#!/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