| 1 | // |
| 2 | // pkgutils |
| 3 | // |
| 4 | // Copyright (c) 2000-2005 Per Liden |
| 5 | // Copyright (c) 2006-2007 by CRUX team (http://crux.nu) |
| 6 | // |
| 7 | // This program is free software; you can redistribute it and/or modify |
| 8 | // it under the terms of the GNU General Public License as published by |
| 9 | // the Free Software Foundation; either version 2 of the License, or |
| 10 | // (at your option) any later version. |
| 11 | // |
| 12 | // This program is distributed in the hope that it will be useful, |
| 13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | // GNU General Public License for more details. |
| 16 | // |
| 17 | // You should have received a copy of the GNU General Public License |
| 18 | // along with this program; if not, write to the Free Software |
| 19 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 20 | // USA. |
| 21 | // |
| 22 | |
| 23 | #include "pkgutil.h" |
| 24 | #include <iostream> |
| 25 | #include <fstream> |
| 26 | #include <iterator> |
| 27 | #include <algorithm> |
| 28 | #include <cstdio> |
| 29 | #include <cstring> |
| 30 | #include <cerrno> |
| 31 | #include <csignal> |
| 32 | #include <ext/stdio_filebuf.h> |
| 33 | #include <pwd.h> |
| 34 | #include <grp.h> |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/stat.h> |
| 37 | #include <sys/wait.h> |
| 38 | #include <sys/file.h> |
| 39 | #include <sys/param.h> |
| 40 | #include <unistd.h> |
| 41 | #include <fcntl.h> |
| 42 | #include <libgen.h> |
| 43 | #include <archive.h> |
| 44 | #include <archive_entry.h> |
| 45 | |
| 46 | #define INIT_ARCHIVE(ar) \ |
| 47 | archive_read_support_compression_gzip((ar)); \ |
| 48 | archive_read_support_format_tar((ar)) |
| 49 | |
| 50 | using __gnu_cxx::stdio_filebuf; |
| 51 | |
| 52 | pkgutil::pkgutil(const string& name) |
| 53 | : utilname(name) |
| 54 | { |
| 55 | // Ignore signals |
| 56 | struct sigaction sa; |
| 57 | memset(&sa, 0, sizeof(sa)); |
| 58 | sa.sa_handler = SIG_IGN; |
| 59 | sigaction(SIGHUP, &sa, 0); |
| 60 | sigaction(SIGINT, &sa, 0); |
| 61 | sigaction(SIGQUIT, &sa, 0); |
| 62 | sigaction(SIGTERM, &sa, 0); |
| 63 | } |
| 64 | |
| 65 | void pkgutil::db_open(const string& path) |
| 66 | { |
| 67 | // Read database |
| 68 | root = trim_filename(path + "/"); |
| 69 | const string filename = root + PKG_DB; |
| 70 | |
| 71 | int fd = open(filename.c_str(), O_RDONLY); |
| 72 | if (fd == -1) |
| 73 | throw runtime_error_with_errno("could not open " + filename); |
| 74 | |
| 75 | stdio_filebuf<char> filebuf(fd, ios::in, getpagesize()); |
| 76 | istream in(&filebuf); |
| 77 | if (!in) |
| 78 | throw runtime_error_with_errno("could not read " + filename); |
| 79 | |
| 80 | while (!in.eof()) { |
| 81 | // Read record |
| 82 | string name; |
| 83 | pkginfo_t info; |
| 84 | getline(in, name); |
| 85 | getline(in, info.version); |
| 86 | for (;;) { |
| 87 | string file; |
| 88 | getline(in, file); |
| 89 | |
| 90 | if (file.empty()) |
| 91 | break; // End of record |
| 92 | |
| 93 | info.files.insert(info.files.end(), file); |
| 94 | } |
| 95 | if (!info.files.empty()) |
| 96 | packages[name] = info; |
| 97 | } |
| 98 | |
| 99 | #ifndef NDEBUG |
| 100 | cerr << packages.size() << " packages found in database" << endl; |
| 101 | #endif |
| 102 | } |
| 103 | |
| 104 | void pkgutil::db_commit() |
| 105 | { |
| 106 | const string dbfilename = root + PKG_DB; |
| 107 | const string dbfilename_new = dbfilename + ".incomplete_transaction"; |
| 108 | const string dbfilename_bak = dbfilename + ".backup"; |
| 109 | |
| 110 | // Remove failed transaction (if it exists) |
| 111 | if (unlink(dbfilename_new.c_str()) == -1 && errno != ENOENT) |
