Messages in this thread | | | Subject | Re: How can Emacs get a unique ID per Linux reboot? | Date | Tue, 01 Jun 1999 10:20:43 -0700 | From | "G. Allen Morris III" <> |
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How about generating a 32bit random number at boot time. There is a 1 in 2**32 of getting the same number after a reboot, but that should not be a large problem.
The hard part would be deciding how to access this number.
Allen
>>>Richard Gooch said: > 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.... > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.rutgers.edu > Please read the FAQ at http://www.tux.org/lkml/
--------------------------------- G. Allen Morris III
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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