Naveen Sampath | 04696f7 | 2022-06-13 15:19:14 +0530 | [diff] [blame] | 1 | // Copyright 2020 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 | //go:build zos && s390x |
| 6 | // +build zos,s390x |
| 7 | |
| 8 | package unix |
| 9 | |
| 10 | import ( |
| 11 | "bytes" |
| 12 | "runtime" |
| 13 | "sort" |
| 14 | "sync" |
| 15 | "syscall" |
| 16 | "unsafe" |
| 17 | ) |
| 18 | |
| 19 | const ( |
| 20 | O_CLOEXEC = 0 // Dummy value (not supported). |
| 21 | AF_LOCAL = AF_UNIX // AF_LOCAL is an alias for AF_UNIX |
| 22 | ) |
| 23 | |
| 24 | func syscall_syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) |
| 25 | func syscall_rawsyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) |
| 26 | func syscall_syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) |
| 27 | func syscall_rawsyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) |
| 28 | func syscall_syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) |
| 29 | func syscall_rawsyscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) |
| 30 | |
| 31 | func copyStat(stat *Stat_t, statLE *Stat_LE_t) { |
| 32 | stat.Dev = uint64(statLE.Dev) |
| 33 | stat.Ino = uint64(statLE.Ino) |
| 34 | stat.Nlink = uint64(statLE.Nlink) |
| 35 | stat.Mode = uint32(statLE.Mode) |
| 36 | stat.Uid = uint32(statLE.Uid) |
| 37 | stat.Gid = uint32(statLE.Gid) |
| 38 | stat.Rdev = uint64(statLE.Rdev) |
| 39 | stat.Size = statLE.Size |
| 40 | stat.Atim.Sec = int64(statLE.Atim) |
| 41 | stat.Atim.Nsec = 0 //zos doesn't return nanoseconds |
| 42 | stat.Mtim.Sec = int64(statLE.Mtim) |
| 43 | stat.Mtim.Nsec = 0 //zos doesn't return nanoseconds |
| 44 | stat.Ctim.Sec = int64(statLE.Ctim) |
| 45 | stat.Ctim.Nsec = 0 //zos doesn't return nanoseconds |
| 46 | stat.Blksize = int64(statLE.Blksize) |
| 47 | stat.Blocks = statLE.Blocks |
| 48 | } |
| 49 | |
| 50 | func svcCall(fnptr unsafe.Pointer, argv *unsafe.Pointer, dsa *uint64) |
| 51 | func svcLoad(name *byte) unsafe.Pointer |
| 52 | func svcUnload(name *byte, fnptr unsafe.Pointer) int64 |
| 53 | |
| 54 | func (d *Dirent) NameString() string { |
| 55 | if d == nil { |
| 56 | return "" |
| 57 | } |
| 58 | return string(d.Name[:d.Namlen]) |
| 59 | } |
| 60 | |
| 61 | func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 62 | if sa.Port < 0 || sa.Port > 0xFFFF { |
| 63 | return nil, 0, EINVAL |
| 64 | } |
| 65 | sa.raw.Len = SizeofSockaddrInet4 |
| 66 | sa.raw.Family = AF_INET |
| 67 | p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) |
| 68 | p[0] = byte(sa.Port >> 8) |
| 69 | p[1] = byte(sa.Port) |
| 70 | sa.raw.Addr = sa.Addr |
| 71 | return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil |
| 72 | } |
| 73 | |
| 74 | func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 75 | if sa.Port < 0 || sa.Port > 0xFFFF { |
| 76 | return nil, 0, EINVAL |
| 77 | } |
| 78 | sa.raw.Len = SizeofSockaddrInet6 |
| 79 | sa.raw.Family = AF_INET6 |
| 80 | p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) |
| 81 | p[0] = byte(sa.Port >> 8) |
| 82 | p[1] = byte(sa.Port) |
| 83 | sa.raw.Scope_id = sa.ZoneId |
| 84 | sa.raw.Addr = sa.Addr |
| 85 | return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil |
| 86 | } |
| 87 | |
| 88 | func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) { |
| 89 | name := sa.Name |
| 90 | n := len(name) |
| 91 | if n >= len(sa.raw.Path) || n == 0 { |
| 92 | return nil, 0, EINVAL |
| 93 | } |
| 94 | sa.raw.Len = byte(3 + n) // 2 for Family, Len; 1 for NUL |
| 95 | sa.raw.Family = AF_UNIX |
| 96 | for i := 0; i < n; i++ { |
| 97 | sa.raw.Path[i] = int8(name[i]) |
| 98 | } |
| 99 | return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil |
| 100 | } |
| 101 | |
| 102 | func anyToSockaddr(_ int, rsa *RawSockaddrAny) (Sockaddr, error) { |
| 103 | // TODO(neeilan): Implement use of first param (fd) |
| 104 | switch rsa.Addr.Family { |
| 105 | case AF_UNIX: |
| 106 | pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) |
| 107 | sa := new(SockaddrUnix) |
| 108 | // For z/OS, only replace NUL with @ when the |
| 109 | // length is not zero. |
| 110 | if pp.Len != 0 && pp.Path[0] == 0 { |
| 111 | // "Abstract" Unix domain socket. |
| 112 | // Rewrite leading NUL as @ for textual display. |
| 113 | // (This is the standard convention.) |
| 114 | // Not friendly to overwrite in place, |
| 115 | // but the callers below don't care. |
| 116 | pp.Path[0] = '@' |
| 117 | } |
| 118 | |
| 119 | // Assume path ends at NUL. |
| 120 | // |
| 121 | // For z/OS, the length of the name is a field |
| 122 | // in the structure. To be on the safe side, we |
| 123 | // will still scan the name for a NUL but only |
| 124 | // to the length provided in the structure. |
| 125 | // |
| 126 | // This is not technically the Linux semantics for |
| 127 | // abstract Unix domain sockets--they are supposed |
| 128 | // to be uninterpreted fixed-size binary blobs--but |
| 129 | // everyone uses this convention. |
| 130 | n := 0 |
| 131 | for n < int(pp.Len) && pp.Path[n] != 0 { |
| 132 | n++ |
| 133 | } |
| 134 | bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n] |
| 135 | sa.Name = string(bytes) |
| 136 | return sa, nil |
| 137 | |
| 138 | case AF_INET: |
| 139 | pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) |
| 140 | sa := new(SockaddrInet4) |
| 141 | p := (*[2]byte)(unsafe.Pointer(&pp.Port)) |
| 142 | sa.Port = int(p[0])<<8 + int(p[1]) |
| 143 | sa.Addr = pp.Addr |
| 144 | return sa, nil |
| 145 | |
| 146 | case AF_INET6: |
| 147 | pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) |
| 148 | sa := new(SockaddrInet6) |
| 149 | p := (*[2]byte)(unsafe.Pointer(&pp.Port)) |
| 150 | sa.Port = int(p[0])<<8 + int(p[1]) |
| 151 | sa.ZoneId = pp.Scope_id |
| 152 | sa.Addr = pp.Addr |
| 153 | return sa, nil |
| 154 | } |
| 155 | return nil, EAFNOSUPPORT |
| 156 | } |
| 157 | |
| 158 | func Accept(fd int) (nfd int, sa Sockaddr, err error) { |
| 159 | var rsa RawSockaddrAny |
| 160 | var len _Socklen = SizeofSockaddrAny |
| 161 | nfd, err = accept(fd, &rsa, &len) |
| 162 | if err != nil { |
| 163 | return |
| 164 | } |
| 165 | // TODO(neeilan): Remove 0 in call |
| 166 | sa, err = anyToSockaddr(0, &rsa) |
| 167 | if err != nil { |
| 168 | Close(nfd) |
| 169 | nfd = 0 |
| 170 | } |
| 171 | return |
| 172 | } |
| 173 | |
| 174 | func (iov *Iovec) SetLen(length int) { |
| 175 | iov.Len = uint64(length) |
| 176 | } |
| 177 | |
| 178 | func (msghdr *Msghdr) SetControllen(length int) { |
| 179 | msghdr.Controllen = int32(length) |
| 180 | } |
| 181 | |
| 182 | func (cmsg *Cmsghdr) SetLen(length int) { |
| 183 | cmsg.Len = int32(length) |
| 184 | } |
| 185 | |
| 186 | //sys fcntl(fd int, cmd int, arg int) (val int, err error) |
| 187 | //sys read(fd int, p []byte) (n int, err error) |
| 188 | //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ |
| 189 | //sys write(fd int, p []byte) (n int, err error) |
| 190 | |
| 191 | //sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) = SYS___ACCEPT_A |
| 192 | //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = SYS___BIND_A |
| 193 | //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = SYS___CONNECT_A |
| 194 | //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) |
| 195 | //sysnb setgroups(n int, list *_Gid_t) (err error) |
| 196 | //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) |
| 197 | //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) |
| 198 | //sysnb socket(domain int, typ int, proto int) (fd int, err error) |
| 199 | //sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) |
| 200 | //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = SYS___GETPEERNAME_A |
| 201 | //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = SYS___GETSOCKNAME_A |
| 202 | //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) = SYS___RECVFROM_A |
| 203 | //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) = SYS___SENDTO_A |
| 204 | //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = SYS___RECVMSG_A |
| 205 | //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = SYS___SENDMSG_A |
| 206 | //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) = SYS_MMAP |
