apt-pkg/deb/dpkgpm.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
   4 /* ######################################################################
   5
   6    DPKG Package Manager - Provide an interface to dpkg
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include <config.h>
  12
  13 #include <apt-pkg/dpkgpm.h>
  14 #include <apt-pkg/error.h>
  15 #include <apt-pkg/configuration.h>
  16 #include <apt-pkg/depcache.h>
  17 #include <apt-pkg/pkgrecords.h>
  18 #include <apt-pkg/strutl.h>
  19 #include <apt-pkg/fileutl.h>
  20 #include <apt-pkg/cachefile.h>
  21 #include <apt-pkg/packagemanager.h>
  22
  23 #include <unistd.h>
  24 #include <stdlib.h>
  25 #include <fcntl.h>
  26 #include <sys/select.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <sys/wait.h>
  30 #include <signal.h>
  31 #include <errno.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <algorithm>
  35 #include <sstream>
  36 #include <map>
  37 #include <pwd.h>
  38 #include <grp.h>
  39
  40 #include <termios.h>
  41 #include <unistd.h>
  42 #include <sys/ioctl.h>
  43 #include <pty.h>
  44
  45 #include <apti18n.h>
  46                                                                         /*}}}*/
  47
  48 using namespace std;
  49
  50 class pkgDPkgPMPrivate
  51 {
  52 public:
  53    pkgDPkgPMPrivate() : dpkgbuf_pos(0), term_out(NULL), history_out(NULL)
  54    {
  55    }
  56    bool stdin_is_dev_null;
  57    // the buffer we use for the dpkg status-fd reading
  58    char dpkgbuf[1024];
  59    int dpkgbuf_pos;
  60    FILE *term_out;
  61    FILE *history_out;
  62    string dpkg_error;
  63 };
  64
  65 namespace
  66 {
  67   // Maps the dpkg "processing" info to human readable names.  Entry 0
  68   // of each array is the key, entry 1 is the value.
  69   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  70     std::make_pair("install",   N_("Installing %s")),
  71     std::make_pair("configure", N_("Configuring %s")),
  72     std::make_pair("remove",    N_("Removing %s")),
  73     std::make_pair("purge",    N_("Completely removing %s")),
  74     std::make_pair("disappear", N_("Noting disappearance of %s")),
  75     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  76   };
  77
  78   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  79   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  80
  81   // Predicate to test whether an entry in the PackageProcessingOps
  82   // array matches a string.
  83   class MatchProcessingOp
  84   {
  85     const char *target;
  86
  87   public:
  88     MatchProcessingOp(const char *the_target)
  89       : target(the_target)
  90     {
  91     }
  92
  93     bool operator()(const std::pair<const char *, const char *> &pair) const
  94     {
  95       return strcmp(pair.first, target) == 0;
  96     }
  97   };
  98 }
  99
 100 /* helper function to ionice the given PID
 101
 102  there is no C header for ionice yet - just the syscall interface
 103  so we use the binary from util-linux
 104 */
 105 static bool
 106 ionice(int PID)
 107 {
 108    if (!FileExists("/usr/bin/ionice"))
 109       return false;
 110    pid_t Process = ExecFork();
 111    if (Process == 0)
 112    {
 113       char buf[32];
 114       snprintf(buf, sizeof(buf), "-p%d", PID);
 115       const char *Args[4];
 116       Args[0] = "/usr/bin/ionice";
 117       Args[1] = "-c3";
 118       Args[2] = buf;
 119       Args[3] = 0;
 120       execv(Args[0], (char **)Args);
 121    }
 122    return ExecWait(Process, "ionice");
 123 }
 124
 125 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 126 static void dpkgChrootDirectory()
 127 {
 128    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 129    if (chrootDir == "/")
 130       return;
 131    std::cerr << "Chrooting into " << chrootDir << std::endl;
 132    if (chroot(chrootDir.c_str()) != 0)
 133       _exit(100);
 134 }
 135                                                                         /*}}}*/
 136
 137
 138 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 139 // ---------------------------------------------------------------------
 140 /* This is helpful when a package is no longer installed but has residual
 141  * config files
 142  */
 143 static
 144 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 145 {
 146    pkgCache::VerIterator Ver;
 147    for (Ver = Pkg.VersionList(); Ver.end() == false; Ver++)
 148    {
 149       pkgCache::VerFileIterator Vf = Ver.FileList();
 150       pkgCache::PkgFileIterator F = Vf.File();
 151       for (F = Vf.File(); F.end() == false; F++)
 152       {
 153          if (F && F.Archive())
 154          {
 155             if (strcmp(F.Archive(), "now"))
 156                return Ver;
 157          }
 158       }
 159    }
 160    return Ver;
 161 }
 162                                                                         /*}}}*/
 163
 164 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 165 // ---------------------------------------------------------------------
 166 /* */
 167 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 168    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 169 {
 170    d = new pkgDPkgPMPrivate();
 171 }
 172                                                                         /*}}}*/
 173 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 174 // ---------------------------------------------------------------------
 175 /* */
 176 pkgDPkgPM::~pkgDPkgPM()
 177 {
 178    delete d;
 179 }
 180                                                                         /*}}}*/
 181 // DPkgPM::Install - Install a package                                  /*{{{*/
 182 // ---------------------------------------------------------------------
 183 /* Add an install operation to the sequence list */
 184 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 185 {
 186    if (File.empty() == true || Pkg.end() == true)
 187       return _error->Error("Internal Error, No file name for %s",Pkg.Name());
 188
 189    // If the filename string begins with DPkg::Chroot-Directory, return the
 190    // substr that is within the chroot so dpkg can access it.
