[821] | 1 | #
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| 2 | # For a description of the syntax of this configuration file,
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| 3 | # see scripts/kbuild/config-language.txt.
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| 4 | #
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| 5 |
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| 6 | menu "Shells"
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| 7 |
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| 8 | choice
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| 9 | prompt "Choose your default shell"
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| 10 | default CONFIG_FEATURE_SH_IS_NONE
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| 11 | help
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| 12 | Choose a shell. The ash shell is the most bash compatible
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| 13 | and full featured one.
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| 14 |
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| 15 | config CONFIG_FEATURE_SH_IS_ASH
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| 16 | select CONFIG_ASH
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| 17 | bool "ash"
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| 18 |
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| 19 | config CONFIG_FEATURE_SH_IS_HUSH
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| 20 | select CONFIG_HUSH
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| 21 | bool "hush"
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| 22 |
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| 23 | config CONFIG_FEATURE_SH_IS_LASH
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| 24 | select CONFIG_LASH
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| 25 | bool "lash"
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| 26 |
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| 27 | config CONFIG_FEATURE_SH_IS_MSH
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| 28 | select CONFIG_MSH
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| 29 | bool "msh"
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| 30 |
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| 31 | config CONFIG_FEATURE_SH_IS_NONE
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| 32 | bool "none"
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| 33 |
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| 34 | endchoice
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| 35 |
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| 36 | config CONFIG_ASH
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| 37 | bool "ash"
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| 38 | default n
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| 39 | select CONFIG_TEST
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| 40 | help
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| 41 | Tha 'ash' shell adds about 60k in the default configuration and is
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| 42 | the most complete and most pedantically correct shell included with
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| 43 | busybox. This shell is actually a derivative of the Debian 'dash'
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| 44 | shell (by Herbert Xu), which was created by porting the 'ash' shell
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| 45 | (written by Kenneth Almquist) from NetBSD.
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| 46 |
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| 47 | comment "Ash Shell Options"
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| 48 | depends on CONFIG_ASH
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| 49 |
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| 50 | config CONFIG_ASH_JOB_CONTROL
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| 51 | bool "Job control"
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| 52 | default y
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| 53 | depends on CONFIG_ASH
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| 54 | help
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| 55 | Enable job control in the ash shell.
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| 56 |
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| 57 | config CONFIG_ASH_READ_NCHARS
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| 58 | bool "'read -n N' and 'read -s' support"
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| 59 | default n
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| 60 | depends on CONFIG_ASH
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| 61 | help
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| 62 | 'read -n N' will return a value after N characters have been read.
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| 63 | 'read -s' will read without echoing the user's input.
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| 64 |
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| 65 | config CONFIG_ASH_READ_TIMEOUT
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| 66 | bool "'read -t S' support."
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| 67 | default n
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| 68 | depends on CONFIG_ASH
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| 69 | help
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| 70 | 'read -t S' will return a value after S seconds have passed.
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| 71 | This implementation will allow fractional seconds, expressed
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| 72 | as a decimal fraction, e.g. 'read -t 2.5 foo'.
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| 73 |
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| 74 | config CONFIG_ASH_ALIAS
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| 75 | bool "alias support"
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| 76 | default y
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| 77 | depends on CONFIG_ASH
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| 78 | help
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| 79 | Enable alias support in the ash shell.
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| 80 |
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| 81 | config CONFIG_ASH_MATH_SUPPORT
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| 82 | bool "Posix math support"
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| 83 | default y
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| 84 | depends on CONFIG_ASH
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| 85 | help
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| 86 | Enable math support in the ash shell.
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| 87 |
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| 88 | config CONFIG_ASH_MATH_SUPPORT_64
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| 89 | bool "Extend Posix math support to 64 bit"
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| 90 | default n
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| 91 | depends on CONFIG_ASH_MATH_SUPPORT
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| 92 | help
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| 93 | Enable 64-bit math support in the ash shell. This will make
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| 94 | the shell slightly larger, but will allow computation with very
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| 95 | large numbers.
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| 96 |
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| 97 | config CONFIG_ASH_GETOPTS
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| 98 | bool "Builtin getopt to parse positional parameters"
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| 99 | default n
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| 100 | depends on CONFIG_ASH
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| 101 | help
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| 102 | Enable getopts builtin in the ash shell.
