blob: a4b13b5def5afd291d04a481b93c35f2970f0e7e [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
22 * This is free software under the GNU General Public License.
23 *
Rob Landley60fe7bf2005-10-16 03:54:49 +000024 * Licensed under GPL v2 (or later), see file LICENSE in this tarball.
Eric Andersencc8ed391999-10-05 16:24:54 +000025 */
26
Eric Andersencc8ed391999-10-05 16:24:54 +000027#include <fcntl.h>
Matt Kraai43c8c382000-09-04 16:51:55 +000028#include <getopt.h>
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000029#include <search.h>
30#include <stdio.h>
Eric Andersened3ef502001-01-27 08:24:39 +000031#include <stdlib.h>
32#include <unistd.h>
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000033#include <fnmatch.h>
34#include <string.h>
35#include <errno.h>
Robert Grieblf2f26e72002-07-23 22:05:47 +000036#include <signal.h>
37#include <sys/wait.h>
38#include <sys/socket.h>
Eric Andersen4f807a82004-07-26 09:11:12 +000039#include <sys/sysmacros.h> /* major() and minor() */
Glenn L McGrathef0eab52001-10-25 14:49:48 +000040#include "unarchive.h"
Eric Andersencbe31da2001-02-20 06:14:08 +000041#include "busybox.h"
Eric Andersencc8ed391999-10-05 16:24:54 +000042
Eric Andersenbdfd0d72001-10-24 05:00:29 +000043#ifdef CONFIG_FEATURE_TAR_CREATE
Eric Andersencc8ed391999-10-05 16:24:54 +000044
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000045/* Tar file constants */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000046# define TAR_MAGIC "ustar" /* ustar and a null */
47# define TAR_VERSION " " /* Be compatable with GNU tar format */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000048
Rob Landley3ee6c242005-10-15 03:06:21 +000049#define TAR_BLOCK_SIZE 512
50#define TAR_MAGIC_LEN 6
51#define TAR_VERSION_LEN 2
Eric Andersencc8ed391999-10-05 16:24:54 +000052
Erik Andersen298854f2000-03-23 01:09:18 +000053/* POSIX tar Header Block, from POSIX 1003.1-1990 */
Rob Landley3ee6c242005-10-15 03:06:21 +000054#define NAME_SIZE 100
Glenn L McGratha0ee8812002-08-22 13:44:08 +000055struct TarHeader { /* byte offset */
56 char name[NAME_SIZE]; /* 0-99 */
57 char mode[8]; /* 100-107 */
58 char uid[8]; /* 108-115 */
59 char gid[8]; /* 116-123 */
60 char size[12]; /* 124-135 */
61 char mtime[12]; /* 136-147 */
62 char chksum[8]; /* 148-155 */
63 char typeflag; /* 156-156 */
64 char linkname[NAME_SIZE]; /* 157-256 */
65 char magic[6]; /* 257-262 */
66 char version[2]; /* 263-264 */
67 char uname[32]; /* 265-296 */
68 char gname[32]; /* 297-328 */
69 char devmajor[8]; /* 329-336 */
70 char devminor[8]; /* 337-344 */
71 char prefix[155]; /* 345-499 */
72 char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
Erik Andersen298854f2000-03-23 01:09:18 +000073};
74typedef struct TarHeader TarHeader;
Eric Andersencc8ed391999-10-05 16:24:54 +000075
Eric Andersen3d957c82000-12-07 00:34:58 +000076/*
77** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
78** the only functions that deal with the HardLinkInfo structure.
79** Even these functions use the xxxHardLinkInfo() functions.
80*/
81typedef struct HardLinkInfo HardLinkInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +000082struct HardLinkInfo {
83 HardLinkInfo *next; /* Next entry in list */
Rob Landley60fe7bf2005-10-16 03:54:49 +000084 dev_t dev; /* Device number */
85 ino_t ino; /* Inode number */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000086 short linkCount; /* (Hard) Link Count */
87 char name[1]; /* Start of filename (must be last) */
Eric Andersen3d957c82000-12-07 00:34:58 +000088};
89
Erik Andersen68a9ea42000-04-04 18:39:50 +000090/* Some info to be carried along when creating a new tarball */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000091struct TarBallInfo {
Rob Landley60fe7bf2005-10-16 03:54:49 +000092 char *fileName; /* File name of the tarball */
93 int tarFd; /* Open-for-write file descriptor
94 for the tarball */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000095 struct stat statBuf; /* Stat info for the tarball, letting
96 us know the inode and device that the
Eric Andersenc7bda1c2004-03-15 08:29:22 +000097 tarball lives, so we can avoid trying
Glenn L McGratha0ee8812002-08-22 13:44:08 +000098 to include the tarball into itself */
Rob Landley60fe7bf2005-10-16 03:54:49 +000099 int verboseFlag; /* Whether to print extra stuff or not */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000100 const llist_t *excludeList; /* List of files to not include */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000101 HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
102 HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
Erik Andersen68a9ea42000-04-04 18:39:50 +0000103};
104typedef struct TarBallInfo TarBallInfo;
105
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000106/* A nice enum with all the possible tar file content types */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000107enum TarFileType {
108 REGTYPE = '0', /* regular file */
109 REGTYPE0 = '\0', /* regular file (ancient bug compat) */
110 LNKTYPE = '1', /* hard link */
111 SYMTYPE = '2', /* symbolic link */
112 CHRTYPE = '3', /* character special */
113 BLKTYPE = '4', /* block special */
114 DIRTYPE = '5', /* directory */
115 FIFOTYPE = '6', /* FIFO special */
116 CONTTYPE = '7', /* reserved */
117 GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
118 GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000119};
120typedef enum TarFileType TarFileType;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000121
Eric Andersen3d957c82000-12-07 00:34:58 +0000122/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
Glenn L McGrathf66de642002-11-25 23:57:27 +0000123static inline void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
124 struct stat *statbuf,
125 const char *name)
Eric Andersen3d957c82000-12-07 00:34:58 +0000126{
127 /* Note: hlInfoHeadPtr can never be NULL! */
128 HardLinkInfo *hlInfo;
129
Glenn L McGrathf66de642002-11-25 23:57:27 +0000130 hlInfo = (HardLinkInfo *) xmalloc(sizeof(HardLinkInfo) + strlen(name));
131 hlInfo->next = *hlInfoHeadPtr;
132 *hlInfoHeadPtr = hlInfo;
133 hlInfo->dev = statbuf->st_dev;
134 hlInfo->ino = statbuf->st_ino;
135 hlInfo->linkCount = statbuf->st_nlink;
136 strcpy(hlInfo->name, name);
Eric Andersen3d957c82000-12-07 00:34:58 +0000137}
138
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000139static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
Eric Andersen3d957c82000-12-07 00:34:58 +0000140{
141 HardLinkInfo *hlInfo = NULL;
142 HardLinkInfo *hlInfoNext = NULL;
143
144 if (hlInfoHeadPtr) {
145 hlInfo = *hlInfoHeadPtr;
146 while (hlInfo) {
147 hlInfoNext = hlInfo->next;
148 free(hlInfo);
149 hlInfo = hlInfoNext;
150 }
151 *hlInfoHeadPtr = NULL;
152 }
153 return;
154}
155
156/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
Glenn L McGrathf66de642002-11-25 23:57:27 +0000157static inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
Eric Andersen3d957c82000-12-07 00:34:58 +0000158{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000159 while (hlInfo) {
Glenn L McGrathf66de642002-11-25 23:57:27 +0000160 if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
Eric Andersen3d957c82000-12-07 00:34:58 +0000161 break;
162 hlInfo = hlInfo->next;
163 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000164 return (hlInfo);
Eric Andersen3d957c82000-12-07 00:34:58 +0000165}
166
Erik Andersen6acaa402000-03-26 14:03:20 +0000167/* Put an octal string into the specified buffer.
