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 July 3, 2023 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. 77See also 78.Fl t . 79.It Fl s 80Log the message to standard error, as well as the system log. 81.It Fl f Ar file 82Read the contents of the specified file into syslog. 83This option is ignored when a message is also specified. 84.It Fl H Ar hostname 85Set the hostname in the header of the message to specified value. 86If not specified, host part of 87.Xr gethostname 3 88will be used. 89.It Fl h Ar host 90Send the message to the remote system 91.Ar host 92instead of logging it locally. 93Note that 94.Nm 95currently supports 96.Li AF_INET 97.Pq IPv4 , 98.Li AF_INET6 99.Pq IPv6 , 100and 101.Li AF_LOCAL 102.Pq Unix-domain socket 103address families. 104The following address formats are valid in 105.Ar host : 106.Pp 107.Bl -tag -width "AF_LOCAL" -compact 108.It Li AF_INET 109192.168.2.1 110.It Li AF_INET6 1112001:db8::1 112.It Li AF_LOCAL 113.Pa /var/run/log 114.El 115.It Fl P Ar port 116Send the message to the specified 117.Ar port 118number on a remote system, 119which can be specified as a service name 120or as a decimal number. 121The default is 122.Dq Li syslog . 123If an unknown service name is used, 124.Nm 125prints a warning and falls back to port 514. 126.It Fl p Ar pri 127Enter the message with the specified priority. 128The priority may be specified numerically or as a 129.Li facility.level 130pair. 131For example, 132.Dq Fl p Li local3.info 133logs the message(s) as 134.Ar info Ns rmational 135level in the 136.Ar local3 137facility. 138The default is 139.Dq Li user.notice . 140.It Fl S Ar addr Ns \&: Ns Ar port 141Specify source address and/or source port when using 142.Fl h 143option. 144The same address will be used for all of the remote addresses 145when 146.Fl A 147flag is enabled. 148Note that a numeric IPv6 address in 149.Ar addr 150must be enclosed with 151.Dq \&[ 152and 153.Dq \&] . 154.It Fl t Ar tag 155Mark every line in the log with the specified 156.Ar tag 157rather than the default of current login name. 158Use 159.Fl t Ar tag[N] 160to insert specific decimal process id instead of id of 161.Nm . 162.It Ar message 163Write the message to log; if not specified, and the 164.Fl f 165flag is not 166provided, standard input is logged. 167.El 168.Sh EXIT STATUS 169.Ex -std 170.Sh EXAMPLES 171.Bd -literal -offset indent -compact 172logger System rebooted 173 174logger \-p local0.notice \-t HOSTIDM \-f /dev/idmc 175.Ed 176.Sh SEE ALSO 177.Xr syslog 3 , 178.Xr syslogd 8 179.Sh STANDARDS 180The 181.Nm 182command is expected to be 183.St -p1003.2 184compatible. 185