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dup3d.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*           Copyright (c) 1989-2007 AT&T Knowledge Ventures            *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                      by AT&T Knowledge Ventures                      *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Eduardo Krell <ekrell@adexus.cl>                   *
*                                                                      *
***********************************************************************/
#pragma prototyped

#include "3d.h"

#if FS

int
fs3d_dup(int ofd, int nfd)
{
      register Mount_t* mp;

      if (nfd >= 0 && ofd >= 0 && ofd < elementsof(state.file))
      {
            if (state.cache)
            {
                  if (!(state.file[ofd].flags & FILE_OPEN))
                        fileinit(ofd, NiL, NiL, 0);
                  state.file[nfd] = state.file[ofd];
                  state.file[nfd].flags &= ~FILE_CLOEXEC;
                  state.file[nfd].reserved = 0;
                  if (nfd > state.cache)
                        state.cache = nfd;
                  if (nfd > state.open)
                        state.open = nfd;
                  if (mp = state.file[nfd].mount)
                        fscall(mp, MSG_dup, nfd, ofd);
                  for (mp = state.global; mp; mp = mp->global)
                        if (fssys(mp, MSG_dup))
                              fscall(mp, MSG_dup, nfd, ofd);
            }
#if defined(fchdir3d)
            if (state.file[nfd].dir)
            {
                  free(state.file[nfd].dir);
                  state.file[nfd].dir = 0;
            }
            if (state.file[ofd].dir && (state.file[nfd].dir = newof(0, Dir_t, 1, strlen(state.file[ofd].dir->path))))
            {
                  strcpy(state.file[nfd].dir->path, state.file[ofd].dir->path);
                  state.file[nfd].dir->dev = state.file[ofd].dir->dev;
                  state.file[nfd].dir->ino = state.file[ofd].dir->ino;
            }
#endif
      }
      return 0;
}

#endif

#ifdef dup3d

int
dup3d(int fd)
{
      register int      r;

      initialize();
      r = DUP(fd);
#if FS
      if (r >= 0 && r < elementsof(state.file))
            fs3d_dup(fd, r);
#endif
      return r;
}

#else

NoN(dup)

#endif

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