Commit | Line | Data |
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6aae748e | 1 | /* |
dc5ddbcc AT |
2 | Copyright (C) Andrew Tridgell 1996 |
3 | Copyright (C) Paul Mackerras 1996 | |
6e69cff1 | 4 | Copyright (C) 2002 by Martin Pool <mbp@samba.org> |
6aae748e | 5 | |
dc5ddbcc AT |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
6aae748e | 10 | |
dc5ddbcc AT |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
6aae748e | 15 | |
dc5ddbcc AT |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #include "rsync.h" | |
22 | ||
dc5ddbcc | 23 | extern int dry_run; |
9a52223b | 24 | extern int verbose; |
dc5ddbcc AT |
25 | |
26 | #if SUPPORT_HARD_LINKS | |
11dc2740 | 27 | static int hlink_compare(struct file_struct **file1, struct file_struct **file2) |
dc5ddbcc | 28 | { |
11dc2740 S |
29 | struct file_struct *f1 = *file1; |
30 | struct file_struct *f2 = *file2; | |
31 | ||
92cc9dd7 WD |
32 | if (f1->F_DEV != f2->F_DEV) |
33 | return (int) (f1->F_DEV > f2->F_DEV ? 1 : -1); | |
dc5ddbcc | 34 | |
92cc9dd7 WD |
35 | if (f1->F_INODE != f2->F_INODE) |
36 | return (int) (f1->F_INODE > f2->F_INODE ? 1 : -1); | |
dc5ddbcc | 37 | |
11dc2740 S |
38 | return file_compare(file1, file2); |
39 | } | |
dc5ddbcc | 40 | |
d38fc305 WD |
41 | struct file_struct **hlink_list; |
42 | int hlink_count; | |
1d5cda22 WD |
43 | |
44 | #define LINKED(p1,p2) ((p1)->F_DEV == (p2)->F_DEV \ | |
45 | && (p1)->F_INODE == (p2)->F_INODE) | |
46 | ||
47 | /* Analyze the data in the hlink_list[], remove items that aren't multiply | |
90481755 | 48 | * linked, and replace the dev+inode data with the hlindex+next linked list. */ |
1d5cda22 WD |
49 | static void link_idev_data(void) |
50 | { | |
51 | struct file_struct *head; | |
52 | int from, to, start; | |
53 | ||
54 | for (from = to = 0; from < hlink_count; from++) { | |
55 | start = from; | |
56 | head = hlink_list[start]; | |
57 | while (from < hlink_count-1 | |
58 | && LINKED(hlink_list[from], hlink_list[from+1])) { | |
d38fc305 | 59 | hlink_list[from]->F_HLINDEX = to; |
1d5cda22 WD |
60 | hlink_list[from]->F_NEXT = hlink_list[from+1]; |
61 | from++; | |
62 | } | |
63 | if (from > start) { | |
d38fc305 WD |
64 | hlink_list[from]->F_HLINDEX = to; |
65 | hlink_list[from]->F_NEXT = head; | |
66 | hlink_list[from]->flags |= FLAG_HLINK_EOL; | |
1d5cda22 WD |
67 | hlink_list[to++] = head; |
68 | } else { | |
69 | free((char*)head->link_u.idev); | |
70 | head->link_u.idev = NULL; | |
71 | } | |
72 | } | |
73 | ||
74 | if (!to) { | |
75 | free(hlink_list); | |
76 | hlink_list = NULL; | |
77 | } else { | |
78 | hlink_count = to; | |
79 | if (!(hlink_list = realloc_array(hlink_list, | |
80 | struct file_struct *, hlink_count))) | |
81 | out_of_memory("init_hard_links"); | |
82 | } | |
83 | } | |
dc5ddbcc AT |
84 | #endif |
85 | ||
86 | void init_hard_links(struct file_list *flist) | |
87 | { | |
88 | #if SUPPORT_HARD_LINKS | |
dd04a034 | 89 | int i; |
11dc2740 | 90 | |
6e69cff1 MP |
91 | if (flist->count < 2) |
92 | return; | |
dc5ddbcc | 93 | |
6e69cff1 MP |
94 | if (hlink_list) |
95 | free(hlink_list); | |
96 | ||
