一个替代手工合并文件的shell脚本

#!/bin/sh
CURET_DIR=$(pwd)
src_path="$CURET_DIR/rootfs-src-tmp"
dst_path="$CURET_DIR/rootfs-dst-tmp"

help() {
    echo ""
    echo "eg: auto-build-rootfs src.ext2 dst.ext2"
}

#check src rootfs.ext2
if [ ! -f $CURET_DIR/$1 ]; then
        echo "no file $CURET_DIR/$1"
        help
        exit
fi
#check dst rootfs.ext2
if [ ! -f $CURET_DIR/$2 ]; then
        echo "no file $CURET_DIR/$2"
        help
        exit
fi


#check src mount path 
if [ ! -d $src_path ]; then
    echo "no dir: $src_path, we will create it!"
    mkdir -p  $src_path
else
    echo "exist dir: $src_path, pl check it,  exit"
    exit
fi
#check dst mount path
if [ ! -d $dst_path ]; then
        echo "no dir: $dst_path, we will create it!"
        mkdir -p $dst_path
else
        echo "exist dir: $dst_path, pl check it,  exit"
        exit
fi

# mount
echo ""
echo "mount $1 to  $src_path ..."
mount $1 $src_path
echo "mount $2 to  $dst_path ..."
mount $2 $dst_path

#modify file
cp $src_path/etc/default/lxc $dst_path/etc/default/lxc
cp $src_path/etc/fstab $dst_path/etc/fstab
cp $src_path/etc/init.d/rcS $dst_path/etc/init.d/rcS
cp $src_path/etc/profile $dst_path/etc/profile

#cp file
cp $src_path/usr/lib/liblxc.so $dst_path/usr/lib/liblxc.so
cp $src_path/usr/lib/liblxc.so.1 $dst_path/usr/lib/liblxc.so.1
cp $src_path/usr/lib/liblxc.so.1.6.0 $dst_path/usr/lib/liblxc.so.1.6.0

cp $src_path/usr/lib32/liblxc.so $dst_path/usr/lib32/liblxc.so
cp $src_path/usr/lib32/liblxc.so.1 $dst_path/usr/lib32/liblxc.so.1
cp $src_path/usr/lib32/liblxc.so.1.6.0 $dst_path/usr/lib32/liblxc.so.1.6.0

cp $src_path/usr/libexec/lxc/lxc-net $dst_path/usr/libexec/lxc/lxc-net
#cp $src_path/usr/share/lxc/templates/lxc-busybox $dst_path/usr/usr/share/lxc/templates/lxc-busybox

cp $src_path/etc/default/lxc-net $dst_path/etc/default/lxc-net
cp $src_path/etc/resolv.conf $dst_path/etc/

#cp dir
cp -rf $src_path/usr/local $dst_path/usr/local
cp -rf $src_path/var/lib/lxc/lxc-busybox $dst_path/var/lib/lxc/lxc-busybox


#umount
umount $src_path
umount $dst_path

rm -r $src_path
rm -r $dst_path