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gerrit.nordix.org / codeaurora / busybox / dcb3fcb042612bfbb311a488379c65024bafd52b / . / util-linux / Config.in
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Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]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
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]8config DMESG
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]9 bool "dmesg"
10 default n
11 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]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.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]19
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]20config FEATURE_DMESG_PRETTY
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000[diff] [blame]21 bool "Pretty dmesg output"
Rob Landley446129a2006-07-27 16:40:55 +0000[diff] [blame]22 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]23 depends on DMESG
Rob Landley446129a2006-07-27 16:40:55 +0000[diff] [blame]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
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]40config FBSET
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]41 bool "fbset"
42 default n
43 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]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
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]46 interface to access a graphics display. Enable this option
47 if you wish to enable the 'fbset' utility.
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]48
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]49config FEATURE_FBSET_FANCY
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]50 bool "Turn on extra fbset options"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]51 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]52 depends on FBSET
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]53 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]54 This option enables extended fbset options, allowing one to set the
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]55 framebuffer size, color depth, etc. interface to access a graphics
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]56 display. Enable this option if you wish to enable extended fbset
57 options.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]58
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]59config FEATURE_FBSET_READMODE
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]60 bool "Turn on fbset readmode support"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]61 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]62 depends on FBSET
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]63 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]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.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]67
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]68config FDFLUSH
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]69 bool "fdflush"
70 default n
71 help
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]72 fdflush is only needed when changing media on slightly-broken
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]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
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]78 leave this disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]79
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]80config FDFORMAT
Eric Andersen01c3d402003-07-05 07:51:31 +0000[diff] [blame]81 bool "fdformat"
82 default n
83 help
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]84 fdformat is used to low-level format a floppy disk.
Eric Andersen01c3d402003-07-05 07:51:31 +0000[diff] [blame]85
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]86config FDISK
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]87 bool "fdisk"
88 default n
89 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]90 The fdisk utility is used to divide hard disks into one or more
91 logical disks, which are generally called partitions. This utility
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000[diff] [blame]92 can be used to list and edit the set of partitions or BSD style
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]93 'disk slices' that are defined on a hard drive.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]94
Eric Andersen84bdea82004-05-19 10:49:17 +0000[diff] [blame]95config FDISK_SUPPORT_LARGE_DISKS
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000[diff] [blame]96 bool "Support over 4GB disks"
Eric Andersen84bdea82004-05-19 10:49:17 +0000[diff] [blame]97 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]98 depends on FDISK
Eric Andersen84bdea82004-05-19 10:49:17 +0000[diff] [blame]99 help
100 Enable this option to support large disks > 4GB.
101
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]102config FEATURE_FDISK_WRITABLE
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]103 bool "Write support"
Glenn L McGrath4dcc2dd2003-01-04 11:56:06 +0000[diff] [blame]104 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]105 depends on FDISK
Glenn L McGrath4dcc2dd2003-01-04 11:56:06 +0000[diff] [blame]106 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]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.
Glenn L McGrath4dcc2dd2003-01-04 11:56:06 +0000[diff] [blame]110
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]111config FEATURE_AIX_LABEL
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]112 bool "Support AIX disklabels"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]113 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]114 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]115 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]116 Enabling this option allows you to create or change AIX disklabels.
117 Most people can safely leave this option disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]118
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]119config FEATURE_SGI_LABEL
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]120 bool "Support SGI disklabels"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]121 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]122 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]123 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]124 Enabling this option allows you to create or change SGI disklabels.
125 Most people can safely leave this option disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]126
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]127config FEATURE_SUN_LABEL
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]128 bool "Support SUN disklabels"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]129 default n
Mike Frysinger71a6a4e2007-01-24 08:24:43 +0000[diff] [blame]130 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]131 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]132 Enabling this option allows you to create or change SUN disklabels.
