blob: 224cb47d1559cee4d7da7e4029e3b1563dbefb5f [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersencc8ed391999-10-05 16:24:54 +00002/*
Eric Andersenc7bda1c2004-03-15 08:29:22 +00003 * Mini tar implementation for busybox
Erik Andersen6acaa402000-03-26 14:03:20 +00004 *
Eric Andersenaff114c2004-04-14 17:51:38 +00005 * Modified to use common extraction code used by ar, cpio, dpkg-deb, dpkg
Denis Vlasenko0beaff82007-09-21 13:16:32 +00006 * by Glenn McGrath
Glenn L McGrath2e772ed2001-10-05 02:58:48 +00007 *
Erik Andersen61677fe2000-04-13 01:18:56 +00008 * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
Eric Andersenaff114c2004-04-14 17:51:38 +00009 * ground up. It still has remnants of the old code lying about, but it is
Eric Andersen77d92682001-05-23 20:32:09 +000010 * very different now (i.e., cleaner, less global variables, etc.)
Eric Andersenc4996011999-10-20 22:08:37 +000011 *
Eric Andersenc7bda1c2004-03-15 08:29:22 +000012 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
Eric Andersen96bcfd31999-11-12 01:30:18 +000013 *
Erik Andersen6acaa402000-03-26 14:03:20 +000014 * Based in part in the tar implementation in sash
15 * Copyright (c) 1999 by David I. Bell
16 * Permission is granted to use, distribute, or modify this source,
17 * provided that this copyright notice remains intact.
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +020018 * Permission to distribute sash derived code under GPL has been granted.
Erik Andersen6acaa402000-03-26 14:03:20 +000019 *
Erik Andersen68a9ea42000-04-04 18:39:50 +000020 * Based in part on the tar implementation from busybox-0.28
Erik Andersen6acaa402000-03-26 14:03:20 +000021 * Copyright (C) 1995 Bruce Perens
Erik Andersen6acaa402000-03-26 14:03:20 +000022 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +020023 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
Eric Andersencc8ed391999-10-05 16:24:54 +000024 */
Denys Vlasenkof6beef62013-11-14 11:39:00 +010025//config:config TAR
Denys Vlasenko4eed2c62017-07-18 22:01:24 +020026//config: bool "tar (40 kb)"
Denys Vlasenkof6beef62013-11-14 11:39:00 +010027//config: default y
28//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020029//config: tar is an archiving program. It's commonly used with gzip to
30//config: create compressed archives. It's probably the most widely used
31//config: UNIX archive program.
Denys Vlasenkof6beef62013-11-14 11:39:00 +010032//config:
Denys Vlasenkof5604222017-01-10 14:58:54 +010033//config:config FEATURE_TAR_LONG_OPTIONS
34//config: bool "Enable long options"
35//config: default y
36//config: depends on TAR && LONG_OPTS
37//config:
Denys Vlasenkof6beef62013-11-14 11:39:00 +010038//config:config FEATURE_TAR_CREATE
Denys Vlasenkof5604222017-01-10 14:58:54 +010039//config: bool "Enable -c (archive creation)"
Denys Vlasenkof6beef62013-11-14 11:39:00 +010040//config: default y
41//config: depends on TAR
Denys Vlasenkof6beef62013-11-14 11:39:00 +010042//config:
43//config:config FEATURE_TAR_AUTODETECT
44//config: bool "Autodetect compressed tarballs"
45//config: default y
46//config: depends on TAR && (FEATURE_SEAMLESS_Z || FEATURE_SEAMLESS_GZ || FEATURE_SEAMLESS_BZ2 || FEATURE_SEAMLESS_LZMA || FEATURE_SEAMLESS_XZ)
47//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020048//config: With this option tar can automatically detect compressed
49//config: tarballs. Currently it works only on files (not pipes etc).
Denys Vlasenkof6beef62013-11-14 11:39:00 +010050//config:
51//config:config FEATURE_TAR_FROM
Denys Vlasenko931cf642017-11-13 01:40:28 +010052//config: bool "Enable -X (exclude from) and -T (include from) options"
Denys Vlasenkof6beef62013-11-14 11:39:00 +010053//config: default y
54//config: depends on TAR
55//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020056//config: If you enable this option you'll be able to specify
57//config: a list of files to include or exclude from an archive.
Denys Vlasenkof6beef62013-11-14 11:39:00 +010058//config:
59//config:config FEATURE_TAR_OLDGNU_COMPATIBILITY
Denys Vlasenkof5604222017-01-10 14:58:54 +010060//config: bool "Support old tar header format"
Denys Vlasenkof6beef62013-11-14 11:39:00 +010061//config: default y
62//config: depends on TAR || DPKG
63//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020064//config: This option is required to unpack archives created in
65//config: the old GNU format; help to kill this old format by
66//config: repacking your ancient archives with the new format.
Denys Vlasenkof6beef62013-11-14 11:39:00 +010067//config:
68//config:config FEATURE_TAR_OLDSUN_COMPATIBILITY
69//config: bool "Enable untarring of tarballs with checksums produced by buggy Sun tar"
70//config: default y
71//config: depends on TAR || DPKG
72//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020073//config: This option is required to unpack archives created by some old
74//config: version of Sun's tar (it was calculating checksum using signed
75//config: arithmetic). It is said to be fixed in newer Sun tar, but "old"
76//config: tarballs still exist.
Denys Vlasenkof6beef62013-11-14 11:39:00 +010077//config:
78//config:config FEATURE_TAR_GNU_EXTENSIONS
Denys Vlasenkof5604222017-01-10 14:58:54 +010079//config: bool "Support GNU tar extensions (long filenames)"
Denys Vlasenkof6beef62013-11-14 11:39:00 +010080//config: default y
81//config: depends on TAR || DPKG
Denys Vlasenkof6beef62013-11-14 11:39:00 +010082//config:
83//config:config FEATURE_TAR_TO_COMMAND
Denys Vlasenkof5604222017-01-10 14:58:54 +010084//config: bool "Support writing to an external program (--to-command)"
Denys Vlasenkof6beef62013-11-14 11:39:00 +010085//config: default y
86//config: depends on TAR && FEATURE_TAR_LONG_OPTIONS
87//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020088//config: If you enable this option you'll be able to instruct tar to send
89//config: the contents of each extracted file to the standard input of an
90//config: external program.
Denys Vlasenkof6beef62013-11-14 11:39:00 +010091//config:
92//config:config FEATURE_TAR_UNAME_GNAME
93//config: bool "Enable use of user and group names"
94//config: default y
95//config: depends on TAR
96//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020097//config: Enable use of user and group names in tar. This affects contents
98//config: listings (-t) and preserving permissions when unpacking (-p).
99//config: +200 bytes.
Denys Vlasenkof6beef62013-11-14 11:39:00 +0100100//config:
101//config:config FEATURE_TAR_NOPRESERVE_TIME
Denys Vlasenkof5604222017-01-10 14:58:54 +0100102//config: bool "Enable -m (do not preserve time) GNU option"
Denys Vlasenkof6beef62013-11-14 11:39:00 +0100103//config: default y
104//config: depends on TAR
Denys Vlasenkof6beef62013-11-14 11:39:00 +0100105//config:
106//config:config FEATURE_TAR_SELINUX
Denys Vlasenkof5604222017-01-10 14:58:54 +0100107//config: bool "Support extracting SELinux labels"
Denys Vlasenkof6beef62013-11-14 11:39:00 +0100108//config: default n
109//config: depends on TAR && SELINUX
110//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +0200111//config: With this option busybox supports restoring SELinux labels
112//config: when extracting files from tar archives.
Denys Vlasenkof6beef62013-11-14 11:39:00 +0100113
Denys Vlasenko36184a42013-11-14 09:54:24 +0100114//applet:IF_TAR(APPLET(tar, BB_DIR_BIN, BB_SUID_DROP))
Denys Vlasenko0c4dbd42017-09-18 16:28:43 +0200115
Denys Vlasenko66620fa2013-11-14 09:53:52 +0100116//kbuild:lib-$(CONFIG_TAR) += tar.o
117
Rob Landley1bfca7b2006-09-10 03:20:37 +0000118#include <fnmatch.h>
Denis Vlasenkob6adbf12007-05-26 19:00:18 +0000119#include "libbb.h"
Denys Vlasenkoe6a2f4c2016-04-21 16:26:30 +0200120#include "common_bufsiz.h"
Denys Vlasenkod184a722011-09-22 12:45:14 +0200121#include "bb_archive.h"
Denis Vlasenko87cf2ee2008-02-13 17:06:53 +0000122/* FIXME: Stop using this non-standard feature */
123#ifndef FNM_LEADING_DIR
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100124# define FNM_LEADING_DIR 0
Denis Vlasenko87cf2ee2008-02-13 17:06:53 +0000125#endif
126
Denys Vlasenko6c563e32015-10-22 01:07:13 +0200127#if 0
128# define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
129#else
130# define DBG(...) ((void)0)
131#endif
132#define DBG_OPTION_PARSING 0
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100133
134
Denis Vlasenko74324c82007-06-04 10:16:52 +0000135#define block_buf bb_common_bufsiz1
Denys Vlasenko9de2e5a2016-04-21 18:38:51 +0200136#define INIT_G() do { setup_common_bufsiz(); } while (0)
Denis Vlasenko74324c82007-06-04 10:16:52 +0000137
Denis Vlasenko431a7c92008-02-19 11:26:28 +0000138
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000139#if ENABLE_FEATURE_TAR_CREATE
Eric Andersencc8ed391999-10-05 16:24:54 +0000140
Eric Andersen3d957c82000-12-07 00:34:58 +0000141/*
Denis Vlasenko4fbb5842006-11-24 14:55:23 +0000142** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
Eric Andersen3d957c82000-12-07 00:34:58 +0000143** the only functions that deal with the HardLinkInfo structure.
144** Even these functions use the xxxHardLinkInfo() functions.
