github.com/jgarto/itcv@v0.0.0-20180826224514-4eea09c1aa0d/_vendor/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 /* 191 * Wrapped 192 */ 193 194 //sys kill(pid int, signum int, posix int) (err error) 195 196 func Kill(pid int, signum syscall.Signal) (err error) { return kill(pid, int(signum), 1) } 197 198 /* 199 * Exposed directly 200 */ 201 //sys Access(path string, mode uint32) (err error) 202 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 203 //sys Chdir(path string) (err error) 204 //sys Chflags(path string, flags int) (err error) 205 //sys Chmod(path string, mode uint32) (err error) 206 //sys Chown(path string, uid int, gid int) (err error) 207 //sys Chroot(path string) (err error) 208 //sys Close(fd int) (err error) 209 //sys Dup(fd int) (nfd int, err error) 210 //sys Dup2(from int, to int) (err error) 211 //sys Exchangedata(path1 string, path2 string, options int) (err error) 212 //sys Exit(code int) 213 //sys Fchdir(fd int) (err error) 214 //sys Fchflags(fd int, flags int) (err error) 215 //sys Fchmod(fd int, mode uint32) (err error) 216 //sys Fchown(fd int, uid int, gid int) (err error) 217 //sys Flock(fd int, how int) (err error) 218 //sys Fpathconf(fd int, name int) (val int, err error) 219 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 220 //sys Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64 221 //sys Fsync(fd int) (err error) 222 //sys Ftruncate(fd int, length int64) (err error) 223 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64 224 //sys Getdtablesize() (size int) 225 //sysnb Getegid() (egid int) 226 //sysnb Geteuid() (uid int) 227 //sysnb Getgid() (gid int) 228 //sysnb Getpgid(pid int) (pgid int, err error) 229 //sysnb Getpgrp() (pgrp int) 230 //sysnb Getpid() (pid int) 231 //sysnb Getppid() (ppid int) 232 //sys Getpriority(which int, who int) (prio int, err error) 233 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 234 //sysnb Getrusage(who int, rusage *Rusage) (err error) 235 //sysnb Getsid(pid int) (sid int, err error) 236 //sysnb Getuid() (uid int) 237 //sysnb Issetugid() (tainted bool) 238 //sys Kqueue() (fd int, err error) 239 //sys Lchown(path string, uid int, gid int) (err error) 240 //sys Link(path string, link string) (err error) 241 //sys Listen(s int, backlog int) (err error) 242 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 243 //sys Mkdir(path string, mode uint32) (err error) 244 //sys Mkfifo(path string, mode uint32) (err error) 245 //sys Mknod(path string, mode uint32, dev int) (err error) 246 //sys Mlock(b []byte) (err error) 247 //sys Mlockall(flags int) (err error) 248 //sys Mprotect(b []byte, prot int) (err error) 249 //sys Munlock(b []byte) (err error) 250 //sys Munlockall() (err error) 251 //sys Open(path string, mode int, perm uint32) (fd int, err error) 252 //sys Pathconf(path string, name int) (val int, err error) 253 //sys Pread(fd int, p []byte, offset int64) (n int, err error) 254 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) 255 //sys read(fd int, p []byte) (n int, err error) 256 //sys Readlink(path string, buf []byte) (n int, err error) 257 //sys Rename(from string, to string) (err error) 258 //sys Revoke(path string) (err error) 259 //sys Rmdir(path string) (err error) 260 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 261 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 262 //sys Setegid(egid int) (err error) 263 //sysnb Seteuid(euid int) (err error) 264 //sysnb Setgid(gid int) (err error) 265 //sys Setlogin(name string) (err error) 266 //sysnb Setpgid(pid int, pgid int) (err error) 267 //sys Setpriority(which int, who int, prio int) (err error) 268 //sys Setprivexec(flag int) (err error) 269 //sysnb Setregid(rgid int, egid int) (err error) 270 //sysnb Setreuid(ruid int, euid int) (err error) 271 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 272 //sysnb Setsid() (pid int, err error) 273 //sysnb Settimeofday(tp *Timeval) (err error) 274 //sysnb Setuid(uid int) (err error) 275 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 276 //sys Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64 277 //sys Symlink(path string, link string) (err error) 278 //sys Sync() (err error) 279 //sys Truncate(path string, length int64) (err error) 280 //sys Umask(newmask int) (oldmask int) 281 //sys Undelete(path string) (err error) 282 //sys