| 1106 | goto_new_line();
|
---|
| 1107 | showfiles();
|
---|
| 1108 | redraw(0, command_len - sav_cursor);
|
---|
| 1109 | }
|
---|
| 1110 | return;
|
---|
| 1111 | }
|
---|
[1765] | 1112 |
|
---|
[2725] | 1113 | *lastWasTab = 1;
|
---|
| 1114 | chosen_match = NULL;
|
---|
[1765] | 1115 |
|
---|
[2725] | 1116 | /* Make a local copy of the string up to the position of the cursor.
|
---|
| 1117 | * build_match_prefix will expand it into int16_t's, need to allocate
|
---|
| 1118 | * twice as much as the string_len+1.
|
---|
| 1119 | * (we then also (ab)use this extra space later - see (**))
|
---|
| 1120 | */
|
---|
| 1121 | match_buf = xmalloc(MAX_LINELEN * sizeof(int16_t));
|
---|
| 1122 | # if !ENABLE_UNICODE_SUPPORT
|
---|
| 1123 | save_string(match_buf, cursor + 1); /* +1 for NUL */
|
---|
| 1124 | # else
|
---|
| 1125 | {
|
---|
| 1126 | CHAR_T wc = command_ps[cursor];
|
---|
| 1127 | command_ps[cursor] = BB_NUL;
|
---|
| 1128 | save_string(match_buf, MAX_LINELEN);
|
---|
| 1129 | command_ps[cursor] = wc;
|
---|
| 1130 | cursor_mb = strlen(match_buf);
|
---|
| 1131 | }
|
---|
| 1132 | # endif
|
---|
| 1133 | find_type = build_match_prefix(match_buf);
|
---|
[1765] | 1134 |
|
---|
[2725] | 1135 | /* Free up any memory already allocated */
|
---|
| 1136 | free_tab_completion_data();
|
---|
[1765] | 1137 |
|
---|
[2725] | 1138 | # if ENABLE_FEATURE_USERNAME_COMPLETION
|
---|
| 1139 | /* If the word starts with ~ and there is no slash in the word,
|
---|
| 1140 | * then try completing this word as a username. */
|
---|
| 1141 | if (state->flags & USERNAME_COMPLETION)
|
---|
| 1142 | if (match_buf[0] == '~' && strchr(match_buf, '/') == NULL)
|
---|
| 1143 | match_pfx_len = complete_username(match_buf);
|
---|
| 1144 | # endif
|
---|
| 1145 | /* If complete_username() did not match,
|
---|
| 1146 | * try to match a command in $PATH, or a directory, or a file */
|
---|
| 1147 | if (!matches)
|
---|
| 1148 | match_pfx_len = complete_cmd_dir_file(match_buf, find_type);
|
---|
[1765] | 1149 |
|
---|
[2725] | 1150 | /* Account for backslashes which will be inserted
|
---|
| 1151 | * by quote_special_chars() later */
|
---|
| 1152 | {
|
---|
| 1153 | const char *e = match_buf + strlen(match_buf);
|
---|
| 1154 | const char *s = e - match_pfx_len;
|
---|
| 1155 | while (s < e)
|
---|
| 1156 | if (is_special_char(*s++))
|
---|
| 1157 | match_pfx_len++;
|
---|
| 1158 | }
|
---|
| 1159 |
|
---|
| 1160 | /* Remove duplicates */
|
---|
| 1161 | if (matches) {
|
---|
| 1162 | unsigned i, n = 0;
|
---|
| 1163 | qsort_string_vector(matches, num_matches);
|
---|
| 1164 | for (i = 0; i < num_matches - 1; ++i) {
|
---|
| 1165 | //if (matches[i] && matches[i+1]) { /* paranoia */
|
---|
| 1166 | if (strcmp(matches[i], matches[i+1]) == 0) {
|
---|
| 1167 | free(matches[i]);
|
---|
| 1168 | //matches[i] = NULL; /* paranoia */
|
---|
| 1169 | } else {
|
---|
| 1170 | matches[n++] = matches[i];
|
---|
[1765] | 1171 | }
|
---|
[2725] | 1172 | //}
|
---|
[1765] | 1173 | }
|
---|
[2725] | 1174 | matches[n++] = matches[i];
|
---|
| 1175 | num_matches = n;
|
---|
| 1176 | }
|
---|
[1765] | 1177 |
|
---|
[2725] | 1178 | /* Did we find exactly one match? */
|
---|
| 1179 | if (num_matches != 1) { /* no */
|
---|
| 1180 | char *cp;
|
---|
| 1181 | beep();
|
---|
| 1182 | if (!matches)
|
---|
| 1183 | goto ret; /* no matches at all */
|
---|
| 1184 | /* Find common prefix */
|
---|
| 1185 | chosen_match = xstrdup(matches[0]);
|
---|
| 1186 | for (cp = chosen_match; *cp; cp++) {
|
---|
| 1187 | unsigned n;
|
---|
| 1188 | for (n = 1; n < num_matches; n++) {
|
---|
| 1189 | if (matches[n][cp - chosen_match] != *cp) {
|
---|
| 1190 | goto stop;
|
---|
| 1191 | }
|
---|
[1765] | 1192 | }
|
---|
| 1193 | }
|
---|
[2725] | 1194 | stop:
|
---|
| 1195 | if (cp == chosen_match) { /* have unique prefix? */
|
---|
| 1196 | goto ret; /* no */
|
---|
[1765] | 1197 | }
|
---|
[2725] | 1198 | *cp = '\0';
|
---|
| 1199 | cp = quote_special_chars(chosen_match);
|
---|
| 1200 | free(chosen_match);
|
---|
| 1201 | chosen_match = cp;
|
---|
| 1202 | len_found = strlen(chosen_match);
|
---|
| 1203 | } else { /* exactly one match */
|
---|
| 1204 | /* Next <tab> is not a double-tab */
|
---|
| 1205 | *lastWasTab = 0;
|
---|
[1765] | 1206 |
|
---|
[2725] | 1207 | chosen_match = quote_special_chars(matches[0]);
|
---|
| 1208 | len_found = strlen(chosen_match);
|
---|
| 1209 | if (chosen_match[len_found-1] != '/') {
|
---|
| 1210 | chosen_match[len_found] = ' ';
|
---|
| 1211 | chosen_match[++len_found] = '\0';
|
---|
[1765] | 1212 | }
|
---|
| 1213 | }
|
---|
[2725] | 1214 |
|
---|
| 1215 | # if !ENABLE_UNICODE_SUPPORT
|
---|
| 1216 | /* Have space to place the match? */
|
---|
| 1217 | /* The result consists of three parts with these lengths: */
|
---|
| 1218 | /* cursor + (len_found - match_pfx_len) + (command_len - cursor) */
|
---|
| 1219 | /* it simplifies into: */
|
---|
| 1220 | if ((int)(len_found - match_pfx_len + command_len) < S.maxsize) {
|
---|
| 1221 | int pos;
|
---|
| 1222 | /* save tail */
|
---|
| 1223 | strcpy(match_buf, &command_ps[cursor]);
|
---|
| 1224 | /* add match and tail */
|
---|
| 1225 | sprintf(&command_ps[cursor], "%s%s", chosen_match + match_pfx_len, match_buf);
|
---|
| 1226 | command_len = strlen(command_ps);
|
---|
| 1227 | /* new pos */
|
---|
| 1228 | pos = cursor + len_found - match_pfx_len;
|
---|
| 1229 | /* write out the matched command */
|
---|
| 1230 | redraw(cmdedit_y, command_len - pos);
|
---|
| 1231 | }
|
---|
| 1232 | # else
|
---|
| 1233 | {
|
---|
| 1234 | /* Use 2nd half of match_buf as scratch space - see (**) */
|
---|
| 1235 | char *command = match_buf + MAX_LINELEN;
|
---|
| 1236 | int len = save_string(command, MAX_LINELEN);
|
---|
| 1237 | /* Have space to place the match? */
|
---|
| 1238 | /* cursor_mb + (len_found - match_pfx_len) + (len - cursor_mb) */
|
---|
| 1239 | if ((int)(len_found - match_pfx_len + len) < MAX_LINELEN) {
|
---|
| 1240 | int pos;
|
---|
| 1241 | /* save tail */
|
---|
| 1242 | strcpy(match_buf, &command[cursor_mb]);
|
---|
| 1243 | /* where do we want to have cursor after all? */
|
---|
| 1244 | strcpy(&command[cursor_mb], chosen_match + match_pfx_len);
|
---|
[3232] | 1245 | len = load_string(command);
|
---|
[2725] | 1246 | /* add match and tail */
|
---|
| 1247 | sprintf(&command[cursor_mb], "%s%s", chosen_match + match_pfx_len, match_buf);
|
---|
[3232] | 1248 | command_len = load_string(command);
|
---|
[2725] | 1249 | /* write out the matched command */
|
---|
| 1250 | /* paranoia: load_string can return 0 on conv error,
|
---|
| 1251 | * prevent passing pos = (0 - 12) to redraw */
|
---|
| 1252 | pos = command_len - len;
|
---|
| 1253 | redraw(cmdedit_y, pos >= 0 ? pos : 0);
|
---|
| 1254 | }
|
---|
| 1255 | }
|
---|
| 1256 | # endif
|
---|
| 1257 | ret:
|
---|
| 1258 | free(chosen_match);
|
---|
| 1259 | free(match_buf);
|
---|
[1765] | 1260 | }
|
---|
| 1261 |
|
---|
[2725] | 1262 | #endif /* FEATURE_TAB_COMPLETION */
|
---|
[1765] | 1263 |
|
---|
| 1264 |
|
---|
[2725] | 1265 | line_input_t* FAST_FUNC new_line_input_t(int flags)
|
---|
| 1266 | {
|
---|
| 1267 | line_input_t *n = xzalloc(sizeof(*n));
|
---|
| 1268 | n->flags = flags;
|
---|
[3621] | 1269 | #if MAX_HISTORY > 0
|
---|
[3232] | 1270 | n->max_history = MAX_HISTORY;
|
---|
[3621] | 1271 | #endif
|
---|
[2725] | 1272 | return n;
|
---|
| 1273 | }
|
---|
| 1274 |
|
---|
| 1275 |
|
---|
[1765] | 1276 | #if MAX_HISTORY > 0
|
---|
| 1277 |
|
---|
[3621] | 1278 | unsigned FAST_FUNC size_from_HISTFILESIZE(const char *hp)
|
---|
[3232] | 1279 | {
|
---|
| 1280 | int size = MAX_HISTORY;
|
---|
| 1281 | if (hp) {
|
---|
| 1282 | size = atoi(hp);
|
---|
| 1283 | if (size <= 0)
|
---|
| 1284 | return 1;
|
---|
| 1285 | if (size > MAX_HISTORY)
|
---|
| 1286 | return MAX_HISTORY;
|
---|
| 1287 | }
|
---|
| 1288 | return size;
|
---|
| 1289 | }
|
---|
| 1290 |
|
---|
[2725] | 1291 | static void save_command_ps_at_cur_history(void)
|
---|
| 1292 | {
|
---|
| 1293 | if (command_ps[0] != BB_NUL) {
|
---|
| 1294 | int cur = state->cur_history;
|
---|
| 1295 | free(state->history[cur]);
|
---|
| 1296 |
|
---|
| 1297 | # if ENABLE_UNICODE_SUPPORT
|
---|
| 1298 | {
|
---|
| 1299 | char tbuf[MAX_LINELEN];
|
---|
| 1300 | save_string(tbuf, sizeof(tbuf));
|
---|
| 1301 | state->history[cur] = xstrdup(tbuf);
|
---|
| 1302 | }
|
---|
| 1303 | # else
|
---|
| 1304 | state->history[cur] = xstrdup(command_ps);
|
---|
| 1305 | # endif
|
---|
| 1306 | }
|
---|
| 1307 | }
|
---|
| 1308 |
|
---|
[1765] | 1309 | /* state->flags is already checked to be nonzero */
|
---|
[2725] | 1310 | static int get_previous_history(void)
|
---|
[1765] | 1311 | {
|
---|
[2725] | 1312 | if ((state->flags & DO_HISTORY) && state->cur_history) {
|
---|
| 1313 | save_command_ps_at_cur_history();
|
---|
| 1314 | state->cur_history--;
|
---|
| 1315 | return 1;
|
---|
[1765] | 1316 | }
|
---|
[2725] | 1317 | beep();
|
---|
| 1318 | return 0;
|
---|
[1765] | 1319 | }
|
---|
| 1320 |
|
---|
| 1321 | static int get_next_history(void)
|
---|
| 1322 | {
|
---|
| 1323 | if (state->flags & DO_HISTORY) {
|
---|
[2725] | 1324 | if (state->cur_history < state->cnt_history) {
|
---|
| 1325 | save_command_ps_at_cur_history(); /* save the current history line */
|
---|
| 1326 | return ++state->cur_history;
|
---|
[1765] | 1327 | }
|
---|
| 1328 | }
|
---|
| 1329 | beep();
|
---|
| 1330 | return 0;
|
---|
| 1331 | }
|
---|
| 1332 |
|
---|
[3621] | 1333 | /* Lists command history. Used by shell 'history' builtins */
|
---|
| 1334 | void FAST_FUNC show_history(const line_input_t *st)
|
---|
| 1335 | {
|
---|
| 1336 | int i;
|
---|
| 1337 |
|
---|
| 1338 | if (!st)
|
---|
| 1339 | return;
|
---|
| 1340 | for (i = 0; i < st->cnt_history; i++)
|
---|
| 1341 | printf("%4d %s\n", i, st->history[i]);
|
---|
| 1342 | }
|
---|
| 1343 |
|
---|
[2725] | 1344 | # if ENABLE_FEATURE_EDITING_SAVEHISTORY
|
---|
| 1345 | /* We try to ensure that concurrent additions to the history
|
---|
| 1346 | * do not overwrite each other.
