sysconf.c revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
/* sysconf(3C) - returns system configuration information */
#include "lint.h"
#include <mtlib.h>
#include <unistd.h>
#include <sys/sysconfig.h>
#include <limits.h>
#include <time.h>
#include <errno.h>
#include <nss_dbdefs.h>
#include <thread.h>
#include <xti.h>
#include "libc.h"
#include "xpg6.h"
/* from nss_common.c */
extern size_t _nss_get_bufsizes(int);
long
{
static int _pagesize = 0;
static int _hz = 0;
static int _stackprot = 0;
extern int __xpg4;
switch (name) {
default:
return (-1L);
case _SC_ARG_MAX:
return ((long)ARG_MAX);
case _SC_CLK_TCK:
if (_hz <= 0)
return (_hz);
case _SC_JOB_CONTROL:
return ((long)_POSIX_JOB_CONTROL);
case _SC_SAVED_IDS:
return ((long)_POSIX_SAVED_IDS);
case _SC_CHILD_MAX:
return (_sysconfig(_CONFIG_CHILD_MAX));
case _SC_NGROUPS_MAX:
return (_sysconfig(_CONFIG_NGROUPS));
case _SC_OPEN_MAX:
return (_sysconfig(_CONFIG_OPEN_FILES));
case _SC_VERSION:
return (200112L);
else
return (199506L);
case _SC_PAGESIZE:
if (_pagesize <= 0)
return (_pagesize);
case _SC_XOPEN_VERSION:
return (600L);
else if (__xpg4 == 0)
return (_sysconfig(_CONFIG_XOPEN_VER));
else
return (4L);
case _SC_XOPEN_XCU_VERSION:
return (600L);
else
return (4L);
/*
* old value for pre XPG5 conformant systems to match
* getpass() length.
* XPG5 special cased with __sysconf_xpg5()
* new value for default and modern XPG systems.
*/
case _SC_PASS_MAX:
if ((__xpg4 == 1) &&
(!(__xpg6 & _C99SUSv3_XPG6_sysconf_version)))
return ((long)_PASS_MAX_XPG);
else
return ((long)_PASS_MAX);
case _SC_LOGNAME_MAX:
return ((long)LOGNAME_MAX);
case _SC_STREAM_MAX:
return (_sysconfig(_CONFIG_OPEN_FILES));
case _SC_TZNAME_MAX:
return (-1L);
case _SC_NPROCESSORS_CONF:
return (_sysconfig(_CONFIG_NPROC_CONF));
case _SC_NPROCESSORS_ONLN:
return (_sysconfig(_CONFIG_NPROC_ONLN));
case _SC_NPROCESSORS_MAX:
return (_sysconfig(_CONFIG_NPROC_MAX));
case _SC_STACK_PROT:
if (_stackprot == 0)
return (_stackprot);
/* POSIX.4 names */
/*
* Each of the following also have _POSIX_* symbols
* defined in <unistd.h>. Values here should align
* with values in the header. Up until the SUSv3 standard
* we defined these simply as 1. With the introduction
* of the new revision, these were changed to 200112L.
* The standard allows us to change the value, however,
* we have kept both values in case application programs
* are relying on the previous value even though an
* application doing so is technically wrong.
*/
case _SC_ASYNCHRONOUS_IO:
case _SC_FSYNC:
case _SC_MAPPED_FILES:
case _SC_MEMLOCK:
case _SC_MEMLOCK_RANGE:
case _SC_MEMORY_PROTECTION:
case _SC_MESSAGE_PASSING:
case _SC_PRIORITY_SCHEDULING:
case _SC_REALTIME_SIGNALS:
case _SC_SEMAPHORES:
case _SC_SYNCHRONIZED_IO:
case _SC_TIMERS:
if (__xpg6 & _C99SUSv3_mode_ON)
return (200112L);
else
return (1L);
case _SC_PRIORITIZED_IO:
#ifdef _POSIX_PRIORITIZED_IO
return (1L);
#else
return (-1L);
#endif
case _SC_AIO_LISTIO_MAX:
