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The logger command enables you to send messages to the syslogd daemon. The syntax is:
logger [ -i ] [ -f file ] [ -p priority ] [ -t tag ] [ message ]
You can specify the message priority as a facility.level pair. For example, -p local3.info assigns the message priority of the info level in the local3 facility.
The default priority is user.notice.
Therefore, the following example logs the message System rebooted to the syslogd daemon, using the default priority level notice and the facility user:
# logger System rebooted
If the user.notice selector field is configured in the /etc/syslog.conf file, the message is logged to the file designated for the user.notice selector field.
If the user.notice selector field is not configured in the /etc/syslog.conf file, you can either add the user.notice selector field to the /etc/syslog.conf file, or you can prioritize the output as follows:
# logger -p user.err System rebooted
Changing the priority of the message to user.err routes the message to the /var/adm/messages file as indicated in the /etc/syslog.conf file. A message priority can also be specified numerically.
For example, logger -i -p2 "crit" creates an entry in the message log that identifies the user.crit-facility.level pair as follows:
Nov 3 09:49:34 hostname root: [ID 702911 user.crit] crit
Logger--Syslog - search.cpan.org
logger for Windows - MonitorWare
The logger command provides a method for adding one-line entries to the system log file from the command line. One or more message arguments can be given on the command line, in which case each is logged immediately. If this is unspecified, either the file indicated with -f or the standard input is added to the log. Otherwise, a file can be specified, in which case each line in the file is logged. If neither is specified, logger reads and logs messages on a line-by-line basis from the standard input.
See environ(5) for descriptions of the following environment variables that affect the execution of logger: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES, and NLSPATH.
Like most Unix utilities logger returns zero on sucessful comletin and non-zero in case of error
logger [-i] [-f file] [-p priority] [-t tag] [message] Ö
The following options are supported:
- Uses the contents of file as the message to log.
- Logs the process ID of the logger process with each line.
- Enters the message with the specified priority. The message priority can be specified numerically, or as a facility.level pair. For example, `-p local3.info' assigns the message priority to the info level in the local3 facility. The default priority is user.notice.
- Marks each line added to the log with the specified tag.
The following operand is supported:
The following example:
example% logger System rebooted
logs the message `System rebooted' to the default priority level notice to be treated by syslogd as are other messages to the facility user.
The next example:
example% logger -p local0.notice -t HOSTIDM -f /dev/idmc
reads from the file /dev/idmc and logs each line in that file as a message with the tag `HOSTIDM' at priority level notice to be treated by syslogd as are other messages to the facility local0.
See attributes(5) for descriptions of the following attributes:
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|
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