1280 lines
41 KiB
C
1280 lines
41 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini tar implementation for busybox
|
|
*
|
|
* Modified to use common extraction code used by ar, cpio, dpkg-deb, dpkg
|
|
* by Glenn McGrath
|
|
*
|
|
* Note, that as of BusyBox-0.43, tar has been completely rewritten from the
|
|
* ground up. It still has remnants of the old code lying about, but it is
|
|
* very different now (i.e., cleaner, less global variables, etc.)
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Based in part in the tar implementation in sash
|
|
* Copyright (c) 1999 by David I. Bell
|
|
* Permission is granted to use, distribute, or modify this source,
|
|
* provided that this copyright notice remains intact.
|
|
* Permission to distribute sash derived code under GPL has been granted.
|
|
*
|
|
* Based in part on the tar implementation from busybox-0.28
|
|
* Copyright (C) 1995 Bruce Perens
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
|
*/
|
|
/* TODO: security with -C DESTDIR option can be enhanced.
|
|
* Consider tar file created via:
|
|
* $ tar cvf bug.tar anything.txt
|
|
* $ ln -s /tmp symlink
|
|
* $ tar --append -f bug.tar symlink
|
|
* $ rm symlink
|
|
* $ mkdir symlink
|
|
* $ tar --append -f bug.tar symlink/evil.py
|
|
*
|
|
* This will result in an archive which contains:
|
|
* $ tar --list -f bug.tar
|
|
* anything.txt
|
|
* symlink
|
|
* symlink/evil.py
|
|
*
|
|
* Untarring it puts evil.py in '/tmp' even if the -C DESTDIR is given.
|
|
* This doesn't feel right, and IIRC GNU tar doesn't do that.
|
|
*/
|
|
|
|
//config:config TAR
|
|
//config: bool "tar"
|
|
//config: default y
|
|
//config: help
|
|
//config: tar is an archiving program. It's commonly used with gzip to
|
|
//config: create compressed archives. It's probably the most widely used
|
|
//config: UNIX archive program.
|
|
//config:
|
|
//config:config FEATURE_TAR_CREATE
|
|
//config: bool "Enable archive creation"
|
|
//config: default y
|
|
//config: depends on TAR
|
|
//config: help
|
|
//config: If you enable this option you'll be able to create
|
|
//config: tar archives using the `-c' option.
|
|
//config:
|
|
//config:config FEATURE_TAR_AUTODETECT
|
|
//config: bool "Autodetect compressed tarballs"
|
|
//config: default y
|
|
//config: depends on TAR && (FEATURE_SEAMLESS_Z || FEATURE_SEAMLESS_GZ || FEATURE_SEAMLESS_BZ2 || FEATURE_SEAMLESS_LZMA || FEATURE_SEAMLESS_XZ)
|
|
//config: help
|
|
//config: With this option tar can automatically detect compressed
|
|
//config: tarballs. Currently it works only on files (not pipes etc).
|
|
//config:
|
|
//config:config FEATURE_TAR_FROM
|
|
//config: bool "Enable -X (exclude from) and -T (include from) options)"
|
|
//config: default y
|
|
//config: depends on TAR
|
|
//config: help
|
|
//config: If you enable this option you'll be able to specify
|
|
//config: a list of files to include or exclude from an archive.
|
|
//config:
|
|
//config:config FEATURE_TAR_OLDGNU_COMPATIBILITY
|
|
//config: bool "Support for old tar header format"
|
|
//config: default y
|
|
//config: depends on TAR || DPKG
|
|
//config: help
|
|
//config: This option is required to unpack archives created in
|
|
//config: the old GNU format; help to kill this old format by
|
|
//config: repacking your ancient archives with the new format.
|
|
//config:
|
|
//config:config FEATURE_TAR_OLDSUN_COMPATIBILITY
|
|
//config: bool "Enable untarring of tarballs with checksums produced by buggy Sun tar"
|
|
//config: default y
|
|
//config: depends on TAR || DPKG
|
|
//config: help
|
|
//config: This option is required to unpack archives created by some old
|
|
//config: version of Sun's tar (it was calculating checksum using signed
|
|
//config: arithmetic). It is said to be fixed in newer Sun tar, but "old"
|
|
//config: tarballs still exist.
|
|
//config:
|
|
//config:config FEATURE_TAR_GNU_EXTENSIONS
|
|
//config: bool "Support for GNU tar extensions (long filenames)"
|
|
//config: default y
|
|
//config: depends on TAR || DPKG
|
|
//config: help
|
|
//config: With this option busybox supports GNU long filenames and
|
|
//config: linknames.
|
|
//config:
|
|
//config:config FEATURE_TAR_LONG_OPTIONS
|
|
//config: bool "Enable long options"
|
|
//config: default y
|
|
//config: depends on TAR && LONG_OPTS
|
|
//config: help
|
|
//config: Enable use of long options, increases size by about 400 Bytes
|
|
//config:
|
|
//config:config FEATURE_TAR_TO_COMMAND
|
|
//config: bool "Support for writing to an external program"
|
|
//config: default y
|
|
//config: depends on TAR && FEATURE_TAR_LONG_OPTIONS
|
|
//config: help
|
|
//config: If you enable this option you'll be able to instruct tar to send
|
|
//config: the contents of each extracted file to the standard input of an
|
|
//config: external program.
|
|
//config:
|
|
//config:config FEATURE_TAR_UNAME_GNAME
|
|
//config: bool "Enable use of user and group names"
|
|
//config: default y
|
|
//config: depends on TAR
|
|
//config: help
|
|
//config: Enables use of user and group names in tar. This affects contents
|
|
//config: listings (-t) and preserving permissions when unpacking (-p).
|
|
//config: +200 bytes.
|
|
//config:
|
|
//config:config FEATURE_TAR_NOPRESERVE_TIME
|
|
//config: bool "Enable -m (do not preserve time) option"
|
|
//config: default y
|
|
//config: depends on TAR
|
|
//config: help
|
|
//config: With this option busybox supports GNU tar -m
|
|
//config: (do not preserve time) option.
|
|
//config:
|
|
//config:config FEATURE_TAR_SELINUX
|
|
//config: bool "Support for extracting SELinux labels"
|
|
//config: default n
|
|
//config: depends on TAR && SELINUX
|
|
//config: help
|
|
//config: With this option busybox supports restoring SELinux labels
|
|
//config: when extracting files from tar archives.
