blob: 79979b05f437f84316f6db50e1b7830da14b34f0 [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 Vlasenko218f2f42007-01-24 22:02:01 +000028#include "busybox.h"
29#include "unarchive.h"
Eric Andersencc8ed391999-10-05 16:24:54 +000030
Denis Vlasenkod031ffa2006-11-24 21:54:44 +000031#if ENABLE_FEATURE_TAR_CREATE
Eric Andersencc8ed391999-10-05 16:24:54 +000032
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000033/* Tar file constants */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000034
Rob Landley3ee6c242005-10-15 03:06:21 +000035#define TAR_BLOCK_SIZE 512
Eric Andersencc8ed391999-10-05 16:24:54 +000036
Erik Andersen298854f2000-03-23 01:09:18 +000037/* POSIX tar Header Block, from POSIX 1003.1-1990 */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +000038#define NAME_SIZE 100
39#define NAME_SIZE_STR "100"
Denis Vlasenko218f2f42007-01-24 22:02:01 +000040typedef struct TarHeader TarHeader;
Denis Vlasenko376ce1e2006-11-24 14:51:01 +000041struct TarHeader { /* byte offset */
42 char name[NAME_SIZE]; /* 0-99 */
43 char mode[8]; /* 100-107 */
44 char uid[8]; /* 108-115 */
45 char gid[8]; /* 116-123 */
46 char size[12]; /* 124-135 */
47 char mtime[12]; /* 136-147 */
48 char chksum[8]; /* 148-155 */
49 char typeflag; /* 156-156 */
50 char linkname[NAME_SIZE]; /* 157-256 */
51 char magic[6]; /* 257-262 */
52 char version[2]; /* 263-264 */
53 char uname[32]; /* 265-296 */
54 char gname[32]; /* 297-328 */
55 char devmajor[8]; /* 329-336 */
56 char devminor[8]; /* 337-344 */
57 char prefix[155]; /* 345-499 */
58 char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
Erik Andersen298854f2000-03-23 01:09:18 +000059};
Eric Andersencc8ed391999-10-05 16:24:54 +000060
Eric Andersen3d957c82000-12-07 00:34:58 +000061/*
Denis Vlasenko4fbb5842006-11-24 14:55:23 +000062** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
Eric Andersen3d957c82000-12-07 00:34:58 +000063** the only functions that deal with the HardLinkInfo structure.
64** Even these functions use the xxxHardLinkInfo() functions.
65*/
66typedef struct HardLinkInfo HardLinkInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +000067struct HardLinkInfo {
68 HardLinkInfo *next; /* Next entry in list */
Rob Landley60fe7bf2005-10-16 03:54:49 +000069 dev_t dev; /* Device number */
70 ino_t ino; /* Inode number */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000071 short linkCount; /* (Hard) Link Count */
72 char name[1]; /* Start of filename (must be last) */
Eric Andersen3d957c82000-12-07 00:34:58 +000073};
74
Erik Andersen68a9ea42000-04-04 18:39:50 +000075/* Some info to be carried along when creating a new tarball */
Denis Vlasenko218f2f42007-01-24 22:02:01 +000076typedef struct TarBallInfo TarBallInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +000077struct TarBallInfo {
Rob Landley60fe7bf2005-10-16 03:54:49 +000078 int tarFd; /* Open-for-write file descriptor
Tim Rikerc1ef7bd2006-01-25 00:08:53 +000079 for the tarball */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000080 struct stat statBuf; /* Stat info for the tarball, letting
81 us know the inode and device that the
Eric Andersenc7bda1c2004-03-15 08:29:22 +000082 tarball lives, so we can avoid trying
Glenn L McGratha0ee8812002-08-22 13:44:08 +000083 to include the tarball into itself */
Rob Landley60fe7bf2005-10-16 03:54:49 +000084 int verboseFlag; /* Whether to print extra stuff or not */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +000085 const llist_t *excludeList; /* List of files to not include */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000086 HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
87 HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
Erik Andersen68a9ea42000-04-04 18:39:50 +000088};
Erik Andersen68a9ea42000-04-04 18:39:50 +000089
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000090/* A nice enum with all the possible tar file content types */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000091enum TarFileType {
92 REGTYPE = '0', /* regular file */
93 REGTYPE0 = '\0', /* regular file (ancient bug compat) */
94 LNKTYPE = '1', /* hard link */
95 SYMTYPE = '2', /* symbolic link */
96 CHRTYPE = '3', /* character special */
97 BLKTYPE = '4', /* block special */
98 DIRTYPE = '5', /* directory */
99 FIFOTYPE = '6', /* FIFO special */
100 CONTTYPE = '7', /* reserved */
101 GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
102 GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000103};
104typedef enum TarFileType TarFileType;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000105
Eric Andersen3d957c82000-12-07 00:34:58 +0000106/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
Rob Landley88621d72006-08-29 19:41:06 +0000107static void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
Glenn L McGrathf66de642002-11-25 23:57:27 +0000108 struct stat *statbuf,
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000109 const char *fileName)
Eric Andersen3d957c82000-12-07 00:34:58 +0000110{
111 /* Note: hlInfoHeadPtr can never be NULL! */
112 HardLinkInfo *hlInfo;
113
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000114 hlInfo = xmalloc(sizeof(HardLinkInfo) + strlen(fileName));
Glenn L McGrathf66de642002-11-25 23:57:27 +0000115 hlInfo->next = *hlInfoHeadPtr;
116 *hlInfoHeadPtr = hlInfo;
117 hlInfo->dev = statbuf->st_dev;
118 hlInfo->ino = statbuf->st_ino;
119 hlInfo->linkCount = statbuf->st_nlink;
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000120 strcpy(hlInfo->name, fileName);
Eric Andersen3d957c82000-12-07 00:34:58 +0000121}
122
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000123static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
Eric Andersen3d957c82000-12-07 00:34:58 +0000124{
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000125 HardLinkInfo *hlInfo;
126 HardLinkInfo *hlInfoNext;
Eric Andersen3d957c82000-12-07 00:34:58 +0000127
128 if (hlInfoHeadPtr) {
129 hlInfo = *hlInfoHeadPtr;
130 while (hlInfo) {
131 hlInfoNext = hlInfo->next;
132 free(hlInfo);
133 hlInfo = hlInfoNext;
134 }
135 *hlInfoHeadPtr = NULL;
136 }
Eric Andersen3d957c82000-12-07 00:34:58 +0000137}
138
139/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
Rob Landley88621d72006-08-29 19:41:06 +0000140static HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
Eric Andersen3d957c82000-12-07 00:34:58 +0000141{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000142 while (hlInfo) {
Glenn L McGrathf66de642002-11-25 23:57:27 +0000143 if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
Eric Andersen3d957c82000-12-07 00:34:58 +0000144 break;
145 hlInfo = hlInfo->next;
146 }
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000147 return hlInfo;
Eric Andersen3d957c82000-12-07 00:34:58 +0000148}
149
Erik Andersen6acaa402000-03-26 14:03:20 +0000150/* Put an octal string into the specified buffer.
