github.com/mfpierre/corectl@v0.5.6/Godeps/_workspace/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 // ParseDirent parses up to max directory entries in buf, 58 // appending the names to names. It returns the number 59 // bytes consumed from buf, the number of entries added 60 // to names, and the new names slice. 61 func ParseDirent(buf []byte, max int, names []string) (consumed int, count int, newnames []string) { 62 origlen := len(buf) 63 for max != 0 && len(buf) > 0 { 64 dirent := (*Dirent)(unsafe.Pointer(&buf[0])) 65 if dirent.Reclen == 0 { 66 buf = nil 67 break 68 } 69 buf = buf[dirent.Reclen:] 70 if dirent.Fileno == 0 { // File absent in directory. 71 continue 72 } 73 bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0])) 74 var name = string(bytes[0:dirent.Namlen]) 75 if name == "." || name == ".." { // Useless names 76 continue 77 } 78 max-- 79 count++ 80 names = append(names, name) 81 } 82 return origlen - len(buf), count, names 83 } 84 85 //sysnb pipe() (r int, w int, err error) 86 87 func Pipe(p []int) (err error) { 88 if len(p) != 2 { 89 return EINVAL 90 } 91 p[0], p[1], err = pipe() 92 return 93 } 94 95 func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) { 96 var value IPMreqn 97 vallen := _Socklen(SizeofIPMreqn) 98 errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) 99 return &value, errno 100 } 101 102 func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) { 103 return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq)) 104 } 105 106 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { 107 var rsa RawSockaddrAny 108 var len _Socklen = SizeofSockaddrAny 109 nfd, err = accept4(fd, &rsa, &len, flags) 110 if err != nil { 111 return 112 } 113 if len > SizeofSockaddrAny { 114 panic("RawSockaddrAny too small") 115 } 116 sa, err = anyToSockaddr(&rsa) 117 if err != nil { 118 Close(nfd) 119 nfd = 0 120 } 121 return 122 } 123 124 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 125 var _p0 unsafe.Pointer 126 var bufsize uintptr 127 if len(buf) > 0 { 128 _p0 = unsafe.Pointer(&buf[0]) 129 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 130 } 131 r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) 132 n = int(r0) 133 if e1 != 0 { 134 err = e1 135 } 136 return 137 } 138 139 // Derive extattr namespace and attribute name 140 141 func xattrnamespace(fullattr string) (ns int, attr string, err error) { 142 s := -1 143 for idx, val := range fullattr { 144 if val == '.' { 145 s = idx 146 break 147 } 148 } 149 150 if s == -1 { 151 return -1, "", ENOATTR 152 } 153 154 namespace := fullattr[0:s] 155 attr = fullattr[s+1:] 156 157 switch namespace { 158 case "user": 159 return EXTATTR_NAMESPACE_USER, attr, nil 160 case "system": 161 return EXTATTR_NAMESPACE_SYSTEM, attr, nil 162 default: 163 return -1, "", ENOATTR 164 } 165 } 166 167 func initxattrdest(dest []byte, idx int) (d unsafe.Pointer) { 168 if len(dest) > idx { 169 return unsafe.Pointer(&dest[idx]) 170 } else { 171 return unsafe.Pointer(_zero) 172 } 173 } 174 175 // FreeBSD implements its own syscalls to handle extended attributes 176 177 func Getxattr(file string, attr string, dest []byte) (sz int, err error) { 178 d := initxattrdest(dest, 0) 179 destsize := len(dest) 180 181 nsid, a, err := xattrnamespace(attr) 182 if err != nil { 183 return -1, err 184 } 185 186 return ExtattrGetFile(file, nsid, a, uintptr(d), destsize) 187 } 188 189 func Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) { 