// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build darwin || dragonfly || freebsd || (linux && !android) || netbsd || openbsd

package os_test

import (
	"errors"
	"internal/syscall/unix"
	"internal/testenv"
	"io"
	"io/fs"
	"os"
	"path/filepath"
	"strconv"
	"sync"
	"syscall"
	"testing"
	"time"
)

		case "darwin", "ios", "dragonfly", "freebsd", "netbsd", "openbsd":
			var st syscall.Stat_t
			err := ignoringEINTR(func() error {
				return syscall.Fstat(fd, &st)
			})
			typ := st.Mode & syscall.S_IFMT
			// Don't try to use kqueue with regular files on *BSDs.
			// On FreeBSD a regular file is always
			// reported as ready for writing.
			// On Dragonfly, NetBSD and OpenBSD the fd is signaled

// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build aix || darwin || netbsd || openbsd || plan9 || solaris || windows

package runtime

import (
	"internal/runtime/atomic"
	"unsafe"
)

// This implementation depends on OS-specific implementations of
//
//	func semacreate(mp *m)

	switch goos {
	case "linux":
		return goarch == "amd64" || goarch == "ppc64le" || goarch == "arm64" || goarch == "s390x"
	case "darwin":
		return goarch == "amd64" || goarch == "arm64"
	case "freebsd", "netbsd", "windows":
		return goarch == "amd64"
	default:
		return false
	}
}

// MSanSupported reports whether goos/goarch supports the memory
// sanitizer option.
func MSanSupported(goos, goarch string) bool {

import (
	"errors"
	"internal/itoa"
	"sync"
	"time"
	_ "unsafe"
)

// BUG(mikio): On JS, methods and functions related to
// Interface are not implemented.

// BUG(mikio): On AIX, DragonFly BSD, NetBSD, OpenBSD, Plan 9 and
// Solaris, the MulticastAddrs method of Interface is not implemented.

// errNoSuchInterface should be an internal detail,
// but widely used packages access it using linkname.

var trailingPort = regexp.MustCompile(`:([0-9]+)$`)

var osDefaultInheritEnv = func() []string {
	switch runtime.GOOS {
	case "darwin", "ios":
		return []string{"DYLD_LIBRARY_PATH"}
	case "android", "linux", "freebsd", "netbsd", "openbsd":
		return []string{"LD_LIBRARY_PATH"}
	case "hpux":
		return []string{"LD_LIBRARY_PATH", "SHLIB_PATH"}
	case "irix":
		return []string{"LD_LIBRARY_PATH", "LD_LIBRARYN32_PATH", "LD_LIBRARY64_PATH"}

// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build (darwin || dragonfly || freebsd || (linux && !android) || netbsd || openbsd) && cgo

// Note that this test does not work on Solaris: issue #22849.
// Don't run the test on Android because at least some versions of the
// C library do not define the posix_openpt function.

package signal_test

	"sync"
	"unsafe"
)

var (
	Stdin  = 0
	Stdout = 1
	Stderr = 2
)

const (
	darwin64Bit = (runtime.GOOS == "darwin" || runtime.GOOS == "ios") && sizeofPtr == 8
	netbsd32Bit = runtime.GOOS == "netbsd" && sizeofPtr == 4
)

// clen returns the index of the first NULL byte in n or len(n) if n contains no NULL byte.
func clen(n []byte) int {
	if i := bytealg.IndexByte(n, 0); i != -1 {
		return i
	}
	return len(n)

		t.Fatalf("Lstat %q succeeded after RemoveAll", path)
	}
}

func TestRemoveAllLongPath(t *testing.T) {
	switch runtime.GOOS {
	case "aix", "darwin", "ios", "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "illumos", "solaris":
		break
	default:
		t.Skip("skipping for not implemented platforms")
	}

	prevDir, err := Getwd()
	if err != nil {
		t.Fatalf("Could not get wd: %s", err)
	}

// timeoutUpperBound returns the maximum time that we expect a timeout of
// duration d to take to return the caller.
func timeoutUpperBound(d time.Duration) time.Duration {
	switch runtime.GOOS {
	case "openbsd", "netbsd":
		// NetBSD and OpenBSD seem to be unable to reliably hit deadlines even when
		// the absolute durations are long.
		// In https://build.golang.org/log/c34f8685d020b98377dd4988cd38f0c5bd72267e,