1/* Compatibility header for old-style Unix parameters and limits.
  2   Copyright (C) 1995-2025 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, see
 17   <https://www.gnu.org/licenses/>.  */
 18
 19#ifndef _SYS_PARAM_H
 20#define _SYS_PARAM_H    1
 21
 22#define __need_NULL
 23#include <stddef.h>
 24
 25#include <sys/types.h>
 26#include <limits.h>
 27#include <endian.h>                     /* Define BYTE_ORDER et al.  */
 28#include <signal.h>                     /* Define NSIG.  */
 29
 30/* This file defines some things in system-specific ways.  */
 31#include <bits/param.h>
 32
 33
 34/* BSD names for some <limits.h> values.  */
 35
 36#define NBBY		CHAR_BIT
 37
 38#if !defined NGROUPS && defined NGROUPS_MAX
 39# define NGROUPS	NGROUPS_MAX
 40#endif
 41#if !defined MAXSYMLINKS && defined SYMLOOP_MAX
 42# define MAXSYMLINKS	SYMLOOP_MAX
 43#endif
 44#if !defined CANBSIZ && defined MAX_CANON
 45# define CANBSIZ	MAX_CANON
 46#endif
 47#if !defined MAXPATHLEN && defined PATH_MAX
 48# define MAXPATHLEN	PATH_MAX
 49#endif
 50#if !defined NOFILE && defined OPEN_MAX
 51# define NOFILE		OPEN_MAX
 52#endif
 53#if !defined MAXHOSTNAMELEN && defined HOST_NAME_MAX
 54# define MAXHOSTNAMELEN	HOST_NAME_MAX
 55#endif
 56#ifndef NCARGS
 57# ifdef ARG_MAX
 58#  define NCARGS	ARG_MAX
 59# else
 60/* ARG_MAX is unlimited, but we define NCARGS for BSD programs that want to
 61   compare against some fixed limit.  */
 62# define NCARGS		INT_MAX
 63# endif
 64#endif
 65
 66
 67/* Magical constants.  */
 68#ifndef NOGROUP
 69# define NOGROUP	65535     /* Marker for empty group set member.  */
 70#endif
 71#ifndef NODEV
 72# define NODEV		((dev_t) -1)    /* Non-existent device.  */
 73#endif
 74
 75
 76/* Unit of `st_blocks'.  */
 77#ifndef DEV_BSIZE
 78# define DEV_BSIZE	512
 79#endif
 80
 81
 82/* Bit map related macros.  */
 83#define setbit(a,i)     ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
 84#define clrbit(a,i)     ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
 85#define isset(a,i)      ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
 86#define isclr(a,i)      (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
 87
 88/* Macros for counting and rounding.  */
 89#ifndef howmany
 90# define howmany(x, y)  (((x) + ((y) - 1)) / (y))
 91#endif
 92#ifdef __GNUC__
 93# define roundup(x, y)  (__builtin_constant_p (y) && powerof2 (y)             \
 94                         ? (((x) + (y) - 1) & ~((y) - 1))                     \
 95                         : ((((x) + ((y) - 1)) / (y)) * (y)))
 96#else
 97# define roundup(x, y)  ((((x) + ((y) - 1)) / (y)) * (y))
 98#endif
 99#define powerof2(x)     ((((x) - 1) & (x)) == 0)
100
101/* Macros for min/max.  */
102#define MIN(a,b) (((a)<(b))?(a):(b))
103#define MAX(a,b) (((a)>(b))?(a):(b))
104
105
106#endif  /* sys/param.h */