github.com/dolotech/hongbao@v0.0.0-20191130105438-fd59d7a5dda5/src/golang.org/x/sys/unix/syscall_linux.go (about) 1 // Copyright 2009 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 // Linux 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 10 // wrap it in our own nicer implementation. 11 12 package unix 13 14 import ( 15 "syscall" 16 "unsafe" 17 ) 18 19 /* 20 * Wrapped 21 */ 22 23 func Access(path string, mode uint32) (err error) { 24 return Faccessat(AT_FDCWD, path, mode, 0) 25 } 26 27 func Chmod(path string, mode uint32) (err error) { 28 return Fchmodat(AT_FDCWD, path, mode, 0) 29 } 30 31 func Chown(path string, uid int, gid int) (err error) { 32 return Fchownat(AT_FDCWD, path, uid, gid, 0) 33 } 34 35 func Creat(path string, mode uint32) (fd int, err error) { 36 return Open(path, O_CREAT|O_WRONLY|O_TRUNC, mode) 37 } 38 39 //sys fchmodat(dirfd int, path string, mode uint32) (err error) 40 41 func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) { 42 // Linux fchmodat doesn't support the flags parameter. Mimick glibc's behavior 43 // and check the flags. Otherwise the mode would be applied to the symlink 44 // destination which is not what the user expects. 45 if flags&^AT_SYMLINK_NOFOLLOW != 0 { 46 return EINVAL 47 } else if flags&AT_SYMLINK_NOFOLLOW != 0 { 48 return EOPNOTSUPP 49 } 50 return fchmodat(dirfd, path, mode) 51 } 52 53 //sys ioctl(fd int, req uint, arg uintptr) (err error) 54 55 // ioctl itself should not be exposed directly, but additional get/set 56 // functions for specific types are permissible. 57 58 // IoctlSetInt performs an ioctl operation which sets an integer value 59 // on fd, using the specified request number. 60 func IoctlSetInt(fd int, req uint, value int) error { 61 return ioctl(fd, req, uintptr(value)) 62 } 63 64 func IoctlSetWinsize(fd int, req uint, value *Winsize) error { 65 return ioctl(fd, req, uintptr(unsafe.Pointer(value))) 66 } 67 68 func IoctlSetTermios(fd int, req uint, value *Termios) error { 69 return ioctl(fd, req, uintptr(unsafe.Pointer(value))) 70 } 71 72 // IoctlGetInt performs an ioctl operation which gets an integer value 73 // from fd, using the specified request number. 74 func IoctlGetInt(fd int, req uint) (int, error) { 75 var value int 76 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 77 return value, err 78 } 79 80 func IoctlGetWinsize(fd int, req uint) (*Winsize, error) { 81 var value Winsize 82 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 83 return &value, err 84 } 85 86 func IoctlGetTermios(fd int, req uint) (*Termios, error) { 87 var value Termios 88 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 89 return &value, err 90 } 91 92 //sys Linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flags int) (err error) 93 94 func Link(oldpath string, newpath string) (err error) { 95 return Linkat(AT_FDCWD, oldpath, AT_FDCWD, newpath, 0) 96 } 97 98 func Mkdir(path string, mode uint32) (err error) { 99 return Mkdirat(AT_FDCWD, path, mode) 100 } 101 102 func Mknod(path string, mode uint32, dev int) (err error) { 103 return Mknodat(AT_FDCWD, path, mode, dev) 104 } 105 106 func Open(path string, mode int, perm uint32) (fd int, err error) { 107 return openat(AT_FDCWD, path, mode|O_LARGEFILE, perm) 108 } 109 110 //sys openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) 111 112 func Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) { 113 return openat(dirfd, path, flags|O_LARGEFILE, mode) 114 } 115 116 //sys ppoll(fds *PollFd, nfds int, timeout *Timespec, sigmask *Sigset_t) (n int, err error) 117 118 func Ppoll(fds []PollFd, timeout *Timespec, sigmask *Sigset_t) (n int, err error) { 119 if len(fds) == 0 { 120 return ppoll(nil, 0, timeout, sigmask) 121 } 122 return ppoll(&fds[0], len(fds), timeout, sigmask) 123 } 124 125 //sys Readlinkat(dirfd int, path string, buf []byte) (n int, err error) 126 127 func Readlink(path string, buf []byte) (n int, err error) { 128 return Readlinkat(AT_FDCWD, path, buf) 129 } 130 131 func Rename(oldpath string, newpath string) (err error) { 132 return Renameat(AT_FDCWD, oldpath, AT_FDCWD, newpath) 133 } 134 135 func Rmdir(path string) error { 136 return Unlinkat(AT_FDCWD, path, AT_REMOVEDIR) 137 } 138 139 //sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error) 140 141 func Symlink(oldpath string, newpath string) (err error) { 142 return Symlinkat(oldpath, AT_FDCWD, newpath) 143 } 144 145 func Unlink(path string) error { 146 return Unlinkat(AT_FDCWD, path, 0) 147 } 148 149 //sys Unlinkat(dirfd int, path string, flags int) (err error) 150 151 //sys utimes(path string, times *[2]Timeval) (err error) 152 153 func Utimes(path string, tv []Timeval) error { 154 if tv == nil { 155 err := utimensat(AT_FDCWD, path, nil, 0) 156 if err != ENOSYS { 157 return err 158 } 159 return utimes(path, nil) 160 } 161 if len(tv) != 2 { 162 return EINVAL 163 } 164 var ts [2]Timespec 165 ts[0] = NsecToTimespec(TimevalToNsec(tv[0])) 166 ts[1] = NsecToTimespec(TimevalToNsec(tv[1])) 167 err := utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) 168 if err != ENOSYS { 169 return err 170 } 171 return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) 172 } 173 174 //sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) 175 176 func UtimesNano(path string, ts []Timespec) error { 177 if ts == nil { 178 err := utimensat(AT_FDCWD, path, nil, 0) 179 if err != ENOSYS { 180 return err 181 } 182 return utimes(path, nil) 183 } 184 if len(ts) != 2 { 185 return EINVAL 186 } 187 err := utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) 188 if err != ENOSYS { 189 return err 190 } 191 // If the utimensat syscall isn't available (utimensat was added to Linux 192 // in 2.6.22, Released, 8 July 2007) then fall back to utimes 193 var tv [2]Timeval 194 for