 191    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 192    if (chrootdir != "/" && File.find(chrootdir) == 0)
 193    {
 194       size_t len = chrootdir.length();
 195       if (chrootdir.at(len - 1) == '/')
 196         len--;
 197       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 198    }
 199    else
 200       List.push_back(Item(Item::Install,Pkg,File));
 201
 202    return true;
 203 }
 204                                                                         /*}}}*/
 205 // DPkgPM::Configure - Configure a package                              /*{{{*/
 206 // ---------------------------------------------------------------------
 207 /* Add a configure operation to the sequence list */
 208 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 209 {
 210    if (Pkg.end() == true)
 211       return false;
 212
 213    List.push_back(Item(Item::Configure, Pkg));
 214
 215    // Use triggers for config calls if we configure "smart"
 216    // as otherwise Pre-Depends will not be satisfied, see #526774
 217    if (_config->FindB("DPkg::TriggersPending", false) == true)
 218       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 219
 220    return true;
 221 }
 222                                                                         /*}}}*/
 223 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 224 // ---------------------------------------------------------------------
 225 /* Add a remove operation to the sequence list */
 226 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 227 {
 228    if (Pkg.end() == true)
 229       return false;
 230
 231    if (Purge == true)
 232       List.push_back(Item(Item::Purge,Pkg));
 233    else
 234       List.push_back(Item(Item::Remove,Pkg));
 235    return true;
 236 }
 237                                                                         /*}}}*/
 238 // DPkgPM::SendV2Pkgs - Send version 2 package info                     /*{{{*/
 239 // ---------------------------------------------------------------------
 240 /* This is part of the helper script communication interface, it sends
 241    very complete information down to the other end of the pipe.*/
 242 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 243 {
 244    fprintf(F,"VERSION 2\n");
 245
 246    /* Write out all of the configuration directives by walking the
 247       configuration tree */
 248    const Configuration::Item *Top = _config->Tree(0);
 249    for (; Top != 0;)
 250    {
 251       if (Top->Value.empty() == false)
 252       {
 253          fprintf(F,"%s=%s\n",
 254                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 255                  QuoteString(Top->Value,"\n").c_str());
 256       }
 257
 258       if (Top->Child != 0)
 259       {
 260          Top = Top->Child;
 261          continue;
 262       }
 263
 264       while (Top != 0 && Top->Next == 0)
 265          Top = Top->Parent;
 266       if (Top != 0)
 267          Top = Top->Next;
 268    }
 269    fprintf(F,"\n");
 270
 271    // Write out the package actions in order.
 272    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 273    {
 274       if(I->Pkg.end() == true)
 275          continue;
 276
 277       pkgDepCache::StateCache &S = Cache[I->Pkg];
 278
 279       fprintf(F,"%s ",I->Pkg.Name());
 280       // Current version
 281       if (I->Pkg->CurrentVer == 0)
 282          fprintf(F,"- ");
 283       else
 284          fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
 285
 286       // Show the compare operator
 287       // Target version
 288       if (S.InstallVer != 0)
 289       {
 290          int Comp = 2;
 291          if (I->Pkg->CurrentVer != 0)
 292             Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
 293          if (Comp < 0)
 294             fprintf(F,"> ");
 295          if (Comp == 0)
 296             fprintf(F,"= ");
 297          if (Comp > 0)
 298             fprintf(F,"< ");
 299          fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
 300       }
 301       else
 302          fprintf(F,"> - ");
 303
 304       // Show the filename/operation
 305       if (I->Op == Item::Install)
 306       {
 307          // No errors here..
 308          if (I->File[0] != '/')
 309             fprintf(F,"**ERROR**\n");
 310          else
 311             fprintf(F,"%s\n",I->File.c_str());
 312       }
 313       if (I->Op == Item::Configure)
 314          fprintf(F,"**CONFIGURE**\n");
 315       if (I->Op == Item::Remove ||
 316           I->Op == Item::Purge)
 317          fprintf(F,"**REMOVE**\n");
 318
 319       if (ferror(F) != 0)
 320          return false;
 321    }
 322    return true;
 323 }
 324                                                                         /*}}}*/
 325 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 326 // ---------------------------------------------------------------------
 327 /* This looks for a list of scripts to run from the configuration file
 328    each one is run and is fed on standard input a list of all .deb files
 329    that are due to be installed. */
 330 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 331 {
 332    Configuration::Item const *Opts = _config->Tree(Cnf);
 333    if (Opts == 0 || Opts->Child == 0)
 334       return true;
 335    Opts = Opts->Child;
 336
 337    unsigned int Count = 1;
 338    for (; Opts != 0; Opts = Opts->Next, Count++)
 339    {
 340       if (Opts->Value.empty() == true)
 341          continue;
 342
 343       // Determine the protocol version
 344       string OptSec = Opts->Value;
 345       string::size_type Pos;
 346       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 347          Pos = OptSec.length();
 348       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 349
 350       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 351
 352       // Create the pipes
 353       int Pipes[2];
 354       if (pipe(Pipes) != 0)
 355          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 356       SetCloseExec(Pipes[0],true);
 357       SetCloseExec(Pipes[1],true);
 358
 359       // Purified Fork for running the script
 360       pid_t Process = ExecFork();
 361       if (Process == 0)
 362       {
 363          // Setup the FDs
 364          dup2(Pipes[0],STDIN_FILENO);
 365          SetCloseExec(STDOUT_FILENO,false);
 366          SetCloseExec(STDIN_FILENO,false);
 367          SetCloseExec(STDERR_FILENO,false);
 368
 369          dpkgChrootDirectory();
 370          const char *Args[4];
 371          Args[0] = "/bin/sh";
 372          Args[1] = "-c";
 373          Args[2] = Opts->Value.c_str();
 374          Args[3] = 0;
 375          execv(Args[0],(char **)Args);
 376          _exit(100);
 377       }
 378       close(Pipes[0]);
 379       FILE *F = fdopen(Pipes[1],"w");
 380       if (F == 0)
 381          return _error->Errno("fdopen","Faild to open new FD");
 382
 383       // Feed it the filenames.
 384       if (Version <= 1)
 385       {
 386          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 387          {
 388             // Only deal with packages to be installed from .deb
 389             if (I->Op != Item::Install)
 390                continue;
 391
 392             // No errors here..
 393             if (I->File[0] != '/')
 394                continue;
 395
 396             /* Feed the filename of each package that is pending install
 397                into the pipe. */
 398             fprintf(F,"%s\n",I->File.c_str());
 399             if (ferror(F) != 0)
 400                break;
 401          }
 402       }
 403       else
 404          SendV2Pkgs(F);
 405
 406       fclose(F);
 407
 408       // Clean up the sub process
 409       if (ExecWait(Process,Opts->Value.c_str()) == false)
 410          return _error->Error("Failure running script %s",Opts->Value.c_str());
 411    }
 412
 413    return true;
 414 }
 415                                                                         /*}}}*/
 416 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 417 // ---------------------------------------------------------------------
 418 /*
 419 */
 420 void pkgDPkgPM::DoStdin(int master)
 421 {
 422    unsigned char input_buf[256] = {0,};
 423    ssize_t len = read(0, input_buf, sizeof(input_buf));
 424    if (len)
 425       write(master, input_buf, len);
 426    else
 427       d->stdin_is_dev_null = true;
 428 }
 429                                                                         /*}}}*/
 430 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 431 // ---------------------------------------------------------------------
 432 /*
 433  * read the terminal pty and write log
 434  */
 435 void pkgDPkgPM::DoTerminalPty(int master)
 436 {
 437    unsigned char term_buf[1024] = {0,0, };
 438
 439    ssize_t len=read(master, term_buf, sizeof(term_buf));
 440    if(len == -1 && errno == EIO)
 441    {
 442       // this happens when the child is about to exit, we
 443       // give it time to actually exit, otherwise we run
 444       // into a race so we sleep for half a second.
