From bc9ae2d777db55ecb3697185da60ece205b1b90b Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel@debian.org>
Date: Tue, 5 Jun 2012 18:16:05 +0200
Subject: Updating read-only handling to new parameter handling.

---
 scripts/boot/read-only.sh | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

(limited to 'scripts/boot/read-only.sh')

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
 }
-- 
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