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 13package unix 14 15import ( 16 "sync" 17 "unsafe" 18) 19 20// See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h 21var ( 22 osreldateOnce sync.Once 23 osreldate uint32 24) 25 26// First __DragonFly_version after September 2019 ABI changes 27// http://lists.dragonflybsd.org/pipermail/users/2019-September/358280.html 28const _dragonflyABIChangeVersion = 500705 29 30func supportsABI(ver uint32) bool { 31 osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") }) 32 return osreldate >= ver 33} 34 35// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets. 36type SockaddrDatalink struct { 37 Len uint8 38 Family uint8 39 Index uint16 40 Type uint8 41 Nlen uint8 42 Alen uint8 43 Slen uint8 44 Data [12]int8 45 Rcf uint16 46 Route [16]uint16 47 raw RawSockaddrDatalink 48} 49 50// Translate "kern.hostname" to []_C_int{0,1,2,3}. 51func nametomib(name string) (mib []_C_int, err error) { 52 const siz = unsafe.Sizeof(mib[0]) 53 54 // NOTE(rsc): It seems strange to set the buffer to have 55 // size CTL_MAXNAME+2 but use only CTL_MAXNAME 56 // as the size. I don't know why the +2 is here, but the 57 // kernel uses +2 for its own implementation of this function. 58 // I am scared that if we don't include the +2 here, the kernel 59 // will silently write 2 words farther than we specify 60 // and we'll get memory corruption. 61 var buf [CTL_MAXNAME + 2]_C_int 62 n := uintptr(CTL_MAXNAME) * siz 63 64 p := (*byte)(unsafe.Pointer(&buf[0])) 65 bytes, err := ByteSliceFromString(name) 66 if err != nil { 67 return nil, err 68 } 69 70 // Magic sysctl: "setting" 0.3 to a string name 71 // lets you read back the array of integers form. 72 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { 73 return nil, err 74 } 75 return buf[0 : n/siz], nil 76} 77 78func direntIno(buf []byte) (uint64, bool) { 79 return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno)) 80} 81 82func direntReclen(buf []byte) (uint64, bool) { 83 namlen, ok := direntNamlen(buf) 84 if !ok { 85 return 0, false 86 } 87 return (16 + namlen + 1 + 7) &^ 7, true 88} 89 90func direntNamlen(buf []byte) (uint64, bool) { 91 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) 92} 93 94//sysnb pipe() (r int, w int, err error) 95 96func Pipe(p []int) (err error) { 97 if len(p) != 2 { 98 return EINVAL 99 } 100 p[0], p[1], err = pipe() 101 return 102} 103 104//sys extpread(fd int, p []byte, flags int, offset int64) (n int, err error) 105func Pread(fd int, p []byte, offset int64) (n int, err error) { 106 return extpread(fd, p, 0, offset) 107} 108 109//sys extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error) 110func Pwrite(fd int, p []byte, offset int64) (n int, err error) { 111 return extpwrite(fd, p, 0, offset) 112} 113 114func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { 115 var rsa RawSockaddrAny 116 var len _Socklen = SizeofSockaddrAny 117 nfd, err = accept4(fd, &rsa, &len, flags) 118 if err != nil { 119 return 120 } 121 if len > SizeofSockaddrAny { 122 panic("RawSockaddrAny too small") 123 } 124 sa, err = anyToSockaddr(fd, &rsa) 125 if err != nil { 126 Close(nfd) 127 nfd = 0 128 } 129 return 130} 131 132const ImplementsGetwd = true 133 134//sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD 135 136func Getwd() (string, error) { 137 var buf [PathMax]byte 138 _, err := Getcwd(buf[0:]) 139 if err != nil { 140 return "", err 141 } 142 n := clen(buf[:]) 143 if n < 1 { 144 return "", EINVAL 145 } 146 return string(buf[:n]), nil 147} 148 149func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { 150 var _p0 unsafe.Pointer 151 var bufsize uintptr 152 if len(buf) > 0 { 153 _p0 = unsafe.Pointer(&buf[0]) 154 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) 155 } 156 r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) 