usb-ks

USB Killswitch
git clone git://git.laack.co/usb-ks.git
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syscall_darwin.go (21366B)


      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 // Darwin 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 	"fmt"
     17 	"runtime"
     18 	"syscall"
     19 	"unsafe"
     20 )
     21 
     22 // SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
     23 type SockaddrDatalink struct {
     24 	Len    uint8
     25 	Family uint8
     26 	Index  uint16
     27 	Type   uint8
     28 	Nlen   uint8
     29 	Alen   uint8
     30 	Slen   uint8
     31 	Data   [12]int8
     32 	raw    RawSockaddrDatalink
     33 }
     34 
     35 // SockaddrCtl implements the Sockaddr interface for AF_SYSTEM type sockets.
     36 type SockaddrCtl struct {
     37 	ID   uint32
     38 	Unit uint32
     39 	raw  RawSockaddrCtl
     40 }
     41 
     42 func (sa *SockaddrCtl) sockaddr() (unsafe.Pointer, _Socklen, error) {
     43 	sa.raw.Sc_len = SizeofSockaddrCtl
     44 	sa.raw.Sc_family = AF_SYSTEM
     45 	sa.raw.Ss_sysaddr = AF_SYS_CONTROL
     46 	sa.raw.Sc_id = sa.ID
     47 	sa.raw.Sc_unit = sa.Unit
     48 	return unsafe.Pointer(&sa.raw), SizeofSockaddrCtl, nil
     49 }
     50 
     51 // SockaddrVM implements the Sockaddr interface for AF_VSOCK type sockets.
     52 // SockaddrVM provides access to Darwin VM sockets: a mechanism that enables
     53 // bidirectional communication between a hypervisor and its guest virtual
     54 // machines.
     55 type SockaddrVM struct {
     56 	// CID and Port specify a context ID and port address for a VM socket.
     57 	// Guests have a unique CID, and hosts may have a well-known CID of:
     58 	//  - VMADDR_CID_HYPERVISOR: refers to the hypervisor process.
     59 	//  - VMADDR_CID_LOCAL: refers to local communication (loopback).
     60 	//  - VMADDR_CID_HOST: refers to other processes on the host.
     61 	CID  uint32
     62 	Port uint32
     63 	raw  RawSockaddrVM
     64 }
     65 
     66 func (sa *SockaddrVM) sockaddr() (unsafe.Pointer, _Socklen, error) {
     67 	sa.raw.Len = SizeofSockaddrVM
     68 	sa.raw.Family = AF_VSOCK
     69 	sa.raw.Port = sa.Port
     70 	sa.raw.Cid = sa.CID
     71 
     72 	return unsafe.Pointer(&sa.raw), SizeofSockaddrVM, nil
     73 }
     74 
     75 func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
     76 	switch rsa.Addr.Family {
     77 	case AF_SYSTEM:
     78 		pp := (*RawSockaddrCtl)(unsafe.Pointer(rsa))
     79 		if pp.Ss_sysaddr == AF_SYS_CONTROL {
     80 			sa := new(SockaddrCtl)
     81 			sa.ID = pp.Sc_id
     82 			sa.Unit = pp.Sc_unit
     83 			return sa, nil
     84 		}
     85 	case AF_VSOCK:
     86 		pp := (*RawSockaddrVM)(unsafe.Pointer(rsa))
     87 		sa := &SockaddrVM{
     88 			CID:  pp.Cid,
     89 			Port: pp.Port,
     90 		}
     91 		return sa, nil
     92 	}
     93 	return nil, EAFNOSUPPORT
     94 }
     95 
     96 // Some external packages rely on SYS___SYSCTL being defined to implement their
     97 // own sysctl wrappers. Provide it here, even though direct syscalls are no
     98 // longer supported on darwin.
     99 const SYS___SYSCTL = SYS_SYSCTL
    100 
    101 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
    102 func nametomib(name string) (mib []_C_int, err error) {
    103 	const siz = unsafe.Sizeof(mib[0])
    104 
    105 	// NOTE(rsc): It seems strange to set the buffer to have
    106 	// size CTL_MAXNAME+2 but use only CTL_MAXNAME
    107 	// as the size. I don't know why the +2 is here, but the
    108 	// kernel uses +2 for its own implementation of this function.
