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 syscall 14 15 import ( 16 errorspkg "errors" 17 "unsafe" 18 ) 19 20 const ImplementsGetwd = true 21 22 func Getwd() (string, error) { 23 buf := make([]byte, 2048) 24 attrs, err := getAttrList(".", attrList{CommonAttr: attrCmnFullpath}, buf, 0) 25 if err == nil && len(attrs) == 1 && len(attrs[0]) >= 2 { 26 wd := string(attrs[0]) 27 // Sanity check that it's an absolute path and ends 28 // in a null byte, which we then strip. 29 if wd[0] == '/' && wd[len(wd)-1] == 0 { 30 return wd[:len(wd)-1], nil 31 } 32 } 33 // If pkg/os/getwd.go gets ENOTSUP, it will fall back to the 34 // slow algorithm. 35 return "", ENOTSUP 36 } 37 38 type SockaddrDatalink struct { 39 Len uint8 40 Family uint8 41 Index uint16 42 Type uint8 43 Nlen uint8 44 Alen uint8 45 Slen uint8 46 Data [12]int8 47 raw RawSockaddrDatalink 48 } 49 50 // Translate "kern.hostname" to []_C_int{0,1,2,3}. 51 func nametomib(name string) (mib []_C_int, err error) { 52 const siz = unsafe.Sizeof(mib[0]) 53 54 // NOTE(rsc): It seems strange to set the buffer to have 55 // size CTL_MAXNAME+2 but use only CTL_MAXNAME 56 // as the size. I don't know why the +2 is here, but the 57 // kernel uses +2 for its own implementation of this function. 58 // I am scared that if we don't include the +2 here, the kernel 59 // will silently write 2 words farther than we specify 60 // and we'll get memory corruption. 61 var buf [CTL_MAXNAME + 2]_C_int 62 n := uintptr(CTL_MAXNAME) * siz 63 64 p := (*byte)(unsafe.Pointer(&buf[0])) 65 bytes, err := ByteSliceFromString(name) 66 if err != nil { 67 return nil, err 68 } 69 70 // Magic sysctl: "setting" 0.3 to a string name 71 // lets you read back the array of integers form. 72 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { 73 return nil, err 74 } 75 return buf[0 : n/siz], nil 76 } 77 78 func direntIno(buf []byte) (uint64, bool) { 79 return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) 80 } 81 82 func direntReclen(buf []byte) (uint64, bool) { 83 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) 84 } 85 86 func direntNamlen(buf []byte) (uint64, bool) { 87 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) 88 } 89 90 //sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error) 91 func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) } 92 func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) } 93 94 const ( 95 attrBitMapCount = 5 96 attrCmnModtime = 0x00000400 97 attrCmnAcctime = 0x00001000 98 attrCmnFullpath = 0x08000000 99 ) 100 101 type attrList struct { 102 bitmapCount uint16 103 _ uint16 104 CommonAttr uint32 105 VolAttr uint32 106 DirAttr uint32 107 FileAttr uint32 108 Forkattr uint32 109 } 110 111 func getAttrList(path string, attrList attrList, attrBuf []byte, options uint) (attrs [][]byte, err error) { 112 if len(attrBuf) < 4 { 113 return nil, errorspkg.New("attrBuf too small") 114 } 115 attrList.bitmapCount = attrBitMapCount 116 117 var _p0 *byte 118 _p0, err = BytePtrFromString(path) 119 if err != nil { 120 return nil, err 121 } 122 123 _, _, e1 := Syscall6( 124 SYS_GETATTRLIST, 125 uintptr(unsafe.Pointer(_p0)), 126 uintptr(unsafe.Pointer(&attrList)), 127 uintptr(unsafe.Pointer(&attrBuf[0])), 128 uintptr(len(attrBuf)), 129 uintptr(options), 130 0, 131 ) 132 if e1 != 0 { 133 return nil, e1 134 } 135 size := *(*uint32)(unsafe.Pointer(&attrBuf[0])) 136 137 // dat is the section of attrBuf that contains valid data, 138 // without the 4 byte length header. All attribute offsets 139 // are relative to dat. 140 dat := attrBuf 141 if int(size) < len(attrBuf) { 142 dat = dat[:size] 143 } 144 dat = dat[4:] // remove length prefix 145 146 for i := uint32(0); int(i) < len(dat); { 147 header := dat[i:] 148 if len(header) < 8 { 149 return attrs, errorspkg.New("truncated attribute header") 150 } 151 datOff := *(*int32)(unsafe.Pointer(&header[0])) 152 attrLen := *(*uint32)(unsafe.Pointer(&header[4])) 153 if datOff < 0 || uint32(datOff)+attrLen > uint32(len(dat)) { 154 return attrs, errorspkg.New("truncated results; attrBuf too small") 155 } 156 end := uint32(datOff) + attrLen 157 attrs = append(attrs, dat[datOff:end]) 158 i = end 159 if r := i % 4; r != 0 { 160 i += (4 - r) 161 } 162 } 163 return 164 } 165 166 //sysnb pipe() (r int, w int, err error) 167 168 func Pipe(p []int) (err error) { 169 if len(p) != 2 { 170 return EINVAL 171 } 172 p[0], p[1], err = pipe() 173 return 174 } 175 176 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 177 var _p0 unsafe.Pointer 178 var bufsize uintptr 179 if len(buf) > 0 { 180 _p0 = unsafe.Pointer(&buf[0]) 181 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 182 } 183 r0, _, e1 := Syscall(SYS_GETFSSTAT64, uintptr(_p0), bufsize, uintptr(flags)) 184 n = int(r0) 185 if e1 != 0 { 186 err = e1 187 } 188 return 189 } 190 191 func setattrlistTimes(path string, times []Timespec) error { 192 _p0, err := BytePtrFromString(path) 193 if err != nil { 194 return err 195 } 196 197 var attrList attrList 198 attrList.bitmapCount = attrBitMapCount 199 attrList.CommonAttr = attrCmnModtime | attrCmnAcctime 200 201 // order is mtime, atime: the opposite of Chtimes 202 attributes := [2]Timespec{times[1], times[0]} 203 const options = 0 204 _, _, e1 := Syscall6( 205 SYS_SETATTRLIST, 206 uintptr(unsafe.Pointer(_p0)), 207 uintptr(unsafe.Pointer(&attrList)), 208 uintptr(unsafe.Pointer(&attributes)), 209 uintptr(unsafe.Sizeof(attributes)), 210 uintptr(options), 211 0, 212 ) 213 if e1 != 0 { 214 return e1 215 } 216 return nil 217 } 218 219 func utimensat(dirfd int, path string, times *[2]Timespec, flag int) error { 220 // Darwin doesn't support SYS_UTIMENSAT 221 return ENOSYS 222 } 223 224 /* 225 * Wrapped 226 */ 227 228 //sys kill(pid int, signum int, posix int) (err error) 229 230 func Kill(pid int, signum Signal) (err error) { return kill(pid, int(signum), 1) } 231 232 /* 233 * Exposed directly 234 */ 235 //sys Access(path string, mode uint32) (err error) 236 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 237 //sys Chdir(path string) (err error) 238 //sys Chflags(path string, flags int) (err error) 239 //sys Chmod(path string, mode uint32) (err error) 240 //sys Chown(path string, uid int, gid int) (err error) 241 //sys Chroot(path string) (err error) 242 //sys Close(fd int) (err error) 243 //sys Dup(fd int) (nfd int, err error) 244 //sys Dup2(from int, to int) (err error) 245 //sys Exchangedata(path1 string, path2 string, options int) (err error) 246 //sys Fchdir(fd int) (err error) 247 //sys Fchflags(fd int, flags int) (err error) 248 //sys Fchmod(fd int, mode uint32) (err error) 249 //sys Fchown(fd int, uid int, gid int) (err error) 250 //sys Flock(fd int, how int) (err error) 251 //sys Fpathconf(fd int, name int) (val int, err error) 252 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 253 //sys Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64 254 //sys Fsync(fd int) (err error) 255 //sys Ftruncate(fd int, length int64) (err error) 256 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64 257 //sys Getdtablesize() (size int) 258 //sysnb Getegid() (egid int) 259 //sysnb Geteuid() (uid int) 260 //sysnb Getgid() (gid int) 261 //sysnb Getpgid(pid int) (pgid int, err error) 262 //sysnb Getpgrp() (pgrp int) 263 //sysnb Getpid() (pid int) 264 //sysnb Getppid() (ppid int) 265 //sys Getpriority(which int, who int) (prio int, err error) 266 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 267 //sysnb Getrusage(who int, rusage *Rusage) (err error) 268 //sysnb Getsid(pid int) (sid int, err error) 269 //sysnb Getuid() (uid int) 270 //sysnb Issetugid() (tainted bool) 271 //sys Kqueue() (fd int, err error) 272 //sys Lchown(path string, uid int, gid int) (err error) 273 //sys Link(path string, link string) (err error) 274 //sys Listen(s int, backlog int) (err error) 275 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 276 //sys Mkdir(path string, mode uint32) (err error) 277 //sys Mkfifo(path string, mode uint32) (err error) 278 //sys Mknod(path string, mode uint32, dev int) (err error) 279 //sys Mlock(b []byte) (err error) 280 //sys Mlockall(flags int) (err error) 281 //sys Mprotect(b []byte, prot int) (err error) 282 //sys Munlock(b []byte) (err error) 283 //sys Munlockall() (err error) 284 //sys Open(path string, mode int, perm uint32) (fd int, err error) 285 //sys Pathconf(path string, name int) (val int, err error) 286 //sys Pread(fd int, p []byte, offset int64) (n int, err error) 287 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) 288 //sys read(fd int, p []byte) (n int, err error) 289 //sys Readlink(path string, buf []byte) (n int, err error) 290 //sys Rename(from string, to string) (err error) 291 //sys Revoke(path string) (err error) 292 //sys Rmdir(path string) (err error) 293 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 294 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 295 //sys Setegid(egid int) (err error) 296 //sysnb Seteuid(euid int) (err error) 297 //sysnb Setgid(gid int) (err error) 298 //sys Setlogin(name string) (err error) 299 //sysnb Setpgid(pid int, pgid int) (err error) 300 //sys Setpriority(which int, who int, prio int) (err error) 301 //sys Setprivexec(flag int) (err error) 302 //sysnb Setregid(rgid int, egid int) (err error) 303 //sysnb Setreuid(ruid int, euid int) (err error) 304 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 305 //sysnb Setsid() (pid int, err error) 306 //sysnb Settimeofday(tp *Timeval) (err error) 307 //sysnb Setuid(uid int) (err error) 308 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 309 //sys Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64 310 //sys Symlink(path string, link string) (err error) 311 //sys Sync() (err error) 312 //sys Truncate(path string, length int64) (err error) 313 //sys Umask(newmask int) (oldmask int) 314 //sys Undelete(path string) (err error) 315 //sys Unlink(path string) (err error) 316 //sys Unmount(path string, flags int) (err error) 317 //sys write(fd int, p []byte) (n int, err error) 318 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 319 //sys munmap(addr uintptr, length uintptr) (err error) 320 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 321 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 322 323 /* 324 * Unimplemented 325 */ 326 // Profil 327 // Sigaction 328 // Sigprocmask 329 // Getlogin 330 // Sigpending 331 // Sigaltstack 332 // Ioctl 333 // Reboot 334 // Execve 335 // Vfork 336 // Sbrk 337 // Sstk 338 // Ovadvise 339 // Mincore 340 // Setitimer 341 // Swapon 342 // Select 343 // Sigsuspend 344 // Readv 345 // Writev 346 // Nfssvc 347 // Getfh 348 // Quotactl 349 // Mount 350 // Csops 351 // Waitid 