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