github.com/dolotech/hongbao@v0.0.0-20191130105438-fd59d7a5dda5/src/golang.org/x/sys/unix/syscall_darwin.go (about) 1 // Copyright 2009,2010 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 // Darwin system calls. 6 // This file is compiled as ordinary Go code, 7 // but it is also input to mksyscall, 8 // which parses the //sys lines and generates system call stubs. 9 // Note that sometimes we use a lowercase //sys name and wrap 10 // it in our own nicer implementation, either here or in 11 // syscall_bsd.go or syscall_unix.go. 12 13 package unix 14 15 import ( 16 errorspkg "errors" 17 "syscall" 18 "unsafe" 19 ) 20 21 const ImplementsGetwd = true 22 23 func Getwd() (string, error) { 24 buf := make([]byte, 2048) 25 attrs, err := getAttrList(".", attrList{CommonAttr: attrCmnFullpath}, buf, 0) 26 if err == nil && len(attrs) == 1 && len(attrs[0]) >= 2 { 27 wd := string(attrs[0]) 28 // Sanity check that it's an absolute path and ends 29 // in a null byte, which we then strip. 30 if wd[0] == '/' && wd[len(wd)-1] == 0 { 31 return wd[:len(wd)-1], nil 32 } 33 } 34 // If pkg/os/getwd.go gets ENOTSUP, it will fall back to the 35 // slow algorithm. 36 return "", ENOTSUP 37 } 38 39 type SockaddrDatalink struct { 40 Len uint8 41 Family uint8 42 Index uint16 43 Type uint8 44 Nlen uint8 45 Alen uint8 46 Slen uint8 47 Data [12]int8 48 raw RawSockaddrDatalink 49 } 50 51 // Translate "kern.hostname" to []_C_int{0,1,2,3}. 52 func nametomib(name string) (mib []_C_int, err error) { 53 const siz = unsafe.Sizeof(mib[0]) 54 55 // NOTE(rsc): It seems strange to set the buffer to have 56 // size CTL_MAXNAME+2 but use only CTL_MAXNAME 57 // as the size. I don't know why the +2 is here, but the 58 // kernel uses +2 for its own implementation of this function. 59 // I am scared that if we don't include the +2 here, the kernel 60 // will silently write 2 words farther than we specify 61 // and we'll get memory corruption. 62 var buf [CTL_MAXNAME + 2]_C_int 63 n := uintptr(CTL_MAXNAME) * siz 64 65 p := (*byte)(unsafe.Pointer(&buf[0])) 66 bytes, err := ByteSliceFromString(name) 67 if err != nil { 68 return nil, err 69 } 70 71 // Magic sysctl: "setting" 0.3 to a string name 72 // lets you read back the array of integers form. 73 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { 74 return nil, err 75 } 76 return buf[0 : n/siz], nil 77 } 78 79 func direntIno(buf []byte) (uint64, bool) { 80 return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) 81 } 82 83 func direntReclen(buf []byte) (uint64, bool) { 84 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) 85 } 86 87 func direntNamlen(buf []byte) (uint64, bool) { 88 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) 89 } 90 91 //sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error) 92 func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) } 93 func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) } 94 95 const ( 96 attrBitMapCount = 5 97 attrCmnFullpath = 0x08000000 98 ) 99 100 type attrList struct { 101 bitmapCount uint16 102 _ uint16 103 CommonAttr uint32 104 VolAttr uint32 105 DirAttr uint32 106 FileAttr uint32 107 Forkattr uint32 108 } 109 110 func getAttrList(path string, attrList attrList, attrBuf []byte, options uint) (attrs [][]byte, err error) { 111 if len(attrBuf) < 4 { 112 return nil, errorspkg.New("attrBuf too small") 113 } 114 attrList.bitmapCount = attrBitMapCount 115 116 var _p0 *byte 117 _p0, err = BytePtrFromString(path) 118 if err != nil { 119 return nil, err 120 } 121 122 _, _, e1 := Syscall6( 123 SYS_GETATTRLIST, 124 uintptr(unsafe.Pointer(_p0)), 125 uintptr(unsafe.Pointer(&attrList)), 126 uintptr(unsafe.Pointer(&attrBuf[0])), 127 uintptr(len(attrBuf)), 128 uintptr(options), 129 0, 130 ) 131 if e1 != 0 { 132 return nil, e1 133 } 134 size := *(*uint32)(unsafe.Pointer(&attrBuf[0])) 135 136 // dat is the section of attrBuf that contains valid data, 137 // without the 4 byte