linux下的智能压缩/解压bash脚本

         今天无聊，于是把之前写的一个具有解压文件功能的bash脚本修改了一下，并加入了压缩功能，支持多种压缩文件格式：.gz 、.bz2、  .xz、 .lzma 、.tar 和 .gzip，而且都经过测试。脚本内容如下，我把它命名为samrtzip.sh：

      以下是我测试的结果（压缩一个hello文件夹）

bash-4.1$ ./smartzip.sh hello
your file name is:hello
please make a choice:pack or unpack
1) pack
2) unpack
#? 1
you have selected pack file...
Now we will use tar to pack the file...
please make a choice...
1) gz
2) bz2
3) xz
4) lzma
5) tar
#? 2
packing hello...
hello/
hello/hello.c
hello/hello.mod.c
hello/hello.ko
hello/modules.order
hello/hello.mod.o
hello/.hello.mod.o.cmd
hello/.tmp_versions/
hello/.tmp_versions/hello.mod
hello/.hello.ko.cmd
hello/hello.o
hello/Makefile
hello/.hello.o.cmd
hello/Module.symvers
pack the file hello OK!
bash-4.1$ ls
hello           LSP  share     tftpboot
hello.tar.bz2  nfs  smartzip.sh

解压：

bash-4.1$ ./smartzip.sh hello.tar.bz2
your file name is:hello.tar.bz2
please make a choice:pack or unpack
1) pack
2) unpack
#? 2
you have selected unpack file...
current file type is: ###hello.tar.bz2: bzip2 compressed data, block size = 900k
unpack the file hello.tar.bz2 OK!
bash-4.1$ ls
hello       LSP    share         tftpboot
hello.tar  nfs    smartzip.sh  

bash-4.1$ ./smartzip.sh hello.tar
your file name is:hello.tar
please make a choice:pack or unpack
1) pack
2) unpack
#? 2
you have selected unpack file...
current file type is: ###hello.tar: POSIX tar archive (GNU)
hello/
hello/hello.c
hello/hello.mod.c
hello/hello.ko
hello/modules.order
hello/hello.mod.o
hello/.hello.mod.o.cmd
hello/.tmp_versions/
hello/.tmp_versions/hello.mod
hello/.hello.ko.cmd
hello/hello.o
hello/Makefile
hello/.hello.o.cmd
hello/Module.symvers
unpack the file hello.tar OK!