1 files changed, 62 insertions, 0 deletions
diff --git a/system-boot/components/3020-swap b/system-boot/components/3020-swap
new file mode 100755
index 0000000..345b9a0
--- /dev/null
+++ b/system-boot/components/3020-swap
@@ -0,0 +1,62 @@
+#!/bin/sh
+
+#set -e
+
+Swap ()
+{
+	for _PARAMETER in ${LIVE_BOOT_CMDLINE}
+	do
+		case "${_PARAMETER}" in
+			live-boot.swap=*|swap=*)
+				LIVE_SWAP="true"
+				LIVE_SWAP_DEVICES="${_PARAMETER#*swap=}"
+				;;
+
+			live-boot.swap|swap)
+				LIVE_SWAP="true"
+				;;
+		esac
+	done
+
+	case "${LIVE_SWAP}" in
+		true)
+			;;
+
+		*)
+			return 0
+			;;
+	esac
+
+	LIVE_SWAP_DEVICES="${LIVE_SWAP_DEVICES:-/dev/sd* /dev/vd*}"
+
+	for _DEVICE in $(echo ${LIVE_SWAP_DEVICES} | sed -e 's|,| |g')
+	do
+		if [ ! -b "${_DEVICE}" ]
+		then
+			continue
+		fi
+
+		blkid -o udev -p ${_DEVICE%%[0-9]*} | grep -q "^ID_FS_USAGE=raid" && continue
+
+		_MAGIC="$(/bin/dd if=${_DEVICE} bs=4086 skip=1 count=1 2>/dev/null | /bin/dd bs=10 count=1 2>/dev/null)" || continue
+
+		case "${_MAGIC}" in
+			SWAPSPACE2|SWAP-SPACE)
+				_SWAP_DEVICES="${_SWAP_DEVICES} ${_DEVICE}"
+				;;
+		esac
+	done
+
+	# Remove all auto swap entries
+	if grep -qs "swap swap" /root/etc/fstab
+	then
+		grep -v "swap swap" /root/etc/fstab > /root/etc/fstab.tmp
+		mv /root/etc/fstab.tmp /root/etc/fstab
+	fi
+
+	# Add new swap entries
+	for _DEVICE in ${_SWAP_DEVICES}
+	do
+		echo "${_DEVICE} swap swap defaults 0 0" >> /root/etc/fstab
+	done
+}