diff options
Diffstat (limited to 'packages/busybox/busybox-kconfigs/busybox-shell.kconfig')
| -rw-r--r-- | packages/busybox/busybox-kconfigs/busybox-shell.kconfig | 163 |
1 files changed, 111 insertions, 52 deletions
diff --git a/packages/busybox/busybox-kconfigs/busybox-shell.kconfig b/packages/busybox/busybox-kconfigs/busybox-shell.kconfig index 84b7124..ba41543 100644 --- a/packages/busybox/busybox-kconfigs/busybox-shell.kconfig +++ b/packages/busybox/busybox-kconfigs/busybox-shell.kconfig @@ -7,38 +7,11 @@ comment "-------------------------------------------------" comment "Shells" comment "-------------------------------------------------" -choice - prompt "Choose your default shell" - help - Choose a shell. The ash shell is the most bash compatible - and full featured one. - -config KEMBTK_BUSYB_FEATURE_SH_IS_ASH - select KEMBTK_BUSYB_ASH - bool "ash" - depends on !KEMBTK_BUSYB_NOMMU - -config KEMBTK_BUSYB_FEATURE_SH_IS_HUSH - select KEMBTK_BUSYB_HUSH - depends on EMBTK_BB_VERSION_1_13_X || EMBTK_BB_VERSION_1_14_X - bool "hush" - -####config FEATURE_SH_IS_LASH -#### select KEMBTK_BUSYB_LASH -#### bool "lash" - -config KEMBTK_BUSYB_FEATURE_SH_IS_MSH - select KEMBTK_BUSYB_MSH - depends on EMBTK_BB_VERSION_1_13_X || EMBTK_BB_VERSION_1_14_X - bool "msh" - -config KEMBTK_BUSYB_FEATURE_SH_IS_NONE - bool "none" -endchoice config KEMBTK_BUSYB_ASH bool "ash" + default y depends on !KEMBTK_BUSYB_NOMMU help Tha 'ash' shell adds about 60k in the default configuration and is @@ -62,21 +35,21 @@ config KEMBTK_BUSYB_ASH_JOB_CONTROL Enable job control in the ash shell. config KEMBTK_BUSYB_ASH_READ_NCHARS - bool "'read -n N' and 'read -s' support" - depends on KEMBTK_BUSYB_ASH - depends on EMBTK_BB_VERSION_1_13_X || EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X - help - 'read -n N' will return a value after N characters have been read. - 'read -s' will read without echoing the user's input. + bool "'read -n N' and 'read -s' support" + depends on KEMBTK_BUSYB_ASH + depends on EMBTK_BB_VERSION_1_13_X || EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X + 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 KEMBTK_BUSYB_ASH_READ_TIMEOUT - bool "'read -t S' support" - depends on KEMBTK_BUSYB_ASH - depends on EMBTK_BB_VERSION_1_13_X || EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X - 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'. + bool "'read -t S' support" + depends on KEMBTK_BUSYB_ASH + depends on EMBTK_BB_VERSION_1_13_X || EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X + 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 KEMBTK_BUSYB_ASH_ALIAS bool "alias support" @@ -104,6 +77,7 @@ config KEMBTK_BUSYB_ASH_MATH_SUPPORT_64 config KEMBTK_BUSYB_ASH_GETOPTS bool "Builtin getopt to parse positional parameters" + default y depends on KEMBTK_BUSYB_ASH help Enable getopts builtin in the ash shell. @@ -131,6 +105,7 @@ config KEMBTK_BUSYB_ASH_BUILTIN_TEST config KEMBTK_BUSYB_ASH_CMDCMD bool "'command' command to override shell builtins" + default y depends on KEMBTK_BUSYB_ASH help Enable support for the ash 'command' builtin, which allows @@ -139,7 +114,6 @@ config KEMBTK_BUSYB_ASH_CMDCMD config KEMBTK_BUSYB_ASH_MAIL bool "Check for new mail on interactive shells" - default y depends on KEMBTK_BUSYB_ASH help Enable "check for new mail" in the ash shell. @@ -153,6 +127,7 @@ config KEMBTK_BUSYB_ASH_OPTIMIZE_FOR_SIZE config KEMBTK_BUSYB_ASH_RANDOM_SUPPORT bool "Pseudorandom generator and $RANDOM variable" + default y depends on KEMBTK_BUSYB_ASH help Enable pseudorandom generator and dynamic variable "$RANDOM". @@ -163,6 +138,7 @@ config KEMBTK_BUSYB_ASH_RANDOM_SUPPORT config KEMBTK_BUSYB_ASH_EXPAND_PRMT bool "Expand prompt string" + default y depends on KEMBTK_BUSYB_ASH help "PS#" may contain volatile content, such as backquote commands. @@ -171,6 +147,7 @@ config KEMBTK_BUSYB_ASH_EXPAND_PRMT config KEMBTK_BUSYB_HUSH bool "hush" + default y help 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, @@ -186,12 +163,13 @@ config KEMBTK_BUSYB_HUSH_BASH_COMPAT bool "bash-compatible extensions" default y depends on KEMBTK_BUSYB_HUSH - depends on EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X + depends on EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X || EMBTK_BB_VERSION_1_17_X help Enable bash-compatible extensions. config KEMBTK_BUSYB_HUSH_HELP bool "help builtin" + default y depends on KEMBTK_BUSYB_HUSH help Enable help builtin in hush. Code size + ~1 kbyte. @@ -208,6 +186,7 @@ config KEMBTK_BUSYB_HUSH_INTERACTIVE config KEMBTK_BUSYB_HUSH_JOB bool "Job control" + default y depends on KEMBTK_BUSYB_HUSH_INTERACTIVE help Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current @@ -218,65 +197,131 @@ config KEMBTK_BUSYB_HUSH_JOB config KEMBTK_BUSYB_HUSH_TICK bool "Process substitution" + default y depends on KEMBTK_BUSYB_HUSH help Enable process substitution `command` and $(command) in hush. config KEMBTK_BUSYB_HUSH_IF bool "Support if/then/elif/else/fi" + default y depends on KEMBTK_BUSYB_HUSH help Enable if/then/elif/else/fi in hush. config KEMBTK_BUSYB_HUSH_LOOPS bool "Support for, while and until loops" + default y depends on KEMBTK_BUSYB_HUSH help Enable for, while and until loops in hush. config KEMBTK_BUSYB_HUSH_CASE bool "Support case ... esac statement" + default y depends on KEMBTK_BUSYB_HUSH help Enable case ... esac statement in hush. +400 bytes. config KEMBTK_BUSYB_HUSH_FUNCTIONS bool "Support funcname() { commands; } syntax" + default y depends on KEMBTK_BUSYB_HUSH - depends on EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X + depends on EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X || EMBTK_BB_VERSION_1_17_X help Enable support for shell functions in hush. +800 bytes. config KEMBTK_BUSYB_HUSH_LOCAL bool "Support local builtin" + default y depends on KEMBTK_BUSYB_HUSH_FUNCTIONS help Enable support for local variables in functions. config KEMBTK_BUSYB_HUSH_EXPORT_N bool "Support export '-n' option" + default y depends on KEMBTK_BUSYB_HUSH - depends on EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X + depends on EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X || EMBTK_BB_VERSION_1_17_X help Enable support for export '-n' option in hush. It is a bash extension. config KEMBTK_BUSYB_HUSH_RANDOM_SUPPORT bool "Pseudorandom generator and $RANDOM variable" + default y depends on KEMBTK_BUSYB_HUSH - depends on EMBTK_BB_VERSION_1_16_X + depends on EMBTK_BB_VERSION_1_16_X || EMBTK_BB_VERSION_1_17_X help Enable pseudorandom generator and dynamic variable "$RANDOM". Each read of "$RANDOM" will generate a new pseudorandom value. + +choice + prompt "Choose which shell is aliased to 'sh' name" + 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 KEMBTK_BUSYB_ASH" here, it breaks "make allnoconfig" +config KEMBTK_BUSYB_FEATURE_SH_IS_ASH + depends on KEMBTK_BUSYB_ASH + bool "ash" + depends on !KEMBTK_BUSYB_NOMMU + +config KEMBTK_BUSYB_FEATURE_SH_IS_HUSH + depends on KEMBTK_BUSYB_HUSH + bool "hush" + +config KEMBTK_BUSYB_FEATURE_SH_IS_MSH + select KEMBTK_BUSYB_MSH + depends on EMBTK_BB_VERSION_1_13_X || EMBTK_BB_VERSION_1_14_X + bool "msh" + +config KEMBTK_BUSYB_FEATURE_SH_IS_NONE + bool "none" + +endchoice + +choice + prompt "Choose which shell is aliased to 'bash' name" + depends on EMBTK_BB_VERSION_1_17_X + 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 KEMBTK_BUSYB_FEATURE_BASH_IS_ASH + depends on KEMBTK_BUSYB_ASH + bool "ash" + depends on !KEMBTK_BUSYB_NOMMU + +config KEMBTK_BUSYB_FEATURE_BASH_IS_HUSH + depends on KEMBTK_BUSYB_HUSH + bool "hush" + +config KEMBTK_BUSYB_FEATURE_BASH_IS_NONE + bool "none" + +endchoice + + config KEMBTK_BUSYB_LASH - bool "lash (deprecated: aliased to hush)" - select KEMBTK_BUSYB_HUSH if (EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X) + bool "lash (deprecated)" + select KEMBTK_BUSYB_HUSH if (EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X || EMBTK_BB_VERSION_1_17_X) help lash is deprecated and will be removed, please migrate to hush. config KEMBTK_BUSYB_MSH bool "msh (deprecated: please use hush)" - select KEMBTK_BUSYB_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. @@ -293,12 +338,13 @@ config KEMBTK_BUSYB_SH_MATH_SUPPORT bool "POSIX math support" default y depends on KEMBTK_BUSYB_ASH || KEMBTK_BUSYB_HUSH - depends on EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X + depends on EMBTK_BB_VERSION_1_14_X || EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X || EMBTK_BB_VERSION_1_17_X help Enable math support in the shell via $((...)) syntax. config KEMBTK_BUSYB_SH_MATH_SUPPORT_64 bool "Extend POSIX math support to 64 bit" + default y depends on KEMBTK_BUSYB_SH_MATH_SUPPORT help Enable 64-bit math support in the shell. This will make the shell @@ -307,6 +353,7 @@ config KEMBTK_BUSYB_SH_MATH_SUPPORT_64 config KEMBTK_BUSYB_FEATURE_SH_EXTRA_QUIET bool "Hide message on interactive shell startup" + default y depends on KEMBTK_BUSYB_MSH || KEMBTK_BUSYB_LASH || KEMBTK_BUSYB_HUSH || KEMBTK_BUSYB_ASH help Remove the busybox introduction when starting a shell. @@ -361,6 +408,7 @@ config KEMBTK_BUSYB_FEATURE_SH_NOFORK config KEMBTK_BUSYB_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 @@ -373,8 +421,19 @@ config KEMBTK_BUSYB_CTTYHACK 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 + |