dracut/dracut-gencmdline

#!/bin/bash --norc
#
# Copyright 2005-2009 Red Hat, Inc.  All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# code taken from mkinitrd
#
#. /usr/libexec/initrd-functions

IF_verbose=""
function set_verbose() {
    case $1 in
        1|true|yes|on)
            IF_verbose="-v"
            ;;
        0|false|no|off)
            IF_verbose=""
            ;;
    esac
}

function is_verbose() {
    [ -n "$IF_verbose" ] && return 0
    return 1
}

function get_verbose() {
    echo "$IF_verbose"
    is_verbose
}


function get_numeric_dev() {
(
    fmt="%d:%d"
    if [ "$1" == "hex" ]; then
        fmt="%x:%x"
    fi
    ls -lH "$2" | awk '{ sub(/,/, "", $5); printf("'"$fmt"'", $5, $6); }'
) 2>/dev/null
}


function error() {
    echo "$@" >&2
}

function vecho() {
    is_verbose && echo "$@"
}

# module dep finding and installation functions
moduledep() {
    MPARGS=""
    if [ "$1" == "--ignore-install" ]; then
        MPARGS="$MPARGS --ignore-install"
        shift
    fi
    vecho -n "Looking for deps of module $1"
    deps=""
    deps=$(modprobe $MPARGS --set-version $kernel --show-depends $1 2>/dev/null| awk '/^insmod / { print gensub(".*/","","g",$2) }' | while read foo ; do [ "${foo%%.ko}" != "$1" ] && echo -n "${foo%%.ko} " ; done)
    [ -n "$deps" ] && vecho ": $deps" || vecho
}

export MALLOC_PERTURB_=204

PATH=/sbin:/usr/sbin:/bin:/usr/bin:$PATH
export PATH

# Set the umask. For iscsi, the initrd can contain plaintext
# password (chap secret), so only allow read by owner.
umask 077

VERSION=6.0.87

PROBE="yes"
MODULES=""
GRAPHICSMODS=""
PREMODS=""
DMRAIDS=""
ncryptodevs=0
ncryptoparts=0
ncryptolvs=0
ncryptoraids=0
root=""
scsi_wait_scan="no"

NET_LIST=""
LD_SO_CONF=/etc/ld.so.conf
LD_SO_CONF_D=/etc/ld.so.conf.d/

[ -e /etc/sysconfig/mkinitrd ] && . /etc/sysconfig/mkinitrd

CONFMODS="$MODULES"
MODULES=""
ARCH=$(uname -m | sed -e 's/s390x/s390/')

compress=1
allowmissing=""
target=""
kernel=""
force=""
img_vers=""
builtins=""
modulefile=/etc/modules.conf
[ "$ARCH" != "s390" ] && withusb=1
rc=0
nolvm=""
nodmraid=""

IMAGESIZE=8000
PRESCSIMODS=""
fstab="/etc/fstab"

vg_list=""
net_list="$NET_LIST"

usage () {
    if [ "$1" == "-n" ]; then
        cmd=echo
    else
        cmd=error
    fi

    $cmd "usage: `basename $0` [--version] [--help] [-v] [-f]"

    if [ "$1" == "-n" ]; then
        exit 0
    else
        exit 1
    fi
}


qpushd() {
    pushd "$1" >/dev/null 2>&1
}

qpopd() {
    popd >/dev/null 2>&1
}


freadlink() {
    readlink -f "$1"
}

resolve_device_name() {
    if [ -z "${1##UUID=*}" ]; then
        real=$(freadlink /dev/disk/by-uuid/${1##UUID=})
        [ -b $real ] && { echo $real; return; }
    fi
    if [ -z "${1##LABEL=*}" ]; then
        real=$(freadlink /dev/disk/by-label/${1##LABEL=})
        [ -b $real ] && { echo $real; return; }
    fi
    echo "$1" 
}

finddevnoinsys() {
    majmin="$1"
    if [ -n "$majmin" ]; then
        dev=$(for x in /sys/block/* ; do find $x/ -name dev ; done | while read device ; do \
              echo "$majmin" | cmp -s $device && echo $device ; done)
        if [ -n "$dev" ]; then
            dev=${dev%%/dev}
            dev=${dev%%/}
            echo "$dev"
            return 0
        fi
    fi
    return 1
}

