| 1 | #
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| 2 | # For a description of the syntax of this configuration file,
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| 3 | # see scripts/kbuild/config-language.txt.
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| 4 | #
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| 5 |
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| 6 | menu "Linux System Utilities"
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| 7 |
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| 8 | INSERT
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| 9 |
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| 10 | config ACPID
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| 11 | bool "acpid"
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| 12 | default y
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| 13 | select PLATFORM_LINUX
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| 14 | help
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| 15 | acpid listens to ACPI events coming either in textual form from
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| 16 | /proc/acpi/event (though it is marked deprecated it is still widely
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| 17 | used and _is_ a standard) or in binary form from specified evdevs
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| 18 | (just use /dev/input/event*).
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| 19 |
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| 20 | It parses the event to retrieve ACTION and a possible PARAMETER.
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| 21 | It then spawns /etc/acpi/<ACTION>[/<PARAMETER>] either via run-parts
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| 22 | (if the resulting path is a directory) or directly as an executable.
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| 23 |
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| 24 | N.B. acpid relies on run-parts so have the latter installed.
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| 25 |
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| 26 | config FEATURE_ACPID_COMPAT
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| 27 | bool "Accept and ignore redundant options"
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| 28 | default y
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| 29 | depends on ACPID
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| 30 | help
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| 31 | Accept and ignore compatibility options -g -m -s -S -v.
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| 32 |
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| 33 | config BLKID
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| 34 | bool "blkid"
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| 35 | default y
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| 36 | select PLATFORM_LINUX
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| 37 | select VOLUMEID
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| 38 | help
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| 39 | Lists labels and UUIDs of all filesystems.
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| 40 | WARNING:
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| 41 | With all submodules selected, it will add ~8k to busybox.
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| 42 |
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| 43 | config FEATURE_BLKID_TYPE
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| 44 | bool "Print filesystem type"
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| 45 | default n
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| 46 | depends on BLKID
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| 47 | help
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| 48 | Show TYPE="filesystem type"
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| 49 |
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| 50 | config DMESG
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| 51 | bool "dmesg"
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| 52 | default y
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| 53 | select PLATFORM_LINUX
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| 54 | help
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| 55 | dmesg is used to examine or control the kernel ring buffer. When the
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| 56 | Linux kernel prints messages to the system log, they are stored in
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| 57 | the kernel ring buffer. You can use dmesg to print the kernel's ring
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| 58 | buffer, clear the kernel ring buffer, change the size of the kernel
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| 59 | ring buffer, and change the priority level at which kernel messages
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| 60 | are also logged to the system console. Enable this option if you
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| 61 | wish to enable the 'dmesg' utility.
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| 62 |
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| 63 | config FEATURE_DMESG_PRETTY
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| 64 | bool "Pretty dmesg output"
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| 65 | default y
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| 66 | depends on DMESG
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| 67 | help
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| 68 | If you wish to scrub the syslog level from the output, say 'Y' here.
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| 69 | The syslog level is a string prefixed to every line with the form
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| 70 | "<#>".
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| 71 |
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| 72 | With this option you will see:
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| 73 | # dmesg
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| 74 | Linux version 2.6.17.4 .....
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| 75 | BIOS-provided physical RAM map:
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| 76 | BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
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| 77 |
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| 78 | Without this option you will see:
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| 79 | # dmesg
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| 80 | <5>Linux version 2.6.17.4 .....
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| 81 | <6>BIOS-provided physical RAM map:
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| 82 | <6> BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
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| 83 |
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| 84 | config FBSET
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| 85 | bool "fbset"
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| 86 | default y
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| 87 | select PLATFORM_LINUX
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| 88 | help
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| 89 | fbset is used to show or change the settings of a Linux frame buffer
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| 90 | device. The frame buffer device provides a simple and unique
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| 91 | interface to access a graphics display. Enable this option
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| 92 | if you wish to enable the 'fbset' utility.
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| 93 |
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| 94 | config FEATURE_FBSET_FANCY
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| 95 | bool "Turn on extra fbset options"
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| 96 | default y
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| 97 | depends on FBSET
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| 98 | help
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| 99 | This option enables extended fbset options, allowing one to set the
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| 100 | framebuffer size, color depth, etc. interface to access a graphics
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| 101 | display. Enable this option if you wish to enable extended fbset
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| 102 | options.
