Add startup confirmation to disk utilities

HDD/repair-hdd.sh

@@ -16,6 +16,8 @@ Usage: sudo ./HDD/repair-hdd.sh DEVICE [zero|null|random]
 Overwrites the selected disk, then runs a SMART extended self-test. This
 destroys all data on DEVICE. Use only with a directly connected SATA disk;
 USB adapters may require adding -d sat to the smartctl calls.
+At startup, asks you to confirm that you can keep the computer and drive
+powered and connected for the hours this operation may take.
 
 Arguments:
     DEVICE             Whole-disk block device, for example /dev/sdX
@@ -55,6 +57,9 @@ case "$FILL_MODE" in
         ;;
 esac
 
+common::log "WARNING: This operation may take hours. Do not power off, reboot, or suspend the computer, or disconnect power or the drive."
+common::confirm "Can the computer and drive remain powered and connected until this operation finishes?" || exit 0
+
 for required_command in findmnt lsblk readlink swapon mkdir date tee smartctl grep umount dd sync sleep head base64; do
     common::require_cmd "$required_command"
 done