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
|
#define _GNU_SOURCE /* for tdestroy */
#include "statduplcheck.h"
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <search.h>
struct stat_info {
dev_t st_dev;
ino_t st_ino;
};
static void * info_root = NULL;
/* compare function passed to tsearch */
static int stat_info_compare(const void *si1, const void * si2)
{
int res;
res = ((struct stat_info*)si1)->st_dev - ((struct stat_info*)si2)->st_dev;
if (!res)
res = ((struct stat_info*)si1)->st_ino - ((struct stat_info*)si2)->st_ino;
return res;
}
int is_statduplicate(const struct stat *st) {
static struct stat_info * stinfo = NULL;
struct stat_info ** res;
if (!stinfo) {
stinfo = (struct stat_info*) malloc (sizeof(*stinfo));
if (!stinfo) {
fprintf(stderr, "cannot allocate memory\n");
exit(1);
}
}
stinfo->st_dev = st->st_dev;
stinfo->st_ino = st->st_ino;
if (!(res = tsearch(stinfo, &info_root, stat_info_compare))) {
fprintf(stderr, "cannot allocate memory\n");
exit(1);
}
if (*res == stinfo) {
// new record
stinfo = NULL;
return 0;
}
return 1;
}
int is_fileduplicate(const char *dir, const char *name) {
static struct stat stbuf;
static char fullpath[255];
if (strlen(dir) + strlen(name) + 2 > sizeof(fullpath)) return (-1);
strcpy(fullpath, dir);
strcat(fullpath, "/");
strcat(fullpath, name);
if (stat(fullpath,&stbuf)!=0) return(-1); /* file does not exists */
return is_statduplicate(&stbuf);
}
void free_statduplicates(void) {
if (!info_root) return;
tdestroy(info_root, free);
info_root = NULL;
}
|
