Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1 | /* |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 2 | * Mini tar implementation for busybox based on code taken from sash. |
| 3 | * |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 4 | * Copyright (c) 1999 by David I. Bell |
| 5 | * Permission is granted to use, distribute, or modify this source, |
| 6 | * provided that this copyright notice remains intact. |
| 7 | * |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 8 | * Permission to distribute this code under the GPL has been granted. |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 9 | * |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 10 | * Modified for busybox by Erik Andersen <andersee@debian.org> |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 11 | * Adjusted to grok stdin/stdout options. |
| 12 | * |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 13 | * Modified to handle device special files by Matt Porter |
| 14 | * <porter@debian.org> |
| 15 | * |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 16 | * This program is free software; you can redistribute it and/or modify |
| 17 | * it under the terms of the GNU General Public License as published by |
| 18 | * the Free Software Foundation; either version 2 of the License, or |
| 19 | * (at your option) any later version. |
| 20 | * |
| 21 | * This program is distributed in the hope that it will be useful, |
| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 24 | * General Public License for more details. |
| 25 | * |
| 26 | * You should have received a copy of the GNU General Public License |
| 27 | * along with this program; if not, write to the Free Software |
| 28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 29 | * |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 30 | */ |
| 31 | |
| 32 | |
| 33 | #include "internal.h" |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 34 | #include <stdio.h> |
| 35 | #include <dirent.h> |
| 36 | #include <errno.h> |
| 37 | #include <fcntl.h> |
| 38 | #include <signal.h> |
| 39 | #include <time.h> |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 40 | #include <sys/types.h> |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 41 | #include <sys/sysmacros.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 42 | |
Eric Andersen | e77ae3a | 1999-10-19 20:03:34 +0000 | [diff] [blame] | 43 | |
| 44 | static const char tar_usage[] = |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 45 | "tar -[cxtvOf] [tarFileName] [FILE] ...\n\n" |
| 46 | "Create, extract, or list files from a tar file\n\n" |
| 47 | "Options:\n" |
| 48 | "\tc=create, x=extract, t=list contents, v=verbose,\n" |
| 49 | "\tO=extract to stdout, f=tarfile or \"-\" for stdin\n"; |
Eric Andersen | e77ae3a | 1999-10-19 20:03:34 +0000 | [diff] [blame] | 50 | |
| 51 | |
| 52 | |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 53 | /* |
| 54 | * Tar file constants. |
| 55 | */ |
| 56 | #define TAR_BLOCK_SIZE 512 |
| 57 | #define TAR_NAME_SIZE 100 |
| 58 | |
| 59 | |
| 60 | /* |
| 61 | * The POSIX (and basic GNU) tar header format. |
| 62 | * This structure is always embedded in a TAR_BLOCK_SIZE sized block |
| 63 | * with zero padding. We only process this information minimally. |
| 64 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 65 | typedef struct { |
| 66 | char name[TAR_NAME_SIZE]; |
| 67 | char mode[8]; |
| 68 | char uid[8]; |
| 69 | char gid[8]; |
| 70 | char size[12]; |
| 71 | char mtime[12]; |
| 72 | char checkSum[8]; |
| 73 | char typeFlag; |
| 74 | char linkName[TAR_NAME_SIZE]; |
| 75 | char magic[6]; |
| 76 | char version[2]; |
| 77 | char uname[32]; |
| 78 | char gname[32]; |
| 79 | char devMajor[8]; |
| 80 | char devMinor[8]; |
| 81 | char prefix[155]; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 82 | } TarHeader; |
| 83 | |
| 84 | #define TAR_MAGIC "ustar" |
| 85 | #define TAR_VERSION "00" |
| 86 | |
| 87 | #define TAR_TYPE_REGULAR '0' |
| 88 | #define TAR_TYPE_HARD_LINK '1' |
| 89 | #define TAR_TYPE_SOFT_LINK '2' |
| 90 | |
| 91 | |
| 92 | /* |
| 93 | * Static data. |
| 94 | */ |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 95 | static int listFlag; |
| 96 | static int extractFlag; |
| 97 | static int createFlag; |
| 98 | static int verboseFlag; |
| 99 | static int tostdoutFlag; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 100 | |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 101 | static int inHeader; // <- check me |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 102 | static int badHeader; |
| 103 | static int errorFlag; |
| 104 | static int skipFileFlag; |
| 105 | static int warnedRoot; |
| 106 | static int eofFlag; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 107 | static long dataCc; |
| 108 | static int outFd; |
| 109 | static char outName[TAR_NAME_SIZE]; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 110 | |
| 111 | |
| 112 | /* |
| 113 | * Static data associated with the tar file. |
| 114 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 115 | static const char *tarName; |
| 116 | static int tarFd; |
| 117 | static dev_t tarDev; |
| 118 | static ino_t tarInode; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 119 | |
| 120 | |
| 121 | /* |
| 122 | * Local procedures to restore files from a tar file. |
| 123 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 124 | static void readTarFile (int fileCount, char **fileTable); |
| 125 | static void readData (const char *cp, int count); |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 126 | static long getOctal (const char *cp, int len); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 127 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 128 | static void readHeader (const TarHeader * hp, |
| 129 | int fileCount, char **fileTable); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 130 | |
| 131 | |
| 132 | /* |
| 133 | * Local procedures to save files into a tar file. |
| 134 | */ |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 135 | static void saveFile (const char *fileName, int seeLinks); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 136 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 137 | static void saveRegularFile (const char *fileName, |
| 138 | const struct stat *statbuf); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 139 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 140 | static void saveDirectory (const char *fileName, |
| 141 | const struct stat *statbuf); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 142 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 143 | static int wantFileName (const char *fileName, |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 144 | int fileCount, char **fileTable); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 145 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 146 | static void writeHeader (const char *fileName, const struct stat *statbuf); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 147 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 148 | static void writeTarFile (int fileCount, char **fileTable); |
