2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
6 menu "Linux System Utilities"
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.
39 Lists labels and UUIDs of all filesystems.
41 With all submodules selected, it will add ~8k to busybox.
43 config FEATURE_BLKID_TYPE
44 bool "Print filesystem type"
48 Show TYPE="filesystem type"
55 dmesg is used to examine or control the kernel ring buffer. When the
56 Linux kernel prints messages to the system log, they are stored in
57 the kernel ring buffer. You can use dmesg to print the kernel's ring
58 buffer, clear the kernel ring buffer, change the size of the kernel
59 ring buffer, and change the priority level at which kernel messages
60 are also logged to the system console. Enable this option if you
61 wish to enable the 'dmesg' utility.
63 config FEATURE_DMESG_PRETTY
64 bool "Pretty dmesg output"
68 If you wish to scrub the syslog level from the output, say 'Y' here.
69 The syslog level is a string prefixed to every line with the form
72 With this option you will see:
74 Linux version 2.6.17.4 .....
75 BIOS-provided physical RAM map:
76 BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
78 Without this option you will see:
80 <5>Linux version 2.6.17.4 .....
81 <6>BIOS-provided physical RAM map:
82 <6> BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
89 fbset is used to show or change the settings of a Linux frame buffer
90 device. The frame buffer device provides a simple and unique
91 interface to access a graphics display. Enable this option
92 if you wish to enable the 'fbset' utility.
94 config FEATURE_FBSET_FANCY
95 bool "Turn on extra fbset options"
99 This option enables extended fbset options, allowing one to set the
100 framebuffer size, color depth, etc. interface to access a graphics
101 display. Enable this option if you wish to enable extended fbset
104 config FEATURE_FBSET_READMODE
105 bool "Turn on fbset readmode support"
109 This option allows fbset to read the video mode database stored by
110 default as /etc/fb.modes, which can be used to set frame buffer
111 device to pre-defined video modes.
116 select PLATFORM_LINUX
118 fdflush is only needed when changing media on slightly-broken
119 removable media drives. It is used to make Linux believe that a
120 hardware disk-change switch has been actuated, which causes Linux to
121 forget anything it has cached from the previous media. If you have
122 such a slightly-broken drive, you will need to run fdflush every time
123 you change a disk. Most people have working hardware and can safely
129 select PLATFORM_LINUX
131 fdformat is used to low-level format a floppy disk.
136 select PLATFORM_LINUX
138 The fdisk utility is used to divide hard disks into one or more
139 logical disks, which are generally called partitions. This utility
140 can be used to list and edit the set of partitions or BSD style
141 'disk slices' that are defined on a hard drive.
143 config FDISK_SUPPORT_LARGE_DISKS
144 bool "Support over 4GB disks"
147 depends on !LFS # with LFS no special code is needed
149 Enable this option to support large disks > 4GB.
151 config FEATURE_FDISK_WRITABLE
156 Enabling this option allows you to create or change a partition table
157 and write those changes out to disk. If you leave this option
158 disabled, you will only be able to view the partition table.
160 config FEATURE_AIX_LABEL
161 bool "Support AIX disklabels"
163 depends on FDISK && FEATURE_FDISK_WRITABLE
165 Enabling this option allows you to create or change AIX disklabels.
166 Most people can safely leave this option disabled.
168 config FEATURE_SGI_LABEL
169 bool "Support SGI disklabels"
171 depends on FDISK && FEATURE_FDISK_WRITABLE
173 Enabling this option allows you to create or change SGI disklabels.
174 Most people can safely leave this option disabled.
176 config FEATURE_SUN_LABEL
177 bool "Support SUN disklabels"
179 depends on FDISK && FEATURE_FDISK_WRITABLE
181 Enabling this option allows you to create or change SUN disklabels.
182 Most people can safely leave this option disabled.
184 config FEATURE_OSF_LABEL
185 bool "Support BSD disklabels"
187 depends on FDISK && FEATURE_FDISK_WRITABLE
189 Enabling this option allows you to create or change BSD disklabels
190 and define and edit BSD disk slices.
