projects / github / fretlink / terraform-provider-statuscake.git / blame
| Commit | Line | Data |
|---|---|---|
| 9b12e4fe JC |
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 linux netbsd openbsd solaris | |
| 6 | ||
| 7 | package unix | |
| 8 | ||
| 9 | import ( | |
| 10 | "runtime" | |
| 11 | "sync" | |
| 12 | "syscall" | |
| 13 | "unsafe" | |
| 14 | ) | |
| 15 | ||
| 16 | var ( | |
| 17 | Stdin = 0 | |
| 18 | Stdout = 1 | |
| 19 | Stderr = 2 | |
| 20 | ) | |
| 21 | ||
| 22 | const ( | |
| 23 | darwin64Bit = runtime.GOOS == "darwin" && sizeofPtr == 8 | |
| 24 | dragonfly64Bit = runtime.GOOS == "dragonfly" && sizeofPtr == 8 | |
| 25 | netbsd32Bit = runtime.GOOS == "netbsd" && sizeofPtr == 4 | |
| 26 | ) | |
| 27 | ||
| 28 | // Do the interface allocations only once for common | |
| 29 | // Errno values. | |
| 30 | var ( | |
| 31 | errEAGAIN error = syscall.EAGAIN | |
| 32 | errEINVAL error = syscall.EINVAL | |
| 33 | errENOENT error = syscall.ENOENT | |
| 34 | ) | |
| 35 | ||
| 36 | // errnoErr returns common boxed Errno values, to prevent | |
| 37 | // allocations at runtime. | |
| 38 | func errnoErr(e syscall.Errno) error { | |
| 39 | switch e { | |
| 40 | case 0: | |
| 41 | return nil | |
| 42 | case EAGAIN: | |
| 43 | return errEAGAIN | |
| 44 | case EINVAL: | |
| 45 | return errEINVAL | |
| 46 | case ENOENT: | |
| 47 | return errENOENT | |
| 48 | } | |
| 49 | return e | |
| 50 | } | |
| 51 | ||
| 52 | func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno) | |
| 53 | func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) | |
| 54 | func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno) | |
| 55 | func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) | |
| 56 | ||
| 57 | // Mmap manager, for use by operating system-specific implementations. | |
| 58 | ||
| 59 | type mmapper struct { | |
| 60 | sync.Mutex | |
| 61 | active map[*byte][]byte // active mappings; key is last byte in mapping | |
| 62 | mmap func(addr, length uintptr, prot, flags, fd int, offset int64) (uintptr, error) | |
| 63 | munmap func(addr uintptr, length uintptr) error | |
| 64 | } | |
| 65 | ||
| 66 | func (m *mmapper) Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { | |
| 67 | if length <= 0 { | |
| 68 | return nil, EINVAL | |
| 69 | } | |
| 70 | ||
| 71 | // Map the requested memory. | |
| 72 | addr, errno := m.mmap(0, uintptr(length), prot, flags, fd, offset) | |
| 73 | if errno != nil { | |
| 74 | return nil, errno | |
| 75 | } | |
| 76 | ||
| 77 | // Slice memory layout | |
| 78 | var sl = struct { | |
| 79 | addr uintptr | |
| 80 | len int | |
| 81 | cap int | |
| 82 | }{addr, length, length} | |
| 83 | ||
| 84 | // Use unsafe to turn sl into a []byte. | |
| 85 | b := *(*[]byte)(unsafe.Pointer(&sl)) | |
| 86 | ||
| 87 | // Register mapping in m and return it. | |
| 88 | p := &b[cap(b)-1] | |
| 89 | m.Lock() | |
| 90 | defer m.Unlock() | |
| 91 | m.active[p] = b | |
| 92 | return b, nil | |
| 93 | } | |
| 94 | ||
| 95 | func (m *mmapper) Munmap(data []byte) (err error) { | |
| 96 | if len(data) == 0 || len(data) != cap(data) { | |
| 97 | return EINVAL | |
| 98 | } | |
| 99 | ||
| 100 | // Find the base of the mapping. | |
| 101 | p := &data[cap(data)-1] | |
| 102 | m.Lock() | |
| 103 | defer m.Unlock() | |
| 104 | b := m.active[p] | |
