openwrt-owl/openwrt/package/base-files/default/etc/preinit

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#!/bin/sh
export PATH=/bin:/sbin:/usr/bin:/usr/sbin
mount none /proc -t proc
insmod diag
echo 0x01 > /proc/sys/diag
sleep 1
if [ $(cat /proc/sys/reset) = 1 -o "$(nvram get failsafe)" = 1 ]; then
export FAILSAFE=true
[ "$(nvram get boot_wait)" != "on" ] && {
nvram set boot_wait=on
nvram commit
}
while :; do { echo $(((X=(X+1)%8)%2)) > /proc/sys/diag; sleep $((X==0)); } done &
fi
mount_root ${FAILSAFE:+failsafe}
exec /sbin/init