filecheck

UNIX+shell范例精解（第4版）代码

#!/bin/ksh
# Scriptname: filecheck
# Purpose: Check to see if a file exists,what type it is,
# and its permissions.

file=$1      # Variable is set to first command line argument
if [[ ! -a $file ]]
then
	print "$file does not exist"
	exit 1
fi

if [[ -d $file ]] 
then
	print "$file is a directory" 
elif [[ -f $file ]]
then 
	if [[ -r $file && -w $file && -x $file ]] 
	then 
		print "You have read, write, and execute permission on 
		file $file"
	else
		print "You don't have the correct permissions"
		exit 2
	fi
else
	print "$file is neither a file nor a directory. "
	exit 3
fi