Make entries in the system log (POSIX)
|If you aren't root, specify the full path: /usr/sbin/logger.|
logger [-is] [-f file] [-p pri] [-t tag] [message ...]
- -f file
- Log the specified file.
- 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.
- Log the message to standard error, as well as the system log.
- -t tag
- Mark every line in the log with the specified tag.
- Write the message to log; if not specified, and the -f flag isn't provided, standard input is logged.
The logger command provides a shell command interface to the syslogd daemon.
Log the message "System rebooted":
logger System rebooted
Log the file /tmp/log tagging each line with log:
logger -f /tmp/log -t log
- 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.
- When defined, SYSLOG specifies which node syslogd is running on. By default, the local node is assumed.
- Successful completion.
- An error occurred.
|Because the syslog API doesn't return error codes, only argument errors can be detected.|
syslog() in the Library Reference