256 lines
7.0 KiB
Groff
256 lines
7.0 KiB
Groff
.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. 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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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)syslog.conf.5 8.1 (Berkeley) 6/9/93
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.\"
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.Dd June 9, 1993
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.Dt SYSLOG.CONF 5
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.Os
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.Sh NAME
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.Nm syslog.conf
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.Nd
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.Xr syslogd 8
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configuration file
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.Sh DESCRIPTION
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The
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.Nm syslog.conf
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file is the configuration file for the
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.Xr syslogd 8
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program.
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It consists of
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blocks of lines separated by
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.Em program
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specifications,
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with each line containing two fields: the
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.Em selector
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field which specifies the types of messages and priorities to which the
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line applies, and an
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.Em action
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field which specifies the action to be taken if a message
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.Xr syslogd
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receives matches the selection criteria.
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The
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.Em selector
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field is separated from the
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.Em action
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field by one or more tab characters.
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.Pp
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The
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.Em Selectors
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function
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are encoded as a
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.Em facility ,
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a period (``.''), and a
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.Em level ,
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with no intervening white-space.
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Both the
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.Em facility
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and the
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.Em level
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are case insensitive.
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.Pp
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The
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.Em facility
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describes the part of the system generating the message, and is one of
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the following keywords: auth, authpriv, cron, daemon, kern, lpr, mail,
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mark, news, syslog, user, uucp and local0 through local7.
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These keywords (with the exception of mark) correspond to the
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similar
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.Dq Dv LOG_
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values specified to the
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.Xr openlog 3
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and
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.Xr syslog 3
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library routines.
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.Pp
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The
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.Em level
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describes the severity of the message, and is a keyword from the
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following ordered list (higher to lower): emerg, alert, crit, err,
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warning, notice, info and debug.
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These keywords correspond to the
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similar
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.Pq Dv LOG_
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values specified to the
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.Xr syslog
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library routine.
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.Pp
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Each block of lines is separated from the previous block by a tag. The tag
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is a line beginning with
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.Em #!prog
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or
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.Em !prog
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(the former is for compatibility with the previous syslogd, if one is sharing
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syslog.conf files, for example)
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and each block will be associated with calls to syslog from that specific
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program.
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.Pp
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See
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.Xr syslog 3
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for a further descriptions of both the
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.Em facility
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and
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.Em level
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keywords and their significance. It's preferred that selections be made on
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.Em facility
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rather than
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.Em program ,
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since the latter can easily vary in a networked environment. In some cases,
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though, an appropriate
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.Em facility
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simply doesn't exist (for example,
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.Em ftpd
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logs under LOG_DAEMON along with a myriad other programs).
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.Pp
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If a received message matches the specified
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.Em facility
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and is of the specified
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.Em level
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.Em (or a higher level) ,
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and the first word in the message after the date matches the
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.Em program ,
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the action specified in the
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.Em action
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field will be taken.
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.Pp
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Multiple
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.Em selectors
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may be specified for a single
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.Em action
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by separating them with semicolon (``;'') characters.
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It is important to note, however, that each
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.Em selector
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can modify the ones preceding it.
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.Pp
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Multiple
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.Em facilities
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may be specified for a single
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.Em level
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by separating them with comma (``,'') characters.
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.Pp
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An asterisk (``*'') can be used to specify all
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.Em facilities
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all
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.Em levels
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or all
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.Em programs .
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.Pp
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The special
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.Em facility
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``mark'' receives a message at priority ``info'' every 20 minutes
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(see
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.Xr syslogd 8 ) .
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This is not enabled by a
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.Em facility
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field containing an asterisk.
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.Pp
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The special
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.Em level
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``none'' disables a particular
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.Em facility .
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.Pp
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The
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.Em action
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field of each line specifies the action to be taken when the
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.Em selector
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field selects a message.
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There are four forms:
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.Bl -bullet
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.It
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A pathname (beginning with a leading slash).
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Selected messages are appended to the file.
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.It
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A hostname (preceded by an at (``@'') sign).
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Selected messages are forwarded to the
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.Xr syslogd
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program on the named host.
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.It
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A comma separated list of users.
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Selected messages are written to those users
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if they are logged in.
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.It
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An asterisk.
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Selected messages are written to all logged-in users.
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.El
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.Pp
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Blank lines and lines whose first non-blank character is a hash (``#'')
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character are ignored.
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.Sh EXAMPLES
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.Pp
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A configuration file might appear as follows:
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.Bd -literal
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# Log all kernel messages, authentication messages of
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# level notice or higher and anything of level err or
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# higher to the console.
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# Don't log private authentication messages!
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*.err;kern.*;auth.notice;authpriv.none /dev/console
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# Log anything (except mail) of level info or higher.
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# Don't log private authentication messages!
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*.info;mail.none;authpriv.none /var/log/messages
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# The authpriv file has restricted access.
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authpriv.* /var/log/secure
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# Log all the mail messages in one place.
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mail.* /var/log/maillog
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# Everybody gets emergency messages, plus log them on another
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# machine.
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*.emerg *
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*.emerg @arpa.berkeley.edu
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# Root and Eric get alert and higher messages.
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*.alert root,eric
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# Save mail and news errors of level err and higher in a
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# special file.
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uucp,news.crit /var/log/spoolerr
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# Save ftpd transactions along with mail and news
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!ftpd
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*.* /var/log/spoolerr
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.Ed
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.Sh FILES
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.Bl -tag -width /etc/syslog.conf -compact
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.It Pa /etc/syslog.conf
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The
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.Xr syslogd 8
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configuration file.
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.El
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.Sh BUGS
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The effects of multiple selectors are sometimes not intuitive.
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For example ``mail.crit,*.err'' will select ``mail'' facility messages at
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the level of ``err'' or higher, not at the level of ``crit'' or higher.
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.Sh SEE ALSO
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.Xr syslog 3 ,
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.Xr syslogd 8
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