Contents of /trunk/mkinitrd-magellan/busybox/include/unarchive.h
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
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File size: 8650 byte(s)
Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 8650 byte(s)
-updated to busybox-1.17.1
1 | /* vi: set sw=4 ts=4: */ |
2 | #ifndef UNARCHIVE_H |
3 | #define UNARCHIVE_H 1 |
4 | |
5 | PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN |
6 | |
7 | enum { |
8 | #if BB_BIG_ENDIAN |
9 | COMPRESS_MAGIC = 0x1f9d, |
10 | GZIP_MAGIC = 0x1f8b, |
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, |
19 | #else |
20 | COMPRESS_MAGIC = 0x9d1f, |
21 | GZIP_MAGIC = 0x8b1f, |
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', |
27 | #endif |
28 | }; |
29 | |
30 | typedef struct file_header_t { |
31 | char *name; |
32 | char *link_target; |
33 | #if ENABLE_FEATURE_TAR_UNAME_GNAME |
34 | char *tar__uname; |
35 | char *tar__gname; |
36 | #endif |
37 | off_t size; |
38 | uid_t uid; |
39 | gid_t gid; |
40 | mode_t mode; |
41 | time_t mtime; |
42 | dev_t device; |
43 | } file_header_t; |
44 | |
45 | struct hardlinks_t; |
46 | |
47 | typedef struct archive_handle_t { |
48 | /* Flags. 1st since it is most used member */ |
49 | unsigned ah_flags; |
50 | |
51 | /* The raw stream as read from disk or stdin */ |
52 | int src_fd; |
53 | |
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 */ |
57 | llist_t *accept; |
58 | /* List of files that have been rejected */ |
59 | llist_t *reject; |
60 | /* List of files that have successfully been worked on */ |
61 | llist_t *passed; |
62 | |
63 | /* Currently processed file's header */ |
64 | file_header_t *file_header; |
65 | |
66 | /* Process the header component, e.g. tar -t */ |
67 | void FAST_FUNC (*action_header)(const file_header_t *); |
68 | |
69 | /* Process the data component, e.g. extract to filesystem */ |
70 | void FAST_FUNC (*action_data)(struct archive_handle_t *); |
71 | |
72 | /* Function that skips data */ |
73 | void FAST_FUNC (*seek)(int fd, off_t amount); |
74 | |
75 | /* Count processed bytes */ |
76 | off_t offset; |
77 | |
78 | /* Archiver specific. Can make it a union if it ever gets big */ |
79 | #if ENABLE_TAR || ENABLE_DPKG || ENABLE_DPKG_DEB |
80 | smallint tar__end; |
81 | # if ENABLE_FEATURE_TAR_GNU_EXTENSIONS |
82 | char* tar__longname; |
83 | char* tar__linkname; |
84 | # endif |
85 | #if ENABLE_FEATURE_TAR_TO_COMMAND |
86 | char* tar__to_command; |
87 | #endif |
88 | # if ENABLE_FEATURE_TAR_SELINUX |
89 | char* tar__global_sctx; |
90 | char* tar__next_file_sctx; |
91 | # endif |
92 | #endif |
93 | #if ENABLE_CPIO || ENABLE_RPM2CPIO || ENABLE_RPM |
94 | uoff_t cpio__blocks; |
95 | struct hardlinks_t *cpio__hardlinks_to_create; |
96 | struct hardlinks_t *cpio__created_hardlinks; |
97 | #endif |
98 | #if ENABLE_DPKG || ENABLE_DPKG_DEB |
99 | /* Temporary storage */ |
100 | char *dpkg__buffer; |
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; |
105 | #endif |
106 | #if ENABLE_FEATURE_AR_CREATE |
107 | const char *ar__name; |
108 | struct archive_handle_t *ar__out; |
109 | #endif |
110 | } archive_handle_t; |
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) |
121 | |
122 | |
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. |
141 | */ |
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) */ |
149 | } tar_header_t; |
150 | struct BUG_tar_header { |
151 | char c[sizeof(tar_header_t) == TAR_BLOCK_SIZE ? 1 : -1]; |
152 | }; |
153 | |
154 | |
155 | |
156 | /* Info struct unpackers can fill out to inform users of thing like |
157 | * timestamps of unpacked files */ |
158 | typedef struct unpack_info_t { |
159 | time_t mtime; |
160 | } unpack_info_t; |
161 | |
162 | extern archive_handle_t *init_handle(void) FAST_FUNC; |
163 | |
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; |
168 | |
169 | extern void unpack_ar_archive(archive_handle_t *ar_archive) FAST_FUNC; |
170 | |
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; |
175 | |
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; |
179 | |
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; |
186 | |
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; |
189 | |
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; |
193 | |
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 unsigned char *inbuf, int len) FAST_FUNC; |
197 | int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC; |
198 | void dealloc_bunzip(bunzip_data *bd) FAST_FUNC; |
199 | |
200 | typedef struct inflate_unzip_result { |
201 | off_t bytes_out; |
202 | uint32_t crc; |
203 | } inflate_unzip_result; |
204 | |
205 | IF_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, off_t compr_size, int src_fd, int dst_fd) FAST_FUNC; |
206 | /* xz unpacker takes .xz stream from offset 6 */ |
207 | IF_DESKTOP(long long) int unpack_xz_stream(int src_fd, int dst_fd) FAST_FUNC; |
208 | /* lzma unpacker takes .lzma stream from offset 0 */ |
209 | IF_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd) FAST_FUNC; |
210 | /* the rest wants 2 first bytes already skipped by the caller */ |
211 | IF_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd) FAST_FUNC; |
212 | IF_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd) FAST_FUNC; |
213 | IF_DESKTOP(long long) int unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info) FAST_FUNC; |
214 | IF_DESKTOP(long long) int unpack_Z_stream(int src_fd, int dst_fd) FAST_FUNC; |
215 | /* wrapper which checks first two bytes to be "BZ" */ |
216 | IF_DESKTOP(long long) int unpack_bz2_stream_prime(int src_fd, int dst_fd) FAST_FUNC; |
217 | |
218 | char* append_ext(char *filename, const char *expected_ext) FAST_FUNC; |
219 | int bbunpack(char **argv, |
220 | IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(unpack_info_t *info), |
221 | char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext), |
222 | const char *expected_ext |
223 | ) FAST_FUNC; |
224 | |
225 | #if BB_MMU |
226 | void open_transformer(int fd, |
227 | IF_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd)) FAST_FUNC; |
228 | #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transformer) |
229 | #else |
230 | void open_transformer(int src_fd, const char *transform_prog) FAST_FUNC; |
231 | #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transform_prog) |
232 | #endif |
233 | |
234 | POP_SAVED_FUNCTION_VISIBILITY |
235 | |
236 | #endif |