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893 lines
25 KiB
C
893 lines
25 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini tar implementation for busybox
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*
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* Modifed to use common extraction code used by ar, cpio, dpkg-deb, dpkg
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* Glenn McGrath <bug1@optushome.com.au>
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*
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* Note, that as of BusyBox-0.43, tar has been completely rewritten from the
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* ground up. It still has remnents of the old code lying about, but it is
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* very different now (i.e., cleaner, less global variables, etc.)
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Based in part in the tar implementation in sash
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* Copyright (c) 1999 by David I. Bell
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* Permission is granted to use, distribute, or modify this source,
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* provided that this copyright notice remains intact.
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* Permission to distribute sash derived code under the GPL has been granted.
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*
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* Based in part on the tar implementation from busybox-0.28
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* Copyright (C) 1995 Bruce Perens
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* This is free software under the GNU General Public License.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <fcntl.h>
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#include <getopt.h>
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#include <search.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fnmatch.h>
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#include <string.h>
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#include <errno.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include "unarchive.h"
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#include "busybox.h"
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#ifdef CONFIG_FEATURE_TAR_CREATE
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/* Tar file constants */
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# define TAR_MAGIC "ustar" /* ustar and a null */
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# define TAR_VERSION " " /* Be compatable with GNU tar format */
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# ifndef MAJOR
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# define MAJOR(dev) (((dev)>>8)&0xff)
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# define MINOR(dev) ((dev)&0xff)
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# endif
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static const int TAR_BLOCK_SIZE = 512;
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static const int TAR_MAGIC_LEN = 6;
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static const int TAR_VERSION_LEN = 2;
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/* POSIX tar Header Block, from POSIX 1003.1-1990 */
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enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
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struct TarHeader { /* byte offset */
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char name[NAME_SIZE]; /* 0-99 */
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char mode[8]; /* 100-107 */
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char uid[8]; /* 108-115 */
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char gid[8]; /* 116-123 */
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char size[12]; /* 124-135 */
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char mtime[12]; /* 136-147 */
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char chksum[8]; /* 148-155 */
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char typeflag; /* 156-156 */
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char linkname[NAME_SIZE]; /* 157-256 */
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char magic[6]; /* 257-262 */
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char version[2]; /* 263-264 */
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char uname[32]; /* 265-296 */
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char gname[32]; /* 297-328 */
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char devmajor[8]; /* 329-336 */
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char devminor[8]; /* 337-344 */
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char prefix[155]; /* 345-499 */
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char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
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};
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typedef struct TarHeader TarHeader;
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/*
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** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
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** the only functions that deal with the HardLinkInfo structure.
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** Even these functions use the xxxHardLinkInfo() functions.
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*/
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typedef struct HardLinkInfo HardLinkInfo;
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struct HardLinkInfo {
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HardLinkInfo *next; /* Next entry in list */
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dev_t dev; /* Device number */
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ino_t ino; /* Inode number */
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short linkCount; /* (Hard) Link Count */
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char name[1]; /* Start of filename (must be last) */
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};
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/* Some info to be carried along when creating a new tarball */
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struct TarBallInfo {
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char *fileName; /* File name of the tarball */
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int tarFd; /* Open-for-write file descriptor
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for the tarball */
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struct stat statBuf; /* Stat info for the tarball, letting
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us know the inode and device that the
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tarball lives, so we can avoid trying
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to include the tarball into itself */
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int verboseFlag; /* Whether to print extra stuff or not */
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const llist_t *excludeList; /* List of files to not include */
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HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
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HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
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};
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typedef struct TarBallInfo TarBallInfo;
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/* A nice enum with all the possible tar file content types */
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enum TarFileType {
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REGTYPE = '0', /* regular file */
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REGTYPE0 = '\0', /* regular file (ancient bug compat) */
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LNKTYPE = '1', /* hard link */
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SYMTYPE = '2', /* symbolic link */
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CHRTYPE = '3', /* character special */