|
|
|
|
//applet:IF_TAR(APPLET(tar, BB_DIR_BIN, BB_SUID_DROP))
|
|
//kbuild:lib-$(CONFIG_TAR) += tar.o
|
|
|
|
#include <fnmatch.h>
|
|
#include "libbb.h"
|
|
#include "common_bufsiz.h"
|
|
#include "bb_archive.h"
|
|
/* FIXME: Stop using this non-standard feature */
|
|
#ifndef FNM_LEADING_DIR
|
|
# define FNM_LEADING_DIR 0
|
|
#endif
|
|
|
|
#if 0
|
|
# define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
|
|
#else
|
|
# define DBG(...) ((void)0)
|
|
#endif
|
|
#define DBG_OPTION_PARSING 0
|
|
|
|
|
|
#define block_buf bb_common_bufsiz1
|
|
#define INIT_G() do { setup_common_bufsiz(); } while (0)
|
|
|
|
|
|
#if ENABLE_FEATURE_TAR_CREATE
|
|
|
|
/*
|
|
** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
|
|
** the only functions that deal with the HardLinkInfo structure.
|
|
** Even these functions use the xxxHardLinkInfo() functions.
|
|
*/
|
|
typedef struct HardLinkInfo {
|
|
struct HardLinkInfo *next; /* Next entry in list */
|
|
dev_t dev; /* Device number */
|
|
ino_t ino; /* Inode number */
|
|
// short linkCount; /* (Hard) Link Count */
|
|
char name[1]; /* Start of filename (must be last) */
|
|
} HardLinkInfo;
|
|
|
|
/* Some info to be carried along when creating a new tarball */
|
|
typedef struct TarBallInfo {
|
|
int tarFd; /* Open-for-write file descriptor
|
|
* for the tarball */
|
|
int verboseFlag; /* Whether to print extra stuff or not */
|
|
const llist_t *excludeList; /* List of files to not include */
|
|
HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
|
|
HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
|
|
//TODO: save only st_dev + st_ino
|
|
struct stat tarFileStatBuf; /* Stat info for the tarball, letting
|
|
* us know the inode and device that the
|
|
* tarball lives, so we can avoid trying
|
|
* to include the tarball into itself */
|
|
} TarBallInfo;
|
|
|
|
/* A nice enum with all the possible tar file content types */
|
|
enum {
|
|
REGTYPE = '0', /* regular file */
|
|
REGTYPE0 = '\0', /* regular file (ancient bug compat) */
|
|
LNKTYPE = '1', /* hard link */
|
|
SYMTYPE = '2', /* symbolic link */
|
|
CHRTYPE = '3', /* character special */
|
|
BLKTYPE = '4', /* block special */
|
|
DIRTYPE = '5', /* directory */
|
|
FIFOTYPE = '6', /* FIFO special */
|
|
CONTTYPE = '7', /* reserved */
|
|
GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
|
|
GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
|
|
};
|
|
|
|
/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
|
|
static void addHardLinkInfo(HardLinkInfo **hlInfoHeadPtr,
|
|
struct stat *statbuf,
|
|
const char *fileName)
|
|
{
|
|
/* Note: hlInfoHeadPtr can never be NULL! */
|
|
HardLinkInfo *hlInfo;
|
|
|
|
hlInfo = xmalloc(sizeof(HardLinkInfo) + strlen(fileName));
|
|
hlInfo->next = *hlInfoHeadPtr;
|
|
*hlInfoHeadPtr = hlInfo;
|
|
hlInfo->dev = statbuf->st_dev;
|
|
hlInfo->ino = statbuf->st_ino;
|
|
// hlInfo->linkCount = statbuf->st_nlink;
|
|
strcpy(hlInfo->name, fileName);
|
|
}
|
|
|
|
static void freeHardLinkInfo(HardLinkInfo **hlInfoHeadPtr)
|
|
{
|
|
HardLinkInfo *hlInfo;
|
|
HardLinkInfo *hlInfoNext;
|
|
|
|
if (hlInfoHeadPtr) {
|
|
hlInfo = *hlInfoHeadPtr;
|
|
while (hlInfo) {
|
|
hlInfoNext = hlInfo->next;
|
|
free(hlInfo);
|
|
hlInfo = hlInfoNext;
|
|
}
|
|
*hlInfoHeadPtr = NULL;
|
|
}
|
|
}
|
|
|
|
/* Might be faster (and bigger) if the dev/ino were stored in numeric order ;) */
|
|
static HardLinkInfo *findHardLinkInfo(HardLinkInfo *hlInfo, struct stat *statbuf)
|
|
{
|
|
while (hlInfo) {
|
|
if (statbuf->st_ino == hlInfo->ino
|
|
&& statbuf->st_dev == hlInfo->dev
|
|
) {
|
|
DBG("found hardlink:'%s'", hlInfo->name);
|
|
break;
|
|
}
|
|
hlInfo = hlInfo->next;
|
|
}
|
|
return hlInfo;
|
|
}
|
|
|
|
/* Put an octal string into the specified buffer.
|
|
* The number is zero padded and possibly null terminated.
|
|
* Stores low-order bits only if whole value does not fit. */
|
|
static void putOctal(char *cp, int len, off_t value)
|
|
{
|
|
char tempBuffer[sizeof(off_t)*3 + 1];
|
|
char *tempString = tempBuffer;
|
|
int width;
|
|
|
|
width = sprintf(tempBuffer, "%0*"OFF_FMT"o", len, value);
|
|
tempString += (width - len);
|
|
|
|
/* If string has leading zeroes, we can drop one */
|
|
/* and field will have trailing '\0' */
|
|
/* (increases chances of compat with other tars) */
|
|
if (tempString[0] == '0')
|
|
tempString++;
|
|
|
|
/* Copy the string to the field */
|
|
memcpy(cp, tempString, len);
|
|
}
|
|
#define PUT_OCTAL(a, b) putOctal((a), sizeof(a), (b))
|
|
|
|
static void chksum_and_xwrite(int fd, struct tar_header_t* hp)
|
|
{
|
|
/* POSIX says that checksum is done on unsigned bytes
|
|
* (Sun and HP-UX gets it wrong... more details in
|
|
* GNU tar source) */
|
|
const unsigned char *cp;
|
|
int chksum, size;
|
|
|
|
strcpy(hp->magic, "ustar ");
|
|
|
|
/* Calculate and store the checksum (i.e., the sum of all of the bytes of
|
|
* the header). The checksum field must be filled with blanks for the
|
|
* calculation. The checksum field is formatted differently from the
|
|
* other fields: it has 6 digits, a null, then a space -- rather than
|
|
* digits, followed by a null like the other fields... */
|
|
memset(hp->chksum, ' ', sizeof(hp->chksum));
|
|
cp = (const unsigned char *) hp;
|
|
chksum = 0;
|
|
size = sizeof(*hp);
|
|
do { chksum += *cp++; } while (--size);
|
|
putOctal(hp->chksum, sizeof(hp->chksum)-1, chksum);
|
|
|
|
/* Now write the header out to disk */
|
|
xwrite(fd, hp, sizeof(*hp));
|
|
}
|
|
|
|
#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
|
|
static void writeLongname(int fd, int type, const char *name, int dir)
|
|
{
|
|
static const struct {
|
|
char mode[8]; /* 100-107 */
|
|
char uid[8]; /* 108-115 */
|
|
char gid[8]; /* 116-123 */
|
|
char size[12]; /* 124-135 */
|
|
char mtime[12]; /* 136-147 */
|
|
} prefilled = {
|
|
"0000000",
|
|
"0000000",
|
|
"0000000",
|
|
"00000000000",
|
|
"00000000000",
|
|
};
|
|
struct tar_header_t header;
|
|
int size;
|
|
|
|
dir = !!dir; /* normalize: 0/1 */
|
|
size = strlen(name) + 1 + dir; /* GNU tar uses strlen+1 */
|
|
/* + dir: account for possible '/' */
|
|
|
|
memset(&header, 0, sizeof(header));
|
|
strcpy(header.name, "././@LongLink");
|
|
memcpy(header.mode, prefilled.mode, sizeof(prefilled));
|
|
PUT_OCTAL(header.size, size);
|
|
header.typeflag = type;
|
|
chksum_and_xwrite(fd, &header);
|
|
|
|
/* Write filename[/] and pad the block. */
|
|
/* dir=0: writes 'name<NUL>', pads */
|
|
/* dir=1: writes 'name', writes '/<NUL>', pads */
|
|
dir *= 2;
|
|
xwrite(fd, name, size - dir);
|
|
xwrite(fd, "/", dir);
|
|