| 112 | throw runtime_error_with_errno("could not remove " + dbfilename_new); |
| 113 | |
| 114 | // Write new database |
| 115 | int fd_new = creat(dbfilename_new.c_str(), 0444); |
| 116 | if (fd_new == -1) |
| 117 | throw runtime_error_with_errno("could not create " + dbfilename_new); |
| 118 | |
| 119 | stdio_filebuf<char> filebuf_new(fd_new, ios::out, getpagesize()); |
| 120 | ostream db_new(&filebuf_new); |
| 121 | for (packages_t::const_iterator i = packages.begin(); i != packages.end(); ++i) { |
| 122 | if (!i->second.files.empty()) { |
| 123 | db_new << i->first << "\n"; |
| 124 | db_new << i->second.version << "\n"; |
| 125 | copy(i->second.files.begin(), i->second.files.end(), ostream_iterator<string>(db_new, "\n")); |
| 126 | db_new << "\n"; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | db_new.flush(); |
| 131 | |
| 132 | // Make sure the new database was successfully written |
| 133 | if (!db_new) |
| 134 | throw runtime_error("could not write " + dbfilename_new); |
| 135 | |
| 136 | // Synchronize file to disk |
| 137 | if (fsync(fd_new) == -1) |
| 138 | throw runtime_error_with_errno("could not synchronize " + dbfilename_new); |
| 139 | |
| 140 | // Relink database backup |
| 141 | if (unlink(dbfilename_bak.c_str()) == -1 && errno != ENOENT) |
| 142 | throw runtime_error_with_errno("could not remove " + dbfilename_bak); |
| 143 | if (link(dbfilename.c_str(), dbfilename_bak.c_str()) == -1) |
| 144 | throw runtime_error_with_errno("could not create " + dbfilename_bak); |
| 145 | |
| 146 | // Move new database into place |
| 147 | if (rename(dbfilename_new.c_str(), dbfilename.c_str()) == -1) |
| 148 | throw runtime_error_with_errno("could not rename " + dbfilename_new + " to " + dbfilename); |
| 149 | |
| 150 | #ifndef NDEBUG |
| 151 | cerr << packages.size() << " packages written to database" << endl; |
| 152 | #endif |
| 153 | } |
| 154 | |
| 155 | void pkgutil::db_add_pkg(const string& name, const pkginfo_t& info) |
| 156 | { |
| 157 | packages[name] = info; |
| 158 | } |
| 159 | |
| 160 | bool pkgutil::db_find_pkg(const string& name) |
| 161 | { |
| 162 | return (packages.find(name) != packages.end()); |
| 163 | } |
| 164 | |
| 165 | void pkgutil::db_rm_pkg(const string& name) |
| 166 | { |
| 167 | set<string> files = packages[name].files; |
| 168 | packages.erase(name); |
| 169 | |
| 170 | #ifndef NDEBUG |
| 171 | cerr << "Removing package phase 1 (all files in package):" << endl; |
| 172 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 173 | cerr << endl; |
| 174 | #endif |
| 175 | |
| 176 | // Don't delete files that still have references |
| 177 | for (packages_t::const_iterator i = packages.begin(); i != packages.end(); ++i) |
| 178 | for (set<string>::const_iterator j = i->second.files.begin(); j != i->second.files.end(); ++j) |
| 179 | files.erase(*j); |
| 180 | |
| 181 | #ifndef NDEBUG |
| 182 | cerr << "Removing package phase 2 (files that still have references excluded):" << endl; |
| 183 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 184 | cerr << endl; |
| 185 | #endif |
| 186 | |
| 187 | // Delete the files |
| 188 | for (set<string>::const_reverse_iterator i = files.rbegin(); i != files.rend(); ++i) { |
| 189 | const string filename = root + *i; |
| 190 | if (file_exists(filename) && remove(filename.c_str()) == -1) { |
| 191 | const char* msg = strerror(errno); |
| 192 | cerr << utilname << ": could not remove " << filename << ": " << msg << endl; |
| 193 | } |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | void pkgutil::db_rm_pkg(const string& name, const set<string>& keep_list) |
| 198 | { |
| 199 | set<string> files = packages[name].files; |
| 200 | packages.erase(name); |
| 201 | |
