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Eric Andersenc9f20d92002-12-05 08:41:41 +00001#
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 Vlasenko1e19afd2008-10-12 11:20:08 +00008config BLKID
9 bool "blkid"
10 default n
11 select VOLUMEID
12 help
13 Lists labels and UUIDs of all filesystems.
14 WARNING:
15 With all submodules selected, it will add ~8k to busybox.
16
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000017config DMESG
Eric Andersenc9f20d92002-12-05 08:41:41 +000018 bool "dmesg"
19 default n
20 help
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000021 dmesg is used to examine or control the kernel ring buffer. When the
Eric Andersena0ac4522003-02-27 03:14:04 +000022 Linux kernel prints messages to the system log, they are stored in
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000023 the kernel ring buffer. You can use dmesg to print the kernel's ring
Eric Andersena0ac4522003-02-27 03:14:04 +000024 buffer, clear the kernel ring buffer, change the size of the kernel
25 ring buffer, and change the priority level at which kernel messages
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000026 are also logged to the system console. Enable this option if you
Eric Andersena0ac4522003-02-27 03:14:04 +000027 wish to enable the 'dmesg' utility.
Eric Andersenc9f20d92002-12-05 08:41:41 +000028
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000029config FEATURE_DMESG_PRETTY
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +000030 bool "Pretty dmesg output"
Rob Landley446129a2006-07-27 16:40:55 +000031 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000032 depends on DMESG
Rob Landley446129a2006-07-27 16:40:55 +000033 help
34 If you wish to scrub the syslog level from the output, say 'Y' here.
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000035 The syslog level is a string prefixed to every line with the form
36 "<#>".
Rob Landley446129a2006-07-27 16:40:55 +000037
38 With this option you will see:
39 # dmesg
40 Linux version 2.6.17.4 .....
41 BIOS-provided physical RAM map:
42 BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
43
44 Without this option you will see:
45 # dmesg
46 <5>Linux version 2.6.17.4 .....
47 <6>BIOS-provided physical RAM map:
48 <6> BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
49
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000050config FBSET
Eric Andersenc9f20d92002-12-05 08:41:41 +000051 bool "fbset"
52 default n
53 help
Eric Andersena0ac4522003-02-27 03:14:04 +000054 fbset is used to show or change the settings of a Linux frame buffer
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000055 device. The frame buffer device provides a simple and unique
56 interface to access a graphics display. Enable this option
Eric Andersen88c916b2003-10-22 09:58:56 +000057 if you wish to enable the 'fbset' utility.
Eric Andersena0ac4522003-02-27 03:14:04 +000058
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000059config FEATURE_FBSET_FANCY
Rob Landley2ec922e2006-04-13 23:22:16 +000060 bool "Turn on extra fbset options"
Eric Andersenc9f20d92002-12-05 08:41:41 +000061 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000062 depends on FBSET
Eric Andersenc9f20d92002-12-05 08:41:41 +000063 help
Eric Andersena0ac4522003-02-27 03:14:04 +000064 This option enables extended fbset options, allowing one to set the
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000065 framebuffer size, color depth, etc. interface to access a graphics
66 display. Enable this option if you wish to enable extended fbset
Eric Andersena0ac4522003-02-27 03:14:04 +000067 options.
Eric Andersenc9f20d92002-12-05 08:41:41 +000068
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000069config FEATURE_FBSET_READMODE
Rob Landley2ec922e2006-04-13 23:22:16 +000070 bool "Turn on fbset readmode support"
Eric Andersenc9f20d92002-12-05 08:41:41 +000071 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000072 depends on FBSET
Eric Andersenc9f20d92002-12-05 08:41:41 +000073 help
Eric Andersena0ac4522003-02-27 03:14:04 +000074 This option allows fbset to read the video mode database stored by
75 default as /etc/fb.modes, which can be used to set frame buffer
76 device to pre-defined video modes.
Eric Andersenc9f20d92002-12-05 08:41:41 +000077
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000078config FDFLUSH
Eric Andersenc9f20d92002-12-05 08:41:41 +000079 bool "fdflush"
80 default n
81 help
Eric Andersen88c916b2003-10-22 09:58:56 +000082 fdflush is only needed when changing media on slightly-broken
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000083 removable media drives. It is used to make Linux believe that a
Eric Andersena0ac4522003-02-27 03:14:04 +000084 hardware disk-change switch has been actuated, which causes Linux to
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000085 forget anything it has cached from the previous media. If you have
Eric Andersena0ac4522003-02-27 03:14:04 +000086 such a slightly-broken drive, you will need to run fdflush every time
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +000087 you change a disk. Most people have working hardware and can safely
Eric Andersen88c916b2003-10-22 09:58:56 +000088 leave this disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +000089
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000090config FDFORMAT
Eric Andersen01c3d402003-07-05 07:51:31 +000091 bool "fdformat"
92 default n
93 help
Eric Andersen88c916b2003-10-22 09:58:56 +000094 fdformat is used to low-level format a floppy disk.