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| 103 |
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| 104 | config FEATURE_FBSET_READMODE
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| 105 | bool "Turn on fbset readmode support"
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| 106 | default y
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| 107 | depends on FBSET
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| 108 | help
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| 109 | This option allows fbset to read the video mode database stored by
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| 110 | default as /etc/fb.modes, which can be used to set frame buffer
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| 111 | device to pre-defined video modes.
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| 112 |
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| 113 | config FDFLUSH
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| 114 | bool "fdflush"
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| 115 | default y
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| 116 | select PLATFORM_LINUX
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| 117 | help
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| 118 | fdflush is only needed when changing media on slightly-broken
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| 119 | removable media drives. It is used to make Linux believe that a
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| 120 | hardware disk-change switch has been actuated, which causes Linux to
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| 121 | forget anything it has cached from the previous media. If you have
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| 122 | such a slightly-broken drive, you will need to run fdflush every time
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| 123 | you change a disk. Most people have working hardware and can safely
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| 124 | leave this disabled.
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| 125 |
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| 126 | config FDFORMAT
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| 127 | bool "fdformat"
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| 128 | default y
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| 129 | select PLATFORM_LINUX
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| 130 | help
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| 131 | fdformat is used to low-level format a floppy disk.
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| 132 |
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| 133 | config FDISK
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| 134 | bool "fdisk"
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| 135 | default y
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| 136 | select PLATFORM_LINUX
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| 137 | help
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| 138 | The fdisk utility is used to divide hard disks into one or more
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| 139 | logical disks, which are generally called partitions. This utility
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| 140 | can be used to list and edit the set of partitions or BSD style
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| 141 | 'disk slices' that are defined on a hard drive.
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| 142 |
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| 143 | config FDISK_SUPPORT_LARGE_DISKS
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| 144 | bool "Support over 4GB disks"
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| 145 | default y
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| 146 | depends on FDISK
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| 147 | depends on !LFS # with LFS no special code is needed
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| 148 | help
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| 149 | Enable this option to support large disks > 4GB.
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| 150 |
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| 151 | config FEATURE_FDISK_WRITABLE
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| 152 | bool "Write support"
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| 153 | default y
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| 154 | depends on FDISK
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| 155 | help
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| 156 | Enabling this option allows you to create or change a partition table
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| 157 | and write those changes out to disk. If you leave this option
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| 158 | disabled, you will only be able to view the partition table.
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| 159 |
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| 160 | config FEATURE_AIX_LABEL
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| 161 | bool "Support AIX disklabels"
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| 162 | default n
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| 163 | depends on FDISK && FEATURE_FDISK_WRITABLE
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| 164 | help
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| 165 | Enabling this option allows you to create or change AIX disklabels.
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| 166 | Most people can safely leave this option disabled.
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| 167 |
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| 168 | config FEATURE_SGI_LABEL
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| 169 | bool "Support SGI disklabels"
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| 170 | default n
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| 171 | depends on FDISK && FEATURE_FDISK_WRITABLE
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| 172 | help
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| 173 | Enabling this option allows you to create or change SGI disklabels.
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| 174 | Most people can safely leave this option disabled.
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| 175 |
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| 176 | config FEATURE_SUN_LABEL
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| 177 | bool "Support SUN disklabels"
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| 178 | default n
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| 179 | depends on FDISK && FEATURE_FDISK_WRITABLE
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| 180 | help
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| 181 | Enabling this option allows you to create or change SUN disklabels.
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| 182 | Most people can safely leave this option disabled.
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| 183 |
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| 184 | config FEATURE_OSF_LABEL
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| 185 | bool "Support BSD disklabels"
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| 186 | default n
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| 187 | depends on FDISK && FEATURE_FDISK_WRITABLE
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| 188 | help
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| 189 | Enabling this option allows you to create or change BSD disklabels
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| 190 | and define and edit BSD disk slices.
