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i bet a lot of people didn't know what ssh 1.2.16 had a nice license.
well, except for the patent issues.  someone in sweden (forget their
name at the moment) cleaned out most of the patented code, and now
this code removes rsa code.  when this is done, it will link against
libssl, but the work isn't completely done yet.  then we need to bring
this up to modern days, featurewise.

/*

fdlim.h

Author: David Mazieres <dm@lcs.mit.edu>
	Contributed to be part of ssh.

Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
                   All rights reserved

Created: Tue Aug 22 17:21:32 1995 ylo

*/

/* RCSID("$Id: fdlim.h,v 1.1 1999/09/26 20:53:36 deraadt Exp $"); */

#ifndef FDLIM_H
#define FDLIM_H

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 10000;
  else
    return hard ? rlfd.rlim_max : rlfd.rlim_cur;
#else /* RLIM_INFINITY */
  return hard ? rlfd.rlim_max : rlfd.rlim_cur;
#endif /* RLIM_INFINITY */
#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) {
#ifdef RLIMIT_NOFILE
  struct rlimit rlfd;
  if (lim <= 0)
    return (-1);
  if (getrlimit (RLIMIT_NOFILE, &rlfd) < 0)
    return (-1);
  rlfd.rlim_cur = lim;
  if (setrlimit (RLIMIT_NOFILE, &rlfd) < 0)
    return (-1);
  return (0);
#else /* !RLIMIT_NOFILE */
  return (-1);
#endif /* !RLIMIT_NOFILE */
}

#endif /* FDLIM_H */