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BLKTYPE = '4', /* block special */
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DIRTYPE = '5', /* directory */
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FIFOTYPE = '6', /* FIFO special */
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CONTTYPE = '7', /* reserved */
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GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
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GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
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};
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typedef enum TarFileType TarFileType;
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/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
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static inline void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
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struct stat *statbuf,
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const char *name)
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{
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/* Note: hlInfoHeadPtr can never be NULL! */
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HardLinkInfo *hlInfo;
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hlInfo = (HardLinkInfo *) xmalloc(sizeof(HardLinkInfo) + strlen(name));
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hlInfo->next = *hlInfoHeadPtr;
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*hlInfoHeadPtr = hlInfo;
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hlInfo->dev = statbuf->st_dev;
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hlInfo->ino = statbuf->st_ino;
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hlInfo->linkCount = statbuf->st_nlink;
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strcpy(hlInfo->name, name);
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}
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static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
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{
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HardLinkInfo *hlInfo = NULL;
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HardLinkInfo *hlInfoNext = NULL;
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if (hlInfoHeadPtr) {
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hlInfo = *hlInfoHeadPtr;
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while (hlInfo) {
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hlInfoNext = hlInfo->next;
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free(hlInfo);
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hlInfo = hlInfoNext;
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}
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*hlInfoHeadPtr = NULL;
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}
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return;
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}
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/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
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static inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
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{
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while (hlInfo) {
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if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
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break;
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hlInfo = hlInfo->next;
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}
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return (hlInfo);
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}
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/* Put an octal string into the specified buffer.
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* The number is zero and space padded and possibly null padded.
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* Returns TRUE if successful. */
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static int putOctal(char *cp, int len, long value)
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{
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int tempLength;
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char tempBuffer[32];
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char *tempString = tempBuffer;
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/* Create a string of the specified length with an initial space,
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* leading zeroes and the octal number, and a trailing null. */
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sprintf(tempString, "%0*lo", len - 1, value);
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/* If the string is too large, suppress the leading space. */
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tempLength = strlen(tempString) + 1;
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if (tempLength > len) {
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tempLength--;
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tempString++;
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}
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/* If the string is still too large, suppress the trailing null. */
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if (tempLength > len)
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tempLength--;
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/* If the string is still too large, fail. */
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if (tempLength > len)
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return FALSE;
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/* Copy the string to the field. */
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memcpy(cp, tempString, len);
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return TRUE;
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}
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/* Write out a tar header for the specified file/directory/whatever */
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static inline int writeTarHeader(struct TarBallInfo *tbInfo,
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const char *header_name,
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const char *real_name, struct stat *statbuf)
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{
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long chksum = 0;
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struct TarHeader header;
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const unsigned char *cp = (const unsigned char *) &header;
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ssize_t size = sizeof(struct TarHeader);
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memset(&header, 0, size);
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strncpy(header.name, header_name, sizeof(header.name));
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putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
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putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
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putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
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putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
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putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
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strncpy(header.magic, TAR_MAGIC TAR_VERSION,
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TAR_MAGIC_LEN + TAR_VERSION_LEN);
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/* Enter the user and group names (default to root if it fails) */
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if (my_getpwuid(header.uname, statbuf->st_uid) == NULL)
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strcpy(header.uname, "root");
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if (my_getgrgid(header.gname, statbuf->st_gid) == NULL)
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strcpy(header.gname, "root");
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if (tbInfo->hlInfo) {
