blob: b27dd21871829ca4c14d9f6000a848a6bc7f5dba [file] [log] [blame]
Glenn L McGrath87ac7022002-01-02 13:52:26 +00001/* vi: set sw=4 ts=4: */
2/*
3 * Mini unzip implementation for busybox
4 *
Paul Fox0840b762005-07-20 20:26:49 +00005 * 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.
Glenn L McGrath87ac7022002-01-02 13:52:26 +00009 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +020010 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
Glenn L McGrath87ac7022002-01-02 13:52:26 +000011 */
Glenn L McGrathf34b0e92004-06-06 10:22:43 +000012/* For reference see
Paul Fox0840b762005-07-20 20:26:49 +000013 * http://www.pkware.com/company/standards/appnote/
Glenn L McGrathf34b0e92004-06-06 10:22:43 +000014 * http://www.info-zip.org/pub/infozip/doc/appnote-iz-latest.zip
Denys Vlasenko66620fa2013-11-14 09:53:52 +010015 *
16 * TODO
Paul Fox0840b762005-07-20 20:26:49 +000017 * Zip64 + other methods
Paul Fox0840b762005-07-20 20:26:49 +000018 */
Denys Vlasenkof6beef62013-11-14 11:39:00 +010019//config:config UNZIP
Denys Vlasenkob097a842018-12-28 03:20:17 +010020//config: bool "unzip (26 kb)"
Denys Vlasenkof6beef62013-11-14 11:39:00 +010021//config: default y
22//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020023//config: unzip will list or extract files from a ZIP archive,
24//config: commonly found on DOS/WIN systems. The default behavior
25//config: (with no options) is to extract the archive into the
26//config: current directory.
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +010027//config:
28//config:config FEATURE_UNZIP_CDF
29//config: bool "Read and use Central Directory data"
30//config: default y
31//config: depends on UNZIP
32//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020033//config: If you know that you only need to deal with simple
34//config: ZIP files without deleted/updated files, SFX archives etc,
35//config: you can reduce code size by unselecting this option.
36//config: To support less trivial ZIPs, say Y.
Denys Vlasenko2a0867a2017-01-09 10:58:37 +010037//config:
38//config:config FEATURE_UNZIP_BZIP2
39//config: bool "Support compression method 12 (bzip2)"
40//config: default y
41//config: depends on FEATURE_UNZIP_CDF && DESKTOP
42// FEATURE_UNZIP_CDF is needed, otherwise we can't find start of next file
43// DESKTOP is needed to get back uncompressed length
44//config:
45//config:config FEATURE_UNZIP_LZMA
46//config: bool "Support compression method 14 (lzma)"
47//config: default y
48//config: depends on FEATURE_UNZIP_CDF && DESKTOP
Denys Vlasenko6b4f4b52017-01-09 11:12:01 +010049//config:
50//config:config FEATURE_UNZIP_XZ
51//config: bool "Support compression method 95 (xz)"
52//config: default y
53//config: depends on FEATURE_UNZIP_CDF && DESKTOP
Denys Vlasenkof6beef62013-11-14 11:39:00 +010054
Denys Vlasenkoac216872013-11-14 11:38:18 +010055//applet:IF_UNZIP(APPLET(unzip, BB_DIR_USR_BIN, BB_SUID_DROP))
Denys Vlasenko66620fa2013-11-14 09:53:52 +010056//kbuild:lib-$(CONFIG_UNZIP) += unzip.o
57
Pere Orga1f4447b2011-03-27 22:40:30 +020058//usage:#define unzip_trivial_usage
Denys Vlasenko1f60d882021-06-15 10:00:18 +020059//usage: "[-lnojpq] FILE[.zip] [FILE]... [-x FILE]... [-d DIR]"
Pere Orga1f4447b2011-03-27 22:40:30 +020060//usage:#define unzip_full_usage "\n\n"
Denys Vlasenkoe3e0d2b2012-06-19 12:46:59 +020061//usage: "Extract FILEs from ZIP archive\n"
62//usage: "\n -l List contents (with -q for short form)"
Denys Vlasenkoc5b01012012-06-15 16:43:26 +020063//usage: "\n -n Never overwrite files (default: ask)"
Pere Orga1f4447b2011-03-27 22:40:30 +020064//usage: "\n -o Overwrite"
Denys Vlasenko997ad2c2017-07-20 20:04:49 +020065//usage: "\n -j Do not restore paths"
Denys Vlasenko6b6826f2021-06-13 01:08:48 +020066//usage: "\n -p Write to stdout"
Denys Vlasenkocca4c9f2021-04-14 21:34:00 +020067//usage: "\n -t Test"
Pere Orga1f4447b2011-03-27 22:40:30 +020068//usage: "\n -q Quiet"
Denys Vlasenkoe3e0d2b2012-06-19 12:46:59 +020069//usage: "\n -x FILE Exclude FILEs"
70//usage: "\n -d DIR Extract into DIR"
Pere Orga1f4447b2011-03-27 22:40:30 +020071
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000072#include "libbb.h"
Denys Vlasenkod184a722011-09-22 12:45:14 +020073#include "bb_archive.h"
Glenn L McGrath87ac7022002-01-02 13:52:26 +000074
Denys Vlasenko0ccf52a2016-04-17 21:05:34 +020075#if 0
76# define dbg(...) bb_error_msg(__VA_ARGS__)
77#else
78# define dbg(...) ((void)0)
79#endif
80
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +000081enum {
82#if BB_BIG_ENDIAN
83 ZIP_FILEHEADER_MAGIC = 0x504b0304,
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +010084 ZIP_CDF_MAGIC = 0x504b0102, /* CDF item */
85 ZIP_CDE_MAGIC = 0x504b0506, /* End of CDF */
Denys Vlasenkoafc766f2021-04-14 21:15:25 +020086 ZIP64_CDE_MAGIC = 0x504b0606, /* End of Zip64 CDF */
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +000087 ZIP_DD_MAGIC = 0x504b0708,
88#else
89 ZIP_FILEHEADER_MAGIC = 0x04034b50,
Denys Vlasenko4e8ff732010-05-24 04:33:02 +020090 ZIP_CDF_MAGIC = 0x02014b50,
Denis Vlasenko006e8622008-09-21 01:01:46 +000091 ZIP_CDE_MAGIC = 0x06054b50,
Denys Vlasenkoafc766f2021-04-14 21:15:25 +020092 ZIP64_CDE_MAGIC = 0x06064b50,
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +000093 ZIP_DD_MAGIC = 0x08074b50,
94#endif
95};
Glenn L McGrath7ca04f32002-09-25 02:47:48 +000096
Paul Foxcb981632007-11-05 23:09:03 +000097#define ZIP_HEADER_LEN 26
98
Paul Fox0840b762005-07-20 20:26:49 +000099typedef union {
Paul Foxcb981632007-11-05 23:09:03 +0000100 uint8_t raw[ZIP_HEADER_LEN];
Paul Fox0840b762005-07-20 20:26:49 +0000101 struct {
Denis Vlasenko006e8622008-09-21 01:01:46 +0000102 uint16_t version; /* 0-1 */
Denys Vlasenkoe98884b2010-05-24 04:46:18 +0200103 uint16_t zip_flags; /* 2-3 */
Denis Vlasenko006e8622008-09-21 01:01:46 +0000104 uint16_t method; /* 4-5 */
105 uint16_t modtime; /* 6-7 */
106 uint16_t moddate; /* 8-9 */
107 uint32_t crc32 PACKED; /* 10-13 */
108 uint32_t cmpsize PACKED; /* 14-17 */
109 uint32_t ucmpsize PACKED; /* 18-21 */
110 uint16_t filename_len; /* 22-23 */
111 uint16_t extra_len; /* 24-25 */
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100112 /* filename follows (not NUL terminated) */
113 /* extra field follows */
114 /* data follows */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100115 } fmt PACKED;
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000116} zip_header_t; /* PACKED - gcc 4.2.1 doesn't like it (spews warning) */
Paul Fox0840b762005-07-20 20:26:49 +0000117
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100118#define FIX_ENDIANNESS_ZIP(zip) \
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100119do { if (BB_BIG_ENDIAN) { \
