[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini unzip implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2004 by Ed Clark
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| 6 | *
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| 7 | * Loosely based on original busybox unzip applet by Laurence Anderson.
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| 8 | * All options and features should work in this version.
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| 9 | *
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[2725] | 10 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[821] | 11 | */
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| 12 |
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| 13 | /* For reference see
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| 14 | * http://www.pkware.com/company/standards/appnote/
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| 15 | * http://www.info-zip.org/pub/infozip/doc/appnote-iz-latest.zip
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| 16 | */
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| 17 |
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| 18 | /* TODO
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| 19 | * Zip64 + other methods
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| 20 | */
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| 21 |
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[3232] | 22 | //usage:#define unzip_trivial_usage
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| 23 | //usage: "[-lnopq] FILE[.zip] [FILE]... [-x FILE...] [-d DIR]"
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| 24 | //usage:#define unzip_full_usage "\n\n"
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| 25 | //usage: "Extract FILEs from ZIP archive\n"
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| 26 | //usage: "\n -l List contents (with -q for short form)"
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| 27 | //usage: "\n -n Never overwrite files (default: ask)"
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| 28 | //usage: "\n -o Overwrite"
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| 29 | //usage: "\n -p Print to stdout"
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| 30 | //usage: "\n -q Quiet"
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| 31 | //usage: "\n -x FILE Exclude FILEs"
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| 32 | //usage: "\n -d DIR Extract into DIR"
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| 33 |
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[1765] | 34 | #include "libbb.h"
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[3232] | 35 | #include "bb_archive.h"
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[821] | 36 |
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[2725] | 37 | enum {
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| 38 | #if BB_BIG_ENDIAN
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| 39 | ZIP_FILEHEADER_MAGIC = 0x504b0304,
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| 40 | ZIP_CDF_MAGIC = 0x504b0102, /* central directory's file header */
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| 41 | ZIP_CDE_MAGIC = 0x504b0506, /* "end of central directory" record */
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| 42 | ZIP_DD_MAGIC = 0x504b0708,
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| 43 | #else
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| 44 | ZIP_FILEHEADER_MAGIC = 0x04034b50,
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| 45 | ZIP_CDF_MAGIC = 0x02014b50,
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| 46 | ZIP_CDE_MAGIC = 0x06054b50,
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| 47 | ZIP_DD_MAGIC = 0x08074b50,
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| 48 | #endif
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| 49 | };
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[821] | 50 |
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[2725] | 51 | #define ZIP_HEADER_LEN 26
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| 52 |
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[821] | 53 | typedef union {
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[2725] | 54 | uint8_t raw[ZIP_HEADER_LEN];
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[821] | 55 | struct {
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[2725] | 56 | uint16_t version; /* 0-1 */
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| 57 | uint16_t zip_flags; /* 2-3 */
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| 58 | uint16_t method; /* 4-5 */
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| 59 | uint16_t modtime; /* 6-7 */
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| 60 | uint16_t moddate; /* 8-9 */
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| 61 | uint32_t crc32 PACKED; /* 10-13 */
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| 62 | uint32_t cmpsize PACKED; /* 14-17 */
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| 63 | uint32_t ucmpsize PACKED; /* 18-21 */
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| 64 | uint16_t filename_len; /* 22-23 */
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| 65 | uint16_t extra_len; /* 24-25 */
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| 66 | } formatted PACKED;
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| 67 | } zip_header_t; /* PACKED - gcc 4.2.1 doesn't like it (spews warning) */
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[821] | 68 |
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[2725] | 69 | /* Check the offset of the last element, not the length. This leniency
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| 70 | * allows for poor packing, whereby the overall struct may be too long,
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| 71 | * even though the elements are all in the right place.