size = (-size) & (TAR_BLOCK_SIZE-1);
|
|
memset(&header, 0, size);
|
|
xwrite(fd, &header, size);
|
|
}
|
|
#endif
|
|
|
|
/* Write out a tar header for the specified file/directory/whatever */
|
|
static int writeTarHeader(struct TarBallInfo *tbInfo,
|
|
const char *header_name, const char *fileName, struct stat *statbuf)
|
|
{
|
|
struct tar_header_t header;
|
|
|
|
memset(&header, 0, sizeof(header));
|
|
|
|
strncpy(header.name, header_name, sizeof(header.name));
|
|
|
|
/* POSIX says to mask mode with 07777. */
|
|
PUT_OCTAL(header.mode, statbuf->st_mode & 07777);
|
|
PUT_OCTAL(header.uid, statbuf->st_uid);
|
|
PUT_OCTAL(header.gid, statbuf->st_gid);
|
|
memset(header.size, '0', sizeof(header.size)-1); /* Regular file size is handled later */
|
|
/* users report that files with negative st_mtime cause trouble, so: */
|
|
PUT_OCTAL(header.mtime, statbuf->st_mtime >= 0 ? statbuf->st_mtime : 0);
|
|
|
|
/* Enter the user and group names */
|
|
safe_strncpy(header.uname, get_cached_username(statbuf->st_uid), sizeof(header.uname));
|
|
safe_strncpy(header.gname, get_cached_groupname(statbuf->st_gid), sizeof(header.gname));
|
|
|
|
if (tbInfo->hlInfo) {
|
|
/* This is a hard link */
|
|
header.typeflag = LNKTYPE;
|
|
strncpy(header.linkname, tbInfo->hlInfo->name,
|
|
sizeof(header.linkname));
|
|
#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
|
|
/* Write out long linkname if needed */
|
|
if (header.linkname[sizeof(header.linkname)-1])
|
|
writeLongname(tbInfo->tarFd, GNULONGLINK,
|
|
tbInfo->hlInfo->name, 0);
|
|
#endif
|
|
} else if (S_ISLNK(statbuf->st_mode)) {
|
|
char *lpath = xmalloc_readlink_or_warn(fileName);
|
|
if (!lpath)
|
|
return FALSE;
|
|
header.typeflag = SYMTYPE;
|
|
strncpy(header.linkname, lpath, sizeof(header.linkname));
|
|
#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
|
|
/* Write out long linkname if needed */
|
|
if (header.linkname[sizeof(header.linkname)-1])
|
|
writeLongname(tbInfo->tarFd, GNULONGLINK, lpath, 0);
|
|
#else
|
|
/* If it is larger than 100 bytes, bail out */
|
|
if (header.linkname[sizeof(header.linkname)-1]) {
|
|
free(lpath);
|
|
bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
|
|
return FALSE;
|
|
}
|
|
#endif
|
|
free(lpath);
|
|
} else if (S_ISDIR(statbuf->st_mode)) {
|
|
header.typeflag = DIRTYPE;
|
|
/* Append '/' only if there is a space for it */
|
|
if (!header.name[sizeof(header.name)-1])
|
|
header.name[strlen(header.name)] = '/';
|
|
} else if (S_ISCHR(statbuf->st_mode)) {
|
|
header.typeflag = CHRTYPE;
|
|
PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
|
|
PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
|
|
} else if (S_ISBLK(statbuf->st_mode)) {
|
|
header.typeflag = BLKTYPE;
|
|
PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
|
|
PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
|
|
} else if (S_ISFIFO(statbuf->st_mode)) {
|
|
header.typeflag = FIFOTYPE;
|
|
} else if (S_ISREG(statbuf->st_mode)) {
|
|
/* header.size field is 12 bytes long */
|
|
/* Does octal-encoded size fit? */
|
|
uoff_t filesize = statbuf->st_size;
|
|
if (sizeof(filesize) <= 4
|
|
|| filesize <= (uoff_t)0777777777777LL
|
|
) {
|
|
PUT_OCTAL(header.size, filesize);
|
|
}
|
|
/* Does base256-encoded size fit?
|
|
* It always does unless off_t is wider than 64 bits.
|
|
*/
|
|
else if (ENABLE_FEATURE_TAR_GNU_EXTENSIONS
|
|
#if ULLONG_MAX > 0xffffffffffffffffLL /* 2^64-1 */
|
|
&& (filesize <= 0x3fffffffffffffffffffffffLL)
|
|
#endif
|
|
) {
|
|
/* GNU tar uses "base-256 encoding" for very large numbers.
|
|
* Encoding is binary, with highest bit always set as a marker
|
|
* and sign in next-highest bit:
|
|
* 80 00 .. 00 - zero
|
|
* bf ff .. ff - largest positive number
|
|
* ff ff .. ff - minus 1
|
|
* c0 00 .. 00 - smallest negative number
|
|
*/
|
|
char *p8 = header.size + sizeof(header.size);
|
|
do {
|
|
*--p8 = (uint8_t)filesize;
|
|
filesize >>= 8;
|
|
} while (p8 != header.size);
|
|
*p8 |= 0x80;
|
|
} else {
|
|
bb_error_msg_and_die("can't store file '%s' "
|
|
"of size %"OFF_FMT"u, aborting",
|
|
fileName, statbuf->st_size);
|
|
}
|
|
header.typeflag = REGTYPE;
|
|
} else {
|
|
bb_error_msg("%s: unknown file type", fileName);
|
|
return FALSE;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
|
|
/* Write out long name if needed */
|
|
/* (we, like GNU tar, output long linkname *before* long name) */
|
|
if (header.name[sizeof(header.name)-1])
|
|
writeLongname(tbInfo->tarFd, GNULONGNAME,
|
|
header_name, S_ISDIR(statbuf->st_mode));
|
|
#endif
|
|
|
|
/* Now write the header out to disk */
|
|
chksum_and_xwrite(tbInfo->tarFd, &header);
|
|
|
|
/* Now do the verbose thing (or not) */
|
|
if (tbInfo->verboseFlag) {
|
|
FILE *vbFd = stdout;
|
|
|
|
/* If archive goes to stdout, verbose goes to stderr */
|
|
if (tbInfo->tarFd == STDOUT_FILENO)
|
|
vbFd = stderr;
|
|
/* GNU "tar cvvf" prints "extended" listing a-la "ls -l" */
|
|
/* We don't have such excesses here: for us "v" == "vv" */
|
|
/* '/' is probably a GNUism */
|
|
fprintf(vbFd, "%s%s\n", header_name,
|
|
S_ISDIR(statbuf->st_mode) ? "/" : "");
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_TAR_FROM
|
|
static int exclude_file(const llist_t *excluded_files, const char *file)
|
|
{
|
|
while (excluded_files) {
|
|
if (excluded_files->data[0] == '/') {
|
|
if (fnmatch(excluded_files->data, file,
|
|
FNM_PATHNAME | FNM_LEADING_DIR) == 0)
|
|
return 1;
|
|
} else {
|
|
const char *p;
|
|
|
|
for (p = file; p[0] != '\0'; p++) {
|
|
if ((p == file || p[-1] == '/')
|
|
&& p[0] != '/'
|
|
&& fnmatch(excluded_files->data, p,
|
|
FNM_PATHNAME | FNM_LEADING_DIR) == 0
|
|
) {
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
excluded_files = excluded_files->link;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
# define exclude_file(excluded_files, file) 0
|
|
#endif
|
|
|
|
static int FAST_FUNC writeFileToTarball(const char *fileName, struct stat *statbuf,
|
|
void *userData, int depth UNUSED_PARAM)
|
|
{
|
|
struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
|
|
const char *header_name;
|
|
int inputFileFd = -1;
|
|
|
|
DBG("writeFileToTarball('%s')", fileName);
|
|
|
|
/* Strip leading '/' and such (must be before memorizing hardlink's name) */
|
|
header_name = strip_unsafe_prefix(fileName);
|
|
|
|
if (header_name[0] == '\0')
|
|
return TRUE;
|
|
|
|
/* It is against the rules to archive a socket */
|
|
if (S_ISSOCK(statbuf->st_mode)) {
|
|
bb_error_msg("%s: socket ignored", fileName);
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Check to see if we are dealing with a hard link.
