github.com/jgarto/itcv@v0.0.0-20180826224514-4eea09c1aa0d/_vendor/src/golang.org/x/sys/unix/syscall_freebsd.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 // FreeBSD 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 "unsafe" 16 17 type SockaddrDatalink struct { 18 Len uint8 19 Family uint8 20 Index uint16 21 Type uint8 22 Nlen uint8 23 Alen uint8 24 Slen uint8 25 Data [46]int8 26 raw RawSockaddrDatalink 27 } 28 29 // Translate "kern.hostname" to []_C_int{0,1,2,3}. 30 func nametomib(name string) (mib []_C_int, err error) { 31 const siz = unsafe.Sizeof(mib[0]) 32 33 // NOTE(rsc): It seems strange to set the buffer to have 34 // size CTL_MAXNAME+2 but use only CTL_MAXNAME 35 // as the size. I don't know why the +2 is here, but the 36 // kernel uses +2 for its own implementation of this function. 37 // I am scared that if we don't include the +2 here, the kernel 38 // will silently write 2 words farther than we specify 39 // and we'll get memory corruption. 40 var buf [CTL_MAXNAME + 2]_C_int 41 n := uintptr(CTL_MAXNAME) * siz 42 43 p := (*byte)(unsafe.Pointer(&buf[0])) 44 bytes, err := ByteSliceFromString(name) 45 if err != nil { 46 return nil, err 47 } 48 49 // Magic sysctl: "setting" 0.3 to a string name 50 // lets you read back the array of integers form. 51 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { 52 return nil, err 53 } 54 return buf[0 : n/siz], nil 55 } 56 57 func direntIno(buf []byte) (uint64, bool) { 58 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno)) 59 } 60 61 func direntReclen(buf []byte) (uint64, bool) { 62 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) 63 } 64 65 func direntNamlen(buf []byte) (uint64, bool) { 66 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) 67 } 68 69 //sysnb pipe() (r int, w int, err error) 70 71 func Pipe(p []int) (err error) { 72 if len(p) != 2 { 73 return EINVAL 74 } 75 p[0], p[1], err = pipe() 76 return 77 } 78 79 func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) { 80 var value IPMreqn 81 vallen := _Socklen(SizeofIPMreqn) 82 errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 83 return &value, errno 84 } 85 86 func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) { 87 return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq)) 88 } 89 90 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { 91 var rsa RawSockaddrAny 92 var len _Socklen = SizeofSockaddrAny 93 nfd, err = accept4(fd, &rsa, &len, flags) 94 if err != nil { 95 return 96 } 97 if len > SizeofSockaddrAny { 98 panic("RawSockaddrAny too small") 99 } 100 sa, err = anyToSockaddr(&rsa) 101 if err != nil { 102 Close(nfd) 103 nfd = 0 104 } 105 return 106 } 107 108 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 109 var _p0 unsafe.Pointer 110 var bufsize uintptr 111 if len(buf) > 0 { 112 _p0 = unsafe.Pointer(&buf[0]) 113 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 114 } 115 r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) 116 n = int(r0) 117 if e1 != 0 { 118 err = e1 119 } 120 return 121 } 122 123 // Derive extattr namespace and attribute name 124 125 func xattrnamespace(fullattr string) (ns int, attr string, err error) { 126 s := -1 127 for idx, val := range fullattr { 128 if val == '.' { 129 s = idx 130 break 131 } 132 } 133 134 if s == -1 { 135 return -1, "", ENOATTR 136 } 137 138 namespace := fullattr[0:s] 139 attr = fullattr[s+1:] 140 141 switch namespace { 142 case "user": 143 return EXTATTR_NAMESPACE_USER, attr, nil 144 case "system": 145 return EXTATTR_NAMESPACE_SYSTEM, attr, nil 146 default: 147 return -1, "", ENOATTR 148 } 149 } 150 151 func