/* $NetBSD: ftw.c,v 1.1 2005/12/30 23:07:32 agc Exp $ */

/*      From OpenBSD: ftw.c,v 1.2 2003/07/21 21:15:32 millert Exp       */

/*
* Copyright (c) 2003 Todd C. Miller <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#include <sys/cdefs.h>

#ifndef lint
__RCSID("$NetBSD: ftw.c,v 1.1 2005/12/30 23:07:32 agc Exp $");
#endif

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fts.h>
#include <ftw.h>
#include <limits.h>

int
ftw(const char *path, int (*fn)(const char *, const struct stat *, int),
   int nfds)
{
       /* LINTED */
       char * const paths[2] = { __UNCONST(path), NULL };
       FTSENT *cur;
       FTS *ftsp;
       int fnflag, error, sverrno;

       /* XXX - nfds is currently unused */
       if (nfds < 1 || nfds > OPEN_MAX) {
               errno = EINVAL;
               return (-1);
       }

       ftsp = fts_open(paths, FTS_COMFOLLOW | FTS_NOCHDIR, NULL);
       if (ftsp == NULL)
               return (-1);
       error = 0;
       while ((cur = fts_read(ftsp)) != NULL) {
               switch (cur->fts_info) {
               case FTS_D:
                       fnflag = FTW_D;
                       break;
               case FTS_DNR:
                       fnflag = FTW_DNR;
                       break;
               case FTS_DP:
                       /* we only visit in preorder */
                       continue;
               case FTS_F:
               case FTS_DEFAULT:
                       fnflag = FTW_F;
                       break;
               case FTS_NS:
               case FTS_NSOK:
               case FTS_SLNONE:
                       fnflag = FTW_NS;
                       break;
               case FTS_SL:
                       fnflag = FTW_SL;
                       break;
               case FTS_DC:
                       errno = ELOOP;
                       /* FALLTHROUGH */
               default:
                       error = -1;
                       goto done;
               }
               error = fn(cur->fts_path, cur->fts_statp, fnflag);
               if (error != 0)
                       break;
       }
done:
       sverrno = errno;
       if (fts_close(ftsp) != 0 && error == 0)
               error = -1;
       else
               errno = sverrno;
       return (error);
}