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 The minix filesystem is a nice, small, compact, read-write filesystem
255 with little overhead. If you wish to be able to create minix
256 filesystems this utility will do the job for you.
258 config FEATURE_MINIX2
259 bool "Support Minix fs v2 (fsck_minix/mkfs_minix)"
261 depends on FSCK_MINIX || MKFS_MINIX
263 If you wish to be able to create version 2 minix filesystems, enable
264 this. If you enabled 'mkfs_minix' then you almost certainly want to
265 be using the version 2 filesystem support.
270 select PLATFORM_LINUX
272 Utility to create ReiserFS filesystems.
273 Note: this applet needs a lot of testing and polishing.
279 The getopt utility is used to break up (parse) options in command
280 lines to make it easy to write complex shell scripts that also check
281 for legal (and illegal) options. If you want to write horribly
282 complex shell scripts, or use some horribly complex shell script
283 written by others, this utility may be for you. Most people will
284 wisely leave this disabled.
286 config FEATURE_GETOPT_LONG
287 bool "Support option -l"
288 default y if LONG_OPTS
291 Enable support for long options (option -l).
297 The hexdump utility is used to display binary data in a readable
298 way that is comparable to the output from most hex editors.
300 config FEATURE_HEXDUMP_REVERSE
301 bool "Support -R, reverse of 'hexdump -Cv'"
305 The hexdump utility is used to display binary data in an ascii
306 readable way. This option creates binary data from an ascii input.
307 NB: this option is non-standard. It's unwise to use it in scripts
308 aimed to be portable.
315 hd is an alias to hexdump -C.
320 select PLATFORM_LINUX
322 The hwclock utility is used to read and set the hardware clock
323 on a system. This is primarily used to set the current time on
324 shutdown in the hardware clock, so the hardware will keep the
325 correct time when Linux is _not_ running.
327 config FEATURE_HWCLOCK_LONG_OPTIONS
328 bool "Support long options (--hctosys,...)"
330 depends on HWCLOCK && LONG_OPTS
332 By default, the hwclock utility only uses short options. If you
333 are overly fond of its long options, such as --hctosys, --utc, etc)
334 then enable this option.
336 config FEATURE_HWCLOCK_ADJTIME_FHS
337 bool "Use FHS /var/lib/hwclock/adjtime"
338 default n # util-linux-ng in Fedora 13 still uses /etc/adjtime
341 Starting with FHS 2.3, the adjtime state file is supposed to exist
342 at /var/lib/hwclock/adjtime instead of /etc/adjtime. If you wish
343 to use the FHS behavior, answer Y here, otherwise answer N for the
344 classic /etc/adjtime path.
346 pathname.com/fhs/pub/fhs-2.3.html#VARLIBHWCLOCKSTATEDIRECTORYFORHWCLO
352 The ipcrm utility allows the removal of System V interprocess
353 communication (IPC) objects and the associated data structures
359 select PLATFORM_LINUX
361 The ipcs utility is used to provide information on the currently
362 allocated System V interprocess (IPC) objects in the system.
367 select PLATFORM_LINUX
369 losetup is used to associate or detach a loop device with a regular
370 file or block device, and to query the status of a loop device. This
371 version does not currently support enabling data encryption.
376 #select PLATFORM_LINUX
378 lspci is a utility for displaying information about PCI buses in the
379 system and devices connected to them.
381 This version uses sysfs (/sys/bus/pci/devices) only.
386 #select PLATFORM_LINUX
388 lsusb is a utility for displaying information about USB buses in the
389 system and devices connected to them.
391 This version uses sysfs (/sys/bus/usb/devices) only.
397 The mkswap utility is used to configure a file or disk partition as
398 Linux swap space. This allows Linux to use the entire file or
399 partition as if it were additional RAM, which can greatly increase
400 the capability of low-memory machines. This additional memory is
401 much slower than real RAM, but can be very helpful at preventing your
402 applications being killed by the Linux out of memory (OOM) killer.
403 Once you have created swap space using 'mkswap' you need to enable
404 the swap space using the 'swapon' utility.
406 config FEATURE_MKSWAP_UUID
411 Generate swap spaces with universally unique identifiers.
417 more is a simple utility which allows you to read text one screen
418 sized page at a time. If you want to read text that is larger than
419 the screen, and you are using anything faster than a 300 baud modem,
420 you will probably find this utility very helpful. If you don't have
421 any need to reading text files, you can leave this disabled.
