usb-ks

USB Killswitch
git clone git://git.laack.co/usb-ks.git
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syscall_freebsd.go (24865B)


      1 // Copyright 2009,2010 The Go Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 // FreeBSD system calls.
      6 // This file is compiled as ordinary Go code,
      7 // but it is also input to mksyscall,
      8 // which parses the //sys lines and generates system call stubs.
      9 // Note that sometimes we use a lowercase //sys name and wrap
     10 // it in our own nicer implementation, either here or in
     11 // syscall_bsd.go or syscall_unix.go.
     12 
     13 package unix
     14 
     15 import (
     16 	"sync"
     17 	"unsafe"
     18 )
     19 
     20 const (
     21 	SYS_FSTAT_FREEBSD12         = 551 // { int fstat(int fd, _Out_ struct stat *sb); }
     22 	SYS_FSTATAT_FREEBSD12       = 552 // { int fstatat(int fd, _In_z_ char *path, \
     23 	SYS_GETDIRENTRIES_FREEBSD12 = 554 // { ssize_t getdirentries(int fd, \
     24 	SYS_STATFS_FREEBSD12        = 555 // { int statfs(_In_z_ char *path, \
     25 	SYS_FSTATFS_FREEBSD12       = 556 // { int fstatfs(int fd, \
     26 	SYS_GETFSSTAT_FREEBSD12     = 557 // { int getfsstat( \
     27 	SYS_MKNODAT_FREEBSD12       = 559 // { int mknodat(int fd, _In_z_ char *path, \
     28 )
     29 
     30 // See https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/versions.html.
     31 var (
     32 	osreldateOnce sync.Once
     33 	osreldate     uint32
     34 )
     35 
     36 // INO64_FIRST from /usr/src/lib/libc/sys/compat-ino64.h
     37 const _ino64First = 1200031
     38 
     39 func supportsABI(ver uint32) bool {
     40 	osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
     41 	return osreldate >= ver
     42 }
     43 
     44 // SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
     45 type SockaddrDatalink struct {
     46 	Len    uint8
     47 	Family uint8
     48 	Index  uint16
     49 	Type   uint8
     50 	Nlen   uint8
     51 	Alen   uint8
     52 	Slen   uint8
     53 	Data   [46]int8
     54 	raw    RawSockaddrDatalink
     55 }
     56 
     57 func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
     58 	return nil, EAFNOSUPPORT
     59 }
     60 
     61 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
     62 func nametomib(name string) (mib []_C_int, err error) {
     63 	const siz = unsafe.Sizeof(mib[0])
     64 
     65 	// NOTE(rsc): It seems strange to set the buffer to have
     66 	// size CTL_MAXNAME+2 but use only CTL_MAXNAME
     67 	// as the size. I don't know why the +2 is here, but the
     68 	// kernel uses +2 for its own implementation of this function.
     69 	// I am scared that if we don't include the +2 here, the kernel
     70 	// will silently write 2 words farther than we specify
     71 	// and we'll get memory corruption.
     72 	var buf [CTL_MAXNAME + 2]_C_int
     73 	n := uintptr(CTL_MAXNAME) * siz
     74 
     75 	p := (*byte)(unsafe.Pointer(&buf[0]))
     76 	bytes, err := ByteSliceFromString(name)
     77 	if err != nil {
     78 		return nil, err
     79 	}
     80 
     81 	// Magic sysctl: "setting" 0.3 to a string name
     82 	// lets you read back the array of integers form.
     83 	if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
     84 		return nil, err
     85 	}
     86 	return buf[0 : n/siz], nil
     87 }
     88 
     89 func direntIno(buf []byte) (uint64, bool) {
     90 	return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
     91 }
     92 
     93 func direntReclen(buf []byte) (uint64, bool) {
     94 	return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
     95 }
     96 
     97 func direntNamlen(buf []byte) (uint64, bool) {
     98 	return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
     99 }
    100 
    101 func Pipe(p []int) (err error) {
    102 	return Pipe2(p, 0)
    103 }
    104 
    105 //sysnb	pipe2(p *[2]_C_int, flags int) (err error)
    106 
    107 func Pipe2(p []int, flags int) error {
    108 	if len(p) != 2 {
    109 		return EINVAL
    110 	}
    111 	var pp [2]_C_int
    112 	err := pipe2(&pp, flags)
    113 	if err == nil {
    114 		p[0] = int(pp[0])
    115 		p[1] = int(pp[1])
    116 	}
    117 	return err
    118 }
    119 
    120 func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {
    121 	var value IPMreqn
    122 	vallen := _Socklen(SizeofIPMreqn)
    123 	errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
    124 	return &value, errno
    125 }
    126 
    127 func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {
    128 	return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
    129 }
    130 
    131 // GetsockoptXucred is a getsockopt wrapper that returns an Xucred struct.