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/* This is a hard link */
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header.typeflag = LNKTYPE;
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strncpy(header.linkname, tbInfo->hlInfo->name,
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sizeof(header.linkname));
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} else if (S_ISLNK(statbuf->st_mode)) {
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char *lpath = xreadlink(real_name);
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if (!lpath) /* Already printed err msg inside xreadlink() */
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return (FALSE);
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header.typeflag = SYMTYPE;
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strncpy(header.linkname, lpath, sizeof(header.linkname));
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free(lpath);
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} else if (S_ISDIR(statbuf->st_mode)) {
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header.typeflag = DIRTYPE;
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strncat(header.name, "/", sizeof(header.name));
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} else if (S_ISCHR(statbuf->st_mode)) {
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header.typeflag = CHRTYPE;
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putOctal(header.devmajor, sizeof(header.devmajor),
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MAJOR(statbuf->st_rdev));
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putOctal(header.devminor, sizeof(header.devminor),
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MINOR(statbuf->st_rdev));
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} else if (S_ISBLK(statbuf->st_mode)) {
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header.typeflag = BLKTYPE;
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putOctal(header.devmajor, sizeof(header.devmajor),
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MAJOR(statbuf->st_rdev));
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putOctal(header.devminor, sizeof(header.devminor),
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MINOR(statbuf->st_rdev));
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} else if (S_ISFIFO(statbuf->st_mode)) {
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header.typeflag = FIFOTYPE;
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} else if (S_ISREG(statbuf->st_mode)) {
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header.typeflag = REGTYPE;
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putOctal(header.size, sizeof(header.size), statbuf->st_size);
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} else {
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bb_error_msg("%s: Unknown file type", real_name);
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return (FALSE);
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}
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/* Calculate and store the checksum (i.e., the sum of all of the bytes of
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* the header). The checksum field must be filled with blanks for the
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* calculation. The checksum field is formatted differently from the
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* other fields: it has [6] digits, a null, then a space -- rather than
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* digits, followed by a null like the other fields... */
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memset(header.chksum, ' ', sizeof(header.chksum));
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cp = (const unsigned char *) &header;
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while (size-- > 0)
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chksum += *cp++;
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putOctal(header.chksum, 7, chksum);
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/* Now write the header out to disk */
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if ((size =
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bb_full_write(tbInfo->tarFd, (char *) &header,
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sizeof(struct TarHeader))) < 0) {
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bb_error_msg(bb_msg_io_error, real_name);
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return (FALSE);
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}
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/* Pad the header up to the tar block size */
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for (; size < TAR_BLOCK_SIZE; size++) {
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write(tbInfo->tarFd, "\0", 1);
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}
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/* Now do the verbose thing (or not) */
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if (tbInfo->verboseFlag) {
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FILE *vbFd = stdout;
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if (tbInfo->tarFd == STDOUT_FILENO) /* If the archive goes to stdout, verbose to stderr */
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vbFd = stderr;
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fprintf(vbFd, "%s\n", header.name);
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}
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return (TRUE);
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}
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# ifdef CONFIG_FEATURE_TAR_FROM
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static inline int exclude_file(const llist_t *excluded_files, const char *file)
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{
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while (excluded_files) {
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if (excluded_files->data[0] == '/') {
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if (fnmatch(excluded_files->data, file,
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FNM_PATHNAME | FNM_LEADING_DIR) == 0)
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return 1;
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} else {
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const char *p;
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for (p = file; p[0] != '\0'; p++) {
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if ((p == file || p[-1] == '/') && p[0] != '/' &&
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fnmatch(excluded_files->data, p,
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FNM_PATHNAME | FNM_LEADING_DIR) == 0)
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return 1;
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}
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}
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excluded_files = excluded_files->link;
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}
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return 0;
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}
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# endif
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static int writeFileToTarball(const char *fileName, struct stat *statbuf,
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void *userData)
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{
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struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
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const char *header_name;
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/*
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** Check to see if we are dealing with a hard link.
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** If so -
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** Treat the first occurance of a given dev/inode as a file while
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** treating any additional occurances as hard links. This is done
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** by adding the file information to the HardLinkInfo linked list.
