func packagefile(pkg string) string {
	return pathf("%s/pkg/obj/go-bootstrap/%s_%s/%s.a", goroot, goos, goarch, pkg)
}

// unixOS is the set of GOOS values matched by the "unix" build tag.
// This is the same list as in go/build/syslist.go and
// cmd/go/internal/imports/build.go.
var unixOS = map[string]bool{
	"aix":       true,
	"android":   true,
	"darwin":    true,
	"dragonfly": true,
	"freebsd":   true,

		return true
	}
	if ctxt.GOOS == "illumos" && name == "solaris" {
		return true
	}
	if ctxt.GOOS == "ios" && name == "darwin" {
		return true
	}
	if name == "unix" && unixOS[ctxt.GOOS] {
		return true
	}
	if name == "boringcrypto" {
		name = "goexperiment.boringcrypto" // boringcrypto is an old name for goexperiment.boringcrypto
	}

	// other tags

		return true
	}
	if ctxt.GOOS == "illumos" && name == "solaris" {
		return true
	}
	if ctxt.GOOS == "ios" && name == "darwin" {
		return true
	}
	if name == "unix" && unixOS[ctxt.GOOS] {
		return true
	}
	if name == "boringcrypto" {
		name = "goexperiment.boringcrypto" // boringcrypto is an old name for goexperiment.boringcrypto
	}

	// other tags

	// Replace the temporary file with an actual Unix domain socket file
	os.Remove(testFile)
	ta, err := net.ResolveUnixAddr("unix", testFile)
	require.NoError(t, err, "Failed to ResolveUnixAddr.")
	unixln, err := net.ListenUnix("unix", ta)
	require.NoError(t, err, "Failed to ListenUnix.")

	// Wait for the goroutine to finish, then close the socket
	wg.Wait()
	unixln.Close()
}

func TestAbsWithSlash(t *testing.T) {

// license that can be found in the LICENSE file.

//go:build unix

package runtime

func checkfds() {
	if islibrary || isarchive {
		// If the program is actually a library, presumably being consumed by
		// another program, we don't want to mess around with the file
		// descriptors.
		return
	}

	const (
		// F_GETFD, EBADF, O_RDWR are standard across all unixes we support, so

	// the termios(3) manpage.
	termios.Iflag &^= unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON
	termios.Oflag &^= unix.OPOST
	termios.Lflag &^= unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN
	termios.Cflag &^= unix.CSIZE | unix.PARENB
	termios.Cflag |= unix.CS8
	termios.Cc[unix.VMIN] = 1
	termios.Cc[unix.VTIME] = 0

        assertInvalidUnixPermission("rwxrwx|wx", "'rwxrwx|wx' isn't a proper Unix permission. '|' is not a valid Unix permission READ flag, must be 'r' or '-'.");
        assertInvalidUnixPermission("r|xrwxrwx", "'r|xrwxrwx' isn't a proper Unix permission. '|' is not a valid Unix permission WRITE flag, must be 'w' or '-'.");

			// Enable custom socket send/recv buffers.
			if opts.SendBufSize > 0 {
				_ = unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_SNDBUF, opts.SendBufSize)
			}

			if opts.RecvBufSize > 0 {
				_ = unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_RCVBUF, opts.RecvBufSize)
			}

			// Enable TCP open
			// https://lwn.net/Articles/508865/ - 32k queue size.

package net

import (
	"internal/syscall/unix"
	"runtime"
	"syscall"
	"unsafe"
)

const (
	_C_AF_INET      = syscall.AF_INET
	_C_AF_INET6     = syscall.AF_INET6
	_C_AF_UNSPEC    = syscall.AF_UNSPEC
	_C_EAI_AGAIN    = unix.EAI_AGAIN
	_C_EAI_NONAME   = unix.EAI_NONAME
	_C_EAI_SERVICE  = unix.EAI_SERVICE
	_C_EAI_NODATA   = unix.EAI_NODATA
	_C_EAI_OVERFLOW = unix.EAI_OVERFLOW
	_C_EAI_SYSTEM   = unix.EAI_SYSTEM

	return conn.Control(func(descriptor uintptr) {
		err := unix.SetsockoptInt(int(descriptor), unix.SOL_SOCKET, unix.SO_REUSEADDR, 1)
		if err != nil {
			log.Errorf("Fail to set fd %d SO_REUSEADDR with error %v", descriptor, err)
		}
		err = unix.SetsockoptInt(int(descriptor), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
		if err != nil {