133 Most people can safely leave this option disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]134
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]135config FEATURE_OSF_LABEL
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]136 bool "Support BSD disklabels"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]137 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]138 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]139 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]140 Enabling this option allows you to create or change BSD disklabels
141 and define and edit BSD disk slices.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]142
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]143config FEATURE_FDISK_ADVANCED
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]144 bool "Support expert mode"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]145 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]146 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]147 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]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.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]152
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]153config FINDFS
154 bool "findfs"
155 default n
156 select VOLUMEID
157 help
158 This is similar to the findfs program that is part of the e2fsprogs
159 package. However, the e2fsprogs version only support ext2/3. This
160 version supports those in addition to FAT, swap, and ReiserFS.
161 WARNING:
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]162 With all submodules selected, it will add ~8k to busybox.
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]163
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]164config FREERAMDISK
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]165 bool "freeramdisk"
166 default n
167 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]168 Linux allows you to create ramdisks. This utility allows you to
169 delete them and completely free all memory that was used for the
170 ramdisk. For example, if you boot Linux into a ramdisk and later
171 pivot_root, you may want to free the memory that is allocated to the
172 ramdisk. If you have no use for freeing memory from a ramdisk, leave
173 this disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]174
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]175config FSCK_MINIX
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]176 bool "fsck_minix"
177 default n
178 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]179 The minix filesystem is a nice, small, compact, read-write filesystem
180 with little overhead. It is not a journaling filesystem however and
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]181 can experience corruption if it is not properly unmounted or if the
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]182 power goes off in the middle of a write. This utility allows you to
183 check for and attempt to repair any corruption that occurs to a minix
184 filesystem.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]185
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]186config MKFS_MINIX
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]187 bool "mkfs_minix"
188 default n
189 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]190 The minix filesystem is a nice, small, compact, read-write filesystem
191 with little overhead. If you wish to be able to create minix filesystems
192 this utility will do the job for you.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]193
194comment "Minix filesystem support"
Mike Frysinger71a6a4e2007-01-24 08:24:43 +0000[diff] [blame]195 depends on FSCK_MINIX || MKFS_MINIX
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]196
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]197config FEATURE_MINIX2
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]198 bool "Support Minix fs v2 (fsck_minix/mkfs_minix)"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]199 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]200 depends on FSCK_MINIX || MKFS_MINIX
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]201 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]202 If you wish to be able to create version 2 minix filesystems, enable this.
203 If you enabled 'mkfs_minix' then you almost certainly want to be using the
204 version 2 filesystem support.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]205
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]206config GETOPT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]207 bool "getopt"
208 default n
209 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]210 The getopt utility is used to break up (parse) options in command
211 lines to make it easy to write complex shell scripts that also check
212 for legal (and illegal) options. If you want to write horribly
213 complex shell scripts, or use some horribly complex shell script
214 written by others, this utility may be for you. Most people will
215 wisely leave this disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]216
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]217config HEXDUMP
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]218 bool "hexdump"
219 default n
220 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]221 The hexdump utility is used to display binary data in a readable
222 way that is comparable to the output from most hex editors.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]223
Denis Vlasenkofbe5f392007-11-18 05:36:50 +0000[diff] [blame]224config FEATURE_HEXDUMP_REVERSE
225 bool "Support -R, reverse of 'hexdump -Cv'"
226 default n
227 depends on HEXDUMP
228 help
229 The hexdump utility is used to display binary data in an ascii
230 readable way. This option creates binary data from an ascii input.
231 NB: this option is non-standard. It's unwise to use it in scripts
232 aimed to be portable.
233
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000[diff] [blame]234config HD
235 bool "hd"
236 default n
237 select HEXDUMP
238 help
239 hd is an alias to hexdump -C.
240
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]241config HWCLOCK
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]242 bool "hwclock"
243 default n
244 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]245 The hwclock utility is used to read and set the hardware clock
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]246 on a system. This is primarily used to set the current time on
247 shutdown in the hardware clock, so the hardware will keep the
248 correct time when Linux is _not_ running.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]249
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]250config FEATURE_HWCLOCK_LONG_OPTIONS
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]251 bool "Support long options (--hctosys,...)"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]252 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]253 depends on HWCLOCK && GETOPT_LONG
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]254 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]255 By default, the hwclock utility only uses short options. If you
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]256 are overly fond of its long options, such as --hctosys, --utc, etc)
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]257 then enable this option.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]258
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]259config FEATURE_HWCLOCK_ADJTIME_FHS
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]260 bool "Use FHS /var/lib/hwclock/adjtime"
Mike Frysinger747fc5d2005-09-28 03:21:21 +0000[diff] [blame]261 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]262 depends on HWCLOCK
Mike Frysinger747fc5d2005-09-28 03:21:21 +0000[diff] [blame]263 help
264 Starting with FHS 2.3, the adjtime state file is supposed to exist
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame]265 at /var/lib/hwclock/adjtime instead of /etc/adjtime. If you wish
Mike Frysinger747fc5d2005-09-28 03:21:21 +0000[diff] [blame]266 to use the FHS behavior, answer Y here, otherwise answer N for the
267 classic /etc/adjtime path.
