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 docs/Kconfig-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         select BUSYBOX_CONFIG_SHELL_ASH
  22         help
  23         Choose ash to be the shell executed by 'sh' name.
  24         The ash code will be built into busybox. If you don't select
  25         "ash" choice (CONFIG_ASH), this shell may only be invoked by
  26         the name 'sh' (and not 'ash').
  27
  28 config BUSYBOX_CONFIG_SH_IS_HUSH
  29         bool "hush"
  30         select BUSYBOX_CONFIG_SHELL_HUSH
  31         help
  32         Choose hush to be the shell executed by 'sh' name.
  33         The hush code will be built into busybox. If you don't select
  34         "hush" choice (CONFIG_HUSH), this shell may only be invoked by
  35         the name 'sh' (and not 'hush').
  36
  37 config BUSYBOX_CONFIG_SH_IS_NONE
  38         bool "none"
  39
  40 endchoice
  41
  42 choice
  43         prompt "Choose which shell is aliased to 'bash' name"
  44         default BUSYBOX_CONFIG_BASH_IS_NONE
  45         help
  46         Choose which shell you want to be executed by 'bash' alias.
  47         The ash shell is the most bash compatible and full featured one,
  48         although compatibility is far from being complete.
  49
  50         Note that selecting this option does not switch on any bash
  51         compatibility code. It merely makes it possible to install
  52         /bin/bash (sym)link and run scripts which start with
  53         #!/bin/bash line.
  54
  55         Many systems use it in scripts which use bash-specific features,
  56         even simple ones like $RANDOM. Without this option, busybox
  57         can't be used for running them because it won't recongnize
  58         "bash" as a supported applet name.
  59
  60 config BUSYBOX_CONFIG_BASH_IS_ASH
  61         depends on !BUSYBOX_CONFIG_NOMMU
  62         bool "ash"
  63         select BUSYBOX_CONFIG_SHELL_ASH
  64         help
  65         Choose ash to be the shell executed by 'bash' name.
  66         The ash code will be built into busybox. If you don't select
  67         "ash" choice (CONFIG_ASH), this shell may only be invoked by
  68         the name 'bash' (and not 'ash').
  69
  70 config BUSYBOX_CONFIG_BASH_IS_HUSH
  71         bool "hush"
  72         select BUSYBOX_CONFIG_SHELL_HUSH
  73         help
  74         Choose hush to be the shell executed by 'bash' name.
  75         The hush code will be built into busybox. If you don't select
  76         "hush" choice (CONFIG_HUSH), this shell may only be invoked by
  77         the name 'bash' (and not 'hush').
  78
  79 config BUSYBOX_CONFIG_BASH_IS_NONE
  80         bool "none"
  81
  82 endchoice
  83
  84
  85 config BUSYBOX_CONFIG_SHELL_ASH
  86         bool #hidden option
  87         depends on !BUSYBOX_CONFIG_NOMMU
  88
  89 config BUSYBOX_CONFIG_ASH
  90         bool "ash (78 kb)"
  91         default BUSYBOX_DEFAULT_ASH
  92         depends on !BUSYBOX_CONFIG_NOMMU
  93         select BUSYBOX_CONFIG_SHELL_ASH
  94         help
  95         The most complete and most pedantically correct shell included with
  96         busybox. This shell is actually a derivative of the Debian 'dash'
  97         shell (by Herbert Xu), which was created by porting the 'ash' shell
  98         (written by Kenneth Almquist) from NetBSD.
  99
 100 # ash options
 101 # note: Don't remove !NOMMU part in the next line; it would break
 102 # menuconfig's indenting.
 103 if !NOMMU && (BUSYBOX_CONFIG_SHELL_ASH || BUSYBOX_CONFIG_ASH || BUSYBOX_CONFIG_SH_IS_ASH || BUSYBOX_CONFIG_BASH_IS_ASH)
 104
 105 config BUSYBOX_CONFIG_ASH_OPTIMIZE_FOR_SIZE
 106         bool "Optimize for size instead of speed"
 107         default BUSYBOX_DEFAULT_ASH_OPTIMIZE_FOR_SIZE
 108         depends on BUSYBOX_CONFIG_SHELL_ASH
 109
 110 config BUSYBOX_CONFIG_ASH_INTERNAL_GLOB
 111         bool "Use internal glob() implementation"
 112         default BUSYBOX_DEFAULT_ASH_INTERNAL_GLOB       # Y is bigger, but because of uclibc glob() bug, let Y be default for now
 113         depends on BUSYBOX_CONFIG_SHELL_ASH
 114         help
 115         Do not use glob() function from libc, use internal implementation.
 116         Use this if you are getting "glob.h: No such file or directory"
 117         or similar build errors.