190 d := initxattrdest(dest, 0) 191 destsize := len(dest) 192 193 nsid, a, err := xattrnamespace(attr) 194 if err != nil { 195 return -1, err 196 } 197 198 return ExtattrGetFd(fd, nsid, a, uintptr(d), destsize) 199 } 200 201 func Lgetxattr(link string, attr string, dest []byte) (sz int, err error) { 202 d := initxattrdest(dest, 0) 203 destsize := len(dest) 204 205 nsid, a, err := xattrnamespace(attr) 206 if err != nil { 207 return -1, err 208 } 209 210 return ExtattrGetLink(link, nsid, a, uintptr(d), destsize) 211 } 212 213 // flags are unused on FreeBSD 214 215 func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) { 216 d := unsafe.Pointer(&data[0]) 217 datasiz := len(data) 218 219 nsid, a, err := xattrnamespace(attr) 220 if err != nil { 221 return 222 } 223 224 _, err = ExtattrSetFd(fd, nsid, a, uintptr(d), datasiz) 225 return 226 } 227 228 func Setxattr(file string, attr string, data []byte, flags int) (err error) { 229 d := unsafe.Pointer(&data[0]) 230 datasiz := len(data) 231 232 nsid, a, err := xattrnamespace(attr) 233 if err != nil { 234 return 235 } 236 237 _, err = ExtattrSetFile(file, nsid, a, uintptr(d), datasiz) 238 return 239 } 240 241 func Lsetxattr(link string, attr string, data []byte, flags int) (err error) { 242 d := unsafe.Pointer(&data[0]) 243 datasiz := len(data) 244 245 nsid, a, err := xattrnamespace(attr) 246 if err != nil { 247 return 248 } 249 250 _, err = ExtattrSetLink(link, nsid, a, uintptr(d), datasiz) 251 return 252 } 253 254 func Removexattr(file string, attr string) (err error) { 255 nsid, a, err := xattrnamespace(attr) 256 if err != nil { 257 return 258 } 259 260 err = ExtattrDeleteFile(file, nsid, a) 261 return 262 } 263 264 func Fremovexattr(fd int, attr string) (err error) { 265 nsid, a, err := xattrnamespace(attr) 266 if err != nil { 267 return 268 } 269 270 err = ExtattrDeleteFd(fd, nsid, a) 271 return 272 } 273 274 func Lremovexattr(link string, attr string) (err error) { 275 nsid, a, err := xattrnamespace(attr) 276 if err != nil { 277 return 278 } 279 280 err = ExtattrDeleteLink(link, nsid, a) 281 return 282 } 283 284 func Listxattr(file string, dest []byte) (sz int, err error) { 285 d := initxattrdest(dest, 0) 286 destsiz := len(dest) 287 288 // FreeBSD won't allow you to list xattrs from multiple namespaces 289 s := 0 290 var e error 291 for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { 292 stmp, e := ExtattrListFile(file, nsid, uintptr(d), destsiz) 293 294 /* Errors accessing system attrs are ignored so that 295 * we can implement the Linux-like behavior of omitting errors that 296 * we don't have read permissions on 297 * 298 * Linux will still error if we ask for user attributes on a file that 299 * we don't have read permissions on, so don't ignore those errors 300 */ 301 if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { 302 e = nil 303 continue 304 } else if e != nil { 305 return s, e 306 } 307 308 s += stmp 309 destsiz -= s 310 if destsiz < 0 { 311 destsiz = 0 312 } 313 d = initxattrdest(dest, s) 314 } 315 316 return s, e 317 } 318 319 func Flistxattr(fd int, dest []byte) (sz int, err error) { 320 d := initxattrdest(dest, 0) 321 destsiz := len(dest) 322 323 s := 0 324 var e error 325 for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { 326 stmp, e := ExtattrListFd(fd, nsid, uintptr(d), destsiz) 327 if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { 328 e = nil 329 continue 330 } else if e != nil { 331 