1.\" Copyright (c) 1983, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)logger.1 8.1 (Berkeley) 6/6/93 29.\" $FreeBSD$ 30.\" 31.Dd March 16, 2022 32.Dt LOGGER 1 33.Os 34.Sh NAME 35.Nm logger 36.Nd make entries in the system log 37.Sh SYNOPSIS 38.Nm 39.Op Fl 46Ais 40.Op Fl f Ar file 41.Op Fl H Ar hostname 42.Op Fl h Ar host 43.Op Fl P Ar port 44.Op Fl p Ar pri 45.Op Fl S Ar addr Ns \&: Ns Ar port 46.Op Fl t Ar tag 47.Op Ar message ... 48.Sh DESCRIPTION 49The 50.Nm 51utility provides a shell command interface to the 52.Xr syslog 3 53system log module. 54.Pp 55The following options are available: 56.Bl -tag -width indent 57.It Fl 4 58Force 59.Nm 60to use IPv4 addresses only. 61.It Fl 6 62Force 63.Nm 64to use IPv6 addresses only. 65.It Fl A 66By default, 67.Nm 68tries to send the message to only one address, 69even if the host has more than one A or AAAA record. 70If this option is specified, 71.Nm 72tries to send the message to all addresses. 73.It Fl i 74Log the process id of the logger process 75with each line. 76This flag is ignored and the process id is always logged. 77.It Fl s 78Log the message to standard error, as well as the system log. 79.It Fl f Ar file 80Read the contents of the specified file into syslog. 81This option is ignored when a message is also specified. 82.It Fl H Ar hostname 83Set the hostname in the header of the message to specified value. 84If not specified, host part of 85.Xr gethostname 3 86will be used. 87.It Fl h Ar host 88Send the message to the remote system 89.Ar host 90instead of logging it locally. 91Note that 92.Nm 93currently supports 94.Li AF_INET 95.Pq IPv4 , 96.Li AF_INET6 97.Pq IPv6 , 98and 99.Li AF_LOCAL 100.Pq Unix-domain socket 101address families. 102The following address formats are valid in 103.Ar host : 104.Pp 105.Bl -tag -width "AF_LOCAL" -compact 106.It Li AF_INET 107192.168.2.1 108.It Li AF_INET6 1092001:db8::1 110.It Li AF_LOCAL 111.Pa /var/run/log 112.El 113.It Fl P Ar port 114Send the message to the specified 115.Ar port 116number on a remote system, 117which can be specified as a service name 118or as a decimal number. 119The default is 120.Dq Li syslog . 121If an unknown service name is used, 122.Nm 123prints a warning and falls back to port 514. 124.It Fl p Ar pri 125Enter the message with the specified priority. 126The priority may be specified numerically or as a 127.Li facility.level 128pair. 129For example, 130.Dq Fl p Li local3.info 131logs the message(s) as 132.Ar info Ns rmational 133level in the 134.Ar local3 135facility. 136The default is 137.Dq Li user.notice . 138.It Fl S Ar addr Ns \&: Ns Ar port 139Specify source address and/or source port when using 140.Fl h 141option. 142The same address will be used for all of the remote addresses 143when 144.Fl A 145flag is enabled. 146Note that a numeric IPv6 address in 147.Ar addr 148must be enclosed with 149.Dq \&[ 150and 151.Dq \&] . 152.It Fl t Ar tag 153Mark every line in the log with the specified 154.Ar tag 155rather than the default of current login name. 156.It Ar message 157Write the message to log; if not specified, and the 158.Fl f 159flag is not 160provided, standard input is logged. 161.El 162.Sh EXIT STATUS 163.Ex -std 164.Sh EXAMPLES 165.Bd -literal -offset indent -compact 166logger System rebooted 167 168logger \-p local0.notice \-t HOSTIDM \-f /dev/idmc 169.Ed 170.Sh SEE ALSO 171.Xr syslog 3 , 172.Xr syslogd 8 173.Sh STANDARDS 174The 175.Nm 176command is expected to be 177.St -p1003.2 178compatible. 179