Natanael Copa46f3f162017-07-25 20:44:50 +0200120 (zip).fmt.method = SWAP_LE16((zip).fmt.method ); \
Peter Kaestle7ade4212022-10-25 13:56:48 +0200121 (zip).fmt.modtime = SWAP_LE16((zip).fmt.modtime ); \
122 (zip).fmt.moddate = SWAP_LE16((zip).fmt.moddate ); \
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100123 (zip).fmt.crc32 = SWAP_LE32((zip).fmt.crc32 ); \
124 (zip).fmt.cmpsize = SWAP_LE32((zip).fmt.cmpsize ); \
125 (zip).fmt.ucmpsize = SWAP_LE32((zip).fmt.ucmpsize ); \
126 (zip).fmt.filename_len = SWAP_LE16((zip).fmt.filename_len); \
127 (zip).fmt.extra_len = SWAP_LE16((zip).fmt.extra_len ); \
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100128}} while (0)
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000129
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200130#define CDF_HEADER_LEN 42
Denis Vlasenko006e8622008-09-21 01:01:46 +0000131
132typedef union {
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200133 uint8_t raw[CDF_HEADER_LEN];
Denis Vlasenko006e8622008-09-21 01:01:46 +0000134 struct {
135 /* uint32_t signature; 50 4b 01 02 */
136 uint16_t version_made_by; /* 0-1 */
137 uint16_t version_needed; /* 2-3 */
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200138 uint16_t cdf_flags; /* 4-5 */
Denis Vlasenko006e8622008-09-21 01:01:46 +0000139 uint16_t method; /* 6-7 */
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100140 uint16_t modtime; /* 8-9 */
141 uint16_t moddate; /* 10-11 */
Denis Vlasenko006e8622008-09-21 01:01:46 +0000142 uint32_t crc32; /* 12-15 */
143 uint32_t cmpsize; /* 16-19 */
144 uint32_t ucmpsize; /* 20-23 */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100145 uint16_t filename_len; /* 24-25 */
146 uint16_t extra_len; /* 26-27 */
Denis Vlasenko006e8622008-09-21 01:01:46 +0000147 uint16_t file_comment_length; /* 28-29 */
148 uint16_t disk_number_start; /* 30-31 */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100149 uint16_t internal_attributes; /* 32-33 */
150 uint32_t external_attributes PACKED; /* 34-37 */
Denis Vlasenko006e8622008-09-21 01:01:46 +0000151 uint32_t relative_offset_of_local_header PACKED; /* 38-41 */
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100152 /* filename follows (not NUL terminated) */
153 /* extra field follows */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100154 /* file comment follows */
155 } fmt PACKED;
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200156} cdf_header_t;
Denis Vlasenko006e8622008-09-21 01:01:46 +0000157
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100158#define FIX_ENDIANNESS_CDF(cdf) \
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100159do { if (BB_BIG_ENDIAN) { \
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100160 (cdf).fmt.version_made_by = SWAP_LE16((cdf).fmt.version_made_by); \
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200161 (cdf).fmt.version_needed = SWAP_LE16((cdf).fmt.version_needed ); \
162 (cdf).fmt.method = SWAP_LE16((cdf).fmt.method ); \
163 (cdf).fmt.modtime = SWAP_LE16((cdf).fmt.modtime ); \
164 (cdf).fmt.moddate = SWAP_LE16((cdf).fmt.moddate ); \
165 (cdf).fmt.crc32 = SWAP_LE32((cdf).fmt.crc32 ); \
166 (cdf).fmt.cmpsize = SWAP_LE32((cdf).fmt.cmpsize ); \
167 (cdf).fmt.ucmpsize = SWAP_LE32((cdf).fmt.ucmpsize ); \
168 (cdf).fmt.filename_len = SWAP_LE16((cdf).fmt.filename_len ); \
169 (cdf).fmt.extra_len = SWAP_LE16((cdf).fmt.extra_len ); \
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100170 (cdf).fmt.file_comment_length = SWAP_LE16((cdf).fmt.file_comment_length); \
171 (cdf).fmt.external_attributes = SWAP_LE32((cdf).fmt.external_attributes); \
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100172}} while (0)
Denis Vlasenko006e8622008-09-21 01:01:46 +0000173
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100174#define CDE_LEN 16
Denis Vlasenko006e8622008-09-21 01:01:46 +0000175
176typedef union {
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100177 uint8_t raw[CDE_LEN];
Denis Vlasenko006e8622008-09-21 01:01:46 +0000178 struct {
179 /* uint32_t signature; 50 4b 05 06 */
180 uint16_t this_disk_no;
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200181 uint16_t disk_with_cdf_no;
182 uint16_t cdf_entries_on_this_disk;
183 uint16_t cdf_entries_total;
184 uint32_t cdf_size;
185 uint32_t cdf_offset;
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100186 /* uint16_t archive_comment_length; */
187 /* archive comment follows */
188 } fmt PACKED;
189} cde_t;
Denis Vlasenko006e8622008-09-21 01:01:46 +0000190
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100191#define FIX_ENDIANNESS_CDE(cde) \
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100192do { if (BB_BIG_ENDIAN) { \
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100193 (cde).fmt.cdf_offset = SWAP_LE32((cde).fmt.cdf_offset); \
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100194}} while (0)
195
196struct BUG {
197 /* Check the offset of the last element, not the length. This leniency
198 * allows for poor packing, whereby the overall struct may be too long,
199 * even though the elements are all in the right place.
200 */
201 char BUG_zip_header_must_be_26_bytes[
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100202 offsetof(zip_header_t, fmt.extra_len) + 2
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100203 == ZIP_HEADER_LEN ? 1 : -1];
204 char BUG_cdf_header_must_be_42_bytes[
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100205 offsetof(cdf_header_t, fmt.relative_offset_of_local_header) + 4
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100206 == CDF_HEADER_LEN ? 1 : -1];
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100207 char BUG_cde_must_be_16_bytes[
208 sizeof(cde_t) == CDE_LEN ? 1 : -1];
Denis Vlasenko006e8622008-09-21 01:01:46 +0000209};
210
Denis Vlasenko006e8622008-09-21 01:01:46 +0000211
212enum { zip_fd = 3 };
213
214
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100215/* This value means that we failed to find CDF */
216#define BAD_CDF_OFFSET ((uint32_t)0xffffffff)
Dan Fandrichb76f18d2010-06-17 21:39:44 -0700217
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100218#if !ENABLE_FEATURE_UNZIP_CDF
219
220# define find_cdf_offset() BAD_CDF_OFFSET
221
222#else
Denys Vlasenko5e87e8a2013-07-20 15:20:46 +0200223/* Seen in the wild:
224 * Self-extracting PRO2K3XP_32.exe contains 19078464 byte zip archive,
225 * where CDE was nearly 48 kbytes before EOF.
226 * (Surprisingly, it also apparently has *another* CDE structure
227 * closer to the end, with bogus cdf_offset).
228 * To make extraction work, bumped PEEK_FROM_END from 16k to 64k.
