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

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    Revision 984 - (show annotations) (download)
    Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
    File MIME type: text/plain
    File size: 19781 byte(s) 
    -updated to busybox-1.16.1 and enabled blkid/uuid support in default config
    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_CDS_MAGIC = 0x504b0102,
    29 ZIP_CDE_MAGIC = 0x504b0506,
    30 ZIP_DD_MAGIC = 0x504b0708,
    31 #else
    32 ZIP_FILEHEADER_MAGIC = 0x04034b50,
    33 ZIP_CDS_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 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.flags = SWAP_LE16((zip_header).formatted.flags ); \
    70 (zip_header).formatted.method = SWAP_LE16((zip_header).formatted.method ); \
    71 (zip_header).formatted.modtime = SWAP_LE16((zip_header).formatted.modtime ); \
    72 (zip_header).formatted.moddate = SWAP_LE16((zip_header).formatted.moddate ); \
    73 (zip_header).formatted.crc32 = SWAP_LE32((zip_header).formatted.crc32 ); \
    74 (zip_header).formatted.cmpsize = SWAP_LE32((zip_header).formatted.cmpsize ); \
    75 (zip_header).formatted.ucmpsize = SWAP_LE32((zip_header).formatted.ucmpsize ); \
    76 (zip_header).formatted.filename_len = SWAP_LE16((zip_header).formatted.filename_len); \
    77 (zip_header).formatted.extra_len = SWAP_LE16((zip_header).formatted.extra_len ); \
    78 } while (0)
    79
    80 #define CDS_HEADER_LEN 42
    81
    82 typedef union {
    83 uint8_t raw[CDS_HEADER_LEN];
    84 struct {
    85 /* uint32_t signature; 50 4b 01 02 */
    86 uint16_t version_made_by; /* 0-1 */
    87 uint16_t version_needed; /* 2-3 */
    88 uint16_t cds_flags; /* 4-5 */
    89 uint16_t method; /* 6-7 */
    90 uint16_t mtime; /* 8-9 */
    91 uint16_t mdate; /* 10-11 */
    92 uint32_t crc32; /* 12-15 */
    93 uint32_t cmpsize; /* 16-19 */
    94 uint32_t ucmpsize; /* 20-23 */
    95 uint16_t file_name_length; /* 24-25 */
    96 uint16_t extra_field_length; /* 26-27 */
    97 uint16_t file_comment_length; /* 28-29 */
    98 uint16_t disk_number_start; /* 30-31 */
    99 uint16_t internal_file_attributes; /* 32-33 */
    100 uint32_t external_file_attributes PACKED; /* 34-37 */
    101 uint32_t relative_offset_of_local_header PACKED; /* 38-41 */
    102 } formatted PACKED;
    103 } cds_header_t;
    104
    105 struct BUG_cds_header_must_be_42_bytes {
    106 char BUG_cds_header_must_be_42_bytes[
    107 offsetof(cds_header_t, formatted.relative_offset_of_local_header) + 4
    108 == CDS_HEADER_LEN ? 1 : -1];
    109 };
    110
    111 #define FIX_ENDIANNESS_CDS(cds_header) do { \
    112 (cds_header).formatted.crc32 = SWAP_LE32((cds_header).formatted.crc32 ); \
    113 (cds_header).formatted.cmpsize = SWAP_LE32((cds_header).formatted.cmpsize ); \
    114 (cds_header).formatted.ucmpsize = SWAP_LE32((cds_header).formatted.ucmpsize ); \
    115 (cds_header).formatted.file_name_length = SWAP_LE16((cds_header).formatted.file_name_length); \
    116 (cds_header).formatted.extra_field_length = SWAP_LE16((cds_header).formatted.extra_field_length); \
    117 (cds_header).formatted.file_comment_length = SWAP_LE16((cds_header).formatted.file_comment_length); \
    118 } while (0)
    119
    120 #define CDE_HEADER_LEN 16
    121
    122 typedef union {
    123 uint8_t raw[CDE_HEADER_LEN];
    124 struct {
    125 /* uint32_t signature; 50 4b 05 06 */
