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devel / comp.lang.python / Re: Getting Syslog working on OSX Monterey

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o Re: Getting Syslog working on OSX MontereyPhilip Bloom

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Re: Getting Syslog working on OSX Monterey

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Subject: Re: Getting Syslog working on OSX Monterey
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 by: Philip Bloom - Thu, 3 Mar 2022 19:29 UTC

Grabbing latest python that does work. Good we're about to get out of the
stone ages a bit here.

So findings:
Syslog - works in 3.10, broken against monterey in 3.6.
Logging.Handlers.Sysloghandler - is broken in both against Monterey.

Will bug it for the tracker. Thanks for the feedback.

On Thu, Mar 3, 2022 at 10:32 AM Barry Scott <barry@barrys-emacs.org> wrote:

>
>
> On 3 Mar 2022, at 03:01, Philip Bloom <philip.bloom@applovin.com> wrote:
>
> I'm probably asking on the wrong list, and probably should bother wherever
> apple's ASL experts live for changes in monterey. Guess nobody else is
> seeing this?
>
> The same exact code is working just fine on OSX Big Sur, but on OSX
> Monterey it doesn't work at all. Users that haven't updated are having the
> program produce logs as it has for years through
> logging.handlers.SysLogHandler. Mac OSX definitely has a listening socket
> at '/var/run/syslog' which shows up in Console.app.
>
> Apologies, Barry. I'm not quite understanding your responses.
>
>
> This works:
>
> syslog.openlog(logoption=syslog.LOG_PID, facility=syslog.LOG_USER)
> syslog.syslog(syslog.LOG_NOTICE, 'QQQ test log')
>
> I see the "QQQ test log" when I run syslog command.
>
> And I can reproduce that logging.handlers.SysLogHandler does not work.
> I added debug to the SysLogHandler() code and see that it does indeed
> write into the /var/run/syslog socket.
> I suspect that macOS /var/run/syslog does not implement the RFC that this
> code depends on, but that a wild guess.
>
> I suggest that you write your own handler that uses syslog.syslog() and
> use that.
>
> Barry
>
>
> When we say OSX has no listener for Syslog, what is the Apple System Log
> and the general output to Console.app then? I thought that was the local
> syslog on OSX and had, for years, been behaving as such when using
> logging.handlers.SysLogHandler with a config in /etc/asl/ to define how it
> should be routed and the rollover/cleanup frequency.
>
> Thanks for replying, just having trouble understanding.
>
>
> On Mon, Feb 28, 2022 at 2:07 PM Barry Scott <barry@barrys-emacs.org>
> wrote:
>
>>
>>
>> > On 28 Feb 2022, at 21:41, Peter J. Holzer <hjp-python@hjp.at> wrote:
>> >
>> > On 2022-02-27 22:16:54 +0000, Barry wrote:
>> >> If you look at the code of the logging modules syslog handle you will
>> see that
>> >> it does not use syslog. It’s assuming that it can network to a syslog
>> listener.
>> >> Such a listener is not running on my systems as far as I know.
>> >>
>> >> I have always assumed that if I want a logger syslog handler that I
>> would have
>> >> to implement it myself. So far I have code that uses syslog directly
>> and have
>> >> not written that code yet.
>> >
>> > What do you mean by using syslog directly? The syslog(3) library
>> > function also just sends messages to a "syslog listener" (more commonly
>> > called a syslog daemon) - at least on any unix-like system I'm familiar
>> > with (which doesn't include MacOS). It will, however, always use the
>> > *local* syslog daemon - AFAIK there is no standard way to open a remote
>> > connection (many syslog daemons can be configured to forward messages to
>> > a remote server, however).
>>
>> I'm re-reading the code to check on what I'm seeing. (Its been a long
>> time since I last look deeply at this code).
>>
>> You can write to /dev/log if you pass that to
>> SysLogHandler(address='/dev/log'), but the default is to use a socket
>> to talk to a network listener on localhost:514. There are no deamons
>> listening on port 514 on my Fedora systems or mac OS.
>>
>> That is not what you would expect as the default if you are using the C
>> API.
>>
>> What you do not see used in the SyslogHandler() is the import syslog
>> and hence its nor using openlog() etc from syslog API.
>>
>> Barry
>>
>>
>>
>> > hp
>> >
>> > --
>> > _ | Peter J. Holzer | Story must make more sense than reality.
>> > |_|_) | |
>> > | | | hjp@hjp.at | -- Charles Stross, "Creative writing
>> > __/ | http://www.hjp.at/ | challenge!"
>> > --
>> > https://mail.python.org/mailman/listinfo/python-list
>>
>> --
>> https://mail.python.org/mailman/listinfo/python-list
>>
>
>
> --
> Philip Bloom
> Director, Services Engineering
> *AppLovin Corporation*
> M: (786)-338-1439 <786-338-1439>
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>
>
>
>
>
>

--
Philip Bloom
Director, Services Engineering
*AppLovin Corporation*
M: (786)-338-1439 <786-338-1439>
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