[thirdparty/glibc.git] / posix / posix1_lim.h

/* Copyright (C) 1991, 1992, 1993, 1996 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/*
 *	POSIX Standard: 2.9.2 Minimum Values	Added to <limits.h>
 */

#ifndef	_POSIX1_LIMITS_H

#define	_POSIX1_LIMITS_H	1


/* These are the standard-mandated minimum values.  */

/* Maximum length of arguments to `execve', including environment.  */
#define	_POSIX_ARG_MAX		4096

/* Maximum simultaneous processes per real user ID.  */
#define	_POSIX_CHILD_MAX	25

/* Maximum link count of a file.  */
#define	_POSIX_LINK_MAX		8

/* Number of bytes in a terminal canonical input queue.  */
#define	_POSIX_MAX_CANON	255

/* Number of bytes for which space will be
   available in a terminal input queue.  */
#define	_POSIX_MAX_INPUT	255

/* Number of simultaneous supplementary group IDs per process.  */
#define	_POSIX_NGROUPS_MAX	0

/* Number of files one process can have open at once.  */
#define	_POSIX_OPEN_MAX		20

/* Number of descriptors that a process may examine with `pselect' or
   `select'.  */
#define	_POSIX_FD_SETSIZE	_POSIX_OPEN_MAX

/* Number of bytes in a filename.  */
#define	_POSIX_NAME_MAX		14

/* Number of bytes in a pathname.  */
#define	_POSIX_PATH_MAX		255

/* Number of bytes than can be written atomically to a pipe.  */
#define	_POSIX_PIPE_BUF		512

/* Largest value of a `ssize_t'.  */
#define	_POSIX_SSIZE_MAX	32767

/* Number of streams a process can have open at once.  */
#define	_POSIX_STREAM_MAX	8

/* Maximum length of a timezone name (element of `tzname').  */
#define	_POSIX_TZNAME_MAX	3

/* Maximum number of connections that can be queued on a socket.  */
#define	_POSIX_QLIMIT		1

/* Maximem number of bytes that can be buffered on a socket for send
   or receive.  */
#define	_POSIX_HIWAT		_POSIX_PIPE_BUF

/* Maximum number of elements in an `iovec' array.  */
#define	_POSIX_UIO_MAXIOV	16

/* Maximum number of characters in a tty name.  */
#define	_POSIX_TTY_NAME_MAX	9

/* Maximum length of login name.  */
#define	_POSIX_LOGIN_NAME_MAX	9


/* Get the implementation-specific values for the above.  */
#include <local_lim.h>


#ifndef	SSIZE_MAX
#define	SSIZE_MAX	INT_MAX
#endif


/* This value is a guaranteed minimum maximum.
   The current maximum can be got from `sysconf'.  */

#ifndef	NGROUPS_MAX
#define	NGROUPS_MAX	_POSIX_NGROUPS_MAX
#endif

#endif	/* posix1_limits.h  */
Commit	Line	Data
503054c0	1	/* Copyright (C) 1991, 1992, 1993, 1996 Free Software Foundation, Inc.
2c6fe0bd	2	This file is part of the GNU C Library.
28f540f4	3
2c6fe0bd UD	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Library General Public License as
	6	published by the Free Software Foundation; either version 2 of the
	7	License, or (at your option) any later version.
28f540f4	8
2c6fe0bd UD	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	Library General Public License for more details.
28f540f4	13
2c6fe0bd UD	14	You should have received a copy of the GNU Library General Public
	15	License along with the GNU C Library; see the file COPYING.LIB. If not,
	16	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	17	Boston, MA 02111-1307, USA. */
28f540f4 RM	18
	19	/*
	20	* POSIX Standard: 2.9.2 Minimum Values Added to <limits.h>
	21	*/
	22
	23	#ifndef _POSIX1_LIMITS_H
	24
	25	#define _POSIX1_LIMITS_H 1
	26
	27
	28	/* These are the standard-mandated minimum values. */
	29
	30	/* Maximum length of arguments to `execve', including environment. */
	31	#define _POSIX_ARG_MAX 4096
	32
	33	/* Maximum simultaneous processes per real user ID. */
2c6fe0bd	34	#define _POSIX_CHILD_MAX 25
28f540f4 RM	35
	36	/* Maximum link count of a file. */
	37	#define _POSIX_LINK_MAX 8
	38
	39	/* Number of bytes in a terminal canonical input queue. */
	40	#define _POSIX_MAX_CANON 255
	41
	42	/* Number of bytes for which space will be
	43	available in a terminal input queue. */
	44	#define _POSIX_MAX_INPUT 255
	45
	46	/* Number of simultaneous supplementary group IDs per process. */
	47	#define _POSIX_NGROUPS_MAX 0
	48
	49	/* Number of files one process can have open at once. */
2c6fe0bd	50	#define _POSIX_OPEN_MAX 20
28f540f4	51
503054c0 RM	52	/* Number of descriptors that a process may examine with `pselect' or
	53	`select'. */
	54	#define _POSIX_FD_SETSIZE _POSIX_OPEN_MAX
	55
28f540f4 RM	56	/* Number of bytes in a filename. */
	57	#define _POSIX_NAME_MAX 14
	58
	59	/* Number of bytes in a pathname. */
	60	#define _POSIX_PATH_MAX 255
	61
	62	/* Number of bytes than can be written atomically to a pipe. */
	63	#define _POSIX_PIPE_BUF 512
	64
	65	/* Largest value of a `ssize_t'. */
	66	#define _POSIX_SSIZE_MAX 32767
	67
	68	/* Number of streams a process can have open at once. */
	69	#define _POSIX_STREAM_MAX 8
	70
	71	/* Maximum length of a timezone name (element of `tzname'). */
	72	#define _POSIX_TZNAME_MAX 3
	73
503054c0 RM	74	/* Maximum number of connections that can be queued on a socket. */
	75	#define _POSIX_QLIMIT 1
	76
	77	/* Maximem number of bytes that can be buffered on a socket for send
	78	or receive. */
	79	#define _POSIX_HIWAT _POSIX_PIPE_BUF
	80
	81	/* Maximum number of elements in an `iovec' array. */
	82	#define _POSIX_UIO_MAXIOV 16
	83
23396375 UD	84	/* Maximum number of characters in a tty name. */
	85	#define _POSIX_TTY_NAME_MAX 9
	86
	87	/* Maximum length of login name. */
	88	#define _POSIX_LOGIN_NAME_MAX 9
	89
28f540f4 RM	90
	91	/* Get the implementation-specific values for the above. */
	92	#include <local_lim.h>
	93
	94
	95	#ifndef SSIZE_MAX
	96	#define SSIZE_MAX INT_MAX
	97	#endif
	98
	99
	100	/* This value is a guaranteed minimum maximum.
	101	The current maximum can be got from `sysconf'. */
	102
	103	#ifndef NGROUPS_MAX
	104	#define NGROUPS_MAX _POSIX_NGROUPS_MAX
	105	#endif
	106
	107	#endif /* posix1_limits.h */