X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/a533c528599e2d75536320755e0a4dca126087c5..ccf3bdc4a6309f23aa80e643b4b4c734ab4100ca:/package/busybox/config/util-linux/Config.in?ds=sidebyside diff --git a/package/busybox/config/util-linux/Config.in b/package/busybox/config/util-linux/Config.in index af4735857..5c5af20e5 100644 --- a/package/busybox/config/util-linux/Config.in +++ b/package/busybox/config/util-linux/Config.in @@ -5,7 +5,6 @@ menu "Linux System Utilities" - config BUSYBOX_CONFIG_DMESG bool "dmesg" default y @@ -18,6 +17,26 @@ config BUSYBOX_CONFIG_DMESG are also logged to the system console. Enable this option if you wish to enable the 'dmesg' utility. +config BUSYBOX_CONFIG_FEATURE_DMESG_PRETTY + bool "Pretty dmesg output" + default y + depends on BUSYBOX_CONFIG_DMESG + help + If you wish to scrub the syslog level from the output, say 'Y' here. + The syslog level is a string prefixed to every line with the form "<#>". + + With this option you will see: + # dmesg + Linux version 2.6.17.4 ..... + BIOS-provided physical RAM map: + BIOS-e820: 0000000000000000 - 000000000009f000 (usable) + + Without this option you will see: + # dmesg + <5>Linux version 2.6.17.4 ..... + <6>BIOS-provided physical RAM map: + <6> BIOS-e820: 0000000000000000 - 000000000009f000 (usable) + config BUSYBOX_CONFIG_FBSET bool "fbset" default n @@ -27,9 +46,8 @@ config BUSYBOX_CONFIG_FBSET interface to access a graphics display. Enable this option if you wish to enable the 'fbset' utility. - config BUSYBOX_CONFIG_FEATURE_FBSET_FANCY - bool " Turn on extra fbset options" + bool "Turn on extra fbset options" default n depends on BUSYBOX_CONFIG_FBSET help @@ -39,7 +57,7 @@ config BUSYBOX_CONFIG_FEATURE_FBSET_FANCY options. config BUSYBOX_CONFIG_FEATURE_FBSET_READMODE - bool " Turn on fbset readmode support" + bool "Turn on fbset readmode support" default n depends on BUSYBOX_CONFIG_FBSET help @@ -74,15 +92,15 @@ config BUSYBOX_CONFIG_FDISK can be used to list and edit the set of partitions or BSD style 'disk slices' that are defined on a hard drive. -config BUSYBOX_FDISK_SUPPORT_LARGE_DISKS - bool +config BUSYBOX_CONFIG_FDISK_SUPPORT_LARGE_DISKS + bool "Support over 4GB disks" default y depends on BUSYBOX_CONFIG_FDISK help Enable this option to support large disks > 4GB. config BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE - bool " Write support" + bool "Write support" default n depends on BUSYBOX_CONFIG_FDISK help @@ -91,7 +109,7 @@ config BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE disabled, you will only be able to view the partition table. config BUSYBOX_CONFIG_FEATURE_AIX_LABEL - bool " Support AIX disklabels" + bool "Support AIX disklabels" default n depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE help @@ -99,7 +117,7 @@ config BUSYBOX_CONFIG_FEATURE_AIX_LABEL Most people can safely leave this option disabled. config BUSYBOX_CONFIG_FEATURE_SGI_LABEL - bool " Support SGI disklabels" + bool "Support SGI disklabels" default n depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE help @@ -107,15 +125,15 @@ config BUSYBOX_CONFIG_FEATURE_SGI_LABEL Most people can safely leave this option disabled. config BUSYBOX_CONFIG_FEATURE_SUN_LABEL - bool " Support SUN disklabels" + bool "Support SUN disklabels" default n - depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE + depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE help Enabling this option allows you to create or change SUN disklabels. Most people can safely leave this option disabled. config BUSYBOX_CONFIG_FEATURE_OSF_LABEL - bool " Support BSD disklabels" + bool "Support BSD disklabels" default n depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE help @@ -123,7 +141,7 @@ config BUSYBOX_CONFIG_FEATURE_OSF_LABEL and define and edit BSD disk slices. config BUSYBOX_CONFIG_FEATURE_FDISK_ADVANCED - bool " Support expert mode" + bool "Support expert mode" default n depends on BUSYBOX_CONFIG_FDISK && BUSYBOX_CONFIG_FEATURE_FDISK_WRITABLE help @@ -132,6 +150,17 @@ config BUSYBOX_CONFIG_FEATURE_FDISK_ADVANCED partition, and similarly evil things. Unless you have a very good reason you would be wise to leave this disabled. +config BUSYBOX_CONFIG_FINDFS + bool "findfs" + default n + select BUSYBOX_CONFIG_VOLUMEID + help + This is similar to the findfs program that is part of the e2fsprogs + package. However, the e2fsprogs version only support ext2/3. This + version supports those in addition to FAT, swap, and ReiserFS. + WARNING: + With all submodules selected, it will add ~8k to busybox. + config BUSYBOX_CONFIG_FREERAMDISK bool "freeramdisk" default n @@ -163,10 +192,10 @@ config BUSYBOX_CONFIG_MKFS_MINIX this utility will do the job for you. comment "Minix filesystem support" - depends on BUSYBOX_CONFIG_FSCK_MINIX || BUSYBOX_CONFIG_MKFS_MINIX + depends on BUSYBOX_CONFIG_FSCK_MINIX || BUSYBOX_CONFIG_MKFS_MINIX config BUSYBOX_CONFIG_FEATURE_MINIX2 - bool " Support Minix fs v2 (fsck_minix/mkfs_minix)" + bool "Support Minix fs v2 (fsck_minix/mkfs_minix)" default n depends on BUSYBOX_CONFIG_FSCK_MINIX || BUSYBOX_CONFIG_MKFS_MINIX help @@ -192,24 +221,70 @@ config BUSYBOX_CONFIG_HEXDUMP The hexdump utility is used to display binary data in a readable way that is comparable to the output from most hex editors. +config BUSYBOX_CONFIG_FEATURE_HEXDUMP_REVERSE + bool "Support -R, reverse of 'hexdump -Cv'" + default n + depends on BUSYBOX_CONFIG_HEXDUMP + help + The hexdump utility is used to display binary data in an ascii + readable way. This option creates binary data from an ascii input. + NB: this option is non-standard. It's unwise to use it in scripts + aimed to be portable. + +config BUSYBOX_CONFIG_HD + bool "hd" + default n + select BUSYBOX_CONFIG_HEXDUMP + help + hd is an alias to hexdump -C. + config BUSYBOX_CONFIG_HWCLOCK bool "hwclock" - default n + default y help The hwclock utility is used to read and set the hardware clock on a system. This is primarily used to set the current time on shutdown in the hardware clock, so the hardware will keep the correct time when Linux is _not_ running. -config BUSYBOX_CONFIG_FEATURE_HWCLOCK_LONGOPTIONS - bool " Support long options (--hctosys,...)" +config BUSYBOX_CONFIG_FEATURE_HWCLOCK_LONG_OPTIONS + bool "Support long options (--hctosys,...)" default n - depends on BUSYBOX_CONFIG_HWCLOCK + depends on BUSYBOX_CONFIG_HWCLOCK && BUSYBOX_CONFIG_GETOPT_LONG help By default, the hwclock utility only uses short options. If you are overly fond of its long options, such as --hctosys, --utc, etc) then enable this option. +config BUSYBOX_CONFIG_FEATURE_HWCLOCK_ADJTIME_FHS + bool "Use FHS /var/lib/hwclock/adjtime" + default n + depends on BUSYBOX_CONFIG_HWCLOCK + help + Starting with FHS 2.3, the adjtime state file is supposed to exist + at /var/lib/hwclock/adjtime instead of /etc/adjtime. If you wish + to use the FHS behavior, answer Y here, otherwise answer N for the + classic /etc/adjtime path. + + http://www.pathname.com/fhs/pub/fhs-2.3.html#VARLIBHWCLOCKSTATEDIRECTORYFORHWCLO + +config BUSYBOX_CONFIG_IPCRM + bool "ipcrm" + default n + select BUSYBOX_CONFIG_FEATURE_SUID + help + The ipcrm utility allows the removal of System V interprocess + communication (IPC) objects and the associated data structures + from the system. + +config BUSYBOX_CONFIG_IPCS + bool "ipcs" + default n + select BUSYBOX_CONFIG_FEATURE_SUID + help + The ipcs utility is used to provide information on the currently + allocated System V interprocess (IPC) objects in the system. + config BUSYBOX_CONFIG_LOSETUP bool "losetup" default n @@ -218,6 +293,62 @@ config BUSYBOX_CONFIG_LOSETUP file or block device, and to query the status of a loop device. This version does not currently support enabling data encryption. +config BUSYBOX_CONFIG_MDEV + bool "mdev" + default n + help + mdev is a mini-udev implementation for dynamically creating device + nodes in the /dev directory. + + For