# /etc/functions-system
#
# a collection of functions and variables for scripts

source /etc/functions-colors

# removable backup disk is a SATA drive, listed in the smartctl database
DRIVEMODEL="WD7500AAKS"
SMARTPARAMS="-a -d ata -o on -S on -n standby"

Is_Backup_Drive_Available ()
{
BACKUPDISK=""
BACKUP_AVAIL="`lsscsi | grep $DRIVEMODEL | awk '{print$7}'`"
if [ -n "$BACKUP_AVAIL" ]; then
  BACKUPDISK=$BACKUP_AVAIL
fi
}

Script_Home ()
# this function determines a script's home directory from which it was launched
{
me=$0
# check if we are in the script directory
if [ "x${me:0:2}" = "x./" ]; then
    me="$(pwd)${me:1}"
fi
# echo "Script name: $me"
# echo "Script's home directory: $(dirname $me)"
}

Wait_For_Response ()
{
if [ "$1" = "" ] ; then
	printf "${BOLDRED}Warning:${COLOR_RESET}\nNo question text was passed to the ${BOLDWHITE}/etc/system-functions/Wait_For_Response${COLOR_RESET} function. Exiting.\n"
	exit 1
fi
allowedchars="YyNn"
response=
while ! [[ "${response:0:1}" =~ "[$allowedchars]" ]] ; do
	read -er -p "$1 (y/n): " response
done
}

Proceed_From_Response ()
{
if [ "$response" = "n" -o "$response" = "N" ] ; then
  echo
  echo -e "${BOLDYELLOW}Exiting.${COLOR_RESET}"
  echo
  exit 0
else
  echo
  echo "Continuing."
  echo
fi
}

Interactive_Shell ()
{
# -z $PS1 test works only with bash shells (#!/bin/bash vs. #!/bin/sh)
# the following is more portable
case $- in
  *i*) :
  # running in non-interactive mode
  INTERACTIVE="false"
    ;;
  *)  :
  # manually running this script in interactive mode
  INTERACTIVE="true"
    ;;
esac
}

Test_Directory ()
{
if [ -z $1 ] ; then
  echo "No parameter was passed to the Test_Directory function. Exiting."
  exit 1
fi
ls $1 &>/dev/null
if [ "$?" != "0" ] ; then
  echo
  echo -e "The ${BOLDGREEN}$1${COLOR_RESET} directory does not exist. Exiting."
  echo
  exit 1
else
  echo "Okay."
  echo
fi
}