| 207 | //sys munmap(addr uintptr, length uintptr) (err error) = SYS_MUNMAP |
| 208 | //sys ioctl(fd int, req uint, arg uintptr) (err error) = SYS_IOCTL |
| 209 | |
| 210 | //sys Access(path string, mode uint32) (err error) = SYS___ACCESS_A |
| 211 | //sys Chdir(path string) (err error) = SYS___CHDIR_A |
| 212 | //sys Chown(path string, uid int, gid int) (err error) = SYS___CHOWN_A |
| 213 | //sys Chmod(path string, mode uint32) (err error) = SYS___CHMOD_A |
| 214 | //sys Creat(path string, mode uint32) (fd int, err error) = SYS___CREAT_A |
| 215 | //sys Dup(oldfd int) (fd int, err error) |
| 216 | //sys Dup2(oldfd int, newfd int) (err error) |
| 217 | //sys Errno2() (er2 int) = SYS___ERRNO2 |
| 218 | //sys Err2ad() (eadd *int) = SYS___ERR2AD |
| 219 | //sys Exit(code int) |
| 220 | //sys Fchdir(fd int) (err error) |
| 221 | //sys Fchmod(fd int, mode uint32) (err error) |
| 222 | //sys Fchown(fd int, uid int, gid int) (err error) |
| 223 | //sys FcntlInt(fd uintptr, cmd int, arg int) (retval int, err error) = SYS_FCNTL |
| 224 | //sys fstat(fd int, stat *Stat_LE_t) (err error) |
| 225 | |
| 226 | func Fstat(fd int, stat *Stat_t) (err error) { |
| 227 | var statLE Stat_LE_t |
| 228 | err = fstat(fd, &statLE) |
| 229 | copyStat(stat, &statLE) |
| 230 | return |
| 231 | } |
| 232 | |
| 233 | //sys Fstatvfs(fd int, stat *Statvfs_t) (err error) = SYS_FSTATVFS |
| 234 | //sys Fsync(fd int) (err error) |
| 235 | //sys Ftruncate(fd int, length int64) (err error) |
| 236 | //sys Getpagesize() (pgsize int) = SYS_GETPAGESIZE |
| 237 | //sys Mprotect(b []byte, prot int) (err error) = SYS_MPROTECT |
| 238 | //sys Msync(b []byte, flags int) (err error) = SYS_MSYNC |
| 239 | //sys Poll(fds []PollFd, timeout int) (n int, err error) = SYS_POLL |
| 240 | //sys Times(tms *Tms) (ticks uintptr, err error) = SYS_TIMES |
| 241 | //sys W_Getmntent(buff *byte, size int) (lastsys int, err error) = SYS_W_GETMNTENT |
| 242 | //sys W_Getmntent_A(buff *byte, size int) (lastsys int, err error) = SYS___W_GETMNTENT_A |
| 243 | |
| 244 | //sys mount_LE(path string, filesystem string, fstype string, mtm uint32, parmlen int32, parm string) (err error) = SYS___MOUNT_A |
| 245 | //sys unmount(filesystem string, mtm int) (err error) = SYS___UMOUNT_A |
| 246 | //sys Chroot(path string) (err error) = SYS___CHROOT_A |
| 247 | //sys Select(nmsgsfds int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (ret int, err error) = SYS_SELECT |
| 248 | //sysnb Uname(buf *Utsname) (err error) = SYS___UNAME_A |
| 249 | |
| 250 | func Ptsname(fd int) (name string, err error) { |
| 251 | r0, _, e1 := syscall_syscall(SYS___PTSNAME_A, uintptr(fd), 0, 0) |
| 252 | name = u2s(unsafe.Pointer(r0)) |
| 253 | if e1 != 0 { |
| 254 | err = errnoErr(e1) |
| 255 | } |
| 256 | return |
| 257 | } |
| 258 | |
| 259 | func u2s(cstr unsafe.Pointer) string { |
| 260 | str := (*[1024]uint8)(cstr) |
| 261 | i := 0 |
| 262 | for str[i] != 0 { |
| 263 | i++ |
| 264 | } |
| 265 | return string(str[:i]) |
| 266 | } |
| 267 | |
| 268 | func Close(fd int) (err error) { |
| 269 | _, _, e1 := syscall_syscall(SYS_CLOSE, uintptr(fd), 0, 0) |
| 270 | for i := 0; e1 == EAGAIN && i < 10; i++ { |
| 271 | _, _, _ = syscall_syscall(SYS_USLEEP, uintptr(10), 0, 0) |
| 272 | _, _, e1 = syscall_syscall(SYS_CLOSE, uintptr(fd), 0, 0) |
| 273 | } |
| 274 | if e1 != 0 { |
| 275 | err = errnoErr(e1) |
| 276 | } |
| 277 | return |
| 278 | } |
| 279 | |
| 280 | var mapper = &mmapper{ |
| 281 | active: make(map[*byte][]byte), |
| 282 | mmap: mmap, |
| 283 | munmap: munmap, |
| 284 | } |
| 285 | |
| 286 | // Dummy function: there are no semantics for Madvise on z/OS |
| 287 | func Madvise(b []byte, advice int) (err error) { |
| 288 | return |
| 289 | } |
| 290 | |
| 291 | func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { |
| 292 | return mapper.Mmap(fd, offset, length, prot, flags) |
| 293 | } |
| 294 | |
| 295 | func Munmap(b []byte) (err error) { |
| 296 | return mapper.Munmap(b) |
| 297 | } |
| 298 | |
| 299 | //sys Gethostname(buf []byte) (err error) = SYS___GETHOSTNAME_A |
| 300 | //sysnb Getegid() (egid int) |
| 301 | //sysnb Geteuid() (uid int) |
| 302 | //sysnb Getgid() (gid int) |
| 303 | //sysnb Getpid() (pid int) |
| 304 | //sysnb Getpgid(pid int) (pgid int, err error) = SYS_GETPGID |
| 305 | |
| 306 | func Getpgrp() (pid int) { |
| 307 | pid, _ = Getpgid(0) |
| 308 | return |
| 309 | } |
| 310 | |
| 311 | //sysnb Getppid() (pid int) |
| 312 | //sys Getpriority(which int, who int) (prio int, err error) |
| 313 | //sysnb Getrlimit(resource int, rlim *Rlimit) (err error) = SYS_GETRLIMIT |
| 314 | |
| 315 | //sysnb getrusage(who int, rusage *rusage_zos) (err error) = SYS_GETRUSAGE |
| 316 | |
| 317 | func Getrusage(who int, rusage *Rusage) (err error) { |
| 318 | var ruz rusage_zos |
| 319 | err = getrusage(who, &ruz) |
| 320 | //Only the first two fields of Rusage are set |
| 321 | rusage.Utime.Sec = ruz.Utime.Sec |
| 322 | rusage.Utime.Usec = int64(ruz.Utime.Usec) |
| 323 | rusage.Stime.Sec = ruz.Stime.Sec |
| 324 | rusage.Stime.Usec = int64(ruz.Stime.Usec) |
| 325 | return |
| 326 | } |
| 327 | |
| 328 | //sysnb Getsid(pid int) (sid int, err error) = SYS_GETSID |
| 329 | //sysnb Getuid() (uid int) |
| 330 | //sysnb Kill(pid int, sig Signal) (err error) |
| 331 | //sys Lchown(path string, uid int, gid int) (err error) = SYS___LCHOWN_A |
| 332 | //sys Link(path string, link string) (err error) = SYS___LINK_A |
| 333 | //sys Listen(s int, n int) (err error) |
| 334 | //sys lstat(path string, stat *Stat_LE_t) (err error) = SYS___LSTAT_A |
| 335 | |
| 336 | func Lstat(path string, stat *Stat_t) (err error) { |
| 337 | var statLE Stat_LE_t |
| 338 | err = lstat(path, &statLE) |
| 339 | copyStat(stat, &statLE) |
| 340 | return |
| 341 | } |
| 342 | |
| 343 | //sys Mkdir(path string, mode uint32) (err error) = SYS___MKDIR_A |
| 344 | //sys Mkfifo(path string, mode uint32) (err error) = SYS___MKFIFO_A |
| 345 | //sys Mknod(path string, mode uint32, dev int) (err error) = SYS___MKNOD_A |
| 346 | //sys Pread(fd int, p []byte, offset int64) (n int, err error) |
| 347 | //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) |
| 348 | //sys Readlink(path string, buf []byte) (n int, err error) = SYS___READLINK_A |
| 349 | //sys Rename(from string, to string) (err error) = SYS___RENAME_A |
| 350 | //sys Rmdir(path string) (err error) = SYS___RMDIR_A |
| 351 | //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK |
| 352 | //sys Setpriority(which int, who int, prio int) (err error) |
| 353 | //sysnb Setpgid(pid int, pgid int) (err error) = SYS_SETPGID |
| 354 | //sysnb Setrlimit(resource int, lim *Rlimit) (err error) |
| 355 | //sysnb Setregid(rgid int, egid int) (err error) = SYS_SETREGID |
| 356 | //sysnb Setreuid(ruid int, euid int) (err error) = SYS_SETREUID |
| 357 | //sysnb Setsid() (pid int, err error) = SYS_SETSID |
| 358 | //sys Setuid(uid int) (err error) = SYS_SETUID |
| 359 | //sys Setgid(uid int) (err error) = SYS_SETGID |
| 360 | //sys Shutdown(fd int, how int) (err error) |
| 361 | //sys stat(path string, statLE *Stat_LE_t) (err error) = SYS___STAT_A |
| 362 | |
| 363 | func Stat(path string, sta *Stat_t) (err error) { |
| 364 | var statLE Stat_LE_t |
| 365 | err = stat(path, &statLE) |
| 366 | copyStat(sta, &statLE) |
| 367 | return |
| 368 | } |
| 369 | |
| 370 | //sys Symlink(path string, link string) (err error) = SYS___SYMLINK_A |
| 371 | //sys Sync() = SYS_SYNC |
| 372 | //sys Truncate(path string, length int64) (err error) = SYS___TRUNCATE_A |
| 373 | //sys Tcgetattr(fildes int, termptr *Termios) (err error) = SYS_TCGETATTR |
| 374 | //sys Tcsetattr(fildes int, when int, termptr *Termios) (err error) = SYS_TCSETATTR |
| 375 | //sys Umask(mask int) (oldmask int) |
| 376 | //sys Unlink(path string) (err error) = SYS___UNLINK_A |
| 377 | //sys Utime(path string, utim *Utimbuf) (err error) = SYS___UTIME_A |
| 378 | |
| 379 | //sys open(path string, mode int, perm uint32) (fd int, err error) = SYS___OPEN_A |
| 380 | |
| 381 | func Open(path string, mode int, perm uint32) (fd int, err error) { |
| 382 | return open(path, mode, perm) |
| 383 | } |
| 384 | |
| 385 | func Mkfifoat(dirfd int, path string, mode uint32) (err error) { |
