xref: /freebsd/lib/libc/gen/ftw.c (revision 63a938566d524836885917d95bd491aa4400b181)
1 /*	$OpenBSD: ftw.c,v 1.5 2005/08/08 08:05:34 espie 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 
23 #include <sys/cdefs.h>
24 __FBSDID("$FreeBSD$");
25 
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <errno.h>
29 #include <fts.h>
30 #include <ftw.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) {
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 }
92