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Date: Wed, 7 Dec 2011 09:50:50 -0500
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From: Jeff Trawick <trawick@gmail.com>
To: users@httpd.apache.org
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Subject: Re: [users@httpd] piped logs problem on sco 6.0.0

On Wed, Dec 7, 2011 at 9:15 AM, Rob Landrito <rlandrito@gmail.com> wrote:
> Thanks for your suggestions. =A0httpd starts cleanly with nouser and
> nogroup fine as long as I'm not trying to pipe logs. =A0If I only try to
> pipe access_log and not error_log, httpd starts but no access logs are
> created (I'm sending requests to the servers). =A0The only difference I
> see in error_log are the following two lines:
>
> piped log program '/opt/httpd/bin/rotatelogs -fl
> /opt/httpd/logs/access_log.%d-%b 86400' failed unexpectedly

Run strace/truss/whatever against a running rotatelogs process before
it has to handle an access log entry, see what is happening at syscall
level.

> [Wed Dec 07 06:08:13 2011] [error] (22)Invalid argument: setting of group=
 failed

Weird.  That's from apr_proc_create(), which might be called for a
piped logger.  The implication seems to be that
apr_procattr_user_set() or apr_procattr_group_set() has been called,
but I don't see that in 2.2.x.

Perhaps this httpd has some custom/vendor patches?  Perhaps I didn't
look carefully enough at one bit of code or another?

>
> They pop up a number of times throughout the error_log, presumably
> every time it's trying to write to access_log. =A0I should note that I
> can run rotatelogs just fine from the command line as nouser or root.
>
>
> 2011/12/6 Jeff Trawick <trawick@gmail.com>:
>> On Tue, Dec 6, 2011 at 1:47 PM, Rob Landrito <rlandrito@gmail.com> wrote=
:
>>> Greetings,
>>>
>>> I'm trying to used piped logs as described here:
>>> http://httpd.apache.org/docs/2.2/logs.html#piped. =A0The environment is
>>> httpd 2.2.11 on sco 6.0.0 (SCO_SV system 5 6.0.0 i386). =A0I'm using
>>> User nouser
>>> Group nogroup
>>>
>>> Apache is unable to start, printing the following to stderr on startup:
>>> [Tue Dec 06 13:09:59 2011] [error] (22)Invalid argument: setting of
>>> group failedBroken Pipe
>>
>> That's the concatenation of two different error messages.
>>
>> Switch your error log temporarily to a file instead of to a piped
>> logger, and make sure everything starts up cleanly. =A0(It looks like
>> you'll have to modify the Group directive.)
>>
>> Then try using a piped logger for the access log, again with a simpler
>> logging mechanism for the error log.
>>
>>
>>>
>>> It doesn't seem to matter what program I use on the other end of the
>>> pipe. =A0I'm actually trying to use rotatelogs but echo seems to have
>>> the same problem. =A0I've tried various setuid tricks just to see if I
>>> could pinpoint the issue. =A0I suid'd the rotatelogs binary to root as
>>> well as nouser and neither seemed to help. =A0I suspect that this
>>> problem is isolated to SCO. =A0Any ideas would be appreciated.
>>>
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>>
>>
>>
>> --
>> Born in Roswell... married an alien...
>>
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>
>
>
> --
> :wq!
>
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--=20
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