rss-tools/vendor/golang.org/x/sys/unix/syscall_solaris.go (view raw)
| 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 | // Solaris 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_solaris.go or syscall_unix.go. |
| 12 | |
| 13 | package unix |
| 14 | |
| 15 | import ( |
| 16 | "fmt" |
| 17 | "os" |
| 18 | "runtime" |
| 19 | "sync" |
| 20 | "syscall" |
| 21 | "unsafe" |
| 22 | ) |
| 23 | |
| 24 | // Implemented in runtime/syscall_solaris.go. |
| 25 | type syscallFunc uintptr |
| 26 | |
| 27 | func rawSysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) |
| 28 | func sysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) |
| 29 | |
| 30 | // SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets. |
| 31 | type SockaddrDatalink struct { |
| 32 | Family uint16 |
| 33 | Index uint16 |
| 34 | Type uint8 |
| 35 | Nlen uint8 |
| 36 | Alen uint8 |
| 37 | Slen uint8 |
| 38 | Data [244]int8 |
| 39 | raw RawSockaddrDatalink |
| 40 | } |
| 41 | |
| 42 | func direntIno(buf []byte) (uint64, bool) { |
| 43 | return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) |
| 44 | } |
| 45 | |
| 46 | func direntReclen(buf []byte) (uint64, bool) { |
| 47 | return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) |
| 48 | } |
| 49 | |
| 50 | func direntNamlen(buf []byte) (uint64, bool) { |
| 51 | reclen, ok := direntReclen(buf) |
| 52 | if !ok { |
| 53 | return 0, false |
| 54 | } |
| 55 | return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true |
| 56 | } |
| 57 | |
| 58 | //sysnb pipe(p *[2]_C_int) (n int, err error) |
| 59 | |
| 60 | func Pipe(p []int) (err error) { |
| 61 | if len(p) != 2 { |
| 62 | return EINVAL |
| 63 | } |
| 64 | var pp [2]_C_int |
| 65 | n, err := pipe(&pp) |
| 66 | if n != 0 { |
| 67 | return err |
| 68 | } |
| 69 | if err == nil { |
| 70 | p[0] = int(pp[0]) |
| 71 | p[1] = int(pp[1]) |
| 72 | } |
| 73 | return nil |
| 74 | } |
| 75 | |
| 76 | //sysnb pipe2(p *[2]_C_int, flags int) (err error) |
| 77 | |
| 78 | func Pipe2(p []int, flags int) error { |
| 79 | if len(p) != 2 { |
| 80 | return EINVAL |
| 81 | } |
| 82 | var pp [2]_C_int |
| 83 | err := pipe2(&pp, flags) |
| 84 | if err == nil { |
| 85 | p[0] = int(pp[0]) |
| 86 | p[1] = int(pp[1]) |
| 87 | } |
| 88 | return err |
| 89 | } |
| 90 | |
| 91 | func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 92 | if sa.Port < 0 || sa.Port > 0xFFFF { |
| 93 | return nil, 0, EINVAL |
| 94 | } |
| 95 | sa.raw.Family = AF_INET |
| 96 | p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) |
| 97 | p[0] = byte(sa.Port >> 8) |
| 98 | p[1] = byte(sa.Port) |
| 99 | sa.raw.Addr = sa.Addr |
| 100 | return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil |
| 101 | } |
| 102 | |
| 103 | func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 104 | if sa.Port < 0 || sa.Port > 0xFFFF { |
| 105 | return nil, 0, EINVAL |
| 106 | } |
| 107 | sa.raw.Family = AF_INET6 |
| 108 | p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) |
| 109 | p[0] = byte(sa.Port >> 8) |
| 110 | p[1] = byte(sa.Port) |
| 111 | sa.raw.Scope_id = sa.ZoneId |
| 112 | sa.raw.Addr = sa.Addr |
| 113 | return unsafe.Pointer(&sa.raw), SizeofSockaddrInet6, nil |
| 114 | } |
| 115 | |
| 116 | func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 117 | name := sa.Name |
| 118 | n := len(name) |
| 119 | if n >= len(sa.raw.Path) { |
| 120 | return nil, 0, EINVAL |
| 121 | } |
| 122 | sa.raw.Family = AF_UNIX |
| 123 | for i := 0; i < n; i++ { |
| 124 | sa.raw.Path[i] = int8(name[i]) |
| 125 | } |
| 126 | // length is family (uint16), name, NUL. |
| 127 | sl := _Socklen(2) |
| 128 | if n > 0 { |
| 129 | sl += _Socklen(n) + 1 |
| 130 | } |
| 131 | if sa.raw.Path[0] == '@' || (sa.raw.Path[0] == 0 && sl > 3) { |
| 132 | // Check sl > 3 so we don't change unnamed socket behavior. |
| 133 | sa.raw.Path[0] = 0 |
| 134 | // Don't count trailing NUL for abstract address. |
| 135 | sl-- |
| 136 | } |
| 137 | |
| 138 | return unsafe.Pointer(&sa.raw), sl, nil |
| 139 | } |
| 140 | |
| 141 | //sys getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = libsocket.getsockname |
| 142 | |
| 143 | func Getsockname(fd int) (sa Sockaddr, err error) { |
| 144 | var rsa RawSockaddrAny |
| 145 | var len _Socklen = SizeofSockaddrAny |
| 146 | if err = getsockname(fd, &rsa, &len); err != nil { |
| 147 | return |
| 148 | } |
| 149 | return anyToSockaddr(fd, &rsa) |
| 150 | } |
| 151 | |
| 152 | // GetsockoptString returns the string value of the socket option opt for the |
| 153 | // socket associated with fd at the given socket level. |
| 154 | func GetsockoptString(fd, level, opt int) (string, error) { |
| 155 | buf := make([]byte, 256) |
| 156 | vallen := _Socklen(len(buf)) |
| 157 | err := getsockopt(fd, level, opt, unsafe.Pointer(&buf[0]), &vallen) |
| 158 | if err != nil { |
| 159 | return "", err |
| 160 | } |
| 161 | return ByteSliceToString(buf[:vallen]), nil |
| 162 | } |
| 163 | |
| 164 | const ImplementsGetwd = true |
| 165 | |
| 166 | //sys Getcwd(buf []byte) (n int, err error) |
| 167 | |
| 168 | func Getwd() (wd string, err error) { |
| 169 | var buf [PathMax]byte |
| 170 | // Getcwd will return an error if it failed for any reason. |
| 171 | _, err = Getcwd(buf[0:]) |
| 172 | if err != nil { |
| 173 | return "", err |
| 174 | } |
| 175 | n := clen(buf[:]) |
| 176 | if n < 1 { |
| 177 | return "", EINVAL |
| 178 | } |
| 179 | return string(buf[:n]), nil |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * Wrapped |
