cmdline/apt-cdrom.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: apt-cdrom.cc,v 1.40 2001/08/18 22:23:38 jgg Exp $
   4 /* ######################################################################
   5
   6    APT CDROM - Tool for handling APT's CDROM database.
   7
   8    Currently the only option is 'add' which will take the current CD
   9    in the drive and add it into the database.
  10
  11    ##################################################################### */
  12                                                                         /*}}}*/
  13 // Include Files                                                        /*{{{*/
  14 #include <apt-pkg/cmndline.h>
  15 #include <apt-pkg/error.h>
  16 #include <apt-pkg/init.h>
  17 #include <apt-pkg/fileutl.h>
  18 #include <apt-pkg/progress.h>
  19 #include <apt-pkg/cdromutl.h>
  20 #include <apt-pkg/strutl.h>
  21 #include <config.h>
  22 #include <apti18n.h>
  23
  24 #include "indexcopy.h"
  25
  26 #include <iostream>
  27 #include <fstream>
  28 #include <vector>
  29 #include <algorithm>
  30 #include <sys/stat.h>
  31 #include <fcntl.h>
  32 #include <dirent.h>
  33 #include <unistd.h>
  34 #include <stdio.h>
  35                                                                         /*}}}*/
  36
  37 using namespace std;
  38
  39 // FindPackages - Find the package files on the CDROM                   /*{{{*/
  40 // ---------------------------------------------------------------------
  41 /* We look over the cdrom for package files. This is a recursive
  42    search that short circuits when it his a package file in the dir.
  43    This speeds it up greatly as the majority of the size is in the
  44    binary-* sub dirs. */
  45 bool FindPackages(string CD,vector<string> &List,vector<string> &SList,
  46                   string &InfoDir,unsigned int Depth = 0)
  47 {
  48    static ino_t Inodes[9];
  49    if (Depth >= 7)
  50       return true;
  51
  52    if (CD[CD.length()-1] != '/')
  53       CD += '/';
  54
  55    if (chdir(CD.c_str()) != 0)
  56       return _error->Errno("chdir","Unable to change to %s",CD.c_str());
  57
  58    // Look for a .disk subdirectory
  59    struct stat Buf;
  60    if (stat(".disk",&Buf) == 0)
  61    {
  62       if (InfoDir.empty() == true)
  63          InfoDir = CD + ".disk/";
  64    }
  65
  66    // Don't look into directories that have been marked to ingore.
  67    if (stat(".aptignr",&Buf) == 0)
  68       return true;
  69
  70    /* Aha! We found some package files. We assume that everything under
  71       this dir is controlled by those package files so we don't look down
  72       anymore */
  73    if (stat("Packages",&Buf) == 0 || stat("Packages.gz",&Buf) == 0)
  74    {
  75       List.push_back(CD);
  76
  77       // Continue down if thorough is given
  78       if (_config->FindB("APT::CDROM::Thorough",false) == false)
  79          return true;
  80    }
  81    if (stat("Sources.gz",&Buf) == 0 || stat("Sources",&Buf) == 0)
  82    {
  83       SList.push_back(CD);
  84
  85       // Continue down if thorough is given
  86       if (_config->FindB("APT::CDROM::Thorough",false) == false)
  87          return true;
  88    }
  89
  90    DIR *D = opendir(".");
  91    if (D == 0)
  92       return _error->Errno("opendir","Unable to read %s",CD.c_str());
  93
  94    // Run over the directory
  95    for (struct dirent *Dir = readdir(D); Dir != 0; Dir = readdir(D))
  96    {
  97       // Skip some files..
