D.6. /etc/rc.d/init.d/udev


#!/bin/sh

########################################################################

# Begin $rc_base/init.d/udev

#

# Description : Udev cold-plugging script

#

# Authors     : Zack Winkles, Alexander E. Patrakov

#

# Version     : 00.02

#

# Notes       :

#

########################################################################



. /etc/sysconfig/rc

. ${rc_functions}



case "${1}" in

    start)

        boot_mesg "Populating /dev with device nodes..."

        if ! grep -q '[[:space:]]sysfs' /proc/mounts; then

            echo_failure

            boot_mesg -n "FAILURE:\n\nUnable to create" ${FAILURE}

            boot_mesg -n " devices without a SysFS filesystem"

            boot_mesg -n "\n\nAfter you press Enter, this system"

            boot_mesg -n " will be halted and powered off."

            boot_mesg -n "\n\nPress Enter to continue..." ${INFO}

            boot_mesg "" ${NORMAL}

            read ENTER

            /etc/rc.d/init.d/halt stop

        fi



        # Mount a temporary file system over /dev, so that any devices

        # made or removed during this boot don't affect the next one.

        # The reason we don't write to mtab is because we don't ever

        # want /dev to be unavailable (such as by `umount -a').

        mount -n -t tmpfs tmpfs /dev -o mode=755

        if [ ${?} != 0 ]; then

            echo_failure

            boot_mesg -n "FAILURE:\n\nCannot mount a tmpfs" ${FAILURE}

            boot_mesg -n " onto /dev, this system will be halted."

            boot_mesg -n "\n\nAfter you press Enter, this system"

            boot_mesg -n " will be halted and powered off."

            boot_mesg -n "\n\nPress Enter to continue..." ${INFO}

            boot_mesg "" ${NORMAL}

            read ENTER

            /etc/rc.d/init.d/halt stop

        fi



        # Udev handles uevents itself, so we don't need to have

        # the kernel call out to any binary in response to them

        echo > /proc/sys/kernel/hotplug



        # Copy static device nodes to /dev

        cp -a /lib/udev/devices/* /dev



        # Start the udev daemon to continually watch for, and act on,

        # uevents

        /sbin/udevd --daemon



        # Now traverse /sys in order to "coldplug" devices that have

        # already been discovered

        /sbin/udevadm trigger



        # Now wait for udevd to process the uevents we triggered

        /sbin/udevadm settle

        evaluate_retval



        ;;



    *)

        echo "Usage ${0} {start}"

        exit 1

        ;;

esac



# End $rc_base/init.d/udev


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