//   - android: see linux
//   - darwin: https://github.com/apple/darwin-xnu/blob/main/bsd/man/man2/open.2
//   - hurd: who knows if it works at all (https://www.gnu.org/software/hurd/open_issues/open_symlink.html)
//   - illumos: https://illumos.org/man/2/open
//   - ios: see darwin
//   - linux: https://man7.org/linux/man-pages/man2/openat.2.html

		// package net of the standard library.
		switch runtime.GOOS {
		case "android", "fuchsia", "hurd", "ios", "js", "nacl", "plan9", "wasip1", "windows":
			return false
		}
	case "ip", "ip4", "ip6":
		switch runtime.GOOS {
		case "fuchsia", "hurd", "js", "nacl", "plan9", "wasip1":
			return false
		default:
			if os.Getuid() != 0 {
				return false
			}
		}

// Copyright 2022 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 hurd

package unix

/*
#include <stdint.h>
int ioctl(int, unsigned long int, uintptr_t);
*/
import "C"

func ioctl(fd int, req uint, arg uintptr) (err error) {
	r0, er := C.ioctl(C.int(fd), C.ulong(req), C.uintptr_t(arg))
	if r0 == -1 && er != nil {
		err = er

// Copyright 2022 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 386 && hurd

package unix

const (
	TIOCGETA = 0x62251713
)

type Winsize struct {
	Row    uint16
	Col    uint16
	Xpixel uint16
	Ypixel uint16
}

type Termios struct {
	Iflag  uint32
	Oflag  uint32
	Cflag  uint32
	Lflag  uint32

// 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 gccgo && !aix && !hurd

#include <errno.h>
#include <stdint.h>
#include <unistd.h>

#define _STRINGIFY2_(x) #x
#define _STRINGIFY_(x) _STRINGIFY2_(x)
#define GOSYM_PREFIX _STRINGIFY_(__USER_LABEL_PREFIX__)

// Call syscall from C code because the gccgo support for calling from

// 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 gccgo && !aix && !hurd

package unix

import "syscall"

// We can't use the gc-syntax .s files for gccgo. On the plus side
// much of the functionality can be written directly in Go.

func realSyscallNoError(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r uintptr)

// Copyright 2018 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 || hurd || linux || netbsd || openbsd

package unix

import (
	"unsafe"
)

// ioctl itself should not be exposed directly, but additional get/set
// functions for specific types are permissible.

	// concurrentPushLimit is a semaphore that limits the amount of concurrent XDS pushes.
	concurrentPushLimit chan struct{}
	// RequestRateLimit limits the number of new XDS requests allowed. This helps prevent thundering hurd of incoming requests.
	RequestRateLimit *rate.Limiter

	// InboundUpdates describes the number of configuration updates the discovery server has received
	InboundUpdates *atomic.Int64

// cmd/go/internal/imports/build.go.
var unixOS = map[string]bool{
	"aix":       true,
	"android":   true,
	"darwin":    true,
	"dragonfly": true,
	"freebsd":   true,
	"hurd":      true,
	"illumos":   true,
	"ios":       true,
	"linux":     true,
	"netbsd":    true,
	"openbsd":   true,
	"solaris":   true,
}

// matchtag reports whether the tag matches this build.

	ELFOSABI_HPUX       OSABI = 1   /* HP-UX operating system */
	ELFOSABI_NETBSD     OSABI = 2   /* NetBSD */
	ELFOSABI_LINUX      OSABI = 3   /* Linux */
	ELFOSABI_HURD       OSABI = 4   /* Hurd */
	ELFOSABI_86OPEN     OSABI = 5   /* 86Open common IA32 ABI */
	ELFOSABI_SOLARIS    OSABI = 6   /* Solaris */
	ELFOSABI_AIX        OSABI = 7   /* AIX */
	ELFOSABI_IRIX       OSABI = 8   /* IRIX */