menu "Shells"
-choice
- prompt "Choose your default shell"
- default BUSYBOX_CONFIG_FEATURE_SH_IS_ASH
- help
- Choose a shell. The ash shell is the most bash compatible
- and full featured one.
-
-config BUSYBOX_CONFIG_FEATURE_SH_IS_ASH
- select BUSYBOX_CONFIG_ASH
- bool "ash"
-
-config BUSYBOX_CONFIG_FEATURE_SH_IS_HUSH
- select BUSYBOX_CONFIG_HUSH
- bool "hush"
-
-####config FEATURE_SH_IS_LASH
-#### select LASH
-#### bool "lash"
-
-config BUSYBOX_CONFIG_FEATURE_SH_IS_MSH
- select BUSYBOX_CONFIG_MSH
- bool "msh"
-
-config BUSYBOX_CONFIG_FEATURE_SH_IS_NONE
- bool "none"
-endchoice
config BUSYBOX_CONFIG_ASH
bool "ash"
default y
+ depends on !BUSYBOX_CONFIG_NOMMU
help
Tha 'ash' shell adds about 60k in the default configuration and is
the most complete and most pedantically correct shell included with
shell (by Herbert Xu), which was created by porting the 'ash' shell
(written by Kenneth Almquist) from NetBSD.
-comment "Ash Shell Options"
- depends on BUSYBOX_CONFIG_ASH
-
config BUSYBOX_CONFIG_ASH_BASH_COMPAT
bool "bash-compatible extensions"
default y
help
Enable job control in the ash shell.
-config BUSYBOX_CONFIG_ASH_READ_NCHARS
- bool "'read -n N' and 'read -s' support"
- default n
- depends on BUSYBOX_CONFIG_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 BUSYBOX_CONFIG_ASH_READ_TIMEOUT
- bool "'read -t S' support"
- default y
- depends on BUSYBOX_CONFIG_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 BUSYBOX_CONFIG_ASH_ALIAS
bool "alias support"
default y
It does not handle select, aliases, brace expansion,
tilde expansion, &>file and >&file redirection of stdout+stderr.
+config BUSYBOX_CONFIG_HUSH_BASH_COMPAT
+ bool "bash-compatible extensions"
+ default y
+ depends on BUSYBOX_CONFIG_HUSH
+ help
+ Enable bash-compatible extensions.
+
config BUSYBOX_CONFIG_HUSH_HELP
bool "help builtin"
- default n
+ default y
depends on BUSYBOX_CONFIG_HUSH
help
Enable help builtin in hush. Code size + ~1 kbyte.
config BUSYBOX_CONFIG_HUSH_INTERACTIVE
bool "Interactive mode"
- default n
+ default y
depends on BUSYBOX_CONFIG_HUSH
help
Enable interactive mode (prompt and command editing).
Without this, hush simply reads and executes commands
- from stdin just like a shell script from the file.
+ from stdin just like a shell script from a file.
No prompt, no PS1/PS2 magic shell variables.
config BUSYBOX_CONFIG_HUSH_JOB
bool "Job control"
- default n
+ default y
depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE
help
Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current
config BUSYBOX_CONFIG_HUSH_TICK
bool "Process substitution"
- default n
+ default y
depends on BUSYBOX_CONFIG_HUSH
help
Enable process substitution `command` and $(command) in hush.
config BUSYBOX_CONFIG_HUSH_IF
bool "Support if/then/elif/else/fi"
- default n
+ default y
depends on BUSYBOX_CONFIG_HUSH
help
Enable if/then/elif/else/fi in hush.
config BUSYBOX_CONFIG_HUSH_LOOPS
bool "Support for, while and until loops"
- default n
+ default y
depends on BUSYBOX_CONFIG_HUSH
help
Enable for, while and until loops in hush.
config BUSYBOX_CONFIG_HUSH_CASE
bool "Support case ... esac statement"
- default n
+ default y
depends on BUSYBOX_CONFIG_HUSH
help
Enable case ... esac statement in hush. +400 bytes.
config BUSYBOX_CONFIG_HUSH_FUNCTIONS
bool "Support funcname() { commands; } syntax"
- default n
+ default y
depends on BUSYBOX_CONFIG_HUSH
help
Enable support for shell functions in hush. +800 bytes.
+config BUSYBOX_CONFIG_HUSH_LOCAL
+ bool "Support local builtin"
+ default y
+ depends on BUSYBOX_CONFIG_HUSH_FUNCTIONS
+ help
+ Enable support for local variables in functions.
+
+config BUSYBOX_CONFIG_HUSH_EXPORT_N
+ bool "Support export '-n' option"
+ default y
+ depends on BUSYBOX_CONFIG_HUSH
+ help
+ Enable support for export '-n' option in hush. It is a bash extension.
