1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini tar implementation for busybox
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4 | *
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5 | * Modified to use common extraction code used by ar, cpio, dpkg-deb, dpkg
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6 | * Glenn McGrath <bug1@iinet.net.au>
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7 | *
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8 | * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
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9 | * ground up. It still has remnants of the old code lying about, but it is
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10 | * very different now (i.e., cleaner, less global variables, etc.)
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11 | *
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12 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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13 | *
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14 | * Based in part in the tar implementation in sash
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15 | * Copyright (c) 1999 by David I. Bell
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16 | * Permission is granted to use, distribute, or modify this source,
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17 | * provided that this copyright notice remains intact.
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18 | * Permission to distribute sash derived code under the GPL has been granted.
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19 | *
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20 | * Based in part on the tar implementation from busybox-0.28
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21 | * Copyright (C) 1995 Bruce Perens
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22 | *
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23 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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24 | */
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25 |
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26 | #include <fcntl.h>
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27 | #include <getopt.h>
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28 | #include <search.h>
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29 | #include <stdio.h>
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30 | #include <stdlib.h>
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31 | #include <unistd.h>
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32 | #include <fnmatch.h>
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33 | #include <string.h>
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34 | #include <errno.h>
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35 | #include <signal.h>
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36 | #include <sys/wait.h>
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37 | #include <sys/socket.h>
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38 | #include <sys/sysmacros.h> /* major() and minor() */
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39 | #include "unarchive.h"
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40 | #include "busybox.h"
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41 |
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42 | #ifdef CONFIG_FEATURE_TAR_CREATE
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43 |
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44 | /* Tar file constants */
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45 |
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46 | #define TAR_BLOCK_SIZE 512
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47 |
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48 | /* POSIX tar Header Block, from POSIX 1003.1-1990 */
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49 | #define NAME_SIZE 100
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50 | struct TarHeader { /* byte offset */
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51 | char name[NAME_SIZE]; /* 0-99 */
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52 | char mode[8]; /* 100-107 */
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53 | char uid[8]; /* 108-115 */
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54 | char gid[8]; /* 116-123 */
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55 | char size[12]; /* 124-135 */
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56 | char mtime[12]; /* 136-147 */
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57 | char chksum[8]; /* 148-155 */
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58 | char typeflag; /* 156-156 */
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59 | char linkname[NAME_SIZE]; /* 157-256 */
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60 | char magic[6]; /* 257-262 */
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61 | char version[2]; /* 263-264 */
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62 | char uname[32]; /* 265-296 */
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63 | char gname[32]; /* 297-328 */
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64 | char devmajor[8]; /* 329-336 */
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65 | char devminor[8]; /* 337-344 */
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66 | char prefix[155]; /* 345-499 */
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67 | char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
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68 | };
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69 | typedef struct TarHeader TarHeader;
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70 |
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71 | /*
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72 | ** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
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73 | ** the only functions that deal with the HardLinkInfo structure.
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74 | ** Even these functions use the xxxHardLinkInfo() functions.
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75 | */
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76 | typedef struct HardLinkInfo HardLinkInfo;
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77 | struct HardLinkInfo {
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78 | HardLinkInfo *next; /* Next entry in list */
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79 | dev_t dev; /* Device number */
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80 | ino_t ino; /* Inode number */
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81 | short linkCount; /* (Hard) Link Count */
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82 | char name[1]; /* Start of filename (must be last) */
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83 | };
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84 |
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85 | /* Some info to be carried along when creating a new tarball */
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86 | struct TarBallInfo {
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87 | char *fileName; /* File name of the tarball */
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88 | int tarFd; /* Open-for-write file descriptor
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89 | for the tarball */
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90 | struct stat statBuf; /* Stat info for the tarball, letting
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91 | us know the inode and device that the
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92 | tarball lives, so we can avoid trying
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93 | to include the tarball into itself */
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94 | int verboseFlag; /* Whether to print extra stuff or not */
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95 | const llist_t *excludeList; /* List of files to not include */
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96 | HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
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97 | HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
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98 | };
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99 | typedef struct TarBallInfo TarBallInfo;
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100 |
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101 | /* A nice enum with all the possible tar file content types */
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102 | enum TarFileType {
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103 | REGTYPE = '0', /* regular file */
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104 | REGTYPE0 = '\0', /* regular file (ancient bug compat) */
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105 | LNKTYPE = '1', /* hard link */
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106 | SYMTYPE = '2', /* symbolic link */
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107 | CHRTYPE = '3', /* character special */
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108 | BLKTYPE = '4', /* block special */
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109 | DIRTYPE = '5', /* directory */
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110 | FIFOTYPE = '6', /* FIFO special */
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111 | CONTTYPE = '7', /* reserved */
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112 | GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
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113 | GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
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114 | };
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115 | typedef enum TarFileType TarFileType;
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116 |
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117 | /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
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118 | static inline void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
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119 | struct stat *statbuf,
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120 | const char *name)
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121 | {
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122 | /* Note: hlInfoHeadPtr can never be NULL! */
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123 | HardLinkInfo *hlInfo;
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124 |
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125 | hlInfo = (HardLinkInfo *) xmalloc(sizeof(HardLinkInfo) + strlen(name));
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126 | hlInfo->next = *hlInfoHeadPtr;
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127 | *hlInfoHeadPtr = hlInfo;
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128 | hlInfo->dev = statbuf->st_dev;
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129 | hlInfo->ino = statbuf->st_ino;
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130 | hlInfo->linkCount = statbuf->st_nlink;
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131 | strcpy(hlInfo->name, name);
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132 | }
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133 |
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134 | static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
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135 | {
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136 | HardLinkInfo *hlInfo = NULL;
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137 | HardLinkInfo *hlInfoNext = NULL;
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138 |
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139 | if (hlInfoHeadPtr) {
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140 | hlInfo = *hlInfoHeadPtr;
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141 | while (hlInfo) {
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142 | hlInfoNext = hlInfo->next;
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143 | free(hlInfo);
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144 | hlInfo = hlInfoNext;
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145 | }
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146 | *hlInfoHeadPtr = NULL;
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147 | }
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148 | return;
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149 | }
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150 |
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151 | /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
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152 | static inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
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153 | {
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154 | while (hlInfo) {
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155 | if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
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156 | break;
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157 | hlInfo = hlInfo->next;
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158 | }
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159 | return (hlInfo);
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160 | }
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161 |
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162 | /* Put an octal string into the specified buffer.