229 */
230#define PEEK_FROM_END (64*1024)
Denis Vlasenko006e8622008-09-21 01:01:46 +0000231/* NB: does not preserve file position! */
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200232static uint32_t find_cdf_offset(void)
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000233{
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100234 cde_t cde;
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100235 unsigned char *buf;
Denis Vlasenko006e8622008-09-21 01:01:46 +0000236 unsigned char *p;
237 off_t end;
Denys Vlasenko0ccf52a2016-04-17 21:05:34 +0200238 uint32_t found;
Denis Vlasenko006e8622008-09-21 01:01:46 +0000239
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100240 end = lseek(zip_fd, 0, SEEK_END);
241 if (end == (off_t) -1)
242 return BAD_CDF_OFFSET;
243
Dan Fandrichb76f18d2010-06-17 21:39:44 -0700244 end -= PEEK_FROM_END;
Denys Vlasenkofc2bb8f2010-05-24 13:07:55 +0200245 if (end < 0)
246 end = 0;
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100247
Denys Vlasenko0ccf52a2016-04-17 21:05:34 +0200248 dbg("Looking for cdf_offset starting from 0x%"OFF_FMT"x", end);
Denys Vlasenko876c1212017-03-24 15:00:12 +0100249 xlseek(zip_fd, end, SEEK_SET);
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100250 buf = xzalloc(PEEK_FROM_END);
Dan Fandrichb76f18d2010-06-17 21:39:44 -0700251 full_read(zip_fd, buf, PEEK_FROM_END);
Denis Vlasenko006e8622008-09-21 01:01:46 +0000252
Denys Vlasenko0ccf52a2016-04-17 21:05:34 +0200253 found = BAD_CDF_OFFSET;
Denis Vlasenko006e8622008-09-21 01:01:46 +0000254 p = buf;
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100255 while (p <= buf + PEEK_FROM_END - CDE_LEN - 4) {
Denis Vlasenko006e8622008-09-21 01:01:46 +0000256 if (*p != 'P') {
257 p++;
258 continue;
259 }
260 if (*++p != 'K')
261 continue;
262 if (*++p != 5)
263 continue;
264 if (*++p != 6)
265 continue;
266 /* we found CDE! */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100267 memcpy(cde.raw, p + 1, CDE_LEN);
Denys Vlasenkoafc766f2021-04-14 21:15:25 +0200268 dbg("cde.this_disk_no:%d", cde.fmt.this_disk_no );
269 dbg("cde.disk_with_cdf_no:%d", cde.fmt.disk_with_cdf_no );
270 dbg("cde.cdf_entries_on_this_disk:%d", cde.fmt.cdf_entries_on_this_disk);
271 dbg("cde.cdf_entries_total:%d", cde.fmt.cdf_entries_total );
272 dbg("cde.cdf_size:%d", cde.fmt.cdf_size );
273 dbg("cde.cdf_offset:%x", cde.fmt.cdf_offset );
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100274 FIX_ENDIANNESS_CDE(cde);
Denys Vlasenko26cd90c2013-07-21 02:31:08 +0200275 /*
276 * I've seen .ZIP files with seemingly valid CDEs
277 * where cdf_offset points past EOF - ??
Denys Vlasenko0ccf52a2016-04-17 21:05:34 +0200278 * This check ignores such CDEs:
Denys Vlasenko26cd90c2013-07-21 02:31:08 +0200279 */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100280 if (cde.fmt.cdf_offset < end + (p - buf)) {
281 found = cde.fmt.cdf_offset;
Denys Vlasenko0ccf52a2016-04-17 21:05:34 +0200282 dbg("Possible cdf_offset:0x%x at 0x%"OFF_FMT"x",
283 (unsigned)found, end + (p-3 - buf));
284 dbg(" cdf_offset+cdf_size:0x%x",
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100285 (unsigned)(found + SWAP_LE32(cde.fmt.cdf_size)));
Denys Vlasenko0ccf52a2016-04-17 21:05:34 +0200286 /*
287 * We do not "break" here because only the last CDE is valid.
288 * I've seen a .zip archive which contained a .zip file,
289 * uncompressed, and taking the first CDE was using
290 * the CDE inside that file!
291 */
292 }
Denis Vlasenko006e8622008-09-21 01:01:46 +0000293 }
Denys Vlasenko26cd90c2013-07-21 02:31:08 +0200294 free(buf);
Denys Vlasenko0ccf52a2016-04-17 21:05:34 +0200295 dbg("Found cdf_offset:0x%x", (unsigned)found);
296 return found;
Denis Vlasenko006e8622008-09-21 01:01:46 +0000297};
298
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100299static uint32_t read_next_cdf(uint32_t cdf_offset, cdf_header_t *cdf)
Denis Vlasenko006e8622008-09-21 01:01:46 +0000300{
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100301 uint32_t magic;
302
303 if (cdf_offset == BAD_CDF_OFFSET)
304 return cdf_offset;
Denis Vlasenko006e8622008-09-21 01:01:46 +0000305
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100306 dbg("Reading CDF at 0x%x", (unsigned)cdf_offset);
307 xlseek(zip_fd, cdf_offset, SEEK_SET);
308 xread(zip_fd, &magic, 4);
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100309 /* Central Directory End? Assume CDF has ended.
310 * (more correct method is to use cde.cdf_entries_total counter)
311 */
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100312 if (magic == ZIP_CDE_MAGIC) {
313 dbg("got ZIP_CDE_MAGIC");
314 return 0; /* EOF */
Denys Vlasenko26cd90c2013-07-21 02:31:08 +0200315 }
Denys Vlasenkoafc766f2021-04-14 21:15:25 +0200316 if (magic == ZIP64_CDE_MAGIC) { /* seen in .zip with >4GB files */
317 dbg("got ZIP64_CDE_MAGIC");
318 return 0; /* EOF */
319 }
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100320 xread(zip_fd, cdf->raw, CDF_HEADER_LEN);
Denis Vlasenko006e8622008-09-21 01:01:46 +0000321
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100322 FIX_ENDIANNESS_CDF(*cdf);
Denys Vlasenkoafc766f2021-04-14 21:15:25 +0200323 dbg(" magic:%08x filename_len:%u extra_len:%u file_comment_length:%u",
324 magic,
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100325 (unsigned)cdf->fmt.filename_len,
326 (unsigned)cdf->fmt.extra_len,
327 (unsigned)cdf->fmt.file_comment_length
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100328 );
Denys Vlasenkoafc766f2021-04-14 21:15:25 +0200329//TODO: require that magic == ZIP_CDF_MAGIC?