initxattrdest(dest []byte, idx int) (d unsafe.Pointer) { 152 if len(dest) > idx { 153 return unsafe.Pointer(&dest[idx]) 154 } else { 155 return unsafe.Pointer(_zero) 156 } 157 } 158 159 // FreeBSD implements its own syscalls to handle extended attributes 160 161 func Getxattr(file string, attr string, dest []byte) (sz int, err error) { 162 d := initxattrdest(dest, 0) 163 destsize := len(dest) 164 165 nsid, a, err := xattrnamespace(attr) 166 if err != nil { 167 return -1, err 168 } 169 170 return ExtattrGetFile(file, nsid, a, uintptr(d), destsize) 171 } 172 173 func Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) { 174 d := initxattrdest(dest, 0) 175 destsize := len(dest) 176 177 nsid, a, err := xattrnamespace(attr) 178 if err != nil { 179 return -1, err 180 } 181 182 return ExtattrGetFd(fd, nsid, a, uintptr(d), destsize) 183 } 184 185 func Lgetxattr(link string, attr string, dest []byte) (sz int, err error) { 186 d := initxattrdest(dest, 0) 187 destsize := len(dest) 188 189 nsid, a, err := xattrnamespace(attr) 190 if err != nil { 191 return -1, err 192 } 193 194 return ExtattrGetLink(link, nsid, a, uintptr(d), destsize) 195 } 196 197 // flags are unused on FreeBSD 198 199 func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) { 200 d := unsafe.Pointer(&data[0]) 201 datasiz := len(data) 202 203 nsid, a, err := xattrnamespace(attr) 204 if err != nil { 205 return 206 } 207 208 _, err = ExtattrSetFd(fd, nsid, a, uintptr(d), datasiz) 209 return 210 } 211 212 func Setxattr(file string, attr string, data []byte, flags int) (err error) { 213 d := unsafe.Pointer(&data[0]) 214 datasiz := len(data) 215 216 nsid, a, err := xattrnamespace(attr) 217 if err != nil { 218 return 219 } 220 221 _, err = ExtattrSetFile(file, nsid, a, uintptr(d), datasiz) 222 return 223 } 224 225 func Lsetxattr(link string, attr string, data []byte, flags int) (err error) { 226 d := unsafe.Pointer(&data[0]) 227 datasiz := len(data) 228 229 nsid, a, err := xattrnamespace(attr) 230 if err != nil { 231 return 232 } 233 234 _, err = ExtattrSetLink(link, nsid, a, uintptr(d), datasiz) 235 return 236 } 237 238 func Removexattr(file string, attr string) (err error) { 239 nsid, a, err := xattrnamespace(attr) 240 if err != nil { 241 return 242 } 243 244 err = ExtattrDeleteFile(file, nsid, a) 245 return 246 } 247 248 func Fremovexattr(fd int, attr string) (err error) { 249 nsid, a, err := xattrnamespace(attr) 250 if err != nil { 251 return 252 } 253 254 err = ExtattrDeleteFd(fd, nsid, a) 255 return 256 } 257 258 func Lremovexattr(link string, attr string) (err error) { 259 nsid, a, err := xattrnamespace(attr) 260 if err != nil { 261 return 262 } 263 264 err = ExtattrDeleteLink(link, nsid, a) 265 return 266 } 267 268 func Listxattr(file string, dest []byte) (sz int, err error) { 269 d := initxattrdest(dest, 0) 270 destsiz := len(dest) 271 272 // FreeBSD won't allow you to list xattrs from multiple namespaces 273 s := 0 274 var e error 275 for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { 276 stmp, e := ExtattrListFile(file, nsid, uintptr(d), destsiz) 277 278 /* Errors accessing system attrs are ignored so that 279 * we can implement the Linux-like behavior of omitting errors that 280 * we don't have read permissions on 281 * 282 * Linux will still error if we ask for user attributes on a file that 283 * we don't have read permissions on, so don't ignore those errors 284 */ 285 if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { 286 e = nil 287 continue 288 } else if e != nil { 289 return s, e 290 } 291 292 s += stmp 293 destsiz -= s 294 if destsiz < 0 { 295 destsiz = 0 