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# -*- shell-script -*-

_log_msg()
{
	if [ "$quiet" = "y" ]; then return; fi
	printf "$@"
}

log_success_msg()
{
	_log_msg "Success: $@\n"
}

log_failure_msg()
{
	_log_msg "Failure: $@\n"
}

log_warning_msg()
{
	_log_msg "Warning: $@\n"
}

log_begin_msg()
{
	_log_msg "Begin: $@ ... "
}

log_end_msg()
{
	_log_msg "done.\n"
}

panic()
{
	if command -v chvt >/dev/null 2>&1; then
		chvt 1
	fi

echo "$@"
	# Disallow console access
	if [ -n "${panic}" ]; then
		echo "Rebooting automatically due to panic= boot argument"
		sleep ${panic}
		reboot
		exit  # in case reboot fails, force kernel panic
	fi
	modprobe -v i8042 || true
	modprobe -v atkbd || true
	modprobe -v ehci-pci || true
	modprobe -v ehci-orion || true
	modprobe -v ehci-hcd || true
	modprobe -v uhci-hcd || true
	modprobe -v ohci-hcd || true
	modprobe -v usbhid || true

run_scripts /scripts/panic

REASON="$@" PS1='(initramfs) ' /bin/sh -i </dev/console >/dev/console 2>&1
}

maybe_break()
{
	if [ "${break:-}" = "$1" ]; then
		panic "Spawning shell within the initramfs"
	fi
}

render()
{
	eval "echo -n \${$@}"
}

# For boot time only; this is overridden at build time in hook-functions
run_scripts()
{
	initdir=${1}
	[ ! -d ${initdir} ] && return

shift
	. ${initdir}/ORDER
}

# Load custom modules first
load_modules()
{
	if [ -e /conf/modules ]; then
		cat /conf/modules | while read m; do
			# Skip empty lines
			if [ -z "$m" ];  then
				continue
			fi
			# Skip comments - d?ash removes whitespace prefix
			com=$(printf "%.1s" "${m}")
			if [ "$com" = "#" ]; then
				continue
			fi
			modprobe $m
		done
	fi
}

# lilo compatibility
parse_numeric() {
	case $1 in
	"")
		return
		;;
	/*)
		return
		;;
	[0-9]*:[0-9]*)
		minor=$(( ${1#*:} ))
		major=$(( ${1%:*} ))
		;;
	[A-Fa-f0-9]*)
		value=$(( 0x${1} ))
		minor=$(( ${value} % 256 ))
		major=$(( ${value} / 256 ))
		;;
	*)
		return
		;;
	esac

if command -v udevd >/dev/null 2>&1; then
		ROOT=/dev/block/${major}:${minor}
	else
		mknod -m 600 /dev/root b ${major} ${minor}
		ROOT=/dev/root
	fi
}

# Parameter: device node to check
# Echos fstype to stdout
# Return value: indicates if an fs could be recognized
get_fstype ()
{
	local FS FSTYPE FSSIZE RET
	FS="${1}"

# blkid has a more complete list of file systems,
	# but fstype is more robust
	FSTYPE="unknown"
	eval $(fstype "${FS}" 2> /dev/null)
	if [ "$FSTYPE" = "unknown" ] &&  command -v blkid >/dev/null 2>&1 ; then
		FSTYPE=$(blkid -o value -s TYPE "${FS}")
	elif [ "$FSTYPE" = "unknown" ] && [ -x /lib/udev/vol_id ]; then
		FSTYPE=$(/lib/udev/vol_id -t "${FS}" 2> /dev/null)
	fi
	RET=$?

if [ -z "${FSTYPE}" ]; then
		FSTYPE="unknown"
	fi

echo "${FSTYPE}"
	return ${RET}
}

configure_networking()
{
	if [ -n "${BOOTIF}" ]; then
		# pxelinux sets BOOTIF to a value based on the mac address of the
		# network card used to PXE boot, so use this value for DEVICE rather
		# than a hard-coded device name from initramfs.conf. this facilitates
		# network booting when machines may have multiple network cards.
		# pxelinux sets BOOTIF to 01-$mac_address

