shell制作bin文件

#!/bin/bash
curdir=`pwd`
tardir=tardir

if [ -e $tardir ];then
    echo $tardir is exist.... false!
    exit 4
fi
mkdir $curdir/$tardir

sed -n -e '1,/^exit 0$/!p' $0 > "$curdir/$tardir/packages.tar.gz" 2>/dev/null

cd $curdir/$tardir
tar xvf packages.tar.gz
rm packages.tar.gz

./auto.py
cd /

rm -rf $curdir/$tardir
exit 0