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+#
+# For a description of the syntax of this configuration file,
+# see scripts/kbuild/config-language.txt.
+#
+
+menu "Shells"
+
+choice
+        prompt "Choose your default shell"
+        default FEATURE_SH_IS_NONE
+        help
+          Choose a shell. The ash shell is the most bash compatible
+          and full featured one.
+
+config FEATURE_SH_IS_ASH
+        select ASH
+        bool "ash"
+
+config FEATURE_SH_IS_HUSH
+        select HUSH
+        bool "hush"
+
+config FEATURE_SH_IS_LASH
+        select LASH
+        bool "lash"
+
+config FEATURE_SH_IS_MSH
+        select MSH
+        bool "msh"
+
+config FEATURE_SH_IS_NONE
+        bool "none"
+
+endchoice
+
+config ASH
+        bool "ash"
+        default n
+        select TEST
+        help
+          Tha 'ash' shell adds about 60k in the default configuration and is
+          the most complete and most pedantically correct shell included with
+          busybox.  This shell is actually a derivative of the Debian 'dash'
+          shell (by Herbert Xu), which was created by porting the 'ash' shell
+          (written by Kenneth Almquist) from NetBSD.
+
+comment "Ash Shell Options"
+        depends on ASH
+
+config ASH_JOB_CONTROL
+        bool "Job control"
+        default y
+        depends on ASH
+        help
+          Enable job control in the ash shell.
+
+config ASH_READ_NCHARS
+        bool "'read -n N' and 'read -s' support"
+        default n
+        depends on ASH
+        help
+          'read -n N' will return a value after N characters have been read.
+          'read -s' will read without echoing the user's input.
+
+config ASH_READ_TIMEOUT
+        bool "'read -t S' support."
+        default n
+        depends on ASH
+        help
+          'read -t S' will return a value after S seconds have passed.
+          This implementation will allow fractional seconds, expressed
+          as a decimal fraction, e.g. 'read -t 2.5 foo'.
+
+config ASH_ALIAS
+        bool "alias support"
+        default y
+        depends on ASH
+        help
+          Enable alias support in the ash shell.
+
+config ASH_MATH_SUPPORT
+        bool "Posix math support"
+        default y
+        depends on ASH
+        help
+          Enable math support in the ash shell.
+
+config ASH_MATH_SUPPORT_64
+        bool "Extend Posix math support to 64 bit"
+        default n
+        depends on ASH_MATH_SUPPORT
+        help
+          Enable 64-bit math support in the ash shell.  This will make
+          the shell slightly larger, but will allow computation with very
+          large numbers.
+
+config ASH_GETOPTS
+        bool "Builtin getopt to parse positional parameters"
+        default n
+        depends on ASH
+        help
+          Enable getopts builtin in the ash shell.
+
+config ASH_BUILTIN_ECHO
+        bool "Builtin version of 'echo'"
+        default y
+        select ECHO
+        depends on ASH
+        help
+          Enable support for echo, built in to ash.
+
+config ASH_BUILTIN_TEST
+        bool "Builtin version of 'test'"
+        default y
+        select TEST
+        depends on ASH
+        help
+          Enable support for test, built in to ash.
+
+config ASH_CMDCMD
+        bool "'command' command to override shell builtins"
+        default n
+        depends on ASH
+        help
+          Enable support for the ash 'command' builtin, which allows
+          you to run the specified command with the specified arguments,
+          even when there is an ash builtin command with the same name.
+
+config ASH_MAIL
+        bool "Check for new mail on interactive shells"
+        default y
+        depends on ASH
+        help
+          Enable "check for new mail" in the ash shell.
+
+config ASH_OPTIMIZE_FOR_SIZE
+        bool "Optimize for size instead of speed"
+        default y
+        depends on ASH
+        help
+          Compile ash for reduced size at the price of speed.
+
+config ASH_RANDOM_SUPPORT
+        bool "Pseudorandom generator and variable $RANDOM"
+        default n
+        depends on ASH
+        help
+          Enable pseudorandom generator and dynamic variable "$RANDOM".
+          Each read of "$RANDOM" will generate a new pseudorandom value.
+          You can reset the generator by using a specified start value.
+          After "unset RANDOM" then generator will switch off and this
+          variable will no longer have special treatment.
+
+config ASH_EXPAND_PRMT
+        bool "Expand prompt string"
+        default n
+        depends on ASH
+        help
+          "PS#" may be contain volatile content, such as backquote commands.
+          This option recreates the prompt string from the environment
+          variable each time it is displayed.
