blob: 4bf8004eafad45f56f9fd5b79e951646ac32ac4f [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 *
Erik Andersen61677fe2000-04-13 01:18:56 +00005 * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
6 * ground up. It still has remnents of the old code lying about, but it is
7 * very different now (i.e. cleaner, less global variables, etc)
Eric Andersenc4996011999-10-20 22:08:37 +00008 *
Eric Andersen8ec10a92001-01-27 09:33:39 +00009 * Copyright (C) 1999,2000,2001 by Lineo, inc.
Erik Andersen1ad302a2000-03-24 00:54:46 +000010 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
Eric Andersen96bcfd31999-11-12 01:30:18 +000011 *
Erik Andersen6acaa402000-03-26 14:03:20 +000012 * Based in part in the tar implementation in sash
13 * Copyright (c) 1999 by David I. Bell
14 * Permission is granted to use, distribute, or modify this source,
15 * provided that this copyright notice remains intact.
16 * Permission to distribute sash derived code under the GPL has been granted.
17 *
Erik Andersen68a9ea42000-04-04 18:39:50 +000018 * Based in part on the tar implementation from busybox-0.28
Erik Andersen6acaa402000-03-26 14:03:20 +000019 * Copyright (C) 1995 Bruce Perens
20 * This is free software under the GNU General Public License.
21 *
Eric Andersenc4996011999-10-20 22:08:37 +000022 * This program is free software; you can redistribute it and/or modify
23 * it under the terms of the GNU General Public License as published by
24 * the Free Software Foundation; either version 2 of the License, or
25 * (at your option) any later version.
26 *
27 * This program is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
30 * General Public License for more details.
31 *
32 * You should have received a copy of the GNU General Public License
33 * along with this program; if not, write to the Free Software
34 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
35 *
Eric Andersencc8ed391999-10-05 16:24:54 +000036 */
37
38
Eric Andersencc8ed391999-10-05 16:24:54 +000039#include <stdio.h>
40#include <dirent.h>
41#include <errno.h>
42#include <fcntl.h>
43#include <signal.h>
44#include <time.h>
Erik Andersen7dc16072000-01-04 01:10:25 +000045#include <utime.h>
Eric Andersen96bcfd31999-11-12 01:30:18 +000046#include <sys/types.h>
Eric Andersen08b10341999-11-19 02:38:58 +000047#include <sys/sysmacros.h>
Matt Kraai43c8c382000-09-04 16:51:55 +000048#include <getopt.h>
Matt Kraaibe7499c2001-01-03 17:22:10 +000049#include <fnmatch.h>
Eric Andersened3ef502001-01-27 08:24:39 +000050#include <string.h>
51#include <stdlib.h>
52#include <unistd.h>
Eric Andersencbe31da2001-02-20 06:14:08 +000053#include "busybox.h"
Eric Andersencc8ed391999-10-05 16:24:54 +000054
Erik Andersen298854f2000-03-23 01:09:18 +000055/* Tar file constants */
Erik Andersen1ad302a2000-03-24 00:54:46 +000056#ifndef MAJOR
57#define MAJOR(dev) (((dev)>>8)&0xff)
58#define MINOR(dev) ((dev)&0xff)
59#endif
Eric Andersencc8ed391999-10-05 16:24:54 +000060
Mark Whitley59ab0252001-01-23 22:30:04 +000061enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
Eric Andersencc8ed391999-10-05 16:24:54 +000062
Erik Andersen298854f2000-03-23 01:09:18 +000063/* POSIX tar Header Block, from POSIX 1003.1-1990 */
64struct TarHeader
65{
66 /* byte offset */
Eric Andersen1b1cfde2000-09-24 00:54:37 +000067 char name[NAME_SIZE]; /* 0-99 */
Erik Andersen0817d132000-04-09 15:17:40 +000068 char mode[8]; /* 100-107 */
69 char uid[8]; /* 108-115 */
70 char gid[8]; /* 116-123 */
71 char size[12]; /* 124-135 */
72 char mtime[12]; /* 136-147 */
73 char chksum[8]; /* 148-155 */
74 char typeflag; /* 156-156 */
Eric Andersen1b1cfde2000-09-24 00:54:37 +000075 char linkname[NAME_SIZE]; /* 157-256 */
Erik Andersen0817d132000-04-09 15:17:40 +000076 char magic[6]; /* 257-262 */
77 char version[2]; /* 263-264 */
78 char uname[32]; /* 265-296 */
79 char gname[32]; /* 297-328 */
80 char devmajor[8]; /* 329-336 */
81 char devminor[8]; /* 337-344 */
82 char prefix[155]; /* 345-499 */
83 char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
Erik Andersen298854f2000-03-23 01:09:18 +000084};
85typedef struct TarHeader TarHeader;
Eric Andersencc8ed391999-10-05 16:24:54 +000086
Eric Andersencc8ed391999-10-05 16:24:54 +000087
Erik Andersen298854f2000-03-23 01:09:18 +000088/* A few useful constants */
89#define TAR_MAGIC "ustar" /* ustar and a null */
Erik Andersen0817d132000-04-09 15:17:40 +000090#define TAR_VERSION " " /* Be compatable with GNU tar format */
Mark Whitley59ab0252001-01-23 22:30:04 +000091static const int TAR_MAGIC_LEN = 6;
92static const int TAR_VERSION_LEN = 2;
93static const int TAR_BLOCK_SIZE = 512;
Erik Andersen298854f2000-03-23 01:09:18 +000094
95/* A nice enum with all the possible tar file content types */
96enum TarFileType
97{
98 REGTYPE = '0', /* regular file */
99 REGTYPE0 = '\0', /* regular file (ancient bug compat)*/
100 LNKTYPE = '1', /* hard link */
101 SYMTYPE = '2', /* symbolic link */
102 CHRTYPE = '3', /* character special */
103 BLKTYPE = '4', /* block special */
104 DIRTYPE = '5', /* directory */
105 FIFOTYPE = '6', /* FIFO special */
106 CONTTYPE = '7', /* reserved */
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000107 GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
108 GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
Erik Andersen298854f2000-03-23 01:09:18 +0000109};
110typedef enum TarFileType TarFileType;
111
112/* This struct ignores magic, non-numeric user name,
113 * non-numeric group name, and the checksum, since
114 * these are all ignored by BusyBox tar. */
115struct TarInfo
116{
117 int tarFd; /* An open file descriptor for reading from the tarball */
118 char * name; /* File name */
119 mode_t mode; /* Unix mode, including device bits. */
120 uid_t uid; /* Numeric UID */
121 gid_t gid; /* Numeric GID */
122 size_t size; /* Size of file */
123 time_t mtime; /* Last-modified time */
124 enum TarFileType type; /* Regular, directory, link, etc */
125 char * linkname; /* Name for symbolic and hard links */
Erik Andersen1ad302a2000-03-24 00:54:46 +0000126 long devmajor; /* Major number for special device */
127 long devminor; /* Minor number for special device */
Erik Andersen298854f2000-03-23 01:09:18 +0000128};
129typedef struct TarInfo TarInfo;
130
Erik Andersene454fb62000-03-23 04:27:58 +0000131/* Local procedures to restore files from a tar file. */
Glenn L McGrath2975a342001-04-11 16:49:07 +0000132static int readTarFile(int tarFd, int extractFlag, int listFlag,
Matt Kraaib92223b2000-09-04 08:25:42 +0000133 int tostdoutFlag, int verboseFlag, char** extractList,
134 char** excludeList);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000135
Erik Andersen05100cd2000-01-16 01:30:52 +0000136#ifdef BB_FEATURE_TAR_CREATE
Erik Andersen6acaa402000-03-26 14:03:20 +0000137/* Local procedures to save files into a tar file. */
Matt Kraaid8ad76c2000-11-08 02:35:47 +0000138static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
139 char** excludeList);
Erik Andersen05100cd2000-01-16 01:30:52 +0000140#endif
141
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000142#if defined BB_FEATURE_TAR_EXCLUDE
Eric Andersen3e6ff902001-03-09 21:24:12 +0000143static struct option longopts[] = {
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000144 { "exclude", 1, NULL, 'e' },
145 { NULL, 0, NULL, 0 }
146};
147#endif
148
Erik Andersene49d5ec2000-02-08 19:58:47 +0000149extern int tar_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +0000150{
Erik Andersenecd51242000-04-08 03:08:21 +0000151 char** excludeList=NULL;
Matt Kraaic119ab92000-11-30 04:44:54 +0000152 char** extractList=NULL;
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000153 const char *tarName="-";
Erik Andersen0817d132000-04-09 15:17:40 +0000154#if defined BB_FEATURE_TAR_EXCLUDE