    126 uint16_t this_disk_no;
    127 uint16_t disk_with_cds_no;
    128 uint16_t cds_entries_on_this_disk;
    129 uint16_t cds_entries_total;
    130 uint32_t cds_size;
    131 uint32_t cds_offset;
    132 /* uint16_t file_comment_length; */
    133 /* .ZIP file comment (variable size) */
    134 } formatted PACKED;
    135 } cde_header_t;
    136
    137 struct BUG_cde_header_must_be_16_bytes {
    138 char BUG_cde_header_must_be_16_bytes[
    139 sizeof(cde_header_t) == CDE_HEADER_LEN ? 1 : -1];
    140 };
    141
    142 #define FIX_ENDIANNESS_CDE(cde_header) do { \
    143 (cde_header).formatted.cds_offset = SWAP_LE32((cde_header).formatted.cds_offset); \
    144 } while (0)
    145
    146 enum { zip_fd = 3 };
    147
    148
    149 #if ENABLE_DESKTOP
    150 /* NB: does not preserve file position! */
    151 static uint32_t find_cds_offset(void)
    152 {
    153 unsigned char buf[1024];
    154 cde_header_t cde_header;
    155 unsigned char *p;
    156 off_t end;
    157
    158 end = xlseek(zip_fd, 0, SEEK_END);
    159 if (end < 1024)
    160 end = 1024;
    161 end -= 1024;
    162 xlseek(zip_fd, end, SEEK_SET);
    163 full_read(zip_fd, buf, 1024);
    164
    165 p = buf;
    166 while (p <= buf + 1024 - CDE_HEADER_LEN - 4) {
    167 if (*p != 'P') {
    168 p++;
    169 continue;
    170 }
    171 if (*++p != 'K')
    172 continue;
    173 if (*++p != 5)
    174 continue;
    175 if (*++p != 6)
    176 continue;
    177 /* we found CDE! */
    178 memcpy(cde_header.raw, p + 1, CDE_HEADER_LEN);
    179 FIX_ENDIANNESS_CDE(cde_header);
    180 return cde_header.formatted.cds_offset;
    181 }
    182 bb_error_msg_and_die("can't find file table");
    183 };
    184
    185 static uint32_t read_next_cds(int count_m1, uint32_t cds_offset, cds_header_t *cds_ptr)
    186 {
    187 off_t org;
    188
    189 org = xlseek(zip_fd, 0, SEEK_CUR);
    190
    191 if (!cds_offset)
    192 cds_offset = find_cds_offset();
    193
    194 while (count_m1-- >= 0) {
    195 xlseek(zip_fd, cds_offset + 4, SEEK_SET);
    196 xread(zip_fd, cds_ptr->raw, CDS_HEADER_LEN);
    197 FIX_ENDIANNESS_CDS(*cds_ptr);
    198 cds_offset += 4 + CDS_HEADER_LEN
    199 + cds_ptr->formatted.file_name_length
    200 + cds_ptr->formatted.extra_field_length
    201 + cds_ptr->formatted.file_comment_length;
    202 }
    203
    204 xlseek(zip_fd, org, SEEK_SET);
    205 return cds_offset;
    206 };
    207 #endif
    208
    209 static void unzip_skip(off_t skip)
    210 {
    211 if (lseek(zip_fd, skip, SEEK_CUR) == (off_t)-1)
    212 bb_copyfd_exact_size(zip_fd, -1, skip);
    213 }
    214
    215 static void unzip_create_leading_dirs(const char *fn)
    216 {
    217 /* Create all leading directories */
    218 char *name = xstrdup(fn);
    219 if (bb_make_directory(dirname(name), 0777, FILEUTILS_RECUR)) {
    220 bb_error_msg_and_die("exiting"); /* bb_make_directory is noisy */
    221 }
    222 free(name);
    223 }
    224
    225 static void unzip_extract(zip_header_t *zip_header, int dst_fd)
    226 {
    227 if (zip_header->formatted.method == 0) {
    228 /* Method 0 - stored (not compressed) */
    229 off_t size = zip_header->formatted.ucmpsize;
    230 if (size)
    231 bb_copyfd_exact_size(zip_fd, dst_fd, size);
    232 } else {
    233 /* Method 8 - inflate */
    234 inflate_unzip_result res;
    235 if (inflate_unzip(&res, zip_header->formatted.cmpsize, zip_fd, dst_fd) < 0)