|
---|
| 1347 | * Otherwise shell users get unhappy.
|
---|
| 1348 | *
|
---|
| 1349 | * History file is trimmed lazily, when it grows several times longer
|
---|
| 1350 | * than configured MAX_HISTORY lines.
|
---|
| 1351 | */
|
---|
| 1352 |
|
---|
| 1353 | static void free_line_input_t(line_input_t *n)
|
---|
| 1354 | {
|
---|
| 1355 | int i = n->cnt_history;
|
---|
| 1356 | while (i > 0)
|
---|
| 1357 | free(n->history[--i]);
|
---|
| 1358 | free(n);
|
---|
| 1359 | }
|
---|
| 1360 |
|
---|
[1765] | 1361 | /* state->flags is already checked to be nonzero */
|
---|
[2725] | 1362 | static void load_history(line_input_t *st_parm)
|
---|
[1765] | 1363 | {
|
---|
[2725] | 1364 | char *temp_h[MAX_HISTORY];
|
---|
| 1365 | char *line;
|
---|
[1765] | 1366 | FILE *fp;
|
---|
[2725] | 1367 | unsigned idx, i, line_len;
|
---|
[1765] | 1368 |
|
---|
[2725] | 1369 | /* NB: do not trash old history if file can't be opened */
|
---|
[1765] | 1370 |
|
---|
[2725] | 1371 | fp = fopen_for_read(st_parm->hist_file);
|
---|
[1765] | 1372 | if (fp) {
|
---|
[2725] | 1373 | /* clean up old history */
|
---|
| 1374 | for (idx = st_parm->cnt_history; idx > 0;) {
|
---|
| 1375 | idx--;
|
---|
| 1376 | free(st_parm->history[idx]);
|
---|
| 1377 | st_parm->history[idx] = NULL;
|
---|
| 1378 | }
|
---|
[1765] | 1379 |
|
---|
[2725] | 1380 | /* fill temp_h[], retaining only last MAX_HISTORY lines */
|
---|
| 1381 | memset(temp_h, 0, sizeof(temp_h));
|
---|
[3232] | 1382 | idx = 0;
|
---|
| 1383 | st_parm->cnt_history_in_file = 0;
|
---|
[2725] | 1384 | while ((line = xmalloc_fgetline(fp)) != NULL) {
|
---|
| 1385 | if (line[0] == '\0') {
|
---|
| 1386 | free(line);
|
---|
[1765] | 1387 | continue;
|
---|
| 1388 | }
|
---|
[2725] | 1389 | free(temp_h[idx]);
|
---|
| 1390 | temp_h[idx] = line;
|
---|
| 1391 | st_parm->cnt_history_in_file++;
|
---|
| 1392 | idx++;
|
---|
[3232] | 1393 | if (idx == st_parm->max_history)
|
---|
[2725] | 1394 | idx = 0;
|
---|
[1765] | 1395 | }
|
---|
| 1396 | fclose(fp);
|
---|
[2725] | 1397 |
|
---|
| 1398 | /* find first non-NULL temp_h[], if any */
|
---|
| 1399 | if (st_parm->cnt_history_in_file) {
|
---|
| 1400 | while (temp_h[idx] == NULL) {
|
---|
| 1401 | idx++;
|
---|
[3232] | 1402 | if (idx == st_parm->max_history)
|
---|
[2725] | 1403 | idx = 0;
|
---|
| 1404 | }
|
---|
| 1405 | }
|
---|
| 1406 |
|
---|
| 1407 | /* copy temp_h[] to st_parm->history[] */
|
---|
[3232] | 1408 | for (i = 0; i < st_parm->max_history;) {
|
---|
[2725] | 1409 | line = temp_h[idx];
|
---|
| 1410 | if (!line)
|
---|
| 1411 | break;
|
---|
| 1412 | idx++;
|
---|
[3232] | 1413 | if (idx == st_parm->max_history)
|
---|
[2725] | 1414 | idx = 0;
|
---|
| 1415 | line_len = strlen(line);
|
---|
| 1416 | if (line_len >= MAX_LINELEN)
|
---|
| 1417 | line[MAX_LINELEN-1] = '\0';
|
---|
| 1418 | st_parm->history[i++] = line;
|
---|
| 1419 | }
|
---|
| 1420 | st_parm->cnt_history = i;
|
---|
[3232] | 1421 | if (ENABLE_FEATURE_EDITING_SAVE_ON_EXIT)
|
---|
| 1422 | st_parm->cnt_history_in_file = i;
|
---|
[1765] | 1423 | }
|
---|
| 1424 | }
|
---|
| 1425 |
|
---|
[3232] | 1426 | # if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
|
---|
| 1427 | void save_history(line_input_t *st)
|
---|
| 1428 | {
|
---|
| 1429 | FILE *fp;
|
---|
| 1430 |
|
---|
| 1431 | if (!st->hist_file)
|
---|
| 1432 | return;
|
---|
| 1433 | if (st->cnt_history <= st->cnt_history_in_file)
|
---|
| 1434 | return;
|
---|
| 1435 |
|
---|
| 1436 | fp = fopen(st->hist_file, "a");
|
---|
| 1437 | if (fp) {
|
---|
| 1438 | int i, fd;
|
---|
| 1439 | char *new_name;
|
---|
| 1440 | line_input_t *st_temp;
|
---|
| 1441 |
|
---|
| 1442 | for (i = st->cnt_history_in_file; i < st->cnt_history; i++)
|
---|
| 1443 | fprintf(fp, "%s\n", st->history[i]);
|
---|
| 1444 | fclose(fp);
|
---|
| 1445 |
|
---|
| 1446 | /* we may have concurrently written entries from others.
|
---|
| 1447 | * load them */
|
---|
| 1448 | st_temp = new_line_input_t(st->flags);
|
---|
| 1449 | st_temp->hist_file = st->hist_file;
|
---|
| 1450 | st_temp->max_history = st->max_history;
|
---|
| 1451 | load_history(st_temp);
|
---|
| 1452 |
|
---|
| 1453 | /* write out temp file and replace hist_file atomically */
|
---|
| 1454 | new_name = xasprintf("%s.%u.new", st->hist_file, (int) getpid());
|
---|
| 1455 | fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
|
---|
| 1456 | if (fd >= 0) {
|
---|
| 1457 | fp = xfdopen_for_write(fd);
|
---|
| 1458 | for (i = 0; i < st_temp->cnt_history; i++)
|
---|
| 1459 | fprintf(fp, "%s\n", st_temp->history[i]);
|
---|
| 1460 | fclose(fp);
|
---|
| 1461 | if (rename(new_name, st->hist_file) == 0)
|
---|
| 1462 | st->cnt_history_in_file = st_temp->cnt_history;
|
---|
| 1463 | }
|
---|
| 1464 | free(new_name);
|
---|
| 1465 | free_line_input_t(st_temp);
|
---|
| 1466 | }
|
---|
| 1467 | }
|
---|
| 1468 | # else
|
---|
[2725] | 1469 | static void save_history(char *str)
|
---|
[1765] | 1470 | {
|
---|
[2725] | 1471 | int fd;
|
---|
| 1472 | int len, len2;
|
---|
[1765] | 1473 |
|
---|
[3232] | 1474 | if (!state->hist_file)
|
---|
| 1475 | return;
|
---|
| 1476 |
|
---|
[2725] | 1477 | fd = open(state->hist_file, O_WRONLY | O_CREAT | O_APPEND, 0600);
|
---|
| 1478 | if (fd < 0)
|
---|
| 1479 | return;
|
---|
| 1480 | xlseek(fd, 0, SEEK_END); /* paranoia */
|
---|
| 1481 | len = strlen(str);
|
---|
| 1482 | str[len] = '\n'; /* we (try to) do atomic write */
|
---|
| 1483 | len2 = full_write(fd, str, len + 1);
|
---|
| 1484 | str[len] = '\0';
|
---|
| 1485 | close(fd);
|
---|
| 1486 | if (len2 != len + 1)
|
---|
| 1487 | return; /* "wtf?" */
|
---|
[1765] | 1488 |
|
---|
[2725] | 1489 | /* did we write so much that history file needs trimming? */
|
---|
| 1490 | state->cnt_history_in_file++;
|
---|
[3232] | 1491 | if (state->cnt_history_in_file > state->max_history * 4) {
|
---|
[2725] | 1492 | char *new_name;
|
---|
| 1493 | line_input_t *st_temp;
|
---|
| 1494 |
|
---|
| 1495 | /* we may have concurrently written entries from others.