more information, please see docs/mdev.txt + +config BUSYBOX_CONFIG_FEATURE_MDEV_CONF + bool "Support /etc/mdev.conf" + default n + depends on BUSYBOX_CONFIG_MDEV + help + Add support for the mdev config file to control ownership and + permissions of the device nodes. + + For more information, please see docs/mdev.txt + +config BUSYBOX_CONFIG_FEATURE_MDEV_RENAME + bool "Support subdirs/symlinks" + default n + depends on BUSYBOX_CONFIG_FEATURE_MDEV_CONF + help + Add support for renaming devices and creating symlinks. + + For more information, please see docs/mdev.txt + +config BUSYBOX_CONFIG_FEATURE_MDEV_RENAME_REGEXP + bool "Support regular expressions substitutions when renaming device" + default n + depends on BUSYBOX_CONFIG_FEATURE_MDEV_RENAME + help + Add support for regular expressions substitutions when renaming device. + +config BUSYBOX_CONFIG_FEATURE_MDEV_EXEC + bool "Support command execution at device addition/removal" + default n + depends on BUSYBOX_CONFIG_FEATURE_MDEV_CONF + help + This adds support for an optional field to /etc/mdev.conf for + executing commands when devices are created/removed. + + For more information, please see docs/mdev.txt + +config BUSYBOX_CONFIG_FEATURE_MDEV_LOAD_FIRMWARE + bool "Support loading of firmwares" + default n + depends on BUSYBOX_CONFIG_MDEV + help + Some devices need to load firmware before they can be usable. + + These devices will request userspace look up the files in + /lib/firmware/ and if it exists, send it to the kernel for + loading into the hardware. + config BUSYBOX_CONFIG_MKSWAP bool "mkswap" default n @@ -231,9 +362,19 @@ config BUSYBOX_CONFIG_MKSWAP Once you have created swap space using 'mkswap' you need to enable the swap space using the 'swapon' utility. +config BUSYBOX_CONFIG_FEATURE_MKSWAP_V0 + bool "Version 0 support" + default n + depends on BUSYBOX_CONFIG_MKSWAP +# depends on MKSWAP && BUSYBOX_CONFIG_DEPRECATED + help + Enable support for the old v0 style. + If your kernel is older than 2.1.117, then v0 support is the + only option. + config BUSYBOX_CONFIG_MORE bool "more" - default y + default n help more is a simple utility which allows you to read text one screen sized page at a time. If you want to read text that is larger than @@ -242,9 +383,9 @@ config BUSYBOX_CONFIG_MORE any need to reading text files, you can leave this disabled. config BUSYBOX_CONFIG_FEATURE_USE_TERMIOS - bool " Use termios to manipulate the screen" - default y - depends on BUSYBOX_CONFIG_MORE + bool "Use termios to manipulate the screen" + default n + depends on BUSYBOX_CONFIG_MORE || BUSYBOX_CONFIG_TOP help This option allows utilities such as 'more' and 'top' to determine the size of the screen. If you leave this disabled, your utilities @@ -252,6 +393,297 @@ config BUSYBOX_CONFIG_FEATURE_USE_TERMIOS will be unable to determine the current screen size, and will be unable to move the cursor. +config BUSYBOX_CONFIG_VOLUMEID + bool "Routines for detecting label and uuid on common filesystems" + default n + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_EXT + bool "Ext filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_REISERFS + bool "Reiser filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_FAT + bool "fat filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_HFS + bool "hfs filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_JFS + bool "jfs filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +### config FEATURE_VOLUMEID_UFS +### bool "ufs filesystem" +### default n +### depends on VOLUMEID +### help +### TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_XFS + bool "xfs filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_NTFS + bool "ntfs filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_ISO9660 + bool "iso9660 filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_UDF + bool "udf filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_LUKS + bool "luks filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_LINUXSWAP + bool "linux swap filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +### config FEATURE_VOLUMEID_LVM +### bool "lvm" +### default n +### depends on VOLUMEID +### help +### TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_CRAMFS + bool "cramfs filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +### config FEATURE_VOLUMEID_HPFS +### bool "hpfs filesystem" +### default n +### depends on VOLUMEID +### help +### TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_ROMFS + bool "romfs filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_SYSV + bool "sysv filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +### config FEATURE_VOLUMEID_MINIX +### bool "minix filesystem" +### default n +### depends on VOLUMEID +### help +### TODO + +### These only detect partition tables - not used (yet?) +### config FEATURE_VOLUMEID_MAC +### bool "mac filesystem" +### default n +### depends on VOLUMEID +### help +### TODO +### +### config FEATURE_VOLUMEID_MSDOS +### bool "msdos filesystem" +### default n +### depends on VOLUMEID +### help +### TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_OCFS2 + bool "ocfs2 filesystem" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +### config FEATURE_VOLUMEID_HIGHPOINTRAID +### bool "highpoint raid" +### default n +### depends on VOLUMEID +### help +### TODO + +### config FEATURE_VOLUMEID_ISWRAID +### bool "intel raid" +### default n +### depends on VOLUMEID +### help +### TODO + +### config FEATURE_VOLUMEID_LSIRAID +### bool "lsi raid" +### default n +### depends on VOLUMEID +### help +### TODO + +### config FEATURE_VOLUMEID_VIARAID +### bool "via raid" +### default n +### depends on VOLUMEID +### help +### TODO + +### config FEATURE_VOLUMEID_SILICONRAID +### bool "silicon raid" +### default n +### depends on VOLUMEID +### help +### TODO + +### config FEATURE_VOLUMEID_NVIDIARAID +### bool "nvidia raid" +### default n +### depends on VOLUMEID +### help +### TODO + +### config FEATURE_VOLUMEID_PROMISERAID +### bool "promise raid" +### default n +### depends on VOLUMEID +### help +### TODO + +config BUSYBOX_CONFIG_FEATURE_VOLUMEID_LINUXRAID + bool "linuxraid" + default n + depends on BUSYBOX_CONFIG_VOLUMEID + help + TODO + +config BUSYBOX_CONFIG_MOUNT + bool "mount" + default y + help + All files and filesystems in Unix are arranged into one big directory + tree. The 'mount' utility is used to graft a filesystem onto a + particular part of the tree. A filesystem can either live on a block + device, or it can be accessible over the network, as is the case with + NFS filesystems. Most people using BusyBox will also want to enable + the 'mount' utility. + +config BUSYBOX_CONFIG_FEATURE_MOUNT_FAKE + bool "Support option -f" + default n + depends on BUSYBOX_CONFIG_MOUNT + help + Enable support for faking a file system mount. + +config BUSYBOX_CONFIG_FEATURE_MOUNT_VERBOSE + bool "Support option -v" + default n + depends on BUSYBOX_CONFIG_MOUNT + help + Enable multi-level -v[vv...] verbose messages. Useful if you + debug mount problems and want to see what is exactly passed + to the kernel. + +config BUSYBOX_CONFIG_FEATURE_MOUNT_HELPERS + bool "Support mount helpers" + default n + depends on BUSYBOX_CONFIG_MOUNT + help + Enable mounting of virtual file systems via external helpers. + E.g. "mount obexfs#-b00.11.22.33.44.55 /mnt" will in effect call + "obexfs -b00.11.22.33.44.55 /mnt" + Also "mount -t sometype [-o opts] fs /mnt" will try + "sometype [-o opts] fs /mnt" if simple mount syscall fails. + The idea is to use such virtual filesystems in /etc/fstab. + +config BUSYBOX_CONFIG_FEATURE_MOUNT_LABEL + bool "Support specifiying devices by label or UUID" + default n + depends on BUSYBOX_CONFIG_MOUNT + select BUSYBOX_CONFIG_VOLUMEID + help + This allows for specifying a device by label or uuid, rather than by + name. This feature utilizes the same functionality as findfs. + +config BUSYBOX_CONFIG_FEATURE_MOUNT_NFS + bool "Support mounting NFS file systems" + default y + depends on BUSYBOX_CONFIG_MOUNT + select BUSYBOX_CONFIG_FEATURE_HAVE_RPC + select BUSYBOX_CONFIG_FEATURE_SYSLOG + help + Enable mounting of NFS file systems. + +config BUSYBOX_CONFIG_FEATURE_MOUNT_CIFS + bool "Support mounting CIFS/SMB file systems" + default y + depends on BUSYBOX_CONFIG_MOUNT + help + Enable support for samba mounts. + +config BUSYBOX_CONFIG_FEATURE_MOUNT_FLAGS + depends on BUSYBOX_CONFIG_MOUNT + bool "Support lots of -o flags in mount" + default y + help + Without this, mount only supports ro/rw/remount. With this, it + supports nosuid, suid, dev, nodev, exec, noexec, sync, async, atime, + noatime, diratime, nodiratime, loud, bind, move, shared, slave, + private, unbindable, rshared, rslave, rprivate, and runbindable. + +config BUSYBOX_CONFIG_FEATURE_MOUNT_FSTAB + depends on BUSYBOX_CONFIG_MOUNT + bool "Support /etc/fstab and -a" + default y + help + Support mount all and looking for files in /etc/fstab. + config BUSYBOX_CONFIG_PIVOT_ROOT bool "pivot_root" default y @@ -261,6 +693,9 @@ config BUSYBOX_CONFIG_PIVOT_ROOT of wild and crazy things with your Linux system and is far more powerful than 'chroot'. + Note: This is for initrd in linux 2.4. Under initramfs (introduced + in linux 2.6) use switch_root instead. + config BUSYBOX_CONFIG_RDATE bool "rdate" default y @@ -270,6 +705,33 @@ config BUSYBOX_CONFIG_RDATE the RFC868 protocol, which is built into the inetd daemon on most systems. +config BUSYBOX_CONFIG_READPROFILE + bool "readprofile" + default n + help + This allows you to parse /proc/profile for basic profiling. + +config BUSYBOX_CONFIG_RTCWAKE + bool "rtcwake" + default n + help + Enter a system sleep state until specified wakeup time. + +config BUSYBOX_CONFIG_SCRIPT + bool "script" + default n + help + The script makes typescript of terminal session. + +config BUSYBOX_CONFIG_SETARCH + bool "setarch" + default n + help + The linux32 utility is used to create a 32bit environment for the + specified program (usually a shell). It only makes sense to have + this util on a system that supports both 64bit and 32bit userland + (like amd64/x86, ppc64/ppc, sparc64/sparc, etc...). + config BUSYBOX_CONFIG_SWAPONOFF bool "swaponoff" default n @@ -281,23 +743,31 @@ config BUSYBOX_CONFIG_SWAPONOFF space. If you are not using any swap space, you can leave this option disabled. -config BUSYBOX_CONFIG_MOUNT - bool "mount" - default y +config BUSYBOX_CONFIG_FEATURE_SWAPON_PRI + bool "Support priority option -p" + default n + depends on BUSYBOX_CONFIG_SWAPONOFF help - All files and filesystems in Unix are arranged into one big directory - tree. The 'mount' utility is used to graft a filesystem onto a - particular part of the tree. A filesystem can either live on a block - device, or it can be accessible over the network, as is the case with - NFS filesystems. Most people using BusyBox will also want to enable - the 'mount' utility. + Enable support for setting swap device priority in swapon. -config BUSYBOX_FEATURE_MOUNT_NFS - bool " Support mounting NFS file systems" +config BUSYBOX_CONFIG_SWITCH_ROOT + bool "switch_root" default y - depends on BUSYBOX_CONFIG_MOUNT help - Enable mounting of NFS file systems. + The switch_root utility is used from initramfs to select a new + root device. Under initramfs, you have to use this instead of + pivot_root. (Stop reading here if you don't care why.) + + Booting with initramfs extracts a gzipped cpio archive into rootfs + (which is a variant of ramfs/tmpfs). Because rootfs can't be moved + or unmounted*, pivot_root will not work from initramfs. Instead, + switch_root deletes everything out of rootfs (including itself), + does a mount --move that overmounts rootfs with the new root, and + then execs the specified init program. + + * Because the Linux kernel uses rootfs internally as the starting + and ending point for searching through the kernel's doubly linked + list of