145*/
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100146typedef struct HardLinkInfo {
147 struct HardLinkInfo *next; /* Next entry in list */
148 dev_t dev; /* Device number */
149 ino_t ino; /* Inode number */
150// short linkCount; /* (Hard) Link Count */
151 char name[1]; /* Start of filename (must be last) */
152} HardLinkInfo;
Eric Andersen3d957c82000-12-07 00:34:58 +0000153
Erik Andersen68a9ea42000-04-04 18:39:50 +0000154/* Some info to be carried along when creating a new tarball */
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100155typedef struct TarBallInfo {
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000156 int tarFd; /* Open-for-write file descriptor
157 * for the tarball */
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000158 int verboseFlag; /* Whether to print extra stuff or not */
Denys Vlasenko931cf642017-11-13 01:40:28 +0100159# if ENABLE_FEATURE_TAR_FROM
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000160 const llist_t *excludeList; /* List of files to not include */
Denys Vlasenko931cf642017-11-13 01:40:28 +0100161# endif
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000162 HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
163 HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100164//TODO: save only st_dev + st_ino
165 struct stat tarFileStatBuf; /* Stat info for the tarball, letting
166 * us know the inode and device that the
167 * tarball lives, so we can avoid trying
168 * to include the tarball into itself */
169} TarBallInfo;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000170
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000171/* A nice enum with all the possible tar file content types */
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100172enum {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000173 REGTYPE = '0', /* regular file */
174 REGTYPE0 = '\0', /* regular file (ancient bug compat) */
175 LNKTYPE = '1', /* hard link */
176 SYMTYPE = '2', /* symbolic link */
177 CHRTYPE = '3', /* character special */
178 BLKTYPE = '4', /* block special */
179 DIRTYPE = '5', /* directory */
180 FIFOTYPE = '6', /* FIFO special */
181 CONTTYPE = '7', /* reserved */
182 GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
183 GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000184};
Erik Andersen68a9ea42000-04-04 18:39:50 +0000185
Eric Andersen3d957c82000-12-07 00:34:58 +0000186/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
Denis Vlasenko7e0fbf92007-09-04 19:33:22 +0000187static void addHardLinkInfo(HardLinkInfo **hlInfoHeadPtr,
Glenn L McGrathf66de642002-11-25 23:57:27 +0000188 struct stat *statbuf,
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000189 const char *fileName)
Eric Andersen3d957c82000-12-07 00:34:58 +0000190{
191 /* Note: hlInfoHeadPtr can never be NULL! */
192 HardLinkInfo *hlInfo;
193
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000194 hlInfo = xmalloc(sizeof(HardLinkInfo) + strlen(fileName));
Glenn L McGrathf66de642002-11-25 23:57:27 +0000195 hlInfo->next = *hlInfoHeadPtr;
196 *hlInfoHeadPtr = hlInfo;
197 hlInfo->dev = statbuf->st_dev;
198 hlInfo->ino = statbuf->st_ino;
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100199// hlInfo->linkCount = statbuf->st_nlink;
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000200 strcpy(hlInfo->name, fileName);
Eric Andersen3d957c82000-12-07 00:34:58 +0000201}
202
Denis Vlasenko7e0fbf92007-09-04 19:33:22 +0000203static void freeHardLinkInfo(HardLinkInfo **hlInfoHeadPtr)
Eric Andersen3d957c82000-12-07 00:34:58 +0000204{
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000205 HardLinkInfo *hlInfo;
206 HardLinkInfo *hlInfoNext;
Eric Andersen3d957c82000-12-07 00:34:58 +0000207
208 if (hlInfoHeadPtr) {
209 hlInfo = *hlInfoHeadPtr;
210 while (hlInfo) {
211 hlInfoNext = hlInfo->next;
212 free(hlInfo);
213 hlInfo = hlInfoNext;
214 }
215 *hlInfoHeadPtr = NULL;
216 }
Eric Andersen3d957c82000-12-07 00:34:58 +0000217}
218
Denys Vlasenkod43d6282009-11-29 16:28:33 +0100219/* Might be faster (and bigger) if the dev/ino were stored in numeric order ;) */
220static HardLinkInfo *findHardLinkInfo(HardLinkInfo *hlInfo, struct stat *statbuf)
Eric Andersen3d957c82000-12-07 00:34:58 +0000221{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000222 while (hlInfo) {
Denys Vlasenkod43d6282009-11-29 16:28:33 +0100223 if (statbuf->st_ino == hlInfo->ino
224 && statbuf->st_dev == hlInfo->dev
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100225 ) {
226 DBG("found hardlink:'%s'", hlInfo->name);
Eric Andersen3d957c82000-12-07 00:34:58 +0000227 break;
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100228 }
Eric Andersen3d957c82000-12-07 00:34:58 +0000229 hlInfo = hlInfo->next;
230 }
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000231 return hlInfo;
Eric Andersen3d957c82000-12-07 00:34:58 +0000232}
233
Erik Andersen6acaa402000-03-26 14:03:20 +0000234/* Put an octal string into the specified buffer.
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000235 * The number is zero padded and possibly null terminated.
Denis Vlasenko87cd4a82006-11-25 23:47:32 +0000236 * Stores low-order bits only if whole value does not fit. */
237static void putOctal(char *cp, int len, off_t value)
Erik Andersen6acaa402000-03-26 14:03:20 +0000238{
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100239 char tempBuffer[sizeof(off_t)*3 + 1];
Erik Andersen5661fe02000-04-05 01:00:52 +0000240 char *tempString = tempBuffer;
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000241 int width;
Erik Andersen6acaa402000-03-26 14:03:20 +0000242
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000243 width = sprintf(tempBuffer, "%0*"OFF_FMT"o", len, value);
244 tempString += (width - len);
Erik Andersen6acaa402000-03-26 14:03:20 +0000245
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000246 /* If string has leading zeroes, we can drop one */
247 /* and field will have trailing '\0' */
248 /* (increases chances of compat with other tars) */
249 if (tempString[0] == '0')
250 tempString++;
Erik Andersen6acaa402000-03-26 14:03:20 +0000251
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000252 /* Copy the string to the field */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000253 memcpy(cp, tempString, len);
Erik Andersen6acaa402000-03-26 14:03:20 +0000254}
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000255#define PUT_OCTAL(a, b) putOctal((a), sizeof(a), (b))
256
Denys Vlasenko52827e32010-06-26 18:21:36 +0200257static void chksum_and_xwrite(int fd, struct tar_header_t* hp)
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000258{
Denis Vlasenkodcbd51d2007-03-03 20:06:59 +0000259 /* POSIX says that checksum is done on unsigned bytes
Denis Vlasenko940494f2007-03-04 18:09:50 +0000260 * (Sun and HP-UX gets it wrong... more details in
Denis Vlasenkodcbd51d2007-03-03 20:06:59 +0000261 * GNU tar source) */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000262 const unsigned char *cp;
263 int chksum, size;
264
265 strcpy(hp->magic, "ustar ");
266
267 /* Calculate and store the checksum (i.e., the sum of all of the bytes of
268 * the header). The checksum field must be filled with blanks for the
269 * calculation. The checksum field is formatted differently from the
270 * other fields: it has 6 digits, a null, then a space -- rather than
271 * digits, followed by a null like the other fields... */
272 memset(hp->chksum, ' ', sizeof(hp->chksum));
273 cp = (const unsigned char *) hp;
274 chksum = 0;
275 size = sizeof(*hp);
276 do { chksum += *cp++; } while (--size);
277 putOctal(hp->chksum, sizeof(hp->chksum)-1, chksum);
278
279 /* Now write the header out to disk */
280 xwrite(fd, hp, sizeof(*hp));
281}
282
Denys Vlasenko931cf642017-11-13 01:40:28 +0100283# if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000284static void writeLongname(int fd, int type, const char *name, int dir)
285{
286 static const struct {
287 char mode[8]; /* 100-107 */
288 char uid[8]; /* 108-115 */
289 char gid[8]; /* 116-123 */
290 char size[12]; /* 124-135 */
291 char mtime[12]; /* 136-147 */
292 } prefilled = {
293 "0000000",
294 "0000000",
295 "0000000",
296 "00000000000",
297 "00000000000",
298 };
Denys Vlasenko52827e32010-06-26 18:21:36 +0200299 struct tar_header_t header;
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000300 int size;
301
302 dir = !!dir; /* normalize: 0/1 */
303 size = strlen(name) + 1 + dir; /* GNU tar uses strlen+1 */
304 /* + dir: account for possible '/' */
305
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000306 memset(&header, 0, sizeof(header));
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000307 strcpy(header.name, "././@LongLink");
308 memcpy(header.mode, prefilled.mode, sizeof(prefilled));
309 PUT_OCTAL(header.size, size);
310 header.typeflag = type;
311 chksum_and_xwrite(fd, &header);
312
313 /* Write filename[/] and pad the block. */
314 /* dir=0: writes 'name<NUL>', pads */
315 /* dir=1: writes 'name', writes '/<NUL>', pads */
316 dir *= 2;
317 xwrite(fd, name, size - dir);
318 xwrite(fd, "/", dir);
319 size = (-size) & (TAR_BLOCK_SIZE-1);
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000320 memset(&header, 0, size);
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000321 xwrite(fd, &header, size);
322}
Denys Vlasenko931cf642017-11-13 01:40:28 +0100323# endif
Erik Andersen6acaa402000-03-26 14:03:20 +0000324
Erik Andersen68a9ea42000-04-04 18:39:50 +0000325/* Write out a tar header for the specified file/directory/whatever */
Rob Landley88621d72006-08-29 19:41:06 +0000326static int writeTarHeader(struct TarBallInfo *tbInfo,
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000327 const char *header_name, const char *fileName, struct stat *statbuf)
Erik Andersen6acaa402000-03-26 14:03:20 +0000328{
Denys Vlasenko52827e32010-06-26 18:21:36 +0200329 struct tar_header_t header;
Erik Andersen3364d782000-03-28 00:58:14 +0000330
Denys Vlasenko52827e32010-06-26 18:21:36 +0200331 memset(&header, 0, sizeof(header));
Denys Vlasenko8f65b0c2010-07-06 18:46:02 +0200332
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000333 strncpy(header.name, header_name, sizeof(header.name));
Erik Andersenecd51242000-04-08 03:08:21 +0000334
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000335 /* POSIX says to mask mode with 07777. */
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000336 PUT_OCTAL(header.mode, statbuf->st_mode & 07777);
337 PUT_OCTAL(header.uid, statbuf->st_uid);
338 PUT_OCTAL(header.gid, statbuf->st_gid);
Denis Vlasenkob8a8e602006-11-24 14:59:45 +0000339 memset(header.size, '0', sizeof(header.size)-1); /* Regular file size is handled later */
Denys Vlasenko9180c602011-05-04 21:14:12 +0200340 /* users report that files with negative st_mtime cause trouble, so: */
341 PUT_OCTAL(header.mtime, statbuf->st_mtime >= 0 ? statbuf->st_mtime : 0);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000342
Denis Vlasenkoc50f3702006-11-24 14:57:31 +0000343 /* Enter the user and group names */
344 safe_strncpy(header.uname, get_cached_username(statbuf->st_uid), sizeof(header.uname));
345 safe_strncpy(header.gname, get_cached_groupname(statbuf->st_gid), sizeof(header.gname));
Erik Andersen5661fe02000-04-05 01:00:52 +0000346
Eric Andersen3d957c82000-12-07 00:34:58 +0000347 if (tbInfo->hlInfo) {
348 /* This is a hard link */
349 header.typeflag = LNKTYPE;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000350 strncpy(header.linkname, tbInfo->hlInfo->name,
351 sizeof(header.linkname));
Denys Vlasenko931cf642017-11-13 01:40:28 +0100352# if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000353 /* Write out long linkname if needed */
354 if (header.linkname[sizeof(header.linkname)-1])
355 writeLongname(tbInfo->tarFd, GNULONGLINK,
356 tbInfo->hlInfo->name, 0);
Denys Vlasenko931cf642017-11-13 01:40:28 +0100357# endif
Eric Andersen3d957c82000-12-07 00:34:58 +0000358 } else if (S_ISLNK(statbuf->st_mode)) {
Denis Vlasenko6ca04442007-02-11 16:19:28 +0000359 char *lpath = xmalloc_readlink_or_warn(fileName);
360 if (!lpath)
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000361 return FALSE;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000362 header.typeflag = SYMTYPE;
363 strncpy(header.linkname, lpath, sizeof(header.linkname));
Denys Vlasenko931cf642017-11-13 01:40:28 +0100364# if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000365 /* Write out long linkname if needed */
366 if (header.linkname[sizeof(header.linkname)-1])
367 writeLongname(tbInfo->tarFd, GNULONGLINK, lpath, 0);
Denys Vlasenko931cf642017-11-13 01:40:28 +0100368# else
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000369 /* If it is larger than 100 bytes, bail out */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000370 if (header.linkname[sizeof(header.linkname)-1]) {
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000371 free(lpath);
372 bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
373 return FALSE;
374 }
Denys Vlasenko931cf642017-11-13 01:40:28 +0100375# endif
Mark Whitley8a633262001-04-30 18:17:00 +0000376 free(lpath);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000377 } else if (S_ISDIR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000378 header.typeflag = DIRTYPE;
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000379 /* Append '/' only if there is a space for it */
380 if (!header.name[sizeof(header.name)-1])
381 header.name[strlen(header.name)] = '/';
Erik Andersen68a9ea42000-04-04 18:39:50 +0000382 } else if (S_ISCHR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000383 header.typeflag = CHRTYPE;
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000384 PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
385 PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000386 } else if (S_ISBLK(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000387 header.typeflag = BLKTYPE;
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000388 PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
389 PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000390 } else if (S_ISFIFO(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000391 header.typeflag = FIFOTYPE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000392 } else if (S_ISREG(statbuf->st_mode)) {
Denys Vlasenko9180c602011-05-04 21:14:12 +0200393 /* header.size field is 12 bytes long */
394 /* Does octal-encoded size fit? */
395 uoff_t filesize = statbuf->st_size;
396 if (sizeof(filesize) <= 4
397 || filesize <= (uoff_t)0777777777777LL
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000398 ) {
Denys Vlasenko9180c602011-05-04 21:14:12 +0200399 PUT_OCTAL(header.size, filesize);
400 }
401 /* Does base256-encoded size fit?
