github.com/Andyfoo/golang/x/sys@v0.0.0-20190901054642-57c1bf301704/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  // 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  func direntIno(buf []byte) (uint64, bool) {
    61  	return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
    62  }
    63  
    64  func direntReclen(buf []byte) (uint64, bool) {
    65  	namlen, ok := direntNamlen(buf)
    66  	if !ok {
    67  		return 0, false
    68  	}
    69  	return (16 + namlen + 1 + 7) &^ 7, true
    70  }
    71  
    72  func direntNamlen(buf []byte) (uint64, bool) {
    73  	return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
    74  }
    75  
    76  //sysnb pipe() (r int, w int, err error)
    77  
    78  func Pipe(p []int) (err error) {
    79  	if len(p) != 2 {
    80  		return EINVAL
    81  	}
    82  	p[0], p[1], err = pipe()
    83  	return
    84  }
    85  
    86  //sys	extpread(fd int, p []byte, flags int, offset int64) (n int, err error)
    87  func Pread(fd int, p []byte, offset int64) (n int, err error) {
    88  	return extpread(fd, p, 0, offset)
    89  }
    90  
    91  //sys	extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error)
    92  func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
    93  	return extpwrite(fd, p, 0, offset)
    94  }
    95  
    96  func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
    97  	var rsa RawSockaddrAny
    98  	var len _Socklen = SizeofSockaddrAny
    99  	nfd, err = accept4(fd, &rsa, &len, flags)
   100  	if err != nil {
   101  		return
   102  	}
   103  	if len > SizeofSockaddrAny {
   104  		panic("RawSockaddrAny too small")
   105  	}
   106  	sa, err = anyToSockaddr(fd, &rsa)
   107  	if err != nil {
   108  		Close(nfd)
   109  		nfd = 0
   110  	}
   111  	return
   112  }
   113  
   114  const ImplementsGetwd = true
   115  
   116  //sys	Getcwd(buf []byte) (n int, err error) = SYS___GETCWD
   117  
   118  func Getwd() (string, error) {
   119  	var buf [PathMax]byte
   120  	_, err := Getcwd(buf[0:])
   121  	if err != nil {
   122  		return "", err
   123  	}
   124  	n := clen(buf[:])
   125  	if n < 1 {
   126  		return "", EINVAL
   127  	}
   128  	return string(buf[:n]), nil
   129  }
   130  
   131  func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
   132  	var _p0 unsafe.Pointer
   133  	var bufsize uintptr
   134  	if len(buf) > 0 {
   135  		_p0 = unsafe.Pointer(&buf[0])
   136  		bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
   137  	}
   138  	r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags))
   139  	n = int(r0)
   140  	if e1 != 0 {
   141  		err = e1
   142  	}
   143  	return
   144  }
   145  
   146  func setattrlistTimes(path string, times []Timespec, flags int) error {
   147  	// used on Darwin for UtimesNano
   148  	return ENOSYS
   149  }
   150  
   151  //sys	ioctl(fd int, req uint, arg uintptr) (err error)
   152  
   153  func sysctlUname(mib []_C_int, old *byte, oldlen *uintptr) error {
   154  	err := sysctl(mib, old, oldlen, nil, 0)
   155  	if err != nil {
   156  		// Utsname members on Dragonfly are only 32 bytes and
   157  		// the syscall returns ENOMEM in case the actual value
   158  		// is longer.
   159  		if err == ENOMEM {
   160  			err = nil
   161  		}
   162  	}
   163  	return err
   164  }
   165  
   166  func Uname(uname *Utsname) error {
   167  	mib := []_C_int{CTL_KERN, KERN_OSTYPE}
   168  	n := unsafe.Sizeof(uname.Sysname)
   169  	if err := sysctlUname(mib, &uname.Sysname[0], &n); err != nil {
   170  		return err
   171  	}
   172  	uname.Sysname[unsafe.Sizeof(uname.Sysname)-1] = 0
   173  
   174  	mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
   175  	n = unsafe.Sizeof(uname.Nodename)
   176  	if err := sysctlUname(mib, &uname.Nodename[0], &n); err != nil {
   177  		return err
   178  	}
   179  	uname.Nodename[unsafe.Sizeof(uname.Nodename)-1] = 0
   180  
   181  	mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
   182  	n = unsafe.Sizeof(uname.Release)
   183  	if err := sysctlUname(mib, &uname.Release[0], &n); err != nil {
   184  		return err
   185  	}
   186  	uname.Release[unsafe.Sizeof(uname.Release)-1] = 0
   187  
   188  	mib = []_C_int{CTL_KERN, KERN_VERSION}
   189  	n = unsafe.Sizeof(uname.Version)
   190  	if err := sysctlUname(mib, &uname.Version[0], &n); err != nil {
   191  		return err
   192  	}
   193  
   194  	// The version might have newlines or tabs in it, convert them to
   195  	// spaces.
