sysdeps/unix/sysv/linux/fstatfs64.c

   1 /* Return information about the filesystem on which FD resides.
   2    Copyright (C) 1996,1997,1998,1999,2000,2003,2007
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <errno.h>
  22 #include <string.h>
  23 #include <sys/statfs.h>
  24 #include <stddef.h>
  25 #include <sysdep.h>
  26 #include <kernel-features.h>
  27
  28 /* Defined in statfs64.c.  */
  29 extern int __no_statfs64 attribute_hidden;
  30
  31 /* Return information about the filesystem on which FD resides.  */
  32 int
  33 __fstatfs64 (int fd, struct statfs64 *buf)
  34 {
  35 #ifdef __NR_fstatfs64
  36 # if __ASSUME_STATFS64 == 0
  37   if (! __no_statfs64)
  38 # endif
  39     {
  40       int result = INLINE_SYSCALL (fstatfs64, 3, fd, sizeof (*buf), buf);
  41
  42 # if __ASSUME_STATFS64 == 0
  43       if (result == 0 || errno != ENOSYS)
  44 # endif
  45         return result;
  46
  47 # if __ASSUME_STATFS64 == 0
  48       __no_statfs64 = 1;
  49 # endif
  50     }
  51 #endif
  52
  53 #if __ASSUME_STATFS64 == 0
  54   struct statfs buf32;
  55
  56   if (__fstatfs (fd, &buf32) < 0)
  57     return -1;
  58
  59   buf->f_type = buf32.f_type;
  60   buf->f_bsize = buf32.f_bsize;
  61   buf->f_blocks = buf32.f_blocks;
  62   buf->f_bfree = buf32.f_bfree;
  63   buf->f_bavail = buf32.f_bavail;
  64   buf->f_files = buf32.f_files;
  65   buf->f_ffree = buf32.f_ffree;
  66   buf->f_fsid = buf32.f_fsid;
  67   buf->f_namelen = buf32.f_namelen;
  68   buf->f_frsize = buf32.f_frsize;
  69   memcpy (buf->f_spare, buf32.f_spare, sizeof (buf32.f_spare));
  70
  71   return 0;
  72 #endif
  73 }
  74 weak_alias (__fstatfs64, fstatfs64)