| 1 | // -*- mode: cpp; mode: fold -*- |
| 2 | // Description /*{{{*/ |
| 3 | // $Id: indexcopy.cc,v 1.3 1999/12/10 23:40:29 jgg Exp $ |
| 4 | /* ###################################################################### |
| 5 | |
| 6 | Index Copying - Aid for copying and verifying the index files |
| 7 | |
| 8 | This class helps apt-cache reconstruct a damaged index files. |
| 9 | |
| 10 | ##################################################################### */ |
| 11 | /*}}}*/ |
| 12 | // Include Files /*{{{*/ |
| 13 | #include "indexcopy.h" |
| 14 | |
| 15 | #include <apt-pkg/error.h> |
| 16 | #include <apt-pkg/progress.h> |
| 17 | #include <apt-pkg/strutl.h> |
| 18 | #include <apt-pkg/fileutl.h> |
| 19 | #include <apt-pkg/configuration.h> |
| 20 | #include <apt-pkg/tagfile.h> |
| 21 | |
| 22 | #include <iostream.h> |
| 23 | #include <unistd.h> |
| 24 | #include <sys/stat.h> |
| 25 | #include <stdio.h> |
| 26 | /*}}}*/ |
| 27 | |
| 28 | // IndexCopy::CopyPackages - Copy the package files from the CD /*{{{*/ |
| 29 | // --------------------------------------------------------------------- |
| 30 | /* */ |
| 31 | bool IndexCopy::CopyPackages(string CDROM,string Name,vector<string> &List) |
| 32 | { |
| 33 | if (List.size() == 0) |
| 34 | return true; |
| 35 | |
| 36 | OpTextProgress Progress; |
| 37 | |
| 38 | bool NoStat = _config->FindB("APT::CDROM::Fast",false); |
| 39 | bool Debug = _config->FindB("Debug::aptcdrom",false); |
| 40 | |
| 41 | // Prepare the progress indicator |
| 42 | unsigned long TotalSize = 0; |
| 43 | for (vector<string>::iterator I = List.begin(); I != List.end(); I++) |
| 44 | { |
| 45 | struct stat Buf; |
| 46 | if (stat(string(*I + GetFileName()).c_str(),&Buf) != 0 && |
| 47 | stat(string(*I + GetFileName() + ".gz").c_str(),&Buf) != 0) |
| 48 | return _error->Errno("stat","Stat failed for %s", |
| 49 | string(*I + GetFileName()).c_str()); |
| 50 | TotalSize += Buf.st_size; |
| 51 | } |
| 52 | |
| 53 | unsigned long CurrentSize = 0; |
| 54 | unsigned int NotFound = 0; |
| 55 | unsigned int WrongSize = 0; |
| 56 | unsigned int Packages = 0; |
| 57 | for (vector<string>::iterator I = List.begin(); I != List.end(); I++) |
| 58 | { |
| 59 | string OrigPath = string(*I,CDROM.length()); |
| 60 | unsigned long FileSize = 0; |
| 61 | |
| 62 | // Open the package file |
| 63 | FileFd Pkg; |
| 64 | if (FileExists(*I + GetFileName()) == true) |
| 65 | { |
| 66 | Pkg.Open(*I + GetFileName(),FileFd::ReadOnly); |
| 67 | FileSize = Pkg.Size(); |
| 68 | } |
| 69 | else |
| 70 | { |
| 71 | FileFd From(*I + GetFileName() + ".gz",FileFd::ReadOnly); |
| 72 | if (_error->PendingError() == true) |
| 73 | return false; |
| 74 | FileSize = From.Size(); |
| 75 | |
| 76 | // Get a temp file |
| 77 | FILE *tmp = tmpfile(); |
| 78 | if (tmp == 0) |
| 79 | return _error->Errno("tmpfile","Unable to create a tmp file"); |
| 80 | Pkg.Fd(dup(fileno(tmp))); |
| 81 | fclose(tmp); |
| 82 | |
| 83 | // Fork gzip |
| 84 | int Process = fork(); |
| 85 | if (Process < 0) |
| 86 | return _error->Errno("fork","Couldn't fork gzip"); |
| 87 | |