| 149 | static void writeTarBlock (const char *buf, int len); |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 150 | static int putOctal (char *cp, int len, long value); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 151 | |
| 152 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 153 | extern int tar_main (int argc, char **argv) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 154 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 155 | const char *options; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 156 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 157 | argc--; |
| 158 | argv++; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 159 | |
Eric Andersen | be971d6 | 1999-11-03 16:52:50 +0000 | [diff] [blame] | 160 | if (argc < 1) |
| 161 | usage( tar_usage); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 162 | |
| 163 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 164 | errorFlag = FALSE; |
| 165 | extractFlag = FALSE; |
| 166 | createFlag = FALSE; |
| 167 | listFlag = FALSE; |
| 168 | verboseFlag = FALSE; |
| 169 | tostdoutFlag = FALSE; |
| 170 | tarName = NULL; |
| 171 | tarDev = 0; |
| 172 | tarInode = 0; |
| 173 | tarFd = -1; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 174 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 175 | /* |
| 176 | * Parse the options. |
| 177 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 178 | if (**argv == '-') { |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 179 | options = (*argv++) + 1; |
| 180 | argc--; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 181 | for (; *options; options++) { |
| 182 | switch (*options) { |
| 183 | case 'f': |
| 184 | if (tarName != NULL) { |
| 185 | fprintf (stderr, "Only one 'f' option allowed\n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 186 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 187 | exit (FALSE); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 188 | } |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 189 | |
| 190 | tarName = *argv++; |
| 191 | argc--; |
| 192 | |
| 193 | break; |
| 194 | |
| 195 | case 't': |
| 196 | listFlag = TRUE; |
| 197 | break; |
| 198 | |
| 199 | case 'x': |
| 200 | extractFlag = TRUE; |
| 201 | break; |
| 202 | |
| 203 | case 'c': |
| 204 | createFlag = TRUE; |
| 205 | break; |
| 206 | |
| 207 | case 'v': |
| 208 | verboseFlag = TRUE; |
| 209 | break; |
| 210 | |
| 211 | case 'O': |
| 212 | tostdoutFlag = TRUE; |
| 213 | break; |
| 214 | |
| 215 | case '-': |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 216 | usage( tar_usage); |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 217 | break; |
| 218 | |
| 219 | default: |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 220 | fprintf (stderr, "Unknown tar flag '%c'\n" |
| 221 | "Try `tar --help' for more information\n", |
| 222 | *options); |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 223 | |
| 224 | exit (FALSE); |
| 225 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 226 | } |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 227 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 228 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 229 | /* |
| 230 | * Validate the options. |
| 231 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 232 | if (extractFlag + listFlag + createFlag != (TRUE+FALSE+FALSE)) { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 233 | fprintf (stderr, |
| 234 | "Exactly one of 'c', 'x' or 't' must be specified\n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 235 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 236 | exit (FALSE); |
| 237 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 238 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 239 | /* |
| 240 | * Do the correct type of action supplying the rest of the |
| 241 | * command line arguments as the list of files to process. |
| 242 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 243 | if (createFlag==TRUE) |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 244 | writeTarFile (argc, argv); |
| 245 | else |
| 246 | readTarFile (argc, argv); |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 247 | if (errorFlag==TRUE) |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 248 | fprintf (stderr, "\n"); |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 249 | exit (!errorFlag); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | |
| 253 | /* |
| 254 | * Read a tar file and extract or list the specified files within it. |
| 255 | * If the list is empty than all files are extracted or listed. |
| 256 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 257 | static void readTarFile (int fileCount, char **fileTable) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 258 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 259 | const char *cp; |
| 260 | int cc; |
| 261 | int inCc; |
| 262 | int blockSize; |
| 263 | char buf[BUF_SIZE]; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 264 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 265 | skipFileFlag = FALSE; |
| 266 | badHeader = FALSE; |
| 267 | warnedRoot = FALSE; |
| 268 | eofFlag = FALSE; |
| 269 | inHeader = TRUE; |
| 270 | inCc = 0; |
| 271 | dataCc = 0; |
| 272 | outFd = -1; |
| 273 | blockSize = sizeof (buf); |
| 274 | cp = buf; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 275 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 276 | /* |
| 277 | * Open the tar file for reading. |
| 278 | */ |
| 279 | if ((tarName == NULL) || !strcmp (tarName, "-")) { |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 280 | tarFd = fileno(stdin); |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 281 | } else |
| 282 | tarFd = open (tarName, O_RDONLY); |
| 283 | |
| 284 | if (tarFd < 0) { |
| 285 | perror (tarName); |
| 286 | errorFlag = TRUE; |
| 287 | return; |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * Read blocks from the file until an end of file header block |
| 292 | * has been seen. (A real end of file from a read is an error.) |
| 293 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 294 | while (eofFlag==FALSE) { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 295 | /* |
| 296 | * Read the next block of data if necessary. |
| 297 | * This will be a large block if possible, which we will |
| 298 | * then process in the small tar blocks. |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 299 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 300 | if (inCc <= 0) { |
| 301 | cp = buf; |
| 302 | inCc = fullRead (tarFd, buf, blockSize); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 303 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 304 | if (inCc < 0) { |
| 305 | perror (tarName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 306 | errorFlag = TRUE; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 307 | goto done; |
| 308 | } |
| 309 | |
| 310 | if (inCc == 0) { |
| 311 | fprintf (stderr, |
| 312 | "Unexpected end of file from \"%s\"", tarName); |
| 313 | errorFlag = TRUE; |
| 314 | goto done; |
| 315 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 316 | } |
| 317 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 318 | /* |
