default CONFIG_FEATURE_SH_IS_NONE
help
Choose a shell. The ash shell is the most bash compatible
- and full featured.
+ and full featured one.
config CONFIG_FEATURE_SH_IS_ASH
+ select CONFIG_ASH
bool "ash"
config CONFIG_FEATURE_SH_IS_HUSH
+ select CONFIG_HUSH
bool "hush"
config CONFIG_FEATURE_SH_IS_LASH
+ select CONFIG_LASH
bool "lash"
config CONFIG_FEATURE_SH_IS_MSH
+ select CONFIG_MSH
bool "msh"
config CONFIG_FEATURE_SH_IS_NONE
endchoice
-if CONFIG_FEATURE_SH_IS_ASH
- config CONFIG_ASH
- default y
-
- comment "ash (forced enabled as default shell)"
-endif
-
-if !CONFIG_FEATURE_SH_IS_ASH
config CONFIG_ASH
bool "ash"
default y
help
- Make sh a link to ash.
-endif
+ 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 CONFIG_ASH
help
Enable math support in the ash shell.
+config CONFIG_ASH_MATH_SUPPORT_64
+ bool " Extend Posix math support to 64 bit"
+ default n
+ depends on CONFIG_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 CONFIG_ASH_GETOPTS
- bool " Enable getopt builtin to parse positional parameters"
+ bool " Enable getopts builtin to parse positional parameters"
default n
depends on CONFIG_ASH
help
- Enable builtin getopt in the ash shell.
+ Enable getopts builtin in the ash shell.
config CONFIG_ASH_CMDCMD
bool " Enable cmdcmd to override shell builtins"
help
Compile ash for reduced size at price of speed.
-if CONFIG_FEATURE_SH_IS_HUSH
- config CONFIG_HUSH
- default y
+config CONFIG_ASH_RANDOM_SUPPORT
+ bool " Enable pseudorandom generator and variable $RANDOM"
+ default n
+ depends on CONFIG_ASH
+ help
+ Enable pseudorandom generator and dynamic variable "$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.
- comment "hush (forced enabled as default shell)"
-endif
-
-if !CONFIG_FEATURE_SH_IS_HUSH
config CONFIG_HUSH
bool "hush"
default n
help
- Make sh a link to hush.
-endif
+ 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.
-if CONFIG_FEATURE_SH_IS_LASH
- config CONFIG_LASH
- default y
+ It does not handle case/esac, select, function, here documents ( <<
+ word ), arithmetic expansion, aliases, brace expansion, tilde
+ expansion, &> and >& redirection of stdout+stderr, etc.
- comment "lash (forced enabled as default shell)"
-endif
-if !CONFIG_FEATURE_SH_IS_LASH
config CONFIG_LASH
bool "lash"
default n
help
- Make sh a link to lash.
-endif
-
-if CONFIG_FEATURE_SH_IS_MSH
- config CONFIG_MSH
- default y
+ 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.
- comment "msh (forced enabled as default shell)"
-endif
-if !CONFIG_FEATURE_SH_IS_MSH
config CONFIG_MSH
bool "msh"
default n
help
- Make sh a link to msh.
-endif
-
+ 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 CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
-config CONFIG_FEATURE_COMMAND_EDITING
- bool "command line editing"
+config CONFIG_FEATURE_SH_EXTRA_QUIET
+ bool "Hide message on interactive shell startup"
default n
depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
help
- Enable command editing in shell.
-
-config CONFIG_FEATURE_COMMAND_SAVEHISTORY
- bool " history saving"
- default n
- depends on CONFIG_ASH
- help
- Enable history saving in ash shell.
+ Remove the busybox introduction when starting a shell.
-config CONFIG_FEATURE_COMMAND_TAB_COMPLETION
- bool "tab completion"
+config CONFIG_FEATURE_SH_STANDALONE_SHELL
+ bool "Standalone shell"
default n
depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
help
- Enable tab completion in shell.
+ 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 staticly linked version of busybox
+ for use as a rescue shell, in the event that you screw up your system.
-config CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
- bool "username completion"
+ 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 CONFIG_FEATURE_COMMAND_EDITING
+ bool "command line editing"
default n
depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
help
- Enable username completion in shell.
+ Enable command editing in shell.
config CONFIG_FEATURE_COMMAND_HISTORY
int "history size"
default 15
- depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
+ depends on CONFIG_FEATURE_COMMAND_EDITING
help
Specify command history size in shell.
-config CONFIG_FEATURE_SH_STANDALONE_SHELL
- bool "Standalone shell"
+config CONFIG_FEATURE_COMMAND_SAVEHISTORY
+ bool "history saving"
default n
- depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
+ depends on CONFIG_ASH && CONFIG_FEATURE_COMMAND_EDITING
help
- Have all the busybox commands built into the shell, creating
- a standalone shell.
+ Enable history saving in ash shell.
-config CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN
- bool "Standalone shell -- applets always win"
+config CONFIG_FEATURE_COMMAND_TAB_COMPLETION
+ bool "tab completion"
default n
- depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
+ depends on CONFIG_FEATURE_COMMAND_EDITING
help
- Use a command builtin to the shell over one with the same name,
- that may be on the system.
+ Enable tab completion in shell.
+
+config CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION
+ bool "username completion"
+ default n
+ depends on CONFIG_FEATURE_COMMAND_TAB_COMPLETION
+ help
+ Enable username completion in shell.
config CONFIG_FEATURE_SH_FANCY_PROMPT
bool "Fancy shell prompts"
default n
- depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
+ depends on CONFIG_FEATURE_COMMAND_EDITING
help
Setting this option allows for prompts to use things like \w and
\$ and also using escape codes.
-config CONFIG_FEATURE_SH_EXTRA_QUIET
- bool "Hide message on interactive shell startup"
- default n
- depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH
- help
- Remove the busybox introduction when starting a shell.
-
endmenu
-
projects / oweals / busybox.git / blobdiff