330
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100331 cdf_offset += 4 + CDF_HEADER_LEN
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100332 + cdf->fmt.filename_len
333 + cdf->fmt.extra_len
334 + cdf->fmt.file_comment_length;
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100335
Denys Vlasenkoafc766f2021-04-14 21:15:25 +0200336 dbg("Next cdf_offset 0x%x", cdf_offset);
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200337 return cdf_offset;
Denis Vlasenko006e8622008-09-21 01:01:46 +0000338};
339#endif
340
Denys Vlasenkoad37abf2017-07-20 20:21:50 +0200341static void die_if_bad_fnamesize(unsigned sz)
342{
343 if (sz > 0xfff) /* more than 4k?! no funny business please */
James Byrne69374872019-07-02 11:35:03 +0200344 bb_simple_error_msg_and_die("bad archive");
Denys Vlasenkoad37abf2017-07-20 20:21:50 +0200345}
346
Denis Vlasenko006e8622008-09-21 01:01:46 +0000347static void unzip_skip(off_t skip)
348{
Denys Vlasenko26cd90c2013-07-21 02:31:08 +0200349 if (skip != 0)
350 if (lseek(zip_fd, skip, SEEK_CUR) == (off_t)-1)
351 bb_copyfd_exact_size(zip_fd, -1, skip);
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000352}
353
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000354static void unzip_create_leading_dirs(const char *fn)
Paul Fox0840b762005-07-20 20:26:49 +0000355{
356 /* Create all leading directories */
Rob Landleyd921b2e2006-08-03 15:41:12 +0000357 char *name = xstrdup(fn);
Denys Vlasenko5cdd1202018-02-06 17:59:32 +0100358
359 /* mode of -1: set mode according to umask */
360 if (bb_make_directory(dirname(name), -1, FILEUTILS_RECUR)) {
Denys Vlasenko831756b2011-09-09 17:30:55 +0200361 xfunc_die(); /* bb_make_directory is noisy */
Paul Fox0840b762005-07-20 20:26:49 +0000362 }
363 free(name);
364}
365
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200366#if ENABLE_FEATURE_UNZIP_CDF
Denys Vlasenkoa84db182018-02-20 15:57:45 +0100367static void unzip_extract_symlink(llist_t **symlink_placeholders,
368 zip_header_t *zip,
369 const char *dst_fn)
Denys Vlasenko13ae85e2017-07-20 18:34:51 +0200370{
371 char *target;
372
Denys Vlasenkoad37abf2017-07-20 20:21:50 +0200373 die_if_bad_fnamesize(zip->fmt.ucmpsize);
Denys Vlasenko13ae85e2017-07-20 18:34:51 +0200374
375 if (zip->fmt.method == 0) {
376 /* Method 0 - stored (not compressed) */
377 target = xzalloc(zip->fmt.ucmpsize + 1);
378 xread(zip_fd, target, zip->fmt.ucmpsize);
379 } else {
380#if 1
James Byrne69374872019-07-02 11:35:03 +0200381 bb_simple_error_msg_and_die("compressed symlink is not supported");
Denys Vlasenko13ae85e2017-07-20 18:34:51 +0200382#else
383 transformer_state_t xstate;
384 init_transformer_state(&xstate);
385 xstate.mem_output_size_max = zip->fmt.ucmpsize;
386 /* ...unpack... */
387 if (!xstate.mem_output_buf)
388 WTF();
389 target = xstate.mem_output_buf;
390 target = xrealloc(target, xstate.mem_output_size + 1);
391 target[xstate.mem_output_size] = '\0';
392#endif
393 }
Harald van Dijk8c24af92018-05-22 17:34:31 +0200394 create_or_remember_link(symlink_placeholders,
Denys Vlasenkoa84db182018-02-20 15:57:45 +0100395 target,
Harald van Dijk8c24af92018-05-22 17:34:31 +0200396 dst_fn,
397 0);
Denys Vlasenko13ae85e2017-07-20 18:34:51 +0200398 free(target);
399}
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200400#endif
Denys Vlasenko13ae85e2017-07-20 18:34:51 +0200401
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100402static void unzip_extract(zip_header_t *zip, int dst_fd)
Paul Fox0840b762005-07-20 20:26:49 +0000403{
Denys Vlasenko2a0867a2017-01-09 10:58:37 +0100404 transformer_state_t xstate;
405
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100406 if (zip->fmt.method == 0) {
Paul Fox0840b762005-07-20 20:26:49 +0000407 /* Method 0 - stored (not compressed) */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100408 off_t size = zip->fmt.ucmpsize;
Denis Vlasenko714701c2006-12-22 00:21:07 +0000409 if (size)
Denis Vlasenko006e8622008-09-21 01:01:46 +0000410 bb_copyfd_exact_size(zip_fd, dst_fd, size);
Denys Vlasenko2a0867a2017-01-09 10:58:37 +0100411 return;
412 }
413
414 init_transformer_state(&xstate);
415 xstate.bytes_in = zip->fmt.cmpsize;
416 xstate.src_fd = zip_fd;
417 xstate.dst_fd = dst_fd;
418 if (zip->fmt.method == 8) {
Paul Fox0840b762005-07-20 20:26:49 +0000419 /* Method 8 - inflate */
Denys Vlasenkob4c11c12014-12-07 00:44:00 +0100420 if (inflate_unzip(&xstate) < 0)
James Byrne69374872019-07-02 11:35:03 +0200421 bb_simple_error_msg_and_die("inflate error");
Paul Fox0840b762005-07-20 20:26:49 +0000422 /* Validate decompression - crc */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100423 if (zip->fmt.crc32 != (xstate.crc32 ^ 0xffffffffL)) {
James Byrne69374872019-07-02 11:35:03 +0200424 bb_simple_error_msg_and_die("crc error");
Paul Fox0840b762005-07-20 20:26:49 +0000425 }
Paul Fox0840b762005-07-20 20:26:49 +0000426 }
Denys Vlasenko2a0867a2017-01-09 10:58:37 +0100427#if ENABLE_FEATURE_UNZIP_BZIP2
428 else if (zip->fmt.method == 12) {
429 /* Tested. Unpacker reads too much, but we use CDF
430 * and will seek to the correct beginning of next file.
431 */
432 xstate.bytes_out = unpack_bz2_stream(&xstate);
433 if (xstate.bytes_out < 0)
James Byrne69374872019-07-02 11:35:03 +0200434 bb_simple_error_msg_and_die("inflate error");
Denys Vlasenko2a0867a2017-01-09 10:58:37 +0100435 }
436#endif
437#if ENABLE_FEATURE_UNZIP_LZMA
438 else if (zip->fmt.method == 14) {
439 /* Not tested yet */
440 xstate.bytes_out = unpack_lzma_stream(&xstate);
441 if (xstate.bytes_out < 0)
James Byrne69374872019-07-02 11:35:03 +0200442 bb_simple_error_msg_and_die("inflate error");
Denys Vlasenko2a0867a2017-01-09 10:58:37 +0100443 }
444#endif
Denys Vlasenko6b4f4b52017-01-09 11:12:01 +0100445#if ENABLE_FEATURE_UNZIP_XZ
446 else if (zip->fmt.method == 95) {
447 /* Not tested yet */
448 xstate.bytes_out = unpack_xz_stream(&xstate);
449 if (xstate.bytes_out < 0)
James Byrne69374872019-07-02 11:35:03 +0200450 bb_simple_error_msg_and_die("inflate error");
Denys Vlasenko6b4f4b52017-01-09 11:12:01 +0100451 }
452#endif
Denys Vlasenko2a0867a2017-01-09 10:58:37 +0100453 else {
454 bb_error_msg_and_die("unsupported method %u", zip->fmt.method);
455 }
456
457 /* Validate decompression - size */
Denys Vlasenkoafc766f2021-04-14 21:15:25 +0200458 if (zip->fmt.ucmpsize != 0xffffffff /* seen on files with >4GB uncompressed data */
459 && zip->fmt.ucmpsize != xstate.bytes_out
460 ) {
Denys Vlasenko2a0867a2017-01-09 10:58:37 +0100461 /* Don't die. Who knows, maybe len calculation
462 * was botched somewhere. After all, crc matched! */
James Byrne69374872019-07-02 11:35:03 +0200463 bb_simple_error_msg("bad length");
Denys Vlasenko2a0867a2017-01-09 10:58:37 +0100464 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000465}
466
Denys Vlasenkobf998072013-01-22 11:16:08 +0100467static void my_fgets80(char *buf80)
468{
469 fflush_all();
470 if (!fgets(buf80, 80, stdin)) {
James Byrne69374872019-07-02 11:35:03 +0200471 bb_simple_perror_msg_and_die("can't read standard input");
Denys Vlasenkobf998072013-01-22 11:16:08 +0100472 }
473}
474