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| 72 | */
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| 73 | struct BUG_zip_header_must_be_26_bytes {
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| 74 | char BUG_zip_header_must_be_26_bytes[
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| 75 | offsetof(zip_header_t, formatted.extra_len) + 2
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| 76 | == ZIP_HEADER_LEN ? 1 : -1];
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| 77 | };
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| 78 |
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| 79 | #define FIX_ENDIANNESS_ZIP(zip_header) do { \
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| 80 | (zip_header).formatted.version = SWAP_LE16((zip_header).formatted.version ); \
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| 81 | (zip_header).formatted.method = SWAP_LE16((zip_header).formatted.method ); \
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| 82 | (zip_header).formatted.modtime = SWAP_LE16((zip_header).formatted.modtime ); \
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| 83 | (zip_header).formatted.moddate = SWAP_LE16((zip_header).formatted.moddate ); \
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| 84 | (zip_header).formatted.crc32 = SWAP_LE32((zip_header).formatted.crc32 ); \
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| 85 | (zip_header).formatted.cmpsize = SWAP_LE32((zip_header).formatted.cmpsize ); \
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| 86 | (zip_header).formatted.ucmpsize = SWAP_LE32((zip_header).formatted.ucmpsize ); \
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| 87 | (zip_header).formatted.filename_len = SWAP_LE16((zip_header).formatted.filename_len); \
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| 88 | (zip_header).formatted.extra_len = SWAP_LE16((zip_header).formatted.extra_len ); \
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| 89 | } while (0)
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| 90 |
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| 91 | #define CDF_HEADER_LEN 42
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| 92 |
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| 93 | typedef union {
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| 94 | uint8_t raw[CDF_HEADER_LEN];
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| 95 | struct {
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| 96 | /* uint32_t signature; 50 4b 01 02 */
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| 97 | uint16_t version_made_by; /* 0-1 */
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| 98 | uint16_t version_needed; /* 2-3 */
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| 99 | uint16_t cdf_flags; /* 4-5 */
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| 100 | uint16_t method; /* 6-7 */
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| 101 | uint16_t mtime; /* 8-9 */
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| 102 | uint16_t mdate; /* 10-11 */
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| 103 | uint32_t crc32; /* 12-15 */
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| 104 | uint32_t cmpsize; /* 16-19 */
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| 105 | uint32_t ucmpsize; /* 20-23 */
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| 106 | uint16_t file_name_length; /* 24-25 */
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| 107 | uint16_t extra_field_length; /* 26-27 */
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| 108 | uint16_t file_comment_length; /* 28-29 */
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| 109 | uint16_t disk_number_start; /* 30-31 */
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| 110 | uint16_t internal_file_attributes; /* 32-33 */
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| 111 | uint32_t external_file_attributes PACKED; /* 34-37 */
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| 112 | uint32_t relative_offset_of_local_header PACKED; /* 38-41 */
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| 113 | } formatted PACKED;
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| 114 | } cdf_header_t;
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| 115 |
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| 116 | struct BUG_cdf_header_must_be_42_bytes {
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| 117 | char BUG_cdf_header_must_be_42_bytes[
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| 118 | offsetof(cdf_header_t, formatted.relative_offset_of_local_header) + 4
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| 119 | == CDF_HEADER_LEN ? 1 : -1];
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| 120 | };
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| 121 |
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| 122 | #define FIX_ENDIANNESS_CDF(cdf_header) do { \
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| 123 | (cdf_header).formatted.crc32 = SWAP_LE32((cdf_header).formatted.crc32 ); \
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| 124 | (cdf_header).formatted.cmpsize = SWAP_LE32((cdf_header).formatted.cmpsize ); \
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| 125 | (cdf_header).formatted.ucmpsize = SWAP_LE32((cdf_header).formatted.ucmpsize ); \
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| 126 | (cdf_header).formatted.file_name_length = SWAP_LE16((cdf_header).formatted.file_name_length); \
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| 127 | (cdf_header).formatted.extra_field_length = SWAP_LE16((cdf_header).formatted.extra_field_length); \
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| 128 | (cdf_header).formatted.file_comment_length = SWAP_LE16((cdf_header).formatted.file_comment_length); \
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| 129 | IF_DESKTOP( \
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| 130 | (cdf_header).formatted.version_made_by = SWAP_LE16((cdf_header).formatted.version_made_by); \
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| 131 | (cdf_header).formatted.external_file_attributes = SWAP_LE32((cdf_header).formatted.external_file_attributes); \
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| 132 | ) \
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| 133 | } while (0)
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| 134 |
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| 135 | #define CDE_HEADER_LEN 16
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| 136 |
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| 137 | typedef union {
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| 138 | uint8_t raw[CDE_HEADER_LEN];
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| 139 | struct {
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| 140 | /* uint32_t signature; 50 4b 05 06 */
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| 141 | uint16_t this_disk_no;
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| 142 | uint16_t disk_with_cdf_no;
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| 143 | uint16_t cdf_entries_on_this_disk;
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| 144 | uint16_t cdf_entries_total;
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| 145 | uint32_t cdf_size;
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| 146 | uint32_t cdf_offset;
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| 147 | /* uint16_t file_comment_length; */
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| 148 | /* .ZIP file comment (variable size) */
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| 149 | } formatted PACKED;
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| 150 | } cde_header_t;
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| 151 |
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| 152 | struct BUG_cde_header_must_be_16_bytes {
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| 153 | char BUG_cde_header_must_be_16_bytes[
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| 154 | sizeof(cde_header_t) == CDE_HEADER_LEN ? 1 : -1];
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| 155 | };
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| 156 |
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| 157 | #define FIX_ENDIANNESS_CDE(cde_header) do { \
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| 158 | (cde_header).formatted.cdf_offset = SWAP_LE32((cde_header).formatted.cdf_offset); \
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| 159 | } while (0)
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| 160 |
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| 161 | enum { zip_fd = 3 };
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| 162 |
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| 163 |
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| 164 | #if ENABLE_DESKTOP
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| 165 |
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| 166 | #define PEEK_FROM_END 16384
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| 167 |
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| 168 | /* NB: does not preserve file position! */
