ftw.c revision 223215 
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: head/lib/libc/gen/ftw.c 223215 2011-06-18 00:29:10Z delphij $");
25
26#include <sys/types.h>
27#include <sys/stat.h>
28#include <errno.h>
29#include <fts.h>
30#include <ftw.h>
31#include <limits.h>
32
33int
34ftw(const char *path, int (*fn)(const char *, const struct stat *, int),
35    int nfds)
36{
37	char * const paths[2] = { (char *)path, NULL };
38	FTSENT *cur;
39	FTS *ftsp;
40	int error = 0, fnflag, sverrno;
41
42	/* XXX - nfds is currently unused */
43	if (nfds < 1 || nfds > OPEN_MAX) {
44		errno = EINVAL;
45		return (-1);
46	}
47
48	ftsp = fts_open(paths, FTS_LOGICAL | FTS_COMFOLLOW | FTS_NOCHDIR, NULL);
49	if (ftsp == NULL)
50		return (-1);
51	while ((cur = fts_read(ftsp)) != NULL) {
52		switch (cur->fts_info) {
53		case FTS_D:
54			fnflag = FTW_D;
55			break;
56		case FTS_DNR:
57			fnflag = FTW_DNR;
58			break;
59		case FTS_DP:
60			/* we only visit in preorder */
61			continue;
62		case FTS_F:
63		case FTS_DEFAULT:
64			fnflag = FTW_F;
65			break;
66		case FTS_NS:
67		case FTS_NSOK:
68		case FTS_SLNONE:
69			fnflag = FTW_NS;
70			break;
71		case FTS_SL:
72			fnflag = FTW_SL;
73			break;
74		case FTS_DC:
75			errno = ELOOP;
76			/* FALLTHROUGH */
77		default:
78			error = -1;
79			goto done;
80		}
81		error = fn(cur->fts_path, cur->fts_statp, fnflag);
82		if (error != 0)
83			break;
84	}
85done:
86	sverrno = errno;
87	if (fts_close(ftsp) != 0 && error == 0)
88		error = -1;
89	else
90		errno = sverrno;
91	return (error);
92}
93