package/utils/busybox/config/shell/Config.in

   1 # DO NOT EDIT. This file is generated from Config.src
   2 #
   3 # For a description of the syntax of this configuration file,
   4 # see scripts/kbuild/config-language.txt.
   5 #
   6
   7 menu "Shells"
   8
   9 config BUSYBOX_CONFIG_ASH
  10         bool "ash"
  11         default BUSYBOX_DEFAULT_ASH
  12         depends on !BUSYBOX_CONFIG_NOMMU
  13         help
  14           Tha 'ash' shell adds about 60k in the default configuration and is
  15           the most complete and most pedantically correct shell included with
  16           busybox. This shell is actually a derivative of the Debian 'dash'
  17           shell (by Herbert Xu), which was created by porting the 'ash' shell
  18           (written by Kenneth Almquist) from NetBSD.
  19
  20 config BUSYBOX_CONFIG_ASH_BASH_COMPAT
  21         bool "bash-compatible extensions"
  22         default BUSYBOX_DEFAULT_ASH_BASH_COMPAT
  23         depends on BUSYBOX_CONFIG_ASH
  24         help
  25           Enable bash-compatible extensions.
  26
  27 config BUSYBOX_CONFIG_ASH_IDLE_TIMEOUT
  28         bool "Idle timeout variable"
  29         default BUSYBOX_DEFAULT_ASH_IDLE_TIMEOUT
  30         depends on BUSYBOX_CONFIG_ASH
  31         help
  32           Enables bash-like auto-logout after $TMOUT seconds of idle time.
  33
  34 config BUSYBOX_CONFIG_ASH_JOB_CONTROL
  35         bool "Job control"
  36         default BUSYBOX_DEFAULT_ASH_JOB_CONTROL
  37         depends on BUSYBOX_CONFIG_ASH
  38         help
  39           Enable job control in the ash shell.
  40
  41 config BUSYBOX_CONFIG_ASH_ALIAS
  42         bool "Alias support"
  43         default BUSYBOX_DEFAULT_ASH_ALIAS
  44         depends on BUSYBOX_CONFIG_ASH
  45         help
  46           Enable alias support in the ash shell.
  47
  48 config BUSYBOX_CONFIG_ASH_GETOPTS
  49         bool "Builtin getopt to parse positional parameters"
  50         default BUSYBOX_DEFAULT_ASH_GETOPTS
  51         depends on BUSYBOX_CONFIG_ASH
  52         help
  53           Enable support for getopts builtin in ash.
  54
  55 config BUSYBOX_CONFIG_ASH_BUILTIN_ECHO
  56         bool "Builtin version of 'echo'"
  57         default BUSYBOX_DEFAULT_ASH_BUILTIN_ECHO
  58         depends on BUSYBOX_CONFIG_ASH
  59         help
  60           Enable support for echo builtin in ash.
  61
  62 config BUSYBOX_CONFIG_ASH_BUILTIN_PRINTF
  63         bool "Builtin version of 'printf'"
  64         default BUSYBOX_DEFAULT_ASH_BUILTIN_PRINTF
  65         depends on BUSYBOX_CONFIG_ASH
  66         help
  67           Enable support for printf builtin in ash.
  68
  69 config BUSYBOX_CONFIG_ASH_BUILTIN_TEST
  70         bool "Builtin version of 'test'"
  71         default BUSYBOX_DEFAULT_ASH_BUILTIN_TEST
  72         depends on BUSYBOX_CONFIG_ASH
  73         help
  74           Enable support for test builtin in ash.
  75
  76 config BUSYBOX_CONFIG_ASH_CMDCMD
  77         bool "'command' command to override shell builtins"
  78         default BUSYBOX_DEFAULT_ASH_CMDCMD
  79         depends on BUSYBOX_CONFIG_ASH
  80         help
  81           Enable support for the ash 'command' builtin, which allows
  82           you to run the specified command with the specified arguments,
  83           even when there is an ash builtin command with the same name.
