1 // Copyright 2009 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 // DragonFly BSD 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 // SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets. 18 type SockaddrDatalink struct { 19 Len uint8 20 Family uint8 21 Index uint16 22 Type uint8 23 Nlen uint8 24 Alen uint8 25 Slen uint8 26 Data [12]int8 27 Rcf uint16 28 Route [16]uint16 29 raw RawSockaddrDatalink 30 } 31 32 // Translate "kern.hostname" to []_C_int{0,1,2,3}. 33 func nametomib(name string) (mib []_C_int, err error) { 34 const siz = unsafe.Sizeof(mib[0]) 35 36 // NOTE(rsc): It seems strange to set the buffer to have 37 // size CTL_MAXNAME+2 but use only CTL_MAXNAME 38 // as the size. I don't know why the +2 is here, but the 39 // kernel uses +2 for its own implementation of this function. 40 // I am scared that if we don't include the +2 here, the kernel 41 // will silently write 2 words farther than we specify 42 // and we'll get memory corruption. 43 var buf [CTL_MAXNAME + 2]_C_int 44 n := uintptr(CTL_MAXNAME) * siz 45 46 p := (*byte)(unsafe.Pointer(&buf[0])) 47 bytes, err := ByteSliceFromString(name) 48 if err != nil { 49 return nil, err 50 } 51 52 // Magic sysctl: "setting" 0.3 to a string name 53 // lets you read back the array of integers form. 54 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { 55 return nil, err 56 } 57 return buf[0 : n/siz], nil 58 } 59 60 //sysnb pipe() (r int, w int, err error) 61 62 func Pipe(p []int) (err error) { 63 if len(p) != 2 { 64 return EINVAL 65 } 66 p[0], p[1], err = pipe() 67 return 68 } 69 70 //sys extpread(fd int, p []byte, flags int, offset int64) (n int, err error) 71 func Pread(fd int, p []byte, offset int64) (n int, err error) { 72 return extpread(fd, p, 0, offset) 73 } 74 75 //sys extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error) 76 func Pwrite(fd int, p []byte, offset int64) (n int, err error) { 77 return extpwrite(fd, p, 0, offset) 78 } 79 80 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { 81 var rsa RawSockaddrAny 82 var len _Socklen = SizeofSockaddrAny 83 nfd, err = accept4(fd, &rsa, &len, flags) 84 if err != nil { 85 return 86 } 87 if len > SizeofSockaddrAny { 88 panic("RawSockaddrAny too small") 89 } 90 sa, err = anyToSockaddr(fd, &rsa) 91 if err != nil { 92 Close(nfd) 93 nfd = 0 94 } 95 return 96 } 97 98 const ImplementsGetwd = true 99 100 //sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD 101 102 func Getwd() (string, error) { 103 var buf [PathMax]byte 104 _, err := Getcwd(buf[0:]) 105 if err != nil { 106 return "", err 107 } 108 n := clen(buf[:]) 109 if n < 1 { 110 return "", EINVAL 111 } 112 return string(buf[:n]), nil 113 } 114 115 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 116 var _p0 unsafe.Pointer 117 var bufsize uintptr 118 if len(buf) > 0 { 119 _p0 = unsafe.Pointer(&buf[0]) 120 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 121 } 122 r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) 123 n = int(r0) 124 if e1 != 0 { 125 err = e1 126 } 127 return 128 } 129 130 func setattrlistTimes(path string, times []Timespec, flags int) error { 131 // used on Darwin for UtimesNano 132 return ENOSYS 133 } 134 135 //sys ioctl(fd int, req uint, arg uintptr) (err error) 136 137 // ioctl itself should not be exposed directly, but additional get/set 138 // functions for specific types are permissible. 139 140 // IoctlSetInt performs an ioctl operation which sets an integer value 141 // on fd, using the specified request number. 142 func IoctlSetInt(fd int, req uint, value int) error { 143 return ioctl(fd, req, uintptr(value)) 144 } 145 146 func ioctlSetWinsize(fd int, req uint, value *Winsize) error { 147 return ioctl(fd, req, uintptr(unsafe.Pointer(value))) 148 } 149 150 func ioctlSetTermios(fd int, req uint, value *Termios) error { 151 return ioctl(fd, req, uintptr(unsafe.Pointer(value))) 152 } 153 154 // IoctlGetInt performs an ioctl operation which gets an integer value 155 // from fd, using the specified request number. 