434 lines
14 KiB
Text
434 lines
14 KiB
Text
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# DO NOT EDIT. This file is generated from Config.src
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#
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# For a description of the syntax of this configuration file,
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# see scripts/kbuild/config-language.txt.
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#
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menu "Shells"
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config BUSYBOX_CONFIG_ASH
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bool "ash"
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default BUSYBOX_DEFAULT_ASH
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depends on !BUSYBOX_CONFIG_NOMMU
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help
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Tha 'ash' shell adds about 60k in the default configuration and is
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the most complete and most pedantically correct shell included with
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busybox. This shell is actually a derivative of the Debian 'dash'
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shell (by Herbert Xu), which was created by porting the 'ash' shell
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(written by Kenneth Almquist) from NetBSD.
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config BUSYBOX_CONFIG_ASH_BASH_COMPAT
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bool "bash-compatible extensions"
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default BUSYBOX_DEFAULT_ASH_BASH_COMPAT
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable bash-compatible extensions.
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config BUSYBOX_CONFIG_ASH_IDLE_TIMEOUT
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bool "Idle timeout variable"
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default BUSYBOX_DEFAULT_ASH_IDLE_TIMEOUT
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depends on BUSYBOX_CONFIG_ASH
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help
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Enables bash-like auto-logout after $TMOUT seconds of idle time.
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config BUSYBOX_CONFIG_ASH_JOB_CONTROL
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bool "Job control"
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default BUSYBOX_DEFAULT_ASH_JOB_CONTROL
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable job control in the ash shell.
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config BUSYBOX_CONFIG_ASH_ALIAS
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bool "Alias support"
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default BUSYBOX_DEFAULT_ASH_ALIAS
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable alias support in the ash shell.
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config BUSYBOX_CONFIG_ASH_GETOPTS
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bool "Builtin getopt to parse positional parameters"
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default BUSYBOX_DEFAULT_ASH_GETOPTS
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable support for getopts builtin in ash.
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config BUSYBOX_CONFIG_ASH_BUILTIN_ECHO
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bool "Builtin version of 'echo'"
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default BUSYBOX_DEFAULT_ASH_BUILTIN_ECHO
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable support for echo builtin in ash.
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config BUSYBOX_CONFIG_ASH_BUILTIN_PRINTF
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bool "Builtin version of 'printf'"
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default BUSYBOX_DEFAULT_ASH_BUILTIN_PRINTF
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable support for printf builtin in ash.
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config BUSYBOX_CONFIG_ASH_BUILTIN_TEST
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bool "Builtin version of 'test'"
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default BUSYBOX_DEFAULT_ASH_BUILTIN_TEST
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable support for test builtin in ash.
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config BUSYBOX_CONFIG_ASH_CMDCMD
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bool "'command' command to override shell builtins"
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default BUSYBOX_DEFAULT_ASH_CMDCMD
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable support for the ash 'command' builtin, which allows
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you to run the specified command with the specified arguments,
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even when there is an ash builtin command with the same name.
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config BUSYBOX_CONFIG_ASH_MAIL
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bool "Check for new mail on interactive shells"
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default BUSYBOX_DEFAULT_ASH_MAIL
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable "check for new mail" function in the ash shell.
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config BUSYBOX_CONFIG_ASH_OPTIMIZE_FOR_SIZE
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bool "Optimize for size instead of speed"
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default BUSYBOX_DEFAULT_ASH_OPTIMIZE_FOR_SIZE
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depends on BUSYBOX_CONFIG_ASH
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help
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Compile ash for reduced size at the price of speed.
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config BUSYBOX_CONFIG_ASH_RANDOM_SUPPORT
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bool "Pseudorandom generator and $RANDOM variable"
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default BUSYBOX_DEFAULT_ASH_RANDOM_SUPPORT
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depends on BUSYBOX_CONFIG_ASH
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help
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Enable pseudorandom generator and dynamic variable "$RANDOM".
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Each read of "$RANDOM" will generate a new pseudorandom value.