  84
  85 config BUSYBOX_CONFIG_ASH_MAIL
  86         bool "Check for new mail on interactive shells"
  87         default BUSYBOX_DEFAULT_ASH_MAIL
  88         depends on BUSYBOX_CONFIG_ASH
  89         help
  90           Enable "check for new mail" function in the ash shell.
  91
  92 config BUSYBOX_CONFIG_ASH_OPTIMIZE_FOR_SIZE
  93         bool "Optimize for size instead of speed"
  94         default BUSYBOX_DEFAULT_ASH_OPTIMIZE_FOR_SIZE
  95         depends on BUSYBOX_CONFIG_ASH
  96         help
  97           Compile ash for reduced size at the price of speed.
  98
  99 config BUSYBOX_CONFIG_ASH_RANDOM_SUPPORT
 100         bool "Pseudorandom generator and $RANDOM variable"
 101         default BUSYBOX_DEFAULT_ASH_RANDOM_SUPPORT
 102         depends on BUSYBOX_CONFIG_ASH
 103         help
 104           Enable pseudorandom generator and dynamic variable "$RANDOM".
 105           Each read of "$RANDOM" will generate a new pseudorandom value.
 106           You can reset the generator by using a specified start value.
 107           After "unset RANDOM" the generator will switch off and this
 108           variable will no longer have special treatment.
 109
 110 config BUSYBOX_CONFIG_ASH_EXPAND_PRMT
 111         bool "Expand prompt string"
 112         default BUSYBOX_DEFAULT_ASH_EXPAND_PRMT
 113         depends on BUSYBOX_CONFIG_ASH
 114         help
 115           "PS#" may contain volatile content, such as backquote commands.
 116           This option recreates the prompt string from the environment
 117           variable each time it is displayed.
 118
 119 config BUSYBOX_CONFIG_CTTYHACK
 120         bool "cttyhack"
 121         default BUSYBOX_DEFAULT_CTTYHACK
 122         help
 123           One common problem reported on the mailing list is the "can't
 124           access tty; job control turned off" error message, which typically
 125           appears when one tries to use a shell with stdin/stdout on
 126           /dev/console.
 127           This device is special - it cannot be a controlling tty.
 128
 129           The proper solution is to use the correct device instead of
 130           /dev/console.
 131
 132           cttyhack provides a "quick and dirty" solution to this problem.
 133           It analyzes stdin with various ioctls, trying to determine whether
 134           it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line).
 135           On Linux it also checks sysfs for a pointer to the active console.
 136           If cttyhack is able to find the real console device, it closes
 137           stdin/out/err and reopens that device.
 138           Then it executes the given program. Opening the device will make
 139           that device a controlling tty. This may require cttyhack
 140           to be a session leader.
 141
 142           Example for /etc/inittab (for busybox init):
 143
 144           ::respawn:/bin/cttyhack /bin/sh
 145
 146           Starting an interactive shell from boot shell script:
 147
 148           setsid cttyhack sh
 149
 150           Giving controlling tty to shell running with PID 1:
 151
 152           # exec cttyhack sh
 153
 154           Without cttyhack, you need to know exact tty name,
 155           and do something like this:
 156
 157           # exec setsid sh -c 'exec sh </dev/tty1 >/dev/tty1 2>&1'
 158
 159           Starting getty on a controlling tty from a shell script:
 160
 161           # getty 115200 $(cttyhack)
 162 config BUSYBOX_CONFIG_HUSH
 163         bool "hush"
 164         default BUSYBOX_DEFAULT_HUSH
 165         help
 166           hush is a small shell (25k). It handles the normal flow control
 167           constructs such as if/then/elif/else/fi, for/in/do/done, while loops,
 168           case/esac. Redirections, here documents, $((arithmetic))
 169           and functions are supported.
 170
 171           It will compile and work on no-mmu systems.
 172
 173           It does not handle select, aliases, tilde expansion,
 174           &>file and >&file redirection of stdout+stderr.