    236 bb_error_msg_and_die("inflate error");
    237 /* Validate decompression - crc */
    238 if (zip_header->formatted.crc32 != (res.crc ^ 0xffffffffL)) {
    239 bb_error_msg_and_die("crc error");
    240 }
    241 /* Validate decompression - size */
    242 if (zip_header->formatted.ucmpsize != res.bytes_out) {
    243 /* Don't die. Who knows, maybe len calculation
    244 * was botched somewhere. After all, crc matched! */
    245 bb_error_msg("bad length");
    246 }
    247 }
    248 }
    249
    250 int unzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    251 int unzip_main(int argc, char **argv)
    252 {
    253 enum { O_PROMPT, O_NEVER, O_ALWAYS };
    254
    255 zip_header_t zip_header;
    256 smallint quiet = 0;
    257 IF_NOT_DESKTOP(const) smallint verbose = 0;
    258 smallint listing = 0;
    259 smallint overwrite = O_PROMPT;
    260 #if ENABLE_DESKTOP
    261 uint32_t cds_offset;
    262 unsigned cds_entries;
    263 #endif
    264 unsigned long total_usize;
    265 unsigned long total_size;
    266 unsigned total_entries;
    267 int dst_fd = -1;
    268 char *src_fn = NULL;
    269 char *dst_fn = NULL;
    270 llist_t *zaccept = NULL;
    271 llist_t *zreject = NULL;
    272 char *base_dir = NULL;
    273 int i, opt;
    274 int opt_range = 0;
    275 char key_buf[80];
    276 struct stat stat_buf;
    277
    278 /* -q, -l and -v: UnZip 5.52 of 28 February 2005, by Info-ZIP:
    279 *
    280 * # /usr/bin/unzip -qq -v decompress_unlzma.i.zip
    281 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
    282 * # /usr/bin/unzip -q -v decompress_unlzma.i.zip
    283 * Length Method Size Ratio Date Time CRC-32 Name
    284 * -------- ------ ------- ----- ---- ---- ------ ----
    285 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
    286 * -------- ------- --- -------
    287 * 204372 35278 83% 1 file
    288 * # /usr/bin/unzip -v decompress_unlzma.i.zip
    289 * Archive: decompress_unlzma.i.zip
    290 * Length Method Size Ratio Date Time CRC-32 Name
    291 * -------- ------ ------- ----- ---- ---- ------ ----
    292 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
    293 * -------- ------- --- -------
    294 * 204372 35278 83% 1 file
    295 * # unzip -v decompress_unlzma.i.zip
    296 * Archive: decompress_unlzma.i.zip
    297 * Length Date Time Name
    298 * -------- ---- ---- ----
    299 * 204372 09-06-09 14:23 decompress_unlzma.i
    300 * -------- -------
    301 * 204372 1 files
    302 * # /usr/bin/unzip -l -qq decompress_unlzma.i.zip
    303 * 204372 09-06-09 14:23 decompress_unlzma.i
    304 * # /usr/bin/unzip -l -q decompress_unlzma.i.zip
    305 * Length Date Time Name
    306 * -------- ---- ---- ----
    307 * 204372 09-06-09 14:23 decompress_unlzma.i
    308 * -------- -------
    309 * 204372 1 file
    310 * # /usr/bin/unzip -l decompress_unlzma.i.zip
    311 * Archive: decompress_unlzma.i.zip
    312 * Length Date Time Name
    313 * -------- ---- ---- ----
    314 * 204372 09-06-09 14:23 decompress_unlzma.i
    315 * -------- -------
    316 * 204372 1 file
    317 */
    318
    319 /* '-' makes getopt return 1 for non-options */
    320 while ((opt = getopt(argc, argv, "-d:lnopqxv")) != -1) {
    321 switch (opt_range) {
    322 case 0: /* Options */
    323 switch (opt) {
    324 case 'l': /* List */
    325 listing = 1;
    326 break;
    327
    328 case 'n': /* Never overwrite existing files */
    329 overwrite = O_NEVER;
    330 break;
