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.\" Copyright (c) 1983, 1990, 1993
.\" 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.
.\"
.\" @(#)logger.1 8.1 (Berkeley) 6/6/93
.\"
.\" Section on valid facility and level strings added by
.\" and1000@debian.org, 26 Oct 1997.
.Dd June 6, 1993
.Dt LOGGER 1
.Os BSD 4.3
.Sh NAME
.Nm logger
.Nd a shell command interface to the syslog(3) system log module
.Sh SYNOPSIS
.Nm logger
.Op Fl isd
.Op Fl f Ar file
.Op Fl p Ar pri
.Op Fl t Ar tag
.Op Fl u Ar socket
.Op Ar message ...
.Sh DESCRIPTION
.Nm Logger
makes entries in the system log.
It provides a shell command interface to the
.Xr syslog 3
system log module.
.Pp
Options:
.Pp
.Bl -tag -width "message"
.It Fl i
Log the process id of the logger process
with each line.
.It Fl s
Log the message to standard error, as well as the system log.
.It Fl f Ar file
Log the specified file.
.It Fl p Ar pri
Enter the message with the specified priority.
The priority may be specified numerically or as a ``facility.level''
pair.
For example, ``\-p local3.info'' logs the message(s) as
.Ar info Ns rmational
level in the
.Ar local3
facility.
The default is ``user.notice.''
.It Fl t Ar tag
Mark every line in the log with the specified
.Ar tag .
.It Fl u Ar sock
Write to socket as specified with
.Ar socket
instead of builtin syslog routines.
.It Fl d
Use a datagram instead of a stream connection to this socket.
.It --
End the argument list. This is to allow the
.Ar message
to start with a hyphen (\-).
.It Ar message
Write the message to log; if not specified, and the
.Fl f
flag is not
provided, standard input is logged.
.El
.Pp
The
.Nm logger
utility exits 0 on success, and >0 if an error occurs.
.Pp
Valid facility names are: auth, authpriv (for security information of a
sensitive nature), cron, daemon, ftp, kern (can’t be generated from user
process), lpr, mail, news, security (deprecated synonym for auth), syslog,
user, uucp, and local0 to local7, inclusive.
.Pp
Valid level names are):
alert, crit, debug, emerg, err, error (deprecated synonym for err),
info, notice, panic (deprecated synonym for emerg), warning,
warn (deprecated synonym for warning).
For the priority order and intended purposes of these levels, see
.Xr syslog 3 .
.Sh EXAMPLES
.Bd -literal -offset indent -compact
logger System rebooted
logger \-p local0.notice \-t HOSTIDM \-f /dev/idmc
.Ed
.Sh SEE ALSO
.Xr syslog 3 ,
.Xr syslogd 8
.Sh STANDARDS
The
.Nm logger
command is expected to be
.St -p1003.2
compatible.
.Sh AVAILABILITY
The logger command is part of the util-linux package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
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