2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
6 menu "Linux System Utilities"
13 depends on PLATFORM_LINUX
15 acpid listens to ACPI events coming either in textual form from
16 /proc/acpi/event (though it is marked deprecated it is still widely
17 used and _is_ a standard) or in binary form from specified evdevs
18 (just use /dev/input/event*).
20 It parses the event to retrieve ACTION and a possible PARAMETER.
21 It then spawns /etc/acpi/<ACTION>[/<PARAMETER>] either via run-parts
22 (if the resulting path is a directory) or directly as an executable.
24 N.B. acpid relies on run-parts so have the latter installed.
26 config FEATURE_ACPID_COMPAT
27 bool "Accept and ignore redundant options"
31 Accept and ignore compatibility options -g -m -s -S -v.
36 depends on PLATFORM_LINUX
39 Lists labels and UUIDs of all filesystems.
41 With all submodules selected, it will add ~8k to busybox.
46 depends on PLATFORM_LINUX
48 dmesg is used to examine or control the kernel ring buffer. When the
49 Linux kernel prints messages to the system log, they are stored in
50 the kernel ring buffer. You can use dmesg to print the kernel's ring
51 buffer, clear the kernel ring buffer, change the size of the kernel
52 ring buffer, and change the priority level at which kernel messages
53 are also logged to the system console. Enable this option if you
54 wish to enable the 'dmesg' utility.
56 config FEATURE_DMESG_PRETTY
57 bool "Pretty dmesg output"
61 If you wish to scrub the syslog level from the output, say 'Y' here.
62 The syslog level is a string prefixed to every line with the form
65 With this option you will see:
67 Linux version 2.6.17.4 .....
68 BIOS-provided physical RAM map:
69 BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
71 Without this option you will see:
73 <5>Linux version 2.6.17.4 .....
74 <6>BIOS-provided physical RAM map:
75 <6> BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
80 depends on PLATFORM_LINUX
82 fbset is used to show or change the settings of a Linux frame buffer
83 device. The frame buffer device provides a simple and unique
84 interface to access a graphics display. Enable this option
85 if you wish to enable the 'fbset' utility.
87 config FEATURE_FBSET_FANCY
88 bool "Turn on extra fbset options"
92 This option enables extended fbset options, allowing one to set the
93 framebuffer size, color depth, etc. interface to access a graphics
94 display. Enable this option if you wish to enable extended fbset
97 config FEATURE_FBSET_READMODE
98 bool "Turn on fbset readmode support"
102 This option allows fbset to read the video mode database stored by
103 default as /etc/fb.modes, which can be used to set frame buffer
104 device to pre-defined video modes.
109 depends on PLATFORM_LINUX
111 fdflush is only needed when changing media on slightly-broken
112 removable media drives. It is used to make Linux believe that a
113 hardware disk-change switch has been actuated, which causes Linux to
114 forget anything it has cached from the previous media. If you have
115 such a slightly-broken drive, you will need to run fdflush every time
116 you change a disk. Most people have working hardware and can safely
122 depends on PLATFORM_LINUX
124 fdformat is used to low-level format a floppy disk.
129 depends on PLATFORM_LINUX
131 The fdisk utility is used to divide hard disks into one or more
132 logical disks, which are generally called partitions. This utility
133 can be used to list and edit the set of partitions or BSD style
134 'disk slices' that are defined on a hard drive.
136 config FDISK_SUPPORT_LARGE_DISKS
137 bool "Support over 4GB disks"
141 Enable this option to support large disks > 4GB.
143 config FEATURE_FDISK_WRITABLE
148 Enabling this option allows you to create or change a partition table
149 and write those changes out to disk. If you leave this option
150 disabled, you will only be able to view the partition table.
152 config FEATURE_AIX_LABEL
153 bool "Support AIX disklabels"
155 depends on FDISK && FEATURE_FDISK_WRITABLE
157 Enabling this option allows you to create or change AIX disklabels.
158 Most people can safely leave this option disabled.
160 config FEATURE_SGI_LABEL
161 bool "Support SGI disklabels"
163 depends on FDISK && FEATURE_FDISK_WRITABLE
165 Enabling this option allows you to create or change SGI disklabels.
166 Most people can safely leave this option disabled.
168 config FEATURE_SUN_LABEL
169 bool "Support SUN disklabels"
171 depends on FDISK && FEATURE_FDISK_WRITABLE
173 Enabling this option allows you to create or change SUN disklabels.
174 Most people can safely leave this option disabled.
176 config FEATURE_OSF_LABEL
177 bool "Support BSD disklabels"
179 depends on FDISK && FEATURE_FDISK_WRITABLE
181 Enabling this option allows you to create or change BSD disklabels
182 and define and edit BSD disk slices.
