blob: 06851e854aee6978dd346dabe9773d761112f5a9 [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/*
Erik Andersen68a9ea42000-04-04 18:39:50 +00003 * Mini tar implementation for busybox
Erik Andersen6acaa402000-03-26 14:03:20 +00004 *
Glenn L McGrath2e772ed2001-10-05 02:58:48 +00005 * Modifed to use common extraction code used by ar, cpio, dpkg-deb, dpkg
6 * Glenn McGrath <bug1@optushome.com.au>
7 *
Erik Andersen61677fe2000-04-13 01:18:56 +00008 * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
9 * ground up. It still has remnents 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 Andersenbdfd0d72001-10-24 05:00:29 +000012 * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
Eric Andersen1d1d2f92002-04-13 08:31:59 +000013 * Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.org>
Eric Andersen96bcfd31999-11-12 01:30:18 +000014 *
Erik Andersen6acaa402000-03-26 14:03:20 +000015 * Based in part in the tar implementation in sash
16 * Copyright (c) 1999 by David I. Bell
17 * Permission is granted to use, distribute, or modify this source,
18 * provided that this copyright notice remains intact.
19 * Permission to distribute sash derived code under the GPL has been granted.
20 *
Erik Andersen68a9ea42000-04-04 18:39:50 +000021 * Based in part on the tar implementation from busybox-0.28
Erik Andersen6acaa402000-03-26 14:03:20 +000022 * Copyright (C) 1995 Bruce Perens
23 * This is free software under the GNU General Public License.
24 *
Eric Andersenc4996011999-10-20 22:08:37 +000025 * This program is free software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation; either version 2 of the License, or
28 * (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
33 * General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
38 *
Eric Andersencc8ed391999-10-05 16:24:54 +000039 */
40
Eric Andersencc8ed391999-10-05 16:24:54 +000041#include <fcntl.h>
Matt Kraai43c8c382000-09-04 16:51:55 +000042#include <getopt.h>
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000043#include <search.h>
44#include <stdio.h>
Eric Andersened3ef502001-01-27 08:24:39 +000045#include <stdlib.h>
46#include <unistd.h>
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000047#include <fnmatch.h>
48#include <string.h>
49#include <errno.h>
Robert Grieblf2f26e72002-07-23 22:05:47 +000050#include <signal.h>
51#include <sys/wait.h>
52#include <sys/socket.h>
Glenn L McGrathef0eab52001-10-25 14:49:48 +000053#include "unarchive.h"
Eric Andersencbe31da2001-02-20 06:14:08 +000054#include "busybox.h"
Eric Andersencc8ed391999-10-05 16:24:54 +000055
Eric Andersenbdfd0d72001-10-24 05:00:29 +000056#ifdef CONFIG_FEATURE_TAR_CREATE
Eric Andersencc8ed391999-10-05 16:24:54 +000057
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000058/* Tar file constants */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000059# define TAR_MAGIC "ustar" /* ustar and a null */
60# define TAR_VERSION " " /* Be compatable with GNU tar format */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +000061
62# ifndef MAJOR
63# define MAJOR(dev) (((dev)>>8)&0xff)
64# define MINOR(dev) ((dev)&0xff)
65# endif
66
67static const int TAR_BLOCK_SIZE = 512;
68static const int TAR_MAGIC_LEN = 6;
69static const int TAR_VERSION_LEN = 2;
Eric Andersencc8ed391999-10-05 16:24:54 +000070
Erik Andersen298854f2000-03-23 01:09:18 +000071/* POSIX tar Header Block, from POSIX 1003.1-1990 */
Glenn L McGratha0ee8812002-08-22 13:44:08 +000072enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
73struct TarHeader { /* byte offset */
74 char name[NAME_SIZE]; /* 0-99 */
75 char mode[8]; /* 100-107 */
76 char uid[8]; /* 108-115 */
77 char gid[8]; /* 116-123 */
78 char size[12]; /* 124-135 */
79 char mtime[12]; /* 136-147 */
80 char chksum[8]; /* 148-155 */
81 char typeflag; /* 156-156 */
82 char linkname[NAME_SIZE]; /* 157-256 */
83 char magic[6]; /* 257-262 */
84 char version[2]; /* 263-264 */
85 char uname[32]; /* 265-296 */
86 char gname[32]; /* 297-328 */
87 char devmajor[8]; /* 329-336 */
88 char devminor[8]; /* 337-344 */
89 char prefix[155]; /* 345-499 */
90 char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
Erik Andersen298854f2000-03-23 01:09:18 +000091};
92typedef struct TarHeader TarHeader;
Eric Andersencc8ed391999-10-05 16:24:54 +000093
Eric Andersen3d957c82000-12-07 00:34:58 +000094/*
95** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
96** the only functions that deal with the HardLinkInfo structure.
97** Even these functions use the xxxHardLinkInfo() functions.
