lib/libc/gen/ftw.c

   1 /*      $OpenBSD: ftw.c,v 1.4 2004/07/07 16:05:23 millert Exp $ */
   2
   3 /*
   4  * Copyright (c) 2003, 2004 Todd C. Miller <Todd.Miller@courtesan.com>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  *
  18  * Sponsored in part by the Defense Advanced Research Projects
  19  * Agency (DARPA) and Air Force Research Laboratory, Air Force
  20  * Materiel Command, USAF, under agreement number F39502-99-1-0512.
  21  *
  22  * $FreeBSD: src/lib/libc/gen/ftw.c,v 1.4 2004/08/24 13:00:55 tjr Exp $
  23  */
  24
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <errno.h>
  28 #include <fts.h>
  29 #include <ftw.h>
  30 #include <limits.h>
  31
  32 int
  33 ftw(const char *path, int (*fn)(const char *, const struct stat *, int),
  34     int nfds)
  35 {
  36         char * const paths[2] = { (char *)path, NULL };
  37         FTSENT *cur;
  38         FTS *ftsp;
  39         int error = 0, fnflag, sverrno;
  40
  41         /* XXX - nfds is currently unused */
  42         if (nfds < 1 || nfds > OPEN_MAX) {
  43                 errno = EINVAL;
  44                 return (-1);
  45         }
  46
  47         ftsp = fts_open(paths, FTS_LOGICAL | FTS_COMFOLLOW | FTS_NOCHDIR, NULL);
  48         if (ftsp == NULL)
  49                 return (-1);
  50         while ((cur = fts_read(ftsp)) != NULL) {
  51                 switch (cur->fts_info) {
  52                 case FTS_D:
  53                         fnflag = FTW_D;
  54                         break;
  55                 case FTS_DNR:
  56                         fnflag = FTW_DNR;
  57                         break;
  58                 case FTS_DP:
  59                         /* we only visit in preorder */
  60                         continue;
  61                 case FTS_F:
  62                 case FTS_DEFAULT:
  63                         fnflag = FTW_F;
  64                         break;
  65                 case FTS_NS:
  66                 case FTS_NSOK:
  67                 case FTS_SLNONE:
  68                         fnflag = FTW_NS;
  69                         break;
  70                 case FTS_SL:
  71                         fnflag = FTW_SL;
  72                         break;
  73                 case FTS_DC:
  74                         errno = ELOOP;
  75                         /* FALLTHROUGH */
  76                 default:
  77                         error = -1;
  78                         goto done;
  79                 }
  80                 error = fn(cur->fts_path, cur->fts_statp, fnflag);
  81                 if (error != 0)
  82                         break;
  83         }
  84 done:
  85         sverrno = errno;
  86         if (fts_close(ftsp) != 0 && error == 0)
  87                 error = -1;
  88         else
  89                 errno = sverrno;
  90         return (error);
  91 }