| 386 | wd, err := Getwd() |
| 387 | if err != nil { |
| 388 | return err |
| 389 | } |
| 390 | |
| 391 | if err := Fchdir(dirfd); err != nil { |
| 392 | return err |
| 393 | } |
| 394 | defer Chdir(wd) |
| 395 | |
| 396 | return Mkfifo(path, mode) |
| 397 | } |
| 398 | |
| 399 | //sys remove(path string) (err error) |
| 400 | |
| 401 | func Remove(path string) error { |
| 402 | return remove(path) |
| 403 | } |
| 404 | |
| 405 | const ImplementsGetwd = true |
| 406 | |
| 407 | func Getcwd(buf []byte) (n int, err error) { |
| 408 | var p unsafe.Pointer |
| 409 | if len(buf) > 0 { |
| 410 | p = unsafe.Pointer(&buf[0]) |
| 411 | } else { |
| 412 | p = unsafe.Pointer(&_zero) |
| 413 | } |
| 414 | _, _, e := syscall_syscall(SYS___GETCWD_A, uintptr(p), uintptr(len(buf)), 0) |
| 415 | n = clen(buf) + 1 |
| 416 | if e != 0 { |
| 417 | err = errnoErr(e) |
| 418 | } |
| 419 | return |
| 420 | } |
| 421 | |
| 422 | func Getwd() (wd string, err error) { |
| 423 | var buf [PathMax]byte |
| 424 | n, err := Getcwd(buf[0:]) |
| 425 | if err != nil { |
| 426 | return "", err |
| 427 | } |
| 428 | // Getcwd returns the number of bytes written to buf, including the NUL. |
| 429 | if n < 1 || n > len(buf) || buf[n-1] != 0 { |
| 430 | return "", EINVAL |
| 431 | } |
| 432 | return string(buf[0 : n-1]), nil |
| 433 | } |
| 434 | |
| 435 | func Getgroups() (gids []int, err error) { |
| 436 | n, err := getgroups(0, nil) |
| 437 | if err != nil { |
| 438 | return nil, err |
| 439 | } |
| 440 | if n == 0 { |
| 441 | return nil, nil |
| 442 | } |
| 443 | |
| 444 | // Sanity check group count. Max is 1<<16 on Linux. |
| 445 | if n < 0 || n > 1<<20 { |
| 446 | return nil, EINVAL |
| 447 | } |
| 448 | |
| 449 | a := make([]_Gid_t, n) |
| 450 | n, err = getgroups(n, &a[0]) |
| 451 | if err != nil { |
| 452 | return nil, err |
| 453 | } |
| 454 | gids = make([]int, n) |
| 455 | for i, v := range a[0:n] { |
| 456 | gids[i] = int(v) |
| 457 | } |
| 458 | return |
| 459 | } |
| 460 | |
| 461 | func Setgroups(gids []int) (err error) { |
| 462 | if len(gids) == 0 { |
| 463 | return setgroups(0, nil) |
| 464 | } |
| 465 | |
| 466 | a := make([]_Gid_t, len(gids)) |
| 467 | for i, v := range gids { |
| 468 | a[i] = _Gid_t(v) |
| 469 | } |
| 470 | return setgroups(len(a), &a[0]) |
| 471 | } |
| 472 | |
| 473 | func gettid() uint64 |
| 474 | |
| 475 | func Gettid() (tid int) { |
| 476 | return int(gettid()) |
| 477 | } |
| 478 | |
| 479 | type WaitStatus uint32 |
| 480 | |
| 481 | // Wait status is 7 bits at bottom, either 0 (exited), |
| 482 | // 0x7F (stopped), or a signal number that caused an exit. |
| 483 | // The 0x80 bit is whether there was a core dump. |
| 484 | // An extra number (exit code, signal causing a stop) |
| 485 | // is in the high bits. At least that's the idea. |
| 486 | // There are various irregularities. For example, the |
| 487 | // "continued" status is 0xFFFF, distinguishing itself |
| 488 | // from stopped via the core dump bit. |
| 489 | |
| 490 | const ( |
| 491 | mask = 0x7F |
| 492 | core = 0x80 |
| 493 | exited = 0x00 |
| 494 | stopped = 0x7F |
| 495 | shift = 8 |
| 496 | ) |
| 497 | |
| 498 | func (w WaitStatus) Exited() bool { return w&mask == exited } |
| 499 | |
| 500 | func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != exited } |
| 501 | |
| 502 | func (w WaitStatus) Stopped() bool { return w&0xFF == stopped } |
| 503 | |
| 504 | func (w WaitStatus) Continued() bool { return w == 0xFFFF } |
| 505 | |
| 506 | func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 } |
| 507 | |
| 508 | func (w WaitStatus) ExitStatus() int { |
| 509 | if !w.Exited() { |
| 510 | return -1 |
| 511 | } |
| 512 | return int(w>>shift) & 0xFF |
| 513 | } |
| 514 | |
| 515 | func (w WaitStatus) Signal() Signal { |
| 516 | if !w.Signaled() { |
| 517 | return -1 |
| 518 | } |
| 519 | return Signal(w & mask) |
| 520 | } |
| 521 | |
| 522 | func (w WaitStatus) StopSignal() Signal { |
| 523 | if !w.Stopped() { |
| 524 | return -1 |
| 525 | } |
| 526 | return Signal(w>>shift) & 0xFF |
| 527 | } |
| 528 | |
| 529 | func (w WaitStatus) TrapCause() int { return -1 } |
| 530 | |
| 531 | //sys waitpid(pid int, wstatus *_C_int, options int) (wpid int, err error) |
| 532 | |
| 533 | func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) { |
| 534 | // TODO(mundaym): z/OS doesn't have wait4. I don't think getrusage does what we want. |
| 535 | // At the moment rusage will not be touched. |
| 536 | var status _C_int |
| 537 | wpid, err = waitpid(pid, &status, options) |
| 538 | if wstatus != nil { |
| 539 | *wstatus = WaitStatus(status) |
| 540 | } |
| 541 | return |
| 542 | } |
| 543 | |
| 544 | //sysnb gettimeofday(tv *timeval_zos) (err error) |
| 545 | |
| 546 | func Gettimeofday(tv *Timeval) (err error) { |
| 547 | var tvz timeval_zos |
| 548 | err = gettimeofday(&tvz) |
| 549 | tv.Sec = tvz.Sec |
| 550 | tv.Usec = int64(tvz.Usec) |
| 551 | return |
| 552 | } |
| 553 | |
| 554 | func Time(t *Time_t) (tt Time_t, err error) { |
| 555 | var tv Timeval |
| 556 | err = Gettimeofday(&tv) |
| 557 | if err != nil { |
| 558 | return 0, err |
| 559 | } |
| 560 | if t != nil { |
| 561 | *t = Time_t(tv.Sec) |
| 562 | } |
| 563 | return Time_t(tv.Sec), nil |
| 564 | } |
| 565 | |
| 566 | func setTimespec(sec, nsec int64) Timespec { |
| 567 | return Timespec{Sec: sec, Nsec: nsec} |
| 568 | } |
| 569 | |
| 570 | func setTimeval(sec, usec int64) Timeval { //fix |
| 571 | return Timeval{Sec: sec, Usec: usec} |
| 572 | } |
| 573 | |
| 574 | //sysnb pipe(p *[2]_C_int) (err error) |
| 575 | |
| 576 | func Pipe(p []int) (err error) { |
| 577 | if len(p) != 2 { |
| 578 | return EINVAL |
| 579 | } |
| 580 | var pp [2]_C_int |
| 581 | err = pipe(&pp) |
| 582 | if err == nil { |
| 583 | p[0] = int(pp[0]) |
| 584 | p[1] = int(pp[1]) |
| 585 | } |
| 586 | return |
| 587 | } |
| 588 | |
| 589 | //sys utimes(path string, timeval *[2]Timeval) (err error) = SYS___UTIMES_A |
| 590 | |
| 591 | func Utimes(path string, tv []Timeval) (err error) { |
| 592 | if len(tv) != 2 { |
| 593 | return EINVAL |
| 594 | } |
| 595 | return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
| 596 | } |
| 597 | |
| 598 | func UtimesNano(path string, ts []Timespec) error { |
| 599 | if len(ts) != 2 { |
| 600 | return EINVAL |
| 601 | } |
| 602 | // Not as efficient as it could be because Timespec and |
| 603 | // Timeval have different types in the different OSes |
| 604 | tv := [2]Timeval{ |
| 605 | NsecToTimeval(TimespecToNsec(ts[0])), |
| 606 | NsecToTimeval(TimespecToNsec(ts[1])), |
| 607 | } |
| 608 | return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
| 609 | } |
| 610 | |
| 611 | func Getsockname(fd int) (sa Sockaddr, err error) { |
| 612 | var rsa RawSockaddrAny |
| 613 | var len _Socklen = SizeofSockaddrAny |
| 614 | if err = getsockname(fd, &rsa, &len); err != nil { |
| 615 | return |
| 616 | } |
| 617 | // TODO(neeilan) : Remove this 0 ( added to get sys/unix compiling on z/OS ) |
| 618 | return anyToSockaddr(0, &rsa) |
| 619 | } |
| 620 | |
| 621 | const ( |
| 622 | // identifier constants |
| 623 | nwmHeaderIdentifier = 0xd5e6d4c8 |
| 624 | nwmFilterIdentifier = 0xd5e6d4c6 |
| 625 | nwmTCPConnIdentifier = 0xd5e6d4c3 |
| 626 | nwmRecHeaderIdentifier = 0xd5e6d4d9 |
| 627 | nwmIPStatsIdentifier = 0xd5e6d4c9d7e2e340 |
| 628 | nwmIPGStatsIdentifier = 0xd5e6d4c9d7c7e2e3 |
| 629 | nwmTCPStatsIdentifier = 0xd5e6d4e3c3d7e2e3 |
| 630 | nwmUDPStatsIdentifier = 0xd5e6d4e4c4d7e2e3 |
| 631 | nwmICMPGStatsEntry = 0xd5e6d4c9c3d4d7c7 |
| 632 | nwmICMPTStatsEntry = 0xd5e6d4c9c3d4d7e3 |
| 633 | |
| 634 | // nwmHeader constants |
| 635 | nwmVersion1 = 1 |
| 636 | nwmVersion2 = 2 |
| 637 | nwmCurrentVer = 2 |
| 638 | |
| 639 | nwmTCPConnType = 1 |
| 640 | nwmGlobalStatsType = 14 |
| 641 | |
| 642 | // nwmFilter constants |
| 643 | nwmFilterLclAddrMask = 0x20000000 // Local address |
| 644 | nwmFilterSrcAddrMask = 0x20000000 // Source address |
| 645 | nwmFilterLclPortMask = 0x10000000 // Local port |
| 646 | nwmFilterSrcPortMask = 0x10000000 // Source port |
| 647 | |
| 648 | // nwmConnEntry constants |
| 649 | nwmTCPStateClosed = 1 |