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163 | * The number is zero and space padded and possibly null padded.
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164 | * Returns TRUE if successful. */
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165 | static int putOctal(char *cp, int len, long value)
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166 | {
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167 | int tempLength;
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168 | char tempBuffer[32];
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169 | char *tempString = tempBuffer;
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170 |
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171 | /* Create a string of the specified length with an initial space,
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172 | * leading zeroes and the octal number, and a trailing null. */
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173 | sprintf(tempString, "%0*lo", len - 1, value);
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174 |
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175 | /* If the string is too large, suppress the leading space. */
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176 | tempLength = strlen(tempString) + 1;
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177 | if (tempLength > len) {
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178 | tempLength--;
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179 | tempString++;
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180 | }
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181 |
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182 | /* If the string is still too large, suppress the trailing null. */
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183 | if (tempLength > len)
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184 | tempLength--;
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185 |
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186 | /* If the string is still too large, fail. */
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187 | if (tempLength > len)
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188 | return FALSE;
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189 |
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190 | /* Copy the string to the field. */
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191 | memcpy(cp, tempString, len);
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192 |
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193 | return TRUE;
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194 | }
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195 |
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196 | /* Write out a tar header for the specified file/directory/whatever */
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197 | static inline int writeTarHeader(struct TarBallInfo *tbInfo,
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198 | const char *header_name, const char *real_name, struct stat *statbuf)
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199 | {
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200 | long chksum = 0;
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201 | struct TarHeader header;
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202 | const unsigned char *cp = (const unsigned char *) &header;
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203 | ssize_t size = sizeof(struct TarHeader);
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204 |
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205 | memset(&header, 0, size);
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206 |
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207 | safe_strncpy(header.name, header_name, sizeof(header.name));
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208 |
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209 | putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
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210 | putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
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211 | putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
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212 | putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
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213 | putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
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214 | strcpy(header.magic, "ustar ");
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215 |
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216 | /* Enter the user and group names (default to root if it fails) */
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217 | if (bb_getpwuid(header.uname, statbuf->st_uid, sizeof(header.uname)) == NULL)
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218 | strcpy(header.uname, "root");
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219 | if (bb_getgrgid(header.gname, statbuf->st_gid, sizeof(header.gname)) == NULL)
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220 | strcpy(header.gname, "root");
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221 |
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222 | if (tbInfo->hlInfo) {
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223 | /* This is a hard link */
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224 | header.typeflag = LNKTYPE;
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225 | strncpy(header.linkname, tbInfo->hlInfo->name,
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226 | sizeof(header.linkname));
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227 | } else if (S_ISLNK(statbuf->st_mode)) {
