apt-pkg/deb/dpkgpm.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
   4 /* ######################################################################
   5
   6    DPKG Package Manager - Provide an interface to dpkg
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include <config.h>
  12
  13 #include <apt-pkg/dpkgpm.h>
  14 #include <apt-pkg/error.h>
  15 #include <apt-pkg/configuration.h>
  16 #include <apt-pkg/depcache.h>
  17 #include <apt-pkg/pkgrecords.h>
  18 #include <apt-pkg/strutl.h>
  19 #include <apt-pkg/fileutl.h>
  20 #include <apt-pkg/cachefile.h>
  21 #include <apt-pkg/packagemanager.h>
  22
  23 #include <unistd.h>
  24 #include <stdlib.h>
  25 #include <fcntl.h>
  26 #include <sys/select.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <sys/wait.h>
  30 #include <signal.h>
  31 #include <errno.h>
  32 #include <string.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <algorithm>
  36 #include <sstream>
  37 #include <map>
  38 #include <pwd.h>
  39 #include <grp.h>
  40
  41 #include <termios.h>
  42 #include <unistd.h>
  43 #include <sys/ioctl.h>
  44 #include <pty.h>
  45
  46 #include <apti18n.h>
  47                                                                         /*}}}*/
  48
  49 using namespace std;
  50
  51 class pkgDPkgPMPrivate
  52 {
  53 public:
  54    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  55                         term_out(NULL), history_out(NULL)
  56    {
  57       dpkgbuf[0] = '\0';
  58    }
  59    bool stdin_is_dev_null;
  60    // the buffer we use for the dpkg status-fd reading
  61    char dpkgbuf[1024];
  62    int dpkgbuf_pos;
  63    FILE *term_out;
  64    FILE *history_out;
  65    string dpkg_error;
  66 };
  67
  68 namespace
  69 {
  70   // Maps the dpkg "processing" info to human readable names.  Entry 0
  71   // of each array is the key, entry 1 is the value.
  72   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  73     std::make_pair("install",   N_("Installing %s")),
  74     std::make_pair("configure", N_("Configuring %s")),
  75     std::make_pair("remove",    N_("Removing %s")),
  76     std::make_pair("purge",    N_("Completely removing %s")),
  77     std::make_pair("disappear", N_("Noting disappearance of %s")),
  78     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  79   };
  80
  81   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  82   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  83
  84   // Predicate to test whether an entry in the PackageProcessingOps
  85   // array matches a string.
  86   class MatchProcessingOp
  87   {
  88     const char *target;
  89
  90   public:
  91     MatchProcessingOp(const char *the_target)
  92       : target(the_target)
  93     {
  94     }
  95
  96     bool operator()(const std::pair<const char *, const char *> &pair) const
  97     {
  98       return strcmp(pair.first, target) == 0;
  99     }
 100   };
 101 }
 102
 103 /* helper function to ionice the given PID
 104
 105  there is no C header for ionice yet - just the syscall interface
 106  so we use the binary from util-linux
 107 */
 108 static bool
 109 ionice(int PID)
 110 {
 111    if (!FileExists("/usr/bin/ionice"))
 112       return false;
 113    pid_t Process = ExecFork();
 114    if (Process == 0)
 115    {
 116       char buf[32];
 117       snprintf(buf, sizeof(buf), "-p%d", PID);
 118       const char *Args[4];
 119       Args[0] = "/usr/bin/ionice";
 120       Args[1] = "-c3";
 121       Args[2] = buf;
 122       Args[3] = 0;
 123       execv(Args[0], (char **)Args);
 124    }
 125    return ExecWait(Process, "ionice");
 126 }
 127
 128 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 129 static void dpkgChrootDirectory()
 130 {
 131    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 132    if (chrootDir == "/")
 133       return;
 134    std::cerr << "Chrooting into " << chrootDir << std::endl;
 135    if (chroot(chrootDir.c_str()) != 0)
 136       _exit(100);
 137    if (chdir("/") != 0)
 138       _exit(100);
 139 }
 140                                                                         /*}}}*/
 141
 142
 143 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 144 // ---------------------------------------------------------------------
 145 /* This is helpful when a package is no longer installed but has residual
 146  * config files
 147  */
 148 static
 149 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 150 {
 151    pkgCache::VerIterator Ver;
 152    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 153    {
 154       pkgCache::VerFileIterator Vf = Ver.FileList();
 155       pkgCache::PkgFileIterator F = Vf.File();
 156       for (F = Vf.File(); F.end() == false; ++F)
 157       {
 158          if (F && F.Archive())
 159          {