i := 0; i < 2; i++ { 195 tv[i] = NsecToTimeval(TimespecToNsec(ts[i])) 196 } 197 return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) 198 } 199 200 func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error { 201 if ts == nil { 202 return utimensat(dirfd, path, nil, flags) 203 } 204 if len(ts) != 2 { 205 return EINVAL 206 } 207 return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags) 208 } 209 210 //sys futimesat(dirfd int, path *byte, times *[2]Timeval) (err error) 211 212 func Futimesat(dirfd int, path string, tv []Timeval) error { 213 pathp, err := BytePtrFromString(path) 214 if err != nil { 215 return err 216 } 217 if tv == nil { 218 return futimesat(dirfd, pathp, nil) 219 } 220 if len(tv) != 2 { 221 return EINVAL 222 } 223 return futimesat(dirfd, pathp, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) 224 } 225 226 func Futimes(fd int, tv []Timeval) (err error) { 227 // Believe it or not, this is the best we can do on Linux 228 // (and is what glibc does). 229 return Utimes("/proc/self/fd/"+itoa(fd), tv) 230 } 231 232 const ImplementsGetwd = true 233 234 //sys Getcwd(buf []byte) (n int, err error) 235 236 func Getwd() (wd string, err error) { 237 var buf [PathMax]byte 238 n, err := Getcwd(buf[0:]) 239 if err != nil { 240 return "", err 241 } 242 // Getcwd returns the number of bytes written to buf, including the NUL. 243 if n < 1 || n > len(buf) || buf[n-1] != 0 { 244 return "", EINVAL 245 } 246 return string(buf[0 : n-1]), nil 247 } 248 249 func Getgroups() (gids []int, err error) { 250 n, err := getgroups(0, nil) 251 if err != nil { 252 return nil, err 253 } 254 if n == 0 { 255 return nil, nil 256 } 257 258 // Sanity check group count. Max is 1<<16 on Linux. 259 if n < 0 || n > 1<<20 { 260 return nil, EINVAL 261 } 262 263 a := make([]_Gid_t, n) 264 n, err = getgroups(n, &a[0]) 265 if err != nil { 266 return nil, err 267 } 268 gids = make([]int, n) 269 for i, v := range a[0:n] { 270 gids[i] = int(v) 271 } 272 return 273 } 274 275 func Setgroups(gids []int) (err error) { 276 if len(gids) == 0 { 277 return setgroups(0, nil) 278 } 279 280 a := make([]_Gid_t, len(gids)) 281 for i, v := range gids { 282 a[i] = _Gid_t(v) 283 } 284 return setgroups(len(a), &a[0]) 285 } 286 287 type WaitStatus uint32 288 289 // Wait status is 7 bits at bottom, either 0 (exited), 290 // 0x7F (stopped), or a signal number that caused an exit. 291 // The 0x80 bit is whether there was a core dump. 292 // An extra number (exit code, signal causing a stop) 293 // is in the high bits. At least that's the idea. 294 // There are various irregularities. For example, the 295 // "continued" status is 0xFFFF, distinguishing itself 296 // from stopped via the core dump bit. 297 298 const ( 299 mask = 0x7F 300 core = 0x80 301 exited = 0x00 302 stopped = 0x7F 303 shift = 8 304 ) 305 306 func (w WaitStatus) Exited() bool { return w&mask == exited } 307 308 func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != exited } 309 310 func (w WaitStatus) Stopped() bool { return w&0xFF == stopped } 311 312 func (w WaitStatus) Continued() bool { return w == 0xFFFF } 313 314 func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 } 315 316 func (w WaitStatus) ExitStatus() int { 317 if !w.Exited() { 318 return -1 319 } 320 return int(w>>shift) & 0xFF 321 } 322 323 func (w WaitStatus) Signal() syscall.Signal { 324 if !w.Signaled() { 325 return -1 326 } 327 return syscall.Signal(w & mask) 328 } 329 330 func (w WaitStatus) StopSignal() syscall.Signal { 331 if !w.Stopped() { 332 return -1 333 } 334 return syscall.Signal(w>>shift) & 0xFF 335 } 336 337 func (w WaitStatus) TrapCause() int { 338 if w.StopSignal() != SIGTRAP { 339 return -1 340 } 341 return int(w>>shift) >> 8 342 } 343 344 //sys wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) 345 346 func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) { 347 var status _C_int 348 wpid, err = wait4(pid, &status, options, rusage) 349 if wstatus != nil { 350 *wstatus = WaitStatus(status) 351 } 352 return 353 } 354 355 func Mkfifo(path string, mode uint32) error { 356 return Mknod(path, mode|S_IFIFO, 0) 357 } 358 359 func Mkfifoat(dirfd int, path string, mode uint32) error { 360 return Mknodat(dirfd, path, mode|S_IFIFO, 0) 361 } 362 363 func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { 364 if sa.Port < 0 || sa.Port > 0xFFFF { 365 return nil, 0, EINVAL 366 } 367 sa.raw.Family = AF_INET 368 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) 369 p[0] = byte(sa.Port >> 8) 370 p[1] = byte(sa.Port) 371 for i := 0; i < len(sa.Addr); i++ { 372 sa.raw.Addr[i] = sa.Addr[i] 373 } 374 return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil 375 } 376 377 func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) { 378 if sa.Port < 0 || sa.Port > 0xFFFF { 379 return nil, 0, EINVAL 380 } 381 sa.raw.Family = AF_INET6 382 p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) 383 p[0] = byte(sa.Port >> 8) 384 p[1] = byte(sa.Port) 385 sa.raw.Scope_id = sa.ZoneId 386 for i := 0; i < len(sa.Addr); i++ { 387 sa.raw.Addr[i] = sa.Addr[i] 388 } 389 return unsafe.Pointer(&sa.raw), SizeofSockaddrInet6, nil 390 } 391 392 func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) { 393 name := sa.Name 394 n := len(name) 395 if n >= len(sa.raw.Path) { 396 return nil, 0, EINVAL 397 } 398 sa.raw.Family = AF_UNIX 399 for i := 0; i < n; i++ { 400 sa.raw.Path[i] = int8(name[i]) 401 } 402 // length is family (uint16), name, NUL. 403 sl := _Socklen(2) 404 if n > 0 { 405 sl += _Socklen(n) + 1 406 } 407 if sa.raw.Path[0] == '@' { 408 sa.raw.Path[0] = 0 409 // Don't count trailing NUL for abstract address. 