type newFileKind int

const (
	// kindNewFile means that the descriptor was passed to us via NewFile.
	kindNewFile newFileKind = iota
	// kindOpenFile means that the descriptor was opened using
	// Open, Create, or OpenFile.
	kindOpenFile
	// kindPipe means that the descriptor was opened using Pipe.
	kindPipe
	// kindSock means that the descriptor is a network file descriptor

)

var wantFlag = flag.String("want", "", "file containing previous crashing input")

func FuzzRepeat(f *testing.F) {
	i := 0
	f.Fuzz(func(t *testing.T, b []byte) {
		i++
		if i == 100 {
			f, err := os.OpenFile("want", os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0666)
			if err != nil {
				// Couldn't create the file. Return without crashing, and try
				// again.
				i--
				t.Skip(err)
			}

		r, processTTY, err := testpty.Open()
		if errors.Is(err, testpty.ErrNotSupported) {
			t.Skipf("%s", err)
		} else if err != nil {
			t.Fatalf("failed to open test PTY: %s", err)
		}
		defer r.Close()
		w, err := os.OpenFile(processTTY, os.O_RDWR, 0)
		if err != nil {
			t.Fatal(err)
		}
		defer w.Close()
		stdout, stderr := runTerminalPassthrough(t, r, w)
		if !stdout {
			t.Errorf("stdout is not a terminal")
		}
		if !stderr {

func (s *DependenciesStub) writeAllToDryRunPath() error {
	path := DryRunFilePath.Get()
	if path != "" {
		// Print the input into the given output file.
		f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0o644)
		if err != nil {
			return fmt.Errorf("unable to open dry run output file %v: %v", path, err)
		}

		defer f.Close()

		for _, line := range s.ExecutedAll {

	in, err := os.Open(srcFilepath)
	if err != nil {
		return err
	}
	defer in.Close()

	perm, err := in.Stat()
	if err != nil {
		return err
	}

	out, err := os.OpenFile(filepath.Join(targetDir, targetFilename), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm.Mode())
	if err != nil {
		return err
	}
	defer out.Close()

	if _, err := io.Copy(out, in); err != nil {
		return err
	}

		t.Fatalf("Child 1 and 2 are not in the same process group")
	}
}

func TestForeground(t *testing.T) {
	signal.Ignore(syscall.SIGTTIN, syscall.SIGTTOU)
	defer signal.Reset()

	tty, err := os.OpenFile("/dev/tty", os.O_RDWR, 0)
	if err != nil {
		t.Skipf("Can't test Foreground. Couldn't open /dev/tty: %s", err)
	}
	defer tty.Close()

	ttyFD := int(tty.Fd())

	fpgrp, err := syscall.Tcgetpgrp(ttyFD)

		for i, fi := range fis {
			des[i] = fs.FileInfoToDirEntry(fi)
		}
		return des, nil
	}
	return os.ReadDir(path)
}

// openFile calls ctxt.OpenFile (if not nil) or else os.Open.
func (ctxt *Context) openFile(path string) (io.ReadCloser, error) {
	if fn := ctxt.OpenFile; fn != nil {
		return fn(path)
	}

	f, err := os.Open(path)
	if err != nil {
		return nil, err // nil interface
	}

	if e != nil {
		return nil, &PathError{Op: "fork/exec", Path: name, Err: e}
	}

	return newPIDProcess(pid), nil
}

func (p *Process) writeProcFile(file string, data string) error {
	f, e := OpenFile("/proc/"+itoa.Itoa(p.Pid)+"/"+file, O_WRONLY, 0)
	if e != nil {
		return e
	}
	defer f.Close()
	_, e = f.Write([]byte(data))
	return e
}

func (p *Process) signal(sig Signal) error {

		case s := <-c:
			t.Fatalf("unexpected signal %v", s)
		case <-time.After(100 * time.Millisecond):
			// nothing to read - good
		}
	}
}

func postNote(pid int, note string) error {
	f, err := os.OpenFile("/proc/"+itoa.Itoa(pid)+"/note", os.O_WRONLY, 0)
	if err != nil {
		return err
	}
	defer f.Close()
	_, err = f.Write([]byte(note))
	return err

// be used for I/O; the associated file descriptor has mode O_RDWR.
// If there is an error, it will be of type *PathError.
func Create(name string) (*File, error) {
	return OpenFile(name, O_RDWR|O_CREATE|O_TRUNC, 0666)
}

// OpenFile is the generalized open call; most users will use Open
// or Create instead. It opens the named file with specified flag
// (O_RDONLY etc.). If the file does not exist, and the O_CREATE flag