| 202 | #ifndef NDEBUG |
| 203 | cerr << "Removing package phase 1 (all files in package):" << endl; |
| 204 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 205 | cerr << endl; |
| 206 | #endif |
| 207 | |
| 208 | // Don't delete files found in the keep list |
| 209 | for (set<string>::const_iterator i = keep_list.begin(); i != keep_list.end(); ++i) |
| 210 | files.erase(*i); |
| 211 | |
| 212 | #ifndef NDEBUG |
| 213 | cerr << "Removing package phase 2 (files that is in the keep list excluded):" << endl; |
| 214 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 215 | cerr << endl; |
| 216 | #endif |
| 217 | |
| 218 | // Don't delete files that still have references |
| 219 | for (packages_t::const_iterator i = packages.begin(); i != packages.end(); ++i) |
| 220 | for (set<string>::const_iterator j = i->second.files.begin(); j != i->second.files.end(); ++j) |
| 221 | files.erase(*j); |
| 222 | |
| 223 | #ifndef NDEBUG |
| 224 | cerr << "Removing package phase 3 (files that still have references excluded):" << endl; |
| 225 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 226 | cerr << endl; |
| 227 | #endif |
| 228 | |
| 229 | // Delete the files |
| 230 | for (set<string>::const_reverse_iterator i = files.rbegin(); i != files.rend(); ++i) { |
| 231 | const string filename = root + *i; |
| 232 | if (file_exists(filename) && remove(filename.c_str()) == -1) { |
| 233 | if (errno == ENOTEMPTY) |
| 234 | continue; |
| 235 | const char* msg = strerror(errno); |
| 236 | cerr << utilname << ": could not remove " << filename << ": " << msg << endl; |
| 237 | } |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | void pkgutil::db_rm_files(set<string> files, const set<string>& keep_list) |
| 242 | { |
| 243 | // Remove all references |
| 244 | for (packages_t::iterator i = packages.begin(); i != packages.end(); ++i) |
| 245 | for (set<string>::const_iterator j = files.begin(); j != files.end(); ++j) |
| 246 | i->second.files.erase(*j); |
| 247 | |
| 248 | #ifndef NDEBUG |
| 249 | cerr << "Removing files:" << endl; |
| 250 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 251 | cerr << endl; |
| 252 | #endif |
| 253 | |
| 254 | // Don't delete files found in the keep list |
| 255 | for (set<string>::const_iterator i = keep_list.begin(); i != keep_list.end(); ++i) |
| 256 | files.erase(*i); |
| 257 | |
| 258 | // Delete the files |
| 259 | for (set<string>::const_reverse_iterator i = files.rbegin(); i != files.rend(); ++i) { |
| 260 | const string filename = root + *i; |
| 261 | if (file_exists(filename) && remove(filename.c_str()) == -1) { |
| 262 | if (errno == ENOTEMPTY) |
| 263 | continue; |
| 264 | const char* msg = strerror(errno); |
| 265 | cerr << utilname << ": could not remove " << filename << ": " << msg << endl; |
| 266 | } |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | set<string> pkgutil::db_find_conflicts(const string& name, const pkginfo_t& info) |
| 271 | { |
| 272 | set<string> files; |
| 273 | |
| 274 | // Find conflicting files in database |
| 275 | for (packages_t::const_iterator i = packages.begin(); i != packages.end(); ++i) { |
| 276 | if (i->first != name) { |
| 277 | set_intersection(info.files.begin(), info.files.end(), |
| 278 | i->second.files.begin(), i->second.files.end(), |
| 279 | inserter(files, files.end())); |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | #ifndef NDEBUG |
| 284 | cerr << "Conflicts phase 1 (conflicts in database):" << endl; |
| 285 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 286 | cerr << endl; |
| 287 | #endif |
| 288 | |
| 289 | // Find conflicting files in filesystem |
| 290 | for (set<string>::iterator i = info.files.begin(); i != info.files.end(); ++i) { |
