ed9ecf7894
The updated patch adds a config option to explicitely enable 64 bit
arithmetic.
Also it removes the arith prototype from libbb.h as it is not used
outside of ash.
Bastian
this patch has been slightly modified by Erik for cleanliness.
225 lines
6.4 KiB
Plaintext
225 lines
6.4 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see scripts/kbuild/config-language.txt.
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#
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menu "Another Bourne-like Shell"
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choice
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prompt "Choose your default shell"
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default CONFIG_FEATURE_SH_IS_NONE
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help
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Choose a shell. The ash shell is the most bash compatible
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and full featured one.
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config CONFIG_FEATURE_SH_IS_ASH
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select CONFIG_ASH
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bool "ash"
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config CONFIG_FEATURE_SH_IS_HUSH
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select CONFIG_HUSH
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bool "hush"
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config CONFIG_FEATURE_SH_IS_LASH
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select CONFIG_LASH
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bool "lash"
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config CONFIG_FEATURE_SH_IS_MSH
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select CONFIG_MSH
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bool "msh"
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config CONFIG_FEATURE_SH_IS_NONE
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bool "none"
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endchoice
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config CONFIG_ASH
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bool "ash"
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default y
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help
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Tha 'ash' shell adds about 60k in the default configuration and is
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the most complete and most pedantically correct shell included with
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busybox. This shell is actually a derivative of the Debian 'dash'
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shell (by Herbert Xu), which was created by porting the 'ash' shell
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(written by Kenneth Almquist) from NetBSD.
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comment "Ash Shell Options"
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depends on CONFIG_ASH
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config CONFIG_ASH_JOB_CONTROL
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bool " Enable Job control"
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default y
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depends on CONFIG_ASH
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help
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Enable job control in the ash shell.
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config CONFIG_ASH_ALIAS
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bool " Enable alias support"
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default y
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depends on CONFIG_ASH
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help
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Enable alias support in the ash shell.
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config CONFIG_ASH_MATH_SUPPORT
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bool " Enable Posix math support"
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default y
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depends on CONFIG_ASH
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help
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Enable math support in the ash shell.
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config CONFIG_ASH_MATH_SUPPORT_64
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bool " Extend Posix math support to 64 bit"
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default n
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depends on CONFIG_ASH_MATH_SUPPORT
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help
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Enable 64-bit math support in the ash shell. This will make
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the shell slightly larger, but will allow computation with very
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large numbers.
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config CONFIG_ASH_GETOPTS
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bool " Enable getopt builtin to parse positional parameters"
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default n
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depends on CONFIG_ASH
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help
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Enable builtin getopt in the ash shell.
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config CONFIG_ASH_CMDCMD
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bool " Enable cmdcmd to override shell builtins"
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default n
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depends on CONFIG_ASH
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help
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Enable support for the ash 'command' builtin, which allows
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you to run the specified command with the specified arguments,
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even when there is an ash builtin command with the same name.
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config CONFIG_ASH_MAIL
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bool " Check for new mail on interactive shells"
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default y
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depends on CONFIG_ASH
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help
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Enable "check for new mail" in the ash shell.
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config CONFIG_ASH_OPTIMIZE_FOR_SIZE
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bool " Optimize for size instead of speed"
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default y
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depends on CONFIG_ASH
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help
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Compile ash for reduced size at price of speed.
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config CONFIG_ASH_RANDOM_SUPPORT
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bool " Enable pseudorandom generator and variable $RANDOM"
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default n
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depends on CONFIG_ASH
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help
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Enable pseudorandom generator and dynamic variable "$RANDOM".
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Each read of "$RANDOM" will generate a new pseudorandom value.
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You can reset the generator by using a specified start value.
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After "unset RANDOM" then generator will switch off and this
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variable will no longer have special treatment.
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config CONFIG_HUSH
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bool "hush"
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default n
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help
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hush is a very small shell (just 18k) and it has fairly complete
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Bourne shell grammar. It even handles all the normal flow control
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options such as if/then/elif/else/fi, for/in/do/done, while loops,
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etc.
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It does not handle case/esac, select, function, here documents ( <<
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word ), arithmetic expansion, aliases, brace expansion, tilde
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expansion, &> and >& redirection of stdout+stderr, etc.
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config CONFIG_LASH
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bool "lash"
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default n
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help
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lash is the very smallest shell (adds just 10k) and it is quite
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usable as a command prompt, but it is not suitable for any but the
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most trivial scripting (such as an initrd that calls insmod a few
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times) since it does not understand any Bourne shell grammar. It
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does handle pipes, redirects, and job control though. Adding in
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command editing makes it a very nice lightweight command prompt.
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config CONFIG_MSH
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bool "msh"
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default n
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help
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The minix shell (adds just 30k) is quite complete and handles things
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like for/do/done, case/esac and all the things you expect a Bourne
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shell to do. It is not always pedantically correct about Bourne
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shell grammar (try running the shell testscript "tests/sh.testcases"
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on it and compare vs bash) but for most things it works quite well.
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It also uses only vfork, so it can be used on uClinux systems.
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comment "Bourne Shell Options"
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depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
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config CONFIG_FEATURE_SH_EXTRA_QUIET
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bool "Hide message on interactive shell startup"
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default n
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depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
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help
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Remove the busybox introduction when starting a shell.
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config CONFIG_FEATURE_SH_STANDALONE_SHELL
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bool "Standalone shell"
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default n
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depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
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help
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This option causes the selected busybox shell to use busybox applets
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in preference to executables in the PATH whenever possible. For
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example, entering the command 'ifconfig' into the shell would cause
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busybox to use the ifconfig busybox applet. Specifying the fully
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qualified executable name, such as '/sbin/ifconfig' will still
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execute the /sbin/ifconfig executable on the filesystem. This option
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is generally used when creating a staticly linked version of busybox
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for use as a rescue shell, in the event that you screw up your system.
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config CONFIG_FEATURE_COMMAND_EDITING
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bool "command line editing"
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default n
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depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
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help
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Enable command editing in shell.
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config CONFIG_FEATURE_COMMAND_HISTORY
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int "history size"
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default 15
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depends on CONFIG_FEATURE_COMMAND_EDITING
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help
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Specify command history size in shell.
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config CONFIG_FEATURE_COMMAND_SAVEHISTORY
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bool "history saving"
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default n
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depends on CONFIG_ASH && CONFIG_FEATURE_COMMAND_EDITING
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help
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Enable history saving in ash shell.
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config CONFIG_FEATURE_COMMAND_TAB_COMPLETION
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bool "tab completion"
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default n
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depends on CONFIG_FEATURE_COMMAND_EDITING
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help
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Enable tab completion in shell.
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config CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
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bool "username completion"
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default n
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depends on CONFIG_FEATURE_COMMAND_TAB_COMPLETION
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help
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Enable username completion in shell.
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config CONFIG_FEATURE_SH_FANCY_PROMPT
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bool "Fancy shell prompts"
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default n
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depends on CONFIG_FEATURE_COMMAND_EDITING
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help
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Setting this option allows for prompts to use things like \w and
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\$ and also using escape codes.
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endmenu
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