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_FEATURE_DMESG_PRETTY
  21         bool "pretty dmesg output"
  22         default y
  23         depends on BUSYBOX_CONFIG_DMESG
  24         help
  25           If you wish to scrub the syslog level from the output, say 'Y' here.
  26           The syslog level is a string prefixed to every line with the form "<#>".
  27
  28           With this option you will see:
  29             # dmesg
  30             Linux version 2.6.17.4 .....
  31             BIOS-provided physical RAM map:
  32              BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
  33
  34           Without this option you will see:
  35             # dmesg
  36             <5>Linux version 2.6.17.4 .....
  37             <6>BIOS-provided physical RAM map:
  38             <6> BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
  39
  40 config BUSYBOX_CONFIG_FBSET
  41         bool "fbset"
  42         default n
  43         help
  44           fbset is used to show or change the settings of a Linux frame buffer
  45           device.  The frame buffer device provides a simple and unique
  46           interface to access a graphics display.  Enable this option
  47           if you wish to enable the 'fbset' utility.
  48
  49 config BUSYBOX_CONFIG_FEATURE_FBSET_FANCY
  50         bool "Turn on extra fbset options"
  51         default n
  52         depends on BUSYBOX_CONFIG_FBSET
  53         help
  54           This option enables extended fbset options, allowing one to set the
  55           framebuffer size, color depth, etc.  interface to access a graphics
  56           display.  Enable this option if you wish to enable extended fbset
  57           options.
  58
  59 config BUSYBOX_CONFIG_FEATURE_FBSET_READMODE
  60         bool "Turn on fbset readmode support"
  61         default n
  62         depends on BUSYBOX_CONFIG_FBSET
  63         help
  64           This option allows fbset to read the video mode database stored by
  65           default n /etc/fb.modes, which can be used to set frame buffer
  66           device to pre-defined video modes.
  67
  68 config BUSYBOX_CONFIG_FDFLUSH
  69         bool "fdflush"
  70         default n
  71         help
  72           fdflush is only needed when changing media on slightly-broken
  73           removable media drives.  It is used to make Linux believe that a
  74           hardware disk-change switch has been actuated, which causes Linux to
  75           forget anything it has cached from the previous media.  If you have
  76           such a slightly-broken drive, you will need to run fdflush every time
  77           you change a disk.  Most people have working hardware and can safely
  78           leave this disabled.
  79
  80 config BUSYBOX_CONFIG_FDFORMAT
  81         bool "fdformat"
  82         default n
  83         help
  84           fdformat is used to low-level format a floppy disk.
  85
  86 config BUSYBOX_CONFIG_FDISK
  87         bool "fdisk"
  88         default n
  89         help
  90           The fdisk utility is used to divide hard disks into one or more
  91           logical disks, which are generally called partitions.  This utility
  92           can be used to list and edit the set of partitions or BSD style
  93           'disk slices' that are defined on a hard drive.
  94
  95 config BUSYBOX_CONFIG_FDISK_SUPPORT_LARGE_DISKS
  96         bool "support over 4GB disks"
  97         default y
  98         depends on BUSYBOX_CONFIG_FDISK
  99         help
 100           Enable this option to support large disks > 4GB.
 101
 102 config BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 103         bool "Write support"
 104         default n
 105         depends on BUSYBOX_CONFIG_FDISK
 106         help
 107           Enabling this option allows you to create or change a partition table
 108           and write those changes out to disk.  If you leave this option
 109           disabled, you will only be able to view the partition table.
 110
 111 config BUSYBOX_CONFIG_FEATURE_AIX_LABEL
 112         bool "Support AIX disklabels"
 113         default n
 114         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 115         help
 116           Enabling this option allows you to create or change AIX disklabels.
 117           Most people can safely leave this option disabled.
 118
 119 config BUSYBOX_CONFIG_FEATURE_SGI_LABEL
 120         bool "Support SGI disklabels"
 121         default n
 122         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 123         help
 124           Enabling this option allows you to create or change SGI disklabels.
 125           Most people can safely leave this option disabled.
 126
 127 config BUSYBOX_CONFIG_FEATURE_SUN_LABEL
 128         bool "Support SUN disklabels"
 129         default n
 130         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 131         help
 132           Enabling this option allows you to create or change SUN disklabels.
 133           Most people can safely leave this option disabled.
 134
 135 config BUSYBOX_CONFIG_FEATURE_OSF_LABEL
 136         bool "Support BSD disklabels"
 137         default n
 138         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 139         help
 140           Enabling this option allows you to create or change BSD disklabels
 141           and define and edit BSD disk slices.
