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SubjectRe: [PATCH] ptp: measure the time offset between PHC and system clock
Hello.

On 09/14/2013 12:03 PM, Dong Zhu wrote:

> This patch add a method into testptp.c to measure the time offset
> between phc and system clock through the ioctl PTP_SYS_OFFSET.

> Signed-off-by: Dong Zhu <bluezhudong@gmail.com>
> ---
> Documentation/ptp/testptp.c | 40 ++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 38 insertions(+), 2 deletions(-)

> diff --git a/Documentation/ptp/testptp.c b/Documentation/ptp/testptp.c
> index f59ded0..72bb030 100644
> --- a/Documentation/ptp/testptp.c
> +++ b/Documentation/ptp/testptp.c
[...]
> @@ -376,6 +387,31 @@ int main(int argc, char *argv[])
> }
> }
>
> + if (offset) {
> + sysoff = calloc(1, sizeof(*sysoff));
> + if (!sysoff) {
> + perror("calloc");
> + return -1;
> + }
> + sysoff->n_samples = n_samples;
> +
> + if (ioctl(fd, PTP_SYS_OFFSET, sysoff))
> + perror("PTP_SYS_OFFSET");
> + else
> + puts("time offset between PHC and
> + system clock request okay");

Don't break the string constant that way, there'll be all spaces between
"and" and "system" included in it. Do it like this:

puts("time offset between PHC and "
"system clock request okay");

WBR, Sergei



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