X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=scripts%2Fboot%2Fread-only.sh;h=48aa06c3960450d8aaae654de75c4c2569502982;hb=5a6fb1a5946c4945416d932d86e8f59671c80228;hp=c8990dfcf0dbeb6fea44fab532cbd56bf814f287;hpb=9657ab15cc02aa4c8311ed66dcc95a0b350ce1bb;p=live-boot-grml.git

diff --git a/scripts/boot/read-only.sh b/scripts/boot/read-only.sh
index c8990df..48aa06c 100755
--- a/scripts/boot/read-only.sh
+++ b/scripts/boot/read-only.sh
@@ -4,14 +4,30 @@
 
 Read_only ()
 {
-	# Marking the usual block devices for harddisks read-only
-	for _DEVICE in /dev/sd* /dev/vd*
+	# Marking some block devices as read-only to ensure that nothing
+	# gets written as linux still writes to 'only' read-only mounted filesystems.
+	_DEVICES="/dev/sd* /dev/vd*"
+
+	for _DEVICE in ${_DEVICES}
 	do
-		if [ -b "${_DEVICE}" ]
+		if [ ! -b "${_DEVICE}" ]
 		then
-			printf "Setting device %-9s to read-only mode:" ${_DEVICE} > /dev/console
-
-			blockdev --setro ${_DEVICE} && printf " done [ execute \"blockdev --setrw %-9s\" to unlock]\n" ${_DEVICE} > /dev/console || printf "failed\n" > /dev/console
+			continue
 		fi
+
+		echo -n "Setting ${_DEVICE} read-only..." > /dev/console
+
+		blockdev --setro ${_DEVICE}
+		_RETURN="${?}"
+
+		case "${_RETURN}" in
+			0)
+				echo " done, use 'blockdev --setrw ${_DEVICE}' to set read-write." > /dev/console
+				;;
+
+			*)
+				echo " failed." > /dev/console
+				;;
+		esac
 	done
 }