1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
/* 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;
/* 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 */
#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_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 check_signature; /* 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 check_signature,
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), 1, (transformer))
#define fork_transformer_with_no_sig(fd, transformer) fork_transformer((fd), 0, (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
|
