blob: 6f18dc43f3cef240e3c0596f8802899b9962cbff [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 *
Erik Andersen68a9ea42000-04-04 18:39:50 +00009 * Copyright (C) 2000 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
39#include "internal.h"
Erik Andersen1ad302a2000-03-24 00:54:46 +000040#define BB_DECLARE_EXTERN
41#define bb_need_io_error
42#include "messages.c"
Eric Andersencc8ed391999-10-05 16:24:54 +000043#include <stdio.h>
44#include <dirent.h>
45#include <errno.h>
46#include <fcntl.h>
47#include <signal.h>
48#include <time.h>
Erik Andersen7dc16072000-01-04 01:10:25 +000049#include <utime.h>
Eric Andersen96bcfd31999-11-12 01:30:18 +000050#include <sys/types.h>
Eric Andersen08b10341999-11-19 02:38:58 +000051#include <sys/sysmacros.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000052
Erik Andersen298854f2000-03-23 01:09:18 +000053/* Tar file constants */
Erik Andersen1ad302a2000-03-24 00:54:46 +000054#ifndef MAJOR
55#define MAJOR(dev) (((dev)>>8)&0xff)
56#define MINOR(dev) ((dev)&0xff)
57#endif
Eric Andersencc8ed391999-10-05 16:24:54 +000058
59
Erik Andersen298854f2000-03-23 01:09:18 +000060/* POSIX tar Header Block, from POSIX 1003.1-1990 */
61struct TarHeader
62{
63 /* byte offset */
Erik Andersen0817d132000-04-09 15:17:40 +000064 char name[100]; /* 0-99 */
65 char mode[8]; /* 100-107 */
66 char uid[8]; /* 108-115 */
67 char gid[8]; /* 116-123 */
68 char size[12]; /* 124-135 */
69 char mtime[12]; /* 136-147 */
70 char chksum[8]; /* 148-155 */
71 char typeflag; /* 156-156 */
72 char linkname[100]; /* 157-256 */
73 char magic[6]; /* 257-262 */
74 char version[2]; /* 263-264 */
75 char uname[32]; /* 265-296 */
76 char gname[32]; /* 297-328 */
77 char devmajor[8]; /* 329-336 */
78 char devminor[8]; /* 337-344 */
79 char prefix[155]; /* 345-499 */
80 char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
Erik Andersen298854f2000-03-23 01:09:18 +000081};
82typedef struct TarHeader TarHeader;
Eric Andersencc8ed391999-10-05 16:24:54 +000083
Eric Andersencc8ed391999-10-05 16:24:54 +000084
Erik Andersen298854f2000-03-23 01:09:18 +000085/* A few useful constants */
86#define TAR_MAGIC "ustar" /* ustar and a null */
Erik Andersen0817d132000-04-09 15:17:40 +000087#define TAR_VERSION " " /* Be compatable with GNU tar format */
Erik Andersen298854f2000-03-23 01:09:18 +000088#define TAR_MAGIC_LEN 6
89#define TAR_VERSION_LEN 2
Erik Andersen298854f2000-03-23 01:09:18 +000090#define TAR_BLOCK_SIZE 512
91
92/* A nice enum with all the possible tar file content types */
93enum TarFileType
94{
95 REGTYPE = '0', /* regular file */
96 REGTYPE0 = '\0', /* regular file (ancient bug compat)*/
97 LNKTYPE = '1', /* hard link */
98 SYMTYPE = '2', /* symbolic link */
99 CHRTYPE = '3', /* character special */
100 BLKTYPE = '4', /* block special */
101 DIRTYPE = '5', /* directory */
102 FIFOTYPE = '6', /* FIFO special */
103 CONTTYPE = '7', /* reserved */
104};
105typedef enum TarFileType TarFileType;
106
107/* This struct ignores magic, non-numeric user name,
108 * non-numeric group name, and the checksum, since
109 * these are all ignored by BusyBox tar. */
110struct TarInfo
111{
112 int tarFd; /* An open file descriptor for reading from the tarball */
113 char * name; /* File name */
114 mode_t mode; /* Unix mode, including device bits. */
115 uid_t uid; /* Numeric UID */
116 gid_t gid; /* Numeric GID */
117 size_t size; /* Size of file */
118 time_t mtime; /* Last-modified time */
119 enum TarFileType type; /* Regular, directory, link, etc */
120 char * linkname; /* Name for symbolic and hard links */
Erik Andersen1ad302a2000-03-24 00:54:46 +0000121 long devmajor; /* Major number for special device */
122 long devminor; /* Minor number for special device */
Erik Andersen298854f2000-03-23 01:09:18 +0000123};
124typedef struct TarInfo TarInfo;
125
Erik Andersene454fb62000-03-23 04:27:58 +0000126/* Local procedures to restore files from a tar file. */
Erik Andersen298854f2000-03-23 01:09:18 +0000127static int readTarFile(const char* tarName, int extractFlag, int listFlag,
Erik Andersenecd51242000-04-08 03:08:21 +0000128 int tostdoutFlag, int verboseFlag, char** excludeList);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000129
130
Eric Andersencc8ed391999-10-05 16:24:54 +0000131
Erik Andersen05100cd2000-01-16 01:30:52 +0000132#ifdef BB_FEATURE_TAR_CREATE
Erik Andersen6acaa402000-03-26 14:03:20 +0000133/* Local procedures to save files into a tar file. */
Erik Andersen68a9ea42000-04-04 18:39:50 +0000134static int writeTarFile(const char* tarName, int tostdoutFlag,
Erik Andersenecd51242000-04-08 03:08:21 +0000135 int verboseFlag, int argc, char **argv, char** excludeList);
Erik Andersen05100cd2000-01-16 01:30:52 +0000136#endif
137
Eric Andersencc8ed391999-10-05 16:24:54 +0000138
Erik Andersene49d5ec2000-02-08 19:58:47 +0000139extern int tar_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +0000140{
Erik Andersenecd51242000-04-08 03:08:21 +0000141 char** excludeList=NULL;
Erik Andersen0817d132000-04-09 15:17:40 +0000142#if defined BB_FEATURE_TAR_EXCLUDE
Erik Andersenecd51242000-04-08 03:08:21 +0000143 int excludeListSize=0;
Erik Andersen0817d132000-04-09 15:17:40 +0000144#endif
Eric Andersen108a4432000-05-30 19:05:57 +0000145 const char *tarName="-";
Erik Andersen298854f2000-03-23 01:09:18 +0000146 int listFlag = FALSE;
147 int extractFlag = FALSE;
148 int createFlag = FALSE;
149 int verboseFlag = FALSE;
150 int tostdoutFlag = FALSE;
Erik Andersenecd51242000-04-08 03:08:21 +0000151 int stopIt;
Eric Andersencc8ed391999-10-05 16:24:54 +0000152