168 * The number is zero and space padded and possibly null padded.
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000169 * Returns TRUE if successful. */
170static int putOctal(char *cp, int len, long value)
Erik Andersen6acaa402000-03-26 14:03:20 +0000171{
172 int tempLength;
Erik Andersen6acaa402000-03-26 14:03:20 +0000173 char tempBuffer[32];
Erik Andersen5661fe02000-04-05 01:00:52 +0000174 char *tempString = tempBuffer;
Erik Andersen6acaa402000-03-26 14:03:20 +0000175
176 /* Create a string of the specified length with an initial space,
177 * leading zeroes and the octal number, and a trailing null. */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000178 sprintf(tempString, "%0*lo", len - 1, value);
Erik Andersen6acaa402000-03-26 14:03:20 +0000179
180 /* If the string is too large, suppress the leading space. */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000181 tempLength = strlen(tempString) + 1;
Erik Andersen6acaa402000-03-26 14:03:20 +0000182 if (tempLength > len) {
183 tempLength--;
184 tempString++;
185 }
186
187 /* If the string is still too large, suppress the trailing null. */
188 if (tempLength > len)
189 tempLength--;
190
191 /* If the string is still too large, fail. */
192 if (tempLength > len)
193 return FALSE;
194
195 /* Copy the string to the field. */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000196 memcpy(cp, tempString, len);
Erik Andersen6acaa402000-03-26 14:03:20 +0000197
198 return TRUE;
199}
200
Erik Andersen68a9ea42000-04-04 18:39:50 +0000201/* Write out a tar header for the specified file/directory/whatever */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000202static inline int writeTarHeader(struct TarBallInfo *tbInfo,
Rob Landley60fe7bf2005-10-16 03:54:49 +0000203 const char *header_name, const char *real_name, struct stat *statbuf)
Erik Andersen6acaa402000-03-26 14:03:20 +0000204{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000205 long chksum = 0;
Erik Andersen5661fe02000-04-05 01:00:52 +0000206 struct TarHeader header;
207 const unsigned char *cp = (const unsigned char *) &header;
208 ssize_t size = sizeof(struct TarHeader);
Erik Andersen3364d782000-03-28 00:58:14 +0000209
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000210 memset(&header, 0, size);
211
212 strncpy(header.name, header_name, sizeof(header.name));
Erik Andersenecd51242000-04-08 03:08:21 +0000213
Erik Andersen5661fe02000-04-05 01:00:52 +0000214 putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
215 putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
216 putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000217 putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
Erik Andersen5661fe02000-04-05 01:00:52 +0000218 putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000219 strncpy(header.magic, TAR_MAGIC TAR_VERSION,
220 TAR_MAGIC_LEN + TAR_VERSION_LEN);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000221
Erik Andersen84e09e42000-04-08 20:58:35 +0000222 /* Enter the user and group names (default to root if it fails) */
Bernhard Reutner-Fischerd5bd1372005-09-20 21:06:17 +0000223 if (bb_getpwuid(header.uname, statbuf->st_uid, sizeof(header.uname)) == NULL)
Erik Andersen84e09e42000-04-08 20:58:35 +0000224 strcpy(header.uname, "root");
Bernhard Reutner-Fischerd5bd1372005-09-20 21:06:17 +0000225 if (bb_getgrgid(header.gname, statbuf->st_gid, sizeof(header.gname)) == NULL)
Eric Andersen02e6ba92002-09-30 20:39:56 +0000226 strcpy(header.gname, "root");
Erik Andersen5661fe02000-04-05 01:00:52 +0000227
Eric Andersen3d957c82000-12-07 00:34:58 +0000228 if (tbInfo->hlInfo) {
229 /* This is a hard link */
230 header.typeflag = LNKTYPE;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000231 strncpy(header.linkname, tbInfo->hlInfo->name,
232 sizeof(header.linkname));
Eric Andersen3d957c82000-12-07 00:34:58 +0000233 } else if (S_ISLNK(statbuf->st_mode)) {
Mark Whitley8a633262001-04-30 18:17:00 +0000234 char *lpath = xreadlink(real_name);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000235
236 if (!lpath) /* Already printed err msg inside xreadlink() */
237 return (FALSE);
238 header.typeflag = SYMTYPE;
239 strncpy(header.linkname, lpath, sizeof(header.linkname));
Mark Whitley8a633262001-04-30 18:17:00 +0000240 free(lpath);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000241 } else if (S_ISDIR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000242 header.typeflag = DIRTYPE;
243 strncat(header.name, "/", sizeof(header.name));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000244 } else if (S_ISCHR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000245 header.typeflag = CHRTYPE;
246 putOctal(header.devmajor, sizeof(header.devmajor),
Eric Andersen4f807a82004-07-26 09:11:12 +0000247 major(statbuf->st_rdev));
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000248 putOctal(header.devminor, sizeof(header.devminor),
Eric Andersen4f807a82004-07-26 09:11:12 +0000249 minor(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000250 } else if (S_ISBLK(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000251 header.typeflag = BLKTYPE;
252 putOctal(header.devmajor, sizeof(header.devmajor),
Eric Andersen4f807a82004-07-26 09:11:12 +0000253 major(statbuf->st_rdev));
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000254 putOctal(header.devminor, sizeof(header.devminor),
