?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
busybox: update to 1.23.2
[tomato.git] / release / src / router / busybox / archival / unzip.c
blob38a07e2120112d673953ffa8a3d23e2de2602e2a
1 /* vi: set sw=4 ts=4: */
2 /*
3 * Mini unzip implementation for busybox
4 *
5 * Copyright (C) 2004 by Ed Clark
6 *
7 * Loosely based on original busybox unzip applet by Laurence Anderson.
8 * All options and features should work in this version.
9 *
10 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
11 */
12 /* For reference see
13 * http://www.pkware.com/company/standards/appnote/
14 * http://www.info-zip.org/pub/infozip/doc/appnote-iz-latest.zip
15 *
16 * TODO
17 * Zip64 + other methods
18 */
19
20 //config:config UNZIP
21 //config: bool "unzip"
22 //config: default y
23 //config: help
24 //config: unzip will list or extract files from a ZIP archive,
25 //config: commonly found on DOS/WIN systems. The default behavior
26 //config: (with no options) is to extract the archive into the
27 //config: current directory. Use the `-d' option to extract to a
28 //config: directory of your choice.
29
30 //applet:IF_UNZIP(APPLET(unzip, BB_DIR_USR_BIN, BB_SUID_DROP))
31 //kbuild:lib-$(CONFIG_UNZIP) += unzip.o
32
33 //usage:#define unzip_trivial_usage
34 //usage: "[-lnopq] FILE[.zip] [FILE]... [-x FILE...] [-d DIR]"
35 //usage:#define unzip_full_usage "\n\n"
36 //usage: "Extract FILEs from ZIP archive\n"
37 //usage: "\n -l List contents (with -q for short form)"
38 //usage: "\n -n Never overwrite files (default: ask)"
39 //usage: "\n -o Overwrite"
40 //usage: "\n -p Print to stdout"
41 //usage: "\n -q Quiet"
42 //usage: "\n -x FILE Exclude FILEs"
43 //usage: "\n -d DIR Extract into DIR"
44
45 #include "libbb.h"
46 #include "bb_archive.h"
47
48 enum {
49 #if BB_BIG_ENDIAN
50 ZIP_FILEHEADER_MAGIC = 0x504b0304,
51 ZIP_CDF_MAGIC = 0x504b0102, /* central directory's file header */
52 ZIP_CDE_MAGIC = 0x504b0506, /* "end of central directory" record */
53 ZIP_DD_MAGIC = 0x504b0708,
54 #else
55 ZIP_FILEHEADER_MAGIC = 0x04034b50,
56 ZIP_CDF_MAGIC = 0x02014b50,
57 ZIP_CDE_MAGIC = 0x06054b50,
58 ZIP_DD_MAGIC = 0x08074b50,
59 #endif
60 };
61
62 #define ZIP_HEADER_LEN 26
63
64 typedef union {
65 uint8_t raw[ZIP_HEADER_LEN];
66 struct {
67 uint16_t version; /* 0-1 */
68 uint16_t zip_flags; /* 2-3 */
69 uint16_t method; /* 4-5 */
70 uint16_t modtime; /* 6-7 */
71 uint16_t moddate; /* 8-9 */
72 uint32_t crc32 PACKED; /* 10-13 */
73 uint32_t cmpsize PACKED; /* 14-17 */
74 uint32_t ucmpsize PACKED; /* 18-21 */
75 uint16_t filename_len; /* 22-23 */
76 uint16_t extra_len; /* 24-25 */
77 } formatted PACKED;
78 } zip_header_t; /* PACKED - gcc 4.2.1 doesn't like it (spews warning) */
79
80 /* Check the offset of the last element, not the length. This leniency
81 * allows for poor packing, whereby the overall struct may be too long,
82 * even though the elements are all in the right place.
