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glibc  2.9
ustat.c
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00001 /* Copyright (C) 1997, 1998, 2000, 2003 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <errno.h>
00021 #include <sys/ustat.h>
00022 #include <sys/sysmacros.h>
00023 
00024 #include <sysdep.h>
00025 #include <sys/syscall.h>
00026 #include <bp-checks.h>
00027 
00028 int
00029 ustat (dev_t dev, struct ustat *ubuf)
00030 {
00031   unsigned long long int k_dev;
00032 
00033   /* We must convert the value to dev_t type used by the kernel.  */
00034   k_dev =  dev & ((1ULL << 32) - 1);
00035   if (k_dev != dev)
00036     {
00037       __set_errno (EINVAL);
00038       return -1;
00039     }
00040 
00041   return INLINE_SYSCALL (ustat, 2, (unsigned int) k_dev, CHECK_1 (ubuf));
00042 }