mirror of
https://github.com/sheumann/hush.git
synced 2024-12-27 01:32:08 +00:00
9180c6045e
function old new delta writeTarHeader 841 979 +138 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
242 lines
8.5 KiB
C
242 lines
8.5 KiB
C
/* vi: set sw=4 ts=4: */
|
|
#ifndef UNARCHIVE_H
|
|
#define UNARCHIVE_H 1
|
|
|
|
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
|
|
|
|
enum {
|
|
#if BB_BIG_ENDIAN
|
|
COMPRESS_MAGIC = 0x1f9d,
|
|
GZIP_MAGIC = 0x1f8b,
|
|
BZIP2_MAGIC = 256 * 'B' + 'Z',
|
|
/* .xz signature: 0xfd, '7', 'z', 'X', 'Z', 0x00 */
|
|
/* More info at: http://tukaani.org/xz/xz-file-format.txt */
|
|
XZ_MAGIC1 = 256 * 0xfd + '7',
|
|
XZ_MAGIC2 = 256 * (256 * (256 * 'z' + 'X') + 'Z') + 0,
|
|
/* Different form: 32 bits, then 16 bits: */
|
|
XZ_MAGIC1a = 256 * (256 * (256 * 0xfd + '7') + 'z') + 'X',
|
|
XZ_MAGIC2a = 256 * 'Z' + 0,
|
|
#else
|
|
COMPRESS_MAGIC = 0x9d1f,
|
|
GZIP_MAGIC = 0x8b1f,
|
|
BZIP2_MAGIC = 'B' + 'Z' * 256,
|
|
XZ_MAGIC1 = 0xfd + '7' * 256,
|
|
XZ_MAGIC2 = 'z' + ('X' + ('Z' + 0 * 256) * 256) * 256,
|
|
XZ_MAGIC1a = 0xfd + ('7' + ('z' + 'X' * 256) * 256) * 256,
|
|
XZ_MAGIC2a = 'Z' + 0 * 256,
|
|
#endif
|
|
};
|
|
|
|
typedef struct file_header_t {
|
|
char *name;
|
|
char *link_target;
|
|
#if ENABLE_FEATURE_TAR_UNAME_GNAME
|
|
char *tar__uname;
|
|
char *tar__gname;
|
|
#endif
|
|
off_t size;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
mode_t mode;
|
|
time_t mtime;
|
|
dev_t device;
|
|
} file_header_t;
|
|
|
|
struct hardlinks_t;
|
|
|
|
typedef struct archive_handle_t {
|
|
/* Flags. 1st since it is most used member */
|
|
unsigned ah_flags;
|
|
|
|
/* The raw stream as read from disk or stdin */
|
|
int src_fd;
|
|
|
|
/* Define if the header and data component should be processed */
|
|
char FAST_FUNC (*filter)(struct archive_handle_t *);
|
|
/* List of files that have been accepted */
|
|
llist_t *accept;
|
|
/* List of files that have been rejected */
|
|
llist_t *reject;
|
|
/* List of files that have successfully been worked on */
|
|
llist_t *passed;
|
|
|
|
/* Currently processed file's header */
|
|
file_header_t *file_header;
|
|
|
|
/* Process the header component, e.g. tar -t */
|
|
void FAST_FUNC (*action_header)(const file_header_t *);
|
|
|
|
/* Process the data component, e.g. extract to filesystem */
|
|
void FAST_FUNC (*action_data)(struct archive_handle_t *);
|
|
|
|
/* Function that skips data */