| 184 | */ |
| 185 | |
| 186 | //sysnb getgroups(ngid int, gid *_Gid_t) (n int, err error) |
| 187 | //sysnb setgroups(ngid int, gid *_Gid_t) (err error) |
| 188 | |
| 189 | func Getgroups() (gids []int, err error) { |
| 190 | n, err := getgroups(0, nil) |
| 191 | // Check for error and sanity check group count. Newer versions of |
| 192 | // Solaris allow up to 1024 (NGROUPS_MAX). |
| 193 | if n < 0 || n > 1024 { |
| 194 | if err != nil { |
| 195 | return nil, err |
| 196 | } |
| 197 | return nil, EINVAL |
| 198 | } else if n == 0 { |
| 199 | return nil, nil |
| 200 | } |
| 201 | |
| 202 | a := make([]_Gid_t, n) |
| 203 | n, err = getgroups(n, &a[0]) |
| 204 | if n == -1 { |
| 205 | return nil, err |
| 206 | } |
| 207 | gids = make([]int, n) |
| 208 | for i, v := range a[0:n] { |
| 209 | gids[i] = int(v) |
| 210 | } |
| 211 | return |
| 212 | } |
| 213 | |
| 214 | func Setgroups(gids []int) (err error) { |
| 215 | if len(gids) == 0 { |
| 216 | return setgroups(0, nil) |
| 217 | } |
| 218 | |
| 219 | a := make([]_Gid_t, len(gids)) |
| 220 | for i, v := range gids { |
| 221 | a[i] = _Gid_t(v) |
| 222 | } |
| 223 | return setgroups(len(a), &a[0]) |
| 224 | } |
| 225 | |
| 226 | // ReadDirent reads directory entries from fd and writes them into buf. |
| 227 | func ReadDirent(fd int, buf []byte) (n int, err error) { |
| 228 | // Final argument is (basep *uintptr) and the syscall doesn't take nil. |
| 229 | // TODO(rsc): Can we use a single global basep for all calls? |
| 230 | return Getdents(fd, buf, new(uintptr)) |
| 231 | } |
| 232 | |
| 233 | // Wait status is 7 bits at bottom, either 0 (exited), |
| 234 | // 0x7F (stopped), or a signal number that caused an exit. |
| 235 | // The 0x80 bit is whether there was a core dump. |
| 236 | // An extra number (exit code, signal causing a stop) |
| 237 | // is in the high bits. |
| 238 | |
| 239 | type WaitStatus uint32 |
| 240 | |
| 241 | const ( |
| 242 | mask = 0x7F |
| 243 | core = 0x80 |
| 244 | shift = 8 |
| 245 | |
| 246 | exited = 0 |
| 247 | stopped = 0x7F |
| 248 | ) |
| 249 | |
| 250 | func (w WaitStatus) Exited() bool { return w&mask == exited } |
| 251 | |
| 252 | func (w WaitStatus) ExitStatus() int { |
| 253 | if w&mask != exited { |
| 254 | return -1 |
| 255 | } |
| 256 | return int(w >> shift) |
| 257 | } |
| 258 | |
| 259 | func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != 0 } |
| 260 | |
| 261 | func (w WaitStatus) Signal() syscall.Signal { |
| 262 | sig := syscall.Signal(w & mask) |
| 263 | if sig == stopped || sig == 0 { |
| 264 | return -1 |
| 265 | } |
| 266 | return sig |
| 267 | } |
| 268 | |
| 269 | func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 } |
| 270 | |
| 271 | func (w WaitStatus) Stopped() bool { return w&mask == stopped && syscall.Signal(w>>shift) != SIGSTOP } |
| 272 | |
| 273 | func (w WaitStatus) Continued() bool { return w&mask == stopped && syscall.Signal(w>>shift) == SIGSTOP } |
| 274 | |
| 275 | func (w WaitStatus) StopSignal() syscall.Signal { |
| 276 | if !w.Stopped() { |
| 277 | return -1 |
| 278 | } |
| 279 | return syscall.Signal(w>>shift) & 0xFF |
| 280 | } |
| 281 | |
| 282 | func (w WaitStatus) TrapCause() int { return -1 } |
| 283 | |
| 284 | //sys wait4(pid int32, statusp *_C_int, options int, rusage *Rusage) (wpid int32, err error) |
| 285 | |
| 286 | func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (int, error) { |
| 287 | var status _C_int |
| 288 | rpid, err := wait4(int32(pid), &status, options, rusage) |
| 289 | wpid := int(rpid) |
| 290 | if wpid == -1 { |
| 291 | return wpid, err |
| 292 | } |
| 293 | if wstatus != nil { |
| 294 | *wstatus = WaitStatus(status) |
| 295 | } |
| 296 | return wpid, nil |
| 297 | } |
| 298 | |
| 299 | //sys gethostname(buf []byte) (n int, err error) |
| 300 | |
| 301 | func Gethostname() (name string, err error) { |
| 302 | var buf [MaxHostNameLen]byte |
| 303 | n, err := gethostname(buf[:]) |
| 304 | if n != 0 { |
| 305 | return "", err |
| 306 | } |
| 307 | n = clen(buf[:]) |
| 308 | if n < 1 { |
| 309 | return "", EFAULT |
| 310 | } |
| 311 | return string(buf[:n]), nil |
| 312 | } |
| 313 | |
| 314 | //sys utimes(path string, times *[2]Timeval) (err error) |
| 315 | |
| 316 | func Utimes(path string, tv []Timeval) (err error) { |
| 317 | if tv == nil { |
| 318 | return utimes(path, nil) |
| 319 | } |
| 320 | if len(tv) != 2 { |
| 321 | return EINVAL |
| 322 | } |
| 323 | return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
| 324 | } |
| 325 | |
| 326 | //sys utimensat(fd int, path string, times *[2]Timespec, flag int) (err error) |
| 327 | |
| 328 | func UtimesNano(path string, ts []Timespec) error { |
| 329 | if ts == nil { |
| 330 | return utimensat(AT_FDCWD, path, nil, 0) |
| 331 | } |
| 332 | if len(ts) != 2 { |
| 333 | return EINVAL |
| 334 | } |
| 335 | return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) |
| 336 | } |
| 337 | |
| 338 | func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error { |
| 339 | if ts == nil { |
| 340 | return utimensat(dirfd, path, nil, flags) |
| 341 | } |
| 342 | if len(ts) != 2 { |
| 343 | return EINVAL |
| 344 | } |
| 345 | return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags) |
| 346 | } |
| 347 | |
| 348 | //sys fcntl(fd int, cmd int, arg int) (val int, err error) |
| 349 | |
| 350 | // FcntlInt performs a fcntl syscall on fd with the provided command and argument. |