  98       if (strcmp(Dir->d_name,".") == 0 ||
  99           strcmp(Dir->d_name,"..") == 0 ||
 100           //strcmp(Dir->d_name,"source") == 0 ||
 101           strcmp(Dir->d_name,".disk") == 0 ||
 102           strcmp(Dir->d_name,"experimental") == 0 ||
 103           strcmp(Dir->d_name,"binary-all") == 0)
 104          continue;
 105
 106       // See if the name is a sub directory
 107       struct stat Buf;
 108       if (stat(Dir->d_name,&Buf) != 0)
 109          continue;
 110
 111       if (S_ISDIR(Buf.st_mode) == 0)
 112          continue;
 113
 114       unsigned int I;
 115       for (I = 0; I != Depth; I++)
 116          if (Inodes[I] == Buf.st_ino)
 117             break;
 118       if (I != Depth)
 119          continue;
 120
 121       // Store the inodes weve seen
 122       Inodes[Depth] = Buf.st_ino;
 123
 124       // Descend
 125       if (FindPackages(CD + Dir->d_name,List,SList,InfoDir,Depth+1) == false)
 126          break;
 127
 128       if (chdir(CD.c_str()) != 0)
 129          return _error->Errno("chdir","Unable to change to %s",CD.c_str());
 130    };
 131
 132    closedir(D);
 133
 134    return !_error->PendingError();
 135 }
 136                                                                         /*}}}*/
 137 // DropBinaryArch - Dump dirs with a string like /binary-<foo>/         /*{{{*/
 138 // ---------------------------------------------------------------------
 139 /* Here we drop everything that is not this machines arch */
 140 bool DropBinaryArch(vector<string> &List)
 141 {
 142    char S[300];
 143    snprintf(S,sizeof(S),"/binary-%s/",
 144             _config->Find("Apt::Architecture").c_str());
 145
 146    for (unsigned int I = 0; I < List.size(); I++)
 147    {
 148       const char *Str = List[I].c_str();
 149
 150       const char *Res;
 151       if ((Res = strstr(Str,"/binary-")) == 0)
 152          continue;
 153
 154       // Weird, remove it.
 155       if (strlen(Res) < strlen(S))
 156       {
 157          List.erase(List.begin() + I);
 158          I--;
 159          continue;
 160       }
 161
 162       // See if it is our arch
 163       if (stringcmp(Res,Res + strlen(S),S) == 0)
 164          continue;
 165
 166       // Erase it
 167       List.erase(List.begin() + I);
 168       I--;
 169    }
 170
 171    return true;
 172 }
 173                                                                         /*}}}*/
 174 // Score - We compute a 'score' for a path                              /*{{{*/
 175 // ---------------------------------------------------------------------
 176 /* Paths are scored based on how close they come to what I consider
 177    normal. That is ones that have 'dist' 'stable' 'frozen' will score
 178    higher than ones without. */
 179 int Score(string Path)
 180 {
 181    int Res = 0;
 182    if (Path.find("stable/") != string::npos)
 183       Res += 29;
 184    if (Path.find("/binary-") != string::npos)
 185       Res += 20;
 186    if (Path.find("frozen/") != string::npos)
 187       Res += 28;
 188    if (Path.find("unstable/") != string::npos)
 189       Res += 27;
 190    if (Path.find("/dists/") != string::npos)
 191       Res += 40;
 192    if (Path.find("/main/") != string::npos)
 193       Res += 20;
 194    if (Path.find("/contrib/") != string::npos)
 195       Res += 20;
 196    if (Path.find("/non-free/") != string::npos)
 197       Res += 20;
 198    if (Path.find("/non-US/") != string::npos)
 199       Res += 20;
 200    if (Path.find("/source/") != string::npos)
 201       Res += 10;
 202    if (Path.find("/debian/") != string::npos)
 203       Res -= 10;
 204    return Res;
 205 }
 206                                                                         /*}}}*/
 207 // DropRepeats - Drop repeated files resulting from symlinks            /*{{{*/
 208 // ---------------------------------------------------------------------
 209 /* Here we go and stat every file that we found and strip dup inodes. */
 210 bool DropRepeats(vector<string> &List,const char *Name)
 211 {
 212    // Get a list of all the inodes
 213    ino_t *Inodes = new ino_t[List.size()];
 214    for (unsigned int I = 0; I != List.size(); I++)
 215    {
 216       struct stat Buf;
 217       if (stat((List[I] + Name).c_str(),&Buf) != 0 &&
 218           stat((List[I] + Name + ".gz").c_str(),&Buf) != 0)
 219          _error->Errno("stat","Failed to stat %s%s",List[I].c_str(),
 220                        Name);
 221       Inodes[I] = Buf.st_ino;
 222    }
 223
 224    if (_error->PendingError() == true)
 225       return false;
 226
 227    // Look for dups
 228    for (unsigned int I = 0; I != List.size(); I++)
 229    {
 230       for (unsigned int J = I+1; J < List.size(); J++)
 231       {
 232          // No match
 233          if (Inodes[J] != Inodes[I])
 234             continue;
 235
 236          // We score the two paths.. and erase one
 237          int ScoreA = Score(List[I]);
 238          int ScoreB = Score(List[J]);
 239          if (ScoreA < ScoreB)
 240          {
 241             List[I] = string();
 242             break;
 243          }
 244
 245          List[J] = string();
 246       }
 247    }
 248
 249    // Wipe erased entries
 250    for (unsigned int I = 0; I < List.size();)
 251    {
 252       if (List[I].empty() == false)
 253          I++;
 254       else
 255          List.erase(List.begin()+I);
 256    }
 257
 258    return true;
 259 }
 260                                                                         /*}}}*/
 261
 262 // ReduceSourceList - Takes the path list and reduces it                /*{{{*/
 263 // ---------------------------------------------------------------------
 264 /* This takes the list of source list expressed entires and collects
 265    similar ones to form a single entry for each dist */
 266 void ReduceSourcelist(string CD,vector<string> &List)
 267 {
 268    sort(List.begin(),List.end());
 269
 270    // Collect similar entries
 271    for (vector<string>::iterator I = List.begin(); I != List.end(); I++)
 272    {
 273       // Find a space..