| 88 | // The child |
| 89 | if (Process == 0) |
| 90 | { |
| 91 | dup2(From.Fd(),STDIN_FILENO); |
| 92 | dup2(Pkg.Fd(),STDOUT_FILENO); |
| 93 | SetCloseExec(STDIN_FILENO,false); |
| 94 | SetCloseExec(STDOUT_FILENO,false); |
| 95 | |
| 96 | const char *Args[3]; |
| 97 | Args[0] = _config->Find("Dir::bin::gzip","gzip").c_str(); |
| 98 | Args[1] = "-d"; |
| 99 | Args[2] = 0; |
| 100 | execvp(Args[0],(char **)Args); |
| 101 | exit(100); |
| 102 | } |
| 103 | |
| 104 | // Wait for gzip to finish |
| 105 | if (ExecWait(Process,_config->Find("Dir::bin::gzip","gzip").c_str(),false) == false) |
| 106 | return _error->Error("gzip failed, perhaps the disk is full."); |
| 107 | |
| 108 | Pkg.Seek(0); |
| 109 | } |
| 110 | pkgTagFile Parser(Pkg); |
| 111 | if (_error->PendingError() == true) |
| 112 | return false; |
| 113 | |
| 114 | // Open the output file |
| 115 | char S[400]; |
| 116 | sprintf(S,"cdrom:%s/%s%s",Name.c_str(),(*I).c_str() + CDROM.length(), |
| 117 | GetFileName()); |
| 118 | string TargetF = _config->FindDir("Dir::State::lists") + "partial/"; |
| 119 | TargetF += URItoFileName(S); |
| 120 | if (_config->FindB("APT::CDROM::NoAct",false) == true) |
| 121 | TargetF = "/dev/null"; |
| 122 | FileFd Target(TargetF,FileFd::WriteEmpty); |
| 123 | if (_error->PendingError() == true) |
| 124 | return false; |
| 125 | |
| 126 | // Setup the progress meter |
| 127 | Progress.OverallProgress(CurrentSize,TotalSize,FileSize, |
| 128 | string("Reading ") + Type() + " Indexes"); |
| 129 | |
| 130 | // Parse |
| 131 | Progress.SubProgress(Pkg.Size()); |
| 132 | pkgTagSection Section; |
| 133 | this->Section = &Section; |
| 134 | string Prefix; |
| 135 | unsigned long Hits = 0; |
| 136 | unsigned long Chop = 0; |
| 137 | while (Parser.Step(Section) == true) |
| 138 | { |
| 139 | Progress.Progress(Parser.Offset()); |
| 140 | string File; |
| 141 | unsigned long Size; |
| 142 | if (GetFile(File,Size) == false) |
| 143 | return false; |
| 144 | |
| 145 | if (Chop != 0) |
| 146 | File = OrigPath + ChopDirs(File,Chop); |
| 147 | |
| 148 | // See if the file exists |
| 149 | bool Mangled = false; |
| 150 | if (NoStat == false || Hits < 10) |
| 151 | { |
| 152 | // Attempt to fix broken structure |
| 153 | if (Hits == 0) |
| 154 | { |
| 155 | if (ReconstructPrefix(Prefix,OrigPath,CDROM,File) == false && |
| 156 | ReconstructChop(Chop,*I,File) == false) |
| 157 | { |
| 158 | if (Debug == true) |
| 159 | clog << "Missed: " << File << endl; |
| 160 | NotFound++; |
| 161 | continue; |
| 162 | } |
| 163 | if (Chop != 0) |
| 164 | File = OrigPath + ChopDirs(File,Chop); |
| 165 | } |
| 166 | |
| 167 | // Get the size |
| 168 | struct stat Buf; |
| 169 | if (stat(string(CDROM + Prefix + File).c_str(),&Buf) != 0 || |
| 170 | Buf.st_size == 0) |
| 171 | { |
| 172 | // Attempt to fix busted symlink support for one instance |
| 173 | string OrigFile = File; |
| 174 | string::size_type Start = File.find("binary-"); |
| 175 | string::size_type End = File.find("/",Start+3); |
| 176 | if (Start != string::npos && End != string::npos) |
| 177 | { |