402 * It always does unless off_t is wider than 64 bits.
403 */
404 else if (ENABLE_FEATURE_TAR_GNU_EXTENSIONS
Denys Vlasenko931cf642017-11-13 01:40:28 +0100405# if ULLONG_MAX > 0xffffffffffffffffLL /* 2^64-1 */
Denys Vlasenko9180c602011-05-04 21:14:12 +0200406 && (filesize <= 0x3fffffffffffffffffffffffLL)
Denys Vlasenko931cf642017-11-13 01:40:28 +0100407# endif
Denys Vlasenko9180c602011-05-04 21:14:12 +0200408 ) {
Denys Vlasenko69675782013-01-14 01:34:48 +0100409 /* GNU tar uses "base-256 encoding" for very large numbers.
410 * Encoding is binary, with highest bit always set as a marker
411 * and sign in next-highest bit:
412 * 80 00 .. 00 - zero
413 * bf ff .. ff - largest positive number
414 * ff ff .. ff - minus 1
415 * c0 00 .. 00 - smallest negative number
Denys Vlasenko9180c602011-05-04 21:14:12 +0200416 */
417 char *p8 = header.size + sizeof(header.size);
418 do {
419 *--p8 = (uint8_t)filesize;
420 filesize >>= 8;
421 } while (p8 != header.size);
422 *p8 |= 0x80;
423 } else {
Denys Vlasenko6331cf02009-11-13 09:08:27 +0100424 bb_error_msg_and_die("can't store file '%s' "
Denys Vlasenkoa3aa3e32009-12-11 12:36:10 +0100425 "of size %"OFF_FMT"u, aborting",
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000426 fileName, statbuf->st_size);
427 }
Denis Vlasenko87cd4a82006-11-25 23:47:32 +0000428 header.typeflag = REGTYPE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000429 } else {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000430 bb_error_msg("%s: unknown file type", fileName);
431 return FALSE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000432 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000433
Denys Vlasenko931cf642017-11-13 01:40:28 +0100434# if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000435 /* Write out long name if needed */
436 /* (we, like GNU tar, output long linkname *before* long name) */
437 if (header.name[sizeof(header.name)-1])
438 writeLongname(tbInfo->tarFd, GNULONGNAME,
439 header_name, S_ISDIR(statbuf->st_mode));
Denys Vlasenko931cf642017-11-13 01:40:28 +0100440# endif
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000441
Erik Andersen5661fe02000-04-05 01:00:52 +0000442 /* Now write the header out to disk */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000443 chksum_and_xwrite(tbInfo->tarFd, &header);
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000444
Erik Andersen5661fe02000-04-05 01:00:52 +0000445 /* Now do the verbose thing (or not) */
Robert Grieblf2f26e72002-07-23 22:05:47 +0000446 if (tbInfo->verboseFlag) {
Eric Andersenfdd51032000-08-02 18:48:26 +0000447 FILE *vbFd = stdout;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000448
Denis Vlasenkoab6b4462008-12-12 02:14:35 +0000449 /* If archive goes to stdout, verbose goes to stderr */
450 if (tbInfo->tarFd == STDOUT_FILENO)
Eric Andersenfdd51032000-08-02 18:48:26 +0000451 vbFd = stderr;
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000452 /* GNU "tar cvvf" prints "extended" listing a-la "ls -l" */
453 /* We don't have such excesses here: for us "v" == "vv" */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000454 /* '/' is probably a GNUism */
455 fprintf(vbFd, "%s%s\n", header_name,
456 S_ISDIR(statbuf->st_mode) ? "/" : "");
Eric Andersenfdd51032000-08-02 18:48:26 +0000457 }
Erik Andersen3364d782000-03-28 00:58:14 +0000458
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000459 return TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +0000460}
461
Denys Vlasenko931cf642017-11-13 01:40:28 +0100462# if ENABLE_FEATURE_TAR_FROM
Rob Landley88621d72006-08-29 19:41:06 +0000463static int exclude_file(const llist_t *excluded_files, const char *file)
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000464{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000465 while (excluded_files) {
466 if (excluded_files->data[0] == '/') {
467 if (fnmatch(excluded_files->data, file,
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100468 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000469 return 1;
470 } else {
471 const char *p;
472
473 for (p = file; p[0] != '\0'; p++) {
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100474 if ((p == file || p[-1] == '/')
475 && p[0] != '/'
476 && fnmatch(excluded_files->data, p,
477 FNM_PATHNAME | FNM_LEADING_DIR) == 0
478 ) {
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000479 return 1;
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100480 }
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000481 }
482 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000483 excluded_files = excluded_files->link;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000484 }
485
486 return 0;
487}
Denys Vlasenko931cf642017-11-13 01:40:28 +0100488# else
489# define exclude_file(excluded_files, file) 0
490# endif
Erik Andersen3364d782000-03-28 00:58:14 +0000491
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +0000492static int FAST_FUNC writeFileToTarball(const char *fileName, struct stat *statbuf,
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000493 void *userData, int depth UNUSED_PARAM)
Erik Andersen3364d782000-03-28 00:58:14 +0000494{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000495 struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
Matt Kraaie80a2632000-12-19 20:45:49 +0000496 const char *header_name;
Rob Landleye5695532006-01-09 03:07:44 +0000497 int inputFileFd = -1;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000498
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100499 DBG("writeFileToTarball('%s')", fileName);
500
Denys Vlasenkob80acf52011-03-02 01:21:02 +0100501 /* Strip leading '/' and such (must be before memorizing hardlink's name) */
502 header_name = strip_unsafe_prefix(fileName);
Matt Kraaia1f97752000-12-19 06:24:08 +0000503
Denis Vlasenko86e0a222007-09-24 19:07:57 +0000504 if (header_name[0] == '\0')
505 return TRUE;
506
Denis Vlasenkoe9b33212007-09-24 19:32:53 +0000507 /* It is against the rules to archive a socket */
508 if (S_ISSOCK(statbuf->st_mode)) {
509 bb_error_msg("%s: socket ignored", fileName);
510 return TRUE;
511 }
512
Denis Vlasenko86e0a222007-09-24 19:07:57 +0000513 /*
514 * Check to see if we are dealing with a hard link.
515 * If so -
Denys Vlasenko10ad6222017-04-17 16:13:32 +0200516 * Treat the first occurrence of a given dev/inode as a file while
517 * treating any additional occurrences as hard links. This is done
Denis Vlasenko86e0a222007-09-24 19:07:57 +0000518 * by adding the file information to the HardLinkInfo linked list.