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| 169 | static uint32_t find_cdf_offset(void)
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[821] | 170 | {
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[2725] | 171 | cde_header_t cde_header;
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| 172 | unsigned char *p;
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| 173 | off_t end;
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| 174 | unsigned char *buf = xzalloc(PEEK_FROM_END);
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| 175 |
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| 176 | end = xlseek(zip_fd, 0, SEEK_END);
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| 177 | end -= PEEK_FROM_END;
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| 178 | if (end < 0)
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| 179 | end = 0;
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| 180 | xlseek(zip_fd, end, SEEK_SET);
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| 181 | full_read(zip_fd, buf, PEEK_FROM_END);
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| 182 |
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| 183 | p = buf;
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| 184 | while (p <= buf + PEEK_FROM_END - CDE_HEADER_LEN - 4) {
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| 185 | if (*p != 'P') {
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| 186 | p++;
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| 187 | continue;
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| 188 | }
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| 189 | if (*++p != 'K')
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| 190 | continue;
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| 191 | if (*++p != 5)
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| 192 | continue;
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| 193 | if (*++p != 6)
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| 194 | continue;
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| 195 | /* we found CDE! */
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| 196 | memcpy(cde_header.raw, p + 1, CDE_HEADER_LEN);
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| 197 | FIX_ENDIANNESS_CDE(cde_header);
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| 198 | free(buf);
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| 199 | return cde_header.formatted.cdf_offset;
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[821] | 200 | }
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[2725] | 201 | //free(buf);
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| 202 | bb_error_msg_and_die("can't find file table");
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| 203 | };
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| 204 |
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| 205 | static uint32_t read_next_cdf(uint32_t cdf_offset, cdf_header_t *cdf_ptr)
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| 206 | {
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| 207 | off_t org;
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| 208 |
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| 209 | org = xlseek(zip_fd, 0, SEEK_CUR);
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| 210 |
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| 211 | if (!cdf_offset)
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| 212 | cdf_offset = find_cdf_offset();
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| 213 |
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| 214 | xlseek(zip_fd, cdf_offset + 4, SEEK_SET);
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| 215 | xread(zip_fd, cdf_ptr->raw, CDF_HEADER_LEN);
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| 216 | FIX_ENDIANNESS_CDF(*cdf_ptr);
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| 217 | cdf_offset += 4 + CDF_HEADER_LEN
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| 218 | + cdf_ptr->formatted.file_name_length
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| 219 | + cdf_ptr->formatted.extra_field_length
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| 220 | + cdf_ptr->formatted.file_comment_length;
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| 221 |
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| 222 | xlseek(zip_fd, org, SEEK_SET);
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| 223 | return cdf_offset;
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| 224 | };
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| 225 | #endif
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| 226 |
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| 227 | static void unzip_skip(off_t skip)
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| 228 | {
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| 229 | if (lseek(zip_fd, skip, SEEK_CUR) == (off_t)-1)
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| 230 | bb_copyfd_exact_size(zip_fd, -1, skip);
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[821] | 231 | }
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| 232 |
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[2725] | 233 | static void unzip_create_leading_dirs(const char *fn)
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[821] | 234 | {
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| 235 | /* Create all leading directories */
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[1765] | 236 | char *name = xstrdup(fn);
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[821] | 237 | if (bb_make_directory(dirname(name), 0777, FILEUTILS_RECUR)) {
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[3232] | 238 | xfunc_die(); /* bb_make_directory is noisy */
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[821] | 239 | }
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| 240 | free(name);
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| 241 | }
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| 242 |
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[2725] | 243 | static void unzip_extract(zip_header_t *zip_header, int dst_fd)
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[821] | 244 | {
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[1765] | 245 | if (zip_header->formatted.method == 0) {
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[821] | 246 | /* Method 0 - stored (not compressed) */
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[1765] | 247 | off_t size = zip_header->formatted.ucmpsize;
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| 248 | if (size)
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[2725] | 249 | bb_copyfd_exact_size(zip_fd, dst_fd, size);
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[821] | 250 | } else {
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| 251 | /* Method 8 - inflate */
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[3232] | 252 | transformer_aux_data_t aux;
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| 253 | init_transformer_aux_data(&aux);
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| 254 | aux.bytes_in = zip_header->formatted.cmpsize;
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| 255 | if (inflate_unzip(&aux, zip_fd, dst_fd) < 0)
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[2725] | 256 | bb_error_msg_and_die("inflate error");
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[821] | 257 | /* Validate decompression - crc */
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[3232] | 258 | if (zip_header->formatted.crc32 != (aux.crc32 ^ 0xffffffffL)) {
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[2725] | 259 | bb_error_msg_and_die("crc error");
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[821] | 260 | }
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| 261 | /* Validate decompression - size */
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[3232] | 262 | if (zip_header->formatted.ucmpsize != aux.bytes_out) {
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[2725] | 263 | /* Don't die. Who knows, maybe len calculation
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| 264 | * was botched somewhere. After all, crc matched! */
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| 265 | bb_error_msg("bad length");
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[821] | 266 | }
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| 267 | }
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| 268 | }
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| 269 |
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[2725] | 270 | int unzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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[821] | 271 | int unzip_main(int argc, char **argv)
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| 272 | {
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[2725] | 273 | enum { O_PROMPT, O_NEVER, O_ALWAYS };
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| 274 |
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[821] | 275 | zip_header_t zip_header;
