sysdeps/unix/sysv/linux/statfs64.c

   1 /* Return information about the filesystem on which FILE 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
  27 # if __ASSUME_STATFS64 == 0
  28 int __no_statfs64 attribute_hidden;
  29 #endif
  30
  31 /* Return information about the filesystem on which FILE resides.  */
  32 int
  33 __statfs64 (const char *file, struct statfs64 *buf)
  34 {
  35 #ifdef __NR_statfs64
  36 # if __ASSUME_STATFS64 == 0
  37   if (! __no_statfs64)
  38 # endif
  39     {
  40       int result = INLINE_SYSCALL (statfs64, 3, file, 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 (__statfs (file, &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 (__statfs64, statfs64)