--- trunk/mkinitrd-magellan/busybox/shell/Config.in 2010/04/29 20:38:48 983 +++ trunk/mkinitrd-magellan/busybox/shell/Config.in 2010/05/30 11:32:42 984 @@ -15,6 +15,7 @@ config FEATURE_SH_IS_ASH select ASH bool "ash" + depends on !NOMMU config FEATURE_SH_IS_HUSH select HUSH @@ -24,9 +25,9 @@ #### select LASH #### bool "lash" -config FEATURE_SH_IS_MSH - select MSH - bool "msh" +####config FEATURE_SH_IS_MSH +#### select MSH +#### bool "msh" config FEATURE_SH_IS_NONE bool "none" @@ -36,6 +37,7 @@ config ASH bool "ash" default n + depends on !NOMMU help Tha 'ash' shell adds about 60k in the default configuration and is the most complete and most pedantically correct shell included with @@ -43,9 +45,6 @@ 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 @@ -60,23 +59,6 @@ help Enable job control in the ash shell. -config ASH_READ_NCHARS - bool "'read -n N' and 'read -s' support" - default n - depends on 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 ASH_READ_TIMEOUT - bool "'read -t S' support" - default n - depends on 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 ASH_ALIAS bool "alias support" default y @@ -84,22 +66,6 @@ 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 @@ -152,14 +118,14 @@ 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 @@ -167,7 +133,7 @@ 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. @@ -175,16 +141,22 @@ 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. - - It uses only vfork, so it can be used on uClinux systems. - - It does not handle select, functions, here documents ( << - word ), arithmetic expansion, aliases, brace expansion, tilde - expansion, &> and >& redirection of stdout+stderr, 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 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" @@ -200,7 +172,7 @@ 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 HUSH_JOB @@ -234,7 +206,6 @@ 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" @@ -243,26 +214,73 @@ 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 HUSH_RANDOM_SUPPORT + bool "Pseudorandom generator and $RANDOM variable" + default n + depends on HUSH + help + Enable pseudorandom generator and dynamic variable "$RANDOM". + Each read of "$RANDOM" will generate a new pseudorandom value. + config LASH - bool "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" + 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 + depends on ASH || HUSH 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. + Enable math support in the shell via $((...)) syntax. -comment "Bourne Shell Options" - depends on MSH || LASH || HUSH || ASH +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"