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000151 * The number is zero padded and possibly null terminated.
Denis Vlasenko87cd4a82006-11-25 23:47:32 +0000152 * Stores low-order bits only if whole value does not fit. */
153static void putOctal(char *cp, int len, off_t value)
Erik Andersen6acaa402000-03-26 14:03:20 +0000154{
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000155 char tempBuffer[sizeof(off_t)*3+1];
Erik Andersen5661fe02000-04-05 01:00:52 +0000156 char *tempString = tempBuffer;
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000157 int width;
Erik Andersen6acaa402000-03-26 14:03:20 +0000158
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000159 width = sprintf(tempBuffer, "%0*"OFF_FMT"o", len, value);
160 tempString += (width - len);
Erik Andersen6acaa402000-03-26 14:03:20 +0000161
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000162 /* If string has leading zeroes, we can drop one */
163 /* and field will have trailing '\0' */
164 /* (increases chances of compat with other tars) */
165 if (tempString[0] == '0')
166 tempString++;
Erik Andersen6acaa402000-03-26 14:03:20 +0000167
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000168 /* Copy the string to the field */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000169 memcpy(cp, tempString, len);
Erik Andersen6acaa402000-03-26 14:03:20 +0000170}
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000171#define PUT_OCTAL(a, b) putOctal((a), sizeof(a), (b))
172
173static void chksum_and_xwrite(int fd, struct TarHeader* hp)
174{
Denis Vlasenkodcbd51d2007-03-03 20:06:59 +0000175 /* POSIX says that checksum is done on unsigned bytes
Denis Vlasenko940494f2007-03-04 18:09:50 +0000176 * (Sun and HP-UX gets it wrong... more details in
Denis Vlasenkodcbd51d2007-03-03 20:06:59 +0000177 * GNU tar source) */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000178 const unsigned char *cp;
179 int chksum, size;
180
181 strcpy(hp->magic, "ustar ");
182
183 /* Calculate and store the checksum (i.e., the sum of all of the bytes of
184 * the header). The checksum field must be filled with blanks for the
185 * calculation. The checksum field is formatted differently from the
186 * other fields: it has 6 digits, a null, then a space -- rather than
187 * digits, followed by a null like the other fields... */
188 memset(hp->chksum, ' ', sizeof(hp->chksum));
189 cp = (const unsigned char *) hp;
190 chksum = 0;
191 size = sizeof(*hp);
192 do { chksum += *cp++; } while (--size);
193 putOctal(hp->chksum, sizeof(hp->chksum)-1, chksum);
194
195 /* Now write the header out to disk */
196 xwrite(fd, hp, sizeof(*hp));
197}
198
199#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
200static void writeLongname(int fd, int type, const char *name, int dir)
201{
202 static const struct {
203 char mode[8]; /* 100-107 */
204 char uid[8]; /* 108-115 */
205 char gid[8]; /* 116-123 */
206 char size[12]; /* 124-135 */
207 char mtime[12]; /* 136-147 */
208 } prefilled = {
209 "0000000",
210 "0000000",
211 "0000000",
212 "00000000000",
213 "00000000000",
214 };
215 struct TarHeader header;
216 int size;
217
218 dir = !!dir; /* normalize: 0/1 */
219 size = strlen(name) + 1 + dir; /* GNU tar uses strlen+1 */
220 /* + dir: account for possible '/' */
221
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000222 memset(&header, 0, sizeof(header));
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000223 strcpy(header.name, "././@LongLink");
224 memcpy(header.mode, prefilled.mode, sizeof(prefilled));
225 PUT_OCTAL(header.size, size);
226 header.typeflag = type;
227 chksum_and_xwrite(fd, &header);
228
229 /* Write filename[/] and pad the block. */
230 /* dir=0: writes 'name<NUL>', pads */
231 /* dir=1: writes 'name', writes '/<NUL>', pads */
232 dir *= 2;
233 xwrite(fd, name, size - dir);
234 xwrite(fd, "/", dir);
235 size = (-size) & (TAR_BLOCK_SIZE-1);
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000236 memset(&header, 0, size);
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000237 xwrite(fd, &header, size);
238}
239#endif
Erik Andersen6acaa402000-03-26 14:03:20 +0000240
Erik Andersen68a9ea42000-04-04 18:39:50 +0000241/* Write out a tar header for the specified file/directory/whatever */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000242void BUG_tar_header_size(void);
Rob Landley88621d72006-08-29 19:41:06 +0000243static int writeTarHeader(struct TarBallInfo *tbInfo,
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000244 const char *header_name, const char *fileName, struct stat *statbuf)
Erik Andersen6acaa402000-03-26 14:03:20 +0000245{
Erik Andersen5661fe02000-04-05 01:00:52 +0000246 struct TarHeader header;
Erik Andersen3364d782000-03-28 00:58:14 +0000247
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000248 if (sizeof(header) != 512)
249 BUG_tar_header_size();
250
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000251 memset(&header, 0, sizeof(struct TarHeader));
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000252
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000253 strncpy(header.name, header_name, sizeof(header.name));
Erik Andersenecd51242000-04-08 03:08:21 +0000254
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000255 /* POSIX says to mask mode with 07777. */
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000256 PUT_OCTAL(header.mode, statbuf->st_mode & 07777);
257 PUT_OCTAL(header.uid, statbuf->st_uid);
258 PUT_OCTAL(header.gid, statbuf->st_gid);
Denis Vlasenkob8a8e602006-11-24 14:59:45 +0000259 memset(header.size, '0', sizeof(header.size)-1); /* Regular file size is handled later */
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000260 PUT_OCTAL(header.mtime, statbuf->st_mtime);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000261
Denis Vlasenkoc50f3702006-11-24 14:57:31 +0000262 /* Enter the user and group names */
263 safe_strncpy(header.uname, get_cached_username(statbuf->st_uid), sizeof(header.uname));
264 safe_strncpy(header.gname, get_cached_groupname(statbuf->st_gid), sizeof(header.gname));
Erik Andersen5661fe02000-04-05 01:00:52 +0000265
Eric Andersen3d957c82000-12-07 00:34:58 +0000266 if (tbInfo->hlInfo) {
267 /* This is a hard link */
268 header.typeflag = LNKTYPE;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000269 strncpy(header.linkname, tbInfo->hlInfo->name,
270 sizeof(header.linkname));
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000271#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
272 /* Write out long linkname if needed */
273 if (header.linkname[sizeof(header.linkname)-1])
274 writeLongname(tbInfo->tarFd, GNULONGLINK,
275 tbInfo->hlInfo->name, 0);
276#endif
Eric Andersen3d957c82000-12-07 00:34:58 +0000277 } else if (S_ISLNK(statbuf->st_mode)) {
Denis Vlasenko6ca04442007-02-11 16:19:28 +0000278 char *lpath = xmalloc_readlink_or_warn(fileName);
279 if (!lpath)
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000280 return FALSE;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000281 header.typeflag = SYMTYPE;