410 sl-- 411 } 412 413 return unsafe.Pointer(&sa.raw), sl, nil 414 } 415 416 type SockaddrLinklayer struct { 417 Protocol uint16 418 Ifindex int 419 Hatype uint16 420 Pkttype uint8 421 Halen uint8 422 Addr [8]byte 423 raw RawSockaddrLinklayer 424 } 425 426 func (sa *SockaddrLinklayer) sockaddr() (unsafe.Pointer, _Socklen, error) { 427 if sa.Ifindex < 0 || sa.Ifindex > 0x7fffffff { 428 return nil, 0, EINVAL 429 } 430 sa.raw.Family = AF_PACKET 431 sa.raw.Protocol = sa.Protocol 432 sa.raw.Ifindex = int32(sa.Ifindex) 433 sa.raw.Hatype = sa.Hatype 434 sa.raw.Pkttype = sa.Pkttype 435 sa.raw.Halen = sa.Halen 436 for i := 0; i < len(sa.Addr); i++ { 437 sa.raw.Addr[i] = sa.Addr[i] 438 } 439 return unsafe.Pointer(&sa.raw), SizeofSockaddrLinklayer, nil 440 } 441 442 type SockaddrNetlink struct { 443 Family uint16 444 Pad uint16 445 Pid uint32 446 Groups uint32 447 raw RawSockaddrNetlink 448 } 449 450 func (sa *SockaddrNetlink) sockaddr() (unsafe.Pointer, _Socklen, error) { 451 sa.raw.Family = AF_NETLINK 452 sa.raw.Pad = sa.Pad 453 sa.raw.Pid = sa.Pid 454 sa.raw.Groups = sa.Groups 455 return unsafe.Pointer(&sa.raw), SizeofSockaddrNetlink, nil 456 } 457 458 type SockaddrHCI struct { 459 Dev uint16 460 Channel uint16 461 raw RawSockaddrHCI 462 } 463 464 func (sa *SockaddrHCI) sockaddr() (unsafe.Pointer, _Socklen, error) { 465 sa.raw.Family = AF_BLUETOOTH 466 sa.raw.Dev = sa.Dev 467 sa.raw.Channel = sa.Channel 468 return unsafe.Pointer(&sa.raw), SizeofSockaddrHCI, nil 469 } 470 471 // SockaddrCAN implements the Sockaddr interface for AF_CAN type sockets. 472 // The RxID and TxID fields are used for transport protocol addressing in 473 // (CAN_TP16, CAN_TP20, CAN_MCNET, and CAN_ISOTP), they can be left with 474 // zero values for CAN_RAW and CAN_BCM sockets as they have no meaning. 475 // 476 // The SockaddrCAN struct must be bound to the socket file descriptor 477 // using Bind before the CAN socket can be used. 478 // 479 // // Read one raw CAN frame 480 // fd, _ := Socket(AF_CAN, SOCK_RAW, CAN_RAW) 481 // addr := &SockaddrCAN{Ifindex: index} 482 // Bind(fd, addr) 483 // frame := make([]byte, 16) 484 // Read(fd, frame) 485 // 486 // The full SocketCAN documentation can be found in the linux kernel 487 // archives at: https://www.kernel.org/doc/Documentation/networking/can.txt 488 type SockaddrCAN struct { 489 Ifindex int 490 RxID uint32 491 TxID uint32 492 raw RawSockaddrCAN 493 } 494 495 func (sa *SockaddrCAN) sockaddr() (unsafe.Pointer, _Socklen, error) { 496 if sa.Ifindex < 0 || sa.Ifindex > 0x7fffffff { 497 return nil, 0, EINVAL 498 } 499 sa.raw.Family = AF_CAN 500 sa.raw.Ifindex = int32(sa.Ifindex) 501 rx := (*[4]byte)(unsafe.Pointer(&sa.RxID)) 502 for i := 0; i < 4; i++ { 503 sa.raw.Addr[i] = rx[i] 504 } 505 tx := (*[4]byte)(unsafe.Pointer(&sa.TxID)) 506 for i := 0; i < 4; i++ { 507 sa.raw.Addr[i+4] = tx[i] 508 } 509 return unsafe.Pointer(&sa.raw), SizeofSockaddrCAN, nil 510 } 511 512 // SockaddrALG implements the Sockaddr interface for AF_ALG type sockets. 513 // SockaddrALG enables userspace access to the Linux kernel's cryptography 514 // subsystem. The Type and Name fields specify which type of hash or cipher 515 // should be used with a given socket. 516 // 517 // To create a file descriptor that provides access to a hash or cipher, both 518 // Bind and Accept must be used. Once the setup process is complete, input 519 // data can be written to the socket, processed by the kernel, and then read 520 // back as hash output or ciphertext. 521 // 522 // Here is an example of using an AF_ALG socket with SHA1 hashing. 523 // The initial socket setup process is as follows: 524 // 525 // // Open a socket to perform SHA1 hashing. 526 // fd, _ := unix.Socket(unix.AF_ALG, unix.SOCK_SEQPACKET, 0) 527 // addr := &unix.SockaddrALG{Type: "hash", Name: "sha1"} 528 // unix.Bind(fd, addr) 529 // // Note: unix.Accept does not work at this time; must invoke accept() 530 // // manually using unix.Syscall. 531 // hashfd, _, _ := unix.Syscall(unix.SYS_ACCEPT, uintptr(fd), 0, 0) 532 // 533 // Once a file descriptor has been returned from Accept, it may be used to 534 // perform SHA1 hashing. The descriptor is not safe for concurrent use, but 535 // may be re-used repeatedly with subsequent Write and Read operations. 536 // 537 // When hashing a small byte slice or string, a single Write and Read may 538 // be used: 539 // 540 // // Assume hashfd is already configured using the setup process. 541 // hash := os.NewFile(hashfd, "sha1") 542 // // Hash an input string and read the results. Each Write discards 543 // // previous hash state. Read always reads the current state. 544 // b := make([]byte, 20) 545 // for i := 0; i < 2; i++ { 546 // io.WriteString(hash, "Hello, world.") 547 // hash.Read(b) 548 // fmt.Println(hex.EncodeToString(b)) 549 // } 550 // // Output: 551 // // 2ae01472317d1935a84797ec1983ae243fc6aa28 552 // // 2ae01472317d1935a84797ec1983ae243fc6aa28 553 // 554 // For hashing larger byte slices, or byte streams such as those read from 555 // a file or socket, use Sendto with MSG_MORE to instruct the kernel to update 556 // the hash digest instead of creating a new one for a given chunk and finalizing it. 557 // 558 // // Assume hashfd and addr are already configured using the setup process. 559 // hash := os.NewFile(hashfd, "sha1") 560 // // Hash the contents of a file. 561 // f, _ := os.Open("/tmp/linux-4.10-rc7.tar.xz") 562 // b := make([]byte, 4096) 563 // for { 564 // n, err := f.Read(b) 565 // if err == io.EOF { 566 // break 567 // } 568 // unix.Sendto(hashfd, b[:n], unix.MSG_MORE, addr) 569 // } 570 // hash.Read(b) 571 // fmt.Println(hex.EncodeToString(b)) 572 // // Output: 85cdcad0c06eef66f805ecce353bec9accbeecc5 573 // 574 // For more information, see: http://www.chronox.de/crypto-API/crypto/userspace-if.html. 575 type SockaddrALG struct { 576 Type string 577 Name string 578 Feature uint32 579 Mask uint32 580 raw RawSockaddrALG 581 } 582 583 func (sa *SockaddrALG) sockaddr() (unsafe.Pointer, _Socklen, error) { 584 // Leave room for NUL byte terminator. 