   196  	for i, b := range uname.Version {
   197  		if b == '\n' || b == '\t' {
   198  			if i == len(uname.Version)-1 {
   199  				uname.Version[i] = 0
   200  			} else {
   201  				uname.Version[i] = ' '
   202  			}
   203  		}
   204  	}
   205  
   206  	mib = []_C_int{CTL_HW, HW_MACHINE}
   207  	n = unsafe.Sizeof(uname.Machine)
   208  	if err := sysctlUname(mib, &uname.Machine[0], &n); err != nil {
   209  		return err
   210  	}
   211  	uname.Machine[unsafe.Sizeof(uname.Machine)-1] = 0
   212  
   213  	return nil
   214  }
   215  
   216  func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
   217  	if raceenabled {
   218  		raceReleaseMerge(unsafe.Pointer(&ioSync))
   219  	}
   220  	return sendfile(outfd, infd, offset, count)
   221  }
   222  
   223  /*
   224   * Exposed directly
   225   */
   226  //sys	Access(path string, mode uint32) (err error)
   227  //sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
   228  //sys	Chdir(path string) (err error)
   229  //sys	Chflags(path string, flags int) (err error)
   230  //sys	Chmod(path string, mode uint32) (err error)
   231  //sys	Chown(path string, uid int, gid int) (err error)
   232  //sys	Chroot(path string) (err error)
   233  //sys	Close(fd int) (err error)
   234  //sys	Dup(fd int) (nfd int, err error)
   235  //sys	Dup2(from int, to int) (err error)
   236  //sys	Exit(code int)
   237  //sys	Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
   238  //sys	Fchdir(fd int) (err error)
   239  //sys	Fchflags(fd int, flags int) (err error)
   240  //sys	Fchmod(fd int, mode uint32) (err error)
   241  //sys	Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
   242  //sys	Fchown(fd int, uid int, gid int) (err error)
   243  //sys	Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
   244  //sys	Flock(fd int, how int) (err error)
   245  //sys	Fpathconf(fd int, name int) (val int, err error)
   246  //sys	Fstat(fd int, stat *Stat_t) (err error)
   247  //sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
   248  //sys	Fstatfs(fd int, stat *Statfs_t) (err error)
   249  //sys	Fsync(fd int) (err error)
   250  //sys	Ftruncate(fd int, length int64) (err error)
   251  //sys	Getdents(fd int, buf []byte) (n int, err error)
   252  //sys	Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error)
   253  //sys	Getdtablesize() (size int)
   254  //sysnb	Getegid() (egid int)
   255  //sysnb	Geteuid() (uid int)
   256  //sysnb	Getgid() (gid int)
   257  //sysnb	Getpgid(pid int) (pgid int, err error)
   258  //sysnb	Getpgrp() (pgrp int)
   259  //sysnb	Getpid() (pid int)
   260  //sysnb	Getppid() (ppid int)
   261  //sys	Getpriority(which int, who int) (prio int, err error)
   262  //sysnb	Getrlimit(which int, lim *Rlimit) (err error)
   263  //sysnb	Getrusage(who int, rusage *Rusage) (err error)
   264  //sysnb	Getsid(pid int) (sid int, err error)
   265  //sysnb	Gettimeofday(tv *Timeval) (err error)
   266  //sysnb	Getuid() (uid int)
   267  //sys	Issetugid() (tainted bool)
   268  //sys	Kill(pid int, signum syscall.Signal) (err error)
   269  //sys	Kqueue() (fd int, err error)
   270  //sys	Lchown(path string, uid int, gid int) (err error)
   271  //sys	Link(path string, link string) (err error)
   272  //sys	Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)
   273  //sys	Listen(s int, backlog int) (err error)
   274  //sys	Lstat(path string, stat *Stat_t) (err error)
   275  //sys	Mkdir(path string, mode uint32) (err error)
   276  //sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
   277  //sys	Mkfifo(path string, mode uint32) (err error)
   278  //sys	Mknod(path string, mode uint32, dev int) (err error)