83 */
84 struct BUG_zip_header_must_be_26_bytes {
85 char BUG_zip_header_must_be_26_bytes[
86 offsetof(zip_header_t, formatted.extra_len) + 2
87 == ZIP_HEADER_LEN ? 1 : -1];
88 };
89
90 #define FIX_ENDIANNESS_ZIP(zip_header) do { \
91 (zip_header).formatted.version = SWAP_LE16((zip_header).formatted.version ); \
92 (zip_header).formatted.method = SWAP_LE16((zip_header).formatted.method ); \
93 (zip_header).formatted.modtime = SWAP_LE16((zip_header).formatted.modtime ); \
94 (zip_header).formatted.moddate = SWAP_LE16((zip_header).formatted.moddate ); \
95 (zip_header).formatted.crc32 = SWAP_LE32((zip_header).formatted.crc32 ); \
96 (zip_header).formatted.cmpsize = SWAP_LE32((zip_header).formatted.cmpsize ); \
97 (zip_header).formatted.ucmpsize = SWAP_LE32((zip_header).formatted.ucmpsize ); \
98 (zip_header).formatted.filename_len = SWAP_LE16((zip_header).formatted.filename_len); \
99 (zip_header).formatted.extra_len = SWAP_LE16((zip_header).formatted.extra_len ); \
100 } while (0)
101
102 #define CDF_HEADER_LEN 42
103
104 typedef union {
105 uint8_t raw[CDF_HEADER_LEN];
106 struct {
107 /* uint32_t signature; 50 4b 01 02 */
108 uint16_t version_made_by; /* 0-1 */
109 uint16_t version_needed; /* 2-3 */
110 uint16_t cdf_flags; /* 4-5 */
111 uint16_t method; /* 6-7 */
112 uint16_t mtime; /* 8-9 */
113 uint16_t mdate; /* 10-11 */
114 uint32_t crc32; /* 12-15 */
115 uint32_t cmpsize; /* 16-19 */
116 uint32_t ucmpsize; /* 20-23 */
117 uint16_t file_name_length; /* 24-25 */
118 uint16_t extra_field_length; /* 26-27 */
119 uint16_t file_comment_length; /* 28-29 */
120 uint16_t disk_number_start; /* 30-31 */
121 uint16_t internal_file_attributes; /* 32-33 */
122 uint32_t external_file_attributes PACKED; /* 34-37 */
123 uint32_t relative_offset_of_local_header PACKED; /* 38-41 */
124 } formatted PACKED;
125 } cdf_header_t;
126
127 struct BUG_cdf_header_must_be_42_bytes {
128 char BUG_cdf_header_must_be_42_bytes[
129 offsetof(cdf_header_t, formatted.relative_offset_of_local_header) + 4
130 == CDF_HEADER_LEN ? 1 : -1];
131 };
132
133 #define FIX_ENDIANNESS_CDF(cdf_header) do { \
134 (cdf_header).formatted.crc32 = SWAP_LE32((cdf_header).formatted.crc32 ); \
135 (cdf_header).formatted.cmpsize = SWAP_LE32((cdf_header).formatted.cmpsize ); \
136 (cdf_header).formatted.ucmpsize = SWAP_LE32((cdf_header).formatted.ucmpsize ); \
137 (cdf_header).formatted.file_name_length = SWAP_LE16((cdf_header).formatted.file_name_length); \
138 (cdf_header).formatted.extra_field_length = SWAP_LE16((cdf_header).formatted.extra_field_length); \
139 (cdf_header).formatted.file_comment_length = SWAP_LE16((cdf_header).formatted.file_comment_length); \
140 IF_DESKTOP( \
141 (cdf_header).formatted.version_made_by = SWAP_LE16((cdf_header).formatted.version_made_by); \
142 (cdf_header).formatted.external_file_attributes = SWAP_LE32((cdf_header).formatted.external_file_attributes); \
143 ) \
144 } while (0)
145
146 #define CDE_HEADER_LEN 16
147
148 typedef union {
149 uint8_t raw[CDE_HEADER_LEN];
150 struct {
151 /* uint32_t signature; 50 4b 05 06 */
152 uint16_t this_disk_no;
153 uint16_t disk_with_cdf_no;
154 uint16_t cdf_entries_on_this_disk;
155 uint16_t cdf_entries_total;
156 uint32_t cdf_size;
157 uint32_t cdf_offset;
158 /* uint16_t file_comment_length; */
159 /* .ZIP file comment (variable size) */
160 } formatted PACKED;
161 } cde_header_t;
162
163 struct BUG_cde_header_must_be_16_bytes {
164 char BUG_cde_header_must_be_16_bytes[
165 sizeof(cde_header_t) == CDE_HEADER_LEN ? 1 : -1];
166 };
167
168 #define FIX_ENDIANNESS_CDE(cde_header) do { \
169 (cde_header).formatted.cdf_offset = SWAP_LE32((cde_header).formatted.cdf_offset); \
170 } while (0)
171
172 enum { zip_fd = 3 };
173
174
175 #if ENABLE_DESKTOP
176
177 /* Seen in the wild:
178 * Self-extracting PRO2K3XP_32.exe contains 19078464 byte zip archive,
179 * where CDE was nearly 48 kbytes before EOF.