| 291 | const string filename = root + *i; |
| 292 | if (file_exists(filename) && files.find(*i) == files.end()) |
| 293 | files.insert(files.end(), *i); |
| 294 | } |
| 295 | |
| 296 | #ifndef NDEBUG |
| 297 | cerr << "Conflicts phase 2 (conflicts in filesystem added):" << endl; |
| 298 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 299 | cerr << endl; |
| 300 | #endif |
| 301 | |
| 302 | // Exclude directories |
| 303 | set<string> tmp = files; |
| 304 | for (set<string>::const_iterator i = tmp.begin(); i != tmp.end(); ++i) { |
| 305 | if ((*i)[i->length() - 1] == '/') |
| 306 | files.erase(*i); |
| 307 | } |
| 308 | |
| 309 | #ifndef NDEBUG |
| 310 | cerr << "Conflicts phase 3 (directories excluded):" << endl; |
| 311 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 312 | cerr << endl; |
| 313 | #endif |
| 314 | |
| 315 | // If this is an upgrade, remove files already owned by this package |
| 316 | if (packages.find(name) != packages.end()) { |
| 317 | for (set<string>::const_iterator i = packages[name].files.begin(); i != packages[name].files.end(); ++i) |
| 318 | files.erase(*i); |
| 319 | |
| 320 | #ifndef NDEBUG |
| 321 | cerr << "Conflicts phase 4 (files already owned by this package excluded):" << endl; |
| 322 | copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n")); |
| 323 | cerr << endl; |
| 324 | #endif |
| 325 | } |
| 326 | |
| 327 | return files; |
| 328 | } |
| 329 | |
| 330 | pair<string, pkgutil::pkginfo_t> pkgutil::pkg_open(const string& filename) const |
| 331 | { |
| 332 | pair<string, pkginfo_t> result; |
| 333 | unsigned int i; |
| 334 | struct archive* archive; |
| 335 | struct archive_entry* entry; |
| 336 | |
| 337 | // Extract name and version from filename |
| 338 | string basename(filename, filename.rfind('/') + 1); |
| 339 | string name(basename, 0, basename.find(VERSION_DELIM)); |
| 340 | string version(basename, 0, basename.rfind(PKG_EXT)); |
| 341 | version.erase(0, version.find(VERSION_DELIM) == string::npos ? string::npos : version.find(VERSION_DELIM) + 1); |
| 342 | |
| 343 | if (name.empty() || version.empty()) |
| 344 | throw runtime_error("could not determine name and/or version of " + basename + ": Invalid package name"); |
| 345 | |
| 346 | result.first = name; |
| 347 | result.second.version = version; |
| 348 | |
| 349 | archive = archive_read_new(); |
| 350 | INIT_ARCHIVE(archive); |
| 351 | |
| 352 | if (archive_read_open_filename(archive, |
| 353 | const_cast<char*>(filename.c_str()), |
| 354 | ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) |
| 355 | throw runtime_error_with_errno("could not open " + filename, archive_errno(archive)); |
| 356 | |
| 357 | for (i = 0; archive_read_next_header(archive, &entry) == |
| 358 | ARCHIVE_OK; ++i) { |
| 359 | |
| 360 | result.second.files.insert(result.second.files.end(), |
| 361 | archive_entry_pathname(entry)); |
| 362 | |
| 363 | mode_t mode = archive_entry_mode(entry); |
| 364 | |
| 365 | if (S_ISREG(mode) && |
| 366 | archive_read_data_skip(archive) != ARCHIVE_OK) |
| 367 | throw runtime_error_with_errno("could not read " + filename, archive_errno(archive)); |
| 368 | } |
| 369 | |
| 370 | if (i == 0) { |
| 371 | if (archive_errno(archive) == 0) |
| 372 | throw runtime_error("empty package"); |
| 373 | else |
| 374 | throw runtime_error("could not read " + filename); |
| 375 | } |
| 376 | |
| 377 | archive_read_finish(archive); |
| 378 | |
| 379 | return result; |
| 380 | } |
| 381 | |
| 382 | void pkgutil::pkg_install(const string& filename, const set<string>& keep_list, const set<string>& non_install_list) const |
| 383 | { |
| 384 | struct archive* archive; |