| 351 | func FcntlInt(fd uintptr, cmd, arg int) (int, error) { |
| 352 | valptr, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procfcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(arg), 0, 0, 0) |
| 353 | var err error |
| 354 | if errno != 0 { |
| 355 | err = errno |
| 356 | } |
| 357 | return int(valptr), err |
| 358 | } |
| 359 | |
| 360 | // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command. |
| 361 | func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error { |
| 362 | _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&procfcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(unsafe.Pointer(lk)), 0, 0, 0) |
| 363 | if e1 != 0 { |
| 364 | return e1 |
| 365 | } |
| 366 | return nil |
| 367 | } |
| 368 | |
| 369 | //sys futimesat(fildes int, path *byte, times *[2]Timeval) (err error) |
| 370 | |
| 371 | func Futimesat(dirfd int, path string, tv []Timeval) error { |
| 372 | pathp, err := BytePtrFromString(path) |
| 373 | if err != nil { |
| 374 | return err |
| 375 | } |
| 376 | if tv == nil { |
| 377 | return futimesat(dirfd, pathp, nil) |
| 378 | } |
| 379 | if len(tv) != 2 { |
| 380 | return EINVAL |
| 381 | } |
| 382 | return futimesat(dirfd, pathp, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
| 383 | } |
| 384 | |
| 385 | // Solaris doesn't have an futimes function because it allows NULL to be |
| 386 | // specified as the path for futimesat. However, Go doesn't like |
| 387 | // NULL-style string interfaces, so this simple wrapper is provided. |
| 388 | func Futimes(fd int, tv []Timeval) error { |
| 389 | if tv == nil { |
| 390 | return futimesat(fd, nil, nil) |
| 391 | } |
| 392 | if len(tv) != 2 { |
| 393 | return EINVAL |
| 394 | } |
| 395 | return futimesat(fd, nil, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
| 396 | } |
| 397 | |
| 398 | func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { |
| 399 | switch rsa.Addr.Family { |
| 400 | case AF_UNIX: |
| 401 | pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) |
| 402 | sa := new(SockaddrUnix) |
| 403 | // Assume path ends at NUL. |
| 404 | // This is not technically the Solaris semantics for |
| 405 | // abstract Unix domain sockets -- they are supposed |
| 406 | // to be uninterpreted fixed-size binary blobs -- but |
| 407 | // everyone uses this convention. |
| 408 | n := 0 |
| 409 | for n < len(pp.Path) && pp.Path[n] != 0 { |
| 410 | n++ |
| 411 | } |
| 412 | sa.Name = string(unsafe.Slice((*byte)(unsafe.Pointer(&pp.Path[0])), n)) |
| 413 | return sa, nil |
| 414 | |
| 415 | case AF_INET: |
| 416 | pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) |
| 417 | sa := new(SockaddrInet4) |
| 418 | p := (*[2]byte)(unsafe.Pointer(&pp.Port)) |
| 419 | sa.Port = int(p[0])<<8 + int(p[1]) |
| 420 | sa.Addr = pp.Addr |
| 421 | return sa, nil |
| 422 | |
| 423 | case AF_INET6: |
| 424 | pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) |
| 425 | sa := new(SockaddrInet6) |
| 426 | p := (*[2]byte)(unsafe.Pointer(&pp.Port)) |
| 427 | sa.Port = int(p[0])<<8 + int(p[1]) |
| 428 | sa.ZoneId = pp.Scope_id |
| 429 | sa.Addr = pp.Addr |
| 430 | return sa, nil |
| 431 | } |
| 432 | return nil, EAFNOSUPPORT |
| 433 | } |
| 434 | |
| 435 | //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) = libsocket.accept |
| 436 | |
| 437 | func Accept(fd int) (nfd int, sa Sockaddr, err error) { |
| 438 | var rsa RawSockaddrAny |
| 439 | var len _Socklen = SizeofSockaddrAny |
| 440 | nfd, err = accept(fd, &rsa, &len) |
| 441 | if nfd == -1 { |
| 442 | return |
| 443 | } |
| 444 | sa, err = anyToSockaddr(fd, &rsa) |
| 445 | if err != nil { |
| 446 | Close(nfd) |
| 447 | nfd = 0 |
| 448 | } |
| 449 | return |
| 450 | } |
| 451 | |
| 452 | //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = libsocket.__xnet_recvmsg |
| 453 | |
| 454 | func recvmsgRaw(fd int, iov []Iovec, oob []byte, flags int, rsa *RawSockaddrAny) (n, oobn int, recvflags int, err error) { |
| 455 | var msg Msghdr |
| 456 | msg.Name = (*byte)(unsafe.Pointer(rsa)) |
| 457 | msg.Namelen = uint32(SizeofSockaddrAny) |
| 458 | var dummy byte |
| 459 | if len(oob) > 0 { |
| 460 | // receive at least one normal byte |
| 461 | if emptyIovecs(iov) { |
| 462 | var iova [1]Iovec |
| 463 | iova[0].Base = &dummy |
| 464 | iova[0].SetLen(1) |
| 465 | iov = iova[:] |
| 466 | } |
| 467 | msg.Accrightslen = int32(len(oob)) |
| 468 | } |
| 469 | if len(iov) > 0 { |
| 470 | msg.Iov = &iov[0] |
| 471 | msg.SetIovlen(len(iov)) |
| 472 | } |
| 473 | if n, err = recvmsg(fd, &msg, flags); n == -1 { |
| 474 | return |
| 475 | } |
| 476 | oobn = int(msg.Accrightslen) |
| 477 | return |
| 478 | } |
| 479 | |
| 480 | //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = libsocket.__xnet_sendmsg |
| 481 | |
| 482 | func sendmsgN(fd int, iov []Iovec, oob []byte, ptr unsafe.Pointer, salen _Socklen, flags int) (n int, err error) { |
| 483 | var msg Msghdr |
| 484 | msg.Name = (*byte)(unsafe.Pointer(ptr)) |
| 485 | msg.Namelen = uint32(salen) |
| 486 | var dummy byte |
| 487 | var empty bool |
| 488 | if len(oob) > 0 { |
| 489 | // send at least one normal byte |
| 490 | empty = emptyIovecs(iov) |
| 491 | if empty { |
| 492 | var iova [1]Iovec |
| 493 | iova[0].Base = &dummy |
| 494 | iova[0].SetLen(1) |
| 495 | iov = iova[:] |
| 496 | } |
| 497 | msg.Accrightslen = int32(len(oob)) |
| 498 | } |
| 499 | if len(iov) > 0 { |
| 500 | msg.Iov = &iov[0] |
| 501 | msg.SetIovlen(len(iov)) |
| 502 | } |