length header. All attribute offsets 138 // are relative to dat. 139 dat := attrBuf 140 if int(size) < len(attrBuf) { 141 dat = dat[:size] 142 } 143 dat = dat[4:] // remove length prefix 144 145 for i := uint32(0); int(i) < len(dat); { 146 header := dat[i:] 147 if len(header) < 8 { 148 return attrs, errorspkg.New("truncated attribute header") 149 } 150 datOff := *(*int32)(unsafe.Pointer(&header[0])) 151 attrLen := *(*uint32)(unsafe.Pointer(&header[4])) 152 if datOff < 0 || uint32(datOff)+attrLen > uint32(len(dat)) { 153 return attrs, errorspkg.New("truncated results; attrBuf too small") 154 } 155 end := uint32(datOff) + attrLen 156 attrs = append(attrs, dat[datOff:end]) 157 i = end 158 if r := i % 4; r != 0 { 159 i += (4 - r) 160 } 161 } 162 return 163 } 164 165 //sysnb pipe() (r int, w int, err error) 166 167 func Pipe(p []int) (err error) { 168 if len(p) != 2 { 169 return EINVAL 170 } 171 p[0], p[1], err = pipe() 172 return 173 } 174 175 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 176 var _p0 unsafe.Pointer 177 var bufsize uintptr 178 if len(buf) > 0 { 179 _p0 = unsafe.Pointer(&buf[0]) 180 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 181 } 182 r0, _, e1 := Syscall(SYS_GETFSSTAT64, uintptr(_p0), bufsize, uintptr(flags)) 183 n = int(r0) 184 if e1 != 0 { 185 err = e1 186 } 187 return 188 } 189 190 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) error { 191 // Darwin doesn't support SYS_UTIMENSAT 192 return ENOSYS 193 } 194 195 /* 196 * Wrapped 197 */ 198 199 //sys kill(pid int, signum int, posix int) (err error) 200 201 func Kill(pid int, signum syscall.Signal) (err error) { return kill(pid, int(signum), 1) } 202 203 //sys ioctl(fd int, req uint, arg uintptr) (err error) 204 205 // ioctl itself should not be exposed directly, but additional get/set 206 // functions for specific types are permissible. 207 208 // IoctlSetInt performs an ioctl operation which sets an integer value 209 // on fd, using the specified request number. 210 func IoctlSetInt(fd int, req uint, value int) error { 211 return ioctl(fd, req, uintptr(value)) 212 } 213 214 func IoctlSetWinsize(fd int, req uint, value *Winsize) error { 215 return ioctl(fd, req, uintptr(unsafe.Pointer(value))) 216 } 217 218 func IoctlSetTermios(fd int, req uint, value *Termios) error { 219 return ioctl(fd, req, uintptr(unsafe.Pointer(value))) 220 } 221 222 // IoctlGetInt performs an ioctl operation which gets an integer value 223 // from fd, using the specified request number. 224 func IoctlGetInt(fd int, req uint) (int, error) { 225 var value int 226 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 227 return value, err 228 } 229 230 func IoctlGetWinsize(fd int, req uint) (*Winsize, error) { 231 var value Winsize 232 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 233 return &value, err 234 } 235 236 func IoctlGetTermios(fd int, req uint) (*Termios, error) { 237 var value Termios 238 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 239 return &value, err 240 } 241 242 /* 243 * Exposed directly 244 */ 245 //sys Access(path string, mode uint32) (err error) 246 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 247 //sys Chdir(path string) (err error) 248 //sys Chflags(path string, flags int) (err error) 249 //sys Chmod(path string, mode uint32) (err error) 250 //sys Chown(path string, uid int, gid int) (err error) 251 //sys Chroot(path string) (err error) 252 //sys Close(fd int) (err error) 253 //sys Dup(fd int) (nfd int, err error) 254 //sys Dup2(from int, to int) (err error) 255 //sys Exchangedata(path1 string, path2 string, options int) (err error) 256 //sys Exit(code int) 257 //sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) 258 //sys Fchdir(fd int) (err error) 259 //sys Fchflags(fd int, flags int) (err error) 260 //sys Fchmod(fd int, mode uint32) (err error) 261 //sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) 262 //sys Fchown(fd