|
---|
| 1496 | * load them */
|
---|
| 1497 | st_temp = new_line_input_t(state->flags);
|
---|
| 1498 | st_temp->hist_file = state->hist_file;
|
---|
[3232] | 1499 | st_temp->max_history = state->max_history;
|
---|
[2725] | 1500 | load_history(st_temp);
|
---|
| 1501 |
|
---|
| 1502 | /* write out temp file and replace hist_file atomically */
|
---|
| 1503 | new_name = xasprintf("%s.%u.new", state->hist_file, (int) getpid());
|
---|
[3232] | 1504 | fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
|
---|
[2725] | 1505 | if (fd >= 0) {
|
---|
| 1506 | FILE *fp;
|
---|
| 1507 | int i;
|
---|
| 1508 |
|
---|
| 1509 | fp = xfdopen_for_write(fd);
|
---|
| 1510 | for (i = 0; i < st_temp->cnt_history; i++)
|
---|
| 1511 | fprintf(fp, "%s\n", st_temp->history[i]);
|
---|
| 1512 | fclose(fp);
|
---|
| 1513 | if (rename(new_name, state->hist_file) == 0)
|
---|
| 1514 | state->cnt_history_in_file = st_temp->cnt_history;
|
---|
[1765] | 1515 | }
|
---|
[2725] | 1516 | free(new_name);
|
---|
| 1517 | free_line_input_t(st_temp);
|
---|
[1765] | 1518 | }
|
---|
| 1519 | }
|
---|
[3232] | 1520 | # endif
|
---|
[2725] | 1521 | # else
|
---|
| 1522 | # define load_history(a) ((void)0)
|
---|
| 1523 | # define save_history(a) ((void)0)
|
---|
| 1524 | # endif /* FEATURE_COMMAND_SAVEHISTORY */
|
---|
[1765] | 1525 |
|
---|
[2725] | 1526 | static void remember_in_history(char *str)
|
---|
[1765] | 1527 | {
|
---|
| 1528 | int i;
|
---|
| 1529 |
|
---|
| 1530 | if (!(state->flags & DO_HISTORY))
|
---|
| 1531 | return;
|
---|
[2725] | 1532 | if (str[0] == '\0')
|
---|
| 1533 | return;
|
---|
| 1534 | i = state->cnt_history;
|
---|
| 1535 | /* Don't save dupes */
|
---|
| 1536 | if (i && strcmp(state->history[i-1], str) == 0)
|
---|
| 1537 | return;
|
---|
[1765] | 1538 |
|
---|
[3232] | 1539 | free(state->history[state->max_history]); /* redundant, paranoia */
|
---|
| 1540 | state->history[state->max_history] = NULL; /* redundant, paranoia */
|
---|
[2725] | 1541 |
|
---|
| 1542 | /* If history[] is full, remove the oldest command */
|
---|
[3232] | 1543 | /* we need to keep history[state->max_history] empty, hence >=, not > */
|
---|
| 1544 | if (i >= state->max_history) {
|
---|
[1765] | 1545 | free(state->history[0]);
|
---|
[3232] | 1546 | for (i = 0; i < state->max_history-1; i++)
|
---|
[1765] | 1547 | state->history[i] = state->history[i+1];
|
---|
[3232] | 1548 | /* i == state->max_history-1 */
|
---|
| 1549 | # if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
|
---|
| 1550 | if (state->cnt_history_in_file)
|
---|
| 1551 | state->cnt_history_in_file--;
|
---|
| 1552 | # endif
|
---|
[1765] | 1553 | }
|
---|
[3232] | 1554 | /* i <= state->max_history-1 */
|
---|
[1765] | 1555 | state->history[i++] = xstrdup(str);
|
---|
[3232] | 1556 | /* i <= state->max_history */
|
---|
[1765] | 1557 | state->cur_history = i;
|
---|
| 1558 | state->cnt_history = i;
|
---|
[3232] | 1559 | # if ENABLE_FEATURE_EDITING_SAVEHISTORY && !ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
|
---|
| 1560 | save_history(str);
|
---|
[2725] | 1561 | # endif
|
---|
[1765] | 1562 | }
|
---|
| 1563 |
|
---|
| 1564 | #else /* MAX_HISTORY == 0 */
|
---|
[2725] | 1565 | # define remember_in_history(a) ((void)0)
|
---|
[1765] | 1566 | #endif /* MAX_HISTORY */
|
---|
| 1567 |
|
---|
| 1568 |
|
---|
[2725] | 1569 | #if ENABLE_FEATURE_EDITING_VI
|
---|
[1765] | 1570 | /*
|
---|
| 1571 | * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
|
---|
| 1572 | */
|
---|
| 1573 | static void
|
---|
[2725] | 1574 | vi_Word_motion(int eat)
|
---|
[1765] | 1575 | {
|
---|
[2725] | 1576 | CHAR_T *command = command_ps;
|
---|
| 1577 |
|
---|
| 1578 | while (cursor < command_len && !BB_isspace(command[cursor]))
|
---|
[1765] | 1579 | input_forward();
|
---|
[2725] | 1580 | if (eat) while (cursor < command_len && BB_isspace(command[cursor]))
|
---|
[1765] | 1581 | input_forward();
|
---|
| 1582 | }
|
---|
| 1583 |
|
---|
| 1584 | static void
|
---|
[2725] | 1585 | vi_word_motion(int eat)
|
---|
[1765] | 1586 | {
|
---|
[2725] | 1587 | CHAR_T *command = command_ps;
|
---|
| 1588 |
|
---|
| 1589 | if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
|
---|
[1765] | 1590 | while (cursor < command_len
|
---|
[2725] | 1591 | && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
|
---|
| 1592 | ) {
|
---|
[1765] | 1593 | input_forward();
|
---|
[2725] | 1594 | }
|
---|
| 1595 | } else if (BB_ispunct(command[cursor])) {
|
---|
| 1596 | while (cursor < command_len && BB_ispunct(command[cursor+1]))
|
---|
[1765] | 1597 | input_forward();
|
---|
| 1598 | }
|
---|
| 1599 |
|
---|
| 1600 | if (cursor < command_len)
|
---|
| 1601 | input_forward();
|
---|
| 1602 |
|
---|
[2725] | 1603 | if (eat) {
|
---|
| 1604 | while (cursor < command_len && BB_isspace(command[cursor]))
|
---|
[1765] | 1605 | input_forward();
|
---|
[2725] | 1606 | }
|
---|
[1765] | 1607 | }
|
---|
| 1608 |
|
---|
| 1609 | static void
|
---|
[2725] | 1610 | vi_End_motion(void)
|
---|
[1765] | 1611 | {
|
---|
[2725] | 1612 | CHAR_T *command = command_ps;
|
---|
| 1613 |
|
---|
[1765] | 1614 | input_forward();
|
---|
[2725] | 1615 | while (cursor < command_len && BB_isspace(command[cursor]))
|
---|
[1765] | 1616 | input_forward();
|
---|
[2725] | 1617 | while (cursor < command_len-1 && !BB_isspace(command[cursor+1]))
|
---|
[1765] | 1618 | input_forward();
|
---|
| 1619 | }
|
---|
| 1620 |
|
---|
| 1621 | static void
|
---|
[2725] | 1622 | vi_end_motion(void)
|
---|
[1765] | 1623 | {
|
---|
[2725] | 1624 | CHAR_T *command = command_ps;
|
---|
| 1625 |
|
---|
[1765] | 1626 | if (cursor >= command_len-1)
|
---|
| 1627 | return;
|
---|
| 1628 | input_forward();
|
---|
[2725] | 1629 | while (cursor < command_len-1 && BB_isspace(command[cursor]))
|
---|
[1765] | 1630 | input_forward();
|
---|
| 1631 | if (cursor >= command_len-1)
|
---|
| 1632 | return;
|
---|
[2725] | 1633 | if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
|
---|
[1765] | 1634 | while (cursor < command_len-1
|
---|
[2725] | 1635 | && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
|
---|
[1765] | 1636 | ) {
|
---|
| 1637 | input_forward();
|
---|
| 1638 | }
|
---|
[2725] | 1639 | } else if (BB_ispunct(command[cursor])) {
|
---|
| 1640 | while (cursor < command_len-1 && BB_ispunct(command[cursor+1]))
|
---|
[1765] | 1641 | input_forward();
|
---|
| 1642 | }
|
---|
| 1643 | }
|
---|
| 1644 |
|
---|
| 1645 | static void
|
---|
[2725] | 1646 | vi_Back_motion(void)
|
---|
[1765] | 1647 | {
|
---|
[2725] | 1648 | CHAR_T *command = command_ps;
|
---|
| 1649 |
|
---|
| 1650 | while (cursor > 0 && BB_isspace(command[cursor-1]))
|
---|
[1765] | 1651 | input_backward(1);
|
---|
[2725] | 1652 | while (cursor > 0 && !BB_isspace(command[cursor-1]))
|
---|
[1765] | 1653 | input_backward(1);
|
---|
| 1654 | }
|
---|
| 1655 |
|
---|
| 1656 | static void
|
---|
[2725] | 1657 | vi_back_motion(void)
|
---|
[1765] | 1658 | {
|
---|
[2725] | 1659 | CHAR_T *command = command_ps;
|
---|
| 1660 |
|
---|
[1765] | 1661 | if (cursor <= 0)
|
---|
| 1662 | return;
|
---|
| 1663 | input_backward(1);
|
---|
[2725] | 1664 | while (cursor > 0 && BB_isspace(command[cursor]))
|
---|
[1765] | 1665 | input_backward(1);
|
---|
| 1666 | if (cursor <= 0)
|
---|
| 1667 | return;
|
---|
[2725] | 1668 | if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
|
---|
[1765] | 1669 | while (cursor > 0
|
---|
[2725] | 1670 | && (BB_isalnum(command[cursor-1]) || command[cursor-1] == '_')
|
---|
[1765] | 1671 | ) {
|
---|
| 1672 | input_backward(1);
|
---|
| 1673 | }
|
---|
[2725] | 1674 | } else if (BB_ispunct(command[cursor])) {
|
---|
| 1675 | while (cursor > 0 && BB_ispunct(command[cursor-1]))
|
---|
[1765] | 1676 | input_backward(1);
|
---|
| 1677 | }
|
---|
| 1678 | }
|
---|
| 1679 | #endif
|
---|
| 1680 |
|
---|
[2725] | 1681 | /* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
|
---|
| 1682 | static void ctrl_left(void)
|
---|
| 1683 | {
|
---|
| 1684 | CHAR_T *command = command_ps;
|
---|
[1765] | 1685 |
|
---|
[2725] | 1686 | while (1) {
|
---|
| 1687 | CHAR_T c;
|
---|
| 1688 |
|
---|
| 1689 | input_backward(1);
|
---|
| 1690 | if (cursor == 0)
|
---|
| 1691 | break;
|
---|
| 1692 | c = command[cursor];
|
---|
| 1693 | if (c != ' ' && !BB_ispunct(c)) {
|
---|
| 1694 | /* we reached a "word" delimited by spaces/punct.
|
---|
| 1695 | * go to its beginning */
|
---|
| 1696 | while (1) {
|
---|
| 1697 | c = command[cursor - 1];
|
---|
| 1698 | if (c == ' ' || BB_ispunct(c))
|
---|
| 1699 | break;
|
---|
| 1700 | input_backward(1);
|
---|
| 1701 | if (cursor == 0)
|
---|
| 1702 | break;
|
---|
| 1703 | }
|
---|
| 1704 | break;
|
---|
| 1705 | }
|
---|
| 1706 | }
|
---|
| 1707 | }
|
---|
| 1708 | static void ctrl_right(void)
|
---|
| 1709 | {
|
---|
| 1710 | CHAR_T *command = command_ps;
|
---|
| 1711 |
|
---|
| 1712 | while (1) {
|
---|
| 1713 | CHAR_T c;
|
---|
| 1714 |
|
---|
| 1715 | c = command[cursor];
|
---|
| 1716 | if (c == BB_NUL)
|
---|
| 1717 | break;
|
---|
| 1718 | if (c != ' ' && !BB_ispunct(c)) {
|
---|
| 1719 | /* we reached a "word" delimited by spaces/punct.
|
---|
| 1720 | * go to its end + 1 */
|
---|
| 1721 | while (1) {
|
---|
| 1722 | input_forward();
|
---|
| 1723 | c = command[cursor];
|
---|
| 1724 | if (c == BB_NUL || c == ' ' || BB_ispunct(c))
|
---|
| 1725 | break;
|
---|
| 1726 | }
|
---|
| 1727 | break;
|
---|
| 1728 | }
|
---|
| 1729 | input_forward();
|
---|
| 1730 | }
|
---|
| 1731 | }
|
---|
| 1732 |
|
---|
| 1733 |
|
---|
[1765] | 1734 | /*
|
---|
| 1735 | * read_line_input and its helpers
|
---|
| 1736 | */
|
---|
| 1737 |
|
---|
[2725] | 1738 | #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
|
---|
| 1739 | static void ask_terminal(void)
|
---|
| 1740 | {
|
---|
| 1741 | /* Ask terminal where is the cursor now.
|
---|
| 1742 | * lineedit_read_key handles response and corrects
|
---|
| 1743 | * our idea of current cursor position.
|
---|
| 1744 | * Testcase: run "echo -n long_line_long_line_long_line",
|
---|
| 1745 | * then type in a long, wrapping command and try to
|
---|
| 1746 | * delete it using backspace key.
|
---|
| 1747 | * Note: we print it _after_ prompt, because
|
---|
| 1748 | * prompt may contain CR. Example: PS1='\[\r\n\]\w '
|
---|
| 1749 | */
|
---|
| 1750 | /* Problem: if there is buffered input on stdin,
|
---|
| 1751 | * the response will be delivered later,
|
---|
| 1752 | * possibly to an unsuspecting application.
|
---|
| 1753 | * Testcase: "sleep 1; busybox ash" + press and hold [Enter].
|
---|
| 1754 | * Result:
|
---|
| 1755 | * ~/srcdevel/bbox/fix/busybox.t4 #
|
---|
| 1756 | * ~/srcdevel/bbox/fix/busybox.t4 #
|
---|
| 1757 | * ^[[59;34~/srcdevel/bbox/fix/busybox.t4 # <-- garbage
|
---|
| 1758 | * ~/srcdevel/bbox/fix/busybox.t4 #
|
---|
| 1759 | *
|
---|
| 1760 | * Checking for input with poll only makes the race narrower,
|
---|
| 1761 | * I still can trigger it. Strace:
|
---|
| 1762 | *
|
---|
| 1763 | * write(1, "~/srcdevel/bbox/fix/busybox.t4 # ", 33) = 33
|
---|
| 1764 | * poll([{fd=0, events=POLLIN}], 1, 0) = 0 (Timeout) <-- no input exists
|
---|
| 1765 | * write(1, "\33[6n", 4) = 4 <-- send the ESC sequence, quick!
