sysdeps/unix/sysv/linux/statfs64.c

   1 /* Return information about the filesystem on which FILE resides.
   2    Copyright (C) 1996-2015 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 # if __ASSUME_STATFS64 == 0
  41       INTERNAL_SYSCALL_DECL (err);
  42       int result = INTERNAL_SYSCALL (statfs64, err, 3, file,
  43                                      sizeof (*buf), buf);
  44
  45       if (!__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err))
  46           || INTERNAL_SYSCALL_ERRNO (result, err) != ENOSYS)
  47         return result;
  48 # else
  49       return INLINE_SYSCALL_RETURN (statfs64, 3, int, file,
  50                                     sizeof (*buf), buf);
  51 # endif
  52
  53 # if __ASSUME_STATFS64 == 0
  54       __no_statfs64 = 1;
  55 # endif
  56     }
  57 #endif
  58
  59 #if __ASSUME_STATFS64 == 0
  60   struct statfs buf32;
  61
  62   if (__statfs (file, &buf32) < 0)
  63     return -1;
  64
  65   buf->f_type = buf32.f_type;
  66   buf->f_bsize = buf32.f_bsize;
  67   buf->f_blocks = buf32.f_blocks;
  68   buf->f_bfree = buf32.f_bfree;
  69   buf->f_bavail = buf32.f_bavail;
  70   buf->f_files = buf32.f_files;
  71   buf->f_ffree = buf32.f_ffree;
  72   buf->f_fsid = buf32.f_fsid;
  73   buf->f_namelen = buf32.f_namelen;
  74   buf->f_frsize = buf32.f_frsize;
  75   memcpy (buf->f_spare, buf32.f_spare, sizeof (buf32.f_spare));
  76
  77   return 0;
  78 #endif
  79 }
  80 weak_alias (__statfs64, statfs64)