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      1 /* $NetBSD: ftw.c,v 1.1 2005/12/30 23:07:32 agc Exp $ */
      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 (at) 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: ftw.c,v 1.1 2005/12/30 23:07:32 agc Exp $");
     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 }
     99