1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Command line editing.
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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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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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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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49 | */
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50 | #include "busybox.h"
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51 | #include "NUM_APPLETS.h"
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52 | #include "unicode.h"
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53 | #ifndef _POSIX_VDISABLE
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54 | # define _POSIX_VDISABLE '\0'
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55 | #endif
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56 |
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57 |
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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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63 |
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64 |
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65 | /* Entire file (except TESTing part) sits inside this #if */
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66 | #if ENABLE_FEATURE_EDITING
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67 |
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68 |
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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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76 |
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77 |
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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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108 |
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109 |
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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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124 | #endif
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125 |
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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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129 |
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130 | volatile unsigned cmdedit_termw; /* = 80; */ /* actual terminal width */
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131 | sighandler_t previous_SIGWINCH_handler;
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132 |
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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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136 |
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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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143 |
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144 | const char *cmdedit_prompt;
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145 |
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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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150 |
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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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155 |
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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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194 | IF_FEATURE_EDITING_VI(delptr = delbuf;) \
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195 | } while (0)
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196 |
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197 | static void deinit_S(void)
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198 | {
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199 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
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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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203 | #endif
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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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212 |
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213 |
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214 | #if ENABLE_UNICODE_SUPPORT
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215 | static size_t load_string(const char *src)
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216 | {
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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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232 | }
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233 | static unsigned save_string(char *dst, unsigned maxsize)
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234 | {
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235 | if (unicode_status == UNICODE_ON) {
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236 | # if !ENABLE_UNICODE_PRESERVE_BROKEN
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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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242 | # else
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243 | unsigned dstpos = 0;
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244 | unsigned srcpos = 0;
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245 |
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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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250 |
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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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267 | srcpos++;
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268 | if (dstpos == maxsize)
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269 | break;
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270 | dst[dstpos++] = (char) wc;
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271 | }
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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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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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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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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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326 | #endif
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327 | return wc;
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328 | }
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329 | #else /* !UNICODE */
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330 | static size_t load_string(const char *src)
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331 | {
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332 | safe_strncpy(command_ps, src, S.maxsize);
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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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345 |
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346 |
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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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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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352 | {
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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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356 |
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357 | if (c == BB_NUL) {
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358 | /* erase character after end of input string */
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359 | c = ' ';
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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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370 | }
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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 */
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388 | puts("\r"); /* + implicit '\n' */
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389 | #else
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390 | /* VT-10x terminals don't wrap cursor to next line when last char
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391 | * on the line is printed - cursor stays "over" this char.
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392 | * Need to print _next_ char too (first one to appear on next line)
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393 | * to make cursor move down to next line.
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394 | */
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395 | /* Works ok only if cmdedit_termw is correct. */
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396 | c = command_ps[cursor];
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397 | if (c == BB_NUL)
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398 | c = ' ';
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399 | BB_PUTCHAR(c);
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400 | bb_putchar('\b');
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401 | #endif
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402 | cmdedit_y++;
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403 | if (!ENABLE_UNICODE_WIDE_WCHARS || ofs_to_right == 0) {
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404 | width = 0;
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405 | } else { /* ofs_to_right > 0 */
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406 | /* wide char c didn't fit on prev line */
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407 | BB_PUTCHAR(c);
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408 | }
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409 | cmdedit_x = width;
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410 | }
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411 | }
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412 |
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413 | /* Move to end of line (by printing all chars till the end) */
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414 | static void put_till_end_and_adv_cursor(void)
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415 | {
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416 | while (cursor < command_len)
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417 | put_cur_glyph_and_inc_cursor();
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418 | }
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419 |
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420 | /* Go to the next line */
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421 | static void goto_new_line(void)
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422 | {
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423 | put_till_end_and_adv_cursor();
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424 | if (cmdedit_x != 0)
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425 | bb_putchar('\n');
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426 | }
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427 |
|
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428 | static void beep(void)
|
---|
429 | {
|
---|
430 | bb_putchar('\007');
|
---|
431 | }
|
---|
432 |
|
---|
433 | static void put_prompt(void)
|
---|
434 | {
|
---|
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;
|
---|
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;
|
---|
451 | if (num == 0)
|
---|
452 | return;
|
---|
453 | cursor -= num;
|
---|
454 |
|
---|
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 |
|
---|
467 | if (cmdedit_x >= num) {
|
---|
468 | cmdedit_x -= num;
|
---|
469 | if (num <= 4) {
|
---|
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);
|
---|
479 | return;
|
---|
480 | }
|
---|
481 | printf(ESC"[%uD", num);
|
---|
482 | return;
|
---|
483 | }
|
---|
484 |
|
---|
485 | /* Need to go one or more lines up */
|
---|
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 | }
|
---|
530 | }
|
---|
531 |
|
---|
532 | /* draw prompt, editor line, and clear tail */
|
---|
533 | static void redraw(int y, int back_cursor)
|
---|
534 | {
|
---|
535 | if (y > 0) /* up y lines */
|
---|
536 | printf(ESC"[%uA", y);
|
---|
537 | bb_putchar('\r');
|
---|
538 | put_prompt();
|
---|
539 | put_till_end_and_adv_cursor();
|
---|
540 | printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
|
---|
541 | input_backward(back_cursor);
|
---|
542 | }
|
---|
543 |
|
---|
544 | /* Delete the char in front of the cursor, optionally saving it
|
---|
545 | * for later putback */
|
---|
546 | #if !ENABLE_FEATURE_EDITING_VI
|
---|
547 | static void input_delete(void)
|
---|
548 | #define input_delete(save) input_delete()
|
---|
549 | #else
|
---|
550 | static void input_delete(int save)
|
---|
551 | #endif
|
---|
552 | {
|
---|
553 | int j = cursor;
|
---|
554 |
|
---|
555 | if (j == (int)command_len)
|
---|
556 | return;
|
---|
557 |
|
---|
558 | #if ENABLE_FEATURE_EDITING_VI
|
---|
559 | if (save) {
|
---|
560 | if (newdelflag) {
|
---|
561 | delptr = delbuf;
|
---|
562 | newdelflag = 0;
|
---|
563 | }
|
---|
564 | if ((delptr - delbuf) < DELBUFSIZ)
|
---|
565 | *delptr++ = command_ps[j];
|
---|
566 | }
|
---|
567 | #endif
|
---|
568 |
|
---|
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]));
|
---|
573 | command_len--;
|
---|
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);
|
---|
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;
|
---|
584 | int j = delptr - delbuf;
|
---|
585 |
|
---|
586 | if (j == 0)
|
---|
587 | return;
|
---|
588 | ocursor = cursor;
|
---|
589 | /* open hole and then fill it */
|
---|
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]));
|
---|
593 | command_len += j;
|
---|
594 | put_till_end_and_adv_cursor();
|
---|
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)
|
---|
612 | put_cur_glyph_and_inc_cursor();
|
---|
613 | }
|
---|
614 |
|
---|
615 | #if ENABLE_FEATURE_TAB_COMPLETION
|
---|
616 |
|
---|
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>...