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*/
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tbInfo->hlInfo = NULL;
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if (statbuf->st_nlink > 1) {
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tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
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if (tbInfo->hlInfo == NULL)
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addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
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}
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/* It is against the rules to archive a socket */
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if (S_ISSOCK(statbuf->st_mode)) {
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bb_error_msg("%s: socket ignored", fileName);
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return (TRUE);
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}
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/* It is a bad idea to store the archive we are in the process of creating,
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* so check the device and inode to be sure that this particular file isn't
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* the new tarball */
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if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
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tbInfo->statBuf.st_ino == statbuf->st_ino) {
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bb_error_msg("%s: file is the archive; skipping", fileName);
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return (TRUE);
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}
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header_name = fileName;
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while (header_name[0] == '/') {
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static int alreadyWarned = FALSE;
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if (alreadyWarned == FALSE) {
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bb_error_msg("Removing leading '/' from member names");
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alreadyWarned = TRUE;
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}
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header_name++;
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}
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if (strlen(fileName) >= NAME_SIZE) {
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bb_error_msg(bb_msg_name_longer_than_foo, NAME_SIZE);
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return (TRUE);
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}
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if (header_name[0] == '\0')
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return TRUE;
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# ifdef CONFIG_FEATURE_TAR_FROM
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if (exclude_file(tbInfo->excludeList, header_name)) {
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return SKIP;
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}
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# endif /* CONFIG_FEATURE_TAR_FROM */
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if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
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return (FALSE);
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}
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/* Now, if the file is a regular file, copy it out to the tarball */
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if ((tbInfo->hlInfo == NULL)
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&& (S_ISREG(statbuf->st_mode))) {
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int inputFileFd;
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ssize_t readSize = 0;
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/* open the file we want to archive, and make sure all is well */
