1 /*- 2 * Copyright (c) 2003-2007 Tim Kientzle 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "bsdtar_platform.h" 27 28 #ifdef HAVE_SYS_TYPES_H 29 #include <sys/types.h> 30 #endif 31 #ifdef HAVE_SYS_PARAM_H 32 #include <sys/param.h> 33 #endif 34 #ifdef HAVE_SYS_STAT_H 35 #include <sys/stat.h> 36 #endif 37 38 #ifdef HAVE_ERRNO_H 39 #include <errno.h> 40 #endif 41 42 #ifdef HAVE_FCNTL_H 43 #include <fcntl.h> 44 #endif 45 46 #ifdef HAVE_GRP_H 47 #include <grp.h> 48 #endif 49 50 #ifdef HAVE_IO_H 51 #include <io.h> 52 #endif 53 54 #ifdef HAVE_LIMITS_H 55 #include <limits.h> 56 #endif 57 #ifdef HAVE_PWD_H 58 #include <pwd.h> 59 #endif 60 #ifdef HAVE_STDINT_H 61 #include <stdint.h> 62 #endif 63 #include <stdio.h> 64 #ifdef HAVE_STDLIB_H 65 #include <stdlib.h> 66 #endif 67 #ifdef HAVE_STRING_H 68 #include <string.h> 69 #endif 70 #ifdef HAVE_TIME_H 71 #include <time.h> 72 #endif 73 #ifdef HAVE_UNISTD_H 74 #include <unistd.h> 75 #endif 76 77 #include "bsdtar.h" 78 #include "err.h" 79 80 struct progress_data { 81 struct bsdtar *bsdtar; 82 struct archive *archive; 83 struct archive_entry *entry; 84 }; 85 86 static void read_archive(struct bsdtar *bsdtar, char mode, struct archive *); 87 static int unmatched_inclusions_warn(struct archive *matching, const char *); 88 89 90 void 91 tar_mode_t(struct bsdtar *bsdtar) 92 { 93 read_archive(bsdtar, 't', NULL); 94 if (unmatched_inclusions_warn(bsdtar->matching, 95 "Not found in archive") != 0) 96 bsdtar->return_value = 1; 97 } 98 99 void 100 tar_mode_x(struct bsdtar *bsdtar) 101 { 102 struct archive *writer; 103 104 writer = archive_write_disk_new(); 105 if (writer == NULL) 106 lafe_errc(1, ENOMEM, "Cannot allocate disk writer object"); 107 if ((bsdtar->flags & OPTFLAG_NUMERIC_OWNER) == 0) 108 archive_write_disk_set_standard_lookup(writer); 109 archive_write_disk_set_options(writer, bsdtar->extract_flags); 110 111 read_archive(bsdtar, 'x', writer); 112 113 if (unmatched_inclusions_warn(bsdtar->matching, 114 "Not found in archive") != 0) 115 bsdtar->return_value = 1; 116 archive_write_free(writer); 117 } 118 119 static void 120 progress_func(void *cookie) 121 { 122 struct progress_data *progress_data = (struct progress_data *)cookie; 123 struct bsdtar *bsdtar = progress_data->bsdtar; 124 struct archive *a = progress_data->archive; 125 struct archive_entry *entry = progress_data->entry; 126 uint64_t comp, uncomp; 127 int compression; 128 129 if (!need_report()) 130 return; 131 132 if (bsdtar->verbose) 133 fprintf(stderr, "\n"); 134 if (a != NULL) { 135 comp = archive_filter_bytes(a, -1); 136 uncomp = archive_filter_bytes(a, 0); 137 if (comp > uncomp) 138 compression = 0; 139 else 140 compression = (int)((uncomp - comp) * 100 / uncomp); 141 fprintf(stderr, 142 "In: %s bytes, compression %d%%;", 143 tar_i64toa(comp), compression); 144 fprintf(stderr, " Out: %d files, %s bytes\n", 145 archive_file_count(a), tar_i64toa(uncomp)); 146 } 147 if (entry != NULL) { 148 safe_fprintf(stderr, "Current: %s", 149 archive_entry_pathname(entry)); 150 fprintf(stderr, " (%s bytes)\n", 151 tar_i64toa(archive_entry_size(entry))); 152 } 153 } 154 155 /* 156 * Handle 'x' and 't' modes. 