180 * (Surprisingly, it also apparently has *another* CDE structure
181 * closer to the end, with bogus cdf_offset).
182 * To make extraction work, bumped PEEK_FROM_END from 16k to 64k.
183 */
184 #define PEEK_FROM_END (64*1024)
185
186 /* This value means that we failed to find CDF */
187 #define BAD_CDF_OFFSET ((uint32_t)0xffffffff)
188
189 /* NB: does not preserve file position! */
190 static uint32_t find_cdf_offset(void)
191 {
192 cde_header_t cde_header;
193 unsigned char *p;
194 off_t end;
195 unsigned char *buf = xzalloc(PEEK_FROM_END);
196
197 end = xlseek(zip_fd, 0, SEEK_END);
198 end -= PEEK_FROM_END;
199 if (end < 0)
200 end = 0;
201 xlseek(zip_fd, end, SEEK_SET);
202 full_read(zip_fd, buf, PEEK_FROM_END);
203
204 cde_header.formatted.cdf_offset = BAD_CDF_OFFSET;
205 p = buf;
206 while (p <= buf + PEEK_FROM_END - CDE_HEADER_LEN - 4) {
207 if (*p != 'P') {
208 p++;
209 continue;
210 }
211 if (*++p != 'K')
212 continue;
213 if (*++p != 5)
214 continue;
215 if (*++p != 6)
216 continue;
217 /* we found CDE! */
218 memcpy(cde_header.raw, p + 1, CDE_HEADER_LEN);
219 FIX_ENDIANNESS_CDE(cde_header);
220 /*
221 * I've seen .ZIP files with seemingly valid CDEs
222 * where cdf_offset points past EOF - ??
223 * Ignore such CDEs:
224 */
225 if (cde_header.formatted.cdf_offset < end + (p - buf))
226 break;
227 cde_header.formatted.cdf_offset = BAD_CDF_OFFSET;
228 }
229 free(buf);
230 return cde_header.formatted.cdf_offset;
231 };
232
233 static uint32_t read_next_cdf(uint32_t cdf_offset, cdf_header_t *cdf_ptr)
234 {
235 off_t org;
236
237 org = xlseek(zip_fd, 0, SEEK_CUR);
238
239 if (!cdf_offset)
240 cdf_offset = find_cdf_offset();
241
242 if (cdf_offset != BAD_CDF_OFFSET) {
243 xlseek(zip_fd, cdf_offset + 4, SEEK_SET);
244 xread(zip_fd, cdf_ptr->raw, CDF_HEADER_LEN);
245 FIX_ENDIANNESS_CDF(*cdf_ptr);
246 cdf_offset += 4 + CDF_HEADER_LEN
247 + cdf_ptr->formatted.file_name_length
248 + cdf_ptr->formatted.extra_field_length
249 + cdf_ptr->formatted.file_comment_length;
250 }
251
252 xlseek(zip_fd, org, SEEK_SET);
253 return cdf_offset;
254 };
255 #endif
256
257 static void unzip_skip(off_t skip)
258 {
259 if (skip != 0)
260 if (lseek(zip_fd, skip, SEEK_CUR) == (off_t)-1)
261 bb_copyfd_exact_size(zip_fd, -1, skip);
262 }
263
264 static void unzip_create_leading_dirs(const char *fn)
265 {
266 /* Create all leading directories */
267 char *name = xstrdup(fn);
268 if (bb_make_directory(dirname(name), 0777, FILEUTILS_RECUR)) {
269 xfunc_die(); /* bb_make_directory is noisy */
270 }
271 free(name);
272 }
273
274 static void unzip_extract(zip_header_t *zip_header, int dst_fd)
275 {
276 if (zip_header->formatted.method == 0) {
277 /* Method 0 - stored (not compressed) */
278 off_t size = zip_header->formatted.ucmpsize;
279 if (size)
280 bb_copyfd_exact_size(zip_fd, dst_fd, size);
281 } else {
282 /* Method 8 - inflate */