|
---|
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 | {
|
---|
635 | matches = xrealloc_vector(matches, 4, num_matches);
|
---|
636 | matches[num_matches] = matched;
|
---|
637 | num_matches++;
|
---|
638 | }
|
---|
639 |
|
---|
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)
|
---|
646 | {
|
---|
647 | struct passwd *entry;
|
---|
648 | char *tilde_name = ud;
|
---|
649 | char *home = NULL;
|
---|
650 |
|
---|
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 | }
|
---|
670 |
|
---|
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 | {
|
---|
676 | struct passwd *pw;
|
---|
677 | unsigned userlen;
|
---|
678 |
|
---|
679 | ud++; /* skip ~ */
|
---|
680 | userlen = strlen(ud);
|
---|
681 |
|
---|
682 | setpwent();
|
---|
683 | while ((pw = getpwent()) != NULL) {
|
---|
684 | /* Null usernames should result in all users as possible completions. */
|
---|
685 | if (/* !ud[0] || */ is_prefixed_with(pw->pw_name, ud)) {
|
---|
686 | add_match(xasprintf("~%s/", pw->pw_name));
|
---|
687 | }
|
---|
688 | }
|
---|
689 | endpwent(); /* don't keep password file open */
|
---|
690 |
|
---|
691 | return 1 + userlen;
|
---|
692 | }
|
---|
693 | # endif /* FEATURE_USERNAME_COMPLETION */
|
---|
694 |
|
---|
695 | enum {
|
---|
696 | FIND_EXE_ONLY = 0,
|
---|
697 | FIND_DIR_ONLY = 1,
|
---|
698 | FIND_FILE_ONLY = 2,
|
---|
699 | };
|
---|
700 |
|
---|
701 | static int path_parse(char ***p)
|
---|
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");
|
---|
712 |
|
---|
713 | /* PATH="" or PATH=":"? */
|
---|
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;
|
---|
723 | tmp++;
|
---|
724 | if (*tmp == '\0')
|
---|
725 | break; /* :<empty> */
|
---|
726 | npth++;
|
---|
727 | }
|
---|
728 |
|
---|
729 | *p = res = xmalloc(npth * sizeof(res[0]));
|
---|
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 |
|
---|
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)
|
---|
748 | {
|
---|
749 | char *path1[1];
|
---|
750 | char **paths = path1;
|
---|
751 | int npaths;
|
---|
752 | int i;
|
---|
753 | unsigned pf_len;
|
---|
754 | const char *pfind;
|
---|
755 | char *dirbuf = NULL;
|
---|
756 |
|
---|
757 | npaths = 1;
|
---|
758 | path1[0] = (char*)".";
|
---|
759 |
|
---|
760 | pfind = strrchr(command, '/');
|
---|
761 | if (!pfind) {
|
---|
762 | if (type == FIND_EXE_ONLY)
|
---|
763 | npaths = path_parse(&paths);
|
---|
764 | pfind = command;
|
---|
765 | } else {
|
---|
766 | /* point to 'l' in "..../last_component" */
|
---|
767 | pfind++;
|
---|
768 | /* dirbuf = ".../.../.../" */
|
---|
769 | dirbuf = xstrndup(command, pfind - command);
|
---|
770 | # if ENABLE_FEATURE_USERNAME_COMPLETION
|
---|
771 | if (dirbuf[0] == '~') /* ~/... or ~user/... */
|
---|
772 | dirbuf = username_path_completion(dirbuf);
|
---|
773 | # endif
|
---|
774 | path1[0] = dirbuf;
|
---|
775 | }
|
---|
776 | pf_len = strlen(pfind);
|
---|
777 |
|
---|
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 |
|
---|
791 | for (i = 0; i < npaths; i++) {
|
---|
792 | DIR *dir;
|
---|
793 | struct dirent *next;
|
---|
794 | struct stat st;
|
---|
795 | char *found;
|
---|
796 |
|
---|
797 | dir = opendir(paths[i]);
|
---|
798 | if (!dir)
|
---|
799 | continue; /* don't print an error */
|
---|
800 |
|
---|
801 | while ((next = readdir(dir)) != NULL) {
|
---|
802 | unsigned len;
|
---|
803 | const char *name_found = next->d_name;
|
---|
804 |
|
---|
805 | /* .../<tab>: bash 3.2.0 shows dotfiles, but not . and .. */
|
---|
806 | if (!pfind[0] && DOT_OR_DOTDOT(name_found))
|
---|
807 | continue;
|
---|
808 | /* match? */
|
---|
809 | if (!is_prefixed_with(name_found, pfind))
|
---|
810 | continue; /* no */
|
---|
811 |
|
---|
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? */
|
---|
818 |
|
---|
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 |
|
---|
824 | if (S_ISDIR(st.st_mode)) {
|
---|
825 | /* name is a directory, add slash */
|
---|
826 | found[len] = '/';
|
---|
827 | found[len + 1] = '\0';
|
---|
828 | } else {
|
---|
829 | /* skip files if looking for dirs only (example: cd) */
|
---|
830 | if (type == FIND_DIR_ONLY)
|
---|
831 | goto cont;
|
---|
832 | }
|
---|
833 | /* add it to the list */
|
---|
834 | add_match(found);
|
---|
835 | continue;
|
---|
836 | cont:
|
---|
837 | free(found);
|
---|
838 | }
|
---|
839 | closedir(dir);
|
---|
840 | } /* for every path */
|
---|
841 |
|
---|
842 | if (paths != path1) {
|
---|
843 | free(paths[0]); /* allocated memory is only in first member */
|
---|
844 | free(paths);
|
---|
845 | }
|
---|
846 | free(dirbuf);
|
---|
847 |
|
---|
848 | return pf_len;
|
---|
849 | }
|
---|
850 |
|
---|
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 | */
|
---|
862 | #define QUOT (UCHAR_MAX+1)
|
---|
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;
|
---|
868 |
|
---|
869 | while ((int_buf[beg] = int_buf[end]) != 0)
|
---|
870 | beg++, end++;
|
---|
871 |
|
---|
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)
|
---|
883 | {
|
---|
884 | int i, j;
|
---|
885 | int command_mode;
|
---|
886 | int16_t *int_buf = (int16_t*)match_buf;
|
---|
887 |
|
---|
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;
|
---|
902 | }
|
---|
903 | }
|
---|
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;
|
---|
921 | i++;
|
---|
922 | }
|
---|
923 | }
|
---|
924 |
|
---|
925 | /* Remove everything up to command delimiters:
|
---|
926 | * ';' ';;' '&' '|' '&&' '||',
|
---|
927 | * but careful with '>&' '<&' '>|'
|
---|
928 | */
|
---|
929 | for (i = 0; int_buf[i]; i++) {
|
---|
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;
|
---|
937 | }
|
---|
938 | remove_chunk(int_buf, 0, i + 1 + (cur == int_buf[i + 1]));
|
---|
939 | i = -1; /* back to square 1 */
|
---|
940 | }
|
---|
941 | }
|
---|
942 | /* Remove all `cmd` */
|
---|
943 | for (i = 0; int_buf[i]; i++) {
|
---|
944 | if (int_buf[i] == '`') {
|
---|
945 | for (j = i + 1; int_buf[j]; j++) {
|
---|
946 | if (int_buf[j] == '`') {
|
---|
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;
|
---|
954 | }
|
---|
955 | }
|
---|
956 | /* No closing ` - command mode, remove all up to ` */
|
---|
957 | remove_chunk(int_buf, 0, i + 1);
|
---|
958 | break;
|
---|
959 | next: ;
|
---|
960 | }
|
---|
961 | }
|
---|
962 |
|
---|
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++) {
|
---|
968 | if (int_buf[i] == '(' || int_buf[i] == '{') {
|
---|
969 | remove_chunk(int_buf, 0, i + 1);
|
---|
970 | i = -1; /* back to square 1 */
|
---|
971 | }
|
---|
972 | }
|
---|
973 |
|
---|
974 | /* Remove leading unquoted spaces */
|
---|
975 | for (i = 0; int_buf[i]; i++)
|
---|
976 | if (int_buf[i] != ' ')
|
---|
977 | break;
|
---|
978 | remove_chunk(int_buf, 0, i);
|
---|
979 |
|
---|
980 | /* Determine completion mode */
|
---|
981 | command_mode = FIND_EXE_ONLY;
|
---|
982 | for (i = 0; int_buf[i]; i++) {
|
---|
983 | if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
|
---|
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] == ' ' */