184 config FEATURE_GPT_LABEL
185 bool "Support GPT disklabels"
187 depends on FDISK && FEATURE_FDISK_WRITABLE
189 Enabling this option allows you to view GUID Partition Table
192 config FEATURE_FDISK_ADVANCED
193 bool "Support expert mode"
195 depends on FDISK && FEATURE_FDISK_WRITABLE
197 Enabling this option allows you to do terribly unsafe things like
198 define arbitrary drive geometry, move the beginning of data in a
199 partition, and similarly evil things. Unless you have a very good
200 reason you would be wise to leave this disabled.
205 depends on PLATFORM_LINUX
208 Prints the name of a filesystem with given label or UUID.
210 With all submodules selected, it will add ~8k to busybox.
216 Manage locks from shell scripts
221 depends on PLATFORM_LINUX
223 Linux allows you to create ramdisks. This utility allows you to
224 delete them and completely free all memory that was used for the
225 ramdisk. For example, if you boot Linux into a ramdisk and later
226 pivot_root, you may want to free the memory that is allocated to the
227 ramdisk. If you have no use for freeing memory from a ramdisk, leave
234 The minix filesystem is a nice, small, compact, read-write filesystem
235 with little overhead. It is not a journaling filesystem however and
236 can experience corruption if it is not properly unmounted or if the
237 power goes off in the middle of a write. This utility allows you to
238 check for and attempt to repair any corruption that occurs to a minix
244 depends on PLATFORM_LINUX
246 Utility to create EXT2 filesystems.
251 depends on PLATFORM_LINUX
253 The minix filesystem is a nice, small, compact, read-write filesystem
254 with little overhead. If you wish to be able to create minix
255 filesystems this utility will do the job for you.
257 config FEATURE_MINIX2
258 bool "Support Minix fs v2 (fsck_minix/mkfs_minix)"
260 depends on FSCK_MINIX || MKFS_MINIX
262 If you wish to be able to create version 2 minix filesystems, enable
263 this. If you enabled 'mkfs_minix' then you almost certainly want to
264 be using the version 2 filesystem support.
269 depends on PLATFORM_LINUX
271 Utility to create ReiserFS filesystems.
272 Note: this applet needs a lot of testing and polishing.
277 depends on PLATFORM_LINUX
279 Utility to create FAT32 filesystems.
285 The getopt utility is used to break up (parse) options in command
286 lines to make it easy to write complex shell scripts that also check
287 for legal (and illegal) options. If you want to write horribly
288 complex shell scripts, or use some horribly complex shell script
289 written by others, this utility may be for you. Most people will
290 wisely leave this disabled.
292 config FEATURE_GETOPT_LONG
293 bool "Support option -l"
294 default y if LONG_OPTS
297 Enable support for long options (option -l).
303 The hexdump utility is used to display binary data in a readable
304 way that is comparable to the output from most hex editors.
306 config FEATURE_HEXDUMP_REVERSE
307 bool "Support -R, reverse of 'hexdump -Cv'"
311 The hexdump utility is used to display binary data in an ascii
312 readable way. This option creates binary data from an ascii input.
313 NB: this option is non-standard. It's unwise to use it in scripts
314 aimed to be portable.
321 hd is an alias to hexdump -C.
326 depends on PLATFORM_LINUX
328 The hwclock utility is used to read and set the hardware clock
329 on a system. This is primarily used to set the current time on
330 shutdown in the hardware clock, so the hardware will keep the
331 correct time when Linux is _not_ running.
333 config FEATURE_HWCLOCK_LONG_OPTIONS
334 bool "Support long options (--hctosys,...)"
336 depends on HWCLOCK && LONG_OPTS
338 By default, the hwclock utility only uses short options. If you
339 are overly fond of its long options, such as --hctosys, --utc, etc)
340 then enable this option.
342 config FEATURE_HWCLOCK_ADJTIME_FHS
343 bool "Use FHS /var/lib/hwclock/adjtime"
344 default n # util-linux-ng in Fedora 13 still uses /etc/adjtime
347 Starting with FHS 2.3, the adjtime state file is supposed to exist
348 at /var/lib/hwclock/adjtime instead of /etc/adjtime. If you wish
349 to use the FHS behavior, answer Y here, otherwise answer N for the
350 classic /etc/adjtime path.