352 // Add_profil 353 // Kdebug_trace 354 // Sigreturn 355 // Mmap 356 // Mlock 357 // Munlock 358 // Atsocket 359 // Kqueue_from_portset_np 360 // Kqueue_portset 361 // Getattrlist 362 // Setattrlist 363 // Getdirentriesattr 364 // Searchfs 365 // Delete 366 // Copyfile 367 // Poll 368 // Watchevent 369 // Waitevent 370 // Modwatch 371 // Getxattr 372 // Fgetxattr 373 // Setxattr 374 // Fsetxattr 375 // Removexattr 376 // Fremovexattr 377 // Listxattr 378 // Flistxattr 379 // Fsctl 380 // Initgroups 381 // Posix_spawn 382 // Nfsclnt 383 // Fhopen 384 // Minherit 385 // Semsys 386 // Msgsys 387 // Shmsys 388 // Semctl 389 // Semget 390 // Semop 391 // Msgctl 392 // Msgget 393 // Msgsnd 394 // Msgrcv 395 // Shmat 396 // Shmctl 397 // Shmdt 398 // Shmget 399 // Shm_open 400 // Shm_unlink 401 // Sem_open 402 // Sem_close 403 // Sem_unlink 404 // Sem_wait 405 // Sem_trywait 406 // Sem_post 407 // Sem_getvalue 408 // Sem_init 409 // Sem_destroy 410 // Open_extended 411 // Umask_extended 412 // Stat_extended 413 // Lstat_extended 414 // Fstat_extended 415 // Chmod_extended 416 // Fchmod_extended 417 // Access_extended 418 // Settid 419 // Gettid 420 // Setsgroups 421 // Getsgroups 422 // Setwgroups 423 // Getwgroups 424 // Mkfifo_extended 425 // Mkdir_extended 426 // Identitysvc 427 // Shared_region_check_np 428 // Shared_region_map_np 429 // __pthread_mutex_destroy 430 // __pthread_mutex_init 431 // __pthread_mutex_lock 432 // __pthread_mutex_trylock 433 // __pthread_mutex_unlock 434 // __pthread_cond_init 435 // __pthread_cond_destroy 436 // __pthread_cond_broadcast 437 // __pthread_cond_signal 438 // Setsid_with_pid 439 // __pthread_cond_timedwait 440 // Aio_fsync 441 // Aio_return 442 // Aio_suspend 443 // Aio_cancel 444 // Aio_error 445 // Aio_read 446 // Aio_write 447 // Lio_listio 448 // __pthread_cond_wait 449 // Iopolicysys 450 // Mlockall 451 // Munlockall 452 // __pthread_kill 453 // __pthread_sigmask 454 // __sigwait 455 // __disable_threadsignal 456 // __pthread_markcancel 457 // __pthread_canceled 458 // __semwait_signal 459 // Proc_info 460 // sendfile 461 // Stat64_extended 462 // Lstat64_extended 463 // Fstat64_extended 464 // __pthread_chdir 465 // __pthread_fchdir 466 // Audit 467 // Auditon 468 // Getauid 469 // Setauid 470 // Getaudit 471 // Setaudit 472 // Getaudit_addr 473 // Setaudit_addr 474 // Auditctl 475 // Bsdthread_create 476 // Bsdthread_terminate 477 // Stack_snapshot 478 // Bsdthread_register 479 // Workq_open 480 // Workq_ops 481 // __mac_execve 482 // __mac_syscall 483 // __mac_get_file 484 // __mac_set_file 485 // __mac_get_link 486 // __mac_set_link 487 // __mac_get_proc 488 // __mac_set_proc 489 // __mac_get_fd 490 // __mac_set_fd 491 // __mac_get_pid 492 // __mac_get_lcid 493 // __mac_get_lctx 494 // __mac_set_lctx 495 // Setlcid 496 // Read_nocancel 497 // Write_nocancel 498 // Open_nocancel 499 // Close_nocancel 500 // Wait4_nocancel 501 // Recvmsg_nocancel 502 // Sendmsg_nocancel 503 // Recvfrom_nocancel 504 // Accept_nocancel 505 // Msync_nocancel 506 // Fcntl_nocancel 507 // Select_nocancel 508 // Fsync_nocancel 509 // Connect_nocancel 510 // Sigsuspend_nocancel 511 // Readv_nocancel 512 // Writev_nocancel 513 // Sendto_nocancel 514 // Pread_nocancel 515 // Pwrite_nocancel 516 // Waitid_nocancel 517 // Poll_nocancel 518 // Msgsnd_nocancel 519 // Msgrcv_nocancel 520 // Sem_wait_nocancel 521 // Aio_suspend_nocancel 522 // __sigwait_nocancel 523 // __semwait_signal_nocancel 524 // __mac_mount 525 // __mac_get_mount 526 // __mac_getfsstat 527