Eric Andersen01c3d402003-07-05 07:51:31 +000095
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000096config FDISK
Eric Andersenc9f20d92002-12-05 08:41:41 +000097 bool "fdisk"
98 default n
99 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000100 The fdisk utility is used to divide hard disks into one or more
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000101 logical disks, which are generally called partitions. This utility
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000102 can be used to list and edit the set of partitions or BSD style
Eric Andersena0ac4522003-02-27 03:14:04 +0000103 'disk slices' that are defined on a hard drive.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000104
Eric Andersen84bdea82004-05-19 10:49:17 +0000105config FDISK_SUPPORT_LARGE_DISKS
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000106 bool "Support over 4GB disks"
Eric Andersen84bdea82004-05-19 10:49:17 +0000107 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000108 depends on FDISK
Eric Andersen84bdea82004-05-19 10:49:17 +0000109 help
110 Enable this option to support large disks > 4GB.
111
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000112config FEATURE_FDISK_WRITABLE
Rob Landley2ec922e2006-04-13 23:22:16 +0000113 bool "Write support"
Glenn L McGrath4dcc2dd2003-01-04 11:56:06 +0000114 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000115 depends on FDISK
Glenn L McGrath4dcc2dd2003-01-04 11:56:06 +0000116 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000117 Enabling this option allows you to create or change a partition table
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000118 and write those changes out to disk. If you leave this option
Eric Andersena0ac4522003-02-27 03:14:04 +0000119 disabled, you will only be able to view the partition table.
Glenn L McGrath4dcc2dd2003-01-04 11:56:06 +0000120
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000121config FEATURE_AIX_LABEL
Rob Landley2ec922e2006-04-13 23:22:16 +0000122 bool "Support AIX disklabels"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000123 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000124 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000125 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000126 Enabling this option allows you to create or change AIX disklabels.
127 Most people can safely leave this option disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000128
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000129config FEATURE_SGI_LABEL
Rob Landley2ec922e2006-04-13 23:22:16 +0000130 bool "Support SGI disklabels"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000131 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000132 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000133 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000134 Enabling this option allows you to create or change SGI disklabels.
135 Most people can safely leave this option disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000136
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000137config FEATURE_SUN_LABEL
Rob Landley2ec922e2006-04-13 23:22:16 +0000138 bool "Support SUN disklabels"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000139 default n
Mike Frysinger71a6a4e2007-01-24 08:24:43 +0000140 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000141 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000142 Enabling this option allows you to create or change SUN disklabels.
143 Most people can safely leave this option disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000144
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000145config FEATURE_OSF_LABEL
Rob Landley2ec922e2006-04-13 23:22:16 +0000146 bool "Support BSD disklabels"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000147 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000148 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000149 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000150 Enabling this option allows you to create or change BSD disklabels
151 and define and edit BSD disk slices.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000152
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000153config FEATURE_FDISK_ADVANCED
Rob Landley2ec922e2006-04-13 23:22:16 +0000154 bool "Support expert mode"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000155 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000156 depends on FDISK && FEATURE_FDISK_WRITABLE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000157 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000158 Enabling this option allows you to do terribly unsafe things like
159 define arbitrary drive geometry, move the beginning of data in a
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000160 partition, and similarly evil things. Unless you have a very good
Eric Andersena0ac4522003-02-27 03:14:04 +0000161 reason you would be wise to leave this disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000162
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000163config FINDFS
164 bool "findfs"
165 default n
166 select VOLUMEID
167 help
Denis Vlasenko1e19afd2008-10-12 11:20:08 +0000168 Prints the name of a filesystem with given laver or UUID.
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000169 WARNING:
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000170 With all submodules selected, it will add ~8k to busybox.