283 transformer_state_t xstate;
284 init_transformer_state(&xstate);
285 xstate.bytes_in = zip_header->formatted.cmpsize;
286 xstate.src_fd = zip_fd;
287 xstate.dst_fd = dst_fd;
288 if (inflate_unzip(&xstate) < 0)
289 bb_error_msg_and_die("inflate error");
290 /* Validate decompression - crc */
291 if (zip_header->formatted.crc32 != (xstate.crc32 ^ 0xffffffffL)) {
292 bb_error_msg_and_die("crc error");
293 }
294 /* Validate decompression - size */
295 if (zip_header->formatted.ucmpsize != xstate.bytes_out) {
296 /* Don't die. Who knows, maybe len calculation
297 * was botched somewhere. After all, crc matched! */
298 bb_error_msg("bad length");
299 }
300 }
301 }
302
303 static void my_fgets80(char *buf80)
304 {
305 fflush_all();
306 if (!fgets(buf80, 80, stdin)) {
307 bb_perror_msg_and_die("can't read standard input");
308 }
309 }
310
311 int unzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
312 int unzip_main(int argc, char **argv)
313 {
314 enum { O_PROMPT, O_NEVER, O_ALWAYS };
315
316 zip_header_t zip_header;
317 smallint quiet = 0;
318 IF_NOT_DESKTOP(const) smallint verbose = 0;
319 smallint listing = 0;
320 smallint overwrite = O_PROMPT;
321 smallint x_opt_seen;
322 #if ENABLE_DESKTOP
323 uint32_t cdf_offset;
324 #endif
325 unsigned long total_usize;
326 unsigned long total_size;
327 unsigned total_entries;
328 int dst_fd = -1;
329 char *src_fn = NULL;
330 char *dst_fn = NULL;
331 llist_t *zaccept = NULL;
332 llist_t *zreject = NULL;
333 char *base_dir = NULL;
334 int i, opt;
335 char key_buf[80]; /* must match size used by my_fgets80 */
336 struct stat stat_buf;
337
338 /* -q, -l and -v: UnZip 5.52 of 28 February 2005, by Info-ZIP:
339 *
340 * # /usr/bin/unzip -qq -v decompress_unlzma.i.zip
341 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
342 * # /usr/bin/unzip -q -v decompress_unlzma.i.zip
343 * Length Method Size Ratio Date Time CRC-32 Name
344 * -------- ------ ------- ----- ---- ---- ------ ----
345 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
346 * -------- ------- --- -------
347 * 204372 35278 83% 1 file
348 * # /usr/bin/unzip -v decompress_unlzma.i.zip
349 * Archive: decompress_unlzma.i.zip
350 * Length Method Size Ratio Date Time CRC-32 Name
351 * -------- ------ ------- ----- ---- ---- ------ ----
352 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
353 * -------- ------- --- -------
354 * 204372 35278 83% 1 file
355 * # unzip -v decompress_unlzma.i.zip
356 * Archive: decompress_unlzma.i.zip
357 * Length Date Time Name
358 * -------- ---- ---- ----
359 * 204372 09-06-09 14:23 decompress_unlzma.i
360 * -------- -------
361 * 204372 1 files
362 * # /usr/bin/unzip -l -qq decompress_unlzma.i.zip
363 * 204372 09-06-09 14:23 decompress_unlzma.i
364 * # /usr/bin/unzip -l -q decompress_unlzma.i.zip
365 * Length Date Time Name
366 * -------- ---- ---- ----
367 * 204372 09-06-09 14:23 decompress_unlzma.i
