1 /* vi: set sw=4 ts=4: */
5 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
9 COMPRESS_MAGIC = 0x1f9d,
11 BZIP2_MAGIC = 256 * 'B' + 'Z',
12 /* .xz signature: 0xfd, '7', 'z', 'X', 'Z', 0x00 */
13 /* More info at: http://tukaani.org/xz/xz-file-format.txt */
14 XZ_MAGIC1 = 256 * 0xfd + '7',
15 XZ_MAGIC2 = 256 * (unsigned)(256 * (256 * 'z' + 'X') + 'Z') + 0,
16 /* Different form: 32 bits, then 16 bits: */
17 /* (unsigned) cast suppresses "integer overflow in expression" warning */
18 XZ_MAGIC1a = 256 * (unsigned)(256 * (256 * 0xfd + '7') + 'z') + 'X',
19 XZ_MAGIC2a = 256 * 'Z' + 0,
21 COMPRESS_MAGIC = 0x9d1f,
23 BZIP2_MAGIC = 'B' + 'Z' * 256,
24 XZ_MAGIC1 = 0xfd + '7' * 256,
25 XZ_MAGIC2 = 'z' + ('X' + ('Z' + 0 * 256) * 256) * 256,
26 XZ_MAGIC1a = 0xfd + ('7' + ('z' + 'X' * 256) * 256) * 256,
27 XZ_MAGIC2a = 'Z' + 0 * 256,
31 typedef struct file_header_t {
34 #if ENABLE_FEATURE_TAR_UNAME_GNAME
48 typedef struct archive_handle_t {
49 /* Flags. 1st since it is most used member */
52 /* The raw stream as read from disk or stdin */
55 /* Define if the header and data component should be processed */
56 char FAST_FUNC (*filter)(struct archive_handle_t *);
57 /* List of files that have been accepted */
59 /* List of files that have been rejected */
61 /* List of files that have successfully been worked on */
64 /* Currently processed file's header */
65 file_header_t *file_header;
67 /* Process the header component, e.g. tar -t */
68 void FAST_FUNC (*action_header)(const file_header_t *);
70 /* Process the data component, e.g. extract to filesystem */
71 void FAST_FUNC (*action_data)(struct archive_handle_t *);
73 /* Function that skips data */
74 void FAST_FUNC (*seek)(int fd, off_t amount);
76 /* Count processed bytes */
79 /* Archiver specific. Can make it a union if it ever gets big */
80 #define PAX_NEXT_FILE 0
82 #if ENABLE_TAR || ENABLE_DPKG || ENABLE_DPKG_DEB
84 # if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
88 # if ENABLE_FEATURE_TAR_TO_COMMAND
89 char* tar__to_command;
90 const char* tar__to_command_shell;
92 # if ENABLE_FEATURE_TAR_SELINUX
96 #if ENABLE_CPIO || ENABLE_RPM2CPIO || ENABLE_RPM
98 struct hardlinks_t *cpio__hardlinks_to_create;
99 struct hardlinks_t *cpio__created_hardlinks;
101 #if ENABLE_DPKG || ENABLE_DPKG_DEB
102 /* Temporary storage */
104 /* How to process any sub archive, e.g. get_header_tar_gz */
105 char FAST_FUNC (*dpkg__action_data_subarchive)(struct archive_handle_t *);
106 /* Contains the handle to a sub archive */
107 struct archive_handle_t *dpkg__sub_archive;
109 #if ENABLE_FEATURE_AR_CREATE
110 const char *ar__name;
111 struct archive_handle_t *ar__out;
114 /* bits in ah_flags */
115 #define ARCHIVE_RESTORE_DATE (1 << 0)
116 #define ARCHIVE_CREATE_LEADING_DIRS (1 << 1)
117 #define ARCHIVE_UNLINK_OLD (1 << 2)
118 #define ARCHIVE_EXTRACT_QUIET (1 << 3)
119 #define ARCHIVE_EXTRACT_NEWER (1 << 4)
120 #define ARCHIVE_DONT_RESTORE_OWNER (1 << 5)
121 #define ARCHIVE_DONT_RESTORE_PERM (1 << 6)
122 #define ARCHIVE_NUMERIC_OWNER (1 << 7)
123 #define ARCHIVE_O_TRUNC (1 << 8)
124 #define ARCHIVE_REMEMBER_NAMES (1 << 9)
126 #define ARCHIVE_REPLACE_VIA_RENAME (1 << 10)
130 /* POSIX tar Header Block, from POSIX 1003.1-1990 */
131 #define TAR_BLOCK_SIZE 512
132 #define NAME_SIZE 100
133 #define NAME_SIZE_STR "100"
134 typedef struct tar_header_t { /* byte offset */
135 char name[NAME_SIZE]; /* 0-99 */
136 char mode[8]; /* 100-107 */
137 char uid[8]; /* 108-115 */
138 char gid[8]; /* 116-123 */
139 char size[12]; /* 124-135 */
140 char mtime[12]; /* 136-147 */
141 char chksum[8]; /* 148-155 */
142 char typeflag; /* 156-156 */
143 char linkname[NAME_SIZE]; /* 157-256 */
144 /* POSIX: "ustar" NUL "00" */
145 /* GNU tar: "ustar " NUL */
146 /* Normally it's defined as magic[6] followed by
147 * version[2], but we put them together to save code.