192 config FEATURE_GPT_LABEL
193 bool "Support GPT disklabels"
195 depends on FDISK && FEATURE_FDISK_WRITABLE
197 Enabling this option allows you to view GUID Partition Table
200 config FEATURE_FDISK_ADVANCED
201 bool "Support expert mode"
203 depends on FDISK && FEATURE_FDISK_WRITABLE
205 Enabling this option allows you to do terribly unsafe things like
206 define arbitrary drive geometry, move the beginning of data in a
207 partition, and similarly evil things. Unless you have a very good
208 reason you would be wise to leave this disabled.
213 select PLATFORM_LINUX
216 Prints the name of a filesystem with given label or UUID.
218 With all submodules selected, it will add ~8k to busybox.
224 Manage locks from shell scripts
229 select PLATFORM_LINUX
231 Linux allows you to create ramdisks. This utility allows you to
232 delete them and completely free all memory that was used for the
233 ramdisk. For example, if you boot Linux into a ramdisk and later
234 pivot_root, you may want to free the memory that is allocated to the
235 ramdisk. If you have no use for freeing memory from a ramdisk, leave
242 The minix filesystem is a nice, small, compact, read-write filesystem
243 with little overhead. It is not a journaling filesystem however and
244 can experience corruption if it is not properly unmounted or if the
245 power goes off in the middle of a write. This utility allows you to
246 check for and attempt to repair any corruption that occurs to a minix
252 select PLATFORM_LINUX
254 Utility to create EXT2 filesystems.
259 select PLATFORM_LINUX
261 The minix filesystem is a nice, small, compact, read-write filesystem
262 with little overhead. If you wish to be able to create minix
263 filesystems this utility will do the job for you.
265 config FEATURE_MINIX2
266 bool "Support Minix fs v2 (fsck_minix/mkfs_minix)"
268 depends on FSCK_MINIX || MKFS_MINIX
270 If you wish to be able to create version 2 minix filesystems, enable
271 this. If you enabled 'mkfs_minix' then you almost certainly want to
272 be using the version 2 filesystem support.
277 select PLATFORM_LINUX
279 Utility to create ReiserFS filesystems.
280 Note: this applet needs a lot of testing and polishing.
285 select PLATFORM_LINUX
287 Utility to create FAT32 filesystems.
293 The getopt utility is used to break up (parse) options in command
294 lines to make it easy to write complex shell scripts that also check
295 for legal (and illegal) options. If you want to write horribly
296 complex shell scripts, or use some horribly complex shell script
297 written by others, this utility may be for you. Most people will
298 wisely leave this disabled.
300 config FEATURE_GETOPT_LONG
301 bool "Support option -l"
302 default y if LONG_OPTS
305 Enable support for long options (option -l).
311 The hexdump utility is used to display binary data in a readable
312 way that is comparable to the output from most hex editors.
314 config FEATURE_HEXDUMP_REVERSE
315 bool "Support -R, reverse of 'hexdump -Cv'"
319 The hexdump utility is used to display binary data in an ascii
320 readable way. This option creates binary data from an ascii input.
321 NB: this option is non-standard. It's unwise to use it in scripts
322 aimed to be portable.
329 hd is an alias to hexdump -C.
334 select PLATFORM_LINUX
336 The hwclock utility is used to read and set the hardware clock
337 on a system. This is primarily used to set the current time on
338 shutdown in the hardware clock, so the hardware will keep the
339 correct time when Linux is _not_ running.
341 config FEATURE_HWCLOCK_LONG_OPTIONS
342 bool "Support long options (--hctosys,...)"
344 depends on HWCLOCK && LONG_OPTS
346 By default, the hwclock utility only uses short options. If you
347 are overly fond of its long options, such as --hctosys, --utc, etc)
348 then enable this option.
350 config FEATURE_HWCLOCK_ADJTIME_FHS
351 bool "Use FHS /var/lib/hwclock/adjtime"
352 default n # util-linux-ng in Fedora 13 still uses /etc/adjtime
355 Starting with FHS 2.3, the adjtime state file is supposed to exist
356 at /var/lib/hwclock/adjtime instead of /etc/adjtime. If you wish
357 to use the FHS behavior, answer Y here, otherwise answer N for the
358 classic /etc/adjtime path.
360 pathname.com/fhs/pub/fhs-2.3.html#VARLIBHWCLOCKSTATEDIRECTORYFORHWCLO
366 The ipcrm utility allows the removal of System V interprocess
367 communication (IPC) objects and the associated data structures
373 select PLATFORM_LINUX
375 The ipcs utility is used to provide information on the currently
376 allocated System V interprocess (IPC) objects in the system.