268
269 http://www.pathname.com/fhs/pub/fhs-2.3.html#VARLIBHWCLOCKSTATEDIRECTORYFORHWCLO
270
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]271config IPCRM
Rob Landley6eb1e412005-06-20 04:30:36 +0000[diff] [blame]272 bool "ipcrm"
273 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]274 select FEATURE_SUID
Rob Landley6eb1e412005-06-20 04:30:36 +0000[diff] [blame]275 help
276 The ipcrm utility allows the removal of System V interprocess
277 communication (IPC) objects and the associated data structures
278 from the system.
279
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]280config IPCS
Rob Landley6eb1e412005-06-20 04:30:36 +0000[diff] [blame]281 bool "ipcs"
282 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]283 select FEATURE_SUID
Rob Landley6eb1e412005-06-20 04:30:36 +0000[diff] [blame]284 help
285 The ipcs utility is used to provide information on the currently
286 allocated System V interprocess (IPC) objects in the system.
287
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]288config LOSETUP
Mike Frysinger75aa1922005-09-24 23:12:38 +0000[diff] [blame]289 bool "losetup"
290 default n
291 help
292 losetup is used to associate or detach a loop device with a regular
293 file or block device, and to query the status of a loop device. This
294 version does not currently support enabling data encryption.
295
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]296config MDEV
Rob Landley70f7ef72005-12-13 08:21:33 +0000[diff] [blame]297 bool "mdev"
298 default n
299 help
Mike Frysingerae302102007-02-14 13:20:29 +0000[diff] [blame]300 mdev is a mini-udev implementation for dynamically creating device
301 nodes in the /dev directory.
302
303 For more information, please see docs/mdev.txt
Rob Landley70f7ef72005-12-13 08:21:33 +0000[diff] [blame]304
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]305config FEATURE_MDEV_CONF
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]306 bool "Support /etc/mdev.conf"
Rob Landley70f7ef72005-12-13 08:21:33 +0000[diff] [blame]307 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]308 depends on MDEV
Rob Landley70f7ef72005-12-13 08:21:33 +0000[diff] [blame]309 help
Mike Frysingerae302102007-02-14 13:20:29 +0000[diff] [blame]310 Add support for the mdev config file to control ownership and
311 permissions of the device nodes.
Rob Landley70f7ef72005-12-13 08:21:33 +0000[diff] [blame]312
Mike Frysingerae302102007-02-14 13:20:29 +0000[diff] [blame]313 For more information, please see docs/mdev.txt
Rob Landley70f7ef72005-12-13 08:21:33 +0000[diff] [blame]314
Mike Frysingerf0044c42008-02-01 06:53:50 +0000[diff] [blame]315config FEATURE_MDEV_RENAME
316 bool "Support subdirs/symlinks"
317 default n
318 depends on FEATURE_MDEV_CONF
319 help
320 Add support for renaming devices and creating symlinks.
321
322 For more information, please see docs/mdev.txt
323
Denis Vlasenkof2f38682008-03-29 17:26:10 +0000[diff] [blame]324config FEATURE_MDEV_RENAME_REGEXP
325 bool "Support regular expressions substitutions when renaming device"
326 default n
327 depends on FEATURE_MDEV_RENAME
328 help
329 Add support for regular expressions substitutions when renaming device.
330
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]331config FEATURE_MDEV_EXEC
Rob Landleyef10d522006-06-26 14:11:33 +0000[diff] [blame]332 bool "Support command execution at device addition/removal"
333 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]334 depends on FEATURE_MDEV_CONF
Rob Landleyef10d522006-06-26 14:11:33 +0000[diff] [blame]335 help
Mike Frysingerae302102007-02-14 13:20:29 +0000[diff] [blame]336 This adds support for an optional field to /etc/mdev.conf for
337 executing commands when devices are created/removed.