585 if len(sa.Type) > 13 { 586 return nil, 0, EINVAL 587 } 588 if len(sa.Name) > 63 { 589 return nil, 0, EINVAL 590 } 591 592 sa.raw.Family = AF_ALG 593 sa.raw.Feat = sa.Feature 594 sa.raw.Mask = sa.Mask 595 596 typ, err := ByteSliceFromString(sa.Type) 597 if err != nil { 598 return nil, 0, err 599 } 600 name, err := ByteSliceFromString(sa.Name) 601 if err != nil { 602 return nil, 0, err 603 } 604 605 copy(sa.raw.Type[:], typ) 606 copy(sa.raw.Name[:], name) 607 608 return unsafe.Pointer(&sa.raw), SizeofSockaddrALG, nil 609 } 610 611 // SockaddrVM implements the Sockaddr interface for AF_VSOCK type sockets. 612 // SockaddrVM provides access to Linux VM sockets: a mechanism that enables 613 // bidirectional communication between a hypervisor and its guest virtual 614 // machines. 615 type SockaddrVM struct { 616 // CID and Port specify a context ID and port address for a VM socket. 617 // Guests have a unique CID, and hosts may have a well-known CID of: 618 // - VMADDR_CID_HYPERVISOR: refers to the hypervisor process. 619 // - VMADDR_CID_HOST: refers to other processes on the host. 620 CID uint32 621 Port uint32 622 raw RawSockaddrVM 623 } 624 625 func (sa *SockaddrVM) sockaddr() (unsafe.Pointer, _Socklen, error) { 626 sa.raw.Family = AF_VSOCK 627 sa.raw.Port = sa.Port 628 sa.raw.Cid = sa.CID 629 630 return unsafe.Pointer(&sa.raw), SizeofSockaddrVM, nil 631 } 632 633 func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, error) { 634 switch rsa.Addr.Family { 635 case AF_NETLINK: 636 pp := (*RawSockaddrNetlink)(unsafe.Pointer(rsa)) 637 sa := new(SockaddrNetlink) 638 sa.Family = pp.Family 639 sa.Pad = pp.Pad 640 sa.Pid = pp.Pid 641 sa.Groups = pp.Groups 642 return sa, nil 643 644 case AF_PACKET: 645 pp := (*RawSockaddrLinklayer)(unsafe.Pointer(rsa)) 646 sa := new(SockaddrLinklayer) 647 sa.Protocol = pp.Protocol 648 sa.Ifindex = int(pp.Ifindex) 649 sa.Hatype = pp.Hatype 650 sa.Pkttype = pp.Pkttype 651 sa.Halen = pp.Halen 652 for i := 0; i < len(sa.Addr); i++ { 653 sa.Addr[i] = pp.Addr[i] 654 } 655 return sa, nil 656 657 case AF_UNIX: 658 pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) 659 sa := new(SockaddrUnix) 660 if pp.Path[0] == 0 { 661 // "Abstract" Unix domain socket. 662 // Rewrite leading NUL as @ for textual display. 663 // (This is the standard convention.) 664 // Not friendly to overwrite in place, 665 // but the callers below don't care. 666 pp.Path[0] = '@' 667 } 668 669 // Assume path ends at NUL. 670 // This is not technically the Linux semantics for 671 // abstract Unix domain sockets--they are supposed 672 // to be uninterpreted fixed-size binary blobs--but 673 // everyone uses this convention. 674 n := 0 675 for n < len(pp.Path) && pp.Path[n] != 0 { 676 n++ 677 } 678 bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n] 679 sa.Name = string(bytes) 680 return sa, nil 681 682 case AF_INET: 683 pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) 684 sa := new(SockaddrInet4) 685 p := (*[2]byte)(unsafe.Pointer(&pp.Port)) 686 sa.Port = int(p[0])<<8 + int(p[1]) 687 for i := 0; i < len(sa.Addr); i++ { 688 sa.Addr[i] = pp.Addr[i] 689 } 690 return sa, nil 691 692 case AF_INET6: 693 pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) 694 sa := new(SockaddrInet6) 695 p := (*[2]byte)(unsafe.Pointer(&pp.Port)) 696 sa.Port = int(p[0])<<8 + int(p[1]) 697 sa.ZoneId = pp.Scope_id 698 for i := 0; i < len(sa.Addr); i++ { 699 sa.Addr[i] = pp.Addr[i] 700 } 701 return sa, nil 702 703 case AF_VSOCK: 704 pp := (*RawSockaddrVM)(unsafe.Pointer(rsa)) 705 sa := &SockaddrVM{ 706 CID: pp.Cid, 707 Port: pp.Port, 708 } 709 return sa, nil 710 } 711 return nil, EAFNOSUPPORT 712 } 713 714 func Accept(fd int) (nfd int, sa Sockaddr, err error) { 715 var rsa RawSockaddrAny 716 var len _Socklen = SizeofSockaddrAny 717 nfd, err = accept(fd, &rsa, &len) 718 if err != nil { 719 return 720 } 721 sa, err = anyToSockaddr(&rsa) 722 if err != nil { 723 Close(nfd) 724 nfd = 0 725 } 726 return 727 } 728 729 func Accept4(fd int, flags int) (nfd int, sa Sockaddr, err error) { 730 var rsa RawSockaddrAny 731 var len _Socklen = SizeofSockaddrAny 732 nfd, err = accept4(fd, &rsa, &len, flags) 733 if err != nil { 734 return 735 } 736 if len > SizeofSockaddrAny { 737 panic("RawSockaddrAny too small") 738 } 739 sa, err = anyToSockaddr(&rsa) 740 if err != nil { 741 Close(nfd) 742 nfd = 0 743 } 744 return 745 } 746 747 func Getsockname(fd int) (sa Sockaddr, err error) { 748 var rsa RawSockaddrAny 749 var len _Socklen = SizeofSockaddrAny 750 if err = getsockname(fd, &rsa, &len); err != nil { 751 return 752 } 753 return anyToSockaddr(&rsa) 754 } 755 756 func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) { 757 vallen := _Socklen(4) 758 err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen) 759 return value, err 760 } 761 762 func GetsockoptIPMreq(fd, level, opt int) (*IPMreq, error) { 763 var value IPMreq 764 vallen := _Socklen(SizeofIPMreq) 765 err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 766 return &value, err 767 } 768 769 func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) { 770 var value IPMreqn 771 vallen := _Socklen(SizeofIPMreqn) 772 err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 773 return &value, err 774 } 775 776 func GetsockoptIPv6Mreq(fd, level, opt int) (*IPv6Mreq, error) { 777 var value IPv6Mreq 778 vallen := _Socklen(SizeofIPv6Mreq) 779 err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 780 return &value, err 781 } 782 783 func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) { 784 var value IPv6MTUInfo 785 vallen := _Socklen(SizeofIPv6MTUInfo) 786 