#!/bin/sh -
#
#   eject  --  Eject a CD under FreeBSD.
#
#   Oliver Fromme  <olli@fromme.com>
#
#   BSD-style copyright and standard disclaimer applies.
#

Usage()
{
	cat <<-tac >&2
		Usage:  ${0##*/} [-n] [scsi | ide | <device>]
		Default:  Look for a SCSI drive first and eject that one.
		If there is none, the first IDE drive is ejected.
		Options:
		   -n   Only show the command that would be executed.
	tac
	exit 1
}

GetSCSI()
{
	camcontrol devlist 2>/dev/null \
	| awk '
		($NF ~ /,'"$1"'[^0-9]/) {
			print substr($(NF - 5), 6) ":" $(NF - 3) ":" $(NF - 1);
		}
	'
}

GetIDE()
{
	for i in 0 1 2 3; do
		atacontrol info $i 2>/dev/null
	done \
	| awk '
		($2 ~ /^'"$1"'$/) {
			print $2;
		}
	'
}

export PATH=/bin:/sbin:/usr/bin:/usr/sbin

if [ "$1" = "-n" ]; then
	SHOWONLY=true
	shift
else
	SHOWONLY=false
fi

if [ $# -gt 1 ]; then
	Usage
fi

case "$1" in
	[Ss][Cc][Ss][Ii]|[Ss])
		CDDRV=$(GetSCSI 'cd[0-9]+')
		SCSI=true
		;;
	/dev/cd[0-9]|cd[0-9])
		CDDRV=$(GetSCSI "${1##*/}")
		if [ -n "$CDDRV" ]; then
			SCSI=true
		else
			echo "${0##*/}:  No such SCSI drive \"${1##*/}\"." >&2
			echo "Maybe you meant \"a${1##*/}\" (IDE)?" >&2
			exit 1
		fi
		;;
	[Ii][Dd][Ee]|[Ii]|[Aa][Tt][Aa]|[Aa]|[Aa][Tt][Aa][Pp][Ii])
		CDDRV=$(GetIDE 'acd[0-9]+')
		SCSI=false
		#   "atacontrol info" doesn't work as non-root.  :-(
		#   In that case use acd0 and hope it's right.
		if [ -z "$CDDRV" ]; then
			CDDRV="acd0"
		fi
		;;
	/dev/acd[0-9]|acd[0-9])
		CDDRV="${1##*/}"
		SCSI=false
		;;
	"")
		CDDRV=$(GetSCSI 'cd[0-9]+')
		if [ -n "$CDDRV" ]; then
			SCSI=true
		else
			CDDRV=$(GetIDE 'acd[0-9]+')
			SCSI=false
			#   "atacontrol info" doesn't work as non-root.  :-(
			#   In that case use acd0 and hope it's right.
			if [ -z "$CDDRV" ]; then
				CDDRV="acd0"
			fi
		fi
		;;
	*)
		Usage
		;;
esac

if [ -z "$CDDRV" ]; then
	echo "${0##*/}:  No CD-ROM drive found." >&2
	exit 1
fi

if $SCSI; then
	if $SHOWONLY; then
		echo camcontrol eject $CDDRV
	else
		exec camcontrol eject $CDDRV
	fi
else
	if $SHOWONLY; then
		echo cdcontrol -f $CDDRV eject
	else
		exec cdcontrol -f $CDDRV eject
	fi
fi

#--