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228 | char *lpath = xreadlink(real_name);
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229 |
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230 | if (!lpath) /* Already printed err msg inside xreadlink() */
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231 | return (FALSE);
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232 | header.typeflag = SYMTYPE;
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233 | strncpy(header.linkname, lpath, sizeof(header.linkname));
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234 | free(lpath);
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235 | } else if (S_ISDIR(statbuf->st_mode)) {
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236 | header.typeflag = DIRTYPE;
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237 | strncat(header.name, "/", sizeof(header.name));
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238 | } else if (S_ISCHR(statbuf->st_mode)) {
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239 | header.typeflag = CHRTYPE;
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240 | putOctal(header.devmajor, sizeof(header.devmajor),
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241 | major(statbuf->st_rdev));
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242 | putOctal(header.devminor, sizeof(header.devminor),
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243 | minor(statbuf->st_rdev));
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244 | } else if (S_ISBLK(statbuf->st_mode)) {
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245 | header.typeflag = BLKTYPE;
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246 | putOctal(header.devmajor, sizeof(header.devmajor),
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247 | major(statbuf->st_rdev));
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248 | putOctal(header.devminor, sizeof(header.devminor),
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249 | minor(statbuf->st_rdev));
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250 | } else if (S_ISFIFO(statbuf->st_mode)) {
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251 | header.typeflag = FIFOTYPE;
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252 | } else if (S_ISREG(statbuf->st_mode)) {
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253 | header.typeflag = REGTYPE;
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254 | putOctal(header.size, sizeof(header.size), statbuf->st_size);
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255 | } else {
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256 | bb_error_msg("%s: Unknown file type", real_name);
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257 | return (FALSE);
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258 | }
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259 |
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260 | /* Calculate and store the checksum (i.e., the sum of all of the bytes of
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261 | * the header). The checksum field must be filled with blanks for the
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262 | * calculation. The checksum field is formatted differently from the
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263 | * other fields: it has [6] digits, a null, then a space -- rather than
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264 | * digits, followed by a null like the other fields... */
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265 | memset(header.chksum, ' ', sizeof(header.chksum));
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266 | cp = (const unsigned char *) &header;
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267 | while (size-- > 0)
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268 | chksum += *cp++;
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269 | putOctal(header.chksum, 7, chksum);
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270 |
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271 | /* Now write the header out to disk */
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272 | if ((size =
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273 | bb_full_write(tbInfo->tarFd, (char *) &header,
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274 | sizeof(struct TarHeader))) < 0) {
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275 | bb_error_msg(bb_msg_io_error, real_name);
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276 | return (FALSE);
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277 | }
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278 | /* Pad the header up to the tar block size */
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279 | for (; size < TAR_BLOCK_SIZE; size++) {
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280 | write(tbInfo->tarFd, "\0", 1);
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281 | }
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282 | /* Now do the verbose thing (or not) */
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283 |
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284 | if (tbInfo->verboseFlag) {
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285 | FILE *vbFd = stdout;
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286 |
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287 | if (tbInfo->tarFd == STDOUT_FILENO) /* If the archive goes to stdout, verbose to stderr */
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288 | vbFd = stderr;
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289 |
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290 | fprintf(vbFd, "%s\n", header.name);