|
---|
[3232] | 1766 | * poll([{fd=0, events=POLLIN}], 1, -1) = 1 ([{fd=0, revents=POLLIN}])
|
---|
[2725] | 1767 | * read(0, "\n", 1) = 1 <-- oh crap, user's input got in first
|
---|
| 1768 | */
|
---|
| 1769 | struct pollfd pfd;
|
---|
| 1770 |
|
---|
| 1771 | pfd.fd = STDIN_FILENO;
|
---|
| 1772 | pfd.events = POLLIN;
|
---|
| 1773 | if (safe_poll(&pfd, 1, 0) == 0) {
|
---|
| 1774 | S.sent_ESC_br6n = 1;
|
---|
| 1775 | fputs(ESC"[6n", stdout);
|
---|
| 1776 | fflush_all(); /* make terminal see it ASAP! */
|
---|
| 1777 | }
|
---|
| 1778 | }
|
---|
| 1779 | #else
|
---|
| 1780 | #define ask_terminal() ((void)0)
|
---|
| 1781 | #endif
|
---|
| 1782 |
|
---|
[3621] | 1783 | /* Called just once at read_line_input() init time */
|
---|
[1765] | 1784 | #if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
---|
[2725] | 1785 | static void parse_and_put_prompt(const char *prmt_ptr)
|
---|
[1765] | 1786 | {
|
---|
[3621] | 1787 | const char *p;
|
---|
[1765] | 1788 | cmdedit_prompt = prmt_ptr;
|
---|
[3621] | 1789 | p = strrchr(prmt_ptr, '\n');
|
---|
| 1790 | cmdedit_prmt_len = unicode_strwidth(p ? p+1 : prmt_ptr);
|
---|
[1765] | 1791 | put_prompt();
|
---|
| 1792 | }
|
---|
| 1793 | #else
|
---|
[2725] | 1794 | static void parse_and_put_prompt(const char *prmt_ptr)
|
---|
[1765] | 1795 | {
|
---|
[3621] | 1796 | int prmt_size = 0;
|
---|
| 1797 | char *prmt_mem_ptr = xzalloc(1);
|
---|
| 1798 | # if ENABLE_USERNAME_OR_HOMEDIR
|
---|
| 1799 | char *cwd_buf = NULL;
|
---|
| 1800 | # endif
|
---|
[1765] | 1801 | char flg_not_length = '[';
|
---|
[2725] | 1802 | char cbuf[2];
|
---|
[1765] | 1803 |
|
---|
[3621] | 1804 | /*cmdedit_prmt_len = 0; - already is */
|
---|
[1765] | 1805 |
|
---|
[2725] | 1806 | cbuf[1] = '\0'; /* never changes */
|
---|
| 1807 |
|
---|
[1765] | 1808 | while (*prmt_ptr) {
|
---|
[3621] | 1809 | char timebuf[sizeof("HH:MM:SS")];
|
---|
[2725] | 1810 | char *free_me = NULL;
|
---|
[3621] | 1811 | char *pbuf;
|
---|
| 1812 | char c;
|
---|
[2725] | 1813 |
|
---|
| 1814 | pbuf = cbuf;
|
---|
[1765] | 1815 | c = *prmt_ptr++;
|
---|
| 1816 | if (c == '\\') {
|
---|
[3621] | 1817 | const char *cp;
|
---|
[1765] | 1818 | int l;
|
---|
[3621] | 1819 | /*
|
---|
| 1820 | * Supported via bb_process_escape_sequence:
|
---|
| 1821 | * \a ASCII bell character (07)
|
---|
| 1822 | * \e ASCII escape character (033)
|
---|
| 1823 | * \n newline
|
---|
| 1824 | * \r carriage return
|
---|
| 1825 | * \\ backslash
|
---|
| 1826 | * \nnn char with octal code nnn
|
---|
| 1827 | * Supported:
|
---|
| 1828 | * \$ if the effective UID is 0, a #, otherwise a $
|
---|
| 1829 | * \w current working directory, with $HOME abbreviated with a tilde
|
---|
| 1830 | * Note: we do not support $PROMPT_DIRTRIM=n feature
|
---|
| 1831 | * \W basename of the current working directory, with $HOME abbreviated with a tilde
|
---|
| 1832 | * \h hostname up to the first '.'
|
---|
| 1833 | * \H hostname
|
---|
| 1834 | * \u username
|
---|
| 1835 | * \[ begin a sequence of non-printing characters
|
---|
| 1836 | * \] end a sequence of non-printing characters
|
---|
| 1837 | * \T current time in 12-hour HH:MM:SS format
|
---|
| 1838 | * \@ current time in 12-hour am/pm format
|
---|
| 1839 | * \A current time in 24-hour HH:MM format
|
---|
| 1840 | * \t current time in 24-hour HH:MM:SS format
|
---|
| 1841 | * (all of the above work as \A)
|
---|
| 1842 | * Not supported:
|
---|
| 1843 | * \! history number of this command
|
---|
| 1844 | * \# command number of this command
|
---|
| 1845 | * \j number of jobs currently managed by the shell
|
---|
| 1846 | * \l basename of the shell's terminal device name
|
---|
| 1847 | * \s name of the shell, the basename of $0 (the portion following the final slash)
|
---|
| 1848 | * \V release of bash, version + patch level (e.g., 2.00.0)
|
---|
| 1849 | * \d date in "Weekday Month Date" format (e.g., "Tue May 26")
|
---|
| 1850 | * \D{format}
|
---|
| 1851 | * format is passed to strftime(3).
|
---|
| 1852 | * An empty format results in a locale-specific time representation.
|
---|
| 1853 | * The braces are required.
|
---|
| 1854 | * Mishandled by bb_process_escape_sequence:
|
---|
| 1855 | * \v version of bash (e.g., 2.00)
|
---|
| 1856 | */
|
---|
| 1857 | cp = prmt_ptr;
|
---|
| 1858 | c = *cp;
|
---|
| 1859 | if (c != 't') /* don't treat \t as tab */
|
---|
| 1860 | c = bb_process_escape_sequence(&prmt_ptr);
|
---|
[1765] | 1861 | if (prmt_ptr == cp) {
|
---|
[2725] | 1862 | if (*cp == '\0')
|
---|
[1765] | 1863 | break;
|
---|
| 1864 | c = *prmt_ptr++;
|
---|
[2725] | 1865 |
|
---|
[1765] | 1866 | switch (c) {
|
---|
[2725] | 1867 | # if ENABLE_USERNAME_OR_HOMEDIR
|
---|
[1765] | 1868 | case 'u':
|
---|
| 1869 | pbuf = user_buf ? user_buf : (char*)"";
|
---|
| 1870 | break;
|
---|
[2725] | 1871 | # endif
|
---|
[3621] | 1872 | case 'H':
|
---|
[1765] | 1873 | case 'h':
|
---|
[2725] | 1874 | pbuf = free_me = safe_gethostname();
|
---|
[3621] | 1875 | if (c == 'h')
|
---|
| 1876 | strchrnul(pbuf, '.')[0] = '\0';
|
---|
[1765] | 1877 | break;
|
---|
| 1878 | case '$':
|
---|
| 1879 | c = (geteuid() == 0 ? '#' : '$');
|
---|
| 1880 | break;
|
---|
[3621] | 1881 | case 'T': /* 12-hour HH:MM:SS format */
|
---|
| 1882 | case '@': /* 12-hour am/pm format */
|
---|
| 1883 | case 'A': /* 24-hour HH:MM format */
|
---|
| 1884 | case 't': /* 24-hour HH:MM:SS format */
|
---|
| 1885 | /* We show all of them as 24-hour HH:MM */
|
---|
| 1886 | strftime_HHMMSS(timebuf, sizeof(timebuf), NULL)[-3] = '\0';
|
---|
| 1887 | pbuf = timebuf;
|
---|
| 1888 | break;
|
---|
[2725] | 1889 | # if ENABLE_USERNAME_OR_HOMEDIR
|
---|
[3621] | 1890 | case 'w': /* current dir */
|
---|
| 1891 | case 'W': /* basename of cur dir */
|
---|
| 1892 | if (!cwd_buf) {
|
---|
| 1893 | cwd_buf = xrealloc_getcwd_or_warn(NULL);
|
---|
| 1894 | if (!cwd_buf)
|
---|
| 1895 | cwd_buf = (char *)bb_msg_unknown;
|
---|
| 1896 | else if (home_pwd_buf[0]) {
|
---|
| 1897 | char *after_home_user;
|
---|
| 1898 |
|
---|
| 1899 | /* /home/user[/something] -> ~[/something] */
|
---|
| 1900 | after_home_user = is_prefixed_with(cwd_buf, home_pwd_buf);
|
---|
| 1901 | if (after_home_user
|
---|
| 1902 | && (*after_home_user == '/' || *after_home_user == '\0')
|
---|
| 1903 | ) {
|
---|
| 1904 | cwd_buf[0] = '~';
|
---|
| 1905 | overlapping_strcpy(cwd_buf + 1, after_home_user);
|
---|
| 1906 | }
|
---|
| 1907 | }
|
---|
[1765] | 1908 | }
|
---|
[2725] | 1909 | pbuf = cwd_buf;
|
---|
[3621] | 1910 | if (c == 'w')
|
---|
| 1911 | break;
|
---|
[1765] | 1912 | cp = strrchr(pbuf, '/');
|
---|
[3621] | 1913 | if (cp)
|
---|
| 1914 | pbuf = (char*)cp + 1;
|
---|
[1765] | 1915 | break;
|
---|
[3621] | 1916 | # endif
|
---|
| 1917 | // bb_process_escape_sequence does this now:
|
---|
| 1918 | // case 'e': case 'E': /* \e \E = \033 */
|
---|
| 1919 | // c = '\033';
|
---|
| 1920 | // break;
|
---|
[2725] | 1921 | case 'x': case 'X': {
|
---|
| 1922 | char buf2[4];
|
---|
[1765] | 1923 | for (l = 0; l < 3;) {
|
---|
[2725] | 1924 | unsigned h;
|
---|
[1765] | 1925 | buf2[l++] = *prmt_ptr;
|
---|
[2725] | 1926 | buf2[l] = '\0';
|
---|
| 1927 | h = strtoul(buf2, &pbuf, 16);
|
---|
[1765] | 1928 | if (h > UCHAR_MAX || (pbuf - buf2) < l) {
|
---|
[2725] | 1929 | buf2[--l] = '\0';
|
---|
[1765] | 1930 | break;
|
---|
| 1931 | }
|
---|
| 1932 | prmt_ptr++;
|
---|
| 1933 | }
|
---|
[2725] | 1934 | c = (char)strtoul(buf2, NULL, 16);
|
---|
[1765] | 1935 | if (c == 0)
|
---|
| 1936 | c = '?';
|
---|
[2725] | 1937 | pbuf = cbuf;
|
---|
[1765] | 1938 | break;
|
---|
[2725] | 1939 | }
|
---|
[1765] | 1940 | case '[': case ']':
|
---|
| 1941 | if (c == flg_not_length) {
|
---|
[3621] | 1942 | /* Toggle '['/']' hex 5b/5d */
|
---|
| 1943 | flg_not_length ^= 6;
|
---|
[1765] | 1944 | continue;
|
---|
| 1945 | }
|
---|
| 1946 | break;
|
---|
[2725] | 1947 | } /* switch */
|
---|
| 1948 | } /* if */
|
---|
| 1949 | } /* if */
|
---|
| 1950 | cbuf[0] = c;
|
---|
[3621] | 1951 | {
|
---|
| 1952 | int n = strlen(pbuf);
|
---|
| 1953 | prmt_size += n;
|
---|
| 1954 | if (c == '\n')
|
---|
| 1955 | cmdedit_prmt_len = 0;
|
---|
| 1956 | else if (flg_not_length != ']') {
|
---|
| 1957 | #if 0 /*ENABLE_UNICODE_SUPPORT*/
|
---|
| 1958 | /* Won't work, pbuf is one BYTE string here instead of an one Unicode char string. */
|
---|
| 1959 | /* FIXME */
|
---|
| 1960 | cmdedit_prmt_len += unicode_strwidth(pbuf);
|
---|
| 1961 | #else
|
---|
| 1962 | cmdedit_prmt_len += n;
|
---|
| 1963 | #endif
|
---|
| 1964 | }
|
---|
| 1965 | }
|
---|
| 1966 | prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_size+1), pbuf);
|
---|
[2725] | 1967 | free(free_me);
|
---|
| 1968 | } /* while */
|
---|
| 1969 |
|
---|
[3621] | 1970 | # if ENABLE_USERNAME_OR_HOMEDIR
|
---|
[2725] | 1971 | if (cwd_buf != (char *)bb_msg_unknown)
|
---|
| 1972 | free(cwd_buf);
|
---|
[3621] | 1973 | # endif
|
---|
[1765] | 1974 | cmdedit_prompt = prmt_mem_ptr;
|
---|
| 1975 | put_prompt();
|
---|
| 1976 | }
|
---|
| 1977 | #endif
|
---|
| 1978 |
|
---|
| 1979 | static void cmdedit_setwidth(unsigned w, int redraw_flg)
|
---|
| 1980 | {
|
---|
| 1981 | cmdedit_termw = w;
|
---|
| 1982 | if (redraw_flg) {
|
---|
| 1983 | /* new y for current cursor */
|
---|
| 1984 | int new_y = (cursor + cmdedit_prmt_len) / w;
|
---|
| 1985 | /* redraw */
|
---|
| 1986 | redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
|
---|
[2725] | 1987 | fflush_all();
|
---|
[1765] | 1988 | }
|
---|
| 1989 | }
|
---|
| 1990 |
|
---|
| 1991 | static void win_changed(int nsig)
|
---|
| 1992 | {
|
---|
[2725] | 1993 | int sv_errno = errno;
|
---|
| 1994 | unsigned width;
|
---|
[3232] | 1995 |
|
---|
[1765] | 1996 | get_terminal_width_height(0, &width, NULL);
|
---|
[3232] | 1997 | //FIXME: cmdedit_setwidth() -> redraw() -> printf() -> KABOOM! (we are in signal handler!)