282 strncpy(header.linkname, lpath, sizeof(header.linkname));
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000283#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
284 /* Write out long linkname if needed */
285 if (header.linkname[sizeof(header.linkname)-1])
286 writeLongname(tbInfo->tarFd, GNULONGLINK, lpath, 0);
287#else
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000288 /* If it is larger than 100 bytes, bail out */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000289 if (header.linkname[sizeof(header.linkname)-1]) {
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000290 free(lpath);
291 bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
292 return FALSE;
293 }
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000294#endif
Mark Whitley8a633262001-04-30 18:17:00 +0000295 free(lpath);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000296 } else if (S_ISDIR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000297 header.typeflag = DIRTYPE;
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000298 /* Append '/' only if there is a space for it */
299 if (!header.name[sizeof(header.name)-1])
300 header.name[strlen(header.name)] = '/';
Erik Andersen68a9ea42000-04-04 18:39:50 +0000301 } else if (S_ISCHR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000302 header.typeflag = CHRTYPE;
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000303 PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
304 PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000305 } else if (S_ISBLK(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000306 header.typeflag = BLKTYPE;
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000307 PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
308 PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000309 } else if (S_ISFIFO(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000310 header.typeflag = FIFOTYPE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000311 } else if (S_ISREG(statbuf->st_mode)) {
Denis Vlasenko87cd4a82006-11-25 23:47:32 +0000312 if (sizeof(statbuf->st_size) > 4
313 && statbuf->st_size > (off_t)0777777777777LL
Denis Vlasenkof2408e62006-11-25 14:48:09 +0000314 ) {
315 bb_error_msg_and_die("cannot store file '%s' "
316 "of size %"OFF_FMT"d, aborting",
317 fileName, statbuf->st_size);
318 }
Denis Vlasenko87cd4a82006-11-25 23:47:32 +0000319 header.typeflag = REGTYPE;
320 PUT_OCTAL(header.size, statbuf->st_size);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000321 } else {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000322 bb_error_msg("%s: unknown file type", fileName);
323 return FALSE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000324 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000325
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000326#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
327 /* Write out long name if needed */
328 /* (we, like GNU tar, output long linkname *before* long name) */
329 if (header.name[sizeof(header.name)-1])
330 writeLongname(tbInfo->tarFd, GNULONGNAME,
331 header_name, S_ISDIR(statbuf->st_mode));
332#endif
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000333
Erik Andersen5661fe02000-04-05 01:00:52 +0000334 /* Now write the header out to disk */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000335 chksum_and_xwrite(tbInfo->tarFd, &header);
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000336
Erik Andersen5661fe02000-04-05 01:00:52 +0000337 /* Now do the verbose thing (or not) */
Robert Grieblf2f26e72002-07-23 22:05:47 +0000338 if (tbInfo->verboseFlag) {
Eric Andersenfdd51032000-08-02 18:48:26 +0000339 FILE *vbFd = stdout;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000340
Eric Andersen70060d22004-03-27 10:02:48 +0000341 if (tbInfo->tarFd == STDOUT_FILENO) /* If the archive goes to stdout, verbose to stderr */
Eric Andersenfdd51032000-08-02 18:48:26 +0000342 vbFd = stderr;
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000343 /* GNU "tar cvvf" prints "extended" listing a-la "ls -l" */
344 /* We don't have such excesses here: for us "v" == "vv" */
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000345 /* '/' is probably a GNUism */
346 fprintf(vbFd, "%s%s\n", header_name,
347 S_ISDIR(statbuf->st_mode) ? "/" : "");
Eric Andersenfdd51032000-08-02 18:48:26 +0000348 }
Erik Andersen3364d782000-03-28 00:58:14 +0000349
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000350 return TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +0000351}
352
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000353#if ENABLE_FEATURE_TAR_FROM
Rob Landley88621d72006-08-29 19:41:06 +0000354static int exclude_file(const llist_t *excluded_files, const char *file)
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000355{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000356 while (excluded_files) {
357 if (excluded_files->data[0] == '/') {
358 if (fnmatch(excluded_files->data, file,
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000359 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
360 return 1;
361 } else {
362 const char *p;
363
364 for (p = file; p[0] != '\0'; p++) {
365 if ((p == file || p[-1] == '/') && p[0] != '/' &&
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000366 fnmatch(excluded_files->data, p,
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000367 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
368 return 1;
369 }
370 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000371 excluded_files = excluded_files->link;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000372 }
373
374 return 0;
375}
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000376#else
"Vladimir N. Oleynik"a62b0e72005-12-06 12:20:57 +0000377#define exclude_file(excluded_files, file) 0
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000378#endif
Erik Andersen3364d782000-03-28 00:58:14 +0000379
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000380static int writeFileToTarball(const char *fileName, struct stat *statbuf,
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000381 void *userData, int depth ATTRIBUTE_UNUSED)
Erik Andersen3364d782000-03-28 00:58:14 +0000382{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000383 struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
Matt Kraaie80a2632000-12-19 20:45:49 +0000384 const char *header_name;
Rob Landleye5695532006-01-09 03:07:44 +0000385 int inputFileFd = -1;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000386
Eric Andersen3d957c82000-12-07 00:34:58 +0000387 /*
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000388 * Check to see if we are dealing with a hard link.
389 * If so -
390 * Treat the first occurance of a given dev/inode as a file while
391 * treating any additional occurances as hard links. This is done
392 * by adding the file information to the HardLinkInfo linked list.