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| 103 |
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| 104 | config CONFIG_ASH_BUILTIN_ECHO
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| 105 | bool "Builtin version of 'echo'"
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| 106 | default y
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| 107 | select CONFIG_ECHO
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| 108 | depends on CONFIG_ASH
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| 109 | help
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| 110 | Enable support for echo, built in to ash.
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| 111 |
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| 112 | config CONFIG_ASH_BUILTIN_TEST
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| 113 | bool "Builtin version of 'test'"
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| 114 | default y
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| 115 | select CONFIG_TEST
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| 116 | depends on CONFIG_ASH
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| 117 | help
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| 118 | Enable support for test, built in to ash.
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| 119 |
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| 120 | config CONFIG_ASH_CMDCMD
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| 121 | bool "'command' command to override shell builtins"
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| 122 | default n
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| 123 | depends on CONFIG_ASH
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| 124 | help
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| 125 | Enable support for the ash 'command' builtin, which allows
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| 126 | you to run the specified command with the specified arguments,
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| 127 | even when there is an ash builtin command with the same name.
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| 128 |
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| 129 | config CONFIG_ASH_MAIL
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| 130 | bool "Check for new mail on interactive shells"
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| 131 | default y
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| 132 | depends on CONFIG_ASH
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| 133 | help
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| 134 | Enable "check for new mail" in the ash shell.
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| 135 |
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| 136 | config CONFIG_ASH_OPTIMIZE_FOR_SIZE
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| 137 | bool "Optimize for size instead of speed"
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| 138 | default y
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| 139 | depends on CONFIG_ASH
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| 140 | help
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| 141 | Compile ash for reduced size at the price of speed.
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| 142 |
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| 143 | config CONFIG_ASH_RANDOM_SUPPORT
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| 144 | bool "Pseudorandom generator and variable $RANDOM"
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| 145 | default n
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| 146 | depends on CONFIG_ASH
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| 147 | help
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| 148 | Enable pseudorandom generator and dynamic variable "$RANDOM".
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| 149 | Each read of "$RANDOM" will generate a new pseudorandom value.
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| 150 | You can reset the generator by using a specified start value.
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| 151 | After "unset RANDOM" then generator will switch off and this
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| 152 | variable will no longer have special treatment.
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| 153 |
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| 154 | config CONFIG_ASH_EXPAND_PRMT
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| 155 | bool "Expand prompt string"
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| 156 | default n
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| 157 | depends on CONFIG_ASH
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| 158 | help
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| 159 | "PS#" may be contain volatile content, such as backquote commands.
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| 160 | This option recreates the prompt string from the environment
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| 161 | variable each time it is displayed.
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| 162 |
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| 163 | config CONFIG_HUSH
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| 164 | bool "hush"
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| 165 | default n
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| 166 | select CONFIG_TRUE
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| 167 | select CONFIG_FALSE
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| 168 | select CONFIG_TEST
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| 169 | help
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| 170 | hush is a very small shell (just 18k) and it has fairly complete
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| 171 | Bourne shell grammar. It even handles all the normal flow control
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| 172 | options such as if/then/elif/else/fi, for/in/do/done, while loops,
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| 173 | etc.
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| 174 |
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| 175 | It does not handle case/esac, select, function, here documents ( <<
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| 176 | word ), arithmetic expansion, aliases, brace expansion, tilde
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| 177 | expansion, &> and >& redirection of stdout+stderr, etc.
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| 178 |
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| 179 |
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| 180 | config CONFIG_LASH
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| 181 | bool "lash"
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| 182 | default n
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| 183 | select CONFIG_TRUE
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| 184 | select CONFIG_FALSE
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| 185 | select CONFIG_TEST
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| 186 | help
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| 187 | lash is the very smallest shell (adds just 10k) and it is quite
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| 188 | usable as a command prompt, but it is not suitable for any but the
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| 189 | most trivial scripting (such as an initrd that calls insmod a few
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| 190 | times) since it does not understand any Bourne shell grammar. It
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| 191 | does handle pipes, redirects, and job control though. Adding in
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| 192 | command editing makes it a very nice lightweight command prompt.