381 select PLATFORM_LINUX
383 losetup is used to associate or detach a loop device with a regular
384 file or block device, and to query the status of a loop device. This
385 version does not currently support enabling data encryption.
390 #select PLATFORM_LINUX
392 lspci is a utility for displaying information about PCI buses in the
393 system and devices connected to them.
395 This version uses sysfs (/sys/bus/pci/devices) only.
400 #select PLATFORM_LINUX
402 lsusb is a utility for displaying information about USB buses in the
403 system and devices connected to them.
405 This version uses sysfs (/sys/bus/usb/devices) only.
411 The mkswap utility is used to configure a file or disk partition as
412 Linux swap space. This allows Linux to use the entire file or
413 partition as if it were additional RAM, which can greatly increase
414 the capability of low-memory machines. This additional memory is
415 much slower than real RAM, but can be very helpful at preventing your
416 applications being killed by the Linux out of memory (OOM) killer.
417 Once you have created swap space using 'mkswap' you need to enable
418 the swap space using the 'swapon' utility.
420 config FEATURE_MKSWAP_UUID
425 Generate swap spaces with universally unique identifiers.
431 more is a simple utility which allows you to read text one screen
432 sized page at a time. If you want to read text that is larger than
433 the screen, and you are using anything faster than a 300 baud modem,
434 you will probably find this utility very helpful. If you don't have
435 any need to reading text files, you can leave this disabled.
440 select PLATFORM_LINUX
442 All files and filesystems in Unix are arranged into one big directory
443 tree. The 'mount' utility is used to graft a filesystem onto a
444 particular part of the tree. A filesystem can either live on a block
445 device, or it can be accessible over the network, as is the case with
446 NFS filesystems. Most people using BusyBox will also want to enable
449 config FEATURE_MOUNT_FAKE
450 bool "Support option -f"
454 Enable support for faking a file system mount.
456 config FEATURE_MOUNT_VERBOSE
457 bool "Support option -v"
461 Enable multi-level -v[vv...] verbose messages. Useful if you
462 debug mount problems and want to see what is exactly passed
465 config FEATURE_MOUNT_HELPERS
466 bool "Support mount helpers"
470 Enable mounting of virtual file systems via external helpers.
471 E.g. "mount obexfs#-b00.11.22.33.44.55 /mnt" will in effect call
472 "obexfs -b00.11.22.33.44.55 /mnt"
473 Also "mount -t sometype [-o opts] fs /mnt" will try
474 "sometype [-o opts] fs /mnt" if simple mount syscall fails.
475 The idea is to use such virtual filesystems in /etc/fstab.
477 config FEATURE_MOUNT_LABEL
478 bool "Support specifying devices by label or UUID"
483 This allows for specifying a device by label or uuid, rather than by
484 name. This feature utilizes the same functionality as blkid/findfs.
485 This also enables label or uuid support for swapon.
487 config FEATURE_MOUNT_NFS
488 bool "Support mounting NFS file systems on Linux < 2.6.23"
491 select FEATURE_HAVE_RPC
492 select FEATURE_SYSLOG
494 Enable mounting of NFS file systems on Linux kernels prior
495 to version 2.6.23. Note that in this case mounting of NFS
496 over IPv6 will not be possible.
498 Note that this option links in RPC support from libc,
499 which is rather large (~10 kbytes on uclibc).
501 config FEATURE_MOUNT_CIFS
502 bool "Support mounting CIFS/SMB file systems"
506 Enable support for samba mounts.
508 config FEATURE_MOUNT_FLAGS
510 bool "Support lots of -o flags in mount"
513 Without this, mount only supports ro/rw/remount. With this, it
514 supports nosuid, suid, dev, nodev, exec, noexec, sync, async, atime,
515 noatime, diratime, nodiratime, loud, bind, move, shared, slave,
516 private, unbindable, rshared, rslave, rprivate, and runbindable.
518 config FEATURE_MOUNT_FSTAB
520 bool "Support /etc/fstab and -a"
523 Support mount all and looking for files in /etc/fstab.
528 select PLATFORM_LINUX
530 The pivot_root utility swaps the mount points for the root filesystem
531 with some other mounted filesystem. This allows you to do all sorts
532 of wild and crazy things with your Linux system and is far more
533 powerful than 'chroot'.
