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    Contents of /trunk/mkinitrd-magellan/busybox/archival/unzip.c

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    Revision 1123 - (show annotations) (download)
    Wed Aug 18 21:56:57 2010 UTC (13 years, 8 months ago) by niro
    File MIME type: text/plain
    File size: 21566 byte(s) 
    -updated to busybox-1.17.1
    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 the GPL v2 or later, see the file LICENSE in this tarball.
    11 */
    12
    13 /* For reference see
    14 * http://www.pkware.com/company/standards/appnote/
    15 * http://www.info-zip.org/pub/infozip/doc/appnote-iz-latest.zip
    16 */
    17
    18 /* TODO
    19 * Zip64 + other methods
    20 */
    21
    22 #include "libbb.h"
    23 #include "unarchive.h"
    24
    25 enum {
    26 #if BB_BIG_ENDIAN
    27 ZIP_FILEHEADER_MAGIC = 0x504b0304,
    28 ZIP_CDF_MAGIC = 0x504b0102, /* central directory's file header */
    29 ZIP_CDE_MAGIC = 0x504b0506, /* "end of central directory" record */
    30 ZIP_DD_MAGIC = 0x504b0708,
    31 #else
    32 ZIP_FILEHEADER_MAGIC = 0x04034b50,
    33 ZIP_CDF_MAGIC = 0x02014b50,
    34 ZIP_CDE_MAGIC = 0x06054b50,
    35 ZIP_DD_MAGIC = 0x08074b50,
    36 #endif
    37 };
    38
    39 #define ZIP_HEADER_LEN 26
    40
    41 typedef union {
    42 uint8_t raw[ZIP_HEADER_LEN];
    43 struct {
    44 uint16_t version; /* 0-1 */
    45 uint16_t zip_flags; /* 2-3 */
    46 uint16_t method; /* 4-5 */
    47 uint16_t modtime; /* 6-7 */
    48 uint16_t moddate; /* 8-9 */
    49 uint32_t crc32 PACKED; /* 10-13 */
    50 uint32_t cmpsize PACKED; /* 14-17 */
    51 uint32_t ucmpsize PACKED; /* 18-21 */
    52 uint16_t filename_len; /* 22-23 */
    53 uint16_t extra_len; /* 24-25 */
    54 } formatted PACKED;
    55 } zip_header_t; /* PACKED - gcc 4.2.1 doesn't like it (spews warning) */
    56
    57 /* Check the offset of the last element, not the length. This leniency
    58 * allows for poor packing, whereby the overall struct may be too long,
    59 * even though the elements are all in the right place.
    60 */
    61 struct BUG_zip_header_must_be_26_bytes {
    62 char BUG_zip_header_must_be_26_bytes[
    63 offsetof(zip_header_t, formatted.extra_len) + 2
    64 == ZIP_HEADER_LEN ? 1 : -1];
    65 };
    66
    67 #define FIX_ENDIANNESS_ZIP(zip_header) do { \
    68 (zip_header).formatted.version = SWAP_LE16((zip_header).formatted.version ); \
    69 (zip_header).formatted.method = SWAP_LE16((zip_header).formatted.method ); \
    70 (zip_header).formatted.modtime = SWAP_LE16((zip_header).formatted.modtime ); \
    71 (zip_header).formatted.moddate = SWAP_LE16((zip_header).formatted.moddate ); \
    72 (zip_header).formatted.crc32 = SWAP_LE32((zip_header).formatted.crc32 ); \
    73 (zip_header).formatted.cmpsize = SWAP_LE32((zip_header).formatted.cmpsize ); \
    74 (zip_header).formatted.ucmpsize = SWAP_LE32((zip_header).formatted.ucmpsize ); \
    75 (zip_header).formatted.filename_len = SWAP_LE16((zip_header).formatted.filename_len); \
    76 (zip_header).formatted.extra_len = SWAP_LE16((zip_header).formatted.extra_len ); \
    77 } while (0)
    78
    79 #define CDF_HEADER_LEN 42
    80
    81 typedef union {
    82 uint8_t raw[CDF_HEADER_LEN];
    83 struct {
    84 /* uint32_t signature; 50 4b 01 02 */
    85 uint16_t version_made_by; /* 0-1 */
    86 uint16_t version_needed; /* 2-3 */
    87 uint16_t cdf_flags; /* 4-5 */
    88 uint16_t method; /* 6-7 */
    89 uint16_t mtime; /* 8-9 */
    90 uint16_t mdate; /* 10-11 */
    91 uint32_t crc32; /* 12-15 */
    92 uint32_t cmpsize; /* 16-19 */
    93 uint32_t ucmpsize; /* 20-23 */
    94 uint16_t file_name_length; /* 24-25 */
