example02.05

UNIX[1].shell范例精解(第4版)_code

#!/bin/sh 
if [ -a file ]
then
	echo file exists
fi
 
if [ -d file ] 
then
 	 echo file is a directory
fi

if [ -s file ] 
then
	 echo file is not of zero length 
fi

if [ -r file -a -w file ]
then
	 echo file is readable and writeable
fi