157 */ 158 static void 159 read_archive(struct bsdtar *bsdtar, char mode, struct archive *writer) 160 { 161 struct progress_data progress_data; 162 FILE *out; 163 struct archive *a; 164 struct archive_entry *entry; 165 const char *reader_options; 166 int r; 167 168 while (*bsdtar->argv) { 169 if (archive_match_include_pattern(bsdtar->matching, 170 *bsdtar->argv) != ARCHIVE_OK) 171 lafe_errc(1, 0, "Error inclusion pattern: %s", 172 archive_error_string(bsdtar->matching)); 173 bsdtar->argv++; 174 } 175 176 if (bsdtar->names_from_file != NULL) 177 if (archive_match_include_pattern_from_file( 178 bsdtar->matching, bsdtar->names_from_file, 179 (bsdtar->flags & OPTFLAG_NULL)) != ARCHIVE_OK) 180 lafe_errc(1, 0, "Error inclusion pattern: %s", 181 archive_error_string(bsdtar->matching)); 182 183 a = archive_read_new(); 184 if (cset_read_support_filter_program(bsdtar->cset, a) == 0) 185 archive_read_support_filter_all(a); 186 archive_read_support_format_all(a); 187 188 reader_options = getenv(ENV_READER_OPTIONS); 189 if (reader_options != NULL) { 190 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1; 191 size_t opt_len = strlen(reader_options) + 1; 192 char *p; 193 /* Set default read options. */ 194 if ((p = malloc(module_len + opt_len)) == NULL) 195 lafe_errc(1, errno, "Out of memory"); 196 /* Prepend magic code to ignore options for 197 * a format or modules which are not added to 198 * the archive read object. */ 199 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len); 200 memcpy(p + module_len, reader_options, opt_len); 201 r = archive_read_set_options(a, p); 202 free(p); 203 if (r == ARCHIVE_FATAL) 204 lafe_errc(1, 0, "%s", archive_error_string(a)); 205 else 206 archive_clear_error(a); 207 } 208 if (ARCHIVE_OK != archive_read_set_options(a, bsdtar->option_options)) 209 lafe_errc(1, 0, "%s", archive_error_string(a)); 210 if (bsdtar->flags & OPTFLAG_IGNORE_ZEROS) 211 if (archive_read_set_options(a, 212 "read_concatenated_archives") != ARCHIVE_OK) 213 lafe_errc(1, 0, "%s", archive_error_string(a)); 214 if (bsdtar->passphrase != NULL) 215 r = archive_read_add_passphrase(a, bsdtar->passphrase); 216 else 217 r = archive_read_set_passphrase_callback(a, bsdtar, 218 &passphrase_callback); 219 if (r != ARCHIVE_OK) 220 lafe_errc(1, 0, "%s", archive_error_string(a)); 221 if (archive_read_open_filename(a, bsdtar->filename, 222 bsdtar->bytes_per_block)) 223 lafe_errc(1, 0, "Error opening archive: %s", 224 archive_error_string(a)); 225 226 do_chdir(bsdtar); 227 228 if (mode == 'x') { 229 /* Set an extract callback so that we can handle SIGINFO. */ 230 progress_data.bsdtar = bsdtar; 231 progress_data.archive = a; 232 archive_read_extract_set_progress_callback(a, progress_func, 233 &progress_data); 234 } 235 236 if (mode == 'x' && (bsdtar->flags & OPTFLAG_CHROOT)) { 237 #if HAVE_CHROOT 238 if (chroot(".") != 0) 239 lafe_errc(1, errno, "Can't chroot to \".\""); 240 #else 241 lafe_errc(1, 0, 242 "chroot isn't supported on this platform"); 243 #endif 244 } 245 246 #if defined(_WIN32) && !defined(__CYGWIN__) 247 if (mode == 'x' && (bsdtar->flags & OPTFLAG_STDOUT)) { 248 _setmode(1, _O_BINARY); 249 } 250 #endif 251 252 for (;;) { 253 /* Support --fast-read option */ 254 const char *p; 255 if ((bsdtar->flags & OPTFLAG_FAST_READ) && 256 archive_match_path_unmatched_inclusions(bsdtar->matching) == 0) 257 break; 258 259 r = archive_read_next_header(a, &entry); 260 progress_data.entry = entry; 261 if (r == ARCHIVE_EOF) 262 break; 263 if (r < ARCHIVE_OK) 264 lafe_warnc(0, "%s", archive_error_string(a)); 265 if (r <= ARCHIVE_WARN) 266 bsdtar->return_value = 1; 267 if (r == ARCHIVE_RETRY) { 268 /* Retryable error: try again */ 269 lafe_warnc(0, "Retrying..."); 270 continue; 271 } 272 if (r == ARCHIVE_FATAL) 273 break; 274 p = archive_entry_pathname(entry); 275 if (p == NULL || p[0] == '\0') { 276 lafe_warnc(0, "Archive entry has empty or unreadable filename ... skipping."); 277 bsdtar->return_value = 1; 278 continue; 279 } 280 281 if (bsdtar->uid >= 0) { 282 archive_entry_set_uid(entry, bsdtar->uid); 283 archive_entry_set_uname(entry, NULL); 284 } 285 if (bsdtar->gid >= 0) { 286 archive_entry_set_gid(entry, bsdtar->gid); 287 archive_entry_set_gname(entry, NULL); 288 } 289 if (bsdtar->uname) 290 archive_entry_set_uname(entry, bsdtar->uname); 291 if (bsdtar->gname) 292 archive_entry_set_gname(entry, bsdtar->gname); 293 294 /* 295 * Note that pattern exclusions are checked before 296 * pathname rewrites are handled. This gives more 297 * control over exclusions, since rewrites always lose 298 * information. (For example, consider a rewrite 299 * s/foo[0-9]/foo/. If we check exclusions after the 300 * rewrite, there would be no way to exclude foo1/bar 301 * while allowing foo2/bar.) 302 */ 303 if (archive_match_excluded(bsdtar->matching, entry)) 304 continue; /* Excluded by a pattern test. */ 305 306 if (mode == 't') { 307 /* Perversely, gtar uses -O to mean "send to stderr" 308 * when used with -t. */ 309 out = (bsdtar->flags & OPTFLAG_STDOUT) ? 310 stderr : stdout; 311 312 /* 313 * TODO: Provide some reasonable way to 314 * preview rewrites. gtar always displays 315 * the unedited path in -t output, which means 316 * you cannot easily preview rewrites. 317 */ 318 if (bsdtar->verbose < 2) 319 safe_fprintf(out, "%s", 320 archive_entry_pathname(entry)); 321 else 322 list_item_verbose(bsdtar, out, entry); 323 fflush(out); 324 r = archive_read_data_skip(a); 325 if (r == ARCHIVE_WARN) { 326 fprintf(out, "\n"); 327 lafe_warnc(0, "%s", 328 archive_error_string(a)); 329 } 330 if (r == ARCHIVE_RETRY) { 331 fprintf(out, "\n"); 332 lafe_warnc(0, "%s", 333 archive_error_string(a)); 334 } 335 if (r == ARCHIVE_FATAL) { 336 fprintf(out, "\n"); 337 lafe_warnc(0, "%s", 338 archive_error_string(a)); 339 bsdtar->return_value = 1; 340 break; 341 } 342 fprintf(out, "\n"); 343 } else { 344 /* Note: some rewrite failures prevent extraction. */ 345 if (edit_pathname(bsdtar, entry)) 346 continue; /* Excluded by a rewrite failure. */ 347 348 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) && 349 !yes("extract '%s'", archive_entry_pathname(entry))) 350 continue; 351 352 if (bsdtar->verbose > 1) { 353 /* GNU tar uses -tv format with -xvv */ 354 safe_fprintf(stderr, "x "); 355 list_item_verbose(bsdtar, stderr, entry); 356 fflush(stderr); 357 } else if (bsdtar->verbose > 0) { 358 /* Format follows SUSv2, including the 359 * deferred '\n'. */ 360 safe_fprintf(stderr, "x %s", 361 archive_entry_pathname(entry)); 362 fflush(stderr); 363 } 364 365 /* TODO siginfo_printinfo(bsdtar, 0); */ 366 367 if (bsdtar->flags & OPTFLAG_STDOUT) 368 r = archive_read_data_into_fd(a, 1); 369 else 370 r = archive_read_extract2(a, entry, writer); 371 if (r != ARCHIVE_OK) { 372 if (!bsdtar->verbose) 373 safe_fprintf(stderr, "%s", archive_entry_pathname(entry)); 374 safe_fprintf(stderr, ": %s: %s", 375 archive_error_string(a), 376 strerror(archive_errno(a))); 377 if (!bsdtar->verbose) 378 fprintf(stderr, "\n"); 379 bsdtar->return_value = 1; 380 } 381 if (bsdtar->verbose) 382 fprintf(stderr, "\n"); 383 if (r == ARCHIVE_FATAL) 384 break; 385 } 386 } 387 388 389 r = archive_read_close(a); 390 if (r != ARCHIVE_OK) 391 lafe_warnc(0, "%s", archive_error_string(a)); 392 if (r <= ARCHIVE_WARN) 393 bsdtar->return_value = 1; 394 395 if (bsdtar->verbose > 2) 396 fprintf(stdout, "Archive Format: %s, Compression: %s\n", 397 archive_format_name(a), archive_filter_name(a, 0)); 398 399 archive_read_free(a); 400 } 401 402 403 static int 404 unmatched_inclusions_warn(struct archive *matching, const char *msg) 405 { 406 const char *p; 407 int r; 408 409 if (matching == NULL) 410 return (0); 411 412 while ((r = archive_match_path_unmatched_inclusions_next( 413 matching, &p)) == ARCHIVE_OK) 414 lafe_warnc(0, "%s: %s", p, msg); 415 if (r == ARCHIVE_FATAL) 416 lafe_errc(1, errno, "Out of memory"); 417 418 return (archive_match_path_unmatched_inclusions(matching)); 419 } 420