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if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
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bb_perror_msg("%s: Cannot open", fileName);
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return (FALSE);
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}
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/* write the file to the archive */
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readSize = bb_copyfd_eof(inputFileFd, tbInfo->tarFd);
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/* Pad the file up to the tar block size */
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for (; (readSize % TAR_BLOCK_SIZE) != 0; readSize++) {
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write(tbInfo->tarFd, "\0", 1);
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}
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close(inputFileFd);
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}
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return (TRUE);
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}
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static inline int writeTarFile(const int tar_fd, const int verboseFlag,
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const unsigned long dereferenceFlag, const llist_t *include,
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const llist_t *exclude, const int gzip)
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{
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#ifdef CONFIG_FEATURE_TAR_GZIP
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int gzipDataPipe[2] = { -1, -1 };
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int gzipStatusPipe[2] = { -1, -1 };
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pid_t gzipPid = 0;
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volatile int vfork_exec_errno = 0;
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#endif
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int errorFlag = FALSE;
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ssize_t size;
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struct TarBallInfo tbInfo;
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tbInfo.hlInfoHead = NULL;
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fchmod(tar_fd, 0644);
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tbInfo.tarFd = tar_fd;
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tbInfo.verboseFlag = verboseFlag;
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/* Store the stat info for the tarball's file, so
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* can avoid including the tarball into itself.... */
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if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
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bb_perror_msg_and_die("Couldnt stat tar file");
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#ifdef CONFIG_FEATURE_TAR_GZIP
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if (gzip) {
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if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0) {
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bb_perror_msg_and_die("Failed to create gzip pipe");
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}
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signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
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# if __GNUC__
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/* Avoid vfork clobbering */
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(void) &include;
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(void) &errorFlag;
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# endif
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gzipPid = vfork();
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if (gzipPid == 0) {
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dup2(gzipDataPipe[0], 0);
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close(gzipDataPipe[1]);
