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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 DMESG | ||
9 | bool "dmesg" | ||
10 | default n | ||
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 FEATURE_DMESG_PRETTY | ||
21 | bool "pretty dmesg output" | ||
22 | default y | ||
23 | depends on 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 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 FEATURE_FBSET_FANCY | ||
50 | bool "Turn on extra fbset options" | ||
51 | default n | ||
52 | depends on 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 FEATURE_FBSET_READMODE | ||
60 | bool "Turn on fbset readmode support" | ||
61 | default n | ||
62 | depends on FBSET | ||
63 | help | ||
64 | This option allows fbset to read the video mode database stored by | ||
65 | default as /etc/fb.modes, which can be used to set frame buffer | ||
66 | device to pre-defined video modes. | ||
67 | |||
68 | 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 FDFORMAT | ||
81 | bool "fdformat" | ||
82 | default n | ||
83 | help | ||
84 | fdformat is used to low-level format a floppy disk. | ||
85 | |||
86 | 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 FDISK_SUPPORT_LARGE_DISKS | ||
96 | bool "support over 4GB disks" | ||
97 | default y | ||
98 | depends on FDISK | ||
99 | help | ||
100 | Enable this option to support large disks > 4GB. | ||
101 | |||
102 | config FEATURE_FDISK_WRITABLE | ||
103 | bool "Write support" | ||
104 | default y | ||
105 | depends on 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 FEATURE_AIX_LABEL | ||
112 | bool "Support AIX disklabels" | ||
113 | default n | ||
114 | depends on FDISK && 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 FEATURE_SGI_LABEL | ||
120 | bool "Support SGI disklabels" | ||
121 | default n | ||
122 | depends on FDISK && 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 FEATURE_SUN_LABEL | ||
128 | bool "Support SUN disklabels" | ||
129 | default n | ||
130 | depends on FDISK && 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 FEATURE_OSF_LABEL | ||
136 | bool "Support BSD disklabels" | ||
137 | default n | ||
138 | depends on FDISK && 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 FEATURE_FDISK_ADVANCED | ||
144 | bool "Support expert mode" | ||
145 | default n | ||
146 | depends on FDISK && 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 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 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 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 FSCK_MINIX || MKFS_MINIX | ||
185 | |||
186 | config FEATURE_MINIX2 | ||
187 | bool "Support Minix fs v2 (fsck_minix/mkfs_minix)" | ||
188 | default y | ||
189 | depends on FSCK_MINIX || 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 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 HEXDUMP | ||
207 | bool "hexdump" | ||
208 | default n | ||
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 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 FEATURE_HWCLOCK_LONG_OPTIONS | ||
223 | bool "Support long options (--hctosys,...)" | ||
224 | default n | ||
225 | depends on HWCLOCK && 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 FEATURE_HWCLOCK_ADJTIME_FHS | ||
232 | bool "Use FHS /var/lib/hwclock/adjtime" | ||
233 | default y | ||
234 | depends on 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 IPCRM | ||
244 | bool "ipcrm" | ||
245 | default n | ||
246 | select 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 IPCS | ||
253 | bool "ipcs" | ||
254 | default n | ||
255 | select 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 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 MDEV | ||
269 | bool "mdev" | ||
270 | default n | ||
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 FEATURE_MDEV_CONF | ||
278 | bool "Support /etc/mdev.conf" | ||
279 | default n | ||
280 | depends on 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 FEATURE_MDEV_EXEC | ||
293 | bool "Support command execution at device addition/removal" | ||
294 | default n | ||
295 | depends on 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 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 FEATURE_MKSWAP_V0 | ||
327 | bool "version 0 support" | ||
328 | default n | ||
329 | depends on MKSWAP | ||
330 | # depends on MKSWAP && 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 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 FEATURE_USE_TERMIOS | ||
347 | bool "Use termios to manipulate the screen" | ||
348 | default y | ||
349 | depends on 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 MOUNT | ||
358 | bool "mount" | ||
359 | default n | ||
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 FEATURE_MOUNT_NFS | ||
369 | bool "Support mounting NFS file systems" | ||
370 | default n | ||
371 | depends on MOUNT | ||
372 | depends on FEATURE_HAVE_RPC | ||
373 | select FEATURE_SYSLOG | ||
374 | help | ||
375 | Enable mounting of NFS file systems. | ||
376 | |||
377 | config FEATURE_MOUNT_CIFS | ||
378 | bool "Support mounting CIFS/SMB file systems" | ||
379 | default n | ||
380 | depends on MOUNT | ||
381 | help | ||
382 | Enable support for samba mounts. | ||
383 | |||
384 | config FEATURE_MOUNT_FLAGS | ||
385 | depends on 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 FEATURE_MOUNT_FSTAB | ||
395 | depends on 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 PIVOT_ROOT | ||
402 | bool "pivot_root" | ||
403 | default n | ||
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 RDATE | ||
414 | bool "rdate" | ||
415 | default n | ||
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 READPROFILE | ||
423 | bool "readprofile" | ||
424 | default n | ||
425 | help | ||
426 | This allows you to parse /proc/profile for basic profiling. | ||
427 | |||
428 | 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 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 SWITCH_ROOT | ||
449 | bool "switch_root" | ||
450 | default n | ||
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 UMOUNT | ||
468 | bool "umount" | ||
469 | default n | ||
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 FEATURE_UMOUNT_ALL | ||
477 | bool "umount -a option" | ||
478 | default n | ||
479 | depends on UMOUNT | ||
480 | help | ||
481 | Support -a option to unmount all currently mounted filesystems. | ||
482 | |||
483 | comment "Common options for mount/umount" | ||
484 | depends on MOUNT || UMOUNT | ||
485 | |||
486 | config FEATURE_MOUNT_LOOP | ||
487 | bool "Support loopback mounts" | ||
488 | default n | ||
489 | depends on MOUNT || 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 FEATURE_MTAB_SUPPORT | ||
503 | bool "Support for the old /etc/mtab file" | ||
504 | default n | ||
505 | depends on MOUNT || 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 | |||