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