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