/lib/firmware/carl9170fw/tools/src/miniboot.c is in linux-firmware 1.173.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright 2010-2011 Christian Lamparter <chunkeey@googlemail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <error.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "carlfw.h"
#include "compiler.h"
static void mini_help(void)
{
fprintf(stderr, "Usage:\n");
fprintf(stderr, "\tminiboot ACTION FW-FILE [MB-FILE]\n");
fprintf(stderr, "\nDescription:\n");
fprintf(stderr, "\tFirmware concatenation utility.\n");
fprintf(stderr, "\nParameteres:\n");
fprintf(stderr, "\t'ACTION' = [a|d]\n");
fprintf(stderr, "\t | 'a' = Add miniboot firmware.\n");
fprintf(stderr, "\t * 'd' = remove miniboot firmware.\n");
fprintf(stderr, "\t'FW-FILE' = destination for the package.\n");
fprintf(stderr, "\t'MB-FILE' = extra firmware image.\n");
}
static int add_mini(struct carlfw *fw, const char *mini)
{
struct stat file_stat;
struct carl9170fw_otus_desc *otus_desc = NULL;
FILE *m = NULL;
char *buf = NULL;
size_t extra;
int err;
m = fopen(mini, "r");
if (m == NULL) {
fprintf(stderr, "Failed to open file %s (%d).\n",
mini, errno);
err = -errno;
goto fail;
}
err = fstat(fileno(m), &file_stat);
if (err) {
fprintf(stderr, "Failed to query file infos from "
"\"%s\" (%d).\n", mini, errno);
err = -errno;
goto fail;
}
extra = file_stat.st_size;
otus_desc = carlfw_find_desc(fw, (uint8_t *) OTUS_MAGIC,
sizeof(*otus_desc),
CARL9170FW_OTUS_DESC_CUR_VER);
if (!otus_desc) {
fprintf(stderr, "No OTUS descriptor found\n");
goto fail;
}
if (carl9170fw_supports(otus_desc->feature_set, CARL9170FW_MINIBOOT)) {
fprintf(stderr, "Firmware has already a miniboot image.\n");
goto fail;
}
otus_desc->feature_set |= cpu_to_le32(BIT(CARL9170FW_MINIBOOT));
otus_desc->miniboot_size = cpu_to_le16(extra);
buf = carlfw_mod_headroom(fw, extra);
if (IS_ERR_OR_NULL(buf)) {
fprintf(stderr, "Unable to add miniboot image.\n");
goto fail;
}
err = fread(buf, extra, 1, m);
if (err != 1) {
fprintf(stderr, "Unable to load miniboot.\n");
goto fail;
}
carlfw_store(fw);
fclose(m);
return 0;
fail:
if (m)
fclose(m);
return err;
}
static int del_mini(struct carlfw *fw)
{
struct carl9170fw_otus_desc *otus_desc = NULL;
void *buf;
int cut;
otus_desc = carlfw_find_desc(fw, (uint8_t *) OTUS_MAGIC,
sizeof(*otus_desc),
CARL9170FW_OTUS_DESC_CUR_VER);
if (!otus_desc) {
fprintf(stderr, "Firmware is not for USB devices.\n");
return -ENODATA;
}
if (!carl9170fw_supports(otus_desc->feature_set, CARL9170FW_MINIBOOT)) {
fprintf(stderr, "Firmware has no miniboot image.\n");
return -EINVAL;
}
cut = le16_to_cpu(otus_desc->miniboot_size);
buf = carlfw_mod_headroom(fw, -cut);
if (IS_ERR_OR_NULL(buf)) {
fprintf(stderr, "Unable to remove miniboot.\n");
return PTR_ERR(buf);
}
otus_desc->feature_set &= cpu_to_le32(~BIT(CARL9170FW_MINIBOOT));
otus_desc->miniboot_size = cpu_to_le16(0);
carlfw_store(fw);
return 0;
}
int main(int argc, char *args[])
{
struct carlfw *fw = NULL;
int err;
if (argc < 3 || argc > 4) {
err = -EINVAL;
goto err_param;
}
switch (args[1][0]) {
case 'a':
if (argc != 4)
goto err_param;
fw = carlfw_load(args[2]);
if (IS_ERR_OR_NULL(fw)) {
err = PTR_ERR(fw);
goto err_out;
}
err = add_mini(fw, args[3]);
break;
case 'd':
if (argc != 3)
goto err_param;
fw = carlfw_load(args[2]);
if (IS_ERR_OR_NULL(fw)) {
err = PTR_ERR(fw);
goto err_out;
}
err = del_mini(fw);
break;
default:
goto err_param;
break;
}
carlfw_release(fw);
return EXIT_SUCCESS;
err_out:
carlfw_release(fw);
fprintf(stderr, "miniboot action failed (%d).\n", err);
return EXIT_FAILURE;
err_param:
carlfw_release(fw);
mini_help();
return EXIT_FAILURE;
}
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