|
|
* If so -
|
|
* Treat the first occurance of a given dev/inode as a file while
|
|
* treating any additional occurances as hard links. This is done
|
|
* by adding the file information to the HardLinkInfo linked list.
|
|
*/
|
|
tbInfo->hlInfo = NULL;
|
|
if (!S_ISDIR(statbuf->st_mode) && statbuf->st_nlink > 1) {
|
|
DBG("'%s': st_nlink > 1", header_name);
|
|
tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
|
|
if (tbInfo->hlInfo == NULL) {
|
|
DBG("'%s': addHardLinkInfo", header_name);
|
|
addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, header_name);
|
|
}
|
|
}
|
|
|
|
/* It is a bad idea to store the archive we are in the process of creating,
|
|
* so check the device and inode to be sure that this particular file isn't
|
|
* the new tarball */
|
|
if (tbInfo->tarFileStatBuf.st_dev == statbuf->st_dev
|
|
&& tbInfo->tarFileStatBuf.st_ino == statbuf->st_ino
|
|
) {
|
|
bb_error_msg("%s: file is the archive; skipping", fileName);
|
|
return TRUE;
|
|
}
|
|
|
|
if (exclude_file(tbInfo->excludeList, header_name))
|
|
return SKIP;
|
|
|
|
#if !ENABLE_FEATURE_TAR_GNU_EXTENSIONS
|
|
if (strlen(header_name) >= NAME_SIZE) {
|
|
bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
|
|
return TRUE;
|
|
}
|
|
#endif
|
|
|
|
/* Is this a regular file? */
|
|
if (tbInfo->hlInfo == NULL && S_ISREG(statbuf->st_mode)) {
|
|
/* open the file we want to archive, and make sure all is well */
|
|
inputFileFd = open_or_warn(fileName, O_RDONLY);
|
|
if (inputFileFd < 0) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* Add an entry to the tarball */
|
|
if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* If it was a regular file, write out the body */
|
|
if (inputFileFd >= 0) {
|
|
size_t readSize;
|
|
/* Write the file to the archive. */
|
|
/* We record size into header first, */
|
|
/* and then write out file. If file shrinks in between, */
|
|
/* tar will be corrupted. So we don't allow for that. */
|
|
/* NB: GNU tar 1.16 warns and pads with zeroes */
|
|
/* or even seeks back and updates header */
|
|
bb_copyfd_exact_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
|
|
////off_t readSize;
|
|
////readSize = bb_copyfd_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
|
|
////if (readSize != statbuf->st_size && readSize >= 0) {
|
|
//// bb_error_msg_and_die("short read from %s, aborting", fileName);
|
|
////}
|
|
|
|
/* Check that file did not grow in between? */
|
|
/* if (safe_read(inputFileFd, 1) == 1) warn but continue? */
|
|
|
|
close(inputFileFd);
|
|
|
|
/* Pad the file up to the tar block size */
|
|
/* (a few tricks here in the name of code size) */
|
|
readSize = (-(int)statbuf->st_size) & (TAR_BLOCK_SIZE-1);
|
|
memset(block_buf, 0, readSize);
|
|
xwrite(tbInfo->tarFd, block_buf, readSize);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#if SEAMLESS_COMPRESSION
|
|
/* Don't inline: vfork scares gcc and pessimizes code */
|
|
static void NOINLINE vfork_compressor(int tar_fd, const char *gzip)
|
|
{
|
|
pid_t gzipPid;
|
|
|
|
// On Linux, vfork never unpauses parent early, although standard
|
|
// allows for that. Do we want to waste bytes checking for it?
|
|
# define WAIT_FOR_CHILD 0
|
|
volatile int vfork_exec_errno = 0;
|
|
struct fd_pair gzipDataPipe;
|
|
# if WAIT_FOR_CHILD
|
|
struct fd_pair gzipStatusPipe;
|
|
xpiped_pair(gzipStatusPipe);
|
|
# endif
|
|
xpiped_pair(gzipDataPipe);
|
|
|
|
signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
|
|
|
|
gzipPid = xvfork();
|
|
|
|
if (gzipPid == 0) {
|
|
/* child */
|
|
/* NB: close _first_, then move fds! */
|
|
close(gzipDataPipe.wr);
|
|
# if WAIT_FOR_CHILD
|
|
close(gzipStatusPipe.rd);
|
|
/* gzipStatusPipe.wr will close only on exec -
|
|
* parent waits for this close to happen */
|
|
fcntl(gzipStatusPipe.wr, F_SETFD, FD_CLOEXEC);
|
|
# endif
|
|
xmove_fd(gzipDataPipe.rd, 0);
|
|
xmove_fd(tar_fd, 1);
|
|
/* exec gzip/bzip2 program/applet */
|
|
BB_EXECLP(gzip, gzip, "-f", (char *)0);
|
|
vfork_exec_errno = errno;
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
|
|
/* parent */
|
|
xmove_fd(gzipDataPipe.wr, tar_fd);
|
|
close(gzipDataPipe.rd);
|
|
# if WAIT_FOR_CHILD
|
|
close(gzipStatusPipe.wr);
|
|
while (1) {
|
|
char buf;
|
|
int n;
|
|
|
|
/* Wait until child execs (or fails to) */
|
|
n = full_read(gzipStatusPipe.rd, &buf, 1);
|
|
if (n < 0 /* && errno == EAGAIN */)
|
|
continue; /* try it again */
|
|
}
|
|
close(gzipStatusPipe.rd);
|
|
# endif
|
|
if (vfork_exec_errno) {
|
|
errno = vfork_exec_errno;
|
|
bb_perror_msg_and_die("can't execute '%s'", gzip);
|
|
}
|
|
}
|
|
#endif /* SEAMLESS_COMPRESSION */
|
|
|
|
|
|
#if !SEAMLESS_COMPRESSION
|
|
/* Do not pass gzip flag to writeTarFile() */
|
|
#define writeTarFile(tar_fd, verboseFlag, recurseFlags, include, exclude, gzip) \
|
|
writeTarFile(tar_fd, verboseFlag, recurseFlags, include, exclude)
|
|
#endif
|
|
/* gcc 4.2.1 inlines it, making code bigger */
|
|
static NOINLINE int writeTarFile(int tar_fd, int verboseFlag,
|
|
int recurseFlags, const llist_t *include,
|
|
const llist_t *exclude, const char *gzip)
|
|
{
|
|
int errorFlag = FALSE;
|
|
struct TarBallInfo tbInfo;
|
|
|
|
tbInfo.hlInfoHead = NULL;
|
|
tbInfo.tarFd = tar_fd;
|
|
tbInfo.verboseFlag = verboseFlag;
|
|
|
|
/* Store the stat info for the tarball's file, so
|
|
* can avoid including the tarball into itself.... */
|
|
xfstat(tbInfo.tarFd, &tbInfo.tarFileStatBuf, "can't stat tar file");
|
|
|
|
#if SEAMLESS_COMPRESSION
|
|
if (gzip)
|
|
vfork_compressor(tbInfo.tarFd, gzip);