# strip off the leading "01-", which isn't part of the mac
		# address
		temp_mac=${BOOTIF#*-}

# convert to typical mac address format by replacing "-" with ":"
		bootif_mac=""
		IFS='-'
		for x in $temp_mac ; do
			if [ -z "$bootif_mac" ]; then
				bootif_mac="$x"
			else
				bootif_mac="$bootif_mac:$x"
			fi
		done
		unset IFS

# look for devices with matching mac address, and set DEVICE to
		# appropriate value if match is found.
		for device in /sys/class/net/* ; do
			if [ -f "$device/address" ]; then
				current_mac=$(cat "$device/address")
				if [ "$bootif_mac" = "$current_mac" ]; then
					DEVICE=${device##*/}
					break
				fi
			fi
		done
	fi

# networking already configured thus bail out
	[ -n "${DEVICE}" ] && [ -e /run/net-"${DEVICE}".conf ] && return 0

wait_for_udev 10

# support ip options see linux sources
	# Documentation/filesystems/nfs/nfsroot.txt
	# Documentation/frv/booting.txt

for ROUNDTTT in 2 3 4 6 9 16 25 36 64 100; do

# The NIC is to be configured if this file does not exist.
		# Ip-Config tries to create this file and when it succeds
		# creating the file, ipconfig is not run again.
		for x in /run/net-"${DEVICE}".conf /run/net-*.conf ; do
			[ -e "$x" ] && break 2
		done

case ${IP} in
		none|off)
			# Do nothing
			;;
		""|on|any)
			# Bring up device
			ipconfig -t ${ROUNDTTT} "${DEVICE}"
			;;
		dhcp|bootp|rarp|both)
			ipconfig -t ${ROUNDTTT} -c ${IP} -d "${DEVICE}"
			;;
		*)
			ipconfig -t ${ROUNDTTT} -d $IP

# grab device entry from ip option
			NEW_DEVICE=${IP#*:*:*:*:*:*}
			if [ "${NEW_DEVICE}" != "${IP}" ]; then
				NEW_DEVICE=${NEW_DEVICE%%:*}
			else
				# wrong parse, possibly only a partial string
				NEW_DEVICE=
			fi
			if [ -n "${NEW_DEVICE}" ]; then
				DEVICE="${NEW_DEVICE}"
			fi
			;;
		esac
	done

# source ipconfig output
	if [ -n "${DEVICE}" ]; then
		# source specific bootdevice
		. /run/net-${DEVICE}.conf
	else
		# source any interface...
		# ipconfig should have quit after first response
		. /run/net-*.conf
	fi
}

# Wait for queued kernel/udev events
wait_for_udev()
{
	command -v udevadm >/dev/null 2>&1 || return 0
	udevadm settle ${1:+--timeout=$1}
}

# Find a specific fstab entry
# $1=mountpoint
# $2=fstype (optional)
# returns 0 on success, 1 on failure (not found or no fstab)
read_fstab_entry() {
	# Not found by default.
	found=1

for file in ${rootmnt}/etc/fstab; do
		if [ -f "$file" ]; then
			while read MNT_FSNAME MNT_DIR MNT_TYPE MNT_OPTS MNT_FREQ MNT_PASS MNT_JUNK; do
				case "$MNT_FSNAME" in
				  ""|\#*)
					continue;
					;;
				esac
				if [ "$MNT_DIR" = "$1" ]; then
					if [ -n "$2" ]; then
						[ "$MNT_TYPE" = "$2" ] || continue;
					fi
					found=0
					break 2
				fi
			done < "$file"
		fi
	done

return $found
}

# Resolve device node from a name.  This expands any LABEL or UUID.
# $1=name
# Resolved name is echoed.
resolve_device() {
	DEV="$1"

case $DEV in
	LABEL=*)
		DEV="${DEV#LABEL=}"

