perm_check2

Unix Shell编程权威指南的配套源代码,书是好书,不过习题没有答案,要自己做了

#!/bin/bash    
# Using the new compound operator for test (( ))
# filename: perm_check2

file=./testing

if [[ -d $file ]]   
then
	echo "$file is a directory" 
elif [[ -f $file ]]
then 
	if [[ -r $file && -w $file && -x $file ]] 
	then     # nested if command
		 echo "You have read,write,and execute \
		 permission on $file."
	fi
else
	echo "$file is neither a file nor a directory. "
fi