}

	os.Setenv("GOPATH", filepath.Join(GOPATH, "alt"))
	if err := os.Chdir(altRoot); err != nil {
		log.Panic(err)
	} else {
		prettyPrintf("cd %s\n", altRoot)
	}
	os.Setenv("PWD", altRoot)
	goCmd(nil, "build", "-buildmode=plugin", "-o", filepath.Join(modRoot, "plugin-mismatch.so"), "./plugin-mismatch")

	os.Setenv("GOPATH", GOPATH)
	if err := os.Chdir(modRoot); err != nil {
		log.Panic(err)
	} else {

// duplicate file descriptors.
func dupCloseOnExecOld(fd int) (int, string, error) {
	return -1, "dup", syscall.ENOSYS
}

// Fchdir wraps syscall.Fchdir.
func (fd *FD) Fchdir() error {
	if err := fd.incref(); err != nil {
		return err
	}
	defer fd.decref()
	return syscall.Chdir(fd.Path)
}

// ReadDir wraps syscall.ReadDir.
// We treat this like an ordinary system call rather than a call

	path string
	err  error
	sync.Once
}

func chdir(t *testing.T, dir string) {
	t.Helper()

	prev, err := os.Getwd()
	if err != nil {
		t.Fatal(err)
	}
	if err := os.Chdir(dir); err != nil {
		t.Fatal(err)
	}
	t.Logf("Chdir(%#q)", dir)

	t.Cleanup(func() {
		if err := os.Chdir(prev); err != nil {
			// Couldn't chdir back to the original working directory.

	if err != nil {
		t.Fatalf("chtmpdir: %v", err)
	}
	d, err := os.MkdirTemp("", "test")
	if err != nil {
		t.Fatalf("chtmpdir: %v", err)
	}
	if err := os.Chdir(d); err != nil {
		t.Fatalf("chtmpdir: %v", err)
	}
	return func() {
		if err := os.Chdir(oldwd); err != nil {
			t.Fatalf("chtmpdir: %v", err)
		}
		os.RemoveAll(d)
	}
}

func touch(t *testing.T, name string) {
	f, err := os.Create(name)

/*
 * Exposed directly
 */
//sys	Access(path string, mode uint32) (err error)
//sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
//sys	Chdir(path string) (err error)
//sys	Chflags(path string, flags int) (err error)
//sys	Chmod(path string, mode uint32) (err error)
//sys	Chown(path string, uid int, gid int) (err error)
//sys	Chroot(path string) (err error)

	gopath := filepath.Join(work, "gopath")
	must(s.Setenv("GOPATH", gopath))
	gopathSrc := filepath.Join(gopath, "src")
	must(os.MkdirAll(gopathSrc, 0777))
	must(s.Chdir(gopathSrc))
	return telemetryDir
}

func scriptEnv(srv *vcstest.Server, srvCertFile string) ([]string, error) {
	httpURL, err := url.Parse(srv.HTTP.URL)
	if err != nil {
		return nil, err
	}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Fchdir(fd int) (err error) {
	_, _, e1 := syscall(abi.FuncPCABI0(libc_fchdir_trampoline), uintptr(fd), 0, 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_fchdir_trampoline()

//go:cgo_import_dynamic libc_fchdir fchdir "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

 */

//sys	Acct(path string) (err error)
//sys	Chdir(path string) (err error)
//sys	Chmod(path string, mode uint32) (err error)
//sys	Chown(path string, uid int, gid int) (err error)
//sys	Chroot(path string) (err error)
//sys	Close(fd int) (err error)
//sys	Dup(fd int) (nfd int, err error)
//sys	Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
//sys	Fchdir(fd int) (err error)

		}

		for _, c = range sys.AmbientCaps {
			_, _, err1 = RawSyscall6(SYS_PRCTL, PR_CAP_AMBIENT, uintptr(PR_CAP_AMBIENT_RAISE), c, 0, 0, 0)
			if err1 != 0 {
				goto childerror
			}
		}
	}

	// Chdir
	if dir != nil {
		_, _, err1 = RawSyscall(SYS_CHDIR, uintptr(unsafe.Pointer(dir)), 0, 0)
		if err1 != 0 {
			goto childerror
		}
	}

	// Parent death signal
	if sys.Pdeathsig != 0 {

//go:cgo_import_dynamic libc_Openat openat "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_ptrace64 ptrace64 "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_Acct acct "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_Chdir chdir "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_Chmod chmod "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_Chown chown "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_Chroot chroot "libc.a/shr_64.o"