Erik Andersenecd51242000-04-08 03:08:21 +0000155 int excludeListSize=0;
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000156 FILE *fileList;
157 char file[256];
Erik Andersen0817d132000-04-09 15:17:40 +0000158#endif
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000159#if defined BB_FEATURE_TAR_GZIP
Glenn L McGrath018e9e62001-03-28 07:27:26 +0000160 FILE *comp_file = NULL;
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000161 int unzipFlag = FALSE;
162#endif
Erik Andersen298854f2000-03-23 01:09:18 +0000163 int listFlag = FALSE;
164 int extractFlag = FALSE;
165 int createFlag = FALSE;
166 int verboseFlag = FALSE;
167 int tostdoutFlag = FALSE;
Eric Andersen02f3b2e2000-12-01 19:04:52 +0000168 int status = FALSE;
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000169 int opt;
Glenn L McGrath018e9e62001-03-28 07:27:26 +0000170 pid_t pid;
Eric Andersencc8ed391999-10-05 16:24:54 +0000171
Erik Andersenecd51242000-04-08 03:08:21 +0000172 if (argc <= 1)
Eric Andersen67991cf2001-02-14 21:23:06 +0000173 show_usage();
Eric Andersencc8ed391999-10-05 16:24:54 +0000174
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000175 if (argv[1][0] != '-') {
176 char *tmp = xmalloc(strlen(argv[1]) + 2);
177 tmp[0] = '-';
178 strcpy(tmp + 1, argv[1]);
179 argv[1] = tmp;
180 }
181
182 while (
183#ifndef BB_FEATURE_TAR_EXCLUDE
184 (opt = getopt(argc, argv, "cxtzvOf:"))
185#else
186 (opt = getopt_long(argc, argv, "cxtzvOf:X:", longopts, NULL))
187#endif
188 > 0) {
189 switch (opt) {
190 case 'c':
191 if (extractFlag == TRUE || listFlag == TRUE)
192 goto flagError;
193 createFlag = TRUE;
194 break;
195 case 'x':
196 if (listFlag == TRUE || createFlag == TRUE)
197 goto flagError;
198 extractFlag = TRUE;
199 break;
200 case 't':
201 if (extractFlag == TRUE || createFlag == TRUE)
202 goto flagError;
203 listFlag = TRUE;
204 break;
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000205#ifdef BB_FEATURE_TAR_GZIP
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000206 case 'z':
207 unzipFlag = TRUE;
208 break;
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000209#endif
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000210 case 'v':
211 verboseFlag = TRUE;
212 break;
213 case 'O':
214 tostdoutFlag = TRUE;
215 break;
216 case 'f':
217 if (*tarName != '-')
Matt Kraaidd19c692001-01-31 19:00:21 +0000218 error_msg_and_die( "Only one 'f' option allowed");
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000219 tarName = optarg;
220 break;
Erik Andersen0817d132000-04-09 15:17:40 +0000221#if defined BB_FEATURE_TAR_EXCLUDE
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000222 case 'e':
223 excludeList=xrealloc( excludeList,
224 sizeof(char *) * (excludeListSize+2));
225 excludeList[excludeListSize] = optarg;
226 /* Tack a NULL onto the end of the list */
227 excludeList[++excludeListSize] = NULL;
228 case 'X':
229 fileList = xfopen(optarg, "r");
230 while (fgets(file, sizeof(file), fileList) != NULL) {
231 excludeList = xrealloc(excludeList,
232 sizeof(char *) * (excludeListSize+2));
Matt Kraai05e782d2001-02-01 16:49:30 +0000233 chomp(file);
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000234 excludeList[excludeListSize] = xstrdup(file);
235 /* Tack a NULL onto the end of the list */
236 excludeList[++excludeListSize] = NULL;
237 }
238 fclose(fileList);
239 break;
Erik Andersen0817d132000-04-09 15:17:40 +0000240#endif
Erik Andersenecd51242000-04-08 03:08:21 +0000241 default:
Eric Andersen67991cf2001-02-14 21:23:06 +0000242 show_usage();
Erik Andersene49d5ec2000-02-08 19:58:47 +0000243 }
Eric Andersencc8ed391999-10-05 16:24:54 +0000244 }
245
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000246 /*
Erik Andersene49d5ec2000-02-08 19:58:47 +0000247 * Do the correct type of action supplying the rest of the
248 * command line arguments as the list of files to process.
249 */
250 if (createFlag == TRUE) {
Erik Andersende552872000-01-23 01:34:05 +0000251#ifndef BB_FEATURE_TAR_CREATE
Matt Kraaidd19c692001-01-31 19:00:21 +0000252 error_msg_and_die( "This version of tar was not compiled with tar creation support.");
Erik Andersende552872000-01-23 01:34:05 +0000253#else
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000254#ifdef BB_FEATURE_TAR_GZIP
255 if (unzipFlag==TRUE)
Matt Kraaidd19c692001-01-31 19:00:21 +0000256 error_msg_and_die("Creation of compressed not internally support by tar, pipe to busybox gunzip");
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000257#endif
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000258 status = writeTarFile(tarName, verboseFlag, argv + optind, excludeList);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000259#endif
Erik Andersen8ea7d8c2000-05-20 00:40:08 +0000260 }
261 if (listFlag == TRUE || extractFlag == TRUE) {
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000262 int tarFd;
Matt Kraai3b3f5c32001-01-22 20:49:00 +0000263 if (argv[optind])
264 extractList = argv + optind;
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000265 /* Open the tar file for reading. */
266 if (!strcmp(tarName, "-"))
267 tarFd = fileno(stdin);
268 else
269 tarFd = open(tarName, O_RDONLY);
270 if (tarFd < 0)
Matt Kraai1fa1ade2000-12-18 03:57:16 +0000271 perror_msg_and_die("Error opening '%s'", tarName);
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000272
273#ifdef BB_FEATURE_TAR_GZIP
274 /* unzip tarFd in a seperate process */
Glenn L McGrath018e9e62001-03-28 07:27:26 +0000275 if (unzipFlag == TRUE) {
276 comp_file = fdopen(tarFd, "r");
Glenn L McGrath018e9e62001-03-28 07:27:26 +0000277 if ((tarFd = gz_open(comp_file, &pid)) == EXIT_FAILURE) {
278 error_msg_and_die("Couldnt unzip file");
279 }
Glenn L McGrath018e9e62001-03-28 07:27:26 +0000280 }
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000281#endif
282 status = readTarFile(tarFd, extractFlag, listFlag, tostdoutFlag,
Matt Kraai3e856ce2000-12-01 02:55:13 +0000283 verboseFlag, extractList, excludeList);
Glenn L McGrath018e9e62001-03-28 07:27:26 +0000284 close(tarFd);
Glenn L McGrath018e9e62001-03-28 07:27:26 +0000285#ifdef BB_FEATURE_TAR_GZIP
Glenn L McGrathae8ad352001-03-28 23:57:51 +0000286 if (unzipFlag == TRUE) {
287 gz_close(pid);
288 fclose(comp_file);
289 }
Glenn L McGrath018e9e62001-03-28 07:27:26 +0000290#endif
Glenn L McGrathae8ad352001-03-28 23:57:51 +0000291 }
Glenn L McGrath018e9e62001-03-28 07:27:26 +0000292
Matt Kraai3e856ce2000-12-01 02:55:13 +0000293 if (status == TRUE)
294 return EXIT_SUCCESS;
295 else
296 return EXIT_FAILURE;
297
Erik Andersene49d5ec2000-02-08 19:58:47 +0000298 flagError:
Matt Kraaidd19c692001-01-31 19:00:21 +0000299 error_msg_and_die( "Exactly one of 'c', 'x' or 't' must be specified");
Erik Andersen298854f2000-03-23 01:09:18 +0000300}
301
302static void
Erik Andersen6a34b532000-04-07 06:55:38 +0000303fixUpPermissions(TarInfo *header)
304{
305 struct utimbuf t;
306 /* Now set permissions etc for the new file */
307 chown(header->name, header->uid, header->gid);
308 chmod(header->name, header->mode);
309 /* Reset the time */
310 t.actime = time(0);
311 t.modtime = header->mtime;
312 utime(header->name, &t);
313}
314
315static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000316tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersen298854f2000-03-23 01:09:18 +0000317{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000318 size_t writeSize;
319 size_t readSize;
320 size_t actualWriteSz;
321 char buffer[BUFSIZ];
322 size_t size = header->size;
323 int outFd=fileno(stdout);
324
325 /* Open the file to be written, if a file is supposed to be written */
326 if (extractFlag==TRUE && tostdoutFlag==FALSE) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000327 /* Create the path to the file, just in case it isn't there...
