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80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup POSIXAPI
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*
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* @brief Get Configurable System Variables
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*/
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/*
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* COPYRIGHT (c) 1989-2007.
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* On-Line Applications Research Corporation (OAR).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <time.h>
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#include <unistd.h>
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#include <errno.h>
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#include <rtems.h>
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#include <rtems/seterr.h>
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#include <rtems/libio_.h>
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#include <sys/param.h>
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/*
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* 4.8.1 Get Configurable System Variables, P1003.1b-1993, p. 95
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*/
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long sysconf(
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int name
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)
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{
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switch ( name ) {
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case _SC_CLK_TCK:
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return (long) rtems_clock_get_ticks_per_second();
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case _SC_OPEN_MAX:
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return rtems_libio_number_iops;
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case _SC_GETPW_R_SIZE_MAX:
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return 1024;
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case _SC_PAGESIZE:
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return PAGE_SIZE;
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case _SC_SYMLOOP_MAX:
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return RTEMS_FILESYSTEM_SYMLOOP_MAX;
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case _SC_NPROCESSORS_CONF:
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return (long) rtems_configuration_get_maximum_processors();
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case _SC_NPROCESSORS_ONLN:
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return (long) rtems_scheduler_get_processor_maximum();
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case _SC_POSIX_26_VERSION:
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return (long) _POSIX_26_VERSION;
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default:
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rtems_set_errno_and_return_minus_one( EINVAL );
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}
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}
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