summaryrefslogtreecommitdiff
path: root/posix/posix1_lim.h
blob: a23d224332b04bd0c42343c600caa4c12b8fb821 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
/* 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	6

/* 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		16

/* 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

/* Maximum 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  */