Display version number and exit.
.SH "RETURN CODE"
If the specified device or device addressed by specified token (option
-\fB-t\fR) was found, an exit code 0 is returned. Note the option \fB-s\fR filters
-output tags, but it does not affect return code.
+\fB-t\fR) was found and it's possible to gather any information about the
+device, an exit code 0 is returned. Note the option \fB-s\fR filters output
+tags, but it does not affect return code.
If the specified token was not found, or no (specified) devices could be
identified, an exit code of 2 is returned.