Eric Andersen4f807a82004-07-26 09:11:12 +0000255 minor(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000256 } else if (S_ISFIFO(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000257 header.typeflag = FIFOTYPE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000258 } else if (S_ISREG(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000259 header.typeflag = REGTYPE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000260 putOctal(header.size, sizeof(header.size), statbuf->st_size);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000261 } else {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000262 bb_error_msg("%s: Unknown file type", real_name);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000263 return (FALSE);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000264 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000265
Eric Andersen77d92682001-05-23 20:32:09 +0000266 /* Calculate and store the checksum (i.e., the sum of all of the bytes of
Erik Andersen5661fe02000-04-05 01:00:52 +0000267 * the header). The checksum field must be filled with blanks for the
268 * calculation. The checksum field is formatted differently from the
269 * other fields: it has [6] digits, a null, then a space -- rather than
270 * digits, followed by a null like the other fields... */
271 memset(header.chksum, ' ', sizeof(header.chksum));
272 cp = (const unsigned char *) &header;
273 while (size-- > 0)
274 chksum += *cp++;
275 putOctal(header.chksum, 7, chksum);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000276
Erik Andersen5661fe02000-04-05 01:00:52 +0000277 /* Now write the header out to disk */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000278 if ((size =
Manuel Novoa III cad53642003-03-19 09:13:01 +0000279 bb_full_write(tbInfo->tarFd, (char *) &header,
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000280 sizeof(struct TarHeader))) < 0) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000281 bb_error_msg(bb_msg_io_error, real_name);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000282 return (FALSE);
Erik Andersen5661fe02000-04-05 01:00:52 +0000283 }
284 /* Pad the header up to the tar block size */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000285 for (; size < TAR_BLOCK_SIZE; size++) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000286 write(tbInfo->tarFd, "\0", 1);
287 }
288 /* Now do the verbose thing (or not) */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000289
Robert Grieblf2f26e72002-07-23 22:05:47 +0000290 if (tbInfo->verboseFlag) {
Eric Andersenfdd51032000-08-02 18:48:26 +0000291 FILE *vbFd = stdout;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000292
Eric Andersen70060d22004-03-27 10:02:48 +0000293 if (tbInfo->tarFd == STDOUT_FILENO) /* If the archive goes to stdout, verbose to stderr */
Eric Andersenfdd51032000-08-02 18:48:26 +0000294 vbFd = stderr;
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000295
Eric Andersenfdd51032000-08-02 18:48:26 +0000296 fprintf(vbFd, "%s\n", header.name);
297 }
Erik Andersen3364d782000-03-28 00:58:14 +0000298
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000299 return (TRUE);
Erik Andersen3364d782000-03-28 00:58:14 +0000300}
301
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000302# ifdef CONFIG_FEATURE_TAR_FROM
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000303static inline int exclude_file(const llist_t *excluded_files, const char *file)
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000304{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000305 while (excluded_files) {
306 if (excluded_files->data[0] == '/') {
307 if (fnmatch(excluded_files->data, file,
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000308 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
309 return 1;
310 } else {
311 const char *p;
312
313 for (p = file; p[0] != '\0'; p++) {
314 if ((p == file || p[-1] == '/') && p[0] != '/' &&
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000315 fnmatch(excluded_files->data, p,
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000316 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
317 return 1;
318 }
319 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000320 excluded_files = excluded_files->link;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000321 }
322
323 return 0;
324}
"Vladimir N. Oleynik"a62b0e72005-12-06 12:20:57 +0000325# else
326#define exclude_file(excluded_files, file) 0
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000327# endif
Erik Andersen3364d782000-03-28 00:58:14 +0000328
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000329static int writeFileToTarball(const char *fileName, struct stat *statbuf,
330 void *userData)
Erik Andersen3364d782000-03-28 00:58:14 +0000331{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000332 struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
Matt Kraaie80a2632000-12-19 20:45:49 +0000333 const char *header_name;
Rob Landleye5695532006-01-09 03:07:44 +0000334 int inputFileFd = -1;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000335
Eric Andersen3d957c82000-12-07 00:34:58 +0000336 /*
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000337 ** Check to see if we are dealing with a hard link.
338 ** If so -
339 ** Treat the first occurance of a given dev/inode as a file while
340 ** treating any additional occurances as hard links. This is done
341 ** by adding the file information to the HardLinkInfo linked list.
