imagetool.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2013
*
* Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
*/
#include "imagetool.h"
#include <image.h>
struct image_type_params *imagetool_get_type(int type)
{
struct image_type_params **curr;
INIT_SECTION(image_type);
struct image_type_params **start = __start_image_type;
struct image_type_params **end = __stop_image_type;
for (curr = start; curr != end; curr++) {
if ((*curr)->check_image_type) {
if (!(*curr)->check_image_type(type))
return *curr;
}
}
return NULL;
}
int imagetool_verify_print_header(
void *ptr,
struct stat *sbuf,
struct image_type_params *tparams,
struct image_tool_params *params)
{
int retval = -1;
struct image_type_params **curr;
INIT_SECTION(image_type);
struct image_type_params **start = __start_image_type;
struct image_type_params **end = __stop_image_type;
for (curr = start; curr != end; curr++) {
if ((*curr)->verify_header) {
retval = (*curr)->verify_header((unsigned char *)ptr,
sbuf->st_size, params);
if (retval == 0) {
/*
* Print the image information if verify is
* successful
*/
if ((*curr)->print_header) {
if (!params->quiet)
(*curr)->print_header(ptr);
} else {
fprintf(stderr,
"%s: print_header undefined for %s\n",
params->cmdname, (*curr)->name);
}
break;
}
}
}
return retval;
}
int imagetool_verify_print_header_by_type(
void *ptr,
struct stat *sbuf,
struct image_type_params *tparams,
struct image_tool_params *params)
{
int retval;
retval = tparams->verify_header((unsigned char *)ptr, sbuf->st_size,
params);
if (retval == 0) {
/*
* Print the image information if verify is successful
*/
if (tparams->print_header) {
if (!params->quiet)
tparams->print_header(ptr);
} else {
fprintf(stderr,
"%s: print_header undefined for %s\n",
params->cmdname, tparams->name);
}
} else {
fprintf(stderr,
"%s: verify_header failed for %s with exit code %d\n",
params->cmdname, tparams->name, retval);
}
return retval;
}
int imagetool_save_subimage(
const char *file_name,
ulong file_data,
ulong file_len)
{
int dfd;
dfd = open(file_name, O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
S_IRUSR | S_IWUSR);
if (dfd < 0) {
fprintf(stderr, "Can't open \"%s\": %s\n",
file_name, strerror(errno));
return -1;
}
if (write(dfd, (void *)file_data, file_len) != (ssize_t)file_len) {
fprintf(stderr, "Write error on \"%s\": %s\n",
file_name, strerror(errno));
close(dfd);
return -1;
}
close(dfd);
return 0;
}
int imagetool_get_filesize(struct image_tool_params *params, const char *fname)
{
struct stat sbuf;
int fd;
fd = open(fname, O_RDONLY | O_BINARY);
if (fd < 0) {
fprintf(stderr, "%s: Can't open %s: %s\n",
params->cmdname, fname, strerror(errno));
return -1;
}
if (fstat(fd, &sbuf) < 0) {
fprintf(stderr, "%s: Can't stat %s: %s\n",
params->cmdname, fname, strerror(errno));
close(fd);
return -1;
}
close(fd);
return sbuf.st_size;
}
time_t imagetool_get_source_date(
const char *cmdname,
time_t fallback)
{
char *source_date_epoch = getenv("SOURCE_DATE_EPOCH");
if (source_date_epoch == NULL)
return fallback;
time_t time = (time_t) strtol(source_date_epoch, NULL, 10);
if (gmtime(&time) == NULL) {
fprintf(stderr, "%s: SOURCE_DATE_EPOCH is not valid\n",
cmdname);
time = 0;
}
return time;
}