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
  10 choice
  11         prompt "Choose which shell is aliased to 'sh' name"
  12         default BUSYBOX_CONFIG_SH_IS_ASH
  13         help
  14         Choose which shell you want to be executed by 'sh' alias.
  15         The ash shell is the most bash compatible and full featured one.
  16
  17 # note: cannot use "select ASH" here, it breaks "make allnoconfig"
  18 config BUSYBOX_CONFIG_SH_IS_ASH
  19         depends on !BUSYBOX_CONFIG_NOMMU
  20         bool "ash"
  21         help
  22         Choose ash to be the shell executed by 'sh' name.
  23         The ash code will be built into busybox. If you don't select
  24         "ash" choice (CONFIG_ASH), this shell may only be invoked by
  25         the name 'sh' (and not 'ash').
  26
  27 config BUSYBOX_CONFIG_SH_IS_HUSH
  28         bool "hush"
  29         help
  30         Choose hush to be the shell executed by 'sh' name.
  31         The hush code will be built into busybox. If you don't select
  32         "hush" choice (CONFIG_HUSH), this shell may only be invoked by
  33         the name 'sh' (and not 'hush').
  34
  35 config BUSYBOX_CONFIG_SH_IS_NONE
  36         bool "none"
  37
  38 endchoice
  39
  40 choice
  41         prompt "Choose which shell is aliased to 'bash' name"
  42         default BUSYBOX_CONFIG_BASH_IS_NONE
  43         help
  44         Choose which shell you want to be executed by 'bash' alias.
  45         The ash shell is the most bash compatible and full featured one,
  46         although compatibility is far from being complete.
  47
  48         Note that selecting this option does not switch on any bash
  49         compatibility code. It merely makes it possible to install
  50         /bin/bash (sym)link and run scripts which start with
  51         #!/bin/bash line.
  52
  53         Many systems use it in scripts which use bash-specific features,
  54         even simple ones like $RANDOM. Without this option, busybox
  55         can't be used for running them because it won't recongnize
  56         "bash" as a supported applet name.
  57
  58 config BUSYBOX_CONFIG_BASH_IS_ASH
  59         depends on !BUSYBOX_CONFIG_NOMMU
  60         bool "ash"
  61         help
  62         Choose ash to be the shell executed by 'bash' name.
  63         The ash code will be built into busybox. If you don't select
  64         "ash" choice (CONFIG_ASH), this shell may only be invoked by
  65         the name 'bash' (and not 'ash').
  66
  67 config BUSYBOX_CONFIG_BASH_IS_HUSH
  68         bool "hush"
  69         help
  70         Choose hush to be the shell executed by 'bash' name.
  71         The hush code will be built into busybox. If you don't select
  72         "hush" choice (CONFIG_HUSH), this shell may only be invoked by
  73         the name 'bash' (and not 'hush').
  74
  75 config BUSYBOX_CONFIG_BASH_IS_NONE
  76         bool "none"
  77
  78 endchoice
  79
  80
  81 config BUSYBOX_CONFIG_ASH
  82         bool "ash"
  83         default BUSYBOX_DEFAULT_ASH
  84         depends on !BUSYBOX_CONFIG_NOMMU
  85         help
  86         Tha 'ash' shell adds about 60k in the default configuration and is
  87         the most complete and most pedantically correct shell included with
  88         busybox. This shell is actually a derivative of the Debian 'dash'
  89         shell (by Herbert Xu), which was created by porting the 'ash' shell
  90         (written by Kenneth Almquist) from NetBSD.
  91
  92 # ash options
  93 # note: Don't remove !NOMMU part in the next line; it would break
  94 # menuconfig's indenting.
  95 if !NOMMU && (BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH)
  96
  97 config BUSYBOX_CONFIG_ASH_OPTIMIZE_FOR_SIZE
  98         bool "Optimize for size instead of speed"
  99         default BUSYBOX_DEFAULT_ASH_OPTIMIZE_FOR_SIZE
 100         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 101
 102 config BUSYBOX_CONFIG_ASH_INTERNAL_GLOB
 103         bool "Use internal glob() implementation"
 104         default BUSYBOX_DEFAULT_ASH_INTERNAL_GLOB       # Y is bigger, but because of uclibc glob() bug, let Y be default for now
 105         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 106         help
 107         Do not use glob() function from libc, use internal implementation.
 108         Use this if you are getting "glob.h: No such file or directory"
 109         or similar build errors.
