syscall_darwin.go
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syscall_darwin.go
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	// Copyright 2009,2010 The Go Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file.

	// Darwin system calls.
	// This file is compiled as ordinary Go code,
	// but it is also input to mksyscall,
	// which parses the //sys lines and generates system call stubs.
	// Note that sometimes we use a lowercase //sys name and wrap
	// it in our own nicer implementation, either here or in
	// syscall_bsd.go or syscall_unix.go.

	package unix

	import (
	"fmt"
	"runtime"
	"syscall"
	"unsafe"
	)

	//sys closedir(dir uintptr) (err error)
	//sys readdir_r(dir uintptr, entry Dirent, result *Dirent) (res Errno)

	func fdopendir(fd int) (dir uintptr, err error) {
	r0, _, e1 := syscall_syscallPtr(libc_fdopendir_trampoline_addr, uintptr(fd), 0, 0)
	dir = uintptr(r0)
	if e1 != 0 {
	err = errnoErr(e1)
	}
	return
	}

	var libc_fdopendir_trampoline_addr uintptr

	//go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib"

	func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
	// Simulate Getdirentries using fdopendir/readdir_r/closedir.
	// We store the number of entries to skip in the seek
	// offset of fd. See issue #31368.
	// It's not the full required semantics, but should handle the case
	// of calling Getdirentries or ReadDirent repeatedly.
	// It won't handle assigning the results of lseek to *basep, or handle
	// the directory being edited underfoot.
	skip, err := Seek(fd, 0, 1 /* SEEK_CUR */)
	if err != nil {
	return 0, err
	}

	// We need to duplicate the incoming file descriptor
	// because the caller expects to retain control of it, but
	// fdopendir expects to take control of its argument.
	// Just Dup'ing the file descriptor is not enough, as the
	// result shares underlying state. Use Openat to make a really
	// new file descriptor referring to the same directory.
	fd2, err := Openat(fd, ".", O_RDONLY, 0)
	if err != nil {
	return 0, err
	}
	d, err := fdopendir(fd2)
	if err != nil {
	Close(fd2)
	return 0, err
	}
	defer closedir(d)

	var cnt int64
	for {
	var entry Dirent
	var entryp *Dirent
	e := readdir_r(d, &entry, &entryp)
	if e != 0 {
	return n, errnoErr(e)
	}
	if entryp == nil {
	break
	}
	if skip > 0 {
	skip--
	cnt++
	continue
	}

	reclen := int(entry.Reclen)
	if reclen > len(buf) {
	// Not enough room. Return for now.
	// The counter will let us know where we should start up again.
	// Note: this strategy for suspending in the middle and
	// restarting is O(n^2) in the length of the directory. Oh well.
	break
	}

	// Copy entry into return buffer.
	s := unsafe.Slice((*byte)(unsafe.Pointer(&entry)), reclen)
	copy(buf, s)

	buf = buf[reclen:]
	n += reclen
	cnt++
	}
	// Set the seek offset of the input fd to record
	// how many files we've already returned.
	_, err = Seek(fd, cnt, 0 /* SEEK_SET */)
	if err != nil {
	return n, err
	}

	return n, nil
	}

	// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
	type SockaddrDatalink struct {
	Len uint8
	Family uint8
	Index uint16
	Type uint8
	Nlen uint8
	Alen uint8
	Slen uint8
	Data [12]int8
	raw RawSockaddrDatalink
	}

	// SockaddrCtl implements the Sockaddr interface for AF_SYSTEM type sockets.
	type SockaddrCtl struct {
	ID uint32
	Unit uint32
	raw RawSockaddrCtl
	}

	func (sa *SockaddrCtl) sockaddr() (unsafe.Pointer, _Socklen, error) {
	sa.raw.Sc_len = SizeofSockaddrCtl
	sa.raw.Sc_family = AF_SYSTEM
	sa.raw.Ss_sysaddr = AF_SYS_CONTROL
	sa.raw.Sc_id = sa.ID
	sa.raw.Sc_unit = sa.Unit
	return unsafe.Pointer(&sa.raw), SizeofSockaddrCtl, nil
	}

