// flags and shouldn't be considered as replacement
// for os.OpenFile().
func LockedOpenFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
	return lockedOpenFile(path, flag, perm, 0)
}

// Open - Call os.OpenFile
func Open(path string, flag int, perm os.FileMode) (*os.File, error) {
	return os.OpenFile(path, flag, perm)

	return RenameSys(src, dst)
}

// OpenFile captures time taken to call os.OpenFile
func OpenFile(name string, flag int, perm os.FileMode) (f *os.File, err error) {
	switch flag & writeMode {
	case writeMode:
		defer updateOSMetrics(osMetricOpenFileW, name)(err)
	default:
		defer updateOSMetrics(osMetricOpenFileR, name)(err)
	}
	return os.OpenFile(name, flag, perm)
}

		if err := syscall.Mkfifo(name, 0o600); err != nil {
			t.Fatal(err)
		}
		// The problem only occurs if we use O_NONBLOCK here.
		rd, err := os.OpenFile(name, os.O_RDONLY|syscall.O_NONBLOCK, 0o600)
		if err != nil {
			t.Fatal(err)
		}
		wr, err := os.OpenFile(name, os.O_WRONLY|syscall.O_NONBLOCK, 0o600)
		if err != nil {
			t.Fatal(err)
		}
		const msg = "message"

	"testing"
)

func TestLookPathUnixEmptyPath(t *testing.T) {
	// Not parallel: uses Chdir and Setenv.

	tmp := t.TempDir()
	chdir(t, tmp)

	f, err := os.OpenFile("exec_me", os.O_CREATE|os.O_EXCL, 0700)
	if err != nil {
		t.Fatal("OpenFile failed: ", err)
	}
	err = f.Close()
	if err != nil {
		t.Fatal("Close failed: ", err)
	}

	t.Setenv("PATH", "")

	path, err := exec.LookPath("exec_me")

	}
	ofile, ok := file.(*openFile)
	if !ok {
		return nil, &fs.PathError{Op: "read", Path: name, Err: errors.New("is a directory")}
	}
	return []byte(ofile.f.data), nil
}

// An openFile is a regular file open for reading.
type openFile struct {
	f      *file // the file itself
	offset int64 // current read offset
}

var (
	_ io.Seeker   = (*openFile)(nil)
	_ io.ReaderAt = (*openFile)(nil)

	"syscall"
)

func badStateFile() (*os.File, error) {
	if os.Getuid() != 0 {
		return nil, errors.New("must be root")
	}
	// Using OpenFile for a device file is an easy way to make a
	// file attached to the runtime-integrated network poller and
	// configured in halfway.
	return os.OpenFile("/dev/net/tun", os.O_RDWR, 0)
}

func isBadStateFileError(err error) (string, bool) {
	switch err {
	case poll.ErrNotPollable, syscall.EBADFD:

	// file at mu.Path is write-only, the call to OpenFile will fail with a
	// permission error. That's actually what we want: if we add an RLock method
	// in the future, it should call OpenFile with O_RDONLY and will require the
	// files must be readable, so we should not let the caller make any
	// assumptions about Mutex working with write-only files.
	f, err := OpenFile(mu.Path, os.O_RDWR|os.O_CREATE, 0666)
	if err != nil {

	certPath := filepath.Join(tmpdir, constants.APIServerCertName)
	certFile, err := os.OpenFile(certPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666)
	if err != nil {
		t.Fatalf("Failed to create cert file %s: %v", certPath, err)
	}
	certFile.Close()

	keyPath := filepath.Join(tmpdir, constants.APIServerKeyName)
	keyFile, err := os.OpenFile(keyPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666)
	if err != nil {

import (
	"io/fs"
	"os"
)

// hasWritePerm reports whether the current user has permission to write to the
// file with the given info.
func hasWritePerm(path string, _ fs.FileInfo) bool {
	if f, err := os.OpenFile(path, os.O_WRONLY, 0); err == nil {
		f.Close()
		return true
	}
	return false

// see this ZFS-on-Linux commit message:
// https://github.com/openzfs/zfs/commit/a584ef26053065f486d46a7335bea222cb03eeea

// OpenFileDirectIO wrapper around os.OpenFile nothing special
func OpenFileDirectIO(filePath string, flag int, perm os.FileMode) (*os.File, error) {
	return os.OpenFile(filePath, flag, perm)
}

// DisableDirectIO is a no-op
func DisableDirectIO(f *os.File) error {
	return nil
}