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 signature: 0xfd, '7', 'z', 'X', 'Z', 0x00 */
13 /* More info at: http://tukaani.org/xz/xz-file-format.txt */
14 XZ_MAGIC1
= 0xfd * 256 + '7',
15 XZ_MAGIC2
= (('z' * 256 + 'X') * 256 + 'Z') * 256 + 0,
16 /* Different form: 32 bits, then 16 bits: */
17 XZ_MAGIC1a
= ((0xfd * 256 + '7') * 256 + 'z') * 256 + 'X',
18 XZ_MAGIC2a
= 'Z' * 256 + 0,
20 COMPRESS_MAGIC
= 0x9d1f,
22 BZIP2_MAGIC
= 'Z' * 256 + 'B',
23 XZ_MAGIC1
= '7' * 256 + 0xfd,
24 XZ_MAGIC2
= ((0 * 256 + 'Z') * 256 + 'X') * 256 + 'z',
25 XZ_MAGIC1a
= (('X' * 256 + 'z') * 256 + '7') * 256 + 0xfd,
26 XZ_MAGIC2a
= 0 * 256 + 'Z',
30 typedef struct file_header_t
{
33 #if ENABLE_FEATURE_TAR_UNAME_GNAME
47 typedef struct archive_handle_t
{
48 /* Flags. 1st since it is most used member */
51 /* The raw stream as read from disk or stdin */
54 /* Define if the header and data component should be processed */
55 char FAST_FUNC (*filter
)(struct archive_handle_t
*);
56 /* List of files that have been accepted */
58 /* List of files that have been rejected */
60 /* List of files that have successfully been worked on */
63 /* Currently processed file's header */
64 file_header_t
*file_header
;
66 /* Process the header component, e.g. tar -t */
67 void FAST_FUNC (*action_header
)(const file_header_t
*);
69 /* Process the data component, e.g. extract to filesystem */
70 void FAST_FUNC (*action_data
)(struct archive_handle_t
*);
72 /* Function that skips data */
73 void FAST_FUNC (*seek
)(int fd
, off_t amount
);
75 /* Count processed bytes */
78 /* Archiver specific. Can make it a union if it ever gets big */
79 #if ENABLE_TAR || ENABLE_DPKG || ENABLE_DPKG_DEB
81 # if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
85 #if ENABLE_FEATURE_TAR_TO_COMMAND
86 char* tar__to_command
;
88 # if ENABLE_FEATURE_TAR_SELINUX
89 char* tar__global_sctx
;
90 char* tar__next_file_sctx
;
93 #if ENABLE_CPIO || ENABLE_RPM2CPIO || ENABLE_RPM
95 struct hardlinks_t
*cpio__hardlinks_to_create
;
96 struct hardlinks_t
*cpio__created_hardlinks
;
98 #if ENABLE_DPKG || ENABLE_DPKG_DEB
99 /* Temporary storage */
101 /* How to process any sub archive, e.g. get_header_tar_gz */
102 char FAST_FUNC (*dpkg__action_data_subarchive
)(struct archive_handle_t
*);
103 /* Contains the handle to a sub archive */
104 struct archive_handle_t
*dpkg__sub_archive
;
106 #if ENABLE_FEATURE_AR_CREATE
107 const char *ar__name
;
108 struct archive_handle_t
*ar__out
;
111 /* bits in ah_flags */
112 #define ARCHIVE_RESTORE_DATE (1 << 0)
113 #define ARCHIVE_CREATE_LEADING_DIRS (1 << 1)
114 #define ARCHIVE_UNLINK_OLD (1 << 2)
115 #define ARCHIVE_EXTRACT_QUIET (1 << 3)
116 #define ARCHIVE_EXTRACT_NEWER (1 << 4)
117 #define ARCHIVE_DONT_RESTORE_OWNER (1 << 5)
118 #define ARCHIVE_DONT_RESTORE_PERM (1 << 6)
119 #define ARCHIVE_NUMERIC_OWNER (1 << 7)
120 #define ARCHIVE_O_TRUNC (1 << 8)
123 /* POSIX tar Header Block, from POSIX 1003.1-1990 */
124 #define TAR_BLOCK_SIZE 512
125 #define NAME_SIZE 100
126 #define NAME_SIZE_STR "100"
127 typedef struct tar_header_t
{ /* byte offset */
128 char name
[NAME_SIZE
]; /* 0-99 */
129 char mode
[8]; /* 100-107 */
130 char uid
[8]; /* 108-115 */
131 char gid
[8]; /* 116-123 */
132 char size
[12]; /* 124-135 */
133 char mtime
[12]; /* 136-147 */
134 char chksum
[8]; /* 148-155 */
135 char typeflag
; /* 156-156 */
136 char linkname
[NAME_SIZE
]; /* 157-256 */
137 /* POSIX: "ustar" NUL "00" */
138 /* GNU tar: "ustar " NUL */
139 /* Normally it's defined as magic[6] followed by
140 * version[2], but we put them together to save code.