| 503 | if n, err = sendmsg(fd, &msg, flags); err != nil { |
| 504 | return 0, err |
| 505 | } |
| 506 | if len(oob) > 0 && empty { |
| 507 | n = 0 |
| 508 | } |
| 509 | return n, nil |
| 510 | } |
| 511 | |
| 512 | //sys acct(path *byte) (err error) |
| 513 | |
| 514 | func Acct(path string) (err error) { |
| 515 | if len(path) == 0 { |
| 516 | // Assume caller wants to disable accounting. |
| 517 | return acct(nil) |
| 518 | } |
| 519 | |
| 520 | pathp, err := BytePtrFromString(path) |
| 521 | if err != nil { |
| 522 | return err |
| 523 | } |
| 524 | return acct(pathp) |
| 525 | } |
| 526 | |
| 527 | //sys __makedev(version int, major uint, minor uint) (val uint64) |
| 528 | |
| 529 | func Mkdev(major, minor uint32) uint64 { |
| 530 | return __makedev(NEWDEV, uint(major), uint(minor)) |
| 531 | } |
| 532 | |
| 533 | //sys __major(version int, dev uint64) (val uint) |
| 534 | |
| 535 | func Major(dev uint64) uint32 { |
| 536 | return uint32(__major(NEWDEV, dev)) |
| 537 | } |
| 538 | |
| 539 | //sys __minor(version int, dev uint64) (val uint) |
| 540 | |
| 541 | func Minor(dev uint64) uint32 { |
| 542 | return uint32(__minor(NEWDEV, dev)) |
| 543 | } |
| 544 | |
| 545 | /* |
| 546 | * Expose the ioctl function |
| 547 | */ |
| 548 | |
| 549 | //sys ioctlRet(fd int, req int, arg uintptr) (ret int, err error) = libc.ioctl |
| 550 | //sys ioctlPtrRet(fd int, req int, arg unsafe.Pointer) (ret int, err error) = libc.ioctl |
| 551 | |
| 552 | func ioctl(fd int, req int, arg uintptr) (err error) { |
| 553 | _, err = ioctlRet(fd, req, arg) |
| 554 | return err |
| 555 | } |
| 556 | |
| 557 | func ioctlPtr(fd int, req int, arg unsafe.Pointer) (err error) { |
| 558 | _, err = ioctlPtrRet(fd, req, arg) |
| 559 | return err |
| 560 | } |
| 561 | |
| 562 | func IoctlSetTermio(fd int, req int, value *Termio) error { |
| 563 | return ioctlPtr(fd, req, unsafe.Pointer(value)) |
| 564 | } |
| 565 | |
| 566 | func IoctlGetTermio(fd int, req int) (*Termio, error) { |
| 567 | var value Termio |
| 568 | err := ioctlPtr(fd, req, unsafe.Pointer(&value)) |
| 569 | return &value, err |
| 570 | } |
| 571 | |
| 572 | //sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) |
| 573 | |
| 574 | func Poll(fds []PollFd, timeout int) (n int, err error) { |
| 575 | if len(fds) == 0 { |
| 576 | return poll(nil, 0, timeout) |
| 577 | } |
| 578 | return poll(&fds[0], len(fds), timeout) |
| 579 | } |
| 580 | |
| 581 | func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { |
| 582 | if raceenabled { |
| 583 | raceReleaseMerge(unsafe.Pointer(&ioSync)) |
| 584 | } |
| 585 | return sendfile(outfd, infd, offset, count) |
| 586 | } |
| 587 | |
| 588 | /* |
| 589 | * Exposed directly |
| 590 | */ |
| 591 | //sys Access(path string, mode uint32) (err error) |
| 592 | //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) |
| 593 | //sys Chdir(path string) (err error) |
| 594 | //sys Chmod(path string, mode uint32) (err error) |
| 595 | //sys Chown(path string, uid int, gid int) (err error) |
| 596 | //sys Chroot(path string) (err error) |
| 597 | //sys ClockGettime(clockid int32, time *Timespec) (err error) |
| 598 | //sys Close(fd int) (err error) |
| 599 | //sys Creat(path string, mode uint32) (fd int, err error) |
| 600 | //sys Dup(fd int) (nfd int, err error) |
| 601 | //sys Dup2(oldfd int, newfd int) (err error) |
| 602 | //sys Exit(code int) |
| 603 | //sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) |
| 604 | //sys Fchdir(fd int) (err error) |
| 605 | //sys Fchmod(fd int, mode uint32) (err error) |
| 606 | //sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) |
| 607 | //sys Fchown(fd int, uid int, gid int) (err error) |
| 608 | //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) |
| 609 | //sys Fdatasync(fd int) (err error) |
| 610 | //sys Flock(fd int, how int) (err error) |
| 611 | //sys Fpathconf(fd int, name int) (val int, err error) |
| 612 | //sys Fstat(fd int, stat *Stat_t) (err error) |
| 613 | //sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) |
| 614 | //sys Fstatvfs(fd int, vfsstat *Statvfs_t) (err error) |
| 615 | //sys Getdents(fd int, buf []byte, basep *uintptr) (n int, err error) |
| 616 | //sysnb Getgid() (gid int) |
| 617 | //sysnb Getpid() (pid int) |
| 618 | //sysnb Getpgid(pid int) (pgid int, err error) |
| 619 | //sysnb Getpgrp() (pgid int, err error) |
| 620 | //sys Geteuid() (euid int) |
| 621 | //sys Getegid() (egid int) |
| 622 | //sys Getppid() (ppid int) |
| 623 | //sys Getpriority(which int, who int) (n int, err error) |
| 624 | //sysnb Getrlimit(which int, lim *Rlimit) (err error) |
| 625 | //sysnb Getrusage(who int, rusage *Rusage) (err error) |
| 626 | //sysnb Getsid(pid int) (sid int, err error) |
| 627 | //sysnb Gettimeofday(tv *Timeval) (err error) |
| 628 | //sysnb Getuid() (uid int) |
| 629 | //sys Kill(pid int, signum syscall.Signal) (err error) |
| 630 | //sys Lchown(path string, uid int, gid int) (err error) |
| 631 | //sys Link(path string, link string) (err error) |
| 632 | //sys Listen(s int, backlog int) (err error) = libsocket.__xnet_listen |
| 633 | //sys Lstat(path string, stat *Stat_t) (err error) |
| 634 | //sys Madvise(b []byte, advice int) (err error) |
| 635 | //sys Mkdir(path string, mode uint32) (err error) |
| 636 | //sys Mkdirat(dirfd int, path string, mode uint32) (err error) |
| 637 | //sys Mkfifo(path string, mode uint32) (err error) |
| 638 | //sys Mkfifoat(dirfd int, path string, mode uint32) (err error) |