 142
 143 config BUSYBOX_CONFIG_FEATURE_FDISK_ADVANCED
 144         bool "Support expert mode"
 145         default n
 146         depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE
 147         help
 148           Enabling this option allows you to do terribly unsafe things like
 149           define arbitrary drive geometry, move the beginning of data in a
 150           partition, and similarly evil things.  Unless you have a very good
 151           reason you would be wise to leave this disabled.
 152
 153 config BUSYBOX_CONFIG_FREERAMDISK
 154         bool "freeramdisk"
 155         default n
 156         help
 157           Linux allows you to create ramdisks.  This utility allows you to
 158           delete them and completely free all memory that was used for the
 159           ramdisk.  For example, if you boot Linux into a ramdisk and later
 160           pivot_root, you may want to free the memory that is allocated to the
 161           ramdisk.  If you have no use for freeing memory from a ramdisk, leave
 162           this disabled.
 163
 164 config BUSYBOX_CONFIG_FSCK_MINIX
 165         bool "fsck_minix"
 166         default n
 167         help
 168           The minix filesystem is a nice, small, compact, read-write filesystem
 169           with little overhead.  It is not a journaling filesystem however and
 170           can experience corruption if it is not properly unmounted or if the
 171           power goes off in the middle of a write.  This utility allows you to
 172           check for and attempt to repair any corruption that occurs to a minix
 173           filesystem.
 174
 175 config BUSYBOX_CONFIG_MKFS_MINIX
 176         bool "mkfs_minix"
 177         default n
 178         help
 179           The minix filesystem is a nice, small, compact, read-write filesystem
 180           with little overhead.  If you wish to be able to create minix filesystems
 181           this utility will do the job for you.
 182
 183 comment "Minix filesystem support"
 184     depends on BUSYBOX_CONFIG_FSCK_MINIX || BUSYBOX_CONFIG_MKFS_MINIX
 185
 186 config BUSYBOX_CONFIG_FEATURE_MINIX2
 187         bool "Support Minix fs v2 (fsck_minix/mkfs_minix)"
 188         default n
 189         depends on BUSYBOX_CONFIG_FSCK_MINIX || BUSYBOX_CONFIG_MKFS_MINIX
 190         help
 191           If you wish to be able to create version 2 minix filesystems, enable this.
 192           If you enabled 'mkfs_minix' then you almost certainly want to be using the
 193           version 2 filesystem support.
 194
 195 config BUSYBOX_CONFIG_GETOPT
 196         bool "getopt"
 197         default n
 198         help
 199           The getopt utility is used to break up (parse) options in command
 200           lines to make it easy to write complex shell scripts that also check
 201           for legal (and illegal) options.  If you want to write horribly
 202           complex shell scripts, or use some horribly complex shell script
 203           written by others, this utility may be for you.  Most people will
 204           wisely leave this disabled.
 205
 206 config BUSYBOX_CONFIG_HEXDUMP
 207         bool "hexdump"
 208         default y
 209         help
 210           The hexdump utility is used to display binary data in a readable
 211           way that is comparable to the output from most hex editors.
 212
 213 config BUSYBOX_CONFIG_HWCLOCK
 214         bool "hwclock"
 215         default n
 216         help
 217           The hwclock utility is used to read and set the hardware clock
 218           on a system.  This is primarily used to set the current time on
 219           shutdown in the hardware clock, so the hardware will keep the
 220           correct time when Linux is _not_ running.
 221
 222 config BUSYBOX_CONFIG_FEATURE_HWCLOCK_LONG_OPTIONS
 223         bool "Support long options (--hctosys,...)"
 224         default n
 225         depends on BUSYBOX_CONFIG_HWCLOCK && BUSYBOX_CONFIG_GETOPT_LONG
 226         help
 227           By default, the hwclock utility only uses short options.  If you
 228           are overly fond of its long options, such as --hctosys, --utc, etc)
 229           then enable this option.