98*/
99typedef struct HardLinkInfo HardLinkInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000100struct HardLinkInfo {
101 HardLinkInfo *next; /* Next entry in list */
102 dev_t dev; /* Device number */
103 ino_t ino; /* Inode number */
104 short linkCount; /* (Hard) Link Count */
105 char name[1]; /* Start of filename (must be last) */
Eric Andersen3d957c82000-12-07 00:34:58 +0000106};
107
Erik Andersen68a9ea42000-04-04 18:39:50 +0000108/* Some info to be carried along when creating a new tarball */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000109struct TarBallInfo {
110 char *fileName; /* File name of the tarball */
111 int tarFd; /* Open-for-write file descriptor
112 for the tarball */
113 struct stat statBuf; /* Stat info for the tarball, letting
114 us know the inode and device that the
115 tarball lives, so we can avoid trying
116 to include the tarball into itself */
117 int verboseFlag; /* Whether to print extra stuff or not */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000118 const llist_t *excludeList; /* List of files to not include */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000119 HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
120 HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
Erik Andersen68a9ea42000-04-04 18:39:50 +0000121};
122typedef struct TarBallInfo TarBallInfo;
123
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000124/* A nice enum with all the possible tar file content types */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000125enum TarFileType {
126 REGTYPE = '0', /* regular file */
127 REGTYPE0 = '\0', /* regular file (ancient bug compat) */
128 LNKTYPE = '1', /* hard link */
129 SYMTYPE = '2', /* symbolic link */
130 CHRTYPE = '3', /* character special */
131 BLKTYPE = '4', /* block special */
132 DIRTYPE = '5', /* directory */
133 FIFOTYPE = '6', /* FIFO special */
134 CONTTYPE = '7', /* reserved */
135 GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
136 GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000137};
138typedef enum TarFileType TarFileType;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000139
Eric Andersen3d957c82000-12-07 00:34:58 +0000140/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
Glenn L McGrathf66de642002-11-25 23:57:27 +0000141static inline void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
142 struct stat *statbuf,
143 const char *name)
Eric Andersen3d957c82000-12-07 00:34:58 +0000144{
145 /* Note: hlInfoHeadPtr can never be NULL! */
146 HardLinkInfo *hlInfo;
147
Glenn L McGrathf66de642002-11-25 23:57:27 +0000148 hlInfo = (HardLinkInfo *) xmalloc(sizeof(HardLinkInfo) + strlen(name));
149 hlInfo->next = *hlInfoHeadPtr;
150 *hlInfoHeadPtr = hlInfo;
151 hlInfo->dev = statbuf->st_dev;
152 hlInfo->ino = statbuf->st_ino;
153 hlInfo->linkCount = statbuf->st_nlink;
154 strcpy(hlInfo->name, name);
Eric Andersen3d957c82000-12-07 00:34:58 +0000155}
156
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000157static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
Eric Andersen3d957c82000-12-07 00:34:58 +0000158{
159 HardLinkInfo *hlInfo = NULL;
160 HardLinkInfo *hlInfoNext = NULL;
161
162 if (hlInfoHeadPtr) {
163 hlInfo = *hlInfoHeadPtr;
164 while (hlInfo) {
165 hlInfoNext = hlInfo->next;
166 free(hlInfo);
167 hlInfo = hlInfoNext;
168 }
169 *hlInfoHeadPtr = NULL;
170 }
171 return;
172}
173
174/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
Glenn L McGrathf66de642002-11-25 23:57:27 +0000175static inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
Eric Andersen3d957c82000-12-07 00:34:58 +0000176{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000177 while (hlInfo) {
Glenn L McGrathf66de642002-11-25 23:57:27 +0000178 if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
Eric Andersen3d957c82000-12-07 00:34:58 +0000179 break;
180 hlInfo = hlInfo->next;
181 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000182 return (hlInfo);
Eric Andersen3d957c82000-12-07 00:34:58 +0000183}
184
Erik Andersen6acaa402000-03-26 14:03:20 +0000185/* Put an octal string into the specified buffer.
186 * The number is zero and space padded and possibly null padded.