    132 // The usual level and opt are SOL_LOCAL and LOCAL_PEERCRED, respectively.
    133 func GetsockoptXucred(fd, level, opt int) (*Xucred, error) {
    134 	x := new(Xucred)
    135 	vallen := _Socklen(SizeofXucred)
    136 	err := getsockopt(fd, level, opt, unsafe.Pointer(x), &vallen)
    137 	return x, err
    138 }
    139 
    140 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
    141 	var rsa RawSockaddrAny
    142 	var len _Socklen = SizeofSockaddrAny
    143 	nfd, err = accept4(fd, &rsa, &len, flags)
    144 	if err != nil {
    145 		return
    146 	}
    147 	if len > SizeofSockaddrAny {
    148 		panic("RawSockaddrAny too small")
    149 	}
    150 	sa, err = anyToSockaddr(fd, &rsa)
    151 	if err != nil {
    152 		Close(nfd)
    153 		nfd = 0
    154 	}
    155 	return
    156 }
    157 
    158 //sys	Getcwd(buf []byte) (n int, err error) = SYS___GETCWD
    159 
    160 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
    161 	var (
    162 		_p0          unsafe.Pointer
    163 		bufsize      uintptr
    164 		oldBuf       []statfs_freebsd11_t
    165 		needsConvert bool
    166 	)
    167 
    168 	if len(buf) > 0 {
    169 		if supportsABI(_ino64First) {
    170 			_p0 = unsafe.Pointer(&buf[0])
    171 			bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
    172 		} else {
    173 			n := len(buf)
    174 			oldBuf = make([]statfs_freebsd11_t, n)
    175 			_p0 = unsafe.Pointer(&oldBuf[0])
    176 			bufsize = unsafe.Sizeof(statfs_freebsd11_t{}) * uintptr(n)
    177 			needsConvert = true
    178 		}
    179 	}
    180 	var sysno uintptr = SYS_GETFSSTAT
    181 	if supportsABI(_ino64First) {
    182 		sysno = SYS_GETFSSTAT_FREEBSD12
    183 	}
    184 	r0, _, e1 := Syscall(sysno, uintptr(_p0), bufsize, uintptr(flags))
    185 	n = int(r0)
    186 	if e1 != 0 {
    187 		err = e1
    188 	}
    189 	if e1 == 0 && needsConvert {
    190 		for i := range oldBuf {
    191 			buf[i].convertFrom(&oldBuf[i])
    192 		}
    193 	}
    194 	return
    195 }
    196 
    197 //sys	ioctl(fd int, req uint, arg uintptr) (err error)
    198 
    199 //sys	sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
    200 
    201 func Uname(uname *Utsname) error {
    202 	mib := []_C_int{CTL_KERN, KERN_OSTYPE}
    203 	n := unsafe.Sizeof(uname.Sysname)
    204 	if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil {
    205 		return err
    206 	}
    207 
    208 	mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
    209 	n = unsafe.Sizeof(uname.Nodename)
    210 	if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil {
    211 		return err
    212 	}
    213 
    214 	mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
    215 	n = unsafe.Sizeof(uname.Release)
    216 	if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil {
    217 		return err
    218 	}
    219 
    220 	mib = []_C_int{CTL_KERN, KERN_VERSION}
    221 	n = unsafe.Sizeof(uname.Version)
    222 	if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil {
    223 		return err
    224 	}
    225 
    226 	// The version might have newlines or tabs in it, convert them to
    227 	// spaces.