| 385 | struct archive_entry* entry; |
| 386 | unsigned int i; |
| 387 | char buf[PATH_MAX]; |
| 388 | string absroot; |
| 389 | |
| 390 | archive = archive_read_new(); |
| 391 | INIT_ARCHIVE(archive); |
| 392 | |
| 393 | if (archive_read_open_filename(archive, |
| 394 | const_cast<char*>(filename.c_str()), |
| 395 | ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) |
| 396 | throw runtime_error_with_errno("could not open " + filename, archive_errno(archive)); |
| 397 | |
| 398 | chdir(root.c_str()); |
| 399 | absroot = getcwd(buf, sizeof(buf)); |
| 400 | |
| 401 | for (i = 0; archive_read_next_header(archive, &entry) == |
| 402 | ARCHIVE_OK; ++i) { |
| 403 | string archive_filename = archive_entry_pathname(entry); |
| 404 | string reject_dir = trim_filename(absroot + string("/") + string(PKG_REJECTED)); |
| 405 | string original_filename = trim_filename(absroot + string("/") + archive_filename); |
| 406 | string real_filename = original_filename; |
| 407 | |
| 408 | // Check if file is filtered out via INSTALL |
| 409 | if (non_install_list.find(archive_filename) != non_install_list.end()) { |
| 410 | mode_t mode; |
| 411 | |
| 412 | cout << utilname << ": ignoring " << archive_filename << endl; |
| 413 | |
| 414 | mode = archive_entry_mode(entry); |
| 415 | |
| 416 | if (S_ISREG(mode)) |
| 417 | archive_read_data_skip(archive); |
| 418 | |
| 419 | continue; |
| 420 | } |
| 421 | |
| 422 | // Check if file should be rejected |
| 423 | if (file_exists(real_filename) && keep_list.find(archive_filename) != keep_list.end()) |
| 424 | real_filename = trim_filename(reject_dir + string("/") + archive_filename); |
| 425 | |
| 426 | archive_entry_set_pathname(entry, const_cast<char*> |
| 427 | (real_filename.c_str())); |
| 428 | |
| 429 | // Extract file |
| 430 | unsigned int flags = ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_UNLINK; |
| 431 | |
| 432 | if (archive_read_extract(archive, entry, flags) != ARCHIVE_OK) { |
| 433 | // If a file fails to install we just print an error message and |
| 434 | // continue trying to install the rest of the package. |
| 435 | const char* msg = archive_error_string(archive); |
| 436 | cerr << utilname << ": could not install " + archive_filename << ": " << msg << endl; |
| 437 | continue; |
| 438 | } |
| 439 | |
| 440 | // Check rejected file |
| 441 | if (real_filename != original_filename) { |
| 442 | bool remove_file = false; |
| 443 | mode_t mode = archive_entry_mode(entry); |
| 444 | |
| 445 | // Directory |
| 446 | if (S_ISDIR(mode)) |
| 447 | remove_file = permissions_equal(real_filename, original_filename); |
| 448 | // Other files |
| 449 | else |
| 450 | remove_file = permissions_equal(real_filename, original_filename) && |
| 451 | (file_empty(real_filename) || file_equal(real_filename, original_filename)); |
| 452 | |
| 453 | // Remove rejected file or signal about its existence |
| 454 | if (remove_file) |
| 455 | file_remove(reject_dir, real_filename); |
| 456 | else |
| 457 | cout << utilname << ": rejecting " << archive_filename << ", keeping existing version" << endl; |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | if (i == 0) { |
| 462 | if (archive_errno(archive) == 0) |
| 463 | throw runtime_error("empty package"); |
| 464 | else |
| 465 | throw runtime_error("could not read " + filename); |
| 466 | } |
| 467 | |
| 468 | archive_read_finish(archive); |
| 469 | } |
| 470 | |
| 471 | void pkgutil::ldconfig() const |
| 472 | { |
| 473 | // Only execute ldconfig if /etc/ld.so.conf exists |
| 474 | if (file_exists(root + LDCONFIG_CONF)) { |
| 475 | pid_t pid = fork(); |
| 476 | |
| 477 | if (pid == -1) |
| 478 | throw runtime_error_with_errno("fork() failed"); |
