//go:cgo_import_dynamic libc_execve execve "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_fcntl fcntl "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_fork fork "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_ioctl ioctl "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setgid setgid "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setgroups setgroups "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setrlimit setrlimit "libc.a/shr_64.o"

	var as []Addr
	for _, ll := range lls {
		var lifr lifreq
		for i := 0; i < len(ll.Name); i++ {
			lifr.Name[i] = int8(ll.Name[i])
		}
		for _, ep := range eps {
			ioc := int64(syscall.SIOCGLIFADDR)
			err := ioctl(ep.s, uintptr(ioc), unsafe.Pointer(&lifr))
			if err != nil {
				continue
			}
			sa := (*sockaddrStorage)(unsafe.Pointer(&lifr.Lifru[0]))
			l := int(nativeEndian.Uint32(lifr.Lifru1[:4]))
			if l == 0 {
				continue

func (ifr *Ifreq) Name() string {
	return ByteSliceToString(ifr.raw.Ifrn[:])
}

// According to netdevice(7), only AF_INET addresses are returned for numerous
// sockaddr ioctls. For convenience, we expose these as Inet4Addr since the Port
// field and other data is always empty.

// Inet4Addr returns the Ifreq union data from an embedded sockaddr as a C

//	LWS            = [CRLF] 1*( SP | HT )
func isLWS(b byte) bool { return b == ' ' || b == '\t' }

// isCTL reports whether b is a control byte, according
// to http://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2.2
//
//	CTL            = <any US-ASCII control character
//	                 (octets 0 - 31) and DEL (127)>
func isCTL(b byte) bool {
	const del = 0x7f // a CTL
	return b < ' ' || b == del
}