342 */
Eric Andersen3d957c82000-12-07 00:34:58 +0000343 tbInfo->hlInfo = NULL;
344 if (statbuf->st_nlink > 1) {
Glenn L McGrathf66de642002-11-25 23:57:27 +0000345 tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
Eric Andersen3d957c82000-12-07 00:34:58 +0000346 if (tbInfo->hlInfo == NULL)
Glenn L McGrathf66de642002-11-25 23:57:27 +0000347 addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
Eric Andersen3d957c82000-12-07 00:34:58 +0000348 }
349
Erik Andersen68a9ea42000-04-04 18:39:50 +0000350 /* It is against the rules to archive a socket */
351 if (S_ISSOCK(statbuf->st_mode)) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000352 bb_error_msg("%s: socket ignored", fileName);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000353 return (TRUE);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000354 }
355
356 /* It is a bad idea to store the archive we are in the process of creating,
357 * so check the device and inode to be sure that this particular file isn't
358 * the new tarball */
359 if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000360 tbInfo->statBuf.st_ino == statbuf->st_ino) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000361 bb_error_msg("%s: file is the archive; skipping", fileName);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000362 return (TRUE);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000363 }
364
Matt Kraaie80a2632000-12-19 20:45:49 +0000365 header_name = fileName;
366 while (header_name[0] == '/') {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000367 static int alreadyWarned = FALSE;
368
369 if (alreadyWarned == FALSE) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000370 bb_error_msg("Removing leading '/' from member names");
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000371 alreadyWarned = TRUE;
Matt Kraaia1f97752000-12-19 06:24:08 +0000372 }
Matt Kraaie80a2632000-12-19 20:45:49 +0000373 header_name++;
Matt Kraaia1f97752000-12-19 06:24:08 +0000374 }
375
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000376 if (strlen(fileName) >= NAME_SIZE) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000377 bb_error_msg(bb_msg_name_longer_than_foo, NAME_SIZE);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000378 return (TRUE);
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000379 }
380
Matt Kraaie80a2632000-12-19 20:45:49 +0000381 if (header_name[0] == '\0')
Matt Kraaia1f97752000-12-19 06:24:08 +0000382 return TRUE;
383
Rob Landley60fe7bf2005-10-16 03:54:49 +0000384 if (ENABLE_FEATURE_TAR_FROM &&
385 exclude_file(tbInfo->excludeList, header_name)) {
Matt Kraaibe7499c2001-01-03 17:22:10 +0000386 return SKIP;
Matt Kraaia1f97752000-12-19 06:24:08 +0000387 }
Matt Kraaia1f97752000-12-19 06:24:08 +0000388
Rob Landleye5695532006-01-09 03:07:44 +0000389 /* Is this a regular file? */
390 if ((tbInfo->hlInfo == NULL) && (S_ISREG(statbuf->st_mode))) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000391
392 /* open the file we want to archive, and make sure all is well */
393 if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000394 bb_perror_msg("%s: Cannot open", fileName);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000395 return (FALSE);
Erik Andersen5661fe02000-04-05 01:00:52 +0000396 }
Rob Landleye5695532006-01-09 03:07:44 +0000397 }
398
399 /* Add an entry to the tarball */
400 if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
401 return (FALSE);
402 }
403
404 /* If it was a regular file, write out the body */
405 if (inputFileFd >= 0 ) {
406 ssize_t readSize = 0;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000407
Erik Andersen5661fe02000-04-05 01:00:52 +0000408 /* write the file to the archive */
Glenn L McGrath7ffe1332003-11-21 22:24:57 +0000409 readSize = bb_copyfd_eof(inputFileFd, tbInfo->tarFd);
Rob Landleye5695532006-01-09 03:07:44 +0000410 close(inputFileFd);
Glenn L McGrath7ffe1332003-11-21 22:24:57 +0000411
Erik Andersen5661fe02000-04-05 01:00:52 +0000412 /* Pad the file up to the tar block size */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000413 for (; (readSize % TAR_BLOCK_SIZE) != 0; readSize++)
Erik Andersen5661fe02000-04-05 01:00:52 +0000414 write(tbInfo->tarFd, "\0", 1);
Erik Andersen5661fe02000-04-05 01:00:52 +0000415 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000416
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000417 return (TRUE);
Erik Andersen6acaa402000-03-26 14:03:20 +0000418}
419
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000420static inline int writeTarFile(const int tar_fd, const int verboseFlag,
Glenn L McGrath303e9892004-01-25 05:48:28 +0000421 const unsigned long dereferenceFlag, const llist_t *include,
422 const llist_t *exclude, const int gzip)
Erik Andersen6acaa402000-03-26 14:03:20 +0000423{
Robert Grieblf2f26e72002-07-23 22:05:47 +0000424 pid_t gzipPid = 0;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000425
426 int errorFlag = FALSE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000427 ssize_t size;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000428 struct TarBallInfo tbInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000429
Eric Andersen3d957c82000-12-07 00:34:58 +0000430 tbInfo.hlInfoHead = NULL;
Erik Andersen3364d782000-03-28 00:58:14 +0000431
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000432 fchmod(tar_fd, 0644);
433 tbInfo.tarFd = tar_fd;
434 tbInfo.verboseFlag = verboseFlag;
Robert Grieblf2f26e72002-07-23 22:05:47 +0000435
Erik Andersen68a9ea42000-04-04 18:39:50 +0000436 /* Store the stat info for the tarball's file, so
437 * can avoid including the tarball into itself.... */
438 if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000439 bb_perror_msg_and_die("Couldnt stat tar file");
Erik Andersen6acaa402000-03-26 14:03:20 +0000440
Rob Landleycc8885f2005-08-30 03:40:03 +0000441 if ((ENABLE_FEATURE_TAR_GZIP || ENABLE_FEATURE_TAR_BZIP2) && gzip) {
442 int gzipDataPipe[2] = { -1, -1 };
443 int gzipStatusPipe[2] = { -1, -1 };
444 volatile int vfork_exec_errno = 0;
445 char *zip_exec = (gzip == 1) ? "gzip" : "bzip2";
446
447
Rob Landley60fe7bf2005-10-16 03:54:49 +0000448 if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0)
449 bb_perror_msg_and_die("create pipe");
Robert Grieblf2f26e72002-07-23 22:05:47 +0000450
