X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/f52d66ff00b24111f87c274d3d7085ef2e1d27b1..2427a1a5f9baffc8a4faf578dbdb5b618e23ed53:/package/busybox/config/shell/Config.in diff --git a/package/busybox/config/shell/Config.in b/package/busybox/config/shell/Config.in index 373c7461a..d652dd307 100644 --- a/package/busybox/config/shell/Config.in +++ b/package/busybox/config/shell/Config.in @@ -5,47 +5,25 @@ menu "Shells" -choice - prompt "Choose your default shell" - default BUSYBOX_CONFIG_FEATURE_SH_IS_ASH - help - Choose a shell. The ash shell is the most bash compatible - and full featured one. - -config BUSYBOX_CONFIG_FEATURE_SH_IS_ASH - select BUSYBOX_CONFIG_ASH - bool "ash" - -config BUSYBOX_CONFIG_FEATURE_SH_IS_HUSH - select BUSYBOX_CONFIG_HUSH - bool "hush" - -config BUSYBOX_CONFIG_FEATURE_SH_IS_LASH - select BUSYBOX_CONFIG_LASH - bool "lash" - -config BUSYBOX_CONFIG_FEATURE_SH_IS_MSH - select BUSYBOX_CONFIG_MSH - bool "msh" -config BUSYBOX_CONFIG_FEATURE_SH_IS_NONE - bool "none" - -endchoice config BUSYBOX_CONFIG_ASH bool "ash" default y - select BUSYBOX_CONFIG_TEST + depends on !BUSYBOX_CONFIG_NOMMU 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" +config BUSYBOX_CONFIG_ASH_BASH_COMPAT + bool "bash-compatible extensions" + default y depends on BUSYBOX_CONFIG_ASH + help + Enable bash-compatible extensions. config BUSYBOX_CONFIG_ASH_JOB_CONTROL bool "Job control" @@ -54,23 +32,6 @@ config BUSYBOX_CONFIG_ASH_JOB_CONTROL help Enable job control in the ash shell. -config BUSYBOX_CONFIG_ASH_READ_NCHARS - bool "'read -n N' and 'read -s' support" - default n - depends on BUSYBOX_CONFIG_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 BUSYBOX_CONFIG_ASH_READ_TIMEOUT - bool "'read -t S' support." - default y - depends on BUSYBOX_CONFIG_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 BUSYBOX_CONFIG_ASH_ALIAS bool "alias support" default y @@ -78,22 +39,6 @@ config BUSYBOX_CONFIG_ASH_ALIAS help Enable alias support in the ash shell. -config BUSYBOX_CONFIG_ASH_MATH_SUPPORT - bool "Posix math support" - default y - depends on BUSYBOX_CONFIG_ASH - help - Enable math support in the ash shell. - -config BUSYBOX_CONFIG_ASH_MATH_SUPPORT_64 - bool "Extend Posix math support to 64 bit" - default n - depends on BUSYBOX_CONFIG_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 BUSYBOX_CONFIG_ASH_GETOPTS bool "Builtin getopt to parse positional parameters" default y @@ -104,18 +49,23 @@ config BUSYBOX_CONFIG_ASH_GETOPTS config BUSYBOX_CONFIG_ASH_BUILTIN_ECHO bool "Builtin version of 'echo'" default y - select BUSYBOX_CONFIG_ECHO depends on BUSYBOX_CONFIG_ASH help - Enable support for echo, built in to ash. + Enable support for echo, builtin to ash. + +config BUSYBOX_CONFIG_ASH_BUILTIN_PRINTF + bool "Builtin version of 'printf'" + default y + depends on BUSYBOX_CONFIG_ASH + help + Enable support for printf, builtin to ash. config BUSYBOX_CONFIG_ASH_BUILTIN_TEST bool "Builtin version of 'test'" default y - select BUSYBOX_CONFIG_TEST depends on BUSYBOX_CONFIG_ASH help - Enable support for test, built in to ash. + Enable support for test, builtin to ash. config BUSYBOX_CONFIG_ASH_CMDCMD bool "'command' command to override shell builtins" @@ -135,160 +85,317 @@ config BUSYBOX_CONFIG_ASH_MAIL config BUSYBOX_CONFIG_ASH_OPTIMIZE_FOR_SIZE bool "Optimize for size instead of speed" - default y + default n depends on BUSYBOX_CONFIG_ASH help Compile ash for reduced size at the price of speed. config BUSYBOX_CONFIG_ASH_RANDOM_SUPPORT - bool "Pseudorandom generator and variable $RANDOM" + bool "Pseudorandom generator and $RANDOM variable" default n depends on BUSYBOX_CONFIG_ASH help Enable pseudorandom generator and dynamic variable "$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 BUSYBOX_CONFIG_ASH_EXPAND_PRMT bool "Expand prompt string" - default n + default y depends on BUSYBOX_CONFIG_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 BUSYBOX_CONFIG_HUSH bool "hush" default n - select BUSYBOX_CONFIG_TRUE - select BUSYBOX_CONFIG_FALSE - select BUSYBOX_CONFIG_TEST 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 does not handle case/esac, select, function, here documents ( << - word ), arithmetic expansion, aliases, brace expansion, tilde - expansion, &> and >& redirection of stdout+stderr, etc. + 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 BUSYBOX_CONFIG_LASH - bool "lash" +config BUSYBOX_CONFIG_HUSH_BASH_COMPAT + bool "bash-compatible extensions" + default y + depends on BUSYBOX_CONFIG_HUSH + help + Enable