Re: [PATCH] [man-pages] adjtimex.2: document clock_adjtime
From: Michael Kerrisk (man-pages)
Date: Mon Dec 18 2017 - 14:19:54 EST
On 11/21/2017 05:06 PM, Richard Cochran wrote:
> On Tue, Nov 21, 2017 at 09:06:37AM +0100, Arnd Bergmann wrote:
>> I copied that line from clock_gettime() man page. I suppose we want to
>> fix change this in both pages, right? Any suggestions for a good way to
>> express your explanation in the man page? I suppose we don't want to
>> go into details of the implementation there but still capture the possible
>> corner cases.
> Dynamic clockids are a Linux specific extension. This should be
> explained with a paragraph or two on the gettime man page, along with
> an example using the macros.
> #define CLOCKFD 3
> #define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD)
> #define CLOCKID_TO_FD(clk) ((unsigned int) ~((clk) >> 3))
> Then, the adjtimex page can say, see gettime.
> Let me try to come up with a text over the (USA) holiday weekend.
Might you have a chance to look at this still?
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/