Erik Andersenecd51242000-04-08 03:08:21 +0000153 if (argc <= 1)
Erik Andersene49d5ec2000-02-08 19:58:47 +0000154 usage(tar_usage);
Eric Andersencc8ed391999-10-05 16:24:54 +0000155
Erik Andersenecd51242000-04-08 03:08:21 +0000156 /* Parse any options */
Erik Andersen8ea7d8c2000-05-20 00:40:08 +0000157 while (--argc > 0 && strspn(*(++argv), "-cxt") >0 ) {
Erik Andersenecd51242000-04-08 03:08:21 +0000158 stopIt=FALSE;
Eric Andersen108a4432000-05-30 19:05:57 +0000159 while (stopIt==FALSE && *argv && **argv) {
Erik Andersenecd51242000-04-08 03:08:21 +0000160 switch (**argv) {
161 case 'f':
162 if (--argc == 0) {
163 fatalError( "Option requires an argument: No file specified\n");
164 }
Eric Andersen108a4432000-05-30 19:05:57 +0000165 if (*tarName != '-')
Erik Andersenecd51242000-04-08 03:08:21 +0000166 fatalError( "Only one 'f' option allowed\n");
167 tarName = *(++argv);
168 if (tarName == NULL)
169 fatalError( "Option requires an argument: No file specified\n");
Eric Andersen8845adc2000-07-06 22:51:35 +0000170 if (!strcmp(tarName, "-"))
171 tostdoutFlag = TRUE;
Erik Andersenecd51242000-04-08 03:08:21 +0000172 stopIt=TRUE;
173 break;
Eric Andersencc8ed391999-10-05 16:24:54 +0000174
Erik Andersenecd51242000-04-08 03:08:21 +0000175 case 't':
176 if (extractFlag == TRUE || createFlag == TRUE)
177 goto flagError;
178 listFlag = TRUE;
179 break;
Erik Andersende552872000-01-23 01:34:05 +0000180
Erik Andersenecd51242000-04-08 03:08:21 +0000181 case 'x':
182 if (listFlag == TRUE || createFlag == TRUE)
183 goto flagError;
184 extractFlag = TRUE;
185 break;
186 case 'c':
187 if (extractFlag == TRUE || listFlag == TRUE)
188 goto flagError;
189 createFlag = TRUE;
190 break;
Erik Andersende552872000-01-23 01:34:05 +0000191
Erik Andersenecd51242000-04-08 03:08:21 +0000192 case 'v':
193 verboseFlag = TRUE;
194 break;
Erik Andersende552872000-01-23 01:34:05 +0000195
Erik Andersenecd51242000-04-08 03:08:21 +0000196 case 'O':
197 tostdoutFlag = TRUE;
198 tarName = "-";
199 break;
Erik Andersenecd51242000-04-08 03:08:21 +0000200 case '-':
Erik Andersen0817d132000-04-09 15:17:40 +0000201#if defined BB_FEATURE_TAR_EXCLUDE
202 if (strcmp(*argv, "-exclude")==0) {
203 if (--argc == 0) {
204 fatalError( "Option requires an argument: No file specified\n");
205 }
206 excludeList=realloc( excludeList, sizeof(char**) * (excludeListSize+2));
207 excludeList[excludeListSize] = *(++argv);
208 /* Remove leading "/"s */
209 if (*excludeList[excludeListSize] =='/') {
210 excludeList[excludeListSize] = (excludeList[excludeListSize])+1;
211 }
212 if (excludeList[excludeListSize++] == NULL)
213 fatalError( "Option requires an argument: No file specified\n");
214 /* Tack a NULL onto the end of the list */
215 excludeList[excludeListSize] = NULL;
216 stopIt=TRUE;
217 break;
218 }
219#endif
Eric Andersenb405dfa2000-06-21 18:37:36 +0000220 if (strcmp(*argv, "-help")==0) {
221 usage(tar_usage);
222 }
Erik Andersenecd51242000-04-08 03:08:21 +0000223 break;
Erik Andersende552872000-01-23 01:34:05 +0000224
Erik Andersenecd51242000-04-08 03:08:21 +0000225 default:
226 fatalError( "Unknown tar flag '%c'\n"
227 "Try `tar --help' for more information\n", **argv);
228 }
Eric Andersen108a4432000-05-30 19:05:57 +0000229 ++(*argv);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000230 }
Eric Andersencc8ed391999-10-05 16:24:54 +0000231 }
232
Erik Andersene49d5ec2000-02-08 19:58:47 +0000233 /*
234 * Do the correct type of action supplying the rest of the
235 * command line arguments as the list of files to process.
236 */
237 if (createFlag == TRUE) {
Erik Andersende552872000-01-23 01:34:05 +0000238#ifndef BB_FEATURE_TAR_CREATE
Erik Andersen298854f2000-03-23 01:09:18 +0000239 fatalError( "This version of tar was not compiled with tar creation support.\n");
Erik Andersende552872000-01-23 01:34:05 +0000240#else
Erik Andersenecd51242000-04-08 03:08:21 +0000241 exit(writeTarFile(tarName, tostdoutFlag, verboseFlag, argc, argv, excludeList));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000242#endif
Erik Andersen8ea7d8c2000-05-20 00:40:08 +0000243 }
244 if (listFlag == TRUE || extractFlag == TRUE) {
Erik Andersenecd51242000-04-08 03:08:21 +0000245 exit(readTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag, excludeList));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000246 }
Erik Andersende552872000-01-23 01:34:05 +0000247
Erik Andersene49d5ec2000-02-08 19:58:47 +0000248 flagError:
Erik Andersen298854f2000-03-23 01:09:18 +0000249 fatalError( "Exactly one of 'c', 'x' or 't' must be specified\n");
250}
251
252static void
Erik Andersen6a34b532000-04-07 06:55:38 +0000253fixUpPermissions(TarInfo *header)
254{
255 struct utimbuf t;
256 /* Now set permissions etc for the new file */
257 chown(header->name, header->uid, header->gid);
258 chmod(header->name, header->mode);
259 /* Reset the time */
260 t.actime = time(0);
261 t.modtime = header->mtime;
262 utime(header->name, &t);
263}
264
265static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000266tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersen298854f2000-03-23 01:09:18 +0000267{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000268 size_t writeSize;
269 size_t readSize;
270 size_t actualWriteSz;
271 char buffer[BUFSIZ];
272 size_t size = header->size;
273 int outFd=fileno(stdout);
274
275 /* Open the file to be written, if a file is supposed to be written */
276 if (extractFlag==TRUE && tostdoutFlag==FALSE) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000277 /* Create the path to the file, just in case it isn't there...