296 } 297 d = initxattrdest(dest, s) 298 } 299 300 return s, e 301 } 302 303 func Flistxattr(fd int, dest []byte) (sz int, err error) { 304 d := initxattrdest(dest, 0) 305 destsiz := len(dest) 306 307 s := 0 308 var e error 309 for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { 310 stmp, e := ExtattrListFd(fd, nsid, uintptr(d), destsiz) 311 if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { 312 e = nil 313 continue 314 } else if e != nil { 315 return s, e 316 } 317 318 s += stmp 319 destsiz -= s 320 if destsiz < 0 { 321 destsiz = 0 322 } 323 d = initxattrdest(dest, s) 324 } 325 326 return s, e 327 } 328 329 func Llistxattr(link string, dest []byte) (sz int, err error) { 330 d := initxattrdest(dest, 0) 331 destsiz := len(dest) 332 333 s := 0 334 var e error 335 for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { 336 stmp, e := ExtattrListLink(link, nsid, uintptr(d), destsiz) 337 if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { 338 e = nil 339 continue 340 } else if e != nil { 341 return s, e 342 } 343 344 s += stmp 345 destsiz -= s 346 if destsiz < 0 { 347 destsiz = 0 348 } 349 d = initxattrdest(dest, s) 350 } 351 352 return s, e 353 } 354 355 /* 356 * Exposed directly 357 */ 358 //sys Access(path string, mode uint32) (err error) 359 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 360 //sys Chdir(path string) (err error) 361 //sys Chflags(path string, flags int) (err error) 362 //sys Chmod(path string, mode uint32) (err error) 363 //sys Chown(path string, uid int, gid int) (err error) 364 //sys Chroot(path string) (err error) 365 //sys Close(fd int) (err error) 366 //sys Dup(fd int) (nfd int, err error) 367 //sys Dup2(from int, to int) (err error) 368 //sys Exit(code int) 369 //sys ExtattrGetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 370 //sys ExtattrSetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 371 //sys ExtattrDeleteFd(fd int, attrnamespace int, attrname string) (err error) 372 //sys ExtattrListFd(fd int, attrnamespace int, data uintptr, nbytes int) (ret int, err error) 373 //sys ExtattrGetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 374 //sys ExtattrSetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 375 //sys ExtattrDeleteFile(file string, attrnamespace int, attrname string) (err error) 376 //sys ExtattrListFile(file string, attrnamespace int, data uintptr, nbytes int) (ret int, err error) 377 //sys ExtattrGetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 378 //sys ExtattrSetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 379 //sys ExtattrDeleteLink(link string, attrnamespace int, attrname string) (err error) 380 //sys ExtattrListLink(link string, attrnamespace int, data uintptr, nbytes int) (ret int, err error) 381 //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_POSIX_FADVISE 382 //sys Fchdir(fd int) (err error) 383 //sys Fchflags(fd int, flags int) (err error) 384 //sys Fchmod(fd int, mode uint32) (err error) 385 //sys Fchown(fd int, uid int, gid int) (err error) 386 //sys Flock(fd int, how int) (err error) 387 //sys Fpathconf(fd int, name int) (val int, err error) 388 //sys Fstat(fd int, stat *Stat_t) (err error) 389 //sys Fstatfs(fd int, stat *Statfs_t) (err error) 390 //sys Fsync(fd int) (err error) 391 //sys Ftruncate(fd int, length int64) (err error) 392 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) 393 //sys Getdtablesize() (size int) 394 //sysnb Getegid() (egid int) 395 //sysnb Geteuid() (uid int) 396 //sysnb Getgid() (gid int) 397 //sysnb Getpgid(pid int) (pgid int, err error) 398 //sysnb Getpgrp() (pgrp int) 399 //sysnb