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000393 */
Eric Andersen3d957c82000-12-07 00:34:58 +0000394 tbInfo->hlInfo = NULL;
395 if (statbuf->st_nlink > 1) {
Glenn L McGrathf66de642002-11-25 23:57:27 +0000396 tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
Eric Andersen3d957c82000-12-07 00:34:58 +0000397 if (tbInfo->hlInfo == NULL)
Glenn L McGrathf66de642002-11-25 23:57:27 +0000398 addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
Eric Andersen3d957c82000-12-07 00:34:58 +0000399 }
400
Erik Andersen68a9ea42000-04-04 18:39:50 +0000401 /* It is against the rules to archive a socket */
402 if (S_ISSOCK(statbuf->st_mode)) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000403 bb_error_msg("%s: socket ignored", fileName);
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000404 return TRUE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000405 }
406
407 /* It is a bad idea to store the archive we are in the process of creating,
408 * so check the device and inode to be sure that this particular file isn't
409 * the new tarball */
410 if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000411 tbInfo->statBuf.st_ino == statbuf->st_ino) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000412 bb_error_msg("%s: file is the archive; skipping", fileName);
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000413 return TRUE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000414 }
415
Matt Kraaie80a2632000-12-19 20:45:49 +0000416 header_name = fileName;
417 while (header_name[0] == '/') {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000418 static int alreadyWarned = FALSE;
419
420 if (alreadyWarned == FALSE) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000421 bb_error_msg("removing leading '/' from member names");
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000422 alreadyWarned = TRUE;
Matt Kraaia1f97752000-12-19 06:24:08 +0000423 }
Matt Kraaie80a2632000-12-19 20:45:49 +0000424 header_name++;
Matt Kraaia1f97752000-12-19 06:24:08 +0000425 }
426
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000427#if !ENABLE_FEATURE_TAR_GNU_EXTENSIONS
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000428 if (strlen(fileName) >= NAME_SIZE) {
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000429 bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000430 return TRUE;
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000431 }
Denis Vlasenko7725d0f2006-11-25 23:56:50 +0000432#endif
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000433
Matt Kraaie80a2632000-12-19 20:45:49 +0000434 if (header_name[0] == '\0')
Matt Kraaia1f97752000-12-19 06:24:08 +0000435 return TRUE;
436
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000437 if (exclude_file(tbInfo->excludeList, header_name))
Matt Kraaibe7499c2001-01-03 17:22:10 +0000438 return SKIP;
Matt Kraaia1f97752000-12-19 06:24:08 +0000439
Rob Landleye5695532006-01-09 03:07:44 +0000440 /* Is this a regular file? */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000441 if (tbInfo->hlInfo == NULL && S_ISREG(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000442 /* open the file we want to archive, and make sure all is well */
Denis Vlasenko50f7f442007-04-11 23:20:53 +0000443 inputFileFd = open_or_warn(fileName, O_RDONLY);
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000444 if (inputFileFd < 0) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000445 return FALSE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000446 }
Rob Landleye5695532006-01-09 03:07:44 +0000447 }
448
449 /* Add an entry to the tarball */
450 if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000451 return FALSE;
Rob Landleye5695532006-01-09 03:07:44 +0000452 }
453
454 /* If it was a regular file, write out the body */
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000455 if (inputFileFd >= 0) {
Denis Vlasenko714701c2006-12-22 00:21:07 +0000456 size_t readSize;
Denis Vlasenko50f7f442007-04-11 23:20:53 +0000457 /* Write the file to the archive. */
Denis Vlasenko714701c2006-12-22 00:21:07 +0000458 /* We record size into header first, */
459 /* and then write out file. If file shrinks in between, */
460 /* tar will be corrupted. So we don't allow for that. */
461 /* NB: GNU tar 1.16 warns and pads with zeroes */
462 /* or even seeks back and updates header */
463 bb_copyfd_exact_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
464 ////off_t readSize;
465 ////readSize = bb_copyfd_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
466 ////if (readSize != statbuf->st_size && readSize >= 0) {
467 //// bb_error_msg_and_die("short read from %s, aborting", fileName);
468 ////}
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000469
Denis Vlasenko4fbb5842006-11-24 14:55:23 +0000470 /* Check that file did not grow in between? */
Denis Vlasenko714701c2006-12-22 00:21:07 +0000471 /* if (safe_read(inputFileFd, 1) == 1) warn but continue? */
472
Rob Landleye5695532006-01-09 03:07:44 +0000473 close(inputFileFd);
Glenn L McGrath7ffe1332003-11-21 22:24:57 +0000474
Erik Andersen5661fe02000-04-05 01:00:52 +0000475 /* Pad the file up to the tar block size */
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000476 /* (a few tricks here in the name of code size) */
Denis Vlasenko714701c2006-12-22 00:21:07 +0000477 readSize = (-(int)statbuf->st_size) & (TAR_BLOCK_SIZE-1);
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000478 memset(bb_common_bufsiz1, 0, readSize);
Rob Landley1bfca7b2006-09-10 03:20:37 +0000479 xwrite(tbInfo->tarFd, bb_common_bufsiz1, readSize);
Erik Andersen5661fe02000-04-05 01:00:52 +0000480 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000481
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000482 return TRUE;
Erik Andersen6acaa402000-03-26 14:03:20 +0000483}
484
Rob Landley88621d72006-08-29 19:41:06 +0000485static int writeTarFile(const int tar_fd, const int verboseFlag,
Glenn L McGrath303e9892004-01-25 05:48:28 +0000486 const unsigned long dereferenceFlag, const llist_t *include,
487 const llist_t *exclude, const int gzip)
Erik Andersen6acaa402000-03-26 14:03:20 +0000488{
Robert Grieblf2f26e72002-07-23 22:05:47 +0000489 pid_t gzipPid = 0;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000490 int errorFlag = FALSE;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000491 struct TarBallInfo tbInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000492
Eric Andersen3d957c82000-12-07 00:34:58 +0000493 tbInfo.hlInfoHead = NULL;
Erik Andersen3364d782000-03-28 00:58:14 +0000494