 110         Note that as of now (2017-01), uclibc and musl glob() both have bugs
 111         which would break ash if you select N here.
 112
 113 config BUSYBOX_CONFIG_ASH_BASH_COMPAT
 114         bool "bash-compatible extensions"
 115         default BUSYBOX_DEFAULT_ASH_BASH_COMPAT
 116         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 117
 118 config BUSYBOX_CONFIG_ASH_JOB_CONTROL
 119         bool "Job control"
 120         default BUSYBOX_DEFAULT_ASH_JOB_CONTROL
 121         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 122
 123 config BUSYBOX_CONFIG_ASH_ALIAS
 124         bool "Alias support"
 125         default BUSYBOX_DEFAULT_ASH_ALIAS
 126         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 127
 128 config BUSYBOX_CONFIG_ASH_RANDOM_SUPPORT
 129         bool "Pseudorandom generator and $RANDOM variable"
 130         default BUSYBOX_DEFAULT_ASH_RANDOM_SUPPORT
 131         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 132         help
 133         Enable pseudorandom generator and dynamic variable "$RANDOM".
 134         Each read of "$RANDOM" will generate a new pseudorandom value.
 135         You can reset the generator by using a specified start value.
 136         After "unset RANDOM" the generator will switch off and this
 137         variable will no longer have special treatment.
 138
 139 config BUSYBOX_CONFIG_ASH_EXPAND_PRMT
 140         bool "Expand prompt string"
 141         default BUSYBOX_DEFAULT_ASH_EXPAND_PRMT
 142         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 143         help
 144         $PS# may contain volatile content, such as backquote commands.
 145         This option recreates the prompt string from the environment
 146         variable each time it is displayed.
 147
 148 config BUSYBOX_CONFIG_ASH_IDLE_TIMEOUT
 149         bool "Idle timeout variable $TMOUT"
 150         default BUSYBOX_DEFAULT_ASH_IDLE_TIMEOUT
 151         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 152         help
 153         Enable bash-like auto-logout after $TMOUT seconds of idle time.
 154
 155 config BUSYBOX_CONFIG_ASH_MAIL
 156         bool "Check for new mail in interactive shell"
 157         default BUSYBOX_DEFAULT_ASH_MAIL
 158         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 159         help
 160         Enable "check for new mail" function:
 161         if set, $MAIL file and $MAILPATH list of files
 162         are checked for mtime changes, and "you have mail"
 163         message is printed if change is detected.
 164
 165 config BUSYBOX_CONFIG_ASH_ECHO
 166         bool "echo builtin"
 167         default BUSYBOX_DEFAULT_ASH_ECHO
 168         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 169
 170 config BUSYBOX_CONFIG_ASH_PRINTF
 171         bool "printf builtin"
 172         default BUSYBOX_DEFAULT_ASH_PRINTF
 173         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 174
 175 config BUSYBOX_CONFIG_ASH_TEST
 176         bool "test builtin"
 177         default BUSYBOX_DEFAULT_ASH_TEST
 178         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 179
 180 config BUSYBOX_CONFIG_ASH_HELP
 181         bool "help builtin"
 182         default BUSYBOX_DEFAULT_ASH_HELP
 183         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 184
 185 config BUSYBOX_CONFIG_ASH_GETOPTS
 186         bool "getopts builtin"
 187         default BUSYBOX_DEFAULT_ASH_GETOPTS
 188         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 189
 190 config BUSYBOX_CONFIG_ASH_CMDCMD
 191         bool "command builtin"
 192         default BUSYBOX_DEFAULT_ASH_CMDCMD
 193         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH
 194         help
 195         Enable support for the 'command' builtin, which allows
 196         you to run the specified command or builtin,
 197         even when there is a function with the same name.
 198
 199 endif # ash options
 200 config BUSYBOX_CONFIG_CTTYHACK
 201         bool "cttyhack"
 202         default BUSYBOX_DEFAULT_CTTYHACK
 203         help
 204         One common problem reported on the mailing list is the "can't
 205         access tty; job control turned off" error message, which typically
 206         appears when one tries to use a shell with stdin/stdout on
 207         /dev/console.
