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72648326 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <ftw.h> | |
23 | ||
24 | #include "util.h" | |
c6878637 | 25 | #include "rm-rf.h" |
72648326 LP |
26 | #include "aufs-util.h" |
27 | ||
28 | static int nftw_cb( | |
29 | const char *fpath, | |
30 | const struct stat *sb, | |
31 | int flag, | |
32 | struct FTW *ftwbuf) { | |
33 | ||
34 | const char *fn, *original; | |
35 | char *p; | |
36 | int r; | |
37 | ||
38 | fn = fpath + ftwbuf->base; | |
39 | ||
40 | /* We remove all whiteout files, and all whiteouts */ | |
41 | ||
42 | original = startswith(fn, ".wh."); | |
43 | if (!original) | |
44 | return FTW_CONTINUE; | |
45 | ||
46 | log_debug("Removing whiteout indicator %s.", fpath); | |
c6878637 | 47 | r = rm_rf(fpath, REMOVE_ROOT|REMOVE_PHYSICAL); |
72648326 LP |
48 | if (r < 0) |
49 | return FTW_STOP; | |
50 | ||
51 | if (!startswith(fn, ".wh..wh.")) { | |
52 | ||
53 | p = alloca(ftwbuf->base + strlen(original)); | |
54 | strcpy(mempcpy(p, fpath, ftwbuf->base), original); | |
55 | ||
56 | log_debug("Removing deleted file %s.", p); | |
c6878637 | 57 | r = rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL); |
72648326 LP |
58 | if (r < 0) |
59 | return FTW_STOP; | |
60 | } | |
61 | ||
62 | return FTW_CONTINUE; | |
63 | } | |
64 | ||
65 | int aufs_resolve(const char *path) { | |
66 | int r; | |
67 | ||
68 | errno = 0; | |
69 | r = nftw(path, nftw_cb, 64, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL); | |
70 | if (r == FTW_STOP) | |
71 | return errno ? -errno : -EIO; | |
72 | ||
73 | return 0; | |
74 | } |