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/*
* SCCS: @(#)dtsize.c 1.10 (97/07/21)
*
* UniSoft Ltd., London, England
*
* (C) Copyright 1992 X/Open Company Limited
*
* All rights reserved. No part of this source code may be reproduced,
* stored in a retrieval system, or transmitted, in any form or by any
* means, electronic, mechanical, photocopying, recording or otherwise,
* except as stated in the end-user licence agreement, without the prior
* permission of the copyright owners.
*
* X/Open and the 'X' symbol are trademarks of X/Open Company Limited in
* the UK and other countries.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/************************************************************************
SCCS: @(#)dtsize.c 1.10 97/07/21 TETware release 3.3
NAME: dtsize.c
PRODUCT: TETware
AUTHOR: Andrew Dingwall, UniSoft Ltd.
DATE CREATED: April 1992
DESCRIPTION:
function to determine size of descriptor table
note that on WIN32, socket descriptors are HANDLES rather than
file descriptors and so do not appear in the descriptor table
MODIFICATIONS:
Denis McConalogue, UniSoft Limited, September 1993
use sysconf() rather than _NFILE
Andrew Dingwall, UniSoft Ltd., July 1997
added support the MT DLL version of the C runtime support library
on Win32 systems
Aaron Plattner, April 2010
Fixed warnings when compiled with GCC's -Wall option.
************************************************************************/
#if defined(SVR2) || defined(BSD42) || defined(BSD43)
# define HAS_GETDTABLESIZE
#endif
#include <stdio.h>
#if !defined(_WIN32) && !defined(HAS_GETDTABLESIZE)
# include <unistd.h>
# include <errno.h>
#endif /* !_WIN32 && !HAS_GETDTABLESIZE */
#include "dtmac.h"
#if !defined(_WIN32) && !defined(HAS_GETDTABLESIZE)
# include "error.h"
# define OPENMAX 256
#endif /* !_WIN32 && !HAS_GETDTABLESIZE */
#include "dtetlib.h"
/*
** tet_getdtablesize() - return size of file descriptor table
*/
int tet_getdtablesize()
{
register int rc;
# ifdef HAS_GETDTABLESIZE
rc = getdtablesize();
# else /* do it the posix way */
errno = 0;
if ((rc = (int) sysconf(_SC_OPEN_MAX)) < 0) {
if (errno)
error(errno, "sysconf(_SC_OPEN_MAX) failed",
(char *) 0);
# ifdef _NFILE
rc = _NFILE;
# else
rc = OPENMAX;
# endif /* _NFILE */
}
# endif /* HAS_GETDTABLESIZE */
return(rc);
}
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