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000171
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000172config FREERAMDISK
Eric Andersenc9f20d92002-12-05 08:41:41 +0000173 bool "freeramdisk"
174 default n
175 help
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000176 Linux allows you to create ramdisks. This utility allows you to
Eric Andersena0ac4522003-02-27 03:14:04 +0000177 delete them and completely free all memory that was used for the
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000178 ramdisk. For example, if you boot Linux into a ramdisk and later
Eric Andersena0ac4522003-02-27 03:14:04 +0000179 pivot_root, you may want to free the memory that is allocated to the
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000180 ramdisk. If you have no use for freeing memory from a ramdisk, leave
Eric Andersena0ac4522003-02-27 03:14:04 +0000181 this disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000182
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000183config FSCK_MINIX
Eric Andersenc9f20d92002-12-05 08:41:41 +0000184 bool "fsck_minix"
185 default n
186 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000187 The minix filesystem is a nice, small, compact, read-write filesystem
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000188 with little overhead. It is not a journaling filesystem however and
Eric Andersen88c916b2003-10-22 09:58:56 +0000189 can experience corruption if it is not properly unmounted or if the
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000190 power goes off in the middle of a write. This utility allows you to
Eric Andersena0ac4522003-02-27 03:14:04 +0000191 check for and attempt to repair any corruption that occurs to a minix
192 filesystem.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000193
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000194config MKFS_MINIX
Eric Andersenc9f20d92002-12-05 08:41:41 +0000195 bool "mkfs_minix"
196 default n
197 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000198 The minix filesystem is a nice, small, compact, read-write filesystem
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000199 with little overhead. If you wish to be able to create minix
200 filesystems this utility will do the job for you.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000201
202comment "Minix filesystem support"
Mike Frysinger71a6a4e2007-01-24 08:24:43 +0000203 depends on FSCK_MINIX || MKFS_MINIX
Eric Andersenc9f20d92002-12-05 08:41:41 +0000204
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000205config FEATURE_MINIX2
Rob Landley2ec922e2006-04-13 23:22:16 +0000206 bool "Support Minix fs v2 (fsck_minix/mkfs_minix)"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000207 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000208 depends on FSCK_MINIX || MKFS_MINIX
Eric Andersenc9f20d92002-12-05 08:41:41 +0000209 help
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000210 If you wish to be able to create version 2 minix filesystems, enable
211 this. If you enabled 'mkfs_minix' then you almost certainly want to
212 be using the version 2 filesystem support.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000213
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000214config GETOPT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000215 bool "getopt"
216 default n
217 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000218 The getopt utility is used to break up (parse) options in command
219 lines to make it easy to write complex shell scripts that also check
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000220 for legal (and illegal) options. If you want to write horribly
Eric Andersena0ac4522003-02-27 03:14:04 +0000221 complex shell scripts, or use some horribly complex shell script
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000222 written by others, this utility may be for you. Most people will
Eric Andersena0ac4522003-02-27 03:14:04 +0000223 wisely leave this disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000224
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000225config HEXDUMP
Eric Andersenc9f20d92002-12-05 08:41:41 +0000226 bool "hexdump"
227 default n
228 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000229 The hexdump utility is used to display binary data in a readable
230 way that is comparable to the output from most hex editors.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000231
Denis Vlasenkofbe5f392007-11-18 05:36:50 +0000232config FEATURE_HEXDUMP_REVERSE
233 bool "Support -R, reverse of 'hexdump -Cv'"
234 default n
235 depends on HEXDUMP
236 help
237 The hexdump utility is used to display binary data in an ascii
238 readable way. This option creates binary data from an ascii input.
239 NB: this option is non-standard. It's unwise to use it in scripts
240 aimed to be portable.
241
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000242config HD
243 bool "hd"
244 default n
245 select HEXDUMP
246 help
247 hd is an alias to hexdump -C.
248
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000249config HWCLOCK
Eric Andersenc9f20d92002-12-05 08:41:41 +0000250 bool "hwclock"
251 default n
252 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000253 The hwclock utility is used to read and set the hardware clock
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000254 on a system. This is primarily used to set the current time on
Eric Andersen88c916b2003-10-22 09:58:56 +0000255 shutdown in the hardware clock, so the hardware will keep the
256 correct time when Linux is _not_ running.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000257
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000258config FEATURE_HWCLOCK_LONG_OPTIONS
Rob Landley2ec922e2006-04-13 23:22:16 +0000259 bool "Support long options (--hctosys,...)"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000260 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000261 depends on HWCLOCK && GETOPT_LONG
Eric Andersenc9f20d92002-12-05 08:41:41 +0000262 help
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000263 By default, the hwclock utility only uses short options. If you
Eric Andersen88c916b2003-10-22 09:58:56 +0000264 are overly fond of its long options, such as --hctosys, --utc, etc)
Eric Andersena0ac4522003-02-27 03:14:04 +0000265 then enable this option.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000266
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000267config FEATURE_HWCLOCK_ADJTIME_FHS
Rob Landley2ec922e2006-04-13 23:22:16 +0000268 bool "Use FHS /var/lib/hwclock/adjtime"
Mike Frysinger747fc5d2005-09-28 03:21:21 +0000269 default y
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000270 depends on HWCLOCK
Mike Frysinger747fc5d2005-09-28 03:21:21 +0000271 help
272 Starting with FHS 2.3, the adjtime state file is supposed to exist
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000273 at /var/lib/hwclock/adjtime instead of /etc/adjtime. If you wish
Mike Frysinger747fc5d2005-09-28 03:21:21 +0000274 to use the FHS behavior, answer Y here, otherwise answer N for the
275 classic /etc/adjtime path.
276
Bernhard Reutner-Fischere99a92d2008-07-22 18:32:06 +0000277 pathname.com/fhs/pub/fhs-2.3.html#VARLIBHWCLOCKSTATEDIRECTORYFORHWCLO
Mike Frysinger747fc5d2005-09-28 03:21:21 +0000278
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000279config IPCRM
Rob Landley6eb1e412005-06-20 04:30:36 +0000280 bool "ipcrm"
281 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000282 select FEATURE_SUID
Rob Landley6eb1e412005-06-20 04:30:36 +0000283 help
284 The ipcrm utility allows the removal of System V interprocess
285 communication (IPC) objects and the associated data structures
286 from the system.