|
---|
989 | ) {
|
---|
990 | command_mode = FIND_DIR_ONLY;
|
---|
991 | } else {
|
---|
992 | command_mode = FIND_FILE_ONLY;
|
---|
993 | break;
|
---|
994 | }
|
---|
995 | }
|
---|
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;
|
---|
1002 | for (--i; i >= 0; i--) {
|
---|
1003 | int cur = int_buf[i];
|
---|
1004 | if (cur == ' ' || cur == '<' || cur == '>' || cur == '|' || cur == '&') {
|
---|
1005 | remove_chunk(int_buf, 0, i + 1);
|
---|
1006 | break;
|
---|
1007 | }
|
---|
1008 | }
|
---|
1009 |
|
---|
1010 | /* Convert back to string of _chars_ */
|
---|
1011 | i = 0;
|
---|
1012 | while ((match_buf[i] = int_buf[i]) != '\0')
|
---|
1013 | i++;
|
---|
1014 |
|
---|
1015 | if (dbg_bmp) printf("final match_buf:'%s'\n", match_buf);
|
---|
1016 |
|
---|
1017 | return command_mode;
|
---|
1018 | }
|
---|
1019 |
|
---|
1020 | /*
|
---|
1021 | * Display by column (original idea from ls applet,
|
---|
1022 | * very optimized by me [Vladimir] :)
|
---|
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 |
|
---|
1032 | /* find the longest file name - use that as the column width */
|
---|
1033 | for (row = 0; row < nrows; row++) {
|
---|
1034 | l = unicode_strwidth(matches[row]);
|
---|
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],
|
---|
1054 | (int)(column_width - unicode_strwidth(matches[n])), ""
|
---|
1055 | );
|
---|
1056 | }
|
---|
1057 | if (ENABLE_UNICODE_SUPPORT)
|
---|
1058 | puts(printable_string(NULL, matches[n]));
|
---|
1059 | else
|
---|
1060 | puts(matches[n]);
|
---|
1061 | }
|
---|
1062 | }
|
---|
1063 |
|
---|
1064 | static const char *is_special_char(char c)
|
---|
1065 | {
|
---|
1066 | return strchr(" `\"#$%^&*()=+{}[]:;'|\\<>", c);
|
---|
1067 | }
|
---|
1068 |
|
---|
1069 | static char *quote_special_chars(char *found)
|
---|
1070 | {
|
---|
1071 | int l = 0;
|
---|
1072 | char *s = xzalloc((strlen(found) + 1) * 2);
|
---|
1073 |
|
---|
1074 | while (*found) {
|
---|
1075 | if (is_special_char(*found))
|
---|
1076 | s[l++] = '\\';
|
---|
1077 | s[l++] = *found++;
|
---|
1078 | }
|
---|
1079 | /* s[l] = '\0'; - already is */
|
---|
1080 | return s;
|
---|
1081 | }
|
---|
1082 |
|
---|
1083 | /* Do TAB completion */
|
---|
1084 | static NOINLINE void input_tab(smallint *lastWasTab)
|
---|
1085 | {
|
---|
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
|
---|
1096 | if (!(state->flags & TAB_COMPLETION))
|
---|
1097 | return;
|
---|
1098 |
|
---|
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 | }
|
---|
1112 |
|
---|
1113 | *lastWasTab = 1;
|
---|
1114 | chosen_match = NULL;
|
---|
1115 |
|
---|
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);
|
---|
1134 |
|
---|
1135 | /* Free up any memory already allocated */
|
---|
1136 | free_tab_completion_data();
|
---|
1137 |
|
---|
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);
|
---|
1149 |
|
---|
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];
|
---|
1171 | }
|
---|
1172 | //}
|
---|
1173 | }
|
---|
1174 | matches[n++] = matches[i];
|
---|
1175 | num_matches = n;
|
---|
1176 | }
|
---|
1177 |
|
---|
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 | }
|
---|
1192 | }
|
---|
1193 | }
|
---|
1194 | stop:
|
---|
1195 | if (cp == chosen_match) { /* have unique prefix? */
|
---|
1196 | goto ret; /* no */
|
---|
1197 | }
|
---|
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;
|
---|
1206 |
|
---|
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';
|
---|
1212 | }
|
---|
1213 | }
|
---|
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);
|
---|
1245 | len = load_string(command);
|
---|
1246 | /* add match and tail */
|
---|
1247 | sprintf(&command[cursor_mb], "%s%s", chosen_match + match_pfx_len, match_buf);
|
---|
1248 | command_len = load_string(command);
|
---|
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);
|
---|
1260 | }
|
---|
1261 |
|
---|
1262 | #endif /* FEATURE_TAB_COMPLETION */
|
---|
1263 |
|
---|
1264 |
|
---|
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;
|
---|
1269 | #if MAX_HISTORY > 0
|
---|
1270 | n->max_history = MAX_HISTORY;
|
---|
1271 | #endif
|
---|
1272 | return n;
|
---|
1273 | }
|
---|
1274 |
|
---|
1275 |
|
---|
1276 | #if MAX_HISTORY > 0
|
---|
1277 |
|
---|
1278 | unsigned FAST_FUNC size_from_HISTFILESIZE(const char *hp)
|
---|
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 |
|
---|
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 |
|
---|
1309 | /* state->flags is already checked to be nonzero */
|
---|
1310 | static int get_previous_history(void)
|
---|
1311 | {
|
---|
1312 | if ((state->flags & DO_HISTORY) && state->cur_history) {
|
---|
1313 | save_command_ps_at_cur_history();
|
---|
1314 | state->cur_history--;
|
---|
1315 | return 1;
|
---|
1316 | }
|
---|
1317 | beep();
|
---|
1318 | return 0;
|
---|
1319 | }
|
---|
1320 |
|
---|
1321 | static int get_next_history(void)
|
---|
1322 | {
|
---|
1323 | if (state->flags & DO_HISTORY) {
|
---|
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;
|
---|
1327 | }
|
---|
1328 | }
|
---|
1329 | beep();
|
---|
1330 | return 0;
|
---|
1331 | }
|
---|
1332 |
|
---|
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 |
|
---|
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 |
|
---|
1361 | /* state->flags is already checked to be nonzero */
|
---|
1362 | static void load_history(line_input_t *st_parm)
|
---|
1363 | {
|
---|
1364 | char *temp_h[MAX_HISTORY];
|
---|
1365 | char *line;
|
---|
1366 | FILE *fp;
|
---|
1367 | unsigned idx, i, line_len;
|
---|
1368 |
|
---|
1369 | /* NB: do not trash old history if file can't be opened */
|
---|
1370 |
|
---|
1371 | fp = fopen_for_read(st_parm->hist_file);
|
---|
1372 | if (fp) {
|
---|
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 | }
|
---|
1379 |
|
---|
1380 | /* fill temp_h[], retaining only last MAX_HISTORY lines */
|
---|
1381 | memset(temp_h, 0, sizeof(temp_h));
|
---|
1382 | idx = 0;
|
---|
1383 | st_parm->cnt_history_in_file = 0;
|
---|
1384 | while ((line = xmalloc_fgetline(fp)) != NULL) {
|
---|
1385 | if (line[0] == '\0') {
|
---|
1386 | free(line);
|
---|
1387 | continue;
|
---|
1388 | }
|
---|
1389 | free(temp_h[idx]);
|
---|
1390 | temp_h[idx] = line;
|
---|
1391 | st_parm->cnt_history_in_file++;
|
---|
1392 | idx++;
|
---|
1393 | if (idx == st_parm->max_history)
|
---|
1394 | idx = 0;
|
---|
1395 | }
|
---|
1396 | fclose(fp);
|
---|
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++;
|
---|
1402 | if (idx == st_parm->max_history)
|
---|
1403 | idx = 0;
|
---|
1404 | }
|
---|
1405 | }
|
---|
1406 |
|
---|
1407 | /* copy temp_h[] to st_parm->history[] */
|
---|
1408 | for (i = 0; i < st_parm->max_history;) {
|
---|
1409 | line = temp_h[idx];
|
---|
1410 | if (!line)
|
---|
1411 | break;
|
---|
1412 | idx++;
|
---|
1413 | if (idx == st_parm->max_history)
|
---|
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;
|
---|
1421 | if (ENABLE_FEATURE_EDITING_SAVE_ON_EXIT)
|
---|
1422 | st_parm->cnt_history_in_file = i;
