diff options
Diffstat (limited to 'release/src/router/busybox/shell/Config.in')
| -rw-r--r--[-rwxr-xr-x] | release/src/router/busybox/shell/Config.in | 381 |
1 files changed, 262 insertions, 119 deletions
diff --git a/release/src/router/busybox/shell/Config.in b/release/src/router/busybox/shell/Config.in index c1e90994..57969f02 100755..100644 --- a/release/src/router/busybox/shell/Config.in +++ b/release/src/router/busybox/shell/Config.in @@ -3,215 +3,358 @@ # see scripts/kbuild/config-language.txt. # -menu "Another Bourne-like Shell" +menu "Shells" choice prompt "Choose your default shell" - default "none" + default FEATURE_SH_IS_NONE help Choose a shell. The ash shell is the most bash compatible - and full featured. + and full featured one. -config CONFIG_FEATURE_SH_IS_ASH +config FEATURE_SH_IS_ASH + select ASH bool "ash" -config CONFIG_FEATURE_SH_IS_HUSH +config FEATURE_SH_IS_HUSH + select HUSH bool "hush" -config CONFIG_FEATURE_SH_IS_LASH - bool "lash" +####config FEATURE_SH_IS_LASH +#### select LASH +#### bool "lash" -config CONFIG_FEATURE_SH_IS_MSH +config FEATURE_SH_IS_MSH + select MSH bool "msh" -config CONFIG_FEATURE_SH_IS_NONE +config FEATURE_SH_IS_NONE bool "none" endchoice -if CONFIG_FEATURE_SH_IS_ASH - config CONFIG_ASH - default y - - comment "ash (forced enabled as default shell)" -endif - -if !CONFIG_FEATURE_SH_IS_ASH -config CONFIG_ASH +config ASH bool "ash" - default y + default n help - Make sh a link to ash. -endif + 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' + shell (by Herbert Xu), which was created by porting the 'ash' shell + (written by Kenneth Almquist) from NetBSD. comment "Ash Shell Options" - depends on CONFIG_ASH + depends on ASH -config CONFIG_ASH_JOB_CONTROL - bool " Enable Job control" +config ASH_BASH_COMPAT + bool "bash-compatible extensions" default y - depends on CONFIG_ASH + depends on ASH + help + Enable bash-compatible extensions. + +config ASH_JOB_CONTROL + bool "Job control" + default y + depends on ASH help Enable job control in the ash shell. -config CONFIG_ASH_ALIAS - bool " Enable alias support" +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 - depends on CONFIG_ASH + depends on ASH help Enable alias support in the ash shell. -config CONFIG_ASH_MATH_SUPPORT - bool " Enable Posix math support" +config ASH_GETOPTS + bool "Builtin getopt to parse positional parameters" + default n + depends on ASH + help + Enable getopts builtin in the ash shell. + +config ASH_BUILTIN_ECHO + bool "Builtin version of 'echo'" default y - depends on CONFIG_ASH + depends on ASH help - Enable math support in the ash shell. + Enable support for echo, builtin to ash. -config CONFIG_ASH_GETOPTS - bool " Enable getopt builtin to parse positional parameters" - default n - depends on CONFIG_ASH +config ASH_BUILTIN_PRINTF + bool "Builtin version of 'printf'" + default y + depends on ASH help - Enable builtin getopt in the ash shell. + Enable support for printf, builtin to ash. -config CONFIG_ASH_CMDCMD - bool " Enable cmdcmd to override shell builtins" +config ASH_BUILTIN_TEST + bool "Builtin version of 'test'" + default y + depends on ASH + help + Enable support for test, builtin to ash. + +config ASH_CMDCMD + bool "'command' command to override shell builtins" default n - depends on CONFIG_ASH + depends on ASH help Enable support for the ash 'command' builtin, which allows you to run the specified command with the specified arguments, even when there is an ash builtin command with the same name. -config CONFIG_ASH_MAIL - bool " Check for new mail on interactive shells" +config ASH_MAIL + bool "Check for new mail on interactive shells" default y - depends on CONFIG_ASH + depends on ASH help Enable "check for new mail" in the ash shell. -config CONFIG_ASH_OPTIMIZE_FOR_SIZE - bool " Optimize for size instead of speed" +config ASH_OPTIMIZE_FOR_SIZE + bool "Optimize for size instead of speed" default y - depends on CONFIG_ASH + depends on ASH help - Compile ash for reduced size at price of speed. + Compile ash for reduced size at the price of speed. -if CONFIG_FEATURE_SH_IS_HUSH - config CONFIG_HUSH - default y +config ASH_RANDOM_SUPPORT + 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" the generator will switch off and this + variable will no longer have special treatment. + +config ASH_EXPAND_PRMT + bool "Expand prompt string" + default n + depends on ASH + help + "PS#" may contain volatile content, such as backquote commands. + This option recreates the prompt string from the environment + variable each time it is displayed. - comment "hush (forced enabled as default shell)" -endif - -if !CONFIG_FEATURE_SH_IS_HUSH -config CONFIG_HUSH +config HUSH bool "hush" default n help - Make sh a link to hush. -endif + 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. -if CONFIG_FEATURE_SH_IS_LASH - config CONFIG_LASH - default y + It will compile and work on no-mmu systems. - comment "lash (forced enabled as default shell)" -endif + It does not handle select, aliases, brace expansion, + tilde expansion, &>file and >&file redirection of stdout+stderr. -if !CONFIG_FEATURE_SH_IS_LASH -config CONFIG_LASH - bool "lash" +config HUSH_HELP + bool "help builtin" default n + depends on HUSH help - Make sh a link to lash. -endif + Enable help builtin in hush. Code size + ~1 kbyte. -if CONFIG_FEATURE_SH_IS_MSH - config CONFIG_MSH +config HUSH_INTERACTIVE + bool "Interactive mode" default y + depends on 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 the file. + No prompt, no PS1/PS2 magic shell variables. - comment "msh (forced enabled as default shell)" -endif +config HUSH_JOB + bool "Job control" + default n + depends on 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 HUSH_TICK + bool "Process substitution" + default n + depends on HUSH + help + Enable process substitution `command` and $(command) in hush. -if !CONFIG_FEATURE_SH_IS_MSH -config CONFIG_MSH - bool "msh" +config HUSH_IF + bool "Support if/then/elif/else/fi" default n + depends on HUSH help - Make sh a link to msh. -endif + 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. -comment "Bourne Shell Options" - depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH +config HUSH_CASE + bool "Support case ... esac statement" + default n + depends on HUSH + help + Enable case ... esac statement in hush. +400 bytes. -config CONFIG_FEATURE_COMMAND_EDITING - bool "command line editing" +config HUSH_FUNCTIONS + bool "Support funcname() { commands; } syntax" default n - depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH + depends on HUSH help - Enable command editing in shell. + Enable support for shell functions in hush. +800 bytes. -config CONFIG_FEATURE_COMMAND_SAVEHISTORY - bool " history saving" +config HUSH_EXPORT_N + bool "Support export '-n' option" default n - depends on CONFIG_ASH + depends on HUSH help - Enable history saving in ash shell. + Enable support for export '-n' option in hush. It is a bash extension. -config CONFIG_FEATURE_COMMAND_TAB_COMPLETION - bool "tab completion" +config LASH + bool "lash (deprecated: aliased to hush)" default n - depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH + select HUSH help - Enable tab completion in shell. + lash is deprecated and will be removed, please migrate to hush. -config CONFIG_FEATURE_COMMAND_USERNAME_COMPLETION - bool "username completion" +config MSH + bool "msh (deprecated: please use hush)" default n - depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH help - Enable username completion in shell. + 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 CONFIG_FEATURE_COMMAND_HISTORY - int "history size" - default 15 - depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_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 - Specify command history size in shell. + Enable math support in the shell via $((...)) syntax. -config CONFIG_FEATURE_SH_STANDALONE_SHELL - bool "Standalone shell" +config SH_MATH_SUPPORT_64 + bool "Extend POSIX math support to 64 bit" default n - depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH + depends on SH_MATH_SUPPORT help - Have all the busybox commands built into the shell, creating - a standalone shell. + 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 CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN - bool "Standalone shell -- applets always win" +config FEATURE_SH_EXTRA_QUIET + bool "Hide message on interactive shell startup" default n - depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH + depends on MSH || LASH || HUSH || ASH help - Use a command builtin to the shell over one with the same name, - that may be on the system. + Remove the busybox introduction when starting a shell. -config CONFIG_FEATURE_SH_FANCY_PROMPT - bool "Fancy shell prompts" +config FEATURE_SH_STANDALONE + bool "Standalone shell" default n - depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH + depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS help - Setting this option allows for prompts to use things like \w and - \$ and also using escape codes. + 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 + qualified executable name, such as '/sbin/ifconfig' will still + 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. + + 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 <applet>_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 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). -config CONFIG_FEATURE_SH_EXTRA_QUIET - bool "Hide message on interactive shell startup" + 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 - depends on CONFIG_MSH || CONFIG_LASH || CONFIG_HUSH || CONFIG_ASH help - Remove the busybox introduction when starting a shell. + 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. -endmenu + 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. Usage example for /etc/inittab + (for busybox init): + + ::respawn:/bin/cttyhack /bin/sh + +endmenu |