xref: /openbsd-src/lib/libc/gen/ftw.c (revision db3296cf5c1dd9058ceecc3a29fe4aaa0bd26000)
1 /*	$OpenBSD: ftw.c,v 1.2 2003/07/21 21:15:32 millert Exp $	*/
2 
3 /*
4  * Copyright (c) 2003 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 #if defined(LIBC_SCCS) && !defined(lint)
24 static const char rcsid[] = "$OpenBSD: ftw.c,v 1.2 2003/07/21 21:15:32 millert Exp $";
25 #endif /* LIBC_SCCS and not lint */
26 
27 #include <sys/types.h>
28 #include <sys/stat.h>
29 #include <errno.h>
30 #include <fts.h>
31 #include <ftw.h>
32 #include <limits.h>
33 
34 int
35 ftw(const char *path, int (*fn)(const char *, const struct stat *, int),
36     int nfds)
37 {
38 	const char *paths[2];
39 	FTSENT *cur;
40 	FTS *ftsp;
41 	int fnflag, error, sverrno;
42 
43 	/* XXX - nfds is currently unused */
44 	if (nfds < 1 || nfds > OPEN_MAX) {
45 		errno = EINVAL;
46 		return (-1);
47 	}
48 
49 	paths[0] = path;
50 	paths[1] = NULL;
51 	ftsp = fts_open((char * const *)paths, FTS_COMFOLLOW | FTS_NOCHDIR,
52 	    NULL);
53 	if (ftsp == NULL)
54 		return (-1);
55 	error = 0;
56 	while ((cur = fts_read(ftsp)) != NULL) {
57 		switch (cur->fts_info) {
58 		case FTS_D:
59 			fnflag = FTW_D;
60 			break;
61 		case FTS_DNR:
62 			fnflag = FTW_DNR;
63 			break;
64 		case FTS_DP:
65 			/* we only visit in preorder */
66 			continue;
67 		case FTS_F:
68 		case FTS_DEFAULT:
69 			fnflag = FTW_F;
70 			break;
71 		case FTS_NS:
72 		case FTS_NSOK:
73 		case FTS_SLNONE:
74 			fnflag = FTW_NS;
75 			break;
76 		case FTS_SL:
77 			fnflag = FTW_SL;
78 			break;
79 		case FTS_DC:
80 			errno = ELOOP;
81 			/* FALLTHROUGH */
82 		default:
83 			error = -1;
84 			goto done;
85 		}
86 		error = fn(cur->fts_path, cur->fts_statp, fnflag);
87 		if (error != 0)
88 			break;
89 	}
90 done:
91 	sverrno = errno;
92 	(void) fts_close(ftsp);
93 	errno = sverrno;
94 	return (error);
95 }
96