| 650 | nwmTCPStateListen = 2 |
| 651 | nwmTCPStateSynSent = 3 |
| 652 | nwmTCPStateSynRcvd = 4 |
| 653 | nwmTCPStateEstab = 5 |
| 654 | nwmTCPStateFinWait1 = 6 |
| 655 | nwmTCPStateFinWait2 = 7 |
| 656 | nwmTCPStateClosWait = 8 |
| 657 | nwmTCPStateLastAck = 9 |
| 658 | nwmTCPStateClosing = 10 |
| 659 | nwmTCPStateTimeWait = 11 |
| 660 | nwmTCPStateDeletTCB = 12 |
| 661 | |
| 662 | // Existing constants on linux |
| 663 | BPF_TCP_CLOSE = 1 |
| 664 | BPF_TCP_LISTEN = 2 |
| 665 | BPF_TCP_SYN_SENT = 3 |
| 666 | BPF_TCP_SYN_RECV = 4 |
| 667 | BPF_TCP_ESTABLISHED = 5 |
| 668 | BPF_TCP_FIN_WAIT1 = 6 |
| 669 | BPF_TCP_FIN_WAIT2 = 7 |
| 670 | BPF_TCP_CLOSE_WAIT = 8 |
| 671 | BPF_TCP_LAST_ACK = 9 |
| 672 | BPF_TCP_CLOSING = 10 |
| 673 | BPF_TCP_TIME_WAIT = 11 |
| 674 | BPF_TCP_NEW_SYN_RECV = -1 |
| 675 | BPF_TCP_MAX_STATES = -2 |
| 676 | ) |
| 677 | |
| 678 | type nwmTriplet struct { |
| 679 | offset uint32 |
| 680 | length uint32 |
| 681 | number uint32 |
| 682 | } |
| 683 | |
| 684 | type nwmQuadruplet struct { |
| 685 | offset uint32 |
| 686 | length uint32 |
| 687 | number uint32 |
| 688 | match uint32 |
| 689 | } |
| 690 | |
| 691 | type nwmHeader struct { |
| 692 | ident uint32 |
| 693 | length uint32 |
| 694 | version uint16 |
| 695 | nwmType uint16 |
| 696 | bytesNeeded uint32 |
| 697 | options uint32 |
| 698 | _ [16]byte |
| 699 | inputDesc nwmTriplet |
| 700 | outputDesc nwmQuadruplet |
| 701 | } |
| 702 | |
| 703 | type nwmFilter struct { |
| 704 | ident uint32 |
| 705 | flags uint32 |
| 706 | resourceName [8]byte |
| 707 | resourceId uint32 |
| 708 | listenerId uint32 |
| 709 | local [28]byte // union of sockaddr4 and sockaddr6 |
| 710 | remote [28]byte // union of sockaddr4 and sockaddr6 |
| 711 | _ uint16 |
| 712 | _ uint16 |
| 713 | asid uint16 |
| 714 | _ [2]byte |
| 715 | tnLuName [8]byte |
| 716 | tnMonGrp uint32 |
| 717 | tnAppl [8]byte |
| 718 | applData [40]byte |
| 719 | nInterface [16]byte |
| 720 | dVipa [16]byte |
| 721 | dVipaPfx uint16 |
| 722 | dVipaPort uint16 |
| 723 | dVipaFamily byte |
| 724 | _ [3]byte |
| 725 | destXCF [16]byte |
| 726 | destXCFPfx uint16 |
| 727 | destXCFFamily byte |
| 728 | _ [1]byte |
| 729 | targIP [16]byte |
| 730 | targIPPfx uint16 |
| 731 | targIPFamily byte |
| 732 | _ [1]byte |
| 733 | _ [20]byte |
| 734 | } |
| 735 | |
| 736 | type nwmRecHeader struct { |
| 737 | ident uint32 |
| 738 | length uint32 |
| 739 | number byte |
| 740 | _ [3]byte |
| 741 | } |
| 742 | |
| 743 | type nwmTCPStatsEntry struct { |
| 744 | ident uint64 |
| 745 | currEstab uint32 |
| 746 | activeOpened uint32 |
| 747 | passiveOpened uint32 |
| 748 | connClosed uint32 |
| 749 | estabResets uint32 |
| 750 | attemptFails uint32 |
| 751 | passiveDrops uint32 |
| 752 | timeWaitReused uint32 |
| 753 | inSegs uint64 |
| 754 | predictAck uint32 |
| 755 | predictData uint32 |
| 756 | inDupAck uint32 |
| 757 | inBadSum uint32 |
| 758 | inBadLen uint32 |
| 759 | inShort uint32 |
| 760 | inDiscOldTime uint32 |
| 761 | inAllBeforeWin uint32 |
| 762 | inSomeBeforeWin uint32 |
| 763 | inAllAfterWin uint32 |
| 764 | inSomeAfterWin uint32 |
| 765 | inOutOfOrder uint32 |
| 766 | inAfterClose uint32 |
| 767 | inWinProbes uint32 |
| 768 | inWinUpdates uint32 |
| 769 | outWinUpdates uint32 |
| 770 | outSegs uint64 |
| 771 | outDelayAcks uint32 |
| 772 | outRsts uint32 |
| 773 | retransSegs uint32 |
| 774 | retransTimeouts uint32 |
| 775 | retransDrops uint32 |
| 776 | pmtuRetrans uint32 |
| 777 | pmtuErrors uint32 |
| 778 | outWinProbes uint32 |
| 779 | probeDrops uint32 |
| 780 | keepAliveProbes uint32 |
| 781 | keepAliveDrops uint32 |
| 782 | finwait2Drops uint32 |
| 783 | acceptCount uint64 |
| 784 | inBulkQSegs uint64 |
| 785 | inDiscards uint64 |
| 786 | connFloods uint32 |
| 787 | connStalls uint32 |
| 788 | cfgEphemDef uint16 |
| 789 | ephemInUse uint16 |
| 790 | ephemHiWater uint16 |
| 791 | flags byte |
| 792 | _ [1]byte |
| 793 | ephemExhaust uint32 |
| 794 | smcRCurrEstabLnks uint32 |
| 795 | smcRLnkActTimeOut uint32 |
| 796 | smcRActLnkOpened uint32 |
| 797 | smcRPasLnkOpened uint32 |
| 798 | smcRLnksClosed uint32 |
| 799 | smcRCurrEstab uint32 |
| 800 | smcRActiveOpened uint32 |
| 801 | smcRPassiveOpened uint32 |
| 802 | smcRConnClosed uint32 |
| 803 | smcRInSegs uint64 |
| 804 | smcROutSegs uint64 |
| 805 | smcRInRsts uint32 |
| 806 | smcROutRsts uint32 |
| 807 | smcDCurrEstabLnks uint32 |
| 808 | smcDActLnkOpened uint32 |
| 809 | smcDPasLnkOpened uint32 |
| 810 | smcDLnksClosed uint32 |
| 811 | smcDCurrEstab uint32 |
| 812 | smcDActiveOpened uint32 |
| 813 | smcDPassiveOpened uint32 |
| 814 | smcDConnClosed uint32 |
| 815 | smcDInSegs uint64 |
| 816 | smcDOutSegs uint64 |
| 817 | smcDInRsts uint32 |
| 818 | smcDOutRsts uint32 |
| 819 | } |
| 820 | |
| 821 | type nwmConnEntry struct { |
| 822 | ident uint32 |
| 823 | local [28]byte // union of sockaddr4 and sockaddr6 |
| 824 | remote [28]byte // union of sockaddr4 and sockaddr6 |
| 825 | startTime [8]byte // uint64, changed to prevent padding from being inserted |
| 826 | lastActivity [8]byte // uint64 |
| 827 | bytesIn [8]byte // uint64 |
| 828 | bytesOut [8]byte // uint64 |
| 829 | inSegs [8]byte // uint64 |
| 830 | outSegs [8]byte // uint64 |
| 831 | state uint16 |
| 832 | activeOpen byte |
| 833 | flag01 byte |
| 834 | outBuffered uint32 |
| 835 | inBuffered uint32 |
| 836 | maxSndWnd uint32 |
| 837 | reXmtCount uint32 |
| 838 | congestionWnd uint32 |
| 839 | ssThresh uint32 |
| 840 | roundTripTime uint32 |
| 841 | roundTripVar uint32 |
| 842 | sendMSS uint32 |
| 843 | sndWnd uint32 |
| 844 | rcvBufSize uint32 |
| 845 | sndBufSize uint32 |
| 846 | outOfOrderCount uint32 |
| 847 | lcl0WindowCount uint32 |
| 848 | rmt0WindowCount uint32 |
| 849 | dupacks uint32 |
| 850 | flag02 byte |
| 851 | sockOpt6Cont byte |
| 852 | asid uint16 |
| 853 | resourceName [8]byte |
| 854 | resourceId uint32 |
| 855 | subtask uint32 |
| 856 | sockOpt byte |
| 857 | sockOpt6 byte |
| 858 | clusterConnFlag byte |
| 859 | proto byte |
| 860 | targetAppl [8]byte |
| 861 | luName [8]byte |
| 862 | clientUserId [8]byte |
| 863 | logMode [8]byte |
| 864 | timeStamp uint32 |
| 865 | timeStampAge uint32 |
| 866 | serverResourceId uint32 |
| 867 | intfName [16]byte |
| 868 | ttlsStatPol byte |
| 869 | ttlsStatConn byte |
| 870 | ttlsSSLProt uint16 |
| 871 | ttlsNegCiph [2]byte |
| 872 | ttlsSecType byte |
| 873 | ttlsFIPS140Mode byte |
| 874 | ttlsUserID [8]byte |
| 875 | applData [40]byte |
| 876 | inOldestTime [8]byte // uint64 |
| 877 | outOldestTime [8]byte // uint64 |
| 878 | tcpTrustedPartner byte |
| 879 | _ [3]byte |
| 880 | bulkDataIntfName [16]byte |
| 881 | ttlsNegCiph4 [4]byte |
| 882 | smcReason uint32 |
| 883 | lclSMCLinkId uint32 |
| 884 | rmtSMCLinkId uint32 |
| 885 | smcStatus byte |
| 886 | smcFlags byte |
| 887 | _ [2]byte |
| 888 | rcvWnd uint32 |
| 889 | lclSMCBufSz uint32 |
| 890 | rmtSMCBufSz uint32 |
| 891 | ttlsSessID [32]byte |
| 892 | ttlsSessIDLen int16 |
| 893 | _ [1]byte |
| 894 | smcDStatus byte |
| 895 | smcDReason uint32 |
| 896 | } |
| 897 | |
| 898 | var svcNameTable [][]byte = [][]byte{ |
| 899 | []byte("\xc5\xe9\xc2\xd5\xd4\xc9\xc6\xf4"), // svc_EZBNMIF4 |
| 900 | } |
| 901 | |
| 902 | const ( |
| 903 | svc_EZBNMIF4 = 0 |
| 904 | ) |
| 905 | |
| 906 | func GetsockoptTCPInfo(fd, level, opt int) (*TCPInfo, error) { |
| 907 | jobname := []byte("\x5c\x40\x40\x40\x40\x40\x40\x40") // "*" |
| 908 | responseBuffer := [4096]byte{0} |
| 909 | var bufferAlet, reasonCode uint32 = 0, 0 |
| 910 | var bufferLen, returnValue, returnCode int32 = 4096, 0, 0 |
| 911 | |
| 912 | dsa := [18]uint64{0} |
| 913 | var argv [7]unsafe.Pointer |
| 914 | argv[0] = unsafe.Pointer(&jobname[0]) |
| 915 | argv[1] = unsafe.Pointer(&responseBuffer[0]) |
| 916 | argv[2] = unsafe.Pointer(&bufferAlet) |
| 917 | argv[3] = unsafe.Pointer(&bufferLen) |
| 918 | argv[4] = unsafe.Pointer(&returnValue) |
| 919 | argv[5] = unsafe.Pointer(&returnCode) |
| 920 | argv[6] = unsafe.Pointer(&reasonCode) |
| 921 | |
| 922 | request := (*struct { |
| 923 | header nwmHeader |
| 924 | filter nwmFilter |
| 925 | })(unsafe.Pointer(&responseBuffer[0])) |