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| 191 |
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| 192 | config FEATURE_GPT_LABEL
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| 193 | bool "Support GPT disklabels"
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| 194 | default n
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| 195 | depends on FDISK && FEATURE_FDISK_WRITABLE
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| 196 | help
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| 197 | Enabling this option allows you to view GUID Partition Table
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| 198 | disklabels.
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| 199 |
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| 200 | config FEATURE_FDISK_ADVANCED
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| 201 | bool "Support expert mode"
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| 202 | default y
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| 203 | depends on FDISK && FEATURE_FDISK_WRITABLE
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| 204 | help
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| 205 | Enabling this option allows you to do terribly unsafe things like
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| 206 | define arbitrary drive geometry, move the beginning of data in a
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| 207 | partition, and similarly evil things. Unless you have a very good
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| 208 | reason you would be wise to leave this disabled.
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| 209 |
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| 210 | config FINDFS
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| 211 | bool "findfs"
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| 212 | default y
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| 213 | select PLATFORM_LINUX
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| 214 | select VOLUMEID
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| 215 | help
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| 216 | Prints the name of a filesystem with given label or UUID.
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| 217 | WARNING:
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| 218 | With all submodules selected, it will add ~8k to busybox.
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| 219 |
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| 220 | config FLOCK
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| 221 | bool "flock"
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| 222 | default y
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| 223 | help
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| 224 | Manage locks from shell scripts
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| 225 |
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| 226 | config FREERAMDISK
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| 227 | bool "freeramdisk"
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| 228 | default y
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| 229 | select PLATFORM_LINUX
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| 230 | help
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| 231 | Linux allows you to create ramdisks. This utility allows you to
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| 232 | delete them and completely free all memory that was used for the
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| 233 | ramdisk. For example, if you boot Linux into a ramdisk and later
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| 234 | pivot_root, you may want to free the memory that is allocated to the
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| 235 | ramdisk. If you have no use for freeing memory from a ramdisk, leave
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| 236 | this disabled.
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| 237 |
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| 238 | config FSCK_MINIX
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| 239 | bool "fsck_minix"
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| 240 | default y
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| 241 | help
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| 242 | The minix filesystem is a nice, small, compact, read-write filesystem
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| 243 | with little overhead. It is not a journaling filesystem however and
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| 244 | can experience corruption if it is not properly unmounted or if the
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| 245 | power goes off in the middle of a write. This utility allows you to
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| 246 | check for and attempt to repair any corruption that occurs to a minix
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| 247 | filesystem.
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| 248 |
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| 249 | config MKFS_EXT2
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| 250 | bool "mkfs_ext2"
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| 251 | default y
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| 252 | select PLATFORM_LINUX
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| 253 | help
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| 254 | Utility to create EXT2 filesystems.
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| 255 |
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| 256 | config MKFS_MINIX
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| 257 | bool "mkfs_minix"
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| 258 | default y
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| 259 | select PLATFORM_LINUX
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| 260 | help
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| 261 | The minix filesystem is a nice, small, compact, read-write filesystem
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| 262 | with little overhead. If you wish to be able to create minix
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| 263 | filesystems this utility will do the job for you.
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| 264 |
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| 265 | config FEATURE_MINIX2
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| 266 | bool "Support Minix fs v2 (fsck_minix/mkfs_minix)"
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| 267 | default y
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| 268 | depends on FSCK_MINIX || MKFS_MINIX
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| 269 | help
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| 270 | If you wish to be able to create version 2 minix filesystems, enable
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| 271 | this. If you enabled 'mkfs_minix' then you almost certainly want to
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| 272 | be using the version 2 filesystem support.
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| 273 |
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| 274 | config MKFS_REISER
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| 275 | bool "mkfs_reiser"
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| 276 | default n
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| 277 | select PLATFORM_LINUX
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| 278 | help
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| 279 | Utility to create ReiserFS filesystems.
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| 280 | Note: this applet needs a lot of testing and polishing.
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| 281 |
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| 282 | config MKFS_VFAT
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| 283 | bool "mkfs_vfat"
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| 284 | default y
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| 285 | select PLATFORM_LINUX
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| 286 | help
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| 287 | Utility to create FAT32 filesystems.