| 639 | //sys Mknod(path string, mode uint32, dev int) (err error) |
| 640 | //sys Mknodat(dirfd int, path string, mode uint32, dev int) (err error) |
| 641 | //sys Mlock(b []byte) (err error) |
| 642 | //sys Mlockall(flags int) (err error) |
| 643 | //sys Mprotect(b []byte, prot int) (err error) |
| 644 | //sys Msync(b []byte, flags int) (err error) |
| 645 | //sys Munlock(b []byte) (err error) |
| 646 | //sys Munlockall() (err error) |
| 647 | //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) |
| 648 | //sys Open(path string, mode int, perm uint32) (fd int, err error) |
| 649 | //sys Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) |
| 650 | //sys Pathconf(path string, name int) (val int, err error) |
| 651 | //sys Pause() (err error) |
| 652 | //sys pread(fd int, p []byte, offset int64) (n int, err error) |
| 653 | //sys pwrite(fd int, p []byte, offset int64) (n int, err error) |
| 654 | //sys read(fd int, p []byte) (n int, err error) |
| 655 | //sys Readlink(path string, buf []byte) (n int, err error) |
| 656 | //sys Rename(from string, to string) (err error) |
| 657 | //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) |
| 658 | //sys Rmdir(path string) (err error) |
| 659 | //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = lseek |
| 660 | //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) |
| 661 | //sysnb Setegid(egid int) (err error) |
| 662 | //sysnb Seteuid(euid int) (err error) |
| 663 | //sysnb Setgid(gid int) (err error) |
| 664 | //sys Sethostname(p []byte) (err error) |
| 665 | //sysnb Setpgid(pid int, pgid int) (err error) |
| 666 | //sys Setpriority(which int, who int, prio int) (err error) |
| 667 | //sysnb Setregid(rgid int, egid int) (err error) |
| 668 | //sysnb Setreuid(ruid int, euid int) (err error) |
| 669 | //sysnb Setsid() (pid int, err error) |
| 670 | //sysnb Setuid(uid int) (err error) |
| 671 | //sys Shutdown(s int, how int) (err error) = libsocket.shutdown |
| 672 | //sys Stat(path string, stat *Stat_t) (err error) |
| 673 | //sys Statvfs(path string, vfsstat *Statvfs_t) (err error) |
| 674 | //sys Symlink(path string, link string) (err error) |
| 675 | //sys Sync() (err error) |
| 676 | //sys Sysconf(which int) (n int64, err error) |
| 677 | //sysnb Times(tms *Tms) (ticks uintptr, err error) |
| 678 | //sys Truncate(path string, length int64) (err error) |
| 679 | //sys Fsync(fd int) (err error) |
| 680 | //sys Ftruncate(fd int, length int64) (err error) |
| 681 | //sys Umask(mask int) (oldmask int) |
| 682 | //sysnb Uname(buf *Utsname) (err error) |
| 683 | //sys Unmount(target string, flags int) (err error) = libc.umount |
| 684 | //sys Unlink(path string) (err error) |
| 685 | //sys Unlinkat(dirfd int, path string, flags int) (err error) |
| 686 | //sys Ustat(dev int, ubuf *Ustat_t) (err error) |
| 687 | //sys Utime(path string, buf *Utimbuf) (err error) |
| 688 | //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = libsocket.__xnet_bind |
| 689 | //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = libsocket.__xnet_connect |
| 690 | //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) |
| 691 | //sys munmap(addr uintptr, length uintptr) (err error) |
| 692 | //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = libsendfile.sendfile |
| 693 | //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) = libsocket.__xnet_sendto |
| 694 | //sys socket(domain int, typ int, proto int) (fd int, err error) = libsocket.__xnet_socket |
| 695 | //sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) = libsocket.__xnet_socketpair |
| 696 | //sys write(fd int, p []byte) (n int, err error) |
| 697 | //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) = libsocket.__xnet_getsockopt |
| 698 | //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = libsocket.getpeername |
| 699 | //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) = libsocket.setsockopt |
| 700 | //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) = libsocket.recvfrom |
| 701 | |
| 702 | // Event Ports |
| 703 | |
| 704 | type fileObjCookie struct { |
| 705 | fobj *fileObj |
| 706 | cookie interface{} |
| 707 | } |
| 708 | |
| 709 | // EventPort provides a safe abstraction on top of Solaris/illumos Event Ports. |
| 710 | type EventPort struct { |
| 711 | port int |
| 712 | mu sync.Mutex |
| 713 | fds map[uintptr]*fileObjCookie |
| 714 | paths map[string]*fileObjCookie |
| 715 | // The user cookie presents an interesting challenge from a memory management perspective. |
| 716 | // There are two paths by which we can discover that it is no longer in use: |
| 717 | // 1. The user calls port_dissociate before any events fire |
| 718 | // 2. An event fires and we return it to the user |
| 719 | // The tricky situation is if the event has fired in the kernel but |
| 720 | // the user hasn't requested/received it yet. |
| 721 | // If the user wants to port_dissociate before the event has been processed, |
| 722 | // we should handle things gracefully. To do so, we need to keep an extra |
| 723 | // reference to the cookie around until the event is processed |
| 724 | // thus the otherwise seemingly extraneous "cookies" map |
| 725 | // The key of this map is a pointer to the corresponding fCookie |
| 726 | cookies map[*fileObjCookie]struct{} |
| 727 | } |
| 728 | |
| 729 | // PortEvent is an abstraction of the port_event C struct. |
| 730 | // Compare Source against PORT_SOURCE_FILE or PORT_SOURCE_FD |
