Source file src/cmd/vendor/golang.org/x/sys/unix/syscall_darwin.go
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 "syscall" 18 "unsafe" 19 ) 20 21 //sys closedir(dir uintptr) (err error) 22 //sys readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno) 23 24 func fdopendir(fd int) (dir uintptr, err error) { 25 r0, _, e1 := syscall_syscallPtr(libc_fdopendir_trampoline_addr, uintptr(fd), 0, 0) 26 dir = uintptr(r0) 27 if e1 != 0 { 28 err = errnoErr(e1) 29 } 30 return 31 } 32 33 var libc_fdopendir_trampoline_addr uintptr 34 35 //go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib" 36 37 func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { 38 // Simulate Getdirentries using fdopendir/readdir_r/closedir. 39 // We store the number of entries to skip in the seek 40 // offset of fd. See issue #31368. 41 // It's not the full required semantics, but should handle the case 42 // of calling Getdirentries or ReadDirent repeatedly. 43 // It won't handle assigning the results of lseek to *basep, or handle 44 // the directory being edited underfoot. 45 skip, err := Seek(fd, 0, 1 /* SEEK_CUR */) 46 if err != nil { 47 return 0, err 48 } 49 50 // We need to duplicate the incoming file descriptor 51 // because the caller expects to retain control of it, but 52 // fdopendir expects to take control of its argument. 53 // Just Dup'ing the file descriptor is not enough, as the 54 // result shares underlying state. Use Openat to make a really 55 // new file descriptor referring to the same directory. 56 fd2, err := Openat(fd, ".", O_RDONLY, 0) 57 if err != nil { 58 return 0, err 59 } 60 d, err := fdopendir(fd2) 61 if err != nil { 62 Close(fd2) 63 return 0, err 64 } 65 defer closedir(d) 66 67 var cnt int64 68 for { 69 var entry Dirent 70 var entryp *Dirent 71 e := readdir_r(d, &entry, &entryp) 72 if e != 0 { 73 return n, errnoErr(e) 74 } 75 if entryp == nil { 76 break 77 } 78 if skip > 0 { 79 skip-- 80 cnt++ 81 continue 82 } 83 84 reclen := int(entry.Reclen) 85 if reclen > len(buf) { 86 // Not enough room. Return for now. 87 // The counter will let us know where we should start up again. 88 // Note: this strategy for suspending in the middle and 89 // restarting is O(n^2) in the length of the directory. Oh well. 90 break 91 } 92 93 // Copy entry into return buffer. 94 s := unsafe.Slice((*byte)(unsafe.Pointer(&entry)), reclen) 95 copy(buf, s) 96 97 buf = buf[reclen:] 98 n += reclen 99 cnt++ 100 } 101 // Set the seek offset of the input fd to record 102 // how many files we've already returned. 103 _, err = Seek(fd, cnt, 0 /* SEEK_SET */) 104 if err != nil { 105 return n, err 106 } 107 108 return n, nil 109 } 110 111 // SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets. 112 type SockaddrDatalink struct { 113 Len uint8 114 Family uint8 115 Index uint16 116 Type uint8 117 Nlen uint8 118 Alen uint8 119 Slen uint8 120 Data [12]int8 121 raw RawSockaddrDatalink 122 } 123 124 // SockaddrCtl implements the Sockaddr interface for AF_SYSTEM type sockets. 125 type SockaddrCtl struct { 126 ID uint32 127 Unit uint32 128 raw RawSockaddrCtl 129 } 130 131 func (sa *SockaddrCtl) sockaddr() (unsafe.Pointer, _Socklen, error) { 132 sa.raw.Sc_len = SizeofSockaddrCtl 133 sa.raw.Sc_family = AF_SYSTEM 134 sa.raw.Ss_sysaddr = AF_SYS_CONTROL 135 sa.raw.Sc_id = sa.ID 136 sa.raw.Sc_unit = sa.Unit 137 return unsafe.Pointer(&sa.raw), SizeofSockaddrCtl, nil 138 } 139 140 // SockaddrVM implements the Sockaddr interface for AF_VSOCK type sockets. 141 // SockaddrVM provides access to Darwin VM sockets: a mechanism that enables 142 // bidirectional communication between a hypervisor and its guest virtual 143 // machines. 