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200475static int get_lstat_mode(const char *dst_fn)
476{
477 struct stat stat_buf;
478 if (lstat(dst_fn, &stat_buf) == -1) {
479 if (errno != ENOENT) {
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200480 bb_perror_msg_and_die("can't stat '%s'",
481 dst_fn
482 );
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200483 }
484 /* File does not exist */
485 return -1;
486 }
487 return stat_buf.st_mode;
488}
489
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +0000490int unzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Rob Landleydfba7412006-03-06 20:47:33 +0000491int unzip_main(int argc, char **argv)
Glenn L McGrath87ac7022002-01-02 13:52:26 +0000492{
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200493 enum {
494 OPT_l = (1 << 0),
495 OPT_x = (1 << 1),
496 OPT_j = (1 << 2),
497 };
498 unsigned opts;
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200499 smallint quiet = 0;
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100500 IF_NOT_FEATURE_UNZIP_CDF(const) smallint verbose = 0;
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200501 enum { O_PROMPT, O_NEVER, O_ALWAYS };
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000502 smallint overwrite = O_PROMPT;
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200503 uint32_t cdf_offset;
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200504 unsigned long total_usize;
505 unsigned long total_size;
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000506 unsigned total_entries;
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000507 int dst_fd = -1;
508 char *src_fn = NULL;
509 char *dst_fn = NULL;
Mike Frysinger69024552005-07-30 07:30:26 +0000510 llist_t *zaccept = NULL;
511 llist_t *zreject = NULL;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000512 char *base_dir = NULL;
Denys Vlasenkoa84db182018-02-20 15:57:45 +0100513#if ENABLE_FEATURE_UNZIP_CDF
514 llist_t *symlink_placeholders = NULL;
515#endif
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200516 int i;
Denys Vlasenkobf998072013-01-22 11:16:08 +0100517 char key_buf[80]; /* must match size used by my_fgets80 */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000518
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200519/* -q, -l and -v: UnZip 5.52 of 28 February 2005, by Info-ZIP:
520 *
521 * # /usr/bin/unzip -qq -v decompress_unlzma.i.zip
522 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
523 * # /usr/bin/unzip -q -v decompress_unlzma.i.zip
524 * Length Method Size Ratio Date Time CRC-32 Name
525 * -------- ------ ------- ----- ---- ---- ------ ----
526 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
527 * -------- ------- --- -------
528 * 204372 35278 83% 1 file
529 * # /usr/bin/unzip -v decompress_unlzma.i.zip
530 * Archive: decompress_unlzma.i.zip
531 * Length Method Size Ratio Date Time CRC-32 Name
532 * -------- ------ ------- ----- ---- ---- ------ ----
533 * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
534 * -------- ------- --- -------
535 * 204372 35278 83% 1 file
536 * # unzip -v decompress_unlzma.i.zip
537 * Archive: decompress_unlzma.i.zip
538 * Length Date Time Name
539 * -------- ---- ---- ----
540 * 204372 09-06-09 14:23 decompress_unlzma.i
541 * -------- -------
542 * 204372 1 files
543 * # /usr/bin/unzip -l -qq decompress_unlzma.i.zip
544 * 204372 09-06-09 14:23 decompress_unlzma.i
545 * # /usr/bin/unzip -l -q decompress_unlzma.i.zip
546 * Length Date Time Name
547 * -------- ---- ---- ----
548 * 204372 09-06-09 14:23 decompress_unlzma.i
549 * -------- -------
550 * 204372 1 file
551 * # /usr/bin/unzip -l decompress_unlzma.i.zip
552 * Archive: decompress_unlzma.i.zip
553 * Length Date Time Name
554 * -------- ---- ---- ----
555 * 204372 09-06-09 14:23 decompress_unlzma.i
556 * -------- -------
557 * 204372 1 file
558 */
559
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200560 opts = 0;
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000561 /* '-' makes getopt return 1 for non-options */
Denys Vlasenkocca4c9f2021-04-14 21:34:00 +0200562 while ((i = getopt(argc, argv, "-d:lnotpqxjv")) != -1) {
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200563 switch (i) {
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200564 case 'd': /* Extract to base directory */
565 base_dir = optarg;
566 break;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000567
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200568 case 'l': /* List */
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200569 opts |= OPT_l;
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200570 break;
Paul Fox0840b762005-07-20 20:26:49 +0000571
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200572 case 'n': /* Never overwrite existing files */
573 overwrite = O_NEVER;
574 break;
Paul Fox0840b762005-07-20 20:26:49 +0000575
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200576 case 'o': /* Always overwrite existing files */
577 overwrite = O_ALWAYS;
578 break;
Paul Fox0840b762005-07-20 20:26:49 +0000579
Denys Vlasenkocca4c9f2021-04-14 21:34:00 +0200580 case 't': /* Extract files to /dev/null */
581 xmove_fd(xopen("/dev/null", O_WRONLY), STDOUT_FILENO);
582 /*fallthrough*/
583
584 case 'p': /* Extract files to stdout */
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200585 dst_fd = STDOUT_FILENO;
Denys Vlasenkocca4c9f2021-04-14 21:34:00 +0200586 /*fallthrough*/
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200587
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200588 case 'q': /* Be quiet */
589 quiet++;
590 break;
Paul Fox0840b762005-07-20 20:26:49 +0000591
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200592 case 'v': /* Verbose list */
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100593 IF_FEATURE_UNZIP_CDF(verbose++;)
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200594 opts |= OPT_l;
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200595 break;
596
597 case 'x':
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200598 opts |= OPT_x;
599 break;
600
601 case 'j':
602 opts |= OPT_j;
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200603 break;
604
605 case 1:
606 if (!src_fn) {
607 /* The zip file */
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000608 /* +5: space for ".zip" and NUL */
609 src_fn = xmalloc(strlen(optarg) + 5);
Denis Vlasenko666c40c2007-03-31 10:17:24 +0000610 strcpy(src_fn, optarg);
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200611 } else if (!(opts & OPT_x)) {
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200612 /* Include files */
613 llist_add_to(&zaccept, optarg);
614 } else {
615 /* Exclude files */
616 llist_add_to(&zreject, optarg);
Paul Fox0840b762005-07-20 20:26:49 +0000617 }
618 break;
619
Paul Fox0840b762005-07-20 20:26:49 +0000620 default:
621 bb_show_usage();
Glenn L McGrath87ac7022002-01-02 13:52:26 +0000622 }
623 }
624
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200625#ifndef __GLIBC__
626 /*
627 * This code is needed for non-GNU getopt
628 * which doesn't understand "-" in option string.