 118         Note that as of now (2017-01), uclibc and musl glob() both have bugs
 119         which would break ash if you select N here.
 120
 121 config BUSYBOX_CONFIG_ASH_BASH_COMPAT
 122         bool "bash-compatible extensions"
 123         default BUSYBOX_DEFAULT_ASH_BASH_COMPAT
 124         depends on BUSYBOX_CONFIG_SHELL_ASH
 125
 126 config BUSYBOX_CONFIG_ASH_BASH_SOURCE_CURDIR
 127         bool "'source' and '.' builtins search current directory after $PATH"
 128         default BUSYBOX_DEFAULT_ASH_BASH_SOURCE_CURDIR   # do not encourage non-standard behavior
 129         depends on BUSYBOX_CONFIG_ASH_BASH_COMPAT
 130         help
 131         This is not compliant with standards. Avoid if possible.
 132
 133 config BUSYBOX_CONFIG_ASH_BASH_NOT_FOUND_HOOK
 134         bool "command_not_found_handle hook support"
 135         default BUSYBOX_DEFAULT_ASH_BASH_NOT_FOUND_HOOK
 136         depends on BUSYBOX_CONFIG_ASH_BASH_COMPAT
 137         help
 138         Enable support for the 'command_not_found_handle' hook function,
 139         from GNU bash, which allows for alternative command not found
 140         handling.
 141
 142 config BUSYBOX_CONFIG_ASH_JOB_CONTROL
 143         bool "Job control"
 144         default BUSYBOX_DEFAULT_ASH_JOB_CONTROL
 145         depends on BUSYBOX_CONFIG_SHELL_ASH
 146
 147 config BUSYBOX_CONFIG_ASH_ALIAS
 148         bool "Alias support"
 149         default BUSYBOX_DEFAULT_ASH_ALIAS
 150         depends on BUSYBOX_CONFIG_SHELL_ASH
 151
 152 config BUSYBOX_CONFIG_ASH_RANDOM_SUPPORT
 153         bool "Pseudorandom generator and $RANDOM variable"
 154         default BUSYBOX_DEFAULT_ASH_RANDOM_SUPPORT
 155         depends on BUSYBOX_CONFIG_SHELL_ASH
 156         help
 157         Enable pseudorandom generator and dynamic variable "$RANDOM".
 158         Each read of "$RANDOM" will generate a new pseudorandom value.
 159         You can reset the generator by using a specified start value.
 160         After "unset RANDOM" the generator will switch off and this
 161         variable will no longer have special treatment.
 162
 163 config BUSYBOX_CONFIG_ASH_EXPAND_PRMT
 164         bool "Expand prompt string"
 165         default BUSYBOX_DEFAULT_ASH_EXPAND_PRMT
 166         depends on BUSYBOX_CONFIG_SHELL_ASH
 167         help
 168         $PS# may contain volatile content, such as backquote commands.
 169         This option recreates the prompt string from the environment
 170         variable each time it is displayed.
 171
 172 config BUSYBOX_CONFIG_ASH_IDLE_TIMEOUT
 173         bool "Idle timeout variable $TMOUT"
 174         default BUSYBOX_DEFAULT_ASH_IDLE_TIMEOUT
 175         depends on BUSYBOX_CONFIG_SHELL_ASH
 176         help
 177         Enable bash-like auto-logout after $TMOUT seconds of idle time.
 178
 179 config BUSYBOX_CONFIG_ASH_MAIL
 180         bool "Check for new mail in interactive shell"
 181         default BUSYBOX_DEFAULT_ASH_MAIL
 182         depends on BUSYBOX_CONFIG_SHELL_ASH
 183         help
 184         Enable "check for new mail" function:
 185         if set, $MAIL file and $MAILPATH list of files
 186         are checked for mtime changes, and "you have mail"
 187         message is printed if change is detected.