368 * -------- -------
369 * 204372 1 file
370 * # /usr/bin/unzip -l decompress_unlzma.i.zip
371 * Archive: decompress_unlzma.i.zip
372 * Length Date Time Name
373 * -------- ---- ---- ----
374 * 204372 09-06-09 14:23 decompress_unlzma.i
375 * -------- -------
376 * 204372 1 file
377 */
378
379 x_opt_seen = 0;
380 /* '-' makes getopt return 1 for non-options */
381 while ((opt = getopt(argc, argv, "-d:lnopqxv")) != -1) {
382 switch (opt) {
383 case 'd': /* Extract to base directory */
384 base_dir = optarg;
385 break;
386
387 case 'l': /* List */
388 listing = 1;
389 break;
390
391 case 'n': /* Never overwrite existing files */
392 overwrite = O_NEVER;
393 break;
394
395 case 'o': /* Always overwrite existing files */
396 overwrite = O_ALWAYS;
397 break;
398
399 case 'p': /* Extract files to stdout and fall through to set verbosity */
400 dst_fd = STDOUT_FILENO;
401
402 case 'q': /* Be quiet */
403 quiet++;
404 break;
405
406 case 'v': /* Verbose list */
407 IF_DESKTOP(verbose++;)
408 listing = 1;
409 break;
410
411 case 'x':
412 x_opt_seen = 1;
413 break;
414
415 case 1:
416 if (!src_fn) {
417 /* The zip file */
418 /* +5: space for ".zip" and NUL */
419 src_fn = xmalloc(strlen(optarg) + 5);
420 strcpy(src_fn, optarg);
421 } else if (!x_opt_seen) {
422 /* Include files */
423 llist_add_to(&zaccept, optarg);
424 } else {
425 /* Exclude files */
426 llist_add_to(&zreject, optarg);
427 }
428 break;
429
430 default:
431 bb_show_usage();
432 }
433 }
434
435 #ifndef __GLIBC__
436 /*
437 * This code is needed for non-GNU getopt
438 * which doesn't understand "-" in option string.
439 * The -x option won't work properly in this case:
440 * "unzip a.zip q -x w e" will be interpreted as
441 * "unzip a.zip q w e -x" = "unzip a.zip q w e"
442 */
443 argv += optind;
444 if (argv[0]) {
445 /* +5: space for ".zip" and NUL */
446 src_fn = xmalloc(strlen(argv[0]) + 5);
447 strcpy(src_fn, argv[0]);
448 while (*++argv)
449 llist_add_to(&zaccept, *argv);
450 }
451 #endif
452
453 if (!src_fn) {
454 bb_show_usage();
455 }
456
457 /* Open input file */
458 if (LONE_DASH(src_fn)) {
459 xdup2(STDIN_FILENO, zip_fd);
460 /* Cannot use prompt mode since zip data is arriving on STDIN */
461 if (overwrite == O_PROMPT)
462 overwrite = O_NEVER;
463 } else {
464 static const char extn[][5] = { ".zip", ".ZIP" };
465 char *ext = src_fn + strlen(src_fn);
466 int src_fd;
467
468 i = 0;
469 for (;;) {
470 src_fd = open(src_fn, O_RDONLY);
471 if (src_fd >= 0)
472 break;
473 if (++i > 2) {
474 *ext = '\0';
475 bb_error_msg_and_die("can't open %s[.zip]", src_fn);
476 }
477 strcpy(ext, extn[i - 1]);
478 }
479 xmove_fd(src_fd, zip_fd);
480 }
481
482 /* Change dir if necessary */
483 if (base_dir)
484 xchdir(base_dir);
485
486 if (quiet <= 1) { /* not -qq */
487 if (quiet == 0)
488 printf("Archive: %s\n", src_fn);
489 if (listing) {
490 puts(verbose ?