|
|
void FAST_FUNC (*seek)(int fd, off_t amount);
|
|
|
|
/* Count processed bytes */
|
|
off_t offset;
|
|
|
|
/* Archiver specific. Can make it a union if it ever gets big */
|
|
#if ENABLE_TAR || ENABLE_DPKG || ENABLE_DPKG_DEB
|
|
smallint tar__end;
|
|
# if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
|
|
char* tar__longname;
|
|
char* tar__linkname;
|
|
# endif
|
|
#if ENABLE_FEATURE_TAR_TO_COMMAND
|
|
char* tar__to_command;
|
|
const char* tar__to_command_shell;
|
|
#endif
|
|
# if ENABLE_FEATURE_TAR_SELINUX
|
|
char* tar__global_sctx;
|
|
char* tar__next_file_sctx;
|
|
# endif
|
|
#endif
|
|
#if ENABLE_CPIO || ENABLE_RPM2CPIO || ENABLE_RPM
|
|
uoff_t cpio__blocks;
|
|
struct hardlinks_t *cpio__hardlinks_to_create;
|
|
struct hardlinks_t *cpio__created_hardlinks;
|
|
#endif
|
|
#if ENABLE_DPKG || ENABLE_DPKG_DEB
|
|
/* Temporary storage */
|
|
char *dpkg__buffer;
|
|
/* How to process any sub archive, e.g. get_header_tar_gz */
|
|
char FAST_FUNC (*dpkg__action_data_subarchive)(struct archive_handle_t *);
|
|
/* Contains the handle to a sub archive */
|
|
struct archive_handle_t *dpkg__sub_archive;
|
|
#endif
|
|
#if ENABLE_FEATURE_AR_CREATE
|
|
const char *ar__name;
|
|
struct archive_handle_t *ar__out;
|
|
#endif
|
|
} archive_handle_t;
|
|
/* bits in ah_flags */
|
|
#define ARCHIVE_RESTORE_DATE (1 << 0)
|
|
#define ARCHIVE_CREATE_LEADING_DIRS (1 << 1)
|
|
#define ARCHIVE_UNLINK_OLD (1 << 2)
|
|
#define ARCHIVE_EXTRACT_QUIET (1 << 3)
|
|
#define ARCHIVE_EXTRACT_NEWER (1 << 4)
|
|
#define ARCHIVE_DONT_RESTORE_OWNER (1 << 5)
|
|
#define ARCHIVE_DONT_RESTORE_PERM (1 << 6)
|
|
#define ARCHIVE_NUMERIC_OWNER (1 << 7)
|
|
#define ARCHIVE_O_TRUNC (1 << 8)
|
|
|
|
|
|
/* POSIX tar Header Block, from POSIX 1003.1-1990 */
|
|
#define TAR_BLOCK_SIZE 512
|
|
#define NAME_SIZE 100
|
|
#define NAME_SIZE_STR "100"
|
|
typedef struct tar_header_t { /* byte offset */
|
|
char name[NAME_SIZE]; /* 0-99 */
|
|
char mode[8]; /* 100-107 */
|
|
char uid[8]; /* 108-115 */
|
|
char gid[8]; /* 116-123 */
|
|
char size[12]; /* 124-135 */
|
|
char mtime[12]; /* 136-147 */
|
|
char chksum[8]; /* 148-155 */
|
|
char typeflag; /* 156-156 */
|
|
char linkname[NAME_SIZE]; /* 157-256 */
|
|
/* POSIX: "ustar" NUL "00" */
|
|
/* GNU tar: "ustar " NUL */
|
|
/* Normally it's defined as magic[6] followed by
|
|
* version[2], but we put them together to save code.