 188
 189 config BUSYBOX_CONFIG_ASH_ECHO
 190         bool "echo builtin"
 191         default BUSYBOX_DEFAULT_ASH_ECHO
 192         depends on BUSYBOX_CONFIG_SHELL_ASH
 193
 194 config BUSYBOX_CONFIG_ASH_PRINTF
 195         bool "printf builtin"
 196         default BUSYBOX_DEFAULT_ASH_PRINTF
 197         depends on BUSYBOX_CONFIG_SHELL_ASH
 198
 199 config BUSYBOX_CONFIG_ASH_TEST
 200         bool "test builtin"
 201         default BUSYBOX_DEFAULT_ASH_TEST
 202         depends on BUSYBOX_CONFIG_SHELL_ASH
 203
 204 config BUSYBOX_CONFIG_ASH_HELP
 205         bool "help builtin"
 206         default BUSYBOX_DEFAULT_ASH_HELP
 207         depends on BUSYBOX_CONFIG_SHELL_ASH
 208
 209 config BUSYBOX_CONFIG_ASH_GETOPTS
 210         bool "getopts builtin"
 211         default BUSYBOX_DEFAULT_ASH_GETOPTS
 212         depends on BUSYBOX_CONFIG_SHELL_ASH
 213
 214 config BUSYBOX_CONFIG_ASH_CMDCMD
 215         bool "command builtin"
 216         default BUSYBOX_DEFAULT_ASH_CMDCMD
 217         depends on BUSYBOX_CONFIG_SHELL_ASH
 218         help
 219         Enable support for the 'command' builtin, which allows
 220         you to run the specified command or builtin,
 221         even when there is a function with the same name.
 222
 223 endif # ash options
 224 config BUSYBOX_CONFIG_CTTYHACK
 225         bool "cttyhack (2.4 kb)"
 226         default BUSYBOX_DEFAULT_CTTYHACK
 227         help
 228         One common problem reported on the mailing list is the "can't
 229         access tty; job control turned off" error message, which typically
 230         appears when one tries to use a shell with stdin/stdout on
 231         /dev/console.
 232         This device is special - it cannot be a controlling tty.
 233
 234         The proper solution is to use the correct device instead of
 235         /dev/console.
 236
 237         cttyhack provides a "quick and dirty" solution to this problem.
 238         It analyzes stdin with various ioctls, trying to determine whether
 239         it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line).
 240         On Linux it also checks sysfs for a pointer to the active console.
 241         If cttyhack is able to find the real console device, it closes
 242         stdin/out/err and reopens that device.
 243         Then it executes the given program. Opening the device will make
 244         that device a controlling tty. This may require cttyhack
 245         to be a session leader.
 246
 247         Example for /etc/inittab (for busybox init):
 248
 249         ::respawn:/bin/cttyhack /bin/sh
 250
 251         Starting an interactive shell from boot shell script:
 252
 253         setsid cttyhack sh
 254
 255         Giving controlling tty to shell running with PID 1:
 256
 257         # exec cttyhack sh
 258
 259         Without cttyhack, you need to know exact tty name,
 260         and do something like this:
 261
 262         # exec setsid sh -c 'exec sh </dev/tty1 >/dev/tty1 2>&1'
 263
 264         Starting getty on a controlling tty from a shell script:
 265
 266         # getty 115200 $(cttyhack)
 267 config BUSYBOX_CONFIG_HUSH
 268         bool "hush (68 kb)"
 269         default BUSYBOX_DEFAULT_HUSH
 270         select BUSYBOX_CONFIG_SHELL_HUSH
 271         help
 272         hush is a small shell. It handles the normal flow control
 273         constructs such as if/then/elif/else/fi, for/in/do/done, while loops,
 274         case/esac. Redirections, here documents, $((arithmetic))
 275         and functions are supported.
 276
 277         It will compile and work on no-mmu systems.
 278
 279         It does not handle select, aliases, tilde expansion,
 280         &>file and >&file redirection of stdout+stderr.
 281
 282 config BUSYBOX_CONFIG_SHELL_HUSH
 283         bool "Internal shell for embedded script support"
 284         default BUSYBOX_DEFAULT_SHELL_HUSH
 285
 286 # hush options
 287 # It's only needed to get "nice" menuconfig indenting.
