bootscripts/contrib/init.d/udev

   1 #!/bin/sh
   2 # Begin $rc_base/init.d/udev - Udev cold-plugging script
   3
   4 # Written by Zack Winkles  - winkie@linuxfromscratch.org
   5
   6 . /etc/sysconfig/rc
   7 . $rc_functions
   8
   9 # Assure that sysfs is mounted and that udev is present.
  10 [ -d /sys/block -a -x /sbin/udev ] || exit 0
  11
  12 # Create some things that sysfs does not, and should not export for us.  Feel
  13 # free to add devices to this list.
  14 make_extra_nodes() {
  15         ln -s /proc/self/fd /dev/fd
  16         ln -s /proc/self/fd/0 /dev/stdin
  17         ln -s /proc/self/fd/1 /dev/stdout
  18         ln -s /proc/self/fd/2 /dev/stderr
  19         ln -s /proc/kcore /dev/core
  20         mkdir /dev/pts
  21         mkdir /dev/shm
  22 }
  23
  24 case "$1" in
  25         start)
  26                 # When the hotplug package isn't installed, make sure that udev
  27                 # still gets hotplug events.
  28                 if [ ! -x /sbin/hotplug ]; then
  29                         echo /sbin/udev > /proc/sys/kernel/hotplug
  30                 fi
  31
  32                 echo "Populating /dev with device nodes..."
  33
  34                 # Mount a temporary file system over /dev, so that any devices
  35                 # made or removed during this boot don't affect the next one.
  36                 # The reason we don't write to mtab is because we don't ever
  37                 # want /dev to be unavailable (such as by `umount -a').
  38                 mount -n -t ramfs ramfs /dev
  39
  40                 # Populate /dev with all the devices that are already available,
  41                 # and save it's status so we can report failures.
  42                 udevstart || failed=1
  43
  44                 # Now, create some required files/directories/devices that sysfs
  45                 # doesn't export for us.
  46                 make_extra_nodes
  47
  48                 # When reporting the status, base it on the success or failure
  49                 # of the `udevstart' command, since that's the most important.
  50                 (exit $failed)
  51                 evaluate_retval
  52                 ;;
  53         *)
  54                 echo "Usage $0 {start}"
  55                 exit 1
  56                 ;;
  57 esac
  58
  59 # End $rc_base/init.d/udev