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/*
* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef VBOOT_REFERENCE_FUTILITY_H_
#define VBOOT_REFERENCE_FUTILITY_H_
#include <stdint.h>
#include "vboot_common.h"
#include "gbb_header.h"
/* This program */
#define MYNAME "futility"
/* Here's a structure to define the commands that futility implements. */
struct futil_cmd_t {
const char *const name;
int (*const handler) (int argc, char **argv);
const char *const shorthelp;
};
/*
* Macro to define a command.
*
* This defines the struct, then puts a pointer to it in a separate section.
* We'll have a linker script to gather the pointers up later, so we can refer
* to them without explictly declaring every function in a header somewhere.
*/
#define DECLARE_FUTIL_COMMAND(NAME, HANDLER, SHORTHELP) \
const struct futil_cmd_t __cmd_##NAME = { \
.name = #NAME, \
.handler = HANDLER, \
.shorthelp = SHORTHELP \
};
/* This is the list of pointers to all commands. */
extern const struct futil_cmd_t *const futil_cmds[];
/* Size of an array */
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(array) (sizeof(array)/sizeof(array[0]))
#endif
/* Test an important condition at compile time, not run time */
#ifndef BUILD_ASSERT
#define _BA1_(cond, line) \
extern int __build_assertion_ ## line[1 - 2*!(cond)] \
__attribute__ ((unused))
#define _BA0_(c, x) _BA1_(c, x)
#define BUILD_ASSERT(cond) _BA0_(cond, __LINE__)
#endif
/* Fatal internal stupidness */
#ifndef DIE
#define DIE do { \
fprintf(stderr, MYNAME ": internal error at %s:%d\n", \
__FILE__, __LINE__); \
exit(1); \
} while (0)
#endif
/* Returns true if this looks enough like a GBB header to proceed. */
int futil_looks_like_gbb(GoogleBinaryBlockHeader *gbb, uint32_t len);
/*
* Returns true if the gbb header is valid (and optionally updates *maxlen).
* This doesn't verify the contents, though.
*/
int futil_valid_gbb_header(GoogleBinaryBlockHeader *gbb, uint32_t len,
uint32_t *maxlen);
/* Copies a file or dies with an error message */
void copy_file_or_die(const char *infile, const char *outfile);
/* Wrapper for mmap/munmap. Returns 0 on success. Skips stupidly large files. */
int map_it(int fd, int writeable, void **buf, uint32_t *len);
int unmap_it(int fd, int writeable, void *buf, uint32_t len);
#endif /* VBOOT_REFERENCE_FUTILITY_H_ */
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