finddevicedriverinsys () {
    if is_iscsi $PWD; then
        handleiscsi "$PWD"
        return
    fi
    while [ "$PWD" != "/sys/devices" ]; do
        deps=
        if [ -f modalias ]; then
            MODALIAS=$(cat modalias)
            if [ "${MODALIAS::7}" == "scsi:t-" ]; then
                scsi_wait_scan=yes
            fi
            moduledep $MODALIAS
            unset MODALIAS
        fi

        cd ..
    done
}

findstoragedriverinsys () {
    local sysfs=$(freadlink "$1")

    # if its a partition look at the device holding the partition
    if [ -f "$sysfs/start" ]; then
        sysfs=$(freadlink ${sysfs%/*})
    fi

    if [[ ! "$sysfs" =~ ^/sys/.*block/.*$ ]]; then
        #error "WARNING: $sysfs is a not a block sysfs path, skipping"
        return
    fi

    case " $handleddevices " in
        *" $sysfs "*)
            return ;;
        *) handleddevices="$handleddevices $sysfs" ;;
    esac

    if [[ "$sysfs" =~ ^/sys/.*block/md[0-9]+$ ]]; then
        local raid=${sysfs##*/}
        vecho "Found MDRAID component $raid"
        handleraid $raid
    fi
    if [[ "$sysfs" =~ ^/sys/.*block/dm-[0-9]+$ ]]; then
        vecho "Found DeviceMapper component ${sysfs##*/}"
        handledm $(cat $sysfs/dev |cut -d : -f 1) $(cat $sysfs/dev |cut -d : -f 2)
    fi

    for slave in $(ls -d "$sysfs"/slaves/* 2>/dev/null) ; do
        findstoragedriverinsys "$slave"
    done

    if [ -L "$sysfs/device" ]; then
        qpushd $(freadlink "$sysfs/device")
        finddevicedriverinsys
        qpopd
    fi
}

findstoragedriver () {
    local device="$1"

    if [ ! -b "$device" ]; then
        #error "WARNING: $device is a not a block device, skipping"
        return
    fi

    local majmin=$(get_numeric_dev dec "$device")
    local sysfs=$(finddevnoinsys "$majmin")

    if [ -z "$sysfs" ]; then
        #error "WARNING: $device major:minor $majmin not found, skipping"
        return
    fi

    vecho "Looking for driver for $device in $sysfs"
    findstoragedriverinsys "$sysfs"
}

iscsi_get_rec_val() {

    # The open-iscsi 742 release changed to using flat files in
    # /var/lib/iscsi.

    result=$(grep "^${2} = " "$1" |  sed -e s'/.* = //')
}

iscsi_set_parameters() {
    path=$1
    vecho setting iscsi parameters

    tmpfile=$(mktemp)

    # Check once before getting explicit values, so we can output a decent
    # error message.
    /sbin/iscsiadm --show -m session -r $path > $tmpfile
    if [ ! -s $tmpfile ]; then
        echo Unable to find iscsi record for $path
        exit 1
    fi

    nit_name=$(grep "^InitiatorName=" /etc/iscsi/initiatorname.iscsi | \
        sed -e "s/^InitiatorName=//")

    iscsi_get_rec_val $tmpfile "node.name"
    tgt_name=${result}
    iscsi_get_rec_val $tmpfile "node.tpgt"
    tpgt=${result}
    # iscsistart wants node.conn[0].address / port
    iscsi_get_rec_val $tmpfile 'node.conn\[0\].address'
    tgt_ipaddr=${result}
    iscsi_get_rec_val $tmpfile 'node.conn\[0\].port'
    tgt_port=${result}