active mount points. That's why. config BUSYBOX_CONFIG_UMOUNT bool "umount" @@ -308,50 +778,54 @@ config BUSYBOX_CONFIG_UMOUNT the tool to use. If you enabled the 'mount' utility, you almost certainly also want to enable 'umount'. -config BUSYBOX_CONFIG_FEATURE_MOUNT_FORCE - bool " Support forced filesystem unmounting" +config BUSYBOX_CONFIG_FEATURE_UMOUNT_ALL + bool "Support option -a" default y depends on BUSYBOX_CONFIG_UMOUNT help - This allows you to _force_ a filesystem to be umounted. This is generally - only useful when you want to get rid of an unreachable NFS system. + Support -a option to unmount all currently mounted filesystems. comment "Common options for mount/umount" depends on BUSYBOX_CONFIG_MOUNT || BUSYBOX_CONFIG_UMOUNT config BUSYBOX_CONFIG_FEATURE_MOUNT_LOOP - bool " Support for loop devices" + bool "Support loopback mounts" default y depends on BUSYBOX_CONFIG_MOUNT || BUSYBOX_CONFIG_UMOUNT help - Enabling this feature allows mount to use the '-o' loop options, - which lets you loop mount files. Mount will automagically setup and - free the necessary loop devices so you do not need to mess with the - 'losetup' utility unless you really want to. This is really - only useful if you plan to loop mount files. + Enabling this feature allows automatic mounting of files (containing + filesystem images) via the linux kernel's loopback devices. The mount + command will detect you are trying to mount a file instead of a block + device, and transparently associate the file with a loopback device. + The umount command will also free that loopback device. + + You can still use the 'losetup' utility (to manually associate files + with loop devices) if you need to do something advanced, such as + specify an offset or cryptographic options to the loopback device. + (If you don't want umount to free the loop device, use "umount -D".) config BUSYBOX_CONFIG_FEATURE_MTAB_SUPPORT - bool " Support for a real /etc/mtab (instead of /proc/mounts)" + bool "Support for the old /etc/mtab file" default n depends on BUSYBOX_CONFIG_MOUNT || BUSYBOX_CONFIG_UMOUNT - help - If your root filesystem is writable and you wish to have the 'mount' - utility create an mtab file listing the filesystems which have been - mounted then you should enable this option. Most people that use - BusyBox have a read-only root filesystem, so they will leave this - option disabled and BusyBox will use the /proc/mounts file. - -config BUSYBOX_CONFIG_FEATURE_MTAB_FILENAME - string " mtab file location" - default n - depends on BUSYBOX_CONFIG_FEATURE_MTAB_SUPPORT - help - Some people have a read only root filesystem, but they also wish to - have the 'mount' utility create an mtab file listing the filesystems - which have been mounted. This option allows you to specify an alternative - location for the mtab file, such as /var/mtab, or /tmp/mtab. The default - value is /etc/mtab, which is where this file is located on most desktop - Linux systems. + select BUSYBOX_CONFIG_FEATURE_MOUNT_FAKE + help + Historically, Unix systems kept track of the currently mounted + partitions in the file "/etc/mtab". These days, the kernel exports + the list of currently mounted partitions in "/proc/mounts", rendering + the old mtab file obsolete. (In modern systems, /etc/mtab should be + a symlink to /proc/mounts.) + + The only reason to have mount maintain an /etc/mtab file itself is if + your stripped-down embedded system does not have a /proc directory. + If you must use this, keep in mind it's inherently brittle (for + example a mount under chroot won't update it), can't handle modern + features like separate per-process filesystem namespaces, requires + that your /etc directory be writeable, tends to get easily confused + by --bind or --move mounts, won't update if you rename a directory + that contains a mount point, and so on. (In brief: avoid.) + + About the only reason to use this is if you've removed /proc from + your kernel. endmenu -