|
---|
| 1998 | cmdedit_setwidth(width, /*redraw_flg:*/ nsig);
|
---|
| 1999 |
|
---|
[2725] | 2000 | errno = sv_errno;
|
---|
[1765] | 2001 | }
|
---|
| 2002 |
|
---|
[3232] | 2003 | static int lineedit_read_key(char *read_key_buffer, int timeout)
|
---|
[2725] | 2004 | {
|
---|
| 2005 | int64_t ic;
|
---|
| 2006 | #if ENABLE_UNICODE_SUPPORT
|
---|
| 2007 | char unicode_buf[MB_CUR_MAX + 1];
|
---|
| 2008 | int unicode_idx = 0;
|
---|
| 2009 | #endif
|
---|
[1765] | 2010 |
|
---|
[2725] | 2011 | while (1) {
|
---|
| 2012 | /* Wait for input. TIMEOUT = -1 makes read_key wait even
|
---|
| 2013 | * on nonblocking stdin, TIMEOUT = 50 makes sure we won't
|
---|
| 2014 | * insist on full MB_CUR_MAX buffer to declare input like
|
---|
| 2015 | * "\xff\n",pause,"ls\n" invalid and thus won't lose "ls".
|
---|
| 2016 | *
|
---|
| 2017 | * Note: read_key sets errno to 0 on success.
|
---|
| 2018 | */
|
---|
| 2019 | ic = read_key(STDIN_FILENO, read_key_buffer, timeout);
|
---|
| 2020 | if (errno) {
|
---|
| 2021 | #if ENABLE_UNICODE_SUPPORT
|
---|
| 2022 | if (errno == EAGAIN && unicode_idx != 0)
|
---|
| 2023 | goto pushback;
|
---|
| 2024 | #endif
|
---|
| 2025 | break;
|
---|
| 2026 | }
|
---|
[1765] | 2027 |
|
---|
[2725] | 2028 | #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
|
---|
| 2029 | if ((int32_t)ic == KEYCODE_CURSOR_POS
|
---|
| 2030 | && S.sent_ESC_br6n
|
---|
| 2031 | ) {
|
---|
| 2032 | S.sent_ESC_br6n = 0;
|
---|
| 2033 | if (cursor == 0) { /* otherwise it may be bogus */
|
---|
| 2034 | int col = ((ic >> 32) & 0x7fff) - 1;
|
---|
[3621] | 2035 | /*
|
---|
| 2036 | * Is col > cmdedit_prmt_len?
|
---|
| 2037 | * If yes (terminal says cursor is farther to the right
|
---|
| 2038 | * of where we think it should be),
|
---|
| 2039 | * the prompt wasn't printed starting at col 1,
|
---|
| 2040 | * there was additional text before it.
|
---|
| 2041 | */
|
---|
| 2042 | if ((int)(col - cmdedit_prmt_len) > 0) {
|
---|
| 2043 | /* Fix our understanding of current x position */
|
---|
[2725] | 2044 | cmdedit_x += (col - cmdedit_prmt_len);
|
---|
| 2045 | while (cmdedit_x >= cmdedit_termw) {
|
---|
| 2046 | cmdedit_x -= cmdedit_termw;
|
---|
| 2047 | cmdedit_y++;
|
---|
| 2048 | }
|
---|
| 2049 | }
|
---|
| 2050 | }
|
---|
| 2051 | continue;
|
---|
| 2052 | }
|
---|
| 2053 | #endif
|
---|
| 2054 |
|
---|
| 2055 | #if ENABLE_UNICODE_SUPPORT
|
---|
| 2056 | if (unicode_status == UNICODE_ON) {
|
---|
| 2057 | wchar_t wc;
|
---|
| 2058 |
|
---|
| 2059 | if ((int32_t)ic < 0) /* KEYCODE_xxx */
|
---|
| 2060 | break;
|
---|
| 2061 | // TODO: imagine sequence like: 0xff,<left-arrow>: we are currently losing 0xff...
|
---|
| 2062 |
|
---|
| 2063 | unicode_buf[unicode_idx++] = ic;
|
---|
| 2064 | unicode_buf[unicode_idx] = '\0';
|
---|
| 2065 | if (mbstowcs(&wc, unicode_buf, 1) != 1) {
|
---|
| 2066 | /* Not (yet?) a valid unicode char */
|
---|
| 2067 | if (unicode_idx < MB_CUR_MAX) {
|
---|
| 2068 | timeout = 50;
|
---|
| 2069 | continue;
|
---|
| 2070 | }
|
---|
| 2071 | pushback:
|
---|
| 2072 | /* Invalid sequence. Save all "bad bytes" except first */
|
---|
| 2073 | read_key_ungets(read_key_buffer, unicode_buf + 1, unicode_idx - 1);
|
---|
| 2074 | # if !ENABLE_UNICODE_PRESERVE_BROKEN
|
---|
| 2075 | ic = CONFIG_SUBST_WCHAR;
|
---|
| 2076 | # else
|
---|
| 2077 | ic = unicode_mark_raw_byte(unicode_buf[0]);
|
---|
| 2078 | # endif
|
---|
| 2079 | } else {
|
---|
| 2080 | /* Valid unicode char, return its code */
|
---|
| 2081 | ic = wc;
|
---|
| 2082 | }
|
---|
| 2083 | }
|
---|
| 2084 | #endif
|
---|
| 2085 | break;
|
---|
| 2086 | }
|
---|
| 2087 |
|
---|
| 2088 | return ic;
|
---|
| 2089 | }
|
---|
| 2090 |
|
---|
| 2091 | #if ENABLE_UNICODE_BIDI_SUPPORT
|
---|
| 2092 | static int isrtl_str(void)
|
---|
| 2093 | {
|
---|
| 2094 | int idx = cursor;
|
---|
| 2095 |
|
---|
| 2096 | while (idx < command_len && unicode_bidi_is_neutral_wchar(command_ps[idx]))
|
---|
| 2097 | idx++;
|
---|
| 2098 | return unicode_bidi_isrtl(command_ps[idx]);
|
---|
| 2099 | }
|
---|
| 2100 | #else
|
---|
| 2101 | # define isrtl_str() 0
|
---|
| 2102 | #endif
|
---|
| 2103 |
|
---|
[1765] | 2104 | /* leave out the "vi-mode"-only case labels if vi editing isn't
|
---|
| 2105 | * configured. */
|
---|
[2725] | 2106 | #define vi_case(caselabel) IF_FEATURE_EDITING_VI(case caselabel)
|
---|
[1765] | 2107 |
|
---|
| 2108 | /* convert uppercase ascii to equivalent control char, for readability */
|
---|
| 2109 | #undef CTRL
|
---|
| 2110 | #define CTRL(a) ((a) & ~0x40)
|
---|
| 2111 |
|
---|
[3232] | 2112 | enum {
|
---|
| 2113 | VI_CMDMODE_BIT = 0x40000000,
|
---|
| 2114 | /* 0x80000000 bit flags KEYCODE_xxx */
|
---|
| 2115 | };
|
---|
| 2116 |
|
---|
| 2117 | #if ENABLE_FEATURE_REVERSE_SEARCH
|
---|
| 2118 | /* Mimic readline Ctrl-R reverse history search.
|
---|
| 2119 | * When invoked, it shows the following prompt:
|
---|
| 2120 | * (reverse-i-search)'': user_input [cursor pos unchanged by Ctrl-R]
|
---|
| 2121 | * and typing results in search being performed:
|
---|
| 2122 | * (reverse-i-search)'tmp': cd /tmp [cursor under t in /tmp]
|
---|
| 2123 | * Search is performed by looking at progressively older lines in history.
|
---|
| 2124 | * Ctrl-R again searches for the next match in history.
|
---|
| 2125 | * Backspace deletes last matched char.
|
---|
| 2126 | * Control keys exit search and return to normal editing (at current history line).
|
---|
| 2127 | */
|
---|
| 2128 | static int32_t reverse_i_search(void)
|
---|
| 2129 | {
|
---|
| 2130 | char match_buf[128]; /* for user input */
|
---|
| 2131 | char read_key_buffer[KEYCODE_BUFFER_SIZE];
|
---|
| 2132 | const char *matched_history_line;
|
---|
| 2133 | const char *saved_prompt;
|
---|
[3621] | 2134 | unsigned saved_prmt_len;
|
---|
[3232] | 2135 | int32_t ic;
|
---|
| 2136 |
|
---|
| 2137 | matched_history_line = NULL;
|
---|
| 2138 | read_key_buffer[0] = 0;
|
---|
| 2139 | match_buf[0] = '\0';
|
---|
| 2140 |
|
---|
| 2141 | /* Save and replace the prompt */
|
---|
| 2142 | saved_prompt = cmdedit_prompt;
|
---|
[3621] | 2143 | saved_prmt_len = cmdedit_prmt_len;
|
---|
[3232] | 2144 | goto set_prompt;
|
---|
| 2145 |
|
---|
| 2146 | while (1) {
|
---|
| 2147 | int h;
|
---|
| 2148 | unsigned match_buf_len = strlen(match_buf);
|
---|
| 2149 |
|
---|
| 2150 | fflush_all();
|
---|
| 2151 | //FIXME: correct timeout?
|
---|
| 2152 | ic = lineedit_read_key(read_key_buffer, -1);
|
---|
| 2153 |
|
---|
| 2154 | switch (ic) {
|
---|
| 2155 | case CTRL('R'): /* searching for the next match */
|
---|
| 2156 | break;
|
---|
| 2157 |
|
---|
| 2158 | case '\b':
|
---|
| 2159 | case '\x7f':
|
---|
| 2160 | /* Backspace */
|
---|
| 2161 | if (unicode_status == UNICODE_ON) {
|
---|
| 2162 | while (match_buf_len != 0) {
|
---|
| 2163 | uint8_t c = match_buf[--match_buf_len];
|
---|
| 2164 | if ((c & 0xc0) != 0x80) /* start of UTF-8 char? */
|
---|
| 2165 | break; /* yes */
|
---|
| 2166 | }
|
---|
| 2167 | } else {
|
---|
| 2168 | if (match_buf_len != 0)
|
---|
| 2169 | match_buf_len--;
|
---|
| 2170 | }
|
---|
| 2171 | match_buf[match_buf_len] = '\0';
|
---|
| 2172 | break;
|
---|
| 2173 |
|
---|
| 2174 | default:
|
---|
| 2175 | if (ic < ' '
|
---|
| 2176 | || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
|
---|
| 2177 | || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
|
---|
| 2178 | ) {
|
---|
| 2179 | goto ret;
|
---|
| 2180 | }
|
---|
| 2181 |
|
---|
| 2182 | /* Append this char */
|
---|
| 2183 | #if ENABLE_UNICODE_SUPPORT
|
---|
| 2184 | if (unicode_status == UNICODE_ON) {
|
---|
| 2185 | mbstate_t mbstate = { 0 };
|
---|
| 2186 | char buf[MB_CUR_MAX + 1];
|
---|
| 2187 | int len = wcrtomb(buf, ic, &mbstate);
|
---|
| 2188 | if (len > 0) {
|
---|
| 2189 | buf[len] = '\0';
|
---|
| 2190 | if (match_buf_len + len < sizeof(match_buf))
|
---|
| 2191 | strcpy(match_buf + match_buf_len, buf);
|
---|
| 2192 | }
|
---|
| 2193 | } else
|
---|
| 2194 | #endif
|
---|
| 2195 | if (match_buf_len < sizeof(match_buf) - 1) {
|
---|
| 2196 | match_buf[match_buf_len] = ic;
|
---|
| 2197 | match_buf[match_buf_len + 1] = '\0';
|
---|
| 2198 | }
|
---|
| 2199 | break;
|
---|
| 2200 | } /* switch (ic) */
|
---|
| 2201 |
|
---|
| 2202 | /* Search in history for match_buf */
|
---|
| 2203 | h = state->cur_history;
|
---|
| 2204 | if (ic == CTRL('R'))
|
---|
| 2205 | h--;
|
---|
| 2206 | while (h >= 0) {
|
---|
| 2207 | if (state->history[h]) {
|
---|
| 2208 | char *match = strstr(state->history[h], match_buf);
|
---|
| 2209 | if (match) {
|
---|
| 2210 | state->cur_history = h;
|
---|
| 2211 | matched_history_line = state->history[h];
|
---|
| 2212 | command_len = load_string(matched_history_line);
|
---|
| 2213 | cursor = match - matched_history_line;
|
---|
| 2214 | //FIXME: cursor position for Unicode case
|
---|
| 2215 |
|
---|
| 2216 | free((char*)cmdedit_prompt);
|
---|
| 2217 | set_prompt:
|
---|
| 2218 | cmdedit_prompt = xasprintf("(reverse-i-search)'%s': ", match_buf);
|
---|
[3621] | 2219 | cmdedit_prmt_len = unicode_strwidth(cmdedit_prompt);
|
---|
[3232] | 2220 | goto do_redraw;
|
---|
| 2221 | }
|
---|
| 2222 | }
|
---|
| 2223 | h--;
|
---|
| 2224 | }
|
---|
| 2225 |
|
---|
| 2226 | /* Not found */
|
---|
| 2227 | match_buf[match_buf_len] = '\0';
|
---|
| 2228 | beep();
|
---|
| 2229 | continue;
|
---|
| 2230 |
|
---|
| 2231 | do_redraw:
|
---|
| 2232 | redraw(cmdedit_y, command_len - cursor);
|
---|
| 2233 | } /* while (1) */
|
---|
| 2234 |
|
---|
| 2235 | ret:
|
---|
| 2236 | if (matched_history_line)
|
---|
| 2237 | command_len = load_string(matched_history_line);
|
---|
| 2238 |
|
---|
| 2239 | free((char*)cmdedit_prompt);
|
---|
| 2240 | cmdedit_prompt = saved_prompt;
|
---|
[3621] | 2241 | cmdedit_prmt_len = saved_prmt_len;
|
---|
[3232] | 2242 | redraw(cmdedit_y, command_len - cursor);
|
---|
| 2243 |
|
---|
| 2244 | return ic;
|
---|
| 2245 | }
|
---|
| 2246 | #endif
|
---|
| 2247 |
|
---|
[2725] | 2248 | /* maxsize must be >= 2.
