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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* format.h
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#ifndef TAR_FORMAT_H
#define TAR_FORMAT_H
#include "sqfs/predef.h"
typedef struct {
char name[100];
char mode[8];
char uid[8];
char gid[8];
char size[12];
char mtime[12];
char chksum[8];
char typeflag;
char linkname[100];
char magic[6];
char version[2];
char uname[32];
char gname[32];
char devmajor[8];
char devminor[8];
union {
struct {
char prefix[155];
char padding[12];
} posix;
struct {
char atime[12];
char ctime[12];
char offset[12];
char deprecated[4];
char unused;
struct {
char offset[12];
char numbytes[12];
} sparse[4];
char isextended;
char realsize[12];
char padding[17];
} gnu;
} tail;
} tar_header_t;
typedef struct {
struct {
char offset[12];
char numbytes[12];
} sparse[21];
char isextended;
char padding[7];
} gnu_sparse_t;
#define TAR_TYPE_FILE '0'
#define TAR_TYPE_LINK '1'
#define TAR_TYPE_SLINK '2'
#define TAR_TYPE_CHARDEV '3'
#define TAR_TYPE_BLOCKDEV '4'
#define TAR_TYPE_DIR '5'
#define TAR_TYPE_FIFO '6'
#define TAR_TYPE_GNU_SLINK 'K'
#define TAR_TYPE_GNU_PATH 'L'
#define TAR_TYPE_GNU_SPARSE 'S'
#define TAR_TYPE_PAX 'x'
#define TAR_TYPE_PAX_GLOBAL 'g'
#define TAR_MAGIC "ustar"
#define TAR_VERSION "00"
#define TAR_MAGIC_OLD "ustar "
#define TAR_VERSION_OLD " "
#define TAR_RECORD_SIZE (512)
/* artificially imposed implementation limits */
#define TAR_MAX_SYMLINK_LEN (65536)
#define TAR_MAX_PATH_LEN (65536)
#define TAR_MAX_PAX_LEN (65536)
#define TAR_MAX_SPARSE_ENT (65536)
#ifdef __cplusplus
extern "C" {
#endif
int read_octal(const char *str, int digits, sqfs_u64 *out);
int read_number(const char *str, int digits, sqfs_u64 *out);
void update_checksum(tar_header_t *hdr);
bool is_checksum_valid(const tar_header_t *hdr);
#ifdef __cplusplus
}
#endif
#endif /* TAR_FORMAT_H */
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