[LTP] [PATCH v2, 1/2] lib/tst_test.sh: Make tst_umount work with argument that

[Leo Liang <ycliang@andestech.com>]

Hi Yang,
On Fri, Jul 16, 2021 at 09:23:01AM +0800, xuyang2018.jy@fujitsu.com wrote:
> Hi Leo
> > /proc/mounts shows the mount point without terminating 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 terminating slash, e.g.
> > tst_umount cgroup/ would give "The device is not mounted".
> >
> > Fix this by using mountpoint command instead of grepping /proc/mounts.
> >
> > Signed-off-by: Leo Yu-Chi Liang<ycliang@andestech.com>
> > ---
> >   testcases/lib/tst_test.sh | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/testcases/lib/tst_test.sh b/testcases/lib/tst_test.sh
> > index c6aa2c487..7e77711f1 100644
> > --- a/testcases/lib/tst_test.sh
> > +++ b/testcases/lib/tst_test.sh
> > @@ -282,7 +282,7 @@ tst_umount()
> >
> >   	[ -z "$device" ]&&  return
> >
> > -	if ! grep -q "$device" /proc/mounts; then
> > +	if ! mountpoint -q "$device"; then
> Honestly speaking, I don't want to introduce mountpoint command.
> we can just filter the last "/" string for $device.
> 
> Best Regards
> Yang Xu

Got it! 
I'll send a v3 patch with this approach:
Filtering out the '/' when determining whether a $device is mounted.
Thanks!

Best regards,
Leo

> >   		tst_res TINFO "The $device is not mounted, skipping umount"
> >   		return
> >   	fi