The general form of the GOVCS setting is a comma-separated list of
pattern:vcslist rules. The pattern is a glob pattern that must match
one or more leading elements of the module or import path. The vcslist
is a pipe-separated list of allowed version control commands, or "all"
to allow use of any known command, or "off" to disallow all commands.
Note that if a module matches a pattern with vcslist "off", it may still be

func (f *fakeDNSPacketConn) Close() error {
	return f.fakeDNSConn.Close()
}

// UDP round-tripper algorithm should ignore invalid DNS responses (issue 13281).
func TestIgnoreDNSForgeries(t *testing.T) {
	c, s := Pipe()
	go func() {
		b := make([]byte, maxDNSPacketSize)
		n, err := s.Read(b)
		if err != nil {
			t.Error(err)
			return
		}

		var msg dnsmessage.Message
		if msg.Unpack(b[:n]) != nil {

		// so we print it here. We can't always check whether it was printed
		// because some tests need stdout to be a terminal (golang.org/issue/34791),
		// not a pipe.
		// TODO(golang.org/issue/29062): tests that exit with status 0 without
		// printing a final result should fail.
		prefix := ""
		if testJSON || testV.json {
			prefix = "\x16"
		}

	if int64(r0) == -1 {
		err = errnoErr2(e1, e2)
	}
	return
}

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

func pipe(p *[2]_C_int) (err error) {
	r0, e2, e1 := CallLeFuncWithErr(GetZosLibVec()+SYS_PIPE<<4, uintptr(unsafe.Pointer(p)))
	if int64(r0) == -1 {
		err = errnoErr2(e1, e2)
	}
	return
}