|
---|
| 2249 | * Returns:
|
---|
| 2250 | * -1 on read errors or EOF, or on bare Ctrl-D,
|
---|
| 2251 | * 0 on ctrl-C (the line entered is still returned in 'command'),
|
---|
[1765] | 2252 | * >0 length of input string, including terminating '\n'
|
---|
| 2253 | */
|
---|
[3232] | 2254 | int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout)
|
---|
[1765] | 2255 | {
|
---|
[2725] | 2256 | int len;
|
---|
| 2257 | #if ENABLE_FEATURE_TAB_COMPLETION
|
---|
| 2258 | smallint lastWasTab = 0;
|
---|
| 2259 | #endif
|
---|
[1765] | 2260 | smallint break_out = 0;
|
---|
| 2261 | #if ENABLE_FEATURE_EDITING_VI
|
---|
| 2262 | smallint vi_cmdmode = 0;
|
---|
| 2263 | #endif
|
---|
[2725] | 2264 | struct termios initial_settings;
|
---|
| 2265 | struct termios new_settings;
|
---|
| 2266 | char read_key_buffer[KEYCODE_BUFFER_SIZE];
|
---|
[1765] | 2267 |
|
---|
[2725] | 2268 | INIT_S();
|
---|
| 2269 |
|
---|
| 2270 | if (tcgetattr(STDIN_FILENO, &initial_settings) < 0
|
---|
[3621] | 2271 | || (initial_settings.c_lflag & (ECHO|ICANON)) == ICANON
|
---|
[2725] | 2272 | ) {
|
---|
[3621] | 2273 | /* Happens when e.g. stty -echo was run before.
|
---|
| 2274 | * But if ICANON is not set, we don't come here.
|
---|
| 2275 | * (example: interactive python ^Z-backgrounded,
|
---|
| 2276 | * tty is still in "raw mode").
|
---|
| 2277 | */
|
---|
[2725] | 2278 | parse_and_put_prompt(prompt);
|
---|
| 2279 | /* fflush_all(); - done by parse_and_put_prompt */
|
---|
| 2280 | if (fgets(command, maxsize, stdin) == NULL)
|
---|
| 2281 | len = -1; /* EOF or error */
|
---|
| 2282 | else
|
---|
| 2283 | len = strlen(command);
|
---|
| 2284 | DEINIT_S();
|
---|
| 2285 | return len;
|
---|
| 2286 | }
|
---|
| 2287 |
|
---|
| 2288 | init_unicode();
|
---|
| 2289 |
|
---|
[1765] | 2290 | // FIXME: audit & improve this
|
---|
| 2291 | if (maxsize > MAX_LINELEN)
|
---|
| 2292 | maxsize = MAX_LINELEN;
|
---|
[2725] | 2293 | S.maxsize = maxsize;
|
---|
[1765] | 2294 |
|
---|
[3232] | 2295 | /* With zero flags, no other fields are ever used */
|
---|
[1765] | 2296 | state = st ? st : (line_input_t*) &const_int_0;
|
---|
[2725] | 2297 | #if MAX_HISTORY > 0
|
---|
| 2298 | # if ENABLE_FEATURE_EDITING_SAVEHISTORY
|
---|
[3232] | 2299 | if (state->hist_file)
|
---|
[2725] | 2300 | if (state->cnt_history == 0)
|
---|
| 2301 | load_history(state);
|
---|
| 2302 | # endif
|
---|
| 2303 | if (state->flags & DO_HISTORY)
|
---|
| 2304 | state->cur_history = state->cnt_history;
|
---|
[1765] | 2305 | #endif
|
---|
| 2306 |
|
---|
| 2307 | /* prepare before init handlers */
|
---|
| 2308 | cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
|
---|
| 2309 | command_len = 0;
|
---|
[2725] | 2310 | #if ENABLE_UNICODE_SUPPORT
|
---|
| 2311 | command_ps = xzalloc(maxsize * sizeof(command_ps[0]));
|
---|
| 2312 | #else
|
---|
[1765] | 2313 | command_ps = command;
|
---|
| 2314 | command[0] = '\0';
|
---|
[2725] | 2315 | #endif
|
---|
| 2316 | #define command command_must_not_be_used
|
---|
[1765] | 2317 |
|
---|
[2725] | 2318 | new_settings = initial_settings;
|
---|
[3232] | 2319 | /* ~ICANON: unbuffered input (most c_cc[] are disabled, VMIN/VTIME are enabled) */
|
---|
| 2320 | /* ~ECHO, ~ECHONL: turn off echoing, including newline echoing */
|
---|
| 2321 | /* ~ISIG: turn off INTR (ctrl-C), QUIT, SUSP */
|
---|
| 2322 | new_settings.c_lflag &= ~(ICANON | ECHO | ECHONL | ISIG);
|
---|
| 2323 | /* reads would block only if < 1 char is available */
|
---|
[1765] | 2324 | new_settings.c_cc[VMIN] = 1;
|
---|
[3232] | 2325 | /* no timeout (reads block forever) */
|
---|
[1765] | 2326 | new_settings.c_cc[VTIME] = 0;
|
---|
[3232] | 2327 | /* Should be not needed if ISIG is off: */
|
---|
| 2328 | /* Turn off CTRL-C */
|
---|
| 2329 | /* new_settings.c_cc[VINTR] = _POSIX_VDISABLE; */
|
---|
[2725] | 2330 | tcsetattr_stdin_TCSANOW(&new_settings);
|
---|
[1765] | 2331 |
|
---|
[2725] | 2332 | #if ENABLE_USERNAME_OR_HOMEDIR
|
---|
[1765] | 2333 | {
|
---|
| 2334 | struct passwd *entry;
|
---|
| 2335 |
|
---|
| 2336 | entry = getpwuid(geteuid());
|
---|
| 2337 | if (entry) {
|
---|
| 2338 | user_buf = xstrdup(entry->pw_name);
|
---|
| 2339 | home_pwd_buf = xstrdup(entry->pw_dir);
|
---|
| 2340 | }
|
---|
| 2341 | }
|
---|
| 2342 | #endif
|
---|
| 2343 |
|
---|
[2725] | 2344 | #if 0
|
---|
[3232] | 2345 | for (i = 0; i <= state->max_history; i++)
|
---|
[2725] | 2346 | bb_error_msg("history[%d]:'%s'", i, state->history[i]);
|
---|
| 2347 | bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
|
---|
| 2348 | #endif
|
---|
| 2349 |
|
---|
| 2350 | /* Print out the command prompt, optionally ask where cursor is */
|
---|
| 2351 | parse_and_put_prompt(prompt);
|
---|
| 2352 | ask_terminal();
|
---|
| 2353 |
|
---|
[3232] | 2354 | /* Install window resize handler (NB: after *all* init is complete) */
|
---|
| 2355 | //FIXME: save entire sigaction!
|
---|
| 2356 | previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
|
---|
| 2357 | win_changed(0); /* get initial window size */
|
---|
| 2358 |
|
---|
[2725] | 2359 | read_key_buffer[0] = 0;
|
---|
[1765] | 2360 | while (1) {
|
---|
[2725] | 2361 | /*
|
---|
| 2362 | * The emacs and vi modes share much of the code in the big
|
---|
| 2363 | * command loop. Commands entered when in vi's command mode
|
---|
| 2364 | * (aka "escape mode") get an extra bit added to distinguish
|
---|
| 2365 | * them - this keeps them from being self-inserted. This
|
---|
| 2366 | * clutters the big switch a bit, but keeps all the code
|
---|
| 2367 | * in one place.
|
---|
| 2368 | */
|
---|
| 2369 | int32_t ic, ic_raw;
|
---|
[1765] | 2370 |
|
---|
[2725] | 2371 | fflush_all();
|
---|
[3232] | 2372 | ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
|
---|
[1765] | 2373 |
|
---|
[3232] | 2374 | #if ENABLE_FEATURE_REVERSE_SEARCH
|
---|
| 2375 | again:
|
---|
| 2376 | #endif
|
---|
[1765] | 2377 | #if ENABLE_FEATURE_EDITING_VI
|
---|
| 2378 | newdelflag = 1;
|
---|
[2725] | 2379 | if (vi_cmdmode) {
|
---|
| 2380 | /* btw, since KEYCODE_xxx are all < 0, this doesn't
|
---|
| 2381 | * change ic if it contains one of them: */
|
---|
| 2382 | ic |= VI_CMDMODE_BIT;
|
---|
| 2383 | }
|
---|
[1765] | 2384 | #endif
|
---|
[2725] | 2385 |
|
---|
[1765] | 2386 | switch (ic) {
|
---|
| 2387 | case '\n':
|
---|
| 2388 | case '\r':
|
---|
[2725] | 2389 | vi_case('\n'|VI_CMDMODE_BIT:)
|
---|
| 2390 | vi_case('\r'|VI_CMDMODE_BIT:)
|
---|
[1765] | 2391 | /* Enter */
|
---|
| 2392 | goto_new_line();
|
---|
| 2393 | break_out = 1;
|
---|
| 2394 | break;
|
---|
| 2395 | case CTRL('A'):
|
---|
[2725] | 2396 | vi_case('0'|VI_CMDMODE_BIT:)
|
---|
[1765] | 2397 | /* Control-a -- Beginning of line */
|
---|
| 2398 | input_backward(cursor);
|
---|
| 2399 | break;
|
---|
| 2400 | case CTRL('B'):
|
---|
[2725] | 2401 | vi_case('h'|VI_CMDMODE_BIT:)
|
---|
| 2402 | vi_case('\b'|VI_CMDMODE_BIT:) /* ^H */
|
---|
| 2403 | vi_case('\x7f'|VI_CMDMODE_BIT:) /* DEL */
|
---|
| 2404 | input_backward(1); /* Move back one character */
|
---|
[1765] | 2405 | break;
|
---|
| 2406 | case CTRL('E'):
|
---|
[2725] | 2407 | vi_case('$'|VI_CMDMODE_BIT:)
|
---|
[1765] | 2408 | /* Control-e -- End of line */
|
---|
[2725] | 2409 | put_till_end_and_adv_cursor();
|
---|
[1765] | 2410 | break;
|
---|
| 2411 | case CTRL('F'):
|
---|
[2725] | 2412 | vi_case('l'|VI_CMDMODE_BIT:)
|
---|
| 2413 | vi_case(' '|VI_CMDMODE_BIT:)
|
---|
| 2414 | input_forward(); /* Move forward one character */
|
---|
[1765] | 2415 | break;
|
---|
[2725] | 2416 | case '\b': /* ^H */
|
---|
[1765] | 2417 | case '\x7f': /* DEL */
|
---|
[2725] | 2418 | if (!isrtl_str())
|
---|
| 2419 | input_backspace();
|
---|
| 2420 | else
|
---|
| 2421 | input_delete(0);
|
---|
[1765] | 2422 | break;
|
---|
[2725] | 2423 | case KEYCODE_DELETE:
|
---|
| 2424 | if (!isrtl_str())
|
---|
| 2425 | input_delete(0);
|
---|
| 2426 | else
|
---|
| 2427 | input_backspace();
|
---|
| 2428 | break;
|
---|
| 2429 | #if ENABLE_FEATURE_TAB_COMPLETION
|
---|
[1765] | 2430 | case '\t':
|
---|
| 2431 | input_tab(&lastWasTab);
|
---|
| 2432 | break;
|
---|
[2725] | 2433 | #endif
|
---|
[1765] | 2434 | case CTRL('K'):
|
---|
| 2435 | /* Control-k -- clear to end of line */
|
---|
[2725] | 2436 | command_ps[cursor] = BB_NUL;
|
---|
[1765] | 2437 | command_len = cursor;
|
---|
[2725] | 2438 | printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
|
---|
[1765] | 2439 | break;
|
---|
| 2440 | case CTRL('L'):
|
---|
[2725] | 2441 | vi_case(CTRL('L')|VI_CMDMODE_BIT:)
|
---|
[1765] | 2442 | /* Control-l -- clear screen */
|
---|
[2725] | 2443 | printf(ESC"[H"); /* cursor to top,left */
|
---|
[1765] | 2444 | redraw(0, command_len - cursor);
|
---|
| 2445 | break;
|
---|
| 2446 | #if MAX_HISTORY > 0
|
---|
| 2447 | case CTRL('N'):
