[issue46914] On Osx Monterey(12.x), Logging.handlers.SysLogHandler does not work

[Philip Bloom]

Philip Bloom  added the comment:

> Do you mean just adding a note to the effect that SysLogHandler won't work on 
> macOS 12.2 because of changes to the syslog daemon on that platform?

Yes or removing the specific guidance about OSX handling on it, mostly just to 
reduce folks coming to ask as they transition to it.  That way it comes off 
that you need to provide a Syslog consumer to use the handler/not to expect one 
to exist on the platform.  Hope I'm phrasing that understandably.

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[issue46914] On Osx Monterey(12.x), Logging.handlers.SysLogHandler does not work

[Vinay Sajip]

Vinay Sajip  added the comment:

> If so, then it probably good to adjust ... since it still talks about it 
> being expected.

Do you mean just adding a note to the effect that SysLogHandler won't work on 
macOS 12.2 because of changes to the syslog daemon on that platform?

IIRC using the syslog module was not an option at the time SysLogHandler was 
added, I think because of both thread-safety and lack-of-functionality issues.

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[issue46914] On Osx Monterey(12.x), Logging.handlers.SysLogHandler does not work

[Philip Bloom]

Philip Bloom  added the comment:

I could certainly understand that.  It's a weird apple choice.  

If so, then it probably good to adjust 
https://docs.python.org/3/library/logging.handlers.html#sysloghandler since it 
still talks about it being expected.

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[issue46914] On Osx Monterey(12.x), Logging.handlers.SysLogHandler does not work

[Ronald Oussoren]

Ronald Oussoren  added the comment:

This is probably not a bug in python, but a change in system behaviour.

In particular, I've used the lsof command to check the open files for the 
syslogd proces on a macOS 10.13 and 12.2 system. On the former syslogd has 
/var/run/syslog open, on the latter it doesn't.

The feature to listen on this socket has been removed entirely, the 12.2 system 
no longer lists a "-bsd_in" option for syslogd in the manual page whereas it is 
both available and enabled by default on 10.13.

It might be possible to change the SyslogHandler to optionally use the syslog 
module to log, but I'm not sure it is worth doing this and that would 
definitely be a new feature.

--
resolution:  -> third party
type:  -> behavior

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[issue46914] On Osx Monterey(12.x), Logging.handlers.SysLogHandler does not work

[Ned Deily]

Change by Ned Deily :


--
nosy: +vinay.sajip

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[issue46914] On Osx Monterey(12.x), Logging.handlers.SysLogHandler does not work

[Philip Bloom]

New submission from Philip Bloom :

Hello, don't file these often so apologies for any mistakes, trying to be good 
python citizen here.

Checked this on the python-list first, and others reported it as reproducible.

The issue is:
On Osx Monterey(12.x), Logging.handlers.SysLogHandler does not work.  It won't 
throw any error but the ASL/Console.App does not see any messages from it.  On 
OSX Big Sur (11.x) this works just fine with the exact same code.

I think I've cut this into a small example proof that can be run to demonstrate 
the issue.  If this is run and any of the substrings are searched for in 
Console.App when it is checking events, only the QQQ message from SysLog will 
show up.

Gonna work around it likely on our end, but hope this helps it get fixed for a 
future version.

---

import logging
from logging.handlers import SysLogHandler

root_logger = logging.getLogger()
root_logger.setLevel(logging.DEBUG)
basic_datefmt = '%m/%d/%Y %I:%M:%S %p'

syslog_format = logging.Formatter(fmt='SetupCDNGUI: %(message)s', 
datefmt=basic_datefmt)

sys_handler = SysLogHandler(address='/var/run/syslog')
#sys_handler.encodePriority(SysLogHandler.LOG_USER, SysLogHandler.LOG_ALERT)
# Tried with the above, but didn't make a difference.  Neither did not defining 
the address and letting it go to local host.
sys_handler.setFormatter(syslog_format)
root_logger.addHandler(sys_handler)


# None of these will show up.
logging.critical("CCC This is a test critical")
logging.error("EEE This is a test error")
logging.info("III Still a test")


# Comparatively this sends a message received just fine
import syslog

syslog.openlog(logoption=syslog.LOG_PID, facility=syslog.LOG_USER)
syslog.syslog(syslog.LOG_NOTICE, 'QQQ test log')

--
components: macOS
messages: 414464
nosy: ned.deily, pbloom, ronaldoussoren
priority: normal
severity: normal
status: open
title: On Osx Monterey(12.x), Logging.handlers.SysLogHandler does not work
versions: Python 3.10, Python 3.7, Python 3.8, Python 3.9

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