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

[Glenn Washburn]

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