328 * This should not screw up path permissions or anything. */
Mark Whitleyf57c9442000-12-07 19:56:48 +0000329 create_path(header->name, 0777);
Eric Andersen0c6a9702000-06-09 20:51:50 +0000330 if ((outFd=open(header->name, O_CREAT|O_TRUNC|O_WRONLY,
331 header->mode & ~S_IFMT)) < 0) {
Mark Whitleyf57c9442000-12-07 19:56:48 +0000332 error_msg(io_error, header->name, strerror(errno));
Eric Andersen0c6a9702000-06-09 20:51:50 +0000333 return( FALSE);
334 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000335 }
336
337 /* Write out the file, if we are supposed to be doing that */
338 while ( size > 0 ) {
339 actualWriteSz=0;
340 if ( size > sizeof(buffer) )
341 writeSize = readSize = sizeof(buffer);
342 else {
343 int mod = size % 512;
344 if ( mod != 0 )
345 readSize = size + (512 - mod);
346 else
347 readSize = size;
348 writeSize = size;
349 }
Mark Whitleyf57c9442000-12-07 19:56:48 +0000350 if ( (readSize = full_read(header->tarFd, buffer, readSize)) <= 0 ) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000351 /* Tarball seems to have a problem */
Matt Kraaidd19c692001-01-31 19:00:21 +0000352 error_msg("Unexpected EOF in archive");
Erik Andersen6a34b532000-04-07 06:55:38 +0000353 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000354 }
355 if ( readSize < writeSize )
356 writeSize = readSize;
357
358 /* Write out the file, if we are supposed to be doing that */
359 if (extractFlag==TRUE) {
360
Mark Whitleyf57c9442000-12-07 19:56:48 +0000361 if ((actualWriteSz=full_write(outFd, buffer, writeSize)) != writeSize ) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000362 /* Output file seems to have a problem */
Mark Whitleyf57c9442000-12-07 19:56:48 +0000363 error_msg(io_error, header->name, strerror(errno));
Erik Andersen6a34b532000-04-07 06:55:38 +0000364 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000365 }
Erik Andersen0817d132000-04-09 15:17:40 +0000366 } else {
367 actualWriteSz=writeSize;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000368 }
369
370 size -= actualWriteSz;
371 }
372
373 /* Now we are done writing the file out, so try
374 * and fix up the permissions and whatnot */
375 if (extractFlag==TRUE && tostdoutFlag==FALSE) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000376 close(outFd);
Erik Andersen6a34b532000-04-07 06:55:38 +0000377 fixUpPermissions(header);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000378 }
Erik Andersen6a34b532000-04-07 06:55:38 +0000379 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000380}
381
Erik Andersen6a34b532000-04-07 06:55:38 +0000382static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000383tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersene454fb62000-03-23 04:27:58 +0000384{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000385
386 if (extractFlag==FALSE || tostdoutFlag==TRUE)
Erik Andersen6a34b532000-04-07 06:55:38 +0000387 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000388
Mark Whitleyf57c9442000-12-07 19:56:48 +0000389 if (create_path(header->name, header->mode) != TRUE) {
Matt Kraai1fa1ade2000-12-18 03:57:16 +0000390 perror_msg("%s: Cannot mkdir", header->name);
Erik Andersen6a34b532000-04-07 06:55:38 +0000391 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000392 }
393 /* make the final component, just in case it was
Mark Whitleyf57c9442000-12-07 19:56:48 +0000394 * omitted by create_path() (which will skip the
Erik Andersen1ad302a2000-03-24 00:54:46 +0000395 * directory if it doesn't have a terminating '/') */
Matt Kraai541ffe32001-01-13 21:46:25 +0000396 if (mkdir(header->name, header->mode) < 0 && errno != EEXIST) {
397 perror_msg("%s", header->name);
398 return FALSE;
Erik Andersen6acaa402000-03-26 14:03:20 +0000399 }
Matt Kraai541ffe32001-01-13 21:46:25 +0000400
401 fixUpPermissions(header);
Erik Andersen6a34b532000-04-07 06:55:38 +0000402 return( TRUE);
Erik Andersene454fb62000-03-23 04:27:58 +0000403}
404
Erik Andersen6a34b532000-04-07 06:55:38 +0000405static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000406tarExtractHardLink(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersene454fb62000-03-23 04:27:58 +0000407{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000408 if (extractFlag==FALSE || tostdoutFlag==TRUE)
Erik Andersen6a34b532000-04-07 06:55:38 +0000409 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000410
411 if (link(header->linkname, header->name) < 0) {
Matt Kraai1fa1ade2000-12-18 03:57:16 +0000412 perror_msg("%s: Cannot create hard link to '%s'", header->name,
413 header->linkname);
Erik Andersen6a34b532000-04-07 06:55:38 +0000414 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000415 }
416
417 /* Now set permissions etc for the new directory */
418 fixUpPermissions(header);
Erik Andersen6a34b532000-04-07 06:55:38 +0000419 return( TRUE);
Erik Andersene454fb62000-03-23 04:27:58 +0000420}
421
Erik Andersen6a34b532000-04-07 06:55:38 +0000422static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000423tarExtractSymLink(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersene454fb62000-03-23 04:27:58 +0000424{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000425 if (extractFlag==FALSE || tostdoutFlag==TRUE)
Erik Andersen6a34b532000-04-07 06:55:38 +0000426 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000427
428#ifdef S_ISLNK
429 if (symlink(header->linkname, header->name) < 0) {
Matt Kraai1fa1ade2000-12-18 03:57:16 +0000430 perror_msg("%s: Cannot create symlink to '%s'", header->name,
431 header->linkname);
Erik Andersen6a34b532000-04-07 06:55:38 +0000432 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000433 }
434 /* Try to change ownership of the symlink.
435 * If libs doesn't support that, don't bother.
436 * Changing the pointed-to-file is the Wrong Thing(tm).
