Simulate device-file in userland?

[Jan Branbergen]

Dear Sirs,

is it appreciated if i introduce myself first? if so, please let me know.

i was wondering if it is possible to simulate a device-file ( for example a serial port or videograbbing device ) in userland? 

i have looked at mkfifo, but i think that does not suit my needs: i am interested in ioctl calls as well. 

are there any examples in ports? is this possible at all?

regards,

Jan