352 pathname.com/fhs/pub/fhs-2.3.html#VARLIBHWCLOCKSTATEDIRECTORYFORHWCLO
358 The ipcrm utility allows the removal of System V interprocess
359 communication (IPC) objects and the associated data structures
365 depends on PLATFORM_LINUX
367 The ipcs utility is used to provide information on the currently
368 allocated System V interprocess (IPC) objects in the system.
373 depends on PLATFORM_LINUX
375 losetup is used to associate or detach a loop device with a regular
376 file or block device, and to query the status of a loop device. This
377 version does not currently support enabling data encryption.
382 #depends on PLATFORM_LINUX
384 lspci is a utility for displaying information about PCI buses in the
385 system and devices connected to them.
387 This version uses sysfs (/sys/bus/pci/devices) only.
392 #depends on PLATFORM_LINUX
394 lsusb is a utility for displaying information about USB buses in the
395 system and devices connected to them.
397 This version uses sysfs (/sys/bus/usb/devices) only.
402 depends on PLATFORM_LINUX
404 mdev is a mini-udev implementation for dynamically creating device
405 nodes in the /dev directory.
407 For more information, please see docs/mdev.txt
409 config FEATURE_MDEV_CONF
410 bool "Support /etc/mdev.conf"
414 Add support for the mdev config file to control ownership and
415 permissions of the device nodes.
417 For more information, please see docs/mdev.txt
419 config FEATURE_MDEV_RENAME
420 bool "Support subdirs/symlinks"
422 depends on FEATURE_MDEV_CONF
424 Add support for renaming devices and creating symlinks.
426 For more information, please see docs/mdev.txt
428 config FEATURE_MDEV_RENAME_REGEXP
429 bool "Support regular expressions substitutions when renaming device"
431 depends on FEATURE_MDEV_RENAME
433 Add support for regular expressions substitutions when renaming
436 config FEATURE_MDEV_EXEC
437 bool "Support command execution at device addition/removal"
439 depends on FEATURE_MDEV_CONF
441 This adds support for an optional field to /etc/mdev.conf for
442 executing commands when devices are created/removed.
444 For more information, please see docs/mdev.txt
446 config FEATURE_MDEV_LOAD_FIRMWARE
447 bool "Support loading of firmwares"
451 Some devices need to load firmware before they can be usable.
453 These devices will request userspace look up the files in
454 /lib/firmware/ and if it exists, send it to the kernel for
455 loading into the hardware.
461 The mkswap utility is used to configure a file or disk partition as
462 Linux swap space. This allows Linux to use the entire file or
463 partition as if it were additional RAM, which can greatly increase
464 the capability of low-memory machines. This additional memory is
465 much slower than real RAM, but can be very helpful at preventing your
466 applications being killed by the Linux out of memory (OOM) killer.
467 Once you have created swap space using 'mkswap' you need to enable
468 the swap space using the 'swapon' utility.
470 config FEATURE_MKSWAP_UUID
475 Generate swap spaces with universally unique identifiers.
481 more is a simple utility which allows you to read text one screen
482 sized page at a time. If you want to read text that is larger than
483 the screen, and you are using anything faster than a 300 baud modem,
484 you will probably find this utility very helpful. If you don't have
485 any need to reading text files, you can leave this disabled.
490 depends on PLATFORM_LINUX
492 All files and filesystems in Unix are arranged into one big directory
493 tree. The 'mount' utility is used to graft a filesystem onto a
494 particular part of the tree. A filesystem can either live on a block
495 device, or it can be accessible over the network, as is the case with
496 NFS filesystems. Most people using BusyBox will also want to enable
499 config FEATURE_MOUNT_FAKE
500 bool "Support option -f"
504 Enable support for faking a file system mount.
506 config FEATURE_MOUNT_VERBOSE
507 bool "Support option -v"
511 Enable multi-level -v[vv...] verbose messages. Useful if you
512 debug mount problems and want to see what is exactly passed
515 config FEATURE_MOUNT_HELPERS
516 bool "Support mount helpers"
520 Enable mounting of virtual file systems via external helpers.
521 E.g. "mount obexfs#-b00.11.22.33.44.55 /mnt" will in effect call
522 "obexfs -b00.11.22.33.44.55 /mnt"
523 Also "mount -t sometype [-o opts] fs /mnt" will try
524 "sometype [-o opts] fs /mnt" if simple mount syscall fails.
525 The idea is to use such virtual filesystems in /etc/fstab.
527 config FEATURE_MOUNT_LABEL
528 bool "Support specifying devices by label or UUID"
533 This allows for specifying a device by label or uuid, rather than by
534 name. This feature utilizes the same functionality as blkid/findfs.