int, uid int, gid int) (err error) 263 //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) 264 //sys Flock(fd int, how int) (err error) 265 //sys Fpathconf(fd int, name int) (val int, err error) 266 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 267 //sys Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64 268 //sys Fsync(fd int) (err error) 269 //sys Ftruncate(fd int, length int64) (err error) 270 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64 271 //sys Getdtablesize() (size int) 272 //sysnb Getegid() (egid int) 273 //sysnb Geteuid() (uid int) 274 //sysnb Getgid() (gid int) 275 //sysnb Getpgid(pid int) (pgid int, err error) 276 //sysnb Getpgrp() (pgrp int) 277 //sysnb Getpid() (pid int) 278 //sysnb Getppid() (ppid int) 279 //sys Getpriority(which int, who int) (prio int, err error) 280 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 281 //sysnb Getrusage(who int, rusage *Rusage) (err error) 282 //sysnb Getsid(pid int) (sid int, err error) 283 //sysnb Getuid() (uid int) 284 //sysnb Issetugid() (tainted bool) 285 //sys Kqueue() (fd int, err error) 286 //sys Lchown(path string, uid int, gid int) (err error) 287 //sys Link(path string, link string) (err error) 288 //sys Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error) 289 //sys Listen(s int, backlog int) (err error) 290 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 291 //sys Mkdir(path string, mode uint32) (err error) 292 //sys Mkdirat(dirfd int, path string, mode uint32) (err error) 293 //sys Mkfifo(path string, mode uint32) (err error) 294 //sys Mknod(path string, mode uint32, dev int) (err error) 295 //sys Open(path string, mode int, perm uint32) (fd int, err error) 296 //sys Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) 297 //sys Pathconf(path string, name int) (val int, err error) 298 //sys Pread(fd int, p []byte, offset int64) (n int, err error) 299 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) 300 //sys read(fd int, p []byte) (n int, err error) 301 //sys Readlink(path string, buf []byte) (n int, err error) 302 //sys Readlinkat(dirfd int, path string, buf []byte) (n int, err error) 303 //sys Rename(from string, to string) (err error) 304 //sys Renameat(fromfd int, from string, tofd int, to string) (err error) 305 //sys Revoke(path string) (err error) 306 //sys Rmdir(path string) (err error) 307 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 308 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 309 //sys Setegid(egid int) (err error) 310 //sysnb Seteuid(euid int) (err error) 311 //sysnb Setgid(gid int) (err error) 312 //sys Setlogin(name string) (err error) 313 //sysnb Setpgid(pid int, pgid int) (err error) 314 //sys Setpriority(which int, who int, prio int) (err error) 315 //sys Setprivexec(flag int) (err error) 316 //sysnb Setregid(rgid int, egid int) (err error) 317 //sysnb Setreuid(ruid int, euid int) (err error) 318 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 319 //sysnb Setsid() (pid int, err error) 320 //sysnb Settimeofday(tp *Timeval) (err error) 321 //sysnb Setuid(uid int) (err error) 322 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 323 //sys Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64 324 //sys Symlink(path string, link string) (err error) 325 //sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error) 326 //sys Sync() (err error) 327 //sys Truncate(path string, length int64) (err error) 328 //sys Umask(newmask int) (oldmask int) 329 //sys Undelete(path string) (err error) 330 //sys Unlink(path string) (err error) 331 //sys Unlinkat(dirfd int, path string, flags int) (err error) 332 //sys Unmount(path string, flags int) (err error) 333 //sys write(fd int, p []byte) (n int, err error) 334 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 335 //sys munmap(addr uintptr, length uintptr) (err error) 336 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 337 