source: drbl_ui/backup/test_busybox/busybox-1.7.2/util-linux/Config.in @ 175

Last change on this file since 175 was 20, checked in by chris, 17 years ago
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Line 
1#
2# For a description of the syntax of this configuration file,
3# see scripts/kbuild/config-language.txt.
4#
5
6menu "Linux System Utilities"
7
8config 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
20config 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
40config 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
49config 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
59config 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
68config 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
80config FDFORMAT
81  bool "fdformat"
82  default n
83  help
84    fdformat is used to low-level format a floppy disk.
85
86config 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
95config 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
102config 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
111config 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
119config 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
127config 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
135config 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
143config 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
153config 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
164config 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
175config 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
183comment "Minix filesystem support"
184  depends on FSCK_MINIX || MKFS_MINIX
185
186config 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
195config 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
206config 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
213config 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
222config 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
231config 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
243config 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
252config 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
260config 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
268config MDEV
269  bool "mdev"
270  default n
271  help
272    mdev is a mini-udev implementation for dynamically creating device
273    nodes in the /dev directory.
274
275    For more information, please see docs/mdev.txt
276
277config FEATURE_MDEV_CONF
278  bool "Support /etc/mdev.conf"
279  default n
280  depends on MDEV
281  help
282    Add support for the mdev config file to control ownership and
283    permissions of the device nodes.
284
285    For more information, please see docs/mdev.txt
286
287config FEATURE_MDEV_EXEC
288  bool "Support command execution at device addition/removal"
289  default n
290  depends on FEATURE_MDEV_CONF
291  help
292    This adds support for an optional field to /etc/mdev.conf for
293    executing commands when devices are created/removed.
294
295    For more information, please see docs/mdev.txt
296
297config FEATURE_MDEV_LOAD_FIRMWARE
298  bool "Support loading of firmwares"
299  default n
300  depends on MDEV
301  help
302    Some devices need to load firmware before they can be usable.
303
304    These devices will request userspace look up the files in
305    /lib/firmware/ and if it exists, send it to the kernel for
306    loading into the hardware.
307
308config MKSWAP
309  bool "mkswap"
310  default n
311  help
312    The mkswap utility is used to configure a file or disk partition as
313    Linux swap space.  This allows Linux to use the entire file or
314    partition as if it were additional RAM, which can greatly increase
315    the capability of low-memory machines.  This additional memory is
316    much slower than real RAM, but can be very helpful at preventing your
317    applications being killed by the Linux out of memory (OOM) killer.
318    Once you have created swap space using 'mkswap' you need to enable
319    the swap space using the 'swapon' utility.
320
321config FEATURE_MKSWAP_V0
322  bool "version 0 support"
323  default n
324  depends on MKSWAP
325# depends on MKSWAP && DEPRECATED
326  help
327    Enable support for the old v0 style.
328    If your kernel is older than 2.1.117, then v0 support is the
329    only option.
330
331config MORE
332  bool "more"
333  default n
334  help
335    more is a simple utility which allows you to read text one screen
336    sized page at a time.  If you want to read text that is larger than
337    the screen, and you are using anything faster than a 300 baud modem,
338    you will probably find this utility very helpful.  If you don't have
339    any need to reading text files, you can leave this disabled.
340
341config FEATURE_USE_TERMIOS
342  bool "Use termios to manipulate the screen"
343  default y
344  depends on MORE
345  help
346    This option allows utilities such as 'more' and 'top' to determine
347    the size of the screen.  If you leave this disabled, your utilities
348    that display things on the screen will be especially primitive and
349    will be unable to determine the current screen size, and will be
350    unable to move the cursor.
351
352config MOUNT
353  bool "mount"
354  default n
355  help
356    All files and filesystems in Unix are arranged into one big directory
357    tree.  The 'mount' utility is used to graft a filesystem onto a
358    particular part of the tree.  A filesystem can either live on a block
359    device, or it can be accessible over the network, as is the case with
360    NFS filesystems.  Most people using BusyBox will also want to enable
361    the 'mount' utility.
362
363config FEATURE_MOUNT_NFS
364  bool "Support mounting NFS file systems"
365  default n
366  depends on MOUNT
367  select FEATURE_HAVE_RPC
368  select FEATURE_SYSLOG
369  help
370    Enable mounting of NFS file systems.
371
372config FEATURE_MOUNT_CIFS
373  bool "Support mounting CIFS/SMB file systems"
374  default n
375  depends on MOUNT
376  help
377    Enable support for samba mounts.
378
379config FEATURE_MOUNT_FLAGS
380  depends on MOUNT
381  bool "Support lots of -o flags in mount"
382  default y
383  help
384    Without this, mount only supports ro/rw/remount.  With this, it
385    supports nosuid, suid, dev, nodev, exec, noexec, sync, async, atime,
386    noatime, diratime, nodiratime, loud, bind, move, shared, slave,
387    private, unbindable, rshared, rslave, rprivate, and runbindable.