	// SockaddrVM implements the Sockaddr interface for AF_VSOCK type sockets.
	// SockaddrVM provides access to Darwin VM sockets: a mechanism that enables
	// bidirectional communication between a hypervisor and its guest virtual
	// machines.
	type SockaddrVM struct {
	// CID and Port specify a context ID and port address for a VM socket.
	// Guests have a unique CID, and hosts may have a well-known CID of:
	// - VMADDR_CID_HYPERVISOR: refers to the hypervisor process.
	// - VMADDR_CID_LOCAL: refers to local communication (loopback).
	// - VMADDR_CID_HOST: refers to other processes on the host.
	CID uint32
	Port uint32
	raw RawSockaddrVM
	}

	func (sa *SockaddrVM) sockaddr() (unsafe.Pointer, _Socklen, error) {
	sa.raw.Len = SizeofSockaddrVM
	sa.raw.Family = AF_VSOCK
	sa.raw.Port = sa.Port
	sa.raw.Cid = sa.CID

	return unsafe.Pointer(&sa.raw), SizeofSockaddrVM, nil
	}

	func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
	switch rsa.Addr.Family {
	case AF_SYSTEM:
	pp := (*RawSockaddrCtl)(unsafe.Pointer(rsa))
	if pp.Ss_sysaddr == AF_SYS_CONTROL {
	sa := new(SockaddrCtl)
	sa.ID = pp.Sc_id
	sa.Unit = pp.Sc_unit
	return sa, nil
	}
	case AF_VSOCK:
	pp := (*RawSockaddrVM)(unsafe.Pointer(rsa))
	sa := &SockaddrVM{
	CID: pp.Cid,
	Port: pp.Port,
	}
	return sa, nil
	}
	return nil, EAFNOSUPPORT
	}

	// Some external packages rely on SYS___SYSCTL being defined to implement their
	// own sysctl wrappers. Provide it here, even though direct syscalls are no
	// longer supported on darwin.
	const SYS___SYSCTL = SYS_SYSCTL

	// Translate "kern.hostname" to []_C_int{0,1,2,3}.
	func nametomib(name string) (mib []_C_int, err error) {
	const siz = unsafe.Sizeof(mib[0])

	// NOTE(rsc): It seems strange to set the buffer to have
	// size CTL_MAXNAME+2 but use only CTL_MAXNAME
	// as the size. I don't know why the +2 is here, but the
	// kernel uses +2 for its own implementation of this function.
	// I am scared that if we don't include the +2 here, the kernel
	// will silently write 2 words farther than we specify
	// and we'll get memory corruption.
	var buf [CTL_MAXNAME + 2]_C_int
	n := uintptr(CTL_MAXNAME) * siz

	p := (*byte)(unsafe.Pointer(&buf[0]))
	bytes, err := ByteSliceFromString(name)
	if err != nil {
	return nil, err
	}

	// Magic sysctl: "setting" 0.3 to a string name
	// lets you read back the array of integers form.
	if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
	return nil, err
	}
	return buf[0 : n/siz], nil
	}

	func direntIno(buf []byte) (uint64, bool) {
	return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
	}

	func direntReclen(buf []byte) (uint64, bool) {
	return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
	}

	func direntNamlen(buf []byte) (uint64, bool) {
	return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
	}

	func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) }
	func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) }