 288 if SHELL_HUSH || BUSYBOX_CONFIG_HUSH || BUSYBOX_CONFIG_SH_IS_HUSH || BUSYBOX_CONFIG_BASH_IS_HUSH
 289
 290 config BUSYBOX_CONFIG_HUSH_BASH_COMPAT
 291         bool "bash-compatible extensions"
 292         default BUSYBOX_DEFAULT_HUSH_BASH_COMPAT
 293         depends on BUSYBOX_CONFIG_SHELL_HUSH
 294
 295 config BUSYBOX_CONFIG_HUSH_BRACE_EXPANSION
 296         bool "Brace expansion"
 297         default BUSYBOX_DEFAULT_HUSH_BRACE_EXPANSION
 298         depends on BUSYBOX_CONFIG_HUSH_BASH_COMPAT
 299         help
 300         Enable {abc,def} extension.
 301
 302 config BUSYBOX_CONFIG_HUSH_LINENO_VAR
 303         bool "$LINENO variable"
 304         default BUSYBOX_DEFAULT_HUSH_LINENO_VAR
 305         depends on BUSYBOX_CONFIG_HUSH_BASH_COMPAT
 306
 307 config BUSYBOX_CONFIG_HUSH_BASH_SOURCE_CURDIR
 308         bool "'source' and '.' builtins search current directory after $PATH"
 309         default BUSYBOX_DEFAULT_HUSH_BASH_SOURCE_CURDIR   # do not encourage non-standard behavior
 310         depends on BUSYBOX_CONFIG_HUSH_BASH_COMPAT
 311         help
 312         This is not compliant with standards. Avoid if possible.
 313
 314 config BUSYBOX_CONFIG_HUSH_INTERACTIVE
 315         bool "Interactive mode"
 316         default BUSYBOX_DEFAULT_HUSH_INTERACTIVE
 317         depends on BUSYBOX_CONFIG_SHELL_HUSH
 318         help
 319         Enable interactive mode (prompt and command editing).
 320         Without this, hush simply reads and executes commands
 321         from stdin just like a shell script from a file.
 322         No prompt, no PS1/PS2 magic shell variables.
 323
 324 config BUSYBOX_CONFIG_HUSH_SAVEHISTORY
 325         bool "Save command history to .hush_history"
 326         default BUSYBOX_DEFAULT_HUSH_SAVEHISTORY
 327         depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE && BUSYBOX_CONFIG_FEATURE_EDITING_SAVEHISTORY
 328
 329 config BUSYBOX_CONFIG_HUSH_JOB
 330         bool "Job control"
 331         default BUSYBOX_DEFAULT_HUSH_JOB
 332         depends on BUSYBOX_CONFIG_HUSH_INTERACTIVE
 333         help
 334         Enable job control: Ctrl-Z backgrounds, Ctrl-C interrupts current
 335         command (not entire shell), fg/bg builtins work. Without this option,
 336         "cmd &" still works by simply spawning a process and immediately
 337         prompting for next command (or executing next command in a script),
 338         but no separate process group is formed.
 339
 340 config BUSYBOX_CONFIG_HUSH_TICK
 341         bool "Support command substitution"
 342         default BUSYBOX_DEFAULT_HUSH_TICK
 343         depends on BUSYBOX_CONFIG_SHELL_HUSH
 344         help
 345         Enable `command` and $(command).
 346
 347 config BUSYBOX_CONFIG_HUSH_IF
 348         bool "Support if/then/elif/else/fi"
 349         default BUSYBOX_DEFAULT_HUSH_IF
 350         depends on BUSYBOX_CONFIG_SHELL_HUSH
 351
 352 config BUSYBOX_CONFIG_HUSH_LOOPS
 353         bool "Support for, while and until loops"
 354         default BUSYBOX_DEFAULT_HUSH_LOOPS
 355         depends on BUSYBOX_CONFIG_SHELL_HUSH
 356
 357 config BUSYBOX_CONFIG_HUSH_CASE
 358         bool "Support case ... esac statement"
