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glibc  2.9
sysctl.c
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00001 /* Read or write system information.  Linux version.
00002    Copyright (C) 1996-2000,2002,2003,2005 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
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 <string.h>  /* For the real memset prototype.  */
00022 #include <sys/sysctl.h>
00023 
00024 #include <sysdep.h>
00025 #include <sys/syscall.h>
00026 #include <bp-checks.h>
00027 
00028 int
00029 __sysctl (int *name, int nlen, void *oldval, size_t *oldlenp,
00030          void *newval, size_t newlen)
00031 {
00032   /* GKM FIXME: force __sysctl_args decl to have unbounded pointers.  */
00033   struct __sysctl_args args =
00034   {
00035     .name = name,
00036     .nlen = nlen,
00037     .oldval = oldval,
00038     .oldlenp = oldlenp,
00039     .newval = newval,
00040     .newlen = newlen
00041   };
00042   (void) CHECK_N (name, nlen);
00043   (void) CHECK_N (oldval, *oldlenp);
00044   (void) CHECK_N (newval, newlen);
00045 
00046   return INLINE_SYSCALL (_sysctl, 1, __ptrvalue (&args));
00047 }
00048 libc_hidden_def (__sysctl)
00049 weak_alias (__sysctl, sysctl)