# support any / in LABEL= path (escape to \x2f)
		case "${DEV}" in
		*/*)
		if command -v sed >/dev/null 2>&1; then
			DEV="$(echo ${DEV} | sed 's,/,\\x2f,g')"
		else
			if [ "${DEV}" != "${DEV#/}" ]; then
				DEV="\x2f${DEV#/}"
			fi
			if [ "${DEV}" != "${DEV%/}" ]; then
				DEV="${DEV%/}\x2f"
			fi
			IFS='/'
			newroot=
			for s in $DEV; do
				newroot="${newroot:+${newroot}\\x2f}${s}"
			done
			unset IFS
			DEV="${newroot}"
		fi
		esac
		DEV="/dev/disk/by-label/${DEV}"
		;;
	UUID=*)
		DEV="/dev/disk/by-uuid/${DEV#UUID=}"
		;;
	esac
	# Only canonicalise if a valid file, in case $DEV isn't a filename
	[ -e "$DEV" ] && DEV=$(readlink -f "$DEV")
	echo "$DEV"
}

# Check a file system.
# $1=device
# $2=mountpoint (for diagnostics only)
_checkfs_once()
{
	DEV="$1"
	NAME="$2"
	if [ "$NAME" = "/" ] ; then
		NAME="root"
	fi
	FSCK_LOGFILE=/run/initramfs/fsck.log
	FSCK_STAMPFILE=/run/initramfs/fsck-${NAME#/}

TYPE=$(get_fstype "$1")

FSCKCODE=0
	if [ "$fastboot" = "y" ] ; then
		log_warning_msg "Fast boot enabled, so skipping $NAME file system check."
		return
	fi

if [ "$forcefsck" = "y" ]
	then
		force="-f"
	else
		force=""
	fi

if [ "$fsckfix" = "y" ]
	then
		fix="-y"
	elif [ "$fsckfix" = "n" ]
	then
		fix="-n"
	else
		fix="-a"
	fi

spinner=""
	if [ -z "${debug}" ]; then
		spinner="-C"
	fi

if [ "${quiet}" = n ]
	then
		log_begin_msg "Will now check $NAME file system"
		logsave -a -s $FSCK_LOGFILE fsck $spinner $force $fix -V -t $TYPE $DEV
		FSCKCODE=$?
		log_end_msg
	else
		log_begin_msg "Checking $NAME file system"
		logsave -a -s $FSCK_LOGFILE fsck $spinner $force $fix -T -t $TYPE $DEV
		FSCKCODE=$?
		log_end_msg
	fi

# NOTE: "failure" is defined as exiting with a return code of
	# 4, possibly or-ed with other flags. A return code of 1
	# indicates that file system errors were corrected but that
	# the boot may proceed.
	#
	if [ "$FSCKCODE" -eq 32 ]
	then
		log_warning_msg "File system check was interrupted by user"
	elif [ $((FSCKCODE & 4)) -eq 4 ]
	then
		log_failure_msg "File system check of the $NAME filesystem failed"
		return 1
	elif [ "$FSCKCODE" -gt 1 ]
	then
		log_warning_msg "File system check failed but did not detect errors"
		sleep 5
	else
		> $FSCK_STAMPFILE
	fi
	return 0
}

checkfs()
{
	while ! _checkfs_once "$@"; do
		panic "The $2 filesystem on $1 requires a manual fsck"
	done
}

# Mount a file system.  We parse the information from the fstab.  This
# should be overridden by any boot script which can mount arbitrary
# filesystems such as /usr.  This default implementation delegates to
# local or nfs based upon the filesystem type.
# $1=mountpoint mount location
mountfs()
{
	type=local
	read_fstab_entry "$1"
	if [ "${MNT_TYPE}" = "nfs" ] || [ "${MNT_TYPE}" = "nfs4" ]; then
		type=nfs
	fi

${type}_mount_fs "$1"
}

# Mount the root file system.  It should be overridden by all
# boot scripts.
mountroot()
{
	:
}

# Run /scripts/${boot}-top.  This should be overridden by all boot
# scripts.
mount_top()
{
	:
}

# Run /scripts/${boot}-premount.  This should be overridden by all boot
# scripts.
mount_premount()
{
	:
}

# Run /scripts/${boot}-bottom.  This should be overridden by all boot
# scripts.
mount_bottom()
{
	:
}