 230
 231 config BUSYBOX_CONFIG_FEATURE_HWCLOCK_ADJTIME_FHS
 232         bool "Use FHS /var/lib/hwclock/adjtime"
 233         default n
 234         depends on BUSYBOX_CONFIG_HWCLOCK
 235         help
 236           Starting with FHS 2.3, the adjtime state file is supposed to exist
 237           at /var/lib/hwclock/adjtime instead of /etc/adjtime.  If you wish
 238           to use the FHS behavior, answer Y here, otherwise answer N for the
 239           classic /etc/adjtime path.
 240
 241           http://www.pathname.com/fhs/pub/fhs-2.3.html#VARLIBHWCLOCKSTATEDIRECTORYFORHWCLO
 242
 243 config BUSYBOX_CONFIG_IPCRM
 244         bool "ipcrm"
 245         default n
 246         select BUSYBOX_CONFIG_FEATURE_SUID
 247         help
 248           The ipcrm utility allows the removal of System V interprocess
 249           communication (IPC) objects and the associated data structures
 250           from the system.
 251
 252 config BUSYBOX_CONFIG_IPCS
 253         bool "ipcs"
 254         default n
 255         select BUSYBOX_CONFIG_FEATURE_SUID
 256         help
 257           The ipcs utility is used to provide information on the currently
 258           allocated System V interprocess (IPC) objects in the system.
 259
 260 config BUSYBOX_CONFIG_LOSETUP
 261         bool "losetup"
 262         default n
 263         help
 264           losetup is used to associate or detach a loop device with a regular
 265           file or block device, and to query the status of a loop device.  This
 266           version does not currently support enabling data encryption.
 267
 268 config BUSYBOX_CONFIG_MDEV
 269         bool "mdev"
 270         default y
 271         help
 272           mdev is a mini-udev implementation: call it with -s to populate
 273           /dev from /sys, then "echo /sbin/mdev > /proc/sys/kernel/hotplug" to
 274           have it handle hotplug events afterwards.  Device names are taken
 275           from sysfs.
 276
 277 config BUSYBOX_CONFIG_FEATURE_MDEV_CONF
 278         bool "Support /etc/mdev.conf"
 279         default y
 280         depends on BUSYBOX_CONFIG_MDEV
 281         help
 282           The mdev config file contains lines that look like:
 283
 284             hd[a-z][0-9]* 0:3 660
 285
 286           That's device name (with regex match), uid:gid, and permissions.
 287
 288           Config file parsing stops on the first matching line.  If no config
 289           entry is matched, devices are created with default 0:0 660.  (Make
 290           the last line match .* to override this.)
 291
 292 config BUSYBOX_CONFIG_FEATURE_MDEV_EXEC
 293         bool "Support command execution at device addition/removal"
 294         default n
 295         depends on BUSYBOX_CONFIG_FEATURE_MDEV_CONF
 296         help
 297           This adds support for an optional field to /etc/mdev.conf, consisting
 298           of a special character and a command line to run after creating the
 299           corresponding device(s) and before removing, ala:
 300
 301             hdc root:cdrom 660  *ln -s $MDEV cdrom
 302
 303           The $MDEV environment variable is set to the name of the device.
 304
 305           The special characters and their meanings are:
 306             @ Run after creating the device.
 307             $ Run before removing the device.
 308             * Run both after creating and before removing the device.
 309
 310           Commands are executed via system() so you need /bin/sh, meaning you
 311           probably want to select a default shell in the Shells menu.
 312
 313 config BUSYBOX_CONFIG_MKSWAP
 314         bool "mkswap"
 315         default n
 316         help
 317           The mkswap utility is used to configure a file or disk partition as
 318           Linux swap space.  This allows Linux to use the entire file or
 319           partition as if it were additional RAM, which can greatly increase
 320           the capability of low-memory machines.  This additional memory is
 321           much slower than real RAM, but can be very helpful at preventing your
 322           applications being killed by the Linux out of memory (OOM) killer.
 323           Once you have created swap space using 'mkswap' you need to enable
 324           the swap space using the 'swapon' utility.
 325
 326 config BUSYBOX_CONFIG_FEATURE_MKSWAP_V0
 327         bool "version 0 support"
 328         default n
 329         depends on BUSYBOX_CONFIG_MKSWAP
 330 #       depends on MKSWAP && BUSYBOX_CONFIG_DEPRECATED
 331         help
 332           Enable support for the old v0 style.
 333           If your kernel is older than 2.1.117, then v0 support is the
 334           only option.