535 This also enables label or uuid support for swapon.
537 config FEATURE_MOUNT_NFS
538 bool "Support mounting NFS file systems"
541 select FEATURE_HAVE_RPC
542 select FEATURE_SYSLOG
544 Enable mounting of NFS file systems.
546 config FEATURE_MOUNT_CIFS
547 bool "Support mounting CIFS/SMB file systems"
551 Enable support for samba mounts.
553 config FEATURE_MOUNT_FLAGS
555 bool "Support lots of -o flags in mount"
558 Without this, mount only supports ro/rw/remount. With this, it
559 supports nosuid, suid, dev, nodev, exec, noexec, sync, async, atime,
560 noatime, diratime, nodiratime, loud, bind, move, shared, slave,
561 private, unbindable, rshared, rslave, rprivate, and runbindable.
563 config FEATURE_MOUNT_FSTAB
565 bool "Support /etc/fstab and -a"
568 Support mount all and looking for files in /etc/fstab.
573 depends on PLATFORM_LINUX
575 The pivot_root utility swaps the mount points for the root filesystem
576 with some other mounted filesystem. This allows you to do all sorts
577 of wild and crazy things with your Linux system and is far more
578 powerful than 'chroot'.
580 Note: This is for initrd in linux 2.4. Under initramfs (introduced
581 in linux 2.6) use switch_root instead.
587 The rdate utility allows you to synchronize the date and time of your
588 system clock with the date and time of a remote networked system using
589 the RFC868 protocol, which is built into the inetd daemon on most
596 Print the device node associated with the filesystem mounted at '/'.
601 #depends on PLATFORM_LINUX
603 This allows you to parse /proc/profile for basic profiling.
608 depends on PLATFORM_LINUX
610 Enter a system sleep state until specified wakeup time.
616 The script makes typescript of terminal session.
622 This program replays a typescript, using timing information
628 depends on PLATFORM_LINUX
630 The linux32 utility is used to create a 32bit environment for the
631 specified program (usually a shell). It only makes sense to have
632 this util on a system that supports both 64bit and 32bit userland
633 (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
638 depends on PLATFORM_LINUX
640 This option enables both the 'swapon' and the 'swapoff' utilities.
641 Once you have created some swap space using 'mkswap', you also need
642 to enable your swap space with the 'swapon' utility. The 'swapoff'
643 utility is used, typically at system shutdown, to disable any swap
644 space. If you are not using any swap space, you can leave this
647 config FEATURE_SWAPON_PRI
648 bool "Support priority option -p"
652 Enable support for setting swap device priority in swapon.
657 depends on PLATFORM_LINUX
659 The switch_root utility is used from initramfs to select a new
660 root device. Under initramfs, you have to use this instead of
661 pivot_root. (Stop reading here if you don't care why.)
663 Booting with initramfs extracts a gzipped cpio archive into rootfs
664 (which is a variant of ramfs/tmpfs). Because rootfs can't be moved
665 or unmounted*, pivot_root will not work from initramfs. Instead,
666 switch_root deletes everything out of rootfs (including itself),
667 does a mount --move that overmounts rootfs with the new root, and
668 then execs the specified init program.
670 * Because the Linux kernel uses rootfs internally as the starting
671 and ending point for searching through the kernel's doubly linked
672 list of active mount points. That's why.
677 depends on PLATFORM_LINUX
679 When you want to remove a mounted filesystem from its current mount
680 point, for example when you are shutting down the system, the
681 'umount' utility is the tool to use. If you enabled the 'mount'
682 utility, you almost certainly also want to enable 'umount'.
684 config FEATURE_UMOUNT_ALL
685 bool "Support option -a"
689 Support -a option to unmount all currently mounted filesystems.
691 comment "Common options for mount/umount"
692 depends on MOUNT || UMOUNT
694 config FEATURE_MOUNT_LOOP
695 bool "Support loopback mounts"
697 depends on MOUNT || UMOUNT
699 Enabling this feature allows automatic mounting of files (containing
700 filesystem images) via the linux kernel's loopback devices.
701 The mount command will detect you are trying to mount a file instead
702 of a block device, and transparently associate the file with a
703 loopback device. The umount command will also free that loopback
706 You can still use the 'losetup' utility (to manually associate files
707 with loop devices) if you need to do something advanced, such as
708 specify an offset or cryptographic options to the loopback device.
709 (If you don't want umount to free the loop device, use "umount -D".)
711 config FEATURE_MOUNT_LOOP_CREATE
712 bool "Create new loopback devices if needed"
714 depends on FEATURE_MOUNT_LOOP
716 Linux kernels >= 2.6.24 support unlimited loopback devices. They are
717 allocated for use when trying to use a loop device. The loop device
720 This feature lets mount to try to create next /dev/loopN device
721 if it does not find a free one.