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000187 * Returns TRUE if successful. */
188static int putOctal(char *cp, int len, long value)
Erik Andersen6acaa402000-03-26 14:03:20 +0000189{
190 int tempLength;
Erik Andersen6acaa402000-03-26 14:03:20 +0000191 char tempBuffer[32];
Erik Andersen5661fe02000-04-05 01:00:52 +0000192 char *tempString = tempBuffer;
Erik Andersen6acaa402000-03-26 14:03:20 +0000193
194 /* Create a string of the specified length with an initial space,
195 * leading zeroes and the octal number, and a trailing null. */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000196 sprintf(tempString, "%0*lo", len - 1, value);
Erik Andersen6acaa402000-03-26 14:03:20 +0000197
198 /* If the string is too large, suppress the leading space. */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000199 tempLength = strlen(tempString) + 1;
Erik Andersen6acaa402000-03-26 14:03:20 +0000200 if (tempLength > len) {
201 tempLength--;
202 tempString++;
203 }
204
205 /* If the string is still too large, suppress the trailing null. */
206 if (tempLength > len)
207 tempLength--;
208
209 /* If the string is still too large, fail. */
210 if (tempLength > len)
211 return FALSE;
212
213 /* Copy the string to the field. */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000214 memcpy(cp, tempString, len);
Erik Andersen6acaa402000-03-26 14:03:20 +0000215
216 return TRUE;
217}
218
Erik Andersen68a9ea42000-04-04 18:39:50 +0000219/* Write out a tar header for the specified file/directory/whatever */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000220static inline int writeTarHeader(struct TarBallInfo *tbInfo,
221 const char *header_name,
222 const char *real_name, struct stat *statbuf)
Erik Andersen6acaa402000-03-26 14:03:20 +0000223{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000224 long chksum = 0;
Erik Andersen5661fe02000-04-05 01:00:52 +0000225 struct TarHeader header;
226 const unsigned char *cp = (const unsigned char *) &header;
227 ssize_t size = sizeof(struct TarHeader);
Erik Andersen3364d782000-03-28 00:58:14 +0000228
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000229 memset(&header, 0, size);
230
231 strncpy(header.name, header_name, sizeof(header.name));
Erik Andersenecd51242000-04-08 03:08:21 +0000232
Erik Andersen5661fe02000-04-05 01:00:52 +0000233 putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
234 putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
235 putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000236 putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
Erik Andersen5661fe02000-04-05 01:00:52 +0000237 putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000238 strncpy(header.magic, TAR_MAGIC TAR_VERSION,
239 TAR_MAGIC_LEN + TAR_VERSION_LEN);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000240
Erik Andersen84e09e42000-04-08 20:58:35 +0000241 /* Enter the user and group names (default to root if it fails) */
Eric Andersen02e6ba92002-09-30 20:39:56 +0000242 if (my_getpwuid(header.uname, statbuf->st_uid) == NULL)
Erik Andersen84e09e42000-04-08 20:58:35 +0000243 strcpy(header.uname, "root");
Eric Andersen02e6ba92002-09-30 20:39:56 +0000244 if (my_getgrgid(header.gname, statbuf->st_gid) == NULL)
245 strcpy(header.gname, "root");
Erik Andersen5661fe02000-04-05 01:00:52 +0000246
Eric Andersen3d957c82000-12-07 00:34:58 +0000247 if (tbInfo->hlInfo) {
248 /* This is a hard link */
249 header.typeflag = LNKTYPE;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000250 strncpy(header.linkname, tbInfo->hlInfo->name,
251 sizeof(header.linkname));
Eric Andersen3d957c82000-12-07 00:34:58 +0000252 } else if (S_ISLNK(statbuf->st_mode)) {
Mark Whitley8a633262001-04-30 18:17:00 +0000253 char *lpath = xreadlink(real_name);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000254
255 if (!lpath) /* Already printed err msg inside xreadlink() */
256 return (FALSE);
257 header.typeflag = SYMTYPE;
258 strncpy(header.linkname, lpath, sizeof(header.linkname));
Mark Whitley8a633262001-04-30 18:17:00 +0000259 free(lpath);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000260 } else if (S_ISDIR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000261 header.typeflag = DIRTYPE;
262 strncat(header.name, "/", sizeof(header.name));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000263 } else if (S_ISCHR(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000264 header.typeflag = CHRTYPE;
265 putOctal(header.devmajor, sizeof(header.devmajor),
266 MAJOR(statbuf->st_rdev));
267 putOctal(header.devminor, sizeof(header.devminor),
268 MINOR(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000269 } else if (S_ISBLK(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000270 header.typeflag = BLKTYPE;
271 putOctal(header.devmajor, sizeof(header.devmajor),
272 MAJOR(statbuf->st_rdev));
273 putOctal(header.devminor, sizeof(header.devminor),
274 MINOR(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000275 } else if (S_ISFIFO(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000276 header.typeflag = FIFOTYPE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000277 } else if (S_ISREG(statbuf->st_mode)) {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000278 header.typeflag = REGTYPE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000279 putOctal(header.size, sizeof(header.size), statbuf->st_size);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000280 } else {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000281 bb_error_msg("%s: Unknown file type", real_name);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000282 return (FALSE);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000283 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000284