   279  //sys	Mknodat(fd int, path string, mode uint32, dev int) (err error)
   280  //sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)
   281  //sys	Open(path string, mode int, perm uint32) (fd int, err error)
   282  //sys	Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error)
   283  //sys	Pathconf(path string, name int) (val int, err error)
   284  //sys	read(fd int, p []byte) (n int, err error)
   285  //sys	Readlink(path string, buf []byte) (n int, err error)
   286  //sys	Rename(from string, to string) (err error)
   287  //sys	Renameat(fromfd int, from string, tofd int, to string) (err error)
   288  //sys	Revoke(path string) (err error)
   289  //sys	Rmdir(path string) (err error)
   290  //sys	Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
   291  //sys	Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error)
   292  //sysnb	Setegid(egid int) (err error)
   293  //sysnb	Seteuid(euid int) (err error)
   294  //sysnb	Setgid(gid int) (err error)
   295  //sys	Setlogin(name string) (err error)
   296  //sysnb	Setpgid(pid int, pgid int) (err error)
   297  //sys	Setpriority(which int, who int, prio int) (err error)
   298  //sysnb	Setregid(rgid int, egid int) (err error)
   299  //sysnb	Setreuid(ruid int, euid int) (err error)
   300  //sysnb	Setresgid(rgid int, egid int, sgid int) (err error)
   301  //sysnb	Setresuid(ruid int, euid int, suid int) (err error)
   302  //sysnb	Setrlimit(which int, lim *Rlimit) (err error)
   303  //sysnb	Setsid() (pid int, err error)
   304  //sysnb	Settimeofday(tp *Timeval) (err error)
   305  //sysnb	Setuid(uid int) (err error)
   306  //sys	Stat(path string, stat *Stat_t) (err error)
   307  //sys	Statfs(path string, stat *Statfs_t) (err error)
   308  //sys	Symlink(path string, link string) (err error)
   309  //sys	Symlinkat(oldpath string, newdirfd int, newpath string) (err error)
   310  //sys	Sync() (err error)
   311  //sys	Truncate(path string, length int64) (err error)
   312  //sys	Umask(newmask int) (oldmask int)
   313  //sys	Undelete(path string) (err error)
   314  //sys	Unlink(path string) (err error)
   315  //sys	Unlinkat(dirfd int, path string, flags int) (err error)
   316  //sys	Unmount(path string, flags int) (err error)
   317  //sys	write(fd int, p []byte) (n int, err error)
   318  //sys   mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
   319  //sys   munmap(addr uintptr, length uintptr) (err error)
   320  //sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
   321  //sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
   322  //sys	accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
   323  //sys	utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
   324  
   325  /*
   326   * Unimplemented
   327   * TODO(jsing): Update this list for DragonFly.
   328   */
   329  // Profil
   330  // Sigaction
   331  // Sigprocmask
   332  // Getlogin
   333  // Sigpending
   334  // Sigaltstack
   335  // Reboot
   336  // Execve
   337  // Vfork
   338  // Sbrk
   339  // Sstk
   340  // Ovadvise
   341  // Mincore
   342  // Setitimer
   343  // Swapon
   344  // Select
   345  // Sigsuspend
   346  // Readv
   347  // Writev
   348  // Nfssvc
   349  // Getfh
   350  // Quotactl
   351  // Mount
   352  // Csops
   353  // Waitid
   354  // Add_profil
   355  // Kdebug_trace
   356  // Sigreturn
   357  // Atsocket
   358  // Kqueue_from_portset_np
   359  // Kqueue_portset
   360  // Getattrlist
   361  // Setattrlist
   362  // Getdirentriesattr
   363  // Searchfs
   364  // Delete
   365  // Copyfile
   366  // Watchevent
   367  // Waitevent
   368  // Modwatch
   369  // Getxattr
   370  // Fgetxattr