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| 288 |
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| 289 | config GETOPT
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| 290 | bool "getopt"
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| 291 | default y
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| 292 | help
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| 293 | The getopt utility is used to break up (parse) options in command
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| 294 | lines to make it easy to write complex shell scripts that also check
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| 295 | for legal (and illegal) options. If you want to write horribly
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| 296 | complex shell scripts, or use some horribly complex shell script
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| 297 | written by others, this utility may be for you. Most people will
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| 298 | wisely leave this disabled.
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| 299 |
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| 300 | config FEATURE_GETOPT_LONG
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| 301 | bool "Support option -l"
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| 302 | default y if LONG_OPTS
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| 303 | depends on GETOPT
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| 304 | help
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| 305 | Enable support for long options (option -l).
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| 306 |
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| 307 | config HEXDUMP
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| 308 | bool "hexdump"
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| 309 | default y
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| 310 | help
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| 311 | The hexdump utility is used to display binary data in a readable
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| 312 | way that is comparable to the output from most hex editors.
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| 313 |
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| 314 | config FEATURE_HEXDUMP_REVERSE
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| 315 | bool "Support -R, reverse of 'hexdump -Cv'"
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| 316 | default y
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| 317 | depends on HEXDUMP
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| 318 | help
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| 319 | The hexdump utility is used to display binary data in an ascii
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| 320 | readable way. This option creates binary data from an ascii input.
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| 321 | NB: this option is non-standard. It's unwise to use it in scripts
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| 322 | aimed to be portable.
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| 323 |
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| 324 | config HD
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| 325 | bool "hd"
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| 326 | default y
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| 327 | depends on HEXDUMP
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| 328 | help
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| 329 | hd is an alias to hexdump -C.
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| 330 |
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| 331 | config HWCLOCK
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| 332 | bool "hwclock"
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| 333 | default y
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| 334 | select PLATFORM_LINUX
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| 335 | help
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| 336 | The hwclock utility is used to read and set the hardware clock
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| 337 | on a system. This is primarily used to set the current time on
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| 338 | shutdown in the hardware clock, so the hardware will keep the
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| 339 | correct time when Linux is _not_ running.
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| 340 |
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| 341 | config FEATURE_HWCLOCK_LONG_OPTIONS
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| 342 | bool "Support long options (--hctosys,...)"
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| 343 | default y
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| 344 | depends on HWCLOCK && LONG_OPTS
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| 345 | help
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| 346 | By default, the hwclock utility only uses short options. If you
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| 347 | are overly fond of its long options, such as --hctosys, --utc, etc)
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| 348 | then enable this option.
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| 349 |
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| 350 | config FEATURE_HWCLOCK_ADJTIME_FHS
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| 351 | bool "Use FHS /var/lib/hwclock/adjtime"
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| 352 | default n # util-linux-ng in Fedora 13 still uses /etc/adjtime
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| 353 | depends on HWCLOCK
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| 354 | help
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| 355 | Starting with FHS 2.3, the adjtime state file is supposed to exist
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| 356 | at /var/lib/hwclock/adjtime instead of /etc/adjtime. If you wish
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| 357 | to use the FHS behavior, answer Y here, otherwise answer N for the
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| 358 | classic /etc/adjtime path.
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| 359 |
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| 360 | pathname.com/fhs/pub/fhs-2.3.html#VARLIBHWCLOCKSTATEDIRECTORYFORHWCLO
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| 361 |
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| 362 | config IPCRM
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| 363 | bool "ipcrm"
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| 364 | default y
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| 365 | help
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| 366 | The ipcrm utility allows the removal of System V interprocess
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| 367 | communication (IPC) objects and the associated data structures
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| 368 | from the system.
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| 369 |
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| 370 | config IPCS
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| 371 | bool "ipcs"
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| 372 | default y
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| 373 | select PLATFORM_LINUX
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| 374 | help
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| 375 | The ipcs utility is used to provide information on the currently
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| 376 | allocated System V interprocess (IPC) objects in the system.
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| 377 |
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| 378 | config LOSETUP
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| 379 | bool "losetup"
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| 380 | default y
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| 381 | select PLATFORM_LINUX
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| 382 | help
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| 383 | losetup is used to associate or detach a loop device with a regular
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| 384 | file or block device, and to query the status of a loop device. This
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| 385 | version does not currently support enabling data encryption.