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291 | }
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292 |
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293 | return (TRUE);
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294 | }
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295 |
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296 | # ifdef CONFIG_FEATURE_TAR_FROM
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297 | static inline int exclude_file(const llist_t *excluded_files, const char *file)
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298 | {
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299 | while (excluded_files) {
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300 | if (excluded_files->data[0] == '/') {
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301 | if (fnmatch(excluded_files->data, file,
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302 | FNM_PATHNAME | FNM_LEADING_DIR) == 0)
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303 | return 1;
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304 | } else {
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305 | const char *p;
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306 |
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307 | for (p = file; p[0] != '\0'; p++) {
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308 | if ((p == file || p[-1] == '/') && p[0] != '/' &&
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309 | fnmatch(excluded_files->data, p,
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310 | FNM_PATHNAME | FNM_LEADING_DIR) == 0)
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311 | return 1;
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312 | }
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313 | }
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314 | excluded_files = excluded_files->link;
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315 | }
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316 |
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317 | return 0;
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318 | }
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319 | # else
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320 | #define exclude_file(excluded_files, file) 0
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321 | # endif
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322 |
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323 | static int writeFileToTarball(const char *fileName, struct stat *statbuf,
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324 | void *userData)
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325 | {
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326 | struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
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327 | const char *header_name;
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328 | int inputFileFd = -1;
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329 |
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330 | /*
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331 | ** Check to see if we are dealing with a hard link.
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332 | ** If so -
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333 | ** Treat the first occurance of a given dev/inode as a file while
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334 | ** treating any additional occurances as hard links. This is done
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335 | ** by adding the file information to the HardLinkInfo linked list.
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336 | */
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337 | tbInfo->hlInfo = NULL;
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338 | if (statbuf->st_nlink > 1) {
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339 | tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
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340 | if (tbInfo->hlInfo == NULL)
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341 | addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
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342 | }
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343 |
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344 | /* It is against the rules to archive a socket */
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345 | if (S_ISSOCK(statbuf->st_mode)) {
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346 | bb_error_msg("%s: socket ignored", fileName);
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347 | return (TRUE);
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348 | }
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349 |
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350 | /* It is a bad idea to store the archive we are in the process of creating,
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351 | * so check the device and inode to be sure that this particular file isn't
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352 | * the new tarball */
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353 | if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
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354 | tbInfo->statBuf.st_ino == statbuf->st_ino) {
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355 | bb_error_msg("%s: file is the archive; skipping", fileName);
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356 | return (TRUE);
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357 | }
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358 |
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359 | header_name = fileName;
