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/*
* libdpkg - Debian packaging suite library routines
* tarfn.h - tar archive extraction functions
*
* Copyright © 1995 Bruce Perens
* Copyright © 2009-2014, 2017 Guillem Jover <guillem@debian.org>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LIBDPKG_TARFN_H
#define LIBDPKG_TARFN_H
#include <sys/types.h>
#include <stdint.h>
#include <dpkg/error.h>
#include <dpkg/file.h>
DPKG_BEGIN_DECLS
/**
* @defgroup tar Tar archive handling
* @ingroup dpkg-public
* @{
*/
#define TARBLKSZ 512
enum tar_format {
TAR_FORMAT_UNKNOWN,
TAR_FORMAT_OLD,
TAR_FORMAT_GNU,
TAR_FORMAT_USTAR,
TAR_FORMAT_PAX,
};
enum tar_filetype {
/** For compatibility with decades-old bug. */
TAR_FILETYPE_FILE0 = '\0',
TAR_FILETYPE_FILE = '0',
TAR_FILETYPE_HARDLINK = '1',
TAR_FILETYPE_SYMLINK = '2',
TAR_FILETYPE_CHARDEV = '3',
TAR_FILETYPE_BLOCKDEV = '4',
TAR_FILETYPE_DIR = '5',
TAR_FILETYPE_FIFO = '6',
TAR_FILETYPE_CONTIG = '7',
TAR_FILETYPE_GNU_LONGLINK = 'K',
TAR_FILETYPE_GNU_LONGNAME = 'L',
TAR_FILETYPE_GNU_VOLUME = 'V',
TAR_FILETYPE_GNU_MULTIVOL = 'M',
TAR_FILETYPE_GNU_DUMPDIR = 'D',
TAR_FILETYPE_GNU_SPARSE = 'S',
TAR_FILETYPE_PAX_GLOBAL = 'g',
TAR_FILETYPE_PAX_EXTENDED = 'x',
TAR_FILETYPE_SOLARIS_EXTENDED = 'X',
TAR_FILETYPE_SOLARIS_ACL = 'A',
};
struct tar_entry {
/** Tar entry format. */
enum tar_format format;
/** File type. */
enum tar_filetype type;
/** File name. */
char *name;
/** Symlink or hardlink name. */
char *linkname;
/** File size. */
off_t size;
/** Last-modified time. */
intmax_t mtime;
/** Special device for mknod(). */
dev_t dev;
struct file_stat stat;
};
struct tar_archive;
typedef int tar_read_func(struct tar_archive *tar, char *buffer, int length);
typedef int tar_make_func(struct tar_archive *tar, struct tar_entry *h);
struct tar_operations {
tar_read_func *read;
tar_make_func *extract_file;
tar_make_func *link;
tar_make_func *symlink;
tar_make_func *mkdir;
tar_make_func *mknod;
};
struct tar_archive {
/* Global tar archive error. */
struct dpkg_error err;
/** Tar archive format. */
enum tar_format format;
/* Operation functions and context. */
const struct tar_operations *ops;
void *ctx;
};
uintmax_t
tar_atoul(const char *s, size_t size, uintmax_t max);
intmax_t
tar_atosl(const char *s, size_t size, intmax_t min, intmax_t max);
void
tar_entry_update_from_system(struct tar_entry *te);
int
tar_extractor(struct tar_archive *tar);
/** @} */
DPKG_END_DECLS
#endif
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