#! /bin/bash -

function mycopydir( ) 
{
    if ! [ -d $2 ]
    then
	rm -rf $2
	cp -rf $1 $2
	echo "copy $1 to $2"
	return 0
    fi
    allfiles=$(ls $1)
    for one in $allfiles
    do
	if  [ -d  $1"/"$one ] 
	then
	    mycopydir $1"/"$one $2"/"$one
	    continue
	fi
	if [ -f $1"/"$one ]
	then
	    if ! [ -f $2"/"$one ]
	    then
		rm -rf $2"/"$one
		cp -f $1"/"$one $2"/"$one
		echo "copy $1/$one to  $2/$one "
	    fi
       fi
    done
}

if [ $# -lt 2 ] 
then
    echo "must two argv!"
    exit 0
fi

if ! [ -d $1 ]
then
    echo $1"not exist!"
    exit 0
fi

mycopydir $1 $2
exit 0

//shell/1295