    228 	for i, b := range uname.Version {
    229 		if b == '\n' || b == '\t' {
    230 			if i == len(uname.Version)-1 {
    231 				uname.Version[i] = 0
    232 			} else {
    233 				uname.Version[i] = ' '
    234 			}
    235 		}
    236 	}
    237 
    238 	mib = []_C_int{CTL_HW, HW_MACHINE}
    239 	n = unsafe.Sizeof(uname.Machine)
    240 	if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil {
    241 		return err
    242 	}
    243 
    244 	return nil
    245 }
    246 
    247 func Stat(path string, st *Stat_t) (err error) {
    248 	var oldStat stat_freebsd11_t
    249 	if supportsABI(_ino64First) {
    250 		return fstatat_freebsd12(AT_FDCWD, path, st, 0)
    251 	}
    252 	err = stat(path, &oldStat)
    253 	if err != nil {
    254 		return err
    255 	}
    256 
    257 	st.convertFrom(&oldStat)
    258 	return nil
    259 }
    260 
    261 func Lstat(path string, st *Stat_t) (err error) {
    262 	var oldStat stat_freebsd11_t
    263 	if supportsABI(_ino64First) {
    264 		return fstatat_freebsd12(AT_FDCWD, path, st, AT_SYMLINK_NOFOLLOW)
    265 	}
    266 	err = lstat(path, &oldStat)
    267 	if err != nil {
    268 		return err
    269 	}
    270 
    271 	st.convertFrom(&oldStat)
    272 	return nil
    273 }
    274 
    275 func Fstat(fd int, st *Stat_t) (err error) {
    276 	var oldStat stat_freebsd11_t
    277 	if supportsABI(_ino64First) {
    278 		return fstat_freebsd12(fd, st)
    279 	}
    280 	err = fstat(fd, &oldStat)
    281 	if err != nil {
    282 		return err
    283 	}
    284 
    285 	st.convertFrom(&oldStat)
    286 	return nil
    287 }
    288 
    289 func Fstatat(fd int, path string, st *Stat_t, flags int) (err error) {
    290 	var oldStat stat_freebsd11_t
    291 	if supportsABI(_ino64First) {
    292 		return fstatat_freebsd12(fd, path, st, flags)
    293 	}
    294 	err = fstatat(fd, path, &oldStat, flags)
    295 	if err != nil {
    296 		return err
    297 	}
    298 
    299 	st.convertFrom(&oldStat)
    300 	return nil
    301 }
    302 
    303 func Statfs(path string, st *Statfs_t) (err error) {
    304 	var oldStatfs statfs_freebsd11_t
    305 	if supportsABI(_ino64First) {
    306 		return statfs_freebsd12(path, st)
    307 	}
    308 	err = statfs(path, &oldStatfs)
    309 	if err != nil {
    310 		return err
    311 	}
    312 
    313 	st.convertFrom(&oldStatfs)
    314 	return nil
    315 }
    316 
    317 func Fstatfs(fd int, st *Statfs_t) (err error) {
    318 	var oldStatfs statfs_freebsd11_t
    319 	if supportsABI(_ino64First) {
    320 		return fstatfs_freebsd12(fd, st)
    321 	}
    322 	err = fstatfs(fd, &oldStatfs)
    323 	if err != nil {
    324 		return err
    325 	}
    326 
    327 	st.convertFrom(&oldStatfs)
    328 	return nil
    329 }
    330 
    331 func Getdents(fd int, buf []byte) (n int, err error) {
    332 	return Getdirentries(fd, buf, nil)
    333 }
    334 
    335 func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
    336 	if supportsABI(_ino64First) {
    337 		if basep == nil || unsafe.Sizeof(*basep) == 8 {
    338 			return getdirentries_freebsd12(fd, buf, (*uint64)(unsafe.Pointer(basep)))
    339 		}
    340 		// The freebsd12 syscall needs a 64-bit base. On 32-bit machines
    341 		// we can't just use the basep passed in. See #32498.
    342 		var base uint64 = uint64(*basep)
    343 		n, err = getdirentries_freebsd12(fd, buf, &base)
    344 		*basep = uintptr(base)
    345 		if base>>32 != 0 {
    346 			// We can't stuff the base back into a uintptr, so any
    347 			// future calls would be suspect. Generate an error.
    348 			// EIO is allowed by getdirentries.
    349 			err = EIO
    350 		}
    351 		return
    352 	}
    353 
    354 	// The old syscall entries are smaller than the new. Use 1/4 of the original
    355 	// buffer size rounded up to DIRBLKSIZ (see /usr/src/lib/libc/sys/getdirentries.c).