 335
 336 config BUSYBOX_CONFIG_MORE
 337         bool "more"
 338         default n
 339         help
 340           more is a simple utility which allows you to read text one screen
 341           sized page at a time.  If you want to read text that is larger than
 342           the screen, and you are using anything faster than a 300 baud modem,
 343           you will probably find this utility very helpful.  If you don't have
 344           any need to reading text files, you can leave this disabled.
 345
 346 config BUSYBOX_CONFIG_FEATURE_USE_TERMIOS
 347         bool "Use termios to manipulate the screen"
 348         default n
 349         depends on BUSYBOX_CONFIG_MORE
 350         help
 351           This option allows utilities such as 'more' and 'top' to determine
 352           the size of the screen.  If you leave this disabled, your utilities
 353           that display things on the screen will be especially primitive and
 354           will be unable to determine the current screen size, and will be
 355           unable to move the cursor.
 356
 357 config BUSYBOX_CONFIG_MOUNT
 358         bool "mount"
 359         default y
 360         help
 361           All files and filesystems in Unix are arranged into one big directory
 362           tree.  The 'mount' utility is used to graft a filesystem onto a
 363           particular part of the tree.  A filesystem can either live on a block
 364           device, or it can be accessible over the network, as is the case with
 365           NFS filesystems.  Most people using BusyBox will also want to enable
 366           the 'mount' utility.
 367
 368 config BUSYBOX_CONFIG_FEATURE_MOUNT_NFS
 369         bool "Support mounting NFS file systems"
 370         default y
 371         depends on BUSYBOX_CONFIG_MOUNT
 372         depends on BUSYBOX_CONFIG_FEATURE_HAVE_RPC
 373         select BUSYBOX_CONFIG_FEATURE_SYSLOG
 374         help
 375           Enable mounting of NFS file systems.
 376
 377 config BUSYBOX_CONFIG_FEATURE_MOUNT_CIFS
 378         bool "Support mounting CIFS/SMB file systems"
 379         default y
 380         depends on BUSYBOX_CONFIG_MOUNT
 381         help
 382           Enable support for samba mounts.
 383
 384 config BUSYBOX_CONFIG_FEATURE_MOUNT_FLAGS
 385         depends on BUSYBOX_CONFIG_MOUNT
 386         bool "Support lots of -o flags in mount"
 387         default y
 388         help
 389           Without this, mount only supports ro/rw/remount.  With this, it
 390           supports nosuid, suid, dev, nodev, exec, noexec, sync, async, atime,
 391           noatime, diratime, nodiratime, loud, bind, move, shared, slave,
 392           private, unbindable, rshared, rslave, rprivate, and runbindable.
 393
 394 config BUSYBOX_CONFIG_FEATURE_MOUNT_FSTAB
 395         depends on BUSYBOX_CONFIG_MOUNT
 396         bool "Support /etc/fstab and -a"
 397         default y
 398         help
 399           Support mount all and looking for files in /etc/fstab.
 400
 401 config BUSYBOX_CONFIG_PIVOT_ROOT
 402         bool "pivot_root"
 403         default y
 404         help
 405           The pivot_root utility swaps the mount points for the root filesystem
 406           with some other mounted filesystem.  This allows you to do all sorts
 407           of wild and crazy things with your Linux system and is far more
 408           powerful than 'chroot'.
 409
 410           Note: This is for initrd in linux 2.4.  Under initramfs (introduced
 411           in linux 2.6) use switch_root instead.
 412
 413 config BUSYBOX_CONFIG_RDATE
 414         bool "rdate"
 415         default y
 416         help
 417           The rdate utility allows you to synchronize the date and time of your
 418           system clock with the date and time of a remote networked system using
 419           the RFC868 protocol, which is built into the inetd daemon on most
 420           systems.
