# no args, print colored message, returns 0 if hostname seems valid, returns 1 if hostname is a default one
hostname_test() {
	case $hostname in
		"(none)"|eficast|"")	echo_color white red ">>> " "hostname is not customized : $hostname" ; return 1 ;;
		*\&*)			echo_color white red ">>> " "hostname should not contain special characters or should not be FQDN : $hostname" ; return 2 ;;
		*\(*)			echo_color white red ">>> " "hostname should not contain special characters or should not be FQDN : $hostname" ; return 2 ;;
		*\{*)			echo_color white red ">>> " "hostname should not contain special characters or should not be FQDN : $hostname" ; return 2 ;;
		*\;*)			echo_color white red ">>> " "hostname should not contain special characters or should not be FQDN : $hostname" ; return 2 ;;
		*\<*)			echo_color white red ">>> " "hostname should not contain special characters or should not be FQDN : $hostname" ; return 2 ;;
		*\`*)			echo_color white red ">>> " "hostname should not contain special characters or should not be FQDN : $hostname" ; return 2 ;;
		*\ *)			echo_color white red ">>> " "hostname should not contain special characters or should not be FQDN : $hostname" ; return 2 ;;
		*)			echo_color green black ">>> " "hostname is $hostname" ; return 0 ;;
	esac
}

# no args, print colored message, returns 0 if NFS is read-only, returns 1 if NFS is read-write (needed for image capture)
nfswrite_test() {
	if ! touch /mnt/nfs/.writetest
	then	echo_color green black ">>> " "NFS is read-only"
		return 0
	else	echo_color white blue ">>> " "NFS is read-write"
		return 1
	fi
}

# no args, print colored message, returns 0 if sda is present and is sata, returns >0 if it is not
firstdisk_test() {
	diskinfo=$(lsblk --list --output TRAN,MODEL --noheadings --nodeps /dev/sda)
	case $diskinfo in
		sata*)	echo_color green black ">>> " "First disk is SATA and is available ($diskinfo)"
		return 0
		;;
		usb*)	echo_color white red ">>> " "First disk is USB ($diskinfo)"
		return 1
		;;
		*)	echo_color white red ">>> " "First disk is unknown ($diskinfo)"
		return 2;
		;;
	esac
}

# $1 : scriptname, print colored message, returns 0 script is available, returns 1 if not
scriptavailability_test() {
	script=$scriptdir/$1
	if [ -r $script ]
	then	echo_color green black ">>> " "Script $script is available"
		return 0
	else	echo_color white blue ">>> " "Script $script is missing or unreadable"
		return 1
	fi
}