437 */
438#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
439 lchown(header->name, header->uid, header->gid);
440#endif
441
442 /* Do not change permissions or date on symlink,
443 * since it changes the pointed to file instead. duh. */
444#else
Matt Kraaidd19c692001-01-31 19:00:21 +0000445 error_msg("%s: Cannot create symlink to '%s': %s",
Erik Andersen6a34b532000-04-07 06:55:38 +0000446 header->name, header->linkname,
447 "symlinks not supported");
Erik Andersen1ad302a2000-03-24 00:54:46 +0000448#endif
Erik Andersen6a34b532000-04-07 06:55:38 +0000449 return( TRUE);
Erik Andersene454fb62000-03-23 04:27:58 +0000450}
451
Erik Andersen6a34b532000-04-07 06:55:38 +0000452static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000453tarExtractSpecial(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersene454fb62000-03-23 04:27:58 +0000454{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000455 if (extractFlag==FALSE || tostdoutFlag==TRUE)
Erik Andersen6a34b532000-04-07 06:55:38 +0000456 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000457
458 if (S_ISCHR(header->mode) || S_ISBLK(header->mode) || S_ISSOCK(header->mode)) {
Erik Andersen6a34b532000-04-07 06:55:38 +0000459 if (mknod(header->name, header->mode, makedev(header->devmajor, header->devminor)) < 0) {
Matt Kraai1fa1ade2000-12-18 03:57:16 +0000460 perror_msg("%s: Cannot mknod", header->name);
Erik Andersen6a34b532000-04-07 06:55:38 +0000461 return( FALSE);
462 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000463 } else if (S_ISFIFO(header->mode)) {
Erik Andersen6a34b532000-04-07 06:55:38 +0000464 if (mkfifo(header->name, header->mode) < 0) {
Matt Kraai1fa1ade2000-12-18 03:57:16 +0000465 perror_msg("%s: Cannot mkfifo", header->name);
Erik Andersen6a34b532000-04-07 06:55:38 +0000466 return( FALSE);
467 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000468 }
469
470 /* Now set permissions etc for the new directory */
471 fixUpPermissions(header);
Erik Andersen6a34b532000-04-07 06:55:38 +0000472 return( TRUE);
Erik Andersene454fb62000-03-23 04:27:58 +0000473}
474
Erik Andersen298854f2000-03-23 01:09:18 +0000475/* Parse the tar header and fill in the nice struct with the details */
476static int
Erik Andersen3364d782000-03-28 00:58:14 +0000477readTarHeader(struct TarHeader *rawHeader, struct TarInfo *header)
Erik Andersen298854f2000-03-23 01:09:18 +0000478{
Erik Andersene454fb62000-03-23 04:27:58 +0000479 int i;
Erik Andersen84e09e42000-04-08 20:58:35 +0000480 long chksum, sum=0;
Erik Andersene454fb62000-03-23 04:27:58 +0000481 unsigned char *s = (unsigned char *)rawHeader;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000482
Erik Andersen298854f2000-03-23 01:09:18 +0000483 header->name = rawHeader->name;
Erik Andersen84e09e42000-04-08 20:58:35 +0000484 /* Check for and relativify any absolute paths */
485 if ( *(header->name) == '/' ) {
486 static int alreadyWarned=FALSE;
487
488 while (*(header->name) == '/')
489 ++*(header->name);
490
491 if (alreadyWarned == FALSE) {
Matt Kraaidd19c692001-01-31 19:00:21 +0000492 error_msg("Removing leading '/' from member names");
Erik Andersen84e09e42000-04-08 20:58:35 +0000493 alreadyWarned = TRUE;
494 }
495 }
496
Glenn L McGrath48081f82001-04-11 05:01:09 +0000497 header->mode = strtol(rawHeader->mode, NULL, 8);
498 header->uid = strtol(rawHeader->uid, NULL, 8);
499 header->gid = strtol(rawHeader->gid, NULL, 8);
500 header->size = strtol(rawHeader->size, NULL, 8);
501 header->mtime = strtol(rawHeader->mtime, NULL, 8);
502 chksum = strtol(rawHeader->chksum, NULL, 8);
Erik Andersen298854f2000-03-23 01:09:18 +0000503 header->type = rawHeader->typeflag;
504 header->linkname = rawHeader->linkname;
Glenn L McGrath48081f82001-04-11 05:01:09 +0000505 header->devmajor = strtol(rawHeader->devmajor, NULL, 8);
506 header->devminor = strtol(rawHeader->devminor, NULL, 8);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000507
Erik Andersen298854f2000-03-23 01:09:18 +0000508 /* Check the checksum */
Erik Andersen84e09e42000-04-08 20:58:35 +0000509 for (i = sizeof(*rawHeader); i-- != 0;) {
Erik Andersen298854f2000-03-23 01:09:18 +0000510 sum += *s++;
Erik Andersen84e09e42000-04-08 20:58:35 +0000511 }
512 /* Remove the effects of the checksum field (replace
513 * with blanks for the purposes of the checksum) */
514 s = rawHeader->chksum;
515 for (i = sizeof(rawHeader->chksum) ; i-- != 0;) {
516 sum -= *s++;
517 }
518 sum += ' ' * sizeof(rawHeader->chksum);
Erik Andersene454fb62000-03-23 04:27:58 +0000519 if (sum == chksum )
Erik Andersen298854f2000-03-23 01:09:18 +0000520 return ( TRUE);
521 return( FALSE);
522}
Erik Andersene49d5ec2000-02-08 19:58:47 +0000523
Eric Andersen3e6ff902001-03-09 21:24:12 +0000524static int exclude_file(char **excluded_files, const char *file)
Matt Kraaibe7499c2001-01-03 17:22:10 +0000525{
526 int i;
527
528 if (excluded_files == NULL)
529 return 0;
530
531 for (i = 0; excluded_files[i] != NULL; i++) {
532 if (excluded_files[i][0] == '/') {
533 if (fnmatch(excluded_files[i], file,
534 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
535 return 1;
536 } else {
537 const char *p;
538
539 for (p = file; p[0] != '\0'; p++) {
540 if ((p == file || p[-1] == '/') && p[0] != '/' &&
541 fnmatch(excluded_files[i], p,
542 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
543 return 1;
544 }
545 }
546 }
547
548 return 0;
549}
Erik Andersene49d5ec2000-02-08 19:58:47 +0000550
Eric Andersen3e6ff902001-03-09 21:24:12 +0000551static int extract_file(char **extract_files, const char *file)
Matt Kraai8f8dab92001-01-22 05:25:19 +0000552{
553 int i;
554
555 if (extract_files == NULL)
556 return 1;
557
558 for (i = 0; extract_files[i] != NULL; i++) {
559 if (fnmatch(extract_files[i], file, FNM_LEADING_DIR) == 0)
560 return 1;
561 }
562
563 return 0;
564}
565
Erik Andersen1ad302a2000-03-24 00:54:46 +0000566/*
567 * Read a tar file and extract or list the specified files within it.
568 * If the list is empty than all files are extracted or listed.