 208         This device is special - it cannot be a controlling tty.
 209
 210         The proper solution is to use the correct device instead of
 211         /dev/console.
 212
 213         cttyhack provides a "quick and dirty" solution to this problem.
 214         It analyzes stdin with various ioctls, trying to determine whether
 215         it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line).
 216         On Linux it also checks sysfs for a pointer to the active console.
 217         If cttyhack is able to find the real console device, it closes
 218         stdin/out/err and reopens that device.
 219         Then it executes the given program. Opening the device will make
 220         that device a controlling tty. This may require cttyhack
 221         to be a session leader.
 222
 223         Example for /etc/inittab (for busybox init):
 224
 225         ::respawn:/bin/cttyhack /bin/sh
 226
 227         Starting an interactive shell from boot shell script:
 228
 229         setsid cttyhack sh
 230
 231         Giving controlling tty to shell running with PID 1:
 232
 233         # exec cttyhack sh
 234
 235         Without cttyhack, you need to know exact tty name,
 236         and do something like this:
 237
 238         # exec setsid sh -c 'exec sh </dev/tty1 >/dev/tty1 2>&1'
 239
 240         Starting getty on a controlling tty from a shell script:
 241
 242         # getty 115200 $(cttyhack)
 243 config BUSYBOX_CONFIG_HUSH
 244         bool "hush"
 245         default BUSYBOX_DEFAULT_HUSH
 246         help
 247         hush is a small shell (25k). It handles the normal flow control
 248         constructs such as if/then/elif/else/fi, for/in/do/done, while loops,
 249         case/esac. Redirections, here documents, $((arithmetic))
 250         and functions are supported.
 251
 252         It will compile and work on no-mmu systems.
 253
 254         It does not handle select, aliases, tilde expansion,
 255         &>file and >&file redirection of stdout+stderr.
 256
 257 config BUSYBOX_CONFIG_HUSH_BASH_COMPAT
 258         bool "bash-compatible extensions"
 259         default BUSYBOX_DEFAULT_HUSH_BASH_COMPAT
 260         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 261
 262 config BUSYBOX_CONFIG_HUSH_BRACE_EXPANSION
 263         bool "Brace expansion"
 264         default BUSYBOX_DEFAULT_HUSH_BRACE_EXPANSION
 265         depends on BUSYBOX_CONFIG_HUSH_BASH_COMPAT
 266         help
 267         Enable {abc,def} extension.
 268
 269 config BUSYBOX_CONFIG_HUSH_INTERACTIVE
 270         bool "Interactive mode"
 271         default BUSYBOX_DEFAULT_HUSH_INTERACTIVE
 272         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 273         help
 274         Enable interactive mode (prompt and command editing).
 275         Without this, hush simply reads and executes commands
 276         from stdin just like a shell script from a file.
 277         No prompt, no PS1/PS2 magic shell variables.
 278
 279 config BUSYBOX_CONFIG_HUSH_SAVEHISTORY
 280         bool "Save command history to .hush_history"
 281         default BUSYBOX_DEFAULT_HUSH_SAVEHISTORY
 282         depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE && BUSYBOX_CONFIG_FEATURE_EDITING_SAVEHISTORY
 283
 284 config BUSYBOX_CONFIG_HUSH_JOB
 285         bool "Job control"
 286         default BUSYBOX_DEFAULT_HUSH_JOB
 287         depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE
 288         help
 289         Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current
 290         command (not entire shell), fg/bg builtins work. Without this option,
 291         "cmd &" still works by simply spawning a process and immediately
 292         prompting for next command (or executing next command in a script),
 293         but no separate process group is formed.
 294
 295 config BUSYBOX_CONFIG_HUSH_TICK
 296         bool "Support process substitution"
 297         default BUSYBOX_DEFAULT_HUSH_TICK
 298         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 299         help
 300         Enable `command` and $(command).
 301
 302 config BUSYBOX_CONFIG_HUSH_IF
 303         bool "Support if/then/elif/else/fi"
 304         default BUSYBOX_DEFAULT_HUSH_IF
 305         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 306
 307 config BUSYBOX_CONFIG_HUSH_LOOPS
 308         bool "Support for, while and until loops"
 309         default BUSYBOX_DEFAULT_HUSH_LOOPS
 310         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 311
 312 config BUSYBOX_CONFIG_HUSH_CASE
 313         bool "Support case ... esac statement"
 314         default BUSYBOX_DEFAULT_HUSH_CASE
 315         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 316         help
