/* SPDX-License-Identifier: GPL-3.0-or-later */
#ifndef TAR_H
#define TAR_H

#include "fstree.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];
	char prefix[155];
	char padding[12];
} tar_header_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_PAX 'x'

#define TAR_MAGIC "ustar"
#define TAR_VERSION "00"

/*
  Returns < 0 on failure, > 0 if cannot encode, 0 on success.
  Prints error/warning messages to stderr.
*/
int write_tar_header(int fd, const fstree_t *fs, const tree_node_t *n,
		     const char *name);

#endif /* TAR_H */