    331
    332 case 'o': /* Always overwrite existing files */
    333 overwrite = O_ALWAYS;
    334 break;
    335
    336 case 'p': /* Extract files to stdout and fall through to set verbosity */
    337 dst_fd = STDOUT_FILENO;
    338
    339 case 'q': /* Be quiet */
    340 quiet++;
    341 break;
    342
    343 case 'v': /* Verbose list */
    344 IF_DESKTOP(verbose++;)
    345 listing = 1;
    346 break;
    347
    348 case 1: /* The zip file */
    349 /* +5: space for ".zip" and NUL */
    350 src_fn = xmalloc(strlen(optarg) + 5);
    351 strcpy(src_fn, optarg);
    352 opt_range++;
    353 break;
    354
    355 default:
    356 bb_show_usage();
    357
    358 }
    359 break;
    360
    361 case 1: /* Include files */
    362 if (opt == 1) {
    363 llist_add_to(&zaccept, optarg);
    364 break;
    365 }
    366 if (opt == 'd') {
    367 base_dir = optarg;
    368 opt_range += 2;
    369 break;
    370 }
    371 if (opt == 'x') {
    372 opt_range++;
    373 break;
    374 }
    375 bb_show_usage();
    376
    377 case 2 : /* Exclude files */
    378 if (opt == 1) {
    379 llist_add_to(&zreject, optarg);
    380 break;
    381 }
    382 if (opt == 'd') { /* Extract to base directory */
    383 base_dir = optarg;
    384 opt_range++;
    385 break;
    386 }
    387 /* fall through */
    388
    389 default:
    390 bb_show_usage();
    391 }
    392 }
    393
    394 if (src_fn == NULL) {
    395 bb_show_usage();
    396 }
    397
    398 /* Open input file */
    399 if (LONE_DASH(src_fn)) {
    400 xdup2(STDIN_FILENO, zip_fd);
    401 /* Cannot use prompt mode since zip data is arriving on STDIN */
    402 if (overwrite == O_PROMPT)
    403 overwrite = O_NEVER;
    404 } else {
    405 static const char extn[][5] = {"", ".zip", ".ZIP"};
    406 int orig_src_fn_len = strlen(src_fn);
    407 int src_fd = -1;
    408
    409 for (i = 0; (i < 3) && (src_fd == -1); i++) {
    410 strcpy(src_fn + orig_src_fn_len, extn[i]);
    411 src_fd = open(src_fn, O_RDONLY);
    412 }
    413 if (src_fd == -1) {
    414 src_fn[orig_src_fn_len] = '\0';
    415 bb_error_msg_and_die("can't open %s, %s.zip, %s.ZIP", src_fn, src_fn, src_fn);
    416 }
    417 xmove_fd(src_fd, zip_fd);
    418 }
    419
    420 /* Change dir if necessary */
    421 if (base_dir)
    422 xchdir(base_dir);
    423
    424 if (quiet <= 1) { /* not -qq */
    425 if (quiet == 0)
    426 printf("Archive: %s\n", src_fn);
    427 if (listing) {
    428 puts(verbose ?
    429 " Length Method Size Ratio Date Time CRC-32 Name\n"
    430 "-------- ------ ------- ----- ---- ---- ------ ----"
    431 :
    432 " Length Date Time Name\n"
    433 " -------- ---- ---- ----"
    434 );
    435 }
    436 }
    437
    438 total_usize = 0;
    439 total_size = 0;
    440 total_entries = 0;
    441 #if ENABLE_DESKTOP
    442 cds_entries = 0;
    443 cds_offset = 0;
    444 #endif
    445 while (1) {
    446 uint32_t magic;
    447
    448 /* Check magic number */
    449 xread(zip_fd, &magic, 4);
    450 /* Central directory? It's at the end, so exit */
    451 if (magic == ZIP_CDS_MAGIC)
    452 break;
    453 #if ENABLE_DESKTOP
    454 /* Data descriptor? It was a streaming file, go on */
    455 if (magic == ZIP_DD_MAGIC) {
    456 /* skip over duplicate crc32, cmpsize and ucmpsize */
    457 unzip_skip(3 * 4);
    458 continue;
    459 }
    460 #endif
    461 if (magic != ZIP_FILEHEADER_MAGIC)