Rob Landleyef10d522006-06-26 14:11:33 +0000[diff] [blame]338
Mike Frysingerae302102007-02-14 13:20:29 +0000[diff] [blame]339 For more information, please see docs/mdev.txt
Rob Landleyef10d522006-06-26 14:11:33 +0000[diff] [blame]340
Mike Frysingera78ef2c2007-06-13 07:34:15 +0000[diff] [blame]341config FEATURE_MDEV_LOAD_FIRMWARE
342 bool "Support loading of firmwares"
343 default n
344 depends on MDEV
345 help
346 Some devices need to load firmware before they can be usable.
347
348 These devices will request userspace look up the files in
349 /lib/firmware/ and if it exists, send it to the kernel for
350 loading into the hardware.
351
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]352config MKSWAP
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]353 bool "mkswap"
354 default n
355 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]356 The mkswap utility is used to configure a file or disk partition as
357 Linux swap space. This allows Linux to use the entire file or
358 partition as if it were additional RAM, which can greatly increase
359 the capability of low-memory machines. This additional memory is
360 much slower than real RAM, but can be very helpful at preventing your
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]361 applications being killed by the Linux out of memory (OOM) killer.
362 Once you have created swap space using 'mkswap' you need to enable
363 the swap space using the 'swapon' utility.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]364
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]365config FEATURE_MKSWAP_V0
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000[diff] [blame]366 bool "Version 0 support"
Bernhard Reutner-Fischer56dd0bf2006-03-29 17:32:24 +0000[diff] [blame]367 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]368 depends on MKSWAP
369# depends on MKSWAP && DEPRECATED
Bernhard Reutner-Fischer56dd0bf2006-03-29 17:32:24 +0000[diff] [blame]370 help
371 Enable support for the old v0 style.
372 If your kernel is older than 2.1.117, then v0 support is the
373 only option.
374
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]375config MORE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]376 bool "more"
377 default n
378 help
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]379 more is a simple utility which allows you to read text one screen
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]380 sized page at a time. If you want to read text that is larger than
381 the screen, and you are using anything faster than a 300 baud modem,
382 you will probably find this utility very helpful. If you don't have
383 any need to reading text files, you can leave this disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]384
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]385config FEATURE_USE_TERMIOS
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]386 bool "Use termios to manipulate the screen"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]387 default y
Paul Fox9e1f92d2008-03-20 16:04:36 +0000[diff] [blame]388 depends on MORE || TOP
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]389 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]390 This option allows utilities such as 'more' and 'top' to determine
391 the size of the screen. If you leave this disabled, your utilities
Eric Andersen88c916b2003-10-22 09:58:56 +0000[diff] [blame]392 that display things on the screen will be especially primitive and
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]393 will be unable to determine the current screen size, and will be
394 unable to move the cursor.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]395
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]396config VOLUMEID
397 bool "Routines for detecting label and uuid on common filesystems"
398 default n
399 help
400 TODO
401
402config FEATURE_VOLUMEID_EXT
403 bool "Ext filesystem"
404 default n
405 depends on VOLUMEID
406 help
407 TODO
408
409config FEATURE_VOLUMEID_REISERFS
410 bool "Reiser filesystem"
411 default n
412 depends on VOLUMEID
413 help
414 TODO
415
416config FEATURE_VOLUMEID_FAT
417 bool "fat filesystem"
418 default n
419 depends on VOLUMEID
420 help
421 TODO
422
423config FEATURE_VOLUMEID_HFS
424 bool "hfs filesystem"
425 default n
426 depends on VOLUMEID
427 help
428 TODO
429
430config FEATURE_VOLUMEID_JFS
431 bool "jfs filesystem"
432 default n
433 depends on VOLUMEID
434 help
435 TODO
436
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]437### config FEATURE_VOLUMEID_UFS
438### bool "ufs filesystem"
439### default n
440### depends on VOLUMEID
441### help
442### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]443
444config FEATURE_VOLUMEID_XFS
445 bool "xfs filesystem"
446 default n
447 depends on VOLUMEID
448 help
449 TODO
450
451config FEATURE_VOLUMEID_NTFS