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if (tbInfo.tarFd != 1);
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dup2(tbInfo.tarFd, 1);
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close(gzipStatusPipe[0]);
|
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fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows sucess */
|
|
|
|
execl("/bin/gzip", "gzip", "-f", 0);
|
|
vfork_exec_errno = errno;
|
|
|
|
close(gzipStatusPipe[1]);
|
|
exit(-1);
|
|
} else if (gzipPid > 0) {
|
|
close(gzipDataPipe[0]);
|
|
close(gzipStatusPipe[1]);
|
|
|
|
while (1) {
|
|
char buf;
|
|
|
|
int n = bb_full_read(gzipStatusPipe[0], &buf, 1);
|
|
|
|
if (n == 0 && vfork_exec_errno != 0) {
|
|
errno = vfork_exec_errno;
|
|
bb_perror_msg_and_die("Could not exec gzip process");
|
|
} else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
|
|
continue; /* try it again */
|
|
break;
|
|
}
|
|
close(gzipStatusPipe[0]);
|
|
|
|
tbInfo.tarFd = gzipDataPipe[1];
|
|
} else {
|
|
bb_perror_msg_and_die("Failed to vfork gzip process");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
tbInfo.excludeList = exclude;
|
|
|
|
/* Read the directory/files and iterate over them one at a time */
|
|
while (include) {
|
|
if (!recursive_action(include->data, TRUE, dereferenceFlag, FALSE,
|
|
writeFileToTarball, writeFileToTarball,
|
|
(void *) &tbInfo)) {
|
|
errorFlag = TRUE;
|
|
}
|
|
include = include->link;
|
|
}
|
|
/* Write two empty blocks to the end of the archive */
|
|
for (size = 0; size < (2 * TAR_BLOCK_SIZE); size++) {
|
|
write(tbInfo.tarFd, "\0", 1);
|
|
}
|
|
|
|
/* To be pedantically correct, we would check if the tarball
|
|
* is smaller than 20 tar blocks, and pad it if it was smaller,
|
|
* but that isn't necessary for GNU tar interoperability, and
|
|
* so is considered a waste of space */
|
|
|
|
/* Hang up the tools, close up shop, head home */
|
|
close(tbInfo.tarFd);
|
|
if (errorFlag)
|
|
bb_error_msg("Error exit delayed from previous errors");
|
|
|
|
freeHardLinkInfo(&tbInfo.hlInfoHead);
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_GZIP
|
|
if (gzip && gzipPid) {
|
|
if (waitpid(gzipPid, NULL, 0) == -1)
|
|
printf("Couldnt wait ?");
|
|
}
|
|
#endif
|
|
|
|
return !errorFlag;
|
|
}
|
|
#endif /* tar_create */
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_FROM
|
|
static llist_t *append_file_list_to_list(llist_t *list)
|
|
{
|
|
FILE *src_stream;
|
|
llist_t *cur = list;
|
|
llist_t *tmp;
|
|
char *line;
|
|
llist_t *newlist = NULL;
|
|
|
|
while(cur) {
|
|
src_stream = bb_xfopen(cur->data, "r");
|
|
tmp = cur;
|
|
cur = cur->link;
|
|
free(tmp);
|
|
while((line = bb_get_chomped_line_from_file(src_stream)) != NULL) {
|
|
newlist = llist_add_to(newlist, line);
|
|
}
|
|
fclose(src_stream);
|
|
}
|
|
return newlist;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_COMPRESS
|
|
static char get_header_tar_Z(archive_handle_t *archive_handle)
|
|
{
|
|
/* Cant lseek over pipe's */
|
|
archive_handle->seek = seek_by_char;
|
|
|
|
/* do the decompression, and cleanup */
|
|
if ((bb_xread_char(archive_handle->src_fd) != 0x1f) || (bb_xread_char(archive_handle->src_fd) != 0x9d)) {
|
|
bb_error_msg_and_die("Invalid magic");
|
|
}
|
|
|
|
archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress);
|
|
archive_handle->offset = 0;
|
|
while (get_header_tar(archive_handle) == EXIT_SUCCESS);
|
|
|
|
/* Can only do one file at a time */
|
|
return(EXIT_FAILURE);
|
|
}
|
|
#endif
|
|
|
|
#define CTX_TEST (1 << 0)
|
|
#define CTX_EXTRACT (1 << 1)
|
|
#define TAR_OPT_BASEDIR (1 << 2)
|
|
#define TAR_OPT_TARNAME (1 << 3)
|
|
#define TAR_OPT_2STDOUT (1 << 4)
|
|
#define TAR_OPT_P (1 << 5)
|
|
#define TAR_OPT_VERBOSE (1 << 6)
|
|
#define TAR_OPT_KEEP_OLD (1 << 7)
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_CREATE
|
|
# define CTX_CREATE (1 << 8)
|
|
# define TAR_OPT_DEREFERNCE (1 << 9)
|
|
# define TAR_OPT_STR_CREATE "ch"
|
|
# define TAR_OPT_FLAG_CREATE 2
|
|
#else
|
|
//# define CTX_CREATE 0
|
|
# define TAR_OPT_STR_CREATE ""
|
|
# define TAR_OPT_FLAG_CREATE 0
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_BZIP2
|
|