| 178 | File.replace(Start,End-Start,"binary-all"); |
| 179 | Mangled = true; |
| 180 | } |
| 181 | |
| 182 | if (Mangled == false || |
| 183 | stat(string(CDROM + Prefix + File).c_str(),&Buf) != 0) |
| 184 | { |
| 185 | if (Debug == true) |
| 186 | clog << "Missed(2): " << OrigFile << endl; |
| 187 | NotFound++; |
| 188 | continue; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | // Size match |
| 193 | if ((unsigned)Buf.st_size != Size) |
| 194 | { |
| 195 | if (Debug == true) |
| 196 | clog << "Wrong Size: " << File << endl; |
| 197 | WrongSize++; |
| 198 | continue; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | Packages++; |
| 203 | Hits++; |
| 204 | |
| 205 | // Copy it to the target package file |
| 206 | if (Chop != 0 || Mangled == true) |
| 207 | { |
| 208 | if (RewriteEntry(Target,File) == false) |
| 209 | continue; |
| 210 | } |
| 211 | else |
| 212 | { |
| 213 | const char *Start; |
| 214 | const char *Stop; |
| 215 | Section.GetSection(Start,Stop); |
| 216 | if (Target.Write(Start,Stop-Start) == false) |
| 217 | return false; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | if (Debug == true) |
| 222 | cout << " Processed by using Prefix '" << Prefix << "' and chop " << Chop << endl; |
| 223 | |
| 224 | if (_config->FindB("APT::CDROM::NoAct",false) == false) |
| 225 | { |
| 226 | // Move out of the partial directory |
| 227 | Target.Close(); |
| 228 | string FinalF = _config->FindDir("Dir::State::lists"); |
| 229 | FinalF += URItoFileName(S); |
| 230 | if (rename(TargetF.c_str(),FinalF.c_str()) != 0) |
| 231 | return _error->Errno("rename","Failed to rename"); |
| 232 | |
| 233 | // Copy the release file |
| 234 | sprintf(S,"cdrom:%s/%sRelease",Name.c_str(),(*I).c_str() + CDROM.length()); |
| 235 | string TargetF = _config->FindDir("Dir::State::lists") + "partial/"; |
| 236 | TargetF += URItoFileName(S); |
| 237 | if (FileExists(*I + "Release") == true) |
| 238 | { |
| 239 | FileFd Target(TargetF,FileFd::WriteEmpty); |
| 240 | FileFd Rel(*I + "Release",FileFd::ReadOnly); |
| 241 | if (_error->PendingError() == true) |
| 242 | return false; |
| 243 | |
| 244 | if (CopyFile(Rel,Target) == false) |
| 245 | return false; |
| 246 | } |
| 247 | else |
| 248 | { |
| 249 | // Empty release file |
| 250 | FileFd Target(TargetF,FileFd::WriteEmpty); |
| 251 | } |
| 252 | |
| 253 | // Rename the release file |
| 254 | FinalF = _config->FindDir("Dir::State::lists"); |
| 255 | FinalF += URItoFileName(S); |
| 256 | if (rename(TargetF.c_str(),FinalF.c_str()) != 0) |
| 257 | return _error->Errno("rename","Failed to rename"); |
| 258 | } |
| 259 | |
| 260 | /* Mangle the source to be in the proper notation with |
| 261 | prefix dist [component] */ |
| 262 | *I = string(*I,Prefix.length()); |
| 263 | ConvertToSourceList(CDROM,*I); |
| 264 | *I = Prefix + ' ' + *I; |
| 265 | |
| 266 | CurrentSize += FileSize; |
| 267 | } |
| 268 | Progress.Done(); |
| 269 | |
| 270 | // Some stats |
| 271 | cout << "Wrote " << Packages << " records" ; |
| 272 | if (NotFound != 0) |
| 273 | cout << " with " << NotFound << " missing files"; |