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| 386 |
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| 387 | config LSPCI
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| 388 | bool "lspci"
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| 389 | default y
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| 390 | #select PLATFORM_LINUX
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| 391 | help
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| 392 | lspci is a utility for displaying information about PCI buses in the
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| 393 | system and devices connected to them.
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| 394 |
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| 395 | This version uses sysfs (/sys/bus/pci/devices) only.
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| 396 |
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| 397 | config LSUSB
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| 398 | bool "lsusb"
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| 399 | default y
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| 400 | #select PLATFORM_LINUX
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| 401 | help
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| 402 | lsusb is a utility for displaying information about USB buses in the
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| 403 | system and devices connected to them.
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| 404 |
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| 405 | This version uses sysfs (/sys/bus/usb/devices) only.
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| 406 |
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| 407 | config MKSWAP
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| 408 | bool "mkswap"
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| 409 | default y
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| 410 | help
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| 411 | The mkswap utility is used to configure a file or disk partition as
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| 412 | Linux swap space. This allows Linux to use the entire file or
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| 413 | partition as if it were additional RAM, which can greatly increase
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| 414 | the capability of low-memory machines. This additional memory is
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| 415 | much slower than real RAM, but can be very helpful at preventing your
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| 416 | applications being killed by the Linux out of memory (OOM) killer.
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| 417 | Once you have created swap space using 'mkswap' you need to enable
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| 418 | the swap space using the 'swapon' utility.
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| 419 |
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| 420 | config FEATURE_MKSWAP_UUID
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| 421 | bool "UUID support"
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| 422 | default y
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| 423 | depends on MKSWAP
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| 424 | help
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| 425 | Generate swap spaces with universally unique identifiers.
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| 426 |
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| 427 | config MORE
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| 428 | bool "more"
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| 429 | default y
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| 430 | help
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| 431 | more is a simple utility which allows you to read text one screen
|
|---|
| 432 | sized page at a time. If you want to read text that is larger than
|
|---|
| 433 | the screen, and you are using anything faster than a 300 baud modem,
|
|---|
| 434 | you will probably find this utility very helpful. If you don't have
|
|---|
| 435 | any need to reading text files, you can leave this disabled.
|
|---|
| 436 |
|
|---|
| 437 | config PIVOT_ROOT
|
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| 438 | bool "pivot_root"
|
|---|
| 439 | default y
|
|---|
| 440 | select PLATFORM_LINUX
|
|---|
| 441 | help
|
|---|
| 442 | The pivot_root utility swaps the mount points for the root filesystem
|
|---|
| 443 | with some other mounted filesystem. This allows you to do all sorts
|
|---|
| 444 | of wild and crazy things with your Linux system and is far more
|
|---|
| 445 | powerful than 'chroot'.
|
|---|
| 446 |
|
|---|
| 447 | Note: This is for initrd in linux 2.4. Under initramfs (introduced
|
|---|
| 448 | in linux 2.6) use switch_root instead.
|
|---|
| 449 |
|
|---|
| 450 | config RDATE
|
|---|
| 451 | bool "rdate"
|
|---|
| 452 | default y
|
|---|
| 453 | help
|
|---|
| 454 | The rdate utility allows you to synchronize the date and time of your
|
|---|
| 455 | system clock with the date and time of a remote networked system using
|
|---|
| 456 | the RFC868 protocol, which is built into the inetd daemon on most
|
|---|
| 457 | systems.
|
|---|
| 458 |
|
|---|
| 459 | config RDEV
|
|---|
| 460 | bool "rdev"
|
|---|
| 461 | default y
|
|---|
| 462 | help
|
|---|
| 463 | Print the device node associated with the filesystem mounted at '/'.
|
|---|
| 464 |
|
|---|
| 465 | config READPROFILE
|
|---|
| 466 | bool "readprofile"
|
|---|
| 467 | default y
|
|---|
| 468 | #select PLATFORM_LINUX
|
|---|
| 469 | help
|
|---|
| 470 | This allows you to parse /proc/profile for basic profiling.