+
+config HUSH
+        bool "hush"
+        default n
+        select TRUE
+        select FALSE
+        select TEST
+        help
+          hush is a very small shell (just 18k) and it has fairly complete
+          Bourne shell grammar.  It even handles all the normal flow control
+          options such as if/then/elif/else/fi, for/in/do/done, while loops,
+          etc.
+
+          It does not handle case/esac, select, function, here documents ( <<
+          word ), arithmetic expansion, aliases, brace expansion, tilde
+          expansion, &> and >& redirection of stdout+stderr, etc.
+
+
+config LASH
+        bool "lash"
+        default n
+        select TRUE
+        select FALSE
+        select TEST
+        help
+          lash is the very smallest shell (adds just 10k) and it is quite
+          usable as a command prompt, but it is not suitable for any but the
+          most trivial scripting (such as an initrd that calls insmod a few
+          times) since it does not understand any Bourne shell grammar.  It
+          does handle pipes, redirects, and job control though.  Adding in
+          command editing makes it a very nice lightweight command prompt.
+
+
+config MSH
+        bool "msh"
+        default n
+        select TRUE
+        select FALSE
+        select TEST
+        help
+          The minix shell (adds just 30k) is quite complete and handles things
+          like for/do/done, case/esac and all the things you expect a Bourne
+          shell to do.  It is not always pedantically correct about Bourne
+          shell grammar (try running the shell testscript "tests/sh.testcases"
+          on it and compare vs bash) but for most things it works quite well.
+          It also uses only vfork, so it can be used on uClinux systems.
+
+comment "Bourne Shell Options"
+        depends on MSH || LASH || HUSH || ASH
+
+config FEATURE_SH_EXTRA_QUIET
+        bool "Hide message on interactive shell startup"
+        default n
+        depends on MSH || LASH || HUSH || ASH
+        help
+          Remove the busybox introduction when starting a shell.
+
+config FEATURE_SH_STANDALONE_SHELL
+        bool "Standalone shell"
+        default n
+        depends on MSH || LASH || HUSH || ASH
+        help
+          This option causes the selected busybox shell to use busybox applets
+          in preference to executables in the PATH whenever possible.  For
+          example, entering the command 'ifconfig' into the shell would cause
+          busybox to use the ifconfig busybox applet.  Specifying the fully
+          qualified executable name, such as '/sbin/ifconfig' will still
+          execute the /sbin/ifconfig executable on the filesystem.  This option
+          is generally used when creating a statically linked version of busybox
+          for use as a rescue shell, in the event that you screw up your system.
+
+          Note that this will *also* cause applets to take precedence
+          over shell builtins of the same name.  So turning this on will
+          eliminate any performance gained by turning on the builtin "echo"
+          and "test" commands in ash.
+
+          Note that when using this option, the shell will attempt to directly
+          run '/bin/busybox'.  If you do not have the busybox binary sitting in
+          that exact location with that exact name, this option will not work at
+          all.
+
+config FEATURE_COMMAND_EDITING
+        bool "Command line editing"
+        default n
+        depends on MSH || LASH || HUSH || ASH
+        help
+          Enable command editing in shell.
+
+config FEATURE_COMMAND_EDITING_VI
+        bool "vi-style line editing commands"
+        default n
+        depends on FEATURE_COMMAND_EDITING
+        help
+          Enable vi-style line editing in the shell.  This mode can be
+          turned on and off with "set -o vi" and "set +o vi".
+
+config FEATURE_COMMAND_HISTORY
+        int "History size"
+        range 0 99999
+        default 15
+        depends on FEATURE_COMMAND_EDITING
+        help
+          Specify command history size in shell.
+
+config FEATURE_COMMAND_SAVEHISTORY
+        bool "History saving"
+        default n
+        depends on ASH && FEATURE_COMMAND_EDITING
+        help
+          Enable history saving in ash shell.
+
+config FEATURE_COMMAND_TAB_COMPLETION
+        bool "Tab completion"
+        default n
+        depends on FEATURE_COMMAND_EDITING
+        help
+          Enable tab completion in shell.
+
+config FEATURE_COMMAND_USERNAME_COMPLETION
+        bool "Username completion"
+        default n
+        depends on FEATURE_COMMAND_TAB_COMPLETION
+        help
+          Enable username completion in shell.
+
+config FEATURE_SH_FANCY_PROMPT
+        bool "Fancy shell prompts"
+        default n
+        depends on FEATURE_COMMAND_EDITING
+        help
+          Setting this option allows for prompts to use things like \w and
+          \$ and also using escape codes.
+
+endmenu