 160             if (strcmp(F.Archive(), "now"))
 161                return Ver;
 162          }
 163       }
 164    }
 165    return Ver;
 166 }
 167                                                                         /*}}}*/
 168
 169 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 170 // ---------------------------------------------------------------------
 171 /* */
 172 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 173    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 174 {
 175    d = new pkgDPkgPMPrivate();
 176 }
 177                                                                         /*}}}*/
 178 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 179 // ---------------------------------------------------------------------
 180 /* */
 181 pkgDPkgPM::~pkgDPkgPM()
 182 {
 183    delete d;
 184 }
 185                                                                         /*}}}*/
 186 // DPkgPM::Install - Install a package                                  /*{{{*/
 187 // ---------------------------------------------------------------------
 188 /* Add an install operation to the sequence list */
 189 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 190 {
 191    if (File.empty() == true || Pkg.end() == true)
 192       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 193
 194    // If the filename string begins with DPkg::Chroot-Directory, return the
 195    // substr that is within the chroot so dpkg can access it.
 196    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 197    if (chrootdir != "/" && File.find(chrootdir) == 0)
 198    {
 199       size_t len = chrootdir.length();
 200       if (chrootdir.at(len - 1) == '/')
 201         len--;
 202       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 203    }
 204    else
 205       List.push_back(Item(Item::Install,Pkg,File));
 206
 207    return true;
 208 }
 209                                                                         /*}}}*/
 210 // DPkgPM::Configure - Configure a package                              /*{{{*/
 211 // ---------------------------------------------------------------------
 212 /* Add a configure operation to the sequence list */
 213 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 214 {
 215    if (Pkg.end() == true)
 216       return false;
 217
 218    List.push_back(Item(Item::Configure, Pkg));
 219
 220    // Use triggers for config calls if we configure "smart"
 221    // as otherwise Pre-Depends will not be satisfied, see #526774
 222    if (_config->FindB("DPkg::TriggersPending", false) == true)
 223       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 224
 225    return true;
 226 }
 227                                                                         /*}}}*/
 228 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 229 // ---------------------------------------------------------------------
 230 /* Add a remove operation to the sequence list */
 231 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 232 {
 233    if (Pkg.end() == true)
 234       return false;
 235
 236    if (Purge == true)
 237       List.push_back(Item(Item::Purge,Pkg));
 238    else
 239       List.push_back(Item(Item::Remove,Pkg));
 240    return true;
 241 }
 242                                                                         /*}}}*/
 243 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 244 // ---------------------------------------------------------------------
 245 /* This is part of the helper script communication interface, it sends
 246    very complete information down to the other end of the pipe.*/
 247 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 248 {
 249    return SendPkgsInfo(F, 2);
 250 }
 251 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 252 {
 253    // This version of APT supports only v3, so don't sent higher versions
 254    if (Version <= 3)
 255       fprintf(F,"VERSION %u\n", Version);
 256    else
 257       fprintf(F,"VERSION 3\n");
 258
 259    /* Write out all of the configuration directives by walking the
 260       configuration tree */
 261    const Configuration::Item *Top = _config->Tree(0);
 262    for (; Top != 0;)
 263    {
 264       if (Top->Value.empty() == false)
 265       {
 266          fprintf(F,"%s=%s\n",
 267                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 268                  QuoteString(Top->Value,"\n").c_str());
 269       }
 270
 271       if (Top->Child != 0)
 272       {
 273          Top = Top->Child;
 274          continue;
 275       }
 276
 277       while (Top != 0 && Top->Next == 0)
 278          Top = Top->Parent;
 279       if (Top != 0)
 280          Top = Top->Next;
 281    }
 282    fprintf(F,"\n");
 283
 284    // Write out the package actions in order.