|
|---|
| 471 |
|
|---|
| 472 | config RTCWAKE
|
|---|
| 473 | bool "rtcwake"
|
|---|
| 474 | default y
|
|---|
| 475 | select PLATFORM_LINUX
|
|---|
| 476 | help
|
|---|
| 477 | Enter a system sleep state until specified wakeup time.
|
|---|
| 478 |
|
|---|
| 479 | config SCRIPT
|
|---|
| 480 | bool "script"
|
|---|
| 481 | default y
|
|---|
| 482 | help
|
|---|
| 483 | The script makes typescript of terminal session.
|
|---|
| 484 |
|
|---|
| 485 | config SCRIPTREPLAY
|
|---|
| 486 | bool "scriptreplay"
|
|---|
| 487 | default y
|
|---|
| 488 | help
|
|---|
| 489 | This program replays a typescript, using timing information
|
|---|
| 490 | given by script -t.
|
|---|
| 491 |
|
|---|
| 492 | config SWAPONOFF
|
|---|
| 493 | bool "swaponoff"
|
|---|
| 494 | default y
|
|---|
| 495 | select PLATFORM_LINUX
|
|---|
| 496 | help
|
|---|
| 497 | This option enables both the 'swapon' and the 'swapoff' utilities.
|
|---|
| 498 | Once you have created some swap space using 'mkswap', you also need
|
|---|
| 499 | to enable your swap space with the 'swapon' utility. The 'swapoff'
|
|---|
| 500 | utility is used, typically at system shutdown, to disable any swap
|
|---|
| 501 | space. If you are not using any swap space, you can leave this
|
|---|
| 502 | option disabled.
|
|---|
| 503 |
|
|---|
| 504 | config FEATURE_SWAPON_DISCARD
|
|---|
| 505 | bool "Support discard option -d"
|
|---|
| 506 | default y
|
|---|
| 507 | depends on SWAPONOFF
|
|---|
| 508 | help
|
|---|
| 509 | Enable support for discarding swap area blocks at swapon and/or as
|
|---|
| 510 | the kernel frees them. This option enables both the -d option on
|
|---|
| 511 | 'swapon' and the 'discard' option for swap entries in /etc/fstab.
|
|---|
| 512 |
|
|---|
| 513 | config FEATURE_SWAPON_PRI
|
|---|
| 514 | bool "Support priority option -p"
|
|---|
| 515 | default y
|
|---|
| 516 | depends on SWAPONOFF
|
|---|
| 517 | help
|
|---|
| 518 | Enable support for setting swap device priority in swapon.
|
|---|
| 519 |
|
|---|
| 520 | config SWITCH_ROOT
|
|---|
| 521 | bool "switch_root"
|
|---|
| 522 | default y
|
|---|
| 523 | select PLATFORM_LINUX
|
|---|
| 524 | help
|
|---|
| 525 | The switch_root utility is used from initramfs to select a new
|
|---|
| 526 | root device. Under initramfs, you have to use this instead of
|
|---|
| 527 | pivot_root. (Stop reading here if you don't care why.)
|
|---|
| 528 |
|
|---|
| 529 | Booting with initramfs extracts a gzipped cpio archive into rootfs
|
|---|
| 530 | (which is a variant of ramfs/tmpfs). Because rootfs can't be moved
|
|---|
| 531 | or unmounted*, pivot_root will not work from initramfs. Instead,
|
|---|
| 532 | switch_root deletes everything out of rootfs (including itself),
|
|---|
| 533 | does a mount --move that overmounts rootfs with the new root, and
|
|---|
| 534 | then execs the specified init program.
|
|---|
| 535 |
|
|---|
| 536 | * Because the Linux kernel uses rootfs internally as the starting
|
|---|
| 537 | and ending point for searching through the kernel's doubly linked
|
|---|
| 538 | list of active mount points. That's why.
|
|---|
| 539 |
|
|---|
| 540 | config UMOUNT
|
|---|
| 541 | bool "umount"
|
|---|
| 542 | default y
|
|---|
| 543 | select PLATFORM_LINUX
|
|---|
| 544 | help
|
|---|
| 545 | When you want to remove a mounted filesystem from its current mount
|
|---|
| 546 | point, for example when you are shutting down the system, the
|
|---|
| 547 | 'umount' utility is the tool to use. If you enabled the 'mount'
|
|---|
| 548 | utility, you almost certainly also want to enable 'umount'.