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000451 signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
Robert Grieblf2f26e72002-07-23 22:05:47 +0000452
Glenn L McGrathf66de642002-11-25 23:57:27 +0000453# if __GNUC__
454 /* Avoid vfork clobbering */
455 (void) &include;
456 (void) &errorFlag;
"Vladimir N. Oleynik"a62b0e72005-12-06 12:20:57 +0000457 (void) &zip_exec;
Glenn L McGrathf66de642002-11-25 23:57:27 +0000458# endif
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000459
Glenn L McGrathf66de642002-11-25 23:57:27 +0000460 gzipPid = vfork();
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000461
462 if (gzipPid == 0) {
463 dup2(gzipDataPipe[0], 0);
464 close(gzipDataPipe[1]);
465
Eric Andersenaaff79a2004-05-05 10:37:49 +0000466 if (tbInfo.tarFd != 1)
467 dup2(tbInfo.tarFd, 1);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000468
469 close(gzipStatusPipe[0]);
Bernhard Reutner-Fischer126da9e2005-12-12 11:20:39 +0000470 fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows success */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000471
"Vladimir N. Oleynik"a62b0e72005-12-06 12:20:57 +0000472 execlp(zip_exec, zip_exec, "-f", NULL);
Glenn L McGrathf66de642002-11-25 23:57:27 +0000473 vfork_exec_errno = errno;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000474
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000475 close(gzipStatusPipe[1]);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000476 exit(-1);
477 } else if (gzipPid > 0) {
478 close(gzipDataPipe[0]);
479 close(gzipStatusPipe[1]);
480
481 while (1) {
Robert Grieblf2f26e72002-07-23 22:05:47 +0000482 char buf;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000483
Eric Andersene3393512003-07-05 23:10:27 +0000484 int n = bb_full_read(gzipStatusPipe[0], &buf, 1);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000485
Glenn L McGrathf66de642002-11-25 23:57:27 +0000486 if (n == 0 && vfork_exec_errno != 0) {
487 errno = vfork_exec_errno;
"Vladimir N. Oleynik"a62b0e72005-12-06 12:20:57 +0000488 bb_perror_msg_and_die("Could not exec %s", zip_exec);
Glenn L McGrathf66de642002-11-25 23:57:27 +0000489 } else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000490 continue; /* try it again */
491 break;
Robert Grieblf2f26e72002-07-23 22:05:47 +0000492 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000493 close(gzipStatusPipe[0]);
494
495 tbInfo.tarFd = gzipDataPipe[1];
Rob Landley60fe7bf2005-10-16 03:54:49 +0000496 } else bb_perror_msg_and_die("vfork gzip");
Robert Grieblf2f26e72002-07-23 22:05:47 +0000497 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000498
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000499 tbInfo.excludeList = exclude;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000500
Erik Andersen6acaa402000-03-26 14:03:20 +0000501 /* Read the directory/files and iterate over them one at a time */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000502 while (include) {
Rob Landley60fe7bf2005-10-16 03:54:49 +0000503 if (!recursive_action(include->data, TRUE, dereferenceFlag,
504 FALSE, writeFileToTarball, writeFileToTarball, &tbInfo))
505 {
Erik Andersen68a9ea42000-04-04 18:39:50 +0000506 errorFlag = TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +0000507 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000508 include = include->link;
Erik Andersen6acaa402000-03-26 14:03:20 +0000509 }
Erik Andersen5661fe02000-04-05 01:00:52 +0000510 /* Write two empty blocks to the end of the archive */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000511 for (size = 0; size < (2 * TAR_BLOCK_SIZE); size++)
Erik Andersen5661fe02000-04-05 01:00:52 +0000512 write(tbInfo.tarFd, "\0", 1);
Erik Andersen0817d132000-04-09 15:17:40 +0000513
514 /* To be pedantically correct, we would check if the tarball
Eric Andersen3c5ee9a2000-11-14 22:15:48 +0000515 * is smaller than 20 tar blocks, and pad it if it was smaller,
Erik Andersen0817d132000-04-09 15:17:40 +0000516 * but that isn't necessary for GNU tar interoperability, and
517 * so is considered a waste of space */
518
Rob Landley1a781032005-12-16 21:33:10 +0000519 /* Close so the child process (if any) will exit */
520 close(tbInfo.tarFd);
521
Erik Andersen68a9ea42000-04-04 18:39:50 +0000522 /* Hang up the tools, close up shop, head home */
Rob Landley1a781032005-12-16 21:33:10 +0000523 if (ENABLE_FEATURE_CLEAN_UP)
Rob Landley60fe7bf2005-10-16 03:54:49 +0000524 freeHardLinkInfo(&tbInfo.hlInfoHead);
Rob Landley60fe7bf2005-10-16 03:54:49 +0000525
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000526 if (errorFlag)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000527 bb_error_msg("Error exit delayed from previous errors");
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000528
Rob Landley60fe7bf2005-10-16 03:54:49 +0000529 if (gzipPid && waitpid(gzipPid, NULL, 0)==-1)
530 bb_error_msg("Couldnt wait");
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000531
Robert Grieblf2f26e72002-07-23 22:05:47 +0000532 return !errorFlag;
Erik Andersen6acaa402000-03-26 14:03:20 +0000533}
Rob Landley60fe7bf2005-10-16 03:54:49 +0000534#else
535int writeTarFile(const int tar_fd, const int verboseFlag,
536 const unsigned long dereferenceFlag, const llist_t *include,
537 const llist_t *exclude, const int gzip);
"Vladimir N. Oleynik"84e75112005-10-15 06:32:38 +0000538#endif /* tar_create */
Erik Andersen6acaa402000-03-26 14:03:20 +0000539
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000540#ifdef CONFIG_FEATURE_TAR_FROM
Eric Andersen27cb6842003-06-26 09:07:59 +0000541static llist_t *append_file_list_to_list(llist_t *list)
Glenn L McGrathd642a672001-10-13 06:54:45 +0000542{
Eric Andersen27cb6842003-06-26 09:07:59 +0000543 FILE *src_stream;
544 llist_t *cur = list;
545 llist_t *tmp;
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000546 char *line;
Eric Andersen27cb6842003-06-26 09:07:59 +0000547 llist_t *newlist = NULL;
548
Rob Landley60fe7bf2005-10-16 03:54:49 +0000549 while (cur) {
Eric Andersen27cb6842003-06-26 09:07:59 +0000550 src_stream = bb_xfopen(cur->data, "r");
551 tmp = cur;
552 cur = cur->link;
553 free(tmp);
Rob Landley60fe7bf2005-10-16 03:54:49 +0000554 while ((line = bb_get_chomped_line_from_file(src_stream)) != NULL)
555 newlist = llist_add_to(newlist, line);