629 * The -x option won't work properly in this case:
630 * "unzip a.zip q -x w e" will be interpreted as
631 * "unzip a.zip q w e -x" = "unzip a.zip q w e"
632 */
633 argv += optind;
634 if (argv[0]) {
635 /* +5: space for ".zip" and NUL */
636 src_fn = xmalloc(strlen(argv[0]) + 5);
637 strcpy(src_fn, argv[0]);
638 while (*++argv)
639 llist_add_to(&zaccept, *argv);
640 }
641#endif
642
643 if (!src_fn) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000644 bb_show_usage();
Glenn L McGrath87ac7022002-01-02 13:52:26 +0000645 }
646
Paul Fox0840b762005-07-20 20:26:49 +0000647 /* Open input file */
Denis Vlasenko9f739442006-12-16 23:49:13 +0000648 if (LONE_DASH(src_fn)) {
Denis Vlasenko006e8622008-09-21 01:01:46 +0000649 xdup2(STDIN_FILENO, zip_fd);
Paul Fox0840b762005-07-20 20:26:49 +0000650 /* Cannot use prompt mode since zip data is arriving on STDIN */
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000651 if (overwrite == O_PROMPT)
652 overwrite = O_NEVER;
Glenn L McGrath237ae422002-11-03 14:05:15 +0000653 } else {
Denys Vlasenko3e134eb2016-04-22 18:09:21 +0200654 static const char extn[][5] ALIGN1 = { ".zip", ".ZIP" };
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200655 char *ext = src_fn + strlen(src_fn);
656 int src_fd;
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000657
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200658 i = 0;
659 for (;;) {
Paul Fox0840b762005-07-20 20:26:49 +0000660 src_fd = open(src_fn, O_RDONLY);
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200661 if (src_fd >= 0)
662 break;
663 if (++i > 2) {
664 *ext = '\0';
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200665 bb_error_msg_and_die("can't open %s[.zip]",
666 src_fn
667 );
Denys Vlasenkoc5b01012012-06-15 16:43:26 +0200668 }
669 strcpy(ext, extn[i - 1]);
Paul Fox0840b762005-07-20 20:26:49 +0000670 }
Denis Vlasenko006e8622008-09-21 01:01:46 +0000671 xmove_fd(src_fd, zip_fd);
Glenn L McGrath237ae422002-11-03 14:05:15 +0000672 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000673
Paul Fox0840b762005-07-20 20:26:49 +0000674 /* Change dir if necessary */
Lauri Kasanenb9943742020-04-15 15:01:44 +0300675 if (base_dir) {
676 /* -p DIR: try to create, errors don't matter.
677 * UnZip 6.00 does no multi-level mkdir (-p DIR1/DIR2 syntax),
678 * not using bb_make_directory() here (yet?)
679 */
680 mkdir(base_dir, 0777);
Rob Landleyd921b2e2006-08-03 15:41:12 +0000681 xchdir(base_dir);
Lauri Kasanenb9943742020-04-15 15:01:44 +0300682 }
Glenn L McGrath87ac7022002-01-02 13:52:26 +0000683
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200684 if (quiet <= 1) { /* not -qq */
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200685 if (quiet == 0) {
686 printf("Archive: %s\n",
687 printable_string(src_fn)
688 );
689 }
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200690 if (opts & OPT_l) {
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200691 puts(verbose ?
Denys Vlasenko07bd9792016-04-18 01:43:24 +0200692 " Length Method Size Cmpr Date Time CRC-32 Name\n"
693 "-------- ------ ------- ---- ---------- ----- -------- ----"
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200694 :
Denys Vlasenko07bd9792016-04-18 01:43:24 +0200695 " Length Date Time Name\n"
696 "--------- ---------- ----- ----"
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200697 );
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000698 }
699 }
Glenn L McGrath87ac7022002-01-02 13:52:26 +0000700
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200701/* Example of an archive with one 0-byte long file named 'z'
702 * created by Zip 2.31 on Unix:
703 * 0000 [50 4b]03 04 0a 00 00 00 00 00 42 1a b8 3c 00 00 |PK........B..<..|
704 * sig........ vneed flags compr mtime mdate crc32>
705 * 0010 00 00 00 00 00 00 00 00 00 00 01 00 15 00 7a 55 |..............zU|
706 * >..... csize...... usize...... fnlen exlen fn ex>
707 * 0020 54 09 00 03 cc d3 f9 4b cc d3 f9 4b 55 78 04 00 |T......K...KUx..|
708 * >tra_field......................................
709 * 0030 00 00 00 00[50 4b]01 02 17 03 0a 00 00 00 00 00 |....PK..........|
710 * ........... sig........ vmade vneed flags compr
711 * 0040 42 1a b8 3c 00 00 00 00 00 00 00 00 00 00 00 00 |B..<............|
712 * mtime mdate crc32...... csize...... usize......
713 * 0050 01 00 0d 00 00 00 00 00 00 00 00 00 a4 81 00 00 |................|
714 * fnlen exlen clen. dnum. iattr eattr...... relofs> (eattr = rw-r--r--)
715 * 0060 00 00 7a 55 54 05 00 03 cc d3 f9 4b 55 78 00 00 |..zUT......KUx..|
716 * >..... fn extra_field...........................
717 * 0070 [50 4b]05 06 00 00 00 00 01 00 01 00 3c 00 00 00 |PK..........<...|
718 * 0080 34 00 00 00 00 00 |4.....|
719 */
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200720 total_usize = 0;
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000721 total_size = 0;
722 total_entries = 0;
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100723 cdf_offset = find_cdf_offset(); /* try to seek to the end, find CDE and CDF start */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000724 while (1) {
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100725 zip_header_t zip;
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200726 mode_t dir_mode = 0777;
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100727#if ENABLE_FEATURE_UNZIP_CDF
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200728 mode_t file_mode = 0666;
729#endif
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000730
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100731 if (!ENABLE_FEATURE_UNZIP_CDF || cdf_offset == BAD_CDF_OFFSET) {
732 /* Normally happens when input is unseekable.
733 *
734 * Valid ZIP file has Central Directory at the end
735 * with central directory file headers (CDFs).
736 * After it, there is a Central Directory End structure.
737 * CDFs identify what files are in the ZIP and where
738 * they are located. This allows ZIP readers to load
739 * the list of files without reading the entire ZIP archive.
740 * ZIP files may be appended to, only files specified in
741 * the CD are valid. Scanning for local file headers is
742 * not a correct algorithm.
743 *
744 * We try to do the above, and resort to "linear" reading
745 * of ZIP file only if seek failed or CDE wasn't found.
746 */
747 uint32_t magic;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000748
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100749 /* Check magic number */
750 xread(zip_fd, &magic, 4);
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100751 /* CDF item? Assume there are no more files, exit */
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100752 if (magic == ZIP_CDF_MAGIC) {
753 dbg("got ZIP_CDF_MAGIC");
754 break;
755 }
756 /* Data descriptor? It was a streaming file, go on */
757 if (magic == ZIP_DD_MAGIC) {
758 dbg("got ZIP_DD_MAGIC");
759 /* skip over duplicate crc32, cmpsize and ucmpsize */
760 unzip_skip(3 * 4);
761 continue;
762 }
763 if (magic != ZIP_FILEHEADER_MAGIC)
764 bb_error_msg_and_die("invalid zip magic %08X", (int)magic);
765 dbg("got ZIP_FILEHEADER_MAGIC");
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200766
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100767 xread(zip_fd, zip.raw, ZIP_HEADER_LEN);
768 FIX_ENDIANNESS_ZIP(zip);
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100769 if (zip.fmt.zip_flags & SWAP_LE16(0x0008)) {
770 bb_error_msg_and_die("zip flag %s is not supported",
771 "8 (streaming)");
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100772 }
773 }
774#if ENABLE_FEATURE_UNZIP_CDF
775 else {
776 /* cdf_offset is valid (and we know the file is seekable) */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100777 cdf_header_t cdf;
778 cdf_offset = read_next_cdf(cdf_offset, &cdf);
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100779 if (cdf_offset == 0) /* EOF? */
780 break;
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100781# if 1
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100782 xlseek(zip_fd,
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100783 SWAP_LE32(cdf.fmt.relative_offset_of_local_header) + 4,
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100784 SEEK_SET);
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100785 xread(zip_fd, zip.raw, ZIP_HEADER_LEN);
786 FIX_ENDIANNESS_ZIP(zip);
787 if (zip.fmt.zip_flags & SWAP_LE16(0x0008)) {
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200788 /* 0x0008 - streaming. [u]cmpsize can be reliably gotten
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100789 * only from Central Directory.
