libgo/syscalls/sysfile_linux.go

   1 // sysfile_linux.go -- Linux specific file handling.
   2
   3 // Copyright 2010 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 // Support for basic Unix file operations.  This file simply
   8 // translates from Go data types to Unix data types, and handles
   9 // errno.  FIXME: This could probably be done mechanically.
  10
  11 package syscall
  12
  13 const OS = "linux"
  14
  15 func libc_pread(fd int, buf *byte, count Size_t, offset Offset_t) Ssize_t __asm__ ("pread64")
  16 func libc_pwrite(fd int, buf *byte, count Size_t, offset Offset_t) Ssize_t __asm__ ("pwrite64")
  17 func libc_lseek64(int, Offset_t, int) Offset_t __asm__ ("lseek64")
  18 func libc_truncate64(path *byte, length Offset_t) int __asm__ ("truncate64")
  19 func libc_ftruncate64(fd int, length Offset_t) int __asm__ ("ftruncate64")
  20 func libc_setgroups(size Size_t, list *Gid_t) int __asm__ ("setgroups")
  21
  22 func Sleep(nsec int64) (errno int) {
  23         tv := NsecToTimeval(nsec);
  24         n, err := Select(0, nil, nil, nil, &tv);
  25         return err;
  26 }
  27
  28 func Setgroups(gids []int) (errno int) {
  29         if len(gids) == 0 {
  30                 return libc_setgroups(0, nil);
  31         }
  32
  33         a := make([]Gid_t, len(gids));
  34         for i, v := range gids {
  35                 a[i] = Gid_t(v);
  36         }
  37         return libc_setgroups(Size_t(len(a)), &a[0]);
  38 }