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000495 fchmod(tar_fd, 0644);
496 tbInfo.tarFd = tar_fd;
497 tbInfo.verboseFlag = verboseFlag;
Robert Grieblf2f26e72002-07-23 22:05:47 +0000498
Erik Andersen68a9ea42000-04-04 18:39:50 +0000499 /* Store the stat info for the tarball's file, so
500 * can avoid including the tarball into itself.... */
501 if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000502 bb_perror_msg_and_die("cannot stat tar file");
Erik Andersen6acaa402000-03-26 14:03:20 +0000503
Rob Landleycc8885f2005-08-30 03:40:03 +0000504 if ((ENABLE_FEATURE_TAR_GZIP || ENABLE_FEATURE_TAR_BZIP2) && gzip) {
505 int gzipDataPipe[2] = { -1, -1 };
506 int gzipStatusPipe[2] = { -1, -1 };
507 volatile int vfork_exec_errno = 0;
Denis Vlasenkoa41fdf32007-01-29 22:51:00 +0000508 const char *zip_exec = (gzip == 1) ? "gzip" : "bzip2";
Rob Landleycc8885f2005-08-30 03:40:03 +0000509
Rob Landley60fe7bf2005-10-16 03:54:49 +0000510 if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0)
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000511 bb_perror_msg_and_die("pipe");
Robert Grieblf2f26e72002-07-23 22:05:47 +0000512
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000513 signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
Robert Grieblf2f26e72002-07-23 22:05:47 +0000514
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000515#if defined(__GNUC__) && __GNUC__
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000516 /* Avoid vfork clobbering */
517 (void) &include;
518 (void) &errorFlag;
519 (void) &zip_exec;
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000520#endif
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000521
Glenn L McGrathf66de642002-11-25 23:57:27 +0000522 gzipPid = vfork();
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000523
524 if (gzipPid == 0) {
525 dup2(gzipDataPipe[0], 0);
526 close(gzipDataPipe[1]);
527
Denis Vlasenkob8a8e602006-11-24 14:59:45 +0000528 dup2(tbInfo.tarFd, 1);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000529
530 close(gzipStatusPipe[0]);
Bernhard Reutner-Fischer126da9e2005-12-12 11:20:39 +0000531 fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows success */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000532
Denis Vlasenko1d76f432007-02-06 01:20:12 +0000533 BB_EXECLP(zip_exec, zip_exec, "-f", NULL);
Glenn L McGrathf66de642002-11-25 23:57:27 +0000534 vfork_exec_errno = errno;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000535
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000536 close(gzipStatusPipe[1]);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000537 exit(-1);
538 } else if (gzipPid > 0) {
539 close(gzipDataPipe[0]);
540 close(gzipStatusPipe[1]);
541
542 while (1) {
Robert Grieblf2f26e72002-07-23 22:05:47 +0000543 char buf;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000544
Rob Landley53437472006-07-16 08:14:35 +0000545 int n = full_read(gzipStatusPipe[0], &buf, 1);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000546
Glenn L McGrathf66de642002-11-25 23:57:27 +0000547 if (n == 0 && vfork_exec_errno != 0) {
548 errno = vfork_exec_errno;
Denis Vlasenkoea620772006-10-14 02:23:43 +0000549 bb_perror_msg_and_die("cannot exec %s", zip_exec);
Glenn L McGrathf66de642002-11-25 23:57:27 +0000550 } else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000551 continue; /* try it again */
552 break;
Robert Grieblf2f26e72002-07-23 22:05:47 +0000553 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000554 close(gzipStatusPipe[0]);
555
556 tbInfo.tarFd = gzipDataPipe[1];
Rob Landley60fe7bf2005-10-16 03:54:49 +0000557 } else bb_perror_msg_and_die("vfork gzip");
Robert Grieblf2f26e72002-07-23 22:05:47 +0000558 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000559
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000560 tbInfo.excludeList = exclude;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000561
Erik Andersen6acaa402000-03-26 14:03:20 +0000562 /* Read the directory/files and iterate over them one at a time */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000563 while (include) {
Denis Vlasenkobbd695d2007-04-08 10:52:28 +0000564 if (!recursive_action(include->data, ACTION_RECURSE |
565 (dereferenceFlag ? ACTION_FOLLOWLINKS : 0),
Bernhard Reutner-Fischer3e816c12007-03-29 10:30:50 +0000566 writeFileToTarball, writeFileToTarball, &tbInfo, 0))
Rob Landley60fe7bf2005-10-16 03:54:49 +0000567 {
Erik Andersen68a9ea42000-04-04 18:39:50 +0000568 errorFlag = TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +0000569 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000570 include = include->link;
Erik Andersen6acaa402000-03-26 14:03:20 +0000571 }
Erik Andersen5661fe02000-04-05 01:00:52 +0000572 /* Write two empty blocks to the end of the archive */
Bernhard Reutner-Fischer6f0540e2006-12-12 11:50:44 +0000573 memset(bb_common_bufsiz1, 0, 2*TAR_BLOCK_SIZE);
Rob Landley1bfca7b2006-09-10 03:20:37 +0000574 xwrite(tbInfo.tarFd, bb_common_bufsiz1, 2*TAR_BLOCK_SIZE);
Erik Andersen0817d132000-04-09 15:17:40 +0000575
576 /* To be pedantically correct, we would check if the tarball
Eric Andersen3c5ee9a2000-11-14 22:15:48 +0000577 * is smaller than 20 tar blocks, and pad it if it was smaller,
Erik Andersen0817d132000-04-09 15:17:40 +0000578 * but that isn't necessary for GNU tar interoperability, and
579 * so is considered a waste of space */
580
Rob Landley1a781032005-12-16 21:33:10 +0000581 /* Close so the child process (if any) will exit */
582 close(tbInfo.tarFd);
583
Erik Andersen68a9ea42000-04-04 18:39:50 +0000584 /* Hang up the tools, close up shop, head home */
Rob Landley1a781032005-12-16 21:33:10 +0000585 if (ENABLE_FEATURE_CLEAN_UP)
Rob Landley60fe7bf2005-10-16 03:54:49 +0000586 freeHardLinkInfo(&tbInfo.hlInfoHead);
Rob Landley60fe7bf2005-10-16 03:54:49 +0000587
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000588 if (errorFlag)
Denis Vlasenkoe1a0d482006-10-20 13:28:22 +0000589 bb_error_msg("error exit delayed from previous errors");
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000590
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000591 if (gzipPid) {
592 int status;
593 if (waitpid(gzipPid, &status, 0) == -1)
594 bb_perror_msg("waitpid");
595 else if (!WIFEXITED(status) || WEXITSTATUS(status))
596 /* gzip was killed or has exited with nonzero! */
597 errorFlag = TRUE;
598 }
599 return errorFlag;
Erik Andersen6acaa402000-03-26 14:03:20 +0000600}
Rob Landley60fe7bf2005-10-16 03:54:49 +0000601#else
602int writeTarFile(const int tar_fd, const int verboseFlag,
603 const unsigned long dereferenceFlag, const llist_t *include,
