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