You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
121 lines
4.5 KiB
121 lines
4.5 KiB
4 months ago
|
:mod:`syslog` --- Unix syslog library routines
|
||
|
|
==============================================
|
||
|
|
|
||
|
|
.. module:: syslog
|
||
|
|
:platform: Unix
|
||
|
|
:synopsis: An interface to the Unix syslog library routines.
|
||
|
|
|
||
|
|
--------------
|
||
|
|
|
||
|
|
This module provides an interface to the Unix ``syslog`` library routines.
|
||
|
|
Refer to the Unix manual pages for a detailed description of the ``syslog``
|
||
|
|
facility.
|
||
|
|
|
||
|
|
This module wraps the system ``syslog`` family of routines. A pure Python
|
||
|
|
library that can speak to a syslog server is available in the
|
||
|
|
:mod:`logging.handlers` module as :class:`SysLogHandler`.
|
||
|
|
|
||
|
|
The module defines the following functions:
|
||
|
|
|
||
|
|
|
||
|
|
.. function:: syslog(message)
|
||
|
|
syslog(priority, message)
|
||
|
|
|
||
|
|
Send the string *message* to the system logger. A trailing newline is added
|
||
|
|
if necessary. Each message is tagged with a priority composed of a
|
||
|
|
*facility* and a *level*. The optional *priority* argument, which defaults
|
||
|
|
to :const:`LOG_INFO`, determines the message priority. If the facility is
|
||
|
|
not encoded in *priority* using logical-or (``LOG_INFO | LOG_USER``), the
|
||
|
|
value given in the :func:`openlog` call is used.
|
||
|
|
|
||
|
|
If :func:`openlog` has not been called prior to the call to :func:`syslog`,
|
||
|
|
``openlog()`` will be called with no arguments.
|
||
|
|
|
||
|
|
.. audit-event:: syslog.syslog priority,message syslog.syslog
|
||
|
|
|
||
|
|
|
||
|
|
.. function:: openlog([ident[, logoption[, facility]]])
|
||
|
|
|
||
|
|
Logging options of subsequent :func:`syslog` calls can be set by calling
|
||
|
|
:func:`openlog`. :func:`syslog` will call :func:`openlog` with no arguments
|
||
|
|
if the log is not currently open.
|
||
|
|
|
||
|
|
The optional *ident* keyword argument is a string which is prepended to every
|
||
|
|
message, and defaults to ``sys.argv[0]`` with leading path components
|
||
|
|
stripped. The optional *logoption* keyword argument (default is 0) is a bit
|
||
|
|
field -- see below for possible values to combine. The optional *facility*
|
||
|
|
keyword argument (default is :const:`LOG_USER`) sets the default facility for
|
||
|
|
messages which do not have a facility explicitly encoded.
|
||
|
|
|
||
|
|
.. audit-event:: syslog.openlog ident,logoption,facility syslog.openlog
|
||
|
|
|
||
|
|
.. versionchanged:: 3.2
|
||
|
|
In previous versions, keyword arguments were not allowed, and *ident* was
|
||
|
|
required. The default for *ident* was dependent on the system libraries,
|
||
|
|
and often was ``python`` instead of the name of the Python program file.
|
||
|
|
|
||
|
|
|
||
|
|
.. function:: closelog()
|
||
|
|
|
||
|
|
Reset the syslog module values and call the system library ``closelog()``.
|
||
|
|
|
||
|
|
This causes the module to behave as it does when initially imported. For
|
||
|
|
example, :func:`openlog` will be called on the first :func:`syslog` call (if
|
||
|
|
:func:`openlog` hasn't already been called), and *ident* and other
|
||
|
|
:func:`openlog` parameters are reset to defaults.
|
||
|
|
|
||
|
|
.. audit-event:: syslog.closelog "" syslog.closelog
|
||
|
|
|
||
|
|
|
||
|
|
.. function:: setlogmask(maskpri)
|
||
|
|
|
||
|
|
Set the priority mask to *maskpri* and return the previous mask value. Calls
|
||
|
|
to :func:`syslog` with a priority level not set in *maskpri* are ignored.
|
||
|
|
The default is to log all priorities. The function ``LOG_MASK(pri)``
|
||
|
|
calculates the mask for the individual priority *pri*. The function
|
||
|
|
``LOG_UPTO(pri)`` calculates the mask for all priorities up to and including
|
||
|
|
*pri*.
|
||
|
|
|
||
|
|
.. audit-event:: syslog.setlogmask maskpri syslog.setlogmask
|
||
|
|
|
||
|
|
The module defines the following constants:
|
||
|
|
|
||
|
|
Priority levels (high to low):
|
||
|
|
:const:`LOG_EMERG`, :const:`LOG_ALERT`, :const:`LOG_CRIT`, :const:`LOG_ERR`,
|
||
|
|
:const:`LOG_WARNING`, :const:`LOG_NOTICE`, :const:`LOG_INFO`,
|
||
|
|
:const:`LOG_DEBUG`.
|
||
|
|
|
||
|
|
Facilities:
|
||
|
|
:const:`LOG_KERN`, :const:`LOG_USER`, :const:`LOG_MAIL`, :const:`LOG_DAEMON`,
|
||
|
|
:const:`LOG_AUTH`, :const:`LOG_LPR`, :const:`LOG_NEWS`, :const:`LOG_UUCP`,
|
||
|
|
:const:`LOG_CRON`, :const:`LOG_SYSLOG`, :const:`LOG_LOCAL0` to
|
||
|
|
:const:`LOG_LOCAL7`, and, if defined in ``<syslog.h>``,
|
||
|
|
:const:`LOG_AUTHPRIV`.
|
||
|
|
|
||
|
|
Log options:
|
||
|
|
:const:`LOG_PID`, :const:`LOG_CONS`, :const:`LOG_NDELAY`, and, if defined
|
||
|
|
in ``<syslog.h>``, :const:`LOG_ODELAY`, :const:`LOG_NOWAIT`, and
|
||
|
|
:const:`LOG_PERROR`.
|
||
|
|
|
||
|
|
|
||
|
|
Examples
|
||
|
|
--------
|
||
|
|
|
||
|
|
Simple example
|
||
|
|
~~~~~~~~~~~~~~
|
||
|
|
|
||
|
|
A simple set of examples::
|
||
|
|
|
||
|
|
import syslog
|
||
|
|
|
||
|
|
syslog.syslog('Processing started')
|
||
|
|
if error:
|
||
|
|
syslog.syslog(syslog.LOG_ERR, 'Processing started')
|
||
|
|
|
||
|
|
An example of setting some log options, these would include the process ID in
|
||
|
|
logged messages, and write the messages to the destination facility used for
|
||
|
|
mail logging::
|
||
|
|
|
||
|
|
syslog.openlog(logoption=syslog.LOG_PID, facility=syslog.LOG_MAIL)
|
||
|
|
syslog.syslog('E-mail processing initiated...')
|