556 fclose(src_stream);
Eric Andersen27cb6842003-06-26 09:07:59 +0000557 }
558 return newlist;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000559}
Rob Landley60fe7bf2005-10-16 03:54:49 +0000560#else
561#define append_file_list_to_list(x) 0
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000562#endif
Erik Andersen6acaa402000-03-26 14:03:20 +0000563
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000564#ifdef CONFIG_FEATURE_TAR_COMPRESS
565static char get_header_tar_Z(archive_handle_t *archive_handle)
566{
567 /* Cant lseek over pipe's */
568 archive_handle->seek = seek_by_char;
Eric Andersen27cb6842003-06-26 09:07:59 +0000569
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000570 /* do the decompression, and cleanup */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000571 if (bb_xread_char(archive_handle->src_fd) != 0x1f ||
572 bb_xread_char(archive_handle->src_fd) != 0x9d)
573 {
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000574 bb_error_msg_and_die("Invalid magic");
575 }
576
577 archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress);
578 archive_handle->offset = 0;
579 while (get_header_tar(archive_handle) == EXIT_SUCCESS);
580
581 /* Can only do one file at a time */
582 return(EXIT_FAILURE);
583}
Rob Landley60fe7bf2005-10-16 03:54:49 +0000584#else
585#define get_header_tar_Z 0
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000586#endif
587
Rob Landleyf3d6c942005-10-27 22:49:08 +0000588#define CTX_TEST (1 << 0)
589#define CTX_EXTRACT (1 << 1)
590#define TAR_OPT_BASEDIR (1 << 2)
591#define TAR_OPT_TARNAME (1 << 3)
592#define TAR_OPT_2STDOUT (1 << 4)
593#define TAR_OPT_P (1 << 5)
594#define TAR_OPT_VERBOSE (1 << 6)
595#define TAR_OPT_KEEP_OLD (1 << 7)
Glenn L McGratheba86e22003-11-14 12:53:42 +0000596
Rob Landleyf3d6c942005-10-27 22:49:08 +0000597#define TAR_OPT_AFTER_START 8
598
599#define CTX_CREATE (1 << (TAR_OPT_AFTER_START))
600#define TAR_OPT_DEREFERNCE (1 << (TAR_OPT_AFTER_START + 1))
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000601#ifdef CONFIG_FEATURE_TAR_CREATE
Rob Landleyf3d6c942005-10-27 22:49:08 +0000602# define TAR_OPT_STR_CREATE "ch"
603# define TAR_OPT_AFTER_CREATE TAR_OPT_AFTER_START + 2
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000604#else
Rob Landleyf3d6c942005-10-27 22:49:08 +0000605# define TAR_OPT_STR_CREATE ""
606# define TAR_OPT_AFTER_CREATE TAR_OPT_AFTER_START
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000607#endif
608
Rob Landleyf3d6c942005-10-27 22:49:08 +0000609#define TAR_OPT_BZIP2 (1 << (TAR_OPT_AFTER_CREATE))
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000610#ifdef CONFIG_FEATURE_TAR_BZIP2
Rob Landleyf3d6c942005-10-27 22:49:08 +0000611# define TAR_OPT_STR_BZIP2 "j"
612# define TAR_OPT_AFTER_BZIP2 TAR_OPT_AFTER_CREATE + 1
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000613#else
Rob Landleyf3d6c942005-10-27 22:49:08 +0000614# define TAR_OPT_STR_BZIP2 ""
615# define TAR_OPT_AFTER_BZIP2 TAR_OPT_AFTER_CREATE
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000616#endif
617
Rob Landleyc1d69902006-01-20 18:28:50 +0000618#define TAR_OPT_LZMA (1 << (TAR_OPT_AFTER_BZIP2))
619#ifdef CONFIG_FEATURE_TAR_LZMA
620# define TAR_OPT_STR_LZMA "a"
621# define TAR_OPT_AFTER_LZMA TAR_OPT_AFTER_BZIP2 + 1
622#else
623# define TAR_OPT_STR_LZMA ""
624# define TAR_OPT_AFTER_LZMA TAR_OPT_AFTER_BZIP2
625#endif
626
627#define TAR_OPT_INCLUDE_FROM (1 << (TAR_OPT_AFTER_LZMA))
628#define TAR_OPT_EXCLUDE_FROM (1 << (TAR_OPT_AFTER_LZMA + 1))
Rob Landley60fe7bf2005-10-16 03:54:49 +0000629#ifdef CONFIG_FEATURE_TAR_FROM
Rob Landleyf3d6c942005-10-27 22:49:08 +0000630# define TAR_OPT_STR_FROM "T:X:"
Rob Landleyc1d69902006-01-20 18:28:50 +0000631# define TAR_OPT_AFTER_FROM TAR_OPT_AFTER_LZMA + 2
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000632#else
Rob Landleyf3d6c942005-10-27 22:49:08 +0000633# define TAR_OPT_STR_FROM ""
Rob Landleyc1d69902006-01-20 18:28:50 +0000634# define TAR_OPT_AFTER_FROM TAR_OPT_AFTER_LZMA
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000635#endif
636
Rob Landleyf3d6c942005-10-27 22:49:08 +0000637#define TAR_OPT_GZIP (1 << (TAR_OPT_AFTER_FROM))
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000638#ifdef CONFIG_FEATURE_TAR_GZIP
Rob Landleyf3d6c942005-10-27 22:49:08 +0000639# define TAR_OPT_STR_GZIP "z"
640# define TAR_OPT_AFTER_GZIP TAR_OPT_AFTER_FROM + 1
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000641#else
Rob Landleyf3d6c942005-10-27 22:49:08 +0000642# define TAR_OPT_STR_GZIP ""
643# define TAR_OPT_AFTER_GZIP TAR_OPT_AFTER_FROM
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000644#endif
645
Rob Landleyf3d6c942005-10-27 22:49:08 +0000646#define TAR_OPT_UNCOMPRESS (1 << (TAR_OPT_AFTER_GZIP))
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000647#ifdef CONFIG_FEATURE_TAR_COMPRESS
Rob Landleyf3d6c942005-10-27 22:49:08 +0000648# define TAR_OPT_STR_COMPRESS "Z"
649# define TAR_OPT_AFTER_COMPRESS TAR_OPT_AFTER_GZIP + 1
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000650#else
Rob Landleyf3d6c942005-10-27 22:49:08 +0000651# define TAR_OPT_STR_COMPRESS ""
652# define TAR_OPT_AFTER_COMPRESS TAR_OPT_AFTER_GZIP
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000653#endif
654
Rob Landleyf3d6c942005-10-27 22:49:08 +0000655#define TAR_OPT_NOPRESERVE_OWN (1 << (TAR_OPT_AFTER_COMPRESS))
656#define TAR_OPT_NOPRESERVE_PERM (1 << (TAR_OPT_AFTER_COMPRESS + 1))
657#define TAR_OPT_STR_NOPRESERVE "\203\213"
658#define TAR_OPT_AFTER_NOPRESERVE TAR_OPT_AFTER_COMPRESS + 2
659
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000660static const char tar_options[]="txC:f:Opvk" \
661 TAR_OPT_STR_CREATE \
662 TAR_OPT_STR_BZIP2 \
Rob Landleyc1d69902006-01-20 18:28:50 +0000663 TAR_OPT_STR_LZMA \
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000664 TAR_OPT_STR_FROM \
665 TAR_OPT_STR_GZIP \
Rob Landleyf3d6c942005-10-27 22:49:08 +0000666 TAR_OPT_STR_COMPRESS \
667 TAR_OPT_STR_NOPRESERVE;
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000668
669#ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS
670static const struct option tar_long_options[] = {
Rob Landley60fe7bf2005-10-16 03:54:49 +0000671 { "list", 0, NULL, 't' },
672 { "extract", 0, NULL, 'x' },
673 { "directory", 1, NULL, 'C' },