535 Note: This is for initrd in linux 2.4. Under initramfs (introduced
536 in linux 2.6) use switch_root instead.
542 The rdate utility allows you to synchronize the date and time of your
543 system clock with the date and time of a remote networked system using
544 the RFC868 protocol, which is built into the inetd daemon on most
551 Print the device node associated with the filesystem mounted at '/'.
556 #select PLATFORM_LINUX
558 This allows you to parse /proc/profile for basic profiling.
563 select PLATFORM_LINUX
565 Enter a system sleep state until specified wakeup time.
571 The script makes typescript of terminal session.
577 This program replays a typescript, using timing information
583 select PLATFORM_LINUX
585 The linux32 utility is used to create a 32bit environment for the
586 specified program (usually a shell). It only makes sense to have
587 this util on a system that supports both 64bit and 32bit userland
588 (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
593 select PLATFORM_LINUX
595 This option enables both the 'swapon' and the 'swapoff' utilities.
596 Once you have created some swap space using 'mkswap', you also need
597 to enable your swap space with the 'swapon' utility. The 'swapoff'
598 utility is used, typically at system shutdown, to disable any swap
599 space. If you are not using any swap space, you can leave this
602 config FEATURE_SWAPON_PRI
603 bool "Support priority option -p"
607 Enable support for setting swap device priority in swapon.
612 select PLATFORM_LINUX
614 The switch_root utility is used from initramfs to select a new
615 root device. Under initramfs, you have to use this instead of
616 pivot_root. (Stop reading here if you don't care why.)
618 Booting with initramfs extracts a gzipped cpio archive into rootfs
619 (which is a variant of ramfs/tmpfs). Because rootfs can't be moved
620 or unmounted*, pivot_root will not work from initramfs. Instead,
621 switch_root deletes everything out of rootfs (including itself),
622 does a mount --move that overmounts rootfs with the new root, and
623 then execs the specified init program.
625 * Because the Linux kernel uses rootfs internally as the starting
626 and ending point for searching through the kernel's doubly linked
627 list of active mount points. That's why.
632 select PLATFORM_LINUX
634 When you want to remove a mounted filesystem from its current mount
635 point, for example when you are shutting down the system, the
636 'umount' utility is the tool to use. If you enabled the 'mount'
637 utility, you almost certainly also want to enable 'umount'.
639 config FEATURE_UMOUNT_ALL
640 bool "Support option -a"
644 Support -a option to unmount all currently mounted filesystems.
646 comment "Common options for mount/umount"
647 depends on MOUNT || UMOUNT
649 config FEATURE_MOUNT_LOOP
650 bool "Support loopback mounts"
652 depends on MOUNT || UMOUNT
654 Enabling this feature allows automatic mounting of files (containing
655 filesystem images) via the linux kernel's loopback devices.
656 The mount command will detect you are trying to mount a file instead
657 of a block device, and transparently associate the file with a
658 loopback device. The umount command will also free that loopback
661 You can still use the 'losetup' utility (to manually associate files
662 with loop devices) if you need to do something advanced, such as
663 specify an offset or cryptographic options to the loopback device.
664 (If you don't want umount to free the loop device, use "umount -D".)
666 config FEATURE_MOUNT_LOOP_CREATE
667 bool "Create new loopback devices if needed"
669 depends on FEATURE_MOUNT_LOOP
671 Linux kernels >= 2.6.24 support unlimited loopback devices. They are
672 allocated for use when trying to use a loop device. The loop device
675 This feature lets mount to try to create next /dev/loopN device
676 if it does not find a free one.
678 config FEATURE_MTAB_SUPPORT
679 bool "Support for the old /etc/mtab file"
681 depends on MOUNT || UMOUNT
682 select FEATURE_MOUNT_FAKE
684 Historically, Unix systems kept track of the currently mounted
685 partitions in the file "/etc/mtab". These days, the kernel exports
686 the list of currently mounted partitions in "/proc/mounts", rendering
687 the old mtab file obsolete. (In modern systems, /etc/mtab should be
688 a symlink to /proc/mounts.)
690 The only reason to have mount maintain an /etc/mtab file itself is if
691 your stripped-down embedded system does not have a /proc directory.
692 If you must use this, keep in mind it's inherently brittle (for
693 example a mount under chroot won't update it), can't handle modern
694 features like separate per-process filesystem namespaces, requires
695 that your /etc directory be writable, tends to get easily confused
696 by --bind or --move mounts, won't update if you rename a directory
697 that contains a mount point, and so on. (In brief: avoid.)
