NetBSD/usr.sbin/syslogd/syslog.conf.5

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.\" $NetBSD: syslog.conf.5,v 1.11 2003/08/07 11:25:44 agc Exp $
.\"
.\" Copyright (c) 1990, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" from: @(#)syslog.conf.5 8.1 (Berkeley) 6/9/93
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.\"
.Dd June 9, 1993
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.Dt SYSLOG.CONF 5
.Os
.Sh NAME
.Nm syslog.conf
.Nd
.Xr syslogd 8
configuration file
.Sh DESCRIPTION
The
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.Nm
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file is the configuration file for the
.Xr syslogd 8
program.
It consists of lines with two fields: the
.Em selector
field which specifies the types of messages and priorities to which the
line applies, and an
.Em action
field which specifies the action to be taken if a message
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.Xr syslogd 8
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receives matches the selection criteria.
The
.Em selector
field is separated from the
.Em action
field by one or more tab characters.
.Pp
The
.Em Selectors
function
are encoded as a
.Em facility ,
a period
.Pq Sq \&. ,
and a
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.Em level ,
with no intervening white-space.
Both the
.Em facility
and the
.Em level
are case insensitive.
.Pp
The
.Em facility
describes the part of the system generating the message, and is one of
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the following keywords: auth, authpriv, cron, ftp, daemon, kern, lpr,
mail, mark, news, syslog, user, uucp and local0 through local7.
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These keywords (with the exception of mark) correspond to the
similar
.Dq Dv LOG_
values specified to the
.Xr openlog 3
and
.Xr syslog 3
library routines.
.Pp
The
.Em level
describes the severity of the message, and is a keyword from the
following ordered list (higher to lower): emerg, alert, crit, err,
warning, notice, info and debug.
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These keywords correspond to the
similar
.Pq Dv LOG_
values specified to the
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.Xr syslog 3
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library routine.
.Pp
See
.Xr syslog 3
for a further descriptions of both the
.Em facility
and
.Em level
keywords and their significance.
.Pp
If a received message matches the specified
.Em facility
and is of the specified
.Em level
.Em (or a higher level) ,
the action specified in the
.Em action
field will be taken.
.Pp
Multiple
.Em selectors
may be specified for a single
.Em action
by separating them with semicolon
.Pq Sq \&;
characters.
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It is important to note, however, that each
.Em selector
can modify the ones preceding it.
.Pp
Multiple
.Em facilities
may be specified for a single
.Em level
by separating them with comma
.Pq Sq \&,
characters.
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.Pp
An asterisk
.Pq Sq \&*
can be used to specify all
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.Em facilities
or all
.Em levels .
.Pp
The special
.Em facility
.Dq mark
receives a message at priority
.Dq info
every 20 minutes
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(see
.Xr syslogd 8 ) .
This is not enabled by a
.Em facility
field containing an asterisk.
.Pp
The special
.Em level
.Dq none
disables a particular
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.Em facility .
.Pp
The
.Em action
field of each line specifies the action to be taken when the
.Em selector
field selects a message.
There are four forms:
.Bl -bullet
.It
A pathname (beginning with a leading slash).
Selected messages are appended to the file.
.It
A hostname (preceded by an at
.Pq Sq @
sign).
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Selected messages are forwarded to the
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.Xr syslogd 8
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program on the named host.
.It
A comma separated list of users.
Selected messages are written to those users
if they are logged in.
.It
An asterisk.
Selected messages are written to all logged-in users.
.El
.Pp
Blank lines and lines whose first non-blank character is a hash
.Pq Sq #
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character are ignored.
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.Sh FILES
.Bl -tag -width /etc/syslog.conf -compact
.It Pa /etc/syslog.conf
The
.Xr syslogd 8
configuration file.
.El
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.Sh EXAMPLES
A configuration file might appear as follows:
.Bd -literal
# Log all kernel messages, authentication messages of
# level notice or higher and anything of level err or
# higher to the console.
# Don't log private authentication messages!
*.err;kern.*;auth.notice;authpriv.none /dev/console
# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
*.info;mail.none;authpriv.none /var/log/messages
# The authpriv file has restricted access.
authpriv.* /var/log/secure
# Log all the mail messages in one place.
mail.* /var/log/maillog
# Everybody gets emergency messages, plus log them on another
# machine.
*.emerg *
*.emerg @arpa.berkeley.edu
# Root and Eric get alert and higher messages.
*.alert root,eric
# Save mail and news errors of level err and higher in a
# special file.
mail,news.err /var/log/spoolerr
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.Ed
.Sh SEE ALSO
.Xr syslog 3 ,
.Xr syslogd 8
.Sh HISTORY
The
.Nm
file appeared in
.Bx 4.3 ,
along with
.Xr syslogd 8 .
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.Sh BUGS
The effects of multiple selectors are sometimes not intuitive.
For example
.Dq mail.crit;*.err
will select
.Dq mail
facility messages at
the level of
.Dq err
or higher, not at the level of
.Dq crit
or higher.