Eric Andersen77d92682001-05-23 20:32:09 +0000285 /* Calculate and store the checksum (i.e., the sum of all of the bytes of
Erik Andersen5661fe02000-04-05 01:00:52 +0000286 * the header). The checksum field must be filled with blanks for the
287 * calculation. The checksum field is formatted differently from the
288 * other fields: it has [6] digits, a null, then a space -- rather than
289 * digits, followed by a null like the other fields... */
290 memset(header.chksum, ' ', sizeof(header.chksum));
291 cp = (const unsigned char *) &header;
292 while (size-- > 0)
293 chksum += *cp++;
294 putOctal(header.chksum, 7, chksum);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000295
Erik Andersen5661fe02000-04-05 01:00:52 +0000296 /* Now write the header out to disk */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000297 if ((size =
Manuel Novoa III cad53642003-03-19 09:13:01 +0000298 bb_full_write(tbInfo->tarFd, (char *) &header,
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000299 sizeof(struct TarHeader))) < 0) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000300 bb_error_msg(bb_msg_io_error, real_name);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000301 return (FALSE);
Erik Andersen5661fe02000-04-05 01:00:52 +0000302 }
303 /* Pad the header up to the tar block size */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000304 for (; size < TAR_BLOCK_SIZE; size++) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000305 write(tbInfo->tarFd, "\0", 1);
306 }
307 /* Now do the verbose thing (or not) */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000308
Robert Grieblf2f26e72002-07-23 22:05:47 +0000309 if (tbInfo->verboseFlag) {
Eric Andersenfdd51032000-08-02 18:48:26 +0000310 FILE *vbFd = stdout;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000311
312 if (tbInfo->verboseFlag == 2) /* If the archive goes to stdout, verbose to stderr */
Eric Andersenfdd51032000-08-02 18:48:26 +0000313 vbFd = stderr;
314 fprintf(vbFd, "%s\n", header.name);
315 }
Erik Andersen3364d782000-03-28 00:58:14 +0000316
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000317 return (TRUE);
Erik Andersen3364d782000-03-28 00:58:14 +0000318}
319
Eric Andersenc265b172001-10-27 03:20:00 +0000320# if defined CONFIG_FEATURE_TAR_EXCLUDE
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000321static inline int exclude_file(const llist_t *excluded_files, const char *file)
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000322{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000323 if (excluded_files == NULL) {
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000324 return 0;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000325 }
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000326
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000327 while (excluded_files) {
328 if (excluded_files->data[0] == '/') {
329 if (fnmatch(excluded_files->data, file,
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000330 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
331 return 1;
332 } else {
333 const char *p;
334
335 for (p = file; p[0] != '\0'; p++) {
336 if ((p == file || p[-1] == '/') && p[0] != '/' &&
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000337 fnmatch(excluded_files->data, p,
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000338 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
339 return 1;
340 }
341 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000342 excluded_files = excluded_files->link;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000343 }
344
345 return 0;
346}
Eric Andersenc265b172001-10-27 03:20:00 +0000347#endif
Erik Andersen3364d782000-03-28 00:58:14 +0000348
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000349static int writeFileToTarball(const char *fileName, struct stat *statbuf,
350 void *userData)
Erik Andersen3364d782000-03-28 00:58:14 +0000351{
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000352 struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
Matt Kraaie80a2632000-12-19 20:45:49 +0000353 const char *header_name;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000354
Eric Andersen3d957c82000-12-07 00:34:58 +0000355 /*
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000356 ** Check to see if we are dealing with a hard link.
357 ** If so -
358 ** Treat the first occurance of a given dev/inode as a file while
359 ** treating any additional occurances as hard links. This is done
360 ** by adding the file information to the HardLinkInfo linked list.
361 */
Eric Andersen3d957c82000-12-07 00:34:58 +0000362 tbInfo->hlInfo = NULL;
363 if (statbuf->st_nlink > 1) {
Glenn L McGrathf66de642002-11-25 23:57:27 +0000364 tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
Eric Andersen3d957c82000-12-07 00:34:58 +0000365 if (tbInfo->hlInfo == NULL)
Glenn L McGrathf66de642002-11-25 23:57:27 +0000366 addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
Eric Andersen3d957c82000-12-07 00:34:58 +0000367 }
368
Erik Andersen68a9ea42000-04-04 18:39:50 +0000369 /* It is against the rules to archive a socket */
370 if (S_ISSOCK(statbuf->st_mode)) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000371 bb_error_msg("%s: socket ignored", fileName);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000372 return (TRUE);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000373 }
374
375 /* It is a bad idea to store the archive we are in the process of creating,
376 * so check the device and inode to be sure that this particular file isn't
377 * the new tarball */