| 319 | * If we are expecting a header block then examine it. |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 320 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 321 | if (inHeader==TRUE) { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 322 | readHeader ((const TarHeader *) cp, fileCount, fileTable); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 323 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 324 | cp += TAR_BLOCK_SIZE; |
| 325 | inCc -= TAR_BLOCK_SIZE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 326 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 327 | continue; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 328 | } |
| 329 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 330 | /* |
| 331 | * We are currently handling the data for a file. |
| 332 | * Process the minimum of the amount of data we have available |
| 333 | * and the amount left to be processed for the file. |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 334 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 335 | cc = inCc; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 336 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 337 | if (cc > dataCc) |
| 338 | cc = dataCc; |
| 339 | |
| 340 | readData (cp, cc); |
| 341 | |
| 342 | /* |
| 343 | * If the amount left isn't an exact multiple of the tar block |
| 344 | * size then round it up to the next block boundary since there |
| 345 | * is padding at the end of the file. |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 346 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 347 | if (cc % TAR_BLOCK_SIZE) |
| 348 | cc += TAR_BLOCK_SIZE - (cc % TAR_BLOCK_SIZE); |
| 349 | |
| 350 | cp += cc; |
| 351 | inCc -= cc; |
| 352 | } |
| 353 | |
| 354 | done: |
| 355 | /* |
| 356 | * Close the tar file if needed. |
| 357 | */ |
| 358 | if ((tarFd >= 0) && (close (tarFd) < 0)) |
| 359 | perror (tarName); |
| 360 | |
| 361 | /* |
| 362 | * Close the output file if needed. |
| 363 | * This is only done here on a previous error and so no |
| 364 | * message is required on errors. |
| 365 | */ |
| 366 | if (tostdoutFlag == FALSE) { |
| 367 | if (outFd >= 0) |
| 368 | (void) close (outFd); |
| 369 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 370 | } |
| 371 | |
| 372 | |
| 373 | /* |
| 374 | * Examine the header block that was just read. |
| 375 | * This can specify the information for another file, or it can mark |
| 376 | * the end of the tar file. |
| 377 | */ |
| 378 | static void |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 379 | readHeader (const TarHeader * hp, int fileCount, char **fileTable) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 380 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 381 | int mode; |
| 382 | int uid; |
| 383 | int gid; |
| 384 | int checkSum; |
Eric Andersen | 03018f7 | 1999-11-29 04:29:13 +0000 | [diff] [blame] | 385 | unsigned int major; |
| 386 | unsigned int minor; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 387 | long size; |
| 388 | time_t mtime; |
| 389 | const char *name; |
| 390 | int cc; |
| 391 | int hardLink; |
| 392 | int softLink; |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 393 | int devFileFlag; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 394 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 395 | /* |
| 396 | * If the block is completely empty, then this is the end of the |
| 397 | * archive file. If the name is null, then just skip this header. |
| 398 | */ |
| 399 | name = hp->name; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 400 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 401 | if (*name == '\0') { |
| 402 | for (cc = TAR_BLOCK_SIZE; cc > 0; cc--) { |
| 403 | if (*name++) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 404 | return; |
| 405 | } |
| 406 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 407 | eofFlag = TRUE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 408 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 409 | return; |
| 410 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 411 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 412 | /* |
| 413 | * There is another file in the archive to examine. |
| 414 | * Extract the encoded information and check it. |
| 415 | */ |
| 416 | mode = getOctal (hp->mode, sizeof (hp->mode)); |
| 417 | uid = getOctal (hp->uid, sizeof (hp->uid)); |
| 418 | gid = getOctal (hp->gid, sizeof (hp->gid)); |
| 419 | size = getOctal (hp->size, sizeof (hp->size)); |
| 420 | mtime = getOctal (hp->mtime, sizeof (hp->mtime)); |
| 421 | checkSum = getOctal (hp->checkSum, sizeof (hp->checkSum)); |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 422 | major = getOctal (hp->devMajor, sizeof (hp->devMajor)); |
| 423 | minor = getOctal (hp->devMinor, sizeof (hp->devMinor)); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 424 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 425 | if ((mode < 0) || (uid < 0) || (gid < 0) || (size < 0)) { |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 426 | if (badHeader==FALSE) |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 427 | fprintf (stderr, "Bad tar header, skipping\n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 428 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 429 | badHeader = TRUE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 430 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 431 | return; |
| 432 | } |
| 433 | |
| 434 | badHeader = FALSE; |
| 435 | skipFileFlag = FALSE; |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 436 | devFileFlag = FALSE; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 437 | |
| 438 | /* |
| 439 | * Check for the file modes. |
| 440 | */ |
| 441 | hardLink = ((hp->typeFlag == TAR_TYPE_HARD_LINK) || |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 442 | (hp->typeFlag == TAR_TYPE_HARD_LINK - '0')); |
| 443 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 444 | softLink = ((hp->typeFlag == TAR_TYPE_SOFT_LINK) || |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 445 | (hp->typeFlag == TAR_TYPE_SOFT_LINK - '0')); |
| 446 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 447 | /* |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 448 | * Check for a directory. |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 449 | */ |
| 450 | if (name[strlen (name) - 1] == '/') |
| 451 | mode |= S_IFDIR; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 452 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 453 | /* |
| 454 | * Check for absolute paths in the file. |
| 455 | * If we find any, then warn the user and make them relative. |
| 456 | */ |
| 457 | if (*name == '/') { |
| 458 | while (*name == '/') |
| 459 | name++; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 460 | |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 461 | if (warnedRoot==FALSE) { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 462 | fprintf (stderr, |
| 463 | "Absolute path detected, removing leading slashes\n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 464 | } |
| 465 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 466 | warnedRoot = TRUE; |
| 467 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 468 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 469 | /* |
