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freebsd-dev/sys/sys/syslimits.h

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/* -> /*- for license, minor formatting changes
2005-01-07 02:29:27 +00:00
/*-
BSD 4.4 Lite Kernel Sources
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* 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.
* 4. 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
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
BSD 4.4 Lite Kernel Sources
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*/
Made them all idempotent. Reviewed by: Submitted by:
1994-08-21 04:42:17 +00:00
#ifndef _SYS_SYSLIMITS_H_
#define _SYS_SYSLIMITS_H_
Update limits and configuration parameters for 1003.1/TC1/D6. Implement new sysconf keys. Change the implenentation of _SC_ASYNCHRONOUS_IO in preparation for the next set of changes. Move some limits which had been in <sys/syslimits.h> to <limits.h> where they belong. They had only ever been in syslimits.h to provide for the kernel implementation of the CTL_USER MIB branch, which went away with newsysctl years ago. (There is a #error in <sys/syslimits.h> which I will downgrade in the next commit.)
2002-10-27 18:03:02 +00:00
#if !defined(_KERNEL) && !defined(_LIMITS_H_) && !defined(_SYS_PARAM_H_)
netchild's mega-patch to isolate compiler dependencies into a central place. This moves the dependency on GCC's and other compiler's features into the central sys/cdefs.h file, while the individual source files can then refer to #ifdef __COMPILER_FEATURE_FOO where they by now used to refer to #if __GNUC__ > 3.1415 && __BARC__ <= 42. By now, GCC and ICC (the Intel compiler) have been actively tested on IA32 platforms by netchild. Extension to other compilers is supposed to be possible, of course. Submitted by: netchild Reviewed by: various developers on arch@, some time ago
2005-03-02 21:33:29 +00:00
#ifndef _SYS_CDEFS_H_
#error this file needs sys/cdefs.h as a prerequisite
#endif
#ifdef __CC_SUPPORTS_WARNING
As promised, downgrade the #error into a #warning.
2002-10-27 18:03:53 +00:00
#warning "No user-serviceable parts inside."
Update limits and configuration parameters for 1003.1/TC1/D6. Implement new sysconf keys. Change the implenentation of _SC_ASYNCHRONOUS_IO in preparation for the next set of changes. Move some limits which had been in <sys/syslimits.h> to <limits.h> where they belong. They had only ever been in syslimits.h to provide for the kernel implementation of the CTL_USER MIB branch, which went away with newsysctl years ago. (There is a #error in <sys/syslimits.h> which I will downgrade in the next commit.)
2002-10-27 18:03:02 +00:00
#endif
Conditionalize a GCCism. Approved by: re
2002-11-29 23:49:27 +00:00
#endif
Update limits and configuration parameters for 1003.1/TC1/D6. Implement new sysconf keys. Change the implenentation of _SC_ASYNCHRONOUS_IO in preparation for the next set of changes. Move some limits which had been in <sys/syslimits.h> to <limits.h> where they belong. They had only ever been in syslimits.h to provide for the kernel implementation of the CTL_USER MIB branch, which went away with newsysctl years ago. (There is a #error in <sys/syslimits.h> which I will downgrade in the next commit.)
2002-10-27 18:03:02 +00:00
/*
* Do not add any new variables here. (See the comment at the end of
* the file for why.)
*/
For non-embedded platforms, increase the size of the argument list. Note that this results in more kernel virtual memory being reserved for temporary storage of the args. The args temporary space is allocated out of exec_map (a submap of kernel_map). This will use roughly 4MB of KVM. OK'ed by: dg
2005-02-18 08:01:59 +00:00
#define ARG_MAX 262144 /* max bytes for an exec function */
Make CHILD_MAX and OPEN_MAX a tunable parameter.
1994-12-03 17:36:37 +00:00
#ifndef CHILD_MAX
BSD 4.4 Lite Kernel Sources
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#define CHILD_MAX 40 /* max simultaneous processes */
Make CHILD_MAX and OPEN_MAX a tunable parameter.
