1/*	$OpenBSD: ftw.c,v 1.6 2019/01/25 00:19:25 millert Exp $	*/
2
3/*
4 * Copyright (c) 2003, 2004 Todd C. Miller <millert@openbsd.org>
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/types.h>
24#include <sys/stat.h>
25#include <errno.h>
26#include <fts.h>
27#include <ftw.h>
28#include <limits.h>
29
30int
31ftw(const char *path, int (*fn)(const char *, const struct stat *, int),
32    int nfds)
33{
34	char * const paths[2] = { (char *)path, NULL };
35	FTSENT *cur;
36	FTS *ftsp;
37	int error = 0, fnflag, sverrno;
38
39	/* XXX - nfds is currently unused */
40	if (nfds < 1 || nfds > OPEN_MAX) {
41		errno = EINVAL;
42		return (-1);
43	}
44
45	ftsp = fts_open(paths, FTS_LOGICAL | FTS_COMFOLLOW | FTS_NOCHDIR, NULL);
46	if (ftsp == NULL)
47		return (-1);
48	while ((cur = fts_read(ftsp)) != NULL) {
49		switch (cur->fts_info) {
50		case FTS_D:
51			fnflag = FTW_D;
52			break;
53		case FTS_DNR:
54			fnflag = FTW_DNR;
55			break;
56		case FTS_DP:
57			/* we only visit in preorder */
58			continue;
59		case FTS_F:
60		case FTS_DEFAULT:
61			fnflag = FTW_F;
62			break;
63		case FTS_NS:
64		case FTS_NSOK:
65		case FTS_SLNONE:
66			fnflag = FTW_NS;
67			break;
68		case FTS_SL:
69			fnflag = FTW_SL;
70			break;
71		case FTS_DC:
72			errno = ELOOP;
73			/* FALLTHROUGH */
74		default:
75			error = -1;
76			goto done;
77		}
78		error = fn(cur->fts_path, cur->fts_statp, fnflag);
79		if (error != 0)
80			break;
81	}
82done:
83	sverrno = errno;
84	if (fts_close(ftsp) != 0 && error == 0)
85		error = -1;
86	else
87		errno = sverrno;
88	return (error);
89}
90