 445       struct timespec sleepfor = { 0, 500000000 };
 446       nanosleep(&sleepfor, NULL);
 447       return;
 448    }
 449    if(len <= 0)
 450       return;
 451    write(1, term_buf, len);
 452    if(d->term_out)
 453       fwrite(term_buf, len, sizeof(char), d->term_out);
 454 }
 455                                                                         /*}}}*/
 456 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 457 // ---------------------------------------------------------------------
 458 /*
 459  */
 460 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 461 {
 462    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 463    // the status we output
 464    ostringstream status;
 465
 466    if (Debug == true)
 467       std::clog << "got from dpkg '" << line << "'" << std::endl;
 468
 469
 470    /* dpkg sends strings like this:
 471       'status:   <pkg>:  <pkg  qstate>'
 472       errors look like this:
 473       'status: /var/cache/apt/archives/krecipes_0.8.1-0ubuntu1_i386.deb : error : trying to overwrite `/usr/share/doc/kde/HTML/en/krecipes/krectip.png', which is also in package krecipes-data
 474       and conffile-prompt like this
 475       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 476
 477       Newer versions of dpkg sent also:
 478       'processing: install: pkg'
 479       'processing: configure: pkg'
 480       'processing: remove: pkg'
 481       'processing: purge: pkg'
 482       'processing: disappear: pkg'
 483       'processing: trigproc: trigger'
 484
 485    */
 486    char* list[6];
 487    //        dpkg sends multiline error messages sometimes (see
 488    //        #374195 for a example. we should support this by
 489    //        either patching dpkg to not send multiline over the
 490    //        statusfd or by rewriting the code here to deal with
 491    //        it. for now we just ignore it and not crash
 492    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 493    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 494    {
 495       if (Debug == true)
 496          std::clog << "ignoring line: not enough ':'" << std::endl;
 497       return;
 498    }
 499    const char* const pkg = list[1];
 500    const char* action = _strstrip(list[2]);
 501
 502    // 'processing' from dpkg looks like
 503    // 'processing: action: pkg'
 504    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 505    {
 506       char s[200];
 507       const char* const pkg_or_trigger = _strstrip(list[2]);
 508       action = _strstrip( list[1]);
 509       const std::pair<const char *, const char *> * const iter =
 510         std::find_if(PackageProcessingOpsBegin,
 511                      PackageProcessingOpsEnd,
 512                      MatchProcessingOp(action));
 513       if(iter == PackageProcessingOpsEnd)
 514       {
 515          if (Debug == true)
 516             std::clog << "ignoring unknown action: " << action << std::endl;
 517          return;
 518       }
 519       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 520
 521       status << "pmstatus:" << pkg_or_trigger
 522              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 523              << ":" << s
 524              << endl;
 525       if(OutStatusFd > 0)
 526          write(OutStatusFd, status.str().c_str(), status.str().size());
 527       if (Debug == true)
 528          std::clog << "send: '" << status.str() << "'" << endl;
 529
 530       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 531          handleDisappearAction(pkg_or_trigger);
 532       return;
 533    }
 534
 535    if(strncmp(action,"error",strlen("error")) == 0)
 536    {
 537       // urgs, sometime has ":" in its error string so that we
 538       // end up with the error message split between list[3]
 539       // and list[4], e.g. the message:
 540       // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 541       // concat them again
 542       if( list[4] != NULL )
 543          list[3][strlen(list[3])] = ':';
 544
 545       status << "pmerror:" << list[1]
 546              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 547              << ":" << list[3]
 548              << endl;
 549       if(OutStatusFd > 0)
 550          write(OutStatusFd, status.str().c_str(), status.str().size());
 551       if (Debug == true)
 552          std::clog << "send: '" << status.str() << "'" << endl;
 553       pkgFailures++;
 554       WriteApportReport(list[1], list[3]);
 555       return;
 556    }
 557    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 558    {
 559       status << "pmconffile:" << list[1]
 560              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 561              << ":" << list[3]
 562              << endl;
 563       if(OutStatusFd > 0)
 564          write(OutStatusFd, status.str().c_str(), status.str().size());
 565       if (Debug == true)
 566          std::clog << "send: '" << status.str() << "'" << endl;
 567       return;
 568    }
 569
 570    vector<struct DpkgState> const &states = PackageOps[pkg];
 571    const char *next_action = NULL;
 572    if(PackageOpsDone[pkg] < states.size())
 573       next_action = states[PackageOpsDone[pkg]].state;
 574    // check if the package moved to the next dpkg state
 575    if(next_action && (strcmp(action, next_action) == 0))
 576    {
 577       // only read the translation if there is actually a next
 578       // action
 579       const char *translation = _(states[PackageOpsDone[pkg]].str);
 580       char s[200];
 581       snprintf(s, sizeof(s), translation, pkg);
 582
 583       // we moved from one dpkg state to a new one, report that
 584       PackageOpsDone[pkg]++;
 585       PackagesDone++;
 586       // build the status str
 587       status << "pmstatus:" << pkg
 588              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 589              << ":" << s
 590              << endl;
 591       if(OutStatusFd > 0)
 592          write(OutStatusFd, status.str().c_str(), status.str().size());
 593       if (Debug == true)
 594          std::clog << "send: '" << status.str() << "'" << endl;
 595    }
 596    if (Debug == true)
 597       std::clog << "(parsed from dpkg) pkg: " << pkg
 598                 << " action: " << action << endl;
 599 }
 600                                                                         /*}}}*/
 601 // DPkgPM::handleDisappearAction                                        /*{{{*/
 602 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 603 {
 604    // record the package name for display and stuff later
 605    disappearedPkgs.insert(pkgname);
 606
 607    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 608    if (unlikely(Pkg.end() == true))
 609       return;
 610    // the disappeared package was auto-installed - nothing to do
 611    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 612       return;
 613    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 614    if (unlikely(PkgVer.end() == true))
 615       return;
 616    /* search in the list of dependencies for (Pre)Depends,
 617       check if this dependency has a Replaces on our package
 618       and if so transfer the manual installed flag to it */
 619    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 620    {
 621       if (Dep->Type != pkgCache::Dep::Depends &&
 622           Dep->Type != pkgCache::Dep::PreDepends)
 623          continue;
 624       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 625       if (unlikely(Tar.end() == true))
 626          continue;
 627       // the package is already marked as manual
 628       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 629          continue;
 630       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 631       if (TarVer.end() == true)
 632          continue;
 633       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 634       {
 635          if (Rep->Type != pkgCache::Dep::Replaces)
