From 66822df31ae3ddceb72fe269618338aadf3eca6f Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Fri, 25 May 2007 14:53:22 +0200
Subject: [PATCH] tests: cleanup blkid cache after test device deinitialization

The libblkid reuses cached information when a cache entry is younger
than 2 secs. That's wrong, because util-linux tests use devices
more quickly.

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 tests/README       |  6 ++++++
 tests/functions.sh | 31 ++++++++++++++++++++++++++-----
 2 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/tests/README b/tests/README
index 8eca0854..783f37c6 100644
--- a/tests/README
+++ b/tests/README
@@ -14,3 +14,9 @@
 
 	./ts-<component_name>-<test_name>.sh [--verbose]
 
+
+
+ *** WARNING ***
+
+ The tests touch your /etc/fstab and /etc/blkid.tab. Please, be careful and use
+ these tests only for development and never on production system.
diff --git a/tests/functions.sh b/tests/functions.sh
index ba94ad4d..ed435092 100644
--- a/tests/functions.sh
+++ b/tests/functions.sh
@@ -57,6 +57,20 @@ function ts_init {
 	TS_EXPECTED="$TS_EXPECTEDDIR/$TS_NAME"
 	TS_INPUT="$TS_INPUTDIR/$TS_NAME"
 	TS_MOUNTPOINT="$(pwd)/$TS_OUTDIR/${TS_NAME}_mnt"
+	TS_BLKIDCACHE=""
+	TS_HAS_VOLUMEID="no"
+
+	ldd $TS_CMD_MOUNT | grep -q 'libvolume_id' &> /dev/null
+	if [ "$?" == "0" ]; then
+		TS_HAS_VOLUMEID="yes"
+	fi
+	if [ "$TS_HAS_VOLUMEID" != "yes" ]; then
+		if [ -f "/etc/blkid/blkid.tab" ]; then
+			TS_BLKIDCACHE="/etc/blkid/blkid.tab"
+		elif [ -f "/etc/blkid.tab" ]; then
+			TS_BLKIDCACHE="/etc/blkid.tab"
+		fi
+	fi
 
 	rm -f $TS_OUTPUT
 	touch $TS_OUTPUT
@@ -101,6 +115,10 @@ function ts_device_init {
 	local IMAGE_RE=$( echo "$IMAGE" | sed 's:/:\\/:g' )
 	local DEV=""
 
+	if [ "$TS_HAS_VOLUMEID" != "yes" ] && [ -f "$TS_BLKIDCACHE" ]; then
+		cp $TS_BLKIDCACHE $OUTDIR/$TS_NAME.cache
+	fi
+
 	dd if=/dev/zero of="$IMAGE" bs=1M count=5 &> /dev/null
 
 	$TS_CMD_LOSETUP -f "$IMAGE" 2>&1 >> $TS_OUTPUT
@@ -121,15 +139,18 @@ function ts_device_deinit {
 	if [ -b "$DEV" ]; then
 		$TS_CMD_UMOUNT "$DEV" &> /dev/null
 		$TS_CMD_LOSETUP -d "$DEV" &> /dev/null
+		if [ "$TS_HAS_VOLUMEID" !=  "yes" ] && [ -f "$TS_BLKIDCACHE" ] && [ -s "$OUTDIR/$TS_NAME.cache" ]; then
+			# We have to remove the device from cache otherwise
+			# libblkid will reuse cached information. The cache
+			# refresh time is 2 seconds -- that's too long. We
+			# re-use the same device more quickly.  --kzak
+			mv -f $OUTDIR/$TS_NAME.cache $TS_BLKIDCACHE
+		fi	
 	fi
 }
 
 function ts_udev_dev_support {
-	ldd $TS_CMD_MOUNT | grep -q 'libvolume_id' 2>&1 >> $TS_OUTPUT
-	if [ "$?" == "0" ]; then
-		local HAS_VOLUMEID="yes"
-	fi
-	if [ -n "$HAS_VOLUMEID" ] && [ ! -L "/dev/disk/$1/$2" ]; then
+	if [ "$TS_HAS_VOLUMEID" == "yes" ] && [ ! -L "/dev/disk/$1/$2" ]; then
 		return 1
 	fi
 	return 0
-- 
2.39.5