	//sysnb pipe(p *[2]int32) (err error)

	func Pipe(p []int) (err error) {
	if len(p) != 2 {
	return EINVAL
	}
	var x [2]int32
	err = pipe(&x)
	if err == nil {
	p[0] = int(x[0])
	p[1] = int(x[1])
	}
	return
	}

	func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
	var _p0 unsafe.Pointer
	var bufsize uintptr
	if len(buf) > 0 {
	_p0 = unsafe.Pointer(&buf[0])
	bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
	}
	return getfsstat(_p0, bufsize, flags)
	}

	func xattrPointer(dest []byte) *byte {
	// It's only when dest is set to NULL that the OS X implementations of
	// getxattr() and listxattr() return the current sizes of the named attributes.
	// An empty byte array is not sufficient. To maintain the same behaviour as the
	// linux implementation, we wrap around the system calls and pass in NULL when
	// dest is empty.
	var destp *byte
	if len(dest) > 0 {
	destp = &dest[0]
	}
	return destp
	}

	//sys getxattr(path string, attr string, dest *byte, size int, position uint32, options int) (sz int, err error)

	func Getxattr(path string, attr string, dest []byte) (sz int, err error) {
	return getxattr(path, attr, xattrPointer(dest), len(dest), 0, 0)
	}

	func Lgetxattr(link string, attr string, dest []byte) (sz int, err error) {
	return getxattr(link, attr, xattrPointer(dest), len(dest), 0, XATTR_NOFOLLOW)
	}

	//sys fgetxattr(fd int, attr string, dest *byte, size int, position uint32, options int) (sz int, err error)

	func Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) {
	return fgetxattr(fd, attr, xattrPointer(dest), len(dest), 0, 0)
	}

	//sys setxattr(path string, attr string, data *byte, size int, position uint32, options int) (err error)

	func Setxattr(path string, attr string, data []byte, flags int) (err error) {
	// The parameters for the OS X implementation vary slightly compared to the
	// linux system call, specifically the position parameter:
	//
	// linux:
	// int setxattr(
	// const char *path,
	// const char *name,
	// const void *value,
	// size_t size,
	// int flags
	// );
	//
	// darwin:
	// int setxattr(
	// const char *path,
	// const char *name,
	// void *value,
	// size_t size,
	// u_int32_t position,
	// int options
	// );
	//
	// position specifies the offset within the extended attribute. In the
	// current implementation, only the resource fork extended attribute makes
	// use of this argument. For all others, position is reserved. We simply
	// default to setting it to zero.
	return setxattr(path, attr, xattrPointer(data), len(data), 0, flags)
	}

	func Lsetxattr(link string, attr string, data []byte, flags int) (err error) {
	return setxattr(link, attr, xattrPointer(data), len(data), 0, flags\|XATTR_NOFOLLOW)
	}

	//sys fsetxattr(fd int, attr string, data *byte, size int, position uint32, options int) (err error)

	func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) {
	return fsetxattr(fd, attr, xattrPointer(data), len(data), 0, 0)
	}

	//sys removexattr(path string, attr string, options int) (err error)

	func Removexattr(path string, attr string) (err error) {
	// We wrap around and explicitly zero out the options provided to the OS X
	// implementation of removexattr, we do so for interoperability with the
	// linux variant.
	return removexattr(path, attr, 0)
	}

	func Lremovexattr(link string, attr string) (err error) {
	return removexattr(link, attr, XATTR_NOFOLLOW)
	}

	//sys fremovexattr(fd int, attr string, options int) (err error)

	func Fremovexattr(fd int, attr string) (err error) {
	return fremovexattr(fd, attr, 0)
	}

	//sys listxattr(path string, dest *byte, size int, options int) (sz int, err error)

	func Listxattr(path string, dest []byte) (sz int, err error) {
	return listxattr(path, xattrPointer(dest), len(dest), 0)
	}

	func Llistxattr(link string, dest []byte) (sz int, err error) {
	return listxattr(link, xattrPointer(dest), len(dest), XATTR_NOFOLLOW)
	}

	//sys flistxattr(fd int, dest *byte, size int, options int) (sz int, err error)

	func Flistxattr(fd int, dest []byte) (sz int, err error) {
	return flistxattr(fd, xattrPointer(dest), len(dest), 0)
	}

	//sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)

