logger(1)

logger1

Make entries in the system log

Usage

logger [-is] [-f file] [-p pri] [-t tag] [message ...]

Overview

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

The following options are available:

-i

Log the process id of the logger process with each line. This flag is ignored and the process id is always logged.

-s

Log the message to standard error, as well as the system log.

-f file

Read the contents of the specified file into syslog. This option is ignored when a message is also specified.

-p 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”.

-t tag

Mark every line in the log with the specified tag rather than the default of current login name.

message

Write the message to log; if not specified, and the -f flag is not provided, standard input is logged.

Exit status

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

Examples

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

Releases

165 releases since Mac OS X 10.0; the text changed 3 times.

  1. 10.0–10.3.8
  2. 10.3.9–10.7.5
  3. 10.8–14.3
  4. 14.4–26.5

Standards

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

From remote_cmds 308 in macOS 26.5. Parsed by carta from the page's mdoc source.