287
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000288config IPCS
Rob Landley6eb1e412005-06-20 04:30:36 +0000289 bool "ipcs"
290 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000291 select FEATURE_SUID
Rob Landley6eb1e412005-06-20 04:30:36 +0000292 help
293 The ipcs utility is used to provide information on the currently
294 allocated System V interprocess (IPC) objects in the system.
295
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000296config LOSETUP
Mike Frysinger75aa1922005-09-24 23:12:38 +0000297 bool "losetup"
298 default n
299 help
300 losetup is used to associate or detach a loop device with a regular
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000301 file or block device, and to query the status of a loop device. This
Mike Frysinger75aa1922005-09-24 23:12:38 +0000302 version does not currently support enabling data encryption.
303
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000304config MDEV
Rob Landley70f7ef72005-12-13 08:21:33 +0000305 bool "mdev"
306 default n
307 help
Mike Frysingerae302102007-02-14 13:20:29 +0000308 mdev is a mini-udev implementation for dynamically creating device
309 nodes in the /dev directory.
310
311 For more information, please see docs/mdev.txt
Rob Landley70f7ef72005-12-13 08:21:33 +0000312
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000313config FEATURE_MDEV_CONF
Rob Landley2ec922e2006-04-13 23:22:16 +0000314 bool "Support /etc/mdev.conf"
Rob Landley70f7ef72005-12-13 08:21:33 +0000315 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000316 depends on MDEV
Rob Landley70f7ef72005-12-13 08:21:33 +0000317 help
Mike Frysingerae302102007-02-14 13:20:29 +0000318 Add support for the mdev config file to control ownership and
319 permissions of the device nodes.
Rob Landley70f7ef72005-12-13 08:21:33 +0000320
Mike Frysingerae302102007-02-14 13:20:29 +0000321 For more information, please see docs/mdev.txt
Rob Landley70f7ef72005-12-13 08:21:33 +0000322
Mike Frysingerf0044c42008-02-01 06:53:50 +0000323config FEATURE_MDEV_RENAME
324 bool "Support subdirs/symlinks"
325 default n
326 depends on FEATURE_MDEV_CONF
327 help
328 Add support for renaming devices and creating symlinks.
329
330 For more information, please see docs/mdev.txt
331
Denis Vlasenkof2f38682008-03-29 17:26:10 +0000332config FEATURE_MDEV_RENAME_REGEXP
333 bool "Support regular expressions substitutions when renaming device"
334 default n
335 depends on FEATURE_MDEV_RENAME
336 help
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000337 Add support for regular expressions substitutions when renaming
338 device.
Denis Vlasenkof2f38682008-03-29 17:26:10 +0000339
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000340config FEATURE_MDEV_EXEC
Rob Landleyef10d522006-06-26 14:11:33 +0000341 bool "Support command execution at device addition/removal"
342 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000343 depends on FEATURE_MDEV_CONF
Rob Landleyef10d522006-06-26 14:11:33 +0000344 help
Mike Frysingerae302102007-02-14 13:20:29 +0000345 This adds support for an optional field to /etc/mdev.conf for
346 executing commands when devices are created/removed.
Rob Landleyef10d522006-06-26 14:11:33 +0000347
Mike Frysingerae302102007-02-14 13:20:29 +0000348 For more information, please see docs/mdev.txt
Rob Landleyef10d522006-06-26 14:11:33 +0000349
Mike Frysingera78ef2c2007-06-13 07:34:15 +0000350config FEATURE_MDEV_LOAD_FIRMWARE
351 bool "Support loading of firmwares"
352 default n
353 depends on MDEV
354 help
355 Some devices need to load firmware before they can be usable.
356
357 These devices will request userspace look up the files in
358 /lib/firmware/ and if it exists, send it to the kernel for
359 loading into the hardware.
360
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000361config MKSWAP
Eric Andersenc9f20d92002-12-05 08:41:41 +0000362 bool "mkswap"
363 default n
364 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000365 The mkswap utility is used to configure a file or disk partition as
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000366 Linux swap space. This allows Linux to use the entire file or
Eric Andersena0ac4522003-02-27 03:14:04 +0000367 partition as if it were additional RAM, which can greatly increase
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000368 the capability of low-memory machines. This additional memory is
Eric Andersena0ac4522003-02-27 03:14:04 +0000369 much slower than real RAM, but can be very helpful at preventing your
Eric Andersen88c916b2003-10-22 09:58:56 +0000370 applications being killed by the Linux out of memory (OOM) killer.
371 Once you have created swap space using 'mkswap' you need to enable
372 the swap space using the 'swapon' utility.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000373
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000374config FEATURE_MKSWAP_V0
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000375 bool "Version 0 support"
Bernhard Reutner-Fischer56dd0bf2006-03-29 17:32:24 +0000376 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000377 depends on MKSWAP
378# depends on MKSWAP && DEPRECATED
Bernhard Reutner-Fischer56dd0bf2006-03-29 17:32:24 +0000379 help
380 Enable support for the old v0 style.
381 If your kernel is older than 2.1.117, then v0 support is the
382 only option.
