| /* 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 * (unsigned)(256 * (256 * 'z' + 'X') + 'Z') + 0, |
| /* Different form: 32 bits, then 16 bits: */ |
| /* (unsigned) cast suppresses "integer overflow in expression" warning */ |
| XZ_MAGIC1a = 256 * (unsigned)(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; |
| |
| /* List of symlink placeholders */ |
| llist_t *symlink_placeholders; |
| |
| /* 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_FEATURE_TAR_LONG_OPTIONS |
| unsigned tar__strip_components; |
| #endif |
| #define PAX_NEXT_FILE 0 |
| #define PAX_GLOBAL 1 |
| #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__sctx[2]; |
| # endif |
| #endif |
| #if ENABLE_CPIO || ENABLE_RPM2CPIO || ENABLE_RPM |
| uoff_t cpio__blocks; |
| struct bb_uidgid_t cpio__owner; |
| 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) |
| #define ARCHIVE_REMEMBER_NAMES (1 << 9) |
| #if ENABLE_RPM |
| #define ARCHIVE_REPLACE_VIA_RENAME (1 << 10) |
| #endif |
| |
| |
| /* 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]; |
| }; |
| |
| |
| extern const char cpio_TRAILER[]; |
| |
| |
| 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_xz(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; |
| char get_header_tar_xz(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; |
| |
| /* Meaning and direction (input/output) of the fields are transformer-specific */ |
| typedef struct transformer_state_t { |
| smallint signature_skipped; /* most often referenced member */ |
| |
| IF_DESKTOP(long long) int FAST_FUNC (*xformer)(struct transformer_state_t *xstate); |
| USE_FOR_NOMMU(const char *xformer_prog;) |
| |
| /* Source */ |
| int src_fd; |
| /* Output */ |
| int dst_fd; |
| size_t mem_output_size_max; /* if non-zero, decompress to RAM instead of fd */ |
| size_t mem_output_size; |
| char *mem_output_buf; |
| |
| off_t bytes_out; |
| off_t bytes_in; /* used in unzip code only: needs to know packed size */ |
| uint32_t crc32; |
| time_t mtime; /* gunzip code may set this on exit */ |
| } transformer_state_t; |
| |
| void init_transformer_state(transformer_state_t *xstate) FAST_FUNC; |
| ssize_t transformer_write(transformer_state_t *xstate, const void *buf, size_t bufsize) FAST_FUNC; |
| ssize_t xtransformer_write(transformer_state_t *xstate, const void *buf, size_t bufsize) FAST_FUNC; |
| int check_signature16(transformer_state_t *xstate, unsigned magic16) FAST_FUNC; |
| |
| IF_DESKTOP(long long) int inflate_unzip(transformer_state_t *xstate) FAST_FUNC; |
| IF_DESKTOP(long long) int unpack_Z_stream(transformer_state_t *xstate) FAST_FUNC; |
| IF_DESKTOP(long long) int unpack_gz_stream(transformer_state_t *xstate) FAST_FUNC; |
| IF_DESKTOP(long long) int unpack_bz2_stream(transformer_state_t *xstate) FAST_FUNC; |
| IF_DESKTOP(long long) int unpack_lzma_stream(transformer_state_t *xstate) FAST_FUNC; |
| IF_DESKTOP(long long) int unpack_xz_stream(transformer_state_t *xstate) 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)(transformer_state_t *xstate), |
| char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext), |
| const char *expected_ext |
| ) FAST_FUNC; |
| |
| void check_errors_in_children(int signo); |
| #if BB_MMU |
| void fork_transformer(int fd, |
| int signature_skipped, |
| IF_DESKTOP(long long) int FAST_FUNC (*transformer)(transformer_state_t *xstate) |
| ) FAST_FUNC; |
| #define fork_transformer_with_sig(fd, transformer, transform_prog) fork_transformer((fd), 0, (transformer)) |
| #define fork_transformer_with_no_sig(fd, transformer) fork_transformer((fd), 1, (transformer)) |
| #else |
| void fork_transformer(int fd, const char *transform_prog) FAST_FUNC; |
| #define fork_transformer_with_sig(fd, transformer, transform_prog) fork_transformer((fd), (transform_prog)) |
| /* fork_transformer_with_no_sig() does not exist on NOMMU */ |
| #endif |
| |
| |
| POP_SAVED_FUNCTION_VISIBILITY |
| |
| #endif |