busybox-1.19.3/examples/var_service/gpm/run

#!/bin/sh

exec >/dev/null
exec 2>&1
exec </dev/null

user=root
options="-D -2 -m /dev/psaux -t ps2"
#options="-D -2 -m /dev/ttyS0 -t bare"

exec \
env - PATH="$PATH" \
softlimit \
setuidgid "$user" \
gpm $options