package/busybox/config/util-linux/Config.in

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see scripts/kbuild/config-language.txt.
   4 #
   5
   6 menu "Linux System Utilities"
   7
   8 config BUSYBOX_CONFIG_DMESG
   9         bool "dmesg"
  10         default y
  11         help
  12           dmesg is used to examine or control the kernel ring buffer.  When the
  13           Linux kernel prints messages to the system log, they are stored in
  14           the kernel ring buffer.  You can use dmesg to print the kernel's ring
  15           buffer, clear the kernel ring buffer, change the size of the kernel
  16           ring buffer, and change the priority level at which kernel messages
  17           are also logged to the system console.  Enable this option if you
  18           wish to enable the 'dmesg' utility.
  19
  20 config BUSYBOX_CONFIG_FBSET
  21         bool "fbset"
  22         default n
  23         help
  24           fbset is used to show or change the settings of a Linux frame buffer
  25           device.  The frame buffer device provides a simple and unique
  26           interface to access a graphics display.  Enable this option
  27           if you wish to enable the 'fbset' utility.
  28
  29 config BUSYBOX_CONFIG_FEATURE_FBSET_FANCY
  30         bool "Turn on extra fbset options"
  31         default n
  32         depends on BUSYBOX_CONFIG_FBSET
  33         help
  34           This option enables extended fbset options, allowing one to set the
  35           framebuffer size, color depth, etc.  interface to access a graphics
  36           display.  Enable this option if you wish to enable extended fbset
  37           options.
  38
  39 config BUSYBOX_CONFIG_FEATURE_FBSET_READMODE
  40         bool "Turn on fbset readmode support"
  41         default n
  42         depends on BUSYBOX_CONFIG_FBSET
  43         help
  44           This option allows fbset to read the video mode database stored by
  45           default n /etc/fb.modes, which can be used to set frame buffer
  46           device to pre-defined video modes.
  47
  48 config BUSYBOX_CONFIG_FDFLUSH
  49         bool "fdflush"
  50         default n
  51         help
  52           fdflush is only needed when changing media on slightly-broken
  53           removable media drives.  It is used to make Linux believe that a
  54           hardware disk-change switch has been actuated, which causes Linux to
  55           forget anything it has cached from the previous media.  If you have
  56           such a slightly-broken drive, you will need to run fdflush every time
  57           you change a disk.  Most people have working hardware and can safely
  58           leave this disabled.
  59
  60 config BUSYBOX_CONFIG_FDFORMAT
  61         bool "fdformat"
  62         default n
  63         help
  64           fdformat is used to low-level format a floppy disk.
  65
  66 config BUSYBOX_CONFIG_FDISK
  67         bool "fdisk"
  68         default n
  69         help
  70           The fdisk utility is used to divide hard disks into one or more
  71           logical disks, which are generally called partitions.  This utility
  72           can be used to list and edit the set of partitions or BSD style
  73           'disk slices' that are defined on a hard drive.
  74
  75 config BUSYBOX_FDISK_SUPPORT_LARGE_DISKS
  76         bool
  77         default y
  78         depends on BUSYBOX_CONFIG_FDISK
  79         help
  80           Enable this option to support large disks > 4GB.
  81
  82 config BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
  83         bool "Write support"
  84         default n
  85         depends on BUSYBOX_CONFIG_FDISK
  86         help
  87           Enabling this option allows you to create or change a partition table
  88           and write those changes out to disk.  If you leave this option
  89           disabled, you will only be able to view the partition table.
  90
  91 config BUSYBOX_CONFIG_FEATURE_AIX_LABEL
  92         bool "Support AIX disklabels"
  93         default n
  94         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
  95         help
  96           Enabling this option allows you to create or change AIX disklabels.
  97           Most people can safely leave this option disabled.
  98
  99 config BUSYBOX_CONFIG_FEATURE_SGI_LABEL
 100         bool "Support SGI disklabels"
 101         default n
 102         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 103         help
 104           Enabling this option allows you to create or change SGI disklabels.
 105           Most people can safely leave this option disabled.
 106
 107 config BUSYBOX_CONFIG_FEATURE_SUN_LABEL
 108         bool "Support SUN disklabels"
 109         default n
 110         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 111         help
 112           Enabling this option allows you to create or change SUN disklabels.
 113           Most people can safely leave this option disabled.
 114
 115 config BUSYBOX_CONFIG_FEATURE_OSF_LABEL
 116         bool "Support BSD disklabels"
 117         default n
 118         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 119         help
 120           Enabling this option allows you to create or change BSD disklabels
 121           and define and edit BSD disk slices.