144 type SockaddrVM struct { 145 // CID and Port specify a context ID and port address for a VM socket. 146 // Guests have a unique CID, and hosts may have a well-known CID of: 147 // - VMADDR_CID_HYPERVISOR: refers to the hypervisor process. 148 // - VMADDR_CID_LOCAL: refers to local communication (loopback). 149 // - VMADDR_CID_HOST: refers to other processes on the host. 150 CID uint32 151 Port uint32 152 raw RawSockaddrVM 153 } 154 155 func (sa *SockaddrVM) sockaddr() (unsafe.Pointer, _Socklen, error) { 156 sa.raw.Len = SizeofSockaddrVM 157 sa.raw.Family = AF_VSOCK 158 sa.raw.Port = sa.Port 159 sa.raw.Cid = sa.CID 160 161 return unsafe.Pointer(&sa.raw), SizeofSockaddrVM, nil 162 } 163 164 func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { 165 switch rsa.Addr.Family { 166 case AF_SYSTEM: 167 pp := (*RawSockaddrCtl)(unsafe.Pointer(rsa)) 168 if pp.Ss_sysaddr == AF_SYS_CONTROL { 169 sa := new(SockaddrCtl) 170 sa.ID = pp.Sc_id 171 sa.Unit = pp.Sc_unit 172 return sa, nil 173 } 174 case AF_VSOCK: 175 pp := (*RawSockaddrVM)(unsafe.Pointer(rsa)) 176 sa := &SockaddrVM{ 177 CID: pp.Cid, 178 Port: pp.Port, 179 } 180 return sa, nil 181 } 182 return nil, EAFNOSUPPORT 183 } 184 185 // Some external packages rely on SYS___SYSCTL being defined to implement their 186 // own sysctl wrappers. Provide it here, even though direct syscalls are no 187 // longer supported on darwin. 188 const SYS___SYSCTL = SYS_SYSCTL 189 190 // Translate "kern.hostname" to []_C_int{0,1,2,3}. 191 func nametomib(name string) (mib []_C_int, err error) { 192 const siz = unsafe.Sizeof(mib[0]) 193 194 // NOTE(rsc): It seems strange to set the buffer to have 195 // size CTL_MAXNAME+2 but use only CTL_MAXNAME 196 // as the size. I don't know why the +2 is here, but the 197 // kernel uses +2 for its own implementation of this function. 198 // I am scared that if we don't include the +2 here, the kernel 199 // will silently write 2 words farther than we specify 200 // and we'll get memory corruption. 201 var buf [CTL_MAXNAME + 2]_C_int 202 n := uintptr(CTL_MAXNAME) * siz 203 204 p := (*byte)(unsafe.Pointer(&buf[0])) 205 bytes, err := ByteSliceFromString(name) 206 if err != nil { 207 return nil, err 208 } 209 210 // Magic sysctl: "setting" 0.3 to a string name 211 // lets you read back the array of integers form. 212 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { 213 return nil, err 214 } 215 return buf[0 : n/siz], nil 216 } 217 218 func direntIno(buf []byte) (uint64, bool) { 219 return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) 220 } 221 222 func direntReclen(buf []byte) (uint64, bool) { 223 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) 224 } 225 226 func direntNamlen(buf []byte) (uint64, bool) { 227 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) 228 } 229 230 func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) } 231 func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) } 232 func PtraceDenyAttach() (err error) { return ptrace(PT_DENY_ATTACH, 0, 0, 0) } 233 234 //sysnb pipe(p *[2]int32) (err error) 235 236 func Pipe(p []int) (err error) { 237 if len(p) != 2 { 238 return EINVAL 239 } 240 var x [2]int32 241 err = pipe(&x) 242 if err == nil { 243 p[0] = int(x[0]) 244 p[1] = int(x[1]) 245 } 246 return 247 } 248 249 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 250 var _p0 unsafe.Pointer 251 var bufsize uintptr 252 if len(buf) > 0 { 253 _p0 = unsafe.Pointer(&buf[0]) 254 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 255 } 256 return getfsstat(_p0, bufsize, flags) 257 } 258 259 func xattrPointer(dest []byte) *byte { 260 // It's only when dest is set to NULL that the OS X implementations of 261 // getxattr() and listxattr() return the current sizes of the named attributes. 