    95 uint16_t extra_field_length; /* 26-27 */
    96 uint16_t file_comment_length; /* 28-29 */
    97 uint16_t disk_number_start; /* 30-31 */
    98 uint16_t internal_file_attributes; /* 32-33 */
    99 uint32_t external_file_attributes PACKED; /* 34-37 */
    100 uint32_t relative_offset_of_local_header PACKED; /* 38-41 */
    101 } formatted PACKED;
    102 } cdf_header_t;
    103
    104 struct BUG_cdf_header_must_be_42_bytes {
    105 char BUG_cdf_header_must_be_42_bytes[
    106 offsetof(cdf_header_t, formatted.relative_offset_of_local_header) + 4
    107 == CDF_HEADER_LEN ? 1 : -1];
    108 };
    109
    110 #define FIX_ENDIANNESS_CDF(cdf_header) do { \
    111 (cdf_header).formatted.crc32 = SWAP_LE32((cdf_header).formatted.crc32 ); \
    112 (cdf_header).formatted.cmpsize = SWAP_LE32((cdf_header).formatted.cmpsize ); \
    113 (cdf_header).formatted.ucmpsize = SWAP_LE32((cdf_header).formatted.ucmpsize ); \
    114 (cdf_header).formatted.file_name_length = SWAP_LE16((cdf_header).formatted.file_name_length); \
    115 (cdf_header).formatted.extra_field_length = SWAP_LE16((cdf_header).formatted.extra_field_length); \
    116 (cdf_header).formatted.file_comment_length = SWAP_LE16((cdf_header).formatted.file_comment_length); \
    117 IF_DESKTOP( \
    118 (cdf_header).formatted.version_made_by = SWAP_LE16((cdf_header).formatted.version_made_by); \
    119 (cdf_header).formatted.external_file_attributes = SWAP_LE32((cdf_header).formatted.external_file_attributes); \
    120 ) \
    121 } while (0)
    122
    123 #define CDE_HEADER_LEN 16
    124
    125 typedef union {
    126 uint8_t raw[CDE_HEADER_LEN];
    127 struct {
    128 /* uint32_t signature; 50 4b 05 06 */
    129 uint16_t this_disk_no;
    130 uint16_t disk_with_cdf_no;
    131 uint16_t cdf_entries_on_this_disk;
    132 uint16_t cdf_entries_total;
    133 uint32_t cdf_size;
    134 uint32_t cdf_offset;
    135 /* uint16_t file_comment_length; */
    136 /* .ZIP file comment (variable size) */
    137 } formatted PACKED;
    138 } cde_header_t;
    139
    140 struct BUG_cde_header_must_be_16_bytes {
    141 char BUG_cde_header_must_be_16_bytes[
    142 sizeof(cde_header_t) == CDE_HEADER_LEN ? 1 : -1];
    143 };
    144
    145 #define FIX_ENDIANNESS_CDE(cde_header) do { \
    146 (cde_header).formatted.cdf_offset = SWAP_LE32((cde_header).formatted.cdf_offset); \
    147 } while (0)
    148
    149 enum { zip_fd = 3 };
    150
    151
    152 #if ENABLE_DESKTOP
    153
    154 #define PEEK_FROM_END 16384
    155
    156 /* NB: does not preserve file position! */
    157 static uint32_t find_cdf_offset(void)
    158 {
    159 cde_header_t cde_header;
    160 unsigned char *p;
    161 off_t end;
    162 unsigned char *buf = xzalloc(PEEK_FROM_END);
    163
    164 end = xlseek(zip_fd, 0, SEEK_END);
    165 end -= PEEK_FROM_END;
    166 if (end < 0)
    167 end = 0;
    168 xlseek(zip_fd, end, SEEK_SET);
    169 full_read(zip_fd, buf, PEEK_FROM_END);
    170
    171 p = buf;
    172 while (p <= buf + PEEK_FROM_END - CDE_HEADER_LEN - 4) {
    173 if (*p != 'P') {
    174 p++;
    175 continue;
    176 }
    177 if (*++p != 'K')
    178 continue;
    179 if (*++p != 5)
    180 continue;
    181 if (*++p != 6)
    182 continue;
    183 /* we found CDE! */
    184 memcpy(cde_header.raw, p + 1, CDE_HEADER_LEN);
    185 FIX_ENDIANNESS_CDE(cde_header);
    186 free(buf);
    187 return cde_header.formatted.cdf_offset;
    188 }
    189 //free(buf);
    190 bb_error_msg_and_die("can't find file table");
    191 };
    192
    193 static uint32_t read_next_cdf(uint32_t cdf_offset, cdf_header_t *cdf_ptr)
    194 {
    195 off_t org;
    196
    197 org = xlseek(zip_fd, 0, SEEK_CUR);
    198
