Date: Mon, 21 Jun 1999 19:50:29 -0400 From: Harlan Stenn <Harlan.Stenn@pfcs.com> To: hackers@freebsd.org Subject: dmesg date/timestamps Message-ID: <22750.930009029@brown.pfcs.com>
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There are several sorts of messages that get logged by the kernel where it
would be Really Nice if the messages were timestamped.
If syslogd is up and running (and the data gets stored before the system
dies) there is a good chance that syslogd will timestamp the messages.
One way to do this would be to import something like strftime and gmtime/
localtime into the kernel. While strftime seems potentially useful and
gmtime isn't all that miserable, I can't imagine throwing localtime into
the kernel.
As a potential alternative, I have some small, fast routines that will handle
converting an epoch date into MM DD and YYYY fields. Converting "seconds
since midnight" is pretty simple.
I see several potential problems/issues:
- I suspect many folks will want the timestamps in local time. The
question is how should we get the local time offset into the kernel?
I'm tempted to simply leave it as an int tz_offset/char *tzname in the
kernel, and let an "outside" process deal with changing these values.
If folks are Horribly Concerned about the race, we can have a value that
says {UCT,xST,xDT} and keep a separate offset/tzname for xST and xDT.
I have a concern that the timezone stuff will cause a small tempest...
- I suspect that there are folks would want to start using international
date formats instead of, say YYYYMMDD:HHMMSS[{+,-}OFFSET tzname]
This may require a bit too much code for something like this.
So, I guess I have the following questions for you:
- Does anybody object to seeing this capability in the kernel?
- Should I stick with a simple YYYYMMDD:HHMMSS[{+,-}OFFSET tzname] stamp?
- Should I use sysctl for the timezone stuff?
- When I'm done, should I submit this as a PR or should I ship it to
somebody for review? If the latter, who?
Please keep me in the Cc: list; I'm not currently subscribed to hackers.
H
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