426 select PLATFORM_LINUX
428 The pivot_root utility swaps the mount points for the root filesystem
429 with some other mounted filesystem. This allows you to do all sorts
430 of wild and crazy things with your Linux system and is far more
431 powerful than 'chroot'.
433 Note: This is for initrd in linux 2.4. Under initramfs (introduced
434 in linux 2.6) use switch_root instead.
440 The rdate utility allows you to synchronize the date and time of your
441 system clock with the date and time of a remote networked system using
442 the RFC868 protocol, which is built into the inetd daemon on most
449 Print the device node associated with the filesystem mounted at '/'.
454 #select PLATFORM_LINUX
456 This allows you to parse /proc/profile for basic profiling.
461 select PLATFORM_LINUX
463 Enter a system sleep state until specified wakeup time.
469 The script makes typescript of terminal session.
475 This program replays a typescript, using timing information
481 select PLATFORM_LINUX
483 The switch_root utility is used from initramfs to select a new
484 root device. Under initramfs, you have to use this instead of
485 pivot_root. (Stop reading here if you don't care why.)
487 Booting with initramfs extracts a gzipped cpio archive into rootfs
488 (which is a variant of ramfs/tmpfs). Because rootfs can't be moved
489 or unmounted*, pivot_root will not work from initramfs. Instead,
490 switch_root deletes everything out of rootfs (including itself),
491 does a mount --move that overmounts rootfs with the new root, and
492 then execs the specified init program.
494 * Because the Linux kernel uses rootfs internally as the starting
495 and ending point for searching through the kernel's doubly linked
496 list of active mount points. That's why.
501 select PLATFORM_LINUX
503 When you want to remove a mounted filesystem from its current mount
504 point, for example when you are shutting down the system, the
505 'umount' utility is the tool to use. If you enabled the 'mount'
506 utility, you almost certainly also want to enable 'umount'.
508 config FEATURE_UMOUNT_ALL
509 bool "Support option -a"
513 Support -a option to unmount all currently mounted filesystems.
515 comment "Common options for mount/umount"
516 depends on MOUNT || UMOUNT
518 config FEATURE_MOUNT_LOOP
519 bool "Support loopback mounts"
521 depends on MOUNT || UMOUNT
523 Enabling this feature allows automatic mounting of files (containing
524 filesystem images) via the linux kernel's loopback devices.
525 The mount command will detect you are trying to mount a file instead
526 of a block device, and transparently associate the file with a
527 loopback device. The umount command will also free that loopback
530 You can still use the 'losetup' utility (to manually associate files
531 with loop devices) if you need to do something advanced, such as
532 specify an offset or cryptographic options to the loopback device.
533 (If you don't want umount to free the loop device, use "umount -D".)
535 config FEATURE_MOUNT_LOOP_CREATE
536 bool "Create new loopback devices if needed"
538 depends on FEATURE_MOUNT_LOOP
540 Linux kernels >= 2.6.24 support unlimited loopback devices. They are
541 allocated for use when trying to use a loop device. The loop device
544 This feature lets mount to try to create next /dev/loopN device
545 if it does not find a free one.
547 config FEATURE_MTAB_SUPPORT
548 bool "Support for the old /etc/mtab file"
550 depends on MOUNT || UMOUNT
551 select FEATURE_MOUNT_FAKE
553 Historically, Unix systems kept track of the currently mounted
554 partitions in the file "/etc/mtab". These days, the kernel exports
555 the list of currently mounted partitions in "/proc/mounts", rendering
556 the old mtab file obsolete. (In modern systems, /etc/mtab should be
557 a symlink to /proc/mounts.)
559 The only reason to have mount maintain an /etc/mtab file itself is if
560 your stripped-down embedded system does not have a /proc directory.
561 If you must use this, keep in mind it's inherently brittle (for
562 example a mount under chroot won't update it), can't handle modern
563 features like separate per-process filesystem namespaces, requires
564 that your /etc directory be writable, tends to get easily confused
565 by --bind or --move mounts, won't update if you rename a directory
566 that contains a mount point, and so on. (In brief: avoid.)
568 About the only reason to use this is if you've removed /proc from
571 source util-linux/volume_id/Config.in