# define TAR_OPT_BZIP2 (1 << (8 + TAR_OPT_FLAG_CREATE))
|
|
# define TAR_OPT_STR_BZIP2 "j"
|
|
# define TAR_OPT_FLAG_BZIP2 1
|
|
#else
|
|
# define TAR_OPT_STR_BZIP2 ""
|
|
# define TAR_OPT_FLAG_BZIP2 0
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_FROM
|
|
# define TAR_OPT_FROM_FILE (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2))
|
|
# define TAR_OPT_EXCLUDE_FROM (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + 1))
|
|
# define TAR_OPT_STR_FROM "T:X:"
|
|
# define TAR_OPT_FLAG_FROM 2
|
|
#else
|
|
# define TAR_OPT_STR_FROM ""
|
|
# define TAR_OPT_FLAG_FROM 0
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_GZIP
|
|
# define TAR_OPT_GZIP (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + TAR_OPT_FLAG_FROM))
|
|
# define TAR_OPT_STR_GZIP "z"
|
|
# define TAR_OPT_FLAG_GZIP 1
|
|
#else
|
|
# define TAR_OPT_STR_GZIP ""
|
|
# define TAR_OPT_FLAG_GZIP 0
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_COMPRESS
|
|
# define TAR_OPT_UNCOMPRESS (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + TAR_OPT_FLAG_FROM + TAR_OPT_FLAG_GZIP))
|
|
# define TAR_OPT_STR_COMPRESS "Z"
|
|
#else
|
|
# define TAR_OPT_STR_COMPRESS ""
|
|
#endif
|
|
|
|
static const char tar_options[]="txC:f:Opvk" \
|
|
TAR_OPT_STR_CREATE \
|
|
TAR_OPT_STR_BZIP2 \
|
|
TAR_OPT_STR_FROM \
|
|
TAR_OPT_STR_GZIP \
|
|
TAR_OPT_STR_COMPRESS;
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS
|
|
static const struct option tar_long_options[] = {
|
|
{ "list", 0, NULL, 't' },
|
|
{ "extract", 0, NULL, 'x' },
|
|
{ "directory", 1, NULL, 'C' },
|
|
{ "file", 1, NULL, 'f' },
|
|
{ "to-stdout", 0, NULL, 'O' },
|
|
{ "same-permissions", 0, NULL, 'p' },
|
|
{ "verbose", 0, NULL, 'v' },
|
|
{ "keep-old", 0, NULL, 'k' },
|
|
# ifdef CONFIG_FEATURE_TAR_CREATE
|
|
{ "create", 0, NULL, 'c' },
|
|
{ "dereference", 0, NULL, 'h' },
|
|
# endif
|
|
# ifdef CONFIG_FEATURE_TAR_BZIP2
|
|
{ "bzip2", 0, NULL, 'j' },
|
|
# endif
|
|
# ifdef CONFIG_FEATURE_TAR_FROM
|
|
{ "from-file", 1, NULL, 'T' },
|
|
{ "exclude-from", 1, NULL, 'X' },
|
|
# endif
|
|
# ifdef CONFIG_FEATURE_TAR_GZIP
|
|
{ "gzip", 0, NULL, 'z' },
|
|
# endif
|
|
# ifdef CONFIG_FEATURE_TAR_COMPRESS
|
|
{ "compress", 0, NULL, 'Z' },
|
|
# endif
|
|
{ 0, 0, 0, 0 }
|
|
};
|
|
#endif
|
|
|
|
int tar_main(int argc, char **argv)
|
|
{
|
|
char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
|
|
archive_handle_t *tar_handle;
|
|
char *base_dir = NULL;
|
|
const char *tar_filename = "-";
|
|
unsigned long opt;
|
|
unsigned long ctx_flag = 0;
|
|
|
|
if (argc < 2) {
|
|
bb_show_usage();
|
|
}
|
|
|
|
/* Prepend '-' to the first argument if required */
|
|
if (argv[1][0] != '-') {
|
|
char *tmp;
|
|
|
|
bb_xasprintf(&tmp, "-%s", argv[1]);
|
|
argv[1] = tmp;
|
|
}
|
|
|
|
/* Initialise default values */
|
|
tar_handle = init_handle();
|
|
tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS | ARCHIVE_PRESERVE_DATE | ARCHIVE_EXTRACT_UNCONDITIONAL;
|
|
|
|
bb_opt_complementaly = "c~tx:t~cx:x~ct:X*:T*";
|
|
#ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS
|
|
bb_applet_long_options = tar_long_options;
|
|
#endif
|
|
|
|
opt = bb_getopt_ulflags(argc, argv, tar_options,
|
|
&base_dir, /* Change to dir <optarg> */
|
|
&tar_filename /* archive filename */
|
|
#ifdef CONFIG_FEATURE_TAR_FROM
|
|
, NULL,
|
|
&(tar_handle->reject)
|
|
#endif
|
|
);
|
|
|
|
/* Check one and only one context option was given */
|
|
if(opt & 0x80000000UL) {
|
|
bb_show_usage();
|
|
}
|
|
#ifdef CONFIG_FEATURE_TAR_CREATE
|
|
ctx_flag = opt & (CTX_CREATE | CTX_TEST | CTX_EXTRACT);
|
|
#else
|
|
ctx_flag = opt & (CTX_TEST | CTX_EXTRACT);
|
|
#endif
|
|
if (ctx_flag == 0) {
|
|
bb_show_usage();
|
|
}
|
|
if(ctx_flag & CTX_TEST) {
|
|
if ((tar_handle->action_header == header_list) ||
|
|
(tar_handle->action_header == header_verbose_list)) {
|
|
tar_handle->action_header = header_verbose_list;
|
|
} else {
|
|
tar_handle->action_header = header_list;
|
|
}
|
|
}
|
|
if(ctx_flag & CTX_EXTRACT) {
|
|
if (tar_handle->action_data != data_extract_to_stdout)
|
|
tar_handle->action_data = data_extract_all;
|
|
}
|
|
if(opt & TAR_OPT_2STDOUT) {
|