 359         default BUSYBOX_DEFAULT_HUSH_CASE
 360         depends on BUSYBOX_CONFIG_SHELL_HUSH
 361         help
 362         Enable case ... esac statement. +400 bytes.
 363
 364 config BUSYBOX_CONFIG_HUSH_FUNCTIONS
 365         bool "Support funcname() { commands; } syntax"
 366         default BUSYBOX_DEFAULT_HUSH_FUNCTIONS
 367         depends on BUSYBOX_CONFIG_SHELL_HUSH
 368         help
 369         Enable support for shell functions. +800 bytes.
 370
 371 config BUSYBOX_CONFIG_HUSH_LOCAL
 372         bool "local builtin"
 373         default BUSYBOX_DEFAULT_HUSH_LOCAL
 374         depends on BUSYBOX_CONFIG_HUSH_FUNCTIONS
 375         help
 376         Enable support for local variables in functions.
 377
 378 config BUSYBOX_CONFIG_HUSH_RANDOM_SUPPORT
 379         bool "Pseudorandom generator and $RANDOM variable"
 380         default BUSYBOX_DEFAULT_HUSH_RANDOM_SUPPORT
 381         depends on BUSYBOX_CONFIG_SHELL_HUSH
 382         help
 383         Enable pseudorandom generator and dynamic variable "$RANDOM".
 384         Each read of "$RANDOM" will generate a new pseudorandom value.
 385
 386 config BUSYBOX_CONFIG_HUSH_MODE_X
 387         bool "Support 'hush -x' option and 'set -x' command"
 388         default BUSYBOX_DEFAULT_HUSH_MODE_X
 389         depends on BUSYBOX_CONFIG_SHELL_HUSH
 390         help
 391         This instructs hush to print commands before execution.
 392         Adds ~300 bytes.
 393
 394 config BUSYBOX_CONFIG_HUSH_ECHO
 395         bool "echo builtin"
 396         default BUSYBOX_DEFAULT_HUSH_ECHO
 397         depends on BUSYBOX_CONFIG_SHELL_HUSH
 398
 399 config BUSYBOX_CONFIG_HUSH_PRINTF
 400         bool "printf builtin"
 401         default BUSYBOX_DEFAULT_HUSH_PRINTF
 402         depends on BUSYBOX_CONFIG_SHELL_HUSH
 403
 404 config BUSYBOX_CONFIG_HUSH_TEST
 405         bool "test builtin"
 406         default BUSYBOX_DEFAULT_HUSH_TEST
 407         depends on BUSYBOX_CONFIG_SHELL_HUSH
 408
 409 config BUSYBOX_CONFIG_HUSH_HELP
 410         bool "help builtin"
 411         default BUSYBOX_DEFAULT_HUSH_HELP
 412         depends on BUSYBOX_CONFIG_SHELL_HUSH
 413
 414 config BUSYBOX_CONFIG_HUSH_EXPORT
 415         bool "export builtin"
 416         default BUSYBOX_DEFAULT_HUSH_EXPORT
 417         depends on BUSYBOX_CONFIG_SHELL_HUSH
 418
 419 config BUSYBOX_CONFIG_HUSH_EXPORT_N
 420         bool "Support 'export -n' option"
 421         default BUSYBOX_DEFAULT_HUSH_EXPORT_N
 422         depends on BUSYBOX_CONFIG_HUSH_EXPORT
 423         help
 424         export -n unexports variables. It is a bash extension.
 425
 426 config BUSYBOX_CONFIG_HUSH_READONLY
 427         bool "readonly builtin"