519 */
520 tbInfo->hlInfo = NULL;
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100521 if (!S_ISDIR(statbuf->st_mode) && statbuf->st_nlink > 1) {
522 DBG("'%s': st_nlink > 1", header_name);
Denys Vlasenkod43d6282009-11-29 16:28:33 +0100523 tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100524 if (tbInfo->hlInfo == NULL) {
525 DBG("'%s': addHardLinkInfo", header_name);
Denis Vlasenko86e0a222007-09-24 19:07:57 +0000526 addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, header_name);
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100527 }
Denis Vlasenko86e0a222007-09-24 19:07:57 +0000528 }
529
Denis Vlasenko86e0a222007-09-24 19:07:57 +0000530 /* It is a bad idea to store the archive we are in the process of creating,
531 * so check the device and inode to be sure that this particular file isn't
532 * the new tarball */
Denys Vlasenkof94c9bf2009-11-29 07:45:33 +0100533 if (tbInfo->tarFileStatBuf.st_dev == statbuf->st_dev
534 && tbInfo->tarFileStatBuf.st_ino == statbuf->st_ino
Denis Vlasenko86e0a222007-09-24 19:07:57 +0000535 ) {
536 bb_error_msg("%s: file is the archive; skipping", fileName);
537 return TRUE;
538 }
539
540 if (exclude_file(tbInfo->excludeList, header_name))
541 return SKIP;
542
Denys Vlasenko931cf642017-11-13 01:40:28 +0100543# if !ENABLE_FEATURE_TAR_GNU_EXTENSIONS
Denis Vlasenko86e0a222007-09-24 19:07:57 +0000544 if (strlen(header_name) >= NAME_SIZE) {
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000545 bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000546 return TRUE;
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000547 }
Denys Vlasenko931cf642017-11-13 01:40:28 +0100548# endif
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000549
Rob Landleye5695532006-01-09 03:07:44 +0000550 /* Is this a regular file? */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000551 if (tbInfo->hlInfo == NULL && S_ISREG(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000552 /* open the file we want to archive, and make sure all is well */
Denis Vlasenko50f7f442007-04-11 23:20:53 +0000553 inputFileFd = open_or_warn(fileName, O_RDONLY);
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000554 if (inputFileFd < 0) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000555 return FALSE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000556 }
Rob Landleye5695532006-01-09 03:07:44 +0000557 }
558
559 /* Add an entry to the tarball */
560 if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000561 return FALSE;
Rob Landleye5695532006-01-09 03:07:44 +0000562 }
563
564 /* If it was a regular file, write out the body */
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000565 if (inputFileFd >= 0) {
Denis Vlasenko714701c2006-12-22 00:21:07 +0000566 size_t readSize;
Denis Vlasenko50f7f442007-04-11 23:20:53 +0000567 /* Write the file to the archive. */
Denis Vlasenko714701c2006-12-22 00:21:07 +0000568 /* We record size into header first, */
569 /* and then write out file. If file shrinks in between, */
570 /* tar will be corrupted. So we don't allow for that. */
571 /* NB: GNU tar 1.16 warns and pads with zeroes */
572 /* or even seeks back and updates header */
573 bb_copyfd_exact_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
574 ////off_t readSize;
575 ////readSize = bb_copyfd_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
576 ////if (readSize != statbuf->st_size && readSize >= 0) {
577 //// bb_error_msg_and_die("short read from %s, aborting", fileName);
578 ////}
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000579
Denis Vlasenko4fbb5842006-11-24 14:55:23 +0000580 /* Check that file did not grow in between? */
Denis Vlasenko714701c2006-12-22 00:21:07 +0000581 /* if (safe_read(inputFileFd, 1) == 1) warn but continue? */
582
Rob Landleye5695532006-01-09 03:07:44 +0000583 close(inputFileFd);
Glenn L McGrath7ffe1332003-11-21 22:24:57 +0000584
Erik Andersen5661fe02000-04-05 01:00:52 +0000585 /* Pad the file up to the tar block size */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000586 /* (a few tricks here in the name of code size) */
Denis Vlasenko714701c2006-12-22 00:21:07 +0000587 readSize = (-(int)statbuf->st_size) & (TAR_BLOCK_SIZE-1);
Denis Vlasenko74324c82007-06-04 10:16:52 +0000588 memset(block_buf, 0, readSize);
589 xwrite(tbInfo->tarFd, block_buf, readSize);
Erik Andersen5661fe02000-04-05 01:00:52 +0000590 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000591
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000592 return TRUE;
Erik Andersen6acaa402000-03-26 14:03:20 +0000593}
594
Denys Vlasenko931cf642017-11-13 01:40:28 +0100595# if SEAMLESS_COMPRESSION
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000596/* Don't inline: vfork scares gcc and pessimizes code */
Denys Vlasenkoacb8be72014-12-11 15:33:07 +0100597static void NOINLINE vfork_compressor(int tar_fd, const char *gzip)
Erik Andersen6acaa402000-03-26 14:03:20 +0000598{
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000599 pid_t gzipPid;
Denys Vlasenkoacb8be72014-12-11 15:33:07 +0100600
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000601 // On Linux, vfork never unpauses parent early, although standard
602 // allows for that. Do we want to waste bytes checking for it?
Denys Vlasenko931cf642017-11-13 01:40:28 +0100603# define WAIT_FOR_CHILD 0
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000604 volatile int vfork_exec_errno = 0;
605 struct fd_pair gzipDataPipe;
Denys Vlasenko931cf642017-11-13 01:40:28 +0100606# if WAIT_FOR_CHILD
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000607 struct fd_pair gzipStatusPipe;
608 xpiped_pair(gzipStatusPipe);
Denys Vlasenko931cf642017-11-13 01:40:28 +0100609# endif
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000610 xpiped_pair(gzipDataPipe);
611
612 signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
613
Pascal Bellard926031b2010-07-04 15:32:38 +0200614 gzipPid = xvfork();
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000615
616 if (gzipPid == 0) {
617 /* child */
618 /* NB: close _first_, then move fds! */
619 close(gzipDataPipe.wr);
Denys Vlasenko931cf642017-11-13 01:40:28 +0100620# if WAIT_FOR_CHILD
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000621 close(gzipStatusPipe.rd);
622 /* gzipStatusPipe.wr will close only on exec -
623 * parent waits for this close to happen */
624 fcntl(gzipStatusPipe.wr, F_SETFD, FD_CLOEXEC);
Denys Vlasenko931cf642017-11-13 01:40:28 +0100625# endif
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000626 xmove_fd(gzipDataPipe.rd, 0);
627 xmove_fd(tar_fd, 1);
628 /* exec gzip/bzip2 program/applet */
Denys Vlasenkoacb8be72014-12-11 15:33:07 +0100629 BB_EXECLP(gzip, gzip, "-f", (char *)0);
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000630 vfork_exec_errno = errno;
Bernhard Reutner-Fischer636a1f82008-05-19 09:29:47 +0000631 _exit(EXIT_FAILURE);
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000632 }
633
634 /* parent */
635 xmove_fd(gzipDataPipe.wr, tar_fd);
636 close(gzipDataPipe.rd);
Denys Vlasenko931cf642017-11-13 01:40:28 +0100637# if WAIT_FOR_CHILD
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000638 close(gzipStatusPipe.wr);
639 while (1) {
640 char buf;
641 int n;
642
643 /* Wait until child execs (or fails to) */
644 n = full_read(gzipStatusPipe.rd, &buf, 1);
645 if (n < 0 /* && errno == EAGAIN */)
646 continue; /* try it again */
647 }
648 close(gzipStatusPipe.rd);
Denys Vlasenko931cf642017-11-13 01:40:28 +0100649# endif
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000650 if (vfork_exec_errno) {
651 errno = vfork_exec_errno;
Denys Vlasenkoacb8be72014-12-11 15:33:07 +0100652 bb_perror_msg_and_die("can't execute '%s'", gzip);
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000653 }
654}
Denys Vlasenko931cf642017-11-13 01:40:28 +0100655# endif /* SEAMLESS_COMPRESSION */
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000656
657
Denys Vlasenko931cf642017-11-13 01:40:28 +0100658# if !SEAMLESS_COMPRESSION
Denys Vlasenkoacb8be72014-12-11 15:33:07 +0100659/* Do not pass gzip flag to writeTarFile() */
Denys Vlasenko931cf642017-11-13 01:40:28 +0100660#define writeTarFile(tbInfo, recurseFlags, filelist, gzip) \
661 writeTarFile(tbInfo, recurseFlags, filelist)
662# endif
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000663/* gcc 4.2.1 inlines it, making code bigger */
Denys Vlasenko931cf642017-11-13 01:40:28 +0100664static NOINLINE int writeTarFile(
665 struct TarBallInfo *tbInfo,
666 int recurseFlags,
667 const llist_t *filelist,
668 const char *gzip)
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000669{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000670 int errorFlag = FALSE;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000671
Denys Vlasenko931cf642017-11-13 01:40:28 +0100672 /*tbInfo->hlInfoHead = NULL; - already is */
Robert Grieblf2f26e72002-07-23 22:05:47 +0000673
Erik Andersen68a9ea42000-04-04 18:39:50 +0000674 /* Store the stat info for the tarball's file, so
675 * can avoid including the tarball into itself.... */
Denys Vlasenko931cf642017-11-13 01:40:28 +0100676 xfstat(tbInfo->tarFd, &tbInfo->tarFileStatBuf, "can't stat tar file");
Erik Andersen6acaa402000-03-26 14:03:20 +0000677
Denys Vlasenko931cf642017-11-13 01:40:28 +0100678# if SEAMLESS_COMPRESSION
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000679 if (gzip)
Denys Vlasenko931cf642017-11-13 01:40:28 +0100680 vfork_compressor(tbInfo->tarFd, gzip);
681# endif
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000682
Erik Andersen6acaa402000-03-26 14:03:20 +0000683 /* Read the directory/files and iterate over them one at a time */
Denys Vlasenko931cf642017-11-13 01:40:28 +0100684 while (filelist) {