|
---|
1423 | }
|
---|
1424 | }
|
---|
1425 |
|
---|
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
|
---|
1469 | static void save_history(char *str)
|
---|
1470 | {
|
---|
1471 | int fd;
|
---|
1472 | int len, len2;
|
---|
1473 |
|
---|
1474 | if (!state->hist_file)
|
---|
1475 | return;
|
---|
1476 |
|
---|
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?" */
|
---|
1488 |
|
---|
1489 | /* did we write so much that history file needs trimming? */
|
---|
1490 | state->cnt_history_in_file++;
|
---|
1491 | if (state->cnt_history_in_file > state->max_history * 4) {
|
---|
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;
|
---|
1499 | st_temp->max_history = state->max_history;
|
---|
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());
|
---|
1504 | fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
|
---|
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;
|
---|
1515 | }
|
---|
1516 | free(new_name);
|
---|
1517 | free_line_input_t(st_temp);
|
---|
1518 | }
|
---|
1519 | }
|
---|
1520 | # endif
|
---|
1521 | # else
|
---|
1522 | # define load_history(a) ((void)0)
|
---|
1523 | # define save_history(a) ((void)0)
|
---|
1524 | # endif /* FEATURE_COMMAND_SAVEHISTORY */
|
---|
1525 |
|
---|
1526 | static void remember_in_history(char *str)
|
---|
1527 | {
|
---|
1528 | int i;
|
---|
1529 |
|
---|
1530 | if (!(state->flags & DO_HISTORY))
|
---|
1531 | return;
|
---|
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;
|
---|
1538 |
|
---|
1539 | free(state->history[state->max_history]); /* redundant, paranoia */
|
---|
1540 | state->history[state->max_history] = NULL; /* redundant, paranoia */
|
---|
1541 |
|
---|
1542 | /* If history[] is full, remove the oldest command */
|
---|
1543 | /* we need to keep history[state->max_history] empty, hence >=, not > */
|
---|
1544 | if (i >= state->max_history) {
|
---|
1545 | free(state->history[0]);
|
---|
1546 | for (i = 0; i < state->max_history-1; i++)
|
---|
1547 | state->history[i] = state->history[i+1];
|
---|
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
|
---|
1553 | }
|
---|
1554 | /* i <= state->max_history-1 */
|
---|
1555 | state->history[i++] = xstrdup(str);
|
---|
1556 | /* i <= state->max_history */
|
---|
1557 | state->cur_history = i;
|
---|
1558 | state->cnt_history = i;
|
---|
1559 | # if ENABLE_FEATURE_EDITING_SAVEHISTORY && !ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
|
---|
1560 | save_history(str);
|
---|
1561 | # endif
|
---|
1562 | }
|
---|
1563 |
|
---|
1564 | #else /* MAX_HISTORY == 0 */
|
---|
1565 | # define remember_in_history(a) ((void)0)
|
---|
1566 | #endif /* MAX_HISTORY */
|
---|
1567 |
|
---|
1568 |
|
---|
1569 | #if ENABLE_FEATURE_EDITING_VI
|
---|
1570 | /*
|
---|
1571 | * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
|
---|
1572 | */
|
---|
1573 | static void
|
---|
1574 | vi_Word_motion(int eat)
|
---|
1575 | {
|
---|
1576 | CHAR_T *command = command_ps;
|
---|
1577 |
|
---|
1578 | while (cursor < command_len && !BB_isspace(command[cursor]))
|
---|
1579 | input_forward();
|
---|
1580 | if (eat) while (cursor < command_len && BB_isspace(command[cursor]))
|
---|
1581 | input_forward();
|
---|
1582 | }
|
---|
1583 |
|
---|
1584 | static void
|
---|
1585 | vi_word_motion(int eat)
|
---|
1586 | {
|
---|
1587 | CHAR_T *command = command_ps;
|
---|
1588 |
|
---|
1589 | if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
|
---|
1590 | while (cursor < command_len
|
---|
1591 | && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
|
---|
1592 | ) {
|
---|
1593 | input_forward();
|
---|
1594 | }
|
---|
1595 | } else if (BB_ispunct(command[cursor])) {
|
---|
1596 | while (cursor < command_len && BB_ispunct(command[cursor+1]))
|
---|
1597 | input_forward();
|
---|
1598 | }
|
---|
1599 |
|
---|
1600 | if (cursor < command_len)
|
---|
1601 | input_forward();
|
---|
1602 |
|
---|
1603 | if (eat) {
|
---|
1604 | while (cursor < command_len && BB_isspace(command[cursor]))
|
---|
1605 | input_forward();
|
---|
1606 | }
|
---|
1607 | }
|
---|
1608 |
|
---|
1609 | static void
|
---|
1610 | vi_End_motion(void)
|
---|
1611 | {
|
---|
1612 | CHAR_T *command = command_ps;
|
---|
1613 |
|
---|
1614 | input_forward();
|
---|
1615 | while (cursor < command_len && BB_isspace(command[cursor]))
|
---|
1616 | input_forward();
|
---|
1617 | while (cursor < command_len-1 && !BB_isspace(command[cursor+1]))
|
---|
1618 | input_forward();
|
---|
1619 | }
|
---|
1620 |
|
---|
1621 | static void
|
---|
1622 | vi_end_motion(void)
|
---|
1623 | {
|
---|
1624 | CHAR_T *command = command_ps;
|
---|
1625 |
|
---|
1626 | if (cursor >= command_len-1)
|
---|
1627 | return;
|
---|
1628 | input_forward();
|
---|
1629 | while (cursor < command_len-1 && BB_isspace(command[cursor]))
|
---|
1630 | input_forward();
|
---|
1631 | if (cursor >= command_len-1)
|
---|
1632 | return;
|
---|
1633 | if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
|
---|
1634 | while (cursor < command_len-1
|
---|
1635 | && (BB_isalnum(command[cursor+1]) || command[cursor+1] == '_')
|
---|
1636 | ) {
|
---|
1637 | input_forward();
|
---|
1638 | }
|
---|
1639 | } else if (BB_ispunct(command[cursor])) {
|
---|
1640 | while (cursor < command_len-1 && BB_ispunct(command[cursor+1]))
|
---|
1641 | input_forward();
|
---|
1642 | }
|
---|
1643 | }
|
---|
1644 |
|
---|
1645 | static void
|
---|
1646 | vi_Back_motion(void)
|
---|
1647 | {
|
---|
1648 | CHAR_T *command = command_ps;
|
---|
1649 |
|
---|
1650 | while (cursor > 0 && BB_isspace(command[cursor-1]))
|
---|
1651 | input_backward(1);
|
---|
1652 | while (cursor > 0 && !BB_isspace(command[cursor-1]))
|
---|
1653 | input_backward(1);
|
---|
1654 | }
|
---|
1655 |
|
---|
1656 | static void
|
---|
1657 | vi_back_motion(void)
|
---|
1658 | {
|
---|
1659 | CHAR_T *command = command_ps;
|
---|
1660 |
|
---|
1661 | if (cursor <= 0)
|
---|
1662 | return;
|
---|
1663 | input_backward(1);
|
---|
1664 | while (cursor > 0 && BB_isspace(command[cursor]))
|
---|
1665 | input_backward(1);
|
---|
1666 | if (cursor <= 0)
|
---|
1667 | return;
|
---|
1668 | if (BB_isalnum(command[cursor]) || command[cursor] == '_') {
|
---|
1669 | while (cursor > 0
|
---|
1670 | && (BB_isalnum(command[cursor-1]) || command[cursor-1] == '_')
|
---|
1671 | ) {
|
---|
1672 | input_backward(1);
|
---|
1673 | }
|
---|
1674 | } else if (BB_ispunct(command[cursor])) {
|
---|
1675 | while (cursor > 0 && BB_ispunct(command[cursor-1]))
|
---|
1676 | input_backward(1);
|
---|
1677 | }
|
---|
1678 | }
|
---|
1679 | #endif
|
---|
1680 |
|
---|
1681 | /* Modelled after bash 4.0 behavior of Ctrl-<arrow> */
|
---|
1682 | static void ctrl_left(void)
|
---|
1683 | {
|
---|
1684 | CHAR_T *command = command_ps;
|
---|
1685 |
|
---|
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 |
|
---|
1734 | /*
|
---|
1735 | * read_line_input and its helpers
|
---|
1736 | */
|
---|
1737 |
|
---|
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!
