endchoice
-config LASH
- bool "lash (deprecated: aliased to hush)"
- default n
- select HUSH
- help
- lash is deprecated and will be removed, please migrate to hush.
-
-config MSH
- bool "msh (deprecated: please use hush)"
- default n
- select 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.
-
-# 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 uses only vfork, so it can be used on uClinux systems.
-
-
config SH_MATH_SUPPORT
bool "POSIX math support"
default y
This feature is relatively new. Use with care.
-config CTTYHACK
- bool "cttyhack"
- default y
- help
- One common problem reported on the mailing list is "can't access tty;
- job control turned off" error message which typically appears when
- one tries to use shell with stdin/stdout opened to /dev/console.
- This device is special - it cannot be a controlling tty.
-
- Proper solution is to use correct device instead of /dev/console.
-
- cttyhack provides "quick and dirty" solution to this problem.
- 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. 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
-
- Starting an interactive shell from boot shell script:
-
- setsid cttyhack sh
-
- Giving controlling tty to shell running with PID 1:
-
- # exec cttyhack sh
-
- Without cttyhack, you need to know exact tty name,
- and do something like this:
-
- # exec setsid sh -c 'exec sh </dev/tty1 >/dev/tty1 2>&1'
-
endmenu