bareboximd.c

// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2014 Sascha Hauer, Pengutronix

#include <stdio.h>
#include <sys/types.h>
#include <stdint.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <linux/err.h>
#include <linux/kernel.h>

#include "common.h"
#include "common.c"
#include "../include/image-metadata.h"

#define eprintf(args...) fprintf(stderr, ## args)

static void debug(const char *fmt, ...)
{
	va_list ap;

	if (!imd_command_verbose)
		return;

	va_start(ap, fmt);
	vfprintf(stderr, fmt, ap);
	va_end(ap);
}

int imd_command_setenv(const char *variable_name, const char *value)
{
	fprintf(stderr, "-s option ignored\n");

	return -EINVAL;
}

static inline void read_file_2_free(void *buf)
{
	/*
	 * Can't free() here because buffer might be mmapped. No need
	 * to do anything as we are exitting in a moment anyway.
	 */
}

static unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
{
	return strtoul(cp, endp, base);
}

static int imd_read_file(const char *filename, size_t *size, void **outbuf,
			 bool allow_mmap)
{
	void *buf = MAP_FAILED;
	int fd, ret;
	size_t fsize;

	fd = open(filename, O_RDONLY);
	if (fd < 0) {
		fprintf(stderr, "Cannot open %s: %s\n", filename, strerror(errno));
		return -errno;
	}

	fsize = lseek(fd, 0, SEEK_END);
	if (fsize == -1) {
		fprintf(stderr, "Cannot get size %s: %s\n", filename, strerror(errno));
		ret = -errno;
		goto close;
	}

	if (allow_mmap)
		buf = mmap(NULL, fsize, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);

	if (buf == MAP_FAILED) {
		close(fd);
		return read_file_2(filename, size, outbuf, 0x100000);
	}

	*outbuf = buf;
	*size = fsize;

	return 0;
close:
	close(fd);
	return ret;
}

#include "../include/xfuncs.h"
#include "../crypto/crc32.c"
#include "../common/imd.c"

static void usage(const char *prgname)
{
	printf(
"Extract metadata from a barebox image\n"
"\n"
"Usage: %s [OPTIONS] FILE\n"
"Options:\n"
"-t <type>    only show information of <type>\n"
"-n <no>      for tags with multiple strings only show string <no>\n"
"-v           Be verbose\n"
"-V           Verify checksum of FILE\n"
"-c           Create checksum for FILE and write it to the crc32 tag\n"
"\n"
"Without options all information available is printed. Valid types are:\n"
"release, build, model, of_compatible\n",
	prgname);
}

int main(int argc, char *argv[])
{
	int ret;

	ret = imd_command(argc, argv);
	if (ret == -ENOSYS) {
		usage(argv[0]);
		exit(1);
	}

	if (ret)
		fprintf(stderr, "%s\n", strerror(-ret));

	return ret ? 1 : 0;
}