Re: [PATCH] tools: msgque improve error handling when not running as root

[Shuah Khan]

On 06/25/2014 02:05 PM, Davidlohr Bueso wrote:
> On Wed, 2014-06-25 at 13:40 -0600, Shuah Khan wrote:
> > The test fails in the middle when it is not run as root while
> > accessing /proc/sys/kernel/msg_next_id. Changed it to check
> > for root at the beginning of the test. Also added messages
> > to indicate start and test pass status.
> >
> > Signed-off-by: Shuah Khan <shuah.kh@xxxxxxxxxxx>
> > ---
> >   tools/testing/selftests/ipc/msgque.c | 7 +++++++
> >   1 file changed, 7 insertions(+)
> >
> > diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> > index aa290c0..30c627a 100644
> > --- a/tools/testing/selftests/ipc/msgque.c
> > +++ b/tools/testing/selftests/ipc/msgque.c
> > @@ -193,6 +193,12 @@ int main(int argc, char **argv)
> >   	int msg, pid, err;
> >   	struct msgque_data msgque;
> >
> > +	if (getuid() != 0) {
> > +		fprintf(stderr, "Please run the test as root - Exiting.\n");
> > +		exit(1);
> > +	}
>
> Please use err(3).

I will make this printf to be consistent with the rest of the
printfs in this file.

> > +	printf("Starting ipc tests:\n");
>
> This is unnecessary and adds nothing to the program.

The reason for doing this is it becomes easier to parse when this test
is run as part of run_tests at the top level:

make -C tools/testing/selftests run_tests

-- Shuah

--
Shuah Khan
Senior Linux Kernel Developer - Open Source Group
Samsung Research America(Silicon Valley)
shuah.kh@xxxxxxxxxxx | (970) 672-0658
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