sysdeps/unix/sysv/linux/fstatfs64.c

   1 /* Return information about the filesystem on which FD resides.
   2    Copyright (C) 1996-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <string.h>
  21 #include <sys/statfs.h>
  22 #include <stddef.h>
  23 #include <sysdep.h>
  24 #include <kernel-features.h>
  25
  26 /* Defined in statfs64.c.  */
  27 extern int __no_statfs64 attribute_hidden;
  28
  29 /* Return information about the filesystem on which FD resides.  */
  30 int
  31 __fstatfs64 (int fd, struct statfs64 *buf)
  32 {
  33 #ifdef __NR_fstatfs64
  34 # if __ASSUME_STATFS64 == 0
  35   if (! __no_statfs64)
  36 # endif
  37     {
  38       int result = INLINE_SYSCALL (fstatfs64, 3, fd, sizeof (*buf), buf);
  39
  40 # if __ASSUME_STATFS64 == 0
  41       if (result == 0 || errno != ENOSYS)
  42 # endif
  43         return result;
  44
  45 # if __ASSUME_STATFS64 == 0
  46       __no_statfs64 = 1;
  47 # endif
  48     }
  49 #endif
  50
  51 #if __ASSUME_STATFS64 == 0
  52   struct statfs buf32;
  53
  54   if (__fstatfs (fd, &buf32) < 0)
  55     return -1;
  56
  57   buf->f_type = buf32.f_type;
  58   buf->f_bsize = buf32.f_bsize;
  59   buf->f_blocks = buf32.f_blocks;
  60   buf->f_bfree = buf32.f_bfree;
  61   buf->f_bavail = buf32.f_bavail;
  62   buf->f_files = buf32.f_files;
  63   buf->f_ffree = buf32.f_ffree;
  64   buf->f_fsid = buf32.f_fsid;
  65   buf->f_namelen = buf32.f_namelen;
  66   buf->f_frsize = buf32.f_frsize;
  67   memcpy (buf->f_spare, buf32.f_spare, sizeof (buf32.f_spare));
  68
  69   return 0;
  70 #endif
  71 }
  72 weak_alias (__fstatfs64, fstatfs64)