	/*
	* Wrapped
	*/

	//sys fcntl(fd int, cmd int, arg int) (val int, err error)

	//sys kill(pid int, signum int, posix int) (err error)

	func Kill(pid int, signum syscall.Signal) (err error) { return kill(pid, int(signum), 1) }

	//sys ioctl(fd int, req uint, arg uintptr) (err error)

	func IoctlCtlInfo(fd int, ctlInfo *CtlInfo) error {
	err := ioctl(fd, CTLIOCGINFO, uintptr(unsafe.Pointer(ctlInfo)))
	runtime.KeepAlive(ctlInfo)
	return err
	}

	// IfreqMTU is struct ifreq used to get or set a network device's MTU.
	type IfreqMTU struct {
	Name [IFNAMSIZ]byte
	MTU int32
	}

	// IoctlGetIfreqMTU performs the SIOCGIFMTU ioctl operation on fd to get the MTU
	// of the network device specified by ifname.
	func IoctlGetIfreqMTU(fd int, ifname string) (*IfreqMTU, error) {
	var ifreq IfreqMTU
	copy(ifreq.Name[:], ifname)
	err := ioctl(fd, SIOCGIFMTU, uintptr(unsafe.Pointer(&ifreq)))
	return &ifreq, err
	}

	// IoctlSetIfreqMTU performs the SIOCSIFMTU ioctl operation on fd to set the MTU
	// of the network device specified by ifreq.Name.
	func IoctlSetIfreqMTU(fd int, ifreq *IfreqMTU) error {
	err := ioctl(fd, SIOCSIFMTU, uintptr(unsafe.Pointer(ifreq)))
	runtime.KeepAlive(ifreq)
	return err
	}

	//sys sysctl(mib []_C_int, old byte, oldlen uintptr, new *byte, newlen uintptr) (err error) = SYS_SYSCTL

	func Uname(uname *Utsname) error {
	mib := []_C_int{CTL_KERN, KERN_OSTYPE}
	n := unsafe.Sizeof(uname.Sysname)
	if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil {
	return err
	}

	mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
	n = unsafe.Sizeof(uname.Nodename)
	if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil {
	return err
	}

	mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
	n = unsafe.Sizeof(uname.Release)
	if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil {
	return err
	}

	mib = []_C_int{CTL_KERN, KERN_VERSION}
	n = unsafe.Sizeof(uname.Version)
	if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil {
	return err
	}

	// The version might have newlines or tabs in it, convert them to
	// spaces.
	for i, b := range uname.Version {
	if b == '\n' \|\| b == '\t' {
	if i == len(uname.Version)-1 {
	uname.Version[i] = 0
	} else {
	uname.Version[i] = ' '
	}
	}
	}

	mib = []_C_int{CTL_HW, HW_MACHINE}
	n = unsafe.Sizeof(uname.Machine)
	if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil {
	return err
	}

	return nil
	}

	func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
	if raceenabled {
	raceReleaseMerge(unsafe.Pointer(&ioSync))
	}
	var length = int64(count)
	err = sendfile(infd, outfd, *offset, &length, nil, 0)
	written = int(length)
	return
	}

	func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {
	var value IPMreqn
	vallen := _Socklen(SizeofIPMreqn)
	errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, errno
	}

	func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {
	return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
	}

	// GetsockoptXucred is a getsockopt wrapper that returns an Xucred struct.
	// The usual level and opt are SOL_LOCAL and LOCAL_PEERCRED, respectively.
	func GetsockoptXucred(fd, level, opt int) (*Xucred, error) {
	x := new(Xucred)
	vallen := _Socklen(SizeofXucred)
	err := getsockopt(fd, level, opt, unsafe.Pointer(x), &vallen)
	return x, err
	}

	func GetsockoptTCPConnectionInfo(fd, level, opt int) (*TCPConnectionInfo, error) {
	var value TCPConnectionInfo
	vallen := _Socklen(SizeofTCPConnectionInfo)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
	}