return s, e 332 } 333 334 s += stmp 335 destsiz -= s 336 if destsiz < 0 { 337 destsiz = 0 338 } 339 d = initxattrdest(dest, s) 340 } 341 342 return s, e 343 } 344 345 func Llistxattr(link string, dest []byte) (sz int, err error) { 346 d := initxattrdest(dest, 0) 347 destsiz := len(dest) 348 349 s := 0 350 var e error 351 for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { 352 stmp, e := ExtattrListLink(link, nsid, uintptr(d), destsiz) 353 if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { 354 e = nil 355 continue 356 } else if e != nil { 357 return s, e 358 } 359 360 s += stmp 361 destsiz -= s 362 if destsiz < 0 { 363 destsiz = 0 364 } 365 d = initxattrdest(dest, s) 366 } 367 368 return s, e 369 } 370 371 /* 372 * Exposed directly 373 */ 374 //sys Access(path string, mode uint32) (err error) 375 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 376 //sys Chdir(path string) (err error) 377 //sys Chflags(path string, flags int) (err error) 378 //sys Chmod(path string, mode uint32) (err error) 379 //sys Chown(path string, uid int, gid int) (err error) 380 //sys Chroot(path string) (err error) 381 //sys Close(fd int) (err error) 382 //sys Dup(fd int) (nfd int, err error) 383 //sys Dup2(from int, to int) (err error) 384 //sys Exit(code int) 385 //sys ExtattrGetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 386 //sys ExtattrSetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 387 //sys ExtattrDeleteFd(fd int, attrnamespace int, attrname string) (err error) 388 //sys ExtattrListFd(fd int, attrnamespace int, data uintptr, nbytes int) (ret int, err error) 389 //sys ExtattrGetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 390 //sys ExtattrSetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 391 //sys ExtattrDeleteFile(file string, attrnamespace int, attrname string) (err error) 392 //sys ExtattrListFile(file string, attrnamespace int, data uintptr, nbytes int) (ret int, err error) 393 //sys ExtattrGetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 394 //sys ExtattrSetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 395 //sys ExtattrDeleteLink(link string, attrnamespace int, attrname string) (err error) 396 //sys ExtattrListLink(link string, attrnamespace int, data uintptr, nbytes int) (ret int, err error) 397 //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_POSIX_FADVISE 398 //sys Fchdir(fd int) (err error) 399 //sys Fchflags(fd int, flags int) (err error) 400 //sys Fchmod(fd int, mode uint32) (err error) 401 //sys Fchown(fd int, uid int, gid int) (err error) 402 //sys Flock(fd int, how int) (err error) 403 //sys Fpathconf(fd int, name int) (val int, err error) 404 //sys Fstat(fd int, stat *Stat_t) (err error) 405 //sys Fstatfs(fd int, stat *Statfs_t) (err error) 406 //sys Fsync(fd int) (err error) 407 //sys Ftruncate(fd int, length int64) (err error) 408 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) 409 //sys Getdtablesize() (size int) 410 //sysnb Getegid() (egid int) 411 //sysnb Geteuid() (uid int) 412 //sysnb Getgid() (gid int) 413 //sysnb Getpgid(pid int) (pgid int, err error) 414 //sysnb Getpgrp() (pgrp int) 415 //sysnb Getpid() (pid int) 416 //sysnb Getppid() (ppid int) 417 //sys Getpriority(which int, who int) (prio int, err error) 418 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 419 //sysnb Getrusage(who int, rusage *Rusage) (err error) 420 //sysnb Getsid(pid int) (sid int, err error) 421 //sysnb Gettimeofday(tv *Timeval) (err error) 422 //sysnb Getuid() (uid int) 423 //sys Issetugid() (tainted bool) 424 //sys Kill(pid int, signum syscall.Signal) (err error) 425 //sys Kqueue() (fd int, err error) 426 //sys Lchown(path string, uid int, gid int) (err error) 427 //sys Link(path string, link string) (err error) 428 //sys Listen(s int, backlog int) (err error) 429 //sys Lstat(path string, stat *Stat_t) (err error) 430 //sys Mkdir(path string, mode uint32) (err error) 431 //sys Mkfifo(path string, mode uint32) (err error) 432 //sys Mknod(path string, mode uint32, dev int) (err error) 433 //sys Mlock(b []byte) (err error) 434 //sys Mlockall(flags int) (err error) 435 //sys Mprotect(b []byte, prot int) (err error) 436 //sys Munlock(b []byte) (err error) 437 //sys Munlockall() (err error) 438 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) 439 //sys Open(path string, mode int, perm uint32) (fd int, err error) 440 //sys Pathconf(path string, name int) (val int, err error) 441 //sys Pread(fd int, p []byte, offset int64) (n int, err error) 442 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) 443 //sys read(fd int, p []byte) (n int, err error) 444 //sys Readlink(path string, buf []byte) (n int, err error) 445 //sys Rename(from string, to string) (err error) 446 //sys Revoke(path string) (err error) 447 //sys Rmdir(path string) (err error) 448 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 449 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 450 //sysnb Setegid(egid int) (err error) 451 //sysnb Seteuid(euid int) (err error) 452 //sysnb Setgid(gid int) (err error) 453 //sys Setlogin(name string) (err error) 454 //sysnb Setpgid(pid int, pgid int) (err error) 455 //sys Setpriority(which int, who int, prio int) (err error) 456 //sysnb Setregid(rgid int, egid int) (err error) 457 //sysnb Setreuid(ruid int, euid int) (err error) 458 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) 459 //sysnb Setresuid(ruid int, euid int, suid int) (err error) 460 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 461 //sysnb Setsid() (pid int, err error) 462 //sysnb Settimeofday(tp *Timeval) (err error) 463 //sysnb Setuid(uid int) (err error) 464 //sys Stat(path string, stat *Stat_t) (err error) 465 //sys Statfs(path string, stat *Statfs_t) (err error) 466 //sys Symlink(path string, link string) (err error) 467 //sys Sync() (err error) 468 //sys Truncate(path string, length int64) (err error) 469 //sys Umask(newmask int) (oldmask int) 470 //sys Undelete(path string) (err error) 471 //sys Unlink(path string) (err error) 472 //sys Unmount(path string, flags int) (err error) 473 //sys write(fd int, p []byte) (n int, err error) 474 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 475 //sys munmap(addr uintptr, length uintptr) (err error) 476 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 477 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 478 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) 479 480 /* 481 * Unimplemented 482 */ 483 // Profil 484 // Sigaction 485 // Sigprocmask 486 // Getlogin 487 // Sigpending 488 // Sigaltstack 489 // Ioctl 490 // Reboot 491 // Execve 492 // Vfork 493 // Sbrk 494 // Sstk 495 // Ovadvise 496 // Mincore 497 // Setitimer 498 // Swapon 499 // Select 500 // Sigsuspend 501 // Readv 502 // Writev 503 // Nfssvc 504 // Getfh 505 // Quotactl 506 // Mount 507 // Csops 508 // Waitid 509 // Add_profil 510 // Kdebug_trace 511 // Sigreturn 512 // Mmap 513 // Mlock 514 // Munlock 515 // Atsocket 516 // Kqueue_from_portset_np 517 // Kqueue_portset 518 // Getattrlist 519 // Setattrlist 520 // Getdirentriesattr 521 // Searchfs 522 // Delete 523 // Copyfile 524 // Poll 525 // Watchevent 526 // Waitevent 527 // Modwatch 528 // Getxattr 529 // Fgetxattr 530 // Setxattr 531 // Fsetxattr 532 // Removexattr 533 // Fremovexattr 534 // Listxattr 535 // Flistxattr 536 // Fsctl 537 // Initgroups 538 // Posix_spawn 539 // Nfsclnt 540 // Fhopen 541 // Minherit 542 // Semsys 543 // Msgsys 544 // Shmsys 545 // Semctl 546 // Semget 547 // Semop 548 // Msgctl 549 // Msgget 550 // Msgsnd 551 // Msgrcv 552 // Shmat 553 // Shmctl 554 // Shmdt 555 // Shmget 556 // Shm_open 557 // Shm_unlink 558 // Sem_open 559 // Sem_close 560 // Sem_unlink 561 // Sem_wait 562 // Sem_trywait 563 // Sem_post 564 // Sem_getvalue 565 // Sem_init 566 // Sem_destroy 567 // Open_extended 568 // Umask_extended 569 // Stat_extended 570 // Lstat_extended 571 // Fstat_extended 572 // Chmod_extended 573 // Fchmod_extended 574 // Access_extended 575 // Settid 576 // Gettid 577 // Setsgroups 578 // Getsgroups 579 // Setwgroups 580 // Getwgroups 581 // Mkfifo_extended 582 // Mkdir_extended 583 // Identitysvc 584 // Shared_region_check_np 585 // Shared_region_map_np 586 // __pthread_mutex_destroy 587 // __pthread_mutex_init 588 // __pthread_mutex_lock 589 // __pthread_mutex_trylock 590 // __pthread_mutex_unlock 591 // __pthread_cond_init 592 // __pthread_cond_destroy 593 // __pthread_cond_broadcast 594 // __pthread_cond_signal 595 // Setsid_with_pid 596 // __pthread_cond_timedwait 597 // Aio_fsync 598 // Aio_return 599 // Aio_suspend 600 // Aio_cancel 601 // Aio_error 602 // Aio_read 603 // Aio_write 604 // Lio_listio 605 // __pthread_cond_wait 606 // Iopolicysys 607 // Mlockall 608 // Munlockall 609 // __pthread_kill 610 // __pthread_sigmask 611 // __sigwait 612 // __disable_threadsignal 613 // __pthread_markcancel 614 // __pthread_canceled 615 // __semwait_signal 616 // Proc_info 617 // Stat64_extended 618 // Lstat64_extended 619 // Fstat64_extended 620 // __pthread_chdir 621 // __pthread_fchdir 622 // Audit 623 // Auditon 624 // Getauid 625 // Setauid 626 // Getaudit 627 // Setaudit 628 // Getaudit_addr 629 // Setaudit_addr 630 // Auditctl 631 // Bsdthread_create 632 // Bsdthread_terminate 633 // Stack_snapshot 634 // Bsdthread_register 635 // Workq_open 636 // Workq_ops 637 // __mac_execve 638 // __mac_syscall 639 // __mac_get_file 640 // __mac_set_file 641 // __mac_get_link 642 // __mac_set_link 643 // __mac_get_proc 644 // __mac_set_proc 645 // __mac_get_fd 646 // __mac_set_fd 647 // __mac_get_pid 648 // __mac_get_lcid 649 // __mac_get_lctx 650 // __mac_set_lctx 651 // Setlcid 652 // Read_nocancel 653 // Write_nocancel 654 // Open_nocancel 655 // Close_nocancel 656 // Wait4_nocancel 657 // Recvmsg_nocancel 658 // Sendmsg_nocancel 659 // Recvfrom_nocancel 660 // Accept_nocancel 661 // Msync_nocancel 662 // Fcntl_nocancel 663 // Select_nocancel 664 // Fsync_nocancel 665 // Connect_nocancel 666 // Sigsuspend_nocancel 667 // Readv_nocancel 668 // Writev_nocancel 669 // Sendto_nocancel 670 // Pread_nocancel 671 // Pwrite_nocancel 672 // Waitid_nocancel 673 // Poll_nocancel 674 // Msgsnd_nocancel 675 // Msgrcv_nocancel 676 // Sem_wait_nocancel 677 // Aio_suspend_nocancel 678 // __sigwait_nocancel 679 // __semwait_signal_nocancel 680 // __mac_mount 681 // __mac_get_mount 682 // __mac_getfsstat