378 if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000379 tbInfo->statBuf.st_ino == statbuf->st_ino) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000380 bb_error_msg("%s: file is the archive; skipping", fileName);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000381 return (TRUE);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000382 }
383
Matt Kraaie80a2632000-12-19 20:45:49 +0000384 header_name = fileName;
385 while (header_name[0] == '/') {
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000386 static int alreadyWarned = FALSE;
387
388 if (alreadyWarned == FALSE) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000389 bb_error_msg("Removing leading '/' from member names");
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000390 alreadyWarned = TRUE;
Matt Kraaia1f97752000-12-19 06:24:08 +0000391 }
Matt Kraaie80a2632000-12-19 20:45:49 +0000392 header_name++;
Matt Kraaia1f97752000-12-19 06:24:08 +0000393 }
394
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000395 if (strlen(fileName) >= NAME_SIZE) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000396 bb_error_msg(bb_msg_name_longer_than_foo, NAME_SIZE);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000397 return (TRUE);
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000398 }
399
Matt Kraaie80a2632000-12-19 20:45:49 +0000400 if (header_name[0] == '\0')
Matt Kraaia1f97752000-12-19 06:24:08 +0000401 return TRUE;
402
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000403# if defined CONFIG_FEATURE_TAR_EXCLUDE
Matt Kraaibe7499c2001-01-03 17:22:10 +0000404 if (exclude_file(tbInfo->excludeList, header_name)) {
405 return SKIP;
Matt Kraaia1f97752000-12-19 06:24:08 +0000406 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000407# endif /* CONFIG_FEATURE_TAR_EXCLUDE */
Matt Kraaia1f97752000-12-19 06:24:08 +0000408
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000409 if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
410 return (FALSE);
411 }
Erik Andersen5661fe02000-04-05 01:00:52 +0000412
413 /* Now, if the file is a regular file, copy it out to the tarball */
Eric Andersen3d957c82000-12-07 00:34:58 +0000414 if ((tbInfo->hlInfo == NULL)
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000415 && (S_ISREG(statbuf->st_mode))) {
416 int inputFileFd;
Erik Andersen5661fe02000-04-05 01:00:52 +0000417 char buffer[BUFSIZ];
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000418 ssize_t size = 0, readSize = 0;
Erik Andersen5661fe02000-04-05 01:00:52 +0000419
420 /* open the file we want to archive, and make sure all is well */
421 if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000422 bb_perror_msg("%s: Cannot open", fileName);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000423 return (FALSE);
Erik Andersen5661fe02000-04-05 01:00:52 +0000424 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000425
Erik Andersen5661fe02000-04-05 01:00:52 +0000426 /* write the file to the archive */
Manuel Novoa III cad53642003-03-19 09:13:01 +0000427 while ((size = bb_full_read(inputFileFd, buffer, sizeof(buffer))) > 0) {
428 if (bb_full_write(tbInfo->tarFd, buffer, size) != size) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000429 /* Output file seems to have a problem */
Manuel Novoa III cad53642003-03-19 09:13:01 +0000430 bb_error_msg(bb_msg_io_error, fileName);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000431 return (FALSE);
Erik Andersen5661fe02000-04-05 01:00:52 +0000432 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000433 readSize += size;
Erik Andersen5661fe02000-04-05 01:00:52 +0000434 }
435 if (size == -1) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000436 bb_error_msg(bb_msg_io_error, fileName);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000437 return (FALSE);
Erik Andersen5661fe02000-04-05 01:00:52 +0000438 }
439 /* Pad the file up to the tar block size */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000440 for (; (readSize % TAR_BLOCK_SIZE) != 0; readSize++) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000441 write(tbInfo->tarFd, "\0", 1);
442 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000443 close(inputFileFd);
Erik Andersen5661fe02000-04-05 01:00:52 +0000444 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000445
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000446 return (TRUE);
Erik Andersen6acaa402000-03-26 14:03:20 +0000447}
448
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000449static inline int writeTarFile(const char *tarName, const int verboseFlag,
450 const llist_t *include, const llist_t *exclude, const int gzip)
Erik Andersen6acaa402000-03-26 14:03:20 +0000451{
Robert Grieblf2f26e72002-07-23 22:05:47 +0000452#ifdef CONFIG_FEATURE_TAR_GZIP
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000453 int gzipDataPipe[2] = { -1, -1 };
454 int gzipStatusPipe[2] = { -1, -1 };
Robert Grieblf2f26e72002-07-23 22:05:47 +0000455 pid_t gzipPid = 0;
Glenn L McGrathf66de642002-11-25 23:57:27 +0000456 volatile int vfork_exec_errno = 0;
Robert Grieblf2f26e72002-07-23 22:05:47 +0000457#endif
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000458
459 int errorFlag = FALSE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000460 ssize_t size;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000461 struct TarBallInfo tbInfo;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000462
Eric Andersen3d957c82000-12-07 00:34:58 +0000463 tbInfo.hlInfoHead = NULL;
Erik Andersen3364d782000-03-28 00:58:14 +0000464
