lib/libc/gen/ftw.c

   1 /* $NetBSD$ */
   2
   3 /*      From OpenBSD: ftw.c,v 1.2 2003/07/21 21:15:32 millert Exp       */
   4
   5 /*
   6  * Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
   7  *
   8  * Permission to use, copy, modify, and distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  *
  20  * Sponsored in part by the Defense Advanced Research Projects
  21  * Agency (DARPA) and Air Force Research Laboratory, Air Force
  22  * Materiel Command, USAF, under agreement number F39502-99-1-0512.
  23  */
  24 #include <sys/cdefs.h>
  25
  26 #ifndef lint
  27 __RCSID("$NetBSD$");
  28 #endif
  29
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <errno.h>
  33 #include <fts.h>
  34 #include <ftw.h>
  35 #include <limits.h>
  36
  37 int
  38 ftw(const char *path, int (*fn)(const char *, const struct stat *, int),
  39     int nfds)
  40 {
  41         /* LINTED */
  42         char * const paths[2] = { __UNCONST(path), NULL };
  43         FTSENT *cur;
  44         FTS *ftsp;
  45         int fnflag, error, sverrno;
  46
  47         /* XXX - nfds is currently unused */
  48         if (nfds < 1 || nfds > OPEN_MAX) {
  49                 errno = EINVAL;
  50                 return (-1);
  51         }
  52
  53         ftsp = fts_open(paths, FTS_COMFOLLOW | FTS_NOCHDIR, NULL);
  54         if (ftsp == NULL)
  55                 return (-1);
  56         error = 0;
  57         while ((cur = fts_read(ftsp)) != NULL) {
  58                 switch (cur->fts_info) {
  59                 case FTS_D:
  60                         fnflag = FTW_D;
  61                         break;
  62                 case FTS_DNR:
  63                         fnflag = FTW_DNR;
  64                         break;
  65                 case FTS_DP:
  66                         /* we only visit in preorder */
  67                         continue;
  68                 case FTS_F:
  69                 case FTS_DEFAULT:
  70                         fnflag = FTW_F;
  71                         break;
  72                 case FTS_NS:
  73                 case FTS_NSOK:
  74                 case FTS_SLNONE:
  75                         fnflag = FTW_NS;
  76                         break;
  77                 case FTS_SL:
  78                         fnflag = FTW_SL;
  79                         break;
  80                 case FTS_DC:
  81                         errno = ELOOP;
  82                         /* FALLTHROUGH */
  83                 default:
  84                         error = -1;
  85                         goto done;
  86                 }
  87                 error = fn(cur->fts_path, cur->fts_statp, fnflag);
  88                 if (error != 0)
  89                         break;
  90         }
  91 done:
  92         sverrno = errno;
  93         if (fts_close(ftsp) != 0 && error == 0)
  94                 error = -1;
  95         else
  96                 errno = sverrno;
  97         return (error);
  98 }