blob: 7d7bf79d6e7e2d28f6059afb2a09b0fc82e7d64d [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
Glenn L McGrathc6992fe2004-04-25 05:11:19 +00006 * Glenn McGrath <bug1@iinet.net.au>
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.
18 * Permission to distribute sash derived code under the GPL has been granted.
19 *
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 *
Bernhard Reutner-Fischerd9cf7ac2006-04-12 18:39:58 +000023 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Eric Andersencc8ed391999-10-05 16:24:54 +000024 */
25
Rob Landley1bfca7b2006-09-10 03:20:37 +000026#include <fnmatch.h>
27#include <getopt.h>
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000028#include "libbb.h"
Denis Vlasenko218f2f42007-01-24 22:02:01 +000029#include "unarchive.h"
Eric Andersencc8ed391999-10-05 16:24:54 +000030
Denis Vlasenko74324c82007-06-04 10:16:52 +000031#define block_buf bb_common_bufsiz1
32
Denis Vlasenkod031ffa2006-11-24 21:54:44 +000033#if ENABLE_FEATURE_TAR_CREATE
Eric Andersencc8ed391999-10-05 16:24:54 +000034
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000035/* Tar file constants */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000036
Rob Landley3ee6c242005-10-15 03:06:21 +000037#define TAR_BLOCK_SIZE 512
Eric Andersencc8ed391999-10-05 16:24:54 +000038
Erik Andersen298854f2000-03-23 01:09:18 +000039/* POSIX tar Header Block, from POSIX 1003.1-1990 */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +000040#define NAME_SIZE 100
41#define NAME_SIZE_STR "100"
Denis Vlasenko218f2f42007-01-24 22:02:01 +000042typedef struct TarHeader TarHeader;
Denis Vlasenko376ce1e2006-11-24 14:51:01 +000043struct TarHeader { /* byte offset */
44 char name[NAME_SIZE]; /* 0-99 */
45 char mode[8]; /* 100-107 */
46 char uid[8]; /* 108-115 */
47 char gid[8]; /* 116-123 */
48 char size[12]; /* 124-135 */
49 char mtime[12]; /* 136-147 */
50 char chksum[8]; /* 148-155 */
51 char typeflag; /* 156-156 */
52 char linkname[NAME_SIZE]; /* 157-256 */
53 char magic[6]; /* 257-262 */
54 char version[2]; /* 263-264 */
55 char uname[32]; /* 265-296 */
56 char gname[32]; /* 297-328 */
57 char devmajor[8]; /* 329-336 */
58 char devminor[8]; /* 337-344 */
59 char prefix[155]; /* 345-499 */
60 char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
Erik Andersen298854f2000-03-23 01:09:18 +000061};
Eric Andersencc8ed391999-10-05 16:24:54 +000062
Eric Andersen3d957c82000-12-07 00:34:58 +000063/*
Denis Vlasenko4fbb5842006-11-24 14:55:23 +000064** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
Eric Andersen3d957c82000-12-07 00:34:58 +000065** the only functions that deal with the HardLinkInfo structure.
66** Even these functions use the xxxHardLinkInfo() functions.
67*/
68typedef struct HardLinkInfo HardLinkInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +000069struct HardLinkInfo {
70 HardLinkInfo *next; /* Next entry in list */
Rob Landley60fe7bf2005-10-16 03:54:49 +000071 dev_t dev; /* Device number */
72 ino_t ino; /* Inode number */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000073 short linkCount; /* (Hard) Link Count */
74 char name[1]; /* Start of filename (must be last) */
Eric Andersen3d957c82000-12-07 00:34:58 +000075};
76
Erik Andersen68a9ea42000-04-04 18:39:50 +000077/* Some info to be carried along when creating a new tarball */
Denis Vlasenko218f2f42007-01-24 22:02:01 +000078typedef struct TarBallInfo TarBallInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +000079struct TarBallInfo {
Rob Landley60fe7bf2005-10-16 03:54:49 +000080 int tarFd; /* Open-for-write file descriptor
Tim Rikerc1ef7bd2006-01-25 00:08:53 +000081 for the tarball */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000082 struct stat statBuf; /* Stat info for the tarball, letting
83 us know the inode and device that the
Eric Andersenc7bda1c2004-03-15 08:29:22 +000084 tarball lives, so we can avoid trying
Glenn L McGratha0ee8812002-08-22 13:44:08 +000085 to include the tarball into itself */
Rob Landley60fe7bf2005-10-16 03:54:49 +000086 int verboseFlag; /* Whether to print extra stuff or not */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +000087 const llist_t *excludeList; /* List of files to not include */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000088 HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
89 HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
Erik Andersen68a9ea42000-04-04 18:39:50 +000090};
Erik Andersen68a9ea42000-04-04 18:39:50 +000091
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000092/* A nice enum with all the possible tar file content types */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000093enum TarFileType {
94 REGTYPE = '0', /* regular file */
95 REGTYPE0 = '\0', /* regular file (ancient bug compat) */
96 LNKTYPE = '1', /* hard link */
97 SYMTYPE = '2', /* symbolic link */
98 CHRTYPE = '3', /* character special */
99 BLKTYPE = '4', /* block special */
100 DIRTYPE = '5', /* directory */
101 FIFOTYPE = '6', /* FIFO special */
102 CONTTYPE = '7', /* reserved */
103 GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
104 GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000105};
106typedef enum TarFileType TarFileType;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000107
Eric Andersen3d957c82000-12-07 00:34:58 +0000108/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
Rob Landley88621d72006-08-29 19:41:06 +0000109static void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
Glenn L McGrathf66de642002-11-25 23:57:27 +0000110 struct stat *statbuf,
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000111 const char *fileName)
Eric Andersen3d957c82000-12-07 00:34:58 +0000112{
113 /* Note: hlInfoHeadPtr can never be NULL! */
114 HardLinkInfo *hlInfo;
115
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000116 hlInfo = xmalloc(sizeof(HardLinkInfo) + strlen(fileName));
Glenn L McGrathf66de642002-11-25 23:57:27 +0000117 hlInfo->next = *hlInfoHeadPtr;
118 *hlInfoHeadPtr = hlInfo;
119 hlInfo->dev = statbuf->st_dev;
120 hlInfo->ino = statbuf->st_ino;
121 hlInfo->linkCount = statbuf->st_nlink;
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000122 strcpy(hlInfo->name, fileName);
Eric Andersen3d957c82000-12-07 00:34:58 +0000123}
124
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000125static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
Eric Andersen3d957c82000-12-07 00:34:58 +0000126{
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000127 HardLinkInfo *hlInfo;
128 HardLinkInfo *hlInfoNext;
Eric Andersen3d957c82000-12-07 00:34:58 +0000129
130 if (hlInfoHeadPtr) {
131 hlInfo = *hlInfoHeadPtr;
132 while (hlInfo) {
133 hlInfoNext = hlInfo->next;
134 free(hlInfo);
135 hlInfo = hlInfoNext;
136 }
137 *hlInfoHeadPtr = NULL;
138 }
Eric Andersen3d957c82000-12-07 00:34:58 +0000139}
140
141/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
Rob Landley88621d72006-08-29 19:41:06 +0000142static HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
Eric Andersen3d957c82000-12-07 00:34:58 +0000143{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000144 while (hlInfo) {
Glenn L McGrathf66de642002-11-25 23:57:27 +0000145 if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
Eric Andersen3d957c82000-12-07 00:34:58 +0000146 break;
147 hlInfo = hlInfo->next;
148 }
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000149 return hlInfo;
Eric Andersen3d957c82000-12-07 00:34:58 +0000150}
151
Erik Andersen6acaa402000-03-26 14:03:20 +0000152/* Put an octal string into the specified buffer.
