harvey/rc/bin/dmaon

#!/bin/rc
# dmaon [/dev/sd??/ctl ...] - turn on ide dma, if possible
rfork e
if (~ $#* 0)
	* = /dev/sd[C-H]?/ctl
for (ctl)
	if (test -e $ctl && grep -s '^config .* dma ' $ctl &&
	    ! grep -s '^config (848A|.* dma 00000000 )' $ctl)
		echo 'dma on' >$ctl