William Kurkian | 6ea97f8 | 2019-03-13 15:51:55 -0400 | [diff] [blame] | 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 | // +build darwin dragonfly freebsd netbsd openbsd |
| 6 | |
| 7 | // BSD system call wrappers shared by *BSD based systems |
| 8 | // including OS X (Darwin) and FreeBSD. Like the other |
| 9 | // syscall_*.go files it is compiled as Go code but also |
| 10 | // used as input to mksyscall which parses the //sys |
| 11 | // lines and generates system call stubs. |
| 12 | |
| 13 | package unix |
| 14 | |
| 15 | import ( |
| 16 | "runtime" |
| 17 | "syscall" |
| 18 | "unsafe" |
| 19 | ) |
| 20 | |
| 21 | /* |
| 22 | * Wrapped |
| 23 | */ |
| 24 | |
| 25 | //sysnb getgroups(ngid int, gid *_Gid_t) (n int, err error) |
| 26 | //sysnb setgroups(ngid int, gid *_Gid_t) (err error) |
| 27 | |
| 28 | func Getgroups() (gids []int, err error) { |
| 29 | n, err := getgroups(0, nil) |
| 30 | if err != nil { |
| 31 | return nil, err |
| 32 | } |
| 33 | if n == 0 { |
| 34 | return nil, nil |
| 35 | } |
| 36 | |
| 37 | // Sanity check group count. Max is 16 on BSD. |
| 38 | if n < 0 || n > 1000 { |
| 39 | return nil, EINVAL |
| 40 | } |
| 41 | |
| 42 | a := make([]_Gid_t, n) |
| 43 | n, err = getgroups(n, &a[0]) |
| 44 | if err != nil { |
| 45 | return nil, err |
| 46 | } |
| 47 | gids = make([]int, n) |
| 48 | for i, v := range a[0:n] { |
| 49 | gids[i] = int(v) |
| 50 | } |
| 51 | return |
| 52 | } |
| 53 | |
| 54 | func Setgroups(gids []int) (err error) { |
| 55 | if len(gids) == 0 { |
| 56 | return setgroups(0, nil) |
| 57 | } |
| 58 | |
| 59 | a := make([]_Gid_t, len(gids)) |
| 60 | for i, v := range gids { |
| 61 | a[i] = _Gid_t(v) |
| 62 | } |
| 63 | return setgroups(len(a), &a[0]) |
| 64 | } |
| 65 | |
| 66 | func ReadDirent(fd int, buf []byte) (n int, err error) { |
| 67 | // Final argument is (basep *uintptr) and the syscall doesn't take nil. |
| 68 | // 64 bits should be enough. (32 bits isn't even on 386). Since the |
| 69 | // actual system call is getdirentries64, 64 is a good guess. |
| 70 | // TODO(rsc): Can we use a single global basep for all calls? |
| 71 | var base = (*uintptr)(unsafe.Pointer(new(uint64))) |
| 72 | return Getdirentries(fd, buf, base) |
| 73 | } |
| 74 | |
| 75 | // Wait status is 7 bits at bottom, either 0 (exited), |
| 76 | // 0x7F (stopped), or a signal number that caused an exit. |
| 77 | // The 0x80 bit is whether there was a core dump. |
| 78 | // An extra number (exit code, signal causing a stop) |
| 79 | // is in the high bits. |
| 80 | |
| 81 | type WaitStatus uint32 |
| 82 | |
| 83 | const ( |
| 84 | mask = 0x7F |
| 85 | core = 0x80 |
| 86 | shift = 8 |
| 87 | |
| 88 | exited = 0 |
| 89 | stopped = 0x7F |
| 90 | ) |
| 91 | |
| 92 | func (w WaitStatus) Exited() bool { return w&mask == exited } |
| 93 | |
| 94 | func (w WaitStatus) ExitStatus() int { |
| 95 | if w&mask != exited { |
| 96 | return -1 |
| 97 | } |
| 98 | return int(w >> shift) |
| 99 | } |
| 100 | |
| 101 | func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != 0 } |
| 102 | |
| 103 | func (w WaitStatus) Signal() syscall.Signal { |
| 104 | sig := syscall.Signal(w & mask) |
| 105 | if sig == stopped || sig == 0 { |
| 106 | return -1 |
| 107 | } |
| 108 | return sig |
| 109 | } |
| 110 | |
| 111 | func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 } |
| 112 | |
| 113 | func (w WaitStatus) Stopped() bool { return w&mask == stopped && syscall.Signal(w>>shift) != SIGSTOP } |
| 114 | |
