1 /* vi: set sw=4 ts=4: */
5 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
9 COMPRESS_MAGIC = 0x1f9d,
11 BZIP2_MAGIC = 'B' * 256 + 'Z',
12 XZ_MAGIC1 = 0xfd * 256 + '7',
13 XZ_MAGIC2 = (('z' * 256 + 'X') * 256 + 'Z') * 256 + 0,
14 /* Different form: 32 bits, then 16 bits: */
15 XZ_MAGIC1a = ((0xfd * 256 + '7') * 256 + 'z') * 256 + 'X',
16 XZ_MAGIC2a = 'Z' * 256 + 0,
18 COMPRESS_MAGIC = 0x9d1f,
20 BZIP2_MAGIC = 'Z' * 256 + 'B',
21 XZ_MAGIC1 = '7' * 256 + 0xfd,
22 XZ_MAGIC2 = ((0 * 256 + 'Z') * 256 + 'X') * 256 + 'z',
23 XZ_MAGIC1a = (('X' * 256 + 'z') * 256 + '7') * 256 + 0xfd,
24 XZ_MAGIC2a = 0 * 256 + 'Z',
28 typedef struct file_header_t {
31 #if ENABLE_FEATURE_TAR_UNAME_GNAME
45 typedef struct archive_handle_t {
46 /* Flags. 1st since it is most used member */
49 /* The raw stream as read from disk or stdin */
52 /* Define if the header and data component should be processed */
53 char FAST_FUNC (*filter)(struct archive_handle_t *);
54 /* List of files that have been accepted */
56 /* List of files that have been rejected */
58 /* List of files that have successfully been worked on */
61 /* Currently processed file's header */
62 file_header_t *file_header;
64 /* Process the header component, e.g. tar -t */
65 void FAST_FUNC (*action_header)(const file_header_t *);
67 /* Process the data component, e.g. extract to filesystem */
68 void FAST_FUNC (*action_data)(struct archive_handle_t *);
70 /* Function that skips data */
71 void FAST_FUNC (*seek)(int fd, off_t amount);
73 /* Count processed bytes */
76 /* Archiver specific. Can make it a union if it ever gets big */
77 #if ENABLE_TAR || ENABLE_DPKG || ENABLE_DPKG_DEB
79 # if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
83 #if ENABLE_FEATURE_TAR_TO_COMMAND
84 char* tar__to_command;
86 # if ENABLE_FEATURE_TAR_SELINUX
87 char* tar__global_sctx;
88 char* tar__next_file_sctx;
91 #if ENABLE_CPIO || ENABLE_RPM2CPIO || ENABLE_RPM
93 struct hardlinks_t *cpio__hardlinks_to_create;
94 struct hardlinks_t *cpio__created_hardlinks;
96 #if ENABLE_DPKG || ENABLE_DPKG_DEB
97 /* Temporary storage */
99 /* How to process any sub archive, e.g. get_header_tar_gz */
100 char FAST_FUNC (*dpkg__action_data_subarchive)(struct archive_handle_t *);
101 /* Contains the handle to a sub archive */
102 struct archive_handle_t *dpkg__sub_archive;
104 #if ENABLE_FEATURE_AR_CREATE
105 const char *ar__name;
106 struct archive_handle_t *ar__out;
109 /* bits in ah_flags */
110 #define ARCHIVE_RESTORE_DATE (1 << 0)
111 #define ARCHIVE_CREATE_LEADING_DIRS (1 << 1)
112 #define ARCHIVE_UNLINK_OLD (1 << 2)
113 #define ARCHIVE_EXTRACT_QUIET (1 << 3)
114 #define ARCHIVE_EXTRACT_NEWER (1 << 4)
115 #define ARCHIVE_DONT_RESTORE_OWNER (1 << 5)
116 #define ARCHIVE_DONT_RESTORE_PERM (1 << 6)
117 #define ARCHIVE_NUMERIC_OWNER (1 << 7)
118 #define ARCHIVE_O_TRUNC (1 << 8)
121 /* POSIX tar Header Block, from POSIX 1003.1-1990 */
122 #define TAR_BLOCK_SIZE 512
123 #define NAME_SIZE 100
124 #define NAME_SIZE_STR "100"
125 typedef struct tar_header_t { /* byte offset */
126 char name[NAME_SIZE]; /* 0-99 */
127 char mode[8]; /* 100-107 */
128 char uid[8]; /* 108-115 */
129 char gid[8]; /* 116-123 */
130 char size[12]; /* 124-135 */
131 char mtime[12]; /* 136-147 */
132 char chksum[8]; /* 148-155 */
133 char typeflag; /* 156-156 */
134 char linkname[NAME_SIZE]; /* 157-256 */
135 /* POSIX: "ustar" NUL "00" */
136 /* GNU tar: "ustar " NUL */
137 /* Normally it's defined as magic[6] followed by
138 * version[2], but we put them together to save code.