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You can reset the generator by using a specified start value.
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After "unset RANDOM" the generator will switch off and this
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variable will no longer have special treatment.
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config BUSYBOX_CONFIG_ASH_EXPAND_PRMT
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bool "Expand prompt string"
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default BUSYBOX_DEFAULT_ASH_EXPAND_PRMT
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depends on BUSYBOX_CONFIG_ASH
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help
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"PS#" may contain volatile content, such as backquote commands.
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This option recreates the prompt string from the environment
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variable each time it is displayed.
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config BUSYBOX_CONFIG_CTTYHACK
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bool "cttyhack"
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default BUSYBOX_DEFAULT_CTTYHACK
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help
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One common problem reported on the mailing list is the "can't
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access tty; job control turned off" error message, which typically
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appears when one tries to use a shell with stdin/stdout on
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/dev/console.
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This device is special - it cannot be a controlling tty.
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The proper solution is to use the correct device instead of
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/dev/console.
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cttyhack provides a "quick and dirty" solution to this problem.
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It analyzes stdin with various ioctls, trying to determine whether
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it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line).
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On Linux it also checks sysfs for a pointer to the active console.
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If cttyhack is able to find the real console device, it closes
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stdin/out/err and reopens that device.
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Then it executes the given program. Opening the device will make
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that device a controlling tty. This may require cttyhack
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to be a session leader.
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Example for /etc/inittab (for busybox init):
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::respawn:/bin/cttyhack /bin/sh
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Starting an interactive shell from boot shell script:
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setsid cttyhack sh
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Giving controlling tty to shell running with PID 1:
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# exec cttyhack sh
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Without cttyhack, you need to know exact tty name,
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and do something like this:
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# exec setsid sh -c 'exec sh </dev/tty1 >/dev/tty1 2>&1'
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config BUSYBOX_CONFIG_HUSH
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bool "hush"
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default BUSYBOX_DEFAULT_HUSH
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help
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hush is a small shell (25k). It handles the normal flow control
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constructs such as if/then/elif/else/fi, for/in/do/done, while loops,
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case/esac. Redirections, here documents, $((arithmetic))
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and functions are supported.
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It will compile and work on no-mmu systems.
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It does not handle select, aliases, tilde expansion,
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&>file and >&file redirection of stdout+stderr.
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config BUSYBOX_CONFIG_HUSH_BASH_COMPAT
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bool "bash-compatible extensions"
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default BUSYBOX_DEFAULT_HUSH_BASH_COMPAT
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depends on BUSYBOX_CONFIG_HUSH
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help
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Enable bash-compatible extensions.
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config BUSYBOX_CONFIG_HUSH_BRACE_EXPANSION
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bool "Brace expansion"
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default BUSYBOX_DEFAULT_HUSH_BRACE_EXPANSION
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depends on BUSYBOX_CONFIG_HUSH_BASH_COMPAT
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help
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Enable {abc,def} extension.
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config BUSYBOX_CONFIG_HUSH_HELP
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bool "help builtin"
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default BUSYBOX_DEFAULT_HUSH_HELP
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depends on BUSYBOX_CONFIG_HUSH
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help
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Enable help builtin in hush. Code size + ~1 kbyte.
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config BUSYBOX_CONFIG_HUSH_INTERACTIVE
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bool "Interactive mode"
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default BUSYBOX_DEFAULT_HUSH_INTERACTIVE
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depends on BUSYBOX_CONFIG_HUSH
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help
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Enable interactive mode (prompt and command editing).
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Without this, hush simply reads and executes commands
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from stdin just like a shell script from a file.
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No prompt, no PS1/PS2 magic shell variables.
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config BUSYBOX_CONFIG_HUSH_SAVEHISTORY
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bool "Save command history to .hush_history"
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default BUSYBOX_DEFAULT_HUSH_SAVEHISTORY
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depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE && BUSYBOX_CONFIG_FEATURE_EDITING_SAVEHISTORY
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help
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Enable history saving in hush.