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000153 * The number is zero padded and possibly null terminated.
Denis Vlasenko87cd4a82006-11-25 23:47:32 +0000154 * Stores low-order bits only if whole value does not fit. */
155static void putOctal(char *cp, int len, off_t value)
Erik Andersen6acaa402000-03-26 14:03:20 +0000156{
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000157 char tempBuffer[sizeof(off_t)*3+1];
Erik Andersen5661fe02000-04-05 01:00:52 +0000158 char *tempString = tempBuffer;
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000159 int width;
Erik Andersen6acaa402000-03-26 14:03:20 +0000160
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000161 width = sprintf(tempBuffer, "%0*"OFF_FMT"o", len, value);
162 tempString += (width - len);
Erik Andersen6acaa402000-03-26 14:03:20 +0000163
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000164 /* If string has leading zeroes, we can drop one */
165 /* and field will have trailing '\0' */
166 /* (increases chances of compat with other tars) */
167 if (tempString[0] == '0')
168 tempString++;
Erik Andersen6acaa402000-03-26 14:03:20 +0000169
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000170 /* Copy the string to the field */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000171 memcpy(cp, tempString, len);
Erik Andersen6acaa402000-03-26 14:03:20 +0000172}
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000173#define PUT_OCTAL(a, b) putOctal((a), sizeof(a), (b))
174
175static void chksum_and_xwrite(int fd, struct TarHeader* hp)
176{
Denis Vlasenkodcbd51d2007-03-03 20:06:59 +0000177 /* POSIX says that checksum is done on unsigned bytes
Denis Vlasenko940494f2007-03-04 18:09:50 +0000178 * (Sun and HP-UX gets it wrong... more details in
Denis Vlasenkodcbd51d2007-03-03 20:06:59 +0000179 * GNU tar source) */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000180 const unsigned char *cp;
181 int chksum, size;
182
183 strcpy(hp->magic, "ustar ");
184
185 /* Calculate and store the checksum (i.e., the sum of all of the bytes of
186 * the header). The checksum field must be filled with blanks for the
187 * calculation. The checksum field is formatted differently from the
188 * other fields: it has 6 digits, a null, then a space -- rather than
189 * digits, followed by a null like the other fields... */
190 memset(hp->chksum, ' ', sizeof(hp->chksum));
191 cp = (const unsigned char *) hp;
192 chksum = 0;
193 size = sizeof(*hp);
194 do { chksum += *cp++; } while (--size);
195 putOctal(hp->chksum, sizeof(hp->chksum)-1, chksum);
196
197 /* Now write the header out to disk */
198 xwrite(fd, hp, sizeof(*hp));
199}
200
201#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
202static void writeLongname(int fd, int type, const char *name, int dir)
203{
204 static const struct {
205 char mode[8]; /* 100-107 */
206 char uid[8]; /* 108-115 */
207 char gid[8]; /* 116-123 */
208 char size[12]; /* 124-135 */
209 char mtime[12]; /* 136-147 */
210 } prefilled = {
211 "0000000",
212 "0000000",
213 "0000000",
214 "00000000000",
215 "00000000000",
216 };
217 struct TarHeader header;
218 int size;
219
220 dir = !!dir; /* normalize: 0/1 */
221 size = strlen(name) + 1 + dir; /* GNU tar uses strlen+1 */
222 /* + dir: account for possible '/' */
223
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000224 memset(&header, 0, sizeof(header));
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000225 strcpy(header.name, "././@LongLink");
226 memcpy(header.mode, prefilled.mode, sizeof(prefilled));
227 PUT_OCTAL(header.size, size);
228 header.typeflag = type;
229 chksum_and_xwrite(fd, &header);
230
231 /* Write filename[/] and pad the block. */
232 /* dir=0: writes 'name<NUL>', pads */
233 /* dir=1: writes 'name', writes '/<NUL>', pads */
234 dir *= 2;
235 xwrite(fd, name, size - dir);
236 xwrite(fd, "/", dir);
237 size = (-size) & (TAR_BLOCK_SIZE-1);
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000238 memset(&header, 0, size);
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000239 xwrite(fd, &header, size);
240}
241#endif
Erik Andersen6acaa402000-03-26 14:03:20 +0000242
Erik Andersen68a9ea42000-04-04 18:39:50 +0000243/* Write out a tar header for the specified file/directory/whatever */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000244void BUG_tar_header_size(void);
Rob Landley88621d72006-08-29 19:41:06 +0000245static int writeTarHeader(struct TarBallInfo *tbInfo,
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000246 const char *header_name, const char *fileName, struct stat *statbuf)
Erik Andersen6acaa402000-03-26 14:03:20 +0000247{
Erik Andersen5661fe02000-04-05 01:00:52 +0000248 struct TarHeader header;
Erik Andersen3364d782000-03-28 00:58:14 +0000249
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000250 if (sizeof(header) != 512)
251 BUG_tar_header_size();
252
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000253 memset(&header, 0, sizeof(struct TarHeader));
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000254
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000255 strncpy(header.name, header_name, sizeof(header.name));
Erik Andersenecd51242000-04-08 03:08:21 +0000256
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000257 /* POSIX says to mask mode with 07777. */
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000258 PUT_OCTAL(header.mode, statbuf->st_mode & 07777);
259 PUT_OCTAL(header.uid, statbuf->st_uid);
260 PUT_OCTAL(header.gid, statbuf->st_gid);
Denis Vlasenkob8a8e602006-11-24 14:59:45 +0000261 memset(header.size, '0', sizeof(header.size)-1); /* Regular file size is handled later */
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000262 PUT_OCTAL(header.mtime, statbuf->st_mtime);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000263
Denis Vlasenkoc50f3702006-11-24 14:57:31 +0000264 /* Enter the user and group names */
265 safe_strncpy(header.uname, get_cached_username(statbuf->st_uid), sizeof(header.uname));
266 safe_strncpy(header.gname, get_cached_groupname(statbuf->st_gid), sizeof(header.gname));
Erik Andersen5661fe02000-04-05 01:00:52 +0000267
Eric Andersen3d957c82000-12-07 00:34:58 +0000268 if (tbInfo->hlInfo) {
269 /* This is a hard link */
270 header.typeflag = LNKTYPE;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000271 strncpy(header.linkname, tbInfo->hlInfo->name,
272 sizeof(header.linkname));
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000273#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
274 /* Write out long linkname if needed */
275 if (header.linkname[sizeof(header.linkname)-1])
276 writeLongname(tbInfo->tarFd, GNULONGLINK,
277 tbInfo->hlInfo->name, 0);
278#endif
Eric Andersen3d957c82000-12-07 00:34:58 +0000279 } else if (S_ISLNK(statbuf->st_mode)) {
Denis Vlasenko6ca04442007-02-11 16:19:28 +0000280 char *lpath = xmalloc_readlink_or_warn(fileName);
