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.Dd July 3, 2023 29.Dt LOGGER 1 30.Os 31.Sh NAME 32.Nm logger 33.Nd make entries in the system log 34.Sh SYNOPSIS 35.Nm 36.Op Fl 46Ais 37.Op Fl f Ar file 38.Op Fl H Ar hostname 39.Op Fl h Ar host 40.Op Fl P Ar port 41.Op Fl p Ar pri 42.Op Fl S Ar addr Ns \&: Ns Ar port 43.Op Fl t Ar tag 44.Op Ar message ... 45.Sh DESCRIPTION 46The 47.Nm 48utility provides a shell command interface to the 49.Xr syslog 3 50system log module. 51.Pp 52The following options are available: 53.Bl -tag -width indent 54.It Fl 4 55Force 56.Nm 57to use IPv4 addresses only. 58.It Fl 6 59Force 60.Nm 61to use IPv6 addresses only. 62.It Fl A 63By default, 64.Nm 65tries to send the message to only one address, 66even if the host has more than one A or AAAA record. 67If this option is specified, 68.Nm 69tries to send the message to all addresses. 70.It Fl i 71Log the process id of the logger process 72with each line. 73This flag is ignored and the process id is always logged. 74See also 75.Fl t . 76.It Fl s 77Log the message to standard error, as well as the system log. 78.It Fl f Ar file 79Read the contents of the specified file into syslog. 80This option is ignored when a message is also specified. 81.It Fl H Ar hostname 82Set the hostname in the header of the message to specified value. 83If not specified, host part of 84.Xr gethostname 3 85will be used. 86.It Fl h Ar host 87Send the message to the remote system 88.Ar host 89instead of logging it locally. 90Note that 91.Nm 92currently supports 93.Li AF_INET 94.Pq IPv4 , 95.Li AF_INET6 96.Pq IPv6 , 97and 98.Li AF_LOCAL 99.Pq Unix-domain socket 100address families. 101The following address formats are valid in 102.Ar host : 103.Pp 104.Bl -tag -width "AF_LOCAL" -compact 105.It Li AF_INET 106192.168.2.1 107.It Li AF_INET6 1082001:db8::1 109.It Li AF_LOCAL 110.Pa /var/run/log 111.El 112.It Fl P Ar port 113Send the message to the specified 114.Ar port 115number on a remote system, 116which can be specified as a service name 117or as a decimal number. 118The default is 119.Dq Li syslog . 120If an unknown service name is used, 121.Nm 122prints a warning and falls back to port 514. 123.It Fl p Ar pri 124Enter the message with the specified priority. 125The priority may be specified numerically or as a 126.Li facility.level 127pair. 128For example, 129.Dq Fl p Li local3.info 130logs the message(s) as 131.Ar info Ns rmational 132level in the 133.Ar local3 134facility. 135The default is 136.Dq Li user.notice . 137.It Fl S Ar addr Ns \&: Ns Ar port 138Specify source address and/or source port when using 139.Fl h 140option. 141The same address will be used for all of the remote addresses 142when 143.Fl A 144flag is enabled. 145Note that a numeric IPv6 address in 146.Ar addr 147must be enclosed with 148.Dq \&[ 149and 150.Dq \&] . 151.It Fl t Ar tag 152Mark every line in the log with the specified 153.Ar tag 154rather than the default of current login name. 155Use 156.Fl t Ar tag[N] 157to insert specific decimal process id instead of id of 158.Nm . 159.It Ar message 160Write the message to log; if not specified, and the 161.Fl f 162flag is not 163provided, standard input is logged. 164.El 165.Sh EXIT STATUS 166.Ex -std 167.Sh EXAMPLES 168.Bd -literal -offset indent -compact 169logger System rebooted 170 171logger \-p local0.notice \-t HOSTIDM \-f /dev/idmc 172.Ed 173.Sh SEE ALSO 174.Xr syslog 3 , 175.Xr syslogd 8 176.Sh STANDARDS 177The 178.Nm 179command is expected to be 180.St -p1003.2 181compatible. 182