//usage:#define chmod_full_usage "\n\n"
//usage: "Each MODE is one or more of the letters ugoa, one of the\n"
//usage: "symbols +-= and one or more of the letters rwxst\n"
-//usage: "\nOptions:"
//usage: "\n -R Recurse"
//usage: IF_DESKTOP(
//usage: "\n -c List changed files"