| 115 | func (w WaitStatus) Continued() bool { return w&mask == stopped && syscall.Signal(w>>shift) == SIGSTOP } |
| 116 | |
| 117 | func (w WaitStatus) StopSignal() syscall.Signal { |
| 118 | if !w.Stopped() { |
| 119 | return -1 |
| 120 | } |
| 121 | return syscall.Signal(w>>shift) & 0xFF |
| 122 | } |
| 123 | |
| 124 | func (w WaitStatus) TrapCause() int { return -1 } |
| 125 | |
| 126 | //sys wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) |
| 127 | |
| 128 | func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) { |
| 129 | var status _C_int |
| 130 | wpid, err = wait4(pid, &status, options, rusage) |
| 131 | if wstatus != nil { |
| 132 | *wstatus = WaitStatus(status) |
| 133 | } |
| 134 | return |
| 135 | } |
| 136 | |
| 137 | //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) |
| 138 | //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) |
| 139 | //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) |
| 140 | //sysnb socket(domain int, typ int, proto int) (fd int, err error) |
| 141 | //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) |
| 142 | //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) |
| 143 | //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) |
| 144 | //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) |
| 145 | //sys Shutdown(s int, how int) (err error) |
| 146 | |
| 147 | func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 148 | if sa.Port < 0 || sa.Port > 0xFFFF { |
| 149 | return nil, 0, EINVAL |
| 150 | } |
| 151 | sa.raw.Len = SizeofSockaddrInet4 |
| 152 | sa.raw.Family = AF_INET |
| 153 | p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) |
| 154 | p[0] = byte(sa.Port >> 8) |
| 155 | p[1] = byte(sa.Port) |
| 156 | for i := 0; i < len(sa.Addr); i++ { |
| 157 | sa.raw.Addr[i] = sa.Addr[i] |
| 158 | } |
| 159 | return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil |
| 160 | } |
| 161 | |
| 162 | func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 163 | if sa.Port < 0 || sa.Port > 0xFFFF { |
| 164 | return nil, 0, EINVAL |
| 165 | } |
| 166 | sa.raw.Len = SizeofSockaddrInet6 |
| 167 | sa.raw.Family = AF_INET6 |
| 168 | p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) |
| 169 | p[0] = byte(sa.Port >> 8) |
| 170 | p[1] = byte(sa.Port) |
| 171 | sa.raw.Scope_id = sa.ZoneId |
| 172 | for i := 0; i < len(sa.Addr); i++ { |
| 173 | sa.raw.Addr[i] = sa.Addr[i] |
| 174 | } |
| 175 | return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil |
| 176 | } |
| 177 | |
| 178 | func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 179 | name := sa.Name |
| 180 | n := len(name) |
| 181 | if n >= len(sa.raw.Path) || n == 0 { |
| 182 | return nil, 0, EINVAL |
| 183 | } |
| 184 | sa.raw.Len = byte(3 + n) // 2 for Family, Len; 1 for NUL |
| 185 | sa.raw.Family = AF_UNIX |
| 186 | for i := 0; i < n; i++ { |
| 187 | sa.raw.Path[i] = int8(name[i]) |
| 188 | } |
| 189 | return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil |
| 190 | } |
| 191 | |
| 192 | func (sa *SockaddrDatalink) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 193 | if sa.Index == 0 { |
| 194 | return nil, 0, EINVAL |
| 195 | } |
| 196 | sa.raw.Len = sa.Len |
| 197 | sa.raw.Family = AF_LINK |
| 198 | sa.raw.Index = sa.Index |
| 199 | sa.raw.Type = sa.Type |
| 200 | sa.raw.Nlen = sa.Nlen |
| 201 | sa.raw.Alen = sa.Alen |
| 202 | sa.raw.Slen = sa.Slen |
| 203 | for i := 0; i < len(sa.raw.Data); i++ { |
| 204 | sa.raw.Data[i] = sa.Data[i] |