 274       string::size_type Space = (*I).find(' ');
 275       if (Space == string::npos)
 276          continue;
 277       string::size_type SSpace = (*I).find(' ',Space + 1);
 278       if (SSpace == string::npos)
 279          continue;
 280
 281       string Word1 = string(*I,Space,SSpace-Space);
 282       string Prefix = string(*I,0,Space);
 283       for (vector<string>::iterator J = List.begin(); J != I; J++)
 284       {
 285          // Find a space..
 286          string::size_type Space2 = (*J).find(' ');
 287          if (Space2 == string::npos)
 288             continue;
 289          string::size_type SSpace2 = (*J).find(' ',Space2 + 1);
 290          if (SSpace2 == string::npos)
 291             continue;
 292
 293          if (string(*J,0,Space2) != Prefix)
 294             continue;
 295          if (string(*J,Space2,SSpace2-Space2) != Word1)
 296             continue;
 297
 298          *J += string(*I,SSpace);
 299          *I = string();
 300       }
 301    }
 302
 303    // Wipe erased entries
 304    for (unsigned int I = 0; I < List.size();)
 305    {
 306       if (List[I].empty() == false)
 307          I++;
 308       else
 309          List.erase(List.begin()+I);
 310    }
 311 }
 312                                                                         /*}}}*/
 313 // WriteDatabase - Write the CDROM Database file                        /*{{{*/
 314 // ---------------------------------------------------------------------
 315 /* We rewrite the configuration class associated with the cdrom database. */
 316 bool WriteDatabase(Configuration &Cnf)
 317 {
 318    string DFile = _config->FindFile("Dir::State::cdroms");
 319    string NewFile = DFile + ".new";
 320
 321    unlink(NewFile.c_str());
 322    ofstream Out(NewFile.c_str());
 323    if (!Out)
 324       return _error->Errno("ofstream::ofstream",
 325                            "Failed to open %s.new",DFile.c_str());
 326
 327    /* Write out all of the configuration directives by walking the
 328       configuration tree */
 329    const Configuration::Item *Top = Cnf.Tree(0);
 330    for (; Top != 0;)
 331    {
 332       // Print the config entry
 333       if (Top->Value.empty() == false)
 334          Out <<  Top->FullTag() + " \"" << Top->Value << "\";" << endl;
 335
 336       if (Top->Child != 0)
 337       {
 338          Top = Top->Child;
 339          continue;
 340       }
 341
 342       while (Top != 0 && Top->Next == 0)
 343          Top = Top->Parent;
 344       if (Top != 0)
 345          Top = Top->Next;
 346    }
 347
 348    Out.close();
 349
 350    rename(DFile.c_str(),string(DFile + '~').c_str());
 351    if (rename(NewFile.c_str(),DFile.c_str()) != 0)
 352       return _error->Errno("rename","Failed to rename %s.new to %s",
 353                            DFile.c_str(),DFile.c_str());
 354
 355    return true;
 356 }
 357                                                                         /*}}}*/
 358 // WriteSourceList - Write an updated sourcelist                        /*{{{*/
 359 // ---------------------------------------------------------------------
 360 /* This reads the old source list and copies it into the new one. It
 361    appends the new CDROM entires just after the first block of comments.