|
---|
[2725] | 2448 | vi_case(CTRL('N')|VI_CMDMODE_BIT:)
|
---|
| 2449 | vi_case('j'|VI_CMDMODE_BIT:)
|
---|
[1765] | 2450 | /* Control-n -- Get next command in history */
|
---|
| 2451 | if (get_next_history())
|
---|
| 2452 | goto rewrite_line;
|
---|
| 2453 | break;
|
---|
| 2454 | case CTRL('P'):
|
---|
[2725] | 2455 | vi_case(CTRL('P')|VI_CMDMODE_BIT:)
|
---|
| 2456 | vi_case('k'|VI_CMDMODE_BIT:)
|
---|
[1765] | 2457 | /* Control-p -- Get previous command from history */
|
---|
[2725] | 2458 | if (get_previous_history())
|
---|
[1765] | 2459 | goto rewrite_line;
|
---|
| 2460 | break;
|
---|
| 2461 | #endif
|
---|
| 2462 | case CTRL('U'):
|
---|
[2725] | 2463 | vi_case(CTRL('U')|VI_CMDMODE_BIT:)
|
---|
[1765] | 2464 | /* Control-U -- Clear line before cursor */
|
---|
| 2465 | if (cursor) {
|
---|
| 2466 | command_len -= cursor;
|
---|
[2725] | 2467 | memmove(command_ps, command_ps + cursor,
|
---|
| 2468 | (command_len + 1) * sizeof(command_ps[0]));
|
---|
[1765] | 2469 | redraw(cmdedit_y, command_len);
|
---|
| 2470 | }
|
---|
| 2471 | break;
|
---|
| 2472 | case CTRL('W'):
|
---|
[2725] | 2473 | vi_case(CTRL('W')|VI_CMDMODE_BIT:)
|
---|
[1765] | 2474 | /* Control-W -- Remove the last word */
|
---|
[2725] | 2475 | while (cursor > 0 && BB_isspace(command_ps[cursor-1]))
|
---|
[1765] | 2476 | input_backspace();
|
---|
[2725] | 2477 | while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
|
---|
[1765] | 2478 | input_backspace();
|
---|
| 2479 | break;
|
---|
[3232] | 2480 | #if ENABLE_FEATURE_REVERSE_SEARCH
|
---|
| 2481 | case CTRL('R'):
|
---|
| 2482 | ic = ic_raw = reverse_i_search();
|
---|
| 2483 | goto again;
|
---|
| 2484 | #endif
|
---|
[1765] | 2485 |
|
---|
| 2486 | #if ENABLE_FEATURE_EDITING_VI
|
---|
[2725] | 2487 | case 'i'|VI_CMDMODE_BIT:
|
---|
[1765] | 2488 | vi_cmdmode = 0;
|
---|
| 2489 | break;
|
---|
[2725] | 2490 | case 'I'|VI_CMDMODE_BIT:
|
---|
[1765] | 2491 | input_backward(cursor);
|
---|
| 2492 | vi_cmdmode = 0;
|
---|
| 2493 | break;
|
---|
[2725] | 2494 | case 'a'|VI_CMDMODE_BIT:
|
---|
[1765] | 2495 | input_forward();
|
---|
| 2496 | vi_cmdmode = 0;
|
---|
| 2497 | break;
|
---|
[2725] | 2498 | case 'A'|VI_CMDMODE_BIT:
|
---|
| 2499 | put_till_end_and_adv_cursor();
|
---|
[1765] | 2500 | vi_cmdmode = 0;
|
---|
| 2501 | break;
|
---|
[2725] | 2502 | case 'x'|VI_CMDMODE_BIT:
|
---|
[1765] | 2503 | input_delete(1);
|
---|
| 2504 | break;
|
---|
[2725] | 2505 | case 'X'|VI_CMDMODE_BIT:
|
---|
[1765] | 2506 | if (cursor > 0) {
|
---|
| 2507 | input_backward(1);
|
---|
| 2508 | input_delete(1);
|
---|
| 2509 | }
|
---|
| 2510 | break;
|
---|
[2725] | 2511 | case 'W'|VI_CMDMODE_BIT:
|
---|
| 2512 | vi_Word_motion(1);
|
---|
[1765] | 2513 | break;
|
---|
[2725] | 2514 | case 'w'|VI_CMDMODE_BIT:
|
---|
| 2515 | vi_word_motion(1);
|
---|
[1765] | 2516 | break;
|
---|
[2725] | 2517 | case 'E'|VI_CMDMODE_BIT:
|
---|
| 2518 | vi_End_motion();
|
---|
[1765] | 2519 | break;
|
---|
[2725] | 2520 | case 'e'|VI_CMDMODE_BIT:
|
---|
| 2521 | vi_end_motion();
|
---|
[1765] | 2522 | break;
|
---|
[2725] | 2523 | case 'B'|VI_CMDMODE_BIT:
|
---|
| 2524 | vi_Back_motion();
|
---|
[1765] | 2525 | break;
|
---|
[2725] | 2526 | case 'b'|VI_CMDMODE_BIT:
|
---|
| 2527 | vi_back_motion();
|
---|
[1765] | 2528 | break;
|
---|
[2725] | 2529 | case 'C'|VI_CMDMODE_BIT:
|
---|
[1765] | 2530 | vi_cmdmode = 0;
|
---|
| 2531 | /* fall through */
|
---|
[2725] | 2532 | case 'D'|VI_CMDMODE_BIT:
|
---|
[1765] | 2533 | goto clear_to_eol;
|
---|
| 2534 |
|
---|
[2725] | 2535 | case 'c'|VI_CMDMODE_BIT:
|
---|
[1765] | 2536 | vi_cmdmode = 0;
|
---|
| 2537 | /* fall through */
|
---|
[2725] | 2538 | case 'd'|VI_CMDMODE_BIT: {
|
---|
[1765] | 2539 | int nc, sc;
|
---|
[2725] | 2540 |
|
---|
[3232] | 2541 | ic = lineedit_read_key(read_key_buffer, timeout);
|
---|
[2725] | 2542 | if (errno) /* error */
|
---|
| 2543 | goto return_error_indicator;
|
---|
| 2544 | if (ic == ic_raw) { /* "cc", "dd" */
|
---|
[1765] | 2545 | input_backward(cursor);
|
---|
| 2546 | goto clear_to_eol;
|
---|
| 2547 | break;
|
---|
| 2548 | }
|
---|
[2725] | 2549 |
|
---|
| 2550 | sc = cursor;
|
---|
| 2551 | switch (ic) {
|
---|
[1765] | 2552 | case 'w':
|
---|
| 2553 | case 'W':
|
---|
| 2554 | case 'e':
|
---|
| 2555 | case 'E':
|
---|
[2725] | 2556 | switch (ic) {
|
---|
[1765] | 2557 | case 'w': /* "dw", "cw" */
|
---|
[2725] | 2558 | vi_word_motion(vi_cmdmode);
|
---|
[1765] | 2559 | break;
|
---|
| 2560 | case 'W': /* 'dW', 'cW' */
|
---|
[2725] | 2561 | vi_Word_motion(vi_cmdmode);
|
---|
[1765] | 2562 | break;
|
---|
| 2563 | case 'e': /* 'de', 'ce' */
|
---|
[2725] | 2564 | vi_end_motion();
|
---|
[1765] | 2565 | input_forward();
|
---|
| 2566 | break;
|
---|
| 2567 | case 'E': /* 'dE', 'cE' */
|
---|
[2725] | 2568 | vi_End_motion();
|
---|
[1765] | 2569 | input_forward();
|
---|
| 2570 | break;
|
---|
| 2571 | }
|
---|
| 2572 | nc = cursor;
|
---|
| 2573 | input_backward(cursor - sc);
|
---|
| 2574 | while (nc-- > cursor)
|
---|
| 2575 | input_delete(1);
|
---|
| 2576 | break;
|
---|
| 2577 | case 'b': /* "db", "cb" */
|
---|
| 2578 | case 'B': /* implemented as B */
|
---|
[2725] | 2579 | if (ic == 'b')
|
---|
| 2580 | vi_back_motion();
|
---|
[1765] | 2581 | else
|
---|
[2725] | 2582 | vi_Back_motion();
|
---|
[1765] | 2583 | while (sc-- > cursor)
|
---|
| 2584 | input_delete(1);
|
---|
| 2585 | break;
|
---|
| 2586 | case ' ': /* "d ", "c " */
|
---|
| 2587 | input_delete(1);
|
---|
| 2588 | break;
|
---|
| 2589 | case '$': /* "d$", "c$" */
|
---|
[2725] | 2590 | clear_to_eol:
|
---|
[1765] | 2591 | while (cursor < command_len)
|
---|
| 2592 | input_delete(1);
|
---|
| 2593 | break;
|
---|
| 2594 | }
|
---|
| 2595 | break;
|
---|
| 2596 | }
|
---|
[2725] | 2597 | case 'p'|VI_CMDMODE_BIT:
|
---|
[1765] | 2598 | input_forward();
|
---|
| 2599 | /* fallthrough */
|
---|
[2725] | 2600 | case 'P'|VI_CMDMODE_BIT:
|
---|
[1765] | 2601 | put();
|
---|
| 2602 | break;
|
---|
[2725] | 2603 | case 'r'|VI_CMDMODE_BIT:
|
---|
| 2604 | //FIXME: unicode case?
|
---|
[3232] | 2605 | ic = lineedit_read_key(read_key_buffer, timeout);
|
---|
[2725] | 2606 | if (errno) /* error */
|
---|
| 2607 | goto return_error_indicator;
|
---|
| 2608 | if (ic < ' ' || ic > 255) {
|
---|
[1765] | 2609 | beep();
|
---|
[2725] | 2610 | } else {
|
---|
| 2611 | command_ps[cursor] = ic;
|
---|
| 2612 | bb_putchar(ic);
|
---|
| 2613 | bb_putchar('\b');
|
---|
[1765] | 2614 | }
|
---|
| 2615 | break;
|
---|
| 2616 | case '\x1b': /* ESC */
|
---|
| 2617 | if (state->flags & VI_MODE) {
|
---|
[2725] | 2618 | /* insert mode --> command mode */
|
---|
[1765] | 2619 | vi_cmdmode = 1;
|
---|
| 2620 | input_backward(1);
|
---|
| 2621 | }
|
---|
[3232] | 2622 | /* Handle a few ESC-<key> combinations the same way
|
---|
| 2623 | * standard readline bindings (IOW: bash) do.
|
---|
| 2624 | * Often, Alt-<key> generates ESC-<key>.
|
---|
| 2625 | */
|
---|
[3621] | 2626 | ic = lineedit_read_key(read_key_buffer, 50);
|
---|
[3232] | 2627 | switch (ic) {
|
---|
| 2628 | //case KEYCODE_LEFT: - bash doesn't do this
|
---|
| 2629 | case 'b':
|
---|
| 2630 | ctrl_left();
|
---|
| 2631 | break;
|
---|
| 2632 | //case KEYCODE_RIGHT: - bash doesn't do this
|
---|
| 2633 | case 'f':
|
---|
| 2634 | ctrl_right();
|
---|
| 2635 | break;
|
---|
| 2636 | //case KEYCODE_DELETE: - bash doesn't do this
|
---|
| 2637 | case 'd': /* Alt-D */
|
---|
| 2638 | {
|
---|
| 2639 | /* Delete word forward */
|
---|
| 2640 | int nc, sc = cursor;
|
---|
| 2641 | ctrl_right();
|
---|
| 2642 | nc = cursor - sc;
|
---|
| 2643 | input_backward(nc);
|
---|
| 2644 | while (--nc >= 0)
|
---|
| 2645 | input_delete(1);
|
---|
| 2646 | break;
|
---|
| 2647 | }
|
---|
| 2648 | case '\b': /* Alt-Backspace(?) */
|
---|
| 2649 | case '\x7f': /* Alt-Backspace(?) */
|
---|
| 2650 | //case 'w': - bash doesn't do this
|
---|
| 2651 | {
|
---|
| 2652 | /* Delete word backward */
|
---|
| 2653 | int sc = cursor;
|
---|
| 2654 | ctrl_left();
|
---|
| 2655 | while (sc-- > cursor)
|
---|
| 2656 | input_delete(1);
|
---|
| 2657 | break;
|
---|
| 2658 | }
|
---|
| 2659 | }
|
---|
[2725] | 2660 | break;
|
---|
| 2661 | #endif /* FEATURE_COMMAND_EDITING_VI */
|
---|
[1765] | 2662 |
|
---|
| 2663 | #if MAX_HISTORY > 0
|
---|
[2725] | 2664 | case KEYCODE_UP:
|
---|
| 2665 | if (get_previous_history())
|
---|
| 2666 | goto rewrite_line;
|
---|
| 2667 | beep();
|
---|
| 2668 | break;
|
---|
| 2669 | case KEYCODE_DOWN:
|
---|
| 2670 | if (!get_next_history())
|
---|
[1765] | 2671 | break;
|
---|
| 2672 | rewrite_line:
|
---|
[2725] | 2673 | /* Rewrite the line with the selected history item */
|
---|
| 2674 | /* change command */
|
---|
| 2675 | command_len = load_string(state->history[state->cur_history] ?