 175
 176 config BUSYBOX_CONFIG_HUSH_BASH_COMPAT
 177         bool "bash-compatible extensions"
 178         default BUSYBOX_DEFAULT_HUSH_BASH_COMPAT
 179         depends on BUSYBOX_CONFIG_HUSH
 180         help
 181           Enable bash-compatible extensions.
 182
 183 config BUSYBOX_CONFIG_HUSH_BRACE_EXPANSION
 184         bool "Brace expansion"
 185         default BUSYBOX_DEFAULT_HUSH_BRACE_EXPANSION
 186         depends on BUSYBOX_CONFIG_HUSH_BASH_COMPAT
 187         help
 188           Enable {abc,def} extension.
 189
 190 config BUSYBOX_CONFIG_HUSH_HELP
 191         bool "help builtin"
 192         default BUSYBOX_DEFAULT_HUSH_HELP
 193         depends on BUSYBOX_CONFIG_HUSH
 194         help
 195           Enable help builtin in hush. Code size + ~1 kbyte.
 196
 197 config BUSYBOX_CONFIG_HUSH_INTERACTIVE
 198         bool "Interactive mode"
 199         default BUSYBOX_DEFAULT_HUSH_INTERACTIVE
 200         depends on BUSYBOX_CONFIG_HUSH
 201         help
 202           Enable interactive mode (prompt and command editing).
 203           Without this, hush simply reads and executes commands
 204           from stdin just like a shell script from a file.
 205           No prompt, no PS1/PS2 magic shell variables.
 206
 207 config BUSYBOX_CONFIG_HUSH_SAVEHISTORY
 208         bool "Save command history to .hush_history"
 209         default BUSYBOX_DEFAULT_HUSH_SAVEHISTORY
 210         depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE && BUSYBOX_CONFIG_FEATURE_EDITING_SAVEHISTORY
 211         help
 212           Enable history saving in hush.
 213
 214 config BUSYBOX_CONFIG_HUSH_JOB
 215         bool "Job control"
 216         default BUSYBOX_DEFAULT_HUSH_JOB
 217         depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE
 218         help
 219           Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current
 220           command (not entire shell), fg/bg builtins work. Without this option,
 221           "cmd &" still works by simply spawning a process and immediately
 222           prompting for next command (or executing next command in a script),
 223           but no separate process group is formed.
 224
 225 config BUSYBOX_CONFIG_HUSH_TICK
 226         bool "Process substitution"
 227         default BUSYBOX_DEFAULT_HUSH_TICK
 228         depends on BUSYBOX_CONFIG_HUSH
 229         help
 230           Enable process substitution `command` and $(command) in hush.
 231
 232 config BUSYBOX_CONFIG_HUSH_IF
 233         bool "Support if/then/elif/else/fi"
 234         default BUSYBOX_DEFAULT_HUSH_IF
 235         depends on BUSYBOX_CONFIG_HUSH
 236         help
 237           Enable if/then/elif/else/fi in hush.
 238
 239 config BUSYBOX_CONFIG_HUSH_LOOPS
 240         bool "Support for, while and until loops"
 241         default BUSYBOX_DEFAULT_HUSH_LOOPS
 242         depends on BUSYBOX_CONFIG_HUSH
 243         help
 244           Enable for, while and until loops in hush.
 245
 246 config BUSYBOX_CONFIG_HUSH_CASE
 247         bool "Support case ... esac statement"
 248         default BUSYBOX_DEFAULT_HUSH_CASE
 249         depends on BUSYBOX_CONFIG_HUSH
 250         help
 251           Enable case ... esac statement in hush. +400 bytes.
 252
 253 config BUSYBOX_CONFIG_HUSH_FUNCTIONS
 254         bool "Support funcname() { commands; } syntax"