err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 787 return &value, err 788 } 789 790 func GetsockoptICMPv6Filter(fd, level, opt int) (*ICMPv6Filter, error) { 791 var value ICMPv6Filter 792 vallen := _Socklen(SizeofICMPv6Filter) 793 err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 794 return &value, err 795 } 796 797 func GetsockoptUcred(fd, level, opt int) (*Ucred, error) { 798 var value Ucred 799 vallen := _Socklen(SizeofUcred) 800 err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 801 return &value, err 802 } 803 804 func GetsockoptTCPInfo(fd, level, opt int) (*TCPInfo, error) { 805 var value TCPInfo 806 vallen := _Socklen(SizeofTCPInfo) 807 err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 808 return &value, err 809 } 810 811 func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) { 812 return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq)) 813 } 814 815 // Keyctl Commands (http://man7.org/linux/man-pages/man2/keyctl.2.html) 816 817 // KeyctlInt calls keyctl commands in which each argument is an int. 818 // These commands are KEYCTL_REVOKE, KEYCTL_CHOWN, KEYCTL_CLEAR, KEYCTL_LINK, 819 // KEYCTL_UNLINK, KEYCTL_NEGATE, KEYCTL_SET_REQKEY_KEYRING, KEYCTL_SET_TIMEOUT, 820 // KEYCTL_ASSUME_AUTHORITY, KEYCTL_SESSION_TO_PARENT, KEYCTL_REJECT, 821 // KEYCTL_INVALIDATE, and KEYCTL_GET_PERSISTENT. 822 //sys KeyctlInt(cmd int, arg2 int, arg3 int, arg4 int, arg5 int) (ret int, err error) = SYS_KEYCTL 823 824 // KeyctlBuffer calls keyctl commands in which the third and fourth 825 // arguments are a buffer and its length, respectively. 826 // These commands are KEYCTL_UPDATE, KEYCTL_READ, and KEYCTL_INSTANTIATE. 827 //sys KeyctlBuffer(cmd int, arg2 int, buf []byte, arg5 int) (ret int, err error) = SYS_KEYCTL 828 829 // KeyctlString calls keyctl commands which return a string. 830 // These commands are KEYCTL_DESCRIBE and KEYCTL_GET_SECURITY. 831 func KeyctlString(cmd int, id int) (string, error) { 832 // We must loop as the string data may change in between the syscalls. 833 // We could allocate a large buffer here to reduce the chance that the 834 // syscall needs to be called twice; however, this is unnecessary as 835 // the performance loss is negligible. 836 var buffer []byte 837 for { 838 // Try to fill the buffer with data 839 length, err := KeyctlBuffer(cmd, id, buffer, 0) 840 if err != nil { 841 return "", err 842 } 843 844 // Check if the data was written 845 if length <= len(buffer) { 846 // Exclude the null terminator 847 return string(buffer[:length-1]), nil 848 } 849 850 // Make a bigger buffer if needed 851 buffer = make([]byte, length) 852 } 853 } 854 855 // Keyctl commands with special signatures. 856 857 // KeyctlGetKeyringID implements the KEYCTL_GET_KEYRING_ID command. 858 // See the full documentation at: 859 // http://man7.org/linux/man-pages/man3/keyctl_get_keyring_ID.3.html 860 func KeyctlGetKeyringID(id int, create bool) (ringid int, err error) { 861 createInt := 0 862 if create { 863 createInt = 1 864 } 865 return KeyctlInt(KEYCTL_GET_KEYRING_ID, id, createInt, 0, 0) 866 } 867 868 // KeyctlSetperm implements the KEYCTL_SETPERM command. The perm value is the 869 // key handle permission mask as described in the "keyctl setperm" section of 870 // http://man7.org/linux/man-pages/man1/keyctl.1.html. 871 // See the full documentation at: 872 // http://man7.org/linux/man-pages/man3/keyctl_setperm.3.html 873 func KeyctlSetperm(id int, perm uint32) error { 874 _, err := KeyctlInt(KEYCTL_SETPERM, id, int(perm), 0, 0) 875 return err 876 } 877 878 //sys keyctlJoin(cmd int, arg2 string) (ret int, err error) = SYS_KEYCTL 879 880 // KeyctlJoinSessionKeyring implements the KEYCTL_JOIN_SESSION_KEYRING command. 881 // See the full documentation at: 882 // http://man7.org/linux/man-pages/man3/keyctl_join_session_keyring.3.html 883 func KeyctlJoinSessionKeyring(name string) (ringid int, err error) { 884 return keyctlJoin(KEYCTL_JOIN_SESSION_KEYRING, name) 885 } 886 887 //sys keyctlSearch(cmd int, arg2 int, arg3 string, arg4 string, arg5 int) (ret int, err error) = SYS_KEYCTL 888 889 // KeyctlSearch implements the KEYCTL_SEARCH command. 890 // See the full documentation at: 891 // http://man7.org/linux/man-pages/man3/keyctl_search.3.html 892 func KeyctlSearch(ringid int, keyType, description string, destRingid int) (id int, err error) { 893 return keyctlSearch(KEYCTL_SEARCH, ringid, keyType, description, destRingid) 894 } 895 896 //sys keyctlIOV(cmd int, arg2 int, payload []Iovec, arg5 int) (err error) = SYS_KEYCTL 897 898 // KeyctlInstantiateIOV implements the KEYCTL_INSTANTIATE_IOV command. This 899 // command is similar to KEYCTL_INSTANTIATE, except that the payload is a slice 900 // of Iovec (each of which represents a buffer) instead of a single buffer. 901 // See the full documentation at: 902 // http://man7.org/linux/man-pages/man3/keyctl_instantiate_iov.3.html 903 func KeyctlInstantiateIOV(id int, payload []Iovec, ringid int) error { 904 return keyctlIOV(KEYCTL_INSTANTIATE_IOV, id, payload, ringid) 905 } 906 907 //sys keyctlDH(cmd int, arg2 *KeyctlDHParams, buf []byte) (ret int, err error) = SYS_KEYCTL 908 909 // KeyctlDHCompute implements the KEYCTL_DH_COMPUTE command. This command 910 // computes a Diffie-Hellman shared secret based on the provide params. The 911 // secret is written to the provided buffer and the returned size is the number 912 // of bytes written (returning an error if there is insufficient space in the 913 // buffer). If a nil buffer is passed in, this function returns the minimum 914 // buffer length needed to store the appropriate data. Note that this differs 915 // from KEYCTL_READ's behavior which always returns the requested payload size. 916 // See the full documentation at: 917 // http://man7.org/linux/man-pages/man3/keyctl_dh_compute.3.html 918 func KeyctlDHCompute(params *KeyctlDHParams, buffer []byte) (size int, err error) { 919 return keyctlDH(KEYCTL_DH_COMPUTE, params, buffer) 920 } 921 922 func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { 923 var msg Msghdr 924 var rsa RawSockaddrAny 925 msg.Name = (*byte)(unsafe.Pointer(&rsa)) 926 msg.Namelen = uint32(SizeofSockaddrAny) 927 var iov Iovec 928 if len(p) > 0 { 929 iov.Base = (*byte)(unsafe.Pointer(&p[0])) 930 iov.SetLen(len(p)) 931 } 932 var dummy byte 933 if len(oob) > 0 { 934 var sockType int 935 sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE) 936 if err != nil { 937 return 938 } 939 // receive at least one normal byte 940 if sockType != SOCK_DGRAM && len(p) == 0 { 941 iov.Base = &dummy 942 iov.SetLen(1) 943 } 944 msg.Control = (*byte)(unsafe.Pointer(&oob[0])) 945 msg.SetControllen(len(oob)) 946 } 947 msg.Iov = &iov 948 msg.Iovlen = 1 949 if n, err = recvmsg(fd, &msg, flags); err != nil { 950 return 951 } 952 oobn = int(msg.Controllen) 953 recvflags = int(msg.Flags) 954 // source address is only specified if the socket is unconnected 955 if rsa.Addr.Family != AF_UNSPEC { 956 from, err = anyToSockaddr(&rsa) 957 } 958 return 959 } 960 961 func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { 962 _, err = SendmsgN(fd, p, oob, to, flags) 963 return 964 } 965 966 func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { 967 var ptr unsafe.Pointer 968 var salen _Socklen 969 if to != nil { 970 var err error 971 ptr, salen, err = to.sockaddr() 972 if err != nil { 973 return 0, err 974 } 975 } 976 var msg Msghdr 977 msg.Name = (*byte)(unsafe.Pointer(ptr)) 978 msg.Namelen = uint32(salen) 979 var iov Iovec 980 if len(p) > 0 { 981 iov.Base = (*byte)(unsafe.Pointer(&p[0])) 982 iov.SetLen(len(p)) 983 } 984 var dummy byte 985 if len(oob) > 0 { 986 var sockType int 987 sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE) 988 if err != nil { 989 return 0, err 990 } 991 // send at least one normal byte 992 if sockType != SOCK_DGRAM && len(p) == 0 { 993 iov.Base = &dummy 994 iov.SetLen(1) 995 } 996 msg.Control = (*byte)(unsafe.Pointer(&oob[0])) 997 msg.SetControllen(len(oob)) 998 } 999 msg.Iov = &iov 1000 msg.Iovlen = 1 1001 if n, err = sendmsg(fd, &msg, flags); err != nil { 1002 return 0, err 1003 } 1004 if len(oob) > 0 && len(p) == 0 { 1005 n = 0 1006 } 1007 return n, nil 1008 } 1009 1010 // BindToDevice binds the socket associated with fd to device. 1011 func BindToDevice(fd int, device string) (err error) { 1012 return SetsockoptString(fd, SOL_SOCKET, SO_BINDTODEVICE, device) 1013 } 1014 1015 //sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error) 1016 1017 func ptracePeek(req int, pid int, addr uintptr, out []byte) (count int, err error) { 1018 // The peek requests are machine-size oriented, so we wrap it 1019 // to retrieve arbitrary-length data. 1020 1021 // The ptrace syscall differs from glibc's ptrace. 1022 // Peeks returns the word in *data, not as the return value. 1023 1024 var buf [sizeofPtr]byte 1025 1026 // Leading edge. PEEKTEXT/PEEKDATA don't require aligned 1027 // access (PEEKUSER warns that it might), but if we don't 1028 // align our reads, we might straddle an unmapped page 1029 // boundary and not get the bytes leading up to the page 1030 // boundary. 1031 n := 0 1032 if addr%sizeofPtr != 0 { 1033 err = ptrace(req, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) 1034 if err != nil { 1035 return 0, err 1036 } 1037 n += copy(out, buf[addr%sizeofPtr:]) 1038 out = out[n:] 1039 } 1040 1041 // Remainder. 1042 for len(out) > 0 { 1043 // We use an internal buffer to guarantee alignment. 1044 // It's not documented if this is necessary, but we're paranoid. 1045 err = ptrace(req, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) 1046 if err != nil { 1047 return n, err 1048 } 1049 copied := copy(out, buf[0:]) 1050 n += copied 1051 out = out[copied:] 1052 } 1053 1054 return n, nil 1055 } 1056 1057 func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) { 1058 return ptracePeek(PTRACE_PEEKTEXT, pid, addr, out) 1059 } 1060 1061 func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) { 1062 return ptracePeek(PTRACE_PEEKDATA, pid, addr, out) 1063 } 1064 1065 func PtracePeekUser(pid int, addr uintptr, out []byte) (count int, err error) { 1066 return ptracePeek(PTRACE_PEEKUSR, pid, addr, out) 1067 } 1068 1069 func ptracePoke(pokeReq int, peekReq int, pid int, addr uintptr, data []byte) (count int, err error) { 1070 // As for ptracePeek, we need to align our accesses to deal 1071 // with the possibility of straddling an invalid page. 1072 1073 // Leading edge. 1074 n := 0 1075 if addr%sizeofPtr != 0 { 1076 var buf [sizeofPtr]byte 1077 err = ptrace(peekReq, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) 1078 if err != nil { 1079 return 0, err 1080 } 1081 n += copy(buf[addr%sizeofPtr:], data) 1082 word := *((*uintptr)(unsafe.Pointer(&buf[0]))) 1083 err = ptrace(pokeReq, pid, addr-addr%sizeofPtr, word) 1084 if err != nil { 1085 return 0, err 1086 } 1087 data = data[n:] 1088 } 1089 1090 // Interior. 