| 274 | if (NotFound != 0 && WrongSize != 0) |
| 275 | cout << " and"; |
| 276 | if (WrongSize != 0) |
| 277 | cout << " with " << WrongSize << " mismatched files"; |
| 278 | cout << '.' << endl; |
| 279 | |
| 280 | if (Packages == 0) |
| 281 | return _error->Warning("No valid records were found."); |
| 282 | |
| 283 | if (NotFound + WrongSize > 10) |
| 284 | cout << "Alot of entries were discarded, something may be wrong." << endl; |
| 285 | |
| 286 | return true; |
| 287 | } |
| 288 | /*}}}*/ |
| 289 | // IndexCopy::ChopDirs - Chop off the leading directory components /*{{{*/ |
| 290 | // --------------------------------------------------------------------- |
| 291 | /* */ |
| 292 | string IndexCopy::ChopDirs(string Path,unsigned int Depth) |
| 293 | { |
| 294 | string::size_type I = 0; |
| 295 | do |
| 296 | { |
| 297 | I = Path.find('/',I+1); |
| 298 | Depth--; |
| 299 | } |
| 300 | while (I != string::npos && Depth != 0); |
| 301 | |
| 302 | if (I == string::npos) |
| 303 | return string(); |
| 304 | |
| 305 | return string(Path,I+1); |
| 306 | } |
| 307 | /*}}}*/ |
| 308 | // IndexCopy::ReconstructPrefix - Fix strange prefixing /*{{{*/ |
| 309 | // --------------------------------------------------------------------- |
| 310 | /* This prepends dir components from the path to the package files to |
| 311 | the path to the deb until it is found */ |
| 312 | bool IndexCopy::ReconstructPrefix(string &Prefix,string OrigPath,string CD, |
| 313 | string File) |
| 314 | { |
| 315 | bool Debug = _config->FindB("Debug::aptcdrom",false); |
| 316 | unsigned int Depth = 1; |
| 317 | string MyPrefix = Prefix; |
| 318 | while (1) |
| 319 | { |
| 320 | struct stat Buf; |
| 321 | if (stat(string(CD + MyPrefix + File).c_str(),&Buf) != 0) |
| 322 | { |
| 323 | if (Debug == true) |
| 324 | cout << "Failed, " << CD + MyPrefix + File << endl; |
| 325 | if (GrabFirst(OrigPath,MyPrefix,Depth++) == true) |
| 326 | continue; |
| 327 | |
| 328 | return false; |
| 329 | } |
| 330 | else |
| 331 | { |
| 332 | Prefix = MyPrefix; |
| 333 | return true; |
| 334 | } |
| 335 | } |
| 336 | return false; |
| 337 | } |
| 338 | /*}}}*/ |
| 339 | // IndexCopy::ReconstructChop - Fixes bad source paths /*{{{*/ |
| 340 | // --------------------------------------------------------------------- |
| 341 | /* This removes path components from the filename and prepends the location |
| 342 | of the package files until a file is found */ |
| 343 | bool IndexCopy::ReconstructChop(unsigned long &Chop,string Dir,string File) |
| 344 | { |
| 345 | // Attempt to reconstruct the filename |
| 346 | unsigned long Depth = 0; |
| 347 | while (1) |
| 348 | { |
| 349 | struct stat Buf; |
| 350 | if (stat(string(Dir + File).c_str(),&Buf) != 0) |
| 351 | { |
| 352 | File = ChopDirs(File,1); |
| 353 | Depth++; |
| 354 | if (File.empty() == false) |
| 355 | continue; |
| 356 | return false; |
| 357 | } |
| 358 | else |
| 359 | { |
| 360 | Chop = Depth; |
| 361 | return true; |
| 362 | } |
| 363 | } |
| 364 | return false; |
| 365 | } |
| 366 | /*}}}*/ |
| 367 | // IndexCopy::ConvertToSourceList - Convert a Path to a sourcelist /*{{{*/ |
