Re: How can Emacs get a unique ID per Linux reboot?
Richard Gooch (rgooch@atnf.csiro.au)
Tue, 1 Jun 1999 14:48:33 +1000
H. Peter Anvin writes:
> Followup to: <199906010238.TAA18495@shade.twinsun.com>
> By author: Paul Eggert <eggert@twinsun.com>
> In newsgroup: linux.dev.kernel
> >
> > For most operating systems, BOOTID is the timestamp of the last
> > reboot. For example, if I edit FOO on Solaris 7, Emacs might create a
> > symbolic link from .#FOO to eggert@shade.twinsun.com.18323:924306205,
> > since shade.twinsun.com was last rebooted 924306205 seconds after
> > 1970-01-01 00:00:00 UTC.
> >
> > Unfortunately, RMS and I haven't been able to discover a documented,
> > guaranteed, and fast way to get a unique reboot ID for Linux.
> >
>
> Get the current uptime from /proc/uptime and subtract that from the
> current time.
Won't that foul up if the system is suspended (system clock is
restored from hwclock on resume)?
And probably also when settimeofday() is called?
Regards,
Richard....
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