383
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000384config MORE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000385 bool "more"
386 default n
387 help
Eric Andersen88c916b2003-10-22 09:58:56 +0000388 more is a simple utility which allows you to read text one screen
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000389 sized page at a time. If you want to read text that is larger than
Eric Andersena0ac4522003-02-27 03:14:04 +0000390 the screen, and you are using anything faster than a 300 baud modem,
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000391 you will probably find this utility very helpful. If you don't have
Eric Andersena0ac4522003-02-27 03:14:04 +0000392 any need to reading text files, you can leave this disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000393
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000394config FEATURE_USE_TERMIOS
Rob Landley2ec922e2006-04-13 23:22:16 +0000395 bool "Use termios to manipulate the screen"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000396 default y
Paul Fox9e1f92d2008-03-20 16:04:36 +0000397 depends on MORE || TOP
Eric Andersenc9f20d92002-12-05 08:41:41 +0000398 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000399 This option allows utilities such as 'more' and 'top' to determine
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000400 the size of the screen. If you leave this disabled, your utilities
Eric Andersen88c916b2003-10-22 09:58:56 +0000401 that display things on the screen will be especially primitive and
Eric Andersena0ac4522003-02-27 03:14:04 +0000402 will be unable to determine the current screen size, and will be
403 unable to move the cursor.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000404
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000405config VOLUMEID
406 bool "Routines for detecting label and uuid on common filesystems"
407 default n
408 help
409 TODO
410
411config FEATURE_VOLUMEID_EXT
412 bool "Ext filesystem"
413 default n
414 depends on VOLUMEID
415 help
416 TODO
417
418config FEATURE_VOLUMEID_REISERFS
419 bool "Reiser filesystem"
420 default n
421 depends on VOLUMEID
422 help
423 TODO
424
425config FEATURE_VOLUMEID_FAT
426 bool "fat filesystem"
427 default n
428 depends on VOLUMEID
429 help
430 TODO
431
432config FEATURE_VOLUMEID_HFS
433 bool "hfs filesystem"
434 default n
435 depends on VOLUMEID
436 help
437 TODO
438
439config FEATURE_VOLUMEID_JFS
440 bool "jfs filesystem"
441 default n
442 depends on VOLUMEID
443 help
444 TODO
445
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000446### config FEATURE_VOLUMEID_UFS
447### bool "ufs filesystem"
448### default n
449### depends on VOLUMEID
450### help
451### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000452
453config FEATURE_VOLUMEID_XFS
454 bool "xfs filesystem"
455 default n
456 depends on VOLUMEID
457 help
458 TODO
459
460config FEATURE_VOLUMEID_NTFS
461 bool "ntfs filesystem"
462 default n
463 depends on VOLUMEID
464 help
465 TODO
466
467config FEATURE_VOLUMEID_ISO9660
468 bool "iso9660 filesystem"
469 default n
470 depends on VOLUMEID
471 help
472 TODO
473
474config FEATURE_VOLUMEID_UDF
475 bool "udf filesystem"
476 default n
477 depends on VOLUMEID
478 help
479 TODO
480
481config FEATURE_VOLUMEID_LUKS
482 bool "luks filesystem"
483 default n
484 depends on VOLUMEID
485 help
486 TODO
487
488config FEATURE_VOLUMEID_LINUXSWAP
489 bool "linux swap filesystem"
490 default n
491 depends on VOLUMEID
492 help
493 TODO
494
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000495### config FEATURE_VOLUMEID_LVM
496### bool "lvm"
497### default n
498### depends on VOLUMEID
499### help
500### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000501
502config FEATURE_VOLUMEID_CRAMFS
503 bool "cramfs filesystem"
504 default n
505 depends on VOLUMEID
506 help
507 TODO
508
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000509### config FEATURE_VOLUMEID_HPFS
510### bool "hpfs filesystem"
511### default n
512### depends on VOLUMEID
513### help
514### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000515
516config FEATURE_VOLUMEID_ROMFS
517 bool "romfs filesystem"
518 default n
519 depends on VOLUMEID
520 help
521 TODO
522
523config FEATURE_VOLUMEID_SYSV
524 bool "sysv filesystem"
525 default n
526 depends on VOLUMEID
527 help
528 TODO
529
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000530### config FEATURE_VOLUMEID_MINIX
531### bool "minix filesystem"
532### default n
533### depends on VOLUMEID
534### help
535### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000536
Denis Vlasenkoc5b73722008-03-17 09:21:26 +0000537### These only detect partition tables - not used (yet?)