Unlink(path string) (err error) 283 //sys Unmount(path string, flags int) (err error) 284 //sys write(fd int, p []byte) (n int, err error) 285 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 286 //sys munmap(addr uintptr, length uintptr) (err error) 287 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 288 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 289 290 /* 291 * Unimplemented 292 */ 293 // Profil 294 // Sigaction 295 // Sigprocmask 296 // Getlogin 297 // Sigpending 298 // Sigaltstack 299 // Ioctl 300 // Reboot 301 // Execve 302 // Vfork 303 // Sbrk 304 // Sstk 305 // Ovadvise 306 // Mincore 307 // Setitimer 308 // Swapon 309 // Select 310 // Sigsuspend 311 // Readv 312 // Writev 313 // Nfssvc 314 // Getfh 315 // Quotactl 316 // Mount 317 // Csops 318 // Waitid 319 // Add_profil 320 // Kdebug_trace 321 // Sigreturn 322 // Mmap 323 // Mlock 324 // Munlock 325 // Atsocket 326 // Kqueue_from_portset_np 327 // Kqueue_portset 328 // Getattrlist 329 // Setattrlist 330 // Getdirentriesattr 331 // Searchfs 332 // Delete 333 // Copyfile 334 // Poll 335 // Watchevent 336 // Waitevent 337 // Modwatch 338 // Getxattr 339 // Fgetxattr 340 // Setxattr 341 // Fsetxattr 342 // Removexattr 343 // Fremovexattr 344 // Listxattr 345 // Flistxattr 346 // Fsctl 347 // Initgroups 348 // Posix_spawn 349 // Nfsclnt 350 // Fhopen 351 // Minherit 352 // Semsys 353 // Msgsys 354 // Shmsys 355 // Semctl 356 // Semget 357 // Semop 358 // Msgctl 359 // Msgget 360 // Msgsnd 361 // Msgrcv 362 // Shmat 363 // Shmctl 364 // Shmdt 365 // Shmget 366 // Shm_open 367 // Shm_unlink 368 // Sem_open 369 // Sem_close 370 // Sem_unlink 371 // Sem_wait 372 // Sem_trywait 373 // Sem_post 374 // Sem_getvalue 375 // Sem_init 376 // Sem_destroy 377 // Open_extended 378 // Umask_extended 379 // Stat_extended 380 // Lstat_extended 381 // Fstat_extended 382 // Chmod_extended 383 // Fchmod_extended 384 // Access_extended 385 // Settid 386 // Gettid 387 // Setsgroups 388 // Getsgroups 389 // Setwgroups 390 // Getwgroups 391 // Mkfifo_extended 392 // Mkdir_extended 393 // Identitysvc 394 // Shared_region_check_np 395 // Shared_region_map_np 396 // __pthread_mutex_destroy 397 // __pthread_mutex_init 398 // __pthread_mutex_lock 399 // __pthread_mutex_trylock 400 // __pthread_mutex_unlock 401 // __pthread_cond_init 402 // __pthread_cond_destroy 403 // __pthread_cond_broadcast 404 // __pthread_cond_signal 405 // Setsid_with_pid 406 // __pthread_cond_timedwait 407 // Aio_fsync 408 // Aio_return 409 // Aio_suspend 410 // Aio_cancel 411 // Aio_error 412 // Aio_read 413 // Aio_write 414 // Lio_listio 415 // __pthread_cond_wait 416 // Iopolicysys 417 // Mlockall 418 // Munlockall 419 // __pthread_kill 420 // __pthread_sigmask 421 // __sigwait 422 // __disable_threadsignal 423 // __pthread_markcancel 424 // __pthread_canceled 425 // __semwait_signal 426 // Proc_info 427 // sendfile 428 // Stat64_extended 429 // Lstat64_extended 430 // Fstat64_extended 431 // __pthread_chdir 432 // __pthread_fchdir 433 // Audit 434 // Auditon 435 // Getauid 436 // Setauid 437 // Getaudit 438 // Setaudit 439 // Getaudit_addr 440 // Setaudit_addr 441 // Auditctl 442 // Bsdthread_create 443 // Bsdthread_terminate 444 // Stack_snapshot 445 // Bsdthread_register 446 // Workq_open 447 // Workq_ops 448 // __mac_execve 449 // __mac_syscall 450 // __mac_get_file 451 // __mac_set_file 452 // __mac_get_link 453 // __mac_set_link 454 // __mac_get_proc 455 // __mac_set_proc 456 // __mac_get_fd 457 // __mac_set_fd 458 // __mac_get_pid 459 // __mac_get_lcid 460 // __mac_get_lctx 461 // __mac_set_lctx 462 // Setlcid 463 // Read_nocancel 464 // Write_nocancel 465 // Open_nocancel 466 // Close_nocancel 467 // Wait4_nocancel 468 // Recvmsg_nocancel 469 // Sendmsg_nocancel 470 // Recvfrom_nocancel 471 // Accept_nocancel 472 // Msync_nocancel 473 // Fcntl_nocancel 474 // Select_nocancel 475 // Fsync_nocancel 476 // Connect_nocancel 477 // Sigsuspend_nocancel 478 // Readv_nocancel 479 // Writev_nocancel 480 // Sendto_nocancel 481 // Pread_nocancel 482 // Pwrite_nocancel 483 // Waitid_nocancel 484 // Poll_nocancel 485 // Msgsnd_nocancel 486 // Msgrcv_nocancel 487 // Sem_wait_nocancel 488 // Aio_suspend_nocancel 489 // __sigwait_nocancel 490 // __semwait_signal_nocancel 491 // __mac_mount 492 // __mac_get_mount 493 // __mac_getfsstat