| 368 | // --------------------------------------------------------------------- |
| 369 | /* We look for things in dists/ notation and convert them to |
| 370 | <dist> <component> form otherwise it is left alone. This also strips |
| 371 | the CD path. */ |
| 372 | void IndexCopy::ConvertToSourceList(string CD,string &Path) |
| 373 | { |
| 374 | char S[300]; |
| 375 | sprintf(S,"binary-%s",_config->Find("Apt::Architecture").c_str()); |
| 376 | |
| 377 | // Strip the cdrom base path |
| 378 | Path = string(Path,CD.length()); |
| 379 | if (Path.empty() == true) |
| 380 | Path = "/"; |
| 381 | |
| 382 | // Too short to be a dists/ type |
| 383 | if (Path.length() < strlen("dists/")) |
| 384 | return; |
| 385 | |
| 386 | // Not a dists type. |
| 387 | if (stringcmp(Path.begin(),Path.begin()+strlen("dists/"),"dists/") != 0) |
| 388 | return; |
| 389 | |
| 390 | // Isolate the dist |
| 391 | string::size_type Slash = strlen("dists/"); |
| 392 | string::size_type Slash2 = Path.find('/',Slash + 1); |
| 393 | if (Slash2 == string::npos || Slash2 + 2 >= Path.length()) |
| 394 | return; |
| 395 | string Dist = string(Path,Slash,Slash2 - Slash); |
| 396 | |
| 397 | // Isolate the component |
| 398 | Slash = Path.find('/',Slash2+1); |
| 399 | if (Slash == string::npos || Slash + 2 >= Path.length()) |
| 400 | return; |
| 401 | string Comp = string(Path,Slash2+1,Slash - Slash2-1); |
| 402 | |
| 403 | // Verify the trailing binar - bit |
| 404 | Slash2 = Path.find('/',Slash + 1); |
| 405 | if (Slash == string::npos) |
| 406 | return; |
| 407 | string Binary = string(Path,Slash+1,Slash2 - Slash-1); |
| 408 | |
| 409 | if (Binary != S && Binary != "source") |
| 410 | return; |
| 411 | |
| 412 | Path = Dist + ' ' + Comp; |
| 413 | } |
| 414 | /*}}}*/ |
| 415 | // IndexCopy::GrabFirst - Return the first Depth path components /*{{{*/ |
| 416 | // --------------------------------------------------------------------- |
| 417 | /* */ |
| 418 | bool IndexCopy::GrabFirst(string Path,string &To,unsigned int Depth) |
| 419 | { |
| 420 | string::size_type I = 0; |
| 421 | do |
| 422 | { |
| 423 | I = Path.find('/',I+1); |
| 424 | Depth--; |
| 425 | } |
| 426 | while (I != string::npos && Depth != 0); |
| 427 | |
| 428 | if (I == string::npos) |
| 429 | return false; |
| 430 | |
| 431 | To = string(Path,0,I+1); |
| 432 | return true; |
| 433 | } |
| 434 | /*}}}*/ |
| 435 | // IndexCopy::CopyWithReplace - Copy a section and replace text /*{{{*/ |
| 436 | // --------------------------------------------------------------------- |
| 437 | /* */ |
| 438 | bool IndexCopy::CopyWithReplace(FileFd &Target,const char *Tag,string New) |
| 439 | { |
| 440 | // Mangle the output filename |
| 441 | const char *Start; |
| 442 | const char *Stop; |
| 443 | const char *Filename; |
| 444 | Section->Find(Tag,Filename,Stop); |
| 445 | |
| 446 | /* We need to rewrite the filename field so we emit |
| 447 | all fields except the filename file and rewrite that one */ |
| 448 | for (unsigned int I = 0; I != Section->Count(); I++) |
| 449 | { |
