linux-kernel - Re: [PATCH v2] selftests: watchdog: Add optional file argument

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Date:   Fri, 30 Aug 2019 09:12:10 -0600
From:   shuah <shuah@...nel.org>
To:     "George G. Davis" <george_davis@...tor.com>,
        Jerry Hoemann <jerry.hoemann@....com>,
        Colin Ian King <colin.king@...onical.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Cc:     Eugeniu Rosca <erosca@...adit-jv.com>, shuah <shuah@...nel.org>
Subject: Re: [PATCH v2] selftests: watchdog: Add optional file argument

On 8/30/19 6:53 AM, George G. Davis wrote:
> Some systems have multiple watchdog devices where the first device
> registered is assigned to the /dev/watchdog device file. In order
> to test other watchdog devices, add an optional file argument for
> selecting non-default watchdog devices for testing.
> 
> Tested-by: Eugeniu Rosca <erosca@...adit-jv.com>
> Signed-off-by: George G. Davis <george_davis@...tor.com>
> ---
> v1:
> - https://lkml.org/lkml/2019/8/29/16
> v2:
> - Update printf for ENOENT case based on report from Eugeniu Rosca
> ---
>   tools/testing/selftests/watchdog/watchdog-test.c | 19 ++++++++++++++++---
>   1 file changed, 16 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c
> index c2333c78cf04..9f17cae61007 100644
> --- a/tools/testing/selftests/watchdog/watchdog-test.c
> +++ b/tools/testing/selftests/watchdog/watchdog-test.c
> @@ -19,7 +19,7 @@
>   
>   int fd;
>   const char v = 'V';
> -static const char sopts[] = "bdehp:t:Tn:NL";
> +static const char sopts[] = "bdehp:t:Tn:NLf:";
>   static const struct option lopts[] = {
>   	{"bootstatus",          no_argument, NULL, 'b'},
>   	{"disable",             no_argument, NULL, 'd'},
> @@ -31,6 +31,7 @@ static const struct option lopts[] = {
>   	{"pretimeout",    required_argument, NULL, 'n'},
>   	{"getpretimeout",       no_argument, NULL, 'N'},
>   	{"gettimeleft",		no_argument, NULL, 'L'},
> +	{"file",          required_argument, NULL, 'f'},
>   	{NULL,                  no_argument, NULL, 0x0}
>   };
>   
> @@ -69,6 +70,7 @@ static void term(int sig)
>   static void usage(char *progname)
>   {
>   	printf("Usage: %s [options]\n", progname);
> +	printf(" -f, --file          Open watchdog device file (default is /dev/watchdog)\n");

Can you split this line into two printf's. Checkpatch doesn't like
it.

printf(" -f, --file          Open watchdog device file\n");
A second one below for default.

On a separate note, I wish this usage block uses \t instead of spacing
things out.

thanks,
-- Shuah