278 * This should not screw up path permissions or anything. */
279 createPath(header->name, 0777);
Eric Andersen0c6a9702000-06-09 20:51:50 +0000280 if ((outFd=open(header->name, O_CREAT|O_TRUNC|O_WRONLY,
281 header->mode & ~S_IFMT)) < 0) {
282 errorMsg(io_error, header->name, strerror(errno));
283 return( FALSE);
284 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000285 }
286
287 /* Write out the file, if we are supposed to be doing that */
288 while ( size > 0 ) {
289 actualWriteSz=0;
290 if ( size > sizeof(buffer) )
291 writeSize = readSize = sizeof(buffer);
292 else {
293 int mod = size % 512;
294 if ( mod != 0 )
295 readSize = size + (512 - mod);
296 else
297 readSize = size;
298 writeSize = size;
299 }
300 if ( (readSize = fullRead(header->tarFd, buffer, readSize)) <= 0 ) {
301 /* Tarball seems to have a problem */
Matt Kraaibe84cd42000-07-12 17:02:35 +0000302 errorMsg("Unexpected EOF in archive\n");
Erik Andersen6a34b532000-04-07 06:55:38 +0000303 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000304 }
305 if ( readSize < writeSize )
306 writeSize = readSize;
307
308 /* Write out the file, if we are supposed to be doing that */
309 if (extractFlag==TRUE) {
310
311 if ((actualWriteSz=fullWrite(outFd, buffer, writeSize)) != writeSize ) {
312 /* Output file seems to have a problem */
313 errorMsg(io_error, header->name, strerror(errno));
Erik Andersen6a34b532000-04-07 06:55:38 +0000314 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000315 }
Erik Andersen0817d132000-04-09 15:17:40 +0000316 } else {
317 actualWriteSz=writeSize;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000318 }
319
320 size -= actualWriteSz;
321 }
322
323 /* Now we are done writing the file out, so try
324 * and fix up the permissions and whatnot */
325 if (extractFlag==TRUE && tostdoutFlag==FALSE) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000326 close(outFd);
Erik Andersen6a34b532000-04-07 06:55:38 +0000327 fixUpPermissions(header);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000328 }
Erik Andersen6a34b532000-04-07 06:55:38 +0000329 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000330}
331
Erik Andersen6a34b532000-04-07 06:55:38 +0000332static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000333tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersene454fb62000-03-23 04:27:58 +0000334{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000335
336 if (extractFlag==FALSE || tostdoutFlag==TRUE)
Erik Andersen6a34b532000-04-07 06:55:38 +0000337 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000338
339 if (createPath(header->name, header->mode) != TRUE) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000340 errorMsg("%s: Cannot mkdir: %s\n",
Erik Andersen6a34b532000-04-07 06:55:38 +0000341 header->name, strerror(errno));
342 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000343 }
344 /* make the final component, just in case it was
345 * omitted by createPath() (which will skip the
346 * directory if it doesn't have a terminating '/') */
Erik Andersen6acaa402000-03-26 14:03:20 +0000347 if (mkdir(header->name, header->mode) == 0) {
348 fixUpPermissions(header);
349 }
Erik Andersen6a34b532000-04-07 06:55:38 +0000350 return( TRUE);
Erik Andersene454fb62000-03-23 04:27:58 +0000351}
352
Erik Andersen6a34b532000-04-07 06:55:38 +0000353static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000354tarExtractHardLink(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersene454fb62000-03-23 04:27:58 +0000355{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000356 if (extractFlag==FALSE || tostdoutFlag==TRUE)
Erik Andersen6a34b532000-04-07 06:55:38 +0000357 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000358
359 if (link(header->linkname, header->name) < 0) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000360 errorMsg("%s: Cannot create hard link to '%s': %s\n",
Erik Andersen5661fe02000-04-05 01:00:52 +0000361 header->name, header->linkname, strerror(errno));
Erik Andersen6a34b532000-04-07 06:55:38 +0000362 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000363 }
364
365 /* Now set permissions etc for the new directory */
366 fixUpPermissions(header);
Erik Andersen6a34b532000-04-07 06:55:38 +0000367 return( TRUE);
Erik Andersene454fb62000-03-23 04:27:58 +0000368}
369
Erik Andersen6a34b532000-04-07 06:55:38 +0000370static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000371tarExtractSymLink(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersene454fb62000-03-23 04:27:58 +0000372{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000373 if (extractFlag==FALSE || tostdoutFlag==TRUE)
Erik Andersen6a34b532000-04-07 06:55:38 +0000374 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000375
376#ifdef S_ISLNK
377 if (symlink(header->linkname, header->name) < 0) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000378 errorMsg("%s: Cannot create symlink to '%s': %s\n",
Erik Andersen5661fe02000-04-05 01:00:52 +0000379 header->name, header->linkname, strerror(errno));
Erik Andersen6a34b532000-04-07 06:55:38 +0000380 return( FALSE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000381 }
382 /* Try to change ownership of the symlink.
383 * If libs doesn't support that, don't bother.
384 * Changing the pointed-to-file is the Wrong Thing(tm).