| 470 | * See if we want this file to be restored. |
| 471 | * If not, then set up to skip it. |
| 472 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 473 | if (wantFileName (name, fileCount, fileTable) == FALSE) { |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 474 | if ( !hardLink && !softLink && (S_ISREG (mode) || S_ISCHR (mode) |
| 475 | || S_ISBLK (mode) || S_ISSOCK(mode) || S_ISFIFO(mode) ) ) { |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 476 | inHeader = (size == 0)? TRUE : FALSE; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 477 | dataCc = size; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 478 | } |
| 479 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 480 | skipFileFlag = TRUE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 481 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 482 | return; |
| 483 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 484 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 485 | /* |
| 486 | * This file is to be handled. |
| 487 | * If we aren't extracting then just list information about the file. |
| 488 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 489 | if (extractFlag==FALSE) { |
| 490 | if (verboseFlag==TRUE) { |
Eric Andersen | 03018f7 | 1999-11-29 04:29:13 +0000 | [diff] [blame] | 491 | printf ("%s %3d/%-d ", modeString (mode), uid, gid); |
| 492 | if( S_ISCHR (mode) || S_ISBLK (mode) ) |
| 493 | printf ("%4d,%4d %s ", major,minor, timeString (mtime)); |
| 494 | else |
| 495 | printf ("%9ld %s ", size, timeString (mtime)); |
| 496 | } |
| 497 | printf ("%s", name); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 498 | |
| 499 | if (hardLink) |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 500 | printf (" (link to \"%s\")", hp->linkName); |
| 501 | else if (softLink) |
| 502 | printf (" (symlink to \"%s\")", hp->linkName); |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 503 | else if (S_ISREG (mode) || S_ISCHR (mode) || S_ISBLK (mode) || |
| 504 | S_ISSOCK(mode) || S_ISFIFO(mode) ) { |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 505 | inHeader = (size == 0)? TRUE : FALSE; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 506 | dataCc = size; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 507 | } |
| 508 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 509 | printf ("\n"); |
| 510 | |
| 511 | return; |
| 512 | } |
| 513 | |
| 514 | /* |
| 515 | * We really want to extract the file. |
| 516 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 517 | if (verboseFlag==TRUE) |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 518 | printf ("x %s\n", name); |
| 519 | |
| 520 | if (hardLink) { |
| 521 | if (link (hp->linkName, name) < 0) |
| 522 | perror (name); |
Eric Andersen | 03018f7 | 1999-11-29 04:29:13 +0000 | [diff] [blame] | 523 | chmod(name, mode); |
| 524 | chown(name, uid, gid); |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 525 | return; |
| 526 | } |
| 527 | |
| 528 | if (softLink) { |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 529 | #ifdef S_ISLNK |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 530 | if (symlink (hp->linkName, name) < 0) |
| 531 | perror (name); |
Eric Andersen | 03018f7 | 1999-11-29 04:29:13 +0000 | [diff] [blame] | 532 | chmod(name, mode); |
| 533 | chown(name, uid, gid); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 534 | #else |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 535 | fprintf (stderr, "Cannot create symbolic links\n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 536 | #endif |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 537 | return; |
| 538 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 539 | |
Eric Andersen | 03018f7 | 1999-11-29 04:29:13 +0000 | [diff] [blame] | 540 | /* Set the umask for this process so it doesn't |
| 541 | * screw things up. */ |
| 542 | umask(0); |
| 543 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 544 | /* |
| 545 | * If the file is a directory, then just create the path. |
| 546 | */ |
| 547 | if (S_ISDIR (mode)) { |
| 548 | createPath (name, mode); |
Eric Andersen | 03018f7 | 1999-11-29 04:29:13 +0000 | [diff] [blame] | 549 | chmod(name, mode); |
| 550 | chown(name, uid, gid); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 551 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 552 | return; |
| 553 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 554 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 555 | /* |
| 556 | * There is a file to write. |
Eric Andersen | 03018f7 | 1999-11-29 04:29:13 +0000 | [diff] [blame] | 557 | * First create the path to it if necessary with default permissions. |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 558 | */ |
| 559 | createPath (name, 0777); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 560 | |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 561 | inHeader = (size == 0)? TRUE : FALSE; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 562 | dataCc = size; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 563 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 564 | /* |
| 565 | * Start the output file. |
| 566 | */ |
| 567 | if (tostdoutFlag == TRUE) |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 568 | outFd = fileno(stdout); |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 569 | else { |
| 570 | if ( S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) ) { |
| 571 | devFileFlag = TRUE; |
| 572 | outFd = mknod (name, mode, makedev(major, minor) ); |
| 573 | } |
| 574 | else if (S_ISFIFO(mode) ) { |
Eric Andersen | b6a44b8 | 1999-11-13 04:47:09 +0000 | [diff] [blame] | 575 | devFileFlag = TRUE; |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 576 | outFd = mkfifo(name, mode); |
| 577 | } else { |
| 578 | outFd = open (name, O_WRONLY | O_CREAT | O_TRUNC, mode); |
| 579 | } |
| 580 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 581 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 582 | if (outFd < 0) { |
| 583 | perror (name); |
| 584 | skipFileFlag = TRUE; |
| 585 | return; |
| 586 | } |
Eric Andersen | 03018f7 | 1999-11-29 04:29:13 +0000 | [diff] [blame] | 587 | if (tostdoutFlag == FALSE) { |
| 588 | fchmod(outFd, mode); |
| 589 | fchown(outFd, uid, gid); |
| 590 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 591 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 592 | /* |
| 593 | * If the file is empty, then that's all we need to do. |
| 594 | */ |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 595 | if (size == 0 && (tostdoutFlag == FALSE) && (devFileFlag == FALSE)) { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 596 | (void) close (outFd); |
| 597 | outFd = -1; |
| 598 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | |
| 602 | /* |
| 603 | * Handle a data block of some specified size that was read. |
| 604 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 605 | static void readData (const char *cp, int count) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 606 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 607 | /* |
| 608 | * Reduce the amount of data left in this file. |