| 450 | Section->Get(Start,Stop,I); |
| 451 | if (Start <= Filename && Stop > Filename) |
| 452 | { |
| 453 | char S[500]; |
| 454 | sprintf(S,"%s: %s\n",Tag,New.c_str()); |
| 455 | if (I + 1 == Section->Count()) |
| 456 | strcat(S,"\n"); |
| 457 | if (Target.Write(S,strlen(S)) == false) |
| 458 | return false; |
| 459 | } |
| 460 | else |
| 461 | { |
| 462 | if (Target.Write(Start,Stop-Start) == false) |
| 463 | return false; |
| 464 | if (Stop[-1] != '\n') |
| 465 | if (Target.Write("\n",1) == false) |
| 466 | return false; |
| 467 | } |
| 468 | } |
| 469 | if (Target.Write("\n",1) == false) |
| 470 | return false; |
| 471 | } |
| 472 | /*}}}*/ |
| 473 | // PackageCopy::GetFile - Get the file information from the section /*{{{*/ |
| 474 | // --------------------------------------------------------------------- |
| 475 | /* */ |
| 476 | bool PackageCopy::GetFile(string &File,unsigned long &Size) |
| 477 | { |
| 478 | File = Section->FindS("Filename"); |
| 479 | Size = Section->FindI("Size"); |
| 480 | if (File.empty() || Size == 0) |
| 481 | return _error->Error("Cannot find filename or size tag"); |
| 482 | return true; |
| 483 | } |
| 484 | /*}}}*/ |
| 485 | // PackageCopy::RewriteEntry - Rewrite the entry with a new filename /*{{{*/ |
| 486 | // --------------------------------------------------------------------- |
| 487 | /* */ |
| 488 | bool PackageCopy::RewriteEntry(FileFd &Target,string File) |
| 489 | { |
| 490 | return CopyWithReplace(Target,"Filename",File); |
| 491 | } |
| 492 | /*}}}*/ |
| 493 | // SourceCopy::GetFile - Get the file information from the section /*{{{*/ |
| 494 | // --------------------------------------------------------------------- |
| 495 | /* */ |
| 496 | bool SourceCopy::GetFile(string &File,unsigned long &Size) |
| 497 | { |
| 498 | string Files = Section->FindS("Files"); |
| 499 | if (Files.empty() == true) |
| 500 | return false; |
| 501 | |
| 502 | // Stash the / terminated directory prefix |
| 503 | string Base = Section->FindS("Directory"); |
| 504 | if (Base.empty() == false && Base[Base.length()-1] != '/') |
| 505 | Base += '/'; |
| 506 | |
| 507 | // Iterate over the entire list grabbing each triplet |
| 508 | const char *C = Files.c_str(); |
| 509 | string sSize; |
| 510 | string MD5Hash; |
| 511 | |
| 512 | // Parse each of the elements |
| 513 | if (ParseQuoteWord(C,MD5Hash) == false || |
| 514 | ParseQuoteWord(C,sSize) == false || |
| 515 | ParseQuoteWord(C,File) == false) |
| 516 | return _error->Error("Error parsing file record"); |
| 517 | |
| 518 | // Parse the size and append the directory |
| 519 | Size = atoi(sSize.c_str()); |
| 520 | File = Base + File; |
| 521 | return true; |
| 522 | } |
| 523 | /*}}}*/ |
| 524 | // SourceCopy::RewriteEntry - Rewrite the entry with a new filename /*{{{*/ |
| 525 | // --------------------------------------------------------------------- |
| 526 | /* */ |
| 527 | bool SourceCopy::RewriteEntry(FileFd &Target,string File) |
| 528 | { |
| 529 | return CopyWithReplace(Target,"Directory", |
| 530 | string(File,0,File.rfind('/'))); |
| 531 | } |
| 532 | /*}}}*/ |