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_BASH_COMPAT
bool "bash-compatible extensions"
default y
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
Compile ash for reduced size at the price of speed.
config ASH_RANDOM_SUPPORT
- bool "Pseudorandom generator and variable $RANDOM"
+ bool "Pseudorandom generator and $RANDOM variable"
default n
depends on ASH
help
Enable pseudorandom generator and dynamic variable "$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
+ After "unset RANDOM" the generator will switch off and this
variable will no longer have special treatment.
config ASH_EXPAND_PRMT
default n
depends on ASH
help
- "PS#" may be contain volatile content, such as backquote commands.
+ "PS#" may contain volatile content, such as backquote commands.
This option recreates the prompt string from the environment
variable each time it is displayed.
bool "hush"
default n
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,
- case/esac.
+ hush is a small shell (22k). It handles the normal flow control
+ constructs such as if/then/elif/else/fi, for/in/do/done, while loops,
+ case/esac. Redirections, here documents, $((arithmetic))
+ and functions are supported.
- It uses only vfork, so it can be used on uClinux systems.
+ It will compile and work on no-mmu systems.
- It does not handle select, functions, here documents ( <<
- word ), arithmetic expansion, aliases, brace expansion, tilde
- expansion, &> and >& redirection of stdout+stderr, etc.
+ It does not handle select, aliases, brace expansion,
+ tilde expansion, &>file and >&file redirection of stdout+stderr.
+
+config HUSH_BASH_COMPAT
+ bool "bash-compatible extensions"
+ default y
+ depends on HUSH
+ help
+ Enable bash-compatible extensions.
config HUSH_HELP
bool "help builtin"
depends on HUSH
help
Enable for, while and until loops in hush.
- As of 2008-07, break and continue statements are not supported.
config HUSH_CASE
bool "Support case ... esac statement"
help
Enable case ... esac statement in hush. +400 bytes.
+config HUSH_FUNCTIONS
+ bool "Support funcname() { commands; } syntax"
+ default n
+ depends on HUSH
+ help
+ Enable support for shell functions in hush. +800 bytes.
+
+config HUSH_LOCAL
+ bool "Support local builtin"
+ default n
+ depends on HUSH_FUNCTIONS
+ help
+ Enable support for local variables in functions.
+
+config HUSH_EXPORT_N
+ bool "Support export '-n' option"
+ default n
+ depends on HUSH
+ help
+ Enable support for export '-n' option in hush. It is a bash extension.
+
config LASH
bool "lash (deprecated: aliased to hush)"
default n
lash is deprecated and will be removed, please migrate to hush.
config MSH
- bool "msh"
+ bool "msh (deprecated: please use hush)"
default n
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 uses only vfork, so it can be used on uClinux systems.
+ 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.
-comment "Bourne Shell Options"
- depends on MSH || LASH || HUSH || ASH
+# 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
+ depends on ASH || HUSH
+ help
+ Enable math support in the shell via $((...)) syntax.
+
+config SH_MATH_SUPPORT_64
+ bool "Extend POSIX math support to 64 bit"
+ default n
+ depends on SH_MATH_SUPPORT
+ help
+ Enable 64-bit math support in the shell. This will make the shell
+ slightly larger, but will allow computation with very large numbers.
+ This is not in POSIX, so do not rely on this in portable code.
config FEATURE_SH_EXTRA_QUIET
bool "Hide message on interactive shell startup"