github.com/maenmax/kairep@v0.0.0-20210218001208-55bf3df36788/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 // ParseDirent parses up to max directory entries in buf, 80 // appending the names to names. It returns the number 81 // bytes consumed from buf, the number of entries added 82 // to names, and the new names slice. 83 func ParseDirent(buf []byte, max int, names []string) (consumed int, count int, newnames []string) { 84 origlen := len(buf) 85 for max != 0 && len(buf) > 0 { 86 dirent := (*Dirent)(unsafe.Pointer(&buf[0])) 87 if dirent.Reclen == 0 { 88 buf = nil 89 break 90 } 91 buf = buf[dirent.Reclen:] 92 if dirent.Ino == 0 { // File absent in directory. 93 continue 94 } 95 bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0])) 96 var name = string(bytes[0:dirent.Namlen]) 97 if name == "." || name == ".." { // Useless names 98 continue 99 } 100 max-- 101 count++ 102 names = append(names, name) 103 } 104 return origlen - len(buf), count, names 105 } 106 107 //sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error) 108 func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) } 109 func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) } 110 111 const ( 112 attrBitMapCount = 5 113 attrCmnFullpath = 0x08000000 114 ) 115 116 type attrList struct { 117 bitmapCount uint16 118 _ uint16 119 CommonAttr uint32 120 VolAttr uint32 121 DirAttr uint32 122 FileAttr uint32 123 Forkattr uint32 124 } 125 126 func getAttrList(path string, attrList attrList, attrBuf []byte, options uint) (attrs [][]byte, err error) { 127 if len(attrBuf) < 4 { 128 return nil, errorspkg.New("attrBuf too small") 129 } 130 attrList.bitmapCount = attrBitMapCount 131 132 var _p0 *byte 133 _p0, err = BytePtrFromString(path) 134 if err != nil { 135 return nil, err 136 } 137 138 _, _, e1 := Syscall6( 139 SYS_GETATTRLIST, 140 uintptr(unsafe.Pointer(_p0)), 141 uintptr(unsafe.Pointer(&attrList)), 142 uintptr(unsafe.Pointer(&attrBuf[0])), 143 uintptr(len(attrBuf)), 144 uintptr(options), 145 0, 146 ) 147 use(unsafe.Pointer(_p0)) 148 if e1 != 0 { 149 return nil, e1 150 } 151 size := *(*uint32)(unsafe.Pointer(&attrBuf[0])) 152 153 // dat is the section of attrBuf that contains valid data, 154 // without the 4 byte length header. All attribute offsets 155 // are relative to dat. 156 dat := attrBuf 157 if int(size) < len(attrBuf) { 158 dat = dat[:size] 159 } 160 dat = dat[4:] // remove length prefix 161 162 for i := uint32(0); int(i) < len(dat); { 163 header := dat[i:] 164 if len(header) < 8 { 165 return attrs, errorspkg.New("truncated attribute header") 166 } 167 datOff := *(*int32)(unsafe.Pointer(&header[0])) 168 attrLen := *(*uint32)(unsafe.Pointer(&header[4])) 169 if datOff < 0 || uint32(datOff)+attrLen > uint32(len(dat)) { 170 return attrs, errorspkg.New("truncated results; attrBuf too small") 171 } 172 end := uint32(datOff) + attrLen 173 attrs = append(attrs, dat[datOff:end]) 174 i = end 175 if r := i % 4; r != 0 { 176 i += (4 - r) 177 } 178 } 179 return 180 } 181 182 //sysnb pipe() (r int, w int, err error) 183 184 func Pipe(p []int) (err error) { 185 if len(p) != 2 { 186 return EINVAL 187 } 188 p[0], p[1], err = pipe() 189 return 190 } 191 192 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 193 var _p0 unsafe.Pointer 194 var bufsize uintptr 195 if len(buf) > 0 { 196 _p0 = unsafe.Pointer(&buf[0]) 197 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 198 } 199 r0, _, e1 := Syscall(SYS_GETFSSTAT64, uintptr(_p0), bufsize, uintptr(flags)) 200 use(unsafe.Pointer(_p0)) 201 n = int(r0) 202 if e1 != 0 { 203 err = e1 204 } 205 return 206 } 207 208 /* 209 * Wrapped 210 */ 211 212 //sys kill(pid int, signum int, posix int) (err error) 213 214 func Kill(pid int, signum syscall.Signal) (err error) { return kill(pid, int(signum), 1) } 215 216 /* 217 * Exposed directly 218 */ 219 //sys Access(path string, mode uint32) (err error) 220 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 221 //sys Chdir(path string) (err error) 222 //sys Chflags(path string, flags int) (err error) 223 //sys Chmod(path