    # Note: we get chap secrets (passwords) in plaintext, and also store
    # them in the initrd.

    iscsi_get_rec_val $tmpfile "node.session.auth.username"
    chap=${result}
    if [ -n "${chap}" -a "${chap}" != "<empty>" ]; then
        chap="-u ${chap}"
        iscsi_get_rec_val $tmpfile "node.session.auth.password" 
        chap_pw="-w ${result}"
    else
	chap=""
    fi

    iscsi_get_rec_val $tmpfile "node.session.auth.username_in"
    chap_in=${result}
    if [ -n "${chap_in}" -a "${chap_in}" != "<empty>" ]; then
        chap_in="-U ${chap_in}"
        iscsi_get_rec_val $tmpfile "node.session.auth.password_in" 
        chap_in_pw="-W ${result}"
    else
	chap_in=""
    fi

    rm $tmpfile
}

emit_iscsi () {
    if [ -n "${iscsi_devs}" ]; then
        for dev in ${iscsi_devs}; do
            iscsi_set_parameters $dev
            # recid is not really used, just use 0 for it
            echo "/bin/iscsistart -t ${tgt_name} -i ${nit_name} \
                -g ${tpgt} -a ${tgt_ipaddr} ${chap} ${chap_pw} \
                ${chap_in} ${chap_in_pw}"
        done
    fi
}

is_iscsi() {
    path=$1
    if echo $path | grep -q "/platform/host[0-9]*/session[0-9]*/target[0-9]*:[0-9]*:[0-9]*/[0-9]*:[0-9]*:[0-9]*:[0-9]*"; then
        return 0
    else 
        return 1
    fi
}

handledm() {
    major=$1
    minor=$2
    while read dmstart dmend dmtype r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 ; do
        case "$dmtype" in
            crypt)
                # this device is encrypted; find the slave device and see
                # whether the encryption is LUKS; if not, bail.
                slavedev=$(finddevnoinsys $r3)
                # get the basename, then s,!,/, in case it's a cciss device
                slavedev=$(echo ${slavedev##*/} | tr '!' '/')
                cryptsetup isLuks "/dev/$slavedev" 2>/dev/null || continue
                find_base_dm_mods
                dmname=$(dmsetup info -j $major -m $minor -c --noheadings -o name)
                # do the device resolution dance to get /dev/mapper/foo
                # since 'lvm lvs' doesn't like dm-X device nodes
                if [[ "$slavedev" =~ ^dm- ]]; then
                    majmin=$(get_numeric_dev dec "/dev/$slavedev")
                    for dmdev in /dev/mapper/* ; do
                        dmnum=$(get_numeric_dev dev $dmdev)
                        if [ $dmnum = $majmin ]; then
                            slavedev=${dmdev#/dev/}
                            break
                        fi
                    done
                fi

                # determine if $slavedev is an LV
                #  if so, add the device to latecryptodevs
                #  if not, add the device to cryptodevs
                local vg=$(lvshow /dev/$slavedev)
                if [ -n "$vg" ]; then
                    eval cryptolv${ncryptolvs}='"'/dev/$slavedev $dmname'"'
                    let ncryptolvs++
                elif grep -q "^$slavedev :" /proc/mdstat ; then
                    eval cryptoraid${ncryptoraids}='"'/dev/$slavedev $dmname'"'
                    let ncryptoraids++
                else
                    eval cryptoparts${ncryptoparts}='"'/dev/$slavedev $dmname'"'
                    let ncryptoparts++
                fi

                let ncryptodevs++
                findstoragedriver "/dev/$slavedev"
                ;;
        esac
    done << EOF
        $(dmsetup table -j $major -m $minor 2>/dev/null)
EOF
    local name=$(dmsetup info --noheadings -c -j $major -m $minor -o name)
    local vg=$(lvshow "/dev/mapper/$name")
    local raids=$(/sbin/dmraid -s -craidname 2>/dev/null | grep -vi "no raid disks") 
    if [ -n "$vg" ]; then
        vg=`echo $vg` # strip whitespace
        case " $vg_list " in
        *" $vg "*) ;;
        *)  vg_list="$vg_list $vg"
            [ -z "$nolvm" ] && find_base_dm_mods
            ;;
        esac
    fi
    for raid in $raids ; do
        if [ "$raid" == "$name" ]; then
            case " $DMRAIDS " in
                *" $raid "*) ;;
                *)  DMRAIDS="$DMRAIDS $raid"
                    [ -z "$nodmraid" ] && find_base_dm_mods
                    ;;
            esac
            break
        fi
    done
}

handleiscsi() {
    vecho "Found iscsi component $1"