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360 | while (header_name[0] == '/') {
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361 | static int alreadyWarned = FALSE;
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362 |
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363 | if (alreadyWarned == FALSE) {
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364 | bb_error_msg("Removing leading '/' from member names");
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365 | alreadyWarned = TRUE;
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366 | }
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367 | header_name++;
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368 | }
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369 |
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370 | if (strlen(fileName) >= NAME_SIZE) {
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371 | bb_error_msg(bb_msg_name_longer_than_foo, NAME_SIZE);
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372 | return (TRUE);
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373 | }
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374 |
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375 | if (header_name[0] == '\0')
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376 | return TRUE;
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377 |
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378 | if (ENABLE_FEATURE_TAR_FROM &&
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379 | exclude_file(tbInfo->excludeList, header_name)) {
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380 | return SKIP;
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381 | }
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382 |
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383 | /* Is this a regular file? */
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384 | if ((tbInfo->hlInfo == NULL) && (S_ISREG(statbuf->st_mode))) {
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385 |
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386 | /* open the file we want to archive, and make sure all is well */
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387 | if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
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388 | bb_perror_msg("%s: Cannot open", fileName);
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389 | return (FALSE);
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390 | }
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391 | }
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392 |
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393 | /* Add an entry to the tarball */
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394 | if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
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395 | return (FALSE);
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396 | }
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397 |
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398 | /* If it was a regular file, write out the body */
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399 | if (inputFileFd >= 0 ) {
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400 | ssize_t readSize = 0;
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401 |
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402 | /* write the file to the archive */
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403 | readSize = bb_copyfd_eof(inputFileFd, tbInfo->tarFd);
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404 | close(inputFileFd);
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405 |
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406 | /* Pad the file up to the tar block size */
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407 | for (; (readSize % TAR_BLOCK_SIZE) != 0; readSize++)
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408 | write(tbInfo->tarFd, "\0", 1);
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409 | }
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410 |
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411 | return (TRUE);
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412 | }
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413 |
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414 | static inline int writeTarFile(const int tar_fd, const int verboseFlag,
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415 | const unsigned long dereferenceFlag, const llist_t *include,
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416 | const llist_t *exclude, const int gzip)
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417 | {
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418 | pid_t gzipPid = 0;
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419 |
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420 | int errorFlag = FALSE;
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421 | ssize_t size;
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422 | struct TarBallInfo tbInfo;
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423 |
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424 | tbInfo.hlInfoHead = NULL;
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425 |
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426 | fchmod(tar_fd, 0644);
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427 | tbInfo.tarFd = tar_fd;
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428 | tbInfo.verboseFlag = verboseFlag;
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429 |
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430 | /* Store the stat info for the tarball's file, so
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431 | * can avoid including the tarball into itself.... */