491 " Length Method Size Ratio Date Time CRC-32 Name\n"
492 "-------- ------ ------- ----- ---- ---- ------ ----"
493 :
494 " Length Date Time Name\n"
495 " -------- ---- ---- ----"
496 );
497 }
498 }
499
500 /* Example of an archive with one 0-byte long file named 'z'
501 * created by Zip 2.31 on Unix:
502 * 0000 [50 4b]03 04 0a 00 00 00 00 00 42 1a b8 3c 00 00 |PK........B..<..|
503 * sig........ vneed flags compr mtime mdate crc32>
504 * 0010 00 00 00 00 00 00 00 00 00 00 01 00 15 00 7a 55 |..............zU|
505 * >..... csize...... usize...... fnlen exlen fn ex>
506 * 0020 54 09 00 03 cc d3 f9 4b cc d3 f9 4b 55 78 04 00 |T......K...KUx..|
507 * >tra_field......................................
508 * 0030 00 00 00 00[50 4b]01 02 17 03 0a 00 00 00 00 00 |....PK..........|
509 * ........... sig........ vmade vneed flags compr
510 * 0040 42 1a b8 3c 00 00 00 00 00 00 00 00 00 00 00 00 |B..<............|
511 * mtime mdate crc32...... csize...... usize......
512 * 0050 01 00 0d 00 00 00 00 00 00 00 00 00 a4 81 00 00 |................|
513 * fnlen exlen clen. dnum. iattr eattr...... relofs> (eattr = rw-r--r--)
514 * 0060 00 00 7a 55 54 05 00 03 cc d3 f9 4b 55 78 00 00 |..zUT......KUx..|
515 * >..... fn extra_field...........................
516 * 0070 [50 4b]05 06 00 00 00 00 01 00 01 00 3c 00 00 00 |PK..........<...|
517 * 0080 34 00 00 00 00 00 |4.....|
518 */
519 total_usize = 0;
520 total_size = 0;
521 total_entries = 0;
522 #if ENABLE_DESKTOP
523 cdf_offset = 0;
524 #endif
525 while (1) {
526 uint32_t magic;
527 mode_t dir_mode = 0777;
528 #if ENABLE_DESKTOP
529 mode_t file_mode = 0666;
530 #endif
531
532 /* Check magic number */
533 xread(zip_fd, &magic, 4);
534 /* Central directory? It's at the end, so exit */
535 if (magic == ZIP_CDF_MAGIC)
536 break;
537 #if ENABLE_DESKTOP
538 /* Data descriptor? It was a streaming file, go on */
539 if (magic == ZIP_DD_MAGIC) {
540 /* skip over duplicate crc32, cmpsize and ucmpsize */
541 unzip_skip(3 * 4);
542 continue;
543 }
544 #endif
545 if (magic != ZIP_FILEHEADER_MAGIC)
546 bb_error_msg_and_die("invalid zip magic %08X", (int)magic);
547
548 /* Read the file header */
549 xread(zip_fd, zip_header.raw, ZIP_HEADER_LEN);
550 FIX_ENDIANNESS_ZIP(zip_header);
551 if ((zip_header.formatted.method != 0) && (zip_header.formatted.method != 8)) {
552 bb_error_msg_and_die("unsupported method %d", zip_header.formatted.method);
553 }
554 #if !ENABLE_DESKTOP
555 if (zip_header.formatted.zip_flags & SWAP_LE16(0x0009)) {
556 bb_error_msg_and_die("zip flags 1 and 8 are not supported");
557 }
558 #else
559 if (zip_header.formatted.zip_flags & SWAP_LE16(0x0001)) {
560 /* 0x0001 - encrypted */
561 bb_error_msg_and_die("zip flag 1 (encryption) is not supported");
562 }
563
564 if (cdf_offset != BAD_CDF_OFFSET) {
565 cdf_header_t cdf_header;
566 cdf_offset = read_next_cdf(cdf_offset, &cdf_header);
567 /*
568 * Note: cdf_offset can become BAD_CDF_OFFSET after the above call.
