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journald-python
===============
Python module for native access to the journald facilities in recent
versions of systemd. In particular, this capability includes passing
key/value pairs as fields that journald can use for filtering.
Installation
============
On Fedora 17+:
sudo yum install git python-pip gcc python-devel systemd-devel
pip-python install git+http://github.com/davidstrauss/journald-python.git#egg=journald
Usage
=====
Quick example:
import journald
journald.send('Hello world')
journald.send('Hello, again, world', FIELD2='Greetings!', FIELD3='Guten tag')
journald.send('Binary message', BINARY=b'\xde\xad\xbe\xef')
There is one required argument -- the message, and additional fields
can be specified as keyword arguments. Following the journald API, all
names are uppercase.
The journald sendv call can also be accessed directly:
import journald
journald.sendv('MESSAGE=Hello world')
journald.sendv('MESSAGE=Hello, again, world', 'FIELD2=Greetings!',
'FIELD3=Guten tag')
journald.sendv('MESSAGE=Binary message', b'BINARY=\xde\xad\xbe\xef')
The two examples should give the same results in the log.
Notes:
* Unlike the native C version of journald's sd_journal_send(),
printf-style substitution is not supported. Perform any
substitution using Python's % operator or .format() capabilities
first.
* The base message is usually sent in the form MESSAGE=hello. The
MESSAGE field is, however, not required.
* A ValueError is thrown is thrown if sd_journald_sendv() results in
an error. This might happen if there are no arguments or one of them
is invalid.
Viewing Output
==============
Quick way to view output with all fields as it comes in:
sudo journalctl -f --output=json
Test Builds (for Development)
=============================
python setup.py build
cd builds/lib.*
python
>>> import journald
>>> journald.send("Test")
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