[PATCH 4/5] tests: Ensure that mountpoints are unmounted before exiting

[Glenn Washburn]

When all tests complete successfully, filesystems mounted by grub-fs-tester
will be unmounted before exiting. However, on certain test failures the
tester will exit with a failure code and not unmount previously mounted
filesystems. Now keep track of mounts and umounts and run an exit handler
on exit or process interruption that will umount all mounts that haven't
already been unmounted.

Signed-off-by: Glenn Washburn <development@efficientek.com>
---
 tests/util/grub-fs-tester.in | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/tests/util/grub-fs-tester.in b/tests/util/grub-fs-tester.in
index a1f3f299b..b39831f27 100644
--- a/tests/util/grub-fs-tester.in
+++ b/tests/util/grub-fs-tester.in
@@ -13,6 +13,17 @@ tempdir=`mktemp -d "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` ||
 # FSLABEL. This is especially needed for the conversion to Joliet UCS-2.
 XORRISOFS_CHARSET="-input-charset UTF-8 -output-charset UTF-8"
 
+MOUNTS=
+umount_all() {
+    for MOUNT in $MOUNTS; do
+       umount "$MOUNT" &&
+       MOUNTS="$(echo ${MOUNTS} | sed "s|$MOUNT||g;")"
+    done
+}
+trap umount_all EXIT INT
+# This is for bash, dash and ash do not recognize ERR
+trap umount_all ERR || :
+
 # This wrapper is to ease insertion of valgrind or time statistics
 run_it () {
     LC_ALL=C "$GRUBFSTEST" "$@"
@@ -934,6 +945,7 @@ for LOGSECSIZE in $(range "$MINLOGSECSIZE" "$MAXLOGSECSIZE" 
1); do
                        done
                        exit 99;
                    fi
+                   MOUNTS="$MOUNTS $MNTPOINTRW"
                    ;;
            esac
            case x"$fs" in
@@ -1058,11 +1070,13 @@ for LOGSECSIZE in $(range "$MINLOGSECSIZE" 
"$MAXLOGSECSIZE" 1); do
                x"bfs")
                    sleep 1
                    fusermount -u "$MNTPOINTRW"
+                   MOUNTS="$(echo ${MOUNTS} | sed "s|$MNTPOINTRW||g;")"
                    ;;
                xlvm*)
                    sleep 1
                    for try in $(range 0 20 1); do
                        if umount "$MNTPOINTRW" ; then
+                           MOUNTS="$(echo ${MOUNTS} | sed "s|$MNTPOINTRW||g;")"
                            break;
                        fi
                        sleep 1;
@@ -1075,6 +1089,7 @@ for LOGSECSIZE in $(range "$MINLOGSECSIZE" 
"$MAXLOGSECSIZE" 1); do
                    sleep 1
                    for try in $(range 0 20 1); do
                        if umount "$MNTPOINTRW" ; then
+                           MOUNTS="$(echo ${MOUNTS} | sed "s|$MNTPOINTRW||g;")"
                            break;
                        fi
                        sleep 1;
@@ -1087,6 +1102,7 @@ for LOGSECSIZE in $(range "$MINLOGSECSIZE" 
"$MAXLOGSECSIZE" 1); do
                    sleep 1
                    for try in $(range 0 20 1); do
                        if umount "$MNTPOINTRW" ; then
+                           MOUNTS="$(echo ${MOUNTS} | sed "s|$MNTPOINTRW||g;")"
                            break;
                        fi
                        sleep 1;
@@ -1116,13 +1132,19 @@ for LOGSECSIZE in $(range "$MINLOGSECSIZE" 
"$MAXLOGSECSIZE" 1); do
                xlvm*)
                    vgchange -a y grub_test
                    sleep 1
-                   mount -t "$MOUNTFS" "${MOUNTDEVICE}" "$MNTPOINTRO" -o 
${MOUNTOPTS}${SELINUXOPTS}ro ;;
+                   mount -t "$MOUNTFS" "${MOUNTDEVICE}" "$MNTPOINTRO" -o 
${MOUNTOPTS}${SELINUXOPTS}ro
+                   MOUNTS="$MOUNTS $MNTPOINTRO"
+                   ;;
                xmdraid*)
                    mdadm --assemble /dev/md/"${fs}_$NDEVICES" $LODEVICES
                    sleep 1
-                   mount -t "$MOUNTFS" "${MOUNTDEVICE}" "$MNTPOINTRO" -o 
${MOUNTOPTS}${SELINUXOPTS}ro ;;
+                   mount -t "$MOUNTFS" "${MOUNTDEVICE}" "$MNTPOINTRO" -o 
${MOUNTOPTS}${SELINUXOPTS}ro
+                   MOUNTS="$MOUNTS $MNTPOINTRO"
+                   ;;
                *)
-                   mount -t "$MOUNTFS" "${MOUNTDEVICE}" "$MNTPOINTRO" -o 
${MOUNTOPTS}${SELINUXOPTS}ro ;;
+                   mount -t "$MOUNTFS" "${MOUNTDEVICE}" "$MNTPOINTRO" -o 
${MOUNTOPTS}${SELINUXOPTS}ro
+                   MOUNTS="$MOUNTS $MNTPOINTRO"
+                   ;;
            esac
 
            run_grubfstest ls -- -la
@@ -1547,6 +1569,8 @@ for LOGSECSIZE in $(range "$MINLOGSECSIZE" 
"$MAXLOGSECSIZE" 1); do
                    sleep 1
                    umount "$MNTPOINTRO"  || true
                    umount "$MNTPOINTRW" || true
+                   MOUNTS="$(echo ${MOUNTS} | sed "s|$MNTPOINTRO||g;")"
+                   MOUNTS="$(echo ${MOUNTS} | sed "s|$MNTPOINTRW||g;")"
            esac
            sleep 1
            case x"$fs" in
-- 
2.27.0