    199 if (!cdf_offset)
    200 cdf_offset = find_cdf_offset();
    201
    202 xlseek(zip_fd, cdf_offset + 4, SEEK_SET);
    203 xread(zip_fd, cdf_ptr->raw, CDF_HEADER_LEN);
    204 FIX_ENDIANNESS_CDF(*cdf_ptr);
    205 cdf_offset += 4 + CDF_HEADER_LEN
    206 + cdf_ptr->formatted.file_name_length
    207 + cdf_ptr->formatted.extra_field_length
    208 + cdf_ptr->formatted.file_comment_length;
    209
    210 xlseek(zip_fd, org, SEEK_SET);
    211 return cdf_offset;
    212 };
    213 #endif
    214
    215 static void unzip_skip(off_t skip)
    216 {
    217 if (lseek(zip_fd, skip, SEEK_CUR) == (off_t)-1)
    218 bb_copyfd_exact_size(zip_fd, -1, skip);
    219 }
    220
    221 static void unzip_create_leading_dirs(const char *fn)
    222 {
    223 /* Create all leading directories */
    224 char *name = xstrdup(fn);
    225 if (bb_make_directory(dirname(name), 0777, FILEUTILS_RECUR)) {
    226 bb_error_msg_and_die("exiting"); /* bb_make_directory is noisy */
    227 }
    228 free(name);
    229 }
    230
    231 static void unzip_extract(zip_header_t *zip_header, int dst_fd)
    232 {
    233 if (zip_header->formatted.method == 0) {
    234 /* Method 0 - stored (not compressed) */
    235 off_t size = zip_header->formatted.ucmpsize;
    236 if (size)
    237 bb_copyfd_exact_size(zip_fd, dst_fd, size);
    238 } else {
    239 /* Method 8 - inflate */
    240 inflate_unzip_result res;
    241 if (inflate_unzip(&res, zip_header->formatted.cmpsize, zip_fd, dst_fd) < 0)
    242 bb_error_msg_and_die("inflate error");
    243 /* Validate decompression - crc */
    244 if (zip_header->formatted.crc32 != (res.crc ^ 0xffffffffL)) {
    245 bb_error_msg_and_die("crc error");
    246 }
    247 /* Validate decompression - size */
    248 if (zip_header->formatted.ucmpsize != res.bytes_out) {
    249 /* Don't die. Who knows, maybe len calculation
    250 * was botched somewhere. After all, crc matched! */
    251 bb_error_msg("bad length");
    252 }
    253 }
    254 }
    255
    256 int unzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    257 int unzip_main(int argc, char **argv)
    258 {
    259 enum { O_PROMPT, O_NEVER, O_ALWAYS };
    260
    261 zip_header_t zip_header;
    262 smallint quiet = 0;
    263 IF_NOT_DESKTOP(const) smallint verbose = 0;
    264 smallint listing = 0;
    265 smallint overwrite = O_PROMPT;
    266 #if ENABLE_DESKTOP
    267 uint32_t cdf_offset;
    268 #endif
    269 unsigned long total_usize;
    270 unsigned long total_size;
    271 unsigned total_entries;
    272 int dst_fd = -1;
    273 char *src_fn = NULL;
    274 char *dst_fn = NULL;
    275 llist_t *zaccept = NULL;
    276 llist_t *zreject = NULL;
    277 char *base_dir = NULL;
    278 int i, opt;
    279 int opt_range = 0;
    280 char key_buf[80];
    281 struct stat stat_buf;
    282
    283 /* -q, -l and -v: UnZip 5.52 of 28 February 2005, by Info-ZIP:
    284 *
    285 * # /usr/bin/unzip -qq -v decompress_unlzma.i.zip
    286 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
    287 * # /usr/bin/unzip -q -v decompress_unlzma.i.zip
    288 * Length Method Size Ratio Date Time CRC-32 Name
    289 * -------- ------ ------- ----- ---- ---- ------ ----
    290 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
    291 * -------- ------- --- -------
    292 * 204372 35278 83% 1 file
    293 * # /usr/bin/unzip -v decompress_unlzma.i.zip
    294 * Archive: decompress_unlzma.i.zip
    295 * Length Method Size Ratio Date Time CRC-32 Name
    296 * -------- ------ ------- ----- ---- ---- ------ ----
    297 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
    298 * -------- ------- --- -------
    299 * 204372 35278 83% 1 file
    300 * # unzip -v decompress_unlzma.i.zip