bash-compatible extensions. + +config BUSYBOX_CONFIG_HUSH_HELP + bool "help builtin" + default y + depends on BUSYBOX_CONFIG_HUSH + help + Enable help builtin in hush. Code size + ~1 kbyte. + +config BUSYBOX_CONFIG_HUSH_INTERACTIVE + bool "Interactive mode" + default y + depends on BUSYBOX_CONFIG_HUSH + help + Enable interactive mode (prompt and command editing). + Without this, hush simply reads and executes commands + from stdin just like a shell script from a file. + No prompt, no PS1/PS2 magic shell variables. + +config BUSYBOX_CONFIG_HUSH_JOB + bool "Job control" + default y + depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE + help + Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current + command (not entire shell), fg/bg builtins work. Without this option, + "cmd &" still works by simply spawning a process and immediately + prompting for next command (or executing next command in a script), + but no separate process group is formed. + +config BUSYBOX_CONFIG_HUSH_TICK + bool "Process substitution" + default y + depends on BUSYBOX_CONFIG_HUSH + help + Enable process substitution `command` and $(command) in hush. + +config BUSYBOX_CONFIG_HUSH_IF + bool "Support if/then/elif/else/fi" + default y + depends on BUSYBOX_CONFIG_HUSH + help + Enable if/then/elif/else/fi in hush. + +config BUSYBOX_CONFIG_HUSH_LOOPS + bool "Support for, while and until loops" + default y + depends on BUSYBOX_CONFIG_HUSH + help + Enable for, while and until loops in hush. + +config BUSYBOX_CONFIG_HUSH_CASE + bool "Support case ... esac statement" + default y + depends on BUSYBOX_CONFIG_HUSH + help + Enable case ... esac statement in hush. +400 bytes. + +config BUSYBOX_CONFIG_HUSH_FUNCTIONS + bool "Support funcname() { commands; } syntax" + default y + depends on BUSYBOX_CONFIG_HUSH + help + Enable support for shell functions in hush. +800 bytes. + +config BUSYBOX_CONFIG_HUSH_LOCAL + bool "Support local builtin" + default y + depends on BUSYBOX_CONFIG_HUSH_FUNCTIONS + help + Enable support for local variables in functions. + +config BUSYBOX_CONFIG_HUSH_EXPORT_N + bool "Support export '-n' option" + default y + depends on BUSYBOX_CONFIG_HUSH + help + Enable support for export '-n' option in hush. It is a bash extension. + +config BUSYBOX_CONFIG_HUSH_RANDOM_SUPPORT + bool "Pseudorandom generator and $RANDOM variable" default n - select BUSYBOX_CONFIG_TRUE - select BUSYBOX_CONFIG_FALSE - select BUSYBOX_CONFIG_TEST + depends on BUSYBOX_CONFIG_HUSH + help + Enable pseudorandom generator and dynamic variable "$RANDOM". + Each read of "$RANDOM" will generate a new pseudorandom value. + + +choice + prompt "Choose which shell is aliased to 'sh' name" + default BUSYBOX_CONFIG_FEATURE_SH_IS_ASH 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. + 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 ASH" here, it breaks "make allnoconfig" +config BUSYBOX_CONFIG_FEATURE_SH_IS_ASH + depends on BUSYBOX_CONFIG_ASH + bool "ash" + depends on !BUSYBOX_CONFIG_NOMMU + +config BUSYBOX_CONFIG_FEATURE_SH_IS_HUSH + depends on BUSYBOX_CONFIG_HUSH + bool "hush" + +config BUSYBOX_CONFIG_FEATURE_SH_IS_NONE + bool "none" + +endchoice + +choice + prompt "Choose which shell is aliased to 'bash' name" + default BUSYBOX_CONFIG_FEATURE_BASH_IS_NONE + 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 BUSYBOX_CONFIG_FEATURE_BASH_IS_ASH + depends on BUSYBOX_CONFIG_ASH + bool "ash" + depends on !BUSYBOX_CONFIG_NOMMU + +config BUSYBOX_CONFIG_FEATURE_BASH_IS_HUSH + depends on BUSYBOX_CONFIG_HUSH + bool "hush" + +config BUSYBOX_CONFIG_FEATURE_BASH_IS_NONE + bool "none" + +endchoice + + +config BUSYBOX_CONFIG_LASH + bool "lash (deprecated: aliased to hush)" + default n + select BUSYBOX_CONFIG_HUSH + help + lash is deprecated and will be removed, please migrate to hush. config BUSYBOX_CONFIG_MSH - bool "msh" + bool "msh (deprecated: please use hush)" default n - select BUSYBOX_CONFIG_TRUE - select BUSYBOX_CONFIG_FALSE - select BUSYBOX_CONFIG_TEST + select BUSYBOX_CONFIG_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 BUSYBOX_CONFIG_SH_MATH_SUPPORT + bool "POSIX math support" + default y + depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_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 also 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 BUSYBOX_CONFIG_MSH || BUSYBOX_CONFIG_LASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH +config BUSYBOX_CONFIG_SH_MATH_SUPPORT_64 + bool "Extend POSIX math support to 64 bit" + default y + depends on