262 // An empty byte array is not sufficient. To maintain the same behaviour as the 263 // linux implementation, we wrap around the system calls and pass in NULL when 264 // dest is empty. 265 var destp *byte 266 if len(dest) > 0 { 267 destp = &dest[0] 268 } 269 return destp 270 } 271 272 //sys getxattr(path string, attr string, dest *byte, size int, position uint32, options int) (sz int, err error) 273 274 func Getxattr(path string, attr string, dest []byte) (sz int, err error) { 275 return getxattr(path, attr, xattrPointer(dest), len(dest), 0, 0) 276 } 277 278 func Lgetxattr(link string, attr string, dest []byte) (sz int, err error) { 279 return getxattr(link, attr, xattrPointer(dest), len(dest), 0, XATTR_NOFOLLOW) 280 } 281 282 //sys fgetxattr(fd int, attr string, dest *byte, size int, position uint32, options int) (sz int, err error) 283 284 func Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) { 285 return fgetxattr(fd, attr, xattrPointer(dest), len(dest), 0, 0) 286 } 287 288 //sys setxattr(path string, attr string, data *byte, size int, position uint32, options int) (err error) 289 290 func Setxattr(path string, attr string, data []byte, flags int) (err error) { 291 // The parameters for the OS X implementation vary slightly compared to the 292 // linux system call, specifically the position parameter: 293 // 294 // linux: 295 // int setxattr( 296 // const char *path, 297 // const char *name, 298 // const void *value, 299 // size_t size, 300 // int flags 301 // ); 302 // 303 // darwin: 304 // int setxattr( 305 // const char *path, 306 // const char *name, 307 // void *value, 308 // size_t size, 309 // u_int32_t position, 310 // int options 311 // ); 312 // 313 // position specifies the offset within the extended attribute. In the 314 // current implementation, only the resource fork extended attribute makes 315 // use of this argument. For all others, position is reserved. We simply 316 // default to setting it to zero. 317 return setxattr(path, attr, xattrPointer(data), len(data), 0, flags) 318 } 319 320 func Lsetxattr(link string, attr string, data []byte, flags int) (err error) { 321 return setxattr(link, attr, xattrPointer(data), len(data), 0, flags|XATTR_NOFOLLOW) 322 } 323 324 //sys fsetxattr(fd int, attr string, data *byte, size int, position uint32, options int) (err error) 325 326 func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) { 327 return fsetxattr(fd, attr, xattrPointer(data), len(data), 0, 0) 328 } 329 330 //sys removexattr(path string, attr string, options int) (err error) 331 332 func Removexattr(path string, attr string) (err error) { 333 // We wrap around and explicitly zero out the options provided to the OS X 334 // implementation of removexattr, we do so for interoperability with the 335 // linux variant. 336 return removexattr(path, attr, 0) 337 } 338 339 func Lremovexattr(link string, attr string) (err error) { 340 return removexattr(link, attr, XATTR_NOFOLLOW) 341 } 342 343 //sys fremovexattr(fd int, attr string, options int) (err error) 344 345 func Fremovexattr(fd int, attr string) (err error) { 346 return fremovexattr(fd, attr, 0) 347 } 348 349 //sys listxattr(path string, dest *byte, size int, options int) (sz int, err error) 350 351 func Listxattr(path string, dest []byte) (sz int, err error) { 352 return listxattr(path, xattrPointer(dest), len(dest), 0) 353 } 354 355 func Llistxattr(link string, dest []byte) (sz int, err error) { 356 return listxattr(link, xattrPointer(dest), len(dest), XATTR_NOFOLLOW) 