.\" Copyright (c) 1983, 1990, 1993
.\" The Regents of the University of California. All rights reserved.
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.\" modification, are permitted provided that the following conditions
.\" are met:
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.\" 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.
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.\" @(#)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 Fl n Ar server
.Op Fl P Ar udpport
.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, Fl Fl id
Log the process id of the logger process
with each line.
.It Fl s, Fl Fl stderr
Log the message to standard error, as well as the system log.
.It Fl f, Fl Fl file Ar file
Log contents of the specified file. This option cannot be
combined with command line message.
.It Fl p, Fl Fl priority 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, Fl Fl tag Ar tag
Mark every line in the log with the specified
.Ar tag .
.It Fl u, Fl Fl socket Ar sock
Write to socket as specified with
.Ar socket
instead of builtin syslog routines.
.It Fl d, Fl Fl udp
Use a datagram instead of a stream connection to this socket.
.It Fl n, Fl Fl server Ar serv
Write to remote syslog server using UDP as specified with
.Ar server
instead of builtin syslog routines.
.It Fl P, Fl Fl port Ar port
Change UDP port to the value as specified with
.Ar udpport .
Default port number is 514.
.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
logger \-n loghost.example.com System rebooted
.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/.