281 if (!lpath)
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000282 return FALSE;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000283 header.typeflag = SYMTYPE;
284 strncpy(header.linkname, lpath, sizeof(header.linkname));
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000285#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
286 /* Write out long linkname if needed */
287 if (header.linkname[sizeof(header.linkname)-1])
288 writeLongname(tbInfo->tarFd, GNULONGLINK, lpath, 0);
289#else
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000290 /* If it is larger than 100 bytes, bail out */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000291 if (header.linkname[sizeof(header.linkname)-1]) {
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000292 free(lpath);
293 bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
294 return FALSE;
295 }
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000296#endif
Mark Whitley8a633262001-04-30 18:17:00 +0000297 free(lpath);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000298 } else if (S_ISDIR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000299 header.typeflag = DIRTYPE;
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000300 /* Append '/' only if there is a space for it */
301 if (!header.name[sizeof(header.name)-1])
302 header.name[strlen(header.name)] = '/';
Erik Andersen68a9ea42000-04-04 18:39:50 +0000303 } else if (S_ISCHR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000304 header.typeflag = CHRTYPE;
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000305 PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
306 PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000307 } else if (S_ISBLK(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000308 header.typeflag = BLKTYPE;
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000309 PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
310 PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000311 } else if (S_ISFIFO(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000312 header.typeflag = FIFOTYPE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000313 } else if (S_ISREG(statbuf->st_mode)) {
Denis Vlasenko87cd4a82006-11-25 23:47:32 +0000314 if (sizeof(statbuf->st_size) > 4
315 && statbuf->st_size > (off_t)0777777777777LL
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000316 ) {
317 bb_error_msg_and_die("cannot store file '%s' "
318 "of size %"OFF_FMT"d, aborting",
319 fileName, statbuf->st_size);
320 }
Denis Vlasenko87cd4a82006-11-25 23:47:32 +0000321 header.typeflag = REGTYPE;
322 PUT_OCTAL(header.size, statbuf->st_size);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000323 } else {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000324 bb_error_msg("%s: unknown file type", fileName);
325 return FALSE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000326 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000327
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000328#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
329 /* Write out long name if needed */
330 /* (we, like GNU tar, output long linkname *before* long name) */
331 if (header.name[sizeof(header.name)-1])
332 writeLongname(tbInfo->tarFd, GNULONGNAME,
333 header_name, S_ISDIR(statbuf->st_mode));
334#endif
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000335
Erik Andersen5661fe02000-04-05 01:00:52 +0000336 /* Now write the header out to disk */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000337 chksum_and_xwrite(tbInfo->tarFd, &header);
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000338
Erik Andersen5661fe02000-04-05 01:00:52 +0000339 /* Now do the verbose thing (or not) */
Robert Grieblf2f26e72002-07-23 22:05:47 +0000340 if (tbInfo->verboseFlag) {
Eric Andersenfdd51032000-08-02 18:48:26 +0000341 FILE *vbFd = stdout;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000342
Eric Andersen70060d22004-03-27 10:02:48 +0000343 if (tbInfo->tarFd == STDOUT_FILENO) /* If the archive goes to stdout, verbose to stderr */
Eric Andersenfdd51032000-08-02 18:48:26 +0000344 vbFd = stderr;
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000345 /* GNU "tar cvvf" prints "extended" listing a-la "ls -l" */
346 /* We don't have such excesses here: for us "v" == "vv" */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000347 /* '/' is probably a GNUism */
348 fprintf(vbFd, "%s%s\n", header_name,
349 S_ISDIR(statbuf->st_mode) ? "/" : "");
Eric Andersenfdd51032000-08-02 18:48:26 +0000350 }
Erik Andersen3364d782000-03-28 00:58:14 +0000351
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000352 return TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +0000353}
354
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000355#if ENABLE_FEATURE_TAR_FROM
Rob Landley88621d72006-08-29 19:41:06 +0000356static int exclude_file(const llist_t *excluded_files, const char *file)
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000357{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000358 while (excluded_files) {
359 if (excluded_files->data[0] == '/') {
360 if (fnmatch(excluded_files->data, file,
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000361 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
362 return 1;
363 } else {
364 const char *p;
365
366 for (p = file; p[0] != '\0'; p++) {
367 if ((p == file || p[-1] == '/') && p[0] != '/' &&
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000368 fnmatch(excluded_files->data, p,
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000369 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
370 return 1;
371 }
372 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000373 excluded_files = excluded_files->link;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000374 }
375
376 return 0;
377}
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000378#else
"Vladimir N. Oleynik"a62b0e72005-12-06 12:20:57 +0000379#define exclude_file(excluded_files, file) 0
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000380#endif
Erik Andersen3364d782000-03-28 00:58:14 +0000381
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000382static int writeFileToTarball(const char *fileName, struct stat *statbuf,
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000383 void *userData, int depth ATTRIBUTE_UNUSED)
Erik Andersen3364d782000-03-28 00:58:14 +0000384{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000385 struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
Matt Kraaie80a2632000-12-19 20:45:49 +0000386 const char *header_name;
Rob Landleye5695532006-01-09 03:07:44 +0000387 int inputFileFd = -1;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000388
Eric Andersen3d957c82000-12-07 00:34:58 +0000389 /*
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000390 * Check to see if we are dealing with a hard link.
