| // Copyright 2018 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| package poll | |
| import ( | |
| "syscall" | |
| _ "unsafe" // for go:linkname | |
| ) | |
| // OpenDir returns a pointer to a DIR structure suitable for | |
| // ReadDir. In case of an error, the name of the failed | |
| // syscall is returned along with a syscall.Errno. | |
| func (fd *FD) OpenDir() (uintptr, string, error) { | |
| // fdopendir(3) takes control of the file descriptor, | |
| // so use a dup. | |
| fd2, call, err := fd.Dup() | |
| if err != nil { | |
| return 0, call, err | |
| } | |
| var dir uintptr | |
| for { | |
| dir, err = fdopendir(fd2) | |
| if err != syscall.EINTR { | |
| break | |
| } | |
| } | |
| if err != nil { | |
| syscall.Close(fd2) | |
| return 0, "fdopendir", err | |
| } | |
| return dir, "", nil | |
| } | |
| // Implemented in syscall/syscall_darwin.go. | |
| // | |
| //go:linkname fdopendir syscall.fdopendir | |
| func fdopendir(fd int) (dir uintptr, err error) | |