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|
#!/sbin/runscript
# METHOD
# ------
# if /dev/ide exists, find all block devices beneath it named disc, cd, or
# generic.
#
# for the disc and cd ones, if there is a a matching /dev/hdX symlink and
# hdX_args is set in the config file, use hdX_args. otherwise, if there is a
# matching /dev/discs/discX or /dev/cdroms/cdromX symlink, and discX_args or
# cdromX_args is set in the config file, use discX_args / cdromX_args. finally,
# if all_args is set in the config file, use that.
#
# for the generic ones, sort them and look for genericX_args in the config file
# or use all_args.
#
# if /dev/ide does not exist, check the /dev/hdX entries, and see which ones
# correspond to real devices by opening them for reading. then check hdX_args
# and all_args in the config file.
#
# for each device considered, if no args are found in the config file, do not
# run hdparm.
depend() {
before bootmisc
}
do_hdparm() {
local e=
eval e=\$${extra_args}
[ -z "${args}${all_args}${e}" ] && return 0
if [ -n "${args:=${all_args} ${e}}" ] ; then
local orgdevice=$(readlink -f "${device}")
if [ -b "${orgdevice}" ] ; then
ebegin "Running hdparm on ${device}"
hdparm ${args} "${device}" > /dev/null
eend $?
fi
fi
}
scan_devfs() {
local extra_args="pata_all_args" device= alias= args=
# devfs compatible systems
for device in $(find /dev/ide -name disc) ; do
args=''
for alias in /dev/hd? ; do
if [ "${alias}" -ef "${device}" ] ; then
device=${alias}
eval args=\$"$(basename "${alias}")"_args
break
fi
done
if [ -z "$args" ] ; then
for alias in /dev/discs/* ; do
if [ "${alias}"/disc -ef "${device}" ]; then
device="${alias}/disc"
eval args=\$"$(basename "${alias}")"_args
break
fi
done
fi
do_hdparm
done
for device in $(find /dev/ide -name cd) ; do
args=''
for alias in /dev/hd? ; do
if [ "${alias}" -ef "${device}" ] ; then
device=${alias}
eval args=\$"$(basename "${alias}")"_args
break
fi
done
if [ -z "$args" ] ; then
for alias in /dev/cdroms/* ; do
if [ "${alias}" -ef "${device}" ] ; then
device=${alias}
eval args=\$"$(basename "${alias}")"_args
break
fi
done
fi
do_hdparm
done
local count=0
# of course, the sort approach would fail here if any of the
# host/bus/target/lun numbers reached 2 digits..
for device in $(find /dev/ide -name generic | sort) ; do
eval args=\$generic${count}_args
do_hdparm
count=$((${count} + 1))
done
}
scan_nondevfs() {
# non-devfs compatible system
for device in /dev/hd* /dev/sd* ; do
[ -e "${device}" ] || continue
case "${device}" in
*[0-9]) continue ;;
/dev/hd*) extra_args="pata_all_args" ;;
/dev/sd*) extra_args="sata_all_args" ;;
*) extra_args="" ;;
esac
# check that the block device really exists by
# opening it for reading
local errmsg= status= nomed=1
errmsg=$(export LC_ALL=C ; : 2>&1 <"${device}")
status=$?
case ${errmsg} in
*": No medium found") nomed=0;;
esac
if [ -b "${device}" ] && [ "${status}" = "0" -o "${nomed}" = "0" ] ; then
local conf_var="${device##*/}_args"
eval args=\$${conf_var}
do_hdparm
fi
done
}
start() {
if get_bootparam "nohdparm" ; then
ewarn "Skipping hdparm init as requested in kernel cmdline"
return 0
fi
if [ -e /dev/.devfsd -a -d /dev/ide ] ; then
scan_devfs
else
scan_nondevfs
fi
}
|