 285    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 286    {
 287       if(I->Pkg.end() == true)
 288          continue;
 289
 290       pkgDepCache::StateCache &S = Cache[I->Pkg];
 291
 292       fprintf(F,"%s ",I->Pkg.Name());
 293
 294       // Current version which we are going to replace
 295       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 296       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 297          CurVer = FindNowVersion(I->Pkg);
 298
 299       if (CurVer.end() == true)
 300       {
 301          if (Version <= 2)
 302             fprintf(F, "- ");
 303          else
 304             fprintf(F, "- - none ");
 305       }
 306       else
 307       {
 308          fprintf(F, "%s ", CurVer.VerStr());
 309          if (Version >= 3)
 310             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 311       }
 312
 313       // Show the compare operator between current and install version
 314       if (S.InstallVer != 0)
 315       {
 316          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 317          int Comp = 2;
 318          if (CurVer.end() == false)
 319             Comp = InstVer.CompareVer(CurVer);
 320          if (Comp < 0)
 321             fprintf(F,"> ");
 322          else if (Comp == 0)
 323             fprintf(F,"= ");
 324          else if (Comp > 0)
 325             fprintf(F,"< ");
 326          fprintf(F, "%s ", InstVer.VerStr());
 327          if (Version >= 3)
 328             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 329       }
 330       else
 331       {
 332          if (Version <= 2)
 333             fprintf(F, "> - ");
 334          else
 335             fprintf(F, "> - - none ");
 336       }
 337
 338       // Show the filename/operation
 339       if (I->Op == Item::Install)
 340       {
 341          // No errors here..
 342          if (I->File[0] != '/')
 343             fprintf(F,"**ERROR**\n");
 344          else
 345             fprintf(F,"%s\n",I->File.c_str());
 346       }
 347       else if (I->Op == Item::Configure)
 348          fprintf(F,"**CONFIGURE**\n");
 349       else if (I->Op == Item::Remove ||
 350           I->Op == Item::Purge)
 351          fprintf(F,"**REMOVE**\n");
 352
 353       if (ferror(F) != 0)
 354          return false;
 355    }
 356    return true;
 357 }
 358                                                                         /*}}}*/
 359 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 360 // ---------------------------------------------------------------------
 361 /* This looks for a list of scripts to run from the configuration file
 362    each one is run and is fed on standard input a list of all .deb files
 363    that are due to be installed. */
 364 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 365 {
 366    Configuration::Item const *Opts = _config->Tree(Cnf);
 367    if (Opts == 0 || Opts->Child == 0)
 368       return true;
 369    Opts = Opts->Child;
 370
 371    unsigned int Count = 1;
 372    for (; Opts != 0; Opts = Opts->Next, Count++)
 373    {
 374       if (Opts->Value.empty() == true)
 375          continue;
 376
 377       // Determine the protocol version
 378       string OptSec = Opts->Value;
 379       string::size_type Pos;
 380       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 381          Pos = OptSec.length();
 382       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 383
 384       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 385
 386       // Create the pipes
 387       int Pipes[2];
 388       if (pipe(Pipes) != 0)
 389          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 390       SetCloseExec(Pipes[0],true);
 391       SetCloseExec(Pipes[1],true);
 392
 393       // Purified Fork for running the script
 394       pid_t Process = ExecFork();
 395       if (Process == 0)
 396       {
 397          // Setup the FDs
 398          dup2(Pipes[0],STDIN_FILENO);
 399          SetCloseExec(STDOUT_FILENO,false);
 400          SetCloseExec(STDIN_FILENO,false);
 401          SetCloseExec(STDERR_FILENO,false);
 402
 403          dpkgChrootDirectory();
 404          const char *Args[4];
 405          Args[0] = "/bin/sh";
 406          Args[1] = "-c";
 407          Args[2] = Opts->Value.c_str();
 408          Args[3] = 0;
 409          execv(Args[0],(char **)Args);
 410          _exit(100);
 411       }
 412       close(Pipes[0]);
 413       FILE *F = fdopen(Pipes[1],"w");
 414       if (F == 0)
 415          return _error->Errno("fdopen","Faild to open new FD");
 416
 417       // Feed it the filenames.
 418       if (Version <= 1)
 419       {
 420          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 421          {
 422             // Only deal with packages to be installed from .deb
 423             if (I->Op != Item::Install)
 424                continue;
 425
 426             // No errors here..
