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      1 /*	$NetBSD: syslimits.h,v 1.29 2024/12/22 23:18:29 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)syslimits.h	8.1 (Berkeley) 6/2/93
     32  */
     33 
     34 #ifndef _SYS_SYSLIMITS_H_
     35 #define _SYS_SYSLIMITS_H_
     36 
     37 #include <sys/featuretest.h>
     38 
     39 #if defined(_KERNEL_OPT)
     40 #include "opt_syslimits.h"
     41 #endif
     42 
     43 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
     44     defined(_NETBSD_SOURCE)
     45 #define	ARG_MAX		 (256 * 1024)	/* max bytes for an exec function */
     46 #ifndef CHILD_MAX
     47 #define	CHILD_MAX		  160	/* max simultaneous processes */
     48 #endif
     49 #define	GID_MAX		   2147483647U	/* max value for a gid_t (2^31-2) */
     50 #define	LINK_MAX		32767	/* max file link count */
     51 #define	MAX_CANON		  255	/* max bytes in term canon input line */
     52 #define	MAX_INPUT		  255	/* max bytes in terminal input */
     53 #define	NAME_MAX		  511	/* max bytes in a file name, must be */
     54 					/* kept in sync with MAXNAMLEN */
     55 #define	NGROUPS_MAX		   16	/* max supplemental group id's */
     56 #define	UID_MAX		   2147483647U	/* max value for a uid_t (2^31-2) */
     57 #ifndef OPEN_MAX
     58 #define	OPEN_MAX		  128	/* max open files per process */
     59 #endif
     60 #define	PATH_MAX		 1024	/* max bytes in pathname */
     61 #define	PIPE_BUF		  512	/* max bytes for atomic pipe writes */
     62 
     63 #define	BC_BASE_MAX	      INT_MAX	/* max ibase/obase values in bc(1) */
     64 #define	BC_DIM_MAX		65535	/* max array elements in bc(1) */
     65 #define	BC_SCALE_MAX	      INT_MAX	/* max scale value in bc(1) */
     66 #define	BC_STRING_MAX	      INT_MAX	/* max const string length in bc(1) */
     67 #define	COLL_WEIGHTS_MAX	    2	/* max weights for order keyword */
     68 #define	EXPR_NEST_MAX		   32	/* max expressions nested in expr(1) */
     69 #define	LINE_MAX		 2048	/* max bytes in an input line */
     70 #define	RE_DUP_MAX		  255	/* max RE's in interval notation */
     71 
     72 /*
     73  * POSIX Realtime Extension (1003.1b-1993)
     74  */
     75 #if (_POSIX_C_SOURCE - 0) >= 199309L || defined(_NETBSD_SOURCE)
     76 #define	DELAYTIMER_MAX		   32	/* max timer_overrun() value */
     77 #endif
     78 
     79 /*
     80  * IEEE Std 1003.1c-95, adopted in X/Open CAE Specification Issue 5 Version 2
     81  */
     82 #if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \
     83     defined(_NETBSD_SOURCE)
     84 #define	LOGIN_NAME_MAX		   17	/* max login name length incl. NUL */
     85 #endif
     86 
     87 /*
     88  * X/Open CAE Specification Issue 5 Version 2
     89  */
     90 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
     91 #define	IOV_MAX			 1024	/* max # of iovec's for readv(2) etc. */
     92 #define	NZERO			   20	/* default "nice" */
     93 #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
     94 
     95 #endif /* !_ANSI_SOURCE */
     96 
     97 #endif /* !_SYS_SYSLIMITS_H_ */
     98