357 } 358 359 //sys flistxattr(fd int, dest *byte, size int, options int) (sz int, err error) 360 361 func Flistxattr(fd int, dest []byte) (sz int, err error) { 362 return flistxattr(fd, xattrPointer(dest), len(dest), 0) 363 } 364 365 //sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) 366 367 /* 368 * Wrapped 369 */ 370 371 //sys fcntl(fd int, cmd int, arg int) (val int, err error) 372 373 //sys kill(pid int, signum int, posix int) (err error) 374 375 func Kill(pid int, signum syscall.Signal) (err error) { return kill(pid, int(signum), 1) } 376 377 //sys ioctl(fd int, req uint, arg uintptr) (err error) 378 //sys ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_IOCTL 379 380 func IoctlCtlInfo(fd int, ctlInfo *CtlInfo) error { 381 return ioctlPtr(fd, CTLIOCGINFO, unsafe.Pointer(ctlInfo)) 382 } 383 384 // IfreqMTU is struct ifreq used to get or set a network device's MTU. 385 type IfreqMTU struct { 386 Name [IFNAMSIZ]byte 387 MTU int32 388 } 389 390 // IoctlGetIfreqMTU performs the SIOCGIFMTU ioctl operation on fd to get the MTU 391 // of the network device specified by ifname. 392 func IoctlGetIfreqMTU(fd int, ifname string) (*IfreqMTU, error) { 393 var ifreq IfreqMTU 394 copy(ifreq.Name[:], ifname) 395 err := ioctlPtr(fd, SIOCGIFMTU, unsafe.Pointer(&ifreq)) 396 return &ifreq, err 397 } 398 399 // IoctlSetIfreqMTU performs the SIOCSIFMTU ioctl operation on fd to set the MTU 400 // of the network device specified by ifreq.Name. 401 func IoctlSetIfreqMTU(fd int, ifreq *IfreqMTU) error { 402 return ioctlPtr(fd, SIOCSIFMTU, unsafe.Pointer(ifreq)) 403 } 404 405 //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS_SYSCTL 406 407 func Uname(uname *Utsname) error { 408 mib := []_C_int{CTL_KERN, KERN_OSTYPE} 409 n := unsafe.Sizeof(uname.Sysname) 410 if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil { 411 return err 412 } 413 414 mib = []_C_int{CTL_KERN, KERN_HOSTNAME} 415 n = unsafe.Sizeof(uname.Nodename) 416 if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil { 417 return err 418 } 419 420 mib = []_C_int{CTL_KERN, KERN_OSRELEASE} 421 n = unsafe.Sizeof(uname.Release) 422 if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil { 423 return err 424 } 425 426 mib = []_C_int{CTL_KERN, KERN_VERSION} 427 n = unsafe.Sizeof(uname.Version) 428 if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil { 429 return err 430 } 431 432 // The version might have newlines or tabs in it, convert them to 433 // spaces. 434 for i, b := range uname.Version { 435 if b == '\n' || b == '\t' { 436 if i == len(uname.Version)-1 { 437 uname.Version[i] = 0 438 } else { 439 uname.Version[i] = ' ' 440 } 441 } 442 } 443 444 mib = []_C_int{CTL_HW, HW_MACHINE} 445 n = unsafe.Sizeof(uname.Machine) 446 if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil { 447 return err 448 } 449 450 return nil 451 } 452 453 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { 454 if raceenabled { 455 raceReleaseMerge(unsafe.Pointer(&ioSync)) 456 } 457 var length = int64(count) 458 err = sendfile(infd, outfd, *offset, &length, nil, 0) 459 written = int(length) 460 return 461 } 462 463 func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) { 464 var value IPMreqn 465 vallen := _Socklen(SizeofIPMreqn) 466 errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 467 return &value, errno 468 } 469 470 func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) { 471 return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq)) 472 } 473 474 // GetsockoptXucred is a getsockopt wrapper that returns an Xucred struct. 475 // The usual level and opt are SOL_LOCAL and LOCAL_PEERCRED, respectively. 