|
|---|
| 549 |
|
|---|
| 550 | config FEATURE_UMOUNT_ALL
|
|---|
| 551 | bool "Support option -a"
|
|---|
| 552 | default y
|
|---|
| 553 | depends on UMOUNT
|
|---|
| 554 | help
|
|---|
| 555 | Support -a option to unmount all currently mounted filesystems.
|
|---|
| 556 |
|
|---|
| 557 | comment "Common options for mount/umount"
|
|---|
| 558 | depends on MOUNT || UMOUNT
|
|---|
| 559 |
|
|---|
| 560 | config FEATURE_MOUNT_LOOP
|
|---|
| 561 | bool "Support loopback mounts"
|
|---|
| 562 | default y
|
|---|
| 563 | depends on MOUNT || UMOUNT
|
|---|
| 564 | help
|
|---|
| 565 | Enabling this feature allows automatic mounting of files (containing
|
|---|
| 566 | filesystem images) via the linux kernel's loopback devices.
|
|---|
| 567 | The mount command will detect you are trying to mount a file instead
|
|---|
| 568 | of a block device, and transparently associate the file with a
|
|---|
| 569 | loopback device. The umount command will also free that loopback
|
|---|
| 570 | device.
|
|---|
| 571 |
|
|---|
| 572 | You can still use the 'losetup' utility (to manually associate files
|
|---|
| 573 | with loop devices) if you need to do something advanced, such as
|
|---|
| 574 | specify an offset or cryptographic options to the loopback device.
|
|---|
| 575 | (If you don't want umount to free the loop device, use "umount -D".)
|
|---|
| 576 |
|
|---|
| 577 | config FEATURE_MOUNT_LOOP_CREATE
|
|---|
| 578 | bool "Create new loopback devices if needed"
|
|---|
| 579 | default y
|
|---|
| 580 | depends on FEATURE_MOUNT_LOOP
|
|---|
| 581 | help
|
|---|
| 582 | Linux kernels >= 2.6.24 support unlimited loopback devices. They are
|
|---|
| 583 | allocated for use when trying to use a loop device. The loop device
|
|---|
| 584 | must however exist.
|
|---|
| 585 |
|
|---|
| 586 | This feature lets mount to try to create next /dev/loopN device
|
|---|
| 587 | if it does not find a free one.
|
|---|
| 588 |
|
|---|
| 589 | config FEATURE_MTAB_SUPPORT
|
|---|
| 590 | bool "Support for the old /etc/mtab file"
|
|---|
| 591 | default n
|
|---|
| 592 | depends on MOUNT || UMOUNT
|
|---|
| 593 | select FEATURE_MOUNT_FAKE
|
|---|
| 594 | help
|
|---|
| 595 | Historically, Unix systems kept track of the currently mounted
|
|---|
| 596 | partitions in the file "/etc/mtab". These days, the kernel exports
|
|---|
| 597 | the list of currently mounted partitions in "/proc/mounts", rendering
|
|---|
| 598 | the old mtab file obsolete. (In modern systems, /etc/mtab should be
|
|---|
| 599 | a symlink to /proc/mounts.)
|
|---|
| 600 |
|
|---|
| 601 | The only reason to have mount maintain an /etc/mtab file itself is if
|
|---|
| 602 | your stripped-down embedded system does not have a /proc directory.
|
|---|
| 603 | If you must use this, keep in mind it's inherently brittle (for
|
|---|
| 604 | example a mount under chroot won't update it), can't handle modern
|
|---|
| 605 | features like separate per-process filesystem namespaces, requires
|
|---|
| 606 | that your /etc directory be writable, tends to get easily confused
|
|---|
| 607 | by --bind or --move mounts, won't update if you rename a directory
|
|---|
| 608 | that contains a mount point, and so on. (In brief: avoid.)
|
|---|
| 609 |
|
|---|
| 610 | About the only reason to use this is if you've removed /proc from
|
|---|
| 611 | your kernel.
|
|---|
| 612 |
|
|---|
| 613 | source util-linux/volume_id/Config.in
|
|---|
| 614 |
|
|---|
| 615 | endmenu
|
|---|