685 if (!recursive_action(filelist->data, recurseFlags,
686 writeFileToTarball, writeFileToTarball, tbInfo, 0)
Denys Vlasenkod43d6282009-11-29 16:28:33 +0100687 ) {
Erik Andersen68a9ea42000-04-04 18:39:50 +0000688 errorFlag = TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +0000689 }
Denys Vlasenko931cf642017-11-13 01:40:28 +0100690 filelist = filelist->link;
Erik Andersen6acaa402000-03-26 14:03:20 +0000691 }
Erik Andersen5661fe02000-04-05 01:00:52 +0000692 /* Write two empty blocks to the end of the archive */
Denis Vlasenko74324c82007-06-04 10:16:52 +0000693 memset(block_buf, 0, 2*TAR_BLOCK_SIZE);
Denys Vlasenko931cf642017-11-13 01:40:28 +0100694 xwrite(tbInfo->tarFd, block_buf, 2*TAR_BLOCK_SIZE);
Erik Andersen0817d132000-04-09 15:17:40 +0000695
696 /* To be pedantically correct, we would check if the tarball
Eric Andersen3c5ee9a2000-11-14 22:15:48 +0000697 * is smaller than 20 tar blocks, and pad it if it was smaller,
Erik Andersen0817d132000-04-09 15:17:40 +0000698 * but that isn't necessary for GNU tar interoperability, and
699 * so is considered a waste of space */
700
Rob Landley1a781032005-12-16 21:33:10 +0000701 /* Close so the child process (if any) will exit */
Denys Vlasenko931cf642017-11-13 01:40:28 +0100702 close(tbInfo->tarFd);
Rob Landley1a781032005-12-16 21:33:10 +0000703
Erik Andersen68a9ea42000-04-04 18:39:50 +0000704 /* Hang up the tools, close up shop, head home */
Rob Landley1a781032005-12-16 21:33:10 +0000705 if (ENABLE_FEATURE_CLEAN_UP)
Denys Vlasenko931cf642017-11-13 01:40:28 +0100706 freeHardLinkInfo(&tbInfo->hlInfoHead);
Rob Landley60fe7bf2005-10-16 03:54:49 +0000707
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000708 if (errorFlag)
Denis Vlasenkoe1a0d482006-10-20 13:28:22 +0000709 bb_error_msg("error exit delayed from previous errors");
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000710
Denys Vlasenko931cf642017-11-13 01:40:28 +0100711# if SEAMLESS_COMPRESSION
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000712 if (gzip) {
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000713 int status;
Denis Vlasenko5a07a1d2008-04-21 21:56:07 +0000714 if (safe_waitpid(-1, &status, 0) == -1)
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000715 bb_perror_msg("waitpid");
716 else if (!WIFEXITED(status) || WEXITSTATUS(status))
717 /* gzip was killed or has exited with nonzero! */
718 errorFlag = TRUE;
719 }
Denys Vlasenko931cf642017-11-13 01:40:28 +0100720# endif
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000721 return errorFlag;
Erik Andersen6acaa402000-03-26 14:03:20 +0000722}
Denys Vlasenko931cf642017-11-13 01:40:28 +0100723
Denys Vlasenko11775ed2014-12-22 19:37:05 +0100724#else /* !FEATURE_TAR_CREATE */
Denys Vlasenko931cf642017-11-13 01:40:28 +0100725
Denys Vlasenko11775ed2014-12-22 19:37:05 +0100726# define writeTarFile(...) 0
Denys Vlasenko931cf642017-11-13 01:40:28 +0100727
Denys Vlasenko11775ed2014-12-22 19:37:05 +0100728#endif
Erik Andersen6acaa402000-03-26 14:03:20 +0000729
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000730#if ENABLE_FEATURE_TAR_FROM
Eric Andersen27cb6842003-06-26 09:07:59 +0000731static llist_t *append_file_list_to_list(llist_t *list)
Glenn L McGrathd642a672001-10-13 06:54:45 +0000732{
Eric Andersen27cb6842003-06-26 09:07:59 +0000733 llist_t *newlist = NULL;
734
Denis Vlasenkod50dda82008-06-15 05:40:56 +0000735 while (list) {
Denys Vlasenko931cf642017-11-13 01:40:28 +0100736 FILE *src_stream;
737 char *line;
738
Denys Vlasenko3237f5c2011-02-03 04:00:23 +0100739 src_stream = xfopen_stdin(llist_pop(&list));
Denis Vlasenko8ee649a2008-03-26 20:04:27 +0000740 while ((line = xmalloc_fgetline(src_stream)) != NULL) {
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000741 /* kill trailing '/' unless the string is just "/" */
742 char *cp = last_char_is(line, '/');
743 if (cp > line)
744 *cp = '\0';
SASAKI Suguru73fbe9d2013-08-15 12:19:29 +0200745 llist_add_to_end(&newlist, line);
Denis Vlasenko314908d2006-09-03 14:04:33 +0000746 }
Rob Landley60fe7bf2005-10-16 03:54:49 +0000747 fclose(src_stream);
Eric Andersen27cb6842003-06-26 09:07:59 +0000748 }
749 return newlist;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000750}
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000751#endif
Erik Andersen6acaa402000-03-26 14:03:20 +0000752
Denys Vlasenko52827e32010-06-26 18:21:36 +0200753//usage:#define tar_trivial_usage
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100754//usage: IF_FEATURE_TAR_CREATE("c|") "x|t [-"
Denys Vlasenkob5233f82011-01-31 05:35:23 +0100755//usage: IF_FEATURE_SEAMLESS_Z("Z")
756//usage: IF_FEATURE_SEAMLESS_GZ("z")
Boris Reisigdfc24732012-05-24 09:01:55 +0200757//usage: IF_FEATURE_SEAMLESS_XZ("J")
Denys Vlasenkob5233f82011-01-31 05:35:23 +0100758//usage: IF_FEATURE_SEAMLESS_BZ2("j")
759//usage: IF_FEATURE_SEAMLESS_LZMA("a")
760//usage: IF_FEATURE_TAR_CREATE("h")
761//usage: IF_FEATURE_TAR_NOPRESERVE_TIME("m")
Denys Vlasenko3c084372018-03-16 04:02:23 +0100762//usage: "vokO] "
Denys Vlasenko02e93b32017-11-10 22:14:22 +0100763//usage: "[-f TARFILE] [-C DIR] "
Denys Vlasenko931cf642017-11-13 01:40:28 +0100764//usage: IF_FEATURE_TAR_FROM("[-T FILE] [-X FILE] "IF_FEATURE_TAR_LONG_OPTIONS("[--exclude PATTERN]... "))
Denys Vlasenko02e93b32017-11-10 22:14:22 +0100765//usage: "[FILE]..."
Denys Vlasenko52827e32010-06-26 18:21:36 +0200766//usage:#define tar_full_usage "\n\n"
767//usage: IF_FEATURE_TAR_CREATE("Create, extract, ")
768//usage: IF_NOT_FEATURE_TAR_CREATE("Extract ")
769//usage: "or list files from a tar file\n"
770//usage: "\nOperation:"
771//usage: IF_FEATURE_TAR_CREATE(
772//usage: "\n c Create"
773//usage: )
774//usage: "\n x Extract"
775//usage: "\n t List"
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100776//usage: "\n -f FILE Name of TARFILE ('-' for stdin/out)"
777//usage: "\n -C DIR Change to DIR before operation"
778//usage: "\n -v Verbose"
Denys Vlasenko3c084372018-03-16 04:02:23 +0100779//usage: "\n -O Extract to stdout"
780//usage: IF_FEATURE_TAR_NOPRESERVE_TIME(
781//usage: "\n -m Don't restore mtime"
782//usage: )
Denys Vlasenko1ee222e2018-03-16 03:55:14 +0100783//usage: "\n -o Don't restore user:group"
784///////:-p - accepted but ignored, restores mode (aliases in GNU tar: --preserve-permissions, --same-permissions)
785//usage: "\n -k Don't replace existing files"
Denys Vlasenkob5233f82011-01-31 05:35:23 +0100786//usage: IF_FEATURE_SEAMLESS_Z(
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100787//usage: "\n -Z (De)compress using compress"
Denys Vlasenkob5233f82011-01-31 05:35:23 +0100788//usage: )
Denys Vlasenko52827e32010-06-26 18:21:36 +0200789//usage: IF_FEATURE_SEAMLESS_GZ(
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100790//usage: "\n -z (De)compress using gzip"
Denys Vlasenko52827e32010-06-26 18:21:36 +0200791//usage: )
Boris Reisigdfc24732012-05-24 09:01:55 +0200792//usage: IF_FEATURE_SEAMLESS_XZ(
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100793//usage: "\n -J (De)compress using xz"
Boris Reisigdfc24732012-05-24 09:01:55 +0200794//usage: )
Denys Vlasenko52827e32010-06-26 18:21:36 +0200795//usage: IF_FEATURE_SEAMLESS_BZ2(
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100796//usage: "\n -j (De)compress using bzip2"
Denys Vlasenko52827e32010-06-26 18:21:36 +0200797//usage: )
798//usage: IF_FEATURE_SEAMLESS_LZMA(
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100799//usage: "\n -a (De)compress using lzma"
Denys Vlasenko52827e32010-06-26 18:21:36 +0200800//usage: )
Denys Vlasenko52827e32010-06-26 18:21:36 +0200801//usage: IF_FEATURE_TAR_CREATE(
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100802//usage: "\n -h Follow symlinks"
Denys Vlasenko52827e32010-06-26 18:21:36 +0200803//usage: )
Denys Vlasenko52827e32010-06-26 18:21:36 +0200804//usage: IF_FEATURE_TAR_FROM(
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100805//usage: "\n -T FILE File with names to include"
806//usage: "\n -X FILE File with glob patterns to exclude"
Denys Vlasenko52827e32010-06-26 18:21:36 +0200807//usage: IF_FEATURE_TAR_LONG_OPTIONS(
Denys Vlasenko02e93b32017-11-10 22:14:22 +0100808//usage: "\n --exclude PATTERN Glob pattern to exclude"
Denys Vlasenko52827e32010-06-26 18:21:36 +0200809//usage: )
Denys Vlasenko52827e32010-06-26 18:21:36 +0200810//usage: )
811//usage:
812//usage:#define tar_example_usage
813//usage: "$ zcat /tmp/tarball.tar.gz | tar -xf -\n"
814//usage: "$ tar -cf /tmp/tarball.tar /usr/local\n"
815
816// Supported but aren't in --help:
Natanael Copa04461042012-04-24 17:06:19 +0200817// no-recursion
Denys Vlasenko52827e32010-06-26 18:21:36 +0200818// numeric-owner
819// no-same-permissions
820// overwrite
821//IF_FEATURE_TAR_TO_COMMAND(
822// to-command
823//)
824
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000825enum {
Bernhard Reutner-Fischer30f3c1d2009-10-25 02:13:32 +0200826 OPTBIT_KEEP_OLD = 8,
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000827 IF_FEATURE_TAR_CREATE( OPTBIT_CREATE ,)
828 IF_FEATURE_TAR_CREATE( OPTBIT_DEREFERENCE ,)
829 IF_FEATURE_SEAMLESS_BZ2( OPTBIT_BZIP2 ,)
830 IF_FEATURE_SEAMLESS_LZMA(OPTBIT_LZMA ,)
831 IF_FEATURE_TAR_FROM( OPTBIT_INCLUDE_FROM,)
832 IF_FEATURE_TAR_FROM( OPTBIT_EXCLUDE_FROM,)
833 IF_FEATURE_SEAMLESS_GZ( OPTBIT_GZIP ,)
Boris Reisigdfc24732012-05-24 09:01:55 +0200834 IF_FEATURE_SEAMLESS_XZ( OPTBIT_XZ ,) // 16th bit
835 IF_FEATURE_SEAMLESS_Z( OPTBIT_COMPRESS ,)
Mikhail Gusarov0d478332010-01-19 20:22:30 +0600836 IF_FEATURE_TAR_NOPRESERVE_TIME(OPTBIT_NOPRESERVE_TIME,)
Denys Vlasenko425ad9c2009-12-16 22:46:01 +0100837#if ENABLE_FEATURE_TAR_LONG_OPTIONS
Denys Vlasenko6c563e32015-10-22 01:07:13 +0200838 OPTBIT_STRIP_COMPONENTS,
Natanael Copa04461042012-04-24 17:06:19 +0200839 OPTBIT_NORECURSION,