| 926 | |
| 927 | EZBNMIF4 := svcLoad(&svcNameTable[svc_EZBNMIF4][0]) |
| 928 | if EZBNMIF4 == nil { |
| 929 | return nil, errnoErr(EINVAL) |
| 930 | } |
| 931 | |
| 932 | // GetGlobalStats EZBNMIF4 call |
| 933 | request.header.ident = nwmHeaderIdentifier |
| 934 | request.header.length = uint32(unsafe.Sizeof(request.header)) |
| 935 | request.header.version = nwmCurrentVer |
| 936 | request.header.nwmType = nwmGlobalStatsType |
| 937 | request.header.options = 0x80000000 |
| 938 | |
| 939 | svcCall(EZBNMIF4, &argv[0], &dsa[0]) |
| 940 | |
| 941 | // outputDesc field is filled by EZBNMIF4 on success |
| 942 | if returnCode != 0 || request.header.outputDesc.offset == 0 { |
| 943 | return nil, errnoErr(EINVAL) |
| 944 | } |
| 945 | |
| 946 | // Check that EZBNMIF4 returned a nwmRecHeader |
| 947 | recHeader := (*nwmRecHeader)(unsafe.Pointer(&responseBuffer[request.header.outputDesc.offset])) |
| 948 | if recHeader.ident != nwmRecHeaderIdentifier { |
| 949 | return nil, errnoErr(EINVAL) |
| 950 | } |
| 951 | |
| 952 | // Parse nwmTriplets to get offsets of returned entries |
| 953 | var sections []*uint64 |
| 954 | var sectionDesc *nwmTriplet = (*nwmTriplet)(unsafe.Pointer(&responseBuffer[0])) |
| 955 | for i := uint32(0); i < uint32(recHeader.number); i++ { |
| 956 | offset := request.header.outputDesc.offset + uint32(unsafe.Sizeof(*recHeader)) + i*uint32(unsafe.Sizeof(*sectionDesc)) |
| 957 | sectionDesc = (*nwmTriplet)(unsafe.Pointer(&responseBuffer[offset])) |
| 958 | for j := uint32(0); j < sectionDesc.number; j++ { |
| 959 | offset = request.header.outputDesc.offset + sectionDesc.offset + j*sectionDesc.length |
| 960 | sections = append(sections, (*uint64)(unsafe.Pointer(&responseBuffer[offset]))) |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | // Find nwmTCPStatsEntry in returned entries |
| 965 | var tcpStats *nwmTCPStatsEntry = nil |
| 966 | for _, ptr := range sections { |
| 967 | switch *ptr { |
| 968 | case nwmTCPStatsIdentifier: |
| 969 | if tcpStats != nil { |
| 970 | return nil, errnoErr(EINVAL) |
| 971 | } |
| 972 | tcpStats = (*nwmTCPStatsEntry)(unsafe.Pointer(ptr)) |
| 973 | case nwmIPStatsIdentifier: |
| 974 | case nwmIPGStatsIdentifier: |
| 975 | case nwmUDPStatsIdentifier: |
| 976 | case nwmICMPGStatsEntry: |
| 977 | case nwmICMPTStatsEntry: |
| 978 | default: |
| 979 | return nil, errnoErr(EINVAL) |
| 980 | } |
| 981 | } |
| 982 | if tcpStats == nil { |
| 983 | return nil, errnoErr(EINVAL) |
| 984 | } |
| 985 | |
| 986 | // GetConnectionDetail EZBNMIF4 call |
| 987 | responseBuffer = [4096]byte{0} |
| 988 | dsa = [18]uint64{0} |
| 989 | bufferAlet, reasonCode = 0, 0 |
| 990 | bufferLen, returnValue, returnCode = 4096, 0, 0 |
| 991 | nameptr := (*uint32)(unsafe.Pointer(uintptr(0x21c))) // Get jobname of current process |
| 992 | nameptr = (*uint32)(unsafe.Pointer(uintptr(*nameptr + 12))) |
| 993 | argv[0] = unsafe.Pointer(uintptr(*nameptr)) |
| 994 | |
| 995 | request.header.ident = nwmHeaderIdentifier |
| 996 | request.header.length = uint32(unsafe.Sizeof(request.header)) |
| 997 | request.header.version = nwmCurrentVer |
| 998 | request.header.nwmType = nwmTCPConnType |
| 999 | request.header.options = 0x80000000 |
| 1000 | |
| 1001 | request.filter.ident = nwmFilterIdentifier |
| 1002 | |
| 1003 | var localSockaddr RawSockaddrAny |
| 1004 | socklen := _Socklen(SizeofSockaddrAny) |
| 1005 | err := getsockname(fd, &localSockaddr, &socklen) |
| 1006 | if err != nil { |
| 1007 | return nil, errnoErr(EINVAL) |
| 1008 | } |
| 1009 | if localSockaddr.Addr.Family == AF_INET { |
| 1010 | localSockaddr := (*RawSockaddrInet4)(unsafe.Pointer(&localSockaddr.Addr)) |
| 1011 | localSockFilter := (*RawSockaddrInet4)(unsafe.Pointer(&request.filter.local[0])) |
| 1012 | localSockFilter.Family = AF_INET |
| 1013 | var i int |
| 1014 | for i = 0; i < 4; i++ { |
| 1015 | if localSockaddr.Addr[i] != 0 { |
| 1016 | break |
| 1017 | } |
| 1018 | } |
| 1019 | if i != 4 { |
| 1020 | request.filter.flags |= nwmFilterLclAddrMask |
| 1021 | for i = 0; i < 4; i++ { |
| 1022 | localSockFilter.Addr[i] = localSockaddr.Addr[i] |
| 1023 | } |
| 1024 | } |
| 1025 | if localSockaddr.Port != 0 { |
| 1026 | request.filter.flags |= nwmFilterLclPortMask |
| 1027 | localSockFilter.Port = localSockaddr.Port |
| 1028 | } |
| 1029 | } else if localSockaddr.Addr.Family == AF_INET6 { |
| 1030 | localSockaddr := (*RawSockaddrInet6)(unsafe.Pointer(&localSockaddr.Addr)) |
| 1031 | localSockFilter := (*RawSockaddrInet6)(unsafe.Pointer(&request.filter.local[0])) |
| 1032 | localSockFilter.Family = AF_INET6 |
| 1033 | var i int |
| 1034 | for i = 0; i < 16; i++ { |
| 1035 | if localSockaddr.Addr[i] != 0 { |
| 1036 | break |
| 1037 | } |
| 1038 | } |
| 1039 | if i != 16 { |
| 1040 | request.filter.flags |= nwmFilterLclAddrMask |
| 1041 | for i = 0; i < 16; i++ { |
| 1042 | localSockFilter.Addr[i] = localSockaddr.Addr[i] |
| 1043 | } |
| 1044 | } |
| 1045 | if localSockaddr.Port != 0 { |
| 1046 | request.filter.flags |= nwmFilterLclPortMask |
| 1047 | localSockFilter.Port = localSockaddr.Port |
| 1048 | } |
| 1049 | } |
| 1050 | |
| 1051 | svcCall(EZBNMIF4, &argv[0], &dsa[0]) |
| 1052 | |
| 1053 | // outputDesc field is filled by EZBNMIF4 on success |
| 1054 | if returnCode != 0 || request.header.outputDesc.offset == 0 { |
| 1055 | return nil, errnoErr(EINVAL) |
| 1056 | } |
| 1057 | |
| 1058 | // Check that EZBNMIF4 returned a nwmConnEntry |
| 1059 | conn := (*nwmConnEntry)(unsafe.Pointer(&responseBuffer[request.header.outputDesc.offset])) |
| 1060 | if conn.ident != nwmTCPConnIdentifier { |
| 1061 | return nil, errnoErr(EINVAL) |
| 1062 | } |
| 1063 | |
| 1064 | // Copy data from the returned data structures into tcpInfo |
| 1065 | // Stats from nwmConnEntry are specific to that connection. |
| 1066 | // Stats from nwmTCPStatsEntry are global (to the interface?) |
| 1067 | // Fields may not be an exact match. Some fields have no equivalent. |
| 1068 | var tcpinfo TCPInfo |
| 1069 | tcpinfo.State = uint8(conn.state) |
| 1070 | tcpinfo.Ca_state = 0 // dummy |
| 1071 | tcpinfo.Retransmits = uint8(tcpStats.retransSegs) |
| 1072 | tcpinfo.Probes = uint8(tcpStats.outWinProbes) |
| 1073 | tcpinfo.Backoff = 0 // dummy |
| 1074 | tcpinfo.Options = 0 // dummy |
| 1075 | tcpinfo.Rto = tcpStats.retransTimeouts |
| 1076 | tcpinfo.Ato = tcpStats.outDelayAcks |
| 1077 | tcpinfo.Snd_mss = conn.sendMSS |
| 1078 | tcpinfo.Rcv_mss = conn.sendMSS // dummy |
| 1079 | tcpinfo.Unacked = 0 // dummy |
| 1080 | tcpinfo.Sacked = 0 // dummy |
| 1081 | tcpinfo.Lost = 0 // dummy |
| 1082 | tcpinfo.Retrans = conn.reXmtCount |
| 1083 | tcpinfo.Fackets = 0 // dummy |
| 1084 | tcpinfo.Last_data_sent = uint32(*(*uint64)(unsafe.Pointer(&conn.lastActivity[0]))) |
| 1085 | tcpinfo.Last_ack_sent = uint32(*(*uint64)(unsafe.Pointer(&conn.outOldestTime[0]))) |
| 1086 | tcpinfo.Last_data_recv = uint32(*(*uint64)(unsafe.Pointer(&conn.inOldestTime[0]))) |
| 1087 | tcpinfo.Last_ack_recv = uint32(*(*uint64)(unsafe.Pointer(&conn.inOldestTime[0]))) |
| 1088 | tcpinfo.Pmtu = conn.sendMSS // dummy, NWMIfRouteMtu is a candidate |
| 1089 | tcpinfo.Rcv_ssthresh = conn.ssThresh |
| 1090 | tcpinfo.Rtt = conn.roundTripTime |
| 1091 | tcpinfo.Rttvar = conn.roundTripVar |
| 1092 | tcpinfo.Snd_ssthresh = conn.ssThresh // dummy |
| 1093 | tcpinfo.Snd_cwnd = conn.congestionWnd |
| 1094 | tcpinfo.Advmss = conn.sendMSS // dummy |
| 1095 | tcpinfo.Reordering = 0 // dummy |
| 1096 | tcpinfo.Rcv_rtt = conn.roundTripTime // dummy |
| 1097 | tcpinfo.Rcv_space = conn.sendMSS // dummy |
| 1098 | tcpinfo.Total_retrans = conn.reXmtCount |
| 1099 | |
| 1100 | svcUnload(&svcNameTable[svc_EZBNMIF4][0], EZBNMIF4) |
| 1101 | |
| 1102 | return &tcpinfo, nil |
| 1103 | } |
| 1104 | |
| 1105 | // GetsockoptString returns the string value of the socket option opt for the |
| 1106 | // socket associated with fd at the given socket level. |
| 1107 | func GetsockoptString(fd, level, opt int) (string, error) { |
| 1108 | buf := make([]byte, 256) |
| 1109 | vallen := _Socklen(len(buf)) |
| 1110 | err := getsockopt(fd, level, opt, unsafe.Pointer(&buf[0]), &vallen) |
| 1111 | if err != nil { |
