Imported from util-linux-2.5 tarball.

[thirdparty/util-linux.git] / syslogd / syslog.conf.5

.\" Copyright (c) 1990, 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"     @(#)syslog.conf.5	5.3 (Berkeley) 5/10/91
.\"
.Dd May 10, 1991
.Dt SYSLOG.CONF 5
.Os
.Sh NAME
.Nm syslog.conf
.Nd
.Xr syslogd 8
configuration file
.Sh DESCRIPTION
The
.Nm syslog.conf
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
.Xr syslogd
received matches the selection criteria.  There may not be
.Em any
spaces in the action field.
The
.Em selector
field is separated from the
.Em action
field by one or more tab or space characters (this is a departure from the
standard BSD way of doing things: both tabs
.Em and
spaces may be used to separate the selector from the action).
.Pp
The
.Em Selector
functions
are encoded as a
.Em facility ,
a period (``.''), and a
.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
the following keywords: auth, authpriv, cron, daemon, kern, lpr, mail,
mark, news, syslog, user, uucp and local0 through local7.
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, optionally
preceded by an equals (``=''), from the following ordered list
(higher to lower): emerg, alert, crit, err, warning, notice, info,
and debug.
These keywords correspond to the
similar
.Pq Dv LOG_
values specified to the
.Xr syslog
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 if
.Em level
was specified without ``='') ,
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 (``;'') characters.
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 (``,'') characters.
.Pp
An asterisk (``*'') can be used to specify all
.Em facilities
or all
.Em levels .
.Pp
The special
.Em facility
``mark'' receives a message at priority ``info'' every 20 minutes
(see
.Xr syslogd 8 ) .
This is not enabled by a
.Em facility
field containing an asterisk.
.Pp
The special
.Em level
``none'' disables a particular
.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 (``@'') sign).
Selected messages are forwarded to the
.Xr syslogd
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 (``#'')
character are ignored.
.Sh EXAMPLES
.Pp
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

# Log debug messages only
*.=debug                                              /var/log/debug

# 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.
uucp,news.crit						/var/log/spoolerr
.Ed
.Sh FILES
.Bl -tag -width /etc/syslog.conf -compact
.It Pa /etc/syslog.conf
The
.Xr syslogd 8
configuration file.
.El
.Sh BUGS
The effects of multiple selectors are sometimes not intuitive.
For example ``mail.crit,*.err'' will select ``mail'' facility messages at
the level of ``err'' or higher, not at the level of ``crit'' or higher.
.Sh SEE ALSO
.Xr syslog 3 ,
.Xr syslogd 8
.Sh HISTORY
The
.Nm syslog.conf
file format is
.Ud .