|
---|
432 | if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
|
---|
433 | bb_perror_msg_and_die("Couldnt stat tar file");
|
---|
434 |
|
---|
435 | if ((ENABLE_FEATURE_TAR_GZIP || ENABLE_FEATURE_TAR_BZIP2) && gzip) {
|
---|
436 | int gzipDataPipe[2] = { -1, -1 };
|
---|
437 | int gzipStatusPipe[2] = { -1, -1 };
|
---|
438 | volatile int vfork_exec_errno = 0;
|
---|
439 | char *zip_exec = (gzip == 1) ? "gzip" : "bzip2";
|
---|
440 |
|
---|
441 |
|
---|
442 | if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0)
|
---|
443 | bb_perror_msg_and_die("create pipe");
|
---|
444 |
|
---|
445 | signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
|
---|
446 |
|
---|
447 | # if __GNUC__
|
---|
448 | /* Avoid vfork clobbering */
|
---|
449 | (void) &include;
|
---|
450 | (void) &errorFlag;
|
---|
451 | (void) &zip_exec;
|
---|
452 | # endif
|
---|
453 |
|
---|
454 | gzipPid = vfork();
|
---|
455 |
|
---|
456 | if (gzipPid == 0) {
|
---|
457 | dup2(gzipDataPipe[0], 0);
|
---|
458 | close(gzipDataPipe[1]);
|
---|
459 |
|
---|
460 | if (tbInfo.tarFd != 1)
|
---|
461 | dup2(tbInfo.tarFd, 1);
|
---|
462 |
|
---|
463 | close(gzipStatusPipe[0]);
|
---|
464 | fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows success */
|
---|
465 |
|
---|
466 | execlp(zip_exec, zip_exec, "-f", NULL);
|
---|
467 | vfork_exec_errno = errno;
|
---|
468 |
|
---|
469 | close(gzipStatusPipe[1]);
|
---|
470 | exit(-1);
|
---|
471 | } else if (gzipPid > 0) {
|
---|
472 | close(gzipDataPipe[0]);
|
---|
473 | close(gzipStatusPipe[1]);
|
---|
474 |
|
---|
475 | while (1) {
|
---|
476 | char buf;
|
---|
477 |
|
---|
478 | int n = bb_full_read(gzipStatusPipe[0], &buf, 1);
|
---|
479 |
|
---|
480 | if (n == 0 && vfork_exec_errno != 0) {
|
---|
481 | errno = vfork_exec_errno;
|
---|
482 | bb_perror_msg_and_die("Could not exec %s", zip_exec);
|
---|
483 | } else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
|
---|
484 | continue; /* try it again */
|
---|
485 | break;
|
---|
486 | }
|
---|
487 | close(gzipStatusPipe[0]);
|
---|
488 |
|
---|
489 | tbInfo.tarFd = gzipDataPipe[1];
|
---|
490 | } else bb_perror_msg_and_die("vfork gzip");
|
---|
491 | }
|
---|
492 |
|
---|
493 | tbInfo.excludeList = exclude;
|
---|
494 |
|
---|
495 | /* Read the directory/files and iterate over them one at a time */
|
---|
496 | while (include) {
|
---|
497 | if (!recursive_action(include->data, TRUE, dereferenceFlag,
|
---|
498 | FALSE, writeFileToTarball, writeFileToTarball, &tbInfo))
|
---|
499 | {
|
---|
500 | errorFlag = TRUE;
|
---|
501 | }
|
---|
502 | include = include->link;
|
---|
503 | }
|
---|
504 | /* Write two empty blocks to the end of the archive */
|
---|
505 | for (size = 0; size < (2 * TAR_BLOCK_SIZE); size++)
|
---|
506 | write(tbInfo.tarFd, "\0", 1);
|
---|
507 |
|
---|
508 | /* To be pedantically correct, we would check if the tarball
|
---|
509 | * is smaller than 20 tar blocks, and pad it if it was smaller,
|
---|
510 | * but that isn't necessary for GNU tar interoperability, and
|
---|
511 | * so is considered a waste of space */
|
---|
512 |
|
---|
513 | /* Close so the child process (if any) will exit */
|
---|
514 | close(tbInfo.tarFd);
|
---|
515 |
|
---|
516 | /* Hang up the tools, close up shop, head home */
|
---|
517 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
518 | freeHardLinkInfo(&tbInfo.hlInfoHead);
|
---|
519 |
|
---|
520 | if (errorFlag)
|
---|
521 | bb_error_msg("Error exit delayed from previous errors");
|
---|
522 |
|
---|
523 | if (gzipPid && waitpid(gzipPid, NULL, 0)==-1)
|
---|
524 | bb_error_msg("Couldnt wait");
|
---|
525 |
|
---|
526 | return !errorFlag;
|
---|
527 | }
|
---|
528 | #else
|
---|
529 | int writeTarFile(const int tar_fd, const int verboseFlag,
|
---|
530 | const unsigned long dereferenceFlag, const llist_t *include,
|
---|
531 | const llist_t *exclude, const int gzip);
|
---|
532 | #endif /* tar_create */
|
---|
533 |
|
---|
534 | #ifdef CONFIG_FEATURE_TAR_FROM
|
---|
535 | static llist_t *append_file_list_to_list(llist_t *list)
|
---|
536 | {
|
---|
537 | FILE *src_stream;
|
---|
538 | llist_t *cur = list;
|
---|
539 | llist_t *tmp;
|
---|
540 | char *line;
|
---|
541 | llist_t *newlist = NULL;
|
---|
542 |
|
---|
543 | while (cur) {
|
---|
544 | src_stream = bb_xfopen(cur->data, "r");
|
---|
545 | tmp = cur;
|
---|
546 | cur = cur->link;
|
---|
547 | free(tmp);
|
---|
548 | while ((line = bb_get_chomped_line_from_file(src_stream)) != NULL)
|
---|
549 | llist_add_to(&newlist, line);
|
---|
550 | fclose(src_stream);
|
---|
551 | }
|
---|
552 | return newlist;
|
---|
553 | }
|
---|
554 | #else
|
---|
555 | #define append_file_list_to_list(x) 0
|
---|
556 | #endif
|
---|
557 |
|
---|
558 | #ifdef CONFIG_FEATURE_TAR_COMPRESS
|
---|
559 | static char get_header_tar_Z(archive_handle_t *archive_handle)
|
---|
560 | {
|
---|
561 | /* Cant lseek over pipe's */
|
---|
562 | archive_handle->seek = seek_by_char;
|
---|
563 |
|
---|
564 | /* do the decompression, and cleanup */
|
---|
565 | if (bb_xread_char(archive_handle->src_fd) != 0x1f ||
|
---|
566 | bb_xread_char(archive_handle->src_fd) != 0x9d)
|
---|
567 | {
|
---|
568 | bb_error_msg_and_die("Invalid magic");
|
---|
569 | }
|
---|
570 |
|
---|
571 | archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress);
|
---|
572 | archive_handle->offset = 0;
|
---|
573 | while (get_header_tar(archive_handle) == EXIT_SUCCESS);
|
---|
574 |
|
---|
575 | /* Can only do one file at a time */
|
---|
576 | return(EXIT_FAILURE);
|
---|
577 | }
|
---|
578 | #else
|
---|
579 | #define get_header_tar_Z 0
|
---|
580 | #endif
|
---|
581 |
|
---|
582 | #define CTX_TEST (1 << 0)
|
---|
583 | #define CTX_EXTRACT (1 << 1)
|
---|
584 | #define TAR_OPT_BASEDIR (1 << 2)
|
---|
585 | #define TAR_OPT_TARNAME (1 << 3)
|
---|