 317         Enable case ... esac statement. +400 bytes.
 318
 319 config BUSYBOX_CONFIG_HUSH_FUNCTIONS
 320         bool "Support funcname() { commands; } syntax"
 321         default BUSYBOX_DEFAULT_HUSH_FUNCTIONS
 322         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 323         help
 324         Enable support for shell functions. +800 bytes.
 325
 326 config BUSYBOX_CONFIG_HUSH_LOCAL
 327         bool "local builtin"
 328         default BUSYBOX_DEFAULT_HUSH_LOCAL
 329         depends on BUSYBOX_CONFIG_HUSH_FUNCTIONS
 330         help
 331         Enable support for local variables in functions.
 332
 333 config BUSYBOX_CONFIG_HUSH_RANDOM_SUPPORT
 334         bool "Pseudorandom generator and $RANDOM variable"
 335         default BUSYBOX_DEFAULT_HUSH_RANDOM_SUPPORT
 336         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 337         help
 338         Enable pseudorandom generator and dynamic variable "$RANDOM".
 339         Each read of "$RANDOM" will generate a new pseudorandom value.
 340
 341 config BUSYBOX_CONFIG_HUSH_MODE_X
 342         bool "Support 'hush -x' option and 'set -x' command"
 343         default BUSYBOX_DEFAULT_HUSH_MODE_X
 344         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 345         help
 346         This instructs hush to print commands before execution.
 347         Adds ~300 bytes.
 348
 349 config BUSYBOX_CONFIG_HUSH_ECHO
 350         bool "echo builtin"
 351         default BUSYBOX_DEFAULT_HUSH_ECHO
 352         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 353
 354 config BUSYBOX_CONFIG_HUSH_PRINTF
 355         bool "printf builtin"
 356         default BUSYBOX_DEFAULT_HUSH_PRINTF
 357         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 358
 359 config BUSYBOX_CONFIG_HUSH_TEST
 360         bool "test builtin"
 361         default BUSYBOX_DEFAULT_HUSH_TEST
 362         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 363
 364 config BUSYBOX_CONFIG_HUSH_HELP
 365         bool "help builtin"
 366         default BUSYBOX_DEFAULT_HUSH_HELP
 367         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 368
 369 config BUSYBOX_CONFIG_HUSH_EXPORT
 370         bool "export builtin"
 371         default BUSYBOX_DEFAULT_HUSH_EXPORT
 372         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 373
 374 config BUSYBOX_CONFIG_HUSH_EXPORT_N
 375         bool "Support 'export -n' option"
 376         default BUSYBOX_DEFAULT_HUSH_EXPORT_N
 377         depends on BUSYBOX_CONFIG_HUSH_EXPORT
 378         help
 379         export -n unexports variables. It is a bash extension.
 380
 381 config BUSYBOX_CONFIG_HUSH_KILL
 382         bool "kill builtin (supports kill %jobspec)"
 383         default BUSYBOX_DEFAULT_HUSH_KILL
 384         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 385
 386 config BUSYBOX_CONFIG_HUSH_WAIT
 387         bool "wait builtin"
 388         default BUSYBOX_DEFAULT_HUSH_WAIT
 389         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 390
 391 config BUSYBOX_CONFIG_HUSH_TRAP
 392         bool "trap builtin"
 393         default BUSYBOX_DEFAULT_HUSH_TRAP
 394         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 395
 396 config BUSYBOX_CONFIG_HUSH_TYPE
 397         bool "type builtin"
 398         default BUSYBOX_DEFAULT_HUSH_TYPE
 399         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 400
 401 config BUSYBOX_CONFIG_HUSH_READ
 402         bool "read builtin"
 403         default BUSYBOX_DEFAULT_HUSH_READ
 404         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 405
 406 config BUSYBOX_CONFIG_HUSH_SET
 407         bool "set builtin"
 408         default BUSYBOX_DEFAULT_HUSH_SET
 409         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 410
 411 config BUSYBOX_CONFIG_HUSH_UNSET
 412         bool "unset builtin"
 413         default BUSYBOX_DEFAULT_HUSH_UNSET
 414         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 415
 416 config BUSYBOX_CONFIG_HUSH_ULIMIT
 417         bool "ulimit builtin"
 418         default BUSYBOX_DEFAULT_HUSH_ULIMIT
 419         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 420
 421 config BUSYBOX_CONFIG_HUSH_UMASK
 422         bool "umask builtin"
 423         default BUSYBOX_DEFAULT_HUSH_UMASK
 424         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 425
 426 config BUSYBOX_CONFIG_HUSH_MEMLEAK
 427         bool "memleak builtin (debugging)"
 428         default BUSYBOX_DEFAULT_HUSH_MEMLEAK
 429         depends on BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 430
 431 config BUSYBOX_CONFIG_MSH
 432         bool "msh (deprecated: aliased to hush)"
 433         default BUSYBOX_DEFAULT_MSH
 434         select BUSYBOX_CONFIG_HUSH
 435         help
 436         msh is deprecated and will be removed, please migrate to hush.