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config BUSYBOX_CONFIG_HUSH_JOB
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bool "Job control"
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default BUSYBOX_DEFAULT_HUSH_JOB
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depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE
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help
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Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current
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command (not entire shell), fg/bg builtins work. Without this option,
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"cmd &" still works by simply spawning a process and immediately
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prompting for next command (or executing next command in a script),
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but no separate process group is formed.
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config BUSYBOX_CONFIG_HUSH_TICK
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bool "Process substitution"
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default BUSYBOX_DEFAULT_HUSH_TICK
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depends on BUSYBOX_CONFIG_HUSH
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help
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Enable process substitution `command` and $(command) in hush.
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config BUSYBOX_CONFIG_HUSH_IF
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bool "Support if/then/elif/else/fi"
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default BUSYBOX_DEFAULT_HUSH_IF
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depends on BUSYBOX_CONFIG_HUSH
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help
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Enable if/then/elif/else/fi in hush.
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config BUSYBOX_CONFIG_HUSH_LOOPS
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bool "Support for, while and until loops"
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default BUSYBOX_DEFAULT_HUSH_LOOPS
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depends on BUSYBOX_CONFIG_HUSH
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help
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Enable for, while and until loops in hush.
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config BUSYBOX_CONFIG_HUSH_CASE
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bool "Support case ... esac statement"
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default BUSYBOX_DEFAULT_HUSH_CASE
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depends on BUSYBOX_CONFIG_HUSH
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help
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Enable case ... esac statement in hush. +400 bytes.
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config BUSYBOX_CONFIG_HUSH_FUNCTIONS
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bool "Support funcname() { commands; } syntax"
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default BUSYBOX_DEFAULT_HUSH_FUNCTIONS
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depends on BUSYBOX_CONFIG_HUSH
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help
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Enable support for shell functions in hush. +800 bytes.
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config BUSYBOX_CONFIG_HUSH_LOCAL
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bool "Support local builtin"
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default BUSYBOX_DEFAULT_HUSH_LOCAL
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depends on BUSYBOX_CONFIG_HUSH_FUNCTIONS
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help
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Enable support for local variables in functions.
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config BUSYBOX_CONFIG_HUSH_RANDOM_SUPPORT
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bool "Pseudorandom generator and $RANDOM variable"
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default BUSYBOX_DEFAULT_HUSH_RANDOM_SUPPORT
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depends on BUSYBOX_CONFIG_HUSH
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help
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Enable pseudorandom generator and dynamic variable "$RANDOM".
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Each read of "$RANDOM" will generate a new pseudorandom value.
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config BUSYBOX_CONFIG_HUSH_EXPORT_N
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bool "Support 'export -n' option"
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default BUSYBOX_DEFAULT_HUSH_EXPORT_N
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depends on BUSYBOX_CONFIG_HUSH
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help
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export -n unexports variables. It is a bash extension.
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config BUSYBOX_CONFIG_HUSH_MODE_X
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bool "Support 'hush -x' option and 'set -x' command"
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default BUSYBOX_DEFAULT_HUSH_MODE_X
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depends on BUSYBOX_CONFIG_HUSH
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help
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This instructs hush to print commands before execution.
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Adds ~300 bytes.
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config BUSYBOX_CONFIG_MSH
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bool "msh (deprecated: aliased to hush)"
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default BUSYBOX_DEFAULT_MSH
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select BUSYBOX_CONFIG_HUSH
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help
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msh is deprecated and will be removed, please migrate to hush.
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choice
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prompt "Choose which shell is aliased to 'sh' name"
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default BUSYBOX_CONFIG_FEATURE_SH_IS_ASH
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help
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Choose which shell you want to be executed by 'sh' alias.
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The ash shell is the most bash compatible and full featured one.