476 func GetsockoptXucred(fd, level, opt int) (*Xucred, error) { 477 x := new(Xucred) 478 vallen := _Socklen(SizeofXucred) 479 err := getsockopt(fd, level, opt, unsafe.Pointer(x), &vallen) 480 return x, err 481 } 482 483 func GetsockoptTCPConnectionInfo(fd, level, opt int) (*TCPConnectionInfo, error) { 484 var value TCPConnectionInfo 485 vallen := _Socklen(SizeofTCPConnectionInfo) 486 err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 487 return &value, err 488 } 489 490 func SysctlKinfoProc(name string, args ...int) (*KinfoProc, error) { 491 mib, err := sysctlmib(name, args...) 492 if err != nil { 493 return nil, err 494 } 495 496 var kinfo KinfoProc 497 n := uintptr(SizeofKinfoProc) 498 if err := sysctl(mib, (*byte)(unsafe.Pointer(&kinfo)), &n, nil, 0); err != nil { 499 return nil, err 500 } 501 if n != SizeofKinfoProc { 502 return nil, EIO 503 } 504 return &kinfo, nil 505 } 506 507 func SysctlKinfoProcSlice(name string, args ...int) ([]KinfoProc, error) { 508 mib, err := sysctlmib(name, args...) 509 if err != nil { 510 return nil, err 511 } 512 513 for { 514 // Find size. 515 n := uintptr(0) 516 if err := sysctl(mib, nil, &n, nil, 0); err != nil { 517 return nil, err 518 } 519 if n == 0 { 520 return nil, nil 521 } 522 if n%SizeofKinfoProc != 0 { 523 return nil, fmt.Errorf("sysctl() returned a size of %d, which is not a multiple of %d", n, SizeofKinfoProc) 524 } 525 526 // Read into buffer of that size. 527 buf := make([]KinfoProc, n/SizeofKinfoProc) 528 if err := sysctl(mib, (*byte)(unsafe.Pointer(&buf[0])), &n, nil, 0); err != nil { 529 if err == ENOMEM { 530 // Process table grew. Try again. 531 continue 532 } 533 return nil, err 534 } 535 if n%SizeofKinfoProc != 0 { 536 return nil, fmt.Errorf("sysctl() returned a size of %d, which is not a multiple of %d", n, SizeofKinfoProc) 537 } 538 539 // The actual call may return less than the original reported required 540 // size so ensure we deal with that. 541 return buf[:n/SizeofKinfoProc], nil 542 } 543 } 544 545 //sys sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error) 546 547 //sys shmat(id int, addr uintptr, flag int) (ret uintptr, err error) 548 //sys shmctl(id int, cmd int, buf *SysvShmDesc) (result int, err error) 549 //sys shmdt(addr uintptr) (err error) 550 //sys shmget(key int, size int, flag int) (id int, err error) 551 552 /* 553 * Exposed directly 554 */ 555 //sys Access(path string, mode uint32) (err error) 556 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 557 //sys Chdir(path string) (err error) 558 //sys Chflags(path string, flags int) (err error) 559 //sys Chmod(path string, mode uint32) (err error) 560 //sys Chown(path string, uid int, gid int) (err error) 561 //sys Chroot(path string) (err error) 562 //sys ClockGettime(clockid int32, time *Timespec) (err error) 563 //sys Close(fd int) (err error) 564 //sys Clonefile(src string, dst string, flags int) (err error) 565 //sys Clonefileat(srcDirfd int, src string, dstDirfd int, dst string, flags int) (err error) 566 //sys Dup(fd int) (nfd int, err error) 567 //sys Dup2(from int, to int) (err error) 568 //sys Exchangedata(path1 string, path2 string, options int) (err error) 569 //sys Exit(code int) 570 //sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) 571 //sys Fchdir(fd int) (err error) 572 //sys Fchflags(fd int, flags int) (err error) 573 //sys Fchmod(fd int, mode uint32) (err error) 574 //sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) 575 //sys Fchown(fd int, uid int, gid int) (err error) 576 //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) 577 //sys Fclonefileat(srcDirfd int, dstDirfd int, dst