    356 	oldBufLen := roundup(len(buf)/4, _dirblksiz)
    357 	oldBuf := make([]byte, oldBufLen)
    358 	n, err = getdirentries(fd, oldBuf, basep)
    359 	if err == nil && n > 0 {
    360 		n = convertFromDirents11(buf, oldBuf[:n])
    361 	}
    362 	return
    363 }
    364 
    365 func Mknod(path string, mode uint32, dev uint64) (err error) {
    366 	var oldDev int
    367 	if supportsABI(_ino64First) {
    368 		return mknodat_freebsd12(AT_FDCWD, path, mode, dev)
    369 	}
    370 	oldDev = int(dev)
    371 	return mknod(path, mode, oldDev)
    372 }
    373 
    374 func Mknodat(fd int, path string, mode uint32, dev uint64) (err error) {
    375 	var oldDev int
    376 	if supportsABI(_ino64First) {
    377 		return mknodat_freebsd12(fd, path, mode, dev)
    378 	}
    379 	oldDev = int(dev)
    380 	return mknodat(fd, path, mode, oldDev)
    381 }
    382 
    383 // round x to the nearest multiple of y, larger or equal to x.
    384 //
    385 // from /usr/include/sys/param.h Macros for counting and rounding.
    386 // #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
    387 func roundup(x, y int) int {
    388 	return ((x + y - 1) / y) * y
    389 }
    390 
    391 func (s *Stat_t) convertFrom(old *stat_freebsd11_t) {
    392 	*s = Stat_t{
    393 		Dev:     uint64(old.Dev),
    394 		Ino:     uint64(old.Ino),
    395 		Nlink:   uint64(old.Nlink),
    396 		Mode:    old.Mode,
    397 		Uid:     old.Uid,
    398 		Gid:     old.Gid,
    399 		Rdev:    uint64(old.Rdev),
    400 		Atim:    old.Atim,
    401 		Mtim:    old.Mtim,
    402 		Ctim:    old.Ctim,
    403 		Btim:    old.Btim,
    404 		Size:    old.Size,
    405 		Blocks:  old.Blocks,
    406 		Blksize: old.Blksize,
    407 		Flags:   old.Flags,
    408 		Gen:     uint64(old.Gen),
    409 	}
    410 }
    411 
    412 func (s *Statfs_t) convertFrom(old *statfs_freebsd11_t) {
    413 	*s = Statfs_t{
    414 		Version:     _statfsVersion,
    415 		Type:        old.Type,
    416 		Flags:       old.Flags,
    417 		Bsize:       old.Bsize,
    418 		Iosize:      old.Iosize,
    419 		Blocks:      old.Blocks,
    420 		Bfree:       old.Bfree,
    421 		Bavail:      old.Bavail,
    422 		Files:       old.Files,
    423 		Ffree:       old.Ffree,
    424 		Syncwrites:  old.Syncwrites,
    425 		Asyncwrites: old.Asyncwrites,
    426 		Syncreads:   old.Syncreads,
    427 		Asyncreads:  old.Asyncreads,
    428 		// Spare
    429 		Namemax: old.Namemax,
    430 		Owner:   old.Owner,
    431 		Fsid:    old.Fsid,
    432 		// Charspare
    433 		// Fstypename
    434 		// Mntfromname
    435 		// Mntonname
    436 	}
    437 
    438 	sl := old.Fstypename[:]
    439 	n := clen(*(*[]byte)(unsafe.Pointer(&sl)))
    440 	copy(s.Fstypename[:], old.Fstypename[:n])
    441 
    442 	sl = old.Mntfromname[:]
    443 	n = clen(*(*[]byte)(unsafe.Pointer(&sl)))
    444 	copy(s.Mntfromname[:], old.Mntfromname[:n])
    445 
    446 	sl = old.Mntonname[:]
    447 	n = clen(*(*[]byte)(unsafe.Pointer(&sl)))
    448 	copy(s.Mntonname[:], old.Mntonname[:n])
    449 }
    450 
    451 func convertFromDirents11(buf []byte, old []byte) int {
    452 	const (
    453 		fixedSize    = int(unsafe.Offsetof(Dirent{}.Name))
    454 		oldFixedSize = int(unsafe.Offsetof(dirent_freebsd11{}.Name))
    455 	)
    456 
    457 	dstPos := 0
    458 	srcPos := 0
    459 	for dstPos+fixedSize < len(buf) && srcPos+oldFixedSize < len(old) {
    460 		var dstDirent Dirent
    461 		var srcDirent dirent_freebsd11
    462 
    463 		// If multiple direntries are written, sometimes when we reach the final one,
    464 		// we may have cap of old less than size of dirent_freebsd11.
