o |= syscall.DMAPPEND
	}
	if i&ModeExclusive != 0 {
		o |= syscall.DMEXCL
	}
	if i&ModeTemporary != 0 {
		o |= syscall.DMTMP
	}
	return
}

// openFileNolog is the Plan 9 implementation of OpenFile.
func openFileNolog(name string, flag int, perm FileMode) (*File, error) {
	var (
		fd     int
		e      error
		create bool
		excl   bool
		trunc  bool
		append bool
	)

//	 Multicast DNS	UTF-8 in RFC 5198 or		<=253 + a NUL terminator
//				the same as unicast DNS ASCII	<=253 + a NUL terminator
//	 Local database	various				depends on implementation
const (
	nameinfoLen    = 64
	maxNameinfoLen = 4096
)

func cgoLookupPTR(ctx context.Context, addr string) (names []string, err error) {
	ip, err := netip.ParseAddr(addr)
	if err != nil {

			funcId := sd[i+coverage.FuncIdOffset].Load()
			cst := i + coverage.FirstCtrOffset
			counters := sd[cst : cst+int(nCtrs)]

			// Check to make sure that we have at least one live
			// counter. See the implementation note in ClearCoverageCounters
			// for a description of why this is needed.
			isLive := false
			for i := 0; i < len(counters); i++ {
				if counters[i].Load() != 0 {
					isLive = true
					break
				}

	< go/importer;

	NET, crypto/rand, mime/quotedprintable
	< mime/multipart;

	crypto/tls
	< net/smtp;

	crypto/rand
	< hash/maphash; # for purego implementation

	# HTTP, King of Dependencies.

	FMT
	< golang.org/x/net/http2/hpack
	< net/http/internal, net/http/internal/ascii, net/http/internal/testcert;

	FMT, NET, container/list, encoding/binary, log

	// a data record for each tile (len(data) == len(tiles))
	// and each data record must be the correct length
	// (len(data[i]) == tiles[i].W*HashSize).
	//
	// An implementation of ReadTiles typically reads
	// them from an on-disk cache or else from a remote
	// tile server. Tile data downloaded from a server should
	// be considered suspect and not saved into a persistent

		sigpipe()
	}
}

// DevNull is the name of the operating system's “null device.”
// On Unix-like systems, it is "/dev/null"; on Windows, "NUL".
const DevNull = "/dev/null"

// openFileNolog is the Unix implementation of OpenFile.
// Changes here should be reflected in openDirAt and openDirNolog, if relevant.
func openFileNolog(name string, flag int, perm FileMode) (*File, error) {
	setSticky := false

func TCPAddrFromAddrPort(addr netip.AddrPort) *TCPAddr {
	return &TCPAddr{
		IP:   addr.Addr().AsSlice(),
		Zone: addr.Addr().Zone(),
		Port: int(addr.Port()),
	}
}

// TCPConn is an implementation of the [Conn] interface for TCP network
// connections.
type TCPConn struct {
	conn
}

// KeepAliveConfig contains TCP keep-alive options.
//

}

// Var defines a flag with the specified name and usage string. The type and
// value of the flag are represented by the first argument, of type [Value], which
// typically holds a user-defined implementation of [Value]. For instance, the
// caller could create a flag that turns a comma-separated string into a slice
// of strings by giving the slice the methods of [Value]; in particular, [Set] would

		if escaped != sh.workDir {
			cmd = strings.ReplaceAll(cmd, escaped, "$WORK")
		}
	}
	return cmd
}

// ShowCmd prints the given command to standard output
// for the implementation of -n or -x.
//
// ShowCmd also replaces the name of the current script directory with dot (.)
// but only when it is at the beginning of a space-separated token.
//

// x and y must have a non-empty mantissa and valid exponent.
func (z *Float) uadd(x, y *Float) {
	// Note: This implementation requires 2 shifts most of the
	// time. It is also inefficient if exponents or precisions
	// differ by wide margins. The following article describes
	// an efficient (but much more complicated) implementation
	// compatible with the internal representation used here:
	//