385 */
386#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
387 lchown(header->name, header->uid, header->gid);
388#endif
389
390 /* Do not change permissions or date on symlink,
391 * since it changes the pointed to file instead. duh. */
392#else
Matt Kraaibe84cd42000-07-12 17:02:35 +0000393 errorMsg("%s: Cannot create symlink to '%s': %s\n",
Erik Andersen6a34b532000-04-07 06:55:38 +0000394 header->name, header->linkname,
395 "symlinks not supported");
Erik Andersen1ad302a2000-03-24 00:54:46 +0000396#endif
Erik Andersen6a34b532000-04-07 06:55:38 +0000397 return( TRUE);
Erik Andersene454fb62000-03-23 04:27:58 +0000398}
399
Erik Andersen6a34b532000-04-07 06:55:38 +0000400static int
Erik Andersen1ad302a2000-03-24 00:54:46 +0000401tarExtractSpecial(TarInfo *header, int extractFlag, int tostdoutFlag)
Erik Andersene454fb62000-03-23 04:27:58 +0000402{
Erik Andersen1ad302a2000-03-24 00:54:46 +0000403 if (extractFlag==FALSE || tostdoutFlag==TRUE)
Erik Andersen6a34b532000-04-07 06:55:38 +0000404 return( TRUE);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000405
406 if (S_ISCHR(header->mode) || S_ISBLK(header->mode) || S_ISSOCK(header->mode)) {
Erik Andersen6a34b532000-04-07 06:55:38 +0000407 if (mknod(header->name, header->mode, makedev(header->devmajor, header->devminor)) < 0) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000408 errorMsg("%s: Cannot mknod: %s\n",
Erik Andersen6a34b532000-04-07 06:55:38 +0000409 header->name, strerror(errno));
410 return( FALSE);
411 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000412 } else if (S_ISFIFO(header->mode)) {
Erik Andersen6a34b532000-04-07 06:55:38 +0000413 if (mkfifo(header->name, header->mode) < 0) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000414 errorMsg("%s: Cannot mkfifo: %s\n",
Erik Andersen6a34b532000-04-07 06:55:38 +0000415 header->name, strerror(errno));
416 return( FALSE);
417 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000418 }
419
420 /* Now set permissions etc for the new directory */
421 fixUpPermissions(header);
Erik Andersen6a34b532000-04-07 06:55:38 +0000422 return( TRUE);
Erik Andersene454fb62000-03-23 04:27:58 +0000423}
424
Erik Andersen1ad302a2000-03-24 00:54:46 +0000425/* Read an octal value in a field of the specified width, with optional
Erik Andersen298854f2000-03-23 01:09:18 +0000426 * spaces on both sides of the number and with an optional null character
Erik Andersen1ad302a2000-03-24 00:54:46 +0000427 * at the end. Returns -1 on an illegal format. */
Erik Andersen298854f2000-03-23 01:09:18 +0000428static long getOctal(const char *cp, int size)
Eric Andersencc8ed391999-10-05 16:24:54 +0000429{
Erik Andersen298854f2000-03-23 01:09:18 +0000430 long val = 0;
Eric Andersencc8ed391999-10-05 16:24:54 +0000431
Erik Andersen298854f2000-03-23 01:09:18 +0000432 for(;(size > 0) && (*cp == ' '); cp++, size--);
433 if ((size == 0) || !isOctal(*cp))
434 return -1;
435 for(; (size > 0) && isOctal(*cp); size--) {
436 val = val * 8 + *cp++ - '0';
Eric Andersencc8ed391999-10-05 16:24:54 +0000437 }
Erik Andersen298854f2000-03-23 01:09:18 +0000438 for (;(size > 0) && (*cp == ' '); cp++, size--);
439 if ((size > 0) && *cp)
440 return -1;
441 return val;
442}
Eric Andersencc8ed391999-10-05 16:24:54 +0000443
Erik Andersen1ad302a2000-03-24 00:54:46 +0000444
Erik Andersen298854f2000-03-23 01:09:18 +0000445/* Parse the tar header and fill in the nice struct with the details */
446static int
Erik Andersen3364d782000-03-28 00:58:14 +0000447readTarHeader(struct TarHeader *rawHeader, struct TarInfo *header)
Erik Andersen298854f2000-03-23 01:09:18 +0000448{
Erik Andersene454fb62000-03-23 04:27:58 +0000449 int i;
Erik Andersen84e09e42000-04-08 20:58:35 +0000450 long chksum, sum=0;
Erik Andersene454fb62000-03-23 04:27:58 +0000451 unsigned char *s = (unsigned char *)rawHeader;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000452
Erik Andersen298854f2000-03-23 01:09:18 +0000453 header->name = rawHeader->name;
Erik Andersen84e09e42000-04-08 20:58:35 +0000454 /* Check for and relativify any absolute paths */
455 if ( *(header->name) == '/' ) {
456 static int alreadyWarned=FALSE;
457
458 while (*(header->name) == '/')
459 ++*(header->name);
460
461 if (alreadyWarned == FALSE) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000462 errorMsg("Removing leading '/' from member names\n");
Erik Andersen84e09e42000-04-08 20:58:35 +0000463 alreadyWarned = TRUE;
464 }
465 }
466
Erik Andersen298854f2000-03-23 01:09:18 +0000467 header->mode = getOctal(rawHeader->mode, sizeof(rawHeader->mode));
468 header->uid = getOctal(rawHeader->uid, sizeof(rawHeader->uid));
469 header->gid = getOctal(rawHeader->gid, sizeof(rawHeader->gid));
470 header->size = getOctal(rawHeader->size, sizeof(rawHeader->size));
471 header->mtime = getOctal(rawHeader->mtime, sizeof(rawHeader->mtime));
472 chksum = getOctal(rawHeader->chksum, sizeof(rawHeader->chksum));
473 header->type = rawHeader->typeflag;
474 header->linkname = rawHeader->linkname;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000475 header->devmajor = getOctal(rawHeader->devmajor, sizeof(rawHeader->devmajor));
476 header->devminor = getOctal(rawHeader->devminor, sizeof(rawHeader->devminor));
Erik Andersene49d5ec2000-02-08 19:58:47 +0000477
Erik Andersen298854f2000-03-23 01:09:18 +0000478 /* Check the checksum */
Erik Andersen84e09e42000-04-08 20:58:35 +0000479 for (i = sizeof(*rawHeader); i-- != 0;) {
Erik Andersen298854f2000-03-23 01:09:18 +0000480 sum += *s++;
Erik Andersen84e09e42000-04-08 20:58:35 +0000481 }
482 /* Remove the effects of the checksum field (replace
483 * with blanks for the purposes of the checksum) */
484 s = rawHeader->chksum;
485 for (i = sizeof(rawHeader->chksum) ; i-- != 0;) {
486 sum -= *s++;
487 }
488 sum += ' ' * sizeof(rawHeader->chksum);
Erik Andersene454fb62000-03-23 04:27:58 +0000489 if (sum == chksum )
Erik Andersen298854f2000-03-23 01:09:18 +0000490 return ( TRUE);
491 return( FALSE);
492}
Erik Andersene49d5ec2000-02-08 19:58:47 +0000493
Erik Andersene49d5ec2000-02-08 19:58:47 +0000494
Erik Andersen1ad302a2000-03-24 00:54:46 +0000495/*
496 * Read a tar file and extract or list the specified files within it.
497 * If the list is empty than all files are extracted or listed.