142 char magic
[8]; /* 257-264 */
143 char uname
[32]; /* 265-296 */
144 char gname
[32]; /* 297-328 */
145 char devmajor
[8]; /* 329-336 */
146 char devminor
[8]; /* 337-344 */
147 char prefix
[155]; /* 345-499 */
148 char padding
[12]; /* 500-512 (pad to exactly TAR_BLOCK_SIZE) */
150 struct BUG_tar_header
{
151 char c
[sizeof(tar_header_t
) == TAR_BLOCK_SIZE
? 1 : -1];
156 /* Info struct unpackers can fill out to inform users of thing like
157 * timestamps of unpacked files */
158 typedef struct unpack_info_t
{
162 extern archive_handle_t
*init_handle(void) FAST_FUNC
;
164 extern char filter_accept_all(archive_handle_t
*archive_handle
) FAST_FUNC
;
165 extern char filter_accept_list(archive_handle_t
*archive_handle
) FAST_FUNC
;
166 extern char filter_accept_list_reassign(archive_handle_t
*archive_handle
) FAST_FUNC
;
167 extern char filter_accept_reject_list(archive_handle_t
*archive_handle
) FAST_FUNC
;
169 extern void unpack_ar_archive(archive_handle_t
*ar_archive
) FAST_FUNC
;
171 extern void data_skip(archive_handle_t
*archive_handle
) FAST_FUNC
;
172 extern void data_extract_all(archive_handle_t
*archive_handle
) FAST_FUNC
;
173 extern void data_extract_to_stdout(archive_handle_t
*archive_handle
) FAST_FUNC
;
174 extern void data_extract_to_command(archive_handle_t
*archive_handle
) FAST_FUNC
;
176 extern void header_skip(const file_header_t
*file_header
) FAST_FUNC
;
177 extern void header_list(const file_header_t
*file_header
) FAST_FUNC
;
178 extern void header_verbose_list(const file_header_t
*file_header
) FAST_FUNC
;
180 extern char get_header_ar(archive_handle_t
*archive_handle
) FAST_FUNC
;
181 extern char get_header_cpio(archive_handle_t
*archive_handle
) FAST_FUNC
;
182 extern char get_header_tar(archive_handle_t
*archive_handle
) FAST_FUNC
;
183 extern char get_header_tar_gz(archive_handle_t
*archive_handle
) FAST_FUNC
;
184 extern char get_header_tar_bz2(archive_handle_t
*archive_handle
) FAST_FUNC
;
185 extern char get_header_tar_lzma(archive_handle_t
*archive_handle
) FAST_FUNC
;
187 extern void seek_by_jump(int fd
, off_t amount
) FAST_FUNC
;
188 extern void seek_by_read(int fd
, off_t amount
) FAST_FUNC
;
190 extern void data_align(archive_handle_t
*archive_handle
, unsigned boundary
) FAST_FUNC
;
191 extern const llist_t
*find_list_entry(const llist_t
*list
, const char *filename
) FAST_FUNC
;
192 extern const llist_t
*find_list_entry2(const llist_t
*list
, const char *filename
) FAST_FUNC
;
194 /* A bit of bunzip2 internals are exposed for compressed help support: */
195 typedef struct bunzip_data bunzip_data
;
196 int start_bunzip(bunzip_data
**bdp
, int in_fd
, const void *inbuf
, int len
) FAST_FUNC
;
197 /* NB: read_bunzip returns < 0 on error, or the number of *unfilled* bytes
198 * in outbuf. IOW: on EOF returns len ("all bytes are not filled"), not 0: */
199 int read_bunzip(bunzip_data
*bd
, char *outbuf
, int len
) FAST_FUNC
;
200 void dealloc_bunzip(bunzip_data
*bd
) FAST_FUNC
;
202 typedef struct inflate_unzip_result
{
205 } inflate_unzip_result
;
207 IF_DESKTOP(long long) int inflate_unzip(inflate_unzip_result
*res
, off_t compr_size
, int src_fd
, int dst_fd
) FAST_FUNC
;
208 /* xz unpacker takes .xz stream from offset 6 */
209 IF_DESKTOP(long long) int unpack_xz_stream(int src_fd
, int dst_fd
) FAST_FUNC
;
210 /* lzma unpacker takes .lzma stream from offset 0 */
211 IF_DESKTOP(long long) int unpack_lzma_stream(int src_fd
, int dst_fd
) FAST_FUNC
;
212 /* the rest wants 2 first bytes already skipped by the caller */
213 IF_DESKTOP(long long) int unpack_bz2_stream(int src_fd
, int dst_fd
) FAST_FUNC
;
214 IF_DESKTOP(long long) int unpack_gz_stream(int src_fd
, int dst_fd
) FAST_FUNC
;
215 IF_DESKTOP(long long) int unpack_gz_stream_with_info(int src_fd
, int dst_fd
, unpack_info_t
*info
) FAST_FUNC
;
216 IF_DESKTOP(long long) int unpack_Z_stream(int src_fd
, int dst_fd
) FAST_FUNC
;
217 /* wrapper which checks first two bytes to be "BZ" */
218 IF_DESKTOP(long long) int unpack_bz2_stream_prime(int src_fd
, int dst_fd
) FAST_FUNC
;
220 char* append_ext(char *filename
, const char *expected_ext
) FAST_FUNC
;
221 int bbunpack(char **argv
,
222 IF_DESKTOP(long long) int FAST_FUNC (*unpacker
)(unpack_info_t
*info
),
223 char* FAST_FUNC (*make_new_name
)(char *filename
, const char *expected_ext
),
224 const char *expected_ext
228 void open_transformer(int fd
,
229 IF_DESKTOP(long long) int FAST_FUNC (*transformer
)(int src_fd
, int dst_fd
)) FAST_FUNC
;
230 #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transformer)
232 void open_transformer(int src_fd
, const char *transform_prog
) FAST_FUNC
;
233 #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transform_prog)
236 POP_SAVED_FUNCTION_VISIBILITY