| 731 | // to see if Path or Fd was the event source. The other will be |
| 732 | // uninitialized. |
| 733 | type PortEvent struct { |
| 734 | Cookie interface{} |
| 735 | Events int32 |
| 736 | Fd uintptr |
| 737 | Path string |
| 738 | Source uint16 |
| 739 | fobj *fileObj |
| 740 | } |
| 741 | |
| 742 | // NewEventPort creates a new EventPort including the |
| 743 | // underlying call to port_create(3c). |
| 744 | func NewEventPort() (*EventPort, error) { |
| 745 | port, err := port_create() |
| 746 | if err != nil { |
| 747 | return nil, err |
| 748 | } |
| 749 | e := &EventPort{ |
| 750 | port: port, |
| 751 | fds: make(map[uintptr]*fileObjCookie), |
| 752 | paths: make(map[string]*fileObjCookie), |
| 753 | cookies: make(map[*fileObjCookie]struct{}), |
| 754 | } |
| 755 | return e, nil |
| 756 | } |
| 757 | |
| 758 | //sys port_create() (n int, err error) |
| 759 | //sys port_associate(port int, source int, object uintptr, events int, user *byte) (n int, err error) |
| 760 | //sys port_dissociate(port int, source int, object uintptr) (n int, err error) |
| 761 | //sys port_get(port int, pe *portEvent, timeout *Timespec) (n int, err error) |
| 762 | //sys port_getn(port int, pe *portEvent, max uint32, nget *uint32, timeout *Timespec) (n int, err error) |
| 763 | |
| 764 | // Close closes the event port. |
| 765 | func (e *EventPort) Close() error { |
| 766 | e.mu.Lock() |
| 767 | defer e.mu.Unlock() |
| 768 | err := Close(e.port) |
| 769 | if err != nil { |
| 770 | return err |
| 771 | } |
| 772 | e.fds = nil |
| 773 | e.paths = nil |
| 774 | e.cookies = nil |
| 775 | return nil |
| 776 | } |
| 777 | |
| 778 | // PathIsWatched checks to see if path is associated with this EventPort. |
| 779 | func (e *EventPort) PathIsWatched(path string) bool { |
| 780 | e.mu.Lock() |
| 781 | defer e.mu.Unlock() |
| 782 | _, found := e.paths[path] |
| 783 | return found |
| 784 | } |
| 785 | |
| 786 | // FdIsWatched checks to see if fd is associated with this EventPort. |
| 787 | func (e *EventPort) FdIsWatched(fd uintptr) bool { |
| 788 | e.mu.Lock() |
| 789 | defer e.mu.Unlock() |
| 790 | _, found := e.fds[fd] |
| 791 | return found |
| 792 | } |
| 793 | |
| 794 | // AssociatePath wraps port_associate(3c) for a filesystem path including |
| 795 | // creating the necessary file_obj from the provided stat information. |
| 796 | func (e *EventPort) AssociatePath(path string, stat os.FileInfo, events int, cookie interface{}) error { |
| 797 | e.mu.Lock() |
| 798 | defer e.mu.Unlock() |
| 799 | if _, found := e.paths[path]; found { |
| 800 | return fmt.Errorf("%v is already associated with this Event Port", path) |
| 801 | } |
| 802 | fCookie, err := createFileObjCookie(path, stat, cookie) |
| 803 | if err != nil { |
| 804 | return err |
| 805 | } |
| 806 | _, err = port_associate(e.port, PORT_SOURCE_FILE, uintptr(unsafe.Pointer(fCookie.fobj)), events, (*byte)(unsafe.Pointer(fCookie))) |
| 807 | if err != nil { |
| 808 | return err |
| 809 | } |
| 810 | e.paths[path] = fCookie |
| 811 | e.cookies[fCookie] = struct{}{} |
| 812 | return nil |
| 813 | } |
| 814 | |
| 815 | // DissociatePath wraps port_dissociate(3c) for a filesystem path. |
| 816 | func (e *EventPort) DissociatePath(path string) error { |
| 817 | e.mu.Lock() |
| 818 | defer e.mu.Unlock() |
| 819 | f, ok := e.paths[path] |
| 820 | if !ok { |
| 821 | return fmt.Errorf("%v is not associated with this Event Port", path) |
| 822 | } |
| 823 | _, err := port_dissociate(e.port, PORT_SOURCE_FILE, uintptr(unsafe.Pointer(f.fobj))) |
| 824 | // If the path is no longer associated with this event port (ENOENT) |
| 825 | // we should delete it from our map. We can still return ENOENT to the caller. |
| 826 | // But we need to save the cookie |
| 827 | if err != nil && err != ENOENT { |
| 828 | return err |
| 829 | } |
| 830 | if err == nil { |
| 831 | // dissociate was successful, safe to delete the cookie |
| 832 | fCookie := e.paths[path] |
| 833 | delete(e.cookies, fCookie) |
| 834 | } |
| 835 | delete(e.paths, path) |
| 836 | return err |
| 837 | } |
| 838 | |
| 839 | // AssociateFd wraps calls to port_associate(3c) on file descriptors. |
| 840 | func (e *EventPort) AssociateFd(fd uintptr, events int, cookie interface{}) error { |
| 841 | e.mu.Lock() |
| 842 | defer e.mu.Unlock() |
| 843 | if _, found := e.fds[fd]; found { |
| 844 | return fmt.Errorf("%v is already associated with this Event Port", fd) |
| 845 | } |
| 846 | fCookie, err := createFileObjCookie("", nil, cookie) |
| 847 | if err != nil { |
| 848 | return err |
| 849 | } |
| 850 | _, err = port_associate(e.port, PORT_SOURCE_FD, fd, events, (*byte)(unsafe.Pointer(fCookie))) |
| 851 | if err != nil { |
| 852 | return err |
| 853 | } |
| 854 | e.fds[fd] = fCookie |
| 855 | e.cookies[fCookie] = struct{}{} |
| 856 | return nil |
| 857 | } |
| 858 | |
| 859 | // DissociateFd wraps calls to port_dissociate(3c) on file descriptors. |
| 860 | func (e *EventPort) DissociateFd(fd uintptr) error { |
| 861 | e.mu.Lock() |
| 862 | defer e.mu.Unlock() |
| 863 | _, ok := e.fds[fd] |
| 864 | if !ok { |
| 865 | return fmt.Errorf("%v is not associated with this Event Port", fd) |
| 866 | } |
| 867 | _, err := port_dissociate(e.port, PORT_SOURCE_FD, fd) |
| 868 | if err != nil && err != ENOENT { |
| 869 | return err |
| 870 | } |
| 871 | if err == nil { |
| 872 | // dissociate was successful, safe to delete the cookie |