| 1112 | return "", err |
| 1113 | } |
| 1114 | |
| 1115 | return string(buf[:vallen-1]), nil |
| 1116 | } |
| 1117 | |
| 1118 | func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { |
| 1119 | var msg Msghdr |
| 1120 | var rsa RawSockaddrAny |
| 1121 | msg.Name = (*byte)(unsafe.Pointer(&rsa)) |
| 1122 | msg.Namelen = SizeofSockaddrAny |
| 1123 | var iov Iovec |
| 1124 | if len(p) > 0 { |
| 1125 | iov.Base = (*byte)(unsafe.Pointer(&p[0])) |
| 1126 | iov.SetLen(len(p)) |
| 1127 | } |
| 1128 | var dummy byte |
| 1129 | if len(oob) > 0 { |
| 1130 | // receive at least one normal byte |
| 1131 | if len(p) == 0 { |
| 1132 | iov.Base = &dummy |
| 1133 | iov.SetLen(1) |
| 1134 | } |
| 1135 | msg.Control = (*byte)(unsafe.Pointer(&oob[0])) |
| 1136 | msg.SetControllen(len(oob)) |
| 1137 | } |
| 1138 | msg.Iov = &iov |
| 1139 | msg.Iovlen = 1 |
| 1140 | if n, err = recvmsg(fd, &msg, flags); err != nil { |
| 1141 | return |
| 1142 | } |
| 1143 | oobn = int(msg.Controllen) |
| 1144 | recvflags = int(msg.Flags) |
| 1145 | // source address is only specified if the socket is unconnected |
| 1146 | if rsa.Addr.Family != AF_UNSPEC { |
| 1147 | // TODO(neeilan): Remove 0 arg added to get this compiling on z/OS |
| 1148 | from, err = anyToSockaddr(0, &rsa) |
| 1149 | } |
| 1150 | return |
| 1151 | } |
| 1152 | |
| 1153 | func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { |
| 1154 | _, err = SendmsgN(fd, p, oob, to, flags) |
| 1155 | return |
| 1156 | } |
| 1157 | |
| 1158 | func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { |
| 1159 | var ptr unsafe.Pointer |
| 1160 | var salen _Socklen |
| 1161 | if to != nil { |
| 1162 | var err error |
| 1163 | ptr, salen, err = to.sockaddr() |
| 1164 | if err != nil { |
| 1165 | return 0, err |
| 1166 | } |
| 1167 | } |
| 1168 | var msg Msghdr |
| 1169 | msg.Name = (*byte)(unsafe.Pointer(ptr)) |
| 1170 | msg.Namelen = int32(salen) |
| 1171 | var iov Iovec |
| 1172 | if len(p) > 0 { |
| 1173 | iov.Base = (*byte)(unsafe.Pointer(&p[0])) |
| 1174 | iov.SetLen(len(p)) |
| 1175 | } |
| 1176 | var dummy byte |
| 1177 | if len(oob) > 0 { |
| 1178 | // send at least one normal byte |
| 1179 | if len(p) == 0 { |
| 1180 | iov.Base = &dummy |
| 1181 | iov.SetLen(1) |
| 1182 | } |
| 1183 | msg.Control = (*byte)(unsafe.Pointer(&oob[0])) |
| 1184 | msg.SetControllen(len(oob)) |
| 1185 | } |
| 1186 | msg.Iov = &iov |
| 1187 | msg.Iovlen = 1 |
| 1188 | if n, err = sendmsg(fd, &msg, flags); err != nil { |
| 1189 | return 0, err |
| 1190 | } |
| 1191 | if len(oob) > 0 && len(p) == 0 { |
| 1192 | n = 0 |
| 1193 | } |
| 1194 | return n, nil |
| 1195 | } |
| 1196 | |
| 1197 | func Opendir(name string) (uintptr, error) { |
| 1198 | p, err := BytePtrFromString(name) |
| 1199 | if err != nil { |
| 1200 | return 0, err |
| 1201 | } |
| 1202 | dir, _, e := syscall_syscall(SYS___OPENDIR_A, uintptr(unsafe.Pointer(p)), 0, 0) |
| 1203 | runtime.KeepAlive(unsafe.Pointer(p)) |
| 1204 | if e != 0 { |
| 1205 | err = errnoErr(e) |
| 1206 | } |
| 1207 | return dir, err |
| 1208 | } |
| 1209 | |
| 1210 | // clearsyscall.Errno resets the errno value to 0. |
| 1211 | func clearErrno() |
| 1212 | |
| 1213 | func Readdir(dir uintptr) (*Dirent, error) { |
| 1214 | var ent Dirent |
| 1215 | var res uintptr |
| 1216 | // __readdir_r_a returns errno at the end of the directory stream, rather than 0. |
| 1217 | // Therefore to avoid false positives we clear errno before calling it. |
| 1218 | |
| 1219 | // TODO(neeilan): Commented this out to get sys/unix compiling on z/OS. Uncomment and fix. Error: "undefined: clearsyscall" |
| 1220 | //clearsyscall.Errno() // TODO(mundaym): check pre-emption rules. |
| 1221 | |
| 1222 | e, _, _ := syscall_syscall(SYS___READDIR_R_A, dir, uintptr(unsafe.Pointer(&ent)), uintptr(unsafe.Pointer(&res))) |
| 1223 | var err error |
| 1224 | if e != 0 { |
| 1225 | err = errnoErr(Errno(e)) |
| 1226 | } |
| 1227 | if res == 0 { |
| 1228 | return nil, err |
| 1229 | } |
| 1230 | return &ent, err |
| 1231 | } |
| 1232 | |
| 1233 | func Closedir(dir uintptr) error { |
| 1234 | _, _, e := syscall_syscall(SYS_CLOSEDIR, dir, 0, 0) |
| 1235 | if e != 0 { |
| 1236 | return errnoErr(e) |
| 1237 | } |
| 1238 | return nil |
| 1239 | } |
| 1240 | |
| 1241 | func Seekdir(dir uintptr, pos int) { |
| 1242 | _, _, _ = syscall_syscall(SYS_SEEKDIR, dir, uintptr(pos), 0) |
| 1243 | } |
| 1244 | |
| 1245 | func Telldir(dir uintptr) (int, error) { |
| 1246 | p, _, e := syscall_syscall(SYS_TELLDIR, dir, 0, 0) |
| 1247 | pos := int(p) |
| 1248 | if pos == -1 { |
| 1249 | return pos, errnoErr(e) |
| 1250 | } |
| 1251 | return pos, nil |
| 1252 | } |
| 1253 | |
| 1254 | // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command. |
| 1255 | func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error { |
| 1256 | // struct flock is packed on z/OS. We can't emulate that in Go so |
| 1257 | // instead we pack it here. |
| 1258 | var flock [24]byte |
| 1259 | *(*int16)(unsafe.Pointer(&flock[0])) = lk.Type |
| 1260 | *(*int16)(unsafe.Pointer(&flock[2])) = lk.Whence |
| 1261 | *(*int64)(unsafe.Pointer(&flock[4])) = lk.Start |
| 1262 | *(*int64)(unsafe.Pointer(&flock[12])) = lk.Len |
| 1263 | *(*int32)(unsafe.Pointer(&flock[20])) = lk.Pid |
| 1264 | _, _, errno := syscall_syscall(SYS_FCNTL, fd, uintptr(cmd), uintptr(unsafe.Pointer(&flock))) |
| 1265 | lk.Type = *(*int16)(unsafe.Pointer(&flock[0])) |
| 1266 | lk.Whence = *(*int16)(unsafe.Pointer(&flock[2])) |
| 1267 | lk.Start = *(*int64)(unsafe.Pointer(&flock[4])) |
| 1268 | lk.Len = *(*int64)(unsafe.Pointer(&flock[12])) |
| 1269 | lk.Pid = *(*int32)(unsafe.Pointer(&flock[20])) |
| 1270 | if errno == 0 { |
| 1271 | return nil |
| 1272 | } |
| 1273 | return errno |
| 1274 | } |
| 1275 | |
| 1276 | func Flock(fd int, how int) error { |
| 1277 | |
| 1278 | var flock_type int16 |
| 1279 | var fcntl_cmd int |
| 1280 | |
| 1281 | switch how { |
| 1282 | case LOCK_SH | LOCK_NB: |
| 1283 | flock_type = F_RDLCK |
| 1284 | fcntl_cmd = F_SETLK |
| 1285 | case LOCK_EX | LOCK_NB: |
| 1286 | flock_type = F_WRLCK |
| 1287 | fcntl_cmd = F_SETLK |
| 1288 | case LOCK_EX: |
| 1289 | flock_type = F_WRLCK |
| 1290 | fcntl_cmd = F_SETLKW |
| 1291 | case LOCK_UN: |
| 1292 | flock_type = F_UNLCK |
| 1293 | fcntl_cmd = F_SETLKW |
| 1294 | default: |
| 1295 | } |
| 1296 | |
| 1297 | flock := Flock_t{ |
| 1298 | Type: int16(flock_type), |
| 1299 | Whence: int16(0), |
| 1300 | Start: int64(0), |
| 1301 | Len: int64(0), |
| 1302 | Pid: int32(Getppid()), |
| 1303 | } |
| 1304 | |
| 1305 | err := FcntlFlock(uintptr(fd), fcntl_cmd, &flock) |
| 1306 | return err |
| 1307 | } |
| 1308 | |
| 1309 | func Mlock(b []byte) (err error) { |
| 1310 | _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_NONSWAP, 0, 0) |
| 1311 | if e1 != 0 { |
| 1312 | err = errnoErr(e1) |
| 1313 | } |
| 1314 | return |
| 1315 | } |
| 1316 | |
| 1317 | func Mlock2(b []byte, flags int) (err error) { |
| 1318 | _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_NONSWAP, 0, 0) |
| 1319 | if e1 != 0 { |
| 1320 | err = errnoErr(e1) |
| 1321 | } |
| 1322 | return |
| 1323 | } |
| 1324 | |
| 1325 | func Mlockall(flags int) (err error) { |
| 1326 | _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_NONSWAP, 0, 0) |
| 1327 | if e1 != 0 { |
| 1328 | err = errnoErr(e1) |
| 1329 | } |
| 1330 | return |
| 1331 | } |
| 1332 | |
| 1333 | func Munlock(b []byte) (err error) { |
| 1334 | _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_SWAP, 0, 0) |
| 1335 | if e1 != 0 { |
| 1336 | err = errnoErr(e1) |
| 1337 | } |
| 1338 | return |
| 1339 | } |
| 1340 | |
| 1341 | func Munlockall() (err error) { |
| 1342 | _, _, e1 := syscall_syscall(SYS___MLOCKALL, _BPX_SWAP, 0, 0) |
| 1343 | if e1 != 0 { |
| 1344 | err = errnoErr(e1) |
| 1345 | } |
| 1346 | return |
| 1347 | } |
| 1348 | |
| 1349 | func ClockGettime(clockid int32, ts *Timespec) error { |
| 1350 | |
| 1351 | var ticks_per_sec uint32 = 100 //TODO(kenan): value is currently hardcoded; need sysconf() call otherwise |
| 1352 | var nsec_per_sec int64 = 1000000000 |
| 1353 | |
| 1354 | if ts == nil { |
| 1355 | return EFAULT |
| 1356 | } |