 362    This places them first in the file. It also removes any old entries
 363    that were the same. */
 364 bool WriteSourceList(string Name,vector<string> &List,bool Source)
 365 {
 366    if (List.size() == 0)
 367       return true;
 368
 369    string File = _config->FindFile("Dir::Etc::sourcelist");
 370
 371    // Open the stream for reading
 372    ifstream F((FileExists(File)?File.c_str():"/dev/null"),
 373               ios::in );
 374    if (!F != 0)
 375       return _error->Errno("ifstream::ifstream","Opening %s",File.c_str());
 376
 377    string NewFile = File + ".new";
 378    unlink(NewFile.c_str());
 379    ofstream Out(NewFile.c_str());
 380    if (!Out)
 381       return _error->Errno("ofstream::ofstream",
 382                            "Failed to open %s.new",File.c_str());
 383
 384    // Create a short uri without the path
 385    string ShortURI = "cdrom:[" + Name + "]/";
 386    string ShortURI2 = "cdrom:" + Name + "/";     // For Compatibility
 387
 388    const char *Type;
 389    if (Source == true)
 390       Type = "deb-src";
 391    else
 392       Type = "deb";
 393
 394    char Buffer[300];
 395    int CurLine = 0;
 396    bool First = true;
 397    while (F.eof() == false)
 398    {
 399       F.getline(Buffer,sizeof(Buffer));
 400       CurLine++;
 401       _strtabexpand(Buffer,sizeof(Buffer));
 402       _strstrip(Buffer);
 403
 404       // Comment or blank
 405       if (Buffer[0] == '#' || Buffer[0] == 0)
 406       {
 407          Out << Buffer << endl;
 408          continue;
 409       }
 410
 411       if (First == true)
 412       {
 413          for (vector<string>::iterator I = List.begin(); I != List.end(); I++)
 414          {
 415             string::size_type Space = (*I).find(' ');
 416             if (Space == string::npos)
 417                return _error->Error("Internal error");
 418             Out << Type << " cdrom:[" << Name << "]/" << string(*I,0,Space) <<
 419                " " << string(*I,Space+1) << endl;
 420          }
 421       }
 422       First = false;
 423
 424       // Grok it
 425       string cType;
 426       string URI;
 427       const char *C = Buffer;
 428       if (ParseQuoteWord(C,cType) == false ||
 429           ParseQuoteWord(C,URI) == false)
 430       {
 431          Out << Buffer << endl;
 432          continue;
 433       }
 434
 435       // Emit lines like this one
 436       if (cType != Type || (string(URI,0,ShortURI.length()) != ShortURI &&
 437           string(URI,0,ShortURI.length()) != ShortURI2))
 438       {
 439          Out << Buffer << endl;
 440          continue;
 441       }
 442    }
 443
 444    // Just in case the file was empty
 445    if (First == true)
 446    {
 447       for (vector<string>::iterator I = List.begin(); I != List.end(); I++)
 448       {
 449          string::size_type Space = (*I).find(' ');
 450          if (Space == string::npos)
 451             return _error->Error("Internal error");
 452
 453          Out << "deb cdrom:[" << Name << "]/" << string(*I,0,Space) <<
 454             " " << string(*I,Space+1) << endl;
 455       }
 456    }
 457
 458    Out.close();
 459
 460    rename(File.c_str(),string(File + '~').c_str());
 461    if (rename(NewFile.c_str(),File.c_str()) != 0)
 462       return _error->Errno("rename","Failed to rename %s.new to %s",
 463                            File.c_str(),File.c_str());
 464
 465    return true;
 466 }
 467                                                                         /*}}}*/
 468
 469 // Prompt - Simple prompt                                               /*{{{*/
 470 // ---------------------------------------------------------------------
 471 /* */
 472 void Prompt(const char *Text)
 473 {
 474    char C;
 475    cout << Text << ' ' << flush;
 476    read(STDIN_FILENO,&C,1);
 477    if (C != '\n')
 478       cout << endl;
 479 }
 480                                                                         /*}}}*/
 481 // PromptLine - Prompt for an input line                                /*{{{*/
 482 // ---------------------------------------------------------------------
 483 /* */
 484 string PromptLine(const char *Text)
 485 {
 486    cout << Text << ':' << endl;
 487
 488    string Res;
 489    getline(cin,Res);
 490    return Res;
 491 }
 492                                                                         /*}}}*/
 493
 494 // DoAdd - Add a new CDROM                                              /*{{{*/
 495 // ---------------------------------------------------------------------
 496 /* This does the main add bit.. We show some status and things. The
 497    sequence is to mount/umount the CD, Ident it then scan it for package
 498    files and reduce that list. Then we copy over the package files and
 499    verify them. Then rewrite the database files */
 500 bool DoAdd(CommandLine &)
 501 {
 502    // Startup
 503    string CDROM = _config->FindDir("Acquire::cdrom::mount","/cdrom/");
 504    if (CDROM[0] == '.')