 255         default BUSYBOX_DEFAULT_HUSH_FUNCTIONS
 256         depends on BUSYBOX_CONFIG_HUSH
 257         help
 258           Enable support for shell functions in hush. +800 bytes.
 259
 260 config BUSYBOX_CONFIG_HUSH_LOCAL
 261         bool "Support local builtin"
 262         default BUSYBOX_DEFAULT_HUSH_LOCAL
 263         depends on BUSYBOX_CONFIG_HUSH_FUNCTIONS
 264         help
 265           Enable support for local variables in functions.
 266
 267 config BUSYBOX_CONFIG_HUSH_RANDOM_SUPPORT
 268         bool "Pseudorandom generator and $RANDOM variable"
 269         default BUSYBOX_DEFAULT_HUSH_RANDOM_SUPPORT
 270         depends on BUSYBOX_CONFIG_HUSH
 271         help
 272           Enable pseudorandom generator and dynamic variable "$RANDOM".
 273           Each read of "$RANDOM" will generate a new pseudorandom value.
 274
 275 config BUSYBOX_CONFIG_HUSH_EXPORT_N
 276         bool "Support 'export -n' option"
 277         default BUSYBOX_DEFAULT_HUSH_EXPORT_N
 278         depends on BUSYBOX_CONFIG_HUSH
 279         help
 280           export -n unexports variables. It is a bash extension.
 281
 282 config BUSYBOX_CONFIG_HUSH_MODE_X
 283         bool "Support 'hush -x' option and 'set -x' command"
 284         default BUSYBOX_DEFAULT_HUSH_MODE_X
 285         depends on BUSYBOX_CONFIG_HUSH
 286         help
 287           This instructs hush to print commands before execution.
 288           Adds ~300 bytes.
 289
 290 config BUSYBOX_CONFIG_MSH
 291         bool "msh (deprecated: aliased to hush)"
 292         default BUSYBOX_DEFAULT_MSH
 293         select BUSYBOX_CONFIG_HUSH
 294         help
 295           msh is deprecated and will be removed, please migrate to hush.
 296
 297
 298
 299 choice
 300         prompt "Choose which shell is aliased to 'sh' name"
 301         default BUSYBOX_CONFIG_FEATURE_SH_IS_ASH
 302         help
 303           Choose which shell you want to be executed by 'sh' alias.
 304           The ash shell is the most bash compatible and full featured one.
 305
 306 # note: cannot use "select ASH" here, it breaks "make allnoconfig"
 307 config BUSYBOX_CONFIG_FEATURE_SH_IS_ASH
 308         depends on BUSYBOX_CONFIG_ASH
 309         bool "ash"
 310         depends on !BUSYBOX_CONFIG_NOMMU
 311
 312 config BUSYBOX_CONFIG_FEATURE_SH_IS_HUSH
 313         depends on BUSYBOX_CONFIG_HUSH
 314         bool "hush"
 315
 316 config BUSYBOX_CONFIG_FEATURE_SH_IS_NONE
 317         bool "none"
 318
 319 endchoice
 320
 321 choice
 322         prompt "Choose which shell is aliased to 'bash' name"
 323         default BUSYBOX_CONFIG_FEATURE_BASH_IS_NONE
 324         help
 325           Choose which shell you want to be executed by 'bash' alias.
 326           The ash shell is the most bash compatible and full featured one.
 327
 328           Note that selecting this option does not switch on any bash
 329           compatibility code. It merely makes it possible to install
 330           /bin/bash (sym)link and run scripts which start with
 331           #!/bin/bash line.
 332
 333           Many systems use it in scripts which use bash-specific features,
 334           even simple ones like $RANDOM. Without this option, busybox
 335           can't be used for running them because it won't recongnize
 336           "bash" as a supported applet name.
 337
 338 config BUSYBOX_CONFIG_FEATURE_BASH_IS_ASH
 339         depends on BUSYBOX_CONFIG_ASH
 340         bool "ash"
 341         depends on !BUSYBOX_CONFIG_NOMMU
 342
 343 config BUSYBOX_CONFIG_FEATURE_BASH_IS_HUSH
 344         depends on BUSYBOX_CONFIG_HUSH
 345         bool "hush"
 346
 347 config BUSYBOX_CONFIG_FEATURE_BASH_IS_NONE
 348         bool "none"
 349
 350 endchoice
 351
 352
 353 config BUSYBOX_CONFIG_SH_MATH_SUPPORT
 354         bool "POSIX math support"
