#!/bin/bash
# Get device S.M.A.R.T. and store in appropriate file.

set -e

die() {
    echo $1
    exit 1
}

get_file_name() {
    sn=$(sed -n 's/Serial Number: \+//p' < "$1" | tr ' ' '_')
    printf 'smart-%s-%s.txt' "$sn" "$(date +%F)"
}

[ -b "$1" ] && DEVICE="$1" || die 'First parameter must be block device.'

tmp=$(tempfile)
sudo smartctl -Ai "$DEVICE" > "$tmp"
fname=$(get_file_name "$tmp")
if [ -f "$fname" ] ; then
    echo "File $fname already exists. Override? [yN] "
    read answer
    case "$answer" in
        y|Y)
            ;;
        *)
            exit 0
            ;;
    esac
fi
mv "$tmp" "$fname"