[LTP] [PATCH v3, 1/2] lib/tst_test.sh: Make tst_umount work with argument that has trailing slash

[xuyang2018.jy@fujitsu.com <xuyang2018.jy@fujitsu.com>]

Hi Leo

> /proc/mounts shows the mount point without trailing slashes, e.g.
> ~ $ cat /proc/mounts
> xxx /root/cgroup cgroup rw,relatime,cpu 0 0
>
> So current tst_umount would not work with argument that has trailing slash, e.g.
> tst_umount cgroup/ would give "The device is not mounted".
>
> Fix this by filtering out the trailing slash before grepping /proc/mounts.
>
> Signed-off-by: Leo Yu-Chi Liang<ycliang@andestech.com>
> ---
>   testcases/lib/tst_test.sh | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/testcases/lib/tst_test.sh b/testcases/lib/tst_test.sh
> index c6aa2c487..f132512e7 100644
> --- a/testcases/lib/tst_test.sh
> +++ b/testcases/lib/tst_test.sh
> @@ -282,13 +282,14 @@ tst_umount()
>
>   	[ -z "$device" ]&&  return
>
> +	device=${device%/}
>   	if ! grep -q "$device" /proc/mounts; then
>   		tst_res TINFO "The $device is not mounted, skipping umount"
>   		return
>   	fi
>
>   	while [ "$i" -lt 50 ]; do
> -		if umount "$device">  /dev/null; then
> +		if umount "$device"/>  /dev/null; then
With removing this(we don't need add "/" here), this patch looks good to me
Reviewed-by: Yang Xu <xuyang2018.jy@fujitsu.com>
>   			return
>   		fi
>