Yo Hal! On Mon, 16 Sep 2019 14:09:45 -0700 Hal Murray <hmur...@megapathdsl.net> wrote:
> devel@ntpsec.org said:
> > I'd like to see "struct shmTimme" cleaned up and move into a header
> > file for system use.. Right now it is not in any header file, so
> > clients like gpsd need their own copies.
>
> Assume we had a nice header file. Where would it live?
gpsd installs gps.h, the header for libgps, in $PREFIX/include/gps.h
I would assume similar for NTPsec: $PREFIX/include/ntpsec.h
> What are the
> mechanics of getting it to ntpsec or gpsd?
Using it in gpsd would be simple. scons would check for the include
file, then set "#define HAVE_NTPSEC_H 1" in gpsd_config.h if found.
The gpsd/ntpshm.h would test that to either include that new header,
or use the local shmTime definition.
> Maybe another project with the sample/test code?
No need to get fancy, to start it is just the one "struct shmTime".
> I think we should put the current stuff on the back burner and make a
> new SHM interface where the clients are read only.
ntpshmmon, from gpsd, is already read-only on the SHMs.
> Is shmget/shmat the right API to use? I remember discussions of
> there being a wrong API but don't remember any details.
First gpsd and NTPsec need to be on the same page (include file).
Anything new would take a long time to replace the current API. Too
much stuff uses it.
RGDS
GARY
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