674 { "file", 1, NULL, 'f' },
675 { "to-stdout", 0, NULL, 'O' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000676 { "same-permissions", 0, NULL, 'p' },
Rob Landley60fe7bf2005-10-16 03:54:49 +0000677 { "verbose", 0, NULL, 'v' },
678 { "keep-old", 0, NULL, 'k' },
Rob Landleyf3d6c942005-10-27 22:49:08 +0000679 { "no-same-owner", 0, NULL, '\203' },
680 { "no-same-permissions",0, NULL, '\213' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000681# ifdef CONFIG_FEATURE_TAR_CREATE
Rob Landley60fe7bf2005-10-16 03:54:49 +0000682 { "create", 0, NULL, 'c' },
683 { "dereference", 0, NULL, 'h' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000684# endif
685# ifdef CONFIG_FEATURE_TAR_BZIP2
Rob Landley60fe7bf2005-10-16 03:54:49 +0000686 { "bzip2", 0, NULL, 'j' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000687# endif
Rob Landleyc1d69902006-01-20 18:28:50 +0000688# ifdef CONFIG_FEATURE_TAR_LZMA
689 { "lzma", 0, NULL, 'a' },
690# endif
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000691# ifdef CONFIG_FEATURE_TAR_FROM
Rob Landley60fe7bf2005-10-16 03:54:49 +0000692 { "files-from", 1, NULL, 'T' },
693 { "exclude-from", 1, NULL, 'X' },
694 { "exclude", 1, NULL, '\n' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000695# endif
696# ifdef CONFIG_FEATURE_TAR_GZIP
Rob Landley60fe7bf2005-10-16 03:54:49 +0000697 { "gzip", 0, NULL, 'z' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000698# endif
699# ifdef CONFIG_FEATURE_TAR_COMPRESS
Rob Landley60fe7bf2005-10-16 03:54:49 +0000700 { "compress", 0, NULL, 'Z' },
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000701# endif
"Vladimir N. Oleynik"84e75112005-10-15 06:32:38 +0000702 { 0, 0, 0, 0 }
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000703};
Rob Landley60fe7bf2005-10-16 03:54:49 +0000704#else
705#define tar_long_options 0
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000706#endif
Glenn L McGrathec87d372002-11-27 07:52:22 +0000707
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000708int tar_main(int argc, char **argv)
709{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000710 char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000711 archive_handle_t *tar_handle;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000712 char *base_dir = NULL;
Glenn L McGrathf66de642002-11-25 23:57:27 +0000713 const char *tar_filename = "-";
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000714 unsigned long opt;
"Vladimir N. Oleynik"84e75112005-10-15 06:32:38 +0000715 llist_t *excludes = NULL;
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000716
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000717 /* Initialise default values */
718 tar_handle = init_handle();
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000719 tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS | ARCHIVE_PRESERVE_DATE | ARCHIVE_EXTRACT_UNCONDITIONAL;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000720
"Vladimir N. Oleynik"f704b272005-10-14 09:56:52 +0000721 /* Prepend '-' to the first argument if required */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000722 bb_opt_complementally = ENABLE_FEATURE_TAR_CREATE ?
Rob Landleya4d45d42005-10-16 08:42:18 +0000723 "--:X::T::\n::c:t:x:?:c--tx:t--cx:x--ct" :
724 "--:X::T::\n::t:x:?:t--x:x--t";
Rob Landley60fe7bf2005-10-16 03:54:49 +0000725 if (ENABLE_FEATURE_TAR_LONG_OPTIONS)
726 bb_applet_long_options = tar_long_options;
Eric Andersen27cb6842003-06-26 09:07:59 +0000727 opt = bb_getopt_ulflags(argc, argv, tar_options,
Eric Andersen27cb6842003-06-26 09:07:59 +0000728 &base_dir, /* Change to dir <optarg> */
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000729 &tar_filename /* archive filename */
730#ifdef CONFIG_FEATURE_TAR_FROM
Glenn L McGratha88ae492004-07-21 09:00:39 +0000731 , &(tar_handle->accept),
Rob Landley3ee6c242005-10-15 03:06:21 +0000732 &(tar_handle->reject),
733 &excludes
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000734#endif
735 );
Rob Landley60fe7bf2005-10-16 03:54:49 +0000736
737 if (opt & CTX_TEST) {
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000738 if ((tar_handle->action_header == header_list) ||
Rob Landley60fe7bf2005-10-16 03:54:49 +0000739 (tar_handle->action_header == header_verbose_list))
740 {
741 tar_handle->action_header = header_verbose_list;
742 } else tar_handle->action_header = header_list;
Eric Andersen27cb6842003-06-26 09:07:59 +0000743 }
Rob Landley60fe7bf2005-10-16 03:54:49 +0000744 if((opt & CTX_EXTRACT) && tar_handle->action_data != data_extract_to_stdout)
745 tar_handle->action_data = data_extract_all;
746
747 if (opt & TAR_OPT_2STDOUT)
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000748 tar_handle->action_data = data_extract_to_stdout;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000749
750 if (opt & TAR_OPT_VERBOSE) {
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000751 if ((tar_handle->action_header == header_list) ||
752 (tar_handle->action_header == header_verbose_list))
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000753 {
Rob Landley3ee6c242005-10-15 03:06:21 +0000754 tar_handle->action_header = header_verbose_list;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000755 } else
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000756 tar_handle->action_header = header_list;
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000757 }
Rob Landley60fe7bf2005-10-16 03:54:49 +0000758 if (opt & TAR_OPT_KEEP_OLD)
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000759 tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL;
Glenn L McGratheba86e22003-11-14 12:53:42 +0000760
Rob Landleyf3d6c942005-10-27 22:49:08 +0000761 if (opt & TAR_OPT_NOPRESERVE_OWN)
762 tar_handle->flags |= ARCHIVE_NOPRESERVE_OWN;
763
764 if (opt & TAR_OPT_NOPRESERVE_PERM)
765 tar_handle->flags |= ARCHIVE_NOPRESERVE_PERM;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000766
767 if (ENABLE_FEATURE_TAR_GZIP && (opt & TAR_OPT_GZIP))
Glenn L McGratheba86e22003-11-14 12:53:42 +0000768 get_header_ptr = get_header_tar_gz;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000769
770 if (ENABLE_FEATURE_TAR_BZIP2 && (opt & TAR_OPT_BZIP2))
Glenn L McGrath3b9fc8f2003-11-18 20:23:04 +0000771 get_header_ptr = get_header_tar_bz2;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000772
