[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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[1770] | 26 | #include <fnmatch.h>
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[821] | 27 | #include <getopt.h>
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[1770] | 28 | #include "libbb.h"
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[821] | 29 | #include "unarchive.h"
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| 30 |
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[1770] | 31 | #define block_buf bb_common_bufsiz1
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[821] | 32 |
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[1770] | 33 | #if ENABLE_FEATURE_TAR_CREATE
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| 34 |
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[821] | 35 | /* Tar file constants */
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| 36 |
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| 37 | #define TAR_BLOCK_SIZE 512
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| 38 |
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| 39 | /* POSIX tar Header Block, from POSIX 1003.1-1990 */
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[1770] | 40 | #define NAME_SIZE 100
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| 41 | #define NAME_SIZE_STR "100"
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| 42 | typedef struct TarHeader TarHeader;
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| 43 | struct TarHeader { /* byte offset */
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| 44 | char name[NAME_SIZE]; /* 0-99 */
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| 45 | char mode[8]; /* 100-107 */
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| 46 | char uid[8]; /* 108-115 */
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| 47 | char gid[8]; /* 116-123 */
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| 48 | char size[12]; /* 124-135 */
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| 49 | char mtime[12]; /* 136-147 */
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| 50 | char chksum[8]; /* 148-155 */
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| 51 | char typeflag; /* 156-156 */
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| 52 | char linkname[NAME_SIZE]; /* 157-256 */
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| 53 | char magic[6]; /* 257-262 */
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| 54 | char version[2]; /* 263-264 */
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| 55 | char uname[32]; /* 265-296 */
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| 56 | char gname[32]; /* 297-328 */
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| 57 | char devmajor[8]; /* 329-336 */
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| 58 | char devminor[8]; /* 337-344 */
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| 59 | char prefix[155]; /* 345-499 */
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| 60 | char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
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[821] | 61 | };
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| 62 |
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| 63 | /*
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[1770] | 64 | ** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
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[821] | 65 | ** the only functions that deal with the HardLinkInfo structure.
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| 66 | ** Even these functions use the xxxHardLinkInfo() functions.
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| 67 | */
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| 68 | typedef struct HardLinkInfo HardLinkInfo;
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| 69 | struct HardLinkInfo {
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| 70 | HardLinkInfo *next; /* Next entry in list */
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| 71 | dev_t dev; /* Device number */
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| 72 | ino_t ino; /* Inode number */
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| 73 | short linkCount; /* (Hard) Link Count */
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| 74 | char name[1]; /* Start of filename (must be last) */
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| 75 | };
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| 76 |
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| 77 | /* Some info to be carried along when creating a new tarball */
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[1770] | 78 | typedef struct TarBallInfo TarBallInfo;
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[821] | 79 | struct TarBallInfo {
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| 80 | int tarFd; /* Open-for-write file descriptor
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| 81 | for the tarball */
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| 82 | struct stat statBuf; /* Stat info for the tarball, letting
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| 83 | us know the inode and device that the
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| 84 | tarball lives, so we can avoid trying
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| 85 | to include the tarball into itself */
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| 86 | int verboseFlag; /* Whether to print extra stuff or not */
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| 87 | const llist_t *excludeList; /* List of files to not include */
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| 88 | HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
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| 89 | HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
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| 90 | };
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| 91 |
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| 92 | /* A nice enum with all the possible tar file content types */
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| 93 | enum TarFileType {
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| 94 | REGTYPE = '0', /* regular file */
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| 95 | REGTYPE0 = '\0', /* regular file (ancient bug compat) */
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| 96 | LNKTYPE = '1', /* hard link */
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| 97 | SYMTYPE = '2', /* symbolic link */
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| 98 | CHRTYPE = '3', /* character special */
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| 99 | BLKTYPE = '4', /* block special */
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| 100 | DIRTYPE = '5', /* directory */
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| 101 | FIFOTYPE = '6', /* FIFO special */
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| 102 | CONTTYPE = '7', /* reserved */
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| 103 | GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
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| 104 | GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
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| 105 | };
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| 106 | typedef enum TarFileType TarFileType;
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| 107 |
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| 108 | /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
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[1770] | 109 | static void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
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[821] | 110 | struct stat *statbuf,
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[1770] | 111 | const char *fileName)
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[821] | 112 | {
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| 113 | /* Note: hlInfoHeadPtr can never be NULL! */
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| 114 | HardLinkInfo *hlInfo;
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| 115 |
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[1770] | 116 | hlInfo = xmalloc(sizeof(HardLinkInfo) + strlen(fileName));
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[821] | 117 | hlInfo->next = *hlInfoHeadPtr;
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| 118 | *hlInfoHeadPtr = hlInfo;
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| 119 | hlInfo->dev = statbuf->st_dev;
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| 120 | hlInfo->ino = statbuf->st_ino;
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| 121 | hlInfo->linkCount = statbuf->st_nlink;
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[1770] | 122 | strcpy(hlInfo->name, fileName);
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[821] | 123 | }
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| 124 |
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| 125 | static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
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| 126 | {
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[1770] | 127 | HardLinkInfo *hlInfo;
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| 128 | HardLinkInfo *hlInfoNext;
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[821] | 129 |
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| 130 | if (hlInfoHeadPtr) {
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| 131 | hlInfo = *hlInfoHeadPtr;
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| 132 | while (hlInfo) {
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| 133 | hlInfoNext = hlInfo->next;
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| 134 | free(hlInfo);
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| 135 | hlInfo = hlInfoNext;
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| 136 | }
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| 137 | *hlInfoHeadPtr = NULL;
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| 138 | }
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| 139 | }
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| 140 |
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| 141 | /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
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[1770] | 142 | static HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
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[821] | 143 | {
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| 144 | while (hlInfo) {
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| 145 | if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
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| 146 | break;
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| 147 | hlInfo = hlInfo->next;
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| 148 | }
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[1770] | 149 | return hlInfo;
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[821] | 150 | }
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| 151 |
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| 152 | /* Put an octal string into the specified buffer.
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[1770] | 153 | * The number is zero padded and possibly null terminated.