Getpid() (pid int) 400 //sysnb Getppid() (ppid int) 401 //sys Getpriority(which int, who int) (prio int, err error) 402 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 403 //sysnb Getrusage(who int, rusage *Rusage) (err error) 404 //sysnb Getsid(pid int) (sid int, err error) 405 //sysnb Gettimeofday(tv *Timeval) (err error) 406 //sysnb Getuid() (uid int) 407 //sys Issetugid() (tainted bool) 408 //sys Kill(pid int, signum syscall.Signal) (err error) 409 //sys Kqueue() (fd int, err error) 410 //sys Lchown(path string, uid int, gid int) (err error) 411 //sys Link(path string, link string) (err error) 412 //sys Listen(s int, backlog int) (err error) 413 //sys Lstat(path string, stat *Stat_t) (err error) 414 //sys Mkdir(path string, mode uint32) (err error) 415 //sys Mkfifo(path string, mode uint32) (err error) 416 //sys Mknod(path string, mode uint32, dev int) (err error) 417 //sys Mlock(b []byte) (err error) 418 //sys Mlockall(flags int) (err error) 419 //sys Mprotect(b []byte, prot int) (err error) 420 //sys Munlock(b []byte) (err error) 421 //sys Munlockall() (err error) 422 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) 423 //sys Open(path string, mode int, perm uint32) (fd int, err error) 424 //sys Pathconf(path string, name int) (val int, err error) 425 //sys Pread(fd int, p []byte, offset int64) (n int, err error) 426 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) 427 //sys read(fd int, p []byte) (n int, err error) 428 //sys Readlink(path string, buf []byte) (n int, err error) 429 //sys Rename(from string, to string) (err error) 430 //sys Revoke(path string) (err error) 431 //sys Rmdir(path string) (err error) 432 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 433 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 434 //sysnb Setegid(egid int) (err error) 435 //sysnb Seteuid(euid int) (err error) 436 //sysnb Setgid(gid int) (err error) 437 //sys Setlogin(name string) (err error) 438 //sysnb Setpgid(pid int, pgid int) (err error) 439 //sys Setpriority(which int, who int, prio int) (err error) 440 //sysnb Setregid(rgid int, egid int) (err error) 441 //sysnb Setreuid(ruid int, euid int) (err error) 442 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) 443 //sysnb Setresuid(ruid int, euid int, suid int) (err error) 444 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 445 //sysnb Setsid() (pid int, err error) 446 //sysnb Settimeofday(tp *Timeval) (err error) 447 //sysnb Setuid(uid int) (err error) 448 //sys Stat(path string, stat *Stat_t) (err error) 449 //sys Statfs(path string, stat *Statfs_t) (err error) 450 //sys Symlink(path string, link string) (err error) 451 //sys Sync() (err error) 452 //sys Truncate(path string, length int64) (err error) 453 //sys Umask(newmask int) (oldmask int) 454 //sys Undelete(path string) (err error) 455 //sys Unlink(path string) (err error) 456 //sys Unmount(path string, flags int) (err error) 457 //sys write(fd int, p []byte) (n int, err error) 458 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 459 //sys munmap(addr uintptr, length uintptr) (err error) 460 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 461 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 462 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) 463 464 /* 465 * Unimplemented 466 */ 467 // Profil 468 // Sigaction 469 // Sigprocmask 470 // Getlogin 471 // Sigpending 472 // Sigaltstack 473 // Ioctl 474 // Reboot 475 // Execve 476 // Vfork 477 // Sbrk 478 // Sstk 479 // Ovadvise 480 // Mincore 481 // Setitimer 482 // Swapon 483 // Select 484 // Sigsuspend 485 // Readv 486 // Writev 