538### config FEATURE_VOLUMEID_MAC
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000539### bool "mac filesystem"
540### default n
541### depends on VOLUMEID
542### help
543### TODO
Denis Vlasenko1f228982008-04-22 00:16:29 +0000544###
Denis Vlasenkoc5b73722008-03-17 09:21:26 +0000545### config FEATURE_VOLUMEID_MSDOS
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000546### bool "msdos filesystem"
547### default n
548### depends on VOLUMEID
549### help
550### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000551
552config FEATURE_VOLUMEID_OCFS2
553 bool "ocfs2 filesystem"
554 default n
555 depends on VOLUMEID
556 help
557 TODO
558
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000559### config FEATURE_VOLUMEID_HIGHPOINTRAID
560### bool "highpoint raid"
561### default n
562### depends on VOLUMEID
563### help
564### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000565
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000566### config FEATURE_VOLUMEID_ISWRAID
567### bool "intel raid"
568### default n
569### depends on VOLUMEID
570### help
571### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000572
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000573### config FEATURE_VOLUMEID_LSIRAID
574### bool "lsi raid"
575### default n
576### depends on VOLUMEID
577### help
578### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000579
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000580### config FEATURE_VOLUMEID_VIARAID
581### bool "via raid"
582### default n
583### depends on VOLUMEID
584### help
585### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000586
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000587### config FEATURE_VOLUMEID_SILICONRAID
588### bool "silicon raid"
589### default n
590### depends on VOLUMEID
591### help
592### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000593
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000594### config FEATURE_VOLUMEID_NVIDIARAID
595### bool "nvidia raid"
596### default n
597### depends on VOLUMEID
598### help
599### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000600
Denis Vlasenkod25c33f2008-03-17 09:25:05 +0000601### config FEATURE_VOLUMEID_PROMISERAID
602### bool "promise raid"
603### default n
604### depends on VOLUMEID
605### help
606### TODO
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000607
608config FEATURE_VOLUMEID_LINUXRAID
609 bool "linuxraid"
610 default n
611 depends on VOLUMEID
612 help
613 TODO
614
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000615config MOUNT
Mike Frysinger55092282006-02-02 23:14:57 +0000616 bool "mount"
617 default n
618 help
619 All files and filesystems in Unix are arranged into one big directory
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000620 tree. The 'mount' utility is used to graft a filesystem onto a
621 particular part of the tree. A filesystem can either live on a block
Mike Frysinger55092282006-02-02 23:14:57 +0000622 device, or it can be accessible over the network, as is the case with
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000623 NFS filesystems. Most people using BusyBox will also want to enable
Mike Frysinger55092282006-02-02 23:14:57 +0000624 the 'mount' utility.
625
Denis Vlasenkob1d8e7d2008-02-16 23:28:42 +0000626config FEATURE_MOUNT_FAKE
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000627 bool "Support option -f"
Denis Vlasenkob1d8e7d2008-02-16 23:28:42 +0000628 default n
629 depends on MOUNT
630 help
631 Enable support for faking a file system mount.
632
Denis Vlasenkof732e962008-02-18 12:07:49 +0000633config FEATURE_MOUNT_VERBOSE
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000634 bool "Support option -v"
Denis Vlasenkof732e962008-02-18 12:07:49 +0000635 default n
636 depends on MOUNT
637 help
638 Enable multi-level -v[vv...] verbose messages. Useful if you
639 debug mount problems and want to see what is exactly passed
640 to the kernel.
641
Denis Vlasenko2535f122007-09-15 13:28:30 +0000642config FEATURE_MOUNT_HELPERS
643 bool "Support mount helpers"
644 default n
645 depends on MOUNT
646 help
647 Enable mounting of virtual file systems via external helpers.
Denis Vlasenko32d49bc2008-02-03 23:52:41 +0000648 E.g. "mount obexfs#-b00.11.22.33.44.55 /mnt" will in effect call
649 "obexfs -b00.11.22.33.44.55 /mnt"
650 Also "mount -t sometype [-o opts] fs /mnt" will try
651 "sometype [-o opts] fs /mnt" if simple mount syscall fails.
652 The idea is to use such virtual filesystems in /etc/fstab.
Denis Vlasenko2535f122007-09-15 13:28:30 +0000653
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000654config FEATURE_MOUNT_LABEL
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000655 bool "Support specifiying devices by label or UUID"
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000656 default n
657 depends on MOUNT
Denis Vlasenko4824cca2008-03-21 18:29:01 +0000658 select VOLUMEID
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000659 help
660 This allows for specifying a device by label or uuid, rather than by
Denis Vlasenko1e19afd2008-10-12 11:20:08 +0000661 name. This feature utilizes the same functionality as blkid/findfs.
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000662
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000663config FEATURE_MOUNT_NFS
Rob Landley2ec922e2006-04-13 23:22:16 +0000664 bool "Support mounting NFS file systems"
Mike Frysinger55092282006-02-02 23:14:57 +0000665 default n
Denis Vlasenkoa7825f22007-06-16 13:56:51 +0000666 depends on MOUNT
667 select FEATURE_HAVE_RPC
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000668 select FEATURE_SYSLOG
Mike Frysinger55092282006-02-02 23:14:57 +0000669 help
Rob Landleye3781b72006-08-08 01:39:49 +0000670 Enable mounting of NFS file systems.