391 * If so -
392 * Treat the first occurance of a given dev/inode as a file while
393 * treating any additional occurances as hard links. This is done
394 * by adding the file information to the HardLinkInfo linked list.
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000395 */
Eric Andersen3d957c82000-12-07 00:34:58 +0000396 tbInfo->hlInfo = NULL;
397 if (statbuf->st_nlink > 1) {
Glenn L McGrathf66de642002-11-25 23:57:27 +0000398 tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
Eric Andersen3d957c82000-12-07 00:34:58 +0000399 if (tbInfo->hlInfo == NULL)
Glenn L McGrathf66de642002-11-25 23:57:27 +0000400 addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
Eric Andersen3d957c82000-12-07 00:34:58 +0000401 }
402
Erik Andersen68a9ea42000-04-04 18:39:50 +0000403 /* It is against the rules to archive a socket */
404 if (S_ISSOCK(statbuf->st_mode)) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000405 bb_error_msg("%s: socket ignored", fileName);
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000406 return TRUE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000407 }
408
409 /* It is a bad idea to store the archive we are in the process of creating,
410 * so check the device and inode to be sure that this particular file isn't
411 * the new tarball */
412 if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000413 tbInfo->statBuf.st_ino == statbuf->st_ino) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000414 bb_error_msg("%s: file is the archive; skipping", fileName);
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000415 return TRUE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000416 }
417
Matt Kraaie80a2632000-12-19 20:45:49 +0000418 header_name = fileName;
419 while (header_name[0] == '/') {
Denis Vlasenko931de892007-06-21 12:43:45 +0000420 static smallint warned;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000421
Denis Vlasenko931de892007-06-21 12:43:45 +0000422 if (!warned) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000423 bb_error_msg("removing leading '/' from member names");
Denis Vlasenko931de892007-06-21 12:43:45 +0000424 warned = 1;
Matt Kraaia1f97752000-12-19 06:24:08 +0000425 }
Matt Kraaie80a2632000-12-19 20:45:49 +0000426 header_name++;
Matt Kraaia1f97752000-12-19 06:24:08 +0000427 }
428
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000429#if !ENABLE_FEATURE_TAR_GNU_EXTENSIONS
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000430 if (strlen(fileName) >= NAME_SIZE) {
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000431 bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000432 return TRUE;
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000433 }
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000434#endif
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000435
Matt Kraaie80a2632000-12-19 20:45:49 +0000436 if (header_name[0] == '\0')
Matt Kraaia1f97752000-12-19 06:24:08 +0000437 return TRUE;
438
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000439 if (exclude_file(tbInfo->excludeList, header_name))
Matt Kraaibe7499c2001-01-03 17:22:10 +0000440 return SKIP;
Matt Kraaia1f97752000-12-19 06:24:08 +0000441
Rob Landleye5695532006-01-09 03:07:44 +0000442 /* Is this a regular file? */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000443 if (tbInfo->hlInfo == NULL && S_ISREG(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000444 /* open the file we want to archive, and make sure all is well */
Denis Vlasenko50f7f442007-04-11 23:20:53 +0000445 inputFileFd = open_or_warn(fileName, O_RDONLY);
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000446 if (inputFileFd < 0) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000447 return FALSE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000448 }
Rob Landleye5695532006-01-09 03:07:44 +0000449 }
450
451 /* Add an entry to the tarball */
452 if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000453 return FALSE;
Rob Landleye5695532006-01-09 03:07:44 +0000454 }
455
456 /* If it was a regular file, write out the body */
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000457 if (inputFileFd >= 0) {
Denis Vlasenko714701c2006-12-22 00:21:07 +0000458 size_t readSize;
Denis Vlasenko50f7f442007-04-11 23:20:53 +0000459 /* Write the file to the archive. */
Denis Vlasenko714701c2006-12-22 00:21:07 +0000460 /* We record size into header first, */
461 /* and then write out file. If file shrinks in between, */
462 /* tar will be corrupted. So we don't allow for that. */
463 /* NB: GNU tar 1.16 warns and pads with zeroes */
464 /* or even seeks back and updates header */
465 bb_copyfd_exact_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
466 ////off_t readSize;
467 ////readSize = bb_copyfd_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
468 ////if (readSize != statbuf->st_size && readSize >= 0) {
469 //// bb_error_msg_and_die("short read from %s, aborting", fileName);
470 ////}
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000471
Denis Vlasenko4fbb5842006-11-24 14:55:23 +0000472 /* Check that file did not grow in between? */
Denis Vlasenko714701c2006-12-22 00:21:07 +0000473 /* if (safe_read(inputFileFd, 1) == 1) warn but continue? */
474
Rob Landleye5695532006-01-09 03:07:44 +0000475 close(inputFileFd);
Glenn L McGrath7ffe1332003-11-21 22:24:57 +0000476
Erik Andersen5661fe02000-04-05 01:00:52 +0000477 /* Pad the file up to the tar block size */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000478 /* (a few tricks here in the name of code size) */
Denis Vlasenko714701c2006-12-22 00:21:07 +0000479 readSize = (-(int)statbuf->st_size) & (TAR_BLOCK_SIZE-1);
Denis Vlasenko74324c82007-06-04 10:16:52 +0000480 memset(block_buf, 0, readSize);