11dc2740 | 97 | if (!(hlink_list = new_array(struct file_struct *, flist->count))) |
dd04a034 | 98 | out_of_memory("init_hard_links"); |
6aae748e | 99 | |
11dc2740 S |
100 | hlink_count = 0; |
101 | for (i = 0; i < flist->count; i++) { | |
92cc9dd7 | 102 | if (flist->files[i]->link_u.idev) |
11dc2740 S |
103 | hlink_list[hlink_count++] = flist->files[i]; |
104 | } | |
dc5ddbcc | 105 | |
11dc2740 | 106 | qsort(hlink_list, hlink_count, |
6e69cff1 | 107 | sizeof(hlink_list[0]), (int (*)()) hlink_compare); |
dc5ddbcc | 108 | |
6aae748e WD |
109 | if (!hlink_count) { |
110 | free(hlink_list); | |
111 | hlink_list = NULL; | |
1d5cda22 WD |
112 | } else |
113 | link_idev_data(); | |
dc5ddbcc | 114 | #endif |
dc5ddbcc AT |
115 | } |
116 | ||
d38fc305 WD |
117 | int hard_link_check(struct file_struct *file, int skip) |
118 | { | |
119 | if (!file->link_u.links) | |
120 | return 0; | |
121 | if (skip && !(file->flags & FLAG_HLINK_EOL)) | |
122 | hlink_list[file->F_HLINDEX] = file->F_NEXT; | |
123 | if (hlink_list[file->F_HLINDEX] != file) { | |
124 | if (verbose > 1) { | |
125 | rprintf(FINFO, "\"%s\" is a hard link\n", | |
126 | f_name(file)); | |
127 | } | |
128 | return 1; | |
129 | } | |
130 | return 0; | |
131 | } | |
132 | ||
a16bbc39 | 133 | #if SUPPORT_HARD_LINKS |
1d5cda22 | 134 | static void hard_link_one(char *hlink1, char *hlink2) |
a16bbc39 | 135 | { |
1d5cda22 WD |
136 | if (do_link(hlink1, hlink2)) { |
137 | if (verbose > 0) { | |
138 | rprintf(FINFO, "link %s => %s failed: %s\n", | |
139 | hlink2, hlink1, strerror(errno)); | |
a16bbc39 AT |
140 | } |
141 | } | |
1d5cda22 | 142 | else if (verbose > 0) |
310c9f30 | 143 | rprintf(FINFO, "%s => %s\n", hlink2, hlink1); |
a16bbc39 AT |
144 | } |
145 | #endif | |
146 | ||
fae5bb31 MP |
147 | |
148 | ||
149 | /** | |
150 | * Create any hard links in the global hlink_list. They were put | |
151 | * there by running init_hard_links on the filelist. | |
152 | **/ | |
153 | void do_hard_links(void) | |
dc5ddbcc AT |
154 | { |
155 | #if SUPPORT_HARD_LINKS | |
d38fc305 | 156 | struct file_struct *file, *first; |
3fef5364 WD |
157 | char hlink1[MAXPATHLEN]; |
158 | char *hlink2; | |
1d5cda22 | 159 | STRUCT_STAT st1, st2; |
a16bbc39 | 160 | int i; |
a16bbc39 | 161 | |
6e69cff1 MP |
162 | if (!hlink_list) |
163 | return; | |
164 | ||
1d5cda22 | 165 | for (i = 0; i < hlink_count; i++) { |
d38fc305 WD |
166 | first = file = hlink_list[i]; |
167 | if (link_stat(f_name_to(first, hlink1), &st1) != 0) | |
1d5cda22 | 168 | continue; |
d38fc305 | 169 | while ((file = file->F_NEXT) != first) { |
1d5cda22 WD |
170 | hlink2 = f_name(file); |
171 | if (link_stat(hlink2, &st2) == 0) { | |
172 | if (st2.st_dev == st1.st_dev | |
173 | && st2.st_ino == st1.st_ino) | |
174 | continue; | |
175 | if (robust_unlink(hlink2)) { | |
176 | if (verbose > 0) { | |
177 | rprintf(FINFO, | |
178 | "unlink %s failed: %s\n", | |
179 | full_fname(hlink2), | |
180 | strerror(errno)); | |
181 | } | |
182 | continue; | |
183 | } | |
184 | } | |
185 | hard_link_one(hlink1, hlink2); | |
6e69cff1 | 186 | } |
dc5ddbcc | 187 | } |
dc5ddbcc AT |
188 | #endif |
189 | } |