type (
	_C_short     int16
	_C_int       int32
	_C_long      int32
	_C_long_long int64
)

type Timespec struct {
	Sec  int32
	Nsec int32
}

type Timeval struct {
	Sec  int32
	Usec int32
}

type Time_t int32

type Rusage struct {
	Utime    Timeval
	Stime    Timeval
	Maxrss   int32
	Ixrss    int32
	Idrss    int32
	Isrss    int32
	Minflt   int32
	Majflt   int32
	Nswap    int32

)

type PtraceLwpInfoStruct struct {
	Lwpid        int32
	Event        int32
	Flags        int32
	Sigmask      Sigset_t
	Siglist      Sigset_t
	Siginfo      __PtraceSiginfo
	Tdname       [20]int8
	Child_pid    int32
	Syscall_code uint32
	Syscall_narg uint32
}

type __Siginfo struct {
	Signo  int32
	Errno  int32
	Code   int32
	Pid    int32
	Uid    uint32
	Status int32
	Addr   *byte

	Nswap    int32
	Inblock  int32
	Oublock  int32
	Msgsnd   int32
	Msgrcv   int32
	Nsignals int32
	Nvcsw    int32
	Nivcsw   int32
}

type Rlimit struct {
	Cur int64
	Max int64
}

type _Gid_t uint32

const (
	_statfsVersion = 0x20140518
	_dirblksiz     = 0x400
)

type Stat_t struct {
	Dev     uint64
	Ino     uint64
	Nlink   uint64
	Mode    uint16
	_0      int16

func kqueue() int32

//go:noescape
func kevent(kq int32, ch *keventt, nch int32, ev *keventt, nev int32, ts *timespec) int32

func raiseproc(sig uint32)

func getthrid() int32
func thrkill(tid int32, sig int)

// read calls the read system call.
// It returns a non-negative number of bytes written or a negative errno value.
func read(fd int32, p unsafe.Pointer, n int32) int32

	Type      uint8
	Addrs     int32
	Flags     int32
	Index     uint16
	Pad_cgo_0 [2]byte
	Refcount  int32
}

type RtMsghdr struct {
	Msglen    uint16
	Version   uint8
	Type      uint8
	Index     uint16
	Pad_cgo_0 [2]byte
	Flags     int32
	Addrs     int32
	Pid       int32
	Seq       int32
	Errno     int32
	Use       int32
	Inits     uint32
	Rmx       RtMetrics
}

	Ffree     uint64
	Fsid      Fsid64_t
	Vfstype   int32
	Fsize     uint64
	Vfsnumber int32
	Vfsoff    int32
	Vfslen    int32
	Vfsvers   int32
	Fname     [32]uint8
	Fpack     [32]uint8
	Name_max  int32
	_         [4]byte
}

type (
	_C_short     int16
	_C_int       int32
	_C_long      int32
	_C_long_long int64
)

type Timespec struct {
	Sec  int64
	Nsec int32
}

type Timeval struct {
	Sec  int64
	Usec int32
}

type Rusage struct {
	Utime    Timeval
	Stime    Timeval
	Maxrss   int32
	Ixrss    int32
	Idrss    int32
	Isrss    int32
	Minflt   int32
	Majflt   int32
	Nswap    int32
	Inblock  int32

type (
	_C_short     int16
	_C_int       int32
	_C_long      int32
	_C_long_long int64
)

type Timespec struct {
	Sec  int64
	Nsec int32
}

type Timeval struct {
	Sec  int64
	Usec int32
}

type Rusage struct {
	Utime    Timeval
	Stime    Timeval
	Maxrss   int32
	Ixrss    int32
	Idrss    int32
	Isrss    int32
	Minflt   int32
	Majflt   int32
	Nswap    int32
	Inblock  int32

	Nswap    int32
	Inblock  int32
	Oublock  int32
	Msgsnd   int32
	Msgrcv   int32
	Nsignals int32
	Nvcsw    int32
	Nivcsw   int32
}

type Rlimit struct {
	Cur uint64
	Max uint64
}

type _Gid_t uint32

type Stat_t struct {
	Dev     uint64
	Mode    uint32
	_       [4]byte
	Ino     uint64
	Nlink   uint32
	Uid     uint32
	Gid     uint32
	_       [4]byte
	Rdev    uint64

func pipe2(flags int32) (r, w int32, errno int32)
func fcntl(fd, cmd, arg int32) (ret int32, errno int32)

func issetugid() int32

// From DragonFly's <sys/sysctl.h>
const (
	_CTL_HW      = 6
	_HW_NCPU     = 3
	_HW_PAGESIZE = 7
)

var sigset_all = sigset{[4]uint32{^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)}}

func getncpu() int32 {
	mib := [2]uint32{_CTL_HW, _HW_NCPU}