    109 	// I am scared that if we don't include the +2 here, the kernel
    110 	// will silently write 2 words farther than we specify
    111 	// and we'll get memory corruption.
    112 	var buf [CTL_MAXNAME + 2]_C_int
    113 	n := uintptr(CTL_MAXNAME) * siz
    114 
    115 	p := (*byte)(unsafe.Pointer(&buf[0]))
    116 	bytes, err := ByteSliceFromString(name)
    117 	if err != nil {
    118 		return nil, err
    119 	}
    120 
    121 	// Magic sysctl: "setting" 0.3 to a string name
    122 	// lets you read back the array of integers form.
    123 	if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
    124 		return nil, err
    125 	}
    126 	return buf[0 : n/siz], nil
    127 }
    128 
    129 func direntIno(buf []byte) (uint64, bool) {
    130 	return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
    131 }
    132 
    133 func direntReclen(buf []byte) (uint64, bool) {
    134 	return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
    135 }
    136 
    137 func direntNamlen(buf []byte) (uint64, bool) {
    138 	return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
    139 }
    140 
    141 func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) }
    142 func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) }
    143 
    144 //sysnb	pipe(p *[2]int32) (err error)
    145 
    146 func Pipe(p []int) (err error) {
    147 	if len(p) != 2 {
    148 		return EINVAL
    149 	}
    150 	var x [2]int32
    151 	err = pipe(&x)
    152 	if err == nil {
    153 		p[0] = int(x[0])
    154 		p[1] = int(x[1])
    155 	}
    156 	return
    157 }
    158 
    159 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
    160 	var _p0 unsafe.Pointer
    161 	var bufsize uintptr
    162 	if len(buf) > 0 {
    163 		_p0 = unsafe.Pointer(&buf[0])
    164 		bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
    165 	}
    166 	return getfsstat(_p0, bufsize, flags)
    167 }
    168 
    169 func xattrPointer(dest []byte) *byte {
    170 	// It's only when dest is set to NULL that the OS X implementations of
    171 	// getxattr() and listxattr() return the current sizes of the named attributes.
    172 	// An empty byte array is not sufficient. To maintain the same behaviour as the
    173 	// linux implementation, we wrap around the system calls and pass in NULL when
    174 	// dest is empty.
    175 	var destp *byte
    176 	if len(dest) > 0 {
    177 		destp = &dest[0]
    178 	}
    179 	return destp
    180 }
    181 
    182 //sys	getxattr(path string, attr string, dest *byte, size int, position uint32, options int) (sz int, err error)
    183 
    184 func Getxattr(path string, attr string, dest []byte) (sz int, err error) {
    185 	return getxattr(path, attr, xattrPointer(dest), len(dest), 0, 0)
    186 }
    187 
    188 func Lgetxattr(link string, attr string, dest []byte) (sz int, err error) {
    189 	return getxattr(link, attr, xattrPointer(dest), len(dest), 0, XATTR_NOFOLLOW)
    190 }
    191 
    192 //sys	fgetxattr(fd int, attr string, dest *byte, size int, position uint32, options int) (sz int, err error)
    193 
    194 func Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) {
    195 	return fgetxattr(fd, attr, xattrPointer(dest), len(dest), 0, 0)
    196 }
    197 
    198 //sys	setxattr(path string, attr string, data *byte, size int, position uint32, options int) (err error)
    199 
    200 func Setxattr(path string, attr string, data []byte, flags int) (err error) {
    201 	// The parameters for the OS X implementation vary slightly compared to the
    202 	// linux system call, specifically the position parameter:
    203 	//
    204 	//  linux:
    205 	//      int setxattr(
    206 	//          const char *path,
    207 	//          const char *name,
    208 	//          const void *value,
    209 	//          size_t size,
    210 	//          int flags
    211 	//      );
    212 	//
    213 	//  darwin:
    214 	//      int setxattr(
    215 	//          const char *path,
    216 	//          const char *name,
    217 	//          void *value,
    218 	//          size_t size,
    219 	//          u_int32_t position,
    220 	//          int options
    221 	//      );
    222 	//
    223 	// position specifies the offset within the extended attribute. In the
    224 	// current implementation, only the resource fork extended attribute makes
    225 	// use of this argument. For all others, position is reserved. We simply
    226 	// default to setting it to zero.
