}

// Check that permuting child process fds doesn't interfere with
// reporting of fork/exec status. See Issue 14979.
func TestExecErrPermutedFds(t *testing.T) {
	testenv.MustHaveExec(t)

	attr := &os.ProcAttr{Files: []*os.File{os.Stdin, os.Stderr, os.Stdout}}
	_, err := os.StartProcess("/", []string{"/"}, attr)
	if err == nil {
		t.Fatalf("StartProcess of invalid program returned err = nil")
	}
}

func (w WaitStatus) StopSignal() Signal { return 0 }
func (w WaitStatus) TrapCause() int     { return 0 }

// XXX made up
type Rusage struct {
	Utime Timeval
	Stime Timeval
}

// XXX made up
type ProcAttr struct {
	Dir   string
	Env   []string
	Files []uintptr
	Sys   *SysProcAttr
}

type SysProcAttr struct {
}

func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {

type Rusage struct {
	Utime Timeval
	Stime Timeval
}

// ProcAttr is a placeholder to allow compilation of the [os/exec] package
// because we need Go programs to be portable across platforms. WASI does
// not have a mechanism to to spawn processes so there is no reason for an
// application to take a dependency on this type.
type ProcAttr struct {
	Dir   string
	Env   []string
	Files []uintptr
	Sys   *SysProcAttr

	r, w, err := os.Pipe()
	if err != nil {
		t.Fatalf("Pipe() got err %v, want nil", err)
	}
	defer r.Close()
	defer w.Close()

	p, err := os.StartProcess(testenv.GoToolPath(t), []string{"go"}, &os.ProcAttr{
		// N.B. On Windows, StartProcess requires exactly 3 Files. Pass
		// in a dummy pipe to avoid irrelevant output on the test stdout.
		Files: []*os.File{r, w, w},
	})
	if err != nil {

	// or, if Pgid == 0, to the new child's process ID.
	Setpgid bool
	// Setctty sets the controlling terminal of the child to
	// file descriptor Ctty. Ctty must be a descriptor number
	// in the child process: an index into ProcAttr.Files.
	// This is only meaningful if Setsid is true.
	Setctty bool
	Noctty  bool // Detach fd 0 from controlling terminal
	Ctty    int  // Controlling TTY fd
	// Foreground places the child process group in the foreground.

	// or, if Pgid == 0, to the new child's process ID.
	Setpgid bool
	// Setctty sets the controlling terminal of the child to
	// file descriptor Ctty. Ctty must be a descriptor number
	// in the child process: an index into ProcAttr.Files.
	// This is only meaningful if Setsid is true.
	Setctty bool
	Noctty  bool // Detach fd 0 from controlling terminal
	Ctty    int  // Controlling TTY fd
	// Foreground places the child process group in the foreground.

	// returning the wait status, while future calls error with "process
	// released" rather than "process done".
	p.state.CompareAndSwap(0, uint64(reason))
}

// ProcAttr holds the attributes that will be applied to a new process
// started by StartProcess.
type ProcAttr struct {
	// If Dir is non-empty, the child changes into the directory before
	// creating the process.
	Dir string

	// or, if Pgid == 0, to the new child's process ID.
	Setpgid bool
	// Setctty sets the controlling terminal of the child to
	// file descriptor Ctty. Ctty must be a descriptor number
	// in the child process: an index into ProcAttr.Files.
	// This is only meaningful if Setsid is true.
	Setctty bool
	Noctty  bool // Detach fd 0 from controlling terminal
	Ctty    int  // Controlling TTY fd
	// Foreground places the child process group in the foreground.

	// or, if Pgid == 0, to the new child's process ID.
	Setpgid bool
	// Setctty sets the controlling terminal of the child to
	// file descriptor Ctty. Ctty must be a descriptor number
	// in the child process: an index into ProcAttr.Files.
	// This is only meaningful if Setsid is true.
	Setctty bool
	Noctty  bool // Detach fd 0 from controlling terminal.
	Ctty    int  // Controlling TTY fd.

	setSetuid(t, lowPrivUser, helloBin)

	b := bytes.NewBuffer(nil)
	pr, pw, err := os.Pipe()
	if err != nil {
		t.Fatal(err)
	}

	proc, err := os.StartProcess(helloBin, []string{helloBin}, &os.ProcAttr{
		Env:   []string{"GOTRACEBACK=system", "TEST_OUTPUT=" + tempfilePath},
		Files: []*os.File{os.Stdin, pw},
	})
	if err != nil {
		if os.IsPermission(err) {