glibc/sysdeps/unix/sysv/linux/x86_64/sysconf.c

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/* Get file-specific information about a file. Linux version.
Copyright (C) 2003-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
static long int linux_sysconf (int name);
extern long int __cache_sysconf (int) attribute_hidden;
/* Get the value of the system variable NAME. */
long int
__sysconf (int name)
{
if (name >= _SC_LEVEL1_ICACHE_SIZE && name <= _SC_LEVEL4_CACHE_LINESIZE)
return __cache_sysconf (name);
return linux_sysconf (name);
}
/* Now the generic Linux version. */
#undef __sysconf
#define __sysconf static linux_sysconf
#include "../sysconf.c"