Function ioOpenFile

iolib.go:617–652

(L *LState)

var ioOpenOpions = []string{"r", "rb", "w", "wb", "a", "ab", "r+", "rb+", "w+", "wb+", "a+", "ab+"}

func ioOpenFile(L *LState) int {
	path := L.CheckString(1)
	if L.GetTop() == 1 {
		L.Push(LString("r"))
	}
	mode := os.O_RDONLY
	perm := 0600
	writable := true
	readable := true
	switch ioOpenOpions[L.CheckOption(2, ioOpenOpions)] {
	case "r", "rb":
		mode = os.O_RDONLY
		writable = false
	case "w", "wb":
		mode = os.O_WRONLY | os.O_TRUNC | os.O_CREATE
		readable = false
	case "a", "ab":
		mode = os.O_WRONLY | os.O_APPEND | os.O_CREATE
	case "r+", "rb+":
		mode = os.O_RDWR
	case "w+", "wb+":
		mode = os.O_RDWR | os.O_TRUNC | os.O_CREATE
	case "a+", "ab+":
		mode = os.O_APPEND | os.O_RDWR | os.O_CREATE
	}
	file, err := newFile(L, nil, path, mode, os.FileMode(perm), writable, readable)
	if err != nil {
		L.Push(LNil)
		L.Push(LString(err.Error()))
		L.Push(LNumber(1)) // C-Lua compatibility: Original Lua pushes errno to the stack
		return 3
	}
	L.Push(file)
	return 1

}

var ioPopenOptions = []string{"r", "w"}