569 */
Glenn L McGrath2975a342001-04-11 16:49:07 +0000570static int readTarFile(int tarFd, int extractFlag, int listFlag,
Matt Kraaib92223b2000-09-04 08:25:42 +0000571 int tostdoutFlag, int verboseFlag, char** extractList,
572 char** excludeList)
Erik Andersen1ad302a2000-03-24 00:54:46 +0000573{
Glenn L McGrath46f44d22000-12-10 01:57:30 +0000574 int status;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000575 int errorFlag=FALSE;
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000576 int skipNextHeaderFlag=FALSE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000577 TarHeader rawHeader;
578 TarInfo header;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000579
Erik Andersene49d5ec2000-02-08 19:58:47 +0000580 /* Set the umask for this process so it doesn't
Erik Andersen1ad302a2000-03-24 00:54:46 +0000581 * screw up permission setting for us later. */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000582 umask(0);
Eric Andersencc8ed391999-10-05 16:24:54 +0000583
Erik Andersen1ad302a2000-03-24 00:54:46 +0000584 /* Read the tar file, and iterate over it one file at a time */
Mark Whitleyf57c9442000-12-07 19:56:48 +0000585 while ( (status = full_read(tarFd, (char*)&rawHeader, TAR_BLOCK_SIZE)) == TAR_BLOCK_SIZE ) {
Erik Andersene2729152000-02-18 21:34:17 +0000586
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000587 /* Try to read the header */
Erik Andersen3364d782000-03-28 00:58:14 +0000588 if ( readTarHeader(&rawHeader, &header) == FALSE ) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000589 if ( *(header.name) == '\0' ) {
590 goto endgame;
591 } else {
592 errorFlag=TRUE;
Matt Kraaidd19c692001-01-31 19:00:21 +0000593 error_msg("Bad tar header, skipping");
Erik Andersen1ad302a2000-03-24 00:54:46 +0000594 continue;
595 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000596 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000597 if ( *(header.name) == '\0' )
598 goto endgame;
Erik Andersen0817d132000-04-09 15:17:40 +0000599 header.tarFd = tarFd;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000600
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000601 /* Skip funky extra GNU headers that precede long files */
602 if ( (header.type == GNULONGNAME) || (header.type == GNULONGLINK) ) {
603 skipNextHeaderFlag=TRUE;
Matt Kraaiab8f9e22000-11-18 01:28:57 +0000604 if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
605 errorFlag = TRUE;
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000606 continue;
607 }
608 if ( skipNextHeaderFlag == TRUE ) {
609 skipNextHeaderFlag=FALSE;
Mark Whitleyf57c9442000-12-07 19:56:48 +0000610 error_msg(name_longer_than_foo, NAME_SIZE);
Matt Kraaiab8f9e22000-11-18 01:28:57 +0000611 if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
612 errorFlag = TRUE;
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000613 continue;
614 }
615
Erik Andersen0817d132000-04-09 15:17:40 +0000616#if defined BB_FEATURE_TAR_EXCLUDE
Matt Kraaibe7499c2001-01-03 17:22:10 +0000617 if (exclude_file(excludeList, header.name)) {
Erik Andersen0817d132000-04-09 15:17:40 +0000618 /* There are not the droids you're looking for, move along */
Matt Kraaibe7499c2001-01-03 17:22:10 +0000619 /* If it is a regular file, pretend to extract it with
620 * the extractFlag set to FALSE, so the junk in the tarball
621 * is properly skipped over */
622 if ( header.type==REGTYPE || header.type==REGTYPE0 ) {
623 if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
624 errorFlag = TRUE;
625 }
626 continue;
Erik Andersen0817d132000-04-09 15:17:40 +0000627 }
628#endif
Matt Kraaibe7499c2001-01-03 17:22:10 +0000629
Matt Kraai8f8dab92001-01-22 05:25:19 +0000630 if (!extract_file(extractList, header.name)) {
Matt Kraaib92223b2000-09-04 08:25:42 +0000631 /* There are not the droids you're looking for, move along */
Matt Kraai8f8dab92001-01-22 05:25:19 +0000632 /* If it is a regular file, pretend to extract it with
633 * the extractFlag set to FALSE, so the junk in the tarball
634 * is properly skipped over */
635 if ( header.type==REGTYPE || header.type==REGTYPE0 ) {
636 if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
637 errorFlag = TRUE;
Matt Kraaib92223b2000-09-04 08:25:42 +0000638 }
Matt Kraai8f8dab92001-01-22 05:25:19 +0000639 continue;
Matt Kraaib92223b2000-09-04 08:25:42 +0000640 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000641
Matt Kraai82cfbad2000-09-15 21:18:43 +0000642 if (listFlag == TRUE) {
Matt Kraai6fc2a7d2000-09-15 22:23:41 +0000643 /* Special treatment if the list (-t) flag is on */
644 if (verboseFlag == TRUE) {
645 int len, len1;
646 char buf[35];
647 struct tm *tm = localtime (&(header.mtime));
648
Mark Whitleyf57c9442000-12-07 19:56:48 +0000649 len=printf("%s ", mode_string(header.mode));
Matt Kraai6fc2a7d2000-09-15 22:23:41 +0000650 my_getpwuid(buf, header.uid);
651 if (! *buf)
652 len+=printf("%d", header.uid);
653 else
654 len+=printf("%s", buf);
Matt Kraai6fc2a7d2000-09-15 22:23:41 +0000655 my_getgrgid(buf, header.gid);
656 if (! *buf)
657 len+=printf("/%-d ", header.gid);
658 else
659 len+=printf("/%-s ", buf);
660
661 if (header.type==CHRTYPE || header.type==BLKTYPE) {
662 len1=snprintf(buf, sizeof(buf), "%ld,%-ld ",
663 header.devmajor, header.devminor);
664 } else {
665 len1=snprintf(buf, sizeof(buf), "%lu ", (long)header.size);
666 }
667 /* Jump through some hoops to make the columns match up */
668 for(;(len+len1)<31;len++)
669 printf(" ");
670 printf(buf);
671
672 /* Use ISO 8610 time format */
673 if (tm) {
674 printf ("%04d-%02d-%02d %02d:%02d:%02d ",
675 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
676 tm->tm_hour, tm->tm_min, tm->tm_sec);
677 }
678 }
Eric Andersenfdd51032000-08-02 18:48:26 +0000679 printf("%s", header.name);
Matt Kraai82cfbad2000-09-15 21:18:43 +0000680 if (verboseFlag == TRUE) {
681 if (header.type==LNKTYPE) /* If this is a link, say so */
682 printf(" link to %s", header.linkname);
683 else if (header.type==SYMTYPE)
684 printf(" -> %s", header.linkname);
685 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000686 printf("\n");
687 }
688
Matt Kraai6fc2a7d2000-09-15 22:23:41 +0000689 /* List contents if we are supposed to do that */
690 if (verboseFlag == TRUE && extractFlag == TRUE) {
691 /* Now the normal listing */
692 FILE *vbFd = stdout;
693 if (tostdoutFlag == TRUE) // If the archive goes to stdout, verbose to stderr
694 vbFd = stderr;
695 fprintf(vbFd, "%s\n", header.name);
696 }
697
Matt Kraaif4462972000-09-01 02:50:48 +0000698 /* Remove files if we would overwrite them */
Matt Kraaida542f32000-09-01 02:53:01 +0000699 if (extractFlag == TRUE && tostdoutFlag == FALSE)
Matt Kraaif4462972000-09-01 02:50:48 +0000700 unlink(header.name);
Eric Andersencc8ed391999-10-05 16:24:54 +0000701
Erik Andersen1ad302a2000-03-24 00:54:46 +0000702 /* If we got here, we can be certain we have a legitimate
703 * header to work with. So work with it. */
704 switch ( header.type ) {
705 case REGTYPE:
706 case REGTYPE0:
707 /* If the name ends in a '/' then assume it is
708 * supposed to be a directory, and fall through */
Glenn L McGrathaf166e72001-04-29 00:50:33 +0000709 if (!last_char_is(header.name,'/')) {
Erik Andersen6a34b532000-04-07 06:55:38 +0000710 if (tarExtractRegularFile(&header, extractFlag, tostdoutFlag)==FALSE)
711 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000712 break;
713 }
714 case DIRTYPE:
Erik Andersen6a34b532000-04-07 06:55:38 +0000715 if (tarExtractDirectory( &header, extractFlag, tostdoutFlag)==FALSE)
716 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000717 break;
718 case LNKTYPE:
Erik Andersen6a34b532000-04-07 06:55:38 +0000719 if (tarExtractHardLink( &header, extractFlag, tostdoutFlag)==FALSE)
720 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000721 break;
722 case SYMTYPE:
Erik Andersen6a34b532000-04-07 06:55:38 +0000723 if (tarExtractSymLink( &header, extractFlag, tostdoutFlag)==FALSE)
724 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000725 break;
726 case CHRTYPE:
727 case BLKTYPE:
728 case FIFOTYPE:
Erik Andersen6a34b532000-04-07 06:55:38 +0000729 if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE)
730 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000731 break;
Eric Andersen1b1cfde2000-09-24 00:54:37 +0000732#if 0
733 /* Handled earlier */
734 case GNULONGNAME:
735 case GNULONGLINK:
736 skipNextHeaderFlag=TRUE;
737 break;
738#endif
Erik Andersen1ad302a2000-03-24 00:54:46 +0000739 default:
Matt Kraaidd19c692001-01-31 19:00:21 +0000740 error_msg("Unknown file type '%c' in tar file", header.type);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000741 close( tarFd);
742 return( FALSE);
743 }
744 }
745 close(tarFd);
746 if (status > 0) {
747 /* Bummer - we read a partial header */
Matt Kraai1fa1ade2000-12-18 03:57:16 +0000748 perror_msg("Error reading tar file");
Erik Andersen1ad302a2000-03-24 00:54:46 +0000749 return ( FALSE);
750 }
Erik Andersen6a34b532000-04-07 06:55:38 +0000751 else if (errorFlag==TRUE) {
Matt Kraaidd19c692001-01-31 19:00:21 +0000752 error_msg( "Error exit delayed from previous errors");
Erik Andersen6a34b532000-04-07 06:55:38 +0000753 return( FALSE);
754 } else
Erik Andersen1ad302a2000-03-24 00:54:46 +0000755 return( status);
756
757 /* Stuff to do when we are done */
758endgame:
759 close( tarFd);
760 if ( *(header.name) == '\0' ) {
Erik Andersen6a34b532000-04-07 06:55:38 +0000761 if (errorFlag==TRUE)
Matt Kraaidd19c692001-01-31 19:00:21 +0000762 error_msg( "Error exit delayed from previous errors");
Erik Andersen6a34b532000-04-07 06:55:38 +0000763 else
Erik Andersen1ad302a2000-03-24 00:54:46 +0000764 return( TRUE);
765 }
766 return( FALSE);
767}
768
Erik Andersen6acaa402000-03-26 14:03:20 +0000769
770#ifdef BB_FEATURE_TAR_CREATE
771
Eric Andersen3d957c82000-12-07 00:34:58 +0000772/*
773** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
774** the only functions that deal with the HardLinkInfo structure.