| 105 | if b == nil || &b[0] != &data[0] { | |
| 106 | return EINVAL | |
| 107 | } | |
| 108 | ||
| 109 | // Unmap the memory and update m. | |
| 110 | if errno := m.munmap(uintptr(unsafe.Pointer(&b[0])), uintptr(len(b))); errno != nil { | |
| 111 | return errno | |
| 112 | } | |
| 113 | delete(m.active, p) | |
| 114 | return nil | |
| 115 | } | |
| 116 | ||
| 117 | func Read(fd int, p []byte) (n int, err error) { | |
| 118 | n, err = read(fd, p) | |
| 119 | if raceenabled { | |
| 120 | if n > 0 { | |
| 121 | raceWriteRange(unsafe.Pointer(&p[0]), n) | |
| 122 | } | |
| 123 | if err == nil { | |
| 124 | raceAcquire(unsafe.Pointer(&ioSync)) | |
| 125 | } | |
| 126 | } | |
| 127 | return | |
| 128 | } | |
| 129 | ||
| 130 | func Write(fd int, p []byte) (n int, err error) { | |
| 131 | if raceenabled { | |
| 132 | raceReleaseMerge(unsafe.Pointer(&ioSync)) | |
| 133 | } | |
| 134 | n, err = write(fd, p) | |
| 135 | if raceenabled && n > 0 { | |
| 136 | raceReadRange(unsafe.Pointer(&p[0]), n) | |
| 137 | } | |
| 138 | return | |
| 139 | } | |
| 140 | ||
| 141 | // For testing: clients can set this flag to force | |
| 142 | // creation of IPv6 sockets to return EAFNOSUPPORT. | |
| 143 | var SocketDisableIPv6 bool | |
| 144 | ||
| 145 | type Sockaddr interface { | |
| 146 | sockaddr() (ptr unsafe.Pointer, len _Socklen, err error) // lowercase; only we can define Sockaddrs | |
| 147 | } | |
| 148 | ||
| 149 | type SockaddrInet4 struct { | |
| 150 | Port int | |
| 151 | Addr [4]byte | |
| 152 | raw RawSockaddrInet4 | |
| 153 | } | |
| 154 | ||
| 155 | type SockaddrInet6 struct { | |
| 156 | Port int | |
| 157 | ZoneId uint32 | |
| 158 | Addr [16]byte | |
| 159 | raw RawSockaddrInet6 | |
| 160 | } | |
| 161 | ||
| 162 | type SockaddrUnix struct { | |
| 163 | Name string | |
| 164 | raw RawSockaddrUnix | |
| 165 | } | |
| 166 | ||
| 167 | func Bind(fd int, sa Sockaddr) (err error) { | |
| 168 | ptr, n, err := sa.sockaddr() | |
| 169 | if err != nil { | |
| 170 | return err | |
| 171 | } | |
| 172 | return bind(fd, ptr, n) | |
| 173 | } | |
| 174 | ||
| 175 | func Connect(fd int, sa Sockaddr) (err error) { | |
| 176 | ptr, n, err := sa.sockaddr() | |
| 177 | if err != nil { | |
| 178 | return err | |
| 179 | } | |
| 180 | return connect(fd, ptr, n) | |
| 181 | } | |
| 182 | ||
| 183 | func Getpeername(fd int) (sa Sockaddr, err error) { | |
| 184 | var rsa RawSockaddrAny | |
| 185 | var len _Socklen = SizeofSockaddrAny | |
| 186 | if err = getpeername(fd, &rsa, &len); err != nil { | |
| 187 | return | |
| 188 | } | |
| 189 | return anyToSockaddr(&rsa) | |
| 190 | } | |
| 191 | ||
| 192 | func GetsockoptInt(fd, level, opt int) (value int, err error) { | |
| 193 | var n int32 | |
| 194 | vallen := _Socklen(4) | |
| 195 | err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) | |
| 196 | return int(n), err | |
| 197 | } | |
| 198 | ||
| 199 | func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, err error) { | |
| 200 | var rsa RawSockaddrAny | |
| 201 | var len _Socklen = SizeofSockaddrAny | |
| 202 | if n, err = recvfrom(fd, p, flags, &rsa, &len); err != nil { | |
| 203 | return | |
| 204 | } | |
| 205 | if rsa.Addr.Family != AF_UNSPEC { | |
| 206 | from, err = anyToSockaddr(&rsa) | |
| 207 | } | |
| 208 | return | |
| 209 | } | |
| 210 | ||