string, mode uint32) (err error) 224 //sys Chown(path string, uid int, gid int) (err error) 225 //sys Chroot(path string) (err error) 226 //sys Close(fd int) (err error) 227 //sys Dup(fd int) (nfd int, err error) 228 //sys Dup2(from int, to int) (err error) 229 //sys Exchangedata(path1 string, path2 string, options int) (err error) 230 //sys Exit(code int) 231 //sys Fchdir(fd int) (err error) 232 //sys Fchflags(fd int, flags int) (err error) 233 //sys Fchmod(fd int, mode uint32) (err error) 234 //sys Fchown(fd int, uid int, gid int) (err error) 235 //sys Flock(fd int, how int) (err error) 236 //sys Fpathconf(fd int, name int) (val int, err error) 237 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 238 //sys Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64 239 //sys Fsync(fd int) (err error) 240 //sys Ftruncate(fd int, length int64) (err error) 241 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64 242 //sys Getdtablesize() (size int) 243 //sysnb Getegid() (egid int) 244 //sysnb Geteuid() (uid int) 245 //sysnb Getgid() (gid int) 246 //sysnb Getpgid(pid int) (pgid int, err error) 247 //sysnb Getpgrp() (pgrp int) 248 //sysnb Getpid() (pid int) 249 //sysnb Getppid() (ppid int) 250 //sys Getpriority(which int, who int) (prio int, err error) 251 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 252 //sysnb Getrusage(who int, rusage *Rusage) (err error) 253 //sysnb Getsid(pid int) (sid int, err error) 254 //sysnb Getuid() (uid int) 255 //sysnb Issetugid() (tainted bool) 256 //sys Kqueue() (fd int, err error) 257 //sys Lchown(path string, uid int, gid int) (err error) 258 //sys Link(path string, link string) (err error) 259 //sys Listen(s int, backlog int) (err error) 260 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 261 //sys Mkdir(path string, mode uint32) (err error) 262 //sys Mkfifo(path string, mode uint32) (err error) 263 //sys Mknod(path string, mode uint32, dev int) (err error) 264 //sys Mlock(b []byte) (err error) 265 //sys Mlockall(flags int) (err error) 266 //sys Mprotect(b []byte, prot int) (err error) 267 //sys Munlock(b []byte) (err error) 268 //sys Munlockall() (err error) 269 //sys Open(path string, mode int, perm uint32) (fd int, err error) 270 //sys Pathconf(path string, name int) (val int, err error) 271 //sys Pread(fd int, p []byte, offset int64) (n int, err error) 272 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) 273 //sys read(fd int, p []byte) (n int, err error) 274 //sys Readlink(path string, buf []byte) (n int, err error) 275 //sys Rename(from string, to string) (err error) 276 //sys Revoke(path string) (err error) 277 //sys Rmdir(path string) (err error) 278 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 279 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 280 //sys Setegid(egid int) (err error) 281 //sysnb Seteuid(euid int) (err error) 282 //sysnb Setgid(gid int) (err error) 283 //sys Setlogin(name string) (err error) 284 //sysnb Setpgid(pid int, pgid int) (err error) 285 //sys Setpriority(which int, who int, prio int) (err error) 286 //sys Setprivexec(flag int) (err error) 287 //sysnb Setregid(rgid int, egid int) (err error) 288 //sysnb Setreuid(ruid int, euid int) (err error) 289 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 290 //sysnb Setsid() (pid int, err error) 291 //sysnb Settimeofday(tp *Timeval) (err error) 292 //sysnb Setuid(uid int) (err error) 293 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 294 //sys Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64 295 //sys Symlink(path string, link string) (err error) 296 //sys Sync() (err error) 297 //sys Truncate(path string, length int64) (err error) 298 //sys Umask(newmask int) (oldmask int) 299 //sys Undelete(path string) (err error) 300 //sys Unlink(path string) (err error) 301 //sys Unmount(path string, flags int) (err error) 302 //sys write(fd int, p []byte) (n int, err error) 303 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 304 //sys munmap(addr uintptr, length uintptr) (err error) 305 