569 */
570 if (zip_header.formatted.zip_flags & SWAP_LE16(0x0008)) {
571 /* 0x0008 - streaming. [u]cmpsize can be reliably gotten
572 * only from Central Directory. See unzip_doc.txt
573 */
574 zip_header.formatted.crc32 = cdf_header.formatted.crc32;
575 zip_header.formatted.cmpsize = cdf_header.formatted.cmpsize;
576 zip_header.formatted.ucmpsize = cdf_header.formatted.ucmpsize;
577 }
578 if ((cdf_header.formatted.version_made_by >> 8) == 3) {
579 /* This archive is created on Unix */
580 dir_mode = file_mode = (cdf_header.formatted.external_file_attributes >> 16);
581 }
582 }
583 if (cdf_offset == BAD_CDF_OFFSET
584 && (zip_header.formatted.zip_flags & SWAP_LE16(0x0008))
585 ) {
586 /* If it's a streaming zip, we _require_ CDF */
587 bb_error_msg_and_die("can't find file table");
588 }
589 #endif
590
591 /* Read filename */
592 free(dst_fn);
593 dst_fn = xzalloc(zip_header.formatted.filename_len + 1);
594 xread(zip_fd, dst_fn, zip_header.formatted.filename_len);
595
596 /* Skip extra header bytes */
597 unzip_skip(zip_header.formatted.extra_len);
598
599 /* Filter zip entries */
600 if (find_list_entry(zreject, dst_fn)
601 || (zaccept && !find_list_entry(zaccept, dst_fn))
602 ) { /* Skip entry */
603 i = 'n';
604
605 } else { /* Extract entry */
606 if (listing) { /* List entry */
607 unsigned dostime = zip_header.formatted.modtime | (zip_header.formatted.moddate << 16);
608 if (!verbose) {
609 // " Length Date Time Name\n"
610 // " -------- ---- ---- ----"
611 printf( "%9u %02u-%02u-%02u %02u:%02u %s\n",
612 (unsigned)zip_header.formatted.ucmpsize,
613 (dostime & 0x01e00000) >> 21,
614 (dostime & 0x001f0000) >> 16,
615 (((dostime & 0xfe000000) >> 25) + 1980) % 100,
616 (dostime & 0x0000f800) >> 11,
617 (dostime & 0x000007e0) >> 5,
618 dst_fn);
619 total_usize += zip_header.formatted.ucmpsize;
620 } else {
621 unsigned long percents = zip_header.formatted.ucmpsize - zip_header.formatted.cmpsize;
622 percents = percents * 100;
623 if (zip_header.formatted.ucmpsize)
624 percents /= zip_header.formatted.ucmpsize;
625 // " Length Method Size Ratio Date Time CRC-32 Name\n"
626 // "-------- ------ ------- ----- ---- ---- ------ ----"
627 printf( "%8u Defl:N" "%9u%4u%% %02u-%02u-%02u %02u:%02u %08x %s\n",
628 (unsigned)zip_header.formatted.ucmpsize,
629 (unsigned)zip_header.formatted.cmpsize,
630 (unsigned)percents,
631 (dostime & 0x01e00000) >> 21,
632 (dostime & 0x001f0000) >> 16,
633 (((dostime & 0xfe000000) >> 25) + 1980) % 100,
634 (dostime & 0x0000f800) >> 11,
635 (dostime & 0x000007e0) >> 5,
636 zip_header.formatted.crc32,
637 dst_fn);
638 total_usize += zip_header.formatted.ucmpsize;
639 total_size += zip_header.formatted.cmpsize;
640 }
641 i = 'n';
642 } else if (dst_fd == STDOUT_FILENO) { /* Extracting to STDOUT */
643 i = -1;
644 } else if (last_char_is(dst_fn, '/')) { /* Extract directory */
645 if (stat(dst_fn, &stat_buf) == -1) {
