if cfg.Idle == 0 {
		cfg.Idle = defaultTCPKeepAliveIdle
	}
	if cfg.Interval == 0 {
		cfg.Interval = defaultTCPKeepAliveInterval
	}
	if cfg.Count == 0 {
		cfg.Count = defaultTCPKeepAliveCount
	}

	if cfg.Idle == -1 {
		cfg.Idle = oldCfg.Idle
	}
	// Check out the comment on KeepAliveConfig and the illumos code:

	ver := un.Version[:]
	if runtime.GOOS == "illumos" {
		// Illumos distributions use different formats without a parsable
		// and unified pattern for the Version field while Release level
		// string is guaranteed to be in x.y or x.y.z format regardless of
		// whether the kernel is Solaris or illumos.
		ver = un.Release[:]
	}

	parseNext := func() (n int) {
		for i, c := range ver {

	// being used is extremely unlikely.
	pid := math.MaxInt32
	if runtime.GOOS == "solaris" || runtime.GOOS == "illumos" {
		// Solaris/Illumos have a lower limit, above which wait returns
		// EINVAL (see waitid in usr/src/uts/common/os/exit.c in
		// illumos). This is configurable via sysconf(_SC_MAXPID), but
		// we'll just take the default.
		pid = 30000-1
	}

	p, err := FindProcess(pid)

// go run mksyscall_solaris.go -illumos -tags illumos,amd64 syscall_illumos.go
// Code generated by the command above; see README.md. DO NOT EDIT.

//go:build illumos && amd64

package unix

import (
	"unsafe"
)

//go:cgo_import_dynamic libc_readv readv "libc.so"
//go:cgo_import_dynamic libc_preadv preadv "libc.so"
//go:cgo_import_dynamic libc_writev writev "libc.so"
//go:cgo_import_dynamic libc_pwritev pwritev "libc.so"

//   - 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
//   - openbsd: https://man.openbsd.org/open.2

	// sockcmsg_dragonfly.go
	switch runtime.GOOS {
	case "aix":
		// There is no alignment on AIX.
		salign = 1
	case "darwin", "ios", "illumos", "solaris":
		// NOTE: It seems like 64-bit Darwin, Illumos and Solaris
		// kernels still require 32-bit aligned access to network
		// subsystem.
		if SizeofPtr == 8 {
			salign = 4
		}
	case "netbsd", "openbsd":

const ODirectPlatform = false

// OpenBSD, Windows, and illumos do not support O_DIRECT.
// On Windows there is no documentation on disabling O_DIRECT.
// For these systems we do not attempt to build the 'directio' dependency since
// the O_DIRECT symbol may not be exposed resulting in a failed build.
//
//
// On illumos an explicit O_DIRECT flag is not necessary for two primary

// Copyright 2023 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 || dragonfly || freebsd || illumos || linux || netbsd

package net

import (
	"syscall"
	"testing"
)

const (
	syscall_TCP_KEEPIDLE  = syscall.TCP_KEEPIDLE
	syscall_TCP_KEEPCNT   = syscall.TCP_KEEPCNT
	syscall_TCP_KEEPINTVL = syscall.TCP_KEEPINTVL
)

// Copyright 2021 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.

// illumos system calls not present on Solaris.

//go:build amd64 && illumos

package unix

import (
	"unsafe"
)

func bytes2iovec(bs [][]byte) []Iovec {
	iovecs := make([]Iovec, len(bs))
	for i, b := range bs {
		iovecs[i].SetLen(len(b))
		if len(b) > 0 {

	{"android", "arm64"},
	{"darwin", "amd64"},
	{"darwin", "arm64"},
	{"dragonfly", "amd64"},
	{"freebsd", "386"},
	{"freebsd", "amd64"},
	{"freebsd", "arm"},
	{"freebsd", "arm64"},
	{"freebsd", "riscv64"},
	{"illumos", "amd64"},
	{"ios", "amd64"},
	{"ios", "arm64"},
	{"js", "wasm"},
	{"linux", "386"},
	{"linux", "amd64"},
	{"linux", "arm"},
	{"linux", "arm64"},
	{"linux", "loong64"},
	{"linux", "mips"},