    # We call iscsi_set_parameters once here to figure out what network to
    # use (it sets tgt_ipaddr), and once again to emit iscsi values,
    # not very efficient.
    iscsi_set_parameters $1
    iscsi_devs="$iscsi_devs $1"
    netdev=$(/sbin/ip route get to $tgt_ipaddr | \
        sed 's|.*dev \(.*\).*|\1|g' | awk '{ print $1; exit }')
    addnetdev $netdev
}

handleraid() {
    local start=0

    if [ -n "$noraid" -o ! -f /proc/mdstat ]; then
        return 0
    fi

    levels=$(awk "/^$1[	 ]*:/ { print\$4 }" /proc/mdstat)

    for level in $levels ; do
        case $level in
        linear)
            start=1
            ;;
        multipath)
            start=1
            ;;
        raid[01] | raid10)
            start=1
            ;;
        raid[456])
            start=1
            ;;
        *)
            error "raid level $level (in /proc/mdstat) not recognized"
            ;;
        esac
    done
    if [ "$start" = 1 ]; then
        raiddevices="$raiddevices $1"
    fi
    return $start
}

lvshow() {
    lvm lvs --ignorelockingfailure --noheadings -o vg_name \
        $1 2>/dev/null | egrep -v '^ *(WARNING:|Volume Groups with)'
}

vgdisplay() {
    lvm vgdisplay --ignorelockingfailure -v $1 2>/dev/null |
        sed -n 's/PV Name//p'
}

dmmods_found="n"
find_base_dm_mods()
{
    [ "$dmmods_found" == "n" ] || return
    dmmods_found="y"
}

savedargs=$*
while [ $# -gt 0 ]; do
    case $1 in
        --fstab*)
            if [ "$1" != "${1##--fstab=}" ]; then
                fstab=${1##--fstab=}
            else
                fstab=$2
                shift
            fi
            ;;


        -v|--verbose)
            set_verbose true
            ;;
        --net-dev*)
            if [ "$1" != "${1##--net-dev=}" ]; then
                net_list="$net_list ${1##--net-dev=}"
            else
                net_list="$net_list $2"
                shift
            fi
            ;;
	--rootdev*)
            if [ "$1" != "${1##--rootdev=}" ]; then
                rootdev="${1##--rootdev=}"
            else
                rootdev="$2"
                shift
            fi
	    ;;
	--thawdev*)
            if [ "$1" != "${1##--thawdev=}" ]; then
                thawdev="${1##--thawdev=}"
            else
                thawdev="$2"
                shift
            fi
	    ;;
	--rootfs*)
            if [ "$1" != "${1##--rootfs=}" ]; then
                rootfs="${1##--rootfs=}"
            else
                rootfs="$2"
                shift
            fi
	    ;;
	--rootopts*)
            if [ "$1" != "${1##--rootopts=}" ]; then
                rootopts="${1##--rootopts=}"
            else
                rootopts="$2"
                shift
            fi
	    ;;
	--root*)
            if [ "$1" != "${1##--root=}" ]; then
                root="${1##--root=}"
            else
                root="$2"
                shift
            fi
	    ;;
	--loopdev*)
            if [ "$1" != "${1##--loopdev=}" ]; then
                loopdev="${1##--loopdev=}"
            else
                loopdev="$2"
                shift
            fi
	    ;;
	--loopfs*)
            if [ "$1" != "${1##--loopfs=}" ]; then
                loopfs="${1##--loopfs=}"
            else
                loopfs="$2"
                shift
            fi
	    ;;
	--loopopts*)
            if [ "$1" != "${1##--loopopts=}" ]; then
                loopopts="${1##--loopopts=}"
            else
                loopopts="$2"
                shift
            fi
	    ;;
	--looppath*)
            if [ "$1" != "${1##--looppath=}" ]; then
                looppath="${1##--looppath=}"
            else
                looppath="$2"
                shift
            fi
	    ;;
        --help)
            usage -n
            ;;
        *)
            if [ -z "$target" ]; then
                target=$1
            elif [ -z "$kernel" ]; then
                kernel=$1
            else
                usage
            fi
            ;;
    esac

    shift
done

    [ -z "$rootfs" ] && rootfs=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $3; }}' $fstab)
    [ -z "$rootopts" ] && rootopts=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $4; }}' $fstab)
    [ -z "$rootopts" ] && rootopts="defaults"