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[2725] | 276 | smallint quiet = 0;
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| 277 | IF_NOT_DESKTOP(const) smallint verbose = 0;
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| 278 | smallint listing = 0;
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| 279 | smallint overwrite = O_PROMPT;
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[3232] | 280 | smallint x_opt_seen;
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[2725] | 281 | #if ENABLE_DESKTOP
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| 282 | uint32_t cdf_offset;
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| 283 | #endif
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| 284 | unsigned long total_usize;
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| 285 | unsigned long total_size;
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| 286 | unsigned total_entries;
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| 287 | int dst_fd = -1;
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| 288 | char *src_fn = NULL;
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| 289 | char *dst_fn = NULL;
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[821] | 290 | llist_t *zaccept = NULL;
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| 291 | llist_t *zreject = NULL;
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| 292 | char *base_dir = NULL;
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[2725] | 293 | int i, opt;
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| 294 | char key_buf[80];
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[821] | 295 | struct stat stat_buf;
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| 296 |
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[2725] | 297 | /* -q, -l and -v: UnZip 5.52 of 28 February 2005, by Info-ZIP:
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| 298 | *
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| 299 | * # /usr/bin/unzip -qq -v decompress_unlzma.i.zip
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| 300 | * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
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| 301 | * # /usr/bin/unzip -q -v decompress_unlzma.i.zip
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| 302 | * Length Method Size Ratio Date Time CRC-32 Name
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| 303 | * -------- ------ ------- ----- ---- ---- ------ ----
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| 304 | * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
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| 305 | * -------- ------- --- -------
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| 306 | * 204372 35278 83% 1 file
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| 307 | * # /usr/bin/unzip -v decompress_unlzma.i.zip
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| 308 | * Archive: decompress_unlzma.i.zip
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| 309 | * Length Method Size Ratio Date Time CRC-32 Name
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| 310 | * -------- ------ ------- ----- ---- ---- ------ ----
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| 311 | * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
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| 312 | * -------- ------- --- -------
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| 313 | * 204372 35278 83% 1 file
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| 314 | * # unzip -v decompress_unlzma.i.zip
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| 315 | * Archive: decompress_unlzma.i.zip
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| 316 | * Length Date Time Name
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| 317 | * -------- ---- ---- ----
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| 318 | * 204372 09-06-09 14:23 decompress_unlzma.i
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| 319 | * -------- -------
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| 320 | * 204372 1 files
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| 321 | * # /usr/bin/unzip -l -qq decompress_unlzma.i.zip
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| 322 | * 204372 09-06-09 14:23 decompress_unlzma.i
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| 323 | * # /usr/bin/unzip -l -q decompress_unlzma.i.zip
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| 324 | * Length Date Time Name
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| 325 | * -------- ---- ---- ----
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| 326 | * 204372 09-06-09 14:23 decompress_unlzma.i
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| 327 | * -------- -------
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| 328 | * 204372 1 file
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| 329 | * # /usr/bin/unzip -l decompress_unlzma.i.zip
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| 330 | * Archive: decompress_unlzma.i.zip
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| 331 | * Length Date Time Name
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| 332 | * -------- ---- ---- ----
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| 333 | * 204372 09-06-09 14:23 decompress_unlzma.i
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| 334 | * -------- -------
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| 335 | * 204372 1 file
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| 336 | */
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| 337 |
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[3232] | 338 | x_opt_seen = 0;
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[2725] | 339 | /* '-' makes getopt return 1 for non-options */
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| 340 | while ((opt = getopt(argc, argv, "-d:lnopqxv")) != -1) {
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[3232] | 341 | switch (opt) {
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| 342 | case 'd': /* Extract to base directory */
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| 343 | base_dir = optarg;
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| 344 | break;
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[821] | 345 |
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[3232] | 346 | case 'l': /* List */
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| 347 | listing = 1;
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| 348 | break;
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[821] | 349 |
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[3232] | 350 | case 'n': /* Never overwrite existing files */
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| 351 | overwrite = O_NEVER;
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| 352 | break;
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[821] | 353 |
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[3232] | 354 | case 'o': /* Always overwrite existing files */
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| 355 | overwrite = O_ALWAYS;
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| 356 | break;
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[821] | 357 |
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[3232] | 358 | case 'p': /* Extract files to stdout and fall through to set verbosity */
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| 359 | dst_fd = STDOUT_FILENO;
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[821] | 360 |
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[3232] | 361 | case 'q': /* Be quiet */
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| 362 | quiet++;
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| 363 | break;
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[2725] | 364 |
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[3232] | 365 | case 'v': /* Verbose list */
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| 366 | IF_DESKTOP(verbose++;)
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| 367 | listing = 1;
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| 368 | break;
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| 369 |
|
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| 370 | case 'x':
|
---|
| 371 | x_opt_seen = 1;
|
---|
| 372 | break;
|
---|
| 373 |
|
---|
| 374 | case 1:
|
---|
| 375 | if (!src_fn) {
|
---|
| 376 | /* The zip file */
|
---|
[2725] | 377 | /* +5: space for ".zip" and NUL */
|
---|
| 378 | src_fn = xmalloc(strlen(optarg) + 5);
|
---|
[1765] | 379 | strcpy(src_fn, optarg);
|
---|
[3232] | 380 | } else if (!x_opt_seen) {
|
---|
| 381 | /* Include files */
|
---|
[821] | 382 | llist_add_to(&zaccept, optarg);
|
---|
[3232] | 383 | } else {
|
---|
| 384 | /* Exclude files */
|
---|
[821] | 385 | llist_add_to(&zreject, optarg);
|
---|
[2725] | 386 | }
|
---|
[3232] | 387 | break;
|
---|
[821] | 388 |
|
---|
| 389 | default:
|
---|
| 390 | bb_show_usage();
|
---|
| 391 | }
|
---|
| 392 | }
|
---|
| 393 |
|
---|
[3232] | 394 | #ifndef __GLIBC__
|
---|
| 395 | /*
|
---|
| 396 | * This code is needed for non-GNU getopt
|
---|
| 397 | * which doesn't understand "-" in option string.