1091 for len(data) > sizeofPtr { 1092 word := *((*uintptr)(unsafe.Pointer(&data[0]))) 1093 err = ptrace(pokeReq, pid, addr+uintptr(n), word) 1094 if err != nil { 1095 return n, err 1096 } 1097 n += sizeofPtr 1098 data = data[sizeofPtr:] 1099 } 1100 1101 // Trailing edge. 1102 if len(data) > 0 { 1103 var buf [sizeofPtr]byte 1104 err = ptrace(peekReq, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) 1105 if err != nil { 1106 return n, err 1107 } 1108 copy(buf[0:], data) 1109 word := *((*uintptr)(unsafe.Pointer(&buf[0]))) 1110 err = ptrace(pokeReq, pid, addr+uintptr(n), word) 1111 if err != nil { 1112 return n, err 1113 } 1114 n += len(data) 1115 } 1116 1117 return n, nil 1118 } 1119 1120 func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) { 1121 return ptracePoke(PTRACE_POKETEXT, PTRACE_PEEKTEXT, pid, addr, data) 1122 } 1123 1124 func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) { 1125 return ptracePoke(PTRACE_POKEDATA, PTRACE_PEEKDATA, pid, addr, data) 1126 } 1127 1128 func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) { 1129 return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout))) 1130 } 1131 1132 func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) { 1133 return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs))) 1134 } 1135 1136 func PtraceSetOptions(pid int, options int) (err error) { 1137 return ptrace(PTRACE_SETOPTIONS, pid, 0, uintptr(options)) 1138 } 1139 1140 func PtraceGetEventMsg(pid int) (msg uint, err error) { 1141 var data _C_long 1142 err = ptrace(PTRACE_GETEVENTMSG, pid, 0, uintptr(unsafe.Pointer(&data))) 1143 msg = uint(data) 1144 return 1145 } 1146 1147 func PtraceCont(pid int, signal int) (err error) { 1148 return ptrace(PTRACE_CONT, pid, 0, uintptr(signal)) 1149 } 1150 1151 func PtraceSyscall(pid int, signal int) (err error) { 1152 return ptrace(PTRACE_SYSCALL, pid, 0, uintptr(signal)) 1153 } 1154 1155 func PtraceSingleStep(pid int) (err error) { return ptrace(PTRACE_SINGLESTEP, pid, 0, 0) } 1156 1157 func PtraceAttach(pid int) (err error) { return ptrace(PTRACE_ATTACH, pid, 0, 0) } 1158 1159 func PtraceDetach(pid int) (err error) { return ptrace(PTRACE_DETACH, pid, 0, 0) } 1160 1161 //sys reboot(magic1 uint, magic2 uint, cmd int, arg string) (err error) 1162 1163 func Reboot(cmd int) (err error) { 1164 return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, "") 1165 } 1166 1167 func ReadDirent(fd int, buf []byte) (n int, err error) { 1168 return Getdents(fd, buf) 1169 } 1170 1171 func direntIno(buf []byte) (uint64, bool) { 1172 return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) 1173 } 1174 1175 func direntReclen(buf []byte) (uint64, bool) { 1176 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) 1177 } 1178 1179 func direntNamlen(buf []byte) (uint64, bool) { 1180 reclen, ok := direntReclen(buf) 1181 if !ok { 1182 return 0, false 1183 } 1184 return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true 1185 } 1186 1187 //sys mount(source string, target string, fstype string, flags uintptr, data *byte) (err error) 1188 1189 func Mount(source string, target string, fstype string, flags uintptr, data string) (err error) { 1190 // Certain file systems get rather angry and EINVAL if you give 1191 // them an empty string of data, rather than NULL. 1192 if data == "" { 1193 return mount(source, target, fstype, flags, nil) 1194 } 1195 datap, err := BytePtrFromString(data) 1196 if err != nil { 1197 return err 1198 } 1199 return mount(source, target, fstype, flags, datap) 1200 } 1201 1202 // Sendto 1203 // Recvfrom 1204 // Socketpair 1205 1206 /* 1207 * Direct access 1208 */ 1209 //sys Acct(path string) (err error) 1210 //sys AddKey(keyType string, description string, payload []byte, ringid int) (id int, err error) 1211 //sys Adjtimex(buf *Timex) (state int, err error) 1212 //sys Chdir(path string) (err error) 1213 //sys Chroot(path string) (err error) 1214 //sys ClockGettime(clockid int32, time *Timespec) (err error) 1215 //sys Close(fd int) (err error) 1216 //sys CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) 1217 //sys Dup(oldfd int) (fd int, err error) 1218 //sys Dup3(oldfd int, newfd int, flags int) (err error) 1219 //sysnb EpollCreate(size int) (fd int, err error) 1220 //sysnb EpollCreate1(flag int) (fd int, err error) 1221 //sysnb EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) 1222 //sys Eventfd(initval uint, flags int) (fd int, err error) = SYS_EVENTFD2 1223 //sys Exit(code int) = SYS_EXIT_GROUP 1224 //sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) 1225 //sys Fallocate(fd int, mode uint32, off int64, len int64) (err error) 1226 //sys Fchdir(fd int) (err error) 1227 //sys Fchmod(fd int, mode uint32) (err error) 1228 //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) 1229 //sys fcntl(fd int, cmd int, arg int) (val int, err error) 1230 //sys Fdatasync(fd int) (err error) 1231 //sys Flock(fd int, how int) (err error) 1232 //sys Fsync(fd int) (err error) 1233 //sys Getdents(fd int, buf []byte) (n int, err error) = SYS_GETDENTS64 1234 //sysnb Getpgid(pid int) (pgid int, err error) 1235 1236 func Getpgrp() (pid int) { 1237 pid, _ = Getpgid(0) 1238 return 1239 } 1240 1241 //sysnb Getpid() (pid int) 1242 //sysnb Getppid() (ppid int) 1243 //sys Getpriority(which int, who int) (prio int, err error) 1244 //sys Getrandom(buf []byte, flags int) (n int, err error) 1245 //sysnb Getrusage(who int, rusage *Rusage) (err error) 1246 //sysnb Getsid(pid int) (sid int, err error) 1247 //sysnb Gettid() (tid int) 1248 //sys Getxattr(path string, attr string, dest []byte) (sz int, err error) 1249 //sys InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error) 1250 //sysnb InotifyInit1(flags int) (fd int, err error) 1251 //sysnb InotifyRmWatch(fd int, watchdesc uint32) (success int, err error) 1252 //sysnb Kill(pid int, sig syscall.Signal) (err error) 1253 //sys Klogctl(typ int, buf []byte) (n int, err error) = SYS_SYSLOG 1254 //sys Lgetxattr(path string, attr string, dest []byte) (sz int, err error) 1255 //sys Listxattr(path string, dest []byte) (sz int, err error) 1256 //sys Llistxattr(path string, dest []byte) (sz int, err error) 1257 //sys Lremovexattr(path string, attr string) (err error) 1258 //sys Lsetxattr(path string, attr string, data []byte, flags int) (err error) 1259 //sys Mkdirat(dirfd int, path string, mode uint32) (err error) 1260 //sys Mknodat(dirfd int, path string, mode uint32, dev