|
|
*/
|
|
char magic[8]; /* 257-264 */
|
|
char uname[32]; /* 265-296 */
|
|
char gname[32]; /* 297-328 */
|
|
char devmajor[8]; /* 329-336 */
|
|
char devminor[8]; /* 337-344 */
|
|
char prefix[155]; /* 345-499 */
|
|
char padding[12]; /* 500-512 (pad to exactly TAR_BLOCK_SIZE) */
|
|
} tar_header_t;
|
|
struct BUG_tar_header {
|
|
char c[sizeof(tar_header_t) == TAR_BLOCK_SIZE ? 1 : -1];
|
|
};
|
|
|
|
|
|
|
|
/* Info struct unpackers can fill out to inform users of thing like
|
|
* timestamps of unpacked files */
|
|
typedef struct unpack_info_t {
|
|
time_t mtime;
|
|
} unpack_info_t;
|
|
|
|
archive_handle_t *init_handle(void) FAST_FUNC;
|
|
|
|
char filter_accept_all(archive_handle_t *archive_handle) FAST_FUNC;
|
|
char filter_accept_list(archive_handle_t *archive_handle) FAST_FUNC;
|
|
char filter_accept_list_reassign(archive_handle_t *archive_handle) FAST_FUNC;
|
|
char filter_accept_reject_list(archive_handle_t *archive_handle) FAST_FUNC;
|
|
|
|
void unpack_ar_archive(archive_handle_t *ar_archive) FAST_FUNC;
|
|
|
|
void data_skip(archive_handle_t *archive_handle) FAST_FUNC;
|
|
void data_extract_all(archive_handle_t *archive_handle) FAST_FUNC;
|
|
void data_extract_to_stdout(archive_handle_t *archive_handle) FAST_FUNC;
|
|
void data_extract_to_command(archive_handle_t *archive_handle) FAST_FUNC;
|
|
|
|
void header_skip(const file_header_t *file_header) FAST_FUNC;
|
|
void header_list(const file_header_t *file_header) FAST_FUNC;
|
|
void header_verbose_list(const file_header_t *file_header) FAST_FUNC;
|
|
|
|
char get_header_ar(archive_handle_t *archive_handle) FAST_FUNC;
|
|
char get_header_cpio(archive_handle_t *archive_handle) FAST_FUNC;
|
|
char get_header_tar(archive_handle_t *archive_handle) FAST_FUNC;
|
|
char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC;
|
|
char get_header_tar_bz2(archive_handle_t *archive_handle) FAST_FUNC;
|
|
char get_header_tar_lzma(archive_handle_t *archive_handle) FAST_FUNC;
|
|
|
|
void seek_by_jump(int fd, off_t amount) FAST_FUNC;
|
|
void seek_by_read(int fd, off_t amount) FAST_FUNC;
|
|
|
|
const char *strip_unsafe_prefix(const char *str) FAST_FUNC;
|
|
|
|
void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC;
|
|
const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC;
|
|
const llist_t *find_list_entry2(const llist_t *list, const char *filename) FAST_FUNC;
|
|
|
|
/* A bit of bunzip2 internals are exposed for compressed help support: */
|
|
typedef struct bunzip_data bunzip_data;
|
|
int start_bunzip(bunzip_data **bdp, int in_fd, const void *inbuf, int len) FAST_FUNC;
|
|
/* NB: read_bunzip returns < 0 on error, or the number of *unfilled* bytes
|
|
* in outbuf. IOW: on EOF returns len ("all bytes are not filled"), not 0: */
|
|
int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC;
|
|
void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;
|
|
|
|
typedef struct inflate_unzip_result {
|
|
off_t bytes_out;
|
|
uint32_t crc;
|
|
} inflate_unzip_result;
|
|
|
|
IF_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, off_t compr_size, int src_fd, int dst_fd) FAST_FUNC;
|
|
/* xz unpacker takes .xz stream from offset 6 */
|
|
IF_DESKTOP(long long) int unpack_xz_stream(int src_fd, int dst_fd) FAST_FUNC;
|
|
/* lzma unpacker takes .lzma stream from offset 0 */
|
|
IF_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd) FAST_FUNC;
|
|
/* the rest wants 2 first bytes already skipped by the caller */
|
|
IF_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd) FAST_FUNC;
|
|
IF_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd) FAST_FUNC;
|
|
IF_DESKTOP(long long) int unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info) FAST_FUNC;
|
|
IF_DESKTOP(long long) int unpack_Z_stream(int src_fd, int dst_fd) FAST_FUNC;
|
|
/* wrapper which checks first two bytes to be "BZ" */
|
|
IF_DESKTOP(long long) int unpack_bz2_stream_prime(int src_fd, int dst_fd) FAST_FUNC;
|
|
|
|
char* append_ext(char *filename, const char *expected_ext) FAST_FUNC;
|
|
int bbunpack(char **argv,
|
|
IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(unpack_info_t *info),
|
|
char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
|
|
const char *expected_ext
|
|
) FAST_FUNC;
|
|
|
|
#if BB_MMU
|
|
void open_transformer(int fd,
|
|
IF_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd)) FAST_FUNC;
|
|
#define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transformer)
|
|
#else
|
|
void open_transformer(int src_fd, const char *transform_prog) FAST_FUNC;
|
|
#define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transform_prog)
|
|
#endif
|
|
|
|
POP_SAVED_FUNCTION_VISIBILITY
|
|
|
|
#endif
|