586 | #define TAR_OPT_2STDOUT (1 << 4)
|
---|
587 | #define TAR_OPT_P (1 << 5)
|
---|
588 | #define TAR_OPT_VERBOSE (1 << 6)
|
---|
589 | #define TAR_OPT_KEEP_OLD (1 << 7)
|
---|
590 |
|
---|
591 | #define TAR_OPT_AFTER_START 8
|
---|
592 |
|
---|
593 | #define CTX_CREATE (1 << (TAR_OPT_AFTER_START))
|
---|
594 | #define TAR_OPT_DEREFERENCE (1 << (TAR_OPT_AFTER_START + 1))
|
---|
595 | #ifdef CONFIG_FEATURE_TAR_CREATE
|
---|
596 | # define TAR_OPT_STR_CREATE "ch"
|
---|
597 | # define TAR_OPT_AFTER_CREATE TAR_OPT_AFTER_START + 2
|
---|
598 | #else
|
---|
599 | # define TAR_OPT_STR_CREATE ""
|
---|
600 | # define TAR_OPT_AFTER_CREATE TAR_OPT_AFTER_START
|
---|
601 | #endif
|
---|
602 |
|
---|
603 | #define TAR_OPT_BZIP2 (1 << (TAR_OPT_AFTER_CREATE))
|
---|
604 | #ifdef CONFIG_FEATURE_TAR_BZIP2
|
---|
605 | # define TAR_OPT_STR_BZIP2 "j"
|
---|
606 | # define TAR_OPT_AFTER_BZIP2 TAR_OPT_AFTER_CREATE + 1
|
---|
607 | #else
|
---|
608 | # define TAR_OPT_STR_BZIP2 ""
|
---|
609 | # define TAR_OPT_AFTER_BZIP2 TAR_OPT_AFTER_CREATE
|
---|
610 | #endif
|
---|
611 |
|
---|
612 | #define TAR_OPT_LZMA (1 << (TAR_OPT_AFTER_BZIP2))
|
---|
613 | #ifdef CONFIG_FEATURE_TAR_LZMA
|
---|
614 | # define TAR_OPT_STR_LZMA "a"
|
---|
615 | # define TAR_OPT_AFTER_LZMA TAR_OPT_AFTER_BZIP2 + 1
|
---|
616 | #else
|
---|
617 | # define TAR_OPT_STR_LZMA ""
|
---|
618 | # define TAR_OPT_AFTER_LZMA TAR_OPT_AFTER_BZIP2
|
---|
619 | #endif
|
---|
620 |
|
---|
621 | #define TAR_OPT_INCLUDE_FROM (1 << (TAR_OPT_AFTER_LZMA))
|
---|
622 | #define TAR_OPT_EXCLUDE_FROM (1 << (TAR_OPT_AFTER_LZMA + 1))
|
---|
623 | #ifdef CONFIG_FEATURE_TAR_FROM
|
---|
624 | # define TAR_OPT_STR_FROM "T:X:"
|
---|
625 | # define TAR_OPT_AFTER_FROM TAR_OPT_AFTER_LZMA + 2
|
---|
626 | #else
|
---|
627 | # define TAR_OPT_STR_FROM ""
|
---|
628 | # define TAR_OPT_AFTER_FROM TAR_OPT_AFTER_LZMA
|
---|
629 | #endif
|
---|
630 |
|
---|
631 | #define TAR_OPT_GZIP (1 << (TAR_OPT_AFTER_FROM))
|
---|
632 | #ifdef CONFIG_FEATURE_TAR_GZIP
|
---|
633 | # define TAR_OPT_STR_GZIP "z"
|
---|
634 | # define TAR_OPT_AFTER_GZIP TAR_OPT_AFTER_FROM + 1
|
---|
635 | #else
|
---|
636 | # define TAR_OPT_STR_GZIP ""
|
---|
637 | # define TAR_OPT_AFTER_GZIP TAR_OPT_AFTER_FROM
|
---|
638 | #endif
|
---|
639 |
|
---|
640 | #define TAR_OPT_UNCOMPRESS (1 << (TAR_OPT_AFTER_GZIP))
|
---|
641 | #ifdef CONFIG_FEATURE_TAR_COMPRESS
|
---|
642 | # define TAR_OPT_STR_COMPRESS "Z"
|
---|
643 | # define TAR_OPT_AFTER_COMPRESS TAR_OPT_AFTER_GZIP + 1
|
---|
644 | #else
|
---|
645 | # define TAR_OPT_STR_COMPRESS ""
|
---|
646 | # define TAR_OPT_AFTER_COMPRESS TAR_OPT_AFTER_GZIP
|
---|
647 | #endif
|
---|
648 |
|
---|
649 | #define TAR_OPT_NOPRESERVE_OWN (1 << (TAR_OPT_AFTER_COMPRESS))
|
---|
650 | #define TAR_OPT_NOPRESERVE_PERM (1 << (TAR_OPT_AFTER_COMPRESS + 1))
|
---|
651 | #define TAR_OPT_STR_NOPRESERVE "\203\213"
|
---|
652 | #define TAR_OPT_AFTER_NOPRESERVE TAR_OPT_AFTER_COMPRESS + 2
|
---|
653 |
|
---|
654 | static const char tar_options[]="txC:f:Opvk" \
|
---|
655 | TAR_OPT_STR_CREATE \
|
---|
656 | TAR_OPT_STR_BZIP2 \
|
---|
657 | TAR_OPT_STR_LZMA \
|
---|
658 | TAR_OPT_STR_FROM \
|
---|
659 | TAR_OPT_STR_GZIP \
|
---|
660 | TAR_OPT_STR_COMPRESS \
|
---|
661 | TAR_OPT_STR_NOPRESERVE;
|
---|
662 |
|
---|
663 | #ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS
|
---|
664 | static const struct option tar_long_options[] = {
|
---|
665 | { "list", 0, NULL, 't' },
|
---|
666 | { "extract", 0, NULL, 'x' },
|
---|
667 | { "directory", 1, NULL, 'C' },
|
---|
668 | { "file", 1, NULL, 'f' },
|
---|
669 | { "to-stdout", 0, NULL, 'O' },
|
---|
670 | { "same-permissions", 0, NULL, 'p' },
|
---|
671 | { "verbose", 0, NULL, 'v' },
|
---|
672 | { "keep-old", 0, NULL, 'k' },
|
---|
673 | { "no-same-owner", 0, NULL, '\203' },
|
---|
674 | { "no-same-permissions",0, NULL, '\213' },
|
---|
675 | # ifdef CONFIG_FEATURE_TAR_CREATE
|
---|
676 | { "create", 0, NULL, 'c' },
|
---|
677 | { "dereference", 0, NULL, 'h' },
|
---|
678 | # endif
|
---|
679 | # ifdef CONFIG_FEATURE_TAR_BZIP2
|
---|
680 | { "bzip2", 0, NULL, 'j' },
|
---|
681 | # endif
|
---|
682 | # ifdef CONFIG_FEATURE_TAR_LZMA
|
---|
683 | { "lzma", 0, NULL, 'a' },
|
---|
684 | # endif
|
---|
685 | # ifdef CONFIG_FEATURE_TAR_FROM
|
---|
686 | { "files-from", 1, NULL, 'T' },
|
---|
687 | { "exclude-from", 1, NULL, 'X' },
|
---|
688 | { "exclude", 1, NULL, '\n' },
|
---|
689 | # endif
|
---|
690 | # ifdef CONFIG_FEATURE_TAR_GZIP
|
---|
691 | { "gzip", 0, NULL, 'z' },
|
---|
692 | # endif
|
---|
693 | # ifdef CONFIG_FEATURE_TAR_COMPRESS
|
---|
694 | { "compress", 0, NULL, 'Z' },
|
---|
695 | # endif
|
---|
696 | { 0, 0, 0, 0 }
|
---|
697 | };
|
---|
698 | #else
|
---|
699 | #define tar_long_options 0
|
---|
700 | #endif
|
---|
701 |
|
---|
702 | int tar_main(int argc, char **argv)
|
---|
703 | {
|
---|
704 | char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
|
---|
705 | archive_handle_t *tar_handle;
|
---|
706 | char *base_dir = NULL;
|
---|
707 | const char *tar_filename = "-";
|
---|
708 | unsigned long opt;
|
---|
709 | llist_t *excludes = NULL;
|
---|
710 |
|
---|
711 | /* Initialise default values */
|
---|
712 | tar_handle = init_handle();
|
---|
713 | tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS | ARCHIVE_PRESERVE_DATE | ARCHIVE_EXTRACT_UNCONDITIONAL;
|
---|
714 |
|
---|
715 | /* Prepend '-' to the first argument if required */
|
---|
716 | bb_opt_complementally = ENABLE_FEATURE_TAR_CREATE ?
|
---|
717 | "--:X::T::\n::c:t:x:?:c--tx:t--cx:x--ct" :
|
---|
718 | "--:X::T::\n::t:x:?:t--x:x--t";
|
---|
719 | if (ENABLE_FEATURE_TAR_LONG_OPTIONS)
|
---|
720 | bb_applet_long_options = tar_long_options;
|
---|
721 | opt = bb_getopt_ulflags(argc, argv, tar_options,
|
---|
722 | &base_dir, /* Change to dir <optarg> */
|
---|
723 | &tar_filename /* archive filename */
|