498 */
499static int readTarFile(const char* tarName, int extractFlag, int listFlag,
Erik Andersenecd51242000-04-08 03:08:21 +0000500 int tostdoutFlag, int verboseFlag, char** excludeList)
Erik Andersen1ad302a2000-03-24 00:54:46 +0000501{
Erik Andersen0817d132000-04-09 15:17:40 +0000502 int status, tarFd=-1;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000503 int errorFlag=FALSE;
504 TarHeader rawHeader;
505 TarInfo header;
Erik Andersen0817d132000-04-09 15:17:40 +0000506#if defined BB_FEATURE_TAR_EXCLUDE
507 char** tmpList;
508#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000509
Erik Andersen1ad302a2000-03-24 00:54:46 +0000510 /* Open the tar file for reading. */
511 if (!strcmp(tarName, "-"))
512 tarFd = fileno(stdin);
513 else
514 tarFd = open(tarName, O_RDONLY);
515 if (tarFd < 0) {
Erik Andersendeea0482000-03-25 23:09:29 +0000516 errorMsg( "Error opening '%s': %s\n", tarName, strerror(errno));
Erik Andersen1ad302a2000-03-24 00:54:46 +0000517 return ( FALSE);
Erik Andersen06936df2000-01-23 02:14:20 +0000518 }
Eric Andersencc8ed391999-10-05 16:24:54 +0000519
Erik Andersene49d5ec2000-02-08 19:58:47 +0000520 /* Set the umask for this process so it doesn't
Erik Andersen1ad302a2000-03-24 00:54:46 +0000521 * screw up permission setting for us later. */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000522 umask(0);
Eric Andersencc8ed391999-10-05 16:24:54 +0000523
Erik Andersen1ad302a2000-03-24 00:54:46 +0000524 /* Read the tar file, and iterate over it one file at a time */
525 while ( (status = fullRead(tarFd, (char*)&rawHeader, TAR_BLOCK_SIZE)) == TAR_BLOCK_SIZE ) {
Erik Andersene2729152000-02-18 21:34:17 +0000526
Erik Andersen1ad302a2000-03-24 00:54:46 +0000527 /* First, try to read the header */
Erik Andersen3364d782000-03-28 00:58:14 +0000528 if ( readTarHeader(&rawHeader, &header) == FALSE ) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000529 if ( *(header.name) == '\0' ) {
530 goto endgame;
531 } else {
532 errorFlag=TRUE;
533 errorMsg("Bad tar header, skipping\n");
534 continue;
535 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000536 }
Erik Andersen1ad302a2000-03-24 00:54:46 +0000537 if ( *(header.name) == '\0' )
538 goto endgame;
Erik Andersen0817d132000-04-09 15:17:40 +0000539 header.tarFd = tarFd;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000540
Erik Andersen0817d132000-04-09 15:17:40 +0000541#if defined BB_FEATURE_TAR_EXCLUDE
542 {
543 int skipFlag=FALSE;
544 /* Check for excluded files.... */
545 for (tmpList=excludeList; tmpList && *tmpList; tmpList++) {
546 /* Do some extra hoop jumping for when directory names
547 * end in '/' but the entry in tmpList doesn't */
548 if (strncmp( *tmpList, header.name, strlen(*tmpList))==0 || (
549 header.name[strlen(header.name)-1]=='/'
550 && strncmp( *tmpList, header.name,
551 MIN(strlen(header.name)-1, strlen(*tmpList)))==0)) {
552 /* If it is a regular file, pretend to extract it with
553 * the extractFlag set to FALSE, so the junk in the tarball
554 * is properly skipped over */
555 if ( header.type==REGTYPE || header.type==REGTYPE0 ) {
556 tarExtractRegularFile(&header, FALSE, FALSE);
557 }
558 skipFlag=TRUE;
559 break;
560 }
561 }
562 /* There are not the droids you're looking for, move along */
563 if (skipFlag==TRUE)
564 continue;
565 }
566#endif
Erik Andersen1ad302a2000-03-24 00:54:46 +0000567 /* Special treatment if the list (-t) flag is on */
568 if (verboseFlag == TRUE && extractFlag == FALSE) {
569 int len, len1;
570 char buf[35];
571 struct tm *tm = localtime (&(header.mtime));
572
Erik Andersen6a34b532000-04-07 06:55:38 +0000573 len=printf("%s ", modeString(header.mode));
574 memset(buf, 0, 8*sizeof(char));
575 my_getpwuid(buf, header.uid);
576 if (! *buf)
577 len+=printf("%d", header.uid);
578 else
579 len+=printf("%s", buf);
580 memset(buf, 0, 8*sizeof(char));
581 my_getgrgid(buf, header.gid);
582 if (! *buf)
583 len+=printf("/%-d ", header.gid);
584 else
585 len+=printf("/%-s ", buf);
586
Erik Andersen1ad302a2000-03-24 00:54:46 +0000587 if (header.type==CHRTYPE || header.type==BLKTYPE) {
588 len1=snprintf(buf, sizeof(buf), "%ld,%-ld ",
589 header.devmajor, header.devminor);
590 } else {
Erik Andersen1d1d9502000-04-21 01:26:49 +0000591 len1=snprintf(buf, sizeof(buf), "%lu ", (long)header.size);
Erik Andersen1ad302a2000-03-24 00:54:46 +0000592 }
593 /* Jump through some hoops to make the columns match up */
594 for(;(len+len1)<31;len++)
595 printf(" ");
596 printf(buf);
597
598 /* Use ISO 8610 time format */
599 if (tm) {
600 printf ("%04d-%02d-%02d %02d:%02d:%02d ",
601 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
602 tm->tm_hour, tm->tm_min, tm->tm_sec);
603 }
604 }
605 /* List contents if we are supposed to do that */
606 if (verboseFlag == TRUE || listFlag == TRUE) {
607 /* Now the normal listing */
608 printf("%s", header.name);
Erik Andersen6a34b532000-04-07 06:55:38 +0000609 }
610 if (verboseFlag == TRUE && listFlag == TRUE) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000611 /* If this is a link, say so */
612 if (header.type==LNKTYPE)
613 printf(" link to %s", header.linkname);
614 else if (header.type==SYMTYPE)
615 printf(" -> %s", header.linkname);
Erik Andersen6a34b532000-04-07 06:55:38 +0000616 }
617 if (verboseFlag == TRUE || listFlag == TRUE) {
Erik Andersen1ad302a2000-03-24 00:54:46 +0000618 printf("\n");
619 }
620
Erik Andersen6a34b532000-04-07 06:55:38 +0000621 /* Remove any clutter lying in our way */
Eric Andersen1c314ad2000-06-28 16:56:25 +0000622 if (extractFlag == TRUE) /* .. but only if we are extracting (as */
623 unlink( header.name); /* opposed to listing) (rob@sysgo.de) */
Eric Andersencc8ed391999-10-05 16:24:54 +0000624
Erik Andersen1ad302a2000-03-24 00:54:46 +0000625 /* If we got here, we can be certain we have a legitimate
626 * header to work with. So work with it. */
627 switch ( header.type ) {
