github.com/aayushi-bansal/sys@v0.0.0-20180118120756-90d962a959d8/unix/syscall_dragonfly.go (about) 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 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 [12]int8 26 Rcf uint16 27 Route [16]uint16 28 raw RawSockaddrDatalink 29 } 30 31 // Translate "kern.hostname" to []_C_int{0,1,2,3}. 32 func nametomib(name string) (mib []_C_int, err error) { 33 const siz = unsafe.Sizeof(mib[0]) 34 35 // NOTE(rsc): It seems strange to set the buffer to have 36 // size CTL_MAXNAME+2 but use only CTL_MAXNAME 37 // as the size. I don't know why the +2 is here, but the 38 // kernel uses +2 for its own implementation of this function. 39 // I am scared that if we don't include the +2 here, the kernel 40 // will silently write 2 words farther than we specify 41 // and we'll get memory corruption. 42 var buf [CTL_MAXNAME + 2]_C_int 43 n := uintptr(CTL_MAXNAME) * siz 44 45 p := (*byte)(unsafe.Pointer(&buf[0])) 46 bytes, err := ByteSliceFromString(name) 47 if err != nil { 48 return nil, err 49 } 50 51 // Magic sysctl: "setting" 0.3 to a string name 52 // lets you read back the array of integers form. 53 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { 54 return nil, err 55 } 56 return buf[0 : n/siz], nil 57 } 58 59 func direntIno(buf []byte) (uint64, bool) { 60 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno)) 61 } 62 63 func direntReclen(buf []byte) (uint64, bool) { 64 namlen, ok := direntNamlen(buf) 65 if !ok { 66 return 0, false 67 } 68 return (16 + namlen + 1 + 7) &^ 7, true 69 } 70 71 func direntNamlen(buf []byte) (uint64, bool) { 72 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) 73 } 74 75 //sysnb pipe() (r int, w int, err error) 76 77 func Pipe(p []int) (err error) { 78 if len(p) != 2 { 79 return EINVAL 80 } 81 p[0], p[1], err = pipe() 82 return 83 } 84 85 //sys extpread(fd int, p []byte, flags int, offset int64) (n int, err error) 86 func Pread(fd int, p []byte, offset int64) (n int, err error) { 87 return extpread(fd, p, 0, offset) 88 } 89 90 //sys extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error) 91 func Pwrite(fd int, p []byte, offset int64) (n int, err error) { 92 return extpwrite(fd, p, 0, offset) 93 } 94 95 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { 96 var rsa RawSockaddrAny 97 var len _Socklen = SizeofSockaddrAny 98 nfd, err = accept4(fd, &rsa, &len, flags) 99 if err != nil { 100 return 101 } 102 if len > SizeofSockaddrAny { 103 panic("RawSockaddrAny too small") 104 } 105 sa, err = anyToSockaddr(&rsa) 106 if err != nil { 107 Close(nfd) 108 nfd = 0 109 } 110 return 111 } 112 113 const ImplementsGetwd = true 114 115 //sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD 116 117 func Getwd() (string, error) { 118 var buf [PathMax]byte 119 _, err := Getcwd(buf[0:]) 120 if err != nil { 121 return "", err 122 } 123 n := clen(buf[:]) 124 if n < 1 { 125 return "", EINVAL 126 } 127 return string(buf[:n]), nil 128 } 129 130 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 131 var _p0 unsafe.Pointer 132 var bufsize uintptr 133 if len(buf) > 0 { 134 _p0 = unsafe.Pointer(&buf[0]) 135 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 136 } 137 r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) 138 n = int(r0) 139 if e1 != 0 { 140 err = e1 141 } 142 return 143 } 144 145 func setattrlistTimes(path string, times []Timespec, flags int) error { 146 // used on Darwin for UtimesNano 147 return ENOSYS 148 } 149 150 //sys ioctl(fd int, req uint, arg uintptr) (err error) 151 152 // ioctl itself should not be exposed directly, but additional get/set 153 // functions for specific types are permissible. 