    465 		copy((*[unsafe.Sizeof(srcDirent)]byte)(unsafe.Pointer(&srcDirent))[:], old[srcPos:])
    466 
    467 		reclen := roundup(fixedSize+int(srcDirent.Namlen)+1, 8)
    468 		if dstPos+reclen > len(buf) {
    469 			break
    470 		}
    471 
    472 		dstDirent.Fileno = uint64(srcDirent.Fileno)
    473 		dstDirent.Off = 0
    474 		dstDirent.Reclen = uint16(reclen)
    475 		dstDirent.Type = srcDirent.Type
    476 		dstDirent.Pad0 = 0
    477 		dstDirent.Namlen = uint16(srcDirent.Namlen)
    478 		dstDirent.Pad1 = 0
    479 
    480 		copy(dstDirent.Name[:], srcDirent.Name[:srcDirent.Namlen])
    481 		copy(buf[dstPos:], (*[unsafe.Sizeof(dstDirent)]byte)(unsafe.Pointer(&dstDirent))[:])
    482 		padding := buf[dstPos+fixedSize+int(dstDirent.Namlen) : dstPos+reclen]
    483 		for i := range padding {
    484 			padding[i] = 0
    485 		}
    486 
    487 		dstPos += int(dstDirent.Reclen)
    488 		srcPos += int(srcDirent.Reclen)
    489 	}
    490 
    491 	return dstPos
    492 }
    493 
    494 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
    495 	if raceenabled {
    496 		raceReleaseMerge(unsafe.Pointer(&ioSync))
    497 	}
    498 	return sendfile(outfd, infd, offset, count)
    499 }
    500 
    501 //sys	ptrace(request int, pid int, addr uintptr, data int) (err error)
    502 
    503 func PtraceAttach(pid int) (err error) {
    504 	return ptrace(PTRACE_ATTACH, pid, 0, 0)
    505 }
    506 
    507 func PtraceCont(pid int, signal int) (err error) {
    508 	return ptrace(PTRACE_CONT, pid, 1, signal)
    509 }
    510 
    511 func PtraceDetach(pid int) (err error) {
    512 	return ptrace(PTRACE_DETACH, pid, 1, 0)
    513 }
    514 
    515 func PtraceGetFpRegs(pid int, fpregsout *FpReg) (err error) {
    516 	return ptrace(PTRACE_GETFPREGS, pid, uintptr(unsafe.Pointer(fpregsout)), 0)
    517 }
    518 
    519 func PtraceGetRegs(pid int, regsout *Reg) (err error) {
    520 	return ptrace(PTRACE_GETREGS, pid, uintptr(unsafe.Pointer(regsout)), 0)
    521 }
    522 
    523 func PtraceLwpEvents(pid int, enable int) (err error) {
    524 	return ptrace(PTRACE_LWPEVENTS, pid, 0, enable)
    525 }
    526 
    527 func PtraceLwpInfo(pid int, info uintptr) (err error) {
    528 	return ptrace(PTRACE_LWPINFO, pid, info, int(unsafe.Sizeof(PtraceLwpInfoStruct{})))
    529 }
    530 
    531 func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) {
    532 	return PtraceIO(PIOD_READ_D, pid, addr, out, SizeofLong)
    533 }
    534 
    535 func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) {
    536 	return PtraceIO(PIOD_READ_I, pid, addr, out, SizeofLong)
    537 }
    538 
    539 func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) {
    540 	return PtraceIO(PIOD_WRITE_D, pid, addr, data, SizeofLong)
    541 }
    542 
    543 func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) {
    544 	return PtraceIO(PIOD_WRITE_I, pid, addr, data, SizeofLong)
    545 }
    546 
    547 func PtraceSetRegs(pid int, regs *Reg) (err error) {
    548 	return ptrace(PTRACE_SETREGS, pid, uintptr(unsafe.Pointer(regs)), 0)
    549 }
    550 
    551 func PtraceSingleStep(pid int) (err error) {
    552 	return ptrace(PTRACE_SINGLESTEP, pid, 1, 0)
    553 }
    554 
    555 /*
    556  * Exposed directly
    557  */
    558 //sys	Access(path string, mode uint32) (err error)
    559 //sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
    560 //sys	CapEnter() (err error)
    561 //sys	capRightsGet(version int, fd int, rightsp *CapRights) (err error) = SYS___CAP_RIGHTS_GET
    562 //sys	capRightsLimit(fd int, rightsp *CapRights) (err error)
    563 //sys	Chdir(path string) (err error)
    564 //sys	Chflags(path string, flags int) (err error)
    565 //sys	Chmod(path string, mode uint32) (err error)
    566 //sys	Chown(path string, uid int, gid int) (err error)
