If no arguments are specified it returns the name of the filter.
If the all switch is specified it prints the names of the filter bolt from the database. Note that filter names are case sensitive and should not contain embedded spaces.
If an error occurs or the program cannot find the filter the status flag is set to 1, otherwise it is 0.
The program looks by first determining the filter wheel position
number using tx filter of
rstage then looking up the
names in the Filter table of the database.
For example: pfilter red pfilter all