1 // SPDX-License-Identifier: GPL-2.0+
5 * Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
12 static void usage(void);
14 /* parameters initialized by core will be used by the image type code */
15 static struct image_tool_params params
= {
16 .type
= IH_TYPE_KERNEL
,
20 * dumpimage_extract_subimage -
22 * It scans all registered image types,
23 * verifies image_header for each supported image type
24 * if verification is successful, it extracts the desired file,
25 * indexed by pflag, from the image
27 * returns negative if input image format does not match with any of
28 * supported image types
30 static int dumpimage_extract_subimage(struct image_type_params
*tparams
,
31 void *ptr
, struct stat
*sbuf
)
35 if (tparams
->verify_header
) {
36 retval
= tparams
->verify_header((unsigned char *)ptr
,
37 sbuf
->st_size
, ¶ms
);
41 * Extract the file from the image
42 * if verify is successful
44 if (tparams
->extract_subimage
) {
45 retval
= tparams
->extract_subimage(ptr
, ¶ms
);
48 "%s: extract_subimage undefined for %s\n",
49 params
.cmdname
, tparams
->name
);
57 int main(int argc
, char **argv
)
63 int retval
= EXIT_SUCCESS
;
64 struct image_type_params
*tparams
= NULL
;
66 params
.cmdname
= *argv
;
68 while ((opt
= getopt(argc
, argv
, "hlo:T:p:V")) != -1) {
74 params
.outfile
= optarg
;
78 params
.type
= genimg_get_type_id(optarg
);
79 if (params
.type
< 0) {
80 fprintf(stderr
, "%s: Invalid type\n",
86 params
.pflag
= strtoul(optarg
, &ptr
, 10);
89 "%s: invalid file position %s\n",
90 params
.cmdname
, *argv
);
95 printf("dumpimage version %s\n", PLAIN_VERSION
);
108 if (optind
>= argc
) {
109 fprintf(stderr
, "%s: image file missing\n", params
.cmdname
);
113 params
.imagefile
= argv
[optind
];
115 /* set tparams as per input type_id */
116 tparams
= imagetool_get_type(params
.type
);
117 if (tparams
== NULL
) {
118 fprintf(stderr
, "%s: unsupported type: %s\n",
119 params
.cmdname
, genimg_get_type_name(params
.type
));
124 * check the passed arguments parameters meets the requirements
125 * as per image type to be generated/listed
127 if (tparams
->check_params
) {
128 if (tparams
->check_params(¶ms
)) {
129 fprintf(stderr
, "%s: Parameter check failed\n",
135 if (!params
.lflag
&& !params
.outfile
) {
136 fprintf(stderr
, "%s: No output file provided\n",
141 ifd
= open(params
.imagefile
, O_RDONLY
|O_BINARY
);
143 fprintf(stderr
, "%s: Can't open \"%s\": %s\n", params
.cmdname
,
144 params
.imagefile
, strerror(errno
));
148 if (fstat(ifd
, &sbuf
) < 0) {
149 fprintf(stderr
, "%s: Can't stat \"%s\": %s\n", params
.cmdname
,
150 params
.imagefile
, strerror(errno
));
154 if ((uint32_t)sbuf
.st_size
< tparams
->header_size
) {
155 fprintf(stderr
, "%s: Bad size: \"%s\" is not valid image\n",
156 params
.cmdname
, params
.imagefile
);
160 ptr
= mmap(0, sbuf
.st_size
, PROT_READ
, MAP_SHARED
, ifd
, 0);
161 if (ptr
== MAP_FAILED
) {
162 fprintf(stderr
, "%s: Can't read \"%s\": %s\n", params
.cmdname
,
163 params
.imagefile
, strerror(errno
));
168 * Both calls bellow scan through dumpimage registry for all
169 * supported image types and verify the input image file
174 * Extract the data files from within the matched
175 * image type. Returns the error code if not matched
177 retval
= dumpimage_extract_subimage(tparams
, ptr
, &sbuf
);
180 * Print the image information for matched image type
181 * Returns the error code if not matched
183 retval
= imagetool_verify_print_header(ptr
, &sbuf
, tparams
,
187 (void)munmap((void *)ptr
, sbuf
.st_size
);
193 static void usage(void)
195 fprintf(stderr
, "Usage: %s -l image\n"
196 " -l ==> list image header information\n",
199 " %s [-T type] [-p position] [-o outfile] image\n"
200 " -T ==> declare image type as 'type'\n"
201 " -p ==> 'position' (starting at 0) of the component to extract from image\n"
202 " -o ==> extract component to file 'outfile'\n",
205 " %s -h ==> print usage information and exit\n",
208 " %s -V ==> print version information and exit\n",