156 func IoctlGetInt(fd int, req uint) (int, error) { 157 var value int 158 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 159 return value, err 160 } 161 162 func IoctlGetWinsize(fd int, req uint) (*Winsize, error) { 163 var value Winsize 164 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 165 return &value, err 166 } 167 168 func IoctlGetTermios(fd int, req uint) (*Termios, error) { 169 var value Termios 170 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 171 return &value, err 172 } 173 174 func sysctlUname(mib []_C_int, old *byte, oldlen *uintptr) error { 175 err := sysctl(mib, old, oldlen, nil, 0) 176 if err != nil { 177 // Utsname members on Dragonfly are only 32 bytes and 178 // the syscall returns ENOMEM in case the actual value 179 // is longer. 180 if err == ENOMEM { 181 err = nil 182 } 183 } 184 return err 185 } 186 187 func Uname(uname *Utsname) error { 188 mib := []_C_int{CTL_KERN, KERN_OSTYPE} 189 n := unsafe.Sizeof(uname.Sysname) 190 if err := sysctlUname(mib, &uname.Sysname[0], &n); err != nil { 191 return err 192 } 193 uname.Sysname[unsafe.Sizeof(uname.Sysname)-1] = 0 194 195 mib = []_C_int{CTL_KERN, KERN_HOSTNAME} 196 n = unsafe.Sizeof(uname.Nodename) 197 if err := sysctlUname(mib, &uname.Nodename[0], &n); err != nil { 198 return err 199 } 200 uname.Nodename[unsafe.Sizeof(uname.Nodename)-1] = 0 201 202 mib = []_C_int{CTL_KERN, KERN_OSRELEASE} 203 n = unsafe.Sizeof(uname.Release) 204 if err := sysctlUname(mib, &uname.Release[0], &n); err != nil { 205 return err 206 } 207 uname.Release[unsafe.Sizeof(uname.Release)-1] = 0 208 209 mib = []_C_int{CTL_KERN, KERN_VERSION} 210 n = unsafe.Sizeof(uname.Version) 211 if err := sysctlUname(mib, &uname.Version[0], &n); err != nil { 212 return err 213 } 214 215 // The version might have newlines or tabs in it, convert them to 216 // spaces. 217 for i, b := range uname.Version { 218 if b == '\n' || b == '\t' { 219 if i == len(uname.Version)-1 { 220 uname.Version[i] = 0 221 } else { 222 uname.Version[i] = ' ' 223 } 224 } 225 } 226 227 mib = []_C_int{CTL_HW, HW_MACHINE} 228 n = unsafe.Sizeof(uname.Machine) 229 if err := sysctlUname(mib, &uname.Machine[0], &n); err != nil { 230 return err 231 } 232 uname.Machine[unsafe.Sizeof(uname.Machine)-1] = 0 233 234 return nil 235 } 236 237 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { 238 if raceenabled { 239 raceReleaseMerge(unsafe.Pointer(&ioSync)) 240 } 241 return sendfile(outfd, infd, offset, count) 242 } 243 244 /* 245 * Exposed directly 246 */ 247 //sys Access(path string, mode uint32) (err error) 248 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 249 //sys Chdir(path string) (err error) 250 //sys Chflags(path string, flags int) (err error) 251 //sys Chmod(path string, mode uint32) (err error) 252 //sys Chown(path string, uid int, gid int) (err error) 253 //sys Chroot(path string) (err error) 254 //sys Close(fd int) (err error) 255 //sys Dup(fd int) (nfd int, err error) 256 //sys Dup2(from int, to int) (err error) 257 //sys Exit(code int) 258 //sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) 259 //sys Fchdir(fd int) (err error) 260 //sys Fchflags(fd int, flags int) (err error) 261 //sys Fchmod(fd int, mode uint32) (err error) 262 //sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) 263 //sys Fchown(fd int, uid int, gid int) (err error) 264 //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) 265 //sys Flock(fd int, how int) (err error) 266 //sys Fpathconf(fd int, name int) (val int, err error) 267 //sys Fstat(fd int, stat *Stat_t) (err error) 268 //sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) 269 //sys Fstatfs(fd int, stat *Statfs_t) (err error) 270 //sys