628 case REGTYPE:
629 case REGTYPE0:
630 /* If the name ends in a '/' then assume it is
631 * supposed to be a directory, and fall through */
632 if (header.name[strlen(header.name)-1] != '/') {
Erik Andersen6a34b532000-04-07 06:55:38 +0000633 if (tarExtractRegularFile(&header, extractFlag, tostdoutFlag)==FALSE)
634 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000635 break;
636 }
637 case DIRTYPE:
Erik Andersen6a34b532000-04-07 06:55:38 +0000638 if (tarExtractDirectory( &header, extractFlag, tostdoutFlag)==FALSE)
639 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000640 break;
641 case LNKTYPE:
Erik Andersen6a34b532000-04-07 06:55:38 +0000642 if (tarExtractHardLink( &header, extractFlag, tostdoutFlag)==FALSE)
643 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000644 break;
645 case SYMTYPE:
Erik Andersen6a34b532000-04-07 06:55:38 +0000646 if (tarExtractSymLink( &header, extractFlag, tostdoutFlag)==FALSE)
647 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000648 break;
649 case CHRTYPE:
650 case BLKTYPE:
651 case FIFOTYPE:
Erik Andersen6a34b532000-04-07 06:55:38 +0000652 if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE)
653 errorFlag=TRUE;
Erik Andersen1ad302a2000-03-24 00:54:46 +0000654 break;
655 default:
656 close( tarFd);
657 return( FALSE);
658 }
659 }
660 close(tarFd);
661 if (status > 0) {
662 /* Bummer - we read a partial header */
Erik Andersendeea0482000-03-25 23:09:29 +0000663 errorMsg( "Error reading '%s': %s\n", tarName, strerror(errno));
Erik Andersen1ad302a2000-03-24 00:54:46 +0000664 return ( FALSE);
665 }
Erik Andersen6a34b532000-04-07 06:55:38 +0000666 else if (errorFlag==TRUE) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000667 errorMsg( "Error exit delayed from previous errors\n");
Erik Andersen6a34b532000-04-07 06:55:38 +0000668 return( FALSE);
669 } else
Erik Andersen1ad302a2000-03-24 00:54:46 +0000670 return( status);
671
672 /* Stuff to do when we are done */
673endgame:
674 close( tarFd);
675 if ( *(header.name) == '\0' ) {
Erik Andersen6a34b532000-04-07 06:55:38 +0000676 if (errorFlag==TRUE)
Matt Kraaibe84cd42000-07-12 17:02:35 +0000677 errorMsg( "Error exit delayed from previous errors\n");
Erik Andersen6a34b532000-04-07 06:55:38 +0000678 else
Erik Andersen1ad302a2000-03-24 00:54:46 +0000679 return( TRUE);
680 }
681 return( FALSE);
682}
683
Erik Andersen6acaa402000-03-26 14:03:20 +0000684
685#ifdef BB_FEATURE_TAR_CREATE
686
Erik Andersen68a9ea42000-04-04 18:39:50 +0000687/* Some info to be carried along when creating a new tarball */
688struct TarBallInfo
689{
690 char* fileName; /* File name of the tarball */
691 int tarFd; /* Open-for-write file descriptor
692 for the tarball */
693 struct stat statBuf; /* Stat info for the tarball, letting
694 us know the inode and device that the
695 tarball lives, so we can avoid trying
696 to include the tarball into itself */
697 int verboseFlag; /* Whether to print extra stuff or not */
Erik Andersenecd51242000-04-08 03:08:21 +0000698 char** excludeList; /* List of files to not include */
Erik Andersen68a9ea42000-04-04 18:39:50 +0000699};
700typedef struct TarBallInfo TarBallInfo;
701
702
Erik Andersen6acaa402000-03-26 14:03:20 +0000703/* Put an octal string into the specified buffer.
704 * The number is zero and space padded and possibly null padded.
705 * Returns TRUE if successful. */
706static int putOctal (char *cp, int len, long value)
707{
708 int tempLength;
Erik Andersen6acaa402000-03-26 14:03:20 +0000709 char tempBuffer[32];
Erik Andersen5661fe02000-04-05 01:00:52 +0000710 char *tempString = tempBuffer;
Erik Andersen6acaa402000-03-26 14:03:20 +0000711
712 /* Create a string of the specified length with an initial space,
713 * leading zeroes and the octal number, and a trailing null. */
Erik Andersen5661fe02000-04-05 01:00:52 +0000714 sprintf (tempString, "%0*lo", len - 1, value);
Erik Andersen6acaa402000-03-26 14:03:20 +0000715
716 /* If the string is too large, suppress the leading space. */
Erik Andersen5661fe02000-04-05 01:00:52 +0000717 tempLength = strlen (tempString) + 1;
Erik Andersen6acaa402000-03-26 14:03:20 +0000718 if (tempLength > len) {
719 tempLength--;
720 tempString++;
721 }
722
723 /* If the string is still too large, suppress the trailing null. */
724 if (tempLength > len)
725 tempLength--;
726
727 /* If the string is still too large, fail. */
728 if (tempLength > len)
729 return FALSE;
730
731 /* Copy the string to the field. */
732 memcpy (cp, tempString, len);
733
734 return TRUE;
735}
736
Erik Andersen68a9ea42000-04-04 18:39:50 +0000737/* Write out a tar header for the specified file/directory/whatever */
Erik Andersen3364d782000-03-28 00:58:14 +0000738static int
Erik Andersen5661fe02000-04-05 01:00:52 +0000739writeTarHeader(struct TarBallInfo *tbInfo, const char *fileName, struct stat *statbuf)
Erik Andersen6acaa402000-03-26 14:03:20 +0000740{
Erik Andersen5661fe02000-04-05 01:00:52 +0000741 long chksum=0;
742 struct TarHeader header;
Erik Andersen0817d132000-04-09 15:17:40 +0000743#if defined BB_FEATURE_TAR_EXCLUDE
Erik Andersenecd51242000-04-08 03:08:21 +0000744 char** tmpList;
Erik Andersen0817d132000-04-09 15:17:40 +0000745#endif
Erik Andersen5661fe02000-04-05 01:00:52 +0000746 const unsigned char *cp = (const unsigned char *) &header;
747 ssize_t size = sizeof(struct TarHeader);
748
749 memset( &header, 0, size);
Erik Andersen3364d782000-03-28 00:58:14 +0000750
Erik Andersen68a9ea42000-04-04 18:39:50 +0000751 if (*fileName=='/') {
752 static int alreadyWarned=FALSE;
753 if (alreadyWarned==FALSE) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000754 errorMsg("Removing leading '/' from member names\n");
Erik Andersen68a9ea42000-04-04 18:39:50 +0000755 alreadyWarned=TRUE;
756 }
Erik Andersen84e09e42000-04-08 20:58:35 +0000757 strncpy(header.name, fileName+1, sizeof(header.name));
