src/initscripts/init.d/udev

   1 #!/bin/sh
   2 ########################################################################
   3 # Begin $rc_base/init.d/udev
   4 #
   5 # Description : Udev cold-plugging script
   6 #
   7 # Authors     : Zack Winkles, Alexander E. Patrakov
   8 #
   9 # Version     : 00.02
  10 #
  11 # Notes       :
  12 #
  13 ########################################################################
  14
  15 . /etc/sysconfig/rc
  16 . ${rc_functions}
  17
  18 case "${1}" in
  19         start)
  20                 boot_mesg "Mount /var/run..."
  21                 mount -n -t tmpfs tmpfs /var/run -o size=2M
  22
  23                 boot_mesg "Populating /dev with device nodes..."
  24                 if ! grep -q '[[:space:]]sysfs' /proc/mounts; then
  25                         echo_failure
  26                         boot_mesg -n "FAILURE:\n\nUnable to create" ${FAILURE}
  27                         boot_mesg -n " devices without a SysFS filesystem"
  28                         boot_mesg -n "\n\nAfter you press Enter, this system"
  29                         boot_mesg -n " will be halted and powered off."
  30                         boot_mesg -n "\n\nPress Enter to continue..." ${INFO}
  31                         boot_mesg "" ${NORMAL}
  32                         read ENTER
  33                         /etc/rc.d/init.d/halt stop
  34                 fi
  35                 if ! grep -q '[[:space:]]/dev' /proc/mounts; then
  36                         echo_failure
  37                         boot_mesg -n "FAILURE:\n\nKernel has no devtmpfs/mount" ${FAILURE}
  38                         boot_mesg -n " support but this is needed for udev."
  39                         boot_mesg -n "\n\nAfter you press Enter, this system"
  40                         boot_mesg -n " will be halted and powered off."
  41                         boot_mesg -n "\n\nPress Enter to continue..." ${INFO}
  42                         boot_mesg "" ${NORMAL}
  43                         read ENTER
  44                         /etc/rc.d/init.d/halt stop
  45                 fi
  46
  47                 # Udev handles uevents itself, so we don't need to have
  48                 # the kernel call out to any binary in response to them
  49                 echo > /proc/sys/kernel/hotplug
  50
  51                 # Copy static device nodes to /dev
  52                 cp -a /lib/udev/devices/* /dev
  53
  54                 # Start the udev daemon to continually watch for, and act on,
  55                 # uevents
  56                 /sbin/udevd --daemon
  57
  58                 # Now traverse /sys in order to "coldplug" devices that have
  59                 # already been discovered
  60                 /bin/udevadm trigger
  61
  62                 # Now wait for udevd to process the uevents we triggered
  63                 /bin/udevadm settle
  64                 evaluate_retval
  65
  66                 ;;
  67
  68         *)
  69                 echo "Usage ${0} {start}"
  70                 exit 1
  71                 ;;
  72 esac
  73
  74 # End $rc_base/init.d/udev