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// 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)
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