    301 * Archive: decompress_unlzma.i.zip
    302 * Length Date Time Name
    303 * -------- ---- ---- ----
    304 * 204372 09-06-09 14:23 decompress_unlzma.i
    305 * -------- -------
    306 * 204372 1 files
    307 * # /usr/bin/unzip -l -qq decompress_unlzma.i.zip
    308 * 204372 09-06-09 14:23 decompress_unlzma.i
    309 * # /usr/bin/unzip -l -q decompress_unlzma.i.zip
    310 * Length Date Time Name
    311 * -------- ---- ---- ----
    312 * 204372 09-06-09 14:23 decompress_unlzma.i
    313 * -------- -------
    314 * 204372 1 file
    315 * # /usr/bin/unzip -l decompress_unlzma.i.zip
    316 * Archive: decompress_unlzma.i.zip
    317 * Length Date Time Name
    318 * -------- ---- ---- ----
    319 * 204372 09-06-09 14:23 decompress_unlzma.i
    320 * -------- -------
    321 * 204372 1 file
    322 */
    323
    324 /* '-' makes getopt return 1 for non-options */
    325 while ((opt = getopt(argc, argv, "-d:lnopqxv")) != -1) {
    326 switch (opt_range) {
    327 case 0: /* Options */
    328 switch (opt) {
    329 case 'l': /* List */
    330 listing = 1;
    331 break;
    332
    333 case 'n': /* Never overwrite existing files */
    334 overwrite = O_NEVER;
    335 break;
    336
    337 case 'o': /* Always overwrite existing files */
    338 overwrite = O_ALWAYS;
    339 break;
    340
    341 case 'p': /* Extract files to stdout and fall through to set verbosity */
    342 dst_fd = STDOUT_FILENO;
    343
    344 case 'q': /* Be quiet */
    345 quiet++;
    346 break;
    347
    348 case 'v': /* Verbose list */
    349 IF_DESKTOP(verbose++;)
    350 listing = 1;
    351 break;
    352
    353 case 1: /* The zip file */
    354 /* +5: space for ".zip" and NUL */
    355 src_fn = xmalloc(strlen(optarg) + 5);
    356 strcpy(src_fn, optarg);
    357 opt_range++;
    358 break;
    359
    360 default:
    361 bb_show_usage();
    362
    363 }
    364 break;
    365
    366 case 1: /* Include files */
    367 if (opt == 1) {
    368 llist_add_to(&zaccept, optarg);
    369 break;
    370 }
    371 if (opt == 'd') {
    372 base_dir = optarg;
    373 opt_range += 2;
    374 break;
    375 }
    376 if (opt == 'x') {
    377 opt_range++;
    378 break;
    379 }
    380 bb_show_usage();
    381
    382 case 2 : /* Exclude files */
    383 if (opt == 1) {
    384 llist_add_to(&zreject, optarg);
    385 break;
    386 }
    387 if (opt == 'd') { /* Extract to base directory */
    388 base_dir = optarg;
    389 opt_range++;
    390 break;
    391 }
    392 /* fall through */
    393
    394 default:
    395 bb_show_usage();
    396 }
    397 }
    398
    399 if (src_fn == NULL) {
    400 bb_show_usage();
    401 }
    402
    403 /* Open input file */
    404 if (LONE_DASH(src_fn)) {
    405 xdup2(STDIN_FILENO, zip_fd);
    406 /* Cannot use prompt mode since zip data is arriving on STDIN */
    407 if (overwrite == O_PROMPT)
    408 overwrite = O_NEVER;
    409 } else {
    410 static const char extn[][5] = {"", ".zip", ".ZIP"};
    411 int orig_src_fn_len = strlen(src_fn);
    412 int src_fd = -1;
    413
    414 for (i = 0; (i < 3) && (src_fd == -1); i++) {
    415 strcpy(src_fn + orig_src_fn_len, extn[i]);
    416 src_fd = open(src_fn, O_RDONLY);
    417 }
    418 if (src_fd == -1) {
    419 src_fn[orig_src_fn_len] = '\0';
    420 bb_error_msg_and_die("can't open %s, %s.zip, %s.ZIP", src_fn, src_fn, src_fn);
    421 }
    422 xmove_fd(src_fd, zip_fd);
    423 }
    424
    425 /* Change dir if necessary */
    426 if (base_dir)
    427 xchdir(base_dir);
    428
    429 if (quiet <= 1) { /* not -qq */
    430 if (quiet == 0)
    431 printf("Archive: %s\n", src_fn);
    432 if (listing) {
    433 puts(verbose ?
