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 "Populating /dev with device nodes..."
  21                 if ! grep -q '[[:space:]]sysfs' /proc/mounts; then
  22                         echo_failure
  23                         boot_mesg -n "FAILURE:\n\nUnable to create" ${FAILURE}
  24                         boot_mesg -n " devices without a SysFS filesystem"
  25                         boot_mesg -n "\n\nAfter you press Enter, this system"
  26                         boot_mesg -n " will be halted and powered off."
  27                         boot_mesg -n "\n\nPress Enter to continue..." ${INFO}
  28                         boot_mesg "" ${NORMAL}
  29                         read ENTER
  30                         /etc/rc.d/init.d/halt stop
  31                 fi
  32
  33                 # Mount a temporary file system over /dev, so that any devices
  34                 # made or removed during this boot don't affect the next one.
  35                 # The reason we don't write to mtab is because we don't ever
  36                 # want /dev to be unavailable (such as by `umount -a').
  37                 mount -n -t tmpfs tmpfs /dev -o mode=755
  38                 if [ ${?} != 0 ]; then
  39                         echo_failure
  40                         boot_mesg -n "FAILURE:\n\nCannot mount a tmpfs" ${FAILURE}
  41                         boot_mesg -n " onto /dev, this system will be halted."
  42                         boot_mesg -n "\n\nAfter you press Enter, this system"
  43                         boot_mesg -n " will be halted and powered off."
  44                         boot_mesg -n "\n\nPress Enter to continue..." ${INFO}
  45                         boot_mesg "" ${NORMAL}
  46                         read ENTER
  47                         /etc/rc.d/init.d/halt stop
  48                 fi
  49
  50                 # Udev handles uevents itself, so we don't need to have
  51                 # the kernel call out to any binary in response to them
  52                 echo > /proc/sys/kernel/hotplug
  53
  54                 # Copy static device nodes to /dev
  55                 cp -a /lib/udev/devices/* /dev
  56
  57                 # Start the udev daemon to continually watch for, and act on,
  58                 # uevents
  59                 /sbin/udevd --daemon
  60
  61                 # Now traverse /sys in order to "coldplug" devices that have
  62                 # already been discovered
  63                 /sbin/udevtrigger
  64
  65                 # Now wait for udevd to process the uevents we triggered
  66                 /sbin/udevsettle
  67                 evaluate_retval
  68
  69                 ;;
  70
  71         *)
  72                 echo "Usage ${0} {start}"
  73                 exit 1
  74                 ;;
  75 esac
  76
  77 # End $rc_base/init.d/udev