plan9fox/rc/bin/dmaon

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