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| 154 | * Stores low-order bits only if whole value does not fit. */
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| 155 | static void putOctal(char *cp, int len, off_t value)
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[821] | 156 | {
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[1770] | 157 | char tempBuffer[sizeof(off_t)*3+1];
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[821] | 158 | char *tempString = tempBuffer;
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[1770] | 159 | int width;
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[821] | 160 |
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[1770] | 161 | width = sprintf(tempBuffer, "%0*"OFF_FMT"o", len, value);
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| 162 | tempString += (width - len);
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[821] | 163 |
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[1770] | 164 | /* If string has leading zeroes, we can drop one */
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| 165 | /* and field will have trailing '\0' */
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| 166 | /* (increases chances of compat with other tars) */
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| 167 | if (tempString[0] == '0')
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[821] | 168 | tempString++;
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| 169 |
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[1770] | 170 | /* Copy the string to the field */
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| 171 | memcpy(cp, tempString, len);
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| 172 | }
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| 173 | #define PUT_OCTAL(a, b) putOctal((a), sizeof(a), (b))
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[821] | 174 |
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[1770] | 175 | static void chksum_and_xwrite(int fd, struct TarHeader* hp)
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| 176 | {
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| 177 | /* POSIX says that checksum is done on unsigned bytes
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| 178 | * (Sun and HP-UX gets it wrong... more details in
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| 179 | * GNU tar source) */
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| 180 | const unsigned char *cp;
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| 181 | int chksum, size;
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[821] | 182 |
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[1770] | 183 | strcpy(hp->magic, "ustar ");
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[821] | 184 |
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[1770] | 185 | /* Calculate and store the checksum (i.e., the sum of all of the bytes of
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| 186 | * the header). The checksum field must be filled with blanks for the
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| 187 | * calculation. The checksum field is formatted differently from the
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| 188 | * other fields: it has 6 digits, a null, then a space -- rather than
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| 189 | * digits, followed by a null like the other fields... */
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| 190 | memset(hp->chksum, ' ', sizeof(hp->chksum));
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| 191 | cp = (const unsigned char *) hp;
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| 192 | chksum = 0;
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| 193 | size = sizeof(*hp);
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| 194 | do { chksum += *cp++; } while (--size);
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| 195 | putOctal(hp->chksum, sizeof(hp->chksum)-1, chksum);
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| 196 |
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| 197 | /* Now write the header out to disk */
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| 198 | xwrite(fd, hp, sizeof(*hp));
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[821] | 199 | }
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| 200 |
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[1770] | 201 | #if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
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| 202 | static void writeLongname(int fd, int type, const char *name, int dir)
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[821] | 203 | {
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[1770] | 204 | static const struct {
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| 205 | char mode[8]; /* 100-107 */
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| 206 | char uid[8]; /* 108-115 */
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| 207 | char gid[8]; /* 116-123 */
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| 208 | char size[12]; /* 124-135 */
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| 209 | char mtime[12]; /* 136-147 */
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| 210 | } prefilled = {
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| 211 | "0000000",
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| 212 | "0000000",
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| 213 | "0000000",
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| 214 | "00000000000",
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| 215 | "00000000000",
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| 216 | };
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[821] | 217 | struct TarHeader header;
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[1770] | 218 | int size;
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[821] | 219 |
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[1770] | 220 | dir = !!dir; /* normalize: 0/1 */
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| 221 | size = strlen(name) + 1 + dir; /* GNU tar uses strlen+1 */
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| 222 | /* + dir: account for possible '/' */
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| 223 |
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| 224 | memset(&header, 0, sizeof(header));
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| 225 | strcpy(header.name, "././@LongLink");
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| 226 | memcpy(header.mode, prefilled.mode, sizeof(prefilled));
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| 227 | PUT_OCTAL(header.size, size);
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| 228 | header.typeflag = type;
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| 229 | chksum_and_xwrite(fd, &header);
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| 230 |
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| 231 | /* Write filename[/] and pad the block. */
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| 232 | /* dir=0: writes 'name<NUL>', pads */
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| 233 | /* dir=1: writes 'name', writes '/<NUL>', pads */
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| 234 | dir *= 2;
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| 235 | xwrite(fd, name, size - dir);
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| 236 | xwrite(fd, "/", dir);
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| 237 | size = (-size) & (TAR_BLOCK_SIZE-1);
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[821] | 238 | memset(&header, 0, size);
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[1770] | 239 | xwrite(fd, &header, size);
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| 240 | }
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| 241 | #endif
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[821] | 242 |
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[1770] | 243 | /* Write out a tar header for the specified file/directory/whatever */
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| 244 | void BUG_tar_header_size(void);
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| 245 | static int writeTarHeader(struct TarBallInfo *tbInfo,
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| 246 | const char *header_name, const char *fileName, struct stat *statbuf)
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| 247 | {
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| 248 | struct TarHeader header;
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[821] | 249 |
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[1770] | 250 | if (sizeof(header) != 512)
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| 251 | BUG_tar_header_size();
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[821] | 252 |
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[1770] | 253 | memset(&header, 0, sizeof(struct TarHeader));
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[821] | 254 |
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[1770] | 255 | strncpy(header.name, header_name, sizeof(header.name));
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| 256 |
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| 257 | /* POSIX says to mask mode with 07777. */
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| 258 | PUT_OCTAL(header.mode, statbuf->st_mode & 07777);
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| 259 | PUT_OCTAL(header.uid, statbuf->st_uid);
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| 260 | PUT_OCTAL(header.gid, statbuf->st_gid);
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| 261 | memset(header.size, '0', sizeof(header.size)-1); /* Regular file size is handled later */
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| 262 | PUT_OCTAL(header.mtime, statbuf->st_mtime);
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| 263 |
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| 264 | /* Enter the user and group names */
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| 265 | safe_strncpy(header.uname, get_cached_username(statbuf->st_uid), sizeof(header.uname));
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| 266 | safe_strncpy(header.gname, get_cached_groupname(statbuf->st_gid), sizeof(header.gname));
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| 267 |
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[821] | 268 | if (tbInfo->hlInfo) {
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| 269 | /* This is a hard link */
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| 270 | header.typeflag = LNKTYPE;