string, flags int) (err error) 578 //sys Flock(fd int, how int) (err error) 579 //sys Fpathconf(fd int, name int) (val int, err error) 580 //sys Fsync(fd int) (err error) 581 //sys Ftruncate(fd int, length int64) (err error) 582 //sys Getcwd(buf []byte) (n int, err error) 583 //sys Getdtablesize() (size int) 584 //sysnb Getegid() (egid int) 585 //sysnb Geteuid() (uid int) 586 //sysnb Getgid() (gid int) 587 //sysnb Getpgid(pid int) (pgid int, err error) 588 //sysnb Getpgrp() (pgrp int) 589 //sysnb Getpid() (pid int) 590 //sysnb Getppid() (ppid int) 591 //sys Getpriority(which int, who int) (prio int, err error) 592 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 593 //sysnb Getrusage(who int, rusage *Rusage) (err error) 594 //sysnb Getsid(pid int) (sid int, err error) 595 //sysnb Gettimeofday(tp *Timeval) (err error) 596 //sysnb Getuid() (uid int) 597 //sysnb Issetugid() (tainted bool) 598 //sys Kqueue() (fd int, err error) 599 //sys Lchown(path string, uid int, gid int) (err error) 600 //sys Link(path string, link string) (err error) 601 //sys Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error) 602 //sys Listen(s int, backlog int) (err error) 603 //sys Mkdir(path string, mode uint32) (err error) 604 //sys Mkdirat(dirfd int, path string, mode uint32) (err error) 605 //sys Mkfifo(path string, mode uint32) (err error) 606 //sys Mknod(path string, mode uint32, dev int) (err error) 607 //sys Mount(fsType string, dir string, flags int, data unsafe.Pointer) (err error) 608 //sys Open(path string, mode int, perm uint32) (fd int, err error) 609 //sys Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) 610 //sys Pathconf(path string, name int) (val int, err error) 611 //sys pread(fd int, p []byte, offset int64) (n int, err error) 612 //sys pwrite(fd int, p []byte, offset int64) (n int, err error) 613 //sys read(fd int, p []byte) (n int, err error) 614 //sys Readlink(path string, buf []byte) (n int, err error) 615 //sys Readlinkat(dirfd int, path string, buf []byte) (n int, err error) 616 //sys Rename(from string, to string) (err error) 617 //sys Renameat(fromfd int, from string, tofd int, to string) (err error) 618 //sys Revoke(path string) (err error) 619 //sys Rmdir(path string) (err error) 620 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 621 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) 622 //sys Setattrlist(path string, attrlist *Attrlist, attrBuf []byte, options int) (err error) 623 //sys Setegid(egid int) (err error) 624 //sysnb Seteuid(euid int) (err error) 625 //sysnb Setgid(gid int) (err error) 626 //sys Setlogin(name string) (err error) 627 //sysnb Setpgid(pid int, pgid int) (err error) 628 //sys Setpriority(which int, who int, prio int) (err error) 629 //sys Setprivexec(flag int) (err error) 630 //sysnb Setregid(rgid int, egid int) (err error) 631 //sysnb Setreuid(ruid int, euid int) (err error) 632 //sysnb Setsid() (pid int, err error) 633 //sysnb Settimeofday(tp *Timeval) (err error) 634 //sysnb Setuid(uid int) (err error) 635 //sys Symlink(path string, link string) (err error) 636 //sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error) 637 //sys Sync() (err error) 638 //sys Truncate(path string, length int64) (err error) 639 //sys Umask(newmask int) (oldmask int) 640 //sys Undelete(path string) (err error) 641 //sys Unlink(path string) (err error) 642 //sys Unlinkat(dirfd int, path string, flags int) (err error) 643 //sys Unmount(path string, flags int) (err error) 644 //sys write(fd int, p []byte) (n int, err error) 645 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 646 //sys munmap(addr uintptr, length uintptr) (err error) 647