 636             continue;
 637          if (Pkg != Rep.TargetPkg())
 638             continue;
 639          // okay, they are strongly connected - transfer manual-bit
 640          if (Debug == true)
 641             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 642          Cache[Tar].Flags &= ~Flag::Auto;
 643          break;
 644       }
 645    }
 646 }
 647                                                                         /*}}}*/
 648 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 649 // ---------------------------------------------------------------------
 650 /*
 651  */
 652 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 653 {
 654    char *p, *q;
 655    int len;
 656
 657    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 658    d->dpkgbuf_pos += len;
 659    if(len <= 0)
 660       return;
 661
 662    // process line by line if we have a buffer
 663    p = q = d->dpkgbuf;
 664    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 665    {
 666       *q = 0;
 667       ProcessDpkgStatusLine(OutStatusFd, p);
 668       p=q+1; // continue with next line
 669    }
 670
 671    // now move the unprocessed bits (after the final \n that is now a 0x0)
 672    // to the start and update d->dpkgbuf_pos
 673    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 674    if(p == NULL)
 675       return;
 676
 677    // we are interessted in the first char *after* 0x0
 678    p++;
 679
 680    // move the unprocessed tail to the start and update pos
 681    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 682    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 683 }
 684                                                                         /*}}}*/
 685 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 686 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 687 {
 688    size_t const length = value.length();
 689    if (length == 0)
 690       return;
 691    // poor mans rstrip(", ")
 692    if (value[length-2] == ',' && value[length-1] == ' ')
 693       value.erase(length - 2, 2);
 694    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 695 }                                                                       /*}}}*/
 696 // DPkgPM::OpenLog                                                      /*{{{*/
 697 bool pkgDPkgPM::OpenLog()
 698 {
 699    string const logdir = _config->FindDir("Dir::Log");
 700    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 701       // FIXME: use a better string after freeze
 702       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 703
 704    // get current time
 705    char timestr[200];
 706    time_t const t = time(NULL);
 707    struct tm const * const tmp = localtime(&t);
 708    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 709
 710    // open terminal log
 711    string const logfile_name = flCombine(logdir,
 712                                    _config->Find("Dir::Log::Terminal"));
 713    if (!logfile_name.empty())
 714    {
 715       d->term_out = fopen(logfile_name.c_str(),"a");
 716       if (d->term_out == NULL)
 717          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 718       setvbuf(d->term_out, NULL, _IONBF, 0);
 719       SetCloseExec(fileno(d->term_out), true);
 720       struct passwd *pw;
 721       struct group *gr;
 722       pw = getpwnam("root");
 723       gr = getgrnam("adm");
 724       if (pw != NULL && gr != NULL)
 725           chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid);
 726       chmod(logfile_name.c_str(), 0644);
 727       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 728    }
 729
 730    // write your history
 731    string const history_name = flCombine(logdir,
 732                                    _config->Find("Dir::Log::History"));
 733    if (!history_name.empty())
 734    {
 735       d->history_out = fopen(history_name.c_str(),"a");
 736       if (d->history_out == NULL)
 737          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 738       chmod(history_name.c_str(), 0644);
 739       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 740       string remove, purge, install, reinstall, upgrade, downgrade;
 741       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 742       {
 743          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 744          string *line = NULL;
 745          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 746          if (Cache[I].NewInstall() == true)
 747             HISTORYINFO(install, CANDIDATE_AUTO)
 748          else if (Cache[I].ReInstall() == true)
 749             HISTORYINFO(reinstall, CANDIDATE)
 750          else if (Cache[I].Upgrade() == true)
 751             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 752          else if (Cache[I].Downgrade() == true)
 753             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 754          else if (Cache[I].Delete() == true)
 755             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 756          else
 757             continue;
 758          #undef HISTORYINFO
 759          line->append(I.FullName(false)).append(" (");
 760          switch (infostring) {
 761          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 762          case CANDIDATE_AUTO:
 763             line->append(Cache[I].CandVersion);
 764             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 765                line->append(", automatic");
 766             break;
 767          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 768          case CURRENT: line->append(Cache[I].CurVersion); break;
 769          }
 770          line->append("), ");
 771       }
 772       if (_config->Exists("Commandline::AsString") == true)
 773          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 774       WriteHistoryTag("Install", install);
 775       WriteHistoryTag("Reinstall", reinstall);
 776       WriteHistoryTag("Upgrade", upgrade);
 777       WriteHistoryTag("Downgrade",downgrade);
 778       WriteHistoryTag("Remove",remove);
 779       WriteHistoryTag("Purge",purge);
 780       fflush(d->history_out);
 781    }
 782
 783    return true;
 784 }
 785                                                                         /*}}}*/
 786 // DPkg::CloseLog                                                       /*{{{*/
 787 bool pkgDPkgPM::CloseLog()
 788 {
 789    char timestr[200];
 790    time_t t = time(NULL);
 791    struct tm *tmp = localtime(&t);
 792    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 793
 794    if(d->term_out)
 795    {
 796       fprintf(d->term_out, "Log ended: ");
 797       fprintf(d->term_out, "%s", timestr);
 798       fprintf(d->term_out, "\n");
 799       fclose(d->term_out);
 800    }
 801    d->term_out = NULL;
 802
 803    if(d->history_out)
 804    {
 805       if (disappearedPkgs.empty() == false)
 806       {
 807          string disappear;
 808          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 809               d != disappearedPkgs.end(); ++d)
 810          {
 811             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 812             disappear.append(*d);
 813             if (P.end() == true)
 814                disappear.append(", ");
 815             else
 816                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 817          }
 818          WriteHistoryTag("Disappeared", disappear);
 819       }
 820       if (d->dpkg_error.empty() == false)
 821          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 822       fprintf(d->history_out, "End-Date: %s\n", timestr);
 823       fclose(d->history_out);
 824    }
 825    d->history_out = NULL;
 826
 827    return true;
 828 }
 829                                                                         /*}}}*/
 830 /*{{{*/
 831 // This implements a racy version of pselect for those architectures
 832 // that don't have a working implementation.