157 n = int(r0) 158 if e1 != 0 { 159 err = e1 160 } 161 return 162} 163 164func setattrlistTimes(path string, times []Timespec, flags int) error { 165 // used on Darwin for UtimesNano 166 return ENOSYS 167} 168 169//sys ioctl(fd int, req uint, arg uintptr) (err error) 170 171//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL 172 173func sysctlUname(mib []_C_int, old *byte, oldlen *uintptr) error { 174 err := sysctl(mib, old, oldlen, nil, 0) 175 if err != nil { 176 // Utsname members on Dragonfly are only 32 bytes and 177 // the syscall returns ENOMEM in case the actual value 178 // is longer. 179 if err == ENOMEM { 180 err = nil 181 } 182 } 183 return err 184} 185 186func Uname(uname *Utsname) error { 187 mib := []_C_int{CTL_KERN, KERN_OSTYPE} 188 n := unsafe.Sizeof(uname.Sysname) 189 if err := sysctlUname(mib, &uname.Sysname[0], &n); err != nil { 190 return err 191 } 192 uname.Sysname[unsafe.Sizeof(uname.Sysname)-1] = 0 193 194 mib = []_C_int{CTL_KERN, KERN_HOSTNAME} 195 n = unsafe.Sizeof(uname.Nodename) 196 if err := sysctlUname(mib, &uname.Nodename[0], &n); err != nil { 197 return err 198 } 199 uname.Nodename[unsafe.Sizeof(uname.Nodename)-1] = 0 200 201 mib = []_C_int{CTL_KERN, KERN_OSRELEASE} 202 n = unsafe.Sizeof(uname.Release) 203 if err := sysctlUname(mib, &uname.Release[0], &n); err != nil { 204 return err 205 } 206 uname.Release[unsafe.Sizeof(uname.Release)-1] = 0 207 208 mib = []_C_int{CTL_KERN, KERN_VERSION} 209 n = unsafe.Sizeof(uname.Version) 210 if err := sysctlUname(mib, &uname.Version[0], &n); err != nil { 211 return err 212 } 213 214 // The version might have newlines or tabs in it, convert them to 215 // spaces. 216 for i, b := range uname.Version { 217 if b == '\n' || b == '\t' { 218 if i == len(uname.Version)-1 { 219 uname.Version[i] = 0 220 } else { 221 uname.Version[i] = ' ' 222 } 223 } 224 } 225 226 mib = []_C_int{CTL_HW, HW_MACHINE} 227 n = unsafe.Sizeof(uname.Machine) 228 if err := sysctlUname(mib, &uname.Machine[0], &n); err != nil { 229 return err 230 } 231 uname.Machine[unsafe.Sizeof(uname.Machine)-1] = 0 232 233 return nil 234} 235 236func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { 237 if raceenabled { 238 raceReleaseMerge(unsafe.Pointer(&ioSync)) 239 } 240 return sendfile(outfd, infd, offset, count) 241} 242 243/* 244 * Exposed directly 245 */ 246//sys Access(path string, mode uint32) (err error) 247//sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) 248//sys Chdir(path string) (err error) 249//sys Chflags(path string, flags int) (err error) 250//sys Chmod(path string, mode uint32) (err error) 251//sys Chown(path string, uid int, gid int) (err error) 252//sys Chroot(path string) (err error) 253//sys Close(fd int) (err error) 254//sys Dup(fd int) (nfd int, err error) 255//sys Dup2(from int, to int) (err error) 256//sys Exit(code int) 257//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) 258//sys Fchdir(fd int) (err error) 259//sys Fchflags(fd int, flags int) (err error) 260//sys Fchmod(fd int, mode uint32) (err error) 261//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) 262//sys Fchown(fd int, uid int, gid int) (err error) 263//sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) 264//sys Flock(fd int, how int) (err error) 265//sys Fpathconf(fd int, name int) (val int, err error) 266//sys Fstat(fd int, stat *Stat_t) (err error) 267//sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) 268//sys Fstatfs(fd int, stat *Statfs_t) (err error) 269//sys Fsync(fd int) (err error) 270//sys Ftruncate(fd int, length int64) (err error) 271//sys Getdents(fd int, buf []byte) (n int, 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(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, 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