604 const llist_t *exclude, const int gzip);
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000605#endif /* FEATURE_TAR_CREATE */
Erik Andersen6acaa402000-03-26 14:03:20 +0000606
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000607#if ENABLE_FEATURE_TAR_FROM
Eric Andersen27cb6842003-06-26 09:07:59 +0000608static llist_t *append_file_list_to_list(llist_t *list)
Glenn L McGrathd642a672001-10-13 06:54:45 +0000609{
Eric Andersen27cb6842003-06-26 09:07:59 +0000610 FILE *src_stream;
611 llist_t *cur = list;
612 llist_t *tmp;
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000613 char *line;
Eric Andersen27cb6842003-06-26 09:07:59 +0000614 llist_t *newlist = NULL;
615
Rob Landley60fe7bf2005-10-16 03:54:49 +0000616 while (cur) {
Rob Landley86b4d642006-08-03 17:58:17 +0000617 src_stream = xfopen(cur->data, "r");
Eric Andersen27cb6842003-06-26 09:07:59 +0000618 tmp = cur;
619 cur = cur->link;
620 free(tmp);
Denis Vlasenko2d5ca602006-10-12 22:43:20 +0000621 while ((line = xmalloc_getline(src_stream)) != NULL) {
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000622 /* kill trailing '/' unless the string is just "/" */
623 char *cp = last_char_is(line, '/');
624 if (cp > line)
625 *cp = '\0';
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000626 llist_add_to(&newlist, line);
Denis Vlasenko314908d2006-09-03 14:04:33 +0000627 }
Rob Landley60fe7bf2005-10-16 03:54:49 +0000628 fclose(src_stream);
Eric Andersen27cb6842003-06-26 09:07:59 +0000629 }
630 return newlist;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000631}
Rob Landley60fe7bf2005-10-16 03:54:49 +0000632#else
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000633#define append_file_list_to_list(x) 0
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000634#endif
Erik Andersen6acaa402000-03-26 14:03:20 +0000635
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000636#if ENABLE_FEATURE_TAR_COMPRESS
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000637static char get_header_tar_Z(archive_handle_t *archive_handle)
638{
Denis Vlasenkoe1a0d482006-10-20 13:28:22 +0000639 /* Can't lseek over pipes */
Denis Vlasenko13858992006-10-08 12:49:22 +0000640 archive_handle->seek = seek_by_read;
Eric Andersen27cb6842003-06-26 09:07:59 +0000641
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000642 /* do the decompression, and cleanup */
Denis Vlasenkocf30cc82006-11-24 14:53:18 +0000643 if (xread_char(archive_handle->src_fd) != 0x1f
644 || xread_char(archive_handle->src_fd) != 0x9d
645 ) {
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000646 bb_error_msg_and_die("invalid magic");
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000647 }
648
649 archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress);
650 archive_handle->offset = 0;
Denis Vlasenko0c45bb232006-09-09 12:49:03 +0000651 while (get_header_tar(archive_handle) == EXIT_SUCCESS)
652 /* nothing */;
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000653
654 /* Can only do one file at a time */
Denis Vlasenkoe1a0d482006-10-20 13:28:22 +0000655 return EXIT_FAILURE;
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000656}
Rob Landley60fe7bf2005-10-16 03:54:49 +0000657#else
Denis Vlasenko218f2f42007-01-24 22:02:01 +0000658#define get_header_tar_Z NULL
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000659#endif
660
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000661#ifdef CHECK_FOR_CHILD_EXITCODE
662/* Looks like it isn't needed - tar detects malformed (truncated)
663 * archive if e.g. bunzip2 fails */
664static int child_error;
665
666static void handle_SIGCHLD(int status)
667{
668 /* Actually, 'status' is a signo. We reuse it for other needs */
669
670 /* Wait for any child without blocking */
671 if (waitpid(-1, &status, WNOHANG) < 0)
672 /* wait failed?! I'm confused... */
673 return;
674
675 if (WIFEXITED(status) && WEXITSTATUS(status)==0)
676 /* child exited with 0 */
677 return;
Denis Vlasenkof7996f32007-01-11 17:20:00 +0000678 /* Cannot happen?
Denis Vlasenko51742f42007-04-12 00:32:05 +0000679 if (!WIFSIGNALED(status) && !WIFEXITED(status)) return; */
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000680 child_error = 1;
681}
682#endif
683
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000684enum {
685 OPTBIT_KEEP_OLD = 7,
686 USE_FEATURE_TAR_CREATE( OPTBIT_CREATE ,)
687 USE_FEATURE_TAR_CREATE( OPTBIT_DEREFERENCE ,)
688 USE_FEATURE_TAR_BZIP2( OPTBIT_BZIP2 ,)
689 USE_FEATURE_TAR_LZMA( OPTBIT_LZMA ,)
690 USE_FEATURE_TAR_FROM( OPTBIT_INCLUDE_FROM,)
691 USE_FEATURE_TAR_FROM( OPTBIT_EXCLUDE_FROM,)
692 USE_FEATURE_TAR_GZIP( OPTBIT_GZIP ,)
693 USE_FEATURE_TAR_COMPRESS(OPTBIT_COMPRESS ,)
694 OPTBIT_NOPRESERVE_OWN,
695 OPTBIT_NOPRESERVE_PERM,
696 OPT_TEST = 1 << 0, // t
697 OPT_EXTRACT = 1 << 1, // x
698 OPT_BASEDIR = 1 << 2, // C
699 OPT_TARNAME = 1 << 3, // f
700 OPT_2STDOUT = 1 << 4, // O
701 OPT_P = 1 << 5, // p
702 OPT_VERBOSE = 1 << 6, // v
703 OPT_KEEP_OLD = 1 << 7, // k
704 OPT_CREATE = USE_FEATURE_TAR_CREATE( (1<<OPTBIT_CREATE )) + 0, // c
705 OPT_DEREFERENCE = USE_FEATURE_TAR_CREATE( (1<<OPTBIT_DEREFERENCE )) + 0, // h
706 OPT_BZIP2 = USE_FEATURE_TAR_BZIP2( (1<<OPTBIT_BZIP2 )) + 0, // j
707 OPT_LZMA = USE_FEATURE_TAR_LZMA( (1<<OPTBIT_LZMA )) + 0, // a
708 OPT_INCLUDE_FROM = USE_FEATURE_TAR_FROM( (1<<OPTBIT_INCLUDE_FROM)) + 0, // T
709 OPT_EXCLUDE_FROM = USE_FEATURE_TAR_FROM( (1<<OPTBIT_EXCLUDE_FROM)) + 0, // X
710 OPT_GZIP = USE_FEATURE_TAR_GZIP( (1<<OPTBIT_GZIP )) + 0, // z
711 OPT_COMPRESS = USE_FEATURE_TAR_COMPRESS((1<<OPTBIT_COMPRESS )) + 0, // Z
712 OPT_NOPRESERVE_OWN = 1 << OPTBIT_NOPRESERVE_OWN , // no-same-owner
713 OPT_NOPRESERVE_PERM = 1 << OPTBIT_NOPRESERVE_PERM, // no-same-permissions
714};
715#if ENABLE_FEATURE_TAR_LONG_OPTIONS
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000716static const struct option tar_long_options[] = {
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000717 { "list", 0, NULL, 't' },
718 { "extract", 0, NULL, 'x' },
719 { "directory", 1, NULL, 'C' },
720 { "file", 1, NULL, 'f' },
721 { "to-stdout", 0, NULL, 'O' },
722 { "same-permissions", 0, NULL, 'p' },
723 { "verbose", 0, NULL, 'v' },
724 { "keep-old", 0, NULL, 'k' },
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000725# if ENABLE_FEATURE_TAR_CREATE
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000726 { "create", 0, NULL, 'c' },
727 { "dereference", 0, NULL, 'h' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000728# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000729# if ENABLE_FEATURE_TAR_BZIP2
