dumpimage.c

/*
 * dumpimage -- Tool to extract sub images from FIT image.
 *
 * Copyright (C) 2021 IOPSYS Software Solutions AB. All rights reserved.
 *
 * Author: jonas.hoglund@iopsys.eu
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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 St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <stdbool.h>
#include <sys/stat.h>

#include <libfdt.h>
#include <fdt.h>

#define PRINTF(i, j)    __attribute__((format (printf, i, j)))
#define NORETURN        __attribute__((noreturn))

static inline void NORETURN PRINTF(1, 2) die(const char *str, ...)
{
    va_list ap;

    va_start(ap, str);
    fprintf(stderr, "ERROR: ");
    vfprintf(stderr, str, ap);
    va_end(ap);
    exit(1);
}

int main(int argc, char *argv[])
{
	const char *file;
	FILE *f;
	struct stat st;
	int size, ret;
	char *buf;


	if (argc < 2)
		die("missing filename.\n");

	file = argv[1];

	f = fopen(file, "r");
	if (!f)
		die("could not open file\n");

	stat(file, &st);
	size = st.st_size;

	buf = malloc(size);
	if (!buf)
		die("Could not allocate buffer.\n");

	ret = fread(buf, 1, size, f);
	if (ret < size)
		die("Could not read file.\n");

	free(buf);
	fclose(f);
}