775** Even these functions use the xxxHardLinkInfo() functions.
776*/
777typedef struct HardLinkInfo HardLinkInfo;
778struct HardLinkInfo
779{
780 HardLinkInfo *next; /* Next entry in list */
781 dev_t dev; /* Device number */
782 ino_t ino; /* Inode number */
783 short linkCount; /* (Hard) Link Count */
784 char name[1]; /* Start of filename (must be last) */
785};
786
Erik Andersen68a9ea42000-04-04 18:39:50 +0000787/* Some info to be carried along when creating a new tarball */
788struct TarBallInfo
789{
790 char* fileName; /* File name of the tarball */
791 int tarFd; /* Open-for-write file descriptor
792 for the tarball */
793 struct stat statBuf; /* Stat info for the tarball, letting
794 us know the inode and device that the
795 tarball lives, so we can avoid trying
796 to include the tarball into itself */
797 int verboseFlag; /* Whether to print extra stuff or not */
Erik Andersenecd51242000-04-08 03:08:21 +0000798 char** excludeList; /* List of files to not include */
Eric Andersen3d957c82000-12-07 00:34:58 +0000799 HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
800 HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
Erik Andersen68a9ea42000-04-04 18:39:50 +0000801};
802typedef struct TarBallInfo TarBallInfo;
803
804
Eric Andersen3d957c82000-12-07 00:34:58 +0000805/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
806static void
807addHardLinkInfo (HardLinkInfo **hlInfoHeadPtr, dev_t dev, ino_t ino,
808 short linkCount, const char *name)
809{
810 /* Note: hlInfoHeadPtr can never be NULL! */
811 HardLinkInfo *hlInfo;
812
813 hlInfo = (HardLinkInfo *)xmalloc(sizeof(HardLinkInfo)+strlen(name)+1);
814 if (hlInfo) {
815 hlInfo->next = *hlInfoHeadPtr;
816 *hlInfoHeadPtr = hlInfo;
817 hlInfo->dev = dev;
818 hlInfo->ino = ino;
819 hlInfo->linkCount = linkCount;
820 strcpy(hlInfo->name, name);
821 }
822 return;
823}
824
825static void
826freeHardLinkInfo (HardLinkInfo **hlInfoHeadPtr)
827{
828 HardLinkInfo *hlInfo = NULL;
829 HardLinkInfo *hlInfoNext = NULL;
830
831 if (hlInfoHeadPtr) {
832 hlInfo = *hlInfoHeadPtr;
833 while (hlInfo) {
834 hlInfoNext = hlInfo->next;
835 free(hlInfo);
836 hlInfo = hlInfoNext;
837 }
838 *hlInfoHeadPtr = NULL;
839 }
840 return;
841}
842
843/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
844static HardLinkInfo *
845findHardLinkInfo (HardLinkInfo *hlInfo, dev_t dev, ino_t ino)
846{
847 while(hlInfo) {
848 if ((ino == hlInfo->ino) && (dev == hlInfo->dev))
849 break;
850 hlInfo = hlInfo->next;
851 }
852 return(hlInfo);
853}
854
Erik Andersen6acaa402000-03-26 14:03:20 +0000855/* Put an octal string into the specified buffer.
856 * The number is zero and space padded and possibly null padded.
857 * Returns TRUE if successful. */
858static int putOctal (char *cp, int len, long value)
859{
860 int tempLength;
Erik Andersen6acaa402000-03-26 14:03:20 +0000861 char tempBuffer[32];
Erik Andersen5661fe02000-04-05 01:00:52 +0000862 char *tempString = tempBuffer;
Erik Andersen6acaa402000-03-26 14:03:20 +0000863
864 /* Create a string of the specified length with an initial space,
865 * leading zeroes and the octal number, and a trailing null. */
Erik Andersen5661fe02000-04-05 01:00:52 +0000866 sprintf (tempString, "%0*lo", len - 1, value);
Erik Andersen6acaa402000-03-26 14:03:20 +0000867
868 /* If the string is too large, suppress the leading space. */
Erik Andersen5661fe02000-04-05 01:00:52 +0000869 tempLength = strlen (tempString) + 1;
Erik Andersen6acaa402000-03-26 14:03:20 +0000870 if (tempLength > len) {
871 tempLength--;
872 tempString++;
873 }
874
875 /* If the string is still too large, suppress the trailing null. */
876 if (tempLength > len)
877 tempLength--;
878
879 /* If the string is still too large, fail. */
880 if (tempLength > len)
881 return FALSE;
882
883 /* Copy the string to the field. */
884 memcpy (cp, tempString, len);
885
886 return TRUE;
887}
888
Erik Andersen68a9ea42000-04-04 18:39:50 +0000889/* Write out a tar header for the specified file/directory/whatever */
Erik Andersen3364d782000-03-28 00:58:14 +0000890static int
Matt Kraaie80a2632000-12-19 20:45:49 +0000891writeTarHeader(struct TarBallInfo *tbInfo, const char *header_name,
892 const char *real_name, struct stat *statbuf)
Erik Andersen6acaa402000-03-26 14:03:20 +0000893{
Erik Andersen5661fe02000-04-05 01:00:52 +0000894 long chksum=0;
895 struct TarHeader header;
896 const unsigned char *cp = (const unsigned char *) &header;
897 ssize_t size = sizeof(struct TarHeader);
Eric Andersenfdd51032000-08-02 18:48:26 +0000898
Erik Andersen5661fe02000-04-05 01:00:52 +0000899 memset( &header, 0, size);
Erik Andersen3364d782000-03-28 00:58:14 +0000900
Matt Kraaie80a2632000-12-19 20:45:49 +0000901 strncpy(header.name, header_name, sizeof(header.name));
Erik Andersenecd51242000-04-08 03:08:21 +0000902
Erik Andersen5661fe02000-04-05 01:00:52 +0000903 putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
904 putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
905 putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
906 putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
907 putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
908 strncpy(header.magic, TAR_MAGIC TAR_VERSION,
909 TAR_MAGIC_LEN + TAR_VERSION_LEN );
Erik Andersen68a9ea42000-04-04 18:39:50 +0000910
Erik Andersen84e09e42000-04-08 20:58:35 +0000911 /* Enter the user and group names (default to root if it fails) */
Erik Andersen5661fe02000-04-05 01:00:52 +0000912 my_getpwuid(header.uname, statbuf->st_uid);
Erik Andersen5661fe02000-04-05 01:00:52 +0000913 if (! *header.uname)
Erik Andersen84e09e42000-04-08 20:58:35 +0000914 strcpy(header.uname, "root");
Erik Andersen5661fe02000-04-05 01:00:52 +0000915 my_getgrgid(header.gname, statbuf->st_gid);
916 if (! *header.uname)
Erik Andersen84e09e42000-04-08 20:58:35 +0000917 strcpy(header.uname, "root");
Erik Andersen5661fe02000-04-05 01:00:52 +0000918
Eric Andersen3d957c82000-12-07 00:34:58 +0000919 if (tbInfo->hlInfo) {
920 /* This is a hard link */
921 header.typeflag = LNKTYPE;