 505       CDROM= SafeGetCWD() + '/' + CDROM;
 506
 507    cout << "Using CD-ROM mount point " << CDROM << endl;
 508
 509    // Read the database
 510    Configuration Database;
 511    string DFile = _config->FindFile("Dir::State::cdroms");
 512    if (FileExists(DFile) == true)
 513    {
 514       if (ReadConfigFile(Database,DFile) == false)
 515          return _error->Error("Unable to read the cdrom database %s",
 516                               DFile.c_str());
 517    }
 518
 519    // Unmount the CD and get the user to put in the one they want
 520    if (_config->FindB("APT::CDROM::NoMount",false) == false)
 521    {
 522       cout << "Unmounting CD-ROM" << endl;
 523       UnmountCdrom(CDROM);
 524
 525       // Mount the new CDROM
 526       Prompt("Please insert a Disc in the drive and press enter");
 527       cout << "Mounting CD-ROM" << endl;
 528       if (MountCdrom(CDROM) == false)
 529          return _error->Error("Failed to mount the cdrom.");
 530    }
 531
 532    // Hash the CD to get an ID
 533    cout << "Identifying.. " << flush;
 534    string ID;
 535    if (IdentCdrom(CDROM,ID) == false)
 536    {
 537       cout << endl;
 538       return false;
 539    }
 540
 541    cout << '[' << ID << ']' << endl;
 542
 543    cout << "Scanning Disc for index files..  " << flush;
 544    // Get the CD structure
 545    vector<string> List;
 546    vector<string> sList;
 547    string StartDir = SafeGetCWD();
 548    string InfoDir;
 549    if (FindPackages(CDROM,List,sList,InfoDir) == false)
 550    {
 551       cout << endl;
 552       return false;
 553    }
 554
 555    chdir(StartDir.c_str());
 556
 557    if (_config->FindB("Debug::aptcdrom",false) == true)
 558    {
 559       cout << "I found (binary):" << endl;
 560       for (vector<string>::iterator I = List.begin(); I != List.end(); I++)
 561          cout << *I << endl;
 562       cout << "I found (source):" << endl;
 563       for (vector<string>::iterator I = sList.begin(); I != sList.end(); I++)
 564          cout << *I << endl;
 565    }
 566
 567    // Fix up the list
 568    DropBinaryArch(List);
 569    DropRepeats(List,"Packages");
 570    DropRepeats(sList,"Sources");
 571    cout << "Found " << List.size() << " package indexes and " << sList.size() <<
 572       " source indexes." << endl;
 573
 574    if (List.size() == 0 && sList.size() == 0)
 575       return _error->Error("Unable to locate any package files, perhaps this is not a Debian Disc");
 576
 577    // Check if the CD is in the database
 578    string Name;
 579    if (Database.Exists("CD::" + ID) == false ||
 580        _config->FindB("APT::CDROM::Rename",false) == true)
 581    {
 582       // Try to use the CDs label if at all possible
 583       if (InfoDir.empty() == false &&
 584           FileExists(InfoDir + "/info") == true)
 585       {
 586          ifstream F(string(InfoDir + "/info").c_str());
 587          if (!F == 0)
 588             getline(F,Name);
 589
 590          if (Name.empty() == false)
 591          {
 592             // Escape special characters
 593             string::iterator J = Name.begin();
 594             for (; J != Name.end(); J++)
 595                if (*J == '"' || *J == ']' || *J == '[')
 596                   *J = '_';
 597
 598             cout << "Found label '" << Name << "'" << endl;
 599             Database.Set("CD::" + ID + "::Label",Name);
