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hdparm_is_on_battery() {
on_ac_power 2>/dev/null
[ $? -eq 1 ]
}
hdparm_set_option()
{
local NEW_OPT= NEW_DEF=
if test -n "$DISC"; then
for i in $OPTIONS; do
if test x${i%${i#??}} != x${1%${1#??}}; then
NEW_OPT="$NEW_OPT $i"
else
NEW_OPT=${NEW_OPT%-q}
fi
done
OPTIONS="$NEW_OPT $OPT_QUIET $1"
else
for i in $DEFAULT; do
if test x${i%${i#??}} != x${1%${1#??}}; then
NEW_DEF="$NEW_DEF $i"
else
NEW_DEF=${NEW_DEF%-q}
fi
done
DEFAULT="$NEW_DEF $DEF_QUIET $1"
fi
}
hdparm_eval_value()
{
case $1 in
off|0)
hdparm_set_option "$2"0
;;
on|1)
hdparm_set_option "$2"1
;;
*)
log_failure_msg "Unknown Value for $2: $1"
exit 1
;;
esac
}
# It isn't safe to set an APM policy by default on Firewire or USB devices.
# See https://bugs.launchpad.net/bugs/515023.
hdparm_try_apm()
{
# set our default global apm policy here.
if [ -z "$ID_PATH" ]; then
local ID_PATH="$(udevadm info -n "$1" -q property 2>/dev/null | sed -n 's/^ID_PATH=//p')" || true
fi
case $ID_PATH in
pci-*-ieee1394-*|pci-*-usb-*)
return 1
;;
esac
# Only activate APM on disks that support it.
if [ -z "$ID_ATA_FEATURE_SET_APM" ]; then
local ID_ATA_FEATURE_SET_APM="$(udevadm info -n "$1" -q property 2>/dev/null | sed -n 's/^ID_ATA_FEATURE_SET_APM=//p')" || true
fi
if [ "$ID_ATA_FEATURE_SET_APM" = "1" ]; then
return 0
fi
return 1
}
# parse /etc/hdparm.conf and spit out a list of options for the specified
# disk, taking into account global settings in /etc/hdparm.conf, current AC
# power status, and (as a fallback) the default apm settings on Ubuntu.
# arguments: device_name
# returns 0 on success, 1 on failure.
# options to be passed to hdparm are returned on stdout.
hdparm_options()
{
local WANTED_DISK="$1"
local DISC= DEFAULT= DEF_QUIET= COMMAND_LINE=
# if the below is guaranteed to spawn a subshell, then this next line is
# unnecessary
local OPTIONS OPT_QUIET KEY SEP VALUE
egrep -v '^[[:space:]]*(#|$)' /etc/hdparm.conf |
{
# set our default global apm policy here.
if hdparm_try_apm "$WANTED_DISK"; then
if hdparm_is_on_battery; then
hdparm_set_option -B128
# set a spindown time of 3 minutes by default so the disk isn't
# constantly power cycling on a busy machine if spindown is
# enabled
hdparm_set_option -S36
else
hdparm_set_option -B254
fi
fi
while read KEY SEP VALUE; do
case $SEP in
'{')
case $KEY in
command_line)
unset DISC
unset OPTIONS
unset OPT_QUIET
COMMAND_LINE=1
;;
*)
if [ -h "$KEY" ]
then
DISC=$(readlink -m "$KEY")
DISC=${DISC%%[[:digit:]]*}
else
DISC=$KEY
fi
OPTIONS=$DEFAULT
OPT_QUIET=$DEF_QUIET
;;
esac
;;
=)
case $KEY in
read_ahead_sect)
hdparm_set_option -a$VALUE
;;
lookahead)
hdparm_eval_value $VALUE -A
;;
bus)
hdparm_eval_value $VALUE -b
;;
apm)
if ! hdparm_is_on_battery; then
hdparm_set_option -B$VALUE
fi
;;
apm_battery)
if hdparm_is_on_battery; then
hdparm_set_option -B$VALUE
fi
;;
io32_support)
hdparm_set_option -c$VALUE
;;
dma)
hdparm_eval_value $VALUE -d
;;
defect_mana)
hdparm_eval_value $VALUE -D
;;
cd_speed)
hdparm_set_option -E$VALUE
;;
mult_sect_io)
hdparm_set_option -m$VALUE
;;
prefetch_sect)
hdparm_set_option -P$VALUE
;;
read_only)
hdparm_eval_value $VALUE -r
;;
write_read_verify)
hdparm_eval_value $VALUE -R
;;
spindown_time)
hdparm_set_option -S$VALUE
;;
force_spindown_time)
hdparm_set_option force_spindown_time$VALUE
;;
poweron_standby)
hdparm_eval_value $VALUE -s
;;
interrupt_unmask)
hdparm_eval_value $VALUE -u
;;
write_cache)
hdparm_eval_value $VALUE -W
;;
transfer_mode)
hdparm_set_option -X$VALUE
;;
acoustic_management)
hdparm_set_option -M$VALUE
;;
keep_settings_over_reset)
hdparm_eval_value $VALUE -k
;;
keep_features_over_reset)
hdparm_eval_value $VALUE -K
;;
chipset_pio_mode)
hdparm_set_option -p$VALUE
;;
security_unlock)
hdparm_set_option --security-unlock $VALUE
;;
security_pass)
hdparm_set_option --security-set-pass $VALUE
;;
security_disable)
hdparm_set_option --security-disable $VALUE
;;
user-master)
hdparm_set_option --user-master $VALUE
;;
security_mode)
hdparm_set_option --security-mode $VALUE
;;
ROOTFS)
;;
*)
echo "Unknown option $KEY"
exit 1
;;
esac
;;
"")
case $KEY in
'}')
if [ -z "$DISC" ] && [ -z "$COMMAND_LINE" ]; then
echo "No disk enabled. Exiting" >&2
return 1
fi
if [ -n "$OPTIONS" ] && [ "$DISC" = "$WANTED_DISK" ]
then
echo $OPTIONS
return 0
fi
COMMAND_LINE=
;;
quiet)
if [ -n "$DISC" ]; then
OPT_QUIET=-q
else
DEF_QUIET=-q
fi
;;
standby)
hdparm_set_option -y
;;
sleep)
hdparm_set_option -Y
;;
disable_seagate)
hdparm_set_option -Z
;;
security_freeze)
hdparm_set_option --security-freeze
;;
*)
if [ -z "$COMMAND_LINE" ]; then
echo "unknown option $KEY" >&2
return 1
fi
;;
esac
;;
*)
if [ -z "$COMMAND_LINE" ]; then
echo "unknown separator $SEP" >&2
return 1
fi
;;
esac
done
# parsed the whole file and didn't find the disk,
# so try the default instead.
if [ -n "$DEFAULT" ]; then
echo $DEFAULT
return 0
fi
}
}