465 /* Make sure there is at least one file to tar up. */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000466 if (include == NULL) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000467 bb_error_msg_and_die("Cowardly refusing to create an empty archive");
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000468 }
Erik Andersen6acaa402000-03-26 14:03:20 +0000469
470 /* Open the tar file for writing. */
Eric Andersen18921bd2002-10-26 10:05:37 +0000471 if (tarName == NULL || (tarName[0] == '-' && tarName[1] == '\0')) {
Erik Andersen68a9ea42000-04-04 18:39:50 +0000472 tbInfo.tarFd = fileno(stdout);
Robert Grieblf2f26e72002-07-23 22:05:47 +0000473 tbInfo.verboseFlag = verboseFlag ? 2 : 0;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000474 } else {
Glenn L McGrath35a5b082003-04-21 10:07:48 +0000475 unlink(tarName);
476 tbInfo.tarFd = open(tarName, O_WRONLY | O_CREAT | O_EXCL, 0644);
Robert Grieblf2f26e72002-07-23 22:05:47 +0000477 tbInfo.verboseFlag = verboseFlag ? 1 : 0;
478 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000479
Erik Andersen68a9ea42000-04-04 18:39:50 +0000480 if (tbInfo.tarFd < 0) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000481 bb_perror_msg("%s: Cannot open", tarName);
Eric Andersen3d957c82000-12-07 00:34:58 +0000482 freeHardLinkInfo(&tbInfo.hlInfoHead);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000483 return (FALSE);
Erik Andersen6acaa402000-03-26 14:03:20 +0000484 }
Robert Grieblf2f26e72002-07-23 22:05:47 +0000485
Erik Andersen68a9ea42000-04-04 18:39:50 +0000486 /* Store the stat info for the tarball's file, so
487 * can avoid including the tarball into itself.... */
488 if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000489 bb_error_msg_and_die(bb_msg_io_error, tarName);
Erik Andersen6acaa402000-03-26 14:03:20 +0000490
Robert Grieblf2f26e72002-07-23 22:05:47 +0000491#ifdef CONFIG_FEATURE_TAR_GZIP
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000492 if (gzip) {
Glenn L McGrathf66de642002-11-25 23:57:27 +0000493 if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000494 bb_perror_msg_and_die("Failed to create gzip pipe");
Glenn L McGrathf66de642002-11-25 23:57:27 +0000495 }
Robert Grieblf2f26e72002-07-23 22:05:47 +0000496
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000497 signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
Robert Grieblf2f26e72002-07-23 22:05:47 +0000498
Glenn L McGrathf66de642002-11-25 23:57:27 +0000499# if __GNUC__
500 /* Avoid vfork clobbering */
501 (void) &include;
502 (void) &errorFlag;
503# endif
504
505 gzipPid = vfork();
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000506
507 if (gzipPid == 0) {
508 dup2(gzipDataPipe[0], 0);
509 close(gzipDataPipe[1]);
510
511 if (tbInfo.tarFd != 1);
512 dup2(tbInfo.tarFd, 1);
513
514 close(gzipStatusPipe[0]);
515 fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows sucess */
516
517 execl("/bin/gzip", "gzip", "-f", 0);
Glenn L McGrathf66de642002-11-25 23:57:27 +0000518 vfork_exec_errno = errno;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000519
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000520 close(gzipStatusPipe[1]);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000521 exit(-1);
522 } else if (gzipPid > 0) {
523 close(gzipDataPipe[0]);
524 close(gzipStatusPipe[1]);
525
526 while (1) {
Robert Grieblf2f26e72002-07-23 22:05:47 +0000527 char buf;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000528
529 int n = read(gzipStatusPipe[0], &buf, 1);
530
Glenn L McGrathf66de642002-11-25 23:57:27 +0000531 if (n == 0 && vfork_exec_errno != 0) {
532 errno = vfork_exec_errno;
Manuel Novoa III cad53642003-03-19 09:13:01 +0000533 bb_perror_msg_and_die("Could not exec gzip process");
Glenn L McGrathf66de642002-11-25 23:57:27 +0000534 } else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000535 continue; /* try it again */
536 break;
Robert Grieblf2f26e72002-07-23 22:05:47 +0000537 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000538 close(gzipStatusPipe[0]);
539
540 tbInfo.tarFd = gzipDataPipe[1];
541 } else {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000542 bb_perror_msg_and_die("Failed to vfork gzip process");
Robert Grieblf2f26e72002-07-23 22:05:47 +0000543 }
544 }
545#endif
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000546
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000547 tbInfo.excludeList = exclude;
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000548
Erik Andersen6acaa402000-03-26 14:03:20 +0000549 /* Read the directory/files and iterate over them one at a time */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000550 while (include) {
551 if (!recursive_action(include->data, TRUE, FALSE, FALSE,
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000552 writeFileToTarball, writeFileToTarball,
553 (void *) &tbInfo)) {
Erik Andersen68a9ea42000-04-04 18:39:50 +0000554 errorFlag = TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +0000555 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000556 include = include->link;
Erik Andersen6acaa402000-03-26 14:03:20 +0000557 }
Erik Andersen5661fe02000-04-05 01:00:52 +0000558 /* Write two empty blocks to the end of the archive */
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000559 for (size = 0; size < (2 * TAR_BLOCK_SIZE); size++) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000560 write(tbInfo.tarFd, "\0", 1);
561 }
Erik Andersen0817d132000-04-09 15:17:40 +0000562
563 /* To be pedantically correct, we would check if the tarball
Eric Andersen3c5ee9a2000-11-14 22:15:48 +0000564 * is smaller than 20 tar blocks, and pad it if it was smaller,
Erik Andersen0817d132000-04-09 15:17:40 +0000565 * but that isn't necessary for GNU tar interoperability, and