| 609 | * If there is no more data left, then we need to read |
| 610 | * the header again. |
| 611 | */ |
| 612 | dataCc -= count; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 613 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 614 | if (dataCc <= 0) |
| 615 | inHeader = TRUE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 616 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 617 | /* |
| 618 | * If we aren't extracting files or this file is being |
| 619 | * skipped then do nothing more. |
| 620 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 621 | if (extractFlag==FALSE || skipFileFlag==TRUE) |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 622 | return; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 623 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 624 | /* |
| 625 | * Write the data to the output file. |
| 626 | */ |
| 627 | if (fullWrite (outFd, cp, count) < 0) { |
| 628 | perror (outName); |
| 629 | if (tostdoutFlag == FALSE) { |
| 630 | (void) close (outFd); |
| 631 | outFd = -1; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 632 | } |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 633 | skipFileFlag = TRUE; |
| 634 | return; |
| 635 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 636 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 637 | /* |
| 638 | * If the write failed, close the file and disable further |
| 639 | * writes to this file. |
| 640 | */ |
| 641 | if (dataCc <= 0 && tostdoutFlag == FALSE) { |
| 642 | if (close (outFd)) |
| 643 | perror (outName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 644 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 645 | outFd = -1; |
| 646 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | |
| 650 | /* |
| 651 | * Write a tar file containing the specified files. |
| 652 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 653 | static void writeTarFile (int fileCount, char **fileTable) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 654 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 655 | struct stat statbuf; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 656 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 657 | /* |
| 658 | * Make sure there is at least one file specified. |
| 659 | */ |
| 660 | if (fileCount <= 0) { |
| 661 | fprintf (stderr, "No files specified to be saved\n"); |
| 662 | errorFlag = TRUE; |
| 663 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 664 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 665 | /* |
| 666 | * Create the tar file for writing. |
| 667 | */ |
| 668 | if ((tarName == NULL) || !strcmp (tarName, "-")) { |
| 669 | tostdoutFlag = TRUE; |
Eric Andersen | 08b1034 | 1999-11-19 02:38:58 +0000 | [diff] [blame] | 670 | tarFd = fileno(stdout); |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 671 | } else |
| 672 | tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0666); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 673 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 674 | if (tarFd < 0) { |
| 675 | perror (tarName); |
| 676 | errorFlag = TRUE; |
| 677 | return; |
| 678 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 679 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 680 | /* |
| 681 | * Get the device and inode of the tar file for checking later. |
| 682 | */ |
| 683 | if (fstat (tarFd, &statbuf) < 0) { |
| 684 | perror (tarName); |
| 685 | errorFlag = TRUE; |
| 686 | goto done; |
| 687 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 688 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 689 | tarDev = statbuf.st_dev; |
| 690 | tarInode = statbuf.st_ino; |
Eric Andersen | 03018f7 | 1999-11-29 04:29:13 +0000 | [diff] [blame] | 691 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 692 | /* |
| 693 | * Append each file name into the archive file. |
| 694 | * Follow symbolic links for these top level file names. |
| 695 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 696 | while (errorFlag==FALSE && (fileCount-- > 0)) { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 697 | saveFile (*fileTable++, FALSE); |
| 698 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 699 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 700 | /* |
| 701 | * Now write an empty block of zeroes to end the archive. |
| 702 | */ |
| 703 | writeTarBlock ("", 1); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 704 | |
| 705 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 706 | done: |
| 707 | /* |
| 708 | * Close the tar file and check for errors if it was opened. |
| 709 | */ |
| 710 | if ((tostdoutFlag == FALSE) && (tarFd >= 0) && (close (tarFd) < 0)) |
| 711 | perror (tarName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 712 | } |
| 713 | |
| 714 | |
| 715 | /* |
| 716 | * Save one file into the tar file. |
| 717 | * If the file is a directory, then this will recursively save all of |
| 718 | * the files and directories within the directory. The seeLinks |
| 719 | * flag indicates whether or not we want to see symbolic links as |
| 720 | * they really are, instead of blindly following them. |
| 721 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 722 | static void saveFile (const char *fileName, int seeLinks) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 723 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 724 | int status; |
| 725 | int mode; |
| 726 | struct stat statbuf; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 727 | |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 728 | if (verboseFlag==TRUE) |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 729 | printf ("a %s\n", fileName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 730 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 731 | /* |
| 732 | * Check that the file name will fit in the header. |
| 733 | */ |
| 734 | if (strlen (fileName) >= TAR_NAME_SIZE) { |
| 735 | fprintf (stderr, "%s: File name is too long\n", fileName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 736 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 737 | return; |
| 738 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 739 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 740 | /* |
| 741 | * Find out about the file. |
| 742 | */ |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 743 | #ifdef S_ISLNK |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 744 | if (seeLinks==TRUE) |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 745 | status = lstat (fileName, &statbuf); |
| 746 | else |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 747 | #endif |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 748 | status = stat (fileName, &statbuf); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 749 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 750 | if (status < 0) { |
| 751 | perror (fileName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 752 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 753 | return; |
| 754 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 755 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 756 | /* |
| 757 | * Make sure we aren't trying to save our file into itself. |
| 758 | */ |