 122
 123 config BUSYBOX_CONFIG_FEATURE_FDISK_ADVANCED
 124         bool "Support expert mode"
 125         default n
 126         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 127         help
 128           Enabling this option allows you to do terribly unsafe things like
 129           define arbitrary drive geometry, move the beginning of data in a
 130           partition, and similarly evil things.  Unless you have a very good
 131           reason you would be wise to leave this disabled.
 132
 133 config BUSYBOX_CONFIG_FREERAMDISK
 134         bool "freeramdisk"
 135         default n
 136         help
 137           Linux allows you to create ramdisks.  This utility allows you to
 138           delete them and completely free all memory that was used for the
 139           ramdisk.  For example, if you boot Linux into a ramdisk and later
 140           pivot_root, you may want to free the memory that is allocated to the
 141           ramdisk.  If you have no use for freeing memory from a ramdisk, leave
 142           this disabled.
 143
 144 config BUSYBOX_CONFIG_FSCK_MINIX
 145         bool "fsck_minix"
 146         default n
 147         help
 148           The minix filesystem is a nice, small, compact, read-write filesystem
 149           with little overhead.  It is not a journaling filesystem however and
 150           can experience corruption if it is not properly unmounted or if the
 151           power goes off in the middle of a write.  This utility allows you to
 152           check for and attempt to repair any corruption that occurs to a minix
 153           filesystem.
 154
 155 config BUSYBOX_CONFIG_MKFS_MINIX
 156         bool "mkfs_minix"
 157         default n
 158         help
 159           The minix filesystem is a nice, small, compact, read-write filesystem
 160           with little overhead.  If you wish to be able to create minix filesystems
 161           this utility will do the job for you.
 162
 163 comment "Minix filesystem support"
 164     depends on BUSYBOX_CONFIG_FSCK_MINIX || BUSYBOX_CONFIG_MKFS_MINIX
 165
 166 config BUSYBOX_CONFIG_FEATURE_MINIX2
 167         bool "Support Minix fs v2 (fsck_minix/mkfs_minix)"
 168         default n
 169         depends on BUSYBOX_CONFIG_FSCK_MINIX || BUSYBOX_CONFIG_MKFS_MINIX
 170         help
 171           If you wish to be able to create version 2 minix filesystems, enable this.
 172           If you enabled 'mkfs_minix' then you almost certainly want to be using the
 173           version 2 filesystem support.
 174
 175 config BUSYBOX_CONFIG_GETOPT
 176         bool "getopt"
 177         default n
 178         help
 179           The getopt utility is used to break up (parse) options in command
 180           lines to make it easy to write complex shell scripts that also check
 181           for legal (and illegal) options.  If you want to write horribly
 182           complex shell scripts, or use some horribly complex shell script
 183           written by others, this utility may be for you.  Most people will
 184           wisely leave this disabled.
 185
 186 config BUSYBOX_CONFIG_HEXDUMP
 187         bool "hexdump"
 188         default y
 189         help
 190           The hexdump utility is used to display binary data in a readable
 191           way that is comparable to the output from most hex editors.
 192
 193 config BUSYBOX_CONFIG_HWCLOCK
 194         bool "hwclock"
 195         default n
 196         help
 197           The hwclock utility is used to read and set the hardware clock
 198           on a system.  This is primarily used to set the current time on
 199           shutdown in the hardware clock, so the hardware will keep the
 200           correct time when Linux is _not_ running.
 201
 202 config BUSYBOX_CONFIG_FEATURE_HWCLOCK_LONG_OPTIONS
 203         bool "Support long options (--hctosys,...)"