 600          }
 601       }
 602
 603       if (_config->FindB("APT::CDROM::Rename",false) == true ||
 604           Name.empty() == true)
 605       {
 606          cout << "Please provide a name for this Disc, such as 'Debian 2.1r1 Disk 1'";
 607          while (1)
 608          {
 609             Name = PromptLine("");
 610             if (Name.empty() == false &&
 611                 Name.find('"') == string::npos &&
 612                 Name.find('[') == string::npos &&
 613                 Name.find(']') == string::npos)
 614                break;
 615             cout << "That is not a valid name, try again " << endl;
 616          }
 617       }
 618    }
 619    else
 620       Name = Database.Find("CD::" + ID);
 621
 622    // Escape special characters
 623    string::iterator J = Name.begin();
 624    for (; J != Name.end(); J++)
 625       if (*J == '"' || *J == ']' || *J == '[')
 626          *J = '_';
 627
 628    Database.Set("CD::" + ID,Name);
 629    cout << "This Disc is called:" << endl << " '" << Name << "'" << endl;
 630
 631    // Copy the package files to the state directory
 632    PackageCopy Copy;
 633    SourceCopy SrcCopy;
 634    if (Copy.CopyPackages(CDROM,Name,List) == false ||
 635        SrcCopy.CopyPackages(CDROM,Name,sList) == false)
 636       return false;
 637
 638    ReduceSourcelist(CDROM,List);
 639    ReduceSourcelist(CDROM,sList);
 640
 641    // Write the database and sourcelist
 642    if (_config->FindB("APT::cdrom::NoAct",false) == false)
 643    {
 644       if (WriteDatabase(Database) == false)
 645          return false;
 646
 647       cout << "Writing new source list" << endl;
 648       if (WriteSourceList(Name,List,false) == false ||
 649           WriteSourceList(Name,sList,true) == false)
 650          return false;
 651    }
 652
 653    // Print the sourcelist entries
 654    cout << "Source List entries for this Disc are:" << endl;
 655    for (vector<string>::iterator I = List.begin(); I != List.end(); I++)
 656    {
 657       string::size_type Space = (*I).find(' ');
 658       if (Space == string::npos)
 659          return _error->Error("Internal error");
 660
 661       cout << "deb cdrom:[" << Name << "]/" << string(*I,0,Space) <<
 662          " " << string(*I,Space+1) << endl;
 663    }
 664
 665    for (vector<string>::iterator I = sList.begin(); I != sList.end(); I++)
 666    {
 667       string::size_type Space = (*I).find(' ');
 668       if (Space == string::npos)
 669          return _error->Error("Internal error");
 670
 671       cout << "deb-src cdrom:[" << Name << "]/" << string(*I,0,Space) <<
 672          " " << string(*I,Space+1) << endl;
 673    }
 674
 675    cout << "Repeat this process for the rest of the CDs in your set." << endl;
 676
 677    // Unmount and finish
 678    if (_config->FindB("APT::CDROM::NoMount",false) == false)
 679       UnmountCdrom(CDROM);
 680
 681    return true;
 682 }
 683                                                                         /*}}}*/
 684 // DoIdent - Ident a CDROM                                              /*{{{*/
 685 // ---------------------------------------------------------------------
 686 /* */
 687 bool DoIdent(CommandLine &)
 688 {
 689    // Startup
 690    string CDROM = _config->FindDir("Acquire::cdrom::mount","/cdrom/");
 691    if (CDROM[0] == '.')