    567 //sys	Chroot(path string) (err error)
    568 //sys	Close(fd int) (err error)
    569 //sys	Dup(fd int) (nfd int, err error)
    570 //sys	Dup2(from int, to int) (err error)
    571 //sys	Exit(code int)
    572 //sys	ExtattrGetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
    573 //sys	ExtattrSetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
    574 //sys	ExtattrDeleteFd(fd int, attrnamespace int, attrname string) (err error)
    575 //sys	ExtattrListFd(fd int, attrnamespace int, data uintptr, nbytes int) (ret int, err error)
    576 //sys	ExtattrGetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
    577 //sys	ExtattrSetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
    578 //sys	ExtattrDeleteFile(file string, attrnamespace int, attrname string) (err error)
    579 //sys	ExtattrListFile(file string, attrnamespace int, data uintptr, nbytes int) (ret int, err error)
    580 //sys	ExtattrGetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
    581 //sys	ExtattrSetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error)
    582 //sys	ExtattrDeleteLink(link string, attrnamespace int, attrname string) (err error)
    583 //sys	ExtattrListLink(link string, attrnamespace int, data uintptr, nbytes int) (ret int, err error)
    584 //sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_POSIX_FADVISE
    585 //sys	Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
    586 //sys	Fchdir(fd int) (err error)
    587 //sys	Fchflags(fd int, flags int) (err error)
    588 //sys	Fchmod(fd int, mode uint32) (err error)
    589 //sys	Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
    590 //sys	Fchown(fd int, uid int, gid int) (err error)
    591 //sys	Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
    592 //sys	Flock(fd int, how int) (err error)
    593 //sys	Fpathconf(fd int, name int) (val int, err error)
    594 //sys	fstat(fd int, stat *stat_freebsd11_t) (err error)
    595 //sys	fstat_freebsd12(fd int, stat *Stat_t) (err error)
    596 //sys	fstatat(fd int, path string, stat *stat_freebsd11_t, flags int) (err error)
    597 //sys	fstatat_freebsd12(fd int, path string, stat *Stat_t, flags int) (err error)
    598 //sys	fstatfs(fd int, stat *statfs_freebsd11_t) (err error)
    599 //sys	fstatfs_freebsd12(fd int, stat *Statfs_t) (err error)
    600 //sys	Fsync(fd int) (err error)
    601 //sys	Ftruncate(fd int, length int64) (err error)
    602 //sys	getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error)
    603 //sys	getdirentries_freebsd12(fd int, buf []byte, basep *uint64) (n int, err error)
    604 //sys	Getdtablesize() (size int)
    605 //sysnb	Getegid() (egid int)
    606 //sysnb	Geteuid() (uid int)
    607 //sysnb	Getgid() (gid int)
    608 //sysnb	Getpgid(pid int) (pgid int, err error)
    609 //sysnb	Getpgrp() (pgrp int)
    610 //sysnb	Getpid() (pid int)
    611 //sysnb	Getppid() (ppid int)
    612 //sys	Getpriority(which int, who int) (prio int, err error)
    613 //sysnb	Getrlimit(which int, lim *Rlimit) (err error)
    614 //sysnb	Getrusage(who int, rusage *Rusage) (err error)
    615 //sysnb	Getsid(pid int) (sid int, err error)
    616 //sysnb	Gettimeofday(tv *Timeval) (err error)
    617 //sysnb	Getuid() (uid int)
    618 //sys	Issetugid() (tainted bool)
    619 //sys	Kill(pid int, signum syscall.Signal) (err error)
    620 //sys	Kqueue() (fd int, err error)
    621 //sys	Lchown(path string, uid int, gid int) (err error)
    622 //sys	Link(path string, link string) (err error)
    623 //sys	Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)
    624 //sys	Listen(s int, backlog int) (err error)
    625 //sys	lstat(path string, stat *stat_freebsd11_t) (err error)
    626 //sys	Mkdir(path string, mode uint32) (err error)
    627 //sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