 427             if (I->File[0] != '/')
 428                continue;
 429
 430             /* Feed the filename of each package that is pending install
 431                into the pipe. */
 432             fprintf(F,"%s\n",I->File.c_str());
 433             if (ferror(F) != 0)
 434                break;
 435          }
 436       }
 437       else
 438          SendPkgsInfo(F, Version);
 439
 440       fclose(F);
 441
 442       // Clean up the sub process
 443       if (ExecWait(Process,Opts->Value.c_str()) == false)
 444          return _error->Error("Failure running script %s",Opts->Value.c_str());
 445    }
 446
 447    return true;
 448 }
 449                                                                         /*}}}*/
 450 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 451 // ---------------------------------------------------------------------
 452 /*
 453 */
 454 void pkgDPkgPM::DoStdin(int master)
 455 {
 456    unsigned char input_buf[256] = {0,};
 457    ssize_t len = read(0, input_buf, sizeof(input_buf));
 458    if (len)
 459       FileFd::Write(master, input_buf, len);
 460    else
 461       d->stdin_is_dev_null = true;
 462 }
 463                                                                         /*}}}*/
 464 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 465 // ---------------------------------------------------------------------
 466 /*
 467  * read the terminal pty and write log
 468  */
 469 void pkgDPkgPM::DoTerminalPty(int master)
 470 {
 471    unsigned char term_buf[1024] = {0,0, };
 472
 473    ssize_t len=read(master, term_buf, sizeof(term_buf));
 474    if(len == -1 && errno == EIO)
 475    {
 476       // this happens when the child is about to exit, we
 477       // give it time to actually exit, otherwise we run
 478       // into a race so we sleep for half a second.
 479       struct timespec sleepfor = { 0, 500000000 };
 480       nanosleep(&sleepfor, NULL);
 481       return;
 482    }
 483    if(len <= 0)
 484       return;
 485    FileFd::Write(1, term_buf, len);
 486    if(d->term_out)
 487       fwrite(term_buf, len, sizeof(char), d->term_out);
 488 }
 489                                                                         /*}}}*/
 490 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 491 // ---------------------------------------------------------------------
 492 /*
 493  */
 494 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 495 {
 496    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 497    // the status we output
 498    ostringstream status;
 499
 500    if (Debug == true)
 501       std::clog << "got from dpkg '" << line << "'" << std::endl;
 502
 503
 504    /* dpkg sends strings like this:
 505       'status:   <pkg>:  <pkg  qstate>'
 506       errors look like this:
 507       '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
 508       and conffile-prompt like this
 509       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 510
 511       Newer versions of dpkg sent also:
 512       'processing: install: pkg'
 513       'processing: configure: pkg'
 514       'processing: remove: pkg'
 515       'processing: purge: pkg'
 516       'processing: disappear: pkg'
 517       'processing: trigproc: trigger'
 518
 519    */
 520    char* list[6];
 521    //        dpkg sends multiline error messages sometimes (see
 522    //        #374195 for a example. we should support this by
 523    //        either patching dpkg to not send multiline over the
 524    //        statusfd or by rewriting the code here to deal with
 525    //        it. for now we just ignore it and not crash
 526    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 527    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 528    {
 529       if (Debug == true)
 530          std::clog << "ignoring line: not enough ':'" << std::endl;
 531       return;
 532    }
 533    const char* const pkg = list[1];
 534    const char* action = _strstrip(list[2]);
 535
 536    // 'processing' from dpkg looks like
 537    // 'processing: action: pkg'
 538    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 539    {
 540       char s[200];
 541       const char* const pkg_or_trigger = _strstrip(list[2]);
 542       action = _strstrip( list[1]);
 543       const std::pair<const char *, const char *> * const iter =
 544         std::find_if(PackageProcessingOpsBegin,
 545                      PackageProcessingOpsEnd,
 546                      MatchProcessingOp(action));
 547       if(iter == PackageProcessingOpsEnd)
 548       {
 549          if (Debug == true)
 550             std::clog << "ignoring unknown action: " << action << std::endl;
 551          return;
 552       }
 553       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 554
 555       status << "pmstatus:" << pkg_or_trigger
 556              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 557              << ":" << s
 558              << endl;
 559       if(OutStatusFd > 0)
 560          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 561       if (Debug == true)
 562          std::clog << "send: '" << status.str() << "'" << endl;
 563
 564       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 565          handleDisappearAction(pkg_or_trigger);
 566       return;
 567    }
 568
 569    if(strncmp(action,"error",strlen("error")) == 0)