|
|
#endif
|
|
|
|
tbInfo.excludeList = exclude;
|
|
|
|
/* Read the directory/files and iterate over them one at a time */
|
|
while (include) {
|
|
if (!recursive_action(include->data, recurseFlags,
|
|
writeFileToTarball, writeFileToTarball, &tbInfo, 0)
|
|
) {
|
|
errorFlag = TRUE;
|
|
}
|
|
include = include->link;
|
|
}
|
|
/* Write two empty blocks to the end of the archive */
|
|
memset(block_buf, 0, 2*TAR_BLOCK_SIZE);
|
|
xwrite(tbInfo.tarFd, block_buf, 2*TAR_BLOCK_SIZE);
|
|
|
|
/* 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 */
|
|
|
|
/* Close so the child process (if any) will exit */
|
|
close(tbInfo.tarFd);
|
|
|
|
/* Hang up the tools, close up shop, head home */
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
freeHardLinkInfo(&tbInfo.hlInfoHead);
|
|
|
|
if (errorFlag)
|
|
bb_error_msg("error exit delayed from previous errors");
|
|
|
|
#if SEAMLESS_COMPRESSION
|
|
if (gzip) {
|
|
int status;
|
|
if (safe_waitpid(-1, &status, 0) == -1)
|
|
bb_perror_msg("waitpid");
|
|
else if (!WIFEXITED(status) || WEXITSTATUS(status))
|
|
/* gzip was killed or has exited with nonzero! */
|
|
errorFlag = TRUE;
|
|
}
|
|
#endif
|
|
return errorFlag;
|
|
}
|
|
#else /* !FEATURE_TAR_CREATE */
|
|
# define writeTarFile(...) 0
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_TAR_FROM
|
|
static llist_t *append_file_list_to_list(llist_t *list)
|
|
{
|
|
FILE *src_stream;
|
|
char *line;
|
|
llist_t *newlist = NULL;
|
|
|
|
while (list) {
|
|
src_stream = xfopen_stdin(llist_pop(&list));
|
|
while ((line = xmalloc_fgetline(src_stream)) != NULL) {
|
|
/* kill trailing '/' unless the string is just "/" */
|
|
char *cp = last_char_is(line, '/');
|
|
if (cp > line)
|
|
*cp = '\0';
|
|
llist_add_to_end(&newlist, line);
|
|
}
|
|
fclose(src_stream);
|
|
}
|
|
return newlist;
|
|
}
|
|
#endif
|
|
|
|
//usage:#define tar_trivial_usage
|
|
//usage: "-[" IF_FEATURE_TAR_CREATE("c") "xt"
|
|
//usage: IF_FEATURE_SEAMLESS_Z("Z")
|
|
//usage: IF_FEATURE_SEAMLESS_GZ("z")
|
|
//usage: IF_FEATURE_SEAMLESS_XZ("J")
|
|
//usage: IF_FEATURE_SEAMLESS_BZ2("j")
|
|
//usage: IF_FEATURE_SEAMLESS_LZMA("a")
|
|
//usage: IF_FEATURE_TAR_CREATE("h")
|
|
//usage: IF_FEATURE_TAR_NOPRESERVE_TIME("m")
|
|
//usage: "vO] "
|
|
//usage: IF_FEATURE_TAR_FROM("[-X FILE] [-T FILE] ")
|
|
//usage: "[-f TARFILE] [-C DIR] [FILE]..."
|
|
//usage:#define tar_full_usage "\n\n"
|
|
//usage: IF_FEATURE_TAR_CREATE("Create, extract, ")
|
|
//usage: IF_NOT_FEATURE_TAR_CREATE("Extract ")
|
|
//usage: "or list files from a tar file\n"
|
|
//usage: "\nOperation:"
|
|
//usage: IF_FEATURE_TAR_CREATE(
|
|
//usage: "\n c Create"
|
|
//usage: )
|
|
//usage: "\n x Extract"
|
|
//usage: "\n t List"
|
|
//usage: "\n f Name of TARFILE ('-' for stdin/out)"
|
|
//usage: "\n C Change to DIR before operation"
|
|
//usage: "\n v Verbose"
|
|
//usage: IF_FEATURE_SEAMLESS_Z(
|
|
//usage: "\n Z (De)compress using compress"
|
|
//usage: )
|
|
//usage: IF_FEATURE_SEAMLESS_GZ(
|
|
//usage: "\n z (De)compress using gzip"
|
|
//usage: )
|
|
//usage: IF_FEATURE_SEAMLESS_XZ(
|
|
//usage: "\n J (De)compress using xz"
|
|
//usage: )
|
|
//usage: IF_FEATURE_SEAMLESS_BZ2(
|
|
//usage: "\n j (De)compress using bzip2"
|
|
//usage: )
|
|
//usage: IF_FEATURE_SEAMLESS_LZMA(
|
|
//usage: "\n a (De)compress using lzma"
|
|
//usage: )
|
|
//usage: "\n O Extract to stdout"
|
|
//usage: IF_FEATURE_TAR_CREATE(
|
|
//usage: "\n h Follow symlinks"
|
|
//usage: )
|
|
//usage: IF_FEATURE_TAR_NOPRESERVE_TIME(
|
|
//usage: "\n m Don't restore mtime"
|
|
//usage: )
|
|
//usage: IF_FEATURE_TAR_FROM(
|
|
//usage: IF_FEATURE_TAR_LONG_OPTIONS(
|
|
//usage: "\n exclude File to exclude"
|
|
//usage: )
|
|
//usage: "\n X File with names to exclude"
|
|
//usage: "\n T File with names to include"
|
|
//usage: )
|
|
//usage:
|
|
//usage:#define tar_example_usage
|
|
//usage: "$ zcat /tmp/tarball.tar.gz | tar -xf -\n"
|
|
//usage: "$ tar -cf /tmp/tarball.tar /usr/local\n"
|
|
|
|
// Supported but aren't in --help:
|
|
// o no-same-owner
|
|
// p same-permissions
|
|
// k keep-old
|
|
// no-recursion
|
|
// numeric-owner
|
|
// no-same-permissions
|
|
// overwrite
|
|
//IF_FEATURE_TAR_TO_COMMAND(
|
|
// to-command
|
|
//)
|
|
|
|
enum {
|
|
OPTBIT_KEEP_OLD = 8,
|
|
IF_FEATURE_TAR_CREATE( OPTBIT_CREATE ,)
|
|
IF_FEATURE_TAR_CREATE( OPTBIT_DEREFERENCE ,)
|
|
IF_FEATURE_SEAMLESS_BZ2( OPTBIT_BZIP2 ,)
|
|
IF_FEATURE_SEAMLESS_LZMA(OPTBIT_LZMA ,)
|
|
IF_FEATURE_TAR_FROM( OPTBIT_INCLUDE_FROM,)
|
|
IF_FEATURE_TAR_FROM( OPTBIT_EXCLUDE_FROM,)
|
|
IF_FEATURE_SEAMLESS_GZ( OPTBIT_GZIP ,)
|
|
IF_FEATURE_SEAMLESS_XZ( OPTBIT_XZ ,) // 16th bit
|
|
IF_FEATURE_SEAMLESS_Z( OPTBIT_COMPRESS ,)
|
|
IF_FEATURE_TAR_NOPRESERVE_TIME(OPTBIT_NOPRESERVE_TIME,)
|
|
#if ENABLE_FEATURE_TAR_LONG_OPTIONS
|
|
OPTBIT_STRIP_COMPONENTS,
|
|
OPTBIT_NORECURSION,
|
|
IF_FEATURE_TAR_TO_COMMAND(OPTBIT_2COMMAND ,)
|
|
OPTBIT_NUMERIC_OWNER,
|
|
OPTBIT_NOPRESERVE_PERM,
|
|
OPTBIT_OVERWRITE,
|
|
#endif
|
|
OPT_TEST = 1 << 0, // t
|
|
OPT_EXTRACT = 1 << 1, // x
|
|
OPT_BASEDIR = 1 << 2, // C
|
|
OPT_TARNAME = 1 << 3, // f
|
|
OPT_2STDOUT = 1 << 4, // O
|
|
OPT_NOPRESERVE_OWNER = 1 << 5, // o == no-same-owner
|
|
OPT_P = 1 << 6, // p
|
|
OPT_VERBOSE = 1 << 7, // v
|
|
OPT_KEEP_OLD = 1 << 8, // k
|
|
OPT_CREATE = IF_FEATURE_TAR_CREATE( (1 << OPTBIT_CREATE )) + 0, // c
|
|
OPT_DEREFERENCE = IF_FEATURE_TAR_CREATE( (1 << OPTBIT_DEREFERENCE )) + 0, // h
|
|
OPT_BZIP2 = IF_FEATURE_SEAMLESS_BZ2( (1 << OPTBIT_BZIP2 )) + 0, // j
|
|
