1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
Copyright (C) Andrew Tridgell 1996
Copyright (C) Paul Mackerras 1996
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "rsync.h"
extern int dry_run;
extern int verbose;
#if SUPPORT_HARD_LINKS
static int hlink_compare(struct file_struct *f1,struct file_struct *f2)
{
if (!S_ISREG(f1->mode) && !S_ISREG(f2->mode)) return 0;
if (!S_ISREG(f1->mode)) return -1;
if (!S_ISREG(f2->mode)) return 1;
if (f1->dev != f2->dev)
return (int)(f1->dev>f2->dev?1:-1);
if (f1->inode != f2->inode)
return (int)(f1->inode>f2->inode?1:-1);
return file_compare(&f1,&f2);
}
static struct file_struct *hlink_list;
static int hlink_count;
#endif
void init_hard_links(struct file_list *flist)
{
#if SUPPORT_HARD_LINKS
int i;
if (flist->count < 2) return;
if (hlink_list) free(hlink_list);
if (!(hlink_list =
(struct file_struct *)malloc(sizeof(hlink_list[0])*flist->count)))
out_of_memory("init_hard_links");
for (i = 0; i < flist->count; i++)
memcpy(&hlink_list[i], flist->files[i], sizeof(hlink_list[0]));
qsort(hlink_list,flist->count,
sizeof(hlink_list[0]),
(int (*)())hlink_compare);
hlink_count=flist->count;
#endif
}
/* check if a file should be skipped because it is the same as an
earlier hard link */
int check_hard_link(struct file_struct *file)
{
#if SUPPORT_HARD_LINKS
int low=0,high=hlink_count-1;
int ret=0;
if (!hlink_list || !S_ISREG(file->mode)) return 0;
while (low != high) {
int mid = (low+high)/2;
ret = hlink_compare(&hlink_list[mid],file);
if (ret == 0) {
low = mid;
break;
}
if (ret > 0)
high=mid;
else
low=mid+1;
}
if (hlink_compare(&hlink_list[low],file) != 0) return 0;
if (low > 0 &&
S_ISREG(hlink_list[low-1].mode) &&
file->dev == hlink_list[low-1].dev &&
file->inode == hlink_list[low-1].inode)
return 1;
#endif
return 0;
}
#if SUPPORT_HARD_LINKS
static void hard_link_one(int i)
{
STRUCT_STAT st1,st2;
if (link_stat(f_name(&hlink_list[i-1]),&st1) != 0) return;
if (link_stat(f_name(&hlink_list[i]),&st2) != 0) {
if (do_link(f_name(&hlink_list[i-1]),f_name(&hlink_list[i])) != 0) {
if (verbose > 0)
rprintf(FINFO,"link %s => %s : %s\n",
f_name(&hlink_list[i]),
f_name(&hlink_list[i-1]),strerror(errno));
return;
}
} else {
if (st2.st_dev == st1.st_dev && st2.st_ino == st1.st_ino) return;
if (do_unlink(f_name(&hlink_list[i])) != 0 ||
do_link(f_name(&hlink_list[i-1]),f_name(&hlink_list[i])) != 0) {
if (verbose > 0)
rprintf(FINFO,"link %s => %s : %s\n",
f_name(&hlink_list[i]),
f_name(&hlink_list[i-1]),strerror(errno));
return;
}
}
if (verbose > 0)
rprintf(FINFO,"%s => %s\n",
f_name(&hlink_list[i]),f_name(&hlink_list[i-1]));
}
#endif
/* create any hard links in the flist */
void do_hard_links(struct file_list *flist)
{
#if SUPPORT_HARD_LINKS
int i;
if (!hlink_list) return;
for (i=1;i<hlink_count;i++) {
if (S_ISREG(hlink_list[i].mode) &&
S_ISREG(hlink_list[i-1].mode) &&
hlink_list[i].basename && hlink_list[i-1].basename &&
hlink_list[i].dev == hlink_list[i-1].dev &&
hlink_list[i].inode == hlink_list[i-1].inode) {
hard_link_one(i);
}
}
#endif
}
|