Rob Landleyc1d69902006-01-20 18:28:50 +0000773 if (ENABLE_FEATURE_TAR_LZMA && (opt & TAR_OPT_LZMA))
774 get_header_ptr = get_header_tar_lzma;
775
Rob Landley60fe7bf2005-10-16 03:54:49 +0000776 if (ENABLE_FEATURE_TAR_COMPRESS && (opt & TAR_OPT_UNCOMPRESS))
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000777 get_header_ptr = get_header_tar_Z;
Rob Landley60fe7bf2005-10-16 03:54:49 +0000778
779 if (ENABLE_FEATURE_TAR_FROM) {
780 tar_handle->reject = append_file_list_to_list(tar_handle->reject);
781 /* Append excludes to reject */
782 while (excludes) {
783 llist_t *temp = excludes->link;
784 excludes->link = tar_handle->reject;
785 tar_handle->reject = excludes;
786 excludes = temp;
787 }
788 tar_handle->accept = append_file_list_to_list(tar_handle->accept);
Glenn L McGrath56f16b42003-11-18 21:37:52 +0000789 }
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000790
Glenn L McGrath29833302002-10-06 23:25:23 +0000791 /* Check if we are reading from stdin */
"Vladimir N. Oleynik"84e75112005-10-15 06:32:38 +0000792 if (argv[optind] && *argv[optind] == '-') {
Glenn L McGrath29833302002-10-06 23:25:23 +0000793 /* Default is to read from stdin, so just skip to next arg */
Glenn L McGrath8132e932002-09-28 02:06:39 +0000794 optind++;
795 }
796
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000797 /* Setup an array of filenames to work with */
Eric Andersenaff114c2004-04-14 17:51:38 +0000798 /* TODO: This is the same as in ar, separate function ? */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000799 while (optind < argc) {
Glenn L McGrathce91c8a2003-12-26 14:01:37 +0000800 char *filename_ptr = last_char_is(argv[optind], '/');
Rob Landley60fe7bf2005-10-16 03:54:49 +0000801 if (filename_ptr > argv[optind])
Glenn L McGrathe8571222003-11-20 10:47:06 +0000802 *filename_ptr = '\0';
Rob Landley60fe7bf2005-10-16 03:54:49 +0000803
Glenn L McGrath66125c82002-12-08 00:54:33 +0000804 tar_handle->accept = llist_add_to(tar_handle->accept, argv[optind]);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000805 optind++;
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000806 }
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000807
Rob Landley60fe7bf2005-10-16 03:54:49 +0000808 if ((tar_handle->accept) || (tar_handle->reject))
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000809 tar_handle->filter = filter_accept_reject_list;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000810
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000811 /* Open the tar file */
812 {
813 FILE *tar_stream;
814 int flags;
815
Rob Landley60fe7bf2005-10-16 03:54:49 +0000816 if (ENABLE_FEATURE_TAR_CREATE && (opt & CTX_CREATE)) {
Glenn L McGrathba496512003-11-20 09:06:10 +0000817 /* Make sure there is at least one file to tar up. */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000818 if (tar_handle->accept == NULL)
819 bb_error_msg_and_die("empty archive");
820
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000821 tar_stream = stdout;
822 flags = O_WRONLY | O_CREAT | O_EXCL;
823 unlink(tar_filename);
Rob Landley60fe7bf2005-10-16 03:54:49 +0000824 } else {
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000825 tar_stream = stdin;
826 flags = O_RDONLY;
827 }
828
829 if ((tar_filename[0] == '-') && (tar_filename[1] == '\0')) {
830 tar_handle->src_fd = fileno(tar_stream);
831 tar_handle->seek = seek_by_char;
832 } else {
833 tar_handle->src_fd = bb_xopen(tar_filename, flags);
834 }
835 }
836
Rob Landley60fe7bf2005-10-16 03:54:49 +0000837 if ((base_dir) && (chdir(base_dir)))
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000838 bb_perror_msg_and_die("Couldnt chdir to %s", base_dir);
Glenn L McGrath91b3d462003-10-02 14:33:23 +0000839
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000840 /* create an archive */
Rob Landley60fe7bf2005-10-16 03:54:49 +0000841 if (ENABLE_FEATURE_TAR_CREATE && (opt & CTX_CREATE)) {
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000842 int verboseFlag = FALSE;
Rob Landleycc8885f2005-08-30 03:40:03 +0000843 int zipMode = 0;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000844
Rob Landley60fe7bf2005-10-16 03:54:49 +0000845 if (ENABLE_FEATURE_TAR_GZIP && get_header_ptr == get_header_tar_gz)
846 zipMode = 1;
847 if (ENABLE_FEATURE_TAR_BZIP2 && get_header_ptr == get_header_tar_bz2)
848 zipMode = 2;
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000849
Eric Andersenc7bda1c2004-03-15 08:29:22 +0000850 if ((tar_handle->action_header == header_list) ||
Rob Landley60fe7bf2005-10-16 03:54:49 +0000851 (tar_handle->action_header == header_verbose_list))
852 {
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000853 verboseFlag = TRUE;
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000854 }
Glenn L McGrath303e9892004-01-25 05:48:28 +0000855 writeTarFile(tar_handle->src_fd, verboseFlag, opt & TAR_OPT_DEREFERNCE, tar_handle->accept,
Rob Landleycc8885f2005-08-30 03:40:03 +0000856 tar_handle->reject, zipMode);
Rob Landley60fe7bf2005-10-16 03:54:49 +0000857 } else {
Glenn L McGrathe3568832002-11-13 00:24:20 +0000858 while (get_header_ptr(tar_handle) == EXIT_SUCCESS);
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000859
Rob Landley60fe7bf2005-10-16 03:54:49 +0000860 /* Check that every file that should have been extracted was */
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000861 while (tar_handle->accept) {
Rob Landley60fe7bf2005-10-16 03:54:49 +0000862 if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
863 && !find_list_entry(tar_handle->passed, tar_handle->accept->data))
864 {
865 bb_error_msg_and_die("%s: Not found in archive", tar_handle->accept->data);
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000866 }
867 tar_handle->accept = tar_handle->accept->link;
868 }
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000869 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000870
Rob Landley60fe7bf2005-10-16 03:54:49 +0000871 if (ENABLE_FEATURE_CLEAN_UP && tar_handle->src_fd != STDIN_FILENO)
Glenn L McGrath8132e932002-09-28 02:06:39 +0000872 close(tar_handle->src_fd);
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000873
874 return(EXIT_SUCCESS);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000875}