[821] | 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++)
|
---|
| 408 | write(tbInfo->tarFd, "\0", 1);
|
---|
| 409 | }
|
---|
| 410 |
|
---|
| 411 | return (TRUE);
|
---|
| 412 | }
|
---|
| 413 |
|
---|
| 414 | static inline int writeTarFile(const int tar_fd, const int verboseFlag,
|
---|
| 415 | const unsigned long dereferenceFlag, const llist_t *include,
|
---|
| 416 | const llist_t *exclude, const int gzip)
|
---|
| 417 | {
|
---|
| 418 | pid_t gzipPid = 0;
|
---|
| 419 |
|
---|
| 420 | int errorFlag = FALSE;
|
---|
| 421 | ssize_t size;
|
---|
| 422 | struct TarBallInfo tbInfo;
|
---|
| 423 |
|
---|
| 424 | tbInfo.hlInfoHead = NULL;
|
---|
| 425 |
|
---|
| 426 | fchmod(tar_fd, 0644);
|
---|
| 427 | tbInfo.tarFd = tar_fd;
|
---|
| 428 | tbInfo.verboseFlag = verboseFlag;
|
---|
| 429 |
|
---|
| 430 | /* Store the stat info for the tarball's file, so
|
---|
| 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 | }
|
---|