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| 271 | strncpy(header.linkname, tbInfo->hlInfo->name,
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| 272 | sizeof(header.linkname));
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[1770] | 273 | #if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
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| 274 | /* Write out long linkname if needed */
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| 275 | if (header.linkname[sizeof(header.linkname)-1])
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| 276 | writeLongname(tbInfo->tarFd, GNULONGLINK,
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| 277 | tbInfo->hlInfo->name, 0);
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| 278 | #endif
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[821] | 279 | } else if (S_ISLNK(statbuf->st_mode)) {
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[1770] | 280 | char *lpath = xmalloc_readlink_or_warn(fileName);
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| 281 | if (!lpath)
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| 282 | return FALSE;
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[821] | 283 | header.typeflag = SYMTYPE;
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| 284 | strncpy(header.linkname, lpath, sizeof(header.linkname));
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[1770] | 285 | #if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
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| 286 | /* Write out long linkname if needed */
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| 287 | if (header.linkname[sizeof(header.linkname)-1])
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| 288 | writeLongname(tbInfo->tarFd, GNULONGLINK, lpath, 0);
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| 289 | #else
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| 290 | /* If it is larger than 100 bytes, bail out */
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| 291 | if (header.linkname[sizeof(header.linkname)-1]) {
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| 292 | free(lpath);
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| 293 | bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
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| 294 | return FALSE;
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| 295 | }
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| 296 | #endif
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[821] | 297 | free(lpath);
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| 298 | } else if (S_ISDIR(statbuf->st_mode)) {
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| 299 | header.typeflag = DIRTYPE;
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[1770] | 300 | /* Append '/' only if there is a space for it */
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| 301 | if (!header.name[sizeof(header.name)-1])
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| 302 | header.name[strlen(header.name)] = '/';
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[821] | 303 | } else if (S_ISCHR(statbuf->st_mode)) {
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| 304 | header.typeflag = CHRTYPE;
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[1770] | 305 | PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
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| 306 | PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
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[821] | 307 | } else if (S_ISBLK(statbuf->st_mode)) {
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| 308 | header.typeflag = BLKTYPE;
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[1770] | 309 | PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
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| 310 | PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
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[821] | 311 | } else if (S_ISFIFO(statbuf->st_mode)) {
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| 312 | header.typeflag = FIFOTYPE;
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| 313 | } else if (S_ISREG(statbuf->st_mode)) {
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[1770] | 314 | if (sizeof(statbuf->st_size) > 4
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| 315 | && statbuf->st_size > (off_t)0777777777777LL
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| 316 | ) {
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| 317 | bb_error_msg_and_die("cannot store file '%s' "
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| 318 | "of size %"OFF_FMT"d, aborting",
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| 319 | fileName, statbuf->st_size);
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| 320 | }
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[821] | 321 | header.typeflag = REGTYPE;
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[1770] | 322 | PUT_OCTAL(header.size, statbuf->st_size);
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[821] | 323 | } else {
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[1770] | 324 | bb_error_msg("%s: unknown file type", fileName);
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| 325 | return FALSE;
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[821] | 326 | }
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| 327 |
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[1770] | 328 | #if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
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| 329 | /* Write out long name if needed */
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| 330 | /* (we, like GNU tar, output long linkname *before* long name) */
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| 331 | if (header.name[sizeof(header.name)-1])
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| 332 | writeLongname(tbInfo->tarFd, GNULONGNAME,
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| 333 | header_name, S_ISDIR(statbuf->st_mode));
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| 334 | #endif
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[821] | 335 |
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| 336 | /* Now write the header out to disk */
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[1770] | 337 | chksum_and_xwrite(tbInfo->tarFd, &header);
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| 338 |
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[821] | 339 | /* Now do the verbose thing (or not) */
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| 340 | if (tbInfo->verboseFlag) {
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| 341 | FILE *vbFd = stdout;
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| 342 |
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| 343 | if (tbInfo->tarFd == STDOUT_FILENO) /* If the archive goes to stdout, verbose to stderr */
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| 344 | vbFd = stderr;
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[1770] | 345 | /* GNU "tar cvvf" prints "extended" listing a-la "ls -l" */
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| 346 | /* We don't have such excesses here: for us "v" == "vv" */
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| 347 | /* '/' is probably a GNUism */
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| 348 | fprintf(vbFd, "%s%s\n", header_name,
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| 349 | S_ISDIR(statbuf->st_mode) ? "/" : "");
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[821] | 350 | }
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| 351 |
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[1770] | 352 | return TRUE;
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[821] | 353 | }
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| 354 |
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[1770] | 355 | #if ENABLE_FEATURE_TAR_FROM
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| 356 | static int exclude_file(const llist_t *excluded_files, const char *file)
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[821] | 357 | {
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| 358 | while (excluded_files) {
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| 359 | if (excluded_files->data[0] == '/') {
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| 360 | if (fnmatch(excluded_files->data, file,
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| 361 | FNM_PATHNAME | FNM_LEADING_DIR) == 0)
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| 362 | return 1;
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| 363 | } else {
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| 364 | const char *p;
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| 365 |
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| 366 | for (p = file; p[0] != '\0'; p++) {
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| 367 | if ((p == file || p[-1] == '/') && p[0] != '/' &&
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| 368 | fnmatch(excluded_files->data, p,
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| 369 | FNM_PATHNAME | FNM_LEADING_DIR) == 0)
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| 370 | return 1;
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| 371 | }
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| 372 | }
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| 373 | excluded_files = excluded_files->link;
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| 374 | }
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| 375 |
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| 376 | return 0;
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| 377 | }
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[1770] | 378 | #else
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[821] | 379 | #define exclude_file(excluded_files, file) 0
|
---|
[1770] | 380 | #endif
|
---|
[821] | 381 |
|
---|
| 382 | static int writeFileToTarball(const char *fileName, struct stat *statbuf,
|
---|
[1770] | 383 | void *userData, int depth ATTRIBUTE_UNUSED)
|
---|
[821] | 384 | {
|
---|
| 385 | struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
|
---|
| 386 | const char *header_name;
|
---|
| 387 | int inputFileFd = -1;
|
---|
| 388 |
|
---|
| 389 | /*
|
---|
[1770] | 390 | * Check to see if we are dealing with a hard link.
|
---|
| 391 | * If so -
|
---|
| 392 | * Treat the first occurance of a given dev/inode as a file while
|
---|
| 393 | * treating any additional occurances as hard links. This is done
|
---|
| 394 | * by adding the file information to the HardLinkInfo linked list.