| 1357 | if clockid == CLOCK_REALTIME || clockid == CLOCK_MONOTONIC { |
| 1358 | var nanotime int64 = runtime.Nanotime1() |
| 1359 | ts.Sec = nanotime / nsec_per_sec |
| 1360 | ts.Nsec = nanotime % nsec_per_sec |
| 1361 | } else if clockid == CLOCK_PROCESS_CPUTIME_ID || clockid == CLOCK_THREAD_CPUTIME_ID { |
| 1362 | var tm Tms |
| 1363 | _, err := Times(&tm) |
| 1364 | if err != nil { |
| 1365 | return EFAULT |
| 1366 | } |
| 1367 | ts.Sec = int64(tm.Utime / ticks_per_sec) |
| 1368 | ts.Nsec = int64(tm.Utime) * nsec_per_sec / int64(ticks_per_sec) |
| 1369 | } else { |
| 1370 | return EINVAL |
| 1371 | } |
| 1372 | return nil |
| 1373 | } |
| 1374 | |
| 1375 | func Statfs(path string, stat *Statfs_t) (err error) { |
| 1376 | fd, err := open(path, O_RDONLY, 0) |
| 1377 | defer Close(fd) |
| 1378 | if err != nil { |
| 1379 | return err |
| 1380 | } |
| 1381 | return Fstatfs(fd, stat) |
| 1382 | } |
| 1383 | |
| 1384 | var ( |
| 1385 | Stdin = 0 |
| 1386 | Stdout = 1 |
| 1387 | Stderr = 2 |
| 1388 | ) |
| 1389 | |
| 1390 | // Do the interface allocations only once for common |
| 1391 | // Errno values. |
| 1392 | var ( |
| 1393 | errEAGAIN error = syscall.EAGAIN |
| 1394 | errEINVAL error = syscall.EINVAL |
| 1395 | errENOENT error = syscall.ENOENT |
| 1396 | ) |
| 1397 | |
| 1398 | var ( |
| 1399 | signalNameMapOnce sync.Once |
| 1400 | signalNameMap map[string]syscall.Signal |
| 1401 | ) |
| 1402 | |
| 1403 | // errnoErr returns common boxed Errno values, to prevent |
| 1404 | // allocations at runtime. |
| 1405 | func errnoErr(e Errno) error { |
| 1406 | switch e { |
| 1407 | case 0: |
| 1408 | return nil |
| 1409 | case EAGAIN: |
| 1410 | return errEAGAIN |
| 1411 | case EINVAL: |
| 1412 | return errEINVAL |
| 1413 | case ENOENT: |
| 1414 | return errENOENT |
| 1415 | } |
| 1416 | return e |
| 1417 | } |
| 1418 | |
| 1419 | // ErrnoName returns the error name for error number e. |
| 1420 | func ErrnoName(e Errno) string { |
| 1421 | i := sort.Search(len(errorList), func(i int) bool { |
| 1422 | return errorList[i].num >= e |
| 1423 | }) |
| 1424 | if i < len(errorList) && errorList[i].num == e { |
| 1425 | return errorList[i].name |
| 1426 | } |
| 1427 | return "" |
| 1428 | } |
| 1429 | |
| 1430 | // SignalName returns the signal name for signal number s. |
| 1431 | func SignalName(s syscall.Signal) string { |
| 1432 | i := sort.Search(len(signalList), func(i int) bool { |
| 1433 | return signalList[i].num >= s |
| 1434 | }) |
| 1435 | if i < len(signalList) && signalList[i].num == s { |
| 1436 | return signalList[i].name |
| 1437 | } |
| 1438 | return "" |
| 1439 | } |
| 1440 | |
| 1441 | // SignalNum returns the syscall.Signal for signal named s, |
| 1442 | // or 0 if a signal with such name is not found. |
| 1443 | // The signal name should start with "SIG". |
| 1444 | func SignalNum(s string) syscall.Signal { |
| 1445 | signalNameMapOnce.Do(func() { |
| 1446 | signalNameMap = make(map[string]syscall.Signal, len(signalList)) |
| 1447 | for _, signal := range signalList { |
| 1448 | signalNameMap[signal.name] = signal.num |
| 1449 | } |
| 1450 | }) |
| 1451 | return signalNameMap[s] |
| 1452 | } |
| 1453 | |
| 1454 | // clen returns the index of the first NULL byte in n or len(n) if n contains no NULL byte. |
| 1455 | func clen(n []byte) int { |
| 1456 | i := bytes.IndexByte(n, 0) |
| 1457 | if i == -1 { |
| 1458 | i = len(n) |
| 1459 | } |
| 1460 | return i |
| 1461 | } |
| 1462 | |
| 1463 | // Mmap manager, for use by operating system-specific implementations. |
| 1464 | |
| 1465 | type mmapper struct { |
| 1466 | sync.Mutex |
| 1467 | active map[*byte][]byte // active mappings; key is last byte in mapping |
| 1468 | mmap func(addr, length uintptr, prot, flags, fd int, offset int64) (uintptr, error) |
| 1469 | munmap func(addr uintptr, length uintptr) error |
| 1470 | } |
| 1471 | |
| 1472 | func (m *mmapper) Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { |
| 1473 | if length <= 0 { |
| 1474 | return nil, EINVAL |
| 1475 | } |
| 1476 | |
| 1477 | // Map the requested memory. |
| 1478 | addr, errno := m.mmap(0, uintptr(length), prot, flags, fd, offset) |
| 1479 | if errno != nil { |
| 1480 | return nil, errno |
| 1481 | } |
| 1482 | |
| 1483 | // Slice memory layout |
| 1484 | var sl = struct { |
| 1485 | addr uintptr |
| 1486 | len int |
| 1487 | cap int |
| 1488 | }{addr, length, length} |
| 1489 | |
| 1490 | // Use unsafe to turn sl into a []byte. |
| 1491 | b := *(*[]byte)(unsafe.Pointer(&sl)) |
| 1492 | |
| 1493 | // Register mapping in m and return it. |
| 1494 | p := &b[cap(b)-1] |
| 1495 | m.Lock() |
| 1496 | defer m.Unlock() |
| 1497 | m.active[p] = b |
| 1498 | return b, nil |
| 1499 | } |
| 1500 | |
| 1501 | func (m *mmapper) Munmap(data []byte) (err error) { |
| 1502 | if len(data) == 0 || len(data) != cap(data) { |
| 1503 | return EINVAL |
| 1504 | } |
| 1505 | |
| 1506 | // Find the base of the mapping. |
| 1507 | p := &data[cap(data)-1] |
| 1508 | m.Lock() |
| 1509 | defer m.Unlock() |
| 1510 | b := m.active[p] |
| 1511 | if b == nil || &b[0] != &data[0] { |
| 1512 | return EINVAL |
| 1513 | } |
| 1514 | |
| 1515 | // Unmap the memory and update m. |
| 1516 | if errno := m.munmap(uintptr(unsafe.Pointer(&b[0])), uintptr(len(b))); errno != nil { |
| 1517 | return errno |
| 1518 | } |
| 1519 | delete(m.active, p) |
| 1520 | return nil |
| 1521 | } |
| 1522 | |
| 1523 | func Read(fd int, p []byte) (n int, err error) { |
| 1524 | n, err = read(fd, p) |
| 1525 | if raceenabled { |
| 1526 | if n > 0 { |
| 1527 | raceWriteRange(unsafe.Pointer(&p[0]), n) |
| 1528 | } |
| 1529 | if err == nil { |
| 1530 | raceAcquire(unsafe.Pointer(&ioSync)) |
| 1531 | } |
| 1532 | } |
| 1533 | return |
| 1534 | } |
| 1535 | |
| 1536 | func Write(fd int, p []byte) (n int, err error) { |
| 1537 | if raceenabled { |
| 1538 | raceReleaseMerge(unsafe.Pointer(&ioSync)) |
| 1539 | } |
| 1540 | n, err = write(fd, p) |
| 1541 | if raceenabled && n > 0 { |
| 1542 | raceReadRange(unsafe.Pointer(&p[0]), n) |
| 1543 | } |
| 1544 | return |
| 1545 | } |
| 1546 | |
| 1547 | // For testing: clients can set this flag to force |
| 1548 | // creation of IPv6 sockets to return EAFNOSUPPORT. |
| 1549 | var SocketDisableIPv6 bool |
| 1550 | |
| 1551 | // Sockaddr represents a socket address. |
| 1552 | type Sockaddr interface { |
| 1553 | sockaddr() (ptr unsafe.Pointer, len _Socklen, err error) // lowercase; only we can define Sockaddrs |
| 1554 | } |
| 1555 | |
| 1556 | // SockaddrInet4 implements the Sockaddr interface for AF_INET type sockets. |
| 1557 | type SockaddrInet4 struct { |
| 1558 | Port int |
| 1559 | Addr [4]byte |
| 1560 | raw RawSockaddrInet4 |
| 1561 | } |
| 1562 | |
| 1563 | // SockaddrInet6 implements the Sockaddr interface for AF_INET6 type sockets. |
| 1564 | type SockaddrInet6 struct { |
| 1565 | Port int |
| 1566 | ZoneId uint32 |
| 1567 | Addr [16]byte |
| 1568 | raw RawSockaddrInet6 |
| 1569 | } |
| 1570 | |
| 1571 | // SockaddrUnix implements the Sockaddr interface for AF_UNIX type sockets. |
| 1572 | type SockaddrUnix struct { |
| 1573 | Name string |
| 1574 | raw RawSockaddrUnix |
| 1575 | } |
| 1576 | |
| 1577 | func Bind(fd int, sa Sockaddr) (err error) { |
| 1578 | ptr, n, err := sa.sockaddr() |
| 1579 | if err != nil { |
| 1580 | return err |
| 1581 | } |
| 1582 | return bind(fd, ptr, n) |
| 1583 | } |
| 1584 | |
| 1585 | func Connect(fd int, sa Sockaddr) (err error) { |
| 1586 | ptr, n, err := sa.sockaddr() |
| 1587 | if err != nil { |
| 1588 | return err |
| 1589 | } |
| 1590 | return connect(fd, ptr, n) |
| 1591 | } |
| 1592 | |
| 1593 | func Getpeername(fd int) (sa Sockaddr, err error) { |
| 1594 | var rsa RawSockaddrAny |
| 1595 | var len _Socklen = SizeofSockaddrAny |
| 1596 | if err = getpeername(fd, &rsa, &len); err != nil { |
| 1597 | return |
| 1598 | } |
| 1599 | return anyToSockaddr(fd, &rsa) |
| 1600 | } |
| 1601 | |
| 1602 | func GetsockoptByte(fd, level, opt int) (value byte, err error) { |
| 1603 | var n byte |
| 1604 | vallen := _Socklen(1) |
| 1605 | err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) |
| 1606 | return n, err |
| 1607 | } |
| 1608 | |
