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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/* Copyright 2019 Ján Sučan <jan@jansucan.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "resources.h"
#include "print.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static void
resources_init_for_backup(resources_backup_t *const res)
{
res->in_file = NULL;
res->ref_file = NULL;
res->out_file = NULL;
res->in_buffer = NULL;
res->ref_buffer = NULL;
res->out_buffer = NULL;
}
static int
resources_allocate_for_backup(const options_backup_t *const opts,
resources_backup_t *const res)
{
if ((res->in_file = fopen(opts->in_file_path, "r")) == NULL) {
print_error("cannot open input file: %s", strerror(errno));
return 1;
}
if ((res->ref_file = fopen(opts->ref_file_path, "r")) == NULL) {
print_error("cannot open reference file: %s", strerror(errno));
return 1;
}
/* When backing up, the output file is truncated to hold the
* new data
*/
if ((res->out_file = fopen(opts->out_file_path, "w+")) == NULL) {
print_error("cannot open output file: %s", strerror(errno));
return 1;
}
/* The output buffer contains also the offsets */
res->out_buffer_size =
((opts->buffer_size / opts->sector_size) * sizeof(uint64_t)) +
opts->buffer_size;
// TODO: separate function
if ((res->in_buffer = (char *)malloc(opts->buffer_size)) == NULL) {
print_error("cannot allocate buffer for input file data");
return 1;
} else if ((res->ref_buffer = (char *)malloc(opts->buffer_size)) == NULL) {
print_error("cannot allocate buffer for reference file data");
return 1;
} else if ((res->out_buffer = (char *)malloc(res->out_buffer_size)) ==
NULL) {
print_error("cannot allocate buffer for output file data");
return 1;
}
return 0;
}
static void
resources_init_for_restore(resources_restore_t *const res)
{
res->in_file = NULL;
res->out_file = NULL;
res->in_buffer = NULL;
res->out_buffer = NULL;
}
static int
resources_allocate_for_restore(const options_restore_t *const opts,
resources_restore_t *const res)
{
if ((res->in_file = fopen(opts->in_file_path, "r")) == NULL) {
print_error("cannot open input file: %s", strerror(errno));
return 1;
}
/* When restoring, the file must be opened for writing and not
* truncated
*/
if ((res->out_file = fopen(opts->out_file_path, "r+")) == NULL) {
print_error("cannot open output file: %s", strerror(errno));
return 1;
}
/* Allocate the buffer for data from the input file */
/* The input buffer contains also the offsets */
res->in_sector_size = sizeof(uint64_t) + opts->sector_size;
const size_t in_buffer_sector_count =
opts->buffer_size / res->in_sector_size;
res->in_buffer_size = in_buffer_sector_count * res->in_sector_size;
if ((res->in_buffer = (char *)malloc(res->in_buffer_size)) == NULL) {
print_error("cannot allocate buffer for input file data");
return 1;
}
return 0;
}
static void
resources_close_file(FILE **const file)
{
if (*file != NULL) {
fclose(*file);
*file = NULL;
}
}
static void
resources_close_buffer(char **const buffer)
{
if (*buffer != NULL) {
free(*buffer);
*buffer = NULL;
}
}
static void
resources_free_backup(resources_backup_t *const res)
{
resources_close_file(&(res->in_file));
resources_close_file(&(res->ref_file));
resources_close_file(&(res->out_file));
resources_close_buffer(&(res->in_buffer));
resources_close_buffer(&(res->ref_buffer));
resources_close_buffer(&(res->out_buffer));
}
static void
resources_free_restore(resources_restore_t *const res)
{
resources_close_file(&(res->in_file));
resources_close_file(&(res->out_file));
resources_close_buffer(&(res->in_buffer));
resources_close_buffer(&(res->out_buffer));
}
int
resources_allocate(const options_t *const opts, resources_t *const res)
{
res->operation_id = opts->operation_id;
if (res->operation_id == OPERATION_ID_BACKUP) {
resources_init_for_backup(&(res->res.backup));
return resources_allocate_for_backup(&(opts->op.backup),
&(res->res.backup));
} else if (res->operation_id == OPERATION_ID_RESTORE) {
resources_init_for_restore(&(res->res.restore));
return resources_allocate_for_restore(&(opts->op.restore),
&(res->res.restore));
}
return 0;
}
const resources_backup_t *
resources_get_for_backup(const resources_t *const res)
{
return &(res->res.backup);
}
const resources_restore_t *
resources_get_for_restore(const resources_t *const res)
{
return &(res->res.restore);
}
void
resources_free(resources_t *const res)
{
if (res->operation_id == OPERATION_ID_BACKUP) {
resources_free_backup(&(res->res.backup));
} else if (res->operation_id == OPERATION_ID_RESTORE) {
resources_free_restore(&(res->res.restore));
}
res->operation_id = OPERATION_ID_UNKNOWN;
}
|