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000730 { "bzip2", 0, NULL, 'j' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000731# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000732# if ENABLE_FEATURE_TAR_LZMA
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000733 { "lzma", 0, NULL, 'a' },
Rob Landleyc1d69902006-01-20 18:28:50 +0000734# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000735# if ENABLE_FEATURE_TAR_FROM
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000736 { "files-from", 1, NULL, 'T' },
737 { "exclude-from", 1, NULL, 'X' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000738# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000739# if ENABLE_FEATURE_TAR_GZIP
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000740 { "gzip", 0, NULL, 'z' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000741# endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000742# if ENABLE_FEATURE_TAR_COMPRESS
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000743 { "compress", 0, NULL, 'Z' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000744# endif
Denis Vlasenko30d7a342006-11-27 20:24:40 +0000745 { "no-same-owner", 0, NULL, 0xfd },
746 { "no-same-permissions",0, NULL, 0xfe },
747 /* --exclude takes next bit position in option mask, */
748 /* therefore we have to either put it _after_ --no-same-perm */
749 /* or add OPT[BIT]_EXCLUDE before OPT[BIT]_NOPRESERVE_OWN */
750# if ENABLE_FEATURE_TAR_FROM
751 { "exclude", 1, NULL, 0xff },
752# endif
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000753 { 0, 0, 0, 0 }
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000754};
755#endif
Glenn L McGrathec87d372002-11-27 07:52:22 +0000756
Denis Vlasenko06af2162007-02-03 17:28:39 +0000757int tar_main(int argc, char **argv);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000758int tar_main(int argc, char **argv)
759{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000760 char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000761 archive_handle_t *tar_handle;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000762 char *base_dir = NULL;
Glenn L McGrathf66de642002-11-25 23:57:27 +0000763 const char *tar_filename = "-";
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000764 unsigned opt;
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000765 int verboseFlag = 0;
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000766#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
"Vladimir N. Oleynik"84e75112005-10-15 06:32:38 +0000767 llist_t *excludes = NULL;
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000768#endif
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000769
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000770 /* Initialise default values */
771 tar_handle = init_handle();
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000772 tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS
773 | ARCHIVE_PRESERVE_DATE
774 | ARCHIVE_EXTRACT_UNCONDITIONAL;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000775
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000776 /* Prepend '-' to the first argument if required */
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000777 opt_complementary = "--:" // first arg is options
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000778 "tt:vv:" // count -t,-v
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000779 "?:" // bail out with usage instead of error return
780 "X::T::" // cumulative lists
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000781#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
Denis Vlasenko30d7a342006-11-27 20:24:40 +0000782 "\xff::" // cumulative lists for --exclude
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000783#endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000784 USE_FEATURE_TAR_CREATE("c:") "t:x:" // at least one of these is reqd
785 USE_FEATURE_TAR_CREATE("c--tx:t--cx:x--ct") // mutually exclusive
786 SKIP_FEATURE_TAR_CREATE("t--x:x--t"); // mutually exclusive
Denis Vlasenkoc61852a2006-11-29 11:09:43 +0000787#if ENABLE_FEATURE_TAR_LONG_OPTIONS
788 applet_long_options = tar_long_options;
789#endif
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000790 opt = getopt32(argc, argv,
791 "txC:f:Opvk"
792 USE_FEATURE_TAR_CREATE( "ch" )
793 USE_FEATURE_TAR_BZIP2( "j" )
794 USE_FEATURE_TAR_LZMA( "a" )
795 USE_FEATURE_TAR_FROM( "T:X:")
796 USE_FEATURE_TAR_GZIP( "z" )
797 USE_FEATURE_TAR_COMPRESS("Z" )
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000798 , &base_dir // -C dir
799 , &tar_filename // -f filename
800 USE_FEATURE_TAR_FROM(, &(tar_handle->accept)) // T
801 USE_FEATURE_TAR_FROM(, &(tar_handle->reject)) // X
802#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
803 , &excludes // --exclude
804#endif
805 , &verboseFlag // combined count for -t and -v
806 , &verboseFlag // combined count for -t and -v
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000807 );
Rob Landley60fe7bf2005-10-16 03:54:49 +0000808
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000809 if (verboseFlag) tar_handle->action_header = header_verbose_list;
810 if (verboseFlag == 1) tar_handle->action_header = header_list;
811
Denis Vlasenkob5963352006-11-26 01:46:59 +0000812 if (opt & OPT_EXTRACT)
Rob Landley60fe7bf2005-10-16 03:54:49 +0000813 tar_handle->action_data = data_extract_all;
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000814
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000815 if (opt & OPT_2STDOUT)
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000816 tar_handle->action_data = data_extract_to_stdout;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000817
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000818 if (opt & OPT_KEEP_OLD)
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000819 tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL;
Glenn L McGratheba86e22003-11-14 12:53:42 +0000820
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000821 if (opt & OPT_NOPRESERVE_OWN)
Rob Landleyf3d6c942005-10-27 22:49:08 +0000822 tar_handle->flags |= ARCHIVE_NOPRESERVE_OWN;
823
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000824 if (opt & OPT_NOPRESERVE_PERM)
Rob Landleyf3d6c942005-10-27 22:49:08 +0000825 tar_handle->flags |= ARCHIVE_NOPRESERVE_PERM;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000826
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000827 if (opt & OPT_GZIP)
Glenn L McGratheba86e22003-11-14 12:53:42 +0000828 get_header_ptr = get_header_tar_gz;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000829