922 strncpy(header.linkname, tbInfo->hlInfo->name, sizeof(header.linkname));
923 } else if (S_ISLNK(statbuf->st_mode)) {
Mark Whitley8a633262001-04-30 18:17:00 +0000924 char *lpath = xreadlink(real_name);
Erik Andersen5661fe02000-04-05 01:00:52 +0000925 header.typeflag = SYMTYPE;
Mark Whitley8a633262001-04-30 18:17:00 +0000926 strncpy(header.linkname, lpath, sizeof(header.linkname));
927 free(lpath);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000928 } else if (S_ISDIR(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000929 header.typeflag = DIRTYPE;
930 strncat(header.name, "/", sizeof(header.name));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000931 } else if (S_ISCHR(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000932 header.typeflag = CHRTYPE;
933 putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
934 putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000935 } else if (S_ISBLK(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000936 header.typeflag = BLKTYPE;
937 putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
938 putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000939 } else if (S_ISFIFO(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000940 header.typeflag = FIFOTYPE;
941 } else if (S_ISREG(statbuf->st_mode)) {
942 header.typeflag = REGTYPE;
943 putOctal(header.size, sizeof(header.size), statbuf->st_size);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000944 } else {
Matt Kraaidd19c692001-01-31 19:00:21 +0000945 error_msg("%s: Unknown file type", real_name);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000946 return ( FALSE);
947 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000948
Erik Andersen5661fe02000-04-05 01:00:52 +0000949 /* Calculate and store the checksum (i.e. the sum of all of the bytes of
950 * the header). The checksum field must be filled with blanks for the
951 * calculation. The checksum field is formatted differently from the
952 * other fields: it has [6] digits, a null, then a space -- rather than
953 * digits, followed by a null like the other fields... */
954 memset(header.chksum, ' ', sizeof(header.chksum));
955 cp = (const unsigned char *) &header;
956 while (size-- > 0)
957 chksum += *cp++;
958 putOctal(header.chksum, 7, chksum);
959
960 /* Now write the header out to disk */
Mark Whitleyf57c9442000-12-07 19:56:48 +0000961 if ((size=full_write(tbInfo->tarFd, (char*)&header, sizeof(struct TarHeader))) < 0) {
Matt Kraaie80a2632000-12-19 20:45:49 +0000962 error_msg(io_error, real_name, strerror(errno));
Erik Andersen5661fe02000-04-05 01:00:52 +0000963 return ( FALSE);
964 }
965 /* Pad the header up to the tar block size */
966 for (; size<TAR_BLOCK_SIZE; size++) {
967 write(tbInfo->tarFd, "\0", 1);
968 }
969 /* Now do the verbose thing (or not) */
Eric Andersenfdd51032000-08-02 18:48:26 +0000970 if (tbInfo->verboseFlag==TRUE) {
971 FILE *vbFd = stdout;
972 if (tbInfo->tarFd == fileno(stdout)) // If the archive goes to stdout, verbose to stderr
973 vbFd = stderr;
974 fprintf(vbFd, "%s\n", header.name);
975 }
Erik Andersen3364d782000-03-28 00:58:14 +0000976
977 return ( TRUE);
978}
979
980
Erik Andersen68a9ea42000-04-04 18:39:50 +0000981static int writeFileToTarball(const char *fileName, struct stat *statbuf, void* userData)
Erik Andersen3364d782000-03-28 00:58:14 +0000982{
Erik Andersen68a9ea42000-04-04 18:39:50 +0000983 struct TarBallInfo *tbInfo = (struct TarBallInfo *)userData;
Matt Kraaie80a2632000-12-19 20:45:49 +0000984 const char *header_name;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000985
Eric Andersen3d957c82000-12-07 00:34:58 +0000986 /*
987 ** Check to see if we are dealing with a hard link.
988 ** If so -
989 ** Treat the first occurance of a given dev/inode as a file while
990 ** treating any additional occurances as hard links. This is done
991 ** by adding the file information to the HardLinkInfo linked list.
992 */
993 tbInfo->hlInfo = NULL;
994 if (statbuf->st_nlink > 1) {
995 tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf->st_dev,
996 statbuf->st_ino);
997 if (tbInfo->hlInfo == NULL)
998 addHardLinkInfo (&tbInfo->hlInfoHead, statbuf->st_dev,
999 statbuf->st_ino, statbuf->st_nlink, fileName);
1000 }
1001
Erik Andersen68a9ea42000-04-04 18:39:50 +00001002 /* It is against the rules to archive a socket */
1003 if (S_ISSOCK(statbuf->st_mode)) {
Matt Kraaidd19c692001-01-31 19:00:21 +00001004 error_msg("%s: socket ignored", fileName);
Erik Andersen68a9ea42000-04-04 18:39:50 +00001005 return( TRUE);
1006 }
1007
1008 /* It is a bad idea to store the archive we are in the process of creating,
1009 * so check the device and inode to be sure that this particular file isn't
1010 * the new tarball */
1011 if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
1012 tbInfo->statBuf.st_ino == statbuf->st_ino) {
Matt Kraaidd19c692001-01-31 19:00:21 +00001013 error_msg("%s: file is the archive; skipping", fileName);
Erik Andersen68a9ea42000-04-04 18:39:50 +00001014 return( TRUE);
1015 }
1016
Matt Kraaie80a2632000-12-19 20:45:49 +00001017 header_name = fileName;
1018 while (header_name[0] == '/') {
Matt Kraaia1f97752000-12-19 06:24:08 +00001019 static int alreadyWarned=FALSE;
1020 if (alreadyWarned==FALSE) {
Matt Kraaidd19c692001-01-31 19:00:21 +00001021 error_msg("Removing leading '/' from member names");
Matt Kraaia1f97752000-12-19 06:24:08 +00001022 alreadyWarned=TRUE;
1023 }
Matt Kraaie80a2632000-12-19 20:45:49 +00001024 header_name++;
Matt Kraaia1f97752000-12-19 06:24:08 +00001025 }
1026
Eric Andersen1b1cfde2000-09-24 00:54:37 +00001027 if (strlen(fileName) >= NAME_SIZE) {
Mark Whitleyf57c9442000-12-07 19:56:48 +00001028 error_msg(name_longer_than_foo, NAME_SIZE);
Eric Andersen1b1cfde2000-09-24 00:54:37 +00001029 return ( TRUE);
1030 }
1031
Matt Kraaie80a2632000-12-19 20:45:49 +00001032 if (header_name[0] == '\0')
Matt Kraaia1f97752000-12-19 06:24:08 +00001033 return TRUE;
1034
1035#if defined BB_FEATURE_TAR_EXCLUDE