481 xwrite(tbInfo->tarFd, block_buf, readSize);
Erik Andersen5661fe02000-04-05 01:00:52 +0000482 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000483
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000484 return TRUE;
Erik Andersen6acaa402000-03-26 14:03:20 +0000485}
486
Rob Landley88621d72006-08-29 19:41:06 +0000487static int writeTarFile(const int tar_fd, const int verboseFlag,
Glenn L McGrath303e9892004-01-25 05:48:28 +0000488 const unsigned long dereferenceFlag, const llist_t *include,
489 const llist_t *exclude, const int gzip)
Erik Andersen6acaa402000-03-26 14:03:20 +0000490{
Robert Grieblf2f26e72002-07-23 22:05:47 +0000491 pid_t gzipPid = 0;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000492 int errorFlag = FALSE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000493 struct TarBallInfo tbInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000494
Eric Andersen3d957c82000-12-07 00:34:58 +0000495 tbInfo.hlInfoHead = NULL;
Erik Andersen3364d782000-03-28 00:58:14 +0000496
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000497 fchmod(tar_fd, 0644);
498 tbInfo.tarFd = tar_fd;
499 tbInfo.verboseFlag = verboseFlag;
Robert Grieblf2f26e72002-07-23 22:05:47 +0000500
Erik Andersen68a9ea42000-04-04 18:39:50 +0000501 /* Store the stat info for the tarball's file, so
502 * can avoid including the tarball into itself.... */
503 if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000504 bb_perror_msg_and_die("cannot stat tar file");
Erik Andersen6acaa402000-03-26 14:03:20 +0000505
Rob Landleycc8885f2005-08-30 03:40:03 +0000506 if ((ENABLE_FEATURE_TAR_GZIP || ENABLE_FEATURE_TAR_BZIP2) && gzip) {
507 int gzipDataPipe[2] = { -1, -1 };
508 int gzipStatusPipe[2] = { -1, -1 };
509 volatile int vfork_exec_errno = 0;
Denis Vlasenkoa41fdf32007-01-29 22:51:00 +0000510 const char *zip_exec = (gzip == 1) ? "gzip" : "bzip2";
Rob Landleycc8885f2005-08-30 03:40:03 +0000511
Denis Vlasenko5a6aedd2007-05-26 16:44:20 +0000512 xpipe(gzipDataPipe);
513 xpipe(gzipStatusPipe);
Robert Grieblf2f26e72002-07-23 22:05:47 +0000514
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000515 signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
Robert Grieblf2f26e72002-07-23 22:05:47 +0000516
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000517#if defined(__GNUC__) && __GNUC__
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000518 /* Avoid vfork clobbering */
519 (void) &include;
520 (void) &errorFlag;
521 (void) &zip_exec;
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000522#endif
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000523
Glenn L McGrathf66de642002-11-25 23:57:27 +0000524 gzipPid = vfork();
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000525
526 if (gzipPid == 0) {
527 dup2(gzipDataPipe[0], 0);
528 close(gzipDataPipe[1]);
529
Denis Vlasenkob8a8e602006-11-24 14:59:45 +0000530 dup2(tbInfo.tarFd, 1);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000531
532 close(gzipStatusPipe[0]);
Bernhard Reutner-Fischer126da9e2005-12-12 11:20:39 +0000533 fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows success */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000534
Denis Vlasenko1d76f432007-02-06 01:20:12 +0000535 BB_EXECLP(zip_exec, zip_exec, "-f", NULL);
Glenn L McGrathf66de642002-11-25 23:57:27 +0000536 vfork_exec_errno = errno;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000537
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000538 close(gzipStatusPipe[1]);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000539 exit(-1);
540 } else if (gzipPid > 0) {
541 close(gzipDataPipe[0]);
542 close(gzipStatusPipe[1]);
543
544 while (1) {
Robert Grieblf2f26e72002-07-23 22:05:47 +0000545 char buf;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000546
Rob Landley53437472006-07-16 08:14:35 +0000547 int n = full_read(gzipStatusPipe[0], &buf, 1);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000548
Glenn L McGrathf66de642002-11-25 23:57:27 +0000549 if (n == 0 && vfork_exec_errno != 0) {
550 errno = vfork_exec_errno;
Denis Vlasenkoea620772006-10-14 02:23:43 +0000551 bb_perror_msg_and_die("cannot exec %s", zip_exec);
Glenn L McGrathf66de642002-11-25 23:57:27 +0000552 } else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000553 continue; /* try it again */
554 break;
Robert Grieblf2f26e72002-07-23 22:05:47 +0000555 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000556 close(gzipStatusPipe[0]);
557
558 tbInfo.tarFd = gzipDataPipe[1];
Rob Landley60fe7bf2005-10-16 03:54:49 +0000559 } else bb_perror_msg_and_die("vfork gzip");
Robert Grieblf2f26e72002-07-23 22:05:47 +0000560 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000561
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000562 tbInfo.excludeList = exclude;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000563
Erik Andersen6acaa402000-03-26 14:03:20 +0000564 /* Read the directory/files and iterate over them one at a time */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000565 while (include) {
Denis Vlasenkobbd695d2007-04-08 10:52:28 +0000566 if (!recursive_action(include->data, ACTION_RECURSE |
567 (dereferenceFlag ? ACTION_FOLLOWLINKS : 0),
Bernhard Reutner-Fischer3e816c12007-03-29 10:30:50 +0000568 writeFileToTarball, writeFileToTarball, &tbInfo, 0))
Rob Landley60fe7bf2005-10-16 03:54:49 +0000569 {
Erik Andersen68a9ea42000-04-04 18:39:50 +0000570 errorFlag = TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +0000571 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000572 include = include->link;
Erik Andersen6acaa402000-03-26 14:03:20 +0000573 }
Erik Andersen5661fe02000-04-05 01:00:52 +0000574 /* Write two empty blocks to the end of the archive */
