sysdeps/unix/sysv/linux/sysctl.c

   1 /* Read or write system information.  Linux version.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2000 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <sys/sysctl.h>
  22
  23 #include <sysdep.h>
  24 #include <sys/syscall.h>
  25 #include <bp-checks.h>
  26
  27 extern int __syscall__sysctl (struct __sysctl_args *__unbounded args);
  28
  29 int
  30 __sysctl (int *name, int nlen, void *oldval, size_t *oldlenp,
  31           void *newval, size_t newlen)
  32 {
  33   /* GKM FIXME: force __sysctl_args decl to have unbounded pointers.  */
  34   struct __sysctl_args args =
  35   {
  36     name: name,
  37     nlen: nlen,
  38     oldval: oldval,
  39     oldlenp: oldlenp,
  40     newval: newval,
  41     newlen: newlen
  42   };
  43   (void) CHECK_N (name, nlen);
  44   (void) CHECK_N (oldval, *oldlenp);
  45   (void) CHECK_N (newval, newlen);
  46
  47   return INLINE_SYSCALL (_sysctl, 1, __ptrvalue (&args));
  48 }
  49 weak_alias (__sysctl, sysctl)