Get all devices (hdd) temperatures at once.

hddtemp-report

#!/usr/bin/env sh

# Get all devices (hdd) temperatures at once.
#
# Sample of use:
#
# ```sh
# sudo hddtemp-report
# sudo hddtemp-report /tmp/hddtemp-report
# sudo hddtemp-report /tmp/hddtemp-report '%s: $alignr %s'
# ```
#
# Dependencies are ``hddtemp`` and ``sponge``

devices() {
    df | grep -Eo '^/dev/[a-z]+' | \
        while read device; do
              test -d "$device" || echo "$device"
        done
}

report() {
    devices | \
        while read device; do
            hddtemp --unit="$HDDTEMP_UNIT" "${device}"
        done
}

format() {
    local format="%s: %s"
    test -n "$1" && format="$1"

    report 2> /dev/null | \
        while read line; do\
            local tvalue=$(echo "$line" | awk '{print $NF}')
            local device=$(echo "$line" | \
                               awk '{print $1}' | perl -pe 's/:$//')

            printf "${format}\n" "${device}" "${tvalue}"
        done | sort
}

main() {
    # globals --------------------------------------------------------
    export LANGUAGE='en_US.UTF-8'
    export HDDTEMP_UNIT=C
    # params ---------------------------------------------------------
    local output='/dev/stdout'
    local format=''
    test -n "$1" && output="$1"
    test -n "$2" && format="$2"

    test -n "$format" && {
        format "$format" | sponge "$output"
        exit $?
    } || {
        report 2> /dev/null | sort
        exit $?
    }
}

main "$@"