+
+config BUSYBOX_CONFIG_HUSH_RANDOM_SUPPORT
+ bool "Pseudorandom generator and $RANDOM variable"
+ default n
+ depends on BUSYBOX_CONFIG_HUSH
+ help
+ Enable pseudorandom generator and dynamic variable "$RANDOM".
+ Each read of "$RANDOM" will generate a new pseudorandom value.
+
+
+choice
+ prompt "Choose which shell is aliased to 'sh' name"
+ default BUSYBOX_CONFIG_FEATURE_SH_IS_ASH
+ help
+ Choose which shell you want to be executed by 'sh' alias.
+ The ash shell is the most bash compatible and full featured one.
+
+# note: cannot use "select ASH" here, it breaks "make allnoconfig"
+config BUSYBOX_CONFIG_FEATURE_SH_IS_ASH
+ depends on BUSYBOX_CONFIG_ASH
+ bool "ash"
+ depends on !BUSYBOX_CONFIG_NOMMU
+
+config BUSYBOX_CONFIG_FEATURE_SH_IS_HUSH
+ depends on BUSYBOX_CONFIG_HUSH
+ bool "hush"
+
+config BUSYBOX_CONFIG_FEATURE_SH_IS_NONE
+ bool "none"
+
+endchoice
+
+choice
+ prompt "Choose which shell is aliased to 'bash' name"
+ default BUSYBOX_CONFIG_FEATURE_BASH_IS_NONE
+ help
+ Choose which shell you want to be executed by 'bash' alias.
+ The ash shell is the most bash compatible and full featured one.
+
+ Note that selecting this option does not switch on any bash
+ compatibility code. It merely makes it possible to install
+ /bin/bash (sym)link and run scripts which start with
+ #!/bin/bash line.
+
+ Many systems use it in scripts which use bash-specific features,
+ even simple ones like $RANDOM. Without this option, busybox
+ can't be used for running them because it won't recongnize
+ "bash" as a supported applet name.
+
+config BUSYBOX_CONFIG_FEATURE_BASH_IS_ASH
+ depends on BUSYBOX_CONFIG_ASH
+ bool "ash"
+ depends on !BUSYBOX_CONFIG_NOMMU
+
+config BUSYBOX_CONFIG_FEATURE_BASH_IS_HUSH
+ depends on BUSYBOX_CONFIG_HUSH
+ bool "hush"
+
+config BUSYBOX_CONFIG_FEATURE_BASH_IS_NONE
+ bool "none"
+
+endchoice
+
+
config BUSYBOX_CONFIG_LASH
bool "lash (deprecated: aliased to hush)"
default n
config BUSYBOX_CONFIG_MSH
bool "msh (deprecated: please use hush)"
default n
+ select BUSYBOX_CONFIG_HUSH
help
msh is deprecated and will be removed, please migrate to hush.
If there is a feature msh has but hush does not, please let us know.
# It uses only vfork, so it can be used on uClinux systems.
-comment "Bourne Shell Options"
- depends on BUSYBOX_CONFIG_MSH || BUSYBOX_CONFIG_LASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH
-
config BUSYBOX_CONFIG_SH_MATH_SUPPORT
bool "POSIX math support"
default y
config BUSYBOX_CONFIG_FEATURE_SH_EXTRA_QUIET
bool "Hide message on interactive shell startup"
default n
- depends on BUSYBOX_CONFIG_MSH || BUSYBOX_CONFIG_LASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH
+ depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH
help
Remove the busybox introduction when starting a shell.
config BUSYBOX_CONFIG_FEATURE_SH_STANDALONE
bool "Standalone shell"
default n
- depends on (BUSYBOX_CONFIG_MSH || BUSYBOX_CONFIG_LASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
+ depends on (BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
help
This option causes busybox shells to use busybox applets
in preference to executables in the PATH whenever possible. For
config BUSYBOX_CONFIG_FEATURE_SH_NOFORK
bool "Run 'nofork' applets directly"
default n
- depends on (BUSYBOX_CONFIG_MSH || BUSYBOX_CONFIG_LASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
+ depends on (BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
help
This option causes busybox shells [currently only ash]
to not execute typical fork/exec/wait sequence, but call <applet>_main
It analyzes stdin with various ioctls, trying to determine whether
it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line).
If it detects one, it closes stdin/out/err and reopens that device.
- Then it executes given program. Usage example for /etc/inittab
- (for busybox init):
+ Then it executes given program. Opening the device will make
+ that device a controlling tty. This may require cttyhack
+ to be a session leader.
+
+ Example for /etc/inittab (for busybox init):
::respawn:/bin/cttyhack /bin/sh
+ Giving controlling tty to shell running with PID 1:
+
+ $ exec cttyhack sh
+
+ Starting an interactive shell from boot shell script:
+
+ setsid cttyhack sh
+
endmenu
projects / openwrt.git / blobdiff