/* 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 = 'B' * 256 + 'Z', /* .xz signature: 0xfd, '7', 'z', 'X', 'Z', 0x00 */ /* More info at: http://tukaani.org/xz/xz-file-format.txt */ XZ_MAGIC1 = 0xfd * 256 + '7', XZ_MAGIC2 = (('z' * 256 + 'X') * 256 + 'Z') * 256 + 0, /* Different form: 32 bits, then 16 bits: */ XZ_MAGIC1a = ((0xfd * 256 + '7') * 256 + 'z') * 256 + 'X', XZ_MAGIC2a = 'Z' * 256 + 0, #else COMPRESS_MAGIC = 0x9d1f, GZIP_MAGIC = 0x8b1f, BZIP2_MAGIC = 'Z' * 256 + 'B', XZ_MAGIC1 = '7' * 256 + 0xfd, XZ_MAGIC2 = ((0 * 256 + 'Z') * 256 + 'X') * 256 + 'z', XZ_MAGIC1a = (('X' * 256 + 'z') * 256 + '7') * 256 + 0xfd, XZ_MAGIC2a = 0 * 256 + 'Z', #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; #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; extern archive_handle_t *init_handle(void) FAST_FUNC; extern char filter_accept_all(archive_handle_t *archive_handle) FAST_FUNC; extern char filter_accept_list(archive_handle_t *archive_handle) FAST_FUNC; extern char filter_accept_list_reassign(archive_handle_t *archive_handle) FAST_FUNC; extern char filter_accept_reject_list(archive_handle_t *archive_handle) FAST_FUNC; extern void unpack_ar_archive(archive_handle_t *ar_archive) FAST_FUNC; extern void data_skip(archive_handle_t *archive_handle) FAST_FUNC; extern void data_extract_all(archive_handle_t *archive_handle) FAST_FUNC; extern void data_extract_to_stdout(archive_handle_t *archive_handle) FAST_FUNC; extern void data_extract_to_command(archive_handle_t *archive_handle) FAST_FUNC; extern void header_skip(const file_header_t *file_header) FAST_FUNC; extern void header_list(const file_header_t *file_header) FAST_FUNC; extern void header_verbose_list(const file_header_t *file_header) FAST_FUNC; extern char get_header_ar(archive_handle_t *archive_handle) FAST_FUNC; extern char get_header_cpio(archive_handle_t *archive_handle) FAST_FUNC; extern char get_header_tar(archive_handle_t *archive_handle) FAST_FUNC; extern char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC; extern char get_header_tar_bz2(archive_handle_t *archive_handle) FAST_FUNC; extern char get_header_tar_lzma(archive_handle_t *archive_handle) FAST_FUNC; extern void seek_by_jump(int fd, off_t amount) FAST_FUNC; extern void seek_by_read(int fd, off_t amount) FAST_FUNC; extern void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC; extern const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC; extern 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