|
---|
1766 | * poll([{fd=0, events=POLLIN}], 1, -1) = 1 ([{fd=0, revents=POLLIN}])
|
---|
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 |
|
---|
1783 | /* Called just once at read_line_input() init time */
|
---|
1784 | #if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
---|
1785 | static void parse_and_put_prompt(const char *prmt_ptr)
|
---|
1786 | {
|
---|
1787 | const char *p;
|
---|
1788 | cmdedit_prompt = prmt_ptr;
|
---|
1789 | p = strrchr(prmt_ptr, '\n');
|
---|
1790 | cmdedit_prmt_len = unicode_strwidth(p ? p+1 : prmt_ptr);
|
---|
1791 | put_prompt();
|
---|
1792 | }
|
---|
1793 | #else
|
---|
1794 | static void parse_and_put_prompt(const char *prmt_ptr)
|
---|
1795 | {
|
---|
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
|
---|
1801 | char flg_not_length = '[';
|
---|
1802 | char cbuf[2];
|
---|
1803 |
|
---|
1804 | /*cmdedit_prmt_len = 0; - already is */
|
---|
1805 |
|
---|
1806 | cbuf[1] = '\0'; /* never changes */
|
---|
1807 |
|
---|
1808 | while (*prmt_ptr) {
|
---|
1809 | char timebuf[sizeof("HH:MM:SS")];
|
---|
1810 | char *free_me = NULL;
|
---|
1811 | char *pbuf;
|
---|
1812 | char c;
|
---|
1813 |
|
---|
1814 | pbuf = cbuf;
|
---|
1815 | c = *prmt_ptr++;
|
---|
1816 | if (c == '\\') {
|
---|
1817 | const char *cp;
|
---|
1818 | int l;
|
---|
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 $0 (the portion following the final slash)
|
---|
1848 | * \V release of bash, version + patch level (e.g., 2.00.0)
|
---|
1849 | * \d date in "Weekday Month Date" format (e.g., "Tue May 26")
|
---|
1850 | * \D{format}
|
---|
1851 | * format is passed to strftime(3).
|
---|
1852 | * An empty format results in a locale-specific time representation.
|
---|
1853 | * The braces are required.
|
---|
1854 | * Mishandled by bb_process_escape_sequence:
|
---|
1855 | * \v version of bash (e.g., 2.00)
|
---|
1856 | */
|
---|
1857 | cp = prmt_ptr;
|
---|
1858 | c = *cp;
|
---|
1859 | if (c != 't') /* don't treat \t as tab */
|
---|
1860 | c = bb_process_escape_sequence(&prmt_ptr);
|
---|
1861 | if (prmt_ptr == cp) {
|
---|
1862 | if (*cp == '\0')
|
---|
1863 | break;
|
---|
1864 | c = *prmt_ptr++;
|
---|
1865 |
|
---|
1866 | switch (c) {
|
---|
1867 | # if ENABLE_USERNAME_OR_HOMEDIR
|
---|
1868 | case 'u':
|
---|
1869 | pbuf = user_buf ? user_buf : (char*)"";
|
---|
1870 | break;
|
---|
1871 | # endif
|
---|
1872 | case 'H':
|
---|
1873 | case 'h':
|
---|
1874 | pbuf = free_me = safe_gethostname();
|
---|
1875 | if (c == 'h')
|
---|
1876 | strchrnul(pbuf, '.')[0] = '\0';
|
---|
1877 | break;
|
---|
1878 | case '$':
|
---|
1879 | c = (geteuid() == 0 ? '#' : '$');
|
---|
1880 | break;
|
---|
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;
|
---|
1889 | # if ENABLE_USERNAME_OR_HOMEDIR
|
---|
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 | }
|
---|
1908 | }
|
---|
1909 | pbuf = cwd_buf;
|
---|
1910 | if (c == 'w')
|
---|
1911 | break;
|
---|
1912 | cp = strrchr(pbuf, '/');
|
---|
1913 | if (cp)
|
---|
1914 | pbuf = (char*)cp + 1;
|
---|
1915 | break;
|
---|
1916 | # endif
|
---|
1917 | // bb_process_escape_sequence does this now:
|
---|
1918 | // case 'e': case 'E': /* \e \E = \033 */
|
---|
1919 | // c = '\033';
|
---|
1920 | // break;
|
---|
1921 | case 'x': case 'X': {
|
---|
1922 | char buf2[4];
|
---|
1923 | for (l = 0; l < 3;) {
|
---|
1924 | unsigned h;
|
---|
1925 | buf2[l++] = *prmt_ptr;
|
---|
1926 | buf2[l] = '\0';
|
---|
1927 | h = strtoul(buf2, &pbuf, 16);
|
---|
1928 | if (h > UCHAR_MAX || (pbuf - buf2) < l) {
|
---|
1929 | buf2[--l] = '\0';
|
---|
1930 | break;
|
---|
1931 | }
|
---|
1932 | prmt_ptr++;
|
---|
1933 | }
|
---|
1934 | c = (char)strtoul(buf2, NULL, 16);
|
---|
1935 | if (c == 0)
|
---|
1936 | c = '?';
|
---|
1937 | pbuf = cbuf;
|
---|
1938 | break;
|
---|
1939 | }
|
---|
1940 | case '[': case ']':
|
---|
1941 | if (c == flg_not_length) {
|
---|
1942 | /* Toggle '['/']' hex 5b/5d */
|
---|
1943 | flg_not_length ^= 6;
|
---|
1944 | continue;
|
---|
1945 | }
|
---|
1946 | break;
|
---|
1947 | } /* switch */
|
---|
1948 | } /* if */
|
---|
1949 | } /* if */
|
---|
1950 | cbuf[0] = c;
|
---|
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);
|
---|
1967 | free(free_me);
|
---|
1968 | } /* while */
|
---|
1969 |
|
---|
1970 | # if ENABLE_USERNAME_OR_HOMEDIR
|
---|
1971 | if (cwd_buf != (char *)bb_msg_unknown)
|
---|
1972 | free(cwd_buf);
|
---|
1973 | # endif
|
---|
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);
|
---|
1987 | fflush_all();
|
---|
1988 | }
|
---|
1989 | }
|
---|
1990 |
|
---|
1991 | static void win_changed(int nsig)
|
---|
1992 | {
|
---|
1993 | int sv_errno = errno;
|
---|
1994 | unsigned width;
|
---|
1995 |
|
---|
1996 | get_terminal_width_height(0, &width, NULL);
|
---|
1997 | //FIXME: cmdedit_setwidth() -> redraw() -> printf() -> KABOOM! (we are in signal handler!)
