#!/bin/sh


# First try SCT Status, which only ties up the SATA bus
# for 1.5 msec.
temperature=$(
  smartctl -l scttempsts $1 2>/dev/null | {
    while IFS=":" read text temperature junk; do
      if [ "$text" = "Current Temperature" ]; then
        # trim "    55 Celsius"  down to just "55".
        echo "$temperature" | { IFS=" " read temp junk; echo "$temp"; }
      fi
    done;
  }
)
if [ -n "$temperature" ]; then
  echo "$temperature"
  exit 0
fi

# Fall back to SENSE CONDITION, which ties up the bus for 188 msec.
temperature=$(
  hdparm -H $1 2>/dev/null | {
    while IFS=":" read text temperature junk; do
      if [ "${text#*celsius}" != "$text" ]; then
        # trim "    55"  down to just "55".
        echo "$temperature" | { IFS=" " read temp junk; echo "$temp"; }
      fi
    done;
  }
)
if [ -n "$temperature" ]; then
  echo "$temperature"
  exit 0
fi

exit 1