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.\" 30.Dd July 3, 2023 31.Dt LOGGER 1 32.Os 33.Sh NAME 34.Nm logger 35.Nd make entries in the system log 36.Sh SYNOPSIS 37.Nm 38.Op Fl 46Ais 39.Op Fl f Ar file 40.Op Fl H Ar hostname 41.Op Fl h Ar host 42.Op Fl P Ar port 43.Op Fl p Ar pri 44.Op Fl S Ar addr Ns \&: Ns Ar port 45.Op Fl t Ar tag 46.Op Ar message ... 47.Sh DESCRIPTION 48The 49.Nm 50utility provides a shell command interface to the 51.Xr syslog 3 52system log module. 53.Pp 54The following options are available: 55.Bl -tag -width indent 56.It Fl 4 57Force 58.Nm 59to use IPv4 addresses only. 60.It Fl 6 61Force 62.Nm 63to use IPv6 addresses only. 64.It Fl A 65By default, 66.Nm 67tries to send the message to only one address, 68even if the host has more than one A or AAAA record. 69If this option is specified, 70.Nm 71tries to send the message to all addresses. 72.It Fl i 73Log the process id of the logger process 74with each line. 75This flag is ignored and the process id is always logged. 76See also 77.Fl t . 78.It Fl s 79Log the message to standard error, as well as the system log. 80.It Fl f Ar file 81Read the contents of the specified file into syslog. 82This option is ignored when a message is also specified. 83.It Fl H Ar hostname 84Set the hostname in the header of the message to specified value. 85If not specified, host part of 86.Xr gethostname 3 87will be used. 88.It Fl h Ar host 89Send the message to the remote system 90.Ar host 91instead of logging it locally. 92Note that 93.Nm 94currently supports 95.Li AF_INET 96.Pq IPv4 , 97.Li AF_INET6 98.Pq IPv6 , 99and 100.Li AF_LOCAL 101.Pq Unix-domain socket 102address families. 103The following address formats are valid in 104.Ar host : 105.Pp 106.Bl -tag -width "AF_LOCAL" -compact 107.It Li AF_INET 108192.168.2.1 109.It Li AF_INET6 1102001:db8::1 111.It Li AF_LOCAL 112.Pa /var/run/log 113.El 114.It Fl P Ar port 115Send the message to the specified 116.Ar port 117number on a remote system, 118which can be specified as a service name 119or as a decimal number. 120The default is 121.Dq Li syslog . 122If an unknown service name is used, 123.Nm 124prints a warning and falls back to port 514. 125.It Fl p Ar pri 126Enter the message with the specified priority. 127The priority may be specified numerically or as a 128.Li facility.level 129pair. 130For example, 131.Dq Fl p Li local3.info 132logs the message(s) as 133.Ar info Ns rmational 134level in the 135.Ar local3 136facility. 137The default is 138.Dq Li user.notice . 139.It Fl S Ar addr Ns \&: Ns Ar port 140Specify source address and/or source port when using 141.Fl h 142option. 143The same address will be used for all of the remote addresses 144when 145.Fl A 146flag is enabled. 147Note that a numeric IPv6 address in 148.Ar addr 149must be enclosed with 150.Dq \&[ 151and 152.Dq \&] . 153.It Fl t Ar tag 154Mark every line in the log with the specified 155.Ar tag 156rather than the default of current login name. 157Use 158.Fl t Ar tag[N] 159to insert specific decimal process id instead of id of 160.Nm . 161.It Ar message 162Write the message to log; if not specified, and the 163.Fl f 164flag is not 165provided, standard input is logged. 166.El 167.Sh EXIT STATUS 168.Ex -std 169.Sh EXAMPLES 170.Bd -literal -offset indent -compact 171logger System rebooted 172 173logger \-p local0.notice \-t HOSTIDM \-f /dev/idmc 174.Ed 175.Sh SEE ALSO 176.Xr syslog 3 , 177.Xr syslogd 8 178.Sh STANDARDS 179The 180.Nm 181command is expected to be 182.St -p1003.2 183compatible. 184