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

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Date:	Wed, 25 Jun 2014 13:05:44 -0700
From:	Davidlohr Bueso <davidlohr@...com>
To:	Shuah Khan <shuah.kh@...sung.com>
Cc:	gregkh@...uxfoundation.org, akpm@...ux-foundation.org,
	colin.king@...onical.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tools: msgque improve error handling when not running
 as root

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@...sung.com>
> ---
>  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).

> +	printf("Starting ipc tests:\n");

This is unnecessary and adds nothing to the program.

>  	msgque.key = ftok(argv[0], 822155650);
>  	if (msgque.key == -1) {
>  		printf("Can't make key\n");
> @@ -235,6 +241,7 @@ int main(int argc, char **argv)
>  		printf("Failed to test queue\n");
>  		goto err_out;
>  	}
> +	printf("All ipc tests Passsed\n");

So is this.

>  	return 0;
>  
>  err_destroy:


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