mount: add a test for bind+rshared

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

testsuite/mount.tests

@@ -20,7 +20,7 @@ if test x"$CONFIG_MKFS_MINIX" != x"y" \
 	exit 0
 fi
 
-testdir=$PWD/mount.testdir
+testdir="$PWD/mount.testdir"
 
 dd if=/dev/zero of=mount.image1m count=1 bs=1M 2>/dev/null || { echo "dd error"; exit 1; }
 mkfs.minix -v mount.image1m >/dev/null 2>&1 || { echo "mkfs.minix error"; exit 1; }
@@ -44,4 +44,41 @@ umount -d "$testdir"
 rmdir "$testdir"
 rm mount.image1m
 
+
+# Bug: mount.shared1 directory shows no files (has to show files a and b)
+testing "mount bind+rshared" "\
+mkdir -p mount.dir mount.shared1 mount.shared2
+touch mount.dir/a mount.dir/b
+
+mount --bind         mount.shared1 mount.shared1 2>&1
+mount --make-rshared mount.shared1               2>&1
+mount --bind         mount.shared2 mount.shared2 2>&1
+mount --make-rshared mount.shared2               2>&1
+
+mount --bind mount.shared2 mount.shared1         2>&1
+mount --bind mount.dir     mount.shared2         2>&1
+
+ls -R mount.dir mount.shared1 mount.shared2      2>&1
+
+umount mount.dir mount.shared1 mount.shared2 2>/dev/null
+umount mount.dir mount.shared1 mount.shared2 2>/dev/null
+umount mount.dir mount.shared1 mount.shared2 2>/dev/null
+rm -f mount.dir/a mount.dir/b mount.dir/c
+rmdir mount.dir mount.shared1 mount.shared2
+" \
+"\
+mount.dir:
+a
+b
+
+mount.shared1:
+a
+b
+
+mount.shared2:
+a
+b
+" \
+	"" ""
+
 exit $FAILCOUNT