671
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000672config FEATURE_MOUNT_CIFS
Rob Landley89d9d4d2006-09-01 08:10:44 +0000673 bool "Support mounting CIFS/SMB file systems"
674 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000675 depends on MOUNT
Rob Landley89d9d4d2006-09-01 08:10:44 +0000676 help
677 Enable support for samba mounts.
Denis Vlasenko39e93cc2006-09-10 18:38:17 +0000678
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000679config FEATURE_MOUNT_FLAGS
680 depends on MOUNT
Denis Vlasenko39e93cc2006-09-10 18:38:17 +0000681 bool "Support lots of -o flags in mount"
Rob Landleye3781b72006-08-08 01:39:49 +0000682 default y
683 help
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000684 Without this, mount only supports ro/rw/remount. With this, it
Rob Landleye3781b72006-08-08 01:39:49 +0000685 supports nosuid, suid, dev, nodev, exec, noexec, sync, async, atime,
686 noatime, diratime, nodiratime, loud, bind, move, shared, slave,
687 private, unbindable, rshared, rslave, rprivate, and runbindable.
688
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000689config FEATURE_MOUNT_FSTAB
690 depends on MOUNT
Rob Landleye3781b72006-08-08 01:39:49 +0000691 bool "Support /etc/fstab and -a"
692 default y
693 help
694 Support mount all and looking for files in /etc/fstab.
Mike Frysinger55092282006-02-02 23:14:57 +0000695
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000696config PIVOT_ROOT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000697 bool "pivot_root"
698 default n
699 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000700 The pivot_root utility swaps the mount points for the root filesystem
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000701 with some other mounted filesystem. This allows you to do all sorts
Eric Andersena0ac4522003-02-27 03:14:04 +0000702 of wild and crazy things with your Linux system and is far more
703 powerful than 'chroot'.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000704
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000705 Note: This is for initrd in linux 2.4. Under initramfs (introduced
Rob Landley0f34a822005-10-27 22:55:50 +0000706 in linux 2.6) use switch_root instead.
707
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000708config RDATE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000709 bool "rdate"
710 default n
711 help
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000712 The rdate utility allows you to synchronize the date and time of your
Eric Andersena0ac4522003-02-27 03:14:04 +0000713 system clock with the date and time of a remote networked system using
714 the RFC868 protocol, which is built into the inetd daemon on most
715 systems.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000716
Bernhard Reutner-Fischerc77e8432008-08-19 11:28:52 +0000717config RDEV
718 bool "rdev"
719 default n
720 help
721 Print the device node associated with the filesystem mounted at '/'.
722
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000723config READPROFILE
Mike Frysinger75aa1922005-09-24 23:12:38 +0000724 bool "readprofile"
725 default n
726 help
727 This allows you to parse /proc/profile for basic profiling.
728
Mike Frysinger6b160e42008-02-15 02:27:19 +0000729config RTCWAKE
730 bool "rtcwake"
731 default n
732 help
733 Enter a system sleep state until specified wakeup time.
734
Denis Vlasenko376003b2008-04-21 05:05:17 +0000735config SCRIPT
736 bool "script"
737 default n
738 help
739 The script makes typescript of terminal session.
740
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000741config SETARCH
Mike Frysinger0a6b0bf2006-02-21 04:26:52 +0000742 bool "setarch"
743 default n
744 help
745 The linux32 utility is used to create a 32bit environment for the
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000746 specified program (usually a shell). It only makes sense to have
Mike Frysinger0a6b0bf2006-02-21 04:26:52 +0000747 this util on a system that supports both 64bit and 32bit userland
748 (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...).
749
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000750config SWAPONOFF
Eric Andersenc9f20d92002-12-05 08:41:41 +0000751 bool "swaponoff"
752 default n
753 help
Eric Andersena0ac4522003-02-27 03:14:04 +0000754 This option enables both the 'swapon' and the 'swapoff' utilities.
755 Once you have created some swap space using 'mkswap', you also need
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000756 to enable your swap space with the 'swapon' utility. The 'swapoff'
Eric Andersena0ac4522003-02-27 03:14:04 +0000757 utility is used, typically at system shutdown, to disable any swap
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000758 space. If you are not using any swap space, you can leave this
Eric Andersena0ac4522003-02-27 03:14:04 +0000759 option disabled.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000760
Denis Vlasenkoee56e012008-05-18 23:05:34 +0000761config FEATURE_SWAPON_PRI
Bernhard Reutner-Fischer3576bed2008-05-19 08:25:23 +0000762 bool "Support priority option -p"
Denis Vlasenkoee56e012008-05-18 23:05:34 +0000763 default n
764 depends on SWAPONOFF
765 help
766 Enable support for setting swap device priority in swapon.
767
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000768config SWITCH_ROOT
Mike Frysinger55092282006-02-02 23:14:57 +0000769 bool "switch_root"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000770 default n
771 help
Mike Frysinger55092282006-02-02 23:14:57 +0000772 The switch_root utility is used from initramfs to select a new
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000773 root device. Under initramfs, you have to use this instead of
774 pivot_root. (Stop reading here if you don't care why.)