154 155 // IoctlSetInt performs an ioctl operation which sets an integer value 156 // on fd, using the specified request number. 157 func IoctlSetInt(fd int, req uint, value int) error { 158 return ioctl(fd, req, uintptr(value)) 159 } 160 161 func IoctlSetWinsize(fd int, req uint, value *Winsize) error { 162 return ioctl(fd, req, uintptr(unsafe.Pointer(value))) 163 } 164 165 func IoctlSetTermios(fd int, req uint, value *Termios) error { 166 return ioctl(fd, req, uintptr(unsafe.Pointer(value))) 167 } 168 169 // IoctlGetInt performs an ioctl operation which gets an integer value 170 // from fd, using the specified request number. 171 func IoctlGetInt(fd int, req uint) (int, error) { 172 var value int 173 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 174 return value, err 175 } 176 177 func IoctlGetWinsize(fd int, req uint) (*Winsize, error) { 178 var value Winsize 179 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 180 return &value, err 181 } 182 183 func IoctlGetTermios(fd int, req uint) (*Termios, error) { 184 var value Termios 185 err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) 186 return &value, err 187 } 188 189 func sysctlUname(mib []_C_int, old *byte, oldlen *uintptr) error { 190 err := sysctl(mib, old, oldlen, nil, 0) 191 if err != nil { 192 // Utsname members on Dragonfly are only 32 bytes and 193 // the syscall returns ENOMEM in case the actual value 194 // is longer. 195 if err == ENOMEM { 196 err = nil 197 } 198 } 199 return err 200 } 201 202 func Uname(uname *Utsname) error { 203 mib := []_C_int{CTL_KERN, KERN_OSTYPE} 204 n := unsafe.Sizeof(uname.Sysname) 205 if err := sysctlUname(mib, &uname.Sysname[0], &n); err != nil { 206 return err 207 } 208 uname.Sysname[unsafe.Sizeof(uname.Sysname)-1] = 0 209 210 mib = []_C_int{CTL_KERN, KERN_HOSTNAME} 211 n = unsafe.Sizeof(uname.Nodename) 212 if err := sysctlUname(mib, &uname.Nodename[0], &n); err != nil { 213 return err 214 } 215 uname.Nodename[unsafe.Sizeof(uname.Nodename)-1] = 0 216 217 mib = []_C_int{CTL_KERN, KERN_OSRELEASE} 218 n = unsafe.Sizeof(uname.Release) 219 if err := sysctlUname(mib, &uname.Release[0], &n); err != nil { 220 return err 221 } 222 uname.Release[unsafe.Sizeof(uname.Release)-1] = 0 223 224 mib = []_C_int{CTL_KERN, KERN_VERSION} 225 n = unsafe.Sizeof(uname.Version) 226 if err := sysctlUname(mib, &uname.Version[0], &n); err != nil { 227 return err 228 } 229 230 // The version might have newlines or tabs in it, convert them to 231 // spaces. 232 for i, b := range uname.Version { 233 if b == '\n' || b == '\t' { 234 if i == len(uname.Version)-1 { 235 uname.Version[i] = 0 236 } else { 237 uname.Version[i] = ' ' 238 } 239 } 240 } 241 242 mib = []_C_int{CTL_HW, HW_MACHINE} 243 n = unsafe.Sizeof(uname.Machine) 244 if err := sysctlUname(mib, &uname.Machine[0], &n); err != nil { 245 return err 246 } 247 uname.Machine[unsafe.Sizeof(uname.Machine)-1] = 0 248 249 return nil 250 } 251 252 /* 253 * Exposed directly 254 */ 255 //sys Access(path string, mode uint32) (err error) 256 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 257 //sys Chdir(path string) (err error) 258 //sys Chflags(path string, flags int) (err error) 259 //sys Chmod(path string, mode uint32) (err error) 260 //sys Chown(path string, uid int, gid int) (err error) 261 //sys Chroot(path string) (err error) 262 //sys Close(fd int) (err error) 263 //sys Dup(fd int) (nfd int, err error) 264 //sys Dup2(from int, to int) (err error) 265 //sys Exit(code int) 266 //sys Fchdir(fd int) (err error) 267 //sys Fchflags(fd int, flags int) (err error) 268 //sys Fchmod(fd int, mode uint32) (err