用SHELL编程问题，如何判断文件类型

应该是bash吧：脚本的写法是这样的：file_name=xxxxxxxif [ -d $file_name ]

then

echo "directory"

else

echo "not a directory"

fi 下面是全部参数，里面就有你需要的：-a file exists.

-b file exists and is a block special file.

-c file exists and is a character special file.

-d file exists and is a directory.

-e file exists (just the same as -a).

-f file exists and is a regular file.

-g file exists and has its setgid(2) bit set.

-G file exists and has the same group ID as this process.

-k file exists and has its sticky bit set.

-L file exists and is a symbolic link.

-n string length is not zero.

-o Named option is set on.

-O file exists and is owned by the user ID of this process.

-p file exists and is a first in, first out (FIFO) special file or

named pipe.

-r file exists and is readable by the current process.

-s file exists and has a size greater than zero.

-S file exists and is a socket.

-t file descriptor number fildes is open and associated with a

terminal device.

-u file exists and has its setuid(2) bit set.

-w file exists and is writable by the current process.

-x file exists and is executable by the current process.

-z string length is zero.

unix中文件的属性是不依赖于

扩展名

的，加上扩展名只是为了 *** 作者的方便。unix中一个文件是否能被执行，和

后缀名

没有太大的关系，主要看文件的属性有关。

例如：

-rwxr-xr-x

1

mythmy

mythmy

85

2009-03-09

11:45

A.txt

这个文件的文件名是A.txt

但是这是个可执行文件，因为其属性是：755。所以这个文件是所有人都可读，可执行的。

所以说不管扩展名是.sh还是.c只要其

文件属性

是可执行,就一样可以执行SHELL语句。

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