De link -
The syslog format typically contains a timestamp, hostname, app name, and process ID along with whatever custom message was sent.
De link :
The APP-NAME field SHOULD identify the device or application that originated the message. It is a string without further semantics. It is intended for filtering messages on a relay or collector. The NILVALUE MAY be used when the syslog application has no idea of its APP-NAME or cannot provide that information.
Tente um exemplo (Linux) para você:
logger -t weirdername "hello, self"