487 // Nfssvc 488 // Getfh 489 // Quotactl 490 // Mount 491 // Csops 492 // Waitid 493 // Add_profil 494 // Kdebug_trace 495 // Sigreturn 496 // Mmap 497 // Mlock 498 // Munlock 499 // Atsocket 500 // Kqueue_from_portset_np 501 // Kqueue_portset 502 // Getattrlist 503 // Setattrlist 504 // Getdirentriesattr 505 // Searchfs 506 // Delete 507 // Copyfile 508 // Poll 509 // Watchevent 510 // Waitevent 511 // Modwatch 512 // Getxattr 513 // Fgetxattr 514 // Setxattr 515 // Fsetxattr 516 // Removexattr 517 // Fremovexattr 518 // Listxattr 519 // Flistxattr 520 // Fsctl 521 // Initgroups 522 // Posix_spawn 523 // Nfsclnt 524 // Fhopen 525 // Minherit 526 // Semsys 527 // Msgsys 528 // Shmsys 529 // Semctl 530 // Semget 531 // Semop 532 // Msgctl 533 // Msgget 534 // Msgsnd 535 // Msgrcv 536 // Shmat 537 // Shmctl 538 // Shmdt 539 // Shmget 540 // Shm_open 541 // Shm_unlink 542 // Sem_open 543 // Sem_close 544 // Sem_unlink 545 // Sem_wait 546 // Sem_trywait 547 // Sem_post 548 // Sem_getvalue 549 // Sem_init 550 // Sem_destroy 551 // Open_extended 552 // Umask_extended 553 // Stat_extended 554 // Lstat_extended 555 // Fstat_extended 556 // Chmod_extended 557 // Fchmod_extended 558 // Access_extended 559 // Settid 560 // Gettid 561 // Setsgroups 562 // Getsgroups 563 // Setwgroups 564 // Getwgroups 565 // Mkfifo_extended 566 // Mkdir_extended 567 // Identitysvc 568 // Shared_region_check_np 569 // Shared_region_map_np 570 // __pthread_mutex_destroy 571 // __pthread_mutex_init 572 // __pthread_mutex_lock 573 // __pthread_mutex_trylock 574 // __pthread_mutex_unlock 575 // __pthread_cond_init 576 // __pthread_cond_destroy 577 // __pthread_cond_broadcast 578 // __pthread_cond_signal 579 // Setsid_with_pid 580 // __pthread_cond_timedwait 581 // Aio_fsync 582 // Aio_return 583 // Aio_suspend 584 // Aio_cancel 585 // Aio_error 586 // Aio_read 587 // Aio_write 588 // Lio_listio 589 // __pthread_cond_wait 590 // Iopolicysys 591 // Mlockall 592 // Munlockall 593 // __pthread_kill 594 // __pthread_sigmask 595 // __sigwait 596 // __disable_threadsignal 597 // __pthread_markcancel 598 // __pthread_canceled 599 // __semwait_signal 600 // Proc_info 601 // Stat64_extended 602 // Lstat64_extended 603 // Fstat64_extended 604 // __pthread_chdir 605 // __pthread_fchdir 606 // Audit 607 // Auditon 608 // Getauid 609 // Setauid 610 // Getaudit 611 // Setaudit 612 // Getaudit_addr 613 // Setaudit_addr 614 // Auditctl 615 // Bsdthread_create 616 // Bsdthread_terminate 617 // Stack_snapshot 618 // Bsdthread_register 619 // Workq_open 620 // Workq_ops 621 // __mac_execve 622 // __mac_syscall 623 // __mac_get_file 624 // __mac_set_file 625 // __mac_get_link 626 // __mac_set_link 627 // __mac_get_proc 628 // __mac_set_proc 629 // __mac_get_fd 630 // __mac_set_fd 631 // __mac_get_pid 632 // __mac_get_lcid 633 // __mac_get_lctx 634 // __mac_set_lctx 635 // Setlcid 636 // Read_nocancel 637 // Write_nocancel 638 // Open_nocancel 639 // Close_nocancel 640 // Wait4_nocancel 641 // Recvmsg_nocancel 642 // Sendmsg_nocancel 643 // Recvfrom_nocancel 644 // Accept_nocancel 645 // Msync_nocancel 646 // Fcntl_nocancel 647 // Select_nocancel 648 // Fsync_nocancel 649 // Connect_nocancel 650 // Sigsuspend_nocancel 651 // Readv_nocancel 652 // Writev_nocancel 653 // Sendto_nocancel 654 // Pread_nocancel 655 // Pwrite_nocancel 656 // Waitid_nocancel 657 // Poll_nocancel 658 // Msgsnd_nocancel 659 // Msgrcv_nocancel 660 // Sem_wait_nocancel 661 // Aio_suspend_nocancel 662 // __sigwait_nocancel 663 // __semwait_signal_nocancel 664 // __mac_mount 665 // __mac_get_mount 666 // __mac_getfsstat