 833 // FIXME: Probably can be removed on Lenny+1
 834 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 835    fd_set *exceptfds, const struct timespec *timeout,
 836    const sigset_t *sigmask)
 837 {
 838    sigset_t origmask;
 839    struct timeval tv;
 840    int retval;
 841
 842    tv.tv_sec = timeout->tv_sec;
 843    tv.tv_usec = timeout->tv_nsec/1000;
 844
 845    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 846    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 847    sigprocmask(SIG_SETMASK, &origmask, 0);
 848    return retval;
 849 }
 850 /*}}}*/
 851 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 852 // ---------------------------------------------------------------------
 853 /* This globs the operations and calls dpkg
 854  *
 855  * If it is called with "OutStatusFd" set to a valid file descriptor
 856  * apt will report the install progress over this fd. It maps the
 857  * dpkg states a package goes through to human readable (and i10n-able)
 858  * names and calculates a percentage for each step.
 859 */
 860 bool pkgDPkgPM::Go(int OutStatusFd)
 861 {
 862    // Generate the base argument list for dpkg
 863    std::vector<const char *> Args;
 864    unsigned long StartSize = 0;
 865    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 866    {
 867       string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 868       size_t dpkgChrootLen = dpkgChrootDir.length();
 869       if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 870       {
 871          if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 872             --dpkgChrootLen;
 873          Tmp = Tmp.substr(dpkgChrootLen);
 874       }
 875    }
 876    Args.push_back(Tmp.c_str());
 877    StartSize += Tmp.length();
 878
 879    // Stick in any custom dpkg options
 880    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 881    if (Opts != 0)
 882    {
 883       Opts = Opts->Child;
 884       for (; Opts != 0; Opts = Opts->Next)
 885       {
 886          if (Opts->Value.empty() == true)
 887             continue;
 888          Args.push_back(Opts->Value.c_str());
 889          StartSize += Opts->Value.length();
 890       }
 891    }
 892
 893    size_t const BaseArgs = Args.size();
 894    // we need to detect if we can qualify packages with the architecture or not
 895    Args.push_back("--assert-multi-arch");
 896    Args.push_back(NULL);
 897
 898    pid_t dpkgAssertMultiArch = ExecFork();
 899    if (dpkgAssertMultiArch == 0)
 900    {
 901       dpkgChrootDirectory();
 902       // redirect everything to the ultimate sink as we only need the exit-status
 903       int const nullfd = open("/dev/null", O_RDONLY);
 904       dup2(nullfd, STDIN_FILENO);
 905       dup2(nullfd, STDOUT_FILENO);
 906       dup2(nullfd, STDERR_FILENO);
 907       execv(Args[0], (char**) &Args[0]);
 908       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
 909       _exit(2);
 910    }
 911
 912    fd_set rfds;
 913    struct timespec tv;
 914    sigset_t sigmask;
 915    sigset_t original_sigmask;
 916
 917    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 918    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 919    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 920
 921    if (RunScripts("DPkg::Pre-Invoke") == false)
 922       return false;
 923
 924    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 925       return false;
 926
 927    // support subpressing of triggers processing for special
 928    // cases like d-i that runs the triggers handling manually
 929    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 930    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 931    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 932       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 933
 934    // map the dpkg states to the operations that are performed
 935    // (this is sorted in the same way as Item::Ops)
 936    static const struct DpkgState DpkgStatesOpMap[][7] = {
 937       // Install operation
 938       {
 939          {"half-installed", N_("Preparing %s")},
 940          {"unpacked", N_("Unpacking %s") },
 941          {NULL, NULL}
 942       },
 943       // Configure operation
 944       {
 945          {"unpacked",N_("Preparing to configure %s") },
 946          {"half-configured", N_("Configuring %s") },
 947          { "installed", N_("Installed %s")},
 948          {NULL, NULL}
 949       },
 950       // Remove operation
 951       {
 952          {"half-configured", N_("Preparing for removal of %s")},
 953          {"half-installed", N_("Removing %s")},
 954          {"config-files",  N_("Removed %s")},
 955          {NULL, NULL}
 956       },
 957       // Purge operation
 958       {
 959          {"config-files", N_("Preparing to completely remove %s")},
 960          {"not-installed", N_("Completely removed %s")},
 961          {NULL, NULL}
 962       },
 963    };
 964
 965    // init the PackageOps map, go over the list of packages that
 966    // that will be [installed|configured|removed|purged] and add
 967    // them to the PackageOps map (the dpkg states it goes through)
 968    // and the PackageOpsTranslations (human readable strings)
 969    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
 970    {
 971       if((*I).Pkg.end() == true)
 972          continue;
 973
 974       string const name = (*I).Pkg.Name();
 975       PackageOpsDone[name] = 0;
 976       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
 977       {
 978          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 979          PackagesTotal++;
 980       }
 981    }
 982
 983    d->stdin_is_dev_null = false;
 984
 985    // create log
 986    OpenLog();
 987
 988    bool dpkgMultiArch = false;
 989    if (dpkgAssertMultiArch > 0)
 990    {
 991       int Status = 0;
 992       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
 993       {
 994          if (errno == EINTR)
 995             continue;
 996          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
 997          break;
 998       }
 999       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1000          dpkgMultiArch = true;
1001    }
1002
1003    // this loop is runs once per operation
1004    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
1005    {
1006       // Do all actions with the same Op in one run
1007       vector<Item>::const_iterator J = I;
1008       if (TriggersPending == true)
1009          for (; J != List.end(); ++J)
1010          {
1011             if (J->Op == I->Op)
1012                continue;
1013             if (J->Op != Item::TriggersPending)
1014                break;
1015             vector<Item>::const_iterator T = J + 1;
1016             if (T != List.end() && T->Op == I->Op)
1017                continue;
1018             break;
1019          }
1020       else
1021          for (; J != List.end() && J->Op == I->Op; ++J)
1022             /* nothing */;
1023
1024       // keep track of allocated strings for multiarch package names
1025       std::vector<char *> Packages;
1026
1027       // start with the baseset of arguments
1028       unsigned long Size = StartSize;
1029       Args.erase(Args.begin() + BaseArgs, Args.end());
1030
1031       // Now check if we are within the MaxArgs limit
1032       //
1033       // this code below is problematic, because it may happen that
1034       // the argument list is split in a way that A depends on B
1035       // and they are in the same "--configure A B" run
1036       // - with the split they may now be configured in different
1037       //   runs, using Immediate-Configure-All can help prevent this.
