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+/* $OpenBSD: syslimits.h,v 1.14 2020/04/02 18:00:00 deraadt Exp $ */
+/* $NetBSD: syslimits.h,v 1.12 1995/10/05 05:26:19 thorpej Exp $ */
+
+/*
+ * Copyright (c) 1988, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)syslimits.h 8.1 (Berkeley) 6/2/93
+ */
+
+#include <sys/cdefs.h>
+
+#if __POSIX_VISIBLE || __XPG_VISIBLE || __BSD_VISIBLE
+#define ARG_MAX (512 * 1024) /* max bytes for an exec function */
+#define CHILD_MAX 80 /* max simultaneous processes */
+#define LINK_MAX 32767 /* max file link count */
+#define MAX_CANON 255 /* max bytes in term canon input line */
+#define MAX_INPUT 255 /* max bytes in terminal input */
+#define NAME_MAX 255 /* max bytes in a file name */
+#define NGROUPS_MAX 16 /* max supplemental group id's */
+#define OPEN_MAX 64 /* max open files per process */
+#define PATH_MAX 1024 /* max bytes in pathname */
+#define PIPE_BUF 512 /* max bytes for atomic pipe writes */
+#define SYMLINK_MAX PATH_MAX /* max bytes in a symbolic link */
+#define SYMLOOP_MAX 32 /* max symlinks per path (for loops) */
+
+#define BC_BASE_MAX INT_MAX /* max ibase/obase values in bc(1) */
+#define BC_DIM_MAX 65535 /* max array elements in bc(1) */
+#define BC_SCALE_MAX INT_MAX /* max scale value in bc(1) */
+#define BC_STRING_MAX INT_MAX /* max const string length in bc(1) */
+#define COLL_WEIGHTS_MAX 2 /* max weights for order keyword */
+#define EXPR_NEST_MAX 32 /* max expressions nested in expr(1) */
+#define LINE_MAX 2048 /* max bytes in an input line */
+#ifndef RE_DUP_MAX
+#define RE_DUP_MAX 255 /* max RE's in interval notation */
+#define SEM_VALUE_MAX UINT_MAX /* max value of a sem_* semaphore */
+#endif
+
+#if __XPG_VISIBLE
+#define IOV_MAX 1024 /* max # of iov's (readv,sendmsg,etc) */
+#define NZERO 20 /* default "nice" */
+#endif /* __XPG_VISIBLE */
+
+#endif /* __POSIX_VISIBLE || __XPG_VISIBLE || __BSD_VISIBLE */
+
+#if __XPG_VISIBLE >= 500 || __POSIX_VISIBLE >= 199506 || __BSD_VISIBLE
+#define TTY_NAME_MAX 260 /* max tty device name length w/ NUL */
+#define LOGIN_NAME_MAX 32 /* max login name length w/ NUL */
+#endif /* __XPG_VISIBLE >= 500 || __POSIX_VISIBLE >= 199506 || __BSD_VISIBLE */
+
+#if __POSIX_VISIBLE >= 200112
+#define HOST_NAME_MAX 255 /* max hostname length w/o NUL */
+#endif