[PATCH v2 3/8] tests: When checking squashfs fstime, use superblock last modified time

[Glenn Washburn <development@efficientek.com>]

Currently, the filesystem timestamp check in grub-fs-tester uses the
squashfs image file's last modified timestamp and checks to see if that
time stamp is within 3 seconds of the superblock timestamp as determined by
grub. The image file's timestamp could be more than 3 seconds off if
mksquashfs takes more than 3 seconds to generate the image, as is the case
on a virtual machine. Instead use squashfs tools to get the filesystem
timestamp directly.

Signed-off-by: Glenn Washburn <development@efficientek.com>
---
 tests/util/grub-fs-tester.in | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tests/util/grub-fs-tester.in b/tests/util/grub-fs-tester.in
index bfc425e1f..4213b7bfc 100644
--- a/tests/util/grub-fs-tester.in
+++ b/tests/util/grub-fs-tester.in
@@ -1351,6 +1351,12 @@ for LOGSECSIZE in $(range "$MINLOGSECSIZE" "$MAXLOGSECSIZE" 1); do
 			# With some abstractions like mdraid flushing to disk
 			# may be delayed for a long time.
 			FSTIME="$UMOUNT_TIME";;
+		    xsquash*)
+			# Creating the squash image may take more than a few
+			# seconds. Use the more accurate timestamp from the
+			# superblock.
+			FSTIME="$(unsquashfs -s "${FSIMAGEP}0.img" | grep ^Creation | awk '{print $6 " " $7 " " $8 " " $9 " " $10; }')"
+			FSTIME="$(date -d "$FSTIME" -u '+%Y-%m-%d %H:%M:%S')";;
 		    *)
 			FSTIME="$(TZ=UTC ls --time-style="+%Y-%m-%d_%H:%M:%S" -l -d "${FSIMAGEP}0.img"|awk '{print $6; }'|sed 's,_, ,g')";;
 		esac
-- 
2.27.0