    434 " Length Method Size Ratio Date Time CRC-32 Name\n"
    435 "-------- ------ ------- ----- ---- ---- ------ ----"
    436 :
    437 " Length Date Time Name\n"
    438 " -------- ---- ---- ----"
    439 );
    440 }
    441 }
    442
    443 /* Example of an archive with one 0-byte long file named 'z'
    444 * created by Zip 2.31 on Unix:
    445 * 0000 [50 4b]03 04 0a 00 00 00 00 00 42 1a b8 3c 00 00 |PK........B..<..|
    446 * sig........ vneed flags compr mtime mdate crc32>
    447 * 0010 00 00 00 00 00 00 00 00 00 00 01 00 15 00 7a 55 |..............zU|
    448 * >..... csize...... usize...... fnlen exlen fn ex>
    449 * 0020 54 09 00 03 cc d3 f9 4b cc d3 f9 4b 55 78 04 00 |T......K...KUx..|
    450 * >tra_field......................................
    451 * 0030 00 00 00 00[50 4b]01 02 17 03 0a 00 00 00 00 00 |....PK..........|
    452 * ........... sig........ vmade vneed flags compr
    453 * 0040 42 1a b8 3c 00 00 00 00 00 00 00 00 00 00 00 00 |B..<............|
    454 * mtime mdate crc32...... csize...... usize......
    455 * 0050 01 00 0d 00 00 00 00 00 00 00 00 00 a4 81 00 00 |................|
    456 * fnlen exlen clen. dnum. iattr eattr...... relofs> (eattr = rw-r--r--)
    457 * 0060 00 00 7a 55 54 05 00 03 cc d3 f9 4b 55 78 00 00 |..zUT......KUx..|
    458 * >..... fn extra_field...........................
    459 * 0070 [50 4b]05 06 00 00 00 00 01 00 01 00 3c 00 00 00 |PK..........<...|
    460 * 0080 34 00 00 00 00 00 |4.....|
    461 */
    462 total_usize = 0;
    463 total_size = 0;
    464 total_entries = 0;
    465 #if ENABLE_DESKTOP
    466 cdf_offset = 0;
    467 #endif
    468 while (1) {
    469 uint32_t magic;
    470 mode_t dir_mode = 0777;
    471 #if ENABLE_DESKTOP
    472 mode_t file_mode = 0666;
    473 #endif
    474
    475 /* Check magic number */
    476 xread(zip_fd, &magic, 4);
    477 /* Central directory? It's at the end, so exit */
    478 if (magic == ZIP_CDF_MAGIC)
    479 break;
    480 #if ENABLE_DESKTOP
    481 /* Data descriptor? It was a streaming file, go on */
    482 if (magic == ZIP_DD_MAGIC) {
    483 /* skip over duplicate crc32, cmpsize and ucmpsize */
    484 unzip_skip(3 * 4);
    485 continue;
    486 }
    487 #endif
    488 if (magic != ZIP_FILEHEADER_MAGIC)
    489 bb_error_msg_and_die("invalid zip magic %08X", (int)magic);
    490
    491 /* Read the file header */
    492 xread(zip_fd, zip_header.raw, ZIP_HEADER_LEN);
    493 FIX_ENDIANNESS_ZIP(zip_header);
    494 if ((zip_header.formatted.method != 0) && (zip_header.formatted.method != 8)) {
    495 bb_error_msg_and_die("unsupported method %d", zip_header.formatted.method);
    496 }
    497 #if !ENABLE_DESKTOP
    498 if (zip_header.formatted.zip_flags & SWAP_LE16(0x0009)) {
    499 bb_error_msg_and_die("zip flags 1 and 8 are not supported");
    500 }
    501 #else
    502 if (zip_header.formatted.zip_flags & SWAP_LE16(0x0001)) {
    503 /* 0x0001 - encrypted */
    504 bb_error_msg_and_die("zip flag 1 (encryption) is not supported");
    505 }
    506
    507 {
    508 cdf_header_t cdf_header;
    509 cdf_offset = read_next_cdf(cdf_offset, &cdf_header);
    510 if (zip_header.formatted.zip_flags & SWAP_LE16(0x0008)) {
