Merge branch 'master' of git+ssh://vda@busybox.net/var/lib/git/busybox

[oweals/busybox.git] / shell / Config.in

diff --git a/shell/Config.in b/shell/Config.in
index 253752bc3281505fb6a433ddc3bbd8005cec5630..57969f02cdf00f054573a2508ac64becdcb78264 100644 (file)
--- a/shell/Config.in
+++ b/shell/Config.in
@@ -20,9 +20,9 @@ config FEATURE_SH_IS_HUSH
        select HUSH
        bool "hush"
 
        select HUSH
        bool "hush"
 

-config FEATURE_SH_IS_LASH
-       select LASH
-       bool "lash"
+####config FEATURE_SH_IS_LASH
+####   select LASH
+####   bool "lash"

 
 config FEATURE_SH_IS_MSH
        select MSH
 
 config FEATURE_SH_IS_MSH
        select MSH


@@ -36,17 +36,23 @@ endchoice
 config ASH
        bool "ash"
        default n
 config ASH
        bool "ash"
        default n

-       select TEST

        help
          Tha 'ash' shell adds about 60k in the default configuration and is
          the most complete and most pedantically correct shell included with
        help
          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'
+         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 ASH
 
          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
+       depends on ASH
+       help
+         Enable bash-compatible extensions.
+

 config ASH_JOB_CONTROL
        bool "Job control"
        default y
 config ASH_JOB_CONTROL
        bool "Job control"
        default y


@@ -63,7 +69,7 @@ config ASH_READ_NCHARS
          'read -s' will read without echoing the user's input.
 
 config ASH_READ_TIMEOUT
          'read -s' will read without echoing the user's input.
 
 config ASH_READ_TIMEOUT

-       bool "'read -t S' support."
+       bool "'read -t S' support"

        default n
        depends on ASH
        help
        default n
        depends on ASH
        help


@@ -78,22 +84,6 @@ config ASH_ALIAS
        help
          Enable alias support in the ash shell.
 
        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
 config ASH_GETOPTS
        bool "Builtin getopt to parse positional parameters"
        default n


@@ -104,15 +94,20 @@ config ASH_GETOPTS
 config ASH_BUILTIN_ECHO
        bool "Builtin version of 'echo'"
        default y
 config ASH_BUILTIN_ECHO
        bool "Builtin version of 'echo'"
        default y

-       select ECHO

        depends on ASH
        help
          Enable support for echo, builtin to ash.
 
        depends on ASH
        help
          Enable support for echo, builtin to ash.
 

+config ASH_BUILTIN_PRINTF
+       bool "Builtin version of 'printf'"
+       default y
+       depends on ASH
+       help
+         Enable support for printf, builtin to ash.
+

 config ASH_BUILTIN_TEST
        bool "Builtin version of 'test'"
        default y
 config ASH_BUILTIN_TEST
        bool "Builtin version of 'test'"
        default y

-       select TEST

        depends on ASH
        help
          Enable support for test, builtin to ash.
        depends on ASH
        help
          Enable support for test, builtin to ash.


@@ -141,14 +136,14 @@ config ASH_OPTIMIZE_FOR_SIZE
          Compile ash for reduced size at the price of speed.
 
 config ASH_RANDOM_SUPPORT
          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.
        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
          variable will no longer have special treatment.
 
 config ASH_EXPAND_PRMT


@@ -156,25 +151,30 @@ config ASH_EXPAND_PRMT
        default n
        depends on ASH
        help
        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.
 
 config HUSH
        bool "hush"
        default n
          This option recreates the prompt string from the environment
          variable each time it is displayed.
 
 config HUSH
        bool "hush"
        default n

-       select TRUE
-       select FALSE
-       select TEST

        help
        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,
-         etc.
+         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 will compile and work on no-mmu systems.

 
 

-         It does not handle case/esac, select, function, 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_HELP
+       bool "help builtin"
+       default n
+       depends on HUSH
+       help
+         Enable help builtin in hush. Code size + ~1 kbyte.

 
 config HUSH_INTERACTIVE
        bool "Interactive mode"
 
 config HUSH_INTERACTIVE
        bool "Interactive mode"


@@ -197,39 +197,89 @@ config HUSH_JOB
          prompting for next command (or executing next command in a script),
          but no separate process group is formed.
 
          prompting for next command (or executing next command in a script),
          but no separate process group is formed.
 

