libgo/go/syscall/syscall_freebsd.go

   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 package syscall
   6
   7 import (
   8         "sync"
   9         "unsafe"
  10 )
  11
  12 const (
  13         _SYS_FSTAT_FREEBSD12         = 551 // { int fstat(int fd, _Out_ struct stat *sb); }
  14         _SYS_FSTATAT_FREEBSD12       = 552 // { int fstatat(int fd, _In_z_ char *path, _Out_ struct stat *buf, int flag); }
  15         _SYS_GETDIRENTRIES_FREEBSD12 = 554 // { ssize_t getdirentries(int fd, _Out_writes_bytes_(count) char *buf, size_t count, _Out_ off_t *basep); }
  16         _SYS_STATFS_FREEBSD12        = 555 // { int statfs(_In_z_ char *path, _Out_ struct statfs *buf); }
  17         _SYS_FSTATFS_FREEBSD12       = 556 // { int fstatfs(int fd, _Out_ struct statfs *buf); }
  18         _SYS_GETFSSTAT_FREEBSD12     = 557 // { int getfsstat(_Out_writes_bytes_opt_(bufsize) struct statfs *buf, long bufsize, int mode); }
  19         _SYS_MKNODAT_FREEBSD12       = 559 // { int mknodat(int fd, _In_z_ char *path, mode_t mode, dev_t dev); }
  20 )
  21
  22 // See https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/versions.html.
  23 var (
  24         osreldateOnce sync.Once
  25         osreldate     uint32
  26 )
  27
  28 // INO64_FIRST from /usr/src/lib/libc/sys/compat-ino64.h
  29 const _ino64First = 1200031
  30
  31 func supportsABI(ver uint32) bool {
  32         osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
  33         return osreldate >= ver
  34 }
  35
  36 func direntIno(buf []byte) (uint64, bool) {
  37         return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
  38 }
  39
  40 func direntReclen(buf []byte) (uint64, bool) {
  41         return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
  42 }
  43
  44 func direntNamlen(buf []byte) (uint64, bool) {
  45         return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
  46 }