OPT_LZMA = IF_FEATURE_SEAMLESS_LZMA((1 << OPTBIT_LZMA )) + 0, // a
|
|
OPT_INCLUDE_FROM = IF_FEATURE_TAR_FROM( (1 << OPTBIT_INCLUDE_FROM)) + 0, // T
|
|
OPT_EXCLUDE_FROM = IF_FEATURE_TAR_FROM( (1 << OPTBIT_EXCLUDE_FROM)) + 0, // X
|
|
OPT_GZIP = IF_FEATURE_SEAMLESS_GZ( (1 << OPTBIT_GZIP )) + 0, // z
|
|
OPT_XZ = IF_FEATURE_SEAMLESS_XZ( (1 << OPTBIT_XZ )) + 0, // J
|
|
OPT_COMPRESS = IF_FEATURE_SEAMLESS_Z( (1 << OPTBIT_COMPRESS )) + 0, // Z
|
|
OPT_NOPRESERVE_TIME = IF_FEATURE_TAR_NOPRESERVE_TIME((1 << OPTBIT_NOPRESERVE_TIME)) + 0, // m
|
|
OPT_STRIP_COMPONENTS = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_STRIP_COMPONENTS)) + 0, // strip-components
|
|
OPT_NORECURSION = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NORECURSION )) + 0, // no-recursion
|
|
OPT_2COMMAND = IF_FEATURE_TAR_TO_COMMAND( (1 << OPTBIT_2COMMAND )) + 0, // to-command
|
|
OPT_NUMERIC_OWNER = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NUMERIC_OWNER )) + 0, // numeric-owner
|
|
OPT_NOPRESERVE_PERM = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NOPRESERVE_PERM)) + 0, // no-same-permissions
|
|
OPT_OVERWRITE = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_OVERWRITE )) + 0, // overwrite
|
|
|
|
OPT_ANY_COMPRESS = (OPT_BZIP2 | OPT_LZMA | OPT_GZIP | OPT_XZ | OPT_COMPRESS),
|
|
};
|
|
#if ENABLE_FEATURE_TAR_LONG_OPTIONS
|
|
static const char tar_longopts[] ALIGN1 =
|
|
"list\0" No_argument "t"
|
|
"extract\0" No_argument "x"
|
|
"directory\0" Required_argument "C"
|
|
"file\0" Required_argument "f"
|
|
"to-stdout\0" No_argument "O"
|
|
/* do not restore owner */
|
|
/* Note: GNU tar handles 'o' as no-same-owner only on extract,
|
|
* on create, 'o' is --old-archive. We do not support --old-archive. */
|
|
"no-same-owner\0" No_argument "o"
|
|
"same-permissions\0" No_argument "p"
|
|
"verbose\0" No_argument "v"
|
|
"keep-old\0" No_argument "k"
|
|
# if ENABLE_FEATURE_TAR_CREATE
|
|
"create\0" No_argument "c"
|
|
"dereference\0" No_argument "h"
|
|
# endif
|
|
# if ENABLE_FEATURE_SEAMLESS_BZ2
|
|
"bzip2\0" No_argument "j"
|
|
# endif
|
|
# if ENABLE_FEATURE_SEAMLESS_LZMA
|
|
"lzma\0" No_argument "a"
|
|
# endif
|
|
# if ENABLE_FEATURE_TAR_FROM
|
|
"files-from\0" Required_argument "T"
|
|
"exclude-from\0" Required_argument "X"
|
|
# endif
|
|
# if ENABLE_FEATURE_SEAMLESS_GZ
|
|
"gzip\0" No_argument "z"
|
|
# endif
|
|
# if ENABLE_FEATURE_SEAMLESS_XZ
|
|
"xz\0" No_argument "J"
|
|
# endif
|
|
# if ENABLE_FEATURE_SEAMLESS_Z
|
|
"compress\0" No_argument "Z"
|
|
# endif
|
|
# if ENABLE_FEATURE_TAR_NOPRESERVE_TIME
|
|
"touch\0" No_argument "m"
|
|
# endif
|
|
"strip-components\0" Required_argument "\xf9"
|
|
"no-recursion\0" No_argument "\xfa"
|
|
# if ENABLE_FEATURE_TAR_TO_COMMAND
|
|
"to-command\0" Required_argument "\xfb"
|
|
# endif
|
|
/* use numeric uid/gid from tar header, not textual */
|
|
"numeric-owner\0" No_argument "\xfc"
|
|
/* do not restore mode */
|
|
"no-same-permissions\0" No_argument "\xfd"
|
|
/* on unpack, open with O_TRUNC and !O_EXCL */
|
|
"overwrite\0" No_argument "\xfe"
|
|
/* --exclude takes next bit position in option mask, */
|
|
/* therefore we have to put it _after_ --no-same-permissions */
|
|
# if ENABLE_FEATURE_TAR_FROM
|
|
"exclude\0" Required_argument "\xff"
|
|
# endif
|
|
;
|
|
#endif
|
|
|
|
int tar_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int tar_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
archive_handle_t *tar_handle;
|
|
char *base_dir = NULL;
|
|
const char *tar_filename = "-";
|
|
unsigned opt;
|
|
int verboseFlag = 0;
|
|
#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
|
|
llist_t *excludes = NULL;
|
|
#endif
|
|
INIT_G();
|
|
|
|
/* Initialise default values */
|
|
tar_handle = init_handle();
|
|
tar_handle->ah_flags = ARCHIVE_CREATE_LEADING_DIRS
|
|
| ARCHIVE_RESTORE_DATE
|
|
| ARCHIVE_UNLINK_OLD;
|
|
|
|
/* Apparently only root's tar preserves perms (see bug 3844) */
|
|
if (getuid() != 0)
|
|
tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_PERM;
|
|
|
|
/* Prepend '-' to the first argument if required */
|
|
opt_complementary = "--:" // first arg is options
|
|
"tt:vv:" // count -t,-v
|
|
IF_FEATURE_TAR_FROM("X::T::") // cumulative lists
|
|
#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
|
|
"\xff::" // --exclude=PATTERN is a list
|
|
#endif
|
|
IF_FEATURE_TAR_CREATE("c:") "t:x:" // at least one of these is reqd
|
|
IF_FEATURE_TAR_CREATE("c--tx:t--cx:x--ct") // mutually exclusive
|
|
IF_NOT_FEATURE_TAR_CREATE("t--x:x--t") // mutually exclusive
|
|
#if ENABLE_FEATURE_TAR_LONG_OPTIONS
|
|
":\xf9+" // --strip-components=NUM
|
|
#endif
|
|
;
|
|
#if ENABLE_FEATURE_TAR_LONG_OPTIONS
|
|
applet_long_options = tar_longopts;
|
|
#endif
|
|
#if ENABLE_DESKTOP
|
|
/* Lie to buildroot when it starts asking stupid questions. */
|
|
if (argv[1] && strcmp(argv[1], "--version") == 0) {
|
|
// Output of 'tar --version' examples:
|
|
// tar (GNU tar) 1.15.1
|
|
// tar (GNU tar) 1.25
|
|
// bsdtar 2.8.3 - libarchive 2.8.3
|
|
puts("tar (busybox) " BB_VER);
|
|
return 0;
|
|
}
|
|
if (argv[1] && argv[1][0] != '-') {
|
|
/* Compat:
|
|
* 1st argument without dash handles options with parameters
|
|
* differently from dashed one: it takes *next argv[i]*
|
|
* as paramenter even if there are more chars in 1st argument:
|
|
* "tar fx TARFILE" - "x" is not taken as f's param
|
|
* but is interpreted as -x option
|
|
* "tar -xf TARFILE" - dashed equivalent of the above
|
|
* "tar -fx ..." - "x" is taken as f's param
|
|
* getopt32 wouldn't handle 1st command correctly.
