I'm trying to do an ioctl to a USB device, under RedHat, (a 2.2.18 kernel with
the devices built in). The open call (fd = open( "/dev/usblp0", O_RDWR );)
works fine, but I can't even figure out from any HOWTO or man page, what possible
args to put in the ioctl:
retval = ioctl( fd, SIOCGIFMAP);
Initially, I'd like to requests PNP Id's from everything on the USB bus.