| 1609 | func GetsockoptInt(fd, level, opt int) (value int, err error) { |
| 1610 | var n int32 |
| 1611 | vallen := _Socklen(4) |
| 1612 | err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) |
| 1613 | return int(n), err |
| 1614 | } |
| 1615 | |
| 1616 | func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) { |
| 1617 | vallen := _Socklen(4) |
| 1618 | err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen) |
| 1619 | return value, err |
| 1620 | } |
| 1621 | |
| 1622 | func GetsockoptIPMreq(fd, level, opt int) (*IPMreq, error) { |
| 1623 | var value IPMreq |
| 1624 | vallen := _Socklen(SizeofIPMreq) |
| 1625 | err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
| 1626 | return &value, err |
| 1627 | } |
| 1628 | |
| 1629 | func GetsockoptIPv6Mreq(fd, level, opt int) (*IPv6Mreq, error) { |
| 1630 | var value IPv6Mreq |
| 1631 | vallen := _Socklen(SizeofIPv6Mreq) |
| 1632 | err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
| 1633 | return &value, err |
| 1634 | } |
| 1635 | |
| 1636 | func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) { |
| 1637 | var value IPv6MTUInfo |
| 1638 | vallen := _Socklen(SizeofIPv6MTUInfo) |
| 1639 | err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
| 1640 | return &value, err |
| 1641 | } |
| 1642 | |
| 1643 | func GetsockoptICMPv6Filter(fd, level, opt int) (*ICMPv6Filter, error) { |
| 1644 | var value ICMPv6Filter |
| 1645 | vallen := _Socklen(SizeofICMPv6Filter) |
| 1646 | err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
| 1647 | return &value, err |
| 1648 | } |
| 1649 | |
| 1650 | func GetsockoptLinger(fd, level, opt int) (*Linger, error) { |
| 1651 | var linger Linger |
| 1652 | vallen := _Socklen(SizeofLinger) |
| 1653 | err := getsockopt(fd, level, opt, unsafe.Pointer(&linger), &vallen) |
| 1654 | return &linger, err |
| 1655 | } |
| 1656 | |
| 1657 | func GetsockoptTimeval(fd, level, opt int) (*Timeval, error) { |
| 1658 | var tv Timeval |
| 1659 | vallen := _Socklen(unsafe.Sizeof(tv)) |
| 1660 | err := getsockopt(fd, level, opt, unsafe.Pointer(&tv), &vallen) |
| 1661 | return &tv, err |
| 1662 | } |
| 1663 | |
| 1664 | func GetsockoptUint64(fd, level, opt int) (value uint64, err error) { |
| 1665 | var n uint64 |
| 1666 | vallen := _Socklen(8) |
| 1667 | err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) |
| 1668 | return n, err |
| 1669 | } |
| 1670 | |
| 1671 | func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, err error) { |
| 1672 | var rsa RawSockaddrAny |
| 1673 | var len _Socklen = SizeofSockaddrAny |
| 1674 | if n, err = recvfrom(fd, p, flags, &rsa, &len); err != nil { |
| 1675 | return |
| 1676 | } |
| 1677 | if rsa.Addr.Family != AF_UNSPEC { |
| 1678 | from, err = anyToSockaddr(fd, &rsa) |
| 1679 | } |
| 1680 | return |
| 1681 | } |
| 1682 | |
| 1683 | func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) { |
| 1684 | ptr, n, err := to.sockaddr() |
| 1685 | if err != nil { |
| 1686 | return err |
| 1687 | } |
| 1688 | return sendto(fd, p, flags, ptr, n) |
| 1689 | } |
| 1690 | |
| 1691 | func SetsockoptByte(fd, level, opt int, value byte) (err error) { |
| 1692 | return setsockopt(fd, level, opt, unsafe.Pointer(&value), 1) |
| 1693 | } |
| 1694 | |
| 1695 | func SetsockoptInt(fd, level, opt int, value int) (err error) { |
| 1696 | var n = int32(value) |
| 1697 | return setsockopt(fd, level, opt, unsafe.Pointer(&n), 4) |
| 1698 | } |
| 1699 | |
| 1700 | func SetsockoptInet4Addr(fd, level, opt int, value [4]byte) (err error) { |
| 1701 | return setsockopt(fd, level, opt, unsafe.Pointer(&value[0]), 4) |
| 1702 | } |
| 1703 | |
| 1704 | func SetsockoptIPMreq(fd, level, opt int, mreq *IPMreq) (err error) { |
| 1705 | return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPMreq) |
| 1706 | } |
| 1707 | |
| 1708 | func SetsockoptIPv6Mreq(fd, level, opt int, mreq *IPv6Mreq) (err error) { |
| 1709 | return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPv6Mreq) |
| 1710 | } |
| 1711 | |
| 1712 | func SetsockoptICMPv6Filter(fd, level, opt int, filter *ICMPv6Filter) error { |
| 1713 | return setsockopt(fd, level, opt, unsafe.Pointer(filter), SizeofICMPv6Filter) |
| 1714 | } |
| 1715 | |
| 1716 | func SetsockoptLinger(fd, level, opt int, l *Linger) (err error) { |
| 1717 | return setsockopt(fd, level, opt, unsafe.Pointer(l), SizeofLinger) |
| 1718 | } |
| 1719 | |
| 1720 | func SetsockoptString(fd, level, opt int, s string) (err error) { |
| 1721 | var p unsafe.Pointer |
| 1722 | if len(s) > 0 { |
| 1723 | p = unsafe.Pointer(&[]byte(s)[0]) |
| 1724 | } |
| 1725 | return setsockopt(fd, level, opt, p, uintptr(len(s))) |
| 1726 | } |
| 1727 | |
| 1728 | func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (err error) { |
| 1729 | return setsockopt(fd, level, opt, unsafe.Pointer(tv), unsafe.Sizeof(*tv)) |
| 1730 | } |
| 1731 | |
| 1732 | func SetsockoptUint64(fd, level, opt int, value uint64) (err error) { |
| 1733 | return setsockopt(fd, level, opt, unsafe.Pointer(&value), 8) |
| 1734 | } |
| 1735 | |
| 1736 | func Socket(domain, typ, proto int) (fd int, err error) { |
| 1737 | if domain == AF_INET6 && SocketDisableIPv6 { |
| 1738 | return -1, EAFNOSUPPORT |
| 1739 | } |
| 1740 | fd, err = socket(domain, typ, proto) |
| 1741 | return |
| 1742 | } |
| 1743 | |
| 1744 | func Socketpair(domain, typ, proto int) (fd [2]int, err error) { |
| 1745 | var fdx [2]int32 |
| 1746 | err = socketpair(domain, typ, proto, &fdx) |
| 1747 | if err == nil { |
| 1748 | fd[0] = int(fdx[0]) |
| 1749 | fd[1] = int(fdx[1]) |
| 1750 | } |
| 1751 | return |
| 1752 | } |
| 1753 | |
| 1754 | var ioSync int64 |
| 1755 | |
| 1756 | func CloseOnExec(fd int) { fcntl(fd, F_SETFD, FD_CLOEXEC) } |
| 1757 | |
| 1758 | func SetNonblock(fd int, nonblocking bool) (err error) { |
| 1759 | flag, err := fcntl(fd, F_GETFL, 0) |
| 1760 | if err != nil { |
| 1761 | return err |
| 1762 | } |
| 1763 | if nonblocking { |
| 1764 | flag |= O_NONBLOCK |
| 1765 | } else { |
| 1766 | flag &= ^O_NONBLOCK |
| 1767 | } |
| 1768 | _, err = fcntl(fd, F_SETFL, flag) |
| 1769 | return err |
| 1770 | } |
| 1771 | |
| 1772 | // Exec calls execve(2), which replaces the calling executable in the process |
| 1773 | // tree. argv0 should be the full path to an executable ("/bin/ls") and the |
| 1774 | // executable name should also be the first argument in argv (["ls", "-l"]). |
| 1775 | // envv are the environment variables that should be passed to the new |
| 1776 | // process (["USER=go", "PWD=/tmp"]). |
| 1777 | func Exec(argv0 string, argv []string, envv []string) error { |
| 1778 | return syscall.Exec(argv0, argv, envv) |
| 1779 | } |
| 1780 | |
| 1781 | func Mount(source string, target string, fstype string, flags uintptr, data string) (err error) { |
| 1782 | if needspace := 8 - len(fstype); needspace <= 0 { |
| 1783 | fstype = fstype[:8] |
| 1784 | } else { |
| 1785 | fstype += " "[:needspace] |
| 1786 | } |
| 1787 | return mount_LE(target, source, fstype, uint32(flags), int32(len(data)), data) |
| 1788 | } |
| 1789 | |
| 1790 | func Unmount(name string, mtm int) (err error) { |
| 1791 | // mountpoint is always a full path and starts with a '/' |
| 1792 | // check if input string is not a mountpoint but a filesystem name |
| 1793 | if name[0] != '/' { |
| 1794 | return unmount(name, mtm) |
| 1795 | } |
| 1796 | // treat name as mountpoint |
| 1797 | b2s := func(arr []byte) string { |
| 1798 | nulli := bytes.IndexByte(arr, 0) |
| 1799 | if nulli == -1 { |
| 1800 | return string(arr) |
| 1801 | } else { |
| 1802 | return string(arr[:nulli]) |
| 1803 | } |
| 1804 | } |
| 1805 | var buffer struct { |
| 1806 | header W_Mnth |
| 1807 | fsinfo [64]W_Mntent |
| 1808 | } |
| 1809 | fsCount, err := W_Getmntent_A((*byte)(unsafe.Pointer(&buffer)), int(unsafe.Sizeof(buffer))) |
| 1810 | if err != nil { |
| 1811 | return err |
| 1812 | } |
| 1813 | if fsCount == 0 { |
| 1814 | return EINVAL |
| 1815 | } |
| 1816 | for i := 0; i < fsCount; i++ { |
| 1817 | if b2s(buffer.fsinfo[i].Mountpoint[:]) == name { |
| 1818 | err = unmount(b2s(buffer.fsinfo[i].Fsname[:]), mtm) |
| 1819 | break |
| 1820 | } |
| 1821 | } |
| 1822 | return err |
| 1823 | } |