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Message-ID: <20190114205345.Horde.IcnVhJs0RGJWUQBLwJoyrNv@webmail.michael-kaufmann.ch>
Date: Mon, 14 Jan 2019 20:53:45 +0100
From: Michael Kaufmann <mail@...hael-kaufmann.ch>
To: musl@...ts.openwall.com
Subject: Re: Use local time in syslog() function
>> I have found a bug in the implementation of syslog(). It should use
>> the local time instead of UTC when sending the message to /dev/log.
>> So in src/misc/syslog.c, the call to gmtime_r() should be replaced
>> with localtime_r().
>
> This is not a bug; rather, use of local time there in glibc and other
> systems is a bug. Local time varies by the sending process and
> produces inconsistent and uninterpretable log messages. Moreover the
> syslog() function is not specified to depend on the environment and
> thereby is not allowed to call any function whose behavior is
> dependant on the environment.
Thank you for responding!
I agree that GMT would have been a better choice, but I think local
time is also mandated by RFC 3164,
https://tools.ietf.org/html/rfc3164#section-4.1.2 : "The TIMESTAMP
field is the local time". Or does this RFC not apply for syslog() on
Linux?
There's also this older discussion:
https://www.openwall.com/lists/musl/2014/01/28/2 - sorry, I have not
found it before.
Regards,
Michael
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