 204         default n
 205         depends on BUSYBOX_CONFIG_HWCLOCK && BUSYBOX_CONFIG_GETOPT_LONG
 206         help
 207           By default, the hwclock utility only uses short options.  If you
 208           are overly fond of its long options, such as --hctosys, --utc, etc)
 209           then enable this option.
 210
 211 config BUSYBOX_CONFIG_FEATURE_HWCLOCK_ADJTIME_FHS
 212         bool "Use FHS /var/lib/hwclock/adjtime"
 213         default n
 214         depends on BUSYBOX_CONFIG_HWCLOCK
 215         help
 216           Starting with FHS 2.3, the adjtime state file is supposed to exist
 217           at /var/lib/hwclock/adjtime instead of /etc/adjtime.  If you wish
 218           to use the FHS behavior, answer Y here, otherwise answer N for the
 219           classic /etc/adjtime path.
 220
 221           http://www.pathname.com/fhs/pub/fhs-2.3.html#VARLIBHWCLOCKSTATEDIRECTORYFORHWCLO
 222
 223 config BUSYBOX_CONFIG_IPCRM
 224         bool "ipcrm"
 225         default n
 226         select BUSYBOX_CONFIG_FEATURE_SUID
 227         help
 228           The ipcrm utility allows the removal of System V interprocess
 229           communication (IPC) objects and the associated data structures
 230           from the system.
 231
 232 config BUSYBOX_CONFIG_IPCS
 233         bool "ipcs"
 234         default n
 235         select BUSYBOX_CONFIG_FEATURE_SUID
 236         help
 237           The ipcs utility is used to provide information on the currently
 238           allocated System V interprocess (IPC) objects in the system.
 239
 240 config BUSYBOX_CONFIG_LOSETUP
 241         bool "losetup"
 242         default n
 243         help
 244           losetup is used to associate or detach a loop device with a regular
 245           file or block device, and to query the status of a loop device.  This
 246           version does not currently support enabling data encryption.
 247
 248 config BUSYBOX_CONFIG_MDEV
 249         bool "mdev"
 250         default n
 251         help
 252           mdev is a mini-udev implementation: call it with -s to populate
 253           /dev from /sys, then "echo /sbin/mdev > /proc/sys/kernel/hotplug" to
 254           have it handle hotplug events afterwards.  Device names are taken
 255           from sysfs.
 256
 257 config BUSYBOX_CONFIG_FEATURE_MDEV_CONF
 258         bool "Support /etc/mdev.conf"
 259         default n
 260         depends on BUSYBOX_CONFIG_MDEV
 261         help
 262           The mdev config file contains lines that look like:
 263
 264             hd[a-z][0-9]* 0:3 660
 265
 266           That's device name (with regex match), uid:gid, and permissions.
 267
 268           Config file parsing stops on the first matching line.  If no config
 269           entry is matched, devices are created with default 0:0 660.  (Make
 270           the last line match .* to override this.)
 271
 272 config BUSYBOX_CONFIG_FEATURE_MDEV_EXEC
 273         bool "Support command execution at device addition/removal"
 274         default n
 275         depends on BUSYBOX_CONFIG_FEATURE_MDEV_CONF
 276         help
 277           This adds support for an optional field to /etc/mdev.conf, consisting
 278           of a special character and a command line to run after creating the
 279           corresponding device(s) and before removing, ala:
 280
 281             hdc root:cdrom 660  *ln -s $MDEV cdrom
 282
 283           The $MDEV environment variable is set to the name of the device.
 284
 285           The special characters and their meanings are:
 286             @ Run after creating the device.
 287             $ Run before removing the device.
 288             * Run both after creating and before removing the device.
 289
 290           Commands are executed via system() so you need /bin/sh, meaning you
 291           probably want to select a default shell in the Shells menu.