388
389config FEATURE_MOUNT_FSTAB
390  depends on MOUNT
391  bool "Support /etc/fstab and -a"
392  default y
393  help
394    Support mount all and looking for files in /etc/fstab.
395
396config PIVOT_ROOT
397  bool "pivot_root"
398  default n
399  help
400    The pivot_root utility swaps the mount points for the root filesystem
401    with some other mounted filesystem.  This allows you to do all sorts
402    of wild and crazy things with your Linux system and is far more
403    powerful than 'chroot'.
404
405    Note: This is for initrd in linux 2.4.  Under initramfs (introduced
406    in linux 2.6) use switch_root instead.
407
408config RDATE
409  bool "rdate"
410  default n
411  help
412    The rdate utility allows you to synchronize the date and time of your
413    system clock with the date and time of a remote networked system using
414    the RFC868 protocol, which is built into the inetd daemon on most
415    systems.
416
417config READPROFILE
418  bool "readprofile"
419  default n
420  help
421    This allows you to parse /proc/profile for basic profiling.
422
423config SETARCH
424  bool "setarch"
425  default n
426  help
427    The linux32 utility is used to create a 32bit environment for the
428    specified program (usually a shell).  It only makes sense to have
429    this util on a system that supports both 64bit and 32bit userland
430    (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
431
432config SWAPONOFF
433  bool "swaponoff"
434  default n
435  help
436    This option enables both the 'swapon' and the 'swapoff' utilities.
437    Once you have created some swap space using 'mkswap', you also need
438    to enable your swap space with the 'swapon' utility.  The 'swapoff'
439    utility is used, typically at system shutdown, to disable any swap
440    space.  If you are not using any swap space, you can leave this
441    option disabled.
442
443config SWITCH_ROOT
444  bool "switch_root"
445  default n
446  help
447    The switch_root utility is used from initramfs to select a new
448    root device.  Under initramfs, you have to use this instead of
449    pivot_root.  (Stop reading here if you don't care why.)
450
451    Booting with initramfs extracts a gzipped cpio archive into rootfs
452    (which is a variant of ramfs/tmpfs).  Because rootfs can't be moved
453    or unmounted*, pivot_root will not work from initramfs.  Instead,
454    switch_root deletes everything out of rootfs (including itself),
455    does a mount --move that overmounts rootfs with the new root, and
456    then execs the specified init program.
457
458    * Because the Linux kernel uses rootfs internally as the starting
459    and ending point for searching through the kernel's doubly linked
460    list of active mount points.  That's why.
461
462config UMOUNT
463  bool "umount"
464  default n
465  help
466    When you want to remove a mounted filesystem from its current mount point,
467    for example when you are shutting down the system, the 'umount' utility is
468    the tool to use.  If you enabled the 'mount' utility, you almost certainly
469    also want to enable 'umount'.
470
471config FEATURE_UMOUNT_ALL
472  bool "umount -a option"
473  default n
474  depends on UMOUNT
475  help
476    Support -a option to unmount all currently mounted filesystems.
477
478comment "Common options for mount/umount"
479  depends on MOUNT || UMOUNT
480
481config FEATURE_MOUNT_LOOP
482  bool "Support loopback mounts"
483  default n
484  depends on MOUNT || UMOUNT
485  help
486    Enabling this feature allows automatic mounting of files (containing
487    filesystem images) via the linux kernel's loopback devices.  The mount
488    command will detect you are trying to mount a file instead of a block
489    device, and transparently associate the file with a loopback device.
490    The umount command will also free that loopback device.
491
492    You can still use the 'losetup' utility (to manually associate files
493    with loop devices) if you need to do something advanced, such as
494    specify an offset or cryptographic options to the loopback device.
495    (If you don't want umount to free the loop device, use "umount -D".)
496
497config FEATURE_MTAB_SUPPORT
498  bool "Support for the old /etc/mtab file"
499  default n
500  depends on MOUNT || UMOUNT
501  help
502    Historically, Unix systems kept track of the currently mounted
503    partitions in the file "/etc/mtab".  These days, the kernel exports
504    the list of currently mounted partitions in "/proc/mounts", rendering
505    the old mtab file obsolete.  (In modern systems, /etc/mtab should be
506    a symlink to /proc/mounts.)
507
508    The only reason to have mount maintain an /etc/mtab file itself is if
509    your stripped-down embedded system does not have a /proc directory.
510    If you must use this, keep in mind it's inherently brittle (for
511    example a mount under chroot won't update it), can't handle modern
512    features like separate per-process filesystem namespaces, requires
513    that your /etc directory be writeable, tends to get easily confused
514    by --bind or --move mounts, won't update if you rename a directory
515    that contains a mount point, and so on.  (In brief: avoid.)
516
517    About the only reason to use this is if you've removed /proc from
518    your kernel.
519
520endmenu
521
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