    511 /* 0x0008 - streaming. [u]cmpsize can be reliably gotten
    512 * only from Central Directory. See unzip_doc.txt */
    513 zip_header.formatted.crc32 = cdf_header.formatted.crc32;
    514 zip_header.formatted.cmpsize = cdf_header.formatted.cmpsize;
    515 zip_header.formatted.ucmpsize = cdf_header.formatted.ucmpsize;
    516 }
    517 if ((cdf_header.formatted.version_made_by >> 8) == 3) {
    518 /* this archive is created on Unix */
    519 dir_mode = file_mode = (cdf_header.formatted.external_file_attributes >> 16);
    520 }
    521 }
    522 #endif
    523
    524 /* Read filename */
    525 free(dst_fn);
    526 dst_fn = xzalloc(zip_header.formatted.filename_len + 1);
    527 xread(zip_fd, dst_fn, zip_header.formatted.filename_len);
    528
    529 /* Skip extra header bytes */
    530 unzip_skip(zip_header.formatted.extra_len);
    531
    532 /* Filter zip entries */
    533 if (find_list_entry(zreject, dst_fn)
    534 || (zaccept && !find_list_entry(zaccept, dst_fn))
    535 ) { /* Skip entry */
    536 i = 'n';
    537
    538 } else { /* Extract entry */
    539 if (listing) { /* List entry */
    540 unsigned dostime = zip_header.formatted.modtime | (zip_header.formatted.moddate << 16);
    541 if (!verbose) {
    542 // " Length Date Time Name\n"
    543 // " -------- ---- ---- ----"
    544 printf( "%9u %02u-%02u-%02u %02u:%02u %s\n",
    545 (unsigned)zip_header.formatted.ucmpsize,
    546 (dostime & 0x01e00000) >> 21,
    547 (dostime & 0x001f0000) >> 16,
    548 (((dostime & 0xfe000000) >> 25) + 1980) % 100,
    549 (dostime & 0x0000f800) >> 11,
    550 (dostime & 0x000007e0) >> 5,
    551 dst_fn);
    552 total_usize += zip_header.formatted.ucmpsize;
    553 } else {
    554 unsigned long percents = zip_header.formatted.ucmpsize - zip_header.formatted.cmpsize;
    555 percents = percents * 100;
    556 if (zip_header.formatted.ucmpsize)
    557 percents /= zip_header.formatted.ucmpsize;
    558 // " Length Method Size Ratio Date Time CRC-32 Name\n"
    559 // "-------- ------ ------- ----- ---- ---- ------ ----"
    560 printf( "%8u Defl:N" "%9u%4u%% %02u-%02u-%02u %02u:%02u %08x %s\n",
    561 (unsigned)zip_header.formatted.ucmpsize,
    562 (unsigned)zip_header.formatted.cmpsize,
    563 (unsigned)percents,
    564 (dostime & 0x01e00000) >> 21,
    565 (dostime & 0x001f0000) >> 16,
    566 (((dostime & 0xfe000000) >> 25) + 1980) % 100,
    567 (dostime & 0x0000f800) >> 11,
    568 (dostime & 0x000007e0) >> 5,
    569 zip_header.formatted.crc32,
    570 dst_fn);
    571 total_usize += zip_header.formatted.ucmpsize;
    572 total_size += zip_header.formatted.cmpsize;
    573 }
    574 i = 'n';
    575 } else if (dst_fd == STDOUT_FILENO) { /* Extracting to STDOUT */
    576 i = -1;
    577 } else if (last_char_is(dst_fn, '/')) { /* Extract directory */
    578 if (stat(dst_fn, &stat_buf) == -1) {
    579 if (errno != ENOENT) {
    580 bb_perror_msg_and_die("can't stat '%s'", dst_fn);
    581 }
    582 if (!quiet) {
    583 printf(" creating: %s\n", dst_fn);
    584 }
    585 unzip_create_leading_dirs(dst_fn);
    586 if (bb_make_directory(dst_fn, dir_mode, 0)) {