| 479 | |
| 480 | if (pid == 0) { |
| 481 | execl(LDCONFIG, LDCONFIG, "-r", root.c_str(), (char *) 0); |
| 482 | const char* msg = strerror(errno); |
| 483 | cerr << utilname << ": could not execute " << LDCONFIG << ": " << msg << endl; |
| 484 | exit(EXIT_FAILURE); |
| 485 | } else { |
| 486 | if (waitpid(pid, 0, 0) == -1) |
| 487 | throw runtime_error_with_errno("waitpid() failed"); |
| 488 | } |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | void pkgutil::pkg_footprint(string& filename) const |
| 493 | { |
| 494 | unsigned int i; |
| 495 | struct archive* archive; |
| 496 | struct archive_entry* entry; |
| 497 | |
| 498 | map<string, mode_t> hardlink_target_modes; |
| 499 | |
| 500 | // We first do a run over the archive and remember the modes |
| 501 | // of regular files. |
| 502 | // In the second run, we print the footprint - using the stored |
| 503 | // modes for hardlinks. |
| 504 | // |
| 505 | // FIXME the code duplication here is butt ugly |
| 506 | archive = archive_read_new(); |
| 507 | INIT_ARCHIVE(archive); |
| 508 | |
| 509 | if (archive_read_open_filename(archive, |
| 510 | const_cast<char*>(filename.c_str()), |
| 511 | ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) |
| 512 | throw runtime_error_with_errno("could not open " + filename, archive_errno(archive)); |
| 513 | |
| 514 | for (i = 0; archive_read_next_header(archive, &entry) == |
| 515 | ARCHIVE_OK; ++i) { |
| 516 | |
| 517 | mode_t mode = archive_entry_mode(entry); |
| 518 | |
| 519 | if (!archive_entry_hardlink(entry)) { |
| 520 | const char *s = archive_entry_pathname(entry); |
| 521 | |
| 522 | hardlink_target_modes[s] = mode; |
| 523 | } |
| 524 | |
| 525 | if (S_ISREG(mode) && archive_read_data_skip(archive)) |
| 526 | throw runtime_error_with_errno("could not read " + filename, archive_errno(archive)); |
| 527 | } |
| 528 | |
| 529 | archive_read_finish(archive); |
| 530 | |
| 531 | // Too bad, there doesn't seem to be a way to reuse our archive |
| 532 | // instance |
| 533 | archive = archive_read_new(); |
| 534 | INIT_ARCHIVE(archive); |
| 535 | |
| 536 | if (archive_read_open_filename(archive, |
| 537 | const_cast<char*>(filename.c_str()), |
| 538 | ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) |
| 539 | throw runtime_error_with_errno("could not open " + filename, archive_errno(archive)); |
| 540 | |
| 541 | for (i = 0; archive_read_next_header(archive, &entry) == |
| 542 | ARCHIVE_OK; ++i) { |
| 543 | mode_t mode = archive_entry_mode(entry); |
| 544 | |
| 545 | // Access permissions |
| 546 | if (S_ISLNK(mode)) { |
| 547 | // Access permissions on symlinks differ among filesystems, e.g. XFS and ext2 have different. |
| 548 | // To avoid getting different footprints we always use "lrwxrwxrwx". |
| 549 | cout << "lrwxrwxrwx"; |
| 550 | } else { |
| 551 | const char *h = archive_entry_hardlink(entry); |
| 552 | |
| 553 | if (h) |
| 554 | cout << mtos(hardlink_target_modes[h]); |
| 555 | else |
| 556 | cout << mtos(mode); |
| 557 | } |
| 558 | |
| 559 | cout << '\t'; |
| 560 | |
| 561 | // User |
| 562 | uid_t uid = archive_entry_uid(entry); |
| 563 | struct passwd* pw = getpwuid(uid); |
| 564 | if (pw) |
| 565 | cout << pw->pw_name; |
| 566 | else |
| 567 | cout << uid; |
| 568 | |
| 569 | cout << '/'; |
| 570 | |
| 571 | // Group |
| 572 | gid_t gid = archive_entry_gid(entry); |
| 573 | struct group* gr = getgrgid(gid); |
| 574 | if (gr) |
| 575 | cout << gr->gr_name; |
| 576 | else |
| 577 | cout << gid; |
| 578 | |
| 579 | // Filename |
| 580 | cout << '\t' << archive_entry_pathname(entry); |
| 581 | |
| 582 | // Special cases |
| 583 | if (S_ISLNK(mode)) { |
| 584 | // Symlink |