error) 269 //sys Fchown(fd int, uid int, gid int) (err error) 270 //sys Flock(fd int, how int) (err error) 271 //sys Fpathconf(fd int, name int) (val int, err error) 272 //sys Fstat(fd int, stat *Stat_t) (err error) 273 //sys Fstatfs(fd int, stat *Statfs_t) (err error) 274 //sys Fsync(fd int) (err error) 275 //sys Ftruncate(fd int, length int64) (err error) 276 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) 277 //sys Getdtablesize() (size int) 278 //sysnb Getegid() (egid int) 279 //sysnb Geteuid() (uid int) 280 //sysnb Getgid() (gid int) 281 //sysnb Getpgid(pid int) (pgid int, err error) 282 //sysnb Getpgrp() (pgrp int) 283 //sysnb Getpid() (pid int) 284 //sysnb Getppid() (ppid int) 285 //sys Getpriority(which int, who int) (prio int, err error) 286 //sysnb Getrlimit(which int, lim *Rlimit) (err error) 287 //sysnb Getrusage(who int, rusage *Rusage) (err error) 288 //sysnb Getsid(pid int) (sid int, err error) 289 //sysnb Gettimeofday(tv *Timeval) (err error) 290 //sysnb Getuid() (uid int) 291 //sys Issetugid() (tainted bool) 292 //sys Kill(pid int, signum syscall.Signal) (err error) 293 //sys Kqueue() (fd int, err error) 294 //sys Lchown(path string, uid int, gid int) (err error) 295 //sys Link(path string, link string) (err error) 296 //sys Listen(s int, backlog int) (err error) 297 //sys Lstat(path string, stat *Stat_t) (err error) 298 //sys Mkdir(path string, mode uint32) (err error) 299 //sys Mkfifo(path string, mode uint32) (err error) 300 //sys Mknod(path string, mode uint32, dev int) (err error) 301 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) 302 //sys Open(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 Revoke(path string) (err error) 308 //sys Rmdir(path string) (err error) 309 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK 310 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) 311 //sysnb Setegid(egid int) (err error) 312 //sysnb Seteuid(euid int) (err error) 313 //sysnb Setgid(gid int) (err error) 314 //sys Setlogin(name string) (err error) 315 //sysnb Setpgid(pid int, pgid int) (err error) 316 //sys Setpriority(which int, who int, prio int) (err error) 317 //sysnb Setregid(rgid int, egid int) (err error) 318 //sysnb Setreuid(ruid int, euid int) (err error) 319 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) 320 //sysnb Setresuid(ruid int, euid int, suid int) (err error) 321 //sysnb Setrlimit(which int, lim *Rlimit) (err error) 322 //sysnb Setsid() (pid int, err error) 323 //sysnb Settimeofday(tp *Timeval) (err error) 324 //sysnb Setuid(uid int) (err error) 325 //sys Stat(path string, stat *Stat_t) (err error) 326 //sys Statfs(path string, stat *Statfs_t) (err error) 327 //sys Symlink(path string, link string) (err error) 328 //sys Sync() (err error) 329 //sys Truncate(path string, length int64) (err error) 330 //sys Umask(newmask int) (oldmask int) 331 //sys Undelete(path string) (err error) 332 //sys Unlink(path string) (err error) 333 //sys Unmount(path string, flags int) (err error) 334 //sys write(fd int, p []byte) (n int, err error) 335 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) 336 //sys munmap(addr uintptr, length uintptr) (err error) 337 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ 338 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE 339 //sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) 340 //sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) 341 342 /* 343 * Unimplemented 344 * TODO(jsing): Update this list for DragonFly. 