 421
 422 config BUSYBOX_CONFIG_READPROFILE
 423         bool "readprofile"
 424         default n
 425         help
 426           This allows you to parse /proc/profile for basic profiling.
 427
 428 config BUSYBOX_CONFIG_SETARCH
 429         bool "setarch"
 430         default n
 431         help
 432           The linux32 utility is used to create a 32bit environment for the
 433           specified program (usually a shell).  It only makes sense to have
 434           this util on a system that supports both 64bit and 32bit userland
 435           (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
 436
 437 config BUSYBOX_CONFIG_SWAPONOFF
 438         bool "swaponoff"
 439         default n
 440         help
 441           This option enables both the 'swapon' and the 'swapoff' utilities.
 442           Once you have created some swap space using 'mkswap', you also need
 443           to enable your swap space with the 'swapon' utility.  The 'swapoff'
 444           utility is used, typically at system shutdown, to disable any swap
 445           space.  If you are not using any swap space, you can leave this
 446           option disabled.
 447
 448 config BUSYBOX_CONFIG_SWITCH_ROOT
 449         bool "switch_root"
 450         default y
 451         help
 452           The switch_root utility is used from initramfs to select a new
 453           root device.  Under initramfs, you have to use this instead of
 454           pivot_root.  (Stop reading here if you don't care why.)
 455
 456           Booting with initramfs extracts a gzipped cpio archive into rootfs
 457           (which is a variant of ramfs/tmpfs).  Because rootfs can't be moved
 458           or unmounted*, pivot_root will not work from initramfs.  Instead,
 459           switch_root deletes everything out of rootfs (including itself),
 460           does a mount --move that overmounts rootfs with the new root, and
 461           then execs the specified init program.
 462
 463           * Because the Linux kernel uses rootfs internally as the starting
 464           and ending point for searching through the kernel's doubly linked
 465           list of active mount points.  That's why.
 466
 467 config BUSYBOX_CONFIG_UMOUNT
 468         bool "umount"
 469         default y
 470         help
 471           When you want to remove a mounted filesystem from its current mount point,
 472           for example when you are shutting down the system, the 'umount' utility is
 473           the tool to use.  If you enabled the 'mount' utility, you almost certainly
 474           also want to enable 'umount'.
 475
 476 config BUSYBOX_CONFIG_FEATURE_UMOUNT_ALL
 477         bool "umount -a option"
 478         default y
 479         depends on BUSYBOX_CONFIG_UMOUNT
 480         help
 481           Support -a option to unmount all currently mounted filesystems.
 482
 483 comment "Common options for mount/umount"
 484         depends on BUSYBOX_CONFIG_MOUNT || BUSYBOX_CONFIG_UMOUNT
 485
 486 config BUSYBOX_CONFIG_FEATURE_MOUNT_LOOP
 487         bool "Support loopback mounts"
 488         default y
 489         depends on BUSYBOX_CONFIG_MOUNT || BUSYBOX_CONFIG_UMOUNT
 490         help
 491           Enabling this feature allows automatic mounting of files (containing
 492           filesystem images) via the linux kernel's loopback devices.  The mount
 493           command will detect you are trying to mount a file instead of a block
 494           device, and transparently associate the file with a loopback device.
 495           The umount command will also free that loopback device.
 496
 497           You can still use the 'losetup' utility (to manually associate files
 498           with loop devices) if you need to do something advanced, such as
 499           specify an offset or cryptographic options to the loopback device.
 500           (If you don't want umount to free the loop device, use "umount -D".)
 501
 502 config BUSYBOX_CONFIG_FEATURE_MTAB_SUPPORT
 503         bool "Support for the old /etc/mtab file"
 504         default n
 505         depends on BUSYBOX_CONFIG_MOUNT || BUSYBOX_CONFIG_UMOUNT
 506         help
 507           Historically, Unix systems kept track of the currently mounted
 508           partitions in the file "/etc/mtab".  These days, the kernel exports
 509           the list of currently mounted partitions in "/proc/mounts", rendering
 510           the old mtab file obsolete.  (In modern systems, /etc/mtab should be
 511           a symlink to /proc/mounts.)
 512
 513           The only reason to have mount maintain an /etc/mtab file itself is if
 514           your stripped-down embedded system does not have a /proc directory.
 515           If you must use this, keep in mind it's inherently brittle (for
 516           example a mount under chroot won't update it), can't handle modern
 517           features like separate per-process filesystem namespaces, requires
 518           that your /etc directory be writeable, tends to get easily confused
 519           by --bind or --move mounts, won't update if you rename a directory
 520           that contains a mount point, and so on.  (In brief: avoid.)
 521
 522           About the only reason to use this is if you've removed /proc from
 523           your kernel.
 524
 525 endmenu
 526