 692       CDROM= SafeGetCWD() + '/' + CDROM;
 693
 694    cout << "Using CD-ROM mount point " << CDROM << endl;
 695    cout << "Mounting CD-ROM" << endl;
 696    if (MountCdrom(CDROM) == false)
 697       return _error->Error("Failed to mount the cdrom.");
 698
 699    // Hash the CD to get an ID
 700    cout << "Identifying.. " << flush;
 701    string ID;
 702    if (IdentCdrom(CDROM,ID) == false)
 703    {
 704       cout << endl;
 705       return false;
 706    }
 707
 708    cout << '[' << ID << ']' << endl;
 709
 710    // Read the database
 711    Configuration Database;
 712    string DFile = _config->FindFile("Dir::State::cdroms");
 713    if (FileExists(DFile) == true)
 714    {
 715       if (ReadConfigFile(Database,DFile) == false)
 716          return _error->Error("Unable to read the cdrom database %s",
 717                               DFile.c_str());
 718    }
 719    cout << "Stored Label: '" << Database.Find("CD::" + ID) << "'" << endl;
 720    return true;
 721 }
 722                                                                         /*}}}*/
 723
 724 // ShowHelp - Show the help screen                                      /*{{{*/
 725 // ---------------------------------------------------------------------
 726 /* */
 727 int ShowHelp()
 728 {
 729    ioprintf(cout,_("%s %s for %s %s compiled on %s %s\n"),PACKAGE,VERSION,
 730             COMMON_OS,COMMON_CPU,__DATE__,__TIME__);
 731    if (_config->FindB("version") == true)
 732       return 0;
 733
 734    cout <<
 735       "Usage: apt-cdrom [options] command\n"
 736       "\n"
 737       "apt-cdrom is a tool to add CDROM's to APT's source list. The\n"
 738       "CDROM mount point and device information is taken from apt.conf\n"
 739       "and /etc/fstab.\n"
 740       "\n"
 741       "Commands:\n"
 742       "   add - Add a CDROM\n"
 743       "   ident - Report the identity of a CDROM\n"
 744       "\n"
 745       "Options:\n"
 746       "  -h   This help text\n"
 747       "  -d   CD-ROM mount point\n"
 748       "  -r   Rename a recognized CD-ROM\n"
 749       "  -m   No mounting\n"
 750       "  -f   Fast mode, don't check package files\n"
 751       "  -a   Thorough scan mode\n"
 752       "  -c=? Read this configuration file\n"
 753       "  -o=? Set an arbitary configuration option, eg -o dir::cache=/tmp\n"
 754       "See fstab(5)\n";
 755    return 0;
 756 }
 757                                                                         /*}}}*/
 758
 759 int main(int argc,const char *argv[])
 760 {
 761    CommandLine::Args Args[] = {
 762       {'h',"help","help",0},
 763       {'v',"version","version",0},
 764       {'d',"cdrom","Acquire::cdrom::mount",CommandLine::HasArg},
 765       {'r',"rename","APT::CDROM::Rename",0},
 766       {'m',"no-mount","APT::CDROM::NoMount",0},
 767       {'f',"fast","APT::CDROM::Fast",0},
 768       {'n',"just-print","APT::CDROM::NoAct",0},
 769       {'n',"recon","APT::CDROM::NoAct",0},
 770       {'n',"no-act","APT::CDROM::NoAct",0},
 771       {'a',"thorough","APT::CDROM::Thorough",0},
 772       {'c',"config-file",0,CommandLine::ConfigFile},
 773       {'o',"option",0,CommandLine::ArbItem},
 774       {0,0,0,0}};
 775    CommandLine::Dispatch Cmds[] = {
 776       {"add",&DoAdd},
 777       {"ident",&DoIdent},
 778       {0,0}};
 779
 780    // Parse the command line and initialize the package library
 781    CommandLine CmdL(Args,_config);
 782    if (pkgInitConfig(*_config) == false ||
 783        CmdL.Parse(argc,argv) == false ||
 784        pkgInitSystem(*_config,_system) == false)
 785    {
 786       _error->DumpErrors();
 787       return 100;
 788    }
 789
 790    // See if the help should be shown
 791    if (_config->FindB("help") == true || _config->FindB("version") == true ||
 792        CmdL.FileSize() == 0)
 793       return ShowHelp();
 794
 795    // Deal with stdout not being a tty
 796    if (ttyname(STDOUT_FILENO) == 0 && _config->FindI("quiet",0) < 1)
 797       _config->Set("quiet","1");
 798
 799    // Match the operation
 800    CmdL.DispatchArg(Cmds);
 801
 802    // Print any errors or warnings found during parsing
 803    if (_error->empty() == false)
 804    {
 805       bool Errors = _error->PendingError();
 806       _error->DumpErrors();
 807       return Errors == true?100:0;
 808    }
 809
 810    return 0;
 811 }