tunelp [options] device
tunelp sets several parameters for the /dev/lp? devices, for better performance (or for any performance at all, if your printer won't work without it...) Without parameters, it tells whether the device is using interrupts, and if so, which one. With parameters, it sets the device characteristics accordingly.
-o, -C, and -s all require a Linux kernel version of 1.1.76 or later.
-C requires a Linux version prior to 2.1.131.
-T requires a Linux version of 2.1.131 or later.
By some unfortunate coincidence the ioctl LPSTRICT of 2.0.36 has the same number as the ioctl LPTRUSTIRQ introduced in 2.1.131. So, use of the -T option on a 2.0.36 kernel with an tunelp compiled under 2.1.131 or later may have unexpected effects.
The tunelp command is part of the util-linux package and is available from Linux Kernel Archive