Denis Vlasenko74324c82007-06-04 10:16:52 +0000575 memset(block_buf, 0, 2*TAR_BLOCK_SIZE);
576 xwrite(tbInfo.tarFd, block_buf, 2*TAR_BLOCK_SIZE);
Erik Andersen0817d132000-04-09 15:17:40 +0000577
578 /* To be pedantically correct, we would check if the tarball
Eric Andersen3c5ee9a2000-11-14 22:15:48 +0000579 * is smaller than 20 tar blocks, and pad it if it was smaller,
Erik Andersen0817d132000-04-09 15:17:40 +0000580 * but that isn't necessary for GNU tar interoperability, and
581 * so is considered a waste of space */
582
Rob Landley1a781032005-12-16 21:33:10 +0000583 /* Close so the child process (if any) will exit */
584 close(tbInfo.tarFd);
585
Erik Andersen68a9ea42000-04-04 18:39:50 +0000586 /* Hang up the tools, close up shop, head home */
Rob Landley1a781032005-12-16 21:33:10 +0000587 if (ENABLE_FEATURE_CLEAN_UP)
Rob Landley60fe7bf2005-10-16 03:54:49 +0000588 freeHardLinkInfo(&tbInfo.hlInfoHead);
Rob Landley60fe7bf2005-10-16 03:54:49 +0000589
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000590 if (errorFlag)
Denis Vlasenkoe1a0d482006-10-20 13:28:22 +0000591 bb_error_msg("error exit delayed from previous errors");
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000592
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000593 if (gzipPid) {
594 int status;
595 if (waitpid(gzipPid, &status, 0) == -1)
596 bb_perror_msg("waitpid");
597 else if (!WIFEXITED(status) || WEXITSTATUS(status))
598 /* gzip was killed or has exited with nonzero! */
599 errorFlag = TRUE;
600 }
601 return errorFlag;
Erik Andersen6acaa402000-03-26 14:03:20 +0000602}
Rob Landley60fe7bf2005-10-16 03:54:49 +0000603#else
604int writeTarFile(const int tar_fd, const int verboseFlag,
605 const unsigned long dereferenceFlag, const llist_t *include,
606 const llist_t *exclude, const int gzip);
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000607#endif /* FEATURE_TAR_CREATE */
Erik Andersen6acaa402000-03-26 14:03:20 +0000608
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000609#if ENABLE_FEATURE_TAR_FROM
Eric Andersen27cb6842003-06-26 09:07:59 +0000610static llist_t *append_file_list_to_list(llist_t *list)
Glenn L McGrathd642a672001-10-13 06:54:45 +0000611{
Eric Andersen27cb6842003-06-26 09:07:59 +0000612 FILE *src_stream;
613 llist_t *cur = list;
614 llist_t *tmp;
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000615 char *line;
Eric Andersen27cb6842003-06-26 09:07:59 +0000616 llist_t *newlist = NULL;
617
Rob Landley60fe7bf2005-10-16 03:54:49 +0000618 while (cur) {
Rob Landley86b4d642006-08-03 17:58:17 +0000619 src_stream = xfopen(cur->data, "r");
Eric Andersen27cb6842003-06-26 09:07:59 +0000620 tmp = cur;
621 cur = cur->link;
622 free(tmp);
Denis Vlasenko2d5ca602006-10-12 22:43:20 +0000623 while ((line = xmalloc_getline(src_stream)) != NULL) {
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000624 /* kill trailing '/' unless the string is just "/" */
625 char *cp = last_char_is(line, '/');
626 if (cp > line)
627 *cp = '\0';
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000628 llist_add_to(&newlist, line);
Denis Vlasenko314908d2006-09-03 14:04:33 +0000629 }
Rob Landley60fe7bf2005-10-16 03:54:49 +0000630 fclose(src_stream);
Eric Andersen27cb6842003-06-26 09:07:59 +0000631 }
632 return newlist;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000633}
Rob Landley60fe7bf2005-10-16 03:54:49 +0000634#else
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000635#define append_file_list_to_list(x) 0
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000636#endif
Erik Andersen6acaa402000-03-26 14:03:20 +0000637
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000638#if ENABLE_FEATURE_TAR_COMPRESS
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000639static char get_header_tar_Z(archive_handle_t *archive_handle)
640{
Denis Vlasenkoe1a0d482006-10-20 13:28:22 +0000641 /* Can't lseek over pipes */
Denis Vlasenko13858992006-10-08 12:49:22 +0000642 archive_handle->seek = seek_by_read;
Eric Andersen27cb6842003-06-26 09:07:59 +0000643
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000644 /* do the decompression, and cleanup */
Denis Vlasenkocf30cc82006-11-24 14:53:18 +0000645 if (xread_char(archive_handle->src_fd) != 0x1f
646 || xread_char(archive_handle->src_fd) != 0x9d
647 ) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000648 bb_error_msg_and_die("invalid magic");
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000649 }
650
651 archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress);
652 archive_handle->offset = 0;
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000653 while (get_header_tar(archive_handle) == EXIT_SUCCESS)
654 /* nothing */;
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000655
656 /* Can only do one file at a time */
Denis Vlasenkoe1a0d482006-10-20 13:28:22 +0000657 return EXIT_FAILURE;
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000658}
Rob Landley60fe7bf2005-10-16 03:54:49 +0000659#else
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000660#define get_header_tar_Z NULL
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000661#endif
662
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000663#ifdef CHECK_FOR_CHILD_EXITCODE
664/* Looks like it isn't needed - tar detects malformed (truncated)
665 * archive if e.g. bunzip2 fails */
666static int child_error;
667
668static void handle_SIGCHLD(int status)
669{
670 /* Actually, 'status' is a signo. We reuse it for other needs */
671
672 /* Wait for any child without blocking */
673 if (waitpid(-1, &status, WNOHANG) < 0)
674 /* wait failed?! I'm confused... */
675 return;
676
677 if (WIFEXITED(status) && WEXITSTATUS(status)==0)
678 /* child exited with 0 */
679 return;
Denis Vlasenkof7996f32007-01-11 17:20:00 +0000680 /* Cannot happen?
