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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10 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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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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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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34 | #include "libbb.h"
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35 | #include "bb_archive.h"
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36 |
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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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50 |
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51 | #define ZIP_HEADER_LEN 26
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52 |
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53 | typedef union {
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54 | uint8_t raw[ZIP_HEADER_LEN];
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55 | struct {
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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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68 |
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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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170 | {
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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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200 | }
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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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231 | }
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232 |
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233 | static void unzip_create_leading_dirs(const char *fn)
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234 | {
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235 | /* Create all leading directories */
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236 | char *name = xstrdup(fn);
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237 | if (bb_make_directory(dirname(name), 0777, FILEUTILS_RECUR)) {
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238 | xfunc_die(); /* bb_make_directory is noisy */
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239 | }
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240 | free(name);
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241 | }
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242 |
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243 | static void unzip_extract(zip_header_t *zip_header, int dst_fd)
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244 | {
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245 | if (zip_header->formatted.method == 0) {
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246 | /* Method 0 - stored (not compressed) */
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247 | off_t size = zip_header->formatted.ucmpsize;
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248 | if (size)
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249 | bb_copyfd_exact_size(zip_fd, dst_fd, size);
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250 | } else {
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251 | /* Method 8 - inflate */
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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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256 | bb_error_msg_and_die("inflate error");
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257 | /* Validate decompression - crc */
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258 | if (zip_header->formatted.crc32 != (aux.crc32 ^ 0xffffffffL)) {
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259 | bb_error_msg_and_die("crc error");
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260 | }
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261 | /* Validate decompression - size */
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262 | if (zip_header->formatted.ucmpsize != aux.bytes_out) {
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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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266 | }
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267 | }
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268 | }
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269 |
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270 | int unzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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271 | int unzip_main(int argc, char **argv)
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272 | {
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273 | enum { O_PROMPT, O_NEVER, O_ALWAYS };
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274 |
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275 | zip_header_t zip_header;
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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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280 | smallint x_opt_seen;
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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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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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293 | int i, opt;
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294 | char key_buf[80];
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295 | struct stat stat_buf;
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296 |
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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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338 | x_opt_seen = 0;
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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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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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345 |
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346 | case 'l': /* List */
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347 | listing = 1;
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348 | break;
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349 |
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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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353 |
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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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357 |
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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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360 |
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361 | case 'q': /* Be quiet */
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362 | quiet++;
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363 | break;
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364 |
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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':
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371 | x_opt_seen = 1;
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372 | break;
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373 |
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374 | case 1:
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375 | if (!src_fn) {
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376 | /* The zip file */
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377 | /* +5: space for ".zip" and NUL */
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378 | src_fn = xmalloc(strlen(optarg) + 5);
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379 | strcpy(src_fn, optarg);
