From e2d2d40b67bdbbef25f1b53f4fbc2eedc72f12cd Mon Sep 17 00:00:00 2001
From: Tails developers <amnesia@boum.org>
Date: Sat, 11 Feb 2012 21:27:48 +0100
Subject: [PATCH] Accept using several persistent media with custom-ov label.

We didn't want this before with live-{rw,sn} and home-{rw,sn} style
persistence, so this was just a left-over. But we still can only allow
one each of root-ov, root-sn and home-sn.
---
 scripts/live         | 22 +++++++++++++++++-----
 scripts/live-helpers |  4 ----
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/scripts/live b/scripts/live
index 6f0dc48..494abc7 100755
--- a/scripts/live
+++ b/scripts/live
@@ -1403,23 +1403,35 @@ setup_unionfs ()
 			snapshots="${root_snapshot_label} ${home_snapshot_label}"
 		fi
 
-		overlay_devices=""
+		local root_snapdata=""
+		local home_snapshot_label=""
+		local root_overlay_label=""
+		local overlay_devices=""
 		for media in $(find_persistent_media "${overlays}" "${snapshots}" "${blacklistdev}" "${whitelistdev}")
 		do
 			media="$(echo ${media} | tr ":" " ")"
 			case ${media} in
 				${root_snapshot_label}=*)
-					root_snapdata="${media#*=}"
+					if [ -z "${root_snapdata}" ]
+					then
+						root_snapdata="${media#*=}"
+					fi
 					;;
 				${home_snapshot_label}=*)
 					# This second type should be removed when snapshot will get smarter,
 					# hence when "/etc/live-snapshot*list" will be supported also by
 					# ext2|ext3|ext4|jffs2 snapshot types.
-					home_snapdata="${media#*=}"
+					if [ -z "${home_snapdata}" ]
+					then
+						home_snapdata="${media#*=}"
+					fi
 					;;
 				${root_overlay_label}=*)
-					device="${media#*=}"
-					root_overlay_device="${device}"
+					if [ -z "${root_overlay_device}" ]
+					then
+						device="${media#*=}"
+						root_overlay_device="${device}"
+					fi
 					;;
 				${custom_overlay_label}=*)
 					device="${media#*=}"
diff --git a/scripts/live-helpers b/scripts/live-helpers
index c1efeec..f1ebe86 100644
--- a/scripts/live-helpers
+++ b/scripts/live-helpers
@@ -401,8 +401,6 @@ find_persistent_media ()
 			do
 				if [ "$(/sbin/blkid -s LABEL -o value $dev 2>/dev/null)" = "${label}" ]
 				then
-					overlays=$(echo ${overlays} | sed -e "s|\<${label}\>||")
-					snapshots=$(echo ${snapshots} | sed -e "s|\<${label}\>||")
 					echo "${label}=${dev}"
 					# skip to the next device
 					continue 2
@@ -424,7 +422,6 @@ find_persistent_media ()
 					path=${backing}/${PERSISTENT_PATH}${label}
 					if [ -f "${path}" ]
 					then
-						overlays=$(echo ${overlays} | sed -e "s|\<${label}\>||")
 						overlay_on_dev="yes"
 						echo "${label}=$(setup_loop "${path}" "loop" "/sys/block/loop*")"
 					fi
@@ -437,7 +434,6 @@ find_persistent_media ()
 						path="${PERSISTENT_PATH}${label}.${ext}"
 						if [ -f "${backing}/${path}" ]
 						then
-							snapshots=$(echo ${snapshots} | sed -e "s|\<${label}\>||")
 							snapshot_on_dev="yes"
 							echo "${label}=${dev}:${backing}:${path}"
 						fi
-- 
2.1.4