    628 //sys	Mkfifo(path string, mode uint32) (err error)
    629 //sys	mknod(path string, mode uint32, dev int) (err error)
    630 //sys	mknodat(fd int, path string, mode uint32, dev int) (err error)
    631 //sys	mknodat_freebsd12(fd int, path string, mode uint32, dev uint64) (err error)
    632 //sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)
    633 //sys	Open(path string, mode int, perm uint32) (fd int, err error)
    634 //sys	Openat(fdat int, path string, mode int, perm uint32) (fd int, err error)
    635 //sys	Pathconf(path string, name int) (val int, err error)
    636 //sys	pread(fd int, p []byte, offset int64) (n int, err error)
    637 //sys	pwrite(fd int, p []byte, offset int64) (n int, err error)
    638 //sys	read(fd int, p []byte) (n int, err error)
    639 //sys	Readlink(path string, buf []byte) (n int, err error)
    640 //sys	Readlinkat(dirfd int, path string, buf []byte) (n int, err error)
    641 //sys	Rename(from string, to string) (err error)
    642 //sys	Renameat(fromfd int, from string, tofd int, to string) (err error)
    643 //sys	Revoke(path string) (err error)
    644 //sys	Rmdir(path string) (err error)
    645 //sys	Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
    646 //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
    647 //sysnb	Setegid(egid int) (err error)
    648 //sysnb	Seteuid(euid int) (err error)
    649 //sysnb	Setgid(gid int) (err error)
    650 //sys	Setlogin(name string) (err error)
    651 //sysnb	Setpgid(pid int, pgid int) (err error)
    652 //sys	Setpriority(which int, who int, prio int) (err error)
    653 //sysnb	Setregid(rgid int, egid int) (err error)
    654 //sysnb	Setreuid(ruid int, euid int) (err error)
    655 //sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
    656 //sysnb	Setresuid(ruid int, euid int, suid int) (err error)
    657 //sysnb	Setrlimit(which int, lim *Rlimit) (err error)
    658 //sysnb	Setsid() (pid int, err error)
    659 //sysnb	Settimeofday(tp *Timeval) (err error)
    660 //sysnb	Setuid(uid int) (err error)
    661 //sys	stat(path string, stat *stat_freebsd11_t) (err error)
    662 //sys	statfs(path string, stat *statfs_freebsd11_t) (err error)
    663 //sys	statfs_freebsd12(path string, stat *Statfs_t) (err error)
    664 //sys	Symlink(path string, link string) (err error)
    665 //sys	Symlinkat(oldpath string, newdirfd int, newpath string) (err error)
    666 //sys	Sync() (err error)
    667 //sys	Truncate(path string, length int64) (err error)
    668 //sys	Umask(newmask int) (oldmask int)
    669 //sys	Undelete(path string) (err error)
    670 //sys	Unlink(path string) (err error)
    671 //sys	Unlinkat(dirfd int, path string, flags int) (err error)
    672 //sys	Unmount(path string, flags int) (err error)
    673 //sys	write(fd int, p []byte) (n int, err error)
    674 //sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
    675 //sys	munmap(addr uintptr, length uintptr) (err error)
    676 //sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
    677 //sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
    678 //sys	accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
    679 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
    680 
    681 /*
    682  * Unimplemented
    683  */
    684 // Profil
    685 // Sigaction
    686 // Sigprocmask
    687 // Getlogin
    688 // Sigpending
    689 // Sigaltstack
    690 // Ioctl
    691 // Reboot
    692 // Execve
    693 // Vfork
    694 // Sbrk
    695 // Sstk
    696 // Ovadvise
    697 // Mincore
    698 // Setitimer
    699 // Swapon
    700 // Select
    701 // Sigsuspend
    702 // Readv
    703 // Writev
    704 // Nfssvc
    705 // Getfh
    706 // Quotactl
    707 // Mount
    708 // Csops
    709 // Waitid
    710 // Add_profil
    711 // Kdebug_trace
    712 // Sigreturn
    713 // Atsocket
