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#!/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').
                if ! mountpoint /dev > /dev/null; then
                        mount -n -t tmpfs tmpfs /dev -o mode=755
                fi
                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 the only static device node that Udev >= 155 doesn't
                # handle to /dev
                cp -a /lib/udev/devices/null /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 --action=add

                # 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