| 211 | func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) { | |
| 212 | ptr, n, err := to.sockaddr() | |
| 213 | if err != nil { | |
| 214 | return err | |
| 215 | } | |
| 216 | return sendto(fd, p, flags, ptr, n) | |
| 217 | } | |
| 218 | ||
| 219 | func SetsockoptByte(fd, level, opt int, value byte) (err error) { | |
| 220 | return setsockopt(fd, level, opt, unsafe.Pointer(&value), 1) | |
| 221 | } | |
| 222 | ||
| 223 | func SetsockoptInt(fd, level, opt int, value int) (err error) { | |
| 224 | var n = int32(value) | |
| 225 | return setsockopt(fd, level, opt, unsafe.Pointer(&n), 4) | |
| 226 | } | |
| 227 | ||
| 228 | func SetsockoptInet4Addr(fd, level, opt int, value [4]byte) (err error) { | |
| 229 | return setsockopt(fd, level, opt, unsafe.Pointer(&value[0]), 4) | |
| 230 | } | |
| 231 | ||
| 232 | func SetsockoptIPMreq(fd, level, opt int, mreq *IPMreq) (err error) { | |
| 233 | return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPMreq) | |
| 234 | } | |
| 235 | ||
| 236 | func SetsockoptIPv6Mreq(fd, level, opt int, mreq *IPv6Mreq) (err error) { | |
| 237 | return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPv6Mreq) | |
| 238 | } | |
| 239 | ||
| 240 | func SetsockoptICMPv6Filter(fd, level, opt int, filter *ICMPv6Filter) error { | |
| 241 | return setsockopt(fd, level, opt, unsafe.Pointer(filter), SizeofICMPv6Filter) | |
| 242 | } | |
| 243 | ||
| 244 | func SetsockoptLinger(fd, level, opt int, l *Linger) (err error) { | |
| 245 | return setsockopt(fd, level, opt, unsafe.Pointer(l), SizeofLinger) | |
| 246 | } | |
| 247 | ||
| 248 | func SetsockoptString(fd, level, opt int, s string) (err error) { | |
| 249 | return setsockopt(fd, level, opt, unsafe.Pointer(&[]byte(s)[0]), uintptr(len(s))) | |
| 250 | } | |
| 251 | ||
| 252 | func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (err error) { | |
| 253 | return setsockopt(fd, level, opt, unsafe.Pointer(tv), unsafe.Sizeof(*tv)) | |
| 254 | } | |
| 255 | ||
| 256 | func Socket(domain, typ, proto int) (fd int, err error) { | |
| 257 | if domain == AF_INET6 && SocketDisableIPv6 { | |
| 258 | return -1, EAFNOSUPPORT | |
| 259 | } | |
| 260 | fd, err = socket(domain, typ, proto) | |
| 261 | return | |
| 262 | } | |
| 263 | ||
| 264 | func Socketpair(domain, typ, proto int) (fd [2]int, err error) { | |
| 265 | var fdx [2]int32 | |
| 266 | err = socketpair(domain, typ, proto, &fdx) | |
| 267 | if err == nil { | |
| 268 | fd[0] = int(fdx[0]) | |
| 269 | fd[1] = int(fdx[1]) | |
| 270 | } | |
| 271 | return | |
| 272 | } | |
| 273 | ||
| 274 | func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { | |
| 275 | if raceenabled { | |
| 276 | raceReleaseMerge(unsafe.Pointer(&ioSync)) | |
| 277 | } | |
| 278 | return sendfile(outfd, infd, offset, count) | |
| 279 | } | |
| 280 | ||
| 281 | var ioSync int64 | |
| 282 | ||
| 283 | func CloseOnExec(fd int) { fcntl(fd, F_SETFD, FD_CLOEXEC) } | |
| 284 | ||
| 285 | func SetNonblock(fd int, nonblocking bool) (err error) { | |
| 286 | flag, err := fcntl(fd, F_GETFL, 0) | |
| 287 | if err != nil { | |
| 288 | return err | |
| 289 | } | |
| 290 | if nonblocking { | |
| 291 | flag |= O_NONBLOCK | |
| 292 | } else { | |
| 293 | flag &= ^O_NONBLOCK | |
| 294 | } | |
| 295 | _, err = fcntl(fd, F_SETFL, flag) | |
| 296 | return err | |
| 297 | } |