| 205 | } |
| 206 | return unsafe.Pointer(&sa.raw), SizeofSockaddrDatalink, nil |
| 207 | } |
| 208 | |
| 209 | func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { |
| 210 | switch rsa.Addr.Family { |
| 211 | case AF_LINK: |
| 212 | pp := (*RawSockaddrDatalink)(unsafe.Pointer(rsa)) |
| 213 | sa := new(SockaddrDatalink) |
| 214 | sa.Len = pp.Len |
| 215 | sa.Family = pp.Family |
| 216 | sa.Index = pp.Index |
| 217 | sa.Type = pp.Type |
| 218 | sa.Nlen = pp.Nlen |
| 219 | sa.Alen = pp.Alen |
| 220 | sa.Slen = pp.Slen |
| 221 | for i := 0; i < len(sa.Data); i++ { |
| 222 | sa.Data[i] = pp.Data[i] |
| 223 | } |
| 224 | return sa, nil |
| 225 | |
| 226 | case AF_UNIX: |
| 227 | pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) |
| 228 | if pp.Len < 2 || pp.Len > SizeofSockaddrUnix { |
| 229 | return nil, EINVAL |
| 230 | } |
| 231 | sa := new(SockaddrUnix) |
| 232 | |
| 233 | // Some BSDs include the trailing NUL in the length, whereas |
| 234 | // others do not. Work around this by subtracting the leading |
| 235 | // family and len. The path is then scanned to see if a NUL |
| 236 | // terminator still exists within the length. |
| 237 | n := int(pp.Len) - 2 // subtract leading Family, Len |
| 238 | for i := 0; i < n; i++ { |
| 239 | if pp.Path[i] == 0 { |
| 240 | // found early NUL; assume Len included the NUL |
| 241 | // or was overestimating. |
| 242 | n = i |
| 243 | break |
| 244 | } |
| 245 | } |
| 246 | bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n] |
| 247 | sa.Name = string(bytes) |
| 248 | return sa, nil |
| 249 | |
| 250 | case AF_INET: |
| 251 | pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) |
| 252 | sa := new(SockaddrInet4) |
| 253 | p := (*[2]byte)(unsafe.Pointer(&pp.Port)) |
| 254 | sa.Port = int(p[0])<<8 + int(p[1]) |
| 255 | for i := 0; i < len(sa.Addr); i++ { |
| 256 | sa.Addr[i] = pp.Addr[i] |
| 257 | } |
| 258 | return sa, nil |
| 259 | |
| 260 | case AF_INET6: |
| 261 | pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) |
| 262 | sa := new(SockaddrInet6) |
| 263 | p := (*[2]byte)(unsafe.Pointer(&pp.Port)) |
| 264 | sa.Port = int(p[0])<<8 + int(p[1]) |
| 265 | sa.ZoneId = pp.Scope_id |
| 266 | for i := 0; i < len(sa.Addr); i++ { |
| 267 | sa.Addr[i] = pp.Addr[i] |
| 268 | } |
| 269 | return sa, nil |
| 270 | } |
| 271 | return nil, EAFNOSUPPORT |
| 272 | } |
| 273 | |
| 274 | func Accept(fd int) (nfd int, sa Sockaddr, err error) { |
| 275 | var rsa RawSockaddrAny |
| 276 | var len _Socklen = SizeofSockaddrAny |
| 277 | nfd, err = accept(fd, &rsa, &len) |
| 278 | if err != nil { |
| 279 | return |
| 280 | } |
| 281 | if runtime.GOOS == "darwin" && len == 0 { |
| 282 | // Accepted socket has no address. |
| 283 | // This is likely due to a bug in xnu kernels, |
| 284 | // where instead of ECONNABORTED error socket |
| 285 | // is accepted, but has no address. |
| 286 | Close(nfd) |
| 287 | return 0, nil, ECONNABORTED |
| 288 | } |
| 289 | sa, err = anyToSockaddr(fd, &rsa) |
| 290 | if err != nil { |
| 291 | Close(nfd) |
| 292 | nfd = 0 |
| 293 | } |
| 294 | return |
| 295 | } |
| 296 | |
| 297 | func Getsockname(fd int) (sa Sockaddr, err error) { |
| 298 | var rsa RawSockaddrAny |
| 299 | var len _Socklen = SizeofSockaddrAny |
| 300 | if err = getsockname(fd, &rsa, &len); err != nil { |
| 301 | return |
| 302 | } |
| 303 | // TODO(jsing): DragonFly has a "bug" (see issue 3349), which should be |
| 304 | // reported upstream. |
