github.com/maenmax/kairep@v0.0.0-20210218001208-55bf3df36788/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 use(unsafe.Pointer(_p0)) 133 n = int(r0) 134 if e1 != 0 { 135 err = e1 136 } 137 return 138 } 139 140 // Derive extattr namespace and attribute name 141 142 func xattrnamespace(fullattr string) (ns int, attr string, err error) { 143 s := -1 144 for idx, val := range fullattr { 145 if val == '.' { 146 s = idx 147 break 148 } 149 } 150 151 if s == -1 { 152 return -1, "", ENOATTR 153 } 154 155 namespace := fullattr[0:s] 156 attr = fullattr[s+1:] 157 158 switch namespace { 159 case "user": 160 return EXTATTR_NAMESPACE_USER, attr, nil 161 case "system": 162 return EXTATTR_NAMESPACE_SYSTEM, attr, nil 163 default: 164 return -1, "", ENOATTR 165 } 166 } 167 168 func initxattrdest(dest []byte, idx int) (d unsafe.Pointer) { 169 if len(dest) > idx { 170 return unsafe.Pointer(&dest[idx]) 171 } else { 172 return unsafe.Pointer(_zero) 173 } 174 } 175 176 // FreeBSD implements its own syscalls to handle extended attributes 177 178 func Getxattr(file string, attr string, dest []byte) (sz int, err error) { 179 d := initxattrdest(dest, 0) 180 destsize := len(dest) 181 182 nsid, a, err := xattrnamespace(attr) 183 if err != nil { 184 return -1, err 185 } 186 187 return ExtattrGetFile(file, nsid, a, uintptr(d), destsize) 188 } 189 190 func Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) { 191 d := initxattrdest(dest, 0) 192 destsize := len(dest) 193 194 nsid, a, err := xattrnamespace(attr) 195 if err != nil { 196 return -1, err 197 } 198 199 return ExtattrGetFd(fd, nsid, a, uintptr(d), destsize) 200 } 201 202 func Lgetxattr(link string, attr string, dest []byte) (sz int, err error) { 203 d := initxattrdest(dest, 0) 204 destsize := len(dest) 205 206 nsid, a, err := xattrnamespace(attr) 207 if err != nil { 208 return -1, err 209 } 210 211 return ExtattrGetLink(link, nsid, a, uintptr(d), destsize) 212 } 213 214 // flags are unused on FreeBSD 215 216 func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) { 217 d := unsafe.Pointer(&data[0]) 218 datasiz := len(data) 219 220 nsid, a, err := xattrnamespace(attr) 221 if err != nil { 222 return 223 } 224 225 _, err = ExtattrSetFd(fd, nsid, a, uintptr(d), datasiz) 226 return 227 } 228 229 func Setxattr(file string, attr string, data []byte, flags int) (err error) { 230 d := unsafe.Pointer(&data[0]) 231 datasiz := len(data) 232 233 nsid, a, err := xattrnamespace(attr) 234 if err != nil { 235 return 236 } 237 238 _, err = ExtattrSetFile(file, nsid, a, uintptr(d), datasiz) 239 return 240 } 241 242 func Lsetxattr(link string, attr string, data []byte, flags int) (err error) { 243 d := unsafe.Pointer(&data[0]) 244 datasiz := len(data) 245 246 nsid, a, err := xattrnamespace(attr) 247 if err != nil { 248 return 249 } 250 251 _, err = ExtattrSetLink(link, nsid, a, uintptr(d), datasiz) 252 return 253 } 254 255 func Removexattr(file string, attr string) (err error) { 256 nsid, a, err := xattrnamespace(attr) 257 if err != nil { 258 return 259 } 260 261 err = ExtattrDeleteFile(file, nsid, a) 262 return 263 } 264 265 func Fremovexattr(fd int, attr string) (err error) { 266 nsid, a, err := xattrnamespace(attr) 267 if err != nil { 268 return 269 } 270 271 err = ExtattrDeleteFd(fd, nsid, a) 272 return 273 } 274 275 func Lremovexattr(link string, attr string) (err error) { 276 nsid, a, err := xattrnamespace(attr) 277 if err != nil { 278 return 279 } 280 281 err = ExtattrDeleteLink(link, nsid, a) 282 return 283 } 284 285 func Listxattr(file string, dest []byte) (sz int, err error) { 286 d := initxattrdest(dest, 0) 287 destsiz := len(dest) 288 289 // FreeBSD won't allow you to list xattrs from multiple namespaces 290 s := 0 291 var e error 292 for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { 293 stmp, e := ExtattrListFile(file, nsid, uintptr(d), destsiz) 294 295 /* Errors accessing system attrs are ignored so that 296 * we can implement the Linux-like behavior of omitting errors that 297 * we don't have read permissions on 298 * 299 * Linux will still error if we ask for user attributes on a file that 300 * we don't have read permissions on, so don't ignore those errors 301 */ 302 if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { 303 e = nil 304 continue 305 } else if e != nil { 306 return s, e 307 } 308 309 s += stmp 310 destsiz -= s 311 if destsiz < 0 { 312 destsiz = 0 313 } 314 d = initxattrdest(dest, s) 315 } 316 317 return s, e 318 } 319 320 func Flistxattr(fd int, dest []byte) (sz int, err error) { 321 d := initxattrdest(dest, 0) 322 destsiz := len(dest) 323 324 s := 0 325 var e error 326 for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { 327 stmp, e := ExtattrListFd(fd, nsid, uintptr(d), destsiz) 328 if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { 329 e = nil 330 continue 331 } else if e != nil { 332 return s, e 333 } 334 335 s += stmp 336 destsiz -= s 337 if destsiz < 0 { 338 destsiz = 0 339 } 340 d = initxattrdest(dest, s) 341 } 342 343 return s, e 344 } 345 346 func Llistxattr(link string, dest []byte) (sz int, err error) { 347 d := initxattrdest(dest, 0) 348 destsiz := len(dest) 349 350 s := 0 351 var e error 352 for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { 353 stmp, e := ExtattrListLink(link, nsid, uintptr(d), destsiz) 354 if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { 355 e = nil 356 continue 357 } else if e != nil { 358 return s, e 359 } 360 361 s += stmp 362 destsiz -= s 363 if destsiz < 0 { 364 destsiz = 0 365 } 366 d = initxattrdest(dest, s) 367 } 368 369 return s, e 370 } 371 372 /* 373 * Exposed directly 374 */ 375 //sys Access(path string, mode uint32) (err error) 376 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 377 //sys Chdir(path string) (err error) 378 //sys Chflags(path string, flags int) (err error) 379 //sys Chmod(path string, mode uint32) (err error) 380 //sys Chown(path string, uid int, gid int) (err error) 381 //sys Chroot(path string) (err error) 382 //sys Close(fd int) (err error) 383 //sys Dup(fd int) (nfd int, err error) 384 //sys Dup2(from int, to int) (err error) 385 //sys Exit(code int) 386 //sys ExtattrGetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 387 //sys ExtattrSetFd(fd int, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 388 //sys ExtattrDeleteFd(fd int, attrnamespace int, attrname string) (err error) 389 //sys ExtattrListFd(fd int, attrnamespace int, data uintptr, nbytes int) (ret int, err error) 390 //sys ExtattrGetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 391 //sys ExtattrSetFile(file string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 392 //sys ExtattrDeleteFile(file string, attrnamespace int, attrname string) (err error) 393 //sys ExtattrListFile(file string, attrnamespace int, data uintptr, nbytes int) (ret int, err error) 394 //sys ExtattrGetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 395 //sys ExtattrSetLink(link string, attrnamespace int, attrname string, data uintptr, nbytes int) (ret int, err error) 396 //sys ExtattrDeleteLink(link string, attrnamespace int, attrname string) (err error) 397 //sys ExtattrListLink(link string, attrnamespace int, data uintptr, nbytes int) (ret int, err error) 398 //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_POSIX_FADVISE 399 //sys Fchdir(fd int) (err error) 400 //sys Fchflags(fd int, flags int) (err error) 401 //sys Fchmod(fd int, mode uint32) (err error) 402 //sys Fchown(fd int, uid int, gid int) (err error) 403 //sys Flock(fd int, how int) (err error) 404 //sys Fpathconf(fd int, name int) (val int, err error) 405 //sys Fstat(fd int, stat *Stat_t) (err error) 406 //sys Fstatfs(fd int, stat *Statfs_t) (err error) 407 //sys Fsync(fd int) (err error) 408 //sys Ftruncate(fd int, length int64) (err error) 409 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) 410 //sys Getdtablesize() (size int) 411 //sysnb Getegid() (egid int) 412 //sysnb Geteuid() (uid int) 413 //sysnb Getgid() (gid int) 414 //sysnb Getpgid(pid int) (pgid int, err error) 415 //sysnb Getpgrp() (pgrp int) 416 //sysnb Getpid() (pid int) 417 //sysnb Getppid() (ppid int) 418 //sys Getpriority(which int, who int) (prio int, err error) 419 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 420 //sysnb Getrusage(who int, rusage *Rusage) (err error) 421 //sysnb Getsid(pid int) (sid int, err error) 422 //sysnb Gettimeofday(tv *Timeval) (err error) 423 //sysnb Getuid() (uid int) 424 //sys Issetugid() (tainted bool) 425 //sys Kill(pid int, signum syscall.Signal) (err error) 426 //sys Kqueue() (fd int, err error) 427 //sys Lchown(path string, uid int, gid int) (err error) 428 //sys Link(path string, link string) (err error) 429 //sys Listen(s int, backlog int) (err error) 430 //sys Lstat(path string, stat *Stat_t) (err error) 431 //sys Mkdir(path string, mode uint32) (err error) 432 //sys Mkfifo(path string, mode uint32) (err error) 433 //sys Mknod(path string, mode uint32, dev int) (err error) 434 //sys Mlock(b []byte) (err error) 435 //sys Mlockall(flags int) (err error) 436 //sys Mprotect(b []byte, prot int) (err error) 437 //sys Munlock(b []byte) (err error) 438 //sys Munlockall() (err error) 439 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) 440 //sys Open(path string, mode int, perm uint32) (fd int, err error) 441 //sys Pathconf(path string, name int) (val int, err error) 442 //sys Pread(fd int, p []byte, offset int64) (n int, err error) 443 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) 444 //sys read(fd int, p []byte) (n int, err error) 445 //sys Readlink(path string, buf []byte) (n int, err error) 446 //sys Rename(from string, to string) (err error) 447 //sys Revoke(path string) (err error) 448 //sys Rmdir(path string) (err error) 449 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 450 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 451 //sysnb Setegid(egid int) (err error) 452 //sysnb Seteuid(euid int) (err error) 453 //sysnb Setgid(gid int) (err error) 454 //sys Setlogin(name string) (err error) 455 //sysnb Setpgid(pid int, pgid int) (err error) 456 //sys Setpriority(which int, who int, prio int) (err error) 457 //sysnb Setregid(rgid int, egid int) (err error) 458 //sysnb Setreuid(ruid int, euid int) (err error) 459 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) 460 //sysnb Setresuid(ruid int, euid int, suid int) (err error) 461 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 462 //sysnb Setsid() (pid int, err error) 463 //sysnb Settimeofday(tp *Timeval) (err error) 464 //sysnb Setuid(uid int) (err error) 465 //sys Stat(path string, stat *Stat_t) (err error) 466 //sys Statfs(path string, stat *Statfs_t) (err error) 467 //sys Symlink(path string, link string) (err error) 468 //sys Sync() (err error) 469 //sys Truncate(path string, length int64) (err error) 470 //sys Umask(newmask int) (oldmask int) 471 //sys Undelete(path string) (err error) 472 //sys Unlink(path string) (err error) 473 //sys Unmount(path string, flags int) (err error) 474 //sys write(fd int, p []byte) (n int, err error) 475 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 476 //sys munmap(addr uintptr, length uintptr) (err error) 477 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 478 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 479 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) 480 481 /* 482 * Unimplemented 483 */ 484 // Profil 485 // Sigaction 486 // Sigprocmask 487 // Getlogin 488 // Sigpending 489 // Sigaltstack 490 // Ioctl 491 // Reboot 492 // Execve 493 // Vfork 494 // Sbrk 495 // Sstk 496 // Ovadvise 497 // Mincore 498 // Setitimer 499 // Swapon 500 // Select 501 // Sigsuspend 502 // Readv 503 // Writev 504 // Nfssvc 505 // Getfh 506 // Quotactl 507 // Mount 508 // Csops 509 // Waitid 510 // Add_profil 511 // Kdebug_trace 512 // Sigreturn 513 // Mmap 514 // Mlock 515 // Munlock 516 // Atsocket 517 // Kqueue_from_portset_np 518 // Kqueue_portset 519 // Getattrlist 520 // Setattrlist 521 // Getdirentriesattr 522 // Searchfs 523 // Delete 524 // Copyfile 525 // Poll 526 // Watchevent 527 // Waitevent 528 // Modwatch 529 // Getxattr 530 // Fgetxattr 531 // Setxattr 532 // Fsetxattr 533 // Removexattr 534 // Fremovexattr 535 // Listxattr 536 // Flistxattr 537 // Fsctl 538 // Initgroups 539 // Posix_spawn 540 // Nfsclnt 541 // Fhopen 542 // Minherit 543 // Semsys 544 // Msgsys 545 // Shmsys 546 // Semctl 547 // Semget 548 // Semop 549 // Msgctl 550 // Msgget 551 // Msgsnd 552 // Msgrcv 553 // Shmat 554 // Shmctl 555 // Shmdt 556 // Shmget 557 // Shm_open 558 // Shm_unlink 559 // Sem_open 560 // Sem_close 561 // Sem_unlink 562 // Sem_wait 563 // Sem_trywait 564 // Sem_post 565 // Sem_getvalue 566 // Sem_init 567 // Sem_destroy 568 // Open_extended 569 // Umask_extended 570 // Stat_extended 571 // Lstat_extended 572 // Fstat_extended 573 // Chmod_extended 574 // Fchmod_extended 575 // Access_extended 576 // Settid 577 // Gettid 578 // Setsgroups 579 // Getsgroups 580 // Setwgroups 581 // Getwgroups 582 // Mkfifo_extended 583 // Mkdir_extended 584 // Identitysvc 585 // Shared_region_check_np 586 // Shared_region_map_np 587 // __pthread_mutex_destroy 588 // __pthread_mutex_init 589 // __pthread_mutex_lock 590 // __pthread_mutex_trylock 591 // __pthread_mutex_unlock 592 // __pthread_cond_init 593 // __pthread_cond_destroy 594 // __pthread_cond_broadcast 595 // __pthread_cond_signal 596 // Setsid_with_pid 597 // __pthread_cond_timedwait 598 // Aio_fsync 599 // Aio_return 600 // Aio_suspend 601 // Aio_cancel 602 // Aio_error 603 // Aio_read 604 // Aio_write 605 // Lio_listio 606 // __pthread_cond_wait 607 // Iopolicysys 608 // Mlockall 609 // Munlockall 610 // __pthread_kill 611 // __pthread_sigmask 612 // __sigwait 613 // __disable_threadsignal 614 // __pthread_markcancel 615 // __pthread_canceled 616 // __semwait_signal 617 // Proc_info 618 // Stat64_extended 619 // Lstat64_extended 620 // Fstat64_extended 621 // __pthread_chdir 622 // __pthread_fchdir 623 // Audit 624 // Auditon 625 // Getauid 626 // Setauid 627 // Getaudit 628 // Setaudit 629 // Getaudit_addr 630 // Setaudit_addr 631 // Auditctl 632 // Bsdthread_create 633 // Bsdthread_terminate 634 // Stack_snapshot 635 // Bsdthread_register 636 // Workq_open 637 // Workq_ops 638 // __mac_execve 639 // __mac_syscall 640 // __mac_get_file 641 // __mac_set_file 642 // __mac_get_link 643 // __mac_set_link 644 // __mac_get_proc 645 // __mac_set_proc 646 // __mac_get_fd 647 // __mac_set_fd 648 // __mac_get_pid 649 // __mac_get_lcid 650 // __mac_get_lctx 651 // __mac_set_lctx 652 // Setlcid 653 // Read_nocancel 654 // Write_nocancel 655 // Open_nocancel 656 // Close_nocancel 657 // Wait4_nocancel 658 // Recvmsg_nocancel 659 // Sendmsg_nocancel 660 // Recvfrom_nocancel 661 // Accept_nocancel 662 // Msync_nocancel 663 // Fcntl_nocancel 664 // Select_nocancel 665 // Fsync_nocancel 666 // Connect_nocancel 667 // Sigsuspend_nocancel 668 // Readv_nocancel 669 // Writev_nocancel 670 // Sendto_nocancel 671 // Pread_nocancel 672 // Pwrite_nocancel 673 // Waitid_nocancel 674 // Poll_nocancel 675 // Msgsnd_nocancel 676 // Msgrcv_nocancel 677 // Sem_wait_nocancel 678 // Aio_suspend_nocancel 679 // __sigwait_nocancel 680 // __semwait_signal_nocancel 681 // __mac_mount 682 // __mac_get_mount 683 // __mac_getfsstat