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380 | } else if (!x_opt_seen) {
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381 | /* Include files */
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382 | llist_add_to(&zaccept, optarg);
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383 | } else {
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384 | /* Exclude files */
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385 | llist_add_to(&zreject, optarg);
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386 | }
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387 | break;
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388 |
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389 | default:
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390 | bb_show_usage();
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391 | }
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392 | }
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393 |
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394 | #ifndef __GLIBC__
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395 | /*
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396 | * This code is needed for non-GNU getopt
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397 | * which doesn't understand "-" in option string.
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398 | * The -x option won't work properly in this case:
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399 | * "unzip a.zip q -x w e" will be interpreted as
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400 | * "unzip a.zip q w e -x" = "unzip a.zip q w e"
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401 | */
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402 | argv += optind;
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403 | if (argv[0]) {
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404 | /* +5: space for ".zip" and NUL */
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405 | src_fn = xmalloc(strlen(argv[0]) + 5);
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406 | strcpy(src_fn, argv[0]);
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---|
407 | while (*++argv)
|
---|
408 | llist_add_to(&zaccept, *argv);
|
---|
409 | }
|
---|
410 | #endif
|
---|
411 |
|
---|
412 | if (!src_fn) {
|
---|
413 | bb_show_usage();
|
---|
414 | }
|
---|
415 |
|
---|
416 | /* Open input file */
|
---|
417 | if (LONE_DASH(src_fn)) {
|
---|
418 | xdup2(STDIN_FILENO, zip_fd);
|
---|
419 | /* Cannot use prompt mode since zip data is arriving on STDIN */
|
---|
420 | if (overwrite == O_PROMPT)
|
---|
421 | overwrite = O_NEVER;
|
---|
422 | } else {
|
---|
423 | static const char extn[][5] = { ".zip", ".ZIP" };
|
---|
424 | char *ext = src_fn + strlen(src_fn);
|
---|
425 | int src_fd;
|
---|
426 |
|
---|
427 | i = 0;
|
---|
428 | for (;;) {
|
---|
429 | src_fd = open(src_fn, O_RDONLY);
|
---|
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]);
|
---|
437 | }
|
---|
438 | xmove_fd(src_fd, zip_fd);
|
---|
439 | }
|
---|
440 |
|
---|
441 | /* Change dir if necessary */
|
---|
442 | if (base_dir)
|
---|
443 | xchdir(base_dir);
|
---|
444 |
|
---|
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 | }
|
---|
458 |
|
---|
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
|
---|
484 | while (1) {
|
---|
485 | uint32_t magic;
|
---|
486 | mode_t dir_mode = 0777;
|
---|
487 | #if ENABLE_DESKTOP
|
---|
488 | mode_t file_mode = 0666;
|
---|
489 | #endif
|
---|
490 |
|
---|
491 | /* Check magic number */
|
---|
492 | xread(zip_fd, &magic, 4);
|
---|
493 | /* Central directory? It's at the end, so exit */
|
---|
494 | if (magic == ZIP_CDF_MAGIC)
|
---|
495 | break;
|
---|
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;
|
---|
502 | }
|
---|
503 | #endif
|
---|
504 | if (magic != ZIP_FILEHEADER_MAGIC)
|
---|
505 | bb_error_msg_and_die("invalid zip magic %08X", (int)magic);
|
---|
506 |
|
---|
507 | /* Read the file header */
|
---|
508 | xread(zip_fd, zip_header.raw, ZIP_HEADER_LEN);
|
---|
509 | FIX_ENDIANNESS_ZIP(zip_header);
|
---|
510 | if ((zip_header.formatted.method != 0) && (zip_header.formatted.method != 8)) {
|
---|
511 | bb_error_msg_and_die("unsupported method %d", zip_header.formatted.method);
|
---|
512 | }
|
---|
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 | }
|
---|
522 |
|
---|
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 |
|
---|
540 | /* Read filename */
|
---|
541 | free(dst_fn);
|
---|
542 | dst_fn = xzalloc(zip_header.formatted.filename_len + 1);
|
---|
543 | xread(zip_fd, dst_fn, zip_header.formatted.filename_len);
|
---|
544 |
|
---|
545 | /* Skip extra header bytes */
|
---|
546 | unzip_skip(zip_header.formatted.extra_len);
|
---|
547 |
|
---|
548 | /* Filter zip entries */
|
---|
549 | if (find_list_entry(zreject, dst_fn)
|
---|
550 | || (zaccept && !find_list_entry(zaccept, dst_fn))
|
---|
551 | ) { /* Skip entry */
|
---|
552 | i = 'n';
|
---|
553 |
|
---|
554 | } else { /* Extract entry */
|
---|
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 | }
|
---|
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) {
|
---|
596 | bb_perror_msg_and_die("can't stat '%s'", dst_fn);
|
---|
597 | }
|
---|
598 | if (!quiet) {
|
---|
599 | printf(" creating: %s\n", dst_fn);
|
---|
600 | }
|
---|
601 | unzip_create_leading_dirs(dst_fn);
|
---|
602 | if (bb_make_directory(dst_fn, dir_mode, FILEUTILS_IGNORE_CHMOD_ERR)) {
|
---|
603 | xfunc_die();
|
---|
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 */
|
---|
613 | check_file:
|
---|
614 | if (stat(dst_fn, &stat_buf) == -1) { /* File does not exist */
|
---|
615 | if (errno != ENOENT) {
|
---|
616 | bb_perror_msg_and_die("can't stat '%s'", dst_fn);
|
---|
617 | }
|
---|
618 | i = 'y';
|
---|
619 | } else { /* File already exists */
|
---|
620 | if (overwrite == O_NEVER) {
|
---|
621 | i = 'n';
|
---|
622 | } else if (S_ISREG(stat_buf.st_mode)) { /* File is regular file */
|
---|
623 | if (overwrite == O_ALWAYS) {
|
---|
624 | i = 'y';
|
---|
625 | } else {
|
---|
626 | printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ", dst_fn);
|
---|
627 | fflush_all();
|
---|
628 | if (!fgets(key_buf, sizeof(key_buf), stdin)) {
|
---|
629 | bb_perror_msg_and_die("can't read input");
|
---|
630 | }
|
---|
631 | i = key_buf[0];
|
---|
632 | }
|
---|
633 | } else { /* File is not regular file */
|
---|
634 | bb_error_msg_and_die("'%s' exists but is not regular file", dst_fn);
|
---|
635 | }
|
---|
636 | }
|
---|
637 | }
|
---|
638 | }
|
---|
639 |
|
---|
640 | switch (i) {
|
---|
641 | case 'A':
|
---|
642 | overwrite = O_ALWAYS;
|
---|
643 | case 'y': /* Open file and fall into unzip */
|
---|
644 | unzip_create_leading_dirs(dst_fn);
|
---|
645 | #if ENABLE_DESKTOP
|
---|
646 | dst_fd = xopen3(dst_fn, O_WRONLY | O_CREAT | O_TRUNC, file_mode);
|
---|
647 | #else
|
---|
648 | dst_fd = xopen(dst_fn, O_WRONLY | O_CREAT | O_TRUNC);
|
---|
649 | #endif
|
---|
650 | case -1: /* Unzip */
|
---|
651 | if (!quiet) {
|
---|
652 | printf(" inflating: %s\n", dst_fn);
|
---|
653 | }
|
---|
654 | unzip_extract(&zip_header, dst_fd);
|
---|
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':
|
---|
662 | overwrite = O_NEVER;
|
---|
663 | case 'n':
|
---|
664 | /* Skip entry data */
|
---|
665 | unzip_skip(zip_header.formatted.cmpsize);
|
---|
666 | break;
|
---|
667 |
|
---|
668 | case 'r':
|
---|
669 | /* Prompt for new name */
|
---|
670 | printf("new name: ");
|
---|
671 | if (!fgets(key_buf, sizeof(key_buf), stdin)) {
|
---|
672 | bb_perror_msg_and_die("can't read input");
|
---|
673 | }
|
---|
674 | free(dst_fn);
|
---|
675 | dst_fn = xstrdup(key_buf);
|
---|
676 | chomp(dst_fn);
|
---|
677 | goto check_file;
|
---|
678 |
|
---|
679 | default:
|
---|
680 | printf("error: invalid response [%c]\n", (char)i);
|
---|
681 | goto check_file;
|
---|
682 | }
|
---|
683 |
|
---|
684 | total_entries++;
|
---|
685 | }
|
---|
686 |
|
---|
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 | }
|
---|
706 | }
|
---|
707 |
|
---|
708 | return 0;
|
---|
709 | }
|
---|