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000830 if (opt & OPT_BZIP2)
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000831 get_header_ptr = get_header_tar_bz2;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000832
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000833 if (opt & OPT_LZMA)
Rob Landleyc1d69902006-01-20 18:28:50 +0000834 get_header_ptr = get_header_tar_lzma;
835
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000836 if (opt & OPT_COMPRESS)
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000837 get_header_ptr = get_header_tar_Z;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000838
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000839#if ENABLE_FEATURE_TAR_FROM
840 tar_handle->reject = append_file_list_to_list(tar_handle->reject);
841#if ENABLE_FEATURE_TAR_LONG_OPTIONS
842 /* Append excludes to reject */
843 while (excludes) {
844 llist_t *next = excludes->link;
845 excludes->link = tar_handle->reject;
846 tar_handle->reject = excludes;
847 excludes = next;
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000848 }
Denis Vlasenko8c0164c2007-02-04 21:30:35 +0000849#endif
850 tar_handle->accept = append_file_list_to_list(tar_handle->accept);
851#endif
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000852
Glenn L McGrath29833302002-10-06 23:25:23 +0000853 /* Check if we are reading from stdin */
"Vladimir N. Oleynik"84e75112005-10-15 06:32:38 +0000854 if (argv[optind] && *argv[optind] == '-') {
Glenn L McGrath29833302002-10-06 23:25:23 +0000855 /* Default is to read from stdin, so just skip to next arg */
Glenn L McGrath8132e932002-09-28 02:06:39 +0000856 optind++;
857 }
858
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000859 /* Setup an array of filenames to work with */
Eric Andersenaff114c2004-04-14 17:51:38 +0000860 /* TODO: This is the same as in ar, separate function ? */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000861 while (optind < argc) {
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000862 /* kill trailing '/' unless the string is just "/" */
863 char *cp = last_char_is(argv[optind], '/');
864 if (cp > argv[optind])
865 *cp = '\0';
Denis Vlasenko8d9f4952007-04-08 15:08:42 +0000866 llist_add_to_end(&tar_handle->accept, argv[optind]);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000867 optind++;
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000868 }
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000869
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000870 if (tar_handle->accept || tar_handle->reject)
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000871 tar_handle->filter = filter_accept_reject_list;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000872
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000873 /* Open the tar file */
874 {
875 FILE *tar_stream;
876 int flags;
877
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000878 if (opt & OPT_CREATE) {
Glenn L McGrathba496512003-11-20 09:06:10 +0000879 /* Make sure there is at least one file to tar up. */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000880 if (tar_handle->accept == NULL)
881 bb_error_msg_and_die("empty archive");
882
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000883 tar_stream = stdout;
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000884 /* Mimicking GNU tar 1.15.1: */
885 flags = O_WRONLY|O_CREAT|O_TRUNC;
886 /* was doing unlink; open(O_WRONLY|O_CREAT|O_EXCL); why? */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000887 } else {
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000888 tar_stream = stdin;
889 flags = O_RDONLY;
890 }
891
Denis Vlasenko9f739442006-12-16 23:49:13 +0000892 if (LONE_DASH(tar_filename)) {
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000893 tar_handle->src_fd = fileno(tar_stream);
Denis Vlasenko13858992006-10-08 12:49:22 +0000894 tar_handle->seek = seek_by_read;
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000895 } else {
Denis Vlasenkocf749bc2006-11-26 15:45:17 +0000896 tar_handle->src_fd = xopen(tar_filename, flags);
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000897 }
898 }
899
Bernhard Reutner-Fischerd9cf7ac2006-04-12 18:39:58 +0000900 if (base_dir)
Rob Landley86b4d642006-08-03 17:58:17 +0000901 xchdir(base_dir);
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000902
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000903#ifdef CHECK_FOR_CHILD_EXITCODE
904 /* We need to know whether child (gzip/bzip/etc) exits abnormally */
905 signal(SIGCHLD, handle_SIGCHLD);
906#endif
907
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000908 /* create an archive */
Denis Vlasenkod031ffa2006-11-24 21:54:44 +0000909 if (opt & OPT_CREATE) {
Rob Landleycc8885f2005-08-30 03:40:03 +0000910 int zipMode = 0;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000911 if (ENABLE_FEATURE_TAR_GZIP && get_header_ptr == get_header_tar_gz)
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000912 zipMode = 1;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000913 if (ENABLE_FEATURE_TAR_BZIP2 && get_header_ptr == get_header_tar_bz2)
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000914 zipMode = 2;
Denis Vlasenkoc8889462006-12-17 19:08:20 +0000915 /* NB: writeTarFile() closes tar_handle->src_fd */
916 return writeTarFile(tar_handle->src_fd, verboseFlag, opt & OPT_DEREFERENCE,
Bernhard Reutner-Fischer18260d52006-04-18 14:17:49 +0000917 tar_handle->accept,
Denis Vlasenko3feb2fc2006-11-24 21:55:55 +0000918 tar_handle->reject, zipMode);
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000919 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000920
Denis Vlasenkob8a8e602006-11-24 14:59:45 +0000921 while (get_header_ptr(tar_handle) == EXIT_SUCCESS)
922 /* nothing */;
923
924 /* Check that every file that should have been extracted was */
925 while (tar_handle->accept) {
926 if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
927 && !find_list_entry(tar_handle->passed, tar_handle->accept->data)
928 ) {
929 bb_error_msg_and_die("%s: not found in archive",
930 tar_handle->accept->data);
931 }
932 tar_handle->accept = tar_handle->accept->link;
933 }
934 if (ENABLE_FEATURE_CLEAN_UP /* && tar_handle->src_fd != STDIN_FILENO */)
Glenn L McGrath8132e932002-09-28 02:06:39 +0000935 close(tar_handle->src_fd);
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000936
Denis Vlasenko376ce1e2006-11-24 14:51:01 +0000937 return EXIT_SUCCESS;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000938}