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
30 int
ftw(const char * path,int (* fn)(const char *,const struct stat *,int),int nfds)31 ftw(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 }
82 done:
83 sverrno = errno;
84 if (fts_close(ftsp) != 0 && error == 0)
85 error = -1;
86 else
87 errno = sverrno;
88 return (error);
89 }
90