#!/bin/sh

in_path() {
	cmd=$1 path=$2 res=1
	IFS=":"

	for dir in $path; do
		if [ -x "$dir/$cmd" ]; then
			res=0
			break
		fi
	done

	return $res
}

cmd_in_path() {
	var=$1

	if [ -n "$var" ]; then
		if [ "$(echo "$var" | cut -c 1)" = "/" ]; then
			if [ ! -x "$var" ]; then
				return 1
			fi
		elif ! in_path "$var" "$PATH"; then
			return 2
		fi
	fi
}

if [ $# -ne 1 ]; then
	echo "Usage: $0 <command>" >&2
	exit 1
fi

cmd_in_path "$1"
case $? in
0) echo "$1 found in PATH" ;;
1) echo "$1 not found or not executable" ;;
2) echo "$1 not found in PATH" ;;
esac

exit 0