345 */ 346 // Profil 347 // Sigaction 348 // Sigprocmask 349 // Getlogin 350 // Sigpending 351 // Sigaltstack 352 // Reboot 353 // Execve 354 // Vfork 355 // Sbrk 356 // Sstk 357 // Ovadvise 358 // Mincore 359 // Setitimer 360 // Swapon 361 // Select 362 // Sigsuspend 363 // Readv 364 // Writev 365 // Nfssvc 366 // Getfh 367 // Quotactl 368 // Mount 369 // Csops 370 // Waitid 371 // Add_profil 372 // Kdebug_trace 373 // Sigreturn 374 // Atsocket 375 // Kqueue_from_portset_np 376 // Kqueue_portset 377 // Getattrlist 378 // Setattrlist 379 // Getdirentriesattr 380 // Searchfs 381 // Delete 382 // Copyfile 383 // Watchevent 384 // Waitevent 385 // Modwatch 386 // Getxattr 387 // Fgetxattr 388 // Setxattr 389 // Fsetxattr 390 // Removexattr 391 // Fremovexattr 392 // Listxattr 393 // Flistxattr 394 // Fsctl 395 // Initgroups 396 // Posix_spawn 397 // Nfsclnt 398 // Fhopen 399 // Minherit 400 // Semsys 401 // Msgsys 402 // Shmsys 403 // Semctl 404 // Semget 405 // Semop 406 // Msgctl 407 // Msgget 408 // Msgsnd 409 // Msgrcv 410 // Shmat 411 // Shmctl 412 // Shmdt 413 // Shmget 414 // Shm_open 415 // Shm_unlink 416 // Sem_open 417 // Sem_close 418 // Sem_unlink 419 // Sem_wait 420 // Sem_trywait 421 // Sem_post 422 // Sem_getvalue 423 // Sem_init 424 // Sem_destroy 425 // Open_extended 426 // Umask_extended 427 // Stat_extended 428 // Lstat_extended 429 // Fstat_extended 430 // Chmod_extended 431 // Fchmod_extended 432 // Access_extended 433 // Settid 434 // Gettid 435 // Setsgroups 436 // Getsgroups 437 // Setwgroups 438 // Getwgroups 439 // Mkfifo_extended 440 // Mkdir_extended 441 // Identitysvc 442 // Shared_region_check_np 443 // Shared_region_map_np 444 // __pthread_mutex_destroy 445 // __pthread_mutex_init 446 // __pthread_mutex_lock 447 // __pthread_mutex_trylock 448 // __pthread_mutex_unlock 449 // __pthread_cond_init 450 // __pthread_cond_destroy 451 // __pthread_cond_broadcast 452 // __pthread_cond_signal 453 // Setsid_with_pid 454 // __pthread_cond_timedwait 455 // Aio_fsync 456 // Aio_return 457 // Aio_suspend 458 // Aio_cancel 459 // Aio_error 460 // Aio_read 461 // Aio_write 462 // Lio_listio 463 // __pthread_cond_wait 464 // Iopolicysys 465 // __pthread_kill 466 // __pthread_sigmask 467 // __sigwait 468 // __disable_threadsignal 469 // __pthread_markcancel 470 // __pthread_canceled 471 // __semwait_signal 472 // Proc_info 473 // Stat64_extended 474 // Lstat64_extended 475 // Fstat64_extended 476 // __pthread_chdir 477 // __pthread_fchdir 478 // Audit 479 // Auditon 480 // Getauid 481 // Setauid 482 // Getaudit 483 // Setaudit 484 // Getaudit_addr 485 // Setaudit_addr 486 // Auditctl 487 // Bsdthread_create 488 // Bsdthread_terminate 489 // Stack_snapshot 490 // Bsdthread_register 491 // Workq_open 492 // Workq_ops 493 // __mac_execve 494 // __mac_syscall 495 // __mac_get_file 496 // __mac_set_file 497 // __mac_get_link 498 // __mac_set_link 499 // __mac_get_proc 500 // __mac_set_proc 501 // __mac_get_fd 502 // __mac_set_fd 503 // __mac_get_pid 504 // __mac_get_lcid 505 // __mac_get_lctx 506 // __mac_set_lctx 507 // Setlcid 508 // Read_nocancel 509 // Write_nocancel 510 // Open_nocancel 511 // Close_nocancel 512 // Wait4_nocancel 513 // Recvmsg_nocancel 514 // Sendmsg_nocancel 515 // Recvfrom_nocancel 516 // Accept_nocancel 517 // Fcntl_nocancel 518 // Select_nocancel 519 // Fsync_nocancel 520 // Connect_nocancel 521 // Sigsuspend_nocancel 522 // Readv_nocancel 523 // Writev_nocancel 524 // Sendto_nocancel 525 // Pread_nocancel 526 // Pwrite_nocancel 527 // Waitid_nocancel 528 // Msgsnd_nocancel 529 // Msgrcv_nocancel 530 // Sem_wait_nocancel 531 // Aio_suspend_nocancel 532 // __sigwait_nocancel 533 // __semwait_signal_nocancel 534 // __mac_mount 535 // __mac_get_mount 536 // __mac_getfsstat