452 bool "ntfs filesystem"
453 default n
454 depends on VOLUMEID
455 help
456 TODO
457
458config FEATURE_VOLUMEID_ISO9660
459 bool "iso9660 filesystem"
460 default n
461 depends on VOLUMEID
462 help
463 TODO
464
465config FEATURE_VOLUMEID_UDF
466 bool "udf filesystem"
467 default n
468 depends on VOLUMEID
469 help
470 TODO
471
472config FEATURE_VOLUMEID_LUKS
473 bool "luks filesystem"
474 default n
475 depends on VOLUMEID
476 help
477 TODO
478
479config FEATURE_VOLUMEID_LINUXSWAP
480 bool "linux swap filesystem"
481 default n
482 depends on VOLUMEID
483 help
484 TODO
485
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]486### config FEATURE_VOLUMEID_LVM
487### bool "lvm"
488### default n
489### depends on VOLUMEID
490### help
491### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]492
493config FEATURE_VOLUMEID_CRAMFS
494 bool "cramfs filesystem"
495 default n
496 depends on VOLUMEID
497 help
498 TODO
499
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]500### config FEATURE_VOLUMEID_HPFS
501### bool "hpfs filesystem"
502### default n
503### depends on VOLUMEID
504### help
505### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]506
507config FEATURE_VOLUMEID_ROMFS
508 bool "romfs filesystem"
509 default n
510 depends on VOLUMEID
511 help
512 TODO
513
514config FEATURE_VOLUMEID_SYSV
515 bool "sysv filesystem"
516 default n
517 depends on VOLUMEID
518 help
519 TODO
520
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]521### config FEATURE_VOLUMEID_MINIX
522### bool "minix filesystem"
523### default n
524### depends on VOLUMEID
525### help
526### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]527
Denis Vlasenkoc5b73722008-03-17 09:21:26 +0000[diff] [blame]528### These only detect partition tables - not used (yet?)
529### config FEATURE_VOLUMEID_MAC
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]530### bool "mac filesystem"
531### default n
532### depends on VOLUMEID
533### help
534### TODO
Denis Vlasenko1f228982008-04-22 00:16:29 +0000[diff] [blame]535###
Denis Vlasenkoc5b73722008-03-17 09:21:26 +0000[diff] [blame]536### config FEATURE_VOLUMEID_MSDOS
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]537### bool "msdos filesystem"
538### default n
539### depends on VOLUMEID
540### help
541### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]542
543config FEATURE_VOLUMEID_OCFS2
544 bool "ocfs2 filesystem"
545 default n
546 depends on VOLUMEID
547 help
548 TODO
549
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]550### config FEATURE_VOLUMEID_HIGHPOINTRAID
551### bool "highpoint raid"
552### default n
553### depends on VOLUMEID
554### help
555### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]556
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]557### config FEATURE_VOLUMEID_ISWRAID
558### bool "intel raid"
559### default n
560### depends on VOLUMEID
561### help
562### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]563
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]564### config FEATURE_VOLUMEID_LSIRAID
565### bool "lsi raid"
566### default n
567### depends on VOLUMEID
568### help
569### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]570
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]571### config FEATURE_VOLUMEID_VIARAID
572### bool "via raid"
573### default n
574### depends on VOLUMEID
575### help
576### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]577
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]578### config FEATURE_VOLUMEID_SILICONRAID
579### bool "silicon raid"
580### default n
581### depends on VOLUMEID
582### help
583### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]584
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]585### config FEATURE_VOLUMEID_NVIDIARAID
586### bool "nvidia raid"
587### default n
588### depends on VOLUMEID
589### help
590### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]591
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000[diff] [blame]592### config FEATURE_VOLUMEID_PROMISERAID
593### bool "promise raid"
594### default n
595### depends on VOLUMEID
596### help
597### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]598
599config FEATURE_VOLUMEID_LINUXRAID
600 bool "linuxraid"
601 default n
602 depends on VOLUMEID
603 help
604 TODO
605
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]606config MOUNT
Mike Frysinger55092282006-02-02 23:14:57 +0000[diff] [blame]607 bool "mount"
608 default n
609 help
610 All files and filesystems in Unix are arranged into one big directory
611 tree. The 'mount' utility is used to graft a filesystem onto a
612 particular part of the tree. A filesystem can either live on a block
613 device, or it can be accessible over the network, as is the case with
614 NFS filesystems. Most people using BusyBox will also want to enable
615 the 'mount' utility.
