#! /bin/sh

# locate the config file
if [ "$1" = "-config" ]; then
	conffile=$2
	shift 2
else
	conffile=./.qemurc
fi

# hard-coded defaults here
qemu=
vde=off
boot=harddisk
megs=32
fda=
fdb=
hda=
hdachs=
hdb=
cdrom=
hdc=
hdd=
audio=off
pci=on
macaddr=
cirrus=off
localtime=off
usernet=off
nics=1
netscript=/etc/qemu-ifup
graphic=on

# if we have a valid config file, load it
if [ -f $conffile ]; then
	. $conffile
fi

# sanity check
if [ -z "$boot" ]; then
	echo 'Option boot must be set to floppy, harddisk, or cdrom, or'
	echo 'the decapriated options a, c, or d!'
	exit 1
fi
if [ -z "$megs" ]; then
#TODO: make sure this is a number
	echo 'Option megs must be set to a valid number!'
	exit 1
fi
if [ -z "$nics" ]; then
#TODO: make sure this is a number
	echo 'Option nics must be set to a valid number! (most likely this number will be 1)'
	exit 1
fi
if [ -z "$netscript" ]; then
	echo 'Warning: option netscript is not set. Will use /etc/qemu-ifup if asked.'
fi

#if [ "$boot" = "floppy" -o "$boot" = "a" ]; then
	#if [ -z "$fda" ]; then
		#echo 'Option fda must be set to a valid floppy image!'
		#exit 1
	#fi
#elif [ "$boot" = "harddisk" -o "$boot" = "c" ]; then
	#if [ -z "$hda" ]; then
		#echo 'Option hda must be set to a valid hard disk image!'
		#exit 1
	#fi
#elif [ "$boot" = "cdrom" -o "$boot" = "d" ]; then
	#if [ -z "$cdrom" ]; then
		#echo 'Option cdrom must be set to a valid cdrom iso image!'
		#exit 1
	#fi
#else
	# sanity check
	#echo -n "Option boot set to unknown value $boot. "
	#echo 'I don't know what to do!'
	#exit 1
#fi

# convert recommended values to the one qemu expects
if [ "$boot" = "floppy" ]; then
	boot=a
elif [ "$boot" = "harddisk" ]; then
	boot=c
elif [ "$boot" = "cdrom" ]; then
	boot=d
fi

# isa hack (Note that setting $pci overrides $isa completely)
if [ -z "$pci" ]; then
	if [ "$isa" = "on" ]; then
		pci = off
	else
		pci = on
	fi
fi

# interpret out configuration
comline=`which qemu`
if [ -n "$qemu" ]; then
	comline="$qemu"
fi
if [ "$vde" = "on" ]; then
	comline="vdeq $comline"
fi
comline="$comline -boot $boot"
comline="$comline -m $megs"
if [ -n "$fda" ]; then
	comline="$comline -fda $fda"
fi
if [ -n "$fdb" ]; then
	comline="$comline -fdb $fdb"
fi
if [ -n "$hda" ]; then
	comline="$comline -hda $hda"
fi
if [ -n "$hdachs" ]; then
	comline="$comline -hdachs $hdachs"
fi
if [ -n "$hdb" ]; then
	comline="$comline -hdb $hdb"
fi
if [ -n "$cdrom" ]; then
	comline="$comline -cdrom $cdrom"
fi
if [ -n "$hdc" ]; then
	comline="$comline -hda $hdc"
fi
if [ -n "$hdd" ]; then
	comline="$comline -hda $hdd"
fi
if [ "$audio" = "on" ]; then
	comline="$comline -enable-audio"
fi
if [ "$pci" != "on" ]; then
	comline="$comline -isa"
fi
if [ -n "$macaddr" ]; then
	comline="$comline -macaddr $macaddr"
fi
if [ "$cirrus" = "on" ]; then
	comline="$comline -cirrusvga"
fi
if [ "$localtime" = "on" ]; then
	comline="$comline -localtime"
fi
if [ "$usernet" = "on" ]; then
	comline="$comline -user-net"
elif [ "$usernet" = "dummy" ]; then
	comline="$comline -dummy-net"
fi
# Don't pass the parameter if it is the qemu default
if [ "$nics" != "1" ]; then
	comline="$comline -nics $nics"
fi
if [ -n "$netscript" ]; then
	# Don't pass the parameter if it is the qemu default
	if [ "$netscript" != "/etc/qemu-ifup" ]; then
		comline="$comline -n $netscript"
	fi
fi
if [ "$graphic" != "on" ]; then
	comline="$comline -nographic"
fi
echo $comline "$@"
exec $comline "$@"