|
---|
[821] | 395 | */
|
---|
| 396 | tbInfo->hlInfo = NULL;
|
---|
| 397 | if (statbuf->st_nlink > 1) {
|
---|
| 398 | tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
|
---|
| 399 | if (tbInfo->hlInfo == NULL)
|
---|
| 400 | addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
|
---|
| 401 | }
|
---|
| 402 |
|
---|
| 403 | /* It is against the rules to archive a socket */
|
---|
| 404 | if (S_ISSOCK(statbuf->st_mode)) {
|
---|
| 405 | bb_error_msg("%s: socket ignored", fileName);
|
---|
[1770] | 406 | return TRUE;
|
---|
[821] | 407 | }
|
---|
| 408 |
|
---|
| 409 | /* It is a bad idea to store the archive we are in the process of creating,
|
---|
| 410 | * so check the device and inode to be sure that this particular file isn't
|
---|
| 411 | * the new tarball */
|
---|
| 412 | if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
|
---|
| 413 | tbInfo->statBuf.st_ino == statbuf->st_ino) {
|
---|
| 414 | bb_error_msg("%s: file is the archive; skipping", fileName);
|
---|
[1770] | 415 | return TRUE;
|
---|
[821] | 416 | }
|
---|
| 417 |
|
---|
| 418 | header_name = fileName;
|
---|
| 419 | while (header_name[0] == '/') {
|
---|
[1770] | 420 | static smallint warned;
|
---|
[821] | 421 |
|
---|
[1770] | 422 | if (!warned) {
|
---|
| 423 | bb_error_msg("removing leading '/' from member names");
|
---|
| 424 | warned = 1;
|
---|
[821] | 425 | }
|
---|
| 426 | header_name++;
|
---|
| 427 | }
|
---|
| 428 |
|
---|
[1770] | 429 | #if !ENABLE_FEATURE_TAR_GNU_EXTENSIONS
|
---|
[821] | 430 | if (strlen(fileName) >= NAME_SIZE) {
|
---|
[1770] | 431 | bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
|
---|
| 432 | return TRUE;
|
---|
[821] | 433 | }
|
---|
[1770] | 434 | #endif
|
---|
[821] | 435 |
|
---|
| 436 | if (header_name[0] == '\0')
|
---|
| 437 | return TRUE;
|
---|
| 438 |
|
---|
[1770] | 439 | if (exclude_file(tbInfo->excludeList, header_name))
|
---|
[821] | 440 | return SKIP;
|
---|
| 441 |
|
---|
| 442 | /* Is this a regular file? */
|
---|
[1770] | 443 | if (tbInfo->hlInfo == NULL && S_ISREG(statbuf->st_mode)) {
|
---|
[821] | 444 | /* open the file we want to archive, and make sure all is well */
|
---|
[1770] | 445 | inputFileFd = open_or_warn(fileName, O_RDONLY);
|
---|
| 446 | if (inputFileFd < 0) {
|
---|
| 447 | return FALSE;
|
---|
[821] | 448 | }
|
---|
| 449 | }
|
---|
| 450 |
|
---|
| 451 | /* Add an entry to the tarball */
|
---|
| 452 | if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
|
---|
[1770] | 453 | return FALSE;
|
---|
[821] | 454 | }
|
---|
| 455 |
|
---|
| 456 | /* If it was a regular file, write out the body */
|
---|
[1770] | 457 | if (inputFileFd >= 0) {
|
---|
| 458 | size_t readSize;
|
---|
| 459 | /* Write the file to the archive. */
|
---|
| 460 | /* We record size into header first, */
|
---|
| 461 | /* and then write out file. If file shrinks in between, */
|
---|
| 462 | /* tar will be corrupted. So we don't allow for that. */
|
---|
| 463 | /* NB: GNU tar 1.16 warns and pads with zeroes */
|
---|
| 464 | /* or even seeks back and updates header */
|
---|
| 465 | bb_copyfd_exact_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
|
---|
| 466 | ////off_t readSize;
|
---|
| 467 | ////readSize = bb_copyfd_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
|
---|
| 468 | ////if (readSize != statbuf->st_size && readSize >= 0) {
|
---|
| 469 | //// bb_error_msg_and_die("short read from %s, aborting", fileName);
|
---|
| 470 | ////}
|
---|
[821] | 471 |
|
---|
[1770] | 472 | /* Check that file did not grow in between? */
|
---|
| 473 | /* if (safe_read(inputFileFd, 1) == 1) warn but continue? */
|
---|
| 474 |
|
---|
[821] | 475 | close(inputFileFd);
|
---|
| 476 |
|
---|
| 477 | /* Pad the file up to the tar block size */
|
---|
[1770] | 478 | /* (a few tricks here in the name of code size) */
|
---|
| 479 | readSize = (-(int)statbuf->st_size) & (TAR_BLOCK_SIZE-1);
|
---|
| 480 | memset(block_buf, 0, readSize);
|
---|
| 481 | xwrite(tbInfo->tarFd, block_buf, readSize);
|
---|
[821] | 482 | }
|
---|
| 483 |
|
---|
[1770] | 484 | return TRUE;
|
---|
[821] | 485 | }
|
---|
| 486 |
|
---|
[1770] | 487 | static int writeTarFile(const int tar_fd, const int verboseFlag,
|
---|
[821] | 488 | const unsigned long dereferenceFlag, const llist_t *include,
|
---|
| 489 | const llist_t *exclude, const int gzip)
|
---|
| 490 | {
|
---|
| 491 | pid_t gzipPid = 0;
|
---|
| 492 | int errorFlag = FALSE;
|
---|
| 493 | struct TarBallInfo tbInfo;
|
---|
| 494 |
|
---|
| 495 | tbInfo.hlInfoHead = NULL;
|
---|
| 496 |
|
---|
| 497 | fchmod(tar_fd, 0644);
|
---|
| 498 | tbInfo.tarFd = tar_fd;
|
---|
| 499 | tbInfo.verboseFlag = verboseFlag;
|
---|
| 500 |
|
---|
| 501 | /* Store the stat info for the tarball's file, so
|
---|
| 502 | * can avoid including the tarball into itself.... */
|
---|
| 503 | if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