|
---|
1998 | cmdedit_setwidth(width, /*redraw_flg:*/ nsig);
|
---|
1999 |
|
---|
2000 | errno = sv_errno;
|
---|
2001 | }
|
---|
2002 |
|
---|
2003 | static int lineedit_read_key(char *read_key_buffer, int timeout)
|
---|
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
|
---|
2010 |
|
---|
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 | }
|
---|
2027 |
|
---|
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;
|
---|
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 */
|
---|
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 |
|
---|
2104 | /* leave out the "vi-mode"-only case labels if vi editing isn't
|
---|
2105 | * configured. */
|
---|
2106 | #define vi_case(caselabel) IF_FEATURE_EDITING_VI(case caselabel)
|
---|
2107 |
|
---|
2108 | /* convert uppercase ascii to equivalent control char, for readability */
|
---|
2109 | #undef CTRL
|
---|
2110 | #define CTRL(a) ((a) & ~0x40)
|
---|
2111 |
|
---|
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;
|
---|
2134 | unsigned saved_prmt_len;
|
---|
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;
|
---|
2143 | saved_prmt_len = cmdedit_prmt_len;
|
---|
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);
|
---|
2219 | cmdedit_prmt_len = unicode_strwidth(cmdedit_prompt);
|
---|
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;
|
---|
2241 | cmdedit_prmt_len = saved_prmt_len;
|
---|
2242 | redraw(cmdedit_y, command_len - cursor);
|
---|
2243 |
|
---|
2244 | return ic;
|
---|
2245 | }
|
---|
2246 | #endif
|
---|
2247 |
|
---|
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'),
|
---|
2252 | * >0 length of input string, including terminating '\n'
|
---|
2253 | */
|
---|
2254 | int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout)
|
---|
2255 | {
|
---|
2256 | int len;
|
---|
2257 | #if ENABLE_FEATURE_TAB_COMPLETION
|
---|
2258 | smallint lastWasTab = 0;
|
---|
2259 | #endif
|
---|
2260 | smallint break_out = 0;
|
---|
2261 | #if ENABLE_FEATURE_EDITING_VI
|
---|
2262 | smallint vi_cmdmode = 0;
|
---|
2263 | #endif
|
---|
2264 | struct termios initial_settings;
|
---|
2265 | struct termios new_settings;
|
---|
2266 | char read_key_buffer[KEYCODE_BUFFER_SIZE];
|
---|
2267 |
|
---|
2268 | INIT_S();
|
---|
2269 |
|
---|
2270 | if (tcgetattr(STDIN_FILENO, &initial_settings) < 0
|
---|
2271 | || (initial_settings.c_lflag & (ECHO|ICANON)) == ICANON
|
---|
2272 | ) {
|
---|
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 | */
|
---|
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 |
|
---|
2290 | // FIXME: audit & improve this
|
---|
2291 | if (maxsize > MAX_LINELEN)
|
---|
2292 | maxsize = MAX_LINELEN;
|
---|
2293 | S.maxsize = maxsize;
|
---|
2294 |
|
---|
2295 | /* With zero flags, no other fields are ever used */
|
---|
2296 | state = st ? st : (line_input_t*) &const_int_0;
|
---|
2297 | #if MAX_HISTORY > 0
|
---|
2298 | # if ENABLE_FEATURE_EDITING_SAVEHISTORY
|
---|
2299 | if (state->hist_file)
|
---|
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;
|
---|
2305 | #endif
|
---|
2306 |
|
---|
2307 | /* prepare before init handlers */
|
---|
2308 | cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
|
---|
2309 | command_len = 0;
|
---|
2310 | #if ENABLE_UNICODE_SUPPORT
|
---|
2311 | command_ps = xzalloc(maxsize * sizeof(command_ps[0]));
|
---|
2312 | #else
|
---|
2313 | command_ps = command;
|
---|
2314 | command[0] = '\0';
|
---|
2315 | #endif
|
---|
2316 | #define command command_must_not_be_used
|
---|
2317 |
|
---|
2318 | new_settings = initial_settings;
|
---|
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 */
|
---|
2324 | new_settings.c_cc[VMIN] = 1;
|
---|
2325 | /* no timeout (reads block forever) */
|
---|
2326 | new_settings.c_cc[VTIME] = 0;
|
---|
2327 | /* Should be not needed if ISIG is off: */
|
---|
2328 | /* Turn off CTRL-C */
|
---|
2329 | /* new_settings.c_cc[VINTR] = _POSIX_VDISABLE; */
|
---|
2330 | tcsetattr_stdin_TCSANOW(&new_settings);
|
---|
2331 |
|
---|
2332 | #if ENABLE_USERNAME_OR_HOMEDIR
|
---|
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 |
|
---|
2344 | #if 0
|
---|
2345 | for (i = 0; i <= state->max_history; i++)
|
---|
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 |
|
---|
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 |
|
---|
2359 | read_key_buffer[0] = 0;
|
---|
2360 | while (1) {
|
---|
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;
|
---|
2370 |
|
---|
2371 | fflush_all();
|
---|
2372 | ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
|
---|
2373 |
|
---|
2374 | #if ENABLE_FEATURE_REVERSE_SEARCH
|
---|
2375 | again:
|
---|
2376 | #endif
|
---|
2377 | #if ENABLE_FEATURE_EDITING_VI
|
---|
2378 | newdelflag = 1;
|
---|
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 | }
|
---|
2384 | #endif
|
---|
2385 |
|
---|
2386 | switch (ic) {
|
---|
2387 | case '\n':
|
---|
2388 | case '\r':
|
---|
2389 | vi_case('\n'|VI_CMDMODE_BIT:)
|
---|
2390 | vi_case('\r'|VI_CMDMODE_BIT:)
|
---|
2391 | /* Enter */
|
---|
2392 | goto_new_line();
|
---|
2393 | break_out = 1;
|
---|
2394 | break;
|
---|
2395 | case CTRL('A'):
|
---|
2396 | vi_case('0'|VI_CMDMODE_BIT:)
|
---|
2397 | /* Control-a -- Beginning of line */
|
---|
2398 | input_backward(cursor);
|
---|
2399 | break;
|
---|
2400 | case CTRL('B'):
|
---|
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 */
|
---|
2405 | break;
|
---|
2406 | case CTRL('E'):
|
---|
2407 | vi_case('$'|VI_CMDMODE_BIT:)
|
---|
2408 | /* Control-e -- End of line */
|
---|
2409 | put_till_end_and_adv_cursor();
|
---|
2410 | break;
|
---|
2411 | case CTRL('F'):
|
---|
2412 | vi_case('l'|VI_CMDMODE_BIT:)
|
---|
2413 | vi_case(' '|VI_CMDMODE_BIT:)
|
---|
2414 | input_forward(); /* Move forward one character */
|
---|
2415 | break;
|
---|
2416 | case '\b': /* ^H */
|
---|
2417 | case '\x7f': /* DEL */