| 305 | if runtime.GOOS == "dragonfly" && rsa.Addr.Family == AF_UNSPEC && rsa.Addr.Len == 0 { |
| 306 | rsa.Addr.Family = AF_UNIX |
| 307 | rsa.Addr.Len = SizeofSockaddrUnix |
| 308 | } |
| 309 | return anyToSockaddr(fd, &rsa) |
| 310 | } |
| 311 | |
| 312 | //sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) |
| 313 | |
| 314 | // GetsockoptString returns the string value of the socket option opt for the |
| 315 | // socket associated with fd at the given socket level. |
| 316 | func GetsockoptString(fd, level, opt int) (string, error) { |
| 317 | buf := make([]byte, 256) |
| 318 | vallen := _Socklen(len(buf)) |
| 319 | err := getsockopt(fd, level, opt, unsafe.Pointer(&buf[0]), &vallen) |
| 320 | if err != nil { |
| 321 | return "", err |
| 322 | } |
| 323 | return string(buf[:vallen-1]), nil |
| 324 | } |
| 325 | |
| 326 | //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) |
| 327 | //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) |
| 328 | //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) |
| 329 | |
| 330 | func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { |
| 331 | var msg Msghdr |
| 332 | var rsa RawSockaddrAny |
| 333 | msg.Name = (*byte)(unsafe.Pointer(&rsa)) |
| 334 | msg.Namelen = uint32(SizeofSockaddrAny) |
| 335 | var iov Iovec |
| 336 | if len(p) > 0 { |
| 337 | iov.Base = (*byte)(unsafe.Pointer(&p[0])) |
| 338 | iov.SetLen(len(p)) |
| 339 | } |
| 340 | var dummy byte |
| 341 | if len(oob) > 0 { |
| 342 | // receive at least one normal byte |
| 343 | if len(p) == 0 { |
| 344 | iov.Base = &dummy |
| 345 | iov.SetLen(1) |
| 346 | } |
| 347 | msg.Control = (*byte)(unsafe.Pointer(&oob[0])) |
| 348 | msg.SetControllen(len(oob)) |
| 349 | } |
| 350 | msg.Iov = &iov |
| 351 | msg.Iovlen = 1 |
| 352 | if n, err = recvmsg(fd, &msg, flags); err != nil { |
| 353 | return |
| 354 | } |
| 355 | oobn = int(msg.Controllen) |
| 356 | recvflags = int(msg.Flags) |
| 357 | // source address is only specified if the socket is unconnected |
| 358 | if rsa.Addr.Family != AF_UNSPEC { |
| 359 | from, err = anyToSockaddr(fd, &rsa) |
| 360 | } |
| 361 | return |
| 362 | } |
| 363 | |
| 364 | //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) |
| 365 | |
| 366 | func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { |
| 367 | _, err = SendmsgN(fd, p, oob, to, flags) |
| 368 | return |
| 369 | } |
| 370 | |
| 371 | func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { |
| 372 | var ptr unsafe.Pointer |
| 373 | var salen _Socklen |
| 374 | if to != nil { |
| 375 | ptr, salen, err = to.sockaddr() |
| 376 | if err != nil { |
| 377 | return 0, err |
| 378 | } |
| 379 | } |
| 380 | var msg Msghdr |
| 381 | msg.Name = (*byte)(unsafe.Pointer(ptr)) |
| 382 | msg.Namelen = uint32(salen) |
| 383 | var iov Iovec |
| 384 | if len(p) > 0 { |
| 385 | iov.Base = (*byte)(unsafe.Pointer(&p[0])) |
| 386 | iov.SetLen(len(p)) |
| 387 | } |
| 388 | var dummy byte |
| 389 | if len(oob) > 0 { |
| 390 | // send at least one normal byte |
| 391 | if len(p) == 0 { |
| 392 | iov.Base = &dummy |
| 393 | iov.SetLen(1) |
| 394 | } |
| 395 | msg.Control = (*byte)(unsafe.Pointer(&oob[0])) |
| 396 | msg.SetControllen(len(oob)) |
| 397 | } |
| 398 | msg.Iov = &iov |
| 399 | msg.Iovlen = 1 |
| 400 | if n, err = sendmsg(fd, &msg, flags); err != nil { |
| 401 | return 0, err |
| 402 | } |
| 403 | if len(oob) > 0 && len(p) == 0 { |
| 404 | n = 0 |
| 405 | } |
| 406 | return n, nil |
| 407 | } |
| 408 | |