    227 	return setxattr(path, attr, xattrPointer(data), len(data), 0, flags)
    228 }
    229 
    230 func Lsetxattr(link string, attr string, data []byte, flags int) (err error) {
    231 	return setxattr(link, attr, xattrPointer(data), len(data), 0, flags|XATTR_NOFOLLOW)
    232 }
    233 
    234 //sys	fsetxattr(fd int, attr string, data *byte, size int, position uint32, options int) (err error)
    235 
    236 func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) {
    237 	return fsetxattr(fd, attr, xattrPointer(data), len(data), 0, 0)
    238 }
    239 
    240 //sys	removexattr(path string, attr string, options int) (err error)
    241 
    242 func Removexattr(path string, attr string) (err error) {
    243 	// We wrap around and explicitly zero out the options provided to the OS X
    244 	// implementation of removexattr, we do so for interoperability with the
    245 	// linux variant.
    246 	return removexattr(path, attr, 0)
    247 }
    248 
    249 func Lremovexattr(link string, attr string) (err error) {
    250 	return removexattr(link, attr, XATTR_NOFOLLOW)
    251 }
    252 
    253 //sys	fremovexattr(fd int, attr string, options int) (err error)
    254 
    255 func Fremovexattr(fd int, attr string) (err error) {
    256 	return fremovexattr(fd, attr, 0)
    257 }
    258 
    259 //sys	listxattr(path string, dest *byte, size int, options int) (sz int, err error)
    260 
    261 func Listxattr(path string, dest []byte) (sz int, err error) {
    262 	return listxattr(path, xattrPointer(dest), len(dest), 0)
    263 }
    264 
    265 func Llistxattr(link string, dest []byte) (sz int, err error) {
    266 	return listxattr(link, xattrPointer(dest), len(dest), XATTR_NOFOLLOW)
    267 }
    268 
    269 //sys	flistxattr(fd int, dest *byte, size int, options int) (sz int, err error)
    270 
    271 func Flistxattr(fd int, dest []byte) (sz int, err error) {
    272 	return flistxattr(fd, xattrPointer(dest), len(dest), 0)
    273 }
    274 
    275 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
    276 
    277 /*
    278  * Wrapped
    279  */
    280 
    281 //sys	fcntl(fd int, cmd int, arg int) (val int, err error)
    282 
    283 //sys	kill(pid int, signum int, posix int) (err error)
    284 
    285 func Kill(pid int, signum syscall.Signal) (err error) { return kill(pid, int(signum), 1) }
    286 
    287 //sys	ioctl(fd int, req uint, arg uintptr) (err error)
    288 
    289 func IoctlCtlInfo(fd int, ctlInfo *CtlInfo) error {
    290 	err := ioctl(fd, CTLIOCGINFO, uintptr(unsafe.Pointer(ctlInfo)))
    291 	runtime.KeepAlive(ctlInfo)
    292 	return err
    293 }
    294 
    295 // IfreqMTU is struct ifreq used to get or set a network device's MTU.
    296 type IfreqMTU struct {
    297 	Name [IFNAMSIZ]byte
    298 	MTU  int32
    299 }
    300 
    301 // IoctlGetIfreqMTU performs the SIOCGIFMTU ioctl operation on fd to get the MTU
    302 // of the network device specified by ifname.
    303 func IoctlGetIfreqMTU(fd int, ifname string) (*IfreqMTU, error) {
    304 	var ifreq IfreqMTU
    305 	copy(ifreq.Name[:], ifname)
    306 	err := ioctl(fd, SIOCGIFMTU, uintptr(unsafe.Pointer(&ifreq)))
    307 	return &ifreq, err
    308 }
    309 
    310 // IoctlSetIfreqMTU performs the SIOCSIFMTU ioctl operation on fd to set the MTU
    311 // of the network device specified by ifreq.Name.