1038       if (J - I > (signed)MaxArgs)
1039       {
1040          J = I + MaxArgs;
1041          unsigned long const size = MaxArgs + 10;
1042          Args.reserve(size);
1043          Packages.reserve(size);
1044       }
1045       else
1046       {
1047          unsigned long const size = (J - I) + 10;
1048          Args.reserve(size);
1049          Packages.reserve(size);
1050       }
1051
1052       int fd[2];
1053       pipe(fd);
1054
1055 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1056 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1057
1058       ADDARGC("--status-fd");
1059       char status_fd_buf[20];
1060       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1061       ADDARG(status_fd_buf);
1062       unsigned long const Op = I->Op;
1063
1064       switch (I->Op)
1065       {
1066          case Item::Remove:
1067          ADDARGC("--force-depends");
1068          ADDARGC("--force-remove-essential");
1069          ADDARGC("--remove");
1070          break;
1071
1072          case Item::Purge:
1073          ADDARGC("--force-depends");
1074          ADDARGC("--force-remove-essential");
1075          ADDARGC("--purge");
1076          break;
1077
1078          case Item::Configure:
1079          ADDARGC("--configure");
1080          break;
1081
1082          case Item::ConfigurePending:
1083          ADDARGC("--configure");
1084          ADDARGC("--pending");
1085          break;
1086
1087          case Item::TriggersPending:
1088          ADDARGC("--triggers-only");
1089          ADDARGC("--pending");
1090          break;
1091
1092          case Item::Install:
1093          ADDARGC("--unpack");
1094          ADDARGC("--auto-deconfigure");
1095          break;
1096       }
1097
1098       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1099           I->Op != Item::ConfigurePending)
1100       {
1101          ADDARGC("--no-triggers");
1102       }
1103 #undef ADDARGC
1104
1105       // Write in the file or package names
1106       if (I->Op == Item::Install)
1107       {
1108          for (;I != J && Size < MaxArgBytes; ++I)
1109          {
1110             if (I->File[0] != '/')
1111                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1112             Args.push_back(I->File.c_str());
1113             Size += I->File.length();
1114          }
1115       }
1116       else
1117       {
1118          string const nativeArch = _config->Find("APT::Architecture");
1119          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1120          for (;I != J && Size < MaxArgBytes; ++I)
1121          {
1122             if((*I).Pkg.end() == true)
1123                continue;
1124             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1125                continue;
1126             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1127             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch || !strcmp(I->Pkg.Arch(), "all")))
1128             {
1129                char const * const name = I->Pkg.Name();
1130                ADDARG(name);
1131             }
1132             else
1133             {
1134                pkgCache::VerIterator PkgVer;
1135                std::string name = I->Pkg.Name();
1136                if (Op == Item::Remove || Op == Item::Purge)
1137                {
1138                   PkgVer = I->Pkg.CurrentVer();
1139                   if(PkgVer.end() == true)
1140                      PkgVer = FindNowVersion(I->Pkg);
1141                }
1142                else
1143                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1144                if (PkgVer.end() == false)
1145                   name.append(":").append(PkgVer.Arch());
1146                else
1147                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1148                char * const fullname = strdup(name.c_str());
1149                Packages.push_back(fullname);
1150                ADDARG(fullname);
1151             }
1152          }
1153          // skip configure action if all sheduled packages disappeared
1154          if (oldSize == Size)
1155             continue;
1156       }
1157 #undef ADDARG
1158
1159       J = I;
1160
1161       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1162       {
1163          for (std::vector<const char *>::const_iterator a = Args.begin();
1164               a != Args.end(); ++a)
1165             clog << *a << ' ';
1166          clog << endl;
1167          continue;
1168       }
1169       Args.push_back(NULL);
1170
1171       cout << flush;
1172       clog << flush;
1173       cerr << flush;
1174
1175       /* Mask off sig int/quit. We do this because dpkg also does when
1176          it forks scripts. What happens is that when you hit ctrl-c it sends
1177          it to all processes in the group. Since dpkg ignores the signal
1178          it doesn't die but we do! So we must also ignore it */
1179       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1180       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1181
1182       // Check here for any SIGINT
1183       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1184          break;
1185
1186
1187       // ignore SIGHUP as well (debian #463030)
1188       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1189
1190       struct    termios tt;
1191       struct    winsize win;
1192       int       master = -1;
1193       int       slave = -1;
1194
1195       // if tcgetattr does not return zero there was a error
1196       // and we do not do any pty magic
1197       if (tcgetattr(0, &tt) == 0)
1198       {
1199          ioctl(0, TIOCGWINSZ, (char *)&win);
1200          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1201          {
1202             const char *s = _("Can not write log, openpty() "
1203                               "failed (/dev/pts not mounted?)\n");
1204             fprintf(stderr, "%s",s);
1205             if(d->term_out)
1206               fprintf(d->term_out, "%s",s);
1207             master = slave = -1;
1208          }  else {
1209             struct termios rtt;
1210             rtt = tt;
1211             cfmakeraw(&rtt);
1212             rtt.c_lflag &= ~ECHO;
1213             rtt.c_lflag |= ISIG;
1214             // block SIGTTOU during tcsetattr to prevent a hang if
1215             // the process is a member of the background process group
1216             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1217             sigemptyset(&sigmask);
1218             sigaddset(&sigmask, SIGTTOU);
1219             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1220             tcsetattr(0, TCSAFLUSH, &rtt);
1221             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1222          }
1223       }
1224        // Fork dpkg
1225       pid_t Child;
1226       _config->Set("APT::Keep-Fds::",fd[1]);
1227       // send status information that we are about to fork dpkg
1228       if(OutStatusFd > 0) {
1229          ostringstream status;
1230          status << "pmstatus:dpkg-exec:"
1231                 << (PackagesDone/float(PackagesTotal)*100.0)
1232                 << ":" << _("Running dpkg")
1233                 << endl;
1234          write(OutStatusFd, status.str().c_str(), status.str().size());
1235       }
1236       Child = ExecFork();
1237
1238       // This is the child
1239       if (Child == 0)
1240       {
1241          if(slave >= 0 && master >= 0)
1242          {
1243             setsid();
1244             ioctl(slave, TIOCSCTTY, 0);
1245             close(master);
1246             dup2(slave, 0);
1247             dup2(slave, 1);