| 409 | //sys kevent(kq int, change unsafe.Pointer, nchange int, event unsafe.Pointer, nevent int, timeout *Timespec) (n int, err error) |
| 410 | |
| 411 | func Kevent(kq int, changes, events []Kevent_t, timeout *Timespec) (n int, err error) { |
| 412 | var change, event unsafe.Pointer |
| 413 | if len(changes) > 0 { |
| 414 | change = unsafe.Pointer(&changes[0]) |
| 415 | } |
| 416 | if len(events) > 0 { |
| 417 | event = unsafe.Pointer(&events[0]) |
| 418 | } |
| 419 | return kevent(kq, change, len(changes), event, len(events), timeout) |
| 420 | } |
| 421 | |
| 422 | //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL |
| 423 | |
| 424 | // sysctlmib translates name to mib number and appends any additional args. |
| 425 | func sysctlmib(name string, args ...int) ([]_C_int, error) { |
| 426 | // Translate name to mib number. |
| 427 | mib, err := nametomib(name) |
| 428 | if err != nil { |
| 429 | return nil, err |
| 430 | } |
| 431 | |
| 432 | for _, a := range args { |
| 433 | mib = append(mib, _C_int(a)) |
| 434 | } |
| 435 | |
| 436 | return mib, nil |
| 437 | } |
| 438 | |
| 439 | func Sysctl(name string) (string, error) { |
| 440 | return SysctlArgs(name) |
| 441 | } |
| 442 | |
| 443 | func SysctlArgs(name string, args ...int) (string, error) { |
| 444 | buf, err := SysctlRaw(name, args...) |
| 445 | if err != nil { |
| 446 | return "", err |
| 447 | } |
| 448 | n := len(buf) |
| 449 | |
| 450 | // Throw away terminating NUL. |
| 451 | if n > 0 && buf[n-1] == '\x00' { |
| 452 | n-- |
| 453 | } |
| 454 | return string(buf[0:n]), nil |
| 455 | } |
| 456 | |
| 457 | func SysctlUint32(name string) (uint32, error) { |
| 458 | return SysctlUint32Args(name) |
| 459 | } |
| 460 | |
| 461 | func SysctlUint32Args(name string, args ...int) (uint32, error) { |
| 462 | mib, err := sysctlmib(name, args...) |
| 463 | if err != nil { |
| 464 | return 0, err |
| 465 | } |
| 466 | |
| 467 | n := uintptr(4) |
| 468 | buf := make([]byte, 4) |
| 469 | if err := sysctl(mib, &buf[0], &n, nil, 0); err != nil { |
| 470 | return 0, err |
| 471 | } |
| 472 | if n != 4 { |
| 473 | return 0, EIO |
| 474 | } |
| 475 | return *(*uint32)(unsafe.Pointer(&buf[0])), nil |
| 476 | } |
| 477 | |
| 478 | func SysctlUint64(name string, args ...int) (uint64, error) { |
| 479 | mib, err := sysctlmib(name, args...) |
| 480 | if err != nil { |
| 481 | return 0, err |
| 482 | } |
| 483 | |
| 484 | n := uintptr(8) |
| 485 | buf := make([]byte, 8) |
| 486 | if err := sysctl(mib, &buf[0], &n, nil, 0); err != nil { |
| 487 | return 0, err |
| 488 | } |
| 489 | if n != 8 { |
| 490 | return 0, EIO |
| 491 | } |
| 492 | return *(*uint64)(unsafe.Pointer(&buf[0])), nil |
| 493 | } |
| 494 | |
| 495 | func SysctlRaw(name string, args ...int) ([]byte, error) { |
| 496 | mib, err := sysctlmib(name, args...) |
| 497 | if err != nil { |
| 498 | return nil, err |
| 499 | } |
| 500 | |
| 501 | // Find size. |
| 502 | n := uintptr(0) |
| 503 | if err := sysctl(mib, nil, &n, nil, 0); err != nil { |
| 504 | return nil, err |
| 505 | } |
| 506 | if n == 0 { |
| 507 | return nil, nil |
| 508 | } |
| 509 | |
| 510 | // Read into buffer of that size. |
| 511 | buf := make([]byte, n) |
| 512 | if err := sysctl(mib, &buf[0], &n, nil, 0); err != nil { |
| 513 | return nil, err |
| 514 | } |
| 515 | |
| 516 | // The actual call may return less than the original reported required |
| 517 | // size so ensure we deal with that. |
| 518 | return buf[:n], nil |
| 519 | } |
| 520 | |