+config HUSH_TICK
+       bool "Process substitution"
+       default n
+       depends on HUSH
+       help
+         Enable process substitution `command` and $(command) in hush.

 
 

-config LASH
-       bool "lash"
+config HUSH_IF
+       bool "Support if/then/elif/else/fi"

        default n
        default n

-       select TRUE
-       select FALSE
-       select TEST
+       depends on HUSH

        help
        help

-         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.
+         Enable if/then/elif/else/fi in hush.

 
 

+config HUSH_LOOPS
+       bool "Support for, while and until loops"
+       default n
+       depends on HUSH
+       help
+         Enable for, while and until loops in hush.
+
+config HUSH_CASE
+       bool "Support case ... esac statement"
+       default n
+       depends on HUSH
+       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_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
+       select HUSH
+       help
+         lash is deprecated and will be removed, please migrate to hush.

 
 config MSH
 
 config MSH

-       bool "msh"
+       bool "msh (deprecated: please use hush)"

        default n
        default n

-       select TRUE
-       select FALSE
-       select TEST

        help
        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 also 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.
+
+#        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.
+

 
 comment "Bourne Shell Options"
        depends on MSH || LASH || HUSH || ASH
 
 
 comment "Bourne Shell Options"
        depends on MSH || LASH || HUSH || ASH
 

+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"
        default n
 config FEATURE_SH_EXTRA_QUIET
        bool "Hide message on interactive shell startup"
        default n


@@ -243,11 +293,11 @@ config FEATURE_SH_STANDALONE
        depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS
        help
          This option causes busybox shells to use busybox applets
        depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS
        help
          This option causes busybox shells to use busybox applets

-         in preference to executables in the PATH whenever possible.  For
+         in preference to executables in the PATH whenever possible. For

          example, entering the command 'ifconfig' into the shell would cause
          example, entering the command 'ifconfig' into the shell would cause

-         busybox to use the ifconfig busybox applet.  Specifying the fully
+         busybox to use the ifconfig busybox applet. Specifying the fully

          qualified executable name, such as '/sbin/ifconfig' will still
          qualified executable name, such as '/sbin/ifconfig' will still

-         execute the /sbin/ifconfig executable on the filesystem.  This option
+         execute the /sbin/ifconfig executable on the filesystem. This option

          is generally used when creating a statically linked version of busybox
          for use as a rescue shell, in the event that you screw up your system.
 
          is generally used when creating a statically linked version of busybox
          for use as a rescue shell, in the event that you screw up your system.
 


@@ -261,15 +311,32 @@ config FEATURE_SH_STANDALONE
          started this way).
 # untrue?
 #        Note that this will *also* cause applets to take precedence
          started this way).
 # untrue?
 #        Note that this will *also* cause applets to take precedence

-#        over shell builtins of the same name.  So turning this on will
+#        over shell builtins of the same name. So turning this on will

 #        eliminate any performance gained by turning on the builtin "echo"
 #        and "test" commands in ash.
 # untrue?
 #        Note that when using this option, the shell will attempt to directly
 #        eliminate any performance gained by turning on the builtin "echo"
 #        and "test" commands in ash.
 # untrue?
 #        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
+#        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.
 
 #        that exact location with that exact name, this option will not work at
 #        all.
 

+config FEATURE_SH_NOFORK
+       bool "Run 'nofork' applets directly"
+       default n
+       depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS
+       help
+         This option causes busybox shells [currently only ash]
+         to not execute typical fork/exec/wait sequence, but call <applet>_main
+         directly, if possible. (Sometimes it is not possible: for example,
+         this is not possible in pipes).
+
+         This will be done only for some applets (those which are marked
+         NOFORK in include/applets.h).
+
+         This may significantly speed up some shell scripts.
+
+         This feature is relatively new. Use with care.
+

 config CTTYHACK
        bool "cttyhack"
        default n
 config CTTYHACK
        bool "cttyhack"
        default n