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/* $Id: fdlim.h,v 1.9 2001/10/08 22:40:13 dm Exp $ */
/*
*
* Copyright (C) 1998 David Mazieres (dm@uun.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
#ifndef FDLIM_H
#define FDLIM_H
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#define FDLIM_MAX 0x10000
static int
fdlim_get (int hard)
{
#ifdef RLIMIT_NOFILE
struct rlimit rlfd;
if (getrlimit (RLIMIT_NOFILE, &rlfd) < 0)
return -1;
#ifdef RLIM_INFINITY /* not defined on HPSUX */
if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY)
return FDLIM_MAX;
else
#endif /* RLIM_INFINITY */
return hard ? rlfd.rlim_max : rlfd.rlim_cur;
#else /* !RLIMIT_NOFILE */
#ifdef HAVE_GETDTABLESIZE
return getdtablesize ();
#else /* !HAVE_GETDTABLESIZE */
#ifdef _SC_OPEN_MAX
return (sysconf (_SC_OPEN_MAX));
#else /* !_SC_OPEN_MAX */
#ifdef NOFILE
return (NOFILE);
#else /* !NOFILE */
return 25;
#endif /* !NOFILE */
#endif /* !_SC_OPEN_MAX */
#endif /* !HAVE_GETDTABLESIZE */
#endif /* !RLIMIT_NOFILE */
}
static int
fdlim_set (int lim, int hard)
{
#ifdef RLIMIT_NOFILE
struct rlimit rlfd;
if (lim <= 0)
return -1;
if (getrlimit (RLIMIT_NOFILE, &rlfd) < 0)
return -1;
#ifdef RLIMIT_INFINITY
if (lim == FDLIM_MAX)
rlfd.rlim_cur = RLIM_INFINITY;
else
#endif /* RLIMIT_INFINITY */
rlfd.rlim_cur = lim;
if (rlfd.rlim_cur > rlfd.rlim_max) {
if (hard)
rlfd.rlim_max = rlfd.rlim_cur;
else
rlfd.rlim_cur = rlfd.rlim_max;
}
if (setrlimit (RLIMIT_NOFILE, &rlfd) < 0)
return -1;
return 0;
#else /* !RLIMIT_NOFILE */
return -1;
#endif /* !RLIMIT_NOFILE */
}
#endif /* FDLIM_H */
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