    312 func IoctlSetIfreqMTU(fd int, ifreq *IfreqMTU) error {
    313 	err := ioctl(fd, SIOCSIFMTU, uintptr(unsafe.Pointer(ifreq)))
    314 	runtime.KeepAlive(ifreq)
    315 	return err
    316 }
    317 
    318 //sys	sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS_SYSCTL
    319 
    320 func Uname(uname *Utsname) error {
    321 	mib := []_C_int{CTL_KERN, KERN_OSTYPE}
    322 	n := unsafe.Sizeof(uname.Sysname)
    323 	if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil {
    324 		return err
    325 	}
    326 
    327 	mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
    328 	n = unsafe.Sizeof(uname.Nodename)
    329 	if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil {
    330 		return err
    331 	}
    332 
    333 	mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
    334 	n = unsafe.Sizeof(uname.Release)
    335 	if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil {
    336 		return err
    337 	}
    338 
    339 	mib = []_C_int{CTL_KERN, KERN_VERSION}
    340 	n = unsafe.Sizeof(uname.Version)
    341 	if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil {
    342 		return err
    343 	}
    344 
    345 	// The version might have newlines or tabs in it, convert them to
    346 	// spaces.
    347 	for i, b := range uname.Version {
    348 		if b == '\n' || b == '\t' {
    349 			if i == len(uname.Version)-1 {
    350 				uname.Version[i] = 0
    351 			} else {
    352 				uname.Version[i] = ' '
    353 			}
    354 		}
    355 	}
    356 
    357 	mib = []_C_int{CTL_HW, HW_MACHINE}
    358 	n = unsafe.Sizeof(uname.Machine)
    359 	if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil {
    360 		return err
    361 	}
    362 
    363 	return nil
    364 }
    365 
    366 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
    367 	if raceenabled {
    368 		raceReleaseMerge(unsafe.Pointer(&ioSync))
    369 	}
    370 	var length = int64(count)
    371 	err = sendfile(infd, outfd, *offset, &length, nil, 0)
    372 	written = int(length)
    373 	return
    374 }
    375 
    376 func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {
    377 	var value IPMreqn
    378 	vallen := _Socklen(SizeofIPMreqn)
    379 	errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
    380 	return &value, errno
    381 }
    382 
    383 func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {
    384 	return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
    385 }
    386 
    387 // GetsockoptXucred is a getsockopt wrapper that returns an Xucred struct.
    388 // The usual level and opt are SOL_LOCAL and LOCAL_PEERCRED, respectively.
    389 func GetsockoptXucred(fd, level, opt int) (*Xucred, error) {
    390 	x := new(Xucred)
    391 	vallen := _Socklen(SizeofXucred)
    392 	err := getsockopt(fd, level, opt, unsafe.Pointer(x), &vallen)
    393 	return x, err
    394 }
    395 
    396 func SysctlKinfoProc(name string, args ...int) (*KinfoProc, error) {
    397 	mib, err := sysctlmib(name, args...)
    398 	if err != nil {
    399 		return nil, err
    400 	}
    401 
    402 	var kinfo KinfoProc
    403 	n := uintptr(SizeofKinfoProc)
    404 	if err := sysctl(mib, (*byte)(unsafe.Pointer(&kinfo)), &n, nil, 0); err != nil {
    405 		return nil, err
    406 	}
    407 	if n != SizeofKinfoProc {
    408 		return nil, EIO
    409 	}
    410 	return &kinfo, nil
    411 }
    412 
    413 func SysctlKinfoProcSlice(name string, args ...int) ([]KinfoProc, error) {
    414 	mib, err := sysctlmib(name, args...)
    415 	if err != nil {
    416 		return nil, err
    417 	}
    418 
    419 	// Find size.
    420 	n := uintptr(0)
    421 	if err := sysctl(mib, nil, &n, nil, 0); err != nil {
    422 		return nil, err
    423 	}
    424 	if n == 0 {
    425 		return nil, nil
    426 	}
    427 	if n%SizeofKinfoProc != 0 {
    428 		return nil, fmt.Errorf("sysctl() returned a size of %d, which is not a multiple of %d", n, SizeofKinfoProc)
    429 	}
    430 
    431 	// Read into buffer of that size.