|
---|
[1770] | 504 | bb_perror_msg_and_die("cannot stat tar file");
|
---|
[821] | 505 |
|
---|
| 506 | if ((ENABLE_FEATURE_TAR_GZIP || ENABLE_FEATURE_TAR_BZIP2) && gzip) {
|
---|
| 507 | int gzipDataPipe[2] = { -1, -1 };
|
---|
| 508 | int gzipStatusPipe[2] = { -1, -1 };
|
---|
| 509 | volatile int vfork_exec_errno = 0;
|
---|
[1770] | 510 | const char *zip_exec = (gzip == 1) ? "gzip" : "bzip2";
|
---|
[821] | 511 |
|
---|
[1770] | 512 | xpipe(gzipDataPipe);
|
---|
| 513 | xpipe(gzipStatusPipe);
|
---|
[821] | 514 |
|
---|
[1770] | 515 | signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
|
---|
[821] | 516 |
|
---|
[1770] | 517 | #if defined(__GNUC__) && __GNUC__
|
---|
| 518 | /* Avoid vfork clobbering */
|
---|
| 519 | (void) &include;
|
---|
| 520 | (void) &errorFlag;
|
---|
| 521 | (void) &zip_exec;
|
---|
| 522 | #endif
|
---|
[821] | 523 |
|
---|
| 524 | gzipPid = vfork();
|
---|
| 525 |
|
---|
| 526 | if (gzipPid == 0) {
|
---|
| 527 | dup2(gzipDataPipe[0], 0);
|
---|
| 528 | close(gzipDataPipe[1]);
|
---|
| 529 |
|
---|
[1770] | 530 | dup2(tbInfo.tarFd, 1);
|
---|
[821] | 531 |
|
---|
| 532 | close(gzipStatusPipe[0]);
|
---|
| 533 | fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows success */
|
---|
| 534 |
|
---|
[1770] | 535 | BB_EXECLP(zip_exec, zip_exec, "-f", NULL);
|
---|
[821] | 536 | vfork_exec_errno = errno;
|
---|
| 537 |
|
---|
| 538 | close(gzipStatusPipe[1]);
|
---|
| 539 | exit(-1);
|
---|
| 540 | } else if (gzipPid > 0) {
|
---|
| 541 | close(gzipDataPipe[0]);
|
---|
| 542 | close(gzipStatusPipe[1]);
|
---|
| 543 |
|
---|
| 544 | while (1) {
|
---|
| 545 | char buf;
|
---|
| 546 |
|
---|
[1770] | 547 | int n = full_read(gzipStatusPipe[0], &buf, 1);
|
---|
[821] | 548 |
|
---|
| 549 | if (n == 0 && vfork_exec_errno != 0) {
|
---|
| 550 | errno = vfork_exec_errno;
|
---|
[1770] | 551 | bb_perror_msg_and_die("cannot exec %s", zip_exec);
|
---|
[821] | 552 | } else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
|
---|
| 553 | continue; /* try it again */
|
---|
| 554 | break;
|
---|
| 555 | }
|
---|
| 556 | close(gzipStatusPipe[0]);
|
---|
| 557 |
|
---|
| 558 | tbInfo.tarFd = gzipDataPipe[1];
|
---|
| 559 | } else bb_perror_msg_and_die("vfork gzip");
|
---|
| 560 | }
|
---|
| 561 |
|
---|
| 562 | tbInfo.excludeList = exclude;
|
---|
| 563 |
|
---|
| 564 | /* Read the directory/files and iterate over them one at a time */
|
---|
| 565 | while (include) {
|
---|
[1770] | 566 | if (!recursive_action(include->data, ACTION_RECURSE |
|
---|
| 567 | (dereferenceFlag ? ACTION_FOLLOWLINKS : 0),
|
---|
| 568 | writeFileToTarball, writeFileToTarball, &tbInfo, 0))
|
---|
[821] | 569 | {
|
---|
| 570 | errorFlag = TRUE;
|
---|
| 571 | }
|
---|
| 572 | include = include->link;
|
---|
| 573 | }
|
---|
| 574 | /* Write two empty blocks to the end of the archive */
|
---|
[1770] | 575 | memset(block_buf, 0, 2*TAR_BLOCK_SIZE);
|
---|
| 576 | xwrite(tbInfo.tarFd, block_buf, 2*TAR_BLOCK_SIZE);
|
---|
[821] | 577 |
|
---|
| 578 | /* To be pedantically correct, we would check if the tarball
|
---|
| 579 | * is smaller than 20 tar blocks, and pad it if it was smaller,
|
---|
| 580 | * but that isn't necessary for GNU tar interoperability, and
|
---|
| 581 | * so is considered a waste of space */
|
---|
| 582 |
|
---|
| 583 | /* Close so the child process (if any) will exit */
|
---|
| 584 | close(tbInfo.tarFd);
|
---|
| 585 |
|
---|
| 586 | /* Hang up the tools, close up shop, head home */
|
---|
| 587 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 588 | freeHardLinkInfo(&tbInfo.hlInfoHead);
|
---|
| 589 |
|
---|
| 590 | if (errorFlag)
|
---|
[1770] | 591 | bb_error_msg("error exit delayed from previous errors");
|
---|
[821] | 592 |
|
---|
[1770] | 593 | if (gzipPid) {
|
---|
| 594 | int status;
|
---|
| 595 | if (waitpid(gzipPid, &status, 0) == -1)
|
---|
| 596 | bb_perror_msg("waitpid");
|
---|
| 597 | else if (!WIFEXITED(status) || WEXITSTATUS(status))
|
---|
| 598 | /* gzip was killed or has exited with nonzero! */
|
---|
| 599 | errorFlag = TRUE;
|
---|
| 600 | }
|
---|
| 601 | return errorFlag;
|
---|
[821] | 602 | }
|
---|
| 603 | #else
|
---|
| 604 | int writeTarFile(const int tar_fd, const int verboseFlag,
|
---|
| 605 | const unsigned long dereferenceFlag, const llist_t *include,
|
---|
| 606 | const llist_t *exclude, const int gzip);
|
---|
[1770] | 607 | #endif /* FEATURE_TAR_CREATE */
|
---|
[821] | 608 |
|
---|
[1770] | 609 | #if ENABLE_FEATURE_TAR_FROM
|
---|
[821] | 610 | static llist_t *append_file_list_to_list(llist_t *list)
|
---|
| 611 | {
|
---|
| 612 | FILE *src_stream;
|
---|
| 613 | llist_t *cur = list;
|
---|
| 614 | llist_t *tmp;
|
---|
| 615 | char *line;
|
---|
| 616 | llist_t *newlist = NULL;
|
---|
| 617 |
|
---|
| 618 | while (cur) {
|
---|
[1770] | 619 | src_stream = xfopen(cur->data, "r");