Denys Vlasenko26cd90c2013-07-21 02:31:08 +0200790 */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100791 zip.fmt.crc32 = cdf.fmt.crc32;
792 zip.fmt.cmpsize = cdf.fmt.cmpsize;
793 zip.fmt.ucmpsize = cdf.fmt.ucmpsize;
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200794 }
Denys Vlasenko38d96692017-07-11 22:10:52 +0200795// Seen in some zipfiles: central directory 9 byte extra field contains
796// a subfield with ID 0x5455 and 5 data bytes, which is a Unix-style UTC mtime.
797// Local header version:
798// u16 0x5455 ("UT")
799// u16 size (1 + 4 * n)
800// u8 flags: bit 0:mtime is present, bit 1:atime is present, bit 2:ctime is present
801// u32 mtime
802// u32 atime
803// u32 ctime
804// Central header version:
805// u16 0x5455 ("UT")
806// u16 size (5 (or 1?))
807// u8 flags: bit 0:mtime is present, bit 1:atime is present, bit 2:ctime is present
808// u32 mtime (CDF does not store atime/ctime)
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100809# else
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100810 /* CDF has the same data as local header, no need to read the latter...
811 * ...not really. An archive was seen with cdf.extra_len == 6 but
812 * zip.extra_len == 0.
813 */
814 memcpy(&zip.fmt.version,
815 &cdf.fmt.version_needed, ZIP_HEADER_LEN);
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100816 xlseek(zip_fd,
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100817 SWAP_LE32(cdf.fmt.relative_offset_of_local_header) + 4 + ZIP_HEADER_LEN,
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100818 SEEK_SET);
819# endif
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100820 if ((cdf.fmt.version_made_by >> 8) == 3) {
Denys Vlasenko26cd90c2013-07-21 02:31:08 +0200821 /* This archive is created on Unix */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100822 dir_mode = file_mode = (cdf.fmt.external_attributes >> 16);
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200823 }
Denis Vlasenko48a99712008-07-26 17:32:41 +0000824 }
Denis Vlasenko006e8622008-09-21 01:01:46 +0000825#endif
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100826
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100827 if (zip.fmt.zip_flags & SWAP_LE16(0x0001)) {
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100828 /* 0x0001 - encrypted */
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100829 bb_error_msg_and_die("zip flag %s is not supported",
830 "1 (encryption)");
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100831 }
Denys Vlasenkobca4dee2016-04-18 01:14:05 +0200832 dbg("File cmpsize:0x%x extra_len:0x%x ucmpsize:0x%x",
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100833 (unsigned)zip.fmt.cmpsize,
834 (unsigned)zip.fmt.extra_len,
835 (unsigned)zip.fmt.ucmpsize
Denys Vlasenkobca4dee2016-04-18 01:14:05 +0200836 );
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000837
838 /* Read filename */
Paul Fox0840b762005-07-20 20:26:49 +0000839 free(dst_fn);
Denys Vlasenkoad37abf2017-07-20 20:21:50 +0200840 die_if_bad_fnamesize(zip.fmt.filename_len);
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100841 dst_fn = xzalloc(zip.fmt.filename_len + 1);
842 xread(zip_fd, dst_fn, zip.fmt.filename_len);
Paul Fox0840b762005-07-20 20:26:49 +0000843 /* Skip extra header bytes */
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100844 unzip_skip(zip.fmt.extra_len);
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000845
Denys Vlasenko8c06bc62015-02-10 01:30:43 +0100846 /* Guard against "/abspath", "/../" and similar attacks */
847 overlapping_strcpy(dst_fn, strip_unsafe_prefix(dst_fn));
848
Paul Fox0840b762005-07-20 20:26:49 +0000849 /* Filter zip entries */
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000850 if (find_list_entry(zreject, dst_fn)
851 || (zaccept && !find_list_entry(zaccept, dst_fn))
852 ) { /* Skip entry */
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100853 goto skip_cmpsize;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000854 }
855
Denys Vlasenko997ad2c2017-07-20 20:04:49 +0200856 if (opts & OPT_l) {
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100857 /* List entry */
858 char dtbuf[sizeof("mm-dd-yyyy hh:mm")];
859 sprintf(dtbuf, "%02u-%02u-%04u %02u:%02u",
860 (zip.fmt.moddate >> 5) & 0xf, // mm: 0x01e0
861 (zip.fmt.moddate) & 0x1f, // dd: 0x001f
862 (zip.fmt.moddate >> 9) + 1980, // yy: 0xfe00
863 (zip.fmt.modtime >> 11), // hh: 0xf800
864 (zip.fmt.modtime >> 5) & 0x3f // mm: 0x07e0
865 // seconds/2 not shown, encoded in -- 0x001f
866 );
867 if (!verbose) {
868 // " Length Date Time Name\n"
869 // "--------- ---------- ----- ----"
870 printf( "%9u " "%s " "%s\n",
871 (unsigned)zip.fmt.ucmpsize,
872 dtbuf,
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200873 printable_string(dst_fn)
874 );
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100875 } else {
876 char method6[7];
877 unsigned long percents;
878
879 sprintf(method6, "%6u", zip.fmt.method);
880 if (zip.fmt.method == 0) {
881 strcpy(method6, "Stored");
882 }
883 if (zip.fmt.method == 8) {
884 strcpy(method6, "Defl:N");
885 /* normal, maximum, fast, superfast */
886 IF_DESKTOP(method6[5] = "NXFS"[(zip.fmt.zip_flags >> 1) & 3];)
887 }
888 percents = zip.fmt.ucmpsize - zip.fmt.cmpsize;
889 if ((int32_t)percents < 0)
890 percents = 0; /* happens if ucmpsize < cmpsize */
891 percents = percents * 100;
892 if (zip.fmt.ucmpsize)
893 percents /= zip.fmt.ucmpsize;
894 // " Length Method Size Cmpr Date Time CRC-32 Name\n"
895 // "-------- ------ ------- ---- ---------- ----- -------- ----"
896 printf( "%8u %s" "%9u%4u%% " "%s " "%08x " "%s\n",
897 (unsigned)zip.fmt.ucmpsize,
898 method6,
899 (unsigned)zip.fmt.cmpsize,
900 (unsigned)percents,
901 dtbuf,
902 zip.fmt.crc32,
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200903 printable_string(dst_fn)
904 );
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100905 total_size += zip.fmt.cmpsize;
906 }
907 total_usize += zip.fmt.ucmpsize;
908 goto skip_cmpsize;
909 }
910
911 if (dst_fd == STDOUT_FILENO) {
912 /* Extracting to STDOUT */
913 goto do_extract;
914 }
Eugene Rudoyc6f213a2017-11-07 08:03:36 +0100915
916 /* Strip paths (after -l: unzip -lj a.zip lists full names) */
917 if (opts & OPT_j)
918 overlapping_strcpy(dst_fn, bb_basename(dst_fn));
919 /* Did this strip everything ("DIR/" case)? Then skip */
920 if (!dst_fn[0])
921 goto skip_cmpsize;
922
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100923 if (last_char_is(dst_fn, '/')) {
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200924 int mode;
925
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100926 /* Extract directory */
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200927 mode = get_lstat_mode(dst_fn);
928 if (mode == -1) { /* ENOENT */
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100929 if (!quiet) {
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200930 printf(" creating: %s\n", printable_string(dst_fn));