| 585 | cout << " -> " << archive_entry_symlink(entry); |
| 586 | } else if (S_ISCHR(mode) || |
| 587 | S_ISBLK(mode)) { |
| 588 | // Device |
| 589 | cout << " (" << archive_entry_rdevmajor(entry) |
| 590 | << ", " << archive_entry_rdevminor(entry) |
| 591 | << ")"; |
| 592 | } else if (S_ISREG(mode) && |
| 593 | archive_entry_size(entry) == 0) { |
| 594 | // Empty regular file |
| 595 | cout << " (EMPTY)"; |
| 596 | } |
| 597 | |
| 598 | cout << '\n'; |
| 599 | |
| 600 | if (S_ISREG(mode) && archive_read_data_skip(archive)) |
| 601 | throw runtime_error_with_errno("could not read " + filename, archive_errno(archive)); |
| 602 | } |
| 603 | |
| 604 | if (i == 0) { |
| 605 | if (archive_errno(archive) == 0) |
| 606 | throw runtime_error("empty package"); |
| 607 | else |
| 608 | throw runtime_error("could not read " + filename); |
| 609 | } |
| 610 | |
| 611 | archive_read_finish(archive); |
| 612 | } |
| 613 | |
| 614 | void pkgutil::print_version() const |
| 615 | { |
| 616 | cout << utilname << " (pkgutils) " << VERSION << endl; |
| 617 | } |
| 618 | |
| 619 | db_lock::db_lock(const string& root, bool exclusive) |
| 620 | : dir(0) |
| 621 | { |
| 622 | const string dirname = trim_filename(root + string("/") + PKG_DIR); |
| 623 | |
| 624 | if (!(dir = opendir(dirname.c_str()))) |
| 625 | throw runtime_error_with_errno("could not read directory " + dirname); |
| 626 | |
| 627 | if (flock(dirfd(dir), (exclusive ? LOCK_EX : LOCK_SH) | LOCK_NB) == -1) { |
| 628 | if (errno == EWOULDBLOCK) |
| 629 | throw runtime_error("package database is currently locked by another process"); |
| 630 | else |
| 631 | throw runtime_error_with_errno("could not lock directory " + dirname); |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | db_lock::~db_lock() |
| 636 | { |
| 637 | if (dir) { |
| 638 | flock(dirfd(dir), LOCK_UN); |
| 639 | closedir(dir); |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | void assert_argument(char** argv, int argc, int index) |
| 644 | { |
| 645 | if (argc - 1 < index + 1) |
| 646 | throw runtime_error("option " + string(argv[index]) + " requires an argument"); |
| 647 | } |
| 648 | |
| 649 | string itos(unsigned int value) |
| 650 | { |
| 651 | static char buf[20]; |
| 652 | sprintf(buf, "%u", value); |
| 653 | return buf; |
| 654 | } |
| 655 | |
| 656 | string mtos(mode_t mode) |
| 657 | { |
| 658 | string s; |
| 659 | |
| 660 | // File type |
| 661 | switch (mode & S_IFMT) { |
| 662 | case S_IFREG: s += '-'; break; // Regular |
| 663 | case S_IFDIR: s += 'd'; break; // Directory |
| 664 | case S_IFLNK: s += 'l'; break; // Symbolic link |
| 665 | case S_IFCHR: s += 'c'; break; // Character special |
| 666 | case S_IFBLK: s += 'b'; break; // Block special |
| 667 | case S_IFSOCK: s += 's'; break; // Socket |
| 668 | case S_IFIFO: s += 'p'; break; // Fifo |
| 669 | default: s += '?'; break; // Unknown |
| 670 | } |
| 671 | |
| 672 | // User permissions |
| 673 | s += (mode & S_IRUSR) ? 'r' : '-'; |
| 674 | s += (mode & S_IWUSR) ? 'w' : '-'; |
| 675 | switch (mode & (S_IXUSR | S_ISUID)) { |
| 676 | case S_IXUSR: s += 'x'; break; |
| 677 | case S_ISUID: s += 'S'; break; |
| 678 | case S_IXUSR | S_ISUID: s += 's'; break; |
| 679 | default: s += '-'; break; |
| 680 | } |
| 681 | |
| 682 | // Group permissions |
| 683 | s += (mode & S_IRGRP) ? 'r' : '-'; |
| 684 | s += (mode & S_IWGRP) ? 'w' : '-'; |
| 685 | switch (mode & (S_IXGRP | S_ISGID)) { |
| 686 | case S_IXGRP: s += 'x'; break; |
| 687 | case S_ISGID: s += 'S'; break; |
| 688 | case S_IXGRP | S_ISGID: s += 's'; break; |
| 689 | default: s += '-'; break; |
| 690 | } |
| 691 | |
| 692 | // Other permissions |
| 693 | s += (mode & S_IROTH) ? 'r' : '-'; |
