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184 lines
5.1 KiB
184 lines
5.1 KiB
/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/*
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* POSIX Standard: 2.9.2 Minimum Values Added to <limits.h>
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*
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* Never include this file directly; use <limits.h> instead.
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*/
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#ifndef _BITS_POSIX1_LIM_H
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#define _BITS_POSIX1_LIM_H 1
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#include <bits/wordsize.h>
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/* These are the standard-mandated minimum values. */
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/* Minimum number of operations in one list I/O call. */
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#define _POSIX_AIO_LISTIO_MAX 2
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/* Minimal number of outstanding asynchronous I/O operations. */
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#define _POSIX_AIO_MAX 1
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/* Maximum length of arguments to `execve', including environment. */
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#define _POSIX_ARG_MAX 4096
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/* Maximum simultaneous processes per real user ID. */
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#ifdef __USE_XOPEN2K
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# define _POSIX_CHILD_MAX 25
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#else
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# define _POSIX_CHILD_MAX 6
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#endif
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/* Minimal number of timer expiration overruns. */
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#define _POSIX_DELAYTIMER_MAX 32
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/* Maximum length of a host name (not including the terminating null)
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as returned from the GETHOSTNAME function. */
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#define _POSIX_HOST_NAME_MAX 255
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/* Maximum link count of a file. */
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#define _POSIX_LINK_MAX 8
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/* Maximum length of login name. */
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#define _POSIX_LOGIN_NAME_MAX 9
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/* Number of bytes in a terminal canonical input queue. */
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#define _POSIX_MAX_CANON 255
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/* Number of bytes for which space will be
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available in a terminal input queue. */
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#define _POSIX_MAX_INPUT 255
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/* Maximum number of message queues open for a process. */
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#define _POSIX_MQ_OPEN_MAX 8
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/* Maximum number of supported message priorities. */
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#define _POSIX_MQ_PRIO_MAX 32
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/* Number of bytes in a filename. */
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#define _POSIX_NAME_MAX 14
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/* Number of simultaneous supplementary group IDs per process. */
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#ifdef __USE_XOPEN2K
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# define _POSIX_NGROUPS_MAX 8
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#else
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# define _POSIX_NGROUPS_MAX 0
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#endif
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/* Number of files one process can have open at once. */
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#ifdef __USE_XOPEN2K
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# define _POSIX_OPEN_MAX 20
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#else
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# define _POSIX_OPEN_MAX 16
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#endif
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#if !defined __USE_XOPEN2K || defined __USE_GNU
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/* Number of descriptors that a process may examine with `pselect' or
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`select'. */
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# define _POSIX_FD_SETSIZE _POSIX_OPEN_MAX
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#endif
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/* Number of bytes in a pathname. */
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#define _POSIX_PATH_MAX 256
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/* Number of bytes than can be written atomically to a pipe. */
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#define _POSIX_PIPE_BUF 512
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/* The number of repeated occurrences of a BRE permitted by the
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REGEXEC and REGCOMP functions when using the interval notation. */
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#define _POSIX_RE_DUP_MAX 255
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/* Minimal number of realtime signals reserved for the application. */
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#define _POSIX_RTSIG_MAX 8
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/* Number of semaphores a process can have. */
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#define _POSIX_SEM_NSEMS_MAX 256
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/* Maximal value of a semaphore. */
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#define _POSIX_SEM_VALUE_MAX 32767
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/* Number of pending realtime signals. */
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#define _POSIX_SIGQUEUE_MAX 32
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/* Largest value of a `ssize_t'. */
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#define _POSIX_SSIZE_MAX 32767
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/* Number of streams a process can have open at once. */
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#define _POSIX_STREAM_MAX 8
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/* The number of bytes in a symbolic link. */
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#define _POSIX_SYMLINK_MAX 255
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/* The number of symbolic links that can be traversed in the
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resolution of a pathname in the absence of a loop. */
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#define _POSIX_SYMLOOP_MAX 8
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/* Number of timer for a process. */
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#define _POSIX_TIMER_MAX 32
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/* Maximum number of characters in a tty name. */
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#define _POSIX_TTY_NAME_MAX 9
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/* Maximum length of a timezone name (element of `tzname'). */
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#ifdef __USE_XOPEN2K
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# define _POSIX_TZNAME_MAX 6
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#else
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# define _POSIX_TZNAME_MAX 3
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#endif
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#if !defined __USE_XOPEN2K || defined __USE_GNU
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/* Maximum number of connections that can be queued on a socket. */
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# define _POSIX_QLIMIT 1
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/* Maximum number of bytes that can be buffered on a socket for send
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or receive. */
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# define _POSIX_HIWAT _POSIX_PIPE_BUF
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/* Maximum number of elements in an `iovec' array. */
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# define _POSIX_UIO_MAXIOV 16
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#endif
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/* Maximum clock resolution in nanoseconds. */
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#define _POSIX_CLOCKRES_MIN 20000000
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/* Get the implementation-specific values for the above. */
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#include <bits/local_lim.h>
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#ifndef SSIZE_MAX
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/* ssize_t is not formally required to be the signed type
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corresponding to size_t, but it is for all configurations supported
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by glibc. */
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# if __WORDSIZE == 64 || __WORDSIZE32_SIZE_ULONG
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# define SSIZE_MAX LONG_MAX
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# else
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# define SSIZE_MAX INT_MAX
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# endif
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#endif
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/* This value is a guaranteed minimum maximum.
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The current maximum can be got from `sysconf'. */
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#ifndef NGROUPS_MAX
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# define NGROUPS_MAX 8
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#endif
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#endif /* bits/posix1_lim.h */
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