Chip 2007 January, February, March & April/Chip-Cover-CD-2007-02.iso/Pakiet bezpieczenstwa/mini Pentoo LiveCD 2006.1/mpentoo-2006.1.iso/livecd.squashfs/lib/rcscripts/addons/udev-start.sh

Text File | 2006-05-02 | 4KB | 177 lines

# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

udev_version() {
    local version=0

    if [[ -x /sbin/udev ]] ; then
        version=$(/sbin/udev -V)
        # We need it without a leading '0', else bash do the wrong thing
        version=${version##0}
        # Older udev's will print nothing
        [[ -z ${version} ]] && version=0
    fi

    echo "${version}"
}

# This works for 2.6.15 kernels or greater
trigger_events() {
    list=""
    # if you want real coldplug (with all modules being loaded for all
    # devices in the system), uncomment out the next line.
    #list="$list $(echo /sys/bus/*/devices/*/uevent)"
    list="$list $(echo /sys/class/*/*/uevent)"
    list="$list $(echo /sys/block/*/uevent /sys/block/*/*/uevent)"
    for i in $list; do
        case "$i" in
            */device/uevent)
                # skip followed device symlinks
                continue
                ;;
            */class/mem/*|*/class/tty/*)
                first="$first $i"
                ;;
            */block/md*)
                last="$last $i"
                ;;
            */*)
                default="$default $i"
                ;;
        esac
    done

    # trigger the sorted events
    for i in $first $default $last; do
        echo "add" > "$i"
    done
}

populate_udev() {
    # populate /dev with devices already found by the kernel
    if [ "$(get_KV)" -gt "$(KV_to_int '2.6.14')" ] ; then
        ebegin "Populating /dev with existing devices through uevents"
        trigger_events
        eend 0
    else
        ebegin "Populating /dev with existing devices with udevstart"
        /sbin/udevstart
        eend 0
    fi

    # loop until everything is finished
    # there's gotta be a better way...
    ebegin "Letting udev process events"
    loop=0
    while test -d /dev/.udev/queue; do
        sleep 0.1;
        test "$loop" -gt 300 && break
        loop=$(($loop + 1))
    done
    #einfo "loop = $loop"
    eend 0

    return 0
}

seed_dev() {
    # Seed /dev with some things that we know we need
    ebegin "Seeding /dev with needed nodes"

    # copy over any persistant things
    cp --preserve=all --recursive --update /lib/udev/devices/* /dev

    # Not provided by sysfs but needed
    ln -snf /proc/self/fd /dev/fd
    ln -snf fd/0 /dev/stdin
    ln -snf fd/1 /dev/stdout
    ln -snf fd/2 /dev/stderr
    [[ -e /proc/kcore ]] && ln -snf /proc/kcore /dev/core

    # Create problematic directories
    mkdir -p /dev/{pts,shm}
    eend 0
}


main() {
    # Setup temporary storage for /dev
    ebegin "Mounting /dev for udev"
    if [[ ${RC_USE_FSTAB} == "yes" ]] ; then
        mntcmd=$(get_mount_fstab /dev)
    else
        unset mntcmd
    fi
    if [[ -n ${mntcmd} ]] ; then
        try mount -n ${mntcmd}
    else
        if egrep -qs tmpfs /proc/filesystems ; then
            mntcmd="tmpfs"
        else
            mntcmd="ramfs"
        fi
        # many video drivers require exec access in /dev #92921
        try mount -n -t ${mntcmd} udev /dev -o exec,nosuid,mode=0755
    fi
    eend $?

    # Create a file so that our rc system knows it's still in sysinit.
    # Existance means init scripts will not directly run.
    # rc will remove the file when done with sysinit.
    touch /dev/.rcsysinit

    # Selinux lovin; /selinux should be mounted by selinux-patched init
    if [[ -x /sbin/restorecon && -c /selinux/null ]] ; then
        restorecon /dev &> /selinux/null
    fi

    # Actually get udev rolling
    if [[ ${RC_DEVICE_TARBALL} == "yes" && \
          -s /lib/udev-state/devices.tar.bz2 ]] ; then
        ebegin "Populating /dev with saved device nodes"
        try tar -jxpf /lib/udev-state/devices.tar.bz2 -C /dev
        eend $?
    fi

    seed_dev

    # Setup hotplugging (if possible)
    ebegin "Setting up proper hotplug agent"
    if [[ -e /proc/sys/kernel/hotplug ]] ; then
        if [ "$(get_KV)" -gt "$(KV_to_int '2.6.14')" ] ; then
            einfo "  Using netlink for hotplug events..."
            echo "" > /proc/sys/kernel/hotplug
        elif [[ $(udev_version) -ge "48" ]] ; then
            einfo "  Setting /sbin/udevsend as hotplug agent ..."
            echo "/sbin/udevsend" > /proc/sys/kernel/hotplug
        elif [[ -x /sbin/hotplug ]] ; then
            einfo "  Using /sbin/hotplug as hotplug agent ..."
        else
            einfo "  Setting /sbin/udev as hotplug agent ..."
            echo "/sbin/udev" > /proc/sys/kernel/hotplug
        fi
    fi
    eend 0

    ebegin "Starting udevd"
    /sbin/udevd --daemon
    eend $?

    populate_udev

    # Create nodes that udev can't
    ebegin "Finializing udev configuration"
    [[ -x /sbin/dmsetup ]] && /sbin/dmsetup mknodes &>/dev/null
    [[ -x /sbin/lvm ]] && \
        /sbin/lvm vgscan -P --mknodes --ignorelockingfailure &>/dev/null
    # Running evms_activate on a LiveCD causes lots of headaches
    [[ -z ${CDBOOT} ]] && [[ -x /sbin/evms_activate ]] && \
        /sbin/evms_activate -q &>/dev/null
    eend 0
}

main


# vim:ts=4