BUSYBOX_CONFIG_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 BUSYBOX_CONFIG_FEATURE_SH_EXTRA_QUIET bool "Hide message on interactive shell startup" default n - depends on BUSYBOX_CONFIG_MSH || BUSYBOX_CONFIG_LASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH + depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH help Remove the busybox introduction when starting a shell. -config BUSYBOX_CONFIG_FEATURE_SH_STANDALONE_SHELL +config BUSYBOX_CONFIG_FEATURE_SH_STANDALONE bool "Standalone shell" default n - depends on BUSYBOX_CONFIG_MSH || BUSYBOX_CONFIG_LASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH + depends on (BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS help - This option causes the selected busybox shell to use busybox applets - in preference to executables in the PATH whenever possible. For + This option causes busybox shells to use busybox applets + in preference to executables in the PATH whenever possible. For 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 - 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. - Note that this will *also* cause applets to take precedence - 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. + This is implemented by re-execing /proc/self/exe (typically) + with right parameters. Some selected applets ("NOFORK" applets) + can even be executed without creating new process. + Instead, busybox will call _main() internally. + + However, this causes problems in chroot jails without mounted /proc + and with ps/top (command name can be shown as 'exe' for applets + 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 +# 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 +# that exact location with that exact name, this option will not work at +# all. + +config BUSYBOX_CONFIG_FEATURE_SH_NOFORK + bool "Run 'nofork' applets directly" + default n + depends on (BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS + help + This option causes busybox shells [currently only ash] + to not execute typical fork/exec/wait sequence, but call _main + directly, if possible. (Sometimes it is not possible: for example, + this is not possible in pipes). - 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 - that exact location with that exact name, this option will not work at - all. + This will be done only for some applets (those which are marked + NOFORK in include/applets.h). -config BUSYBOX_CONFIG_FEATURE_COMMAND_EDITING - bool "Command line editing" - default y - depends on BUSYBOX_CONFIG_MSH || BUSYBOX_CONFIG_LASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH - help - Enable command editing in shell. + This may significantly speed up some shell scripts. + + This feature is relatively new. Use with care. -config BUSYBOX_CONFIG_FEATURE_COMMAND_EDITING_VI - bool "vi-style line editing commands" +config BUSYBOX_CONFIG_CTTYHACK + bool "cttyhack" default n - depends on BUSYBOX_CONFIG_FEATURE_COMMAND_EDITING help - Enable vi-style line editing in the shell. This mode can be - turned on and off with "set -o vi" and "set +o vi". + 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. -config BUSYBOX_CONFIG_FEATURE_COMMAND_HISTORY - int "History size" - default 15 - depends on BUSYBOX_CONFIG_FEATURE_COMMAND_EDITING - help - Specify command history size in shell. + Proper solution is to use correct device instead of /dev/console. -config BUSYBOX_CONFIG_FEATURE_COMMAND_SAVEHISTORY - bool "History saving" - default n - depends on BUSYBOX_CONFIG_ASH && BUSYBOX_CONFIG_FEATURE_COMMAND_EDITING - help - Enable history saving in ash shell. + 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. -config BUSYBOX_CONFIG_FEATURE_COMMAND_TAB_COMPLETION - bool "Tab completion" - default y - depends on BUSYBOX_CONFIG_FEATURE_COMMAND_EDITING - help - Enable tab completion in shell. + Example for /etc/inittab (for busybox init): -config BUSYBOX_CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION - bool "Username completion" - default n - depends on BUSYBOX_CONFIG_FEATURE_COMMAND_TAB_COMPLETION - help - Enable username completion in shell. + ::respawn:/bin/cttyhack /bin/sh -config BUSYBOX_CONFIG_FEATURE_SH_FANCY_PROMPT - bool "Fancy shell prompts" - default y - depends on BUSYBOX_CONFIG_FEATURE_COMMAND_EDITING - help - Setting this option allows for prompts to use things like \w and - \$ and also using escape codes. + Giving controlling tty to shell running with PID 1: + + $ exec cttyhack sh + + Starting an interactive shell from boot shell script: + + setsid cttyhack sh endmenu