 292
 293 config BUSYBOX_CONFIG_MKSWAP
 294         bool "mkswap"
 295         default n
 296         help
 297           The mkswap utility is used to configure a file or disk partition as
 298           Linux swap space.  This allows Linux to use the entire file or
 299           partition as if it were additional RAM, which can greatly increase
 300           the capability of low-memory machines.  This additional memory is
 301           much slower than real RAM, but can be very helpful at preventing your
 302           applications being killed by the Linux out of memory (OOM) killer.
 303           Once you have created swap space using 'mkswap' you need to enable
 304           the swap space using the 'swapon' utility.
 305
 306 config BUSYBOX_CONFIG_FEATURE_MKSWAP_V0
 307         bool "version 0 support"
 308         default n
 309         depends on BUSYBOX_CONFIG_MKSWAP
 310 #       depends on BUSYBOX_CONFIG_MKSWAP && BUSYBOX_CONFIG_DEPRECATED
 311         help
 312           Enable support for the old v0 style.
 313           If your kernel is older than 2.1.117, then v0 support is the
 314           only option.
 315
 316 config BUSYBOX_CONFIG_MORE
 317         bool "more"
 318         default n
 319         help
 320           more is a simple utility which allows you to read text one screen
 321           sized page at a time.  If you want to read text that is larger than
 322           the screen, and you are using anything faster than a 300 baud modem,
 323           you will probably find this utility very helpful.  If you don't have
 324           any need to reading text files, you can leave this disabled.
 325
 326 config BUSYBOX_CONFIG_FEATURE_USE_TERMIOS
 327         bool "Use termios to manipulate the screen"
 328         default y
 329         depends on BUSYBOX_CONFIG_MORE
 330         help
 331           This option allows utilities such as 'more' and 'top' to determine
 332           the size of the screen.  If you leave this disabled, your utilities
 333           that display things on the screen will be especially primitive and
 334           will be unable to determine the current screen size, and will be
 335           unable to move the cursor.
 336
 337 config BUSYBOX_CONFIG_MOUNT
 338         bool "mount"
 339         default y
 340         help
 341           All files and filesystems in Unix are arranged into one big directory
 342           tree.  The 'mount' utility is used to graft a filesystem onto a
 343           particular part of the tree.  A filesystem can either live on a block
 344           device, or it can be accessible over the network, as is the case with
 345           NFS filesystems.  Most people using BusyBox will also want to enable
 346           the 'mount' utility.
 347
 348 config BUSYBOX_CONFIG_FEATURE_MOUNT_NFS
 349         bool "Support mounting NFS file systems"
 350         default y
 351         depends on BUSYBOX_CONFIG_MOUNT
 352         help
 353          Enable mounting of NFS file systems.
 354
 355 config BUSYBOX_CONFIG_PIVOT_ROOT
 356         bool "pivot_root"
 357         default y
 358         help
 359           The pivot_root utility swaps the mount points for the root filesystem
 360           with some other mounted filesystem.  This allows you to do all sorts
 361           of wild and crazy things with your Linux system and is far more
 362           powerful than 'chroot'.
 363
 364           Note: This is for initrd in linux 2.4.  Under initramfs (introduced
 365           in linux 2.6) use switch_root instead.
 366
 367 config BUSYBOX_CONFIG_RDATE
 368         bool "rdate"
 369         default y
 370         help
 371           The rdate utility allows you to synchronize the date and time of your
 372           system clock with the date and time of a remote networked system using
 373           the RFC868 protocol, which is built into the inetd daemon on most
 374           systems.
 375
 376 config BUSYBOX_CONFIG_READPROFILE
 377         bool "readprofile"
 378         default n
 379         help
 380           This allows you to parse /proc/profile for basic profiling.
 381
 382 config BUSYBOX_CONFIG_SETARCH
 383         bool "setarch"
 384         default n
 385         help
 386           The linux32 utility is used to create a 32bit environment for the
 387           specified program (usually a shell).  It only makes sense to have
 388           this util on a system that supports both 64bit and 32bit userland
 389           (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
 390
 391 config BUSYBOX_CONFIG_SWAPONOFF
 392         bool "swaponoff"
 393         default n
 394         help
 395           This option enables both the 'swapon' and the 'swapoff' utilities.
 396           Once you have created some swap space using 'mkswap', you also need
 397           to enable your swap space with the 'swapon' utility.  The 'swapoff'
 398           utility is used, typically at system shutdown, to disable any swap
 399           space.  If you are not using any swap space, you can leave this
 400           option disabled.