Fsync(fd int) (err error) 271 //sys Ftruncate(fd int, length int64) (err error) 272 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) 273 //sys Getdtablesize() (size int) 274 //sysnb Getegid() (egid int) 275 //sysnb Geteuid() (uid int) 276 //sysnb Getgid() (gid int) 277 //sysnb Getpgid(pid int) (pgid int, err error) 278 //sysnb Getpgrp() (pgrp int) 279 //sysnb Getpid() (pid int) 280 //sysnb Getppid() (ppid int) 281 //sys Getpriority(which int, who int) (prio int, err error) 282 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 283 //sysnb Getrusage(who int, rusage *Rusage) (err error) 284 //sysnb Getsid(pid int) (sid int, err error) 285 //sysnb Gettimeofday(tv *Timeval) (err error) 286 //sysnb Getuid() (uid int) 287 //sys Issetugid() (tainted bool) 288 //sys Kill(pid int, signum syscall.Signal) (err error) 289 //sys Kqueue() (fd int, err error) 290 //sys Lchown(path string, uid int, gid int) (err error) 291 //sys Link(path string, link string) (err error) 292 //sys Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error) 293 //sys Listen(s int, backlog int) (err error) 294 //sys Lstat(path string, stat *Stat_t) (err error) 295 //sys Mkdir(path string, mode uint32) (err error) 296 //sys Mkdirat(dirfd int, path string, mode uint32) (err error) 297 //sys Mkfifo(path string, mode uint32) (err error) 298 //sys Mknod(path string, mode uint32, dev int) (err error) 299 //sys Mknodat(fd int, path string, mode uint32, dev int) (err error) 300 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) 301 //sys Open(path string, mode int, perm uint32) (fd int, err error) 302 //sys Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) 303 //sys Pathconf(path string, name int) (val int, err error) 304 //sys read(fd int, p []byte) (n int, err error) 305 //sys Readlink(path string, buf []byte) (n int, err error) 306 //sys Rename(from string, to string) (err error) 307 //sys Renameat(fromfd int, from string, tofd int, to string) (err error) 308 //sys Revoke(path string) (err error) 309 //sys Rmdir(path string) (err error) 310 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 311 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 312 //sysnb Setegid(egid int) (err error) 313 //sysnb Seteuid(euid int) (err error) 314 //sysnb Setgid(gid int) (err error) 315 //sys Setlogin(name string) (err error) 316 //sysnb Setpgid(pid int, pgid int) (err error) 317 //sys Setpriority(which int, who int, prio int) (err error) 318 //sysnb Setregid(rgid int, egid int) (err error) 319 //sysnb Setreuid(ruid int, euid int) (err error) 320 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) 321 //sysnb Setresuid(ruid int, euid int, suid int) (err error) 322 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 323 //sysnb Setsid() (pid int, err error) 324 //sysnb Settimeofday(tp *Timeval) (err error) 325 //sysnb Setuid(uid int) (err error) 326 //sys Stat(path string, stat *Stat_t) (err error) 327 //sys Statfs(path string, stat *Statfs_t) (err error) 328 //sys Symlink(path string, link string) (err error) 329 //sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error) 330 //sys Sync() (err error) 331 //sys Truncate(path string, length int64) (err error) 332 //sys Umask(newmask int) (oldmask int) 333 //sys Undelete(path string) (err error) 334 //sys Unlink(path string) (err error) 335 //sys Unlinkat(dirfd int, path string, flags int) (err error) 336 //sys Unmount(path string, flags int) (err error) 337 //sys write(fd int, p []byte) (n int, err error) 338 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 339 //sys munmap(addr uintptr, length uintptr) (err error) 340 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 341 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 342 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) 343 //sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) 344 345 /* 346 * Unimplemented 347 * TODO(jsing): Update this list for DragonFly. 