LXR busybox/util-linux/Config.src

   1#
   2# For a description of the syntax of this configuration file,
   3# see docs/Kconfig-language.txt.
   4#
   5
   6menu "Linux System Utilities"
   7
   8INSERT
   9
  10comment "Common options for mount/umount"
  11        depends on MOUNT || UMOUNT
  12
  13config FEATURE_MOUNT_LOOP
  14        bool "Support loopback mounts"
  15        default y
  16        depends on MOUNT || UMOUNT
  17        help
  18        Enabling this feature allows automatic mounting of files (containing
  19        filesystem images) via the linux kernel's loopback devices.
  20        The mount command will detect you are trying to mount a file instead
  21        of a block device, and transparently associate the file with a
  22        loopback device. The umount command will also free that loopback
  23        device.
  24
  25        You can still use the 'losetup' utility (to manually associate files
  26        with loop devices) if you need to do something advanced, such as
  27        specify an offset or cryptographic options to the loopback device.
  28        (If you don't want umount to free the loop device, use "umount -D".)
  29
  30config FEATURE_MOUNT_LOOP_CREATE
  31        bool "Create new loopback devices if needed"
  32        default y
  33        depends on FEATURE_MOUNT_LOOP
  34        help
  35        Linux kernels >= 2.6.24 support unlimited loopback devices. They are
  36        allocated for use when trying to use a loop device. The loop device
  37        must however exist.
  38
  39        This feature lets mount to try to create next /dev/loopN device
  40        if it does not find a free one.
  41
  42config FEATURE_MTAB_SUPPORT
  43        bool "Support old /etc/mtab file"
  44        default n
  45        depends on MOUNT || UMOUNT
  46        select FEATURE_MOUNT_FAKE
  47        help
  48        Historically, Unix systems kept track of the currently mounted
  49        partitions in the file "/etc/mtab". These days, the kernel exports
  50        the list of currently mounted partitions in "/proc/mounts", rendering
  51        the old mtab file obsolete. (In modern systems, /etc/mtab should be
  52        a symlink to /proc/mounts.)
  53
  54        The only reason to have mount maintain an /etc/mtab file itself is if
  55        your stripped-down embedded system does not have a /proc directory.
  56        If you must use this, keep in mind it's inherently brittle (for
  57        example a mount under chroot won't update it), can't handle modern
  58        features like separate per-process filesystem namespaces, requires
  59        that your /etc directory be writable, tends to get easily confused
  60        by --bind or --move mounts, won't update if you rename a directory
  61        that contains a mount point, and so on. (In brief: avoid.)
  62
  63        About the only reason to use this is if you've removed /proc from
  64        your kernel.
  65
  66source util-linux/volume_id/Config.in
  67
  68endmenu
  69