 437
 438
 439 comment "Options common to all shells"
 440 if ASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 441
 442 config BUSYBOX_CONFIG_FEATURE_SH_MATH
 443         bool "POSIX math support"
 444         default BUSYBOX_DEFAULT_FEATURE_SH_MATH
 445         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 446         help
 447         Enable math support in the shell via $((...)) syntax.
 448
 449 config BUSYBOX_CONFIG_FEATURE_SH_MATH_64
 450         bool "Extend POSIX math support to 64 bit"
 451         default BUSYBOX_DEFAULT_FEATURE_SH_MATH_64
 452         depends on BUSYBOX_CONFIG_FEATURE_SH_MATH
 453         help
 454         Enable 64-bit math support in the shell. This will make the shell
 455         slightly larger, but will allow computation with very large numbers.
 456         This is not in POSIX, so do not rely on this in portable code.
 457
 458 config BUSYBOX_CONFIG_FEATURE_SH_EXTRA_QUIET
 459         bool "Hide message on interactive shell startup"
 460         default BUSYBOX_DEFAULT_FEATURE_SH_EXTRA_QUIET
 461         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 462         help
 463         Remove the busybox introduction when starting a shell.
 464
 465 config BUSYBOX_CONFIG_FEATURE_SH_STANDALONE
 466         bool "Standalone shell"
 467         default BUSYBOX_DEFAULT_FEATURE_SH_STANDALONE
 468         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 469         help
 470         This option causes busybox shells to use busybox applets
 471         in preference to executables in the PATH whenever possible. For
 472         example, entering the command 'ifconfig' into the shell would cause
 473         busybox to use the ifconfig busybox applet. Specifying the fully
 474         qualified executable name, such as '/sbin/ifconfig' will still
 475         execute the /sbin/ifconfig executable on the filesystem. This option
 476         is generally used when creating a statically linked version of busybox
 477         for use as a rescue shell, in the event that you screw up your system.
 478
 479         This is implemented by re-execing /proc/self/exe (typically)
 480         with right parameters.
 481
 482         However, there are drawbacks: it is problematic in chroot jails
 483         without mounted /proc, and ps/top may show command name as 'exe'
 484         for applets started this way.
 485
 486 config BUSYBOX_CONFIG_FEATURE_SH_NOFORK
 487         bool "Run 'nofork' applets directly"
 488         default BUSYBOX_DEFAULT_FEATURE_SH_NOFORK
 489         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 490         help
 491         This option causes busybox shells to not execute typical
 492         fork/exec/wait sequence, but call <applet>_main directly,
 493         if possible. (Sometimes it is not possible: for example,
 494         this is not possible in pipes).
 495
 496         This will be done only for some applets (those which are marked
 497         NOFORK in include/applets.h).
 498
 499         This may significantly speed up some shell scripts.
 500
 501         This feature is relatively new. Use with care. Report bugs
 502         to project mailing list.
 503
 504 config BUSYBOX_CONFIG_FEATURE_SH_HISTFILESIZE
 505         bool "Use $HISTFILESIZE"
 506         default BUSYBOX_DEFAULT_FEATURE_SH_HISTFILESIZE
 507         depends on BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 508         help
 509         This option makes busybox shells to use $HISTFILESIZE variable
 510         to set shell history size. Note that its max value is capped
 511         by "History size" setting in library tuning section.
 512
 513 endif # Options common to all shells
 514
 515 endmenu