|
/* To stdout */
|
|
tar_handle->action_data = data_extract_to_stdout;
|
|
}
|
|
if(opt & TAR_OPT_VERBOSE) {
|
|
if ((tar_handle->action_header == header_list) ||
|
|
(tar_handle->action_header == header_verbose_list))
|
|
{
|
|
tar_handle->action_header = header_verbose_list;
|
|
} else {
|
|
tar_handle->action_header = header_list;
|
|
}
|
|
}
|
|
if (opt & TAR_OPT_KEEP_OLD) {
|
|
tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL;
|
|
}
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_GZIP
|
|
if(opt & TAR_OPT_GZIP) {
|
|
get_header_ptr = get_header_tar_gz;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_TAR_BZIP2
|
|
if(opt & TAR_OPT_BZIP2) {
|
|
get_header_ptr = get_header_tar_bz2;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_TAR_COMPRESS
|
|
if(opt & TAR_OPT_UNCOMPRESS) {
|
|
get_header_ptr = get_header_tar_Z;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_TAR_FROM
|
|
if(opt & TAR_OPT_EXCLUDE_FROM) {
|
|
tar_handle->reject = append_file_list_to_list(tar_handle->reject);
|
|
}
|
|
#endif
|
|
|
|
/* Check if we are reading from stdin */
|
|
if ((argv[optind]) && (*argv[optind] == '-')) {
|
|
/* Default is to read from stdin, so just skip to next arg */
|
|
optind++;
|
|
}
|
|
|
|
/* Setup an array of filenames to work with */
|
|
/* TODO: This is the same as in ar, seperate function ? */
|
|
while (optind < argc) {
|
|
char *filename_ptr = last_char_is(argv[optind], '/');
|
|
if (filename_ptr) {
|
|
*filename_ptr = '\0';
|
|
}
|
|
tar_handle->accept = llist_add_to(tar_handle->accept, argv[optind]);
|
|
optind++;
|
|
}
|
|
|
|
if ((tar_handle->accept) || (tar_handle->reject)) {
|
|
tar_handle->filter = filter_accept_reject_list;
|
|
}
|
|
|
|
/* Open the tar file */
|
|
{
|
|
FILE *tar_stream;
|
|
int flags;
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_CREATE
|
|
if (opt & CTX_CREATE) {
|
|
/* Make sure there is at least one file to tar up. */
|
|
if (tar_handle->accept == NULL) {
|
|
bb_error_msg_and_die("Cowardly refusing to create an empty archive");
|
|
}
|
|
tar_stream = stdout;
|
|
flags = O_WRONLY | O_CREAT | O_EXCL;
|
|
unlink(tar_filename);
|
|
} else
|
|
#endif
|
|
{
|
|
tar_stream = stdin;
|
|
flags = O_RDONLY;
|
|
}
|
|
|
|
if ((tar_filename[0] == '-') && (tar_filename[1] == '\0')) {
|
|
tar_handle->src_fd = fileno(tar_stream);
|
|
tar_handle->seek = seek_by_char;
|
|
} else {
|
|
tar_handle->src_fd = bb_xopen(tar_filename, flags);
|
|
}
|
|
}
|
|
|
|
if ((base_dir) && (chdir(base_dir))) {
|
|
bb_perror_msg_and_die("Couldnt chdir to %s", base_dir);
|
|
}
|
|
|
|
#ifdef CONFIG_FEATURE_TAR_CREATE
|
|
/* create an archive */
|
|
if (opt & CTX_CREATE) {
|
|
int verboseFlag = FALSE;
|
|
int gzipFlag = FALSE;
|
|
|
|
# ifdef CONFIG_FEATURE_TAR_GZIP
|
|
if (get_header_ptr == get_header_tar_gz) {
|
|
gzipFlag = TRUE;
|
|
}
|
|
# endif /* CONFIG_FEATURE_TAR_GZIP */
|
|
# ifdef CONFIG_FEATURE_TAR_BZIP2
|
|
if (get_header_ptr == get_header_tar_bz2) {
|
|
bb_error_msg_and_die("Creating bzip2 compressed archives is not currently supported.");
|
|
}
|
|
# endif /* CONFIG_FEATURE_TAR_BZIP2 */
|
|
|
|
if ((tar_handle->action_header == header_list) ||
|
|
(tar_handle->action_header == header_verbose_list)) {
|
|
verboseFlag = TRUE;
|
|
}
|
|
writeTarFile(tar_handle->src_fd, verboseFlag, opt & TAR_OPT_DEREFERNCE, tar_handle->accept,
|
|
tar_handle->reject, gzipFlag);
|
|
} else
|
|
#endif /* CONFIG_FEATURE_TAR_CREATE */
|
|
{
|
|
while (get_header_ptr(tar_handle) == EXIT_SUCCESS);
|
|
|
|
/* Ckeck that every file that should have been extracted was */
|
|
while (tar_handle->accept) {
|
|
if (find_list_entry(tar_handle->reject, tar_handle->accept->data) == NULL) {
|
|
if (find_list_entry(tar_handle->passed, tar_handle->accept->data) == NULL) {
|
|
bb_error_msg_and_die("%s: Not found in archive\n", tar_handle->accept->data);
|
|
}
|
|
}
|
|
tar_handle->accept = tar_handle->accept->link;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_FEATURE_CLEAN_UP
|
|
if (tar_handle->src_fd != STDIN_FILENO) {
|
|
close(tar_handle->src_fd);
|
|
}
|
|
#endif /* CONFIG_FEATURE_CLEAN_UP */
|
|
|
|
return(EXIT_SUCCESS);
|
|
}
|