return (_sysconfig(_CONFIG_AIO_LISTIO_MAX));
case _SC_AIO_MAX:
return (_sysconfig(_CONFIG_AIO_MAX));
case _SC_AIO_PRIO_DELTA_MAX:
return (_sysconfig(_CONFIG_AIO_PRIO_DELTA_MAX));
case _SC_DELAYTIMER_MAX:
return (_sysconfig(_CONFIG_DELAYTIMER_MAX));
case _SC_MQ_OPEN_MAX:
return (_sysconfig(_CONFIG_MQ_OPEN_MAX));
case _SC_MQ_PRIO_MAX:
return (_sysconfig(_CONFIG_MQ_PRIO_MAX));
case _SC_RTSIG_MAX:
return (_sysconfig(_CONFIG_RTSIG_MAX));
case _SC_SEM_NSEMS_MAX:
return (_sysconfig(_CONFIG_SEM_NSEMS_MAX));
case _SC_SEM_VALUE_MAX:
return (_sysconfig(_CONFIG_SEM_VALUE_MAX));
case _SC_SIGQUEUE_MAX:
return (_sysconfig(_CONFIG_SIGQUEUE_MAX));
case _SC_SIGRT_MAX:
return (_sysconfig(_CONFIG_SIGRT_MAX));
case _SC_SIGRT_MIN:
return (_sysconfig(_CONFIG_SIGRT_MIN));
case _SC_TIMER_MAX:
return (_sysconfig(_CONFIG_TIMER_MAX));
case _SC_PHYS_PAGES:
return (_sysconfig(_CONFIG_PHYS_PAGES));
case _SC_AVPHYS_PAGES:
return (_sysconfig(_CONFIG_AVPHYS_PAGES));
/* XPG4/POSIX.1-1990/POSIX.2-1992 names */
case _SC_2_C_BIND:
return (200112L);
else
return (1L);
case _SC_2_CHAR_TERM:
return ((long)_POSIX2_CHAR_TERM);
case _SC_2_C_DEV:
return (200112L);
else
return (1L);
case _SC_2_C_VERSION:
return (200112L);
else
return (199209L);
case _SC_2_FORT_DEV:
return (-1L);
case _SC_2_FORT_RUN:
return (200112L);
else
return (1L);
case _SC_2_LOCALEDEF:
return (200112L);
else
return (1L);
case _SC_2_SW_DEV:
return (200112L);
else
return (1L);
case _SC_2_UPE:
return (200112L);
else
return (1L);
case _SC_2_VERSION:
return (200112L);
else
return (199209L);
case _SC_BC_BASE_MAX:
return ((long)BC_BASE_MAX);
case _SC_BC_DIM_MAX:
return ((long)BC_DIM_MAX);
case _SC_BC_SCALE_MAX:
return ((long)BC_SCALE_MAX);
case _SC_BC_STRING_MAX:
return ((long)BC_STRING_MAX);
case _SC_COLL_WEIGHTS_MAX:
return ((long)COLL_WEIGHTS_MAX);
case _SC_EXPR_NEST_MAX:
return ((long)EXPR_NEST_MAX);
case _SC_LINE_MAX:
return ((long)LINE_MAX);
case _SC_RE_DUP_MAX:
return ((long)RE_DUP_MAX);
case _SC_XOPEN_CRYPT:
return (1L);
case _SC_XOPEN_ENH_I18N:
return ((long)_XOPEN_ENH_I18N);
case _SC_XOPEN_SHM:
return ((long)_XOPEN_SHM);
/* XPG4v2 (SUS) names */
case _SC_XOPEN_UNIX:
return (1L);
case _SC_XOPEN_LEGACY:
return (1L);
case _SC_ATEXIT_MAX:
return (-1L);
case _SC_IOV_MAX:
return ((long)IOV_MAX);
case _SC_T_IOV_MAX:
return ((long)T_IOV_MAX);
/* XPG5 (SUSv2) names */
case _SC_XOPEN_REALTIME:
return (1L);
#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING) && \
defined(_POSIX_THREAD_PRIO_INHERIT) && \
defined(_POSIX_THREAD_PRIO_PROTECT)
return (1L);
#else
return (-1L);
#endif
case _SC_XBS5_ILP32_OFF32:
return (1L);
case _SC_XBS5_ILP32_OFFBIG:
return (1L);
case _SC_XBS5_LP64_OFF64:
return (1L);
case _SC_XBS5_LPBIG_OFFBIG:
return (1L);
/* POSIX.1c names */
return (-1L);
case _SC_GETGR_R_SIZE_MAX:
return ((long)_nss_get_bufsizes(_SC_GETGR_R_SIZE_MAX));
case _SC_GETPW_R_SIZE_MAX:
return ((long)NSS_BUFLEN_PASSWD);
case _SC_LOGIN_NAME_MAX:
return ((long)(LOGNAME_MAX + 1));
case _SC_THREAD_KEYS_MAX:
