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Syslogd configures when it starts up and whenever it receives a hangup signal. Lines in the configuration file have a selector to determine the message priorities to which the line applies and an action. The action field are separated from the selector by one or more tabs.
Selectors are semicolon separated lists of priority specifiers. Each priority has a facility describing the part of the system that generated the message, a dot, and a level indicating the severity of the message. Symbolic names may be used. An asterisk selects all facilities. All messages of the specified level or higher (greater severity) are selected. More than one facility may be selected using commas to separate them. For example:
*.emerg;mail,daemon.crit
Selects all facilities at the emerg level and the mail and daemon facilities at the crit level.
Known facilities and levels recognized by syslogd are those listed in syslog.3 without the leading ``LOG_''. The additional facility ``mark'' has a message at priority LOG_INFO sent to it every 20 minutes (this may be changed with the -m flag). The ``mark'' facility is not enabled by a facility field containing an asterisk. The level ``none'' may be used to disable a particular facility. For example,
*.debug;mail.none
Sends all messages except mail messages to the selected file.
The second part of each line describes where the message is to be logged if this line is selected. There are four forms:
Blank lines and lines beginning with `#' are ignored.
For example, the configuration file:
kern,mark.debug /dev/console *.notice;mail.info /usr/spool/adm/syslog *.crit /usr/adm/critical kern.err @ucbarpa *.emerg * *.alert eric,kridle *.alert;auth.warning ralph
logs all kernel messages and 20 minute marks onto the system console, all notice (or higher) level messages and all mail system messages except debug messages into the file /usr/spool/adm/syslog, and all critical messages into /usr/adm/critical; kernel messages of error severity or higher are forwarded to ucbarpa. All users will be informed of any emergency messages, the users ``eric'' and ``kridle'' will be informed of any alert messages, and the user ``ralph'' will be informed of any alert message, or any warning message (or higher) from the authorization system.
The flags are:
Syslogd creates the file /etc/syslog.pid, if possible, containing a single line with its process id. This can be used to kill or reconfigure syslogd.
To bring syslogd down, it should be sent a terminate signal (e.g. kill `cat /etc/syslog.pid`).
/etc/syslog.conf the configuration file /etc/syslog.pid the process id /dev/log Name of the UNIX domain datagram log socket /dev/klog The kernel log device
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Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97