luaposix 33.4.0 Reference

## getopt.lua

    local P = require 'posix'

    local short = "ha:s:"

    local long = {
      {"help",  "none", 'h'},
      {"aleph", "required", 'a'},
      {"start", "required", 's'}
    }

    local last_index = 1
    for r, optarg, optind, li in P.getopt (arg, short, long) do
      if r == '?' then
        return print  'unrecognized option'
      end
      last_index = optind
      if r == 'h' then
        print 'help'
      elseif r == 'a' or r == 's' then
        print ('we were passed', r, optarg)
      end
    end

    for i = last_index, #arg do
      print (i, arg[i])
    end

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