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 306 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 307 308 /* 309 * Unimplemented 310 */ 311 // Profil 312 // Sigaction 313 // Sigprocmask 314 // Getlogin 315 // Sigpending 316 // Sigaltstack 317 // Ioctl 318 // Reboot 319 // Execve 320 // Vfork 321 // Sbrk 322 // Sstk 323 // Ovadvise 324 // Mincore 325 // Setitimer 326 // Swapon 327 // Select 328 // Sigsuspend 329 // Readv 330 // Writev 331 // Nfssvc 332 // Getfh 333 // Quotactl 334 // Mount 335 // Csops 336 // Waitid 337 // Add_profil 338 // Kdebug_trace 339 // Sigreturn 340 // Mmap 341 // Mlock 342 // Munlock 343 // Atsocket 344 // Kqueue_from_portset_np 345 // Kqueue_portset 346 // Getattrlist 347 // Setattrlist 348 // Getdirentriesattr 349 // Searchfs 350 // Delete 351 // Copyfile 352 // Poll 353 // Watchevent 354 // Waitevent 355 // Modwatch 356 // Getxattr 357 // Fgetxattr 358 // Setxattr 359 // Fsetxattr 360 // Removexattr 361 // Fremovexattr 362 // Listxattr 363 // Flistxattr 364 // Fsctl 365 // Initgroups 366 // Posix_spawn 367 // Nfsclnt 368 // Fhopen 369 // Minherit 370 // Semsys 371 // Msgsys 372 // Shmsys 373 // Semctl 374 // Semget 375 // Semop 376 // Msgctl 377 // Msgget 378 // Msgsnd 379 // Msgrcv 380 // Shmat 381 // Shmctl 382 // Shmdt 383 // Shmget 384 // Shm_open 385 // Shm_unlink 386 // Sem_open 387 // Sem_close 388 // Sem_unlink 389 // Sem_wait 390 // Sem_trywait 391 // Sem_post 392 // Sem_getvalue 393 // Sem_init 394 // Sem_destroy 395 // Open_extended 396 // Umask_extended 397 // Stat_extended 398 // Lstat_extended 399 // Fstat_extended 400 // Chmod_extended 401 // Fchmod_extended 402 // Access_extended 403 // Settid 404 // Gettid 405 // Setsgroups 406 // Getsgroups 407 // Setwgroups 408 // Getwgroups 409 // Mkfifo_extended 410 // Mkdir_extended 411 // Identitysvc 412 // Shared_region_check_np 413 // Shared_region_map_np 414 // __pthread_mutex_destroy 415 // __pthread_mutex_init 416 // __pthread_mutex_lock 417 // __pthread_mutex_trylock 418 // __pthread_mutex_unlock 419 // __pthread_cond_init 420 // __pthread_cond_destroy 421 // __pthread_cond_broadcast 422 // __pthread_cond_signal 423 // Setsid_with_pid 424 // __pthread_cond_timedwait 425 // Aio_fsync 426 // Aio_return 427 // Aio_suspend 428 // Aio_cancel 429 // Aio_error 430 // Aio_read 431 // Aio_write 432 // Lio_listio 433 // __pthread_cond_wait 434 // Iopolicysys 435 // Mlockall 436 // Munlockall 437 // __pthread_kill 438 // __pthread_sigmask 439 // __sigwait 440 // __disable_threadsignal 441 // __pthread_markcancel 442 // __pthread_canceled 443 // __semwait_signal 444 // Proc_info 445 // sendfile 446 // Stat64_extended 447 // Lstat64_extended 448 // Fstat64_extended 449 // __pthread_chdir 450 // __pthread_fchdir 451 // Audit 452 // Auditon 453 // Getauid 454 // Setauid 455 // Getaudit 456 // Setaudit 457 // Getaudit_addr 458 // Setaudit_addr 459 // Auditctl 460 // Bsdthread_create 461 // Bsdthread_terminate 462 // Stack_snapshot 463 // Bsdthread_register 464 // Workq_open 465 // Workq_ops 466 // __mac_execve 467 // __mac_syscall 468 // __mac_get_file 469 // __mac_set_file 470 // __mac_get_link 471 // __mac_set_link 472 // __mac_get_proc 473 // __mac_set_proc 474 // __mac_get_fd 475 // __mac_set_fd 476 // __mac_get_pid 477 // __mac_get_lcid 478 // __mac_get_lctx 479 // __mac_set_lctx 480 // Setlcid 481 // Read_nocancel 482 // Write_nocancel 483 // Open_nocancel 484 // Close_nocancel 485 // Wait4_nocancel 486 // Recvmsg_nocancel 487 // Sendmsg_nocancel 488 // Recvfrom_nocancel 489 // Accept_nocancel 490 // Msync_nocancel 491 // Fcntl_nocancel 492 // Select_nocancel 493 // Fsync_nocancel 494 // Connect_nocancel 495 // Sigsuspend_nocancel 496 // Readv_nocancel 497 // Writev_nocancel 498 // Sendto_nocancel 499 // Pread_nocancel 500 // Pwrite_nocancel 501 // Waitid_nocancel 502 // Poll_nocancel 503 // Msgsnd_nocancel 504 // Msgrcv_nocancel 505 // Sem_wait_nocancel 506 // Aio_suspend_nocancel 507 // __sigwait_nocancel 508 // __semwait_signal_nocancel 509 // __mac_mount 510 // __mac_get_mount 511 // __mac_getfsstat