---|
724 | #ifdef CONFIG_FEATURE_TAR_FROM
|
---|
725 | , &(tar_handle->accept),
|
---|
726 | &(tar_handle->reject),
|
---|
727 | &excludes
|
---|
728 | #endif
|
---|
729 | );
|
---|
730 |
|
---|
731 | if (opt & CTX_TEST) {
|
---|
732 | if ((tar_handle->action_header == header_list) ||
|
---|
733 | (tar_handle->action_header == header_verbose_list))
|
---|
734 | {
|
---|
735 | tar_handle->action_header = header_verbose_list;
|
---|
736 | } else tar_handle->action_header = header_list;
|
---|
737 | }
|
---|
738 | if((opt & CTX_EXTRACT) && tar_handle->action_data != data_extract_to_stdout)
|
---|
739 | tar_handle->action_data = data_extract_all;
|
---|
740 |
|
---|
741 | if (opt & TAR_OPT_2STDOUT)
|
---|
742 | tar_handle->action_data = data_extract_to_stdout;
|
---|
743 |
|
---|
744 | if (opt & TAR_OPT_VERBOSE) {
|
---|
745 | if ((tar_handle->action_header == header_list) ||
|
---|
746 | (tar_handle->action_header == header_verbose_list))
|
---|
747 | {
|
---|
748 | tar_handle->action_header = header_verbose_list;
|
---|
749 | } else
|
---|
750 | tar_handle->action_header = header_list;
|
---|
751 | }
|
---|
752 | if (opt & TAR_OPT_KEEP_OLD)
|
---|
753 | tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL;
|
---|
754 |
|
---|
755 | if (opt & TAR_OPT_NOPRESERVE_OWN)
|
---|
756 | tar_handle->flags |= ARCHIVE_NOPRESERVE_OWN;
|
---|
757 |
|
---|
758 | if (opt & TAR_OPT_NOPRESERVE_PERM)
|
---|
759 | tar_handle->flags |= ARCHIVE_NOPRESERVE_PERM;
|
---|
760 |
|
---|
761 | if (ENABLE_FEATURE_TAR_GZIP && (opt & TAR_OPT_GZIP))
|
---|
762 | get_header_ptr = get_header_tar_gz;
|
---|
763 |
|
---|
764 | if (ENABLE_FEATURE_TAR_BZIP2 && (opt & TAR_OPT_BZIP2))
|
---|
765 | get_header_ptr = get_header_tar_bz2;
|
---|
766 |
|
---|
767 | if (ENABLE_FEATURE_TAR_LZMA && (opt & TAR_OPT_LZMA))
|
---|
768 | get_header_ptr = get_header_tar_lzma;
|
---|
769 |
|
---|
770 | if (ENABLE_FEATURE_TAR_COMPRESS && (opt & TAR_OPT_UNCOMPRESS))
|
---|
771 | get_header_ptr = get_header_tar_Z;
|
---|
772 |
|
---|
773 | if (ENABLE_FEATURE_TAR_FROM) {
|
---|
774 | tar_handle->reject = append_file_list_to_list(tar_handle->reject);
|
---|
775 | /* Append excludes to reject */
|
---|
776 | while (excludes) {
|
---|
777 | llist_t *temp = excludes->link;
|
---|
778 | excludes->link = tar_handle->reject;
|
---|
779 | tar_handle->reject = excludes;
|
---|
780 | excludes = temp;
|
---|
781 | }
|
---|
782 | tar_handle->accept = append_file_list_to_list(tar_handle->accept);
|
---|
783 | }
|
---|
784 |
|
---|
785 | /* Check if we are reading from stdin */
|
---|
786 | if (argv[optind] && *argv[optind] == '-') {
|
---|
787 | /* Default is to read from stdin, so just skip to next arg */
|
---|
788 | optind++;
|
---|
789 | }
|
---|
790 |
|
---|
791 | /* Setup an array of filenames to work with */
|
---|
792 | /* TODO: This is the same as in ar, separate function ? */
|
---|
793 | while (optind < argc) {
|
---|
794 | char *filename_ptr = last_char_is(argv[optind], '/');
|
---|
795 | if (filename_ptr > argv[optind])
|
---|
796 | *filename_ptr = '\0';
|
---|
797 |
|
---|
798 | llist_add_to(&(tar_handle->accept), argv[optind]);
|
---|
799 | optind++;
|
---|
800 | }
|
---|
801 |
|
---|
802 | if ((tar_handle->accept) || (tar_handle->reject))
|
---|
803 | tar_handle->filter = filter_accept_reject_list;
|
---|
804 |
|
---|
805 | /* Open the tar file */
|
---|
806 | {
|
---|
807 | FILE *tar_stream;
|
---|
808 | int flags;
|
---|
809 |
|
---|
810 | if (ENABLE_FEATURE_TAR_CREATE && (opt & CTX_CREATE)) {
|
---|
811 | /* Make sure there is at least one file to tar up. */
|
---|
812 | if (tar_handle->accept == NULL)
|
---|
813 | bb_error_msg_and_die("empty archive");
|
---|
814 |
|
---|
815 | tar_stream = stdout;
|
---|
816 | flags = O_WRONLY | O_CREAT | O_EXCL;
|
---|
817 | unlink(tar_filename);
|
---|
818 | } else {
|
---|
819 | tar_stream = stdin;
|
---|
820 | flags = O_RDONLY;
|
---|
821 | }
|
---|
822 |
|
---|
823 | if ((tar_filename[0] == '-') && (tar_filename[1] == '\0')) {
|
---|
824 | tar_handle->src_fd = fileno(tar_stream);
|
---|
825 | tar_handle->seek = seek_by_char;
|
---|
826 | } else {
|
---|
827 | tar_handle->src_fd = bb_xopen(tar_filename, flags);
|
---|
828 | }
|
---|
829 | }
|
---|
830 |
|
---|
831 | if (base_dir)
|
---|
832 | bb_xchdir(base_dir);
|
---|
833 |
|
---|
834 | /* create an archive */
|
---|
835 | if (ENABLE_FEATURE_TAR_CREATE && (opt & CTX_CREATE)) {
|
---|
836 | int verboseFlag = FALSE;
|
---|
837 | int zipMode = 0;
|
---|
838 |
|
---|
839 | if (ENABLE_FEATURE_TAR_GZIP && get_header_ptr == get_header_tar_gz)
|
---|
840 | zipMode = 1;
|
---|
841 | if (ENABLE_FEATURE_TAR_BZIP2 && get_header_ptr == get_header_tar_bz2)
|
---|
842 | zipMode = 2;
|
---|
843 |
|
---|
844 | if ((tar_handle->action_header == header_list) ||
|
---|
845 | (tar_handle->action_header == header_verbose_list))
|
---|
846 | {
|
---|
847 | verboseFlag = TRUE;
|
---|
848 | }
|
---|
849 | writeTarFile(tar_handle->src_fd, verboseFlag, opt & TAR_OPT_DEREFERENCE,
|
---|
850 | tar_handle->accept,
|
---|
851 | tar_handle->reject, zipMode);
|
---|
852 | } else {
|
---|
853 | while (get_header_ptr(tar_handle) == EXIT_SUCCESS);
|
---|
854 |
|
---|
855 | /* Check that every file that should have been extracted was */
|
---|
856 | while (tar_handle->accept) {
|
---|
857 | if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
|
---|
858 | && !find_list_entry(tar_handle->passed, tar_handle->accept->data))
|
---|
859 | {
|
---|
860 | bb_error_msg_and_die("%s: Not found in archive", tar_handle->accept->data);
|
---|
861 | }
|
---|
862 | tar_handle->accept = tar_handle->accept->link;
|
---|
863 | }
|
---|
864 | }
|
---|
865 |
|
---|
866 | if (ENABLE_FEATURE_CLEAN_UP && tar_handle->src_fd != STDIN_FILENO)
|
---|
867 | close(tar_handle->src_fd);
|
---|
868 |
|
---|
869 | return(EXIT_SUCCESS);
|
---|
870 | }
|
---|