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     #!/bin/bash
#
# Set up readonly-root support.
#

. /etc/init.d/functions

# We need to initialize the $HOSTNAME variable by ourselves now:
# (It was previously done for RHEL-6 branch, but got lost in time.)
HOSTNAME="$(hostname)"

# Check SELinux status
SELINUX_STATE=
if [ -e "/sys/fs/selinux/enforce" ] && [ "$(cat /proc/self/attr/current)" != "kernel" ]; then
	if [ -r "/sys/fs/selinux/enforce" ] ; then
		SELINUX_STATE=$(cat "/sys/fs/selinux/enforce")
	else
		# assume enforcing if you can't read it
		SELINUX_STATE=1
	fi
fi

selinux_fixup() {
	if [ -n "$SELINUX_STATE" ] && [ -e "$1" ]; then
		restorecon -R "$1"
	fi
}

# Only read this once.
[ -z "${cmdline}" ] && cmdline=$(cat /proc/cmdline)

READONLY=
if [ -f /etc/sysconfig/readonly-root ]; then
	. /etc/sysconfig/readonly-root
fi
if strstr "$cmdline" readonlyroot ; then
	READONLY=yes
	[ -z "$RW_MOUNT" ] && RW_MOUNT=/var/lib/stateless/writable
	[ -z "$STATE_MOUNT" ] && STATE_MOUNT=/var/lib/stateless/state
fi
if strstr "$cmdline" noreadonlyroot ; then
	READONLY=no
fi

MOUNTS=()
if [ "$READONLY" = "yes" -o "$TEMPORARY_STATE" = "yes" ]; then

        add_mount() {
                mnt=${1%/}
                MOUNTS=("${MOUNTS[@]}" "$mnt")
        }

        cp_empty() {
                if [ -e "$1" ]; then
			echo "$1" | cpio -p -vd "$RW_MOUNT" &>/dev/null
                        add_mount $1
		fi
        }

        cp_dirs() {
		if [ -e "$1" ]; then
			mkdir -p "$RW_MOUNT$1"
			find "$1" -type d -print0 | cpio -p -0vd "$RW_MOUNT" &>/dev/null
                        add_mount $1
		fi
	}

        cp_files() {
		if [ -e "$1" ]; then
			cp -a --parents "$1" "$RW_MOUNT"
                        add_mount $1
		fi
	}

	# Common mount options for scratch space regardless of
	# type of backing store
	mountopts=

	# Scan partitions for local scratch storage
	rw_mount_dev=$(blkid -t LABEL="$RW_LABEL" -l -o device)

        bindmountopts=
        [ "$SLAVE_MOUNTS" = "yes" ] && bindmountopts="--make-slave"

	# First try to mount scratch storage from /etc/fstab, then any
	# partition with the proper label.  If either succeeds, be sure
	# to wipe the scratch storage clean.  If both fail, then mount
	# scratch storage via tmpfs.
	if mount $mountopts "$RW_MOUNT" > /dev/null 2>&1 ; then
		rm -rf "$RW_MOUNT" > /dev/null 2>&1
	elif [ x$rw_mount_dev != x ] && mount $rw_mount_dev $mountopts "$RW_MOUNT" > /dev/null 2>&1; then
		rm -rf "$RW_MOUNT"  > /dev/null 2>&1
	else
		mount -n -t tmpfs $RW_OPTIONS $mountopts none "$RW_MOUNT"
	fi

	for file in /etc/rwtab /etc/rwtab.d/* /run/initramfs/rwtab ; do
		is_ignored_file "$file" && continue
	[ -f $file ] && while read type path ; do
			case "$type" in
				empty)
					cp_empty $path
					;;
				files)
					cp_files $path
					;;
				dirs)
					cp_dirs $path
					;;
				*)
					;;
			esac
                done < <(cat $file)
	done

        for m in "${MOUNTS[@]}"; do
                prefix=0
                for mount_point in "${MOUNTS[@]}"; do
                        [[ $m = $mount_point ]] && continue
                        if [[ $m =~ ^$mount_point/.* ]] ; then
                                prefix=1
                                break
                        fi
                done
                [[ $prefix -eq 1 ]] && continue

                mount -n --bind $bindmountopts "$RW_MOUNT$m" "$m"
	        selinux_fixup "$m"
        done

	# Use any state passed by initramfs
	[ -d /run/initramfs/state ] && cp -a /run/initramfs/state/* $RW_MOUNT

	# In theory there should be no more than one network interface active
	# this early in the boot process -- the one we're booting from.
	# Use the network address to set the hostname of the client.  This
	# must be done even if we have local storage.
	ipaddr=
	if [ "$HOSTNAME" = "localhost" -o "$HOSTNAME" = "localhost.localdomain" ]; then
		ipaddr=$(ip addr show to 0.0.0.0/0 scope global | awk '/[[:space:]]inet / { print gensub("/.*","","g",$2) }')
		for ip in $ipaddr ; do
			HOSTNAME=
			eval $(ipcalc -h $ipaddr 2>/dev/null)
			[ -n "$HOSTNAME" ] && { hostname ${HOSTNAME} ; break; }