699 About the only reason to use this is if you've removed /proc from
703 bool #No description makes it a hidden option
706 menu "Filesystem/Volume identification"
709 config FEATURE_VOLUMEID_EXT
710 bool "Ext filesystem"
716 config FEATURE_VOLUMEID_BTRFS
717 bool "btrfs filesystem"
723 config FEATURE_VOLUMEID_REISERFS
724 bool "Reiser filesystem"
730 config FEATURE_VOLUMEID_FAT
731 bool "fat filesystem"
737 config FEATURE_VOLUMEID_EXFAT
738 bool "exFAT filesystem"
742 exFAT (extended FAT) is a proprietary file system designed especially
743 for flash drives. It has many features from NTFS, but with less
744 overhead. exFAT is used on most SDXC cards for consumer electronics.
746 config FEATURE_VOLUMEID_HFS
747 bool "hfs filesystem"
753 config FEATURE_VOLUMEID_JFS
754 bool "jfs filesystem"
760 ### config FEATURE_VOLUMEID_UFS
761 ### bool "ufs filesystem"
763 ### depends on VOLUMEID
767 config FEATURE_VOLUMEID_XFS
768 bool "xfs filesystem"
774 config FEATURE_VOLUMEID_NILFS
775 bool "nilfs filesystem"
781 config FEATURE_VOLUMEID_NTFS
782 bool "ntfs filesystem"
788 config FEATURE_VOLUMEID_ISO9660
789 bool "iso9660 filesystem"
795 config FEATURE_VOLUMEID_UDF
796 bool "udf filesystem"
802 config FEATURE_VOLUMEID_LUKS
803 bool "luks filesystem"
809 config FEATURE_VOLUMEID_LINUXSWAP
810 bool "linux swap filesystem"
816 ### config FEATURE_VOLUMEID_LVM
819 ### depends on VOLUMEID
823 config FEATURE_VOLUMEID_CRAMFS
824 bool "cramfs filesystem"
830 ### config FEATURE_VOLUMEID_HPFS
831 ### bool "hpfs filesystem"
833 ### depends on VOLUMEID
837 config FEATURE_VOLUMEID_ROMFS
838 bool "romfs filesystem"
844 config FEATURE_VOLUMEID_SQUASHFS
845 bool "SquashFS filesystem"
847 depends on VOLUMEID && FEATURE_BLKID_TYPE
849 Squashfs is a compressed read-only filesystem for Linux. Squashfs is
850 intended for general read-only filesystem use and in constrained block
851 device/memory systems (e.g. embedded systems) where low overhead is
854 config FEATURE_VOLUMEID_SYSV
855 bool "sysv filesystem"
861 ### config FEATURE_VOLUMEID_MINIX
862 ### bool "minix filesystem"
864 ### depends on VOLUMEID
868 ### These only detect partition tables - not used (yet?)
869 ### config FEATURE_VOLUMEID_MAC
870 ### bool "mac filesystem"
872 ### depends on VOLUMEID
876 ### config FEATURE_VOLUMEID_MSDOS
877 ### bool "msdos filesystem"
879 ### depends on VOLUMEID
883 config FEATURE_VOLUMEID_OCFS2
884 bool "ocfs2 filesystem"
890 ### config FEATURE_VOLUMEID_HIGHPOINTRAID
891 ### bool "highpoint raid"
893 ### depends on VOLUMEID
897 ### config FEATURE_VOLUMEID_ISWRAID
898 ### bool "intel raid"
900 ### depends on VOLUMEID
904 ### config FEATURE_VOLUMEID_LSIRAID
907 ### depends on VOLUMEID
911 ### config FEATURE_VOLUMEID_VIARAID
914 ### depends on VOLUMEID
918 ### config FEATURE_VOLUMEID_SILICONRAID
919 ### bool "silicon raid"
921 ### depends on VOLUMEID
925 ### config FEATURE_VOLUMEID_NVIDIARAID
926 ### bool "nvidia raid"
928 ### depends on VOLUMEID
932 ### config FEATURE_VOLUMEID_PROMISERAID
933 ### bool "promise raid"
935 ### depends on VOLUMEID
939 config FEATURE_VOLUMEID_LINUXRAID