    432 	buf := make([]KinfoProc, n/SizeofKinfoProc)
    433 	if err := sysctl(mib, (*byte)(unsafe.Pointer(&buf[0])), &n, nil, 0); err != nil {
    434 		return nil, err
    435 	}
    436 	if n%SizeofKinfoProc != 0 {
    437 		return nil, fmt.Errorf("sysctl() returned a size of %d, which is not a multiple of %d", n, SizeofKinfoProc)
    438 	}
    439 
    440 	// The actual call may return less than the original reported required
    441 	// size so ensure we deal with that.
    442 	return buf[:n/SizeofKinfoProc], nil
    443 }
    444 
    445 //sys	sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error)
    446 
    447 //sys	shmat(id int, addr uintptr, flag int) (ret uintptr, err error)
    448 //sys	shmctl(id int, cmd int, buf *SysvShmDesc) (result int, err error)
    449 //sys	shmdt(addr uintptr) (err error)
    450 //sys	shmget(key int, size int, flag int) (id int, err error)
    451 
    452 /*
    453  * Exposed directly
    454  */
    455 //sys	Access(path string, mode uint32) (err error)
    456 //sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
    457 //sys	Chdir(path string) (err error)
    458 //sys	Chflags(path string, flags int) (err error)
    459 //sys	Chmod(path string, mode uint32) (err error)
    460 //sys	Chown(path string, uid int, gid int) (err error)
    461 //sys	Chroot(path string) (err error)
    462 //sys	ClockGettime(clockid int32, time *Timespec) (err error)
    463 //sys	Close(fd int) (err error)
    464 //sys	Clonefile(src string, dst string, flags int) (err error)
    465 //sys	Clonefileat(srcDirfd int, src string, dstDirfd int, dst string, flags int) (err error)
    466 //sys	Dup(fd int) (nfd int, err error)
    467 //sys	Dup2(from int, to int) (err error)
    468 //sys	Exchangedata(path1 string, path2 string, options int) (err error)
    469 //sys	Exit(code int)
    470 //sys	Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
    471 //sys	Fchdir(fd int) (err error)
    472 //sys	Fchflags(fd int, flags int) (err error)
    473 //sys	Fchmod(fd int, mode uint32) (err error)
    474 //sys	Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
    475 //sys	Fchown(fd int, uid int, gid int) (err error)
    476 //sys	Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
    477 //sys	Fclonefileat(srcDirfd int, dstDirfd int, dst string, flags int) (err error)
    478 //sys	Flock(fd int, how int) (err error)
    479 //sys	Fpathconf(fd int, name int) (val int, err error)
    480 //sys	Fsync(fd int) (err error)
    481 //sys	Ftruncate(fd int, length int64) (err error)
    482 //sys	Getcwd(buf []byte) (n int, err error)
    483 //sys	Getdtablesize() (size int)
    484 //sysnb	Getegid() (egid int)
    485 //sysnb	Geteuid() (uid int)
    486 //sysnb	Getgid() (gid int)
    487 //sysnb	Getpgid(pid int) (pgid int, err error)
    488 //sysnb	Getpgrp() (pgrp int)
    489 //sysnb	Getpid() (pid int)
    490 //sysnb	Getppid() (ppid int)
    491 //sys	Getpriority(which int, who int) (prio int, err error)
    492 //sysnb	Getrlimit(which int, lim *Rlimit) (err error)
    493 //sysnb	Getrusage(who int, rusage *Rusage) (err error)
    494 //sysnb	Getsid(pid int) (sid int, err error)
    495 //sysnb	Gettimeofday(tp *Timeval) (err error)
    496 //sysnb	Getuid() (uid int)
    497 //sysnb	Issetugid() (tainted bool)
    498 //sys	Kqueue() (fd int, err error)
    499 //sys	Lchown(path string, uid int, gid int) (err error)
    500 //sys	Link(path string, link string) (err error)
    501 //sys	Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)