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 338 339 /* 340 * Unimplemented 341 */ 342 // Profil 343 // Sigaction 344 // Sigprocmask 345 // Getlogin 346 // Sigpending 347 // Sigaltstack 348 // Ioctl 349 // Reboot 350 // Execve 351 // Vfork 352 // Sbrk 353 // Sstk 354 // Ovadvise 355 // Mincore 356 // Setitimer 357 // Swapon 358 // Select 359 // Sigsuspend 360 // Readv 361 // Writev 362 // Nfssvc 363 // Getfh 364 // Quotactl 365 // Mount 366 // Csops 367 // Waitid 368 // Add_profil 369 // Kdebug_trace 370 // Sigreturn 371 // Atsocket 372 // Kqueue_from_portset_np 373 // Kqueue_portset 374 // Getattrlist 375 // Setattrlist 376 // Getdirentriesattr 377 // Searchfs 378 // Delete 379 // Copyfile 380 // Poll 381 // Watchevent 382 // Waitevent 383 // Modwatch 384 // Getxattr 385 // Fgetxattr 386 // Setxattr 387 // Fsetxattr 388 // Removexattr 389 // Fremovexattr 390 // Listxattr 391 // Flistxattr 392 // Fsctl 393 // Initgroups 394 // Posix_spawn 395 // Nfsclnt 396 // Fhopen 397 // Minherit 398 // Semsys 399 // Msgsys 400 // Shmsys 401 // Semctl 402 // Semget 403 // Semop 404 // Msgctl 405 // Msgget 406 // Msgsnd 407 // Msgrcv 408 // Shmat 409 // Shmctl 410 // Shmdt 411 // Shmget 412 // Shm_open 413 // Shm_unlink 414 // Sem_open 415 // Sem_close 416 // Sem_unlink 417 // Sem_wait 418 // Sem_trywait 419 // Sem_post 420 // Sem_getvalue 421 // Sem_init 422 // Sem_destroy 423 // Open_extended 424 // Umask_extended 425 // Stat_extended 426 // Lstat_extended 427 // Fstat_extended 428 // Chmod_extended 429 // Fchmod_extended 430 // Access_extended 431 // Settid 432 // Gettid 433 // Setsgroups 434 // Getsgroups 435 // Setwgroups 436 // Getwgroups 437 // Mkfifo_extended 438 // Mkdir_extended 439 // Identitysvc 440 // Shared_region_check_np 441 // Shared_region_map_np 442 // __pthread_mutex_destroy 443 // __pthread_mutex_init 444 // __pthread_mutex_lock 445 // __pthread_mutex_trylock 446 // __pthread_mutex_unlock 447 // __pthread_cond_init 448 // __pthread_cond_destroy 449 // __pthread_cond_broadcast 450 // __pthread_cond_signal 451 // Setsid_with_pid 452 // __pthread_cond_timedwait 453 // Aio_fsync 454 // Aio_return 455 // Aio_suspend 456 // Aio_cancel 457 // Aio_error 458 // Aio_read 459 // Aio_write 460 // Lio_listio 461 // __pthread_cond_wait 462 // Iopolicysys 463 // __pthread_kill 464 // __pthread_sigmask 465 // __sigwait 466 // __disable_threadsignal 467 // __pthread_markcancel 468 // __pthread_canceled 469 // __semwait_signal 470 // Proc_info 471 // sendfile 472 // Stat64_extended 473 // Lstat64_extended 474 // Fstat64_extended 475 // __pthread_chdir 476 // __pthread_fchdir 477 // Audit 478 // Auditon 479 // Getauid 480 // Setauid 481 // Getaudit 482 // Setaudit 483 // Getaudit_addr 484 // Setaudit_addr 485 // Auditctl 486 // Bsdthread_create 487 // Bsdthread_terminate 488 // Stack_snapshot 489 // Bsdthread_register 490 // Workq_open 491 // Workq_ops 492 // __mac_execve 493 // __mac_syscall 494 // __mac_get_file 495 // __mac_set_file 496 // __mac_get_link 497 // __mac_set_link 498 // __mac_get_proc 499 // __mac_set_proc 500 // __mac_get_fd 501 // __mac_set_fd 502 // __mac_get_pid 503 // __mac_get_lcid 504 // __mac_get_lctx 505 // __mac_set_lctx 506 // Setlcid 507 // Read_nocancel 508 // Write_nocancel 509 // Open_nocancel 510 // Close_nocancel 511 // Wait4_nocancel 512 // Recvmsg_nocancel 513 // Sendmsg_nocancel 514 // Recvfrom_nocancel 515 // Accept_nocancel 516 // Fcntl_nocancel 517 // Select_nocancel 518 // Fsync_nocancel 519 // Connect_nocancel 520 // Sigsuspend_nocancel 521 // Readv_nocancel 522 // Writev_nocancel 523 // Sendto_nocancel 524 // Pread_nocancel 525 // Pwrite_nocancel 526 // Waitid_nocancel 527 // Poll_nocancel 528 // Msgsnd_nocancel 529 // Msgrcv_nocancel 530 // Sem_wait_nocancel 531 // Aio_suspend_nocancel 532 // __sigwait_nocancel 533 // __semwait_signal_nocancel 534 // __mac_mount 535 // __mac_get_mount 536 // __mac_getfsstat