| 873 | fCookie := e.fds[fd] |
| 874 | delete(e.cookies, fCookie) |
| 875 | } |
| 876 | delete(e.fds, fd) |
| 877 | return err |
| 878 | } |
| 879 | |
| 880 | func createFileObjCookie(name string, stat os.FileInfo, cookie interface{}) (*fileObjCookie, error) { |
| 881 | fCookie := new(fileObjCookie) |
| 882 | fCookie.cookie = cookie |
| 883 | if name != "" && stat != nil { |
| 884 | fCookie.fobj = new(fileObj) |
| 885 | bs, err := ByteSliceFromString(name) |
| 886 | if err != nil { |
| 887 | return nil, err |
| 888 | } |
| 889 | fCookie.fobj.Name = (*int8)(unsafe.Pointer(&bs[0])) |
| 890 | s := stat.Sys().(*syscall.Stat_t) |
| 891 | fCookie.fobj.Atim.Sec = s.Atim.Sec |
| 892 | fCookie.fobj.Atim.Nsec = s.Atim.Nsec |
| 893 | fCookie.fobj.Mtim.Sec = s.Mtim.Sec |
| 894 | fCookie.fobj.Mtim.Nsec = s.Mtim.Nsec |
| 895 | fCookie.fobj.Ctim.Sec = s.Ctim.Sec |
| 896 | fCookie.fobj.Ctim.Nsec = s.Ctim.Nsec |
| 897 | } |
| 898 | return fCookie, nil |
| 899 | } |
| 900 | |
| 901 | // GetOne wraps port_get(3c) and returns a single PortEvent. |
| 902 | func (e *EventPort) GetOne(t *Timespec) (*PortEvent, error) { |
| 903 | pe := new(portEvent) |
| 904 | _, err := port_get(e.port, pe, t) |
| 905 | if err != nil { |
| 906 | return nil, err |
| 907 | } |
| 908 | p := new(PortEvent) |
| 909 | e.mu.Lock() |
| 910 | defer e.mu.Unlock() |
| 911 | err = e.peIntToExt(pe, p) |
| 912 | if err != nil { |
| 913 | return nil, err |
| 914 | } |
| 915 | return p, nil |
| 916 | } |
| 917 | |
| 918 | // peIntToExt converts a cgo portEvent struct into the friendlier PortEvent |
| 919 | // NOTE: Always call this function while holding the e.mu mutex |
| 920 | func (e *EventPort) peIntToExt(peInt *portEvent, peExt *PortEvent) error { |
| 921 | if e.cookies == nil { |
| 922 | return fmt.Errorf("this EventPort is already closed") |
| 923 | } |
| 924 | peExt.Events = peInt.Events |
| 925 | peExt.Source = peInt.Source |
| 926 | fCookie := (*fileObjCookie)(unsafe.Pointer(peInt.User)) |
| 927 | _, found := e.cookies[fCookie] |
| 928 | |
| 929 | if !found { |
| 930 | panic("unexpected event port address; may be due to kernel bug; see https://go.dev/issue/54254") |
| 931 | } |
| 932 | peExt.Cookie = fCookie.cookie |
| 933 | delete(e.cookies, fCookie) |
| 934 | |
| 935 | switch peInt.Source { |
| 936 | case PORT_SOURCE_FD: |
| 937 | peExt.Fd = uintptr(peInt.Object) |
| 938 | // Only remove the fds entry if it exists and this cookie matches |
| 939 | if fobj, ok := e.fds[peExt.Fd]; ok { |
| 940 | if fobj == fCookie { |
| 941 | delete(e.fds, peExt.Fd) |
| 942 | } |
| 943 | } |
| 944 | case PORT_SOURCE_FILE: |
| 945 | peExt.fobj = fCookie.fobj |
| 946 | peExt.Path = BytePtrToString((*byte)(unsafe.Pointer(peExt.fobj.Name))) |
| 947 | // Only remove the paths entry if it exists and this cookie matches |
| 948 | if fobj, ok := e.paths[peExt.Path]; ok { |
| 949 | if fobj == fCookie { |
| 950 | delete(e.paths, peExt.Path) |
| 951 | } |
| 952 | } |
| 953 | } |
| 954 | return nil |
| 955 | } |
| 956 | |
| 957 | // Pending wraps port_getn(3c) and returns how many events are pending. |
| 958 | func (e *EventPort) Pending() (int, error) { |
| 959 | var n uint32 = 0 |
| 960 | _, err := port_getn(e.port, nil, 0, &n, nil) |
| 961 | return int(n), err |
| 962 | } |
| 963 | |
| 964 | // Get wraps port_getn(3c) and fills a slice of PortEvent. |
| 965 | // It will block until either min events have been received |
| 966 | // or the timeout has been exceeded. It will return how many |
| 967 | // events were actually received along with any error information. |
| 968 | func (e *EventPort) Get(s []PortEvent, min int, timeout *Timespec) (int, error) { |
| 969 | if min == 0 { |
| 970 | return 0, fmt.Errorf("need to request at least one event or use Pending() instead") |
| 971 | } |
| 972 | if len(s) < min { |
| 973 | return 0, fmt.Errorf("len(s) (%d) is less than min events requested (%d)", len(s), min) |
| 974 | } |
| 975 | got := uint32(min) |
| 976 | max := uint32(len(s)) |
| 977 | var err error |
| 978 | ps := make([]portEvent, max) |
| 979 | _, err = port_getn(e.port, &ps[0], max, &got, timeout) |
| 980 | // got will be trustworthy with ETIME, but not any other error. |
| 981 | if err != nil && err != ETIME { |
| 982 | return 0, err |
| 983 | } |
| 984 | e.mu.Lock() |
| 985 | defer e.mu.Unlock() |
| 986 | valid := 0 |
| 987 | for i := 0; i < int(got); i++ { |
| 988 | err2 := e.peIntToExt(&ps[i], &s[i]) |
| 989 | if err2 != nil { |
| 990 | if valid == 0 && err == nil { |
| 991 | // If err2 is the only error and there are no valid events |
| 992 | // to return, return it to the caller. |
| 993 | err = err2 |
| 994 | } |
| 995 | break |
| 996 | } |
| 997 | valid = i + 1 |
| 998 | } |
| 999 | return valid, err |
| 1000 | } |
| 1001 | |
| 1002 | //sys putmsg(fd int, clptr *strbuf, dataptr *strbuf, flags int) (err error) |
| 1003 | |
| 1004 | func Putmsg(fd int, cl []byte, data []byte, flags int) (err error) { |
| 1005 | var clp, datap *strbuf |
| 1006 | if len(cl) > 0 { |
| 1007 | clp = &strbuf{ |
| 1008 | Len: int32(len(cl)), |
| 1009 | Buf: (*int8)(unsafe.Pointer(&cl[0])), |
| 1010 | } |
| 1011 | } |
| 1012 | if len(data) > 0 { |
| 1013 | datap = &strbuf{ |
| 1014 | Len: int32(len(data)), |
| 1015 | Buf: (*int8)(unsafe.Pointer(&data[0])), |
| 1016 | } |
| 1017 | } |
| 1018 | return putmsg(fd, clp, datap, flags) |
| 1019 | } |
| 1020 | |
| 1021 | //sys getmsg(fd int, clptr *strbuf, dataptr *strbuf, flags *int) (err error) |