|
---|
[821] | 620 | tmp = cur;
|
---|
| 621 | cur = cur->link;
|
---|
| 622 | free(tmp);
|
---|
[1770] | 623 | while ((line = xmalloc_getline(src_stream)) != NULL) {
|
---|
| 624 | /* kill trailing '/' unless the string is just "/" */
|
---|
| 625 | char *cp = last_char_is(line, '/');
|
---|
| 626 | if (cp > line)
|
---|
| 627 | *cp = '\0';
|
---|
| 628 | llist_add_to(&newlist, line);
|
---|
| 629 | }
|
---|
[821] | 630 | fclose(src_stream);
|
---|
| 631 | }
|
---|
| 632 | return newlist;
|
---|
| 633 | }
|
---|
| 634 | #else
|
---|
[1770] | 635 | #define append_file_list_to_list(x) 0
|
---|
[821] | 636 | #endif
|
---|
| 637 |
|
---|
[1770] | 638 | #if ENABLE_FEATURE_TAR_COMPRESS
|
---|
[821] | 639 | static char get_header_tar_Z(archive_handle_t *archive_handle)
|
---|
| 640 | {
|
---|
[1770] | 641 | /* Can't lseek over pipes */
|
---|
| 642 | archive_handle->seek = seek_by_read;
|
---|
[821] | 643 |
|
---|
| 644 | /* do the decompression, and cleanup */
|
---|
[1770] | 645 | if (xread_char(archive_handle->src_fd) != 0x1f
|
---|
| 646 | || xread_char(archive_handle->src_fd) != 0x9d
|
---|
| 647 | ) {
|
---|
| 648 | bb_error_msg_and_die("invalid magic");
|
---|
[821] | 649 | }
|
---|
| 650 |
|
---|
[1770] | 651 | archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress, "uncompress", "uncompress", "-cf", "-", NULL);
|
---|
[821] | 652 | archive_handle->offset = 0;
|
---|
[1770] | 653 | while (get_header_tar(archive_handle) == EXIT_SUCCESS)
|
---|
| 654 | /* nothing */;
|
---|
[821] | 655 |
|
---|
| 656 | /* Can only do one file at a time */
|
---|
[1770] | 657 | return EXIT_FAILURE;
|
---|
[821] | 658 | }
|
---|
| 659 | #else
|
---|
[1770] | 660 | #define get_header_tar_Z NULL
|
---|
[821] | 661 | #endif
|
---|
| 662 |
|
---|
[1770] | 663 | #ifdef CHECK_FOR_CHILD_EXITCODE
|
---|
| 664 | /* Looks like it isn't needed - tar detects malformed (truncated)
|
---|
| 665 | * archive if e.g. bunzip2 fails */
|
---|
| 666 | static int child_error;
|
---|
[821] | 667 |
|
---|
[1770] | 668 | static void handle_SIGCHLD(int status)
|
---|
| 669 | {
|
---|
| 670 | /* Actually, 'status' is a signo. We reuse it for other needs */
|
---|
[821] | 671 |
|
---|
[1770] | 672 | /* Wait for any child without blocking */
|
---|
| 673 | if (waitpid(-1, &status, WNOHANG) < 0)
|
---|
| 674 | /* wait failed?! I'm confused... */
|
---|
| 675 | return;
|
---|
[821] | 676 |
|
---|
[1770] | 677 | if (WIFEXITED(status) && WEXITSTATUS(status)==0)
|
---|
| 678 | /* child exited with 0 */
|
---|
| 679 | return;
|
---|
| 680 | /* Cannot happen?
|
---|
| 681 | if (!WIFSIGNALED(status) && !WIFEXITED(status)) return; */
|
---|
| 682 | child_error = 1;
|
---|
| 683 | }
|
---|
[821] | 684 | #endif
|
---|
| 685 |
|
---|
[1770] | 686 | enum {
|
---|
| 687 | OPTBIT_KEEP_OLD = 7,
|
---|
| 688 | USE_FEATURE_TAR_CREATE( OPTBIT_CREATE ,)
|
---|
| 689 | USE_FEATURE_TAR_CREATE( OPTBIT_DEREFERENCE ,)
|
---|
| 690 | USE_FEATURE_TAR_BZIP2( OPTBIT_BZIP2 ,)
|
---|
| 691 | USE_FEATURE_TAR_LZMA( OPTBIT_LZMA ,)
|
---|
| 692 | USE_FEATURE_TAR_FROM( OPTBIT_INCLUDE_FROM,)
|
---|
| 693 | USE_FEATURE_TAR_FROM( OPTBIT_EXCLUDE_FROM,)
|
---|
| 694 | USE_FEATURE_TAR_GZIP( OPTBIT_GZIP ,)
|
---|
| 695 | USE_FEATURE_TAR_COMPRESS(OPTBIT_COMPRESS ,)
|
---|
| 696 | OPTBIT_NOPRESERVE_OWN,
|
---|
| 697 | OPTBIT_NOPRESERVE_PERM,
|
---|
| 698 | OPT_TEST = 1 << 0, // t
|
---|
| 699 | OPT_EXTRACT = 1 << 1, // x
|
---|
| 700 | OPT_BASEDIR = 1 << 2, // C
|
---|
| 701 | OPT_TARNAME = 1 << 3, // f
|
---|
| 702 | OPT_2STDOUT = 1 << 4, // O
|
---|
| 703 | OPT_P = 1 << 5, // p
|
---|
| 704 | OPT_VERBOSE = 1 << 6, // v
|
---|
| 705 | OPT_KEEP_OLD = 1 << 7, // k
|
---|
| 706 | OPT_CREATE = USE_FEATURE_TAR_CREATE( (1<<OPTBIT_CREATE )) + 0, // c
|
---|
| 707 | OPT_DEREFERENCE = USE_FEATURE_TAR_CREATE( (1<<OPTBIT_DEREFERENCE )) + 0, // h
|
---|
| 708 | OPT_BZIP2 = USE_FEATURE_TAR_BZIP2( (1<<OPTBIT_BZIP2 )) + 0, // j
|
---|
| 709 | OPT_LZMA = USE_FEATURE_TAR_LZMA( (1<<OPTBIT_LZMA )) + 0, // a
|
---|
| 710 | OPT_INCLUDE_FROM = USE_FEATURE_TAR_FROM( (1<<OPTBIT_INCLUDE_FROM)) + 0, // T
|
---|
| 711 | OPT_EXCLUDE_FROM = USE_FEATURE_TAR_FROM( (1<<OPTBIT_EXCLUDE_FROM)) + 0, // X
|
---|
| 712 | OPT_GZIP = USE_FEATURE_TAR_GZIP( (1<<OPTBIT_GZIP )) + 0, // z
|
---|
| 713 | OPT_COMPRESS = USE_FEATURE_TAR_COMPRESS((1<<OPTBIT_COMPRESS )) + 0, // Z
|
---|
| 714 | OPT_NOPRESERVE_OWN = 1 << OPTBIT_NOPRESERVE_OWN , // no-same-owner
|
---|
| 715 | OPT_NOPRESERVE_PERM = 1 << OPTBIT_NOPRESERVE_PERM, // no-same-permissions
|
---|
| 716 | };
|
---|
| 717 | #if ENABLE_FEATURE_TAR_LONG_OPTIONS
|
---|
| 718 | static const char tar_longopts[] ALIGN1 =
|
---|
| 719 | "list\0" No_argument "t"
|
---|
| 720 | "extract\0" No_argument "x"
|
---|
| 721 | "directory\0" Required_argument "C"
|
---|
| 722 | "file\0" Required_argument "f"
|
---|
| 723 | "to-stdout\0" No_argument "O"