 401
 402 config BUSYBOX_CONFIG_SWITCH_ROOT
 403         bool "switch_root"
 404         default y
 405         help
 406           The switch_root utility is used from initramfs to select a new
 407           root device.  Under initramfs, you have to use this instead of
 408           pivot_root.  (Stop reading here if you don't care why.)
 409
 410           Booting with initramfs extracts a gzipped cpio archive into rootfs
 411           (which is a variant of ramfs/tmpfs).  Because rootfs can't be moved
 412           or unmounted*, pivot_root will not work from initramfs.  Instead,
 413           switch_root deletes everything out of rootfs (including itself),
 414           does a mount --move that overmounts rootfs with the new root, and
 415           then execs the specified init program.
 416
 417           * Because the Linux kernel uses rootfs internally as the starting
 418           and ending point for searching through the kernel's doubly linked
 419           list of active mount points.  That's why.
 420
 421 config BUSYBOX_CONFIG_UMOUNT
 422         bool "umount"
 423         default y
 424         help
 425           When you want to remove a mounted filesystem from its current mount point,
 426           for example when you are shutting down the system, the 'umount' utility is
 427           the tool to use.  If you enabled the 'mount' utility, you almost certainly
 428           also want to enable 'umount'.
 429
 430 config BUSYBOX_CONFIG_FEATURE_UMOUNT_ALL
 431         bool "umount -a option"
 432         default y
 433         depends on BUSYBOX_CONFIG_UMOUNT
 434         help
 435           Support -a option to unmount all currently mounted filesystems.
 436
 437 comment "Common options for mount/umount"
 438         depends on BUSYBOX_CONFIG_MOUNT || BUSYBOX_CONFIG_UMOUNT
 439
 440 config BUSYBOX_CONFIG_FEATURE_MOUNT_LOOP
 441         bool "Support loopback mounts"
 442         default y
 443         depends on BUSYBOX_CONFIG_MOUNT || BUSYBOX_CONFIG_UMOUNT
 444         help
 445           Enabling this feature allows automatic mounting of files (containing
 446           filesystem images) via the linux kernel's loopback devices.  The mount
 447           command will detect you are trying to mount a file instead of a block
 448           device, and transparently associate the file with a loopback device.
 449           The umount command will also free that loopback device.
 450
 451           You can still use the 'losetup' utility (to manually associate files
 452           with loop devices) if you need to do something advanced, such as
 453           specify an offset or cryptographic options to the loopback device.
 454           (If you don't want umount to free the loop device, use "umount -D".)
 455
 456 config BUSYBOX_CONFIG_FEATURE_MTAB_SUPPORT
 457         bool "Support for the old /etc/mtab file"
 458         default n
 459         depends on BUSYBOX_CONFIG_MOUNT || BUSYBOX_CONFIG_UMOUNT
 460         help
 461           Historically, Unix systems kept track of the currently mounted
 462           partitions in the file "/etc/mtab".  These days, the kernel exports
 463           the list of currently mounted partitions in "/proc/mounts", rendering
 464           the old mtab file obsolete.  (In modern systems, /etc/mtab should be
 465           a symlink to /proc/mounts.)
 466
 467           The only reason to have mount maintain an /etc/mtab file itself is if
 468           your stripped-down embedded system does not have a /proc directory.
 469           If you must use this, keep in mind it's inherently brittle (for
 470           example a mount under chroot won't update it), can't handle modern
 471           features like separate per-process filesystem namespaces, requires
 472           that your /etc directory be writeable, tends to get easily confused
 473           by --bind or --move mounts, won't update if you rename a directory
 474           that contains a mount point, and so on.  (In brief: avoid.)
 475
 476           About the only reason to use this is if you've removed /proc from
 477           your kernel.
 478
 479 endmenu
 480