From 05dd30f7923913a060d7bef57b167386c988bc7c Mon Sep 17 00:00:00 2001
From: Tails developers <amnesia@boum.org>
Date: Thu, 10 Nov 2011 19:24:13 +0100
Subject: [PATCH] Adding persistent-read-only boot parameter.

It currently only makes snapshots read-only. Support for overlays will
be a bit more complicated to implement.
---
 scripts/live | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/scripts/live b/scripts/live
index 688c0a7..970853c 100755
--- a/scripts/live
+++ b/scripts/live
@@ -262,6 +262,10 @@ Arguments ()
 				PERSISTENT_PATH="${ARGUMENT#persistent-path=}"
 				export PERSISTENT_PATH
 				;;
+			persistent-read-only)
+				PERSISTENT_READONLY="Yes"
+				export PERSISTENT_READONLY
+				;;
 
 			persistent-storage=*)
 				PERSISTENT_STORAGE="${ARGUMENT#persistent-storage=}"
@@ -1186,7 +1190,10 @@ try_snap ()
 		return 1
 	fi
 
-	echo "export ${snap_type}SNAP=${snap_relpath}:${snapdev}:${snapfile}" >> snapshot.conf # for resync on reboot/halt
+	if [ -z ${PERSISTENT_READONLY} ]
+	then
+		echo "export ${snap_type}SNAP=${snap_relpath}:${snapdev}:${snapfile}" >> snapshot.conf # for resync on reboot/halt
+	fi
 	return 0
 }
 
-- 
2.1.4