1248             dup2(slave, 2);
1249             close(slave);
1250          }
1251          close(fd[0]); // close the read end of the pipe
1252
1253          dpkgChrootDirectory();
1254
1255          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1256             _exit(100);
1257
1258          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1259          {
1260             int Flags,dummy;
1261             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1262                _exit(100);
1263
1264             // Discard everything in stdin before forking dpkg
1265             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1266                _exit(100);
1267
1268             while (read(STDIN_FILENO,&dummy,1) == 1);
1269
1270             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1271                _exit(100);
1272          }
1273
1274          /* No Job Control Stop Env is a magic dpkg var that prevents it
1275             from using sigstop */
1276          putenv((char *)"DPKG_NO_TSTP=yes");
1277          execvp(Args[0], (char**) &Args[0]);
1278          cerr << "Could not exec dpkg!" << endl;
1279          _exit(100);
1280       }
1281
1282       // apply ionice
1283       if (_config->FindB("DPkg::UseIoNice", false) == true)
1284          ionice(Child);
1285
1286       // clear the Keep-Fd again
1287       _config->Clear("APT::Keep-Fds",fd[1]);
1288
1289       // Wait for dpkg
1290       int Status = 0;
1291
1292       // we read from dpkg here
1293       int const _dpkgin = fd[0];
1294       close(fd[1]);                        // close the write end of the pipe
1295
1296       if(slave > 0)
1297          close(slave);
1298
1299       // setups fds
1300       sigemptyset(&sigmask);
1301       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1302
1303       /* free vectors (and therefore memory) as we don't need the included data anymore */
1304       for (std::vector<char *>::const_iterator p = Packages.begin();
1305            p != Packages.end(); ++p)
1306          free(*p);
1307       Packages.clear();
1308
1309       // the result of the waitpid call
1310       int res;
1311       int select_ret;
1312       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1313          if(res < 0) {
1314             // FIXME: move this to a function or something, looks ugly here
1315             // error handling, waitpid returned -1
1316             if (errno == EINTR)
1317                continue;
1318             RunScripts("DPkg::Post-Invoke");
1319
1320             // Restore sig int/quit
1321             signal(SIGQUIT,old_SIGQUIT);
1322             signal(SIGINT,old_SIGINT);
1323
1324             signal(SIGHUP,old_SIGHUP);
1325             return _error->Errno("waitpid","Couldn't wait for subprocess");
1326          }
1327
1328          // wait for input or output here
1329          FD_ZERO(&rfds);
1330          if (master >= 0 && !d->stdin_is_dev_null)
1331             FD_SET(0, &rfds);
1332          FD_SET(_dpkgin, &rfds);
1333          if(master >= 0)
1334             FD_SET(master, &rfds);
1335          tv.tv_sec = 1;
1336          tv.tv_nsec = 0;
1337          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1338                               &tv, &original_sigmask);
1339          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1340             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1341                                       NULL, &tv, &original_sigmask);
1342          if (select_ret == 0)
1343             continue;
1344          else if (select_ret < 0 && errno == EINTR)
1345             continue;
1346          else if (select_ret < 0)
1347          {
1348             perror("select() returned error");
1349             continue;
1350          }
1351
1352          if(master >= 0 && FD_ISSET(master, &rfds))
1353             DoTerminalPty(master);
1354          if(master >= 0 && FD_ISSET(0, &rfds))
1355             DoStdin(master);
1356          if(FD_ISSET(_dpkgin, &rfds))
1357             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1358       }
1359       close(_dpkgin);
1360
1361       // Restore sig int/quit
1362       signal(SIGQUIT,old_SIGQUIT);
1363       signal(SIGINT,old_SIGINT);
1364
1365       signal(SIGHUP,old_SIGHUP);
1366
1367       if(master >= 0)
1368       {
1369          tcsetattr(0, TCSAFLUSH, &tt);
1370          close(master);
1371       }
1372
1373       // Check for an error code.
1374       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1375       {
1376          // if it was set to "keep-dpkg-runing" then we won't return
1377          // here but keep the loop going and just report it as a error
1378          // for later
1379          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1380
1381          if(stopOnError)
1382             RunScripts("DPkg::Post-Invoke");
1383
1384          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1385             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1386          else if (WIFEXITED(Status) != 0)
1387             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1388          else
1389             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1390
1391          if(d->dpkg_error.size() > 0)
1392             _error->Error("%s", d->dpkg_error.c_str());
1393
1394          if(stopOnError)
1395          {
1396             CloseLog();
1397             return false;
1398          }
1399       }
1400    }
1401    CloseLog();
1402
1403    if (pkgPackageManager::SigINTStop)
1404        _error->Warning(_("Operation was interrupted before it could finish"));
1405
1406    if (RunScripts("DPkg::Post-Invoke") == false)
1407       return false;
1408
1409    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1410    {
1411       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1412       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1413           unlink(oldpkgcache.c_str()) == 0)
1414       {
1415          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1416          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1417          {
1418             _error->PushToStack();
1419             pkgCacheFile CacheFile;
1420             CacheFile.BuildCaches(NULL, true);
1421             _error->RevertToStack();
1422          }
1423       }
1424    }
1425
1426    Cache.writeStateFile(NULL);
1427    return true;
1428 }
1429
1430 void SigINT(int sig) {
1431    if (_config->FindB("APT::Immediate-Configure-All",false))
1432       pkgPackageManager::SigINTStop = true;
1433 }
1434                                                                         /*}}}*/
1435 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1436 // ---------------------------------------------------------------------
1437 /* */
1438 void pkgDPkgPM::Reset()
1439 {
1440    List.erase(List.begin(),List.end());
1441 }
1442                                                                         /*}}}*/
1443 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1444 // ---------------------------------------------------------------------
1445 /* */
1446 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1447 {
1448    string pkgname, reportfile, srcpkgname, pkgver, arch;
1449    string::size_type pos;
1450    FILE *report;
1451
1452    if (_config->FindB("Dpkg::ApportFailureReport", true) == false)
1453    {
1454       std::clog << "configured to not write apport reports" << std::endl;
1455       return;
1456    }
1457
1458    // only report the first errors
1459    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1460    {
