cpio.h

/*
 * Copyright (c) 2020 Institute of Parallel And Distributed Systems (IPADS), Shanghai Jiao Tong University (SJTU)
 * OS-Lab-2020 (i.e., ChCore) is licensed under the Mulan PSL v1.
 * You can use this software according to the terms and conditions of the Mulan PSL v1.
 * You may obtain a copy of Mulan PSL v1 at:
 *   http://license.coscl.org.cn/MulanPSL
 *   THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
 *   IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
 *   PURPOSE.
 *   See the Mulan PSL v1 for more details.
 */

#pragma once

#include <common/types.h>

/* Spec from https://man.openbsd.org/FreeBSD-12.0/cpio.5 */

struct cpio_newc_header {
	char c_magic[6];
	char c_ino[8];
	char c_mode[8];
	char c_uid[8];
	char c_gid[8];
	char c_nlink[8];
	char c_mtime[8];
	char c_filesize[8];
	char c_devmajor[8];
	char c_devminor[8];
	char c_rdevmajor[8];
	char c_rdevminor[8];
	char c_namesize[8];
	char c_check[8];
};

struct cpio_header {
	char c_magic[6];
	u64 c_ino;
	u64 c_mode;
	u64 c_uid;
	u64 c_gid;
	u64 c_nlink;
	u64 c_mtime;
	u64 c_filesize;
	u64 c_devmajor;
	u64 c_devminor;
	u64 c_rdevmajor;
	u64 c_rdevminor;
	u64 c_namesize;
	u64 c_check;
};

#define cpio_fatal(fmt, ...) do { \
	fprintf(stderr, "CPIO tool fatal error: " fmt, ##__VA_ARGS__); \
	exit(-1); \
} while (0)

#define cpio_fatal_e(fmt, ...) do { \
	fprintf(stderr, "CPIO tool fatal error (%s): " fmt, \
		strerror(errno), ##__VA_ARGS__); \
	exit(-1); \
} while (0)

#define ALIGN4_UP(x) ((((u64)x) & (~3llu)) + ((!!(((u64)x) & 3)) << 2))

struct cpio_file {
	struct cpio_header header;
	const char *name;
	const char *data;
	struct cpio_file *next;
};

struct {
	struct cpio_file head;
	struct cpio_file *tail;
} g_files;

void cpio_init_g_files(void);
int cpio_extract_file(const void *addr, const char *dirat);
void cpio_extract(const void *addr, const char *dirat);
void *cpio_extract_single(const void *addr, const char *target,
			  void *(*cpio_single_file_filler) (const void *start,
							    size_t size,
							    void *data),
			  void *data);