| 521 | //sys utimes(path string, timeval *[2]Timeval) (err error) |
| 522 | |
| 523 | func Utimes(path string, tv []Timeval) error { |
| 524 | if tv == nil { |
| 525 | return utimes(path, nil) |
| 526 | } |
| 527 | if len(tv) != 2 { |
| 528 | return EINVAL |
| 529 | } |
| 530 | return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
| 531 | } |
| 532 | |
| 533 | func UtimesNano(path string, ts []Timespec) error { |
| 534 | if ts == nil { |
| 535 | err := utimensat(AT_FDCWD, path, nil, 0) |
| 536 | if err != ENOSYS { |
| 537 | return err |
| 538 | } |
| 539 | return utimes(path, nil) |
| 540 | } |
| 541 | if len(ts) != 2 { |
| 542 | return EINVAL |
| 543 | } |
| 544 | // Darwin setattrlist can set nanosecond timestamps |
| 545 | err := setattrlistTimes(path, ts, 0) |
| 546 | if err != ENOSYS { |
| 547 | return err |
| 548 | } |
| 549 | err = utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) |
| 550 | if err != ENOSYS { |
| 551 | return err |
| 552 | } |
| 553 | // Not as efficient as it could be because Timespec and |
| 554 | // Timeval have different types in the different OSes |
| 555 | tv := [2]Timeval{ |
| 556 | NsecToTimeval(TimespecToNsec(ts[0])), |
| 557 | NsecToTimeval(TimespecToNsec(ts[1])), |
| 558 | } |
| 559 | return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
| 560 | } |
| 561 | |
| 562 | func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error { |
| 563 | if ts == nil { |
| 564 | return utimensat(dirfd, path, nil, flags) |
| 565 | } |
| 566 | if len(ts) != 2 { |
| 567 | return EINVAL |
| 568 | } |
| 569 | err := setattrlistTimes(path, ts, flags) |
| 570 | if err != ENOSYS { |
| 571 | return err |
| 572 | } |
| 573 | return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags) |
| 574 | } |
| 575 | |
| 576 | //sys futimes(fd int, timeval *[2]Timeval) (err error) |
| 577 | |
| 578 | func Futimes(fd int, tv []Timeval) error { |
| 579 | if tv == nil { |
| 580 | return futimes(fd, nil) |
| 581 | } |
| 582 | if len(tv) != 2 { |
| 583 | return EINVAL |
| 584 | } |
| 585 | return futimes(fd, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
| 586 | } |
| 587 | |
| 588 | //sys fcntl(fd int, cmd int, arg int) (val int, err error) |
| 589 | |
| 590 | //sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) |
| 591 | |
| 592 | func Poll(fds []PollFd, timeout int) (n int, err error) { |
| 593 | if len(fds) == 0 { |
| 594 | return poll(nil, 0, timeout) |
| 595 | } |
| 596 | return poll(&fds[0], len(fds), timeout) |
| 597 | } |
| 598 | |
| 599 | // TODO: wrap |
| 600 | // Acct(name nil-string) (err error) |
| 601 | // Gethostuuid(uuid *byte, timeout *Timespec) (err error) |
| 602 | // Ptrace(req int, pid int, addr uintptr, data int) (ret uintptr, err error) |
| 603 | |
| 604 | var mapper = &mmapper{ |
| 605 | active: make(map[*byte][]byte), |
| 606 | mmap: mmap, |
| 607 | munmap: munmap, |
| 608 | } |
| 609 | |
| 610 | func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { |
| 611 | return mapper.Mmap(fd, offset, length, prot, flags) |
| 612 | } |
| 613 | |
| 614 | func Munmap(b []byte) (err error) { |
| 615 | return mapper.Munmap(b) |
| 616 | } |
| 617 | |
| 618 | //sys Madvise(b []byte, behav int) (err error) |
| 619 | //sys Mlock(b []byte) (err error) |
| 620 | //sys Mlockall(flags int) (err error) |
| 621 | //sys Mprotect(b []byte, prot int) (err error) |
| 622 | //sys Msync(b []byte, flags int) (err error) |
| 623 | //sys Munlock(b []byte) (err error) |
| 624 | //sys Munlockall() (err error) |