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100931 }
932 unzip_create_leading_dirs(dst_fn);
933 if (bb_make_directory(dst_fn, dir_mode, FILEUTILS_IGNORE_CHMOD_ERR)) {
934 xfunc_die();
935 }
936 } else {
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200937 if (!S_ISDIR(mode)) {
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100938 bb_error_msg_and_die("'%s' exists but is not a %s",
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200939 printable_string(dst_fn),
940 "directory"
941 );
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100942 }
943 }
944 goto skip_cmpsize;
945 }
946 check_file:
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200947 /* Does target file already exist? */
948 {
949 int mode = get_lstat_mode(dst_fn);
950 if (mode == -1) {
951 /* ENOENT: does not exist */
952 goto do_open_and_extract;
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100953 }
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200954 if (overwrite == O_NEVER) {
955 goto skip_cmpsize;
956 }
957 if (!S_ISREG(mode)) {
958 fishy:
959 bb_error_msg_and_die("'%s' exists but is not a %s",
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200960 printable_string(dst_fn),
961 "regular file"
962 );
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200963 }
964 if (overwrite == O_ALWAYS) {
965 goto do_open_and_extract;
966 }
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200967 printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ",
968 printable_string(dst_fn)
969 );
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200970 my_fgets80(key_buf);
971 /* User input could take a long time. Is it still a regular file? */
972 mode = get_lstat_mode(dst_fn);
973 if (!S_ISREG(mode))
974 goto fishy;
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100975 }
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100976
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200977 /* Extract (or skip) it */
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100978 switch (key_buf[0]) {
Paul Fox0840b762005-07-20 20:26:49 +0000979 case 'A':
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +0000980 overwrite = O_ALWAYS;
Paul Fox0840b762005-07-20 20:26:49 +0000981 case 'y': /* Open file and fall into unzip */
Denys Vlasenko8c1d8572017-01-09 13:10:10 +0100982 do_open_and_extract:
Paul Fox0840b762005-07-20 20:26:49 +0000983 unzip_create_leading_dirs(dst_fn);
Denys Vlasenkoe3c4db82017-01-05 11:43:53 +0100984#if ENABLE_FEATURE_UNZIP_CDF
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200985 dst_fd = -1;
986 if (!S_ISLNK(file_mode)) {
987 dst_fd = xopen3(dst_fn,
988 O_WRONLY | O_CREAT | O_TRUNC | O_NOFOLLOW,
989 file_mode);
990 }
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200991#else
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +0200992 /* O_NOFOLLOW defends against symlink attacks */
993 dst_fd = xopen(dst_fn, O_WRONLY | O_CREAT | O_TRUNC | O_NOFOLLOW);
Denys Vlasenko4e8ff732010-05-24 04:33:02 +0200994#endif
Denys Vlasenko386bc9f2009-09-06 16:52:50 +0200995 if (!quiet) {
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +0100996 printf(/* zip.fmt.method == 0
997 ? " extracting: %s\n"
Denys Vlasenko349d72c2018-09-30 16:56:56 +0200998 : */ " inflating: %s\n",
999 printable_string(dst_fn)
1000 );
Paul Fox0840b762005-07-20 20:26:49 +00001001 }
Denys Vlasenkocca4c9f2021-04-14 21:34:00 +02001002 do_extract:
Denys Vlasenko13ae85e2017-07-20 18:34:51 +02001003#if ENABLE_FEATURE_UNZIP_CDF
1004 if (S_ISLNK(file_mode)) {
Denys Vlasenkobff9bbc2017-07-20 18:56:05 +02001005 if (dst_fd != STDOUT_FILENO) /* not -p? */
Denys Vlasenkoa84db182018-02-20 15:57:45 +01001006 unzip_extract_symlink(&symlink_placeholders, &zip, dst_fn);
Denys Vlasenko13ae85e2017-07-20 18:34:51 +02001007 } else
1008#endif
1009 {
1010 unzip_extract(&zip, dst_fd);
1011 if (dst_fd != STDOUT_FILENO) {
1012 /* closing STDOUT is potentially bad for future business */
1013 close(dst_fd);
1014 }
Paul Fox0840b762005-07-20 20:26:49 +00001015 }
1016 break;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +00001017
Paul Fox0840b762005-07-20 20:26:49 +00001018 case 'N':
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +00001019 overwrite = O_NEVER;
Denys Vlasenko8c1d8572017-01-09 13:10:10 +01001020 case 'n': /* Skip entry data */
1021 skip_cmpsize:
Denys Vlasenko0ffac1c2017-01-08 14:14:19 +01001022 unzip_skip(zip.fmt.cmpsize);
Paul Fox0840b762005-07-20 20:26:49 +00001023 break;
1024
1025 case 'r':
1026 /* Prompt for new name */
1027 printf("new name: ");
Denys Vlasenkobf998072013-01-22 11:16:08 +01001028 my_fgets80(key_buf);
Paul Fox0840b762005-07-20 20:26:49 +00001029 free(dst_fn);
Rob Landleyd921b2e2006-08-03 15:41:12 +00001030 dst_fn = xstrdup(key_buf);
Paul Fox0840b762005-07-20 20:26:49 +00001031 chomp(dst_fn);
Denis Vlasenko48a99712008-07-26 17:32:41 +00001032 goto check_file;
Paul Fox0840b762005-07-20 20:26:49 +00001033
1034 default:
Denys Vlasenko8c1d8572017-01-09 13:10:10 +01001035 printf("error: invalid response [%c]\n", (char)key_buf[0]);
Denis Vlasenko48a99712008-07-26 17:32:41 +00001036 goto check_file;
Paul Fox0840b762005-07-20 20:26:49 +00001037 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +00001038
Denis Vlasenko006e8622008-09-21 01:01:46 +00001039 total_entries++;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +00001040 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +00001041
Denys Vlasenkoa84db182018-02-20 15:57:45 +01001042#if ENABLE_FEATURE_UNZIP_CDF
Harald van Dijk8c24af92018-05-22 17:34:31 +02001043 create_links_from_list(symlink_placeholders);
Denys Vlasenkoa84db182018-02-20 15:57:45 +01001044#endif
1045
Denys Vlasenko997ad2c2017-07-20 20:04:49 +02001046 if ((opts & OPT_l) && quiet <= 1) {
Denys Vlasenko386bc9f2009-09-06 16:52:50 +02001047 if (!verbose) {
Denys Vlasenko07bd9792016-04-18 01:43:24 +02001048 // " Length Date Time Name\n"
1049 // "--------- ---------- ----- ----"
1050 printf( " --------%21s" "-------\n"
1051 "%9lu%21s" "%u files\n",
1052 "",
1053 total_usize, "", total_entries);
Denys Vlasenko386bc9f2009-09-06 16:52:50 +02001054 } else {
1055 unsigned long percents = total_usize - total_size;
Denys Vlasenko07bd9792016-04-18 01:43:24 +02001056 if ((long)percents < 0)
1057 percents = 0; /* happens if usize < size */
Denys Vlasenko386bc9f2009-09-06 16:52:50 +02001058 percents = percents * 100;
1059 if (total_usize)
1060 percents /= total_usize;
Denys Vlasenko07bd9792016-04-18 01:43:24 +02001061 // " Length Method Size Cmpr Date Time CRC-32 Name\n"
1062 // "-------- ------ ------- ---- ---------- ----- -------- ----"
1063 printf( "-------- ------- ----%28s" "----\n"
1064 "%8lu" "%17lu%4u%%%28s" "%u files\n",
1065 "",
1066 total_usize, total_size, (unsigned)percents, "",
Denys Vlasenko386bc9f2009-09-06 16:52:50 +02001067 total_entries);
1068 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +00001069 }
1070
Denis Vlasenkobc7c5d02007-10-18 23:27:46 +00001071 return 0;
Glenn L McGrath87ac7022002-01-02 13:52:26 +00001072}