#!/bin/sh

# Let,s chect environment. For instance what we are on 

OS=`uname -s`
MAC=`uname -m`
RELEASE=`uname -r`


# Whoarewe ? :)

ME=`whoami`


echo -n "Operating System Type: "

if test "$OS" = Linux; then
	echo "Linux"
elif test "$OS" = FreeBSD; then
	echo "FreeBSD"
elif test "$OS" = OpenBSD; then
	echo "OpenBSD"
elif test "$OS" = NetBSD; then
	echo "NetBSD"
fi



echo -n "testing /usr/include/stdio.h..."
if(test -f /usr/include/stdio.h); then
	echo "ok"
else
	exit
fi

echo -n "testing /usr/include/stdlib.h..."
if(test -f /usr/include/stdlib.h); then
	echo "ok"
else
	exit
fi

echo -n "testing /usr/include/errno.h..."
if(test -f /usr/include/errno.h); then
	echo "ok"
else
	echo "no"
fi

if test "$OS" = Linux; then
	echo -n "testing /usr/include/pcap.h..."
	if(test -f /usr/include/pcap.h); then
		echo "ok"
	else
		exit
	fi
fi


echo -n "testing /usr/include/sys/socket.h..."
if(test -f /usr/include/sys/socket.h); then
	echo "ok"
else
	exit;
fi


echo -n "testing /usr/include/netinet/in.h..."
if(test -f /usr/include/netinet/in.h); then
	echo "ok"
else
	exit;
fi


echo -n "testing /usr/include/arpa/inet.h..."
if(test -f /usr/include/arpa/inet.h); then
        echo "ok"
else
	exit
fi

echo -n "testing /usr/include/netinet/if_ether.h..."
if(test -f /usr/include/netinet/if_ether.h); then
        echo "ok"
else
	exit
fi

if test "$OS" = Linux; then
	echo -n "testing /usr/include/libnet.h..."
	if(test -f /usr/include/libnet.h); then
		echo "ok"
	else
		exit
	fi
elif test "$OS" = FreeBSD || test "$OS" = OpenBSD || test "$OS" = NetBSD; then
	echo -n "testing ${LOCALBASE}/include/libnet.h..."
	if(test -f ${LOCALBASE}/include/libnet.h); then
		echo "ok"
	else
		exit
	fi
fi






if test "$OS" = FreeBSD || test "$OS" = OpenBSD || test "$OS" = NetBSD; then
	echo -n "testing ${LOCALBASE}/lib/libnet.a..."
	if(test -f ${LOCALBASE}/lib/libnet.a); then
		echo "ok"
	else
		echo "can't find required libnet.a static library"
		exit
	fi
fi

if test "$OS" = Linux; then
	echo -n "testing /usr/lib/libnet.a..."
	if(test -f /usr/lib/libnet.a); then
		echo "ok"
	else
	       echo "can't find required libnet.a static library"
                exit
        fi

fi


if test "$OS" = Linux; then
	echo -n "testing /usr/lib/libpcap.a..."
	if(test -f /usr/lib/libpcap.a); then
		echo "ok"
	else
		echo "can't find required libpcap.a static library"
		exit
	fi
fi





echo -n "Writing MakeFile..."

echo "#!/usr/bin/make -f" > Makefile
echo "LIBNETDEFS = `libnet-config --defines`" >> Makefile
echo "LIBNETLIB = `libnet-config --libs`" >> Makefile
echo " " >> Makefile
echo " " >> Makefile
echo "all: kn_arp.c kn_main.c kn_defs.h" >> Makefile
echo "	gcc ${CFLAGS} -c kn_main.c" >> Makefile

if test "$OS" = Linux; then
	echo "	gcc -Wall \$(LIBNETDEFS) -c kn_arp.c" >> Makefile
	echo "	gcc -o knowlan kn_main.o kn_arp.o -lnet -lpcap" >> Makefile
	echo " " >> Makefile
	echo " " >> Makefile
	echo "install: knowlan" >> Makefile
	echo "	/bin/cp knowlan /usr/sbin/knowlan" >> Makefile
	echo "	/bin/chown root.root /usr/sbin/knowlan" >> Makefile
	echo "	/bin/chmod 755 /usr/sbin/knowlan" >> Makefile
elif test "$OS" = FreeBSD || test "$OS" = OpenBSD || test "$OS" = NetBSD; then
	echo "	gcc ${CFLAGS} -D__BSD__=1 -D__GLIBC__=1 -I${LOCALBASE}/include/ \$(LIBNETDEFS) -c kn_arp.c" >> Makefile
	echo "	gcc -o knowlan kn_main.o kn_arp.o ${LOCALBASE}/lib/libnet.a -lpcap" >> Makefile
	echo " " >> Makefile
        echo " " >> Makefile
        echo "install: knowlan" >> Makefile
        echo "	/bin/cp knowlan /usr/sbin/knowlan" >> Makefile
        echo "	/bin/chown root.root /usr/sbin/knowlan" >> Makefile
        echo "	/bin/chmod 755 /usr/sbin/knowlan" >> Makefile
fi

echo "clean:" >> Makefile
echo "	find ./ -name \"*.o\" -exec rm -rf {} \;" >> Makefile
echo "	find ./ -name \"knowlan\" -exec rm -rf {} \;" >> Makefile
echo "	find ./ -name \"*core\" -exec rm -rf {} \;" >> Makefile

echo "Done."