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
|
/*
* Based on mkimage.c.
*
* Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include "dumpimage.h"
#include <image.h>
#include <version.h>
static void usage(void);
/* image_type_params linked list to maintain registered image types supports */
static struct image_type_params *dumpimage_tparams;
/* parameters initialized by core will be used by the image type code */
static struct image_tool_params params = {
.type = IH_TYPE_KERNEL,
};
/*
* dumpimage_extract_datafile -
*
* It scans all registered image types,
* verifies image_header for each supported image type
* if verification is successful, it extracts the desired file,
* indexed by pflag, from the image
*
* returns negative if input image format does not match with any of
* supported image types
*/
static int dumpimage_extract_datafile(void *ptr, struct stat *sbuf)
{
int retval = -1;
struct image_type_params *curr;
struct image_type_params *start = ll_entry_start(
struct image_type_params, image_type);
struct image_type_params *end = ll_entry_end(
struct image_type_params, image_type);
for (curr = start; curr != end; curr++) {
if (curr->verify_header) {
retval = curr->verify_header((unsigned char *)ptr,
sbuf->st_size, ¶ms);
if (retval != 0)
continue;
/*
* Extract the file from the image
* if verify is successful
*/
if (curr->extract_datafile) {
curr->extract_datafile(ptr, ¶ms);
} else {
fprintf(stderr,
"%s: extract_datafile undefined for %s\n",
params.cmdname, curr->name);
break;
}
}
}
return retval;
}
int main(int argc, char **argv)
{
int opt;
int ifd = -1;
struct stat sbuf;
char *ptr;
int retval = 0;
struct image_type_params *tparams = NULL;
params.cmdname = *argv;
while ((opt = getopt(argc, argv, "li:o:p:V")) != -1) {
switch (opt) {
case 'l':
params.lflag = 1;
break;
case 'i':
params.imagefile = optarg;
params.iflag = 1;
break;
case 'o':
params.outfile = optarg;
break;
case 'p':
params.pflag = strtoul(optarg, &ptr, 10);
if (*ptr) {
fprintf(stderr,
"%s: invalid file position %s\n",
params.cmdname, *argv);
exit(EXIT_FAILURE);
}
break;
case 'V':
printf("dumpimage version %s\n", PLAIN_VERSION);
exit(EXIT_SUCCESS);
default:
usage();
}
}
if (optind >= argc)
usage();
/* set tparams as per input type_id */
tparams = imagetool_get_type(params.type);
if (tparams == NULL) {
fprintf(stderr, "%s: unsupported type %s\n",
params.cmdname, genimg_get_type_name(params.type));
exit(EXIT_FAILURE);
}
/*
* check the passed arguments parameters meets the requirements
* as per image type to be generated/listed
*/
if (tparams->check_params) {
if (tparams->check_params(¶ms))
usage();
}
if (params.iflag)
params.datafile = argv[optind];
else
params.imagefile = argv[optind];
if (!params.outfile)
params.outfile = params.datafile;
ifd = open(params.imagefile, O_RDONLY|O_BINARY);
if (ifd < 0) {
fprintf(stderr, "%s: Can't open \"%s\": %s\n",
params.cmdname, params.imagefile,
strerror(errno));
exit(EXIT_FAILURE);
}
if (params.lflag || params.iflag) {
if (fstat(ifd, &sbuf) < 0) {
fprintf(stderr, "%s: Can't stat \"%s\": %s\n",
params.cmdname, params.imagefile,
strerror(errno));
exit(EXIT_FAILURE);
}
if ((unsigned)sbuf.st_size < tparams->header_size) {
fprintf(stderr,
"%s: Bad size: \"%s\" is not valid image\n",
params.cmdname, params.imagefile);
exit(EXIT_FAILURE);
}
ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, ifd, 0);
if (ptr == MAP_FAILED) {
fprintf(stderr, "%s: Can't read \"%s\": %s\n",
params.cmdname, params.imagefile,
strerror(errno));
exit(EXIT_FAILURE);
}
/*
* Both calls bellow scan through dumpimage registry for all
* supported image types and verify the input image file
* header for match
*/
if (params.iflag) {
/*
* Extract the data files from within the matched
* image type. Returns the error code if not matched
*/
retval = dumpimage_extract_datafile(ptr, &sbuf);
} else {
/*
* Print the image information for matched image type
* Returns the error code if not matched
*/
retval = imagetool_verify_print_header(ptr, &sbuf,
tparams, ¶ms);
}
(void)munmap((void *)ptr, sbuf.st_size);
(void)close(ifd);
return retval;
}
(void)close(ifd);
return EXIT_SUCCESS;
}
static void usage(void)
{
fprintf(stderr, "Usage: %s -l image\n"
" -l ==> list image header information\n",
params.cmdname);
fprintf(stderr,
" %s -i image [-p position] [-o outfile] data_file\n"
" -i ==> extract from the 'image' a specific 'data_file'"
", indexed by 'position' (starting at 0)\n",
params.cmdname);
fprintf(stderr,
" %s -V ==> print version information and exit\n",
params.cmdname);
exit(EXIT_FAILURE);
}
|