return (-1L);
case _SC_THREAD_STACK_MIN:
return ((long)thr_min_stack());
case _SC_THREAD_THREADS_MAX:
return (-1L);
case _SC_TTY_NAME_MAX:
return ((long)TTYNAME_MAX);
case _SC_BARRIERS:
return ((long)_POSIX_BARRIERS);
case _SC_CLOCK_SELECTION:
return ((long)_POSIX_CLOCK_SELECTION);
case _SC_MONOTONIC_CLOCK:
return ((long)_POSIX_MONOTONIC_CLOCK);
case _SC_SPAWN:
return ((long)_POSIX_SPAWN);
case _SC_SPIN_LOCKS:
return ((long)_POSIX_SPIN_LOCKS);
case _SC_THREADS:
case _SC_THREAD_PRIO_INHERIT:
case _SC_THREAD_PRIO_PROTECT:
if (__xpg6 & _C99SUSv3_mode_ON)
return (200112L);
else
return (1L);
case _SC_TIMEOUTS:
return ((long)_POSIX_TIMEOUTS);
/* 1216676 - cache info */
case _SC_COHER_BLKSZ:
return (_sysconfig(_CONFIG_COHERENCY));
case _SC_SPLIT_CACHE:
return (_sysconfig(_CONFIG_SPLIT_CACHE));
case _SC_ICACHE_SZ:
return (_sysconfig(_CONFIG_ICACHESZ));
case _SC_DCACHE_SZ:
return (_sysconfig(_CONFIG_DCACHESZ));
case _SC_ICACHE_LINESZ:
return (_sysconfig(_CONFIG_ICACHELINESZ));
case _SC_DCACHE_LINESZ:
return (_sysconfig(_CONFIG_DCACHELINESZ));
case _SC_ICACHE_BLKSZ:
return (_sysconfig(_CONFIG_ICACHEBLKSZ));
case _SC_DCACHE_BLKSZ:
return (_sysconfig(_CONFIG_DCACHEBLKSZ));
case _SC_DCACHE_TBLKSZ:
return (_sysconfig(_CONFIG_DCACHETBLKSZ));
case _SC_ICACHE_ASSOC:
return (_sysconfig(_CONFIG_ICACHE_ASSOC));
case _SC_DCACHE_ASSOC:
return (_sysconfig(_CONFIG_DCACHE_ASSOC));
case _SC_MAXPID:
if (_maxpid <= 0)
return (_maxpid);
case _SC_CPUID_MAX:
return (_sysconfig(_CONFIG_CPUID_MAX));
case _SC_EPHID_MAX:
return (_sysconfig(_CONFIG_EPHID_MAX));
/* UNIX 03 names - XPG6/SUSv3/POSIX.1-2001 */
case _SC_REGEXP:
return ((long)_POSIX_REGEXP);
case _SC_SHELL:
return ((long)_POSIX_SHELL);
case _SC_HOST_NAME_MAX:
return ((long)_POSIX_HOST_NAME_MAX);
case _SC_READER_WRITER_LOCKS:
return ((long)_POSIX_READER_WRITER_LOCKS);
case _SC_IPV6:
return ((long)_POSIX_IPV6);
case _SC_RAW_SOCKETS:
return ((long)_POSIX_RAW_SOCKETS);
case _SC_XOPEN_STREAMS:
return ((long)_XOPEN_STREAMS);
case _SC_SYMLOOP_MAX:
return (_sysconfig(_CONFIG_SYMLOOP_MAX));
case _SC_V6_ILP32_OFF32:
return (1L);
case _SC_V6_ILP32_OFFBIG:
return (1L);
case _SC_V6_LP64_OFF64:
return (1L);
case _SC_V6_LPBIG_OFFBIG:
return (1L);
/* Unsupported UNIX 03 options */
case _SC_2_PBS:
case _SC_2_PBS_ACCOUNTING:
case _SC_2_PBS_CHECKPOINT:
case _SC_2_PBS_LOCATE:
case _SC_2_PBS_MESSAGE:
case _SC_2_PBS_TRACK:
case _SC_ADVISORY_INFO:
case _SC_CPUTIME:
case _SC_SPORADIC_SERVER:
case _SC_SS_REPL_MAX:
case _SC_THREAD_CPUTIME:
case _SC_TRACE:
case _SC_TRACE_EVENT_FILTER:
case _SC_TRACE_EVENT_NAME_MAX:
case _SC_TRACE_INHERIT:
case _SC_TRACE_LOG:
case _SC_TRACE_NAME_MAX:
case _SC_TRACE_SYS_MAX:
case _SC_TRACE_USER_EVENT_MAX:
case _SC_TYPED_MEMORY_OBJECTS:
return (-1L);
}
}
/*
* UNIX 98 version of sysconf needed in order to set _XOPEN_VERSION to 500.
*/
long
__sysconf_xpg5(int name)
{
switch (name) {
default:
case _SC_XOPEN_VERSION:
return (500L);
case _SC_PASS_MAX:
return ((long)_PASS_MAX_XPG);
}
}