|
---|
| 398 | * The -x option won't work properly in this case:
|
---|
| 399 | * "unzip a.zip q -x w e" will be interpreted as
|
---|
| 400 | * "unzip a.zip q w e -x" = "unzip a.zip q w e"
|
---|
| 401 | */
|
---|
| 402 | argv += optind;
|
---|
| 403 | if (argv[0]) {
|
---|
| 404 | /* +5: space for ".zip" and NUL */
|
---|
| 405 | src_fn = xmalloc(strlen(argv[0]) + 5);
|
---|
| 406 | strcpy(src_fn, argv[0]);
|
---|
| 407 | while (*++argv)
|
---|
| 408 | llist_add_to(&zaccept, *argv);
|
---|
| 409 | }
|
---|
| 410 | #endif
|
---|
| 411 |
|
---|
| 412 | if (!src_fn) {
|
---|
[821] | 413 | bb_show_usage();
|
---|
| 414 | }
|
---|
| 415 |
|
---|
| 416 | /* Open input file */
|
---|
[1765] | 417 | if (LONE_DASH(src_fn)) {
|
---|
[2725] | 418 | xdup2(STDIN_FILENO, zip_fd);
|
---|
[821] | 419 | /* Cannot use prompt mode since zip data is arriving on STDIN */
|
---|
[2725] | 420 | if (overwrite == O_PROMPT)
|
---|
| 421 | overwrite = O_NEVER;
|
---|
[821] | 422 | } else {
|
---|
[3232] | 423 | static const char extn[][5] = { ".zip", ".ZIP" };
|
---|
| 424 | char *ext = src_fn + strlen(src_fn);
|
---|
| 425 | int src_fd;
|
---|
[2725] | 426 |
|
---|
[3232] | 427 | i = 0;
|
---|
| 428 | for (;;) {
|
---|
[821] | 429 | src_fd = open(src_fn, O_RDONLY);
|
---|
[3232] | 430 | if (src_fd >= 0)
|
---|
| 431 | break;
|
---|
| 432 | if (++i > 2) {
|
---|
| 433 | *ext = '\0';
|
---|
| 434 | bb_error_msg_and_die("can't open %s[.zip]", src_fn);
|
---|
| 435 | }
|
---|
| 436 | strcpy(ext, extn[i - 1]);
|
---|
[821] | 437 | }
|
---|
[2725] | 438 | xmove_fd(src_fd, zip_fd);
|
---|
[821] | 439 | }
|
---|
| 440 |
|
---|
| 441 | /* Change dir if necessary */
|
---|
| 442 | if (base_dir)
|
---|
[1765] | 443 | xchdir(base_dir);
|
---|
[821] | 444 |
|
---|
[2725] | 445 | if (quiet <= 1) { /* not -qq */
|
---|
| 446 | if (quiet == 0)
|
---|
| 447 | printf("Archive: %s\n", src_fn);
|
---|
| 448 | if (listing) {
|
---|
| 449 | puts(verbose ?
|
---|
| 450 | " Length Method Size Ratio Date Time CRC-32 Name\n"
|
---|
| 451 | "-------- ------ ------- ----- ---- ---- ------ ----"
|
---|
| 452 | :
|
---|
| 453 | " Length Date Time Name\n"
|
---|
| 454 | " -------- ---- ---- ----"
|
---|
| 455 | );
|
---|
| 456 | }
|
---|
| 457 | }
|
---|
[821] | 458 |
|
---|
[2725] | 459 | /* Example of an archive with one 0-byte long file named 'z'
|
---|
| 460 | * created by Zip 2.31 on Unix:
|
---|
| 461 | * 0000 [50 4b]03 04 0a 00 00 00 00 00 42 1a b8 3c 00 00 |PK........B..<..|
|
---|
| 462 | * sig........ vneed flags compr mtime mdate crc32>
|
---|
| 463 | * 0010 00 00 00 00 00 00 00 00 00 00 01 00 15 00 7a 55 |..............zU|
|
---|
| 464 | * >..... csize...... usize...... fnlen exlen fn ex>
|
---|
| 465 | * 0020 54 09 00 03 cc d3 f9 4b cc d3 f9 4b 55 78 04 00 |T......K...KUx..|
|
---|
| 466 | * >tra_field......................................
|
---|
| 467 | * 0030 00 00 00 00[50 4b]01 02 17 03 0a 00 00 00 00 00 |....PK..........|
|
---|
| 468 | * ........... sig........ vmade vneed flags compr
|
---|
| 469 | * 0040 42 1a b8 3c 00 00 00 00 00 00 00 00 00 00 00 00 |B..<............|
|
---|
| 470 | * mtime mdate crc32...... csize...... usize......