Eric Andersenc9f20d92002-12-05 08:41:41 +0000775
Mike Frysinger55092282006-02-02 23:14:57 +0000776 Booting with initramfs extracts a gzipped cpio archive into rootfs
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000777 (which is a variant of ramfs/tmpfs). Because rootfs can't be moved
778 or unmounted*, pivot_root will not work from initramfs. Instead,
Mike Frysinger55092282006-02-02 23:14:57 +0000779 switch_root deletes everything out of rootfs (including itself),
780 does a mount --move that overmounts rootfs with the new root, and
781 then execs the specified init program.
782
783 * Because the Linux kernel uses rootfs internally as the starting
784 and ending point for searching through the kernel's doubly linked
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000785 list of active mount points. That's why.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000786
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000787config UMOUNT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000788 bool "umount"
789 default n
790 help
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000791 When you want to remove a mounted filesystem from its current mount
792 point, for example when you are shutting down the system, the
793 'umount' utility is the tool to use. If you enabled the 'mount'
794 utility, you almost certainly also want to enable 'umount'.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000795
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000796config FEATURE_UMOUNT_ALL
Denis Vlasenko4ee7cd42008-03-17 09:13:22 +0000797 bool "Support option -a"
Rob Landleycc6d8d32006-02-08 20:06:57 +0000798 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000799 depends on UMOUNT
Rob Landleycc6d8d32006-02-08 20:06:57 +0000800 help
801 Support -a option to unmount all currently mounted filesystems.
802
Eric Andersenc9f20d92002-12-05 08:41:41 +0000803comment "Common options for mount/umount"
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000804 depends on MOUNT || UMOUNT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000805
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000806config FEATURE_MOUNT_LOOP
Rob Landley2ec922e2006-04-13 23:22:16 +0000807 bool "Support loopback mounts"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000808 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000809 depends on MOUNT || UMOUNT
Eric Andersenc9f20d92002-12-05 08:41:41 +0000810 help
Rob Landley6a6798b2005-08-10 20:35:54 +0000811 Enabling this feature allows automatic mounting of files (containing
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000812 filesystem images) via the linux kernel's loopback devices.
813 The mount command will detect you are trying to mount a file instead
814 of a block device, and transparently associate the file with a
815 loopback device. The umount command will also free that loopback
816 device.
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000817
Rob Landley6a6798b2005-08-10 20:35:54 +0000818 You can still use the 'losetup' utility (to manually associate files
Mike Frysinger71a6a4e2007-01-24 08:24:43 +0000819 with loop devices) if you need to do something advanced, such as
Rob Landley6a6798b2005-08-10 20:35:54 +0000820 specify an offset or cryptographic options to the loopback device.
821 (If you don't want umount to free the loop device, use "umount -D".)
Paul Fox3f6f3172005-07-19 20:55:37 +0000822
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000823config FEATURE_MTAB_SUPPORT
Rob Landley2ec922e2006-04-13 23:22:16 +0000824 bool "Support for the old /etc/mtab file"
Eric Andersenc9f20d92002-12-05 08:41:41 +0000825 default n
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000826 depends on MOUNT || UMOUNT
Denis Vlasenkob1d8e7d2008-02-16 23:28:42 +0000827 select FEATURE_MOUNT_FAKE
Eric Andersenc9f20d92002-12-05 08:41:41 +0000828 help
Rob Landley6a6798b2005-08-10 20:35:54 +0000829 Historically, Unix systems kept track of the currently mounted
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000830 partitions in the file "/etc/mtab". These days, the kernel exports
Rob Landley6a6798b2005-08-10 20:35:54 +0000831 the list of currently mounted partitions in "/proc/mounts", rendering
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000832 the old mtab file obsolete. (In modern systems, /etc/mtab should be
Rob Landley6a6798b2005-08-10 20:35:54 +0000833 a symlink to /proc/mounts.)
Eric Andersena0ac4522003-02-27 03:14:04 +0000834
Rob Landley6a6798b2005-08-10 20:35:54 +0000835 The only reason to have mount maintain an /etc/mtab file itself is if
836 your stripped-down embedded system does not have a /proc directory.
837 If you must use this, keep in mind it's inherently brittle (for
838 example a mount under chroot won't update it), can't handle modern
839 features like separate per-process filesystem namespaces, requires
840 that your /etc directory be writeable, tends to get easily confused
Rob Landley17507fa2006-05-08 02:22:24 +0000841 by --bind or --move mounts, won't update if you rename a directory
Bernhard Reutner-Fischer3e8669f2008-07-22 18:27:53 +0000842 that contains a mount point, and so on. (In brief: avoid.)
Rob Landley17507fa2006-05-08 02:22:24 +0000843
844 About the only reason to use this is if you've removed /proc from
845 your kernel.
Eric Andersenc9f20d92002-12-05 08:41:41 +0000846
Eric Andersenc9f20d92002-12-05 08:41:41 +0000847endmenu