    714 // Kqueue_from_portset_np
    715 // Kqueue_portset
    716 // Getattrlist
    717 // Setattrlist
    718 // Getdents
    719 // Getdirentriesattr
    720 // Searchfs
    721 // Delete
    722 // Copyfile
    723 // Watchevent
    724 // Waitevent
    725 // Modwatch
    726 // Fsctl
    727 // Initgroups
    728 // Posix_spawn
    729 // Nfsclnt
    730 // Fhopen
    731 // Minherit
    732 // Semsys
    733 // Msgsys
    734 // Shmsys
    735 // Semctl
    736 // Semget
    737 // Semop
    738 // Msgctl
    739 // Msgget
    740 // Msgsnd
    741 // Msgrcv
    742 // Shmat
    743 // Shmctl
    744 // Shmdt
    745 // Shmget
    746 // Shm_open
    747 // Shm_unlink
    748 // Sem_open
    749 // Sem_close
    750 // Sem_unlink
    751 // Sem_wait
    752 // Sem_trywait
    753 // Sem_post
    754 // Sem_getvalue
    755 // Sem_init
    756 // Sem_destroy
    757 // Open_extended
    758 // Umask_extended
    759 // Stat_extended
    760 // Lstat_extended
    761 // Fstat_extended
    762 // Chmod_extended
    763 // Fchmod_extended
    764 // Access_extended
    765 // Settid
    766 // Gettid
    767 // Setsgroups
    768 // Getsgroups
    769 // Setwgroups
    770 // Getwgroups
    771 // Mkfifo_extended
    772 // Mkdir_extended
    773 // Identitysvc
    774 // Shared_region_check_np
    775 // Shared_region_map_np
    776 // __pthread_mutex_destroy
    777 // __pthread_mutex_init
    778 // __pthread_mutex_lock
    779 // __pthread_mutex_trylock
    780 // __pthread_mutex_unlock
    781 // __pthread_cond_init
    782 // __pthread_cond_destroy
    783 // __pthread_cond_broadcast
    784 // __pthread_cond_signal
    785 // Setsid_with_pid
    786 // __pthread_cond_timedwait
    787 // Aio_fsync
    788 // Aio_return
    789 // Aio_suspend
    790 // Aio_cancel
    791 // Aio_error
    792 // Aio_read
    793 // Aio_write
    794 // Lio_listio
    795 // __pthread_cond_wait
    796 // Iopolicysys
    797 // __pthread_kill
    798 // __pthread_sigmask
    799 // __sigwait
    800 // __disable_threadsignal
    801 // __pthread_markcancel
    802 // __pthread_canceled
    803 // __semwait_signal
    804 // Proc_info
    805 // Stat64_extended
    806 // Lstat64_extended
    807 // Fstat64_extended
    808 // __pthread_chdir
    809 // __pthread_fchdir
    810 // Audit
    811 // Auditon
    812 // Getauid
    813 // Setauid
    814 // Getaudit
    815 // Setaudit
    816 // Getaudit_addr
    817 // Setaudit_addr
    818 // Auditctl
    819 // Bsdthread_create
    820 // Bsdthread_terminate
    821 // Stack_snapshot
    822 // Bsdthread_register
    823 // Workq_open
    824 // Workq_ops
    825 // __mac_execve
    826 // __mac_syscall
    827 // __mac_get_file
    828 // __mac_set_file
    829 // __mac_get_link
    830 // __mac_set_link
    831 // __mac_get_proc
    832 // __mac_set_proc
    833 // __mac_get_fd
    834 // __mac_set_fd
    835 // __mac_get_pid
    836 // __mac_get_lcid
    837 // __mac_get_lctx
    838 // __mac_set_lctx
    839 // Setlcid
    840 // Read_nocancel
    841 // Write_nocancel
    842 // Open_nocancel
    843 // Close_nocancel
    844 // Wait4_nocancel
    845 // Recvmsg_nocancel
    846 // Sendmsg_nocancel
    847 // Recvfrom_nocancel
    848 // Accept_nocancel
    849 // Fcntl_nocancel
    850 // Select_nocancel
    851 // Fsync_nocancel
    852 // Connect_nocancel
    853 // Sigsuspend_nocancel
    854 // Readv_nocancel
    855 // Writev_nocancel
    856 // Sendto_nocancel
    857 // Pread_nocancel
    858 // Pwrite_nocancel
    859 // Waitid_nocancel
    860 // Poll_nocancel
    861 // Msgsnd_nocancel
    862 // Msgrcv_nocancel
    863 // Sem_wait_nocancel
    864 // Aio_suspend_nocancel
    865 // __sigwait_nocancel
    866 // __semwait_signal_nocancel
    867 // __mac_mount
    868 // __mac_get_mount
    869 // __mac_getfsstat