|
---|
| 471 | * 0050 01 00 0d 00 00 00 00 00 00 00 00 00 a4 81 00 00 |................|
|
---|
| 472 | * fnlen exlen clen. dnum. iattr eattr...... relofs> (eattr = rw-r--r--)
|
---|
| 473 | * 0060 00 00 7a 55 54 05 00 03 cc d3 f9 4b 55 78 00 00 |..zUT......KUx..|
|
---|
| 474 | * >..... fn extra_field...........................
|
---|
| 475 | * 0070 [50 4b]05 06 00 00 00 00 01 00 01 00 3c 00 00 00 |PK..........<...|
|
---|
| 476 | * 0080 34 00 00 00 00 00 |4.....|
|
---|
| 477 | */
|
---|
| 478 | total_usize = 0;
|
---|
| 479 | total_size = 0;
|
---|
| 480 | total_entries = 0;
|
---|
| 481 | #if ENABLE_DESKTOP
|
---|
| 482 | cdf_offset = 0;
|
---|
| 483 | #endif
|
---|
[821] | 484 | while (1) {
|
---|
[2725] | 485 | uint32_t magic;
|
---|
| 486 | mode_t dir_mode = 0777;
|
---|
| 487 | #if ENABLE_DESKTOP
|
---|
| 488 | mode_t file_mode = 0666;
|
---|
| 489 | #endif
|
---|
[821] | 490 |
|
---|
| 491 | /* Check magic number */
|
---|
[2725] | 492 | xread(zip_fd, &magic, 4);
|
---|
| 493 | /* Central directory? It's at the end, so exit */
|
---|
| 494 | if (magic == ZIP_CDF_MAGIC)
|
---|
[821] | 495 | break;
|
---|
[2725] | 496 | #if ENABLE_DESKTOP
|
---|
| 497 | /* Data descriptor? It was a streaming file, go on */
|
---|
| 498 | if (magic == ZIP_DD_MAGIC) {
|
---|
| 499 | /* skip over duplicate crc32, cmpsize and ucmpsize */
|
---|
| 500 | unzip_skip(3 * 4);
|
---|
| 501 | continue;
|
---|
[821] | 502 | }
|
---|
[2725] | 503 | #endif
|
---|
| 504 | if (magic != ZIP_FILEHEADER_MAGIC)
|
---|
| 505 | bb_error_msg_and_die("invalid zip magic %08X", (int)magic);
|
---|
[821] | 506 |
|
---|
| 507 | /* Read the file header */
|
---|
[2725] | 508 | xread(zip_fd, zip_header.raw, ZIP_HEADER_LEN);
|
---|
| 509 | FIX_ENDIANNESS_ZIP(zip_header);
|
---|
[1765] | 510 | if ((zip_header.formatted.method != 0) && (zip_header.formatted.method != 8)) {
|
---|
[2725] | 511 | bb_error_msg_and_die("unsupported method %d", zip_header.formatted.method);
|
---|
[821] | 512 | }
|
---|
[2725] | 513 | #if !ENABLE_DESKTOP
|
---|
| 514 | if (zip_header.formatted.zip_flags & SWAP_LE16(0x0009)) {
|
---|
| 515 | bb_error_msg_and_die("zip flags 1 and 8 are not supported");
|
---|
| 516 | }
|
---|
| 517 | #else
|
---|
| 518 | if (zip_header.formatted.zip_flags & SWAP_LE16(0x0001)) {
|
---|
| 519 | /* 0x0001 - encrypted */
|
---|
| 520 | bb_error_msg_and_die("zip flag 1 (encryption) is not supported");
|
---|
| 521 | }
|
---|
[821] | 522 |
|
---|
[2725] | 523 | {
|
---|
| 524 | cdf_header_t cdf_header;
|
---|
| 525 | cdf_offset = read_next_cdf(cdf_offset, &cdf_header);
|
---|
| 526 | if (zip_header.formatted.zip_flags & SWAP_LE16(0x0008)) {
|
---|
| 527 | /* 0x0008 - streaming. [u]cmpsize can be reliably gotten
|
---|
| 528 | * only from Central Directory. See unzip_doc.txt */
|
---|
| 529 | zip_header.formatted.crc32 = cdf_header.formatted.crc32;
|
---|
| 530 | zip_header.formatted.cmpsize = cdf_header.formatted.cmpsize;
|
---|
| 531 | zip_header.formatted.ucmpsize = cdf_header.formatted.ucmpsize;
|
---|
| 532 | }
|
---|
| 533 | if ((cdf_header.formatted.version_made_by >> 8) == 3) {
|
---|
| 534 | /* this archive is created on Unix */
|
---|
| 535 | dir_mode = file_mode = (cdf_header.formatted.external_file_attributes >> 16);
|
---|
| 536 | }
|
---|
| 537 | }
|
---|
| 538 | #endif
|
---|
| 539 |
|
---|
[821] | 540 | /* Read filename */
|
---|
| 541 | free(dst_fn);
|
---|
[1765] | 542 | dst_fn = xzalloc(zip_header.formatted.filename_len + 1);
|
---|
[2725] | 543 | xread(zip_fd, dst_fn, zip_header.formatted.filename_len);
|
---|
