#!/bin/sh -u
# Perform several tests on the first argument to this script.
# If no arguments, do the tests on /etc/passwd instead.
# -IAN! idallen@idallen.ca

# First, find out which pathname we are going to be testing.
#
if [ $# -ge 1 ] ; then
    	# use first argument as pathname (BAD: ignores other arguments)
	path="$1"
	echo "Using first argument: $1"
else
    	# use a default because first argument is missing
	path="/etc/passwd"
	echo "Script has no arguments; using default path: $path"
fi
echo "You are using pathname '$path'."

if [ -e "$path" ] ; then
	echo "The path '$path' exists"
else
	echo "The path '$path' does not exist" \
		"(or is missing or inaccessible)"
fi

if [ -d "$path" ] ; then
	echo "The path '$path' is a directory"
else
	echo "The path '$path' is not a directory" \
		"(or is missing or inaccessible)"
fi

if [ -f "$path" ] ; then
	echo "The path '$path' is a plain file"
else
	echo "The path '$path' is not a plain file" \
		"(or is missing or inaccessible)"
fi

if [ -r "$path" ] ; then
	echo "The path '$path' is readable"
else
	echo "The path '$path' is not readable" \
		"(or is missing or inaccessible)"
fi

if [ ! -w "$path" ] ; then
	echo "The path '$path' is not writable" \
		"(or is missing or inaccessible)"
else
	echo "The path '$path' is writable"
fi

if [ ! -x "$path" ] ; then
	echo "The path '$path' is not executable" \
		"(or is missing or inaccessible)"
else
	echo "The path '$path' is executable"
fi