    502 //sys	Listen(s int, backlog int) (err error)
    503 //sys	Mkdir(path string, mode uint32) (err error)
    504 //sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
    505 //sys	Mkfifo(path string, mode uint32) (err error)
    506 //sys	Mknod(path string, mode uint32, dev int) (err error)
    507 //sys	Open(path string, mode int, perm uint32) (fd int, err error)
    508 //sys	Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error)
    509 //sys	Pathconf(path string, name int) (val int, err error)
    510 //sys	pread(fd int, p []byte, offset int64) (n int, err error)
    511 //sys	pwrite(fd int, p []byte, offset int64) (n int, err error)
    512 //sys	read(fd int, p []byte) (n int, err error)
    513 //sys	Readlink(path string, buf []byte) (n int, err error)
    514 //sys	Readlinkat(dirfd int, path string, buf []byte) (n int, err error)
    515 //sys	Rename(from string, to string) (err error)
    516 //sys	Renameat(fromfd int, from string, tofd int, to string) (err error)
    517 //sys	Revoke(path string) (err error)
    518 //sys	Rmdir(path string) (err error)
    519 //sys	Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
    520 //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
    521 //sys	Setegid(egid int) (err error)
    522 //sysnb	Seteuid(euid int) (err error)
    523 //sysnb	Setgid(gid int) (err error)
    524 //sys	Setlogin(name string) (err error)
    525 //sysnb	Setpgid(pid int, pgid int) (err error)
    526 //sys	Setpriority(which int, who int, prio int) (err error)
    527 //sys	Setprivexec(flag int) (err error)
    528 //sysnb	Setregid(rgid int, egid int) (err error)
    529 //sysnb	Setreuid(ruid int, euid int) (err error)
    530 //sysnb	Setrlimit(which int, lim *Rlimit) (err error)
    531 //sysnb	Setsid() (pid int, err error)
    532 //sysnb	Settimeofday(tp *Timeval) (err error)
    533 //sysnb	Setuid(uid int) (err error)
    534 //sys	Symlink(path string, link string) (err error)
    535 //sys	Symlinkat(oldpath string, newdirfd int, newpath string) (err error)
    536 //sys	Sync() (err error)
    537 //sys	Truncate(path string, length int64) (err error)
    538 //sys	Umask(newmask int) (oldmask int)
    539 //sys	Undelete(path string) (err error)
    540 //sys	Unlink(path string) (err error)
    541 //sys	Unlinkat(dirfd int, path string, flags int) (err error)
    542 //sys	Unmount(path string, flags int) (err error)
    543 //sys	write(fd int, p []byte) (n int, err error)
    544 //sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
    545 //sys	munmap(addr uintptr, length uintptr) (err error)
    546 //sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
    547 //sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
    548 
    549 /*
    550  * Unimplemented
    551  */
    552 // Profil
    553 // Sigaction
    554 // Sigprocmask
    555 // Getlogin
    556 // Sigpending
    557 // Sigaltstack
    558 // Ioctl
    559 // Reboot
    560 // Execve
    561 // Vfork
    562 // Sbrk
    563 // Sstk
    564 // Ovadvise
    565 // Mincore
    566 // Setitimer
    567 // Swapon
    568 // Select
    569 // Sigsuspend
    570 // Readv
    571 // Writev
    572 // Nfssvc
    573 // Getfh
    574 // Quotactl
    575 // Mount
    576 // Csops
    577 // Waitid
    578 // Add_profil
    579 // Kdebug_trace
    580 // Sigreturn
    581 // Atsocket
    582 // Kqueue_from_portset_np
    583 // Kqueue_portset
    584 // Getattrlist
    585 // Setattrlist
    586 // Getdirentriesattr
    587 // Searchfs
    588 // Delete
    589 // Copyfile
    590 // Watchevent
