luaposix 33.3.0 Reference

## curses.lua

    local curses = require "curses"

    local function printf (fmt, ...)
      return print (string.format (fmt, ...))
    end

    local function main ()
      local stdscr = curses.initscr ()

      curses.cbreak ()
      curses.echo (0)	-- not noecho !
      curses.nl( 0)		-- not nonl !

      stdscr:clear()

      local a = {}
      for k, v in pairs (curses) do
        if type (v) == "number" then a[#a+1] = k end
      end

      stdscr:mvaddstr (15, 20, "print out curses constants (y/n) ? ")
      stdscr:refresh()

      local c = stdscr:getch ()
      if c < 256 then c = string.char (c) end

      curses.endwin ()

      if c == "y" then
        table.sort (a, cmp)
        for i, k in ipairs (a) do
          printf (" %03d. %20s = 0x%08x (%d)",
            i, "curses." .. k, curses[k], curses[k])
        end
      end
    end

    -- To display Lua errors, we must close curses to return to
    -- normal terminal mode, and then write the error to stdout.
    local function err (err)
      curses.endwin ()
      print "Caught an error:"
      print (debug.traceback (err, 2))
      os.exit (2)
    end

    xpcall (main, err)

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