写了一个解、压缩文件的shell脚本

#!/bin/bash
##for file zip and unzip
#date:2011/7/20

#input:current_filename
#use gunzip\bzip\tar commands to do this .
#two choices:pack||unpack

pack()
{
##use tar cmd to pack file
echo "Now will use tar to pack the file......"
echo "tar $CUR_FILE ......."
#sleep 1
tar -zcvf $CUR_FILE.tar.gz $CUR_FILE
if [ "$?" -eq "0" ];then
echo "pack file $CUR_FILE into tar.gz file ok~!"
else
echo "Error:Pack file into tar.gz failed~!"
exit 1
fi
}

unpack(){
##get file type
ftype=`file $CUR_FILE`
#echo file type
echo "Your file type is:###$ftype"
case "$ftype" in
"$CUR_FILE: Zip archive"*)
unzip $CUR_FILE
echo "unzip $CUR_FILE OK~!"
;;
"$CUR_FILE: gzip compressed"*)
gunzip $CUR_FILE
echo "gunzip $CUR_FILE OK~!"
;;
"$CUR_FILE: bzip2 compressed"*)
bunzip2 $CUR_FILE
echo "bunzip $CUR_FILE OK~!"
;;
*)
echo "File $CUR_FILE can not be uncompressed!!!"
exit 1
;;
esac

}

CUR_FILE="$1"
if [ -z $CUR_FILE];then
echo "Please input your filename!"
exit 1
else
echo "Your file name:$CUR_FILE"

##make target choice
echo "Which work you wanna do?"
select var in "pack" "unpack";do
break
done
echo "You selected $var file....."

case $var in
pack)
pack CUR_FILE
;;
     unpack)
unpack CUR_FILE
;;
*)
echo "Usage:select option error!"
exit 1
esac
fi