Erik Andersen3364d782000-03-28 00:58:14 +0000758 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000759 else {
Erik Andersen84e09e42000-04-08 20:58:35 +0000760 strncpy(header.name, fileName, sizeof(header.name));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000761 }
Erik Andersen84e09e42000-04-08 20:58:35 +0000762
Erik Andersen0817d132000-04-09 15:17:40 +0000763#if defined BB_FEATURE_TAR_EXCLUDE
764 /* Check for excluded files.... */
Erik Andersenecd51242000-04-08 03:08:21 +0000765 for (tmpList=tbInfo->excludeList; tmpList && *tmpList; tmpList++) {
Erik Andersen0817d132000-04-09 15:17:40 +0000766 /* Do some extra hoop jumping for when directory names
767 * end in '/' but the entry in tmpList doesn't */
768 if (strncmp( *tmpList, header.name, strlen(*tmpList))==0 || (
769 header.name[strlen(header.name)-1]=='/'
770 && strncmp( *tmpList, header.name,
771 MIN(strlen(header.name)-1, strlen(*tmpList)))==0)) {
772 /* Set the mode to something that is not a regular file, thereby
773 * faking out writeTarFile into thinking that nothing further need
774 * be done for this file. Yes, I know this is ugly, but it works. */
775 statbuf->st_mode = 0;
776 return( TRUE);
777 }
Erik Andersenecd51242000-04-08 03:08:21 +0000778 }
Erik Andersen0817d132000-04-09 15:17:40 +0000779#endif
Erik Andersenecd51242000-04-08 03:08:21 +0000780
Erik Andersen5661fe02000-04-05 01:00:52 +0000781 putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
782 putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
783 putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
784 putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
785 putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
786 strncpy(header.magic, TAR_MAGIC TAR_VERSION,
787 TAR_MAGIC_LEN + TAR_VERSION_LEN );
Erik Andersen68a9ea42000-04-04 18:39:50 +0000788
Erik Andersen84e09e42000-04-08 20:58:35 +0000789 /* Enter the user and group names (default to root if it fails) */
Erik Andersen5661fe02000-04-05 01:00:52 +0000790 my_getpwuid(header.uname, statbuf->st_uid);
Erik Andersen5661fe02000-04-05 01:00:52 +0000791 if (! *header.uname)
Erik Andersen84e09e42000-04-08 20:58:35 +0000792 strcpy(header.uname, "root");
Erik Andersen5661fe02000-04-05 01:00:52 +0000793 my_getgrgid(header.gname, statbuf->st_gid);
794 if (! *header.uname)
Erik Andersen84e09e42000-04-08 20:58:35 +0000795 strcpy(header.uname, "root");
Erik Andersen5661fe02000-04-05 01:00:52 +0000796
Erik Andersen95c1c1e2000-04-14 21:45:29 +0000797 /* WARNING/NOTICE: I break Hard Links */
Erik Andersen68a9ea42000-04-04 18:39:50 +0000798 if (S_ISLNK(statbuf->st_mode)) {
Eric Andersen3adffb72000-06-26 10:54:06 +0000799 int link_size=0;
Erik Andersen5661fe02000-04-05 01:00:52 +0000800 char buffer[BUFSIZ];
801 header.typeflag = SYMTYPE;
Eric Andersen3adffb72000-06-26 10:54:06 +0000802 link_size = readlink(fileName, buffer, sizeof(buffer) - 1);
803 if ( link_size < 0) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000804 errorMsg("Error reading symlink '%s': %s\n", header.name, strerror(errno));
805 return ( FALSE);
806 }
Eric Andersen3adffb72000-06-26 10:54:06 +0000807 buffer[link_size] = '\0';
Erik Andersen95c1c1e2000-04-14 21:45:29 +0000808 strncpy(header.linkname, buffer, sizeof(header.linkname));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000809 } else if (S_ISDIR(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000810 header.typeflag = DIRTYPE;
811 strncat(header.name, "/", sizeof(header.name));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000812 } else if (S_ISCHR(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000813 header.typeflag = CHRTYPE;
814 putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
815 putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000816 } else if (S_ISBLK(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000817 header.typeflag = BLKTYPE;
818 putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
819 putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
Erik Andersen68a9ea42000-04-04 18:39:50 +0000820 } else if (S_ISFIFO(statbuf->st_mode)) {
Erik Andersen5661fe02000-04-05 01:00:52 +0000821 header.typeflag = FIFOTYPE;
822 } else if (S_ISREG(statbuf->st_mode)) {
823 header.typeflag = REGTYPE;
824 putOctal(header.size, sizeof(header.size), statbuf->st_size);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000825 } else {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000826 errorMsg("%s: Unknown file type\n", fileName);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000827 return ( FALSE);
828 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000829
Erik Andersen5661fe02000-04-05 01:00:52 +0000830 /* Calculate and store the checksum (i.e. the sum of all of the bytes of
831 * the header). The checksum field must be filled with blanks for the
832 * calculation. The checksum field is formatted differently from the
833 * other fields: it has [6] digits, a null, then a space -- rather than
834 * digits, followed by a null like the other fields... */
835 memset(header.chksum, ' ', sizeof(header.chksum));
836 cp = (const unsigned char *) &header;
837 while (size-- > 0)
838 chksum += *cp++;
839 putOctal(header.chksum, 7, chksum);
840
841 /* Now write the header out to disk */
842 if ((size=fullWrite(tbInfo->tarFd, (char*)&header, sizeof(struct TarHeader))) < 0) {
843 errorMsg(io_error, fileName, strerror(errno));
844 return ( FALSE);
845 }
846 /* Pad the header up to the tar block size */
847 for (; size<TAR_BLOCK_SIZE; size++) {
848 write(tbInfo->tarFd, "\0", 1);
849 }
850 /* Now do the verbose thing (or not) */
851 if (tbInfo->verboseFlag==TRUE)
852 fprintf(stdout, "%s\n", header.name);
Erik Andersen3364d782000-03-28 00:58:14 +0000853
854 return ( TRUE);
855}
856
857
Erik Andersen68a9ea42000-04-04 18:39:50 +0000858static int writeFileToTarball(const char *fileName, struct stat *statbuf, void* userData)
