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LOGGER(1) MidnightBSD General Commands Manual LOGGER(1)

logger — make entries in the system log

logger [-46Ais] [-f file] [-H hostname] [-h host] [-P port] [-p pri] [-S addr:port] [-t tag] [message ...]

The logger utility provides a shell command interface to the syslog(3) system log module.

The following options are available:

Force logger to use IPv4 addresses only.
Force logger to use IPv6 addresses only.
By default, logger tries to send the message to only one address, even if the host has more than one A or AAAA record. If this option is specified, logger tries to send the message to all addresses.
Log the process id of the logger process with each line. This flag is ignored and the process id is always logged. See also -t.
Log the message to standard error, as well as the system log.
file
Read the contents of the specified file into syslog. This option is ignored when a message is also specified.
hostname
Set the hostname in the header of the message to specified value. If not specified, host part of gethostname(3) will be used.
host
Send the message to the remote system host instead of logging it locally. Note that logger currently supports AF_INET (IPv4), AF_INET6 (IPv6), and AF_LOCAL (Unix-domain socket) address families. The following address formats are valid in host:

192.168.2.1
2001:db8::1
/var/run/log
port
Send the message to the specified port number on a remote system, which can be specified as a service name or as a decimal number. The default is “syslog”. If an unknown service name is used, logger prints a warning and falls back to port 514.
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 informational level in the local3 facility. The default is “user.notice”.
addr:port
Specify source address and/or source port when using -h option. The same address will be used for all of the remote addresses when -A flag is enabled. Note that a numeric IPv6 address in addr must be enclosed with “[” and “]”.
tag
Mark every line in the log with the specified tag rather than the default of current login name. Use -t tag[N] to insert specific decimal process id instead of id of logger.
message
Write the message to log; if not specified, and the -f flag is not provided, standard input is logged.

The logger utility exits 0 on success, and >0 if an error occurs.

logger System rebooted

logger -p local0.notice -t HOSTIDM -f /dev/idmc

syslog(3), syslogd(8)

The logger command is expected to be IEEE Std 1003.2 (“POSIX.2”) compatible.

July 3, 2023 midnightbsd-3.1