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
|
/*
* e2image.c --- Program which writes an image file backing up
* critical metadata for the filesystem.
*
* Copyright 2000, 2001 by Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
#include <fcntl.h>
#include <grp.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern char *optarg;
extern int optind;
#endif
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <linux/ext2_fs.h>
#include "ext2fs/ext2fs.h"
#include "et/com_err.h"
#include "uuid/uuid.h"
#include "e2p/e2p.h"
#include "ext2fs/e2image.h"
#include "../version.h"
#include "nls-enable.h"
const char * program_name = "e2image";
char * device_name = NULL;
static void usage(void)
{
fprintf(stderr, _("Usage: %s device file\n"), program_name);
exit (1);
}
static void write_header(int fd, struct ext2_image_hdr *hdr, int blocksize)
{
char *header_buf;
int actual;
header_buf = malloc(blocksize);
if (!header_buf) {
fprintf(stderr, _("Couldn't allocate header buffer\n"));
exit(1);
}
if (lseek(fd, 0, SEEK_SET) < 0) {
perror("lseek while writing header");
exit(1);
}
memset(header_buf, 0, blocksize);
if (hdr)
memcpy(header_buf, hdr, sizeof(struct ext2_image_hdr));
actual = write(fd, header_buf, blocksize);
if (actual < 0) {
perror("write header");
exit(1);
}
if (actual != blocksize) {
fprintf(stderr, _("short write (only %d bytes) for"
"writing image header"), actual);
exit(1);
}
free(header_buf);
}
int main (int argc, char ** argv)
{
int c;
errcode_t retval;
ext2_filsys fs;
int open_flag = 0;
int raw_flag = 0;
int fd = 0;
struct ext2_image_hdr hdr;
struct stat st;
#ifdef ENABLE_NLS
setlocale(LC_MESSAGES, "");
bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
textdomain(NLS_CAT_NAME);
#endif
fprintf (stderr, _("e2image %s, %s for EXT2 FS %s, %s\n"),
E2FSPROGS_VERSION, E2FSPROGS_DATE,
EXT2FS_VERSION, EXT2FS_DATE);
if (argc && *argv)
program_name = *argv;
initialize_ext2_error_table();
while ((c = getopt (argc, argv, "r")) != EOF)
switch (c) {
case 'r':
raw_flag++;
break;
default:
usage();
}
if (optind != argc - 2 )
usage();
device_name = argv[optind];
retval = ext2fs_open (device_name, open_flag, 0, 0,
unix_io_manager, &fs);
if (retval) {
com_err (program_name, retval, _("while trying to open %s"),
device_name);
printf(_("Couldn't find valid filesystem superblock.\n"));
exit(1);
}
fd = open(argv[optind+1], O_CREAT|O_RDWR, 0600);
if (fd < 0) {
com_err(program_name, errno, _("while trying to open %s"),
argv[optind+1]);
exit(1);
}
write_header(fd, NULL, fs->blocksize);
memset(&hdr, 0, sizeof(struct ext2_image_hdr));
hdr.offset_super = lseek(fd, 0, SEEK_CUR);
retval = ext2fs_image_super_write(fs, fd, 0);
if (retval) {
com_err(program_name, retval, _("while writing superblock"));
exit(1);
}
hdr.offset_inode = lseek(fd, 0, SEEK_CUR);
retval = ext2fs_image_inode_write(fs, fd, IMAGER_FLAG_SPARSEWRITE);
if (retval) {
com_err(program_name, retval, _("while writing inode table"));
exit(1);
}
hdr.offset_blockmap = lseek(fd, 0, SEEK_CUR);
retval = ext2fs_image_bitmap_write(fs, fd, 0);
if (retval) {
com_err(program_name, retval, _("while writing block bitmap"));
exit(1);
}
hdr.offset_inodemap = lseek(fd, 0, SEEK_CUR);
retval = ext2fs_image_bitmap_write(fs, fd, IMAGER_FLAG_INODEMAP);
if (retval) {
com_err(program_name, retval, _("while writing inode bitmap"));
exit(1);
}
hdr.magic_number = EXT2_ET_MAGIC_E2IMAGE;
strcpy(hdr.magic_descriptor, "Ext2 Image 1.0");
gethostname(hdr.fs_hostname, sizeof(hdr.fs_hostname));
strncat(hdr.fs_device_name, device_name, sizeof(hdr.fs_device_name));
hdr.fs_device_name[sizeof(hdr.fs_device_name) - 1] = 0;
hdr.fs_blocksize = fs->blocksize;
if (stat(device_name, &st) == 0)
hdr.fs_device = st.st_rdev;
if (fstat(fd, &st) == 0) {
hdr.image_device = st.st_dev;
hdr.image_inode = st.st_ino;
}
memcpy(hdr.fs_uuid, fs->super->s_uuid, sizeof(hdr.fs_uuid));
hdr.image_time = time(0);
write_header(fd, &hdr, fs->blocksize);
ext2fs_close (fs);
exit (0);
}
|