1994-12-03 17:36:37 +00:00
#endif
BSD 4.4 Lite Kernel Sources
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#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 */
Rework the credential code to support larger values of NGROUPS and NGROUPS_MAX, eliminate ABI dependencies on them, and raise the to 1024 and 1023 respectively. (Previously they were equal, but under a close reading of POSIX, NGROUPS_MAX was defined to be too large by 1 since it is the number of supplemental groups, not total number of groups.) The bulk of the change consists of converting the struct ucred member cr_groups from a static array to a pointer. Do the equivalent in kinfo_proc. Introduce new interfaces crcopysafe() and crsetgroups() for duplicating a process credential before modifying it and for setting group lists respectively. Both interfaces take care for the details of allocating groups array. crsetgroups() takes care of truncating the group list to the current maximum (NGROUPS) if necessary. In the future, crsetgroups() may be responsible for insuring invariants such as sorting the supplemental groups to allow groupmember() to be implemented as a binary search. Because we can not change struct xucred without breaking application ABIs, we leave it alone and introduce a new XU_NGROUPS value which is always 16 and is to be used or NGRPS as appropriate for things such as NFS which need to use no more than 16 groups. When feasible, truncate the group list rather than generating an error. Minor changes: - Reduce the number of hand rolled versions of groupmember(). - Do not assign to both cr_gid and cr_groups[0]. - Modify ipfw to cache ucreds instead of part of their contents since they are immutable once referenced by more than one entity. Submitted by: Isilon Systems (initial implementation) X-MFC after: never PR: bin/113398 kern/133867
2009-06-19 17:10:35 +00:00
#ifndef NGROUPS_MAX
#define NGROUPS_MAX 1023 /* max supplemental group id's */
#endif
Make CHILD_MAX and OPEN_MAX a tunable parameter.
1994-12-03 17:36:37 +00:00
#ifndef OPEN_MAX
BSD 4.4 Lite Kernel Sources
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#define OPEN_MAX 64 /* max open files per process */
Make CHILD_MAX and OPEN_MAX a tunable parameter.
1994-12-03 17:36:37 +00:00
#endif
BSD 4.4 Lite Kernel Sources
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#define PATH_MAX 1024 /* max bytes in pathname */
#define PIPE_BUF 512 /* max bytes for atomic pipe writes */
After one too many PRs on the subject, bite the bullet and define IOV_MAX and its associated constants. Implement _SC_IOV_MAX in the usual way. Be a bit sloppy about the namespace question; this should get cleared up in time for 5.0. MFC after: 1 month
2001-06-18 20:24:54 +00:00
#define IOV_MAX 1024 /* max elements in i/o vector */
BSD 4.4 Lite Kernel Sources
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Claim to be 1003.1-2001. We're not quite, yet, but that's a more useful target than any pre-C99 POSIX (which we could never have conformed to under our ia32 ABI). Document why HOST_NAME_MAX (and hopefully other similar constants in the future) is not defined. Define in <sys/unistd.h> all 1003.1-2001 option and option group constants which did not meet the standard for inclusion in <unistd.h>. Delete from <sys/unistd.h> all sysconf(3) constants and those option constants which were moved to <unistd.h>. pathconf(3) keys remain here as pathconf() is implemented directly as a system call. Add a comment noting brokenness in some .1e additions here. Fix whitespace in definition of constants for rfork(). (5 of 5)
2002-09-21 02:19:03 +00:00
/*
* We leave the following values undefined to force applications to either
* assume conservative values or call sysconf() to get the current value.
*
* HOST_NAME_MAX
Update limits and configuration parameters for 1003.1/TC1/D6. Implement new sysconf keys. Change the implenentation of _SC_ASYNCHRONOUS_IO in preparation for the next set of changes. Move some limits which had been in <sys/syslimits.h> to <limits.h> where they belong. They had only ever been in syslimits.h to provide for the kernel implementation of the CTL_USER MIB branch, which went away with newsysctl years ago. (There is a #error in <sys/syslimits.h> which I will downgrade in the next commit.)
2002-10-27 18:03:02 +00:00
*
* (We should do this for most of the values currently defined here,
* but many programs are not prepared to deal with this yet.)
Claim to be 1003.1-2001. We're not quite, yet, but that's a more useful target than any pre-C99 POSIX (which we could never have conformed to under our ia32 ABI). Document why HOST_NAME_MAX (and hopefully other similar constants in the future) is not defined. Define in <sys/unistd.h> all 1003.1-2001 option and option group constants which did not meet the standard for inclusion in <unistd.h>. Delete from <sys/unistd.h> all sysconf(3) constants and those option constants which were moved to <unistd.h>. pathconf(3) keys remain here as pathconf() is implemented directly as a system call. Add a comment noting brokenness in some .1e additions here. Fix whitespace in definition of constants for rfork(). (5 of 5)
2002-09-21 02:19:03 +00:00
*/
Made them all idempotent. Reviewed by: Submitted by:
1994-08-21 04:42:17 +00:00
#endif
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