    587 bb_error_msg_and_die("exiting");
    588 }
    589 } else {
    590 if (!S_ISDIR(stat_buf.st_mode)) {
    591 bb_error_msg_and_die("'%s' exists but is not directory", dst_fn);
    592 }
    593 }
    594 i = 'n';
    595
    596 } else { /* Extract file */
    597 check_file:
    598 if (stat(dst_fn, &stat_buf) == -1) { /* File does not exist */
    599 if (errno != ENOENT) {
    600 bb_perror_msg_and_die("can't stat '%s'", dst_fn);
    601 }
    602 i = 'y';
    603 } else { /* File already exists */
    604 if (overwrite == O_NEVER) {
    605 i = 'n';
    606 } else if (S_ISREG(stat_buf.st_mode)) { /* File is regular file */
    607 if (overwrite == O_ALWAYS) {
    608 i = 'y';
    609 } else {
    610 printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ", dst_fn);
    611 if (!fgets(key_buf, sizeof(key_buf), stdin)) {
    612 bb_perror_msg_and_die("can't read input");
    613 }
    614 i = key_buf[0];
    615 }
    616 } else { /* File is not regular file */
    617 bb_error_msg_and_die("'%s' exists but is not regular file", dst_fn);
    618 }
    619 }
    620 }
    621 }
    622
    623 switch (i) {
    624 case 'A':
    625 overwrite = O_ALWAYS;
    626 case 'y': /* Open file and fall into unzip */
    627 unzip_create_leading_dirs(dst_fn);
    628 #if ENABLE_DESKTOP
    629 dst_fd = xopen3(dst_fn, O_WRONLY | O_CREAT | O_TRUNC, file_mode);
    630 #else
    631 dst_fd = xopen(dst_fn, O_WRONLY | O_CREAT | O_TRUNC);
    632 #endif
    633 case -1: /* Unzip */
    634 if (!quiet) {
    635 printf(" inflating: %s\n", dst_fn);
    636 }
    637 unzip_extract(&zip_header, dst_fd);
    638 if (dst_fd != STDOUT_FILENO) {
    639 /* closing STDOUT is potentially bad for future business */
    640 close(dst_fd);
    641 }
    642 break;
    643
    644 case 'N':
    645 overwrite = O_NEVER;
    646 case 'n':
    647 /* Skip entry data */
    648 unzip_skip(zip_header.formatted.cmpsize);
    649 break;
    650
    651 case 'r':
    652 /* Prompt for new name */
    653 printf("new name: ");
    654 if (!fgets(key_buf, sizeof(key_buf), stdin)) {
    655 bb_perror_msg_and_die("can't read input");
    656 }
    657 free(dst_fn);
    658 dst_fn = xstrdup(key_buf);
    659 chomp(dst_fn);
    660 goto check_file;
    661
    662 default:
    663 printf("error: invalid response [%c]\n", (char)i);
    664 goto check_file;
    665 }
    666
    667 total_entries++;
    668 }
    669
    670 if (listing && quiet <= 1) {
    671 if (!verbose) {
    672 // " Length Date Time Name\n"
    673 // " -------- ---- ---- ----"
    674 printf( " -------- -------\n"
    675 "%9lu" " %u files\n",
    676 total_usize, total_entries);
    677 } else {
    678 unsigned long percents = total_usize - total_size;
    679 percents = percents * 100;
    680 if (total_usize)
    681 percents /= total_usize;
    682 // " Length Method Size Ratio Date Time CRC-32 Name\n"
    683 // "-------- ------ ------- ----- ---- ---- ------ ----"
    684 printf( "-------- ------- --- -------\n"
    685 "%8lu" "%17lu%4u%% %u files\n",
    686 total_usize, total_size, (unsigned)percents,
    687 total_entries);
    688 }
    689 }
    690
    691 return 0;
    692 }