566 * so is considered a waste of space */
567
Erik Andersen68a9ea42000-04-04 18:39:50 +0000568 /* Hang up the tools, close up shop, head home */
Robert Grieblf2f26e72002-07-23 22:05:47 +0000569 close(tbInfo.tarFd);
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000570 if (errorFlag)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000571 bb_error_msg("Error exit delayed from previous errors");
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000572
Eric Andersen3d957c82000-12-07 00:34:58 +0000573 freeHardLinkInfo(&tbInfo.hlInfoHead);
Robert Grieblf2f26e72002-07-23 22:05:47 +0000574
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000575#ifdef CONFIG_FEATURE_TAR_GZIP
576 if (gzip && gzipPid) {
577 if (waitpid(gzipPid, NULL, 0) == -1)
578 printf("Couldnt wait ?");
Robert Grieblf2f26e72002-07-23 22:05:47 +0000579 }
580#endif
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000581
Robert Grieblf2f26e72002-07-23 22:05:47 +0000582 return !errorFlag;
Erik Andersen6acaa402000-03-26 14:03:20 +0000583}
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000584#endif /* tar_create */
Erik Andersen6acaa402000-03-26 14:03:20 +0000585
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000586#ifdef CONFIG_FEATURE_TAR_EXCLUDE
Eric Andersen27cb6842003-06-26 09:07:59 +0000587static llist_t *append_file_list_to_list(llist_t *list)
Glenn L McGrathd642a672001-10-13 06:54:45 +0000588{
Eric Andersen27cb6842003-06-26 09:07:59 +0000589 FILE *src_stream;
590 llist_t *cur = list;
591 llist_t *tmp;
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000592 char *line;
Eric Andersen27cb6842003-06-26 09:07:59 +0000593 llist_t *newlist = NULL;
594
595 while(cur) {
596 src_stream = bb_xfopen(cur->data, "r");
597 tmp = cur;
598 cur = cur->link;
599 free(tmp);
Manuel Novoa III cad53642003-03-19 09:13:01 +0000600 while((line = bb_get_chomped_line_from_file(src_stream)) != NULL) {
Eric Andersen27cb6842003-06-26 09:07:59 +0000601 newlist = llist_add_to(newlist, line);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000602 }
603 fclose(src_stream);
Eric Andersen27cb6842003-06-26 09:07:59 +0000604 }
605 return newlist;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000606}
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000607#endif
Erik Andersen6acaa402000-03-26 14:03:20 +0000608
Eric Andersen27cb6842003-06-26 09:07:59 +0000609
610static const char tar_options[]="ctxjT:X:C:f:Opvz";
Glenn L McGrathec87d372002-11-27 07:52:22 +0000611#define CTX_CREATE 1
612#define CTX_TEST 2
613#define CTX_EXTRACT 4
Eric Andersen27cb6842003-06-26 09:07:59 +0000614#define TAR_OPT_BZIP2 8
615#define TAR_OPT_INCLUDE 16
616#define TAR_OPT_EXCLUDE 32
617#define TAR_OPT_BASEDIR 64
618#define TAR_OPT_ARNAME 128
619#define TAR_OPT_2STDOUT 256
620#define TAR_OPT_P 512
621#define TAR_OPT_VERBOSE 1024
622#define TAR_OPT_GZIP 2048
Glenn L McGrathec87d372002-11-27 07:52:22 +0000623
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000624int tar_main(int argc, char **argv)
625{
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000626 char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000627 archive_handle_t *tar_handle;
628 int opt;
629 char *base_dir = NULL;
Glenn L McGrathf66de642002-11-25 23:57:27 +0000630 const char *tar_filename = "-";
Glenn L McGrathec87d372002-11-27 07:52:22 +0000631 unsigned char ctx_flag = 0;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000632
Glenn L McGrathf6bf7a02002-11-08 07:09:42 +0000633 if (argc < 2) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000634 bb_show_usage();
Glenn L McGrathf6bf7a02002-11-08 07:09:42 +0000635 }
636
Glenn L McGrath934805a2002-10-18 23:59:40 +0000637 /* Prepend '-' to the first argument if required */
638 if (argv[1][0] != '-') {
Eric Andersen27cb6842003-06-26 09:07:59 +0000639 char *tmp;
640
641 bb_xasprintf(&tmp, "-%s", argv[1]);
Glenn L McGrath934805a2002-10-18 23:59:40 +0000642 argv[1] = tmp;
643 }
644
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000645 /* Initialise default values */
646 tar_handle = init_handle();
Glenn L McGrathe2aed7f2003-04-26 13:16:44 +0000647 tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS | ARCHIVE_PRESERVE_DATE;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000648
Eric Andersen27cb6842003-06-26 09:07:59 +0000649 bb_opt_complementaly = "c~tx:t~cx:x~ct:X*";
650 opt = bb_getopt_ulflags(argc, argv, tar_options,
651 NULL, /* T: arg is ignored by default
652 a list is an include list */
653 &(tar_handle->reject),
654 &base_dir, /* Change to dir <optarg> */
655 &tar_filename); /* archive filename */
656 /* Check one and only one context option was given */
657 if(opt & 0x80000000UL)
658 bb_show_usage();
659 ctx_flag = opt & (CTX_CREATE | CTX_TEST | CTX_EXTRACT);
660 if(ctx_flag & CTX_TEST) {
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000661 if ((tar_handle->action_header == header_list) ||
662 (tar_handle->action_header == header_verbose_list)) {
663 tar_handle->action_header = header_verbose_list;
664 } else {
665 tar_handle->action_header = header_list;
666 }
Eric Andersen27cb6842003-06-26 09:07:59 +0000667 }
668 if(ctx_flag & CTX_EXTRACT) {
669 if (tar_handle->action_data != data_extract_to_stdout)
Matt Kraai0861e822003-05-18 21:12:36 +0000670 tar_handle->action_data = data_extract_all;
671 }
Eric Andersen27cb6842003-06-26 09:07:59 +0000672 if(opt & TAR_OPT_2STDOUT) {
673 /* To stdout */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000674 tar_handle->action_data = data_extract_to_stdout;
Eric Andersen27cb6842003-06-26 09:07:59 +0000675 }
676 if(opt & TAR_OPT_VERBOSE) {
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000677 if ((tar_handle->action_header == header_list) ||