Ladislav Michl2b46fd42010-06-25 01:33:00 +0200840 IF_FEATURE_TAR_TO_COMMAND(OPTBIT_2COMMAND ,)
Denis Vlasenko8b814b42009-04-21 00:52:21 +0000841 OPTBIT_NUMERIC_OWNER,
Denys Vlasenkod57d6262009-09-17 02:43:14 +0200842 OPTBIT_NOPRESERVE_PERM,
Denys Vlasenko8a936cf2009-12-16 23:18:59 +0100843 OPTBIT_OVERWRITE,
Denys Vlasenko425ad9c2009-12-16 22:46:01 +0100844#endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000845 OPT_TEST = 1 << 0, // t
846 OPT_EXTRACT = 1 << 1, // x
847 OPT_BASEDIR = 1 << 2, // C
848 OPT_TARNAME = 1 << 3, // f
849 OPT_2STDOUT = 1 << 4, // O
Denys Vlasenko425ad9c2009-12-16 22:46:01 +0100850 OPT_NOPRESERVE_OWNER = 1 << 5, // o == no-same-owner
Bernhard Reutner-Fischer30f3c1d2009-10-25 02:13:32 +0200851 OPT_P = 1 << 6, // p
852 OPT_VERBOSE = 1 << 7, // v
853 OPT_KEEP_OLD = 1 << 8, // k
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000854 OPT_CREATE = IF_FEATURE_TAR_CREATE( (1 << OPTBIT_CREATE )) + 0, // c
855 OPT_DEREFERENCE = IF_FEATURE_TAR_CREATE( (1 << OPTBIT_DEREFERENCE )) + 0, // h
856 OPT_BZIP2 = IF_FEATURE_SEAMLESS_BZ2( (1 << OPTBIT_BZIP2 )) + 0, // j
857 OPT_LZMA = IF_FEATURE_SEAMLESS_LZMA((1 << OPTBIT_LZMA )) + 0, // a
858 OPT_INCLUDE_FROM = IF_FEATURE_TAR_FROM( (1 << OPTBIT_INCLUDE_FROM)) + 0, // T
859 OPT_EXCLUDE_FROM = IF_FEATURE_TAR_FROM( (1 << OPTBIT_EXCLUDE_FROM)) + 0, // X
860 OPT_GZIP = IF_FEATURE_SEAMLESS_GZ( (1 << OPTBIT_GZIP )) + 0, // z
Boris Reisigdfc24732012-05-24 09:01:55 +0200861 OPT_XZ = IF_FEATURE_SEAMLESS_XZ( (1 << OPTBIT_XZ )) + 0, // J
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000862 OPT_COMPRESS = IF_FEATURE_SEAMLESS_Z( (1 << OPTBIT_COMPRESS )) + 0, // Z
Denys Vlasenko6c563e32015-10-22 01:07:13 +0200863 OPT_NOPRESERVE_TIME = IF_FEATURE_TAR_NOPRESERVE_TIME((1 << OPTBIT_NOPRESERVE_TIME)) + 0, // m
864 OPT_STRIP_COMPONENTS = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_STRIP_COMPONENTS)) + 0, // strip-components
865 OPT_NORECURSION = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NORECURSION )) + 0, // no-recursion
866 OPT_2COMMAND = IF_FEATURE_TAR_TO_COMMAND( (1 << OPTBIT_2COMMAND )) + 0, // to-command
867 OPT_NUMERIC_OWNER = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NUMERIC_OWNER )) + 0, // numeric-owner
868 OPT_NOPRESERVE_PERM = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NOPRESERVE_PERM)) + 0, // no-same-permissions
869 OPT_OVERWRITE = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_OVERWRITE )) + 0, // overwrite
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +0100870
Boris Reisigdfc24732012-05-24 09:01:55 +0200871 OPT_ANY_COMPRESS = (OPT_BZIP2 | OPT_LZMA | OPT_GZIP | OPT_XZ | OPT_COMPRESS),
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000872};
873#if ENABLE_FEATURE_TAR_LONG_OPTIONS
Denis Vlasenko6ca409e2007-08-12 20:58:27 +0000874static const char tar_longopts[] ALIGN1 =
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000875 "list\0" No_argument "t"
876 "extract\0" No_argument "x"
877 "directory\0" Required_argument "C"
878 "file\0" Required_argument "f"
879 "to-stdout\0" No_argument "O"
Bernhard Reutner-Fischer30f3c1d2009-10-25 02:13:32 +0200880 /* do not restore owner */
881 /* Note: GNU tar handles 'o' as no-same-owner only on extract,
882 * on create, 'o' is --old-archive. We do not support --old-archive. */
883 "no-same-owner\0" No_argument "o"
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000884 "same-permissions\0" No_argument "p"
885 "verbose\0" No_argument "v"
886 "keep-old\0" No_argument "k"
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000887# if ENABLE_FEATURE_TAR_CREATE
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000888 "create\0" No_argument "c"
889 "dereference\0" No_argument "h"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000890# endif
Denis Vlasenkoe9ad84d2008-08-05 13:10:34 +0000891# if ENABLE_FEATURE_SEAMLESS_BZ2
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000892 "bzip2\0" No_argument "j"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000893# endif
Denis Vlasenkoe9ad84d2008-08-05 13:10:34 +0000894# if ENABLE_FEATURE_SEAMLESS_LZMA
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000895 "lzma\0" No_argument "a"
Rob Landleyc1d69902006-01-20 18:28:50 +0000896# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000897# if ENABLE_FEATURE_TAR_FROM
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000898 "files-from\0" Required_argument "T"
899 "exclude-from\0" Required_argument "X"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000900# endif
Denis Vlasenkoe9ad84d2008-08-05 13:10:34 +0000901# if ENABLE_FEATURE_SEAMLESS_GZ
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000902 "gzip\0" No_argument "z"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000903# endif
Boris Reisigdfc24732012-05-24 09:01:55 +0200904# if ENABLE_FEATURE_SEAMLESS_XZ
905 "xz\0" No_argument "J"
906# endif
Denis Vlasenkoe9ad84d2008-08-05 13:10:34 +0000907# if ENABLE_FEATURE_SEAMLESS_Z
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000908 "compress\0" No_argument "Z"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000909# endif
Mikhail Gusarov0d478332010-01-19 20:22:30 +0600910# if ENABLE_FEATURE_TAR_NOPRESERVE_TIME
911 "touch\0" No_argument "m"
912# endif
Denys Vlasenko6c563e32015-10-22 01:07:13 +0200913 "strip-components\0" Required_argument "\xf9"
Natanael Copa04461042012-04-24 17:06:19 +0200914 "no-recursion\0" No_argument "\xfa"
Ladislav Michl2b46fd42010-06-25 01:33:00 +0200915# if ENABLE_FEATURE_TAR_TO_COMMAND
916 "to-command\0" Required_argument "\xfb"
917# endif
Denys Vlasenkod57d6262009-09-17 02:43:14 +0200918 /* use numeric uid/gid from tar header, not textual */
Denys Vlasenko8a936cf2009-12-16 23:18:59 +0100919 "numeric-owner\0" No_argument "\xfc"
Denys Vlasenkod57d6262009-09-17 02:43:14 +0200920 /* do not restore mode */
Denys Vlasenko8a936cf2009-12-16 23:18:59 +0100921 "no-same-permissions\0" No_argument "\xfd"
922 /* on unpack, open with O_TRUNC and !O_EXCL */
923 "overwrite\0" No_argument "\xfe"
Denis Vlasenko30d7a342006-11-27 20:24:40 +0000924 /* --exclude takes next bit position in option mask, */
Denys Vlasenko425ad9c2009-12-16 22:46:01 +0100925 /* therefore we have to put it _after_ --no-same-permissions */
Denis Vlasenko30d7a342006-11-27 20:24:40 +0000926# if ENABLE_FEATURE_TAR_FROM
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000927 "exclude\0" Required_argument "\xff"
Denis Vlasenko30d7a342006-11-27 20:24:40 +0000928# endif
Denis Vlasenko990d0f62007-07-24 15:54:42 +0000929 ;
Denys Vlasenko036585a2017-08-08 16:38:18 +0200930# define GETOPT32 getopt32long
931# define LONGOPTS ,tar_longopts
932#else
933# define GETOPT32 getopt32
934# define LONGOPTS
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000935#endif
Glenn L McGrathec87d372002-11-27 07:52:22 +0000936
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +0000937int tar_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000938int tar_main(int argc UNUSED_PARAM, char **argv)
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000939{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000940 archive_handle_t *tar_handle;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000941 char *base_dir = NULL;
Glenn L McGrathf66de642002-11-25 23:57:27 +0000942 const char *tar_filename = "-";
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000943 unsigned opt;
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000944 int verboseFlag = 0;
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000945#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
"Vladimir N. Oleynik"84e75112005-10-15 06:32:38 +0000946 llist_t *excludes = NULL;
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000947#endif
Denys Vlasenko9de2e5a2016-04-21 18:38:51 +0200948 INIT_G();
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000949
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000950 /* Initialise default values */
951 tar_handle = init_handle();
Denis Vlasenkoa60936d2008-06-28 05:04:09 +0000952 tar_handle->ah_flags = ARCHIVE_CREATE_LEADING_DIRS
Denys Vlasenkod57d6262009-09-17 02:43:14 +0200953 | ARCHIVE_RESTORE_DATE
954 | ARCHIVE_UNLINK_OLD;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000955
Denis Vlasenko73d702e2008-10-25 09:27:35 +0000956 /* Apparently only root's tar preserves perms (see bug 3844) */
Denis Vlasenkoebad0292008-10-24 23:47:38 +0000957 if (getuid() != 0)
Denys Vlasenkod57d6262009-09-17 02:43:14 +0200958 tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_PERM;
Denis Vlasenkoebad0292008-10-24 23:47:38 +0000959
Denys Vlasenkof6450372009-10-25 01:32:45 +0200960#if ENABLE_DESKTOP
Denys Vlasenko62ae3232015-10-22 13:22:26 +0200961 /* Lie to buildroot when it starts asking stupid questions. */
962 if (argv[1] && strcmp(argv[1], "--version") == 0) {
963 // Output of 'tar --version' examples:
964 // tar (GNU tar) 1.15.1
965 // tar (GNU tar) 1.25
966 // bsdtar 2.8.3 - libarchive 2.8.3
967 puts("tar (busybox) " BB_VER);
968 return 0;
969 }
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100970#endif
971 if (argv[1] && argv[1][0] != '-' && argv[1][0] != '\0') {
Denys Vlasenkof6450372009-10-25 01:32:45 +0200972 /* Compat:
973 * 1st argument without dash handles options with parameters
974 * differently from dashed one: it takes *next argv[i]*
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100975 * as parameter even if there are more chars in 1st argument:
Denys Vlasenkof6450372009-10-25 01:32:45 +0200976 * "tar fx TARFILE" - "x" is not taken as f's param
977 * but is interpreted as -x option
978 * "tar -xf TARFILE" - dashed equivalent of the above
979 * "tar -fx ..." - "x" is taken as f's param
980 * getopt32 wouldn't handle 1st command correctly.