    [ -z "$rootdev" ] && rootdev=$(awk '/^[ \t]*[^#]/ { if ($2 == "/") { print $1; }}' $fstab)
    # check if it's nfsroot
    physdev=""
    if [ "$rootfs" == "nfs" ]; then
        if [ "x$net_list" == "x" ]; then
            handlenfs $rootdev
        fi
    else
        # check if it's root by label
        rdev=$rootdev
        rdev=$(resolve_device_name "$rdev")
        rootopts=$(echo $rootopts | sed -e 's/^r[ow],//' -e 's/,_netdev//' -e 's/_netdev//' -e 's/,r[ow],$//' -e 's/,r[ow],/,/' -e 's/^r[ow]$/defaults/' -e 's/$/,ro/')
        findstoragedriver "$rdev"
    fi

    # find the first swap dev which would get used for swsusp
    [ -z "$thawdev" ] && thawdev=$(awk '/^[ \t]*[^#]/ { if ($3 == "swap") { print $1; exit }}' $fstab)
    swsuspdev="$thawdev"
    if [ -n "$swsuspdev" ]; then
        swsuspdev=$(resolve_device_name "$swsuspdev")
	findstoragedriver "$swsuspdev"
    fi


cemit()
{
    cat 
}

emit()
{
    NONL=""
    if [ "$1" == "-n" ]; then
        NONL="-n"
        shift
    fi
    echo $NONL "$@" 
}

emitdmraids()
{
    if [ -z "$nodmraid" -a -n "$DMRAIDS" ]; then
        for raid in $DMRAIDS; do
            echo -n "rd_DM_UUID=$raid "
        done
    fi
}


# HACK: module loading + device creation isn't necessarily synchronous...
# this will make sure that we have all of our devices before trying
# things like RAID or LVM
emitdmraids

emitcrypto()
{
    local luksuuid=$(grep "^$2 " /etc/crypttab 2>/dev/null| awk '{ print $2 }')
    if [ -z "$luksuuid" ]; then
        luksuuid="$2"
    fi
    luksuuid=${luksuuid##UUID=}
    echo -n "rd_LUKS_UUID=$luksuuid "
}

if [ -n "$raiddevices" ]; then
    for dev in $raiddevices; do
        uid=$(udevadm info --query=env --name /dev/${dev}|grep MD_UUID)
        uid=${uid##MD_UUID=}
        [ -n "$uid" ] && echo -n "rd_MD_UUID=$uid "
    done
else
    echo -n "rd_NO_MD "
fi

if [ -z "$nolvm" -a -n "$vg_list" ]; then    
    for vg in $vg_list; do 
	echo -n "rd_LVM_VG=$vg "
    done
else
    echo -n "rd_NO_LVM "
fi

cryptdevs="$(echo ${!cryptoraid@} ${!cryptopart@} ${!cryptolv@})"

if [ -z "$cryptdevs" ]; then
    echo -n "rd_NO_LUKS "
else
    for cryptdev in ${!cryptoraid@} ${!cryptopart@} ${!cryptolv@} ; do
        emitcrypto `eval echo '$'$cryptdev`
    done
fi

# output local keyboard/18n settings
[ -e /etc/sysconfig/keyboard ] && . /etc/sysconfig/keyboard
[ -e /etc/sysconfig/i18n ] && . /etc/sysconfig/i18n

for i in KEYTABLE SYSFONT SYSFONTACM UNIMAP LANG; do
    val=$(eval echo \$$i)
    [[ $val ]] && echo -n "$i=$val "
done

if [ -n "$KEYBOARDTYPE" -a "$KEYBOARDTYPE" != "pc" ]; then
    echo -n "KEYBOARDTYPE=$KEYBOARDTYPE "
fi

if [ -n "$rootdev" ]; then
    echo -n "root=$rootdev "
fi

echo
# vim:ts=8:sw=4:sts=4:et