646 if (errno != ENOENT) {
647 bb_perror_msg_and_die("can't stat '%s'", dst_fn);
648 }
649 if (!quiet) {
650 printf(" creating: %s\n", dst_fn);
651 }
652 unzip_create_leading_dirs(dst_fn);
653 if (bb_make_directory(dst_fn, dir_mode, FILEUTILS_IGNORE_CHMOD_ERR)) {
654 xfunc_die();
655 }
656 } else {
657 if (!S_ISDIR(stat_buf.st_mode)) {
658 bb_error_msg_and_die("'%s' exists but is not directory", dst_fn);
659 }
660 }
661 i = 'n';
662
663 } else { /* Extract file */
664 check_file:
665 if (stat(dst_fn, &stat_buf) == -1) { /* File does not exist */
666 if (errno != ENOENT) {
667 bb_perror_msg_and_die("can't stat '%s'", dst_fn);
668 }
669 i = 'y';
670 } else { /* File already exists */
671 if (overwrite == O_NEVER) {
672 i = 'n';
673 } else if (S_ISREG(stat_buf.st_mode)) { /* File is regular file */
674 if (overwrite == O_ALWAYS) {
675 i = 'y';
676 } else {
677 printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ", dst_fn);
678 my_fgets80(key_buf);
679 i = key_buf[0];
680 }
681 } else { /* File is not regular file */
682 bb_error_msg_and_die("'%s' exists but is not regular file", dst_fn);
683 }
684 }
685 }
686 }
687
688 switch (i) {
689 case 'A':
690 overwrite = O_ALWAYS;
691 case 'y': /* Open file and fall into unzip */
692 unzip_create_leading_dirs(dst_fn);
693 #if ENABLE_DESKTOP
694 dst_fd = xopen3(dst_fn, O_WRONLY | O_CREAT | O_TRUNC, file_mode);
695 #else
696 dst_fd = xopen(dst_fn, O_WRONLY | O_CREAT | O_TRUNC);
697 #endif
698 case -1: /* Unzip */
699 if (!quiet) {
700 printf(" inflating: %s\n", dst_fn);
701 }
702 unzip_extract(&zip_header, dst_fd);
703 if (dst_fd != STDOUT_FILENO) {
704 /* closing STDOUT is potentially bad for future business */
705 close(dst_fd);
706 }
707 break;
708
709 case 'N':
710 overwrite = O_NEVER;
711 case 'n':
712 /* Skip entry data */
713 unzip_skip(zip_header.formatted.cmpsize);
714 break;
715
716 case 'r':
717 /* Prompt for new name */
718 printf("new name: ");
719 my_fgets80(key_buf);
720 free(dst_fn);
721 dst_fn = xstrdup(key_buf);
722 chomp(dst_fn);
723 goto check_file;
724
725 default:
726 printf("error: invalid response [%c]\n", (char)i);
727 goto check_file;
728 }
729
730 total_entries++;
731 }
732
733 if (listing && quiet <= 1) {
734 if (!verbose) {
735 // " Length Date Time Name\n"
736 // " -------- ---- ---- ----"
737 printf( " -------- -------\n"
738 "%9lu" " %u files\n",
739 total_usize, total_entries);
740 } else {
741 unsigned long percents = total_usize - total_size;
742 percents = percents * 100;
743 if (total_usize)
744 percents /= total_usize;
745 // " Length Method Size Ratio Date Time CRC-32 Name\n"
746 // "-------- ------ ------- ----- ---- ---- ------ ----"
747 printf( "-------- ------- --- -------\n"
748 "%8lu" "%17lu%4u%% %u files\n",
749 total_usize, total_size, (unsigned)percents,
750 total_entries);
751 }
752 }
753
754 return 0;
755 }
Tomato firmware and modifications.