const os.kindOpenFile

4 uses

	os (current package)
		file_unix.go#L147: 	kindOpenFile
		file_unix.go#L173: 	pollable := kind == kindOpenFile || kind == kindPipe || kind == kindSock || nonBlocking
		file_unix.go#L183: 	if kind == kindOpenFile {
		file_unix.go#L297: 	f := newFile(r, name, kindOpenFile, unix.HasNonblockFlag(flag))