[821] | 544 |
|
---|
| 545 | /* Skip extra header bytes */
|
---|
[2725] | 546 | unzip_skip(zip_header.formatted.extra_len);
|
---|
[821] | 547 |
|
---|
| 548 | /* Filter zip entries */
|
---|
[2725] | 549 | if (find_list_entry(zreject, dst_fn)
|
---|
| 550 | || (zaccept && !find_list_entry(zaccept, dst_fn))
|
---|
| 551 | ) { /* Skip entry */
|
---|
[821] | 552 | i = 'n';
|
---|
| 553 |
|
---|
| 554 | } else { /* Extract entry */
|
---|
[2725] | 555 | if (listing) { /* List entry */
|
---|
| 556 | unsigned dostime = zip_header.formatted.modtime | (zip_header.formatted.moddate << 16);
|
---|
| 557 | if (!verbose) {
|
---|
| 558 | // " Length Date Time Name\n"
|
---|
| 559 | // " -------- ---- ---- ----"
|
---|
| 560 | printf( "%9u %02u-%02u-%02u %02u:%02u %s\n",
|
---|
| 561 | (unsigned)zip_header.formatted.ucmpsize,
|
---|
| 562 | (dostime & 0x01e00000) >> 21,
|
---|
| 563 | (dostime & 0x001f0000) >> 16,
|
---|
| 564 | (((dostime & 0xfe000000) >> 25) + 1980) % 100,
|
---|
| 565 | (dostime & 0x0000f800) >> 11,
|
---|
| 566 | (dostime & 0x000007e0) >> 5,
|
---|
| 567 | dst_fn);
|
---|
| 568 | total_usize += zip_header.formatted.ucmpsize;
|
---|
| 569 | } else {
|
---|
| 570 | unsigned long percents = zip_header.formatted.ucmpsize - zip_header.formatted.cmpsize;
|
---|
| 571 | percents = percents * 100;
|
---|
| 572 | if (zip_header.formatted.ucmpsize)
|
---|
| 573 | percents /= zip_header.formatted.ucmpsize;
|
---|
| 574 | // " Length Method Size Ratio Date Time CRC-32 Name\n"
|
---|
| 575 | // "-------- ------ ------- ----- ---- ---- ------ ----"
|
---|
| 576 | printf( "%8u Defl:N" "%9u%4u%% %02u-%02u-%02u %02u:%02u %08x %s\n",
|
---|
| 577 | (unsigned)zip_header.formatted.ucmpsize,
|
---|
| 578 | (unsigned)zip_header.formatted.cmpsize,
|
---|
| 579 | (unsigned)percents,
|
---|
| 580 | (dostime & 0x01e00000) >> 21,
|
---|
| 581 | (dostime & 0x001f0000) >> 16,
|
---|
| 582 | (((dostime & 0xfe000000) >> 25) + 1980) % 100,
|
---|
| 583 | (dostime & 0x0000f800) >> 11,
|
---|
| 584 | (dostime & 0x000007e0) >> 5,
|
---|
| 585 | zip_header.formatted.crc32,
|
---|
| 586 | dst_fn);
|
---|
| 587 | total_usize += zip_header.formatted.ucmpsize;
|
---|
| 588 | total_size += zip_header.formatted.cmpsize;
|
---|
| 589 | }
|
---|
[821] | 590 | i = 'n';
|
---|
| 591 | } else if (dst_fd == STDOUT_FILENO) { /* Extracting to STDOUT */
|
---|
| 592 | i = -1;
|
---|
| 593 | } else if (last_char_is(dst_fn, '/')) { /* Extract directory */
|
---|
| 594 | if (stat(dst_fn, &stat_buf) == -1) {
|
---|
| 595 | if (errno != ENOENT) {
|
---|
[2725] | 596 | bb_perror_msg_and_die("can't stat '%s'", dst_fn);
|
---|
[821] | 597 | }
|
---|
[2725] | 598 | if (!quiet) {
|
---|
[821] | 599 | printf(" creating: %s\n", dst_fn);
|
---|
| 600 | }
|
---|
| 601 | unzip_create_leading_dirs(dst_fn);
|
---|
[3232] | 602 | if (bb_make_directory(dst_fn, dir_mode, FILEUTILS_IGNORE_CHMOD_ERR)) {
|
---|
| 603 | xfunc_die();
|
---|
[821] | 604 | }
|
---|
| 605 | } else {
|
---|
| 606 | if (!S_ISDIR(stat_buf.st_mode)) {
|
---|
| 607 | bb_error_msg_and_die("'%s' exists but is not directory", dst_fn);
|
---|
| 608 | }
|
---|
| 609 | }
|
---|
| 610 | i = 'n';
|
---|
| 611 |
|
---|
| 612 | } else { /* Extract file */
|
---|
[2725] | 613 | check_file:
|
---|
[821] | 614 | if (stat(dst_fn, &stat_buf) == -1) { /* File does not exist */
|
---|
| 615 | if (errno != ENOENT) {
|
---|
[2725] | 616 | bb_perror_msg_and_die("can't stat '%s'", dst_fn);
|
---|
[821] | 617 | }
|
---|
| 618 | i = 'y';
|
---|
| 619 | } else { /* File already exists */
|
---|