 355         default BUSYBOX_DEFAULT_SH_MATH_SUPPORT
 356         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_HUSH
 357         help
 358           Enable math support in the shell via $((...)) syntax.
 359
 360 config BUSYBOX_CONFIG_SH_MATH_SUPPORT_64
 361         bool "Extend POSIX math support to 64 bit"
 362         default BUSYBOX_DEFAULT_SH_MATH_SUPPORT_64
 363         depends on BUSYBOX_CONFIG_SH_MATH_SUPPORT
 364         help
 365           Enable 64-bit math support in the shell. This will make the shell
 366           slightly larger, but will allow computation with very large numbers.
 367           This is not in POSIX, so do not rely on this in portable code.
 368
 369 config BUSYBOX_CONFIG_FEATURE_SH_EXTRA_QUIET
 370         bool "Hide message on interactive shell startup"
 371         default BUSYBOX_DEFAULT_FEATURE_SH_EXTRA_QUIET
 372         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH
 373         help
 374           Remove the busybox introduction when starting a shell.
 375
 376 config BUSYBOX_CONFIG_FEATURE_SH_STANDALONE
 377         bool "Standalone shell"
 378         default BUSYBOX_DEFAULT_FEATURE_SH_STANDALONE
 379         depends on (BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
 380         help
 381           This option causes busybox shells to use busybox applets
 382           in preference to executables in the PATH whenever possible. For
 383           example, entering the command 'ifconfig' into the shell would cause
 384           busybox to use the ifconfig busybox applet. Specifying the fully
 385           qualified executable name, such as '/sbin/ifconfig' will still
 386           execute the /sbin/ifconfig executable on the filesystem. This option
 387           is generally used when creating a statically linked version of busybox
 388           for use as a rescue shell, in the event that you screw up your system.
 389
 390           This is implemented by re-execing /proc/self/exe (typically)
 391           with right parameters. Some selected applets ("NOFORK" applets)
 392           can even be executed without creating new process.
 393           Instead, busybox will call <applet>_main() internally.
 394
 395           However, this causes problems in chroot jails without mounted /proc
 396           and with ps/top (command name can be shown as 'exe' for applets
 397           started this way).
 398 # untrue?
 399 #         Note that this will *also* cause applets to take precedence
 400 #         over shell builtins of the same name. So turning this on will
 401 #         eliminate any performance gained by turning on the builtin "echo"
 402 #         and "test" commands in ash.
 403 # untrue?
 404 #         Note that when using this option, the shell will attempt to directly
 405 #         run '/bin/busybox'. If you do not have the busybox binary sitting in
 406 #         that exact location with that exact name, this option will not work at
 407 #         all.
 408
 409 config BUSYBOX_CONFIG_FEATURE_SH_NOFORK
 410         bool "Run 'nofork' applets directly"
 411         default BUSYBOX_DEFAULT_FEATURE_SH_NOFORK
 412         depends on (BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH) && BUSYBOX_CONFIG_FEATURE_PREFER_APPLETS
 413         help
 414           This option causes busybox shells to not execute typical
 415           fork/exec/wait sequence, but call <applet>_main directly,
 416           if possible. (Sometimes it is not possible: for example,
 417           this is not possible in pipes).
 418
 419           This will be done only for some applets (those which are marked
 420           NOFORK in include/applets.h).
 421
 422           This may significantly speed up some shell scripts.
 423
 424           This feature is relatively new. Use with care. Report bugs
 425           to project mailing list.
 426
 427 config BUSYBOX_CONFIG_FEATURE_SH_HISTFILESIZE
 428         bool "Use $HISTFILESIZE"
 429         default BUSYBOX_DEFAULT_FEATURE_SH_HISTFILESIZE
 430         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_ASH
 431         help
 432           This option makes busybox shells to use $HISTFILESIZE variable
 433           to set shell history size. Note that its max value is capped
 434           by "History size" setting in library tuning section.
 435
 436
 437 endmenu