|
|
* Unfortunately, people do use such commands.
|
|
* We massage argv[1] to work around it by moving 'f'
|
|
* to the end of the string.
|
|
* More contrived "tar fCx TARFILE DIR" still fails,
|
|
* but such commands are much less likely to be used.
|
|
*/
|
|
char *f = strchr(argv[1], 'f');
|
|
if (f) {
|
|
while (f[1] != '\0') {
|
|
*f = f[1];
|
|
f++;
|
|
}
|
|
*f = 'f';
|
|
}
|
|
}
|
|
#endif
|
|
opt = getopt32(argv,
|
|
"txC:f:Oopvk"
|
|
IF_FEATURE_TAR_CREATE( "ch" )
|
|
IF_FEATURE_SEAMLESS_BZ2( "j" )
|
|
IF_FEATURE_SEAMLESS_LZMA("a" )
|
|
IF_FEATURE_TAR_FROM( "T:X:")
|
|
IF_FEATURE_SEAMLESS_GZ( "z" )
|
|
IF_FEATURE_SEAMLESS_XZ( "J" )
|
|
IF_FEATURE_SEAMLESS_Z( "Z" )
|
|
IF_FEATURE_TAR_NOPRESERVE_TIME("m")
|
|
IF_FEATURE_TAR_LONG_OPTIONS("\xf9:") // --strip-components
|
|
, &base_dir // -C dir
|
|
, &tar_filename // -f filename
|
|
IF_FEATURE_TAR_FROM(, &(tar_handle->accept)) // T
|
|
IF_FEATURE_TAR_FROM(, &(tar_handle->reject)) // X
|
|
#if ENABLE_FEATURE_TAR_LONG_OPTIONS
|
|
, &tar_handle->tar__strip_components // --strip-components
|
|
#endif
|
|
IF_FEATURE_TAR_TO_COMMAND(, &(tar_handle->tar__to_command)) // --to-command
|
|
#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
|
|
, &excludes // --exclude
|
|
#endif
|
|
, &verboseFlag // combined count for -t and -v
|
|
, &verboseFlag // combined count for -t and -v
|
|
);
|
|
#if DBG_OPTION_PARSING
|
|
bb_error_msg("opt: 0x%08x", opt);
|
|
# define showopt(o) bb_error_msg("opt & %s(%x): %x", #o, o, opt & o);
|
|
showopt(OPT_TEST );
|
|
showopt(OPT_EXTRACT );
|
|
showopt(OPT_BASEDIR );
|
|
showopt(OPT_TARNAME );
|
|
showopt(OPT_2STDOUT );
|
|
showopt(OPT_NOPRESERVE_OWNER);
|
|
showopt(OPT_P );
|
|
showopt(OPT_VERBOSE );
|
|
showopt(OPT_KEEP_OLD );
|
|
showopt(OPT_CREATE );
|
|
showopt(OPT_DEREFERENCE );
|
|
showopt(OPT_BZIP2 );
|
|
showopt(OPT_LZMA );
|
|
showopt(OPT_INCLUDE_FROM );
|
|
showopt(OPT_EXCLUDE_FROM );
|
|
showopt(OPT_GZIP );
|
|
showopt(OPT_XZ );
|
|
showopt(OPT_COMPRESS );
|
|
showopt(OPT_NOPRESERVE_TIME );
|
|
showopt(OPT_STRIP_COMPONENTS);
|
|
showopt(OPT_NORECURSION );
|
|
showopt(OPT_2COMMAND );
|
|
showopt(OPT_NUMERIC_OWNER );
|
|
showopt(OPT_NOPRESERVE_PERM );
|
|
showopt(OPT_OVERWRITE );
|
|
showopt(OPT_ANY_COMPRESS );
|
|
bb_error_msg("base_dir:'%s'", base_dir);
|
|
bb_error_msg("tar_filename:'%s'", tar_filename);
|
|
bb_error_msg("verboseFlag:%d", verboseFlag);
|
|
bb_error_msg("tar_handle->tar__to_command:'%s'", tar_handle->tar__to_command);
|
|
bb_error_msg("tar_handle->tar__strip_components:%u", tar_handle->tar__strip_components);
|
|
return 0;
|
|
# undef showopt
|
|
#endif
|
|
argv += optind;
|
|
|
|
if (verboseFlag)
|
|
tar_handle->action_header = header_verbose_list;
|
|
if (verboseFlag == 1)
|
|
tar_handle->action_header = header_list;
|
|
|
|
if (opt & OPT_EXTRACT)
|
|
tar_handle->action_data = data_extract_all;
|
|
|
|
if (opt & OPT_2STDOUT)
|
|
tar_handle->action_data = data_extract_to_stdout;
|
|
|
|
if (opt & OPT_2COMMAND) {
|
|
putenv((char*)"TAR_FILETYPE=f");
|
|
signal(SIGPIPE, SIG_IGN);
|
|
tar_handle->action_data = data_extract_to_command;
|
|
IF_FEATURE_TAR_TO_COMMAND(tar_handle->tar__to_command_shell = xstrdup(get_shell_name());)
|
|
}
|
|
|
|
if (opt & OPT_KEEP_OLD)
|
|
tar_handle->ah_flags &= ~ARCHIVE_UNLINK_OLD;
|
|
|
|
if (opt & OPT_NUMERIC_OWNER)
|
|
tar_handle->ah_flags |= ARCHIVE_NUMERIC_OWNER;
|
|
|
|
if (opt & OPT_NOPRESERVE_OWNER)
|
|
tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_OWNER;
|
|
|
|
if (opt & OPT_NOPRESERVE_PERM)
|
|
tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_PERM;
|
|
|
|
if (opt & OPT_OVERWRITE) {
|
|
tar_handle->ah_flags &= ~ARCHIVE_UNLINK_OLD;
|
|
tar_handle->ah_flags |= ARCHIVE_O_TRUNC;
|
|
}
|
|
|
|
if (opt & OPT_NOPRESERVE_TIME)
|
|
tar_handle->ah_flags &= ~ARCHIVE_RESTORE_DATE;
|
|
|
|
#if ENABLE_FEATURE_TAR_FROM
|
|
tar_handle->reject = append_file_list_to_list(tar_handle->reject);
|
|
# if ENABLE_FEATURE_TAR_LONG_OPTIONS
|
|
/* Append excludes to reject */
|
|
while (excludes) {
|
|
llist_t *next = excludes->link;
|
|
excludes->link = tar_handle->reject;
|
|
tar_handle->reject = excludes;
|
|
excludes = next;
|
|
}
|
|
# endif
|
|
tar_handle->accept = append_file_list_to_list(tar_handle->accept);