    462 bb_error_msg_and_die("invalid zip magic %08X", (int)magic);
    463
    464 /* Read the file header */
    465 xread(zip_fd, zip_header.raw, ZIP_HEADER_LEN);
    466 FIX_ENDIANNESS_ZIP(zip_header);
    467 if ((zip_header.formatted.method != 0) && (zip_header.formatted.method != 8)) {
    468 bb_error_msg_and_die("unsupported method %d", zip_header.formatted.method);
    469 }
    470 #if !ENABLE_DESKTOP
    471 if (zip_header.formatted.flags & 0x0009) {
    472 bb_error_msg_and_die("zip flags 1 and 8 are not supported");
    473 }
    474 #else
    475 if (zip_header.formatted.flags & 0x0001) {
    476 /* 0x0001 - encrypted */
    477 bb_error_msg_and_die("zip flag 1 (encryption) is not supported");
    478 }
    479 if (zip_header.formatted.flags & 0x0008) {
    480 cds_header_t cds_header;
    481 /* 0x0008 - streaming. [u]cmpsize can be reliably gotten
    482 * only from Central Directory. See unzip_doc.txt */
    483 cds_offset = read_next_cds(total_entries - cds_entries, cds_offset, &cds_header);
    484 cds_entries = total_entries + 1;
    485 zip_header.formatted.crc32 = cds_header.formatted.crc32;
    486 zip_header.formatted.cmpsize = cds_header.formatted.cmpsize;
    487 zip_header.formatted.ucmpsize = cds_header.formatted.ucmpsize;
    488 }
    489 #endif
    490
    491 /* Read filename */
    492 free(dst_fn);
    493 dst_fn = xzalloc(zip_header.formatted.filename_len + 1);
    494 xread(zip_fd, dst_fn, zip_header.formatted.filename_len);
    495
    496 /* Skip extra header bytes */
    497 unzip_skip(zip_header.formatted.extra_len);
    498
    499 /* Filter zip entries */
    500 if (find_list_entry(zreject, dst_fn)
    501 || (zaccept && !find_list_entry(zaccept, dst_fn))
    502 ) { /* Skip entry */
    503 i = 'n';
    504
    505 } else { /* Extract entry */
    506 if (listing) { /* List entry */
    507 unsigned dostime = zip_header.formatted.modtime | (zip_header.formatted.moddate << 16);
    508 if (!verbose) {
    509 // " Length Date Time Name\n"
    510 // " -------- ---- ---- ----"
    511 printf( "%9u %02u-%02u-%02u %02u:%02u %s\n",
    512 (unsigned)zip_header.formatted.ucmpsize,
    513 (dostime & 0x01e00000) >> 21,
    514 (dostime & 0x001f0000) >> 16,
    515 (((dostime & 0xfe000000) >> 25) + 1980) % 100,
    516 (dostime & 0x0000f800) >> 11,
    517 (dostime & 0x000007e0) >> 5,
    518 dst_fn);
    519 total_usize += zip_header.formatted.ucmpsize;
    520 } else {
    521 unsigned long percents = zip_header.formatted.ucmpsize - zip_header.formatted.cmpsize;
    522 percents = percents * 100;
    523 if (zip_header.formatted.ucmpsize)
    524 percents /= zip_header.formatted.ucmpsize;
    525 // " Length Method Size Ratio Date Time CRC-32 Name\n"
    526 // "-------- ------ ------- ----- ---- ---- ------ ----"
    527 printf( "%8u Defl:N" "%9u%4u%% %02u-%02u-%02u %02u:%02u %08x %s\n",
    528 (unsigned)zip_header.formatted.ucmpsize,
    529 (unsigned)zip_header.formatted.cmpsize,
    530 (unsigned)percents,
    531 (dostime & 0x01e00000) >> 21,
    532 (dostime & 0x001f0000) >> 16,
    533 (((dostime & 0xfe000000) >> 25) + 1980) % 100,
    534 (dostime & 0x0000f800) >> 11,
    535 (dostime & 0x000007e0) >> 5,
    536 zip_header.formatted.crc32,
    537 dst_fn);
    538 total_usize += zip_header.formatted.ucmpsize;
    539 total_size += zip_header.formatted.cmpsize;
    540 }
    541 i = 'n';
    542 } else if (dst_fd == STDOUT_FILENO) { /* Extracting to STDOUT */