Denis Vlasenko51742f42007-04-12 00:32:05 +0000681 if (!WIFSIGNALED(status) && !WIFEXITED(status)) return; */
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000682 child_error = 1;
683}
684#endif
685
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000686enum {
687 OPTBIT_KEEP_OLD = 7,
688 USE_FEATURE_TAR_CREATE( OPTBIT_CREATE ,)
689 USE_FEATURE_TAR_CREATE( OPTBIT_DEREFERENCE ,)
690 USE_FEATURE_TAR_BZIP2( OPTBIT_BZIP2 ,)
691 USE_FEATURE_TAR_LZMA( OPTBIT_LZMA ,)
692 USE_FEATURE_TAR_FROM( OPTBIT_INCLUDE_FROM,)
693 USE_FEATURE_TAR_FROM( OPTBIT_EXCLUDE_FROM,)
694 USE_FEATURE_TAR_GZIP( OPTBIT_GZIP ,)
695 USE_FEATURE_TAR_COMPRESS(OPTBIT_COMPRESS ,)
696 OPTBIT_NOPRESERVE_OWN,
697 OPTBIT_NOPRESERVE_PERM,
698 OPT_TEST = 1 << 0, // t
699 OPT_EXTRACT = 1 << 1, // x
700 OPT_BASEDIR = 1 << 2, // C
701 OPT_TARNAME = 1 << 3, // f
702 OPT_2STDOUT = 1 << 4, // O
703 OPT_P = 1 << 5, // p
704 OPT_VERBOSE = 1 << 6, // v
705 OPT_KEEP_OLD = 1 << 7, // k
706 OPT_CREATE = USE_FEATURE_TAR_CREATE( (1<<OPTBIT_CREATE )) + 0, // c
707 OPT_DEREFERENCE = USE_FEATURE_TAR_CREATE( (1<<OPTBIT_DEREFERENCE )) + 0, // h
708 OPT_BZIP2 = USE_FEATURE_TAR_BZIP2( (1<<OPTBIT_BZIP2 )) + 0, // j
709 OPT_LZMA = USE_FEATURE_TAR_LZMA( (1<<OPTBIT_LZMA )) + 0, // a
710 OPT_INCLUDE_FROM = USE_FEATURE_TAR_FROM( (1<<OPTBIT_INCLUDE_FROM)) + 0, // T
711 OPT_EXCLUDE_FROM = USE_FEATURE_TAR_FROM( (1<<OPTBIT_EXCLUDE_FROM)) + 0, // X
712 OPT_GZIP = USE_FEATURE_TAR_GZIP( (1<<OPTBIT_GZIP )) + 0, // z
713 OPT_COMPRESS = USE_FEATURE_TAR_COMPRESS((1<<OPTBIT_COMPRESS )) + 0, // Z
714 OPT_NOPRESERVE_OWN = 1 << OPTBIT_NOPRESERVE_OWN , // no-same-owner
715 OPT_NOPRESERVE_PERM = 1 << OPTBIT_NOPRESERVE_PERM, // no-same-permissions
716};
717#if ENABLE_FEATURE_TAR_LONG_OPTIONS
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000718static const char tar_longopts[] =
719 "list\0" No_argument "t"
720 "extract\0" No_argument "x"
721 "directory\0" Required_argument "C"
722 "file\0" Required_argument "f"
723 "to-stdout\0" No_argument "O"
724 "same-permissions\0" No_argument "p"
725 "verbose\0" No_argument "v"
726 "keep-old\0" No_argument "k"
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000727# if ENABLE_FEATURE_TAR_CREATE
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000728 "create\0" No_argument "c"
729 "dereference\0" No_argument "h"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000730# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000731# if ENABLE_FEATURE_TAR_BZIP2
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000732 "bzip2\0" No_argument "j"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000733# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000734# if ENABLE_FEATURE_TAR_LZMA
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000735 "lzma\0" No_argument "a"
Rob Landleyc1d69902006-01-20 18:28:50 +0000736# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000737# if ENABLE_FEATURE_TAR_FROM
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000738 "files-from\0" Required_argument "T"
739 "exclude-from\0" Required_argument "X"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000740# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000741# if ENABLE_FEATURE_TAR_GZIP
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000742 "gzip\0" No_argument "z"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000743# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000744# if ENABLE_FEATURE_TAR_COMPRESS
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000745 "compress\0" No_argument "Z"
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000746# endif
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000747 "no-same-owner\0" No_argument "\xfd"
748 "no-same-permissions\0" No_argument "\xfe"
Denis Vlasenko30d7a342006-11-27 20:24:40 +0000749 /* --exclude takes next bit position in option mask, */
750 /* therefore we have to either put it _after_ --no-same-perm */
751 /* or add OPT[BIT]_EXCLUDE before OPT[BIT]_NOPRESERVE_OWN */
752# if ENABLE_FEATURE_TAR_FROM
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000753 "exclude\0" Required_argument "\xff"
Denis Vlasenko30d7a342006-11-27 20:24:40 +0000754# endif
Denis Vlasenko990d0f62007-07-24 15:54:42 +0000755 ;
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000756#endif
Glenn L McGrathec87d372002-11-27 07:52:22 +0000757
Denis Vlasenko06af2162007-02-03 17:28:39 +0000758int tar_main(int argc, char **argv);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000759int tar_main(int argc, char **argv)
760{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000761 char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000762 archive_handle_t *tar_handle;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000763 char *base_dir = NULL;
Glenn L McGrathf66de642002-11-25 23:57:27 +0000764 const char *tar_filename = "-";
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000765 unsigned opt;
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000766 int verboseFlag = 0;
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000767#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
"Vladimir N. Oleynik"84e75112005-10-15 06:32:38 +0000768 llist_t *excludes = NULL;
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000769#endif
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000770
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000771 /* Initialise default values */
772 tar_handle = init_handle();
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000773 tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS
774 | ARCHIVE_PRESERVE_DATE
775 | ARCHIVE_EXTRACT_UNCONDITIONAL;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000776
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000777 /* Prepend '-' to the first argument if required */
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000778 opt_complementary = "--:" // first arg is options
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000779 "tt:vv:" // count -t,-v
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000780 "?:" // bail out with usage instead of error return
781 "X::T::" // cumulative lists
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000782#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
Denis Vlasenko30d7a342006-11-27 20:24:40 +0000783 "\xff::" // cumulative lists for --exclude
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000784#endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000785 USE_FEATURE_TAR_CREATE("c:") "t:x:" // at least one of these is reqd
786 USE_FEATURE_TAR_CREATE("c--tx:t--cx:x--ct") // mutually exclusive
787 SKIP_FEATURE_TAR_CREATE("t--x:x--t"); // mutually exclusive
Denis Vlasenkoc61852a2006-11-29 11:09:43 +0000788#if ENABLE_FEATURE_TAR_LONG_OPTIONS
Denis Vlasenkobdc88fd2007-07-23 17:14:14 +0000789 applet_long_options = tar_longopts;
Denis Vlasenkoc61852a2006-11-29 11:09:43 +0000790#endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000791 opt = getopt32(argc, argv,
792 "txC:f:Opvk"
793 USE_FEATURE_TAR_CREATE( "ch" )
794 USE_FEATURE_TAR_BZIP2( "j" )
795 USE_FEATURE_TAR_LZMA( "a" )
796 USE_FEATURE_TAR_FROM( "T:X:")
797 USE_FEATURE_TAR_GZIP( "z" )
798 USE_FEATURE_TAR_COMPRESS("Z" )
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000799 , &base_dir // -C dir
800 , &tar_filename // -f filename
801 USE_FEATURE_TAR_FROM(, &(tar_handle->accept)) // T
802 USE_FEATURE_TAR_FROM(, &(tar_handle->reject)) // X
803#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
804 , &excludes // --exclude
805#endif
806 , &verboseFlag // combined count for -t and -v
807 , &verboseFlag // combined count for -t and -v
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000808 );
Rob Landley60fe7bf2005-10-16 03:54:49 +0000809
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000810 if (verboseFlag) tar_handle->action_header = header_verbose_list;
811 if (verboseFlag == 1) tar_handle->action_header = header_list;
812