140 char magic[8]; /* 257-264 */
141 char uname[32]; /* 265-296 */
142 char gname[32]; /* 297-328 */
143 char devmajor[8]; /* 329-336 */
144 char devminor[8]; /* 337-344 */
145 char prefix[155]; /* 345-499 */
146 char padding[12]; /* 500-512 (pad to exactly TAR_BLOCK_SIZE) */
148 struct BUG_tar_header {
149 char c[sizeof(tar_header_t) == TAR_BLOCK_SIZE ? 1 : -1];
154 /* Info struct unpackers can fill out to inform users of thing like
155 * timestamps of unpacked files */
156 typedef struct unpack_info_t {
160 extern archive_handle_t *init_handle(void) FAST_FUNC;
162 extern char filter_accept_all(archive_handle_t *archive_handle) FAST_FUNC;
163 extern char filter_accept_list(archive_handle_t *archive_handle) FAST_FUNC;
164 extern char filter_accept_list_reassign(archive_handle_t *archive_handle) FAST_FUNC;
165 extern char filter_accept_reject_list(archive_handle_t *archive_handle) FAST_FUNC;
167 extern void unpack_ar_archive(archive_handle_t *ar_archive) FAST_FUNC;
169 extern void data_skip(archive_handle_t *archive_handle) FAST_FUNC;
170 extern void data_extract_all(archive_handle_t *archive_handle) FAST_FUNC;
171 extern void data_extract_to_stdout(archive_handle_t *archive_handle) FAST_FUNC;
172 extern void data_extract_to_command(archive_handle_t *archive_handle) FAST_FUNC;
174 extern void header_skip(const file_header_t *file_header) FAST_FUNC;
175 extern void header_list(const file_header_t *file_header) FAST_FUNC;
176 extern void header_verbose_list(const file_header_t *file_header) FAST_FUNC;
178 extern char get_header_ar(archive_handle_t *archive_handle) FAST_FUNC;
179 extern char get_header_cpio(archive_handle_t *archive_handle) FAST_FUNC;
180 extern char get_header_tar(archive_handle_t *archive_handle) FAST_FUNC;
181 extern char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC;
182 extern char get_header_tar_bz2(archive_handle_t *archive_handle) FAST_FUNC;
183 extern char get_header_tar_lzma(archive_handle_t *archive_handle) FAST_FUNC;
185 extern void seek_by_jump(int fd, off_t amount) FAST_FUNC;
186 extern void seek_by_read(int fd, off_t amount) FAST_FUNC;
188 extern void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC;
189 extern const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC;
190 extern const llist_t *find_list_entry2(const llist_t *list, const char *filename) FAST_FUNC;
192 /* A bit of bunzip2 internals are exposed for compressed help support: */
193 typedef struct bunzip_data bunzip_data;
194 int start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf, int len) FAST_FUNC;
195 int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC;
196 void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;
198 typedef struct inflate_unzip_result {
201 } inflate_unzip_result;
203 IF_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, off_t compr_size, int src_fd, int dst_fd) FAST_FUNC;
204 /* xz unpacker takes .xz stream from offset 6 */
205 IF_DESKTOP(long long) int unpack_xz_stream(int src_fd, int dst_fd) FAST_FUNC;
206 /* lzma unpacker takes .lzma stream from offset 0 */
207 IF_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd) FAST_FUNC;
208 /* the rest wants 2 first bytes already skipped by the caller */
209 IF_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd) FAST_FUNC;
210 IF_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd) FAST_FUNC;
211 IF_DESKTOP(long long) int unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info) FAST_FUNC;
212 IF_DESKTOP(long long) int unpack_Z_stream(int src_fd, int dst_fd) FAST_FUNC;
213 /* wrapper which checks first two bytes to be "BZ" */
214 IF_DESKTOP(long long) int unpack_bz2_stream_prime(int src_fd, int dst_fd) FAST_FUNC;
216 char* append_ext(char *filename, const char *expected_ext) FAST_FUNC;
217 int bbunpack(char **argv,
218 IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(unpack_info_t *info),
219 char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
220 const char *expected_ext
224 void open_transformer(int fd,
225 IF_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd)) FAST_FUNC;
226 #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transformer)
228 void open_transformer(int src_fd, const char *transform_prog) FAST_FUNC;
229 #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transform_prog)
232 POP_SAVED_FUNCTION_VISIBILITY