    543 i = -1;
    544 } else if (last_char_is(dst_fn, '/')) { /* Extract directory */
    545 if (stat(dst_fn, &stat_buf) == -1) {
    546 if (errno != ENOENT) {
    547 bb_perror_msg_and_die("can't stat '%s'", dst_fn);
    548 }
    549 if (!quiet) {
    550 printf(" creating: %s\n", dst_fn);
    551 }
    552 unzip_create_leading_dirs(dst_fn);
    553 if (bb_make_directory(dst_fn, 0777, 0)) {
    554 bb_error_msg_and_die("exiting");
    555 }
    556 } else {
    557 if (!S_ISDIR(stat_buf.st_mode)) {
    558 bb_error_msg_and_die("'%s' exists but is not directory", dst_fn);
    559 }
    560 }
    561 i = 'n';
    562
    563 } else { /* Extract file */
    564 check_file:
    565 if (stat(dst_fn, &stat_buf) == -1) { /* File does not exist */
    566 if (errno != ENOENT) {
    567 bb_perror_msg_and_die("can't stat '%s'", dst_fn);
    568 }
    569 i = 'y';
    570 } else { /* File already exists */
    571 if (overwrite == O_NEVER) {
    572 i = 'n';
    573 } else if (S_ISREG(stat_buf.st_mode)) { /* File is regular file */
    574 if (overwrite == O_ALWAYS) {
    575 i = 'y';
    576 } else {
    577 printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ", dst_fn);
    578 if (!fgets(key_buf, sizeof(key_buf), stdin)) {
    579 bb_perror_msg_and_die("can't read input");
    580 }
    581 i = key_buf[0];
    582 }
    583 } else { /* File is not regular file */
    584 bb_error_msg_and_die("'%s' exists but is not regular file", dst_fn);
    585 }
    586 }
    587 }
    588 }
    589
    590 switch (i) {
    591 case 'A':
    592 overwrite = O_ALWAYS;
    593 case 'y': /* Open file and fall into unzip */
    594 unzip_create_leading_dirs(dst_fn);
    595 dst_fd = xopen(dst_fn, O_WRONLY | O_CREAT | O_TRUNC);
    596 case -1: /* Unzip */
    597 if (!quiet) {
    598 printf(" inflating: %s\n", dst_fn);
    599 }
    600 unzip_extract(&zip_header, dst_fd);
    601 if (dst_fd != STDOUT_FILENO) {
    602 /* closing STDOUT is potentially bad for future business */
    603 close(dst_fd);
    604 }
    605 break;
    606
    607 case 'N':
    608 overwrite = O_NEVER;
    609 case 'n':
    610 /* Skip entry data */
    611 unzip_skip(zip_header.formatted.cmpsize);
    612 break;
    613
    614 case 'r':
    615 /* Prompt for new name */
    616 printf("new name: ");
    617 if (!fgets(key_buf, sizeof(key_buf), stdin)) {
    618 bb_perror_msg_and_die("can't read input");
    619 }
    620 free(dst_fn);
    621 dst_fn = xstrdup(key_buf);
    622 chomp(dst_fn);
    623 goto check_file;
    624
    625 default:
    626 printf("error: invalid response [%c]\n", (char)i);
    627 goto check_file;
    628 }
    629
    630 total_entries++;
    631 }
    632
    633 if (listing && quiet <= 1) {
    634 if (!verbose) {
    635 // " Length Date Time Name\n"
    636 // " -------- ---- ---- ----"
    637 printf( " -------- -------\n"
    638 "%9lu" " %u files\n",
    639 total_usize, total_entries);
    640 } else {
    641 unsigned long percents = total_usize - total_size;
    642 percents = percents * 100;
    643 if (total_usize)
    644 percents /= total_usize;
    645 // " Length Method Size Ratio Date Time CRC-32 Name\n"
    646 // "-------- ------ ------- ----- ---- ---- ------ ----"
    647 printf( "-------- ------- --- -------\n"
    648 "%8lu" "%17lu%4u%% %u files\n",
    649 total_usize, total_size, (unsigned)percents,
    650 total_entries);
    651 }
    652 }
    653
    654 return 0;
    655 }