Denis Vlasenkob5963352006-11-26 01:46:59 +0000813 if (opt & OPT_EXTRACT)
Rob Landley60fe7bf2005-10-16 03:54:49 +0000814 tar_handle->action_data = data_extract_all;
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000815
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000816 if (opt & OPT_2STDOUT)
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000817 tar_handle->action_data = data_extract_to_stdout;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000818
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000819 if (opt & OPT_KEEP_OLD)
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000820 tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL;
Glenn L McGratheba86e22003-11-14 12:53:42 +0000821
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000822 if (opt & OPT_NOPRESERVE_OWN)
Rob Landleyf3d6c942005-10-27 22:49:08 +0000823 tar_handle->flags |= ARCHIVE_NOPRESERVE_OWN;
824
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000825 if (opt & OPT_NOPRESERVE_PERM)
Rob Landleyf3d6c942005-10-27 22:49:08 +0000826 tar_handle->flags |= ARCHIVE_NOPRESERVE_PERM;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000827
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000828 if (opt & OPT_GZIP)
Glenn L McGratheba86e22003-11-14 12:53:42 +0000829 get_header_ptr = get_header_tar_gz;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000830
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000831 if (opt & OPT_BZIP2)
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000832 get_header_ptr = get_header_tar_bz2;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000833
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000834 if (opt & OPT_LZMA)
Rob Landleyc1d69902006-01-20 18:28:50 +0000835 get_header_ptr = get_header_tar_lzma;
836
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000837 if (opt & OPT_COMPRESS)
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000838 get_header_ptr = get_header_tar_Z;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000839
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000840#if ENABLE_FEATURE_TAR_FROM
841 tar_handle->reject = append_file_list_to_list(tar_handle->reject);
842#if ENABLE_FEATURE_TAR_LONG_OPTIONS
843 /* Append excludes to reject */
844 while (excludes) {
845 llist_t *next = excludes->link;
846 excludes->link = tar_handle->reject;
847 tar_handle->reject = excludes;
848 excludes = next;
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000849 }
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000850#endif
851 tar_handle->accept = append_file_list_to_list(tar_handle->accept);
852#endif
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000853
Glenn L McGrath29833302002-10-06 23:25:23 +0000854 /* Check if we are reading from stdin */
"Vladimir N. Oleynik"84e75112005-10-15 06:32:38 +0000855 if (argv[optind] && *argv[optind] == '-') {
Glenn L McGrath29833302002-10-06 23:25:23 +0000856 /* Default is to read from stdin, so just skip to next arg */
Glenn L McGrath8132e932002-09-28 02:06:39 +0000857 optind++;
858 }
859
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000860 /* Setup an array of filenames to work with */
Eric Andersenaff114c2004-04-14 17:51:38 +0000861 /* TODO: This is the same as in ar, separate function ? */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000862 while (optind < argc) {
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000863 /* kill trailing '/' unless the string is just "/" */
864 char *cp = last_char_is(argv[optind], '/');
865 if (cp > argv[optind])
866 *cp = '\0';
Denis Vlasenko8d9f4952007-04-08 15:08:42 +0000867 llist_add_to_end(&tar_handle->accept, argv[optind]);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000868 optind++;
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000869 }
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000870
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000871 if (tar_handle->accept || tar_handle->reject)
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000872 tar_handle->filter = filter_accept_reject_list;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000873
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000874 /* Open the tar file */
875 {
876 FILE *tar_stream;
877 int flags;
878
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000879 if (opt & OPT_CREATE) {
Glenn L McGrathba496512003-11-20 09:06:10 +0000880 /* Make sure there is at least one file to tar up. */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000881 if (tar_handle->accept == NULL)
882 bb_error_msg_and_die("empty archive");
883
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000884 tar_stream = stdout;
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000885 /* Mimicking GNU tar 1.15.1: */
886 flags = O_WRONLY|O_CREAT|O_TRUNC;
887 /* was doing unlink; open(O_WRONLY|O_CREAT|O_EXCL); why? */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000888 } else {
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000889 tar_stream = stdin;
890 flags = O_RDONLY;
891 }
892
Denis Vlasenko9f739442006-12-16 23:49:13 +0000893 if (LONE_DASH(tar_filename)) {
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000894 tar_handle->src_fd = fileno(tar_stream);
Denis Vlasenko13858992006-10-08 12:49:22 +0000895 tar_handle->seek = seek_by_read;
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000896 } else {
Denis Vlasenkocf749bc2006-11-26 15:45:17 +0000897 tar_handle->src_fd = xopen(tar_filename, flags);
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000898 }
899 }
900
Bernhard Reutner-Fischerd9cf7ac2006-04-12 18:39:58 +0000901 if (base_dir)
Rob Landley86b4d642006-08-03 17:58:17 +0000902 xchdir(base_dir);
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000903
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000904#ifdef CHECK_FOR_CHILD_EXITCODE
905 /* We need to know whether child (gzip/bzip/etc) exits abnormally */
906 signal(SIGCHLD, handle_SIGCHLD);
907#endif
908
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000909 /* create an archive */
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000910 if (opt & OPT_CREATE) {
Rob Landleycc8885f2005-08-30 03:40:03 +0000911 int zipMode = 0;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000912 if (ENABLE_FEATURE_TAR_GZIP && get_header_ptr == get_header_tar_gz)
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000913 zipMode = 1;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000914 if (ENABLE_FEATURE_TAR_BZIP2 && get_header_ptr == get_header_tar_bz2)
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000915 zipMode = 2;
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000916 /* NB: writeTarFile() closes tar_handle->src_fd */
917 return writeTarFile(tar_handle->src_fd, verboseFlag, opt & OPT_DEREFERENCE,
Bernhard Reutner-Fischer18260d52006-04-18 14:17:49 +0000918 tar_handle->accept,
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000919 tar_handle->reject, zipMode);
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000920 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000921
Denis Vlasenkob8a8e602006-11-24 14:59:45 +0000922 while (get_header_ptr(tar_handle) == EXIT_SUCCESS)
923 /* nothing */;
924
925 /* Check that every file that should have been extracted was */
926 while (tar_handle->accept) {
927 if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
928 && !find_list_entry(tar_handle->passed, tar_handle->accept->data)
929 ) {
930 bb_error_msg_and_die("%s: not found in archive",
931 tar_handle->accept->data);
932 }
933 tar_handle->accept = tar_handle->accept->link;
934 }
935 if (ENABLE_FEATURE_CLEAN_UP /* && tar_handle->src_fd != STDIN_FILENO */)
Glenn L McGrath8132e932002-09-28 02:06:39 +0000936 close(tar_handle->src_fd);
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000937
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000938 return EXIT_SUCCESS;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000939}