678 (tar_handle->action_header == header_verbose_list)) {
679 tar_handle->action_header = header_verbose_list;
680 } else {
681 tar_handle->action_header = header_list;
682 }
Eric Andersen27cb6842003-06-26 09:07:59 +0000683 }
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000684#ifdef CONFIG_FEATURE_TAR_GZIP
Eric Andersen27cb6842003-06-26 09:07:59 +0000685 if(opt & TAR_OPT_GZIP) {
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000686 get_header_ptr = get_header_tar_gz;
Eric Andersen27cb6842003-06-26 09:07:59 +0000687 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000688#endif
689#ifdef CONFIG_FEATURE_TAR_BZIP2
Eric Andersen27cb6842003-06-26 09:07:59 +0000690 if(opt & TAR_OPT_GZIP) {
Glenn L McGrathe3568832002-11-13 00:24:20 +0000691 get_header_ptr = get_header_tar_bz2;
Eric Andersen27cb6842003-06-26 09:07:59 +0000692 }
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000693#endif
Eric Andersen27cb6842003-06-26 09:07:59 +0000694#ifdef CONFIG_FEATURE_TAR_EXCLUDE
695 if(opt & TAR_OPT_EXCLUDE) {
696 tar_handle->reject = append_file_list_to_list(tar_handle->reject);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000697 }
Eric Andersen27cb6842003-06-26 09:07:59 +0000698#endif
Glenn L McGrath29833302002-10-06 23:25:23 +0000699 /* Check if we are reading from stdin */
700 if ((argv[optind]) && (*argv[optind] == '-')) {
701 /* Default is to read from stdin, so just skip to next arg */
Glenn L McGrath8132e932002-09-28 02:06:39 +0000702 optind++;
703 }
704
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000705 /* Setup an array of filenames to work with */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000706 /* TODO: This is the same as in ar, seperate function ? */
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000707 while (optind < argc) {
Glenn L McGrath66125c82002-12-08 00:54:33 +0000708 tar_handle->accept = llist_add_to(tar_handle->accept, argv[optind]);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000709 optind++;
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000710 }
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000711
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000712 if ((tar_handle->accept) || (tar_handle->reject)) {
713 tar_handle->filter = filter_accept_reject_list;
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000714 }
Glenn L McGratha0ee8812002-08-22 13:44:08 +0000715
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000716#ifdef CONFIG_FEATURE_TAR_CREATE
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000717 /* create an archive */
Glenn L McGrathec87d372002-11-27 07:52:22 +0000718 if (ctx_flag == CTX_CREATE) {
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000719 int verboseFlag = FALSE;
Robert Grieblf2f26e72002-07-23 22:05:47 +0000720 int gzipFlag = FALSE;
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000721
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000722# ifdef CONFIG_FEATURE_TAR_GZIP
723 if (get_header_ptr == get_header_tar_gz) {
Robert Grieblf2f26e72002-07-23 22:05:47 +0000724 gzipFlag = TRUE;
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000725 }
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000726# endif /* CONFIG_FEATURE_TAR_GZIP */
727
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000728 if (tar_handle->action_header == header_verbose_list) {
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000729 verboseFlag = TRUE;
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000730 }
731 writeTarFile(tar_filename, verboseFlag, tar_handle->accept,
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000732 tar_handle->reject, gzipFlag);
733 } else
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000734#endif /* CONFIG_FEATURE_TAR_CREATE */
735 {
736 if ((tar_filename[0] == '-') && (tar_filename[1] == '\0')) {
737 tar_handle->src_fd = fileno(stdin);
Glenn L McGrathf6bf7a02002-11-08 07:09:42 +0000738 tar_handle->seek = seek_by_char;
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000739 } else {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000740 tar_handle->src_fd = bb_xopen(tar_filename, O_RDONLY);
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000741 }
Glenn L McGrath26666792002-11-15 08:48:47 +0000742
743 if ((base_dir) && (chdir(base_dir))) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000744 bb_perror_msg_and_die("Couldnt chdir");
Glenn L McGrath26666792002-11-15 08:48:47 +0000745 }
746
Glenn L McGrathe3568832002-11-13 00:24:20 +0000747 while (get_header_ptr(tar_handle) == EXIT_SUCCESS);
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000748
749 /* Ckeck that every file that should have been extracted was */
750 while (tar_handle->accept) {
751 if (find_list_entry(tar_handle->reject, tar_handle->accept->data) == NULL) {
752 if (find_list_entry(tar_handle->passed, tar_handle->accept->data) == NULL) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000753 bb_error_msg_and_die("%s: Not found in archive\n", tar_handle->accept->data);
Glenn L McGrathc5c1a8a2002-10-19 06:19:22 +0000754 }
755 }
756 tar_handle->accept = tar_handle->accept->link;
757 }
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000758 }
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000759
760#ifdef CONFIG_FEATURE_CLEAN_UP
Glenn L McGrath8132e932002-09-28 02:06:39 +0000761 if (tar_handle->src_fd != fileno(stdin)) {
762 close(tar_handle->src_fd);
763 }
Glenn L McGrath98f824a2002-10-19 00:46:35 +0000764#endif /* CONFIG_FEATURE_CLEAN_UP */
Glenn L McGrath7ca04f32002-09-25 02:47:48 +0000765
766 return(EXIT_SUCCESS);
Glenn L McGrath2e772ed2001-10-05 02:58:48 +0000767}