[2725] | 620 | if (overwrite == O_NEVER) {
|
---|
[821] | 621 | i = 'n';
|
---|
| 622 | } else if (S_ISREG(stat_buf.st_mode)) { /* File is regular file */
|
---|
[2725] | 623 | if (overwrite == O_ALWAYS) {
|
---|
[821] | 624 | i = 'y';
|
---|
| 625 | } else {
|
---|
| 626 | printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ", dst_fn);
|
---|
[3232] | 627 | fflush_all();
|
---|
[2725] | 628 | if (!fgets(key_buf, sizeof(key_buf), stdin)) {
|
---|
| 629 | bb_perror_msg_and_die("can't read input");
|
---|
[821] | 630 | }
|
---|
| 631 | i = key_buf[0];
|
---|
| 632 | }
|
---|
| 633 | } else { /* File is not regular file */
|
---|
[2725] | 634 | bb_error_msg_and_die("'%s' exists but is not regular file", dst_fn);
|
---|
[821] | 635 | }
|
---|
| 636 | }
|
---|
| 637 | }
|
---|
| 638 | }
|
---|
| 639 |
|
---|
| 640 | switch (i) {
|
---|
| 641 | case 'A':
|
---|
[2725] | 642 | overwrite = O_ALWAYS;
|
---|
[821] | 643 | case 'y': /* Open file and fall into unzip */
|
---|
| 644 | unzip_create_leading_dirs(dst_fn);
|
---|
[2725] | 645 | #if ENABLE_DESKTOP
|
---|
| 646 | dst_fd = xopen3(dst_fn, O_WRONLY | O_CREAT | O_TRUNC, file_mode);
|
---|
| 647 | #else
|
---|
[1765] | 648 | dst_fd = xopen(dst_fn, O_WRONLY | O_CREAT | O_TRUNC);
|
---|
[2725] | 649 | #endif
|
---|
[821] | 650 | case -1: /* Unzip */
|
---|
[2725] | 651 | if (!quiet) {
|
---|
[821] | 652 | printf(" inflating: %s\n", dst_fn);
|
---|
| 653 | }
|
---|
[2725] | 654 | unzip_extract(&zip_header, dst_fd);
|
---|
[821] | 655 | if (dst_fd != STDOUT_FILENO) {
|
---|
| 656 | /* closing STDOUT is potentially bad for future business */
|
---|
| 657 | close(dst_fd);
|
---|
| 658 | }
|
---|
| 659 | break;
|
---|
| 660 |
|
---|
| 661 | case 'N':
|
---|
[2725] | 662 | overwrite = O_NEVER;
|
---|
[821] | 663 | case 'n':
|
---|
| 664 | /* Skip entry data */
|
---|
[2725] | 665 | unzip_skip(zip_header.formatted.cmpsize);
|
---|
[821] | 666 | break;
|
---|
| 667 |
|
---|
| 668 | case 'r':
|
---|
| 669 | /* Prompt for new name */
|
---|
| 670 | printf("new name: ");
|
---|
[2725] | 671 | if (!fgets(key_buf, sizeof(key_buf), stdin)) {
|
---|
| 672 | bb_perror_msg_and_die("can't read input");
|
---|
[821] | 673 | }
|
---|
| 674 | free(dst_fn);
|
---|
[1765] | 675 | dst_fn = xstrdup(key_buf);
|
---|
[821] | 676 | chomp(dst_fn);
|
---|
[2725] | 677 | goto check_file;
|
---|
[821] | 678 |
|
---|
| 679 | default:
|
---|
[2725] | 680 | printf("error: invalid response [%c]\n", (char)i);
|
---|
| 681 | goto check_file;
|
---|
[821] | 682 | }
|
---|
| 683 |
|
---|
[2725] | 684 | total_entries++;
|
---|
[821] | 685 | }
|
---|
| 686 |
|
---|
[2725] | 687 | if (listing && quiet <= 1) {
|
---|
| 688 | if (!verbose) {
|
---|
| 689 | // " Length Date Time Name\n"
|
---|
| 690 | // " -------- ---- ---- ----"
|
---|
| 691 | printf( " -------- -------\n"
|
---|
| 692 | "%9lu" " %u files\n",
|
---|
| 693 | total_usize, total_entries);
|
---|
| 694 | } else {
|
---|
| 695 | unsigned long percents = total_usize - total_size;
|
---|
| 696 | percents = percents * 100;
|
---|
| 697 | if (total_usize)
|
---|
| 698 | percents /= total_usize;
|
---|
| 699 | // " Length Method Size Ratio Date Time CRC-32 Name\n"
|
---|
| 700 | // "-------- ------ ------- ----- ---- ---- ------ ----"
|
---|
| 701 | printf( "-------- ------- --- -------\n"
|
---|
| 702 | "%8lu" "%17lu%4u%% %u files\n",
|
---|
| 703 | total_usize, total_size, (unsigned)percents,
|
---|
| 704 | total_entries);
|
---|
| 705 | }
|
---|
[821] | 706 | }
|
---|
| 707 |
|
---|
[2725] | 708 | return 0;
|
---|
[821] | 709 | }
|
---|