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    For each NAME, indicate how it would be interpreted if used as a
    command name.
    
    If the -t option is used, `type' outputs a single word which is one of
    `alias', `keyword', `function', `builtin', `file' or `', if NAME is an
    alias, shell reserved word, shell function, shell builtin, disk file,
    or unfound, respectively.
    
    If the -p flag is used, `type' either returns the name of the disk
    file that would be executed, or nothing if `type -t NAME' would not
    return `file'.
    
    If the -a flag is used, `type' displays all of the places that contain
    an executable named `file'.  This includes aliases, builtins, and
    functions, if and only if the -p flag is not also used.
    
    The -f flag suppresses shell function lookup.
    
    The -P flag forces a PATH search for each NAME, even if it is an alias,
    builtin, or function, and returns the name of the disk file that would
    be executed.