|
---|
[3232] | 2676 | state->history[state->cur_history] : "");
|
---|
[2725] | 2677 | /* redraw and go to eol (bol, in vi) */
|
---|
| 2678 | redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
|
---|
| 2679 | break;
|
---|
[1765] | 2680 | #endif
|
---|
[2725] | 2681 | case KEYCODE_RIGHT:
|
---|
| 2682 | input_forward();
|
---|
| 2683 | break;
|
---|
| 2684 | case KEYCODE_LEFT:
|
---|
| 2685 | input_backward(1);
|
---|
| 2686 | break;
|
---|
| 2687 | case KEYCODE_CTRL_LEFT:
|
---|
[3232] | 2688 | case KEYCODE_ALT_LEFT: /* bash doesn't do it */
|
---|
[2725] | 2689 | ctrl_left();
|
---|
| 2690 | break;
|
---|
| 2691 | case KEYCODE_CTRL_RIGHT:
|
---|
[3232] | 2692 | case KEYCODE_ALT_RIGHT: /* bash doesn't do it */
|
---|
[2725] | 2693 | ctrl_right();
|
---|
| 2694 | break;
|
---|
| 2695 | case KEYCODE_HOME:
|
---|
| 2696 | input_backward(cursor);
|
---|
| 2697 | break;
|
---|
| 2698 | case KEYCODE_END:
|
---|
| 2699 | put_till_end_and_adv_cursor();
|
---|
| 2700 | break;
|
---|
| 2701 |
|
---|
| 2702 | default:
|
---|
| 2703 | if (initial_settings.c_cc[VINTR] != 0
|
---|
| 2704 | && ic_raw == initial_settings.c_cc[VINTR]
|
---|
| 2705 | ) {
|
---|
| 2706 | /* Ctrl-C (usually) - stop gathering input */
|
---|
| 2707 | goto_new_line();
|
---|
| 2708 | command_len = 0;
|
---|
| 2709 | break_out = -1; /* "do not append '\n'" */
|
---|
[1765] | 2710 | break;
|
---|
| 2711 | }
|
---|
[2725] | 2712 | if (initial_settings.c_cc[VEOF] != 0
|
---|
| 2713 | && ic_raw == initial_settings.c_cc[VEOF]
|
---|
| 2714 | ) {
|
---|
| 2715 | /* Ctrl-D (usually) - delete one character,
|
---|
| 2716 | * or exit if len=0 and no chars to delete */
|
---|
| 2717 | if (command_len == 0) {
|
---|
| 2718 | errno = 0;
|
---|
[1765] | 2719 |
|
---|
[2725] | 2720 | case -1: /* error (e.g. EIO when tty is destroyed) */
|
---|
| 2721 | IF_FEATURE_EDITING_VI(return_error_indicator:)
|
---|
| 2722 | break_out = command_len = -1;
|
---|
[1765] | 2723 | break;
|
---|
| 2724 | }
|
---|
[2725] | 2725 | input_delete(0);
|
---|
[1765] | 2726 | break;
|
---|
[2725] | 2727 | }
|
---|
| 2728 | // /* Control-V -- force insert of next char */
|
---|
| 2729 | // if (c == CTRL('V')) {
|
---|
| 2730 | // if (safe_read(STDIN_FILENO, &c, 1) < 1)
|
---|
| 2731 | // goto return_error_indicator;
|
---|
| 2732 | // if (c == 0) {
|
---|
| 2733 | // beep();
|
---|
| 2734 | // break;
|
---|
| 2735 | // }
|
---|
| 2736 | // }
|
---|
| 2737 | if (ic < ' '
|
---|
| 2738 | || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
|
---|
| 2739 | || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
|
---|
| 2740 | ) {
|
---|
| 2741 | /* If VI_CMDMODE_BIT is set, ic is >= 256
|
---|
| 2742 | * and vi mode ignores unexpected chars.
|
---|
| 2743 | * Otherwise, we are here if ic is a
|
---|
| 2744 | * control char or an unhandled ESC sequence,
|
---|
| 2745 | * which is also ignored.
|
---|
| 2746 | */
|
---|
[1765] | 2747 | break;
|
---|
[2725] | 2748 | }
|
---|
| 2749 | if ((int)command_len >= (maxsize - 2)) {
|
---|
| 2750 | /* Not enough space for the char and EOL */
|
---|
[1765] | 2751 | break;
|
---|
[2725] | 2752 | }
|
---|
[1765] | 2753 |
|
---|
| 2754 | command_len++;
|
---|
[2725] | 2755 | if (cursor == (command_len - 1)) {
|
---|
| 2756 | /* We are at the end, append */
|
---|
| 2757 | command_ps[cursor] = ic;
|
---|
| 2758 | command_ps[cursor + 1] = BB_NUL;
|
---|
| 2759 | put_cur_glyph_and_inc_cursor();
|
---|
| 2760 | if (unicode_bidi_isrtl(ic))
|
---|
| 2761 | input_backward(1);
|
---|
| 2762 | } else {
|
---|
| 2763 | /* In the middle, insert */
|
---|
[1765] | 2764 | int sc = cursor;
|
---|
| 2765 |
|
---|
[2725] | 2766 | memmove(command_ps + sc + 1, command_ps + sc,
|
---|
| 2767 | (command_len - sc) * sizeof(command_ps[0]));
|
---|
| 2768 | command_ps[sc] = ic;
|
---|
| 2769 | /* is right-to-left char, or neutral one (e.g. comma) was just added to rtl text? */
|
---|
| 2770 | if (!isrtl_str())
|
---|
| 2771 | sc++; /* no */
|
---|
| 2772 | put_till_end_and_adv_cursor();
|
---|
[1765] | 2773 | /* to prev x pos + 1 */
|
---|
| 2774 | input_backward(cursor - sc);
|
---|
| 2775 | }
|
---|
| 2776 | break;
|
---|
[2725] | 2777 | } /* switch (ic) */
|
---|
| 2778 |
|
---|
| 2779 | if (break_out)
|
---|
[1765] | 2780 | break;
|
---|
| 2781 |
|
---|
[2725] | 2782 | #if ENABLE_FEATURE_TAB_COMPLETION
|
---|
| 2783 | if (ic_raw != '\t')
|
---|
| 2784 | lastWasTab = 0;
|
---|
| 2785 | #endif
|
---|
| 2786 | } /* while (1) */
|
---|
| 2787 |
|
---|
| 2788 | #if ENABLE_FEATURE_EDITING_ASK_TERMINAL
|
---|
| 2789 | if (S.sent_ESC_br6n) {
|
---|
| 2790 | /* "sleep 1; busybox ash" + hold [Enter] to trigger.
|
---|
| 2791 | * We sent "ESC [ 6 n", but got '\n' first, and
|
---|
| 2792 | * KEYCODE_CURSOR_POS response is now buffered from terminal.
|
---|
| 2793 | * It's bad already and not much can be done with it
|
---|
| 2794 | * (it _will_ be visible for the next process to read stdin),
|
---|
| 2795 | * but without this delay it even shows up on the screen
|
---|
| 2796 | * as garbage because we restore echo settings with tcsetattr
|
---|
| 2797 | * before it comes in. UGLY!
|
---|
| 2798 | */
|
---|
| 2799 | usleep(20*1000);
|
---|
[1765] | 2800 | }
|
---|
[2725] | 2801 | #endif
|
---|
[1765] | 2802 |
|
---|
[2725] | 2803 | /* End of bug-catching "command_must_not_be_used" trick */
|
---|
| 2804 | #undef command
|
---|
| 2805 |
|
---|
| 2806 | #if ENABLE_UNICODE_SUPPORT
|
---|
| 2807 | command[0] = '\0';
|
---|
[1765] | 2808 | if (command_len > 0)
|
---|
[2725] | 2809 | command_len = save_string(command, maxsize - 1);
|
---|
| 2810 | free(command_ps);
|
---|
| 2811 | #endif
|
---|
| 2812 |
|
---|
[3621] | 2813 | if (command_len > 0) {
|
---|
[1765] | 2814 | remember_in_history(command);
|
---|
[3621] | 2815 | }
|
---|
[1765] | 2816 |
|
---|
| 2817 | if (break_out > 0) {
|
---|
| 2818 | command[command_len++] = '\n';
|
---|
| 2819 | command[command_len] = '\0';
|
---|
| 2820 | }
|
---|
| 2821 |
|
---|
[2725] | 2822 | #if ENABLE_FEATURE_TAB_COMPLETION
|
---|
[1765] | 2823 | free_tab_completion_data();
|
---|
| 2824 | #endif
|
---|
| 2825 |
|
---|
| 2826 | /* restore initial_settings */
|
---|
[2725] | 2827 | tcsetattr_stdin_TCSANOW(&initial_settings);
|
---|
[1765] | 2828 | /* restore SIGWINCH handler */
|
---|
| 2829 | signal(SIGWINCH, previous_SIGWINCH_handler);
|
---|
[2725] | 2830 | fflush_all();
|
---|
[1765] | 2831 |
|
---|
[2725] | 2832 | len = command_len;
|
---|
| 2833 | DEINIT_S();
|
---|
| 2834 |
|
---|
| 2835 | return len; /* can't return command_len, DEINIT_S() destroys it */
|
---|
[1765] | 2836 | }
|
---|
| 2837 |
|
---|
[2725] | 2838 | #else /* !FEATURE_EDITING */
|
---|
[1765] | 2839 |
|
---|
| 2840 | #undef read_line_input
|
---|
[2725] | 2841 | int FAST_FUNC read_line_input(const char* prompt, char* command, int maxsize)
|
---|
[1765] | 2842 | {
|
---|
| 2843 | fputs(prompt, stdout);
|
---|
[2725] | 2844 | fflush_all();
|
---|
[3232] | 2845 | if (!fgets(command, maxsize, stdin))
|
---|
| 2846 | return -1;
|
---|
[1765] | 2847 | return strlen(command);
|
---|
| 2848 | }
|
---|
| 2849 |
|
---|
[2725] | 2850 | #endif /* !FEATURE_EDITING */
|
---|
[1765] | 2851 |
|
---|
| 2852 |
|
---|
| 2853 | /*
|
---|
| 2854 | * Testing
|
---|
| 2855 | */
|
---|
| 2856 |
|
---|
| 2857 | #ifdef TEST
|
---|
| 2858 |
|
---|
| 2859 | #include <locale.h>
|
---|
| 2860 |
|
---|
| 2861 | const char *applet_name = "debug stuff usage";
|
---|
| 2862 |
|
---|
| 2863 | int main(int argc, char **argv)
|
---|
| 2864 | {
|
---|
| 2865 | char buff[MAX_LINELEN];
|
---|
| 2866 | char *prompt =
|
---|
| 2867 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
---|
| 2868 | "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
|
---|
| 2869 | "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
|
---|
| 2870 | "\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
|
---|
| 2871 | #else
|
---|
| 2872 | "% ";
|
---|
| 2873 | #endif
|
---|
| 2874 |
|
---|
| 2875 | while (1) {
|
---|
| 2876 | int l;
|
---|
| 2877 | l = read_line_input(prompt, buff);
|
---|
| 2878 | if (l <= 0 || buff[l-1] != '\n')
|
---|
| 2879 | break;
|
---|
[2725] | 2880 | buff[l-1] = '\0';
|
---|
[1765] | 2881 | printf("*** read_line_input() returned line =%s=\n", buff);
|
---|
| 2882 | }
|
---|
| 2883 | printf("*** read_line_input() detect ^D\n");
|
---|
| 2884 | return 0;
|
---|
| 2885 | }
|
---|
| 2886 |
|
---|
| 2887 | #endif /* TEST */
|
---|