	func SysctlKinfoProc(name string, args ...int) (*KinfoProc, error) {
	mib, err := sysctlmib(name, args...)
	if err != nil {
	return nil, err
	}

	var kinfo KinfoProc
	n := uintptr(SizeofKinfoProc)
	if err := sysctl(mib, (*byte)(unsafe.Pointer(&kinfo)), &n, nil, 0); err != nil {
	return nil, err
	}
	if n != SizeofKinfoProc {
	return nil, EIO
	}
	return &kinfo, nil
	}

	func SysctlKinfoProcSlice(name string, args ...int) ([]KinfoProc, error) {
	mib, err := sysctlmib(name, args...)
	if err != nil {
	return nil, err
	}

	// Find size.
	n := uintptr(0)
	if err := sysctl(mib, nil, &n, nil, 0); err != nil {
	return nil, err
	}
	if n == 0 {
	return nil, nil
	}
	if n%SizeofKinfoProc != 0 {
	return nil, fmt.Errorf("sysctl() returned a size of %d, which is not a multiple of %d", n, SizeofKinfoProc)
	}

	// Read into buffer of that size.
	buf := make([]KinfoProc, n/SizeofKinfoProc)
	if err := sysctl(mib, (*byte)(unsafe.Pointer(&buf[0])), &n, nil, 0); err != nil {
	return nil, err
	}
	if n%SizeofKinfoProc != 0 {
	return nil, fmt.Errorf("sysctl() returned a size of %d, which is not a multiple of %d", n, SizeofKinfoProc)
	}

	// The actual call may return less than the original reported required
	// size so ensure we deal with that.
	return buf[:n/SizeofKinfoProc], nil
	}

	//sys sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error)

	//sys shmat(id int, addr uintptr, flag int) (ret uintptr, err error)
	//sys shmctl(id int, cmd int, buf *SysvShmDesc) (result int, err error)
	//sys shmdt(addr uintptr) (err error)
	//sys shmget(key int, size int, flag int) (id int, err error)

