> Two or three out of these are superfluous and could be shared with a larger program if it were just a function in it. They don't "parse" command line. They u

> Two or three out of these are superfluous and could be shared with a larger program if it were just a function in it. They don't "parse" command line. They use getopt/getopt_long, which does the parsing. Besides using library functions, GNU coreutils commands do share code.