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| 193 |
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| 194 |
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| 195 | config CONFIG_MSH
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| 196 | bool "msh"
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| 197 | default n
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| 198 | select CONFIG_TRUE
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| 199 | select CONFIG_FALSE
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| 200 | select CONFIG_TEST
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| 201 | help
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| 202 | The minix shell (adds just 30k) is quite complete and handles things
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| 203 | like for/do/done, case/esac and all the things you expect a Bourne
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| 204 | shell to do. It is not always pedantically correct about Bourne
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| 205 | shell grammar (try running the shell testscript "tests/sh.testcases"
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| 206 | on it and compare vs bash) but for most things it works quite well.
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| 207 | It also uses only vfork, so it can be used on uClinux systems.
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| 208 |
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| 209 | comment "Bourne Shell Options"
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| 210 | depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
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| 211 |
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| 212 | config CONFIG_FEATURE_SH_EXTRA_QUIET
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| 213 | bool "Hide message on interactive shell startup"
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| 214 | default n
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| 215 | depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
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| 216 | help
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| 217 | Remove the busybox introduction when starting a shell.
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| 218 |
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| 219 | config CONFIG_FEATURE_SH_STANDALONE_SHELL
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| 220 | bool "Standalone shell"
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| 221 | default n
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| 222 | depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
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| 223 | help
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| 224 | This option causes the selected busybox shell to use busybox applets
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| 225 | in preference to executables in the PATH whenever possible. For
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| 226 | example, entering the command 'ifconfig' into the shell would cause
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| 227 | busybox to use the ifconfig busybox applet. Specifying the fully
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| 228 | qualified executable name, such as '/sbin/ifconfig' will still
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| 229 | execute the /sbin/ifconfig executable on the filesystem. This option
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| 230 | is generally used when creating a statically linked version of busybox
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| 231 | for use as a rescue shell, in the event that you screw up your system.
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| 232 |
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| 233 | Note that this will *also* cause applets to take precedence
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| 234 | over shell builtins of the same name. So turning this on will
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| 235 | eliminate any performance gained by turning on the builtin "echo"
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| 236 | and "test" commands in ash.
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| 237 |
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| 238 | Note that when using this option, the shell will attempt to directly
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| 239 | run '/bin/busybox'. If you do not have the busybox binary sitting in
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| 240 | that exact location with that exact name, this option will not work at
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| 241 | all.
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| 242 |
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| 243 | config CONFIG_FEATURE_COMMAND_EDITING
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| 244 | bool "Command line editing"
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| 245 | default n
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| 246 | depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
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| 247 | help
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| 248 | Enable command editing in shell.
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| 249 |
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| 250 | config CONFIG_FEATURE_COMMAND_EDITING_VI
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| 251 | bool "vi-style line editing commands"
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| 252 | default n
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| 253 | depends on CONFIG_FEATURE_COMMAND_EDITING
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| 254 | help
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| 255 | Enable vi-style line editing in the shell. This mode can be
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| 256 | turned on and off with "set -o vi" and "set +o vi".
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| 257 |
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| 258 | config CONFIG_FEATURE_COMMAND_HISTORY
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| 259 | int "History size"
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| 260 | default 15
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| 261 | depends on CONFIG_FEATURE_COMMAND_EDITING
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| 262 | help
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| 263 | Specify command history size in shell.
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| 264 |
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| 265 | config CONFIG_FEATURE_COMMAND_SAVEHISTORY
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| 266 | bool "History saving"
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| 267 | default n
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| 268 | depends on CONFIG_ASH && CONFIG_FEATURE_COMMAND_EDITING
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| 269 | help
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| 270 | Enable history saving in ash shell.
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| 271 |
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| 272 | config CONFIG_FEATURE_COMMAND_TAB_COMPLETION
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| 273 | bool "Tab completion"
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| 274 | default n
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| 275 | depends on CONFIG_FEATURE_COMMAND_EDITING
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| 276 | help
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| 277 | Enable tab completion in shell.
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| 278 |
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| 279 | config CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
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| 280 | bool "Username completion"
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| 281 | default n
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| 282 | depends on CONFIG_FEATURE_COMMAND_TAB_COMPLETION
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| 283 | help
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| 284 | Enable username completion in shell.
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| 285 |
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| 286 | config CONFIG_FEATURE_SH_FANCY_PROMPT
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| 287 | bool "Fancy shell prompts"
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| 288 | default n
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| 289 | depends on CONFIG_FEATURE_COMMAND_EDITING
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| 290 | help
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| 291 | Setting this option allows for prompts to use things like \w and
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| 292 | \$ and also using escape codes.
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| 293 |
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| 294 | endmenu
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