723 config FEATURE_MTAB_SUPPORT
724 bool "Support for the old /etc/mtab file"
726 depends on MOUNT || UMOUNT
727 select FEATURE_MOUNT_FAKE
729 Historically, Unix systems kept track of the currently mounted
730 partitions in the file "/etc/mtab". These days, the kernel exports
731 the list of currently mounted partitions in "/proc/mounts", rendering
732 the old mtab file obsolete. (In modern systems, /etc/mtab should be
733 a symlink to /proc/mounts.)
735 The only reason to have mount maintain an /etc/mtab file itself is if
736 your stripped-down embedded system does not have a /proc directory.
737 If you must use this, keep in mind it's inherently brittle (for
738 example a mount under chroot won't update it), can't handle modern
739 features like separate per-process filesystem namespaces, requires
740 that your /etc directory be writable, tends to get easily confused
741 by --bind or --move mounts, won't update if you rename a directory
742 that contains a mount point, and so on. (In brief: avoid.)
744 About the only reason to use this is if you've removed /proc from
748 bool #No description makes it a hidden option
751 menu "Filesystem/Volume identification"
754 config FEATURE_VOLUMEID_EXT
755 bool "Ext filesystem"
761 config FEATURE_VOLUMEID_BTRFS
762 bool "btrfs filesystem"
768 config FEATURE_VOLUMEID_REISERFS
769 bool "Reiser filesystem"
775 config FEATURE_VOLUMEID_FAT
776 bool "fat filesystem"
782 config FEATURE_VOLUMEID_HFS
783 bool "hfs filesystem"
789 config FEATURE_VOLUMEID_JFS
790 bool "jfs filesystem"
796 ### config FEATURE_VOLUMEID_UFS
797 ### bool "ufs filesystem"
799 ### depends on VOLUMEID
803 config FEATURE_VOLUMEID_XFS
804 bool "xfs filesystem"
810 config FEATURE_VOLUMEID_NTFS
811 bool "ntfs filesystem"
817 config FEATURE_VOLUMEID_ISO9660
818 bool "iso9660 filesystem"
824 config FEATURE_VOLUMEID_UDF
825 bool "udf filesystem"
831 config FEATURE_VOLUMEID_LUKS
832 bool "luks filesystem"
838 config FEATURE_VOLUMEID_LINUXSWAP
839 bool "linux swap filesystem"
845 ### config FEATURE_VOLUMEID_LVM
848 ### depends on VOLUMEID
852 config FEATURE_VOLUMEID_CRAMFS
853 bool "cramfs filesystem"
859 ### config FEATURE_VOLUMEID_HPFS
860 ### bool "hpfs filesystem"
862 ### depends on VOLUMEID
866 config FEATURE_VOLUMEID_ROMFS
867 bool "romfs filesystem"
873 config FEATURE_VOLUMEID_SYSV
874 bool "sysv filesystem"
880 ### config FEATURE_VOLUMEID_MINIX
881 ### bool "minix filesystem"
883 ### depends on VOLUMEID
887 ### These only detect partition tables - not used (yet?)
888 ### config FEATURE_VOLUMEID_MAC
889 ### bool "mac filesystem"
891 ### depends on VOLUMEID
895 ### config FEATURE_VOLUMEID_MSDOS
896 ### bool "msdos filesystem"
898 ### depends on VOLUMEID
902 config FEATURE_VOLUMEID_OCFS2
903 bool "ocfs2 filesystem"
909 ### config FEATURE_VOLUMEID_HIGHPOINTRAID
910 ### bool "highpoint raid"
912 ### depends on VOLUMEID
916 ### config FEATURE_VOLUMEID_ISWRAID
917 ### bool "intel raid"
919 ### depends on VOLUMEID
923 ### config FEATURE_VOLUMEID_LSIRAID
926 ### depends on VOLUMEID
930 ### config FEATURE_VOLUMEID_VIARAID
933 ### depends on VOLUMEID
937 ### config FEATURE_VOLUMEID_SILICONRAID
938 ### bool "silicon raid"
940 ### depends on VOLUMEID
944 ### config FEATURE_VOLUMEID_NVIDIARAID
945 ### bool "nvidia raid"
947 ### depends on VOLUMEID
951 ### config FEATURE_VOLUMEID_PROMISERAID
952 ### bool "promise raid"
954 ### depends on VOLUMEID
958 config FEATURE_VOLUMEID_LINUXRAID