 428         default BUSYBOX_DEFAULT_HUSH_READONLY
 429         depends on BUSYBOX_CONFIG_SHELL_HUSH
 430         help
 431         Enable support for read-only variables.
 432
 433 config BUSYBOX_CONFIG_HUSH_KILL
 434         bool "kill builtin (supports kill %jobspec)"
 435         default BUSYBOX_DEFAULT_HUSH_KILL
 436         depends on BUSYBOX_CONFIG_SHELL_HUSH
 437
 438 config BUSYBOX_CONFIG_HUSH_WAIT
 439         bool "wait builtin"
 440         default BUSYBOX_DEFAULT_HUSH_WAIT
 441         depends on BUSYBOX_CONFIG_SHELL_HUSH
 442
 443 config BUSYBOX_CONFIG_HUSH_COMMAND
 444         bool "command builtin"
 445         default BUSYBOX_DEFAULT_HUSH_COMMAND
 446         depends on BUSYBOX_CONFIG_SHELL_HUSH
 447
 448 config BUSYBOX_CONFIG_HUSH_TRAP
 449         bool "trap builtin"
 450         default BUSYBOX_DEFAULT_HUSH_TRAP
 451         depends on BUSYBOX_CONFIG_SHELL_HUSH
 452
 453 config BUSYBOX_CONFIG_HUSH_TYPE
 454         bool "type builtin"
 455         default BUSYBOX_DEFAULT_HUSH_TYPE
 456         depends on BUSYBOX_CONFIG_SHELL_HUSH
 457
 458 config BUSYBOX_CONFIG_HUSH_TIMES
 459         bool "times builtin"
 460         default BUSYBOX_DEFAULT_HUSH_TIMES
 461         depends on BUSYBOX_CONFIG_SHELL_HUSH
 462
 463 config BUSYBOX_CONFIG_HUSH_READ
 464         bool "read builtin"
 465         default BUSYBOX_DEFAULT_HUSH_READ
 466         depends on BUSYBOX_CONFIG_SHELL_HUSH
 467
 468 config BUSYBOX_CONFIG_HUSH_SET
 469         bool "set builtin"
 470         default BUSYBOX_DEFAULT_HUSH_SET
 471         depends on BUSYBOX_CONFIG_SHELL_HUSH
 472
 473 config BUSYBOX_CONFIG_HUSH_UNSET
 474         bool "unset builtin"
 475         default BUSYBOX_DEFAULT_HUSH_UNSET
 476         depends on BUSYBOX_CONFIG_SHELL_HUSH
 477
 478 config BUSYBOX_CONFIG_HUSH_ULIMIT
 479         bool "ulimit builtin"
 480         default BUSYBOX_DEFAULT_HUSH_ULIMIT
 481         depends on BUSYBOX_CONFIG_SHELL_HUSH
 482
 483 config BUSYBOX_CONFIG_HUSH_UMASK
 484         bool "umask builtin"
 485         default BUSYBOX_DEFAULT_HUSH_UMASK
 486         depends on BUSYBOX_CONFIG_SHELL_HUSH
 487
 488 config BUSYBOX_CONFIG_HUSH_GETOPTS
 489         bool "getopts builtin"
 490         default BUSYBOX_DEFAULT_HUSH_GETOPTS
 491         depends on BUSYBOX_CONFIG_SHELL_HUSH
 492
 493 config BUSYBOX_CONFIG_HUSH_MEMLEAK
 494         bool "memleak builtin (debugging)"
 495         default BUSYBOX_DEFAULT_HUSH_MEMLEAK
 496         depends on BUSYBOX_CONFIG_SHELL_HUSH
 497
 498 endif # hush options
 499
 500
 501 comment "Options common to all shells"
 502 if BUSYBOX_CONFIG_SHELL_ASH || BUSYBOX_CONFIG_SHELL_HUSH
 503
 504 config BUSYBOX_CONFIG_FEATURE_SH_MATH
 505         bool "POSIX math support"
 506         default BUSYBOX_DEFAULT_FEATURE_SH_MATH
 507         depends on BUSYBOX_CONFIG_SHELL_ASH || BUSYBOX_CONFIG_SHELL_HUSH
 508         help
 509         Enable math support in the shell via $((...)) syntax.
 510
 511 config BUSYBOX_CONFIG_FEATURE_SH_MATH_64
 512         bool "Extend POSIX math support to 64 bit"
 513         default BUSYBOX_DEFAULT_FEATURE_SH_MATH_64
 514         depends on BUSYBOX_CONFIG_FEATURE_SH_MATH
 515         help
 516         Enable 64-bit math support in the shell. This will make the shell
 517         slightly larger, but will allow computation with very large numbers.