1461       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1462       return;
1463    }
1464
1465    // check if its not a follow up error
1466    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1467    if(strstr(errormsg, needle) != NULL) {
1468       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1469       return;
1470    }
1471
1472    // do not report disk-full failures
1473    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1474       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1475       return;
1476    }
1477
1478    // do not report out-of-memory failures
1479    if(strstr(errormsg, strerror(ENOMEM)) != NULL ||
1480       strstr(errormsg, "failed to allocate memory") != NULL) {
1481       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1482       return;
1483    }
1484
1485    // do not report bugs regarding inaccessible local files
1486    if(strstr(errormsg, strerror(ENOENT)) != NULL ||
1487       strstr(errormsg, "cannot access archive") != NULL) {
1488       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1489       return;
1490    }
1491
1492    // do not report errors encountered when decompressing packages
1493    if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) {
1494       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1495       return;
1496    }
1497
1498    // do not report dpkg I/O errors, this is a format string, so we compare
1499    // the prefix and the suffix of the error with the dpkg error message
1500    vector<string> io_errors;
1501    io_errors.push_back(string("failed to read on buffer copy for %s"));
1502    io_errors.push_back(string("failed in write on buffer copy for %s"));
1503    io_errors.push_back(string("short read on buffer copy for %s"));
1504
1505    for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); I++)
1506    {
1507       vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%');
1508       if (list.size() > 1) {
1509          // we need to split %s, VectorizeString only allows char so we need
1510          // to kill the "s" manually
1511          if (list[1].size() > 1) {
1512             list[1].erase(0, 1);
1513             if(strstr(errormsg, list[0].c_str()) &&
1514                strstr(errormsg, list[1].c_str())) {
1515                std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1516                return;
1517             }
1518          }
1519       }
1520    }
1521
1522    // get the pkgname and reportfile
1523    pkgname = flNotDir(pkgpath);
1524    pos = pkgname.find('_');
1525    if(pos != string::npos)
1526       pkgname = pkgname.substr(0, pos);
1527
1528    // find the package versin and source package name
1529    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1530    if (Pkg.end() == true)
1531       return;
1532    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1533    if (Ver.end() == true)
1534       return;
1535    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1536    pkgRecords Recs(Cache);
1537    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1538    srcpkgname = Parse.SourcePkg();
1539    if(srcpkgname.empty())
1540       srcpkgname = pkgname;
1541
1542    // if the file exists already, we check:
1543    // - if it was reported already (touched by apport).
1544    //   If not, we do nothing, otherwise
1545    //    we overwrite it. This is the same behaviour as apport
1546    // - if we have a report with the same pkgversion already
1547    //   then we skip it
1548    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1549    if(FileExists(reportfile))
1550    {
1551       struct stat buf;
1552       char strbuf[255];
1553
1554       // check atime/mtime
1555       stat(reportfile.c_str(), &buf);
1556       if(buf.st_mtime > buf.st_atime)
1557          return;
1558
1559       // check if the existing report is the same version
1560       report = fopen(reportfile.c_str(),"r");
1561       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1562       {
1563          if(strstr(strbuf,"Package:") == strbuf)
1564          {
1565             char pkgname[255], version[255];
1566             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
1567                if(strcmp(pkgver.c_str(), version) == 0)
1568                {
1569                   fclose(report);
1570                   return;
1571                }
1572          }
1573       }
1574       fclose(report);
1575    }
1576
1577    // now write the report
1578    arch = _config->Find("APT::Architecture");
1579    report = fopen(reportfile.c_str(),"w");
1580    if(report == NULL)
1581       return;
1582    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1583       chmod(reportfile.c_str(), 0);
1584    else
1585       chmod(reportfile.c_str(), 0600);
1586    fprintf(report, "ProblemType: Package\n");
1587    fprintf(report, "Architecture: %s\n", arch.c_str());
1588    time_t now = time(NULL);
1589    fprintf(report, "Date: %s" , ctime(&now));
1590    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1591    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1592    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1593
1594    // ensure that the log is flushed
1595    if(d->term_out)
1596       fflush(d->term_out);
1597
1598    // attach terminal log it if we have it
1599    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1600    if (!logfile_name.empty())
1601    {
1602       FILE *log = NULL;
1603       char buf[1024];
1604
1605       fprintf(report, "DpkgTerminalLog:\n");
1606       log = fopen(logfile_name.c_str(),"r");
1607       if(log != NULL)
1608       {
1609          while( fgets(buf, sizeof(buf), log) != NULL)
1610             fprintf(report, " %s", buf);
1611          fprintf(report, " \n");
1612          fclose(log);
1613       }
1614    }
1615
1616    // attach history log it if we have it
1617    string histfile_name = _config->FindFile("Dir::Log::History");
1618    if (!histfile_name.empty())
1619    {
1620       FILE *log = NULL;
1621       char buf[1024];
1622
1623       fprintf(report, "DpkgHistoryLog:\n");
1624       log = fopen(histfile_name.c_str(),"r");
1625       if(log != NULL)
1626       {
1627          while( fgets(buf, sizeof(buf), log) != NULL)
1628             fprintf(report, " %s", buf);
1629          fclose(log);
1630       }
1631    }
1632
1633    // log the ordering
1634    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1635    fprintf(report, "AptOrdering:\n");
1636    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1637       fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1638
1639    // attach dmesg log (to learn about segfaults)
1640    if (FileExists("/bin/dmesg"))
1641    {
1642       FILE *log = NULL;
1643       char buf[1024];
1644
1645       fprintf(report, "Dmesg:\n");
1646       log = popen("/bin/dmesg","r");
1647       if(log != NULL)
1648       {
1649          while( fgets(buf, sizeof(buf), log) != NULL)
1650             fprintf(report, " %s", buf);
1651          pclose(log);
1652       }
1653    }
1654
1655    // attach df -l log (to learn about filesystem status)
1656    if (FileExists("/bin/df"))
1657    {
1658       FILE *log = NULL;
1659       char buf[1024];
1660
1661       fprintf(report, "Df:\n");
1662       log = popen("/bin/df -l","r");
1663       if(log != NULL)
1664       {
1665          while( fgets(buf, sizeof(buf), log) != NULL)
1666             fprintf(report, " %s", buf);
1667          pclose(log);
1668       }
1669    }
1670
1671    fclose(report);
1672
1673 }
1674                                                                         /*}}}*/