616
Denis Vlasenkob1d8e7d2008-02-16 23:28:42 +0000[diff] [blame]617config FEATURE_MOUNT_FAKE
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000[diff] [blame]618 bool "Support option -f"
Denis Vlasenkob1d8e7d2008-02-16 23:28:42 +0000[diff] [blame]619 default n
620 depends on MOUNT
621 help
622 Enable support for faking a file system mount.
623
Denis Vlasenkof732e962008-02-18 12:07:49 +0000[diff] [blame]624config FEATURE_MOUNT_VERBOSE
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000[diff] [blame]625 bool "Support option -v"
Denis Vlasenkof732e962008-02-18 12:07:49 +0000[diff] [blame]626 default n
627 depends on MOUNT
628 help
629 Enable multi-level -v[vv...] verbose messages. Useful if you
630 debug mount problems and want to see what is exactly passed
631 to the kernel.
632
Denis Vlasenko2535f122007-09-15 13:28:30 +0000[diff] [blame]633config FEATURE_MOUNT_HELPERS
634 bool "Support mount helpers"
635 default n
636 depends on MOUNT
637 help
638 Enable mounting of virtual file systems via external helpers.
Denis Vlasenko32d49bc2008-02-03 23:52:41 +0000[diff] [blame]639 E.g. "mount obexfs#-b00.11.22.33.44.55 /mnt" will in effect call
640 "obexfs -b00.11.22.33.44.55 /mnt"
641 Also "mount -t sometype [-o opts] fs /mnt" will try
642 "sometype [-o opts] fs /mnt" if simple mount syscall fails.
643 The idea is to use such virtual filesystems in /etc/fstab.
Denis Vlasenko2535f122007-09-15 13:28:30 +0000[diff] [blame]644
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]645config FEATURE_MOUNT_LABEL
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000[diff] [blame]646 bool "Support specifiying devices by label or UUID"
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]647 default n
648 depends on MOUNT
Denis Vlasenko4824cca2008-03-21 18:29:01 +0000[diff] [blame]649 select VOLUMEID
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000[diff] [blame]650 help
651 This allows for specifying a device by label or uuid, rather than by
652 name. This feature utilizes the same functionality as findfs.
653
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]654config FEATURE_MOUNT_NFS
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]655 bool "Support mounting NFS file systems"
Mike Frysinger55092282006-02-02 23:14:57 +0000[diff] [blame]656 default n
Denis Vlasenkoa7825f22007-06-16 13:56:51 +0000[diff] [blame]657 depends on MOUNT
658 select FEATURE_HAVE_RPC
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]659 select FEATURE_SYSLOG
Mike Frysinger55092282006-02-02 23:14:57 +0000[diff] [blame]660 help
Rob Landleye3781b72006-08-08 01:39:49 +0000[diff] [blame]661 Enable mounting of NFS file systems.
662
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]663config FEATURE_MOUNT_CIFS
Rob Landley89d9d4d2006-09-01 08:10:44 +0000[diff] [blame]664 bool "Support mounting CIFS/SMB file systems"
665 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]666 depends on MOUNT
Rob Landley89d9d4d2006-09-01 08:10:44 +0000[diff] [blame]667 help
668 Enable support for samba mounts.
Denis Vlasenko39e93cc2006-09-10 18:38:17 +0000[diff] [blame]669
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]670config FEATURE_MOUNT_FLAGS
671 depends on MOUNT
Denis Vlasenko39e93cc2006-09-10 18:38:17 +0000[diff] [blame]672 bool "Support lots of -o flags in mount"
Rob Landleye3781b72006-08-08 01:39:49 +0000[diff] [blame]673 default y
674 help
675 Without this, mount only supports ro/rw/remount. With this, it
676 supports nosuid, suid, dev, nodev, exec, noexec, sync, async, atime,
677 noatime, diratime, nodiratime, loud, bind, move, shared, slave,
678 private, unbindable, rshared, rslave, rprivate, and runbindable.