 518         This is not in POSIX, so do not rely on this in portable code.
 519
 520 config BUSYBOX_CONFIG_FEATURE_SH_MATH_BASE
 521         bool "Support BASE#nnnn literals"
 522         default BUSYBOX_DEFAULT_FEATURE_SH_MATH_BASE
 523         depends on BUSYBOX_CONFIG_FEATURE_SH_MATH
 524
 525 config BUSYBOX_CONFIG_FEATURE_SH_EXTRA_QUIET
 526         bool "Hide message on interactive shell startup"
 527         default BUSYBOX_DEFAULT_FEATURE_SH_EXTRA_QUIET
 528         depends on BUSYBOX_CONFIG_SHELL_ASH || BUSYBOX_CONFIG_SHELL_HUSH
 529         help
 530         Remove the busybox introduction when starting a shell.
 531
 532 config BUSYBOX_CONFIG_FEATURE_SH_STANDALONE
 533         bool "Standalone shell"
 534         default BUSYBOX_DEFAULT_FEATURE_SH_STANDALONE
 535         depends on BUSYBOX_CONFIG_SHELL_ASH || BUSYBOX_CONFIG_SHELL_HUSH
 536         help
 537         This option causes busybox shells to use busybox applets
 538         in preference to executables in the PATH whenever possible. For
 539         example, entering the command 'ifconfig' into the shell would cause
 540         busybox to use the ifconfig busybox applet. Specifying the fully
 541         qualified executable name, such as '/sbin/ifconfig' will still
 542         execute the /sbin/ifconfig executable on the filesystem. This option
 543         is generally used when creating a statically linked version of busybox
 544         for use as a rescue shell, in the event that you screw up your system.
 545
 546         This is implemented by re-execing /proc/self/exe (typically)
 547         with right parameters.
 548
 549         However, there are drawbacks: it is problematic in chroot jails
 550         without mounted /proc, and ps/top may show command name as 'exe'
 551         for applets started this way.
 552
 553 config BUSYBOX_CONFIG_FEATURE_SH_NOFORK
 554         bool "Run 'nofork' applets directly"
 555         default BUSYBOX_DEFAULT_FEATURE_SH_NOFORK
 556         depends on BUSYBOX_CONFIG_SHELL_ASH || BUSYBOX_CONFIG_SHELL_HUSH
 557         help
 558         This option causes busybox shells to not execute typical
 559         fork/exec/wait sequence, but call <applet>_main directly,
 560         if possible. (Sometimes it is not possible: for example,
 561         this is not possible in pipes).
 562
 563         This will be done only for some applets (those which are marked
 564         NOFORK in include/applets.h).
 565
 566         This may significantly speed up some shell scripts.
 567
 568         This feature is relatively new. Use with care. Report bugs
 569         to project mailing list.
 570
 571 config BUSYBOX_CONFIG_FEATURE_SH_READ_FRAC
 572         bool "read -t N.NNN support (+110 bytes)"
 573         default BUSYBOX_DEFAULT_FEATURE_SH_READ_FRAC
 574         depends on BUSYBOX_CONFIG_SHELL_ASH || BUSYBOX_CONFIG_SHELL_HUSH
 575         help
 576         Enable support for fractional second timeout in read builtin.
 577
 578 config BUSYBOX_CONFIG_FEATURE_SH_HISTFILESIZE
 579         bool "Use $HISTFILESIZE"
 580         default BUSYBOX_DEFAULT_FEATURE_SH_HISTFILESIZE
 581         depends on BUSYBOX_CONFIG_SHELL_ASH || BUSYBOX_CONFIG_SHELL_HUSH
 582         help
 583         This option makes busybox shells to use $HISTFILESIZE variable
 584         to set shell history size. Note that its max value is capped
 585         by "History size" setting in library tuning section.
 586
 587 config BUSYBOX_CONFIG_FEATURE_SH_EMBEDDED_SCRIPTS
 588         bool "Embed scripts in the binary"
 589         default BUSYBOX_DEFAULT_FEATURE_SH_EMBEDDED_SCRIPTS
 590         depends on BUSYBOX_CONFIG_SHELL_ASH || BUSYBOX_CONFIG_SHELL_HUSH
 591         help
 592         Allow scripts to be compressed and embedded in the busybox
 593         binary. The scripts should be placed in the 'embed' directory
 594         at build time. Like applets, scripts can be run as
 595         'busybox SCRIPT ...' or by linking their name to the binary.
 596
 597         This also allows applets to be implemented as scripts: place
 598         the script in 'applets_sh' and a stub C file containing
 599         configuration in the appropriate subsystem directory.
 600
 601 endif # Options common to all shells
 602
 603 endmenu