	/*
	* Exposed directly
	*/
	//sys Access(path string, mode uint32) (err error)
	//sys Adjtime(delta Timeval, olddelta Timeval) (err error)
	//sys Chdir(path string) (err error)
	//sys Chflags(path string, flags int) (err error)
	//sys Chmod(path string, mode uint32) (err error)
	//sys Chown(path string, uid int, gid int) (err error)
	//sys Chroot(path string) (err error)
	//sys ClockGettime(clockid int32, time *Timespec) (err error)
	//sys Close(fd int) (err error)
	//sys Clonefile(src string, dst string, flags int) (err error)
	//sys Clonefileat(srcDirfd int, src string, dstDirfd int, dst string, flags int) (err error)
	//sys Dup(fd int) (nfd int, err error)
	//sys Dup2(from int, to int) (err error)
	//sys Exchangedata(path1 string, path2 string, options int) (err error)
	//sys Exit(code int)
	//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
	//sys Fchdir(fd int) (err error)
	//sys Fchflags(fd int, flags int) (err error)
	//sys Fchmod(fd int, mode uint32) (err error)
	//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
	//sys Fchown(fd int, uid int, gid int) (err error)
	//sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
	//sys Fclonefileat(srcDirfd int, dstDirfd int, dst string, flags int) (err error)
	//sys Flock(fd int, how int) (err error)
	//sys Fpathconf(fd int, name int) (val int, err error)
	//sys Fsync(fd int) (err error)
	//sys Ftruncate(fd int, length int64) (err error)
	//sys Getcwd(buf []byte) (n int, err error)
	//sys Getdtablesize() (size int)
	//sysnb Getegid() (egid int)
	//sysnb Geteuid() (uid int)
	//sysnb Getgid() (gid int)
	//sysnb Getpgid(pid int) (pgid int, err error)
	//sysnb Getpgrp() (pgrp int)
	//sysnb Getpid() (pid int)
	//sysnb Getppid() (ppid int)
	//sys Getpriority(which int, who int) (prio int, err error)
	//sysnb Getrlimit(which int, lim *Rlimit) (err error)
	//sysnb Getrusage(who int, rusage *Rusage) (err error)
	//sysnb Getsid(pid int) (sid int, err error)
	//sysnb Gettimeofday(tp *Timeval) (err error)
	//sysnb Getuid() (uid int)
	//sysnb Issetugid() (tainted bool)
	//sys Kqueue() (fd int, err error)
	//sys Lchown(path string, uid int, gid int) (err error)
	//sys Link(path string, link string) (err error)
	//sys Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)
	//sys Listen(s int, backlog int) (err error)
	//sys Mkdir(path string, mode uint32) (err error)
	//sys Mkdirat(dirfd int, path string, mode uint32) (err error)
	//sys Mkfifo(path string, mode uint32) (err error)
	//sys Mknod(path string, mode uint32, dev int) (err error)
	//sys Mount(fsType string, dir string, flags int, data unsafe.Pointer) (err error)
	//sys Open(path string, mode int, perm uint32) (fd int, err error)
	//sys Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error)
	//sys Pathconf(path string, name int) (val int, err error)
	//sys pread(fd int, p []byte, offset int64) (n int, err error)
	//sys pwrite(fd int, p []byte, offset int64) (n int, err error)
	//sys read(fd int, p []byte) (n int, err error)
	//sys Readlink(path string, buf []byte) (n int, err error)
	//sys Readlinkat(dirfd int, path string, buf []byte) (n int, err error)
	//sys Rename(from string, to string) (err error)
	//sys Renameat(fromfd int, from string, tofd int, to string) (err error)
	//sys Revoke(path string) (err error)
	//sys Rmdir(path string) (err error)
	//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
	//sys Select(nfd int, r FdSet, w FdSet, e FdSet, timeout Timeval) (n int, err error)
	//sys Setegid(egid int) (err error)
	//sysnb Seteuid(euid int) (err error)
	//sysnb Setgid(gid int) (err error)
	//sys Setlogin(name string) (err error)
	//sysnb Setpgid(pid int, pgid int) (err error)
	//sys Setpriority(which int, who int, prio int) (err error)
	//sys Setprivexec(flag int) (err error)
	//sysnb Setregid(rgid int, egid int) (err error)
	//sysnb Setreuid(ruid int, euid int) (err error)
	//sysnb Setrlimit(which int, lim *Rlimit) (err error)
	//sysnb Setsid() (pid int, err error)
	//sysnb Settimeofday(tp *Timeval) (err error)
	//sysnb Setuid(uid int) (err error)
	//sys Symlink(path string, link string) (err error)
	//sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error)
	//sys Sync() (err error)
	//sys Truncate(path string, length int64) (err error)
	//sys Umask(newmask int) (oldmask int)
	//sys Undelete(path string) (err error)
	//sys Unlink(path string) (err error)
	//sys Unlinkat(dirfd int, path string, flags int) (err error)
	//sys Unmount(path string, flags int) (err error)
	//sys write(fd int, p []byte) (n int, err error)
	//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
	//sys munmap(addr uintptr, length uintptr) (err error)
	//sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
	//sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE

	/*
	* Unimplemented
	*/
	// Profil
	// Sigaction
	// Sigprocmask
	// Getlogin
	// Sigpending
	// Sigaltstack
	// Ioctl
	// Reboot
	// Execve
	// Vfork
	// Sbrk
	// Sstk
	// Ovadvise
	// Mincore
	// Setitimer
	// Swapon
	// Select
	// Sigsuspend
	// Readv
	// Writev
	// Nfssvc
	// Getfh
	// Quotactl
	// Csops
	// Waitid
	// Add_profil
	// Kdebug_trace
	// Sigreturn
	// Atsocket
	// Kqueue_from_portset_np
	// Kqueue_portset
	// Getattrlist
	// Setattrlist
	// Getdirentriesattr
	// Searchfs
	// Delete
	// Copyfile
	// Watchevent
	// Waitevent
	// Modwatch
	// Fsctl
	// Initgroups
	// Posix_spawn
	// Nfsclnt
	// Fhopen
	// Minherit
	// Semsys
	// Msgsys
	// Shmsys
	// Semctl
	// Semget
	// Semop
	// Msgctl
	// Msgget
	// Msgsnd
	// Msgrcv
	// Shm_open
	// Shm_unlink
	// Sem_open
	// Sem_close
	// Sem_unlink
	// Sem_wait
	// Sem_trywait
	// Sem_post
	// Sem_getvalue
	// Sem_init
	// Sem_destroy
	// Open_extended
	// Umask_extended
	// Stat_extended
	// Lstat_extended
	// Fstat_extended
	// Chmod_extended
	// Fchmod_extended
	// Access_extended
	// Settid
	// Gettid
	// Setsgroups
	// Getsgroups
	// Setwgroups
	// Getwgroups
	// Mkfifo_extended
	// Mkdir_extended
	// Identitysvc
	// Shared_region_check_np
	// Shared_region_map_np
	// __pthread_mutex_destroy
	// __pthread_mutex_init
	// __pthread_mutex_lock
	// __pthread_mutex_trylock
	// __pthread_mutex_unlock
	// __pthread_cond_init
	// __pthread_cond_destroy
	// __pthread_cond_broadcast
	// __pthread_cond_signal
	// Setsid_with_pid
	// __pthread_cond_timedwait
	// Aio_fsync
	// Aio_return
	// Aio_suspend
	// Aio_cancel
	// Aio_error
	// Aio_read
	// Aio_write
	// Lio_listio
	// __pthread_cond_wait
	// Iopolicysys
	// __pthread_kill
	// __pthread_sigmask
	// __sigwait
	// __disable_threadsignal
	// __pthread_markcancel
	// __pthread_canceled
	// __semwait_signal
	// Proc_info
	// sendfile
	// Stat64_extended
	// Lstat64_extended
	// Fstat64_extended
	// __pthread_chdir
	// __pthread_fchdir
	// Audit
	// Auditon
	// Getauid
	// Setauid
	// Getaudit
	// Setaudit
	// Getaudit_addr
	// Setaudit_addr
	// Auditctl
	// Bsdthread_create
	// Bsdthread_terminate
	// Stack_snapshot
	// Bsdthread_register
	// Workq_open
	// Workq_ops
	// __mac_execve
	// __mac_syscall
	// __mac_get_file
	// __mac_set_file
	// __mac_get_link
	// __mac_set_link
	// __mac_get_proc
	// __mac_set_proc
	// __mac_get_fd
	// __mac_set_fd
	// __mac_get_pid
	// __mac_get_lcid
	// __mac_get_lctx
	// __mac_set_lctx
	// Setlcid
	// Read_nocancel
	// Write_nocancel
	// Open_nocancel
	// Close_nocancel
	// Wait4_nocancel
	// Recvmsg_nocancel
	// Sendmsg_nocancel
	// Recvfrom_nocancel
	// Accept_nocancel
	// Fcntl_nocancel
	// Select_nocancel
	// Fsync_nocancel
	// Connect_nocancel
	// Sigsuspend_nocancel
	// Readv_nocancel
	// Writev_nocancel
	// Sendto_nocancel
	// Pread_nocancel
	// Pwrite_nocancel
	// Waitid_nocancel
	// Poll_nocancel
	// Msgsnd_nocancel
	// Msgrcv_nocancel
	// Sem_wait_nocancel
	// Aio_suspend_nocancel
	// __sigwait_nocancel
	// __semwait_signal_nocancel
	// __mac_mount
	// __mac_get_mount
	// __mac_getfsstat

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