logger

Make entries in the system log (POSIX)

If you are not root, specify the full path: /usr/sbin/logger.

Syntax:

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

Options:

-f file

Log the specified file.

-i

Log the process ID of the logger process with each line.

-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.

-s

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

-t tag

Mark every line in the log with the specified tag.

message

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

Description:

The logger command provides a shell command interface to the syslogd daemon.

Examples:

Log the message "System rebooted":

logger System rebooted

Log the file /tmp/log tagging each line with log:

logger -f /tmp/log -t log

Files:

/usr/sbin/logger

The logger utility is located in the /usr/sbin/ directory, which is not included in the default PATH of non-root users. If you are not root, specify the full path.

Environment variables:

SYSLOG

When defined, SYSLOG specifies which node syslogd is running on. By default, the local node is assumed.

Exit status:

0

Successful completion.

>0

An error occurred.

Because the syslog API doesn't return error codes, only argument errors can be detected.

See also:

syslogd

syslog() in the Library Reference