| 759 | if ((statbuf.st_dev == tarDev) && (statbuf.st_ino == tarInode)) { |
| 760 | fprintf (stderr, "Skipping saving of archive file itself\n"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 761 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 762 | return; |
| 763 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 764 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 765 | /* |
| 766 | * Check the type of file. |
| 767 | */ |
| 768 | mode = statbuf.st_mode; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 769 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 770 | if (S_ISDIR (mode)) { |
| 771 | saveDirectory (fileName, &statbuf); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 772 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 773 | return; |
| 774 | } |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 775 | if (S_ISREG (mode)) { |
| 776 | saveRegularFile (fileName, &statbuf); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 777 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 778 | return; |
| 779 | } |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 780 | |
| 781 | /* Some day add support for tarring these up... but not today. :) */ |
| 782 | // if (S_ISLNK(mode) || S_ISFIFO(mode) || S_ISBLK(mode) || S_ISCHR (mode) ) { |
| 783 | // fprintf (stderr, "%s: This version of tar can't store this type of file\n", fileName); |
| 784 | // } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 785 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 786 | /* |
| 787 | * The file is a strange type of file, ignore it. |
| 788 | */ |
| 789 | fprintf (stderr, "%s: not a directory or regular file\n", fileName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | |
| 793 | /* |
| 794 | * Save a regular file to the tar file. |
| 795 | */ |
| 796 | static void |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 797 | saveRegularFile (const char *fileName, const struct stat *statbuf) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 798 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 799 | int sawEof; |
| 800 | int fileFd; |
| 801 | int cc; |
| 802 | int dataCount; |
| 803 | long fullDataCount; |
| 804 | char data[TAR_BLOCK_SIZE * 16]; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 805 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 806 | /* |
| 807 | * Open the file for reading. |
| 808 | */ |
| 809 | fileFd = open (fileName, O_RDONLY); |
| 810 | |
| 811 | if (fileFd < 0) { |
| 812 | perror (fileName); |
| 813 | |
| 814 | return; |
| 815 | } |
| 816 | |
| 817 | /* |
| 818 | * Write out the header for the file. |
| 819 | */ |
| 820 | writeHeader (fileName, statbuf); |
| 821 | |
| 822 | /* |
| 823 | * Write the data blocks of the file. |
| 824 | * We must be careful to write the amount of data that the stat |
| 825 | * buffer indicated, even if the file has changed size. Otherwise |
| 826 | * the tar file will be incorrect. |
| 827 | */ |
| 828 | fullDataCount = statbuf->st_size; |
| 829 | sawEof = FALSE; |
| 830 | |
| 831 | while (fullDataCount > 0) { |
| 832 | /* |
| 833 | * Get the amount to write this iteration which is |
| 834 | * the minumum of the amount left to write and the |
| 835 | * buffer size. |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 836 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 837 | dataCount = sizeof (data); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 838 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 839 | if (dataCount > fullDataCount) |
| 840 | dataCount = (int) fullDataCount; |
| 841 | |
| 842 | /* |
| 843 | * Read the data from the file if we haven't seen the |
| 844 | * end of file yet. |
| 845 | */ |
| 846 | cc = 0; |
| 847 | |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 848 | if (sawEof==FALSE) { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 849 | cc = fullRead (fileFd, data, dataCount); |
| 850 | |
| 851 | if (cc < 0) { |
| 852 | perror (fileName); |
| 853 | |
| 854 | (void) close (fileFd); |
| 855 | errorFlag = TRUE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 856 | |
| 857 | return; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 858 | } |
| 859 | |
| 860 | /* |
| 861 | * If the file ended too soon, complain and set |
| 862 | * a flag so we will zero fill the rest of it. |
| 863 | */ |
| 864 | if (cc < dataCount) { |
| 865 | fprintf (stderr, |
| 866 | "%s: Short read - zero filling", fileName); |
| 867 | |
| 868 | sawEof = TRUE; |
| 869 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 870 | } |
| 871 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 872 | /* |
| 873 | * Zero fill the rest of the data if necessary. |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 874 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 875 | if (cc < dataCount) |
| 876 | memset (data + cc, 0, dataCount - cc); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 877 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 878 | /* |
| 879 | * Write the buffer to the TAR file. |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 880 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 881 | writeTarBlock (data, dataCount); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 882 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 883 | fullDataCount -= dataCount; |
| 884 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 885 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 886 | /* |
| 887 | * Close the file. |
| 888 | */ |
| 889 | if ((tostdoutFlag == FALSE) && close (fileFd) < 0) |
| 890 | fprintf (stderr, "%s: close: %s\n", fileName, strerror (errno)); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 891 | } |
| 892 | |
| 893 | |
| 894 | /* |
| 895 | * Save a directory and all of its files to the tar file. |
| 896 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 897 | static void saveDirectory (const char *dirName, const struct stat *statbuf) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 898 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 899 | DIR *dir; |
| 900 | struct dirent *entry; |
| 901 | int needSlash; |
Eric Andersen | 1b61f41 | 1999-10-13 18:56:42 +0000 | [diff] [blame] | 902 | char fullName[NAME_MAX]; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 903 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 904 | /* |
| 905 | * Construct the directory name as used in the tar file by appending |
| 906 | * a slash character to it. |
| 907 | */ |
| 908 | strcpy (fullName, dirName); |
| 909 | strcat (fullName, "/"); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 910 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 911 | /* |
| 912 | * Write out the header for the directory entry. |
| 913 | */ |
| 914 | writeHeader (fullName, statbuf); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 915 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 916 | /* |
| 917 | * Open the directory. |
| 918 | */ |
| 919 | dir = opendir (dirName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 920 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 921 | if (dir == NULL) { |
| 922 | fprintf (stderr, "Cannot read directory \"%s\": %s\n", |