    591 // Waitevent
    592 // Modwatch
    593 // Fsctl
    594 // Initgroups
    595 // Posix_spawn
    596 // Nfsclnt
    597 // Fhopen
    598 // Minherit
    599 // Semsys
    600 // Msgsys
    601 // Shmsys
    602 // Semctl
    603 // Semget
    604 // Semop
    605 // Msgctl
    606 // Msgget
    607 // Msgsnd
    608 // Msgrcv
    609 // Shm_open
    610 // Shm_unlink
    611 // Sem_open
    612 // Sem_close
    613 // Sem_unlink
    614 // Sem_wait
    615 // Sem_trywait
    616 // Sem_post
    617 // Sem_getvalue
    618 // Sem_init
    619 // Sem_destroy
    620 // Open_extended
    621 // Umask_extended
    622 // Stat_extended
    623 // Lstat_extended
    624 // Fstat_extended
    625 // Chmod_extended
    626 // Fchmod_extended
    627 // Access_extended
    628 // Settid
    629 // Gettid
    630 // Setsgroups
    631 // Getsgroups
    632 // Setwgroups
    633 // Getwgroups
    634 // Mkfifo_extended
    635 // Mkdir_extended
    636 // Identitysvc
    637 // Shared_region_check_np
    638 // Shared_region_map_np
    639 // __pthread_mutex_destroy
    640 // __pthread_mutex_init
    641 // __pthread_mutex_lock
    642 // __pthread_mutex_trylock
    643 // __pthread_mutex_unlock
    644 // __pthread_cond_init
    645 // __pthread_cond_destroy
    646 // __pthread_cond_broadcast
    647 // __pthread_cond_signal
    648 // Setsid_with_pid
    649 // __pthread_cond_timedwait
    650 // Aio_fsync
    651 // Aio_return
    652 // Aio_suspend
    653 // Aio_cancel
    654 // Aio_error
    655 // Aio_read
    656 // Aio_write
    657 // Lio_listio
    658 // __pthread_cond_wait
    659 // Iopolicysys
    660 // __pthread_kill
    661 // __pthread_sigmask
    662 // __sigwait
    663 // __disable_threadsignal
    664 // __pthread_markcancel
    665 // __pthread_canceled
    666 // __semwait_signal
    667 // Proc_info
    668 // sendfile
    669 // Stat64_extended
    670 // Lstat64_extended
    671 // Fstat64_extended
    672 // __pthread_chdir
    673 // __pthread_fchdir
    674 // Audit
    675 // Auditon
    676 // Getauid
    677 // Setauid
    678 // Getaudit
    679 // Setaudit
    680 // Getaudit_addr
    681 // Setaudit_addr
    682 // Auditctl
    683 // Bsdthread_create
    684 // Bsdthread_terminate
    685 // Stack_snapshot
    686 // Bsdthread_register
    687 // Workq_open
    688 // Workq_ops
    689 // __mac_execve
    690 // __mac_syscall
    691 // __mac_get_file
    692 // __mac_set_file
    693 // __mac_get_link
    694 // __mac_set_link
    695 // __mac_get_proc
    696 // __mac_set_proc
    697 // __mac_get_fd
    698 // __mac_set_fd
    699 // __mac_get_pid
    700 // __mac_get_lcid
    701 // __mac_get_lctx
    702 // __mac_set_lctx
    703 // Setlcid
    704 // Read_nocancel
    705 // Write_nocancel
    706 // Open_nocancel
    707 // Close_nocancel
    708 // Wait4_nocancel
    709 // Recvmsg_nocancel
    710 // Sendmsg_nocancel
    711 // Recvfrom_nocancel
    712 // Accept_nocancel
    713 // Fcntl_nocancel
    714 // Select_nocancel
    715 // Fsync_nocancel
    716 // Connect_nocancel
    717 // Sigsuspend_nocancel
    718 // Readv_nocancel
    719 // Writev_nocancel
    720 // Sendto_nocancel
    721 // Pread_nocancel
    722 // Pwrite_nocancel
    723 // Waitid_nocancel
    724 // Poll_nocancel
    725 // Msgsnd_nocancel
    726 // Msgrcv_nocancel
    727 // Sem_wait_nocancel
    728 // Aio_suspend_nocancel
    729 // __sigwait_nocancel
    730 // __semwait_signal_nocancel
    731 // __mac_mount
    732 // __mac_get_mount
    733 // __mac_getfsstat