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# note: cannot use "select ASH" here, it breaks "make allnoconfig"
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config BUSYBOX_CONFIG_FEATURE_SH_IS_ASH
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depends on BUSYBOX_CONFIG_ASH
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bool "ash"
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depends on !BUSYBOX_CONFIG_NOMMU
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config BUSYBOX_CONFIG_FEATURE_SH_IS_HUSH
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depends on BUSYBOX_CONFIG_HUSH
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bool "hush"
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config BUSYBOX_CONFIG_FEATURE_SH_IS_NONE
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bool "none"
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endchoice
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choice
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prompt "Choose which shell is aliased to 'bash' name"
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default BUSYBOX_CONFIG_FEATURE_BASH_IS_NONE
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help
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Choose which shell you want to be executed by 'bash' alias.
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The ash shell is the most bash compatible and full featured one.
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Note that selecting this option does not switch on any bash
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compatibility code. It merely makes it possible to install
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/bin/bash (sym)link and run scripts which start with
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#!/bin/bash line.
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Many systems use it in scripts which use bash-specific features,
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even simple ones like $RANDOM. Without this option, busybox
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can't be used for running them because it won't recongnize
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"bash" as a supported applet name.
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config BUSYBOX_CONFIG_FEATURE_BASH_IS_ASH
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depends on BUSYBOX_CONFIG_ASH
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bool "ash"
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depends on !BUSYBOX_CONFIG_NOMMU
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config BUSYBOX_CONFIG_FEATURE_BASH_IS_HUSH
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depends on BUSYBOX_CONFIG_HUSH
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bool "hush"
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config BUSYBOX_CONFIG_FEATURE_BASH_IS_NONE
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bool "none"
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endchoice
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config BUSYBOX_CONFIG_SH_MATH_SUPPORT
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bool "POSIX math support"
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default BUSYBOX_DEFAULT_SH_MATH_SUPPORT
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depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_HUSH
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help
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Enable math support in the shell via $((...)) syntax.
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config BUSYBOX_CONFIG_SH_MATH_SUPPORT_64
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bool "Extend POSIX math support to 64 bit"
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default BUSYBOX_DEFAULT_SH_MATH_SUPPORT_64
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depends on BUSYBOX_CONFIG_SH_MATH_SUPPORT
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help
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Enable 64-bit math support in the shell. This will make the shell
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slightly larger, but will allow computation with very large numbers.
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This is not in POSIX, so do not rely on this in portable code.
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config BUSYBOX_CONFIG_FEATURE_SH_EXTRA_QUIET
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bool "Hide message on interactive shell startup"
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||
|
|
default BUSYBOX_DEFAULT_FEATURE_SH_EXTRA_QUIET
|
||
|
|
depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH
|
||
|
|
help
|
||
|
|
Remove the busybox introduction when starting a shell.
|
||
|
|
|
||
|
|
config BUSYBOX_CONFIG_FEATURE_SH_STANDALONE
|
||
|
|
bool "Standalone shell"
|
||
|
|
default BUSYBOX_DEFAULT_FEATURE_SH_STANDALONE
|
||
|
|
depends on (BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
|
||
|
|
help
|
||
|
|
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 BUSYBOX_CONFIG_FEATURE_SH_NOFORK
|
||
|
|
bool "Run 'nofork' applets directly"
|
||
|
|
default BUSYBOX_DEFAULT_FEATURE_SH_NOFORK
|
||
|
|
depends on (BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
|
||
|
|
help
|
||
|
|
This option causes busybox shells 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).
|
||
|
|
|
||
|
|
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. Report bugs
|
||
|
|
to project mailing list.
|
||
|
|
|
||
|
|
config BUSYBOX_CONFIG_FEATURE_SH_HISTFILESIZE
|
||
|
|
bool "Use $HISTFILESIZE"
|
||
|
|
default BUSYBOX_DEFAULT_FEATURE_SH_HISTFILESIZE
|
||
|
|
depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH
|
||
|
|
help
|
||
|
|
This option makes busybox shells to use $HISTFILESIZE variable
|
||
|
|
to set shell history size. Note that its max value is capped
|
||
|
|
by "History size" setting in library tuning section.
|
||
|
|
|
||
|
|
|
||
|
|
endmenu
|