981 * Unfortunately, people do use such commands.
982 * We massage argv[1] to work around it by moving 'f'
983 * to the end of the string.
984 * More contrived "tar fCx TARFILE DIR" still fails,
985 * but such commands are much less likely to be used.
986 */
987 char *f = strchr(argv[1], 'f');
988 if (f) {
989 while (f[1] != '\0') {
990 *f = f[1];
991 f++;
992 }
993 *f = 'f';
994 }
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100995 /* Prepend '-' to the first argument */
Ron Yorston6bafcfb2017-08-22 16:33:06 +0100996 argv[1] = xasprintf("-%s", argv[1]);
Denys Vlasenkoa07fead2017-11-13 01:56:51 +0100997 }
Denys Vlasenko22542ec2017-08-08 21:55:02 +0200998 opt = GETOPT32(argv, "^"
Bernhard Reutner-Fischer30f3c1d2009-10-25 02:13:32 +0200999 "txC:f:Oopvk"
Denys Vlasenko237bedd2016-07-06 21:58:02 +02001000 IF_FEATURE_TAR_CREATE( "ch" )
1001 IF_FEATURE_SEAMLESS_BZ2( "j" )
1002 IF_FEATURE_SEAMLESS_LZMA("a" )
1003 IF_FEATURE_TAR_FROM( "T:*X:*")
1004 IF_FEATURE_SEAMLESS_GZ( "z" )
1005 IF_FEATURE_SEAMLESS_XZ( "J" )
1006 IF_FEATURE_SEAMLESS_Z( "Z" )
Mikhail Gusarov0d478332010-01-19 20:22:30 +06001007 IF_FEATURE_TAR_NOPRESERVE_TIME("m")
Denys Vlasenko6c563e32015-10-22 01:07:13 +02001008 IF_FEATURE_TAR_LONG_OPTIONS("\xf9:") // --strip-components
Denys Vlasenko22542ec2017-08-08 21:55:02 +02001009 "\0"
1010 "tt:vv:" // count -t,-v
1011#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
1012 "\xff::" // --exclude=PATTERN is a list
1013#endif
1014 IF_FEATURE_TAR_CREATE("c:") "t:x:" // at least one of these is reqd
1015 IF_FEATURE_TAR_CREATE("c--tx:t--cx:x--ct") // mutually exclusive
1016 IF_NOT_FEATURE_TAR_CREATE("t--x:x--t") // mutually exclusive
1017#if ENABLE_FEATURE_TAR_LONG_OPTIONS
1018 ":\xf9+" // --strip-components=NUM
1019#endif
Denys Vlasenko036585a2017-08-08 16:38:18 +02001020 LONGOPTS
Denis Vlasenko8c0164c2007-02-04 21:30:35 +00001021 , &base_dir // -C dir
1022 , &tar_filename // -f filename
Denis Vlasenko5e34ff22009-04-21 11:09:40 +00001023 IF_FEATURE_TAR_FROM(, &(tar_handle->accept)) // T
1024 IF_FEATURE_TAR_FROM(, &(tar_handle->reject)) // X
Denys Vlasenko6c563e32015-10-22 01:07:13 +02001025#if ENABLE_FEATURE_TAR_LONG_OPTIONS
1026 , &tar_handle->tar__strip_components // --strip-components
1027#endif
Ladislav Michl2b46fd42010-06-25 01:33:00 +02001028 IF_FEATURE_TAR_TO_COMMAND(, &(tar_handle->tar__to_command)) // --to-command
Denis Vlasenko8c0164c2007-02-04 21:30:35 +00001029#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
1030 , &excludes // --exclude
1031#endif
1032 , &verboseFlag // combined count for -t and -v
1033 , &verboseFlag // combined count for -t and -v
Denis Vlasenkod031ffa2006-11-24 21:54:44 +00001034 );
Denys Vlasenko6c563e32015-10-22 01:07:13 +02001035#if DBG_OPTION_PARSING
1036 bb_error_msg("opt: 0x%08x", opt);
1037# define showopt(o) bb_error_msg("opt & %s(%x): %x", #o, o, opt & o);
1038 showopt(OPT_TEST );
1039 showopt(OPT_EXTRACT );
1040 showopt(OPT_BASEDIR );
1041 showopt(OPT_TARNAME );
1042 showopt(OPT_2STDOUT );
1043 showopt(OPT_NOPRESERVE_OWNER);
1044 showopt(OPT_P );
1045 showopt(OPT_VERBOSE );
1046 showopt(OPT_KEEP_OLD );
1047 showopt(OPT_CREATE );
1048 showopt(OPT_DEREFERENCE );
1049 showopt(OPT_BZIP2 );
1050 showopt(OPT_LZMA );
1051 showopt(OPT_INCLUDE_FROM );
1052 showopt(OPT_EXCLUDE_FROM );
1053 showopt(OPT_GZIP );
1054 showopt(OPT_XZ );
1055 showopt(OPT_COMPRESS );
1056 showopt(OPT_NOPRESERVE_TIME );
1057 showopt(OPT_STRIP_COMPONENTS);
1058 showopt(OPT_NORECURSION );
1059 showopt(OPT_2COMMAND );
1060 showopt(OPT_NUMERIC_OWNER );
1061 showopt(OPT_NOPRESERVE_PERM );
1062 showopt(OPT_OVERWRITE );
1063 showopt(OPT_ANY_COMPRESS );
1064 bb_error_msg("base_dir:'%s'", base_dir);
1065 bb_error_msg("tar_filename:'%s'", tar_filename);
1066 bb_error_msg("verboseFlag:%d", verboseFlag);
1067 bb_error_msg("tar_handle->tar__to_command:'%s'", tar_handle->tar__to_command);
1068 bb_error_msg("tar_handle->tar__strip_components:%u", tar_handle->tar__strip_components);
1069 return 0;
1070# undef showopt
1071#endif
Denis Vlasenkoc4503792008-04-29 02:43:23 +00001072 argv += optind;
Rob Landley60fe7bf2005-10-16 03:54:49 +00001073
Denys Vlasenko6c563e32015-10-22 01:07:13 +02001074 if (verboseFlag)
1075 tar_handle->action_header = header_verbose_list;
1076 if (verboseFlag == 1)
1077 tar_handle->action_header = header_list;
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +00001078
Denis Vlasenkob5963352006-11-26 01:46:59 +00001079 if (opt & OPT_EXTRACT)
Rob Landley60fe7bf2005-10-16 03:54:49 +00001080 tar_handle->action_data = data_extract_all;
Tim Rikerc1ef7bd2006-01-25 00:08:53 +00001081
Denis Vlasenkod031ffa2006-11-24 21:54:44 +00001082 if (opt & OPT_2STDOUT)
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +00001083 tar_handle->action_data = data_extract_to_stdout;
Rob Landley60fe7bf2005-10-16 03:54:49 +00001084
Ladislav Michl2b46fd42010-06-25 01:33:00 +02001085 if (opt & OPT_2COMMAND) {
1086 putenv((char*)"TAR_FILETYPE=f");
1087 signal(SIGPIPE, SIG_IGN);
1088 tar_handle->action_data = data_extract_to_command;
Denys Vlasenko681efe22011-03-08 21:00:36 +01001089 IF_FEATURE_TAR_TO_COMMAND(tar_handle->tar__to_command_shell = xstrdup(get_shell_name());)
Ladislav Michl2b46fd42010-06-25 01:33:00 +02001090 }
1091
Denis Vlasenkod031ffa2006-11-24 21:54:44 +00001092 if (opt & OPT_KEEP_OLD)
Denys Vlasenkod57d6262009-09-17 02:43:14 +02001093 tar_handle->ah_flags &= ~ARCHIVE_UNLINK_OLD;
Rob Landley60fe7bf2005-10-16 03:54:49 +00001094
Denis Vlasenko8b814b42009-04-21 00:52:21 +00001095 if (opt & OPT_NUMERIC_OWNER)
1096 tar_handle->ah_flags |= ARCHIVE_NUMERIC_OWNER;
1097
Denys Vlasenkod57d6262009-09-17 02:43:14 +02001098 if (opt & OPT_NOPRESERVE_OWNER)
1099 tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_OWNER;
1100
1101 if (opt & OPT_NOPRESERVE_PERM)
1102 tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_PERM;
1103
Denys Vlasenko8a936cf2009-12-16 23:18:59 +01001104 if (opt & OPT_OVERWRITE) {
1105 tar_handle->ah_flags &= ~ARCHIVE_UNLINK_OLD;
1106 tar_handle->ah_flags |= ARCHIVE_O_TRUNC;
1107 }
1108
Mikhail Gusarov0d478332010-01-19 20:22:30 +06001109 if (opt & OPT_NOPRESERVE_TIME)
1110 tar_handle->ah_flags &= ~ARCHIVE_RESTORE_DATE;
Mikhail Gusarov0d478332010-01-19 20:22:30 +06001111
Denis Vlasenko8c0164c2007-02-04 21:30:35 +00001112#if ENABLE_FEATURE_TAR_FROM
1113 tar_handle->reject = append_file_list_to_list(tar_handle->reject);
Denys Vlasenko94ca6942010-01-20 02:51:09 +01001114# if ENABLE_FEATURE_TAR_LONG_OPTIONS
Denis Vlasenko8c0164c2007-02-04 21:30:35 +00001115 /* Append excludes to reject */
1116 while (excludes) {
1117 llist_t *next = excludes->link;
1118 excludes->link = tar_handle->reject;
1119 tar_handle->reject = excludes;
1120 excludes = next;
Glenn L McGrath56f16b42003-11-18 21:37:52 +00001121 }
Denys Vlasenko94ca6942010-01-20 02:51:09 +01001122# endif
Denis Vlasenko8c0164c2007-02-04 21:30:35 +00001123 tar_handle->accept = append_file_list_to_list(tar_handle->accept);
1124#endif
Glenn L McGrathce91c8a2003-12-26 14:01:37 +00001125
Glenn L McGrath2e772ed2001-10-05 02:58:48 +00001126 /* Setup an array of filenames to work with */
Denys Vlasenko94ca6942010-01-20 02:51:09 +01001127 /* TODO: This is the same as in ar, make a separate function? */
Denis Vlasenkoc4503792008-04-29 02:43:23 +00001128 while (*argv) {
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +00001129 /* kill trailing '/' unless the string is just "/" */
Denis Vlasenkoc4503792008-04-29 02:43:23 +00001130 char *cp = last_char_is(*argv, '/');
1131 if (cp > *argv)
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +00001132 *cp = '\0';
Denis Vlasenkoc4503792008-04-29 02:43:23 +00001133 llist_add_to_end(&tar_handle->accept, *argv);
1134 argv++;
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +00001135 }