|
---|
2418 | if (!isrtl_str())
|
---|
2419 | input_backspace();
|
---|
2420 | else
|
---|
2421 | input_delete(0);
|
---|
2422 | break;
|
---|
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
|
---|
2430 | case '\t':
|
---|
2431 | input_tab(&lastWasTab);
|
---|
2432 | break;
|
---|
2433 | #endif
|
---|
2434 | case CTRL('K'):
|
---|
2435 | /* Control-k -- clear to end of line */
|
---|
2436 | command_ps[cursor] = BB_NUL;
|
---|
2437 | command_len = cursor;
|
---|
2438 | printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
|
---|
2439 | break;
|
---|
2440 | case CTRL('L'):
|
---|
2441 | vi_case(CTRL('L')|VI_CMDMODE_BIT:)
|
---|
2442 | /* Control-l -- clear screen */
|
---|
2443 | printf(ESC"[H"); /* cursor to top,left */
|
---|
2444 | redraw(0, command_len - cursor);
|
---|
2445 | break;
|
---|
2446 | #if MAX_HISTORY > 0
|
---|
2447 | case CTRL('N'):
|
---|
2448 | vi_case(CTRL('N')|VI_CMDMODE_BIT:)
|
---|
2449 | vi_case('j'|VI_CMDMODE_BIT:)
|
---|
2450 | /* Control-n -- Get next command in history */
|
---|
2451 | if (get_next_history())
|
---|
2452 | goto rewrite_line;
|
---|
2453 | break;
|
---|
2454 | case CTRL('P'):
|
---|
2455 | vi_case(CTRL('P')|VI_CMDMODE_BIT:)
|
---|
2456 | vi_case('k'|VI_CMDMODE_BIT:)
|
---|
2457 | /* Control-p -- Get previous command from history */
|
---|
2458 | if (get_previous_history())
|
---|
2459 | goto rewrite_line;
|
---|
2460 | break;
|
---|
2461 | #endif
|
---|
2462 | case CTRL('U'):
|
---|
2463 | vi_case(CTRL('U')|VI_CMDMODE_BIT:)
|
---|
2464 | /* Control-U -- Clear line before cursor */
|
---|
2465 | if (cursor) {
|
---|
2466 | command_len -= cursor;
|
---|
2467 | memmove(command_ps, command_ps + cursor,
|
---|
2468 | (command_len + 1) * sizeof(command_ps[0]));
|
---|
2469 | redraw(cmdedit_y, command_len);
|
---|
2470 | }
|
---|
2471 | break;
|
---|
2472 | case CTRL('W'):
|
---|
2473 | vi_case(CTRL('W')|VI_CMDMODE_BIT:)
|
---|
2474 | /* Control-W -- Remove the last word */
|
---|
2475 | while (cursor > 0 && BB_isspace(command_ps[cursor-1]))
|
---|
2476 | input_backspace();
|
---|
2477 | while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
|
---|
2478 | input_backspace();
|
---|
2479 | break;
|
---|
2480 | #if ENABLE_FEATURE_REVERSE_SEARCH
|
---|
2481 | case CTRL('R'):
|
---|
2482 | ic = ic_raw = reverse_i_search();
|
---|
2483 | goto again;
|
---|
2484 | #endif
|
---|
2485 |
|
---|
2486 | #if ENABLE_FEATURE_EDITING_VI
|
---|
2487 | case 'i'|VI_CMDMODE_BIT:
|
---|
2488 | vi_cmdmode = 0;
|
---|
2489 | break;
|
---|
2490 | case 'I'|VI_CMDMODE_BIT:
|
---|
2491 | input_backward(cursor);
|
---|
2492 | vi_cmdmode = 0;
|
---|
2493 | break;
|
---|
2494 | case 'a'|VI_CMDMODE_BIT:
|
---|
2495 | input_forward();
|
---|
2496 | vi_cmdmode = 0;
|
---|
2497 | break;
|
---|
2498 | case 'A'|VI_CMDMODE_BIT:
|
---|
2499 | put_till_end_and_adv_cursor();
|
---|
2500 | vi_cmdmode = 0;
|
---|
2501 | break;
|
---|
2502 | case 'x'|VI_CMDMODE_BIT:
|
---|
2503 | input_delete(1);
|
---|
2504 | break;
|
---|
2505 | case 'X'|VI_CMDMODE_BIT:
|
---|
2506 | if (cursor > 0) {
|
---|
2507 | input_backward(1);
|
---|
2508 | input_delete(1);
|
---|
2509 | }
|
---|
2510 | break;
|
---|
2511 | case 'W'|VI_CMDMODE_BIT:
|
---|
2512 | vi_Word_motion(1);
|
---|
2513 | break;
|
---|
2514 | case 'w'|VI_CMDMODE_BIT:
|
---|
2515 | vi_word_motion(1);
|
---|
2516 | break;
|
---|
2517 | case 'E'|VI_CMDMODE_BIT:
|
---|
2518 | vi_End_motion();
|
---|
2519 | break;
|
---|
2520 | case 'e'|VI_CMDMODE_BIT:
|
---|
2521 | vi_end_motion();
|
---|
2522 | break;
|
---|
2523 | case 'B'|VI_CMDMODE_BIT:
|
---|
2524 | vi_Back_motion();
|
---|
2525 | break;
|
---|
2526 | case 'b'|VI_CMDMODE_BIT:
|
---|
2527 | vi_back_motion();
|
---|
2528 | break;
|
---|
2529 | case 'C'|VI_CMDMODE_BIT:
|
---|
2530 | vi_cmdmode = 0;
|
---|
2531 | /* fall through */
|
---|
2532 | case 'D'|VI_CMDMODE_BIT:
|
---|
2533 | goto clear_to_eol;
|
---|
2534 |
|
---|
2535 | case 'c'|VI_CMDMODE_BIT:
|
---|
2536 | vi_cmdmode = 0;
|
---|
2537 | /* fall through */
|
---|
2538 | case 'd'|VI_CMDMODE_BIT: {
|
---|
2539 | int nc, sc;
|
---|
2540 |
|
---|
2541 | ic = lineedit_read_key(read_key_buffer, timeout);
|
---|
2542 | if (errno) /* error */
|
---|
2543 | goto return_error_indicator;
|
---|
2544 | if (ic == ic_raw) { /* "cc", "dd" */
|
---|
2545 | input_backward(cursor);
|
---|
2546 | goto clear_to_eol;
|
---|
2547 | break;
|
---|
2548 | }
|
---|
2549 |
|
---|
2550 | sc = cursor;
|
---|
2551 | switch (ic) {
|
---|
2552 | case 'w':
|
---|
2553 | case 'W':
|
---|
2554 | case 'e':
|
---|
2555 | case 'E':
|
---|
2556 | switch (ic) {
|
---|
2557 | case 'w': /* "dw", "cw" */
|
---|
2558 | vi_word_motion(vi_cmdmode);
|
---|
2559 | break;
|
---|
2560 | case 'W': /* 'dW', 'cW' */
|
---|
2561 | vi_Word_motion(vi_cmdmode);
|
---|
2562 | break;
|
---|
2563 | case 'e': /* 'de', 'ce' */
|
---|
2564 | vi_end_motion();
|
---|
2565 | input_forward();
|
---|
2566 | break;
|
---|
2567 | case 'E': /* 'dE', 'cE' */
|
---|
2568 | vi_End_motion();
|
---|
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 */
|
---|
2579 | if (ic == 'b')
|
---|
2580 | vi_back_motion();
|
---|
2581 | else
|
---|
2582 | vi_Back_motion();
|
---|
2583 | while (sc-- > cursor)
|
---|
2584 | input_delete(1);
|
---|
2585 | break;
|
---|
2586 | case ' ': /* "d ", "c " */
|
---|
2587 | input_delete(1);
|
---|
2588 | break;
|
---|
2589 | case '$': /* "d$", "c$" */
|
---|
2590 | clear_to_eol:
|
---|
2591 | while (cursor < command_len)
|
---|
2592 | input_delete(1);
|
---|
2593 | break;
|
---|
2594 | }
|
---|
2595 | break;
|
---|
2596 | }
|
---|
2597 | case 'p'|VI_CMDMODE_BIT:
|
---|
2598 | input_forward();
|
---|
2599 | /* fallthrough */
|
---|
2600 | case 'P'|VI_CMDMODE_BIT:
|
---|
2601 | put();
|
---|
2602 | break;
|
---|
2603 | case 'r'|VI_CMDMODE_BIT:
|
---|
2604 | //FIXME: unicode case?