| 923 | dirName, strerror (errno)); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 924 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 925 | return; |
| 926 | } |
| 927 | |
| 928 | /* |
| 929 | * See if a slash is needed. |
| 930 | */ |
| 931 | needSlash = (*dirName && (dirName[strlen (dirName) - 1] != '/')); |
| 932 | |
| 933 | /* |
| 934 | * Read all of the directory entries and check them, |
| 935 | * except for the current and parent directory entries. |
| 936 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 937 | while (errorFlag==FALSE && ((entry = readdir (dir)) != NULL)) { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 938 | if ((strcmp (entry->d_name, ".") == 0) || |
| 939 | (strcmp (entry->d_name, "..") == 0)) { |
| 940 | continue; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 941 | } |
| 942 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 943 | /* |
| 944 | * Build the full path name to the file. |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 945 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 946 | strcpy (fullName, dirName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 947 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 948 | if (needSlash) |
| 949 | strcat (fullName, "/"); |
| 950 | |
| 951 | strcat (fullName, entry->d_name); |
| 952 | |
| 953 | /* |
| 954 | * Write this file to the tar file, noticing whether or not |
| 955 | * the file is a symbolic link. |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 956 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 957 | saveFile (fullName, TRUE); |
| 958 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 959 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 960 | /* |
| 961 | * All done, close the directory. |
| 962 | */ |
| 963 | closedir (dir); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | |
| 967 | /* |
| 968 | * Write a tar header for the specified file name and status. |
| 969 | * It is assumed that the file name fits. |
| 970 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 971 | static void writeHeader (const char *fileName, const struct stat *statbuf) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 972 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 973 | long checkSum; |
| 974 | const unsigned char *cp; |
| 975 | int len; |
| 976 | TarHeader header; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 977 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 978 | /* |
| 979 | * Zero the header block in preparation for filling it in. |
| 980 | */ |
| 981 | memset ((char *) &header, 0, sizeof (header)); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 982 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 983 | /* |
| 984 | * Fill in the header. |
| 985 | */ |
| 986 | strcpy (header.name, fileName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 987 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 988 | strncpy (header.magic, TAR_MAGIC, sizeof (header.magic)); |
| 989 | strncpy (header.version, TAR_VERSION, sizeof (header.version)); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 990 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 991 | putOctal (header.mode, sizeof (header.mode), statbuf->st_mode & 0777); |
| 992 | putOctal (header.uid, sizeof (header.uid), statbuf->st_uid); |
| 993 | putOctal (header.gid, sizeof (header.gid), statbuf->st_gid); |
| 994 | putOctal (header.size, sizeof (header.size), statbuf->st_size); |
| 995 | putOctal (header.mtime, sizeof (header.mtime), statbuf->st_mtime); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 996 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 997 | header.typeFlag = TAR_TYPE_REGULAR; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 998 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 999 | /* |
| 1000 | * Calculate and store the checksum. |
| 1001 | * This is the sum of all of the bytes of the header, |
| 1002 | * with the checksum field itself treated as blanks. |
| 1003 | */ |
| 1004 | memset (header.checkSum, ' ', sizeof (header.checkSum)); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1005 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1006 | cp = (const unsigned char *) &header; |
| 1007 | len = sizeof (header); |
| 1008 | checkSum = 0; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1009 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1010 | while (len-- > 0) |
| 1011 | checkSum += *cp++; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1012 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1013 | putOctal (header.checkSum, sizeof (header.checkSum), checkSum); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1014 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1015 | /* |
| 1016 | * Write the tar header. |
| 1017 | */ |
| 1018 | writeTarBlock ((const char *) &header, sizeof (header)); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1019 | } |
| 1020 | |
| 1021 | |
| 1022 | /* |
| 1023 | * Write data to one or more blocks of the tar file. |
| 1024 | * The data is always padded out to a multiple of TAR_BLOCK_SIZE. |
| 1025 | * The errorFlag static variable is set on an error. |
| 1026 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1027 | static void writeTarBlock (const char *buf, int len) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1028 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1029 | int partialLength; |
| 1030 | int completeLength; |
| 1031 | char fullBlock[TAR_BLOCK_SIZE]; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1032 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1033 | /* |
| 1034 | * If we had a write error before, then do nothing more. |
| 1035 | */ |
Eric Andersen | 5556c18 | 1999-11-10 19:27:58 +0000 | [diff] [blame] | 1036 | if (errorFlag==TRUE) |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1037 | return; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1038 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1039 | /* |
| 1040 | * Get the amount of complete and partial blocks. |
| 1041 | */ |
| 1042 | partialLength = len % TAR_BLOCK_SIZE; |
| 1043 | completeLength = len - partialLength; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1044 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1045 | /* |
| 1046 | * Write all of the complete blocks. |
| 1047 | */ |
| 1048 | if ((completeLength > 0) && !fullWrite (tarFd, buf, completeLength)) { |
| 1049 | perror (tarName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1050 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1051 | errorFlag = TRUE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1052 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1053 | return; |
| 1054 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1055 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1056 | /* |
| 1057 | * If there are no partial blocks left, we are done. |
| 1058 | */ |
| 1059 | if (partialLength == 0) |
| 1060 | return; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1061 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1062 | /* |
| 1063 | * Copy the partial data into a complete block, and pad the rest |
| 1064 | * of it with zeroes. |
| 1065 | */ |
| 1066 | memcpy (fullBlock, buf + completeLength, partialLength); |