|
---|
| 724 | "same-permissions\0" No_argument "p"
|
---|
| 725 | "verbose\0" No_argument "v"
|
---|
| 726 | "keep-old\0" No_argument "k"
|
---|
| 727 | # if ENABLE_FEATURE_TAR_CREATE
|
---|
| 728 | "create\0" No_argument "c"
|
---|
| 729 | "dereference\0" No_argument "h"
|
---|
[821] | 730 | # endif
|
---|
[1770] | 731 | # if ENABLE_FEATURE_TAR_BZIP2
|
---|
| 732 | "bzip2\0" No_argument "j"
|
---|
[821] | 733 | # endif
|
---|
[1770] | 734 | # if ENABLE_FEATURE_TAR_LZMA
|
---|
| 735 | "lzma\0" No_argument "a"
|
---|
[821] | 736 | # endif
|
---|
[1770] | 737 | # if ENABLE_FEATURE_TAR_FROM
|
---|
| 738 | "files-from\0" Required_argument "T"
|
---|
| 739 | "exclude-from\0" Required_argument "X"
|
---|
[821] | 740 | # endif
|
---|
[1770] | 741 | # if ENABLE_FEATURE_TAR_GZIP
|
---|
| 742 | "gzip\0" No_argument "z"
|
---|
[821] | 743 | # endif
|
---|
[1770] | 744 | # if ENABLE_FEATURE_TAR_COMPRESS
|
---|
| 745 | "compress\0" No_argument "Z"
|
---|
[821] | 746 | # endif
|
---|
[1770] | 747 | "no-same-owner\0" No_argument "\xfd"
|
---|
| 748 | "no-same-permissions\0" No_argument "\xfe"
|
---|
| 749 | /* --exclude takes next bit position in option mask, */
|
---|
| 750 | /* therefore we have to either put it _after_ --no-same-perm */
|
---|
| 751 | /* or add OPT[BIT]_EXCLUDE before OPT[BIT]_NOPRESERVE_OWN */
|
---|
| 752 | # if ENABLE_FEATURE_TAR_FROM
|
---|
| 753 | "exclude\0" Required_argument "\xff"
|
---|
| 754 | # endif
|
---|
| 755 | ;
|
---|
[821] | 756 | #endif
|
---|
| 757 |
|
---|
[1770] | 758 | int tar_main(int argc, char **argv);
|
---|
[821] | 759 | int tar_main(int argc, char **argv)
|
---|
| 760 | {
|
---|
| 761 | char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
|
---|
| 762 | archive_handle_t *tar_handle;
|
---|
| 763 | char *base_dir = NULL;
|
---|
| 764 | const char *tar_filename = "-";
|
---|
[1770] | 765 | unsigned opt;
|
---|
| 766 | int verboseFlag = 0;
|
---|
| 767 | #if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
|
---|
[821] | 768 | llist_t *excludes = NULL;
|
---|
[1770] | 769 | #endif
|
---|
[821] | 770 |
|
---|
| 771 | /* Initialise default values */
|
---|
| 772 | tar_handle = init_handle();
|
---|
[1770] | 773 | tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS
|
---|
| 774 | | ARCHIVE_PRESERVE_DATE
|
---|
| 775 | | ARCHIVE_EXTRACT_UNCONDITIONAL;
|
---|
[821] | 776 |
|
---|
| 777 | /* Prepend '-' to the first argument if required */
|
---|
[1770] | 778 | opt_complementary = "--:" // first arg is options
|
---|
| 779 | "tt:vv:" // count -t,-v
|
---|
| 780 | "?:" // bail out with usage instead of error return
|
---|
| 781 | "X::T::" // cumulative lists
|
---|
| 782 | #if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
|
---|
| 783 | "\xff::" // cumulative lists for --exclude
|
---|
[821] | 784 | #endif
|
---|
[1770] | 785 | USE_FEATURE_TAR_CREATE("c:") "t:x:" // at least one of these is reqd
|
---|
| 786 | USE_FEATURE_TAR_CREATE("c--tx:t--cx:x--ct") // mutually exclusive
|
---|
| 787 | SKIP_FEATURE_TAR_CREATE("t--x:x--t"); // mutually exclusive
|
---|
| 788 | #if ENABLE_FEATURE_TAR_LONG_OPTIONS
|
---|
| 789 | applet_long_options = tar_longopts;
|
---|
| 790 | #endif
|
---|
| 791 | opt = getopt32(argv,
|
---|
| 792 | "txC:f:Opvk"
|
---|
| 793 | USE_FEATURE_TAR_CREATE( "ch" )
|
---|
| 794 | USE_FEATURE_TAR_BZIP2( "j" )
|
---|
| 795 | USE_FEATURE_TAR_LZMA( "a" )
|
---|
| 796 | USE_FEATURE_TAR_FROM( "T:X:")
|
---|
| 797 | USE_FEATURE_TAR_GZIP( "z" )
|
---|
| 798 | USE_FEATURE_TAR_COMPRESS("Z" )
|
---|
| 799 | , &base_dir // -C dir
|
---|
| 800 | , &tar_filename // -f filename
|
---|
| 801 | USE_FEATURE_TAR_FROM(, &(tar_handle->accept)) // T
|
---|
| 802 | USE_FEATURE_TAR_FROM(, &(tar_handle->reject)) // X
|
---|
| 803 | #if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
|
---|
| 804 | , &excludes // --exclude
|
---|
| 805 | #endif
|
---|
| 806 | , &verboseFlag // combined count for -t and -v
|
---|
| 807 | , &verboseFlag // combined count for -t and -v
|
---|
| 808 | );
|
---|
[821] | 809 |
|
---|
[1770] | 810 | if (verboseFlag) tar_handle->action_header = header_verbose_list;
|
---|
| 811 | if (verboseFlag == 1) tar_handle->action_header = header_list;
|
---|
| 812 |
|
---|
| 813 | if (opt & OPT_EXTRACT)
|
---|
[821] | 814 | tar_handle->action_data = data_extract_all;
|
---|
| 815 |
|
---|
[1770] | 816 | if (opt & OPT_2STDOUT)
|
---|
[821] | 817 | tar_handle->action_data = data_extract_to_stdout;
|
---|
| 818 |
|
---|
[1770] | 819 | if (opt & OPT_KEEP_OLD)
|
---|
[821] | 820 | tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL;
|
---|
| 821 |
|
---|
[1770] | 822 | if (opt & OPT_NOPRESERVE_OWN)
|
---|
[821] | 823 | tar_handle->flags |= ARCHIVE_NOPRESERVE_OWN;
|
---|
| 824 |
|
---|
[1770] | 825 | if (opt & OPT_NOPRESERVE_PERM)
|
---|
[821] | 826 | tar_handle->flags |= ARCHIVE_NOPRESERVE_PERM;
|
---|