| 694 | s += (mode & S_IWOTH) ? 'w' : '-'; |
| 695 | switch (mode & (S_IXOTH | S_ISVTX)) { |
| 696 | case S_IXOTH: s += 'x'; break; |
| 697 | case S_ISVTX: s += 'T'; break; |
| 698 | case S_IXOTH | S_ISVTX: s += 't'; break; |
| 699 | default: s += '-'; break; |
| 700 | } |
| 701 | |
| 702 | return s; |
| 703 | } |
| 704 | |
| 705 | string trim_filename(const string& filename) |
| 706 | { |
| 707 | string search("//"); |
| 708 | string result = filename; |
| 709 | |
| 710 | for (string::size_type pos = result.find(search); pos != string::npos; pos = result.find(search)) |
| 711 | result.replace(pos, search.size(), "/"); |
| 712 | |
| 713 | return result; |
| 714 | } |
| 715 | |
| 716 | bool file_exists(const string& filename) |
| 717 | { |
| 718 | struct stat buf; |
| 719 | return !lstat(filename.c_str(), &buf); |
| 720 | } |
| 721 | |
| 722 | bool file_empty(const string& filename) |
| 723 | { |
| 724 | struct stat buf; |
| 725 | |
| 726 | if (lstat(filename.c_str(), &buf) == -1) |
| 727 | return false; |
| 728 | |
| 729 | return (S_ISREG(buf.st_mode) && buf.st_size == 0); |
| 730 | } |
| 731 | |
| 732 | bool file_equal(const string& file1, const string& file2) |
| 733 | { |
| 734 | struct stat buf1, buf2; |
| 735 | |
| 736 | if (lstat(file1.c_str(), &buf1) == -1) |
| 737 | return false; |
| 738 | |
| 739 | if (lstat(file2.c_str(), &buf2) == -1) |
| 740 | return false; |
| 741 | |
| 742 | // Regular files |
| 743 | if (S_ISREG(buf1.st_mode) && S_ISREG(buf2.st_mode)) { |
| 744 | ifstream f1(file1.c_str()); |
| 745 | ifstream f2(file2.c_str()); |
| 746 | |
| 747 | if (!f1 || !f2) |
| 748 | return false; |
| 749 | |
| 750 | while (!f1.eof()) { |
| 751 | char buffer1[4096]; |
| 752 | char buffer2[4096]; |
| 753 | f1.read(buffer1, 4096); |
| 754 | f2.read(buffer2, 4096); |
| 755 | if (f1.gcount() != f2.gcount() || |
| 756 | memcmp(buffer1, buffer2, f1.gcount()) || |
| 757 | f1.eof() != f2.eof()) |
| 758 | return false; |
| 759 | } |
| 760 | |
| 761 | return true; |
| 762 | } |
| 763 | // Symlinks |
| 764 | else if (S_ISLNK(buf1.st_mode) && S_ISLNK(buf2.st_mode)) { |
| 765 | char symlink1[MAXPATHLEN]; |
| 766 | char symlink2[MAXPATHLEN]; |
| 767 | |
| 768 | memset(symlink1, 0, MAXPATHLEN); |
| 769 | memset(symlink2, 0, MAXPATHLEN); |
| 770 | |
| 771 | if (readlink(file1.c_str(), symlink1, MAXPATHLEN - 1) == -1) |
| 772 | return false; |
| 773 | |
| 774 | if (readlink(file2.c_str(), symlink2, MAXPATHLEN - 1) == -1) |
| 775 | return false; |
| 776 | |
| 777 | return !strncmp(symlink1, symlink2, MAXPATHLEN); |
| 778 | } |
| 779 | // Character devices |
| 780 | else if (S_ISCHR(buf1.st_mode) && S_ISCHR(buf2.st_mode)) { |
| 781 | return buf1.st_dev == buf2.st_dev; |
| 782 | } |
| 783 | // Block devices |
| 784 | else if (S_ISBLK(buf1.st_mode) && S_ISBLK(buf2.st_mode)) { |
| 785 | return buf1.st_dev == buf2.st_dev; |
| 786 | } |
| 787 | |
| 788 | return false; |
| 789 | } |
| 790 | |
| 791 | bool permissions_equal(const string& file1, const string& file2) |
| 792 | { |
| 793 | struct stat buf1; |
| 794 | struct stat buf2; |
| 795 | |
| 796 | if (lstat(file1.c_str(), &buf1) == -1) |
| 797 | return false; |
| 798 | |
| 799 | if (lstat(file2.c_str(), &buf2) == -1) |
| 800 | return false; |
| 801 | |
| 802 | return(buf1.st_mode == buf2.st_mode) && |
| 803 | (buf1.st_uid == buf2.st_uid) && |
| 804 | (buf1.st_gid == buf2.st_gid); |
| 805 | } |
| 806 | |
| 807 | void file_remove(const string& basedir, const string& filename) |
| 808 | { |
| 809 | if (filename != basedir && !remove(filename.c_str())) { |
| 810 | char* path = strdup(filename.c_str()); |
| 811 | file_remove(basedir, dirname(path)); |
| 812 | free(path); |
| 813 | } |
| 814 | } |