Erik Andersen3364d782000-03-28 00:58:14 +0000859{
Erik Andersen68a9ea42000-04-04 18:39:50 +0000860 struct TarBallInfo *tbInfo = (struct TarBallInfo *)userData;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000861
862 /* It is against the rules to archive a socket */
863 if (S_ISSOCK(statbuf->st_mode)) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000864 errorMsg("%s: socket ignored\n", fileName);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000865 return( TRUE);
866 }
867
868 /* It is a bad idea to store the archive we are in the process of creating,
869 * so check the device and inode to be sure that this particular file isn't
870 * the new tarball */
871 if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
872 tbInfo->statBuf.st_ino == statbuf->st_ino) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000873 errorMsg("%s: file is the archive; skipping\n", fileName);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000874 return( TRUE);
875 }
876
Erik Andersen5661fe02000-04-05 01:00:52 +0000877 if (writeTarHeader(tbInfo, fileName, statbuf)==FALSE) {
878 return( FALSE);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000879 }
Erik Andersen5661fe02000-04-05 01:00:52 +0000880
881 /* Now, if the file is a regular file, copy it out to the tarball */
882 if (S_ISREG(statbuf->st_mode)) {
883 int inputFileFd;
884 char buffer[BUFSIZ];
885 ssize_t size=0, readSize=0;
886
887 /* open the file we want to archive, and make sure all is well */
888 if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000889 errorMsg("%s: Cannot open: %s\n", fileName, strerror(errno));
Erik Andersen5661fe02000-04-05 01:00:52 +0000890 return( FALSE);
891 }
892
893 /* write the file to the archive */
894 while ( (size = fullRead(inputFileFd, buffer, sizeof(buffer))) > 0 ) {
895 if (fullWrite(tbInfo->tarFd, buffer, size) != size ) {
896 /* Output file seems to have a problem */
897 errorMsg(io_error, fileName, strerror(errno));
898 return( FALSE);
899 }
900 readSize+=size;
901 }
902 if (size == -1) {
903 errorMsg(io_error, fileName, strerror(errno));
904 return( FALSE);
905 }
906 /* Pad the file up to the tar block size */
907 for (; (readSize%TAR_BLOCK_SIZE) != 0; readSize++) {
908 write(tbInfo->tarFd, "\0", 1);
909 }
910 close( inputFileFd);
911 }
Erik Andersen68a9ea42000-04-04 18:39:50 +0000912
913 return( TRUE);
Erik Andersen6acaa402000-03-26 14:03:20 +0000914}
915
Erik Andersen68a9ea42000-04-04 18:39:50 +0000916static int writeTarFile(const char* tarName, int tostdoutFlag,
Erik Andersenecd51242000-04-08 03:08:21 +0000917 int verboseFlag, int argc, char **argv, char** excludeList)
Erik Andersen6acaa402000-03-26 14:03:20 +0000918{
Erik Andersen3364d782000-03-28 00:58:14 +0000919 int tarFd=-1;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000920 int errorFlag=FALSE;
Erik Andersen5661fe02000-04-05 01:00:52 +0000921 ssize_t size;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000922 struct TarBallInfo tbInfo;
923 tbInfo.verboseFlag = verboseFlag;
Erik Andersen3364d782000-03-28 00:58:14 +0000924
925 /* Make sure there is at least one file to tar up. */
926 if (argc <= 0)
Matt Kraaibe84cd42000-07-12 17:02:35 +0000927 fatalError("Cowardly refusing to create an empty archive\n");
Erik Andersen6acaa402000-03-26 14:03:20 +0000928
929 /* Open the tar file for writing. */
Erik Andersen3364d782000-03-28 00:58:14 +0000930 if (tostdoutFlag == TRUE)
Erik Andersen68a9ea42000-04-04 18:39:50 +0000931 tbInfo.tarFd = fileno(stdout);
Erik Andersen6acaa402000-03-26 14:03:20 +0000932 else
Erik Andersen68a9ea42000-04-04 18:39:50 +0000933 tbInfo.tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
934 if (tbInfo.tarFd < 0) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000935 errorMsg( "Error opening '%s': %s\n", tarName, strerror(errno));
Erik Andersen6acaa402000-03-26 14:03:20 +0000936 return ( FALSE);
937 }
Erik Andersenecd51242000-04-08 03:08:21 +0000938 tbInfo.excludeList=excludeList;
Erik Andersen68a9ea42000-04-04 18:39:50 +0000939 /* Store the stat info for the tarball's file, so
940 * can avoid including the tarball into itself.... */
941 if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
Erik Andersen3364d782000-03-28 00:58:14 +0000942 fatalError(io_error, tarName, strerror(errno));
Erik Andersen6acaa402000-03-26 14:03:20 +0000943
944 /* Set the umask for this process so it doesn't
945 * screw up permission setting for us later. */
946 umask(0);
947
948 /* Read the directory/files and iterate over them one at a time */
Erik Andersen3364d782000-03-28 00:58:14 +0000949 while (argc-- > 0) {
950 if (recursiveAction(*argv++, TRUE, FALSE, FALSE,
Erik Andersen68a9ea42000-04-04 18:39:50 +0000951 writeFileToTarball, writeFileToTarball,
952 (void*) &tbInfo) == FALSE) {
953 errorFlag = TRUE;
Erik Andersen3364d782000-03-28 00:58:14 +0000954 }
Erik Andersen6acaa402000-03-26 14:03:20 +0000955 }
Erik Andersen5661fe02000-04-05 01:00:52 +0000956 /* Write two empty blocks to the end of the archive */
957 for (size=0; size<(2*TAR_BLOCK_SIZE); size++) {
958 write(tbInfo.tarFd, "\0", 1);
959 }
Erik Andersen0817d132000-04-09 15:17:40 +0000960
961 /* To be pedantically correct, we would check if the tarball
962 * is smaller then 20 tar blocks, and pad it if it was smaller,
963 * but that isn't necessary for GNU tar interoperability, and
964 * so is considered a waste of space */
965
Erik Andersen68a9ea42000-04-04 18:39:50 +0000966 /* Hang up the tools, close up shop, head home */
Erik Andersen6acaa402000-03-26 14:03:20 +0000967 close(tarFd);
Erik Andersen68a9ea42000-04-04 18:39:50 +0000968 if (errorFlag == TRUE) {
Matt Kraaibe84cd42000-07-12 17:02:35 +0000969 errorMsg("Error exit delayed from previous errors\n");
Erik Andersen68a9ea42000-04-04 18:39:50 +0000970 return(FALSE);
971 }
Erik Andersen6acaa402000-03-26 14:03:20 +0000972 return( TRUE);
973}
974
975
976#endif
977