Matt Kraaibe7499c2001-01-03 17:22:10 +00001036 if (exclude_file(tbInfo->excludeList, header_name)) {
1037 return SKIP;
Matt Kraaia1f97752000-12-19 06:24:08 +00001038 }
1039#endif
1040
Matt Kraaie80a2632000-12-19 20:45:49 +00001041 if (writeTarHeader(tbInfo, header_name, fileName, statbuf)==FALSE) {
Erik Andersen5661fe02000-04-05 01:00:52 +00001042 return( FALSE);
Erik Andersen68a9ea42000-04-04 18:39:50 +00001043 }
Erik Andersen5661fe02000-04-05 01:00:52 +00001044
1045 /* Now, if the file is a regular file, copy it out to the tarball */
Eric Andersen3d957c82000-12-07 00:34:58 +00001046 if ((tbInfo->hlInfo == NULL)
1047 && (S_ISREG(statbuf->st_mode))) {
Erik Andersen5661fe02000-04-05 01:00:52 +00001048 int inputFileFd;
1049 char buffer[BUFSIZ];
1050 ssize_t size=0, readSize=0;
1051
1052 /* open the file we want to archive, and make sure all is well */
1053 if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
Matt Kraaidd19c692001-01-31 19:00:21 +00001054 error_msg("%s: Cannot open: %s", fileName, strerror(errno));
Erik Andersen5661fe02000-04-05 01:00:52 +00001055 return( FALSE);
1056 }
1057
1058 /* write the file to the archive */
Mark Whitleyf57c9442000-12-07 19:56:48 +00001059 while ( (size = full_read(inputFileFd, buffer, sizeof(buffer))) > 0 ) {
1060 if (full_write(tbInfo->tarFd, buffer, size) != size ) {
Erik Andersen5661fe02000-04-05 01:00:52 +00001061 /* Output file seems to have a problem */
Mark Whitleyf57c9442000-12-07 19:56:48 +00001062 error_msg(io_error, fileName, strerror(errno));
Erik Andersen5661fe02000-04-05 01:00:52 +00001063 return( FALSE);
1064 }
1065 readSize+=size;
1066 }
1067 if (size == -1) {
Mark Whitleyf57c9442000-12-07 19:56:48 +00001068 error_msg(io_error, fileName, strerror(errno));
Erik Andersen5661fe02000-04-05 01:00:52 +00001069 return( FALSE);
1070 }
1071 /* Pad the file up to the tar block size */
1072 for (; (readSize%TAR_BLOCK_SIZE) != 0; readSize++) {
1073 write(tbInfo->tarFd, "\0", 1);
1074 }
1075 close( inputFileFd);
1076 }
Erik Andersen68a9ea42000-04-04 18:39:50 +00001077
1078 return( TRUE);
Erik Andersen6acaa402000-03-26 14:03:20 +00001079}
1080
Matt Kraaid8ad76c2000-11-08 02:35:47 +00001081static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
1082 char** excludeList)
Erik Andersen6acaa402000-03-26 14:03:20 +00001083{
Erik Andersen3364d782000-03-28 00:58:14 +00001084 int tarFd=-1;
Erik Andersen68a9ea42000-04-04 18:39:50 +00001085 int errorFlag=FALSE;
Erik Andersen5661fe02000-04-05 01:00:52 +00001086 ssize_t size;
Erik Andersen68a9ea42000-04-04 18:39:50 +00001087 struct TarBallInfo tbInfo;
1088 tbInfo.verboseFlag = verboseFlag;
Eric Andersen3d957c82000-12-07 00:34:58 +00001089 tbInfo.hlInfoHead = NULL;
Erik Andersen3364d782000-03-28 00:58:14 +00001090
1091 /* Make sure there is at least one file to tar up. */
Matt Kraaid8ad76c2000-11-08 02:35:47 +00001092 if (*argv == NULL)
Matt Kraaidd19c692001-01-31 19:00:21 +00001093 error_msg_and_die("Cowardly refusing to create an empty archive");
Erik Andersen6acaa402000-03-26 14:03:20 +00001094
1095 /* Open the tar file for writing. */
Matt Kraaid8ad76c2000-11-08 02:35:47 +00001096 if (!strcmp(tarName, "-"))
Erik Andersen68a9ea42000-04-04 18:39:50 +00001097 tbInfo.tarFd = fileno(stdout);
Erik Andersen6acaa402000-03-26 14:03:20 +00001098 else
Erik Andersen68a9ea42000-04-04 18:39:50 +00001099 tbInfo.tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1100 if (tbInfo.tarFd < 0) {
Matt Kraai1fa1ade2000-12-18 03:57:16 +00001101 perror_msg( "Error opening '%s'", tarName);
Eric Andersen3d957c82000-12-07 00:34:58 +00001102 freeHardLinkInfo(&tbInfo.hlInfoHead);
Erik Andersen6acaa402000-03-26 14:03:20 +00001103 return ( FALSE);
1104 }
Erik Andersenecd51242000-04-08 03:08:21 +00001105 tbInfo.excludeList=excludeList;
Erik Andersen68a9ea42000-04-04 18:39:50 +00001106 /* Store the stat info for the tarball's file, so
1107 * can avoid including the tarball into itself.... */
1108 if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
Mark Whitleyf57c9442000-12-07 19:56:48 +00001109 error_msg_and_die(io_error, tarName, strerror(errno));
Erik Andersen6acaa402000-03-26 14:03:20 +00001110
1111 /* Set the umask for this process so it doesn't
1112 * screw up permission setting for us later. */
1113 umask(0);
1114
1115 /* Read the directory/files and iterate over them one at a time */
Matt Kraaid8ad76c2000-11-08 02:35:47 +00001116 while (*argv != NULL) {
Mark Whitleyf57c9442000-12-07 19:56:48 +00001117 if (recursive_action(*argv++, TRUE, FALSE, FALSE,
Erik Andersen68a9ea42000-04-04 18:39:50 +00001118 writeFileToTarball, writeFileToTarball,
1119 (void*) &tbInfo) == FALSE) {
1120 errorFlag = TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +00001121 }
Erik Andersen6acaa402000-03-26 14:03:20 +00001122 }
Erik Andersen5661fe02000-04-05 01:00:52 +00001123 /* Write two empty blocks to the end of the archive */
1124 for (size=0; size<(2*TAR_BLOCK_SIZE); size++) {
1125 write(tbInfo.tarFd, "\0", 1);
1126 }
Erik Andersen0817d132000-04-09 15:17:40 +00001127
1128 /* To be pedantically correct, we would check if the tarball
Eric Andersen3c5ee9a2000-11-14 22:15:48 +00001129 * is smaller than 20 tar blocks, and pad it if it was smaller,
Erik Andersen0817d132000-04-09 15:17:40 +00001130 * but that isn't necessary for GNU tar interoperability, and
1131 * so is considered a waste of space */
1132
Erik Andersen68a9ea42000-04-04 18:39:50 +00001133 /* Hang up the tools, close up shop, head home */
Erik Andersen6acaa402000-03-26 14:03:20 +00001134 close(tarFd);
Erik Andersen68a9ea42000-04-04 18:39:50 +00001135 if (errorFlag == TRUE) {
Matt Kraaidd19c692001-01-31 19:00:21 +00001136 error_msg("Error exit delayed from previous errors");
Eric Andersen3d957c82000-12-07 00:34:58 +00001137 freeHardLinkInfo(&tbInfo.hlInfoHead);
Erik Andersen68a9ea42000-04-04 18:39:50 +00001138 return(FALSE);
1139 }
Eric Andersen3d957c82000-12-07 00:34:58 +00001140 freeHardLinkInfo(&tbInfo.hlInfoHead);
Erik Andersen6acaa402000-03-26 14:03:20 +00001141 return( TRUE);
1142}
1143
1144
1145#endif
1146