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 attrCmnFullpath = 0x08000000 97 ) 98 99 type attrList struct { 100 bitmapCount uint16 101 _ uint16 102 CommonAttr uint32 103 VolAttr uint32 104 DirAttr uint32 105 FileAttr uint32 106 Forkattr uint32 107 } 108 109 func getAttrList(path string, attrList attrList, attrBuf []byte, options uint) (attrs [][]byte, err error) { 110 if len(attrBuf) < 4 { 111 return nil, errorspkg.New("attrBuf too small") 112 } 113 attrList.bitmapCount = attrBitMapCount 114 115 var _p0 *byte 116 _p0, err = BytePtrFromString(path) 117 if err != nil { 118 return nil, err 119 } 120 121 _, _, e1 := Syscall6( 122 SYS_GETATTRLIST, 123 uintptr(unsafe.Pointer(_p0)), 124 uintptr(unsafe.Pointer(&attrList)), 125 uintptr(unsafe.Pointer(&attrBuf[0])), 126 uintptr(len(attrBuf)), 127 uintptr(options), 128 0, 129 ) 130 use(unsafe.Pointer(_p0)) 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 use(unsafe.Pointer(_p0)) 184 n = int(r0) 185 if e1 != 0 { 186 err = e1 187 } 188 return 189 } 190 191 /* 192 * Wrapped 193 */ 194 195 //sys kill(pid int, signum int, posix int) (err error) 196 197 func Kill(pid int, signum Signal) (err error) { return kill(pid, int(signum), 1) } 198 199 /* 200 * Exposed directly 201 */ 202 //sys Access(path string, mode uint32) (err error) 203 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 204 //sys Chdir(path string) (err error) 205 //sys Chflags(path string, flags int) (err error) 206 //sys Chmod(path string, mode uint32) (err error) 207 //sys Chown(path string, uid int, gid int) (err error) 208 //sys Chroot(path string) (err error) 209 //sys Close(fd int) (err error) 210 //sys Dup(fd int) (nfd int, err error) 211 //sys Dup2(from int, to int) (err error) 212 //sys Exchangedata(path1 string, path2 string, options int) (err error) 213 //sys Exit(code int) 214 //sys Fchdir(fd int) (err error) 215 //sys Fchflags(fd int, flags int) (err error) 216 //sys Fchmod(fd int, mode uint32) (err error) 217 //sys Fchown(fd int, uid int, gid int) (err error) 218 //sys Flock(fd int, how int) (err error) 219 //sys Fpathconf(fd int, name int) (val int, err error) 220 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 221 //sys Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64 222 //sys Fsync(fd int) (err error) 223 //sys Ftruncate(fd int, length int64) (err error) 224 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64 225 //sys Getdtablesize() (size int) 226 //sysnb Getegid() (egid int) 227 //sysnb Geteuid() (uid int) 228 //sysnb Getgid() (gid int) 229 //sysnb Getpgid(pid int) (pgid int, err error) 230 //sysnb Getpgrp() (pgrp int) 231 //sysnb Getpid() (pid int) 232 //sysnb Getppid() (ppid int) 233 //sys Getpriority(which int, who int) (prio int, err error) 234 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 235 //sysnb Getrusage(who int, rusage *Rusage) (err error) 236 //sysnb Getsid(pid int) (sid int, err error) 237 //sysnb Getuid() (uid int) 238 //sysnb Issetugid() (tainted bool) 239 //sys Kqueue() (fd int, err error) 240 //sys Lchown(path string, uid int, gid int) (err error) 241 //sys Link(path string, link string) (err error) 242 //sys Listen(s int, backlog int) (err error) 243 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 244 //sys Mkdir(path string, mode uint32) (err error) 245 //sys Mkfifo(path string, mode uint32) (err error) 246 //sys Mknod(path string, mode uint32, dev int) (err error) 247 //sys Mlock(b []byte) (err error) 248 //sys Mlockall(flags int) (err error) 249 //sys Mprotect(b []byte, prot int) (err error) 250 //sys Munlock(b []byte) (err error) 251 //sys Munlockall() (err error) 252 //sys Open(path string, mode int, perm uint32) (fd int, err error) 253 //sys Pathconf(path string, name int) (val int, err error) 254 //sys Pread(fd int, p []byte, offset int64) (n int, err error) 255 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) 256 //sys read(fd int, p []byte) (n int, err error) 257 //sys Readlink(path string, buf []byte) (n int, err error) 258 //sys Rename(from string, to string) (err error) 259 //sys Revoke(path string) (err error) 260 //sys Rmdir(path string) (err error) 261 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 262 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 263 //sys Setegid(egid int) (err error) 264 //sysnb Seteuid(euid int) (err error) 265 //sysnb Setgid(gid int) (err error) 266 //sys Setlogin(name string) (err error) 267 //sysnb Setpgid(pid int, pgid int) (err error) 268 //sys Setpriority(which int, who int, prio int) (err error) 269 //sys Setprivexec(flag int) (err error) 270 //sysnb Setregid(rgid int, egid int) (err error) 271 //sysnb Setreuid(ruid int, euid int) (err error) 272 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 273 //sysnb Setsid() (pid int, err error) 274 //sysnb Settimeofday(tp *Timeval) (err error) 275 //sysnb Setuid(uid int) (err error) 276 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 277 //sys Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64 278 //sys Symlink(path string, link string) (err error) 279 //sys Sync() (err error) 280 //sys Truncate(path string, length int64) (err error) 281 //sys Umask(newmask int) (oldmask int) 282 //sys Undelete(path string) (err error) 283 //sys Unlink(path string) (err error) 284 //sys Unmount(path string, flags int) (err error) 285 //sys write(fd int, p []byte) (n int, err error) 286 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 287 //sys munmap(addr uintptr, length uintptr) (err error) 288 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 289 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 290 291 /* 292 * Unimplemented 293 */ 294 // Profil 295 // Sigaction 296 // Sigprocmask 297 // Getlogin 298 // Sigpending 299 // Sigaltstack 300 // Ioctl 301 // Reboot 302 // Execve 303 // Vfork 304 // Sbrk 305 // Sstk 306 // Ovadvise 307 // Mincore 308 // Setitimer 309 // Swapon 310 // Select 311 // Sigsuspend 312 // Readv 313 // Writev 314 // Nfssvc 315 // Getfh 316 // Quotactl 317 // Mount 318 // Csops 319 // Waitid 320 // Add_profil 321 // Kdebug_trace 322 // Sigreturn 323 // Mmap 324 // Mlock 325 // Munlock 326 // Atsocket 327 // Kqueue_from_portset_np 328 // Kqueue_portset 329 // Getattrlist 330 // Setattrlist 331 // Getdirentriesattr 332 // Searchfs 333 // Delete 334 // Copyfile 335 // Poll 336 // Watchevent 337 // Waitevent 338 // Modwatch 339 // Getxattr 340 // Fgetxattr 341 // Setxattr 342 // Fsetxattr 343 // Removexattr 344 // Fremovexattr 345 // Listxattr 346 // Flistxattr 347 // Fsctl 348 // Initgroups 349 // Posix_spawn 350 // Nfsclnt 351 // Fhopen 352 // Minherit 353 // Semsys 354 // Msgsys 355 // Shmsys 356 // Semctl 357 // Semget 358 // Semop 359 // Msgctl 360 // Msgget 361 // Msgsnd 362 // Msgrcv 363 // Shmat 364 // Shmctl 365 // Shmdt 366 // Shmget 367 // Shm_open 368 // Shm_unlink 369 // Sem_open 370 // Sem_close 371 // Sem_unlink 372 // Sem_wait 373 // Sem_trywait 374 // Sem_post 375 // Sem_getvalue 376 // Sem_init 377 // Sem_destroy 378 // Open_extended 379 // Umask_extended 380 // Stat_extended 381 // Lstat_extended 382 // Fstat_extended 383 // Chmod_extended 384 // Fchmod_extended 385 // Access_extended 386 // Settid 387 // Gettid 388 // Setsgroups 389 // Getsgroups 390 // Setwgroups 391 // Getwgroups 392 // Mkfifo_extended 393 // Mkdir_extended 394 // Identitysvc 395 // Shared_region_check_np 396 // Shared_region_map_np 397 // __pthread_mutex_destroy 398 // __pthread_mutex_init 399 // __pthread_mutex_lock 400 // __pthread_mutex_trylock 401 // __pthread_mutex_unlock 402 // __pthread_cond_init 403 // __pthread_cond_destroy 404 // __pthread_cond_broadcast 405 // __pthread_cond_signal 406 // Setsid_with_pid 407 // __pthread_cond_timedwait 408 // Aio_fsync 409 // Aio_return 410 // Aio_suspend 411 // Aio_cancel 412 // Aio_error 413 // Aio_read 414 // Aio_write 415 // Lio_listio 416 // __pthread_cond_wait 417 // Iopolicysys 418 // Mlockall 419 // Munlockall 420 // __pthread_kill 421 // __pthread_sigmask 422 // __sigwait 423 // __disable_threadsignal 424 // __pthread_markcancel 425 // __pthread_canceled 426 // __semwait_signal 427 // Proc_info 428 // sendfile 429 // Stat64_extended 430 // Lstat64_extended 431 // Fstat64_extended 432 // __pthread_chdir 433 // __pthread_fchdir 434 // Audit 435 // Auditon 436 // Getauid 437 // Setauid 438 // Getaudit 439 // Setaudit 440 // Getaudit_addr 441 // Setaudit_addr 442 // Auditctl 443 // Bsdthread_create 444 // Bsdthread_terminate 445 // Stack_snapshot 446 // Bsdthread_register 447 // Workq_open 448 // Workq_ops 449 // __mac_execve 450 // __mac_syscall 451 // __mac_get_file 452 // __mac_set_file 453 // __mac_get_link 454 // __mac_set_link 455 // __mac_get_proc 456 // __mac_set_proc 457 // __mac_get_fd 458 // __mac_set_fd 459 // __mac_get_pid 460 // __mac_get_lcid 461 // __mac_get_lctx 462 // __mac_set_lctx 463 // Setlcid 464 // Read_nocancel 465 // Write_nocancel 466 // Open_nocancel 467 // Close_nocancel 468 // Wait4_nocancel 469 // Recvmsg_nocancel 470 // Sendmsg_nocancel 471 // Recvfrom_nocancel 472 // Accept_nocancel 473 // Msync_nocancel 474 // Fcntl_nocancel 475 // Select_nocancel 476 // Fsync_nocancel 477 // Connect_nocancel 478 // Sigsuspend_nocancel 479 // Readv_nocancel 480 // Writev_nocancel 481 // Sendto_nocancel 482 // Pread_nocancel 483 // Pwrite_nocancel 484 // Waitid_nocancel 485 // Poll_nocancel 486 // Msgsnd_nocancel 487 // Msgrcv_nocancel 488 // Sem_wait_nocancel 489 // Aio_suspend_nocancel 490 // __sigwait_nocancel 491 // __semwait_signal_nocancel 492 // __mac_mount 493 // __mac_get_mount 494 // __mac_getfsstat 495