149 char magic[8]; /* 257-264 */
150 char uname[32]; /* 265-296 */
151 char gname[32]; /* 297-328 */
152 char devmajor[8]; /* 329-336 */
153 char devminor[8]; /* 337-344 */
154 char prefix[155]; /* 345-499 */
155 char padding[12]; /* 500-512 (pad to exactly TAR_BLOCK_SIZE) */
157 struct BUG_tar_header {
158 char c[sizeof(tar_header_t) == TAR_BLOCK_SIZE ? 1 : -1];
163 archive_handle_t *init_handle(void) FAST_FUNC;
165 char filter_accept_all(archive_handle_t *archive_handle) FAST_FUNC;
166 char filter_accept_list(archive_handle_t *archive_handle) FAST_FUNC;
167 char filter_accept_list_reassign(archive_handle_t *archive_handle) FAST_FUNC;
168 char filter_accept_reject_list(archive_handle_t *archive_handle) FAST_FUNC;
170 void unpack_ar_archive(archive_handle_t *ar_archive) FAST_FUNC;
172 void data_skip(archive_handle_t *archive_handle) FAST_FUNC;
173 void data_extract_all(archive_handle_t *archive_handle) FAST_FUNC;
174 void data_extract_to_stdout(archive_handle_t *archive_handle) FAST_FUNC;
175 void data_extract_to_command(archive_handle_t *archive_handle) FAST_FUNC;
177 void header_skip(const file_header_t *file_header) FAST_FUNC;
178 void header_list(const file_header_t *file_header) FAST_FUNC;
179 void header_verbose_list(const file_header_t *file_header) FAST_FUNC;
181 char get_header_ar(archive_handle_t *archive_handle) FAST_FUNC;
182 char get_header_cpio(archive_handle_t *archive_handle) FAST_FUNC;
183 char get_header_tar(archive_handle_t *archive_handle) FAST_FUNC;
184 char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC;
185 char get_header_tar_bz2(archive_handle_t *archive_handle) FAST_FUNC;
186 char get_header_tar_lzma(archive_handle_t *archive_handle) FAST_FUNC;
188 void seek_by_jump(int fd, off_t amount) FAST_FUNC;
189 void seek_by_read(int fd, off_t amount) FAST_FUNC;
191 const char *strip_unsafe_prefix(const char *str) FAST_FUNC;
193 void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC;
194 const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC;
195 const llist_t *find_list_entry2(const llist_t *list, const char *filename) FAST_FUNC;
197 /* A bit of bunzip2 internals are exposed for compressed help support: */
198 typedef struct bunzip_data bunzip_data;
199 int start_bunzip(bunzip_data **bdp, int in_fd, const void *inbuf, int len) FAST_FUNC;
200 /* NB: read_bunzip returns < 0 on error, or the number of *unfilled* bytes
201 * in outbuf. IOW: on EOF returns len ("all bytes are not filled"), not 0: */
202 int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC;
203 void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;
205 /* Meaning and direction (input/output) of the fields are transformer-specific */
206 typedef struct transformer_aux_data_t {
207 smallint check_signature; /* most often referenced member */
209 off_t bytes_in; /* used in unzip code only: needs to know packed size */
211 time_t mtime; /* gunzip code may set this on exit */
212 } transformer_aux_data_t;
214 void init_transformer_aux_data(transformer_aux_data_t *aux) FAST_FUNC;
215 int FAST_FUNC check_signature16(transformer_aux_data_t *aux, int src_fd, unsigned magic16) FAST_FUNC;
217 IF_DESKTOP(long long) int inflate_unzip(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
218 IF_DESKTOP(long long) int unpack_Z_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
219 IF_DESKTOP(long long) int unpack_gz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
220 IF_DESKTOP(long long) int unpack_bz2_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
221 IF_DESKTOP(long long) int unpack_lzma_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
222 IF_DESKTOP(long long) int unpack_xz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) FAST_FUNC;
224 char* append_ext(char *filename, const char *expected_ext) FAST_FUNC;
225 int bbunpack(char **argv,
226 IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(transformer_aux_data_t *aux),
227 char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
228 const char *expected_ext
231 void check_errors_in_children(int signo);
233 void open_transformer(int fd,
235 IF_DESKTOP(long long) int FAST_FUNC (*transformer)(transformer_aux_data_t *aux, int src_fd, int dst_fd)
237 #define open_transformer_with_sig(fd, transformer, transform_prog) open_transformer((fd), 1, (transformer))
238 #define open_transformer_with_no_sig(fd, transformer) open_transformer((fd), 0, (transformer))
240 void open_transformer(int fd, const char *transform_prog) FAST_FUNC;
241 #define open_transformer_with_sig(fd, transformer, transform_prog) open_transformer((fd), (transform_prog))
242 /* open_transformer_with_no_sig() does not exist on NOMMU */
246 POP_SAVED_FUNCTION_VISIBILITY