   371  // Setxattr
   372  // Fsetxattr
   373  // Removexattr
   374  // Fremovexattr
   375  // Listxattr
   376  // Flistxattr
   377  // Fsctl
   378  // Initgroups
   379  // Posix_spawn
   380  // Nfsclnt
   381  // Fhopen
   382  // Minherit
   383  // Semsys
   384  // Msgsys
   385  // Shmsys
   386  // Semctl
   387  // Semget
   388  // Semop
   389  // Msgctl
   390  // Msgget
   391  // Msgsnd
   392  // Msgrcv
   393  // Shmat
   394  // Shmctl
   395  // Shmdt
   396  // Shmget
   397  // Shm_open
   398  // Shm_unlink
   399  // Sem_open
   400  // Sem_close
   401  // Sem_unlink
   402  // Sem_wait
   403  // Sem_trywait
   404  // Sem_post
   405  // Sem_getvalue
   406  // Sem_init
   407  // Sem_destroy
   408  // Open_extended
   409  // Umask_extended
   410  // Stat_extended
   411  // Lstat_extended
   412  // Fstat_extended
   413  // Chmod_extended
   414  // Fchmod_extended
   415  // Access_extended
   416  // Settid
   417  // Gettid
   418  // Setsgroups
   419  // Getsgroups
   420  // Setwgroups
   421  // Getwgroups
   422  // Mkfifo_extended
   423  // Mkdir_extended
   424  // Identitysvc
   425  // Shared_region_check_np
   426  // Shared_region_map_np
   427  // __pthread_mutex_destroy
   428  // __pthread_mutex_init
   429  // __pthread_mutex_lock
   430  // __pthread_mutex_trylock
   431  // __pthread_mutex_unlock
   432  // __pthread_cond_init
   433  // __pthread_cond_destroy
   434  // __pthread_cond_broadcast
   435  // __pthread_cond_signal
   436  // Setsid_with_pid
   437  // __pthread_cond_timedwait
   438  // Aio_fsync
   439  // Aio_return
   440  // Aio_suspend
   441  // Aio_cancel
   442  // Aio_error
   443  // Aio_read
   444  // Aio_write
   445  // Lio_listio
   446  // __pthread_cond_wait
   447  // Iopolicysys
   448  // __pthread_kill
   449  // __pthread_sigmask
   450  // __sigwait
   451  // __disable_threadsignal
   452  // __pthread_markcancel
   453  // __pthread_canceled
   454  // __semwait_signal
   455  // Proc_info
   456  // Stat64_extended
   457  // Lstat64_extended
   458  // Fstat64_extended
   459  // __pthread_chdir
   460  // __pthread_fchdir
   461  // Audit
   462  // Auditon
   463  // Getauid
   464  // Setauid
   465  // Getaudit
   466  // Setaudit
   467  // Getaudit_addr
   468  // Setaudit_addr
   469  // Auditctl
   470  // Bsdthread_create
   471  // Bsdthread_terminate
   472  // Stack_snapshot
   473  // Bsdthread_register
   474  // Workq_open
   475  // Workq_ops
   476  // __mac_execve
   477  // __mac_syscall
   478  // __mac_get_file
   479  // __mac_set_file
   480  // __mac_get_link
   481  // __mac_set_link
   482  // __mac_get_proc
   483  // __mac_set_proc
   484  // __mac_get_fd
   485  // __mac_set_fd
   486  // __mac_get_pid
   487  // __mac_get_lcid
   488  // __mac_get_lctx
   489  // __mac_set_lctx
   490  // Setlcid
   491  // Read_nocancel
   492  // Write_nocancel
   493  // Open_nocancel
   494  // Close_nocancel
   495  // Wait4_nocancel
   496  // Recvmsg_nocancel
   497  // Sendmsg_nocancel
   498  // Recvfrom_nocancel
   499  // Accept_nocancel
   500  // Fcntl_nocancel
   501  // Select_nocancel
   502  // Fsync_nocancel
   503  // Connect_nocancel
   504  // Sigsuspend_nocancel
   505  // Readv_nocancel
   506  // Writev_nocancel
   507  // Sendto_nocancel
   508  // Pread_nocancel
   509  // Pwrite_nocancel
   510  // Waitid_nocancel
   511  // Msgsnd_nocancel
   512  // Msgrcv_nocancel
   513  // Sem_wait_nocancel
   514  // Aio_suspend_nocancel
   515  // __sigwait_nocancel
   516  // __semwait_signal_nocancel
   517  // __mac_mount
   518  // __mac_get_mount
   519  // __mac_getfsstat