int) (err error) 1261 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) 1262 //sys PivotRoot(newroot string, putold string) (err error) = SYS_PIVOT_ROOT 1263 //sysnb prlimit(pid int, resource int, newlimit *Rlimit, old *Rlimit) (err error) = SYS_PRLIMIT64 1264 //sys Prctl(option int, arg2 uintptr, arg3 uintptr, arg4 uintptr, arg5 uintptr) (err error) 1265 //sys read(fd int, p []byte) (n int, err error) 1266 //sys Removexattr(path string, attr string) (err error) 1267 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) 1268 //sys RequestKey(keyType string, description string, callback string, destRingid int) (id int, err error) 1269 //sys Setdomainname(p []byte) (err error) 1270 //sys Sethostname(p []byte) (err error) 1271 //sysnb Setpgid(pid int, pgid int) (err error) 1272 //sysnb Setsid() (pid int, err error) 1273 //sysnb Settimeofday(tv *Timeval) (err error) 1274 //sys Setns(fd int, nstype int) (err error) 1275 1276 // issue 1435. 1277 // On linux Setuid and Setgid only affects the current thread, not the process. 1278 // This does not match what most callers expect so we must return an error 1279 // here rather than letting the caller think that the call succeeded. 1280 1281 func Setuid(uid int) (err error) { 1282 return EOPNOTSUPP 1283 } 1284 1285 func Setgid(uid int) (err error) { 1286 return EOPNOTSUPP 1287 } 1288 1289 //sys Setpriority(which int, who int, prio int) (err error) 1290 //sys Setxattr(path string, attr string, data []byte, flags int) (err error) 1291 //sys Sync() 1292 //sys Syncfs(fd int) (err error) 1293 //sysnb Sysinfo(info *Sysinfo_t) (err error) 1294 //sys Tee(rfd int, wfd int, len int, flags int) (n int64, err error) 1295 //sysnb Tgkill(tgid int, tid int, sig syscall.Signal) (err error) 1296 //sysnb Times(tms *Tms) (ticks uintptr, err error) 1297 //sysnb Umask(mask int) (oldmask int) 1298 //sysnb Uname(buf *Utsname) (err error) 1299 //sys Unmount(target string, flags int) (err error) = SYS_UMOUNT2 1300 //sys Unshare(flags int) (err error) 1301 //sys Ustat(dev int, ubuf *Ustat_t) (err error) 1302 //sys write(fd int, p []byte) (n int, err error) 1303 //sys exitThread(code int) (err error) = SYS_EXIT 1304 //sys readlen(fd int, p *byte, np int) (n int, err error) = SYS_READ 1305 //sys writelen(fd int, p *byte, np int) (n int, err error) = SYS_WRITE 1306 1307 // mmap varies by architecture; see syscall_linux_*.go. 1308 //sys munmap(addr uintptr, length uintptr) (err error) 1309 1310 var mapper = &mmapper{ 1311 active: make(map[*byte][]byte), 1312 mmap: mmap, 1313 munmap: munmap, 1314 } 1315 1316 func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { 1317 return mapper.Mmap(fd, offset, length, prot, flags) 1318 } 1319 1320 func Munmap(b []byte) (err error) { 1321 return mapper.Munmap(b) 1322 } 1323 1324 //sys Madvise(b []byte, advice int) (err error) 1325 //sys Mprotect(b []byte, prot int) (err error) 1326 //sys Mlock(b []byte) (err error) 1327 //sys Mlockall(flags int) (err error) 1328 //sys Msync(b []byte, flags int) (err error) 1329 //sys Munlock(b []byte) (err error) 1330 //sys Munlockall() (err error) 1331 1332 // Vmsplice splices user pages from a slice of Iovecs into a pipe specified by fd, 1333 // using the specified flags. 1334 func Vmsplice(fd int, iovs []Iovec, flags int) (int, error) { 1335 n, _, errno := Syscall6( 1336 SYS_VMSPLICE, 1337 uintptr(fd), 1338 uintptr(unsafe.Pointer(&iovs[0])), 1339 uintptr(len(iovs)), 1340 uintptr(flags), 1341 0, 1342 0, 1343 ) 1344 if errno != 0 { 1345 return 0, syscall.Errno(errno) 1346 } 1347 1348 return int(n), nil 1349 } 1350 1351 /* 1352 * Unimplemented 1353 */ 1354 // AfsSyscall 1355 // Alarm 1356 // ArchPrctl 1357 // Brk 1358 // Capget 1359 // Capset 1360 // ClockGetres 1361 // ClockNanosleep 1362 // ClockSettime 1363 // Clone 1364 // CreateModule 1365 // DeleteModule 1366 // EpollCtlOld 1367 // EpollPwait 1368 // EpollWaitOld 1369 // Execve 1370 // Fgetxattr 1371 // Flistxattr 1372 // Fork 1373 // Fremovexattr 1374 // Fsetxattr 1375 // Futex 1376 // GetKernelSyms 1377 // GetMempolicy 1378 // GetRobustList 1379 // GetThreadArea 1380 // Getitimer 1381 // Getpmsg 1382 // IoCancel 1383 // IoDestroy 1384 // IoGetevents 1385 // IoSetup 1386 // IoSubmit 1387 // IoprioGet 1388 // IoprioSet 1389 // KexecLoad 1390 // LookupDcookie 1391 // Mbind 1392 // MigratePages 1393 // Mincore 1394 // ModifyLdt 1395 // Mount 1396 // MovePages 1397 // MqGetsetattr 1398 // MqNotify 1399 // MqOpen 1400 // MqTimedreceive 1401 // MqTimedsend 1402 // MqUnlink 1403 // Mremap 1404 // Msgctl 1405 // Msgget 1406 // Msgrcv 1407 // Msgsnd 1408 // Newfstatat 1409 // Nfsservctl 1410 // Personality 1411 // Pselect6 1412 // Ptrace 1413 // Putpmsg 1414 // QueryModule 1415 // Quotactl 1416 // Readahead 1417 // Readv 1418 // RemapFilePages 1419 // RestartSyscall 1420 // RtSigaction 1421 // RtSigpending 1422 // RtSigprocmask 1423 // RtSigqueueinfo 1424 // RtSigreturn 1425 // RtSigsuspend 1426 // RtSigtimedwait 1427 // SchedGetPriorityMax 1428 // SchedGetPriorityMin 1429 // SchedGetaffinity 1430 // SchedGetparam 1431 // SchedGetscheduler 1432 // SchedRrGetInterval 1433 // SchedSetaffinity 1434 // SchedSetparam 1435 // SchedYield 1436 // Security 1437 // Semctl 1438 // Semget 1439 // Semop 1440 // Semtimedop 1441 // SetMempolicy 1442 // SetRobustList 1443 // SetThreadArea 1444 // SetTidAddress 1445 // Shmat 1446 // Shmctl 1447 // Shmdt 1448 // Shmget 1449 // Sigaltstack 1450 // Signalfd 1451 // Swapoff 1452 // Swapon 1453 // Sysfs 1454 // TimerCreate 1455 // TimerDelete 1456 // TimerGetoverrun 1457 // TimerGettime 1458 // TimerSettime 1459 // Timerfd 1460 // Tkill (obsolete) 1461 // Tuxcall 1462 // Umount2 1463 // Uselib 1464 // Utimensat 1465 // Vfork 1466 // Vhangup 1467 // Vserver 1468 // Waitid 1469 // _Sysctl