| 1067 | memset (fullBlock + partialLength, 0, TAR_BLOCK_SIZE - partialLength); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1068 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1069 | /* |
| 1070 | * Write the last complete block. |
| 1071 | */ |
| 1072 | if (!fullWrite (tarFd, fullBlock, TAR_BLOCK_SIZE)) { |
| 1073 | perror (tarName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1074 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1075 | errorFlag = TRUE; |
| 1076 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1077 | } |
| 1078 | |
| 1079 | |
| 1080 | /* |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1081 | * Read an octal value in a field of the specified width, with optional |
| 1082 | * spaces on both sides of the number and with an optional null character |
| 1083 | * at the end. Returns -1 on an illegal format. |
| 1084 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1085 | static long getOctal (const char *cp, int len) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1086 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1087 | long val; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1088 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1089 | while ((len > 0) && (*cp == ' ')) { |
| 1090 | cp++; |
| 1091 | len--; |
| 1092 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1093 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1094 | if ((len == 0) || !isOctal (*cp)) |
| 1095 | return -1; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1096 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1097 | val = 0; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1098 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1099 | while ((len > 0) && isOctal (*cp)) { |
| 1100 | val = val * 8 + *cp++ - '0'; |
| 1101 | len--; |
| 1102 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1103 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1104 | while ((len > 0) && (*cp == ' ')) { |
| 1105 | cp++; |
| 1106 | len--; |
| 1107 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1108 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1109 | if ((len > 0) && *cp) |
| 1110 | return -1; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1111 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1112 | return val; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | |
| 1116 | /* |
| 1117 | * Put an octal string into the specified buffer. |
| 1118 | * The number is zero and space padded and possibly null padded. |
| 1119 | * Returns TRUE if successful. |
| 1120 | */ |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1121 | static int putOctal (char *cp, int len, long value) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1122 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1123 | int tempLength; |
| 1124 | char *tempString; |
| 1125 | char tempBuffer[32]; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1126 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1127 | /* |
| 1128 | * Create a string of the specified length with an initial space, |
| 1129 | * leading zeroes and the octal number, and a trailing null. |
| 1130 | */ |
| 1131 | tempString = tempBuffer; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1132 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1133 | sprintf (tempString, " %0*lo", len - 2, value); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1134 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1135 | tempLength = strlen (tempString) + 1; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1136 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1137 | /* |
| 1138 | * If the string is too large, suppress the leading space. |
| 1139 | */ |
| 1140 | if (tempLength > len) { |
| 1141 | tempLength--; |
| 1142 | tempString++; |
| 1143 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1144 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1145 | /* |
| 1146 | * If the string is still too large, suppress the trailing null. |
| 1147 | */ |
| 1148 | if (tempLength > len) |
| 1149 | tempLength--; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1150 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1151 | /* |
| 1152 | * If the string is still too large, fail. |
| 1153 | */ |
| 1154 | if (tempLength > len) |
| 1155 | return FALSE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1156 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1157 | /* |
| 1158 | * Copy the string to the field. |
| 1159 | */ |
| 1160 | memcpy (cp, tempString, len); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1161 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1162 | return TRUE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1163 | } |
| 1164 | |
| 1165 | |
| 1166 | /* |
| 1167 | * See if the specified file name belongs to one of the specified list |
| 1168 | * of path prefixes. An empty list implies that all files are wanted. |
| 1169 | * Returns TRUE if the file is selected. |
| 1170 | */ |
Eric Andersen | f811e07 | 1999-10-09 00:25:00 +0000 | [diff] [blame] | 1171 | static int |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1172 | wantFileName (const char *fileName, int fileCount, char **fileTable) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1173 | { |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1174 | const char *pathName; |
| 1175 | int fileLength; |
| 1176 | int pathLength; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1177 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1178 | /* |
| 1179 | * If there are no files in the list, then the file is wanted. |
| 1180 | */ |
| 1181 | if (fileCount == 0) |
| 1182 | return TRUE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1183 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1184 | fileLength = strlen (fileName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1185 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1186 | /* |
| 1187 | * Check each of the test paths. |
| 1188 | */ |
| 1189 | while (fileCount-- > 0) { |
| 1190 | pathName = *fileTable++; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1191 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1192 | pathLength = strlen (pathName); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1193 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1194 | if (fileLength < pathLength) |
| 1195 | continue; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1196 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1197 | if (memcmp (fileName, pathName, pathLength) != 0) |
| 1198 | continue; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1199 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1200 | if ((fileLength == pathLength) || (fileName[pathLength] == '/')) { |
| 1201 | return TRUE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1202 | } |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1203 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1204 | |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 1205 | return FALSE; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1206 | } |
| 1207 | |
| 1208 | |
| 1209 | |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1210 | /* END CODE */ |