diff options
Diffstat (limited to 'busybox-shell.kconfig')
| -rw-r--r-- | busybox-shell.kconfig | 196 |
1 files changed, 107 insertions, 89 deletions
diff --git a/busybox-shell.kconfig b/busybox-shell.kconfig index ba41543..674beed 100644 --- a/busybox-shell.kconfig +++ b/busybox-shell.kconfig @@ -7,8 +7,6 @@ comment "-------------------------------------------------" comment "Shells" comment "-------------------------------------------------" - - config KEMBTK_BUSYB_ASH bool "ash" default y @@ -20,6 +18,23 @@ config KEMBTK_BUSYB_ASH shell (by Herbert Xu), which was created by porting the 'ash' shell (written by Kenneth Almquist) from NetBSD. +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. + +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'. + config KEMBTK_BUSYB_ASH_BASH_COMPAT bool "bash-compatible extensions" default y @@ -34,23 +49,6 @@ config KEMBTK_BUSYB_ASH_JOB_CONTROL help 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. - -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'. - config KEMBTK_BUSYB_ASH_ALIAS bool "alias support" default y @@ -145,28 +143,72 @@ config KEMBTK_BUSYB_ASH_EXPAND_PRMT This option recreates the prompt string from the environment variable each time it is displayed. +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 + 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' + config KEMBTK_BUSYB_HUSH bool "hush" default y help - hush is a small shell (22k). It handles the normal flow control + hush is a small shell (25k). 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. + It does not handle select, aliases, tilde expansion, + &>file and >&file redirection of stdout+stderr. 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 || EMBTK_BB_VERSION_1_17_X + depends on EMBTK_BB_VERSION_1_15_X || EMBTK_BB_VERSION_1_16_X || EMBTK_BB_VERSION_1_17_X || EMBTK_BB_VERSION_1_18_X help Enable bash-compatible extensions. +config KEMBTK_BUSYB_HUSH_BRACE_EXPANSION + bool "Brace expansion" + default y + depends on KEMBTK_BUSYB_HUSH_BASH_COMPAT + depends on EMBTK_BB_VERSION_1_18_X + help + Enable {abc,def} extension. + config KEMBTK_BUSYB_HUSH_HELP bool "help builtin" default y @@ -184,6 +226,14 @@ config KEMBTK_BUSYB_HUSH_INTERACTIVE from stdin just like a shell script from a file. No prompt, no KEMBTK_BUSYB_PS1/PS2 magic shell variables. +config KEMBTK_BUSYB_HUSH_SAVEHISTORY + bool "Save command history to .hush_history" + default y + depends on KEMBTK_BUSYB_HUSH_INTERACTIVE && KEMBTK_BUSYB_FEATURE_EDITING_SAVEHISTORY + depends on EMBTK_BB_VERSION_1_18_X + help + Enable history saving in hush. + config KEMBTK_BUSYB_HUSH_JOB bool "Job control" default y @@ -227,7 +277,7 @@ 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 || EMBTK_BB_VERSION_1_17_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 || EMBTK_BB_VERSION_1_18_X help Enable support for shell functions in hush. +800 bytes. @@ -238,22 +288,37 @@ config KEMBTK_BUSYB_HUSH_LOCAL help Enable support for local variables in functions. +config KEMBTK_BUSYB_HUSH_RANDOM_SUPPORT + bool "Pseudorandom generator and $RANDOM variable" + default y + depends on KEMBTK_BUSYB_HUSH + depends on EMBTK_BB_VERSION_1_16_X || EMBTK_BB_VERSION_1_17_X || EMBTK_BB_VERSION_1_18_X + help + Enable pseudorandom generator and dynamic variable "$RANDOM". + Each read of "$RANDOM" will generate a new pseudorandom value. + config KEMBTK_BUSYB_HUSH_EXPORT_N - bool "Support export '-n' option" + 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 || EMBTK_BB_VERSION_1_17_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 || EMBTK_BB_VERSION_1_18_X help - Enable support for export '-n' option in hush. It is a bash extension. + export -n unexports variables. It is a bash extension. -config KEMBTK_BUSYB_HUSH_RANDOM_SUPPORT - bool "Pseudorandom generator and $RANDOM variable" +config KEMBTK_BUSYB_HUSH_MODE_X + bool "Support 'hush -x' option and 'set -x' command" default y depends on KEMBTK_BUSYB_HUSH - depends on EMBTK_BB_VERSION_1_16_X || EMBTK_BB_VERSION_1_17_X + depends on EMBTK_BB_VERSION_1_18_X help - Enable pseudorandom generator and dynamic variable "$RANDOM". - Each read of "$RANDOM" will generate a new pseudorandom value. + This instructs hush to print commands before execution. + Adds ~300 bytes. + +config KEMBTK_BUSYB_MSH + bool "msh (deprecated: aliased to hush)" + select KEMBTK_BUSYB_HUSH if EMBTK_BB_VERSION_1_18_X + help + msh is deprecated and will be removed, please migrate to hush. choice @@ -264,18 +329,17 @@ choice # 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_ASH depends on !KEMBTK_BUSYB_NOMMU config KEMBTK_BUSYB_FEATURE_SH_IS_HUSH - depends on KEMBTK_BUSYB_HUSH bool "hush" + depends on KEMBTK_BUSYB_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" + bool "msh" + depends on EMBTK_BB_VERSION_1_13_X || EMBTK_BB_VERSION_1_14_X config KEMBTK_BUSYB_FEATURE_SH_IS_NONE bool "none" @@ -284,7 +348,7 @@ endchoice choice prompt "Choose which shell is aliased to 'bash' name" - depends on EMBTK_BB_VERSION_1_17_X + depends on EMBTK_BB_VERSION_1_17_X || EMBTK_BB_VERSION_1_18_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. @@ -313,32 +377,17 @@ config KEMBTK_BUSYB_FEATURE_BASH_IS_NONE endchoice - config KEMBTK_BUSYB_LASH - 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)" - 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. - + 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_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 || EMBTK_BB_VERSION_1_17_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 || EMBTK_BB_VERSION_1_18_X help Enable math support in the shell via $((...)) syntax. @@ -406,34 +455,3 @@ config KEMBTK_BUSYB_FEATURE_SH_NOFORK This feature is relatively new. Use with care. -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 - 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 - - Giving controlling tty to shell running with PID 1: - - $ exec cttyhack sh - - Starting an interactive shell from boot shell script: - - setsid cttyhack sh - |