// 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 unix

package goos

	// 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

	var err error
	watchfd, err = unix.Open(fmt.Sprintf("%s/%s", path, attribute), unix.O_RDONLY|unix.O_CLOEXEC, 0)
	if err != nil {
		return nil, err
	}
	defer unix.Close(watchfd)
	controlfd, err = unix.Open(fmt.Sprintf("%s/cgroup.event_control", path), unix.O_WRONLY|unix.O_CLOEXEC, 0)
	if err != nil {
		return nil, err
	}
	defer unix.Close(controlfd)
	eventfd, err = unix.Eventfd(0, unix.EFD_CLOEXEC)
	if err != nil {

//go:build unix

package osinfo

import "golang.org/x/sys/unix"

// Version returns the OS version name/number.
func Version() (string, error) {
	var uts unix.Utsname
	if err := unix.Uname(&uts); err != nil {
		return "", err
	}

	sysname := unix.ByteSliceToString(uts.Sysname[:])
	release := unix.ByteSliceToString(uts.Release[:])
	version := unix.ByteSliceToString(uts.Version[:])

        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 '-'.");

import (
	"fmt"
	"path/filepath"
)

func ExampleSplitList() {
	fmt.Println("On Unix:", filepath.SplitList("/a/b/c:/usr/bin"))
	// Output:
	// On Unix: [/a/b/c /usr/bin]
}

func ExampleRel() {
	paths := []string{
		"/a/b/c",
		"/b/c",
		"./b/c",
	}
	base := "/a"

	fmt.Println("On Unix:")
	for _, p := range paths {
		rel, err := filepath.Rel(base, p)
		fmt.Printf("%q: %q %v\n", p, rel, err)

			// 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.

		{"-1", time.Unix(-1, -0e0+0e0), true},
		{"-1.999000", time.Unix(-1, -1e9+1e6), true},
		{"-1.999999", time.Unix(-1, -1e9+1e3), true},
		{"-1.999999999", time.Unix(-1, -1e9+1e0), true},
		{"0.000000001", time.Unix(0, 1e0+0e0), true},
		{"0.000001", time.Unix(0, 1e3+0e0), true},
		{"0.001000", time.Unix(0, 1e6+0e0), true},
		{"0", time.Unix(0, 0e0), true},
		{"0.999000", time.Unix(0, 1e9-1e6), true},

	var result *_C_struct_group
	errno = unix.Getgrgid(gid, &grp, buf, size, &result)
	return grp, result != nil, errno
}

const (
	_C__SC_GETPW_R_SIZE_MAX = unix.SC_GETPW_R_SIZE_MAX
	_C__SC_GETGR_R_SIZE_MAX = unix.SC_GETGR_R_SIZE_MAX
)

		}
	}
}

func Test_stringToProtocol(t *testing.T) {
	tests := []string{
		"TCP", "UDP", "ICMP", "SCTP",
	}
	expected := []uint16{
		uint16(unix.IPPROTO_TCP), uint16(unix.IPPROTO_UDP), uint16(0), uint16(unix.IPPROTO_SCTP),
	}
	for i := range tests {
		got := stringToProtocol(tests[i])
		if got != expected[i] {
			t.Errorf("stringToProtocol() failed - got %#v, want %#v",