Glenn L McGrath98f824a2002-10-19 00:46:35 +00001136
Denis Vlasenko376ce1e2006-11-24 14:51:01 +00001137 if (tar_handle->accept || tar_handle->reject)
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +00001138 tar_handle->filter = filter_accept_reject_list;
Glenn L McGratha0ee8812002-08-22 13:44:08 +00001139
Glenn L McGrath91b3d462003-10-02 14:33:23 +00001140 /* Open the tar file */
1141 {
Denys Vlasenkod43d6282009-11-29 16:28:33 +01001142 int tar_fd = STDIN_FILENO;
1143 int flags = O_RDONLY;
Glenn L McGrath91b3d462003-10-02 14:33:23 +00001144
Denis Vlasenkod031ffa2006-11-24 21:54:44 +00001145 if (opt & OPT_CREATE) {
Denys Vlasenko94ca6942010-01-20 02:51:09 +01001146 /* Make sure there is at least one file to tar up */
Rob Landley60fe7bf2005-10-16 03:54:49 +00001147 if (tar_handle->accept == NULL)
1148 bb_error_msg_and_die("empty archive");
1149
Denys Vlasenkod43d6282009-11-29 16:28:33 +01001150 tar_fd = STDOUT_FILENO;
Denis Vlasenko376ce1e2006-11-24 14:51:01 +00001151 /* Mimicking GNU tar 1.15.1: */
Denis Vlasenkoe9ad84d2008-08-05 13:10:34 +00001152 flags = O_WRONLY | O_CREAT | O_TRUNC;
Glenn L McGrath91b3d462003-10-02 14:33:23 +00001153 }
1154
Denis Vlasenko9f739442006-12-16 23:49:13 +00001155 if (LONE_DASH(tar_filename)) {
Denys Vlasenkod43d6282009-11-29 16:28:33 +01001156 tar_handle->src_fd = tar_fd;
Denis Vlasenko13858992006-10-08 12:49:22 +00001157 tar_handle->seek = seek_by_read;
Glenn L McGrath91b3d462003-10-02 14:33:23 +00001158 } else {
Denys Vlasenkoaef441c2011-02-06 20:01:11 +01001159 if (ENABLE_FEATURE_TAR_AUTODETECT
1160 && flags == O_RDONLY
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001161 && !(opt & OPT_ANY_COMPRESS)
Denys Vlasenkoaef441c2011-02-06 20:01:11 +01001162 ) {
Denys Vlasenko640ce3d2014-02-02 02:06:38 +01001163 tar_handle->src_fd = open_zipped(tar_filename, /*fail_if_not_compressed:*/ 0);
Denis Vlasenkoe9ad84d2008-08-05 13:10:34 +00001164 if (tar_handle->src_fd < 0)
1165 bb_perror_msg_and_die("can't open '%s'", tar_filename);
1166 } else {
1167 tar_handle->src_fd = xopen(tar_filename, flags);
1168 }
Glenn L McGrath91b3d462003-10-02 14:33:23 +00001169 }
1170 }
1171
Bernhard Reutner-Fischerd9cf7ac2006-04-12 18:39:58 +00001172 if (base_dir)
Rob Landley86b4d642006-08-03 17:58:17 +00001173 xchdir(base_dir);
Glenn L McGrath91b3d462003-10-02 14:33:23 +00001174
Denys Vlasenko015db582016-06-19 18:15:33 +02001175#if ENABLE_FEATURE_TAR_CREATE
Denys Vlasenko94ca6942010-01-20 02:51:09 +01001176 /* Create an archive */
Denis Vlasenkod031ffa2006-11-24 21:54:44 +00001177 if (opt & OPT_CREATE) {
Denys Vlasenko931cf642017-11-13 01:40:28 +01001178 struct TarBallInfo *tbInfo;
Denys Vlasenko015db582016-06-19 18:15:33 +02001179# if SEAMLESS_COMPRESSION
Denys Vlasenkoacb8be72014-12-11 15:33:07 +01001180 const char *zipMode = NULL;
1181 if (opt & OPT_COMPRESS)
1182 zipMode = "compress";
1183 if (opt & OPT_GZIP)
1184 zipMode = "gzip";
1185 if (opt & OPT_BZIP2)
1186 zipMode = "bzip2";
1187 if (opt & OPT_LZMA)
1188 zipMode = "lzma";
1189 if (opt & OPT_XZ)
1190 zipMode = "xz";
Denys Vlasenko015db582016-06-19 18:15:33 +02001191# endif
Denys Vlasenko931cf642017-11-13 01:40:28 +01001192 tbInfo = xzalloc(sizeof(*tbInfo));
1193 tbInfo->tarFd = tar_handle->src_fd;
1194 tbInfo->verboseFlag = verboseFlag;
1195# if ENABLE_FEATURE_TAR_FROM
1196 tbInfo->excludeList = tar_handle->reject;
1197# endif
Denis Vlasenkoc8889462006-12-17 19:08:20 +00001198 /* NB: writeTarFile() closes tar_handle->src_fd */
Denys Vlasenko931cf642017-11-13 01:40:28 +01001199 return writeTarFile(tbInfo,
Natanael Copa04461042012-04-24 17:06:19 +02001200 (opt & OPT_DEREFERENCE ? ACTION_FOLLOWLINKS : 0)
1201 | (opt & OPT_NORECURSION ? 0 : ACTION_RECURSE),
Bernhard Reutner-Fischer18260d52006-04-18 14:17:49 +00001202 tar_handle->accept,
Denys Vlasenko931cf642017-11-13 01:40:28 +01001203 zipMode);
Glenn L McGrath98f824a2002-10-19 00:46:35 +00001204 }
Denys Vlasenko015db582016-06-19 18:15:33 +02001205#endif
Glenn L McGrath7ca04f32002-09-25 02:47:48 +00001206
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001207 if (opt & OPT_ANY_COMPRESS) {
Denys Vlasenkob4c11c12014-12-07 00:44:00 +01001208 USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_state_t *xstate);)
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001209 USE_FOR_NOMMU(const char *xformer_prog;)
1210
Ming Liu978307f2017-06-02 10:47:23 +02001211 if (opt & OPT_COMPRESS) {
1212 USE_FOR_MMU(IF_FEATURE_SEAMLESS_Z(xformer = unpack_Z_stream;))
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001213 USE_FOR_NOMMU(xformer_prog = "uncompress";)
Ming Liu978307f2017-06-02 10:47:23 +02001214 }
1215 if (opt & OPT_GZIP) {
1216 USE_FOR_MMU(IF_FEATURE_SEAMLESS_GZ(xformer = unpack_gz_stream;))
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001217 USE_FOR_NOMMU(xformer_prog = "gunzip";)
Ming Liu978307f2017-06-02 10:47:23 +02001218 }
1219 if (opt & OPT_BZIP2) {
1220 USE_FOR_MMU(IF_FEATURE_SEAMLESS_BZ2(xformer = unpack_bz2_stream;))
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001221 USE_FOR_NOMMU(xformer_prog = "bunzip2";)
Ming Liu978307f2017-06-02 10:47:23 +02001222 }
1223 if (opt & OPT_LZMA) {
1224 USE_FOR_MMU(IF_FEATURE_SEAMLESS_LZMA(xformer = unpack_lzma_stream;))
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001225 USE_FOR_NOMMU(xformer_prog = "unlzma";)
Ming Liu978307f2017-06-02 10:47:23 +02001226 }
1227 if (opt & OPT_XZ) {
1228 USE_FOR_MMU(IF_FEATURE_SEAMLESS_XZ(xformer = unpack_xz_stream;))
Boris Reisigdfc24732012-05-24 09:01:55 +02001229 USE_FOR_NOMMU(xformer_prog = "unxz";)
Ming Liu978307f2017-06-02 10:47:23 +02001230 }
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001231
Denys Vlasenkob4c11c12014-12-07 00:44:00 +01001232 fork_transformer_with_sig(tar_handle->src_fd, xformer, xformer_prog);
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001233 /* Can't lseek over pipes */
1234 tar_handle->seek = seek_by_read;
1235 /*tar_handle->offset = 0; - already is */
1236 }
1237
Denys Vlasenko0545e3b2013-11-19 17:17:48 +01001238 /* Zero processed headers (== empty file) is not a valid tarball.
1239 * We (ab)use bb_got_signal as exitcode here,
1240 * because check_errors_in_children() uses _it_ as error indicator.
1241 */
1242 bb_got_signal = EXIT_FAILURE;
1243
Denys Vlasenko8a6a2f92012-03-06 16:27:48 +01001244 while (get_header_tar(tar_handle) == EXIT_SUCCESS)
Denys Vlasenko0545e3b2013-11-19 17:17:48 +01001245 bb_got_signal = EXIT_SUCCESS; /* saw at least one header, good */
Denis Vlasenkob8a8e602006-11-24 14:59:45 +00001246
Denys Vlasenkoa84db182018-02-20 15:57:45 +01001247 create_symlinks_from_list(tar_handle->symlink_placeholders);
1248
Denis Vlasenkob8a8e602006-11-24 14:59:45 +00001249 /* Check that every file that should have been extracted was */
1250 while (tar_handle->accept) {
1251 if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
1252 && !find_list_entry(tar_handle->passed, tar_handle->accept->data)
1253 ) {
1254 bb_error_msg_and_die("%s: not found in archive",
1255 tar_handle->accept->data);
1256 }
1257 tar_handle->accept = tar_handle->accept->link;
1258 }
1259 if (ENABLE_FEATURE_CLEAN_UP /* && tar_handle->src_fd != STDIN_FILENO */)
Glenn L McGrath8132e932002-09-28 02:06:39 +00001260 close(tar_handle->src_fd);
Glenn L McGrath7ca04f32002-09-25 02:47:48 +00001261
Denys Vlasenkofaac1d32012-03-06 16:33:42 +01001262 if (SEAMLESS_COMPRESSION || OPT_COMPRESS) {
Denys Vlasenko0545e3b2013-11-19 17:17:48 +01001263 /* Set bb_got_signal to 1 if a child died with !0 exitcode */
Denys Vlasenkofaac1d32012-03-06 16:33:42 +01001264 check_errors_in_children(0);
Denys Vlasenkofaac1d32012-03-06 16:33:42 +01001265 }
Denys Vlasenko0545e3b2013-11-19 17:17:48 +01001266
1267 return bb_got_signal;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +00001268}