| 827 |
|
---|
[1770] | 828 | if (opt & OPT_GZIP)
|
---|
[821] | 829 | get_header_ptr = get_header_tar_gz;
|
---|
| 830 |
|
---|
[1770] | 831 | if (opt & OPT_BZIP2)
|
---|
[821] | 832 | get_header_ptr = get_header_tar_bz2;
|
---|
| 833 |
|
---|
[1770] | 834 | if (opt & OPT_LZMA)
|
---|
[821] | 835 | get_header_ptr = get_header_tar_lzma;
|
---|
| 836 |
|
---|
[1770] | 837 | if (opt & OPT_COMPRESS)
|
---|
[821] | 838 | get_header_ptr = get_header_tar_Z;
|
---|
| 839 |
|
---|
[1770] | 840 | #if ENABLE_FEATURE_TAR_FROM
|
---|
| 841 | tar_handle->reject = append_file_list_to_list(tar_handle->reject);
|
---|
| 842 | #if ENABLE_FEATURE_TAR_LONG_OPTIONS
|
---|
| 843 | /* Append excludes to reject */
|
---|
| 844 | while (excludes) {
|
---|
| 845 | llist_t *next = excludes->link;
|
---|
| 846 | excludes->link = tar_handle->reject;
|
---|
| 847 | tar_handle->reject = excludes;
|
---|
| 848 | excludes = next;
|
---|
[821] | 849 | }
|
---|
[1770] | 850 | #endif
|
---|
| 851 | tar_handle->accept = append_file_list_to_list(tar_handle->accept);
|
---|
| 852 | #endif
|
---|
[821] | 853 |
|
---|
| 854 | /* Check if we are reading from stdin */
|
---|
| 855 | if (argv[optind] && *argv[optind] == '-') {
|
---|
| 856 | /* Default is to read from stdin, so just skip to next arg */
|
---|
| 857 | optind++;
|
---|
| 858 | }
|
---|
| 859 |
|
---|
| 860 | /* Setup an array of filenames to work with */
|
---|
| 861 | /* TODO: This is the same as in ar, separate function ? */
|
---|
| 862 | while (optind < argc) {
|
---|
[1770] | 863 | /* kill trailing '/' unless the string is just "/" */
|
---|
| 864 | char *cp = last_char_is(argv[optind], '/');
|
---|
| 865 | if (cp > argv[optind])
|
---|
| 866 | *cp = '\0';
|
---|
| 867 | llist_add_to_end(&tar_handle->accept, argv[optind]);
|
---|
[821] | 868 | optind++;
|
---|
| 869 | }
|
---|
| 870 |
|
---|
[1770] | 871 | if (tar_handle->accept || tar_handle->reject)
|
---|
[821] | 872 | tar_handle->filter = filter_accept_reject_list;
|
---|
| 873 |
|
---|
| 874 | /* Open the tar file */
|
---|
| 875 | {
|
---|
| 876 | FILE *tar_stream;
|
---|
| 877 | int flags;
|
---|
| 878 |
|
---|
[1770] | 879 | if (opt & OPT_CREATE) {
|
---|
[821] | 880 | /* Make sure there is at least one file to tar up. */
|
---|
| 881 | if (tar_handle->accept == NULL)
|
---|
| 882 | bb_error_msg_and_die("empty archive");
|
---|
| 883 |
|
---|
| 884 | tar_stream = stdout;
|
---|
[1770] | 885 | /* Mimicking GNU tar 1.15.1: */
|
---|
| 886 | flags = O_WRONLY|O_CREAT|O_TRUNC;
|
---|
| 887 | /* was doing unlink; open(O_WRONLY|O_CREAT|O_EXCL); why? */
|
---|
[821] | 888 | } else {
|
---|
| 889 | tar_stream = stdin;
|
---|
| 890 | flags = O_RDONLY;
|
---|
| 891 | }
|
---|
| 892 |
|
---|
[1770] | 893 | if (LONE_DASH(tar_filename)) {
|
---|
[821] | 894 | tar_handle->src_fd = fileno(tar_stream);
|
---|
[1770] | 895 | tar_handle->seek = seek_by_read;
|
---|
[821] | 896 | } else {
|
---|
[1770] | 897 | tar_handle->src_fd = xopen(tar_filename, flags);
|
---|
[821] | 898 | }
|
---|
| 899 | }
|
---|
| 900 |
|
---|
| 901 | if (base_dir)
|
---|
[1770] | 902 | xchdir(base_dir);
|
---|
[821] | 903 |
|
---|
[1770] | 904 | #ifdef CHECK_FOR_CHILD_EXITCODE
|
---|
| 905 | /* We need to know whether child (gzip/bzip/etc) exits abnormally */
|
---|
| 906 | signal(SIGCHLD, handle_SIGCHLD);
|
---|
| 907 | #endif
|
---|
| 908 |
|
---|
[821] | 909 | /* create an archive */
|
---|
[1770] | 910 | if (opt & OPT_CREATE) {
|
---|
[821] | 911 | int zipMode = 0;
|
---|
| 912 | if (ENABLE_FEATURE_TAR_GZIP && get_header_ptr == get_header_tar_gz)
|
---|
| 913 | zipMode = 1;
|
---|
| 914 | if (ENABLE_FEATURE_TAR_BZIP2 && get_header_ptr == get_header_tar_bz2)
|
---|
| 915 | zipMode = 2;
|
---|
[1770] | 916 | /* NB: writeTarFile() closes tar_handle->src_fd */
|
---|
| 917 | return writeTarFile(tar_handle->src_fd, verboseFlag, opt & OPT_DEREFERENCE,
|
---|
[821] | 918 | tar_handle->accept,
|
---|
[1770] | 919 | tar_handle->reject, zipMode);
|
---|
| 920 | }
|
---|
[821] | 921 |
|
---|
[1770] | 922 | while (get_header_ptr(tar_handle) == EXIT_SUCCESS)
|
---|
| 923 | /* nothing */;
|
---|
| 924 |
|
---|
| 925 | /* Check that every file that should have been extracted was */
|
---|
| 926 | while (tar_handle->accept) {
|
---|
| 927 | if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
|
---|
| 928 | && !find_list_entry(tar_handle->passed, tar_handle->accept->data)
|
---|
| 929 | ) {
|
---|
| 930 | bb_error_msg_and_die("%s: not found in archive",
|
---|
| 931 | tar_handle->accept->data);
|
---|
[821] | 932 | }
|
---|
[1770] | 933 | tar_handle->accept = tar_handle->accept->link;
|
---|
[821] | 934 | }
|
---|
[1770] | 935 | if (ENABLE_FEATURE_CLEAN_UP /* && tar_handle->src_fd != STDIN_FILENO */)
|
---|
[821] | 936 | close(tar_handle->src_fd);
|
---|
| 937 |
|
---|
[1770] | 938 | return EXIT_SUCCESS;
|
---|
[821] | 939 | }
|
---|