|
---|
2605 | ic = lineedit_read_key(read_key_buffer, timeout);
|
---|
2606 | if (errno) /* error */
|
---|
2607 | goto return_error_indicator;
|
---|
2608 | if (ic < ' ' || ic > 255) {
|
---|
2609 | beep();
|
---|
2610 | } else {
|
---|
2611 | command_ps[cursor] = ic;
|
---|
2612 | bb_putchar(ic);
|
---|
2613 | bb_putchar('\b');
|
---|
2614 | }
|
---|
2615 | break;
|
---|
2616 | case '\x1b': /* ESC */
|
---|
2617 | if (state->flags & VI_MODE) {
|
---|
2618 | /* insert mode --> command mode */
|
---|
2619 | vi_cmdmode = 1;
|
---|
2620 | input_backward(1);
|
---|
2621 | }
|
---|
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 | */
|
---|
2626 | ic = lineedit_read_key(read_key_buffer, 50);
|
---|
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 | }
|
---|
2660 | break;
|
---|
2661 | #endif /* FEATURE_COMMAND_EDITING_VI */
|
---|
2662 |
|
---|
2663 | #if MAX_HISTORY > 0
|
---|
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())
|
---|
2671 | break;
|
---|
2672 | rewrite_line:
|
---|
2673 | /* Rewrite the line with the selected history item */
|
---|
2674 | /* change command */
|
---|
2675 | command_len = load_string(state->history[state->cur_history] ?
|
---|
2676 | state->history[state->cur_history] : "");
|
---|
2677 | /* redraw and go to eol (bol, in vi) */
|
---|
2678 | redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
|
---|
2679 | break;
|
---|
2680 | #endif
|
---|
2681 | case KEYCODE_RIGHT:
|
---|
2682 | input_forward();
|
---|
2683 | break;
|
---|
2684 | case KEYCODE_LEFT:
|
---|
2685 | input_backward(1);
|
---|
2686 | break;
|
---|
2687 | case KEYCODE_CTRL_LEFT:
|
---|
2688 | case KEYCODE_ALT_LEFT: /* bash doesn't do it */
|
---|
2689 | ctrl_left();
|
---|
2690 | break;
|
---|
2691 | case KEYCODE_CTRL_RIGHT:
|
---|
2692 | case KEYCODE_ALT_RIGHT: /* bash doesn't do it */
|
---|
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'" */
|
---|
2710 | break;
|
---|
2711 | }
|
---|
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;
|
---|
2719 |
|
---|
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;
|
---|
2723 | break;
|
---|
2724 | }
|
---|
2725 | input_delete(0);
|
---|
2726 | break;
|
---|
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 | */
|
---|
2747 | break;
|
---|
2748 | }
|
---|
2749 | if ((int)command_len >= (maxsize - 2)) {
|
---|
2750 | /* Not enough space for the char and EOL */
|
---|
2751 | break;
|
---|
2752 | }
|
---|
2753 |
|
---|
2754 | command_len++;
|
---|
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 */
|
---|
2764 | int sc = cursor;
|
---|
2765 |
|
---|
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();
|
---|
2773 | /* to prev x pos + 1 */
|
---|
2774 | input_backward(cursor - sc);
|
---|
2775 | }
|
---|
2776 | break;
|
---|
2777 | } /* switch (ic) */
|
---|
2778 |
|
---|
2779 | if (break_out)
|
---|
2780 | break;
|
---|
2781 |
|
---|
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);
|
---|
2800 | }
|
---|
2801 | #endif
|
---|
2802 |
|
---|
2803 | /* End of bug-catching "command_must_not_be_used" trick */
|
---|
2804 | #undef command
|
---|
2805 |
|
---|
2806 | #if ENABLE_UNICODE_SUPPORT
|
---|
2807 | command[0] = '\0';
|
---|
2808 | if (command_len > 0)
|
---|
2809 | command_len = save_string(command, maxsize - 1);
|
---|
2810 | free(command_ps);
|
---|
2811 | #endif
|
---|
2812 |
|
---|
2813 | if (command_len > 0) {
|
---|
2814 | remember_in_history(command);
|
---|
2815 | }
|
---|
2816 |
|
---|
2817 | if (break_out > 0) {
|
---|
2818 | command[command_len++] = '\n';
|
---|
2819 | command[command_len] = '\0';
|
---|
2820 | }
|
---|
2821 |
|
---|
2822 | #if ENABLE_FEATURE_TAB_COMPLETION
|
---|
2823 | free_tab_completion_data();
|
---|
2824 | #endif
|
---|
2825 |
|
---|
2826 | /* restore initial_settings */
|
---|
2827 | tcsetattr_stdin_TCSANOW(&initial_settings);
|
---|
2828 | /* restore SIGWINCH handler */
|
---|
2829 | signal(SIGWINCH, previous_SIGWINCH_handler);
|
---|
2830 | fflush_all();
|
---|
2831 |
|
---|
2832 | len = command_len;
|
---|
2833 | DEINIT_S();
|
---|
2834 |
|
---|
2835 | return len; /* can't return command_len, DEINIT_S() destroys it */
|
---|
2836 | }
|
---|
2837 |
|
---|
2838 | #else /* !FEATURE_EDITING */
|
---|
2839 |
|
---|
2840 | #undef read_line_input
|
---|
2841 | int FAST_FUNC read_line_input(const char* prompt, char* command, int maxsize)
|
---|
2842 | {
|
---|
2843 | fputs(prompt, stdout);
|
---|
2844 | fflush_all();
|
---|
2845 | if (!fgets(command, maxsize, stdin))
|
---|
2846 | return -1;
|
---|
2847 | return strlen(command);
|
---|
2848 | }
|
---|
2849 |
|
---|
2850 | #endif /* !FEATURE_EDITING */
|
---|
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;
|
---|
2880 | buff[l-1] = '\0';
|
---|
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 */
|
---|