679
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]680config FEATURE_MOUNT_FSTAB
681 depends on MOUNT
Rob Landleye3781b72006-08-08 01:39:49 +0000[diff] [blame]682 bool "Support /etc/fstab and -a"
683 default y
684 help
685 Support mount all and looking for files in /etc/fstab.
Mike Frysinger55092282006-02-02 23:14:57 +0000[diff] [blame]686
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]687config PIVOT_ROOT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]688 bool "pivot_root"
689 default n
690 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]691 The pivot_root utility swaps the mount points for the root filesystem
692 with some other mounted filesystem. This allows you to do all sorts
693 of wild and crazy things with your Linux system and is far more
694 powerful than 'chroot'.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]695
Rob Landley0f34a822005-10-27 22:55:50 +0000[diff] [blame]696 Note: This is for initrd in linux 2.4. Under initramfs (introduced
697 in linux 2.6) use switch_root instead.
698
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]699config RDATE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]700 bool "rdate"
701 default n
702 help
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000[diff] [blame]703 The rdate utility allows you to synchronize the date and time of your
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]704 system clock with the date and time of a remote networked system using
705 the RFC868 protocol, which is built into the inetd daemon on most
706 systems.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]707
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]708config READPROFILE
Mike Frysinger75aa1922005-09-24 23:12:38 +0000[diff] [blame]709 bool "readprofile"
710 default n
711 help
712 This allows you to parse /proc/profile for basic profiling.
713
Mike Frysinger6b160e42008-02-15 02:27:19 +0000[diff] [blame]714config RTCWAKE
715 bool "rtcwake"
716 default n
717 help
718 Enter a system sleep state until specified wakeup time.
719
Denis Vlasenko376003b2008-04-21 05:05:17 +0000[diff] [blame]720config SCRIPT
721 bool "script"
722 default n
723 help
724 The script makes typescript of terminal session.
725
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]726config SETARCH
Mike Frysinger0a6b0bf2006-02-21 04:26:52 +0000[diff] [blame]727 bool "setarch"
728 default n
729 help
730 The linux32 utility is used to create a 32bit environment for the
731 specified program (usually a shell). It only makes sense to have
732 this util on a system that supports both 64bit and 32bit userland
733 (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
734
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]735config SWAPONOFF
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]736 bool "swaponoff"
737 default n
738 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]739 This option enables both the 'swapon' and the 'swapoff' utilities.
740 Once you have created some swap space using 'mkswap', you also need
741 to enable your swap space with the 'swapon' utility. The 'swapoff'
742 utility is used, typically at system shutdown, to disable any swap
743 space. If you are not using any swap space, you can leave this
744 option disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]745
Denis Vlasenkoee56e012008-05-18 23:05:34 +0000[diff] [blame]746config FEATURE_SWAPON_PRI
Bernhard Reutner-Fischer3576bed2008-05-19 08:25:23 +0000[diff] [blame]747 bool "Support priority option -p"
Denis Vlasenkoee56e012008-05-18 23:05:34 +0000[diff] [blame]748 default n
749 depends on SWAPONOFF
750 help
751 Enable support for setting swap device priority in swapon.
752
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]753config SWITCH_ROOT
Mike Frysinger55092282006-02-02 23:14:57 +0000[diff] [blame]754 bool "switch_root"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]755 default n
756 help
Mike Frysinger55092282006-02-02 23:14:57 +0000[diff] [blame]757 The switch_root utility is used from initramfs to select a new
758 root device. Under initramfs, you have to use this instead of
759 pivot_root. (Stop reading here if you don't care why.)
