lib/libc/gen/nftw.c

   1 /*      $OpenBSD: nftw.c,v 1.7 2006/03/31 19:41:44 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: head/lib/libc/gen/nftw.c 239160 2012-08-09 22:05:40Z jilles $
  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
  31 int
  32 nftw(const char *path, int (*fn)(const char *, const struct stat *, int,
  33      struct FTW *), int nfds, int ftwflags)
  34 {
  35         char * const paths[2] = { (char *)path, NULL };
  36         struct FTW ftw;
  37         FTSENT *cur;
  38         FTS *ftsp;
  39         int error = 0, ftsflags, fnflag, postorder, sverrno;
  40
  41         /* XXX - nfds is currently unused */
  42         if (nfds < 1) {
  43                 errno = EINVAL;
  44                 return (-1);
  45         }
  46
  47         ftsflags = FTS_COMFOLLOW;
  48         if (!(ftwflags & FTW_CHDIR))
  49                 ftsflags |= FTS_NOCHDIR;
  50         if (ftwflags & FTW_MOUNT)
  51                 ftsflags |= FTS_XDEV;
  52         if (ftwflags & FTW_PHYS)
  53                 ftsflags |= FTS_PHYSICAL;
  54         else
  55                 ftsflags |= FTS_LOGICAL;
  56         postorder = (ftwflags & FTW_DEPTH) != 0;
  57         ftsp = fts_open(paths, ftsflags, NULL);
  58         if (ftsp == NULL)
  59                 return (-1);
  60         while ((cur = fts_read(ftsp)) != NULL) {
  61                 switch (cur->fts_info) {
  62                 case FTS_D:
  63                         if (postorder)
  64                                 continue;
  65                         fnflag = FTW_D;
  66                         break;
  67                 case FTS_DC:
  68                         continue;
  69                 case FTS_DNR:
  70                         fnflag = FTW_DNR;
  71                         break;
  72                 case FTS_DP:
  73                         if (!postorder)
  74                                 continue;
  75                         fnflag = FTW_DP;
  76                         break;
  77                 case FTS_F:
  78                 case FTS_DEFAULT:
  79                         fnflag = FTW_F;
  80                         break;
  81                 case FTS_NS:
  82                 case FTS_NSOK:
  83                         fnflag = FTW_NS;
  84                         break;
  85                 case FTS_SL:
  86                         fnflag = FTW_SL;
  87                         break;
  88                 case FTS_SLNONE:
  89                         fnflag = FTW_SLN;
  90                         break;
  91                 default:
  92                         error = -1;
  93                         goto done;
  94                 }
  95                 ftw.base = cur->fts_pathlen - cur->fts_namelen;
  96                 ftw.level = cur->fts_level;
  97                 error = fn(cur->fts_path, cur->fts_statp, fnflag, &ftw);
  98                 if (error != 0)
  99                         break;
 100         }
 101 done:
 102         sverrno = errno;
 103         if (fts_close(ftsp) != 0 && error == 0)
 104                 error = -1;
 105         else
 106                 errno = sverrno;
 107         return (error);
 108 }