|
|
#endif
|
|
|
|
/* Setup an array of filenames to work with */
|
|
/* TODO: This is the same as in ar, make a separate function? */
|
|
while (*argv) {
|
|
/* kill trailing '/' unless the string is just "/" */
|
|
char *cp = last_char_is(*argv, '/');
|
|
if (cp > *argv)
|
|
*cp = '\0';
|
|
llist_add_to_end(&tar_handle->accept, *argv);
|
|
argv++;
|
|
}
|
|
|
|
if (tar_handle->accept || tar_handle->reject)
|
|
tar_handle->filter = filter_accept_reject_list;
|
|
|
|
/* Open the tar file */
|
|
{
|
|
int tar_fd = STDIN_FILENO;
|
|
int flags = O_RDONLY;
|
|
|
|
if (opt & OPT_CREATE) {
|
|
/* Make sure there is at least one file to tar up */
|
|
if (tar_handle->accept == NULL)
|
|
bb_error_msg_and_die("empty archive");
|
|
|
|
tar_fd = STDOUT_FILENO;
|
|
/* Mimicking GNU tar 1.15.1: */
|
|
flags = O_WRONLY | O_CREAT | O_TRUNC;
|
|
}
|
|
|
|
if (LONE_DASH(tar_filename)) {
|
|
tar_handle->src_fd = tar_fd;
|
|
tar_handle->seek = seek_by_read;
|
|
} else {
|
|
if (ENABLE_FEATURE_TAR_AUTODETECT
|
|
&& flags == O_RDONLY
|
|
&& !(opt & OPT_ANY_COMPRESS)
|
|
) {
|
|
tar_handle->src_fd = open_zipped(tar_filename, /*fail_if_not_compressed:*/ 0);
|
|
if (tar_handle->src_fd < 0)
|
|
bb_perror_msg_and_die("can't open '%s'", tar_filename);
|
|
} else {
|
|
tar_handle->src_fd = xopen(tar_filename, flags);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (base_dir)
|
|
xchdir(base_dir);
|
|
|
|
//if (SEAMLESS_COMPRESSION)
|
|
// /* We need to know whether child (gzip/bzip/etc) exits abnormally */
|
|
// signal(SIGCHLD, check_errors_in_children);
|
|
|
|
/* Create an archive */
|
|
if (opt & OPT_CREATE) {
|
|
#if SEAMLESS_COMPRESSION
|
|
const char *zipMode = NULL;
|
|
if (opt & OPT_COMPRESS)
|
|
zipMode = "compress";
|
|
if (opt & OPT_GZIP)
|
|
zipMode = "gzip";
|
|
if (opt & OPT_BZIP2)
|
|
zipMode = "bzip2";
|
|
if (opt & OPT_LZMA)
|
|
zipMode = "lzma";
|
|
if (opt & OPT_XZ)
|
|
zipMode = "xz";
|
|
#endif
|
|
/* NB: writeTarFile() closes tar_handle->src_fd */
|
|
return writeTarFile(tar_handle->src_fd, verboseFlag,
|
|
(opt & OPT_DEREFERENCE ? ACTION_FOLLOWLINKS : 0)
|
|
| (opt & OPT_NORECURSION ? 0 : ACTION_RECURSE),
|
|
tar_handle->accept,
|
|
tar_handle->reject, zipMode);
|
|
}
|
|
|
|
if (opt & OPT_ANY_COMPRESS) {
|
|
USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_state_t *xstate);)
|
|
USE_FOR_NOMMU(const char *xformer_prog;)
|
|
|
|
if (opt & OPT_COMPRESS)
|
|
USE_FOR_MMU(xformer = unpack_Z_stream;)
|
|
USE_FOR_NOMMU(xformer_prog = "uncompress";)
|
|
if (opt & OPT_GZIP)
|
|
USE_FOR_MMU(xformer = unpack_gz_stream;)
|
|
USE_FOR_NOMMU(xformer_prog = "gunzip";)
|
|
if (opt & OPT_BZIP2)
|
|
USE_FOR_MMU(xformer = unpack_bz2_stream;)
|
|
USE_FOR_NOMMU(xformer_prog = "bunzip2";)
|
|
if (opt & OPT_LZMA)
|
|
USE_FOR_MMU(xformer = unpack_lzma_stream;)
|
|
USE_FOR_NOMMU(xformer_prog = "unlzma";)
|
|
if (opt & OPT_XZ)
|
|
USE_FOR_MMU(xformer = unpack_xz_stream;)
|
|
USE_FOR_NOMMU(xformer_prog = "unxz";)
|
|
|
|
fork_transformer_with_sig(tar_handle->src_fd, xformer, xformer_prog);
|
|
/* Can't lseek over pipes */
|
|
tar_handle->seek = seek_by_read;
|
|
/*tar_handle->offset = 0; - already is */
|
|
}
|
|
|
|
/* Zero processed headers (== empty file) is not a valid tarball.
|
|
* We (ab)use bb_got_signal as exitcode here,
|
|
* because check_errors_in_children() uses _it_ as error indicator.
|
|
*/
|
|
bb_got_signal = EXIT_FAILURE;
|
|
|
|
while (get_header_tar(tar_handle) == EXIT_SUCCESS)
|
|
bb_got_signal = EXIT_SUCCESS; /* saw at least one header, good */
|
|
|
|
/* Check that every file that should have been extracted was */
|
|
while (tar_handle->accept) {
|
|
if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
|
|
&& !find_list_entry(tar_handle->passed, tar_handle->accept->data)
|
|
) {
|
|
bb_error_msg_and_die("%s: not found in archive",
|
|
tar_handle->accept->data);
|
|
}
|
|
tar_handle->accept = tar_handle->accept->link;
|
|
}
|
|
if (ENABLE_FEATURE_CLEAN_UP /* && tar_handle->src_fd != STDIN_FILENO */)
|
|
close(tar_handle->src_fd);
|
|
|
|
if (SEAMLESS_COMPRESSION || OPT_COMPRESS) {
|
|
/* Set bb_got_signal to 1 if a child died with !0 exitcode */
|
|
check_errors_in_children(0);
|
|
}
|
|
|
|
return bb_got_signal;
|
|
}
|