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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
#include "operations.h" // This header includes the fuse.h header.
#include "headers.h"
#include "support/gutils.h"
#include "support/gstring.h"
#include "support/gstats.h"
#include "externs.h"
#include "errors.h"
#include "retriever/retriever.h"
#include "layout/core.h"
// public:
int revs_getattr(const char *path, struct stat *stbuf){
struct stats *stats;
memset(stbuf, 0, sizeof(struct stat));
debug(1, "Attributes for path %s;\n", path);
if (get_file(file_system_info, path, &stats) != 0) {
debug(1, "Failed to retrieve stats;\n");
return -1;
}
stbuf->st_size = stats->size;
if (stats->type == S_IFDIR)
stbuf->st_mode = stats->type | 0555;
else
stbuf->st_mode = stats->type | 0444;
stbuf->st_nlink = stats->nlink;
stbuf->st_mtime = stats->ctime;
stbuf->st_ctime = stats->ctime;
stbuf->st_atime = stats->atime;
gstrdel(stats->path);
free(stats);
debug(1, "Retrieved attributes\n");
return 0;
};
int revs_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi){
(void) offset;
(void) fi;
int i = 0;
struct stats *stats = NULL;
debug(1, "Received path %s;\n", path);
if (get_file(file_system_info, path, &stats) != 0)
return -ENOENT;
gstrdel(stats->path);
free(stats);
filler(buf, ".", NULL, 0);
filler(buf, "..", NULL, 0);
debug(1, "Reading content of the eturned directory\n");
char **content = get_children(file_system_info, path);
if (content == NULL){
debug(1, "Error occured while looking for children;");
return 0;
}
for (i = 0; content[i] != 0; i++)
filler(buf, content[i], NULL, 0);
debug(1, "There were %d children in this directory;\n", i);
for (i = 0; content[i] != 0; i++)
free(content[i]);
free(content);
return 0;
};
int revs_readlink(const char *path, char *buf, size_t size){
(void) size;
struct stats *stats;
if ((get_file(file_system_info, path, &stats) != 0) || (stats->type != S_IFLNK))
return -1;
strcpy(buf, stats->link);
return 0;
};
int revs_open(const char *path, struct fuse_file_info *fi){
(void) fi;
struct stats *stats;
if (get_file(file_system_info, path, &stats) == -1)
return -1;
if (stats->type & S_IFDIR)
return -1;
int result = retrieve(file_system_info, stats);
gstrdel(stats->path);
free(stats);
return result;
};
int revs_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi){
(void) fi;
#define revs_read_finish(value) { \
close(descriptor); \
return value; \
}
struct stats *stats = NULL;
int descriptor = 0;
int result = 0;
debug(1, "Reading file %s;\n", path);
if (get_file(file_system_info, path, &stats) == -1)
return -1;
if (stats->type & S_IFDIR)
return -1;
char *tmp_path = get_tmp_path(stats->path);
debug(1, "Retrieved stats for path %s with tmp path %s\n", stats->path, tmp_path);
gstrdel(stats->path);
free(stats);
if (!tmp_path)
return -1;
if ((descriptor = open(tmp_path, O_RDONLY)) == -1)
return -1;
if ((result = lseek(descriptor, offset, SEEK_SET)) != offset)
revs_read_finish(-1);
if ((result = read(descriptor, buf, size)) == -1)
revs_read_finish(-1);
debug(1, "%d bytes have been read;\n", result);
revs_read_finish(result);
}
int revs_release(const char *path, struct fuse_file_info *fi){
(void) fi;
struct stats *stats = NULL;
get_file(file_system_info, path, &stats);
if (stats == NULL){
gstrdel(stats->path);
free(stats);
return -1;
}
int result = release(file_system_info, stats);
gstrdel(stats->path);
free(stats);
return result;
};
void revs_destroy(void *ptr){
(void) ptr;
DIR *dir = NULL;
char *path = NULL;
struct dirent *entry = NULL;
if (data_dir == NULL)
return;
dir = opendir(data_dir);
if (dir == NULL)
return;
for (entry = readdir(dir); entry != NULL; entry = readdir(dir)){
gmstrcpy(&path, data_dir, "/", entry->d_name, 0);
unlink(path);
};
closedir(dir);
debug(1, "Deleting temporary directory %s;\n", data_dir);
rmdir(data_dir);
gstrdel(path);
};
|
