1 /* Copyright (C) 1991-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <unistd.h>
19 #include <sys/param.h>
20
21 /* Return the system page size. */
22 int
__getpagesize(void)23 __getpagesize (void)
24 {
25 #ifdef EXEC_PAGESIZE
26 return EXEC_PAGESIZE;
27 #else /* No EXEC_PAGESIZE. */
28 #ifdef NBPG
29 #ifndef CLSIZE
30 #define CLSIZE 1
31 #endif /* No CLSIZE. */
32 return NBPG * CLSIZE;
33 #else /* No NBPG. */
34 return NBPC;
35 #endif /* NBPG. */
36 #endif /* EXEC_PAGESIZE. */
37 }
38 libc_hidden_def (__getpagesize)
39 weak_alias (__getpagesize, getpagesize)
40