348 */ 349 // Profil 350 // Sigaction 351 // Sigprocmask 352 // Getlogin 353 // Sigpending 354 // Sigaltstack 355 // Reboot 356 // Execve 357 // Vfork 358 // Sbrk 359 // Sstk 360 // Ovadvise 361 // Mincore 362 // Setitimer 363 // Swapon 364 // Select 365 // Sigsuspend 366 // Readv 367 // Writev 368 // Nfssvc 369 // Getfh 370 // Quotactl 371 // Mount 372 // Csops 373 // Waitid 374 // Add_profil 375 // Kdebug_trace 376 // Sigreturn 377 // Atsocket 378 // Kqueue_from_portset_np 379 // Kqueue_portset 380 // Getattrlist 381 // Setattrlist 382 // Getdirentriesattr 383 // Searchfs 384 // Delete 385 // Copyfile 386 // Watchevent 387 // Waitevent 388 // Modwatch 389 // Getxattr 390 // Fgetxattr 391 // Setxattr 392 // Fsetxattr 393 // Removexattr 394 // Fremovexattr 395 // Listxattr 396 // Flistxattr 397 // Fsctl 398 // Initgroups 399 // Posix_spawn 400 // Nfsclnt 401 // Fhopen 402 // Minherit 403 // Semsys 404 // Msgsys 405 // Shmsys 406 // Semctl 407 // Semget 408 // Semop 409 // Msgctl 410 // Msgget 411 // Msgsnd 412 // Msgrcv 413 // Shmat 414 // Shmctl 415 // Shmdt 416 // Shmget 417 // Shm_open 418 // Shm_unlink 419 // Sem_open 420 // Sem_close 421 // Sem_unlink 422 // Sem_wait 423 // Sem_trywait 424 // Sem_post 425 // Sem_getvalue 426 // Sem_init 427 // Sem_destroy 428 // Open_extended 429 // Umask_extended 430 // Stat_extended 431 // Lstat_extended 432 // Fstat_extended 433 // Chmod_extended 434 // Fchmod_extended 435 // Access_extended 436 // Settid 437 // Gettid 438 // Setsgroups 439 // Getsgroups 440 // Setwgroups 441 // Getwgroups 442 // Mkfifo_extended 443 // Mkdir_extended 444 // Identitysvc 445 // Shared_region_check_np 446 // Shared_region_map_np 447 // __pthread_mutex_destroy 448 // __pthread_mutex_init 449 // __pthread_mutex_lock 450 // __pthread_mutex_trylock 451 // __pthread_mutex_unlock 452 // __pthread_cond_init 453 // __pthread_cond_destroy 454 // __pthread_cond_broadcast 455 // __pthread_cond_signal 456 // Setsid_with_pid 457 // __pthread_cond_timedwait 458 // Aio_fsync 459 // Aio_return 460 // Aio_suspend 461 // Aio_cancel 462 // Aio_error 463 // Aio_read 464 // Aio_write 465 // Lio_listio 466 // __pthread_cond_wait 467 // Iopolicysys 468 // __pthread_kill 469 // __pthread_sigmask 470 // __sigwait 471 // __disable_threadsignal 472 // __pthread_markcancel 473 // __pthread_canceled 474 // __semwait_signal 475 // Proc_info 476 // Stat64_extended 477 // Lstat64_extended 478 // Fstat64_extended 479 // __pthread_chdir 480 // __pthread_fchdir 481 // Audit 482 // Auditon 483 // Getauid 484 // Setauid 485 // Getaudit 486 // Setaudit 487 // Getaudit_addr 488 // Setaudit_addr 489 // Auditctl 490 // Bsdthread_create 491 // Bsdthread_terminate 492 // Stack_snapshot 493 // Bsdthread_register 494 // Workq_open 495 // Workq_ops 496 // __mac_execve 497 // __mac_syscall 498 // __mac_get_file 499 // __mac_set_file 500 // __mac_get_link 501 // __mac_set_link 502 // __mac_get_proc 503 // __mac_set_proc 504 // __mac_get_fd 505 // __mac_set_fd 506 // __mac_get_pid 507 // __mac_get_lcid 508 // __mac_get_lctx 509 // __mac_set_lctx 510 // Setlcid 511 // Read_nocancel 512 // Write_nocancel 513 // Open_nocancel 514 // Close_nocancel 515 // Wait4_nocancel 516 // Recvmsg_nocancel 517 // Sendmsg_nocancel 518 // Recvfrom_nocancel 519 // Accept_nocancel 520 // Fcntl_nocancel 521 // Select_nocancel 522 // Fsync_nocancel 523 // Connect_nocancel 524 // Sigsuspend_nocancel 525 // Readv_nocancel 526 // Writev_nocancel 527 // Sendto_nocancel 528 // Pread_nocancel 529 // Pwrite_nocancel 530 // Waitid_nocancel 531 // Msgsnd_nocancel 532 // Msgrcv_nocancel 533 // Sem_wait_nocancel 534 // Aio_suspend_nocancel 535 // __sigwait_nocancel 536 // __semwait_signal_nocancel 537 // __mac_mount 538 // __mac_get_mount 539 // __mac_getfsstat 540