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]760
Mike Frysinger55092282006-02-02 23:14:57 +0000[diff] [blame]761 Booting with initramfs extracts a gzipped cpio archive into rootfs
762 (which is a variant of ramfs/tmpfs). Because rootfs can't be moved
763 or unmounted*, pivot_root will not work from initramfs. Instead,
764 switch_root deletes everything out of rootfs (including itself),
765 does a mount --move that overmounts rootfs with the new root, and
766 then execs the specified init program.
767
768 * Because the Linux kernel uses rootfs internally as the starting
769 and ending point for searching through the kernel's doubly linked
770 list of active mount points. That's why.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]771
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]772config UMOUNT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]773 bool "umount"
774 default n
775 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]776 When you want to remove a mounted filesystem from its current mount point,
777 for example when you are shutting down the system, the 'umount' utility is
778 the tool to use. If you enabled the 'mount' utility, you almost certainly
779 also want to enable 'umount'.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]780
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]781config FEATURE_UMOUNT_ALL
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000[diff] [blame]782 bool "Support option -a"
Rob Landleycc6d8d32006-02-08 20:06:57 +0000[diff] [blame]783 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]784 depends on UMOUNT
Rob Landleycc6d8d32006-02-08 20:06:57 +0000[diff] [blame]785 help
786 Support -a option to unmount all currently mounted filesystems.
787
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]788comment "Common options for mount/umount"
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]789 depends on MOUNT || UMOUNT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]790
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]791config FEATURE_MOUNT_LOOP
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]792 bool "Support loopback mounts"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]793 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]794 depends on MOUNT || UMOUNT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]795 help
Rob Landley6a6798b2005-08-10 20:35:54 +0000[diff] [blame]796 Enabling this feature allows automatic mounting of files (containing
797 filesystem images) via the linux kernel's loopback devices. The mount
798 command will detect you are trying to mount a file instead of a block
799 device, and transparently associate the file with a loopback device.
800 The umount command will also free that loopback device.
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame]801
Rob Landley6a6798b2005-08-10 20:35:54 +0000[diff] [blame]802 You can still use the 'losetup' utility (to manually associate files
Mike Frysinger71a6a4e2007-01-24 08:24:43 +0000[diff] [blame]803 with loop devices) if you need to do something advanced, such as
Rob Landley6a6798b2005-08-10 20:35:54 +0000[diff] [blame]804 specify an offset or cryptographic options to the loopback device.
805 (If you don't want umount to free the loop device, use "umount -D".)
Paul Fox3f6f3172005-07-19 20:55:37 +0000[diff] [blame]806
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]807config FEATURE_MTAB_SUPPORT
Rob Landley2ec922e2006-04-13 23:22:16 +0000[diff] [blame]808 bool "Support for the old /etc/mtab file"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]809 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000[diff] [blame]810 depends on MOUNT || UMOUNT
Denis Vlasenkob1d8e7d2008-02-16 23:28:42 +0000[diff] [blame]811 select FEATURE_MOUNT_FAKE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]812 help
Rob Landley6a6798b2005-08-10 20:35:54 +0000[diff] [blame]813 Historically, Unix systems kept track of the currently mounted
814 partitions in the file "/etc/mtab". These days, the kernel exports
815 the list of currently mounted partitions in "/proc/mounts", rendering
816 the old mtab file obsolete. (In modern systems, /etc/mtab should be
817 a symlink to /proc/mounts.)
Eric Andersena0ac4522003-02-27 03:14:04 +0000[diff] [blame]818
Rob Landley6a6798b2005-08-10 20:35:54 +0000[diff] [blame]819 The only reason to have mount maintain an /etc/mtab file itself is if
820 your stripped-down embedded system does not have a /proc directory.
821 If you must use this, keep in mind it's inherently brittle (for
822 example a mount under chroot won't update it), can't handle modern
823 features like separate per-process filesystem namespaces, requires
824 that your /etc directory be writeable, tends to get easily confused
Rob Landley17507fa2006-05-08 02:22:24 +0000[diff] [blame]825 by --bind or --move mounts, won't update if you rename a directory
826 that contains a mount point, and so on. (In brief: avoid.)
827
828 About the only reason to use this is if you've removed /proc from
829 your kernel.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]830
Eric Andersenc9f20d92002-12-05 08:41:41 +0000[diff] [blame]831endmenu