| 1022 | |
| 1023 | func Getmsg(fd int, cl []byte, data []byte) (retCl []byte, retData []byte, flags int, err error) { |
| 1024 | var clp, datap *strbuf |
| 1025 | if len(cl) > 0 { |
| 1026 | clp = &strbuf{ |
| 1027 | Maxlen: int32(len(cl)), |
| 1028 | Buf: (*int8)(unsafe.Pointer(&cl[0])), |
| 1029 | } |
| 1030 | } |
| 1031 | if len(data) > 0 { |
| 1032 | datap = &strbuf{ |
| 1033 | Maxlen: int32(len(data)), |
| 1034 | Buf: (*int8)(unsafe.Pointer(&data[0])), |
| 1035 | } |
| 1036 | } |
| 1037 | |
| 1038 | if err = getmsg(fd, clp, datap, &flags); err != nil { |
| 1039 | return nil, nil, 0, err |
| 1040 | } |
| 1041 | |
| 1042 | if len(cl) > 0 { |
| 1043 | retCl = cl[:clp.Len] |
| 1044 | } |
| 1045 | if len(data) > 0 { |
| 1046 | retData = data[:datap.Len] |
| 1047 | } |
| 1048 | return retCl, retData, flags, nil |
| 1049 | } |
| 1050 | |
| 1051 | func IoctlSetIntRetInt(fd int, req int, arg int) (int, error) { |
| 1052 | return ioctlRet(fd, req, uintptr(arg)) |
| 1053 | } |
| 1054 | |
| 1055 | // Lifreq Helpers |
| 1056 | |
| 1057 | func (l *Lifreq) SetName(name string) error { |
| 1058 | if len(name) >= len(l.Name) { |
| 1059 | return fmt.Errorf("name cannot be more than %d characters", len(l.Name)-1) |
| 1060 | } |
| 1061 | for i := range name { |
| 1062 | l.Name[i] = int8(name[i]) |
| 1063 | } |
| 1064 | return nil |
| 1065 | } |
| 1066 | |
| 1067 | func (l *Lifreq) SetLifruInt(d int) { |
| 1068 | *(*int)(unsafe.Pointer(&l.Lifru[0])) = d |
| 1069 | } |
| 1070 | |
| 1071 | func (l *Lifreq) GetLifruInt() int { |
| 1072 | return *(*int)(unsafe.Pointer(&l.Lifru[0])) |
| 1073 | } |
| 1074 | |
| 1075 | func (l *Lifreq) SetLifruUint(d uint) { |
| 1076 | *(*uint)(unsafe.Pointer(&l.Lifru[0])) = d |
| 1077 | } |
| 1078 | |
| 1079 | func (l *Lifreq) GetLifruUint() uint { |
| 1080 | return *(*uint)(unsafe.Pointer(&l.Lifru[0])) |
| 1081 | } |
| 1082 | |
| 1083 | func IoctlLifreq(fd int, req int, l *Lifreq) error { |
| 1084 | return ioctlPtr(fd, req, unsafe.Pointer(l)) |
| 1085 | } |
| 1086 | |
| 1087 | // Strioctl Helpers |
| 1088 | |
| 1089 | func (s *Strioctl) SetInt(i int) { |
| 1090 | s.Len = int32(unsafe.Sizeof(i)) |
| 1091 | s.Dp = (*int8)(unsafe.Pointer(&i)) |
| 1092 | } |
| 1093 | |
| 1094 | func IoctlSetStrioctlRetInt(fd int, req int, s *Strioctl) (int, error) { |
| 1095 | return ioctlPtrRet(fd, req, unsafe.Pointer(s)) |
| 1096 | } |
| 1097 | |
| 1098 | // Ucred Helpers |
| 1099 | // See ucred(3c) and getpeerucred(3c) |
| 1100 | |
| 1101 | //sys getpeerucred(fd uintptr, ucred *uintptr) (err error) |
| 1102 | //sys ucredFree(ucred uintptr) = ucred_free |
| 1103 | //sys ucredGet(pid int) (ucred uintptr, err error) = ucred_get |
| 1104 | //sys ucredGeteuid(ucred uintptr) (uid int) = ucred_geteuid |
| 1105 | //sys ucredGetegid(ucred uintptr) (gid int) = ucred_getegid |
| 1106 | //sys ucredGetruid(ucred uintptr) (uid int) = ucred_getruid |
| 1107 | //sys ucredGetrgid(ucred uintptr) (gid int) = ucred_getrgid |
| 1108 | //sys ucredGetsuid(ucred uintptr) (uid int) = ucred_getsuid |
| 1109 | //sys ucredGetsgid(ucred uintptr) (gid int) = ucred_getsgid |
| 1110 | //sys ucredGetpid(ucred uintptr) (pid int) = ucred_getpid |
| 1111 | |
| 1112 | // Ucred is an opaque struct that holds user credentials. |
| 1113 | type Ucred struct { |
| 1114 | ucred uintptr |
| 1115 | } |
| 1116 | |
| 1117 | // We need to ensure that ucredFree is called on the underlying ucred |
| 1118 | // when the Ucred is garbage collected. |
| 1119 | func ucredFinalizer(u *Ucred) { |
| 1120 | ucredFree(u.ucred) |
| 1121 | } |
| 1122 | |
| 1123 | func GetPeerUcred(fd uintptr) (*Ucred, error) { |
| 1124 | var ucred uintptr |
| 1125 | err := getpeerucred(fd, &ucred) |
| 1126 | if err != nil { |
| 1127 | return nil, err |
| 1128 | } |
| 1129 | result := &Ucred{ |
| 1130 | ucred: ucred, |
| 1131 | } |
| 1132 | // set the finalizer on the result so that the ucred will be freed |
| 1133 | runtime.SetFinalizer(result, ucredFinalizer) |
| 1134 | return result, nil |
| 1135 | } |
| 1136 | |
| 1137 | func UcredGet(pid int) (*Ucred, error) { |
| 1138 | ucred, err := ucredGet(pid) |
| 1139 | if err != nil { |
| 1140 | return nil, err |
| 1141 | } |
| 1142 | result := &Ucred{ |
| 1143 | ucred: ucred, |
| 1144 | } |
| 1145 | // set the finalizer on the result so that the ucred will be freed |
| 1146 | runtime.SetFinalizer(result, ucredFinalizer) |
| 1147 | return result, nil |
| 1148 | } |
| 1149 | |
| 1150 | func (u *Ucred) Geteuid() int { |
| 1151 | defer runtime.KeepAlive(u) |
| 1152 | return ucredGeteuid(u.ucred) |
| 1153 | } |
| 1154 | |
| 1155 | func (u *Ucred) Getruid() int { |
| 1156 | defer runtime.KeepAlive(u) |
| 1157 | return ucredGetruid(u.ucred) |
| 1158 | } |
| 1159 | |
| 1160 | func (u *Ucred) Getsuid() int { |
| 1161 | defer runtime.KeepAlive(u) |
| 1162 | return ucredGetsuid(u.ucred) |
| 1163 | } |
| 1164 | |
| 1165 | func (u *Ucred) Getegid() int { |
| 1166 | defer runtime.KeepAlive(u) |
| 1167 | return ucredGetegid(u.ucred) |
| 1168 | } |
| 1169 | |
| 1170 | func (u *Ucred) Getrgid() int { |
| 1171 | defer runtime.KeepAlive(u) |
| 1172 | return ucredGetrgid(u.ucred) |
| 1173 | } |
| 1174 | |
| 1175 | func (u *Ucred) Getsgid() int { |
| 1176 | defer runtime.KeepAlive(u) |
| 1177 | return ucredGetsgid(u.ucred) |
| 1178 | } |
| 1179 | |
| 1180 | func (u *Ucred) Getpid() int { |
| 1181 | defer runtime.KeepAlive(u) |
| 1182 | return ucredGetpid(u.ucred) |
| 1183 | } |