 570    {
 571       // urgs, sometime has ":" in its error string so that we
 572       // end up with the error message split between list[3]
 573       // and list[4], e.g. the message:
 574       // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 575       // concat them again
 576       if( list[4] != NULL )
 577          list[3][strlen(list[3])] = ':';
 578
 579       status << "pmerror:" << list[1]
 580              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 581              << ":" << list[3]
 582              << endl;
 583       if(OutStatusFd > 0)
 584          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 585       if (Debug == true)
 586          std::clog << "send: '" << status.str() << "'" << endl;
 587       pkgFailures++;
 588       WriteApportReport(list[1], list[3]);
 589       return;
 590    }
 591    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 592    {
 593       status << "pmconffile:" << list[1]
 594              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 595              << ":" << list[3]
 596              << endl;
 597       if(OutStatusFd > 0)
 598          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 599       if (Debug == true)
 600          std::clog << "send: '" << status.str() << "'" << endl;
 601       return;
 602    }
 603
 604    vector<struct DpkgState> const &states = PackageOps[pkg];
 605    const char *next_action = NULL;
 606    if(PackageOpsDone[pkg] < states.size())
 607       next_action = states[PackageOpsDone[pkg]].state;
 608    // check if the package moved to the next dpkg state
 609    if(next_action && (strcmp(action, next_action) == 0))
 610    {
 611       // only read the translation if there is actually a next
 612       // action
 613       const char *translation = _(states[PackageOpsDone[pkg]].str);
 614       char s[200];
 615       snprintf(s, sizeof(s), translation, pkg);
 616
 617       // we moved from one dpkg state to a new one, report that
 618       PackageOpsDone[pkg]++;
 619       PackagesDone++;
 620       // build the status str
 621       status << "pmstatus:" << pkg
 622              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 623              << ":" << s
 624              << endl;
 625       if(OutStatusFd > 0)
 626          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 627       if (Debug == true)
 628          std::clog << "send: '" << status.str() << "'" << endl;
 629    }
 630    if (Debug == true)
 631       std::clog << "(parsed from dpkg) pkg: " << pkg
 632                 << " action: " << action << endl;
 633 }
 634                                                                         /*}}}*/
 635 // DPkgPM::handleDisappearAction                                        /*{{{*/
 636 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 637 {
 638    // record the package name for display and stuff later
 639    disappearedPkgs.insert(pkgname);
 640
 641    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 642    if (unlikely(Pkg.end() == true))
 643       return;
 644    // the disappeared package was auto-installed - nothing to do
 645    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 646       return;
 647    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 648    if (unlikely(PkgVer.end() == true))
 649       return;
 650    /* search in the list of dependencies for (Pre)Depends,
 651       check if this dependency has a Replaces on our package
 652       and if so transfer the manual installed flag to it */
 653    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 654    {
 655       if (Dep->Type != pkgCache::Dep::Depends &&
 656           Dep->Type != pkgCache::Dep::PreDepends)
 657          continue;
 658       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 659       if (unlikely(Tar.end() == true))
 660          continue;
 661       // the package is already marked as manual
 662       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 663          continue;
 664       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 665       if (TarVer.end() == true)
 666          continue;
 667       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 668       {
 669          if (Rep->Type != pkgCache::Dep::Replaces)
 670             continue;
 671          if (Pkg != Rep.TargetPkg())
 672             continue;
 673          // okay, they are strongly connected - transfer manual-bit
 674          if (Debug == true)
 675             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 676          Cache[Tar].Flags &= ~Flag::Auto;
 677          break;
 678       }
 679    }
 680 }
 681                                                                         /*}}}*/
 682 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 683 // ---------------------------------------------------------------------
 684 /*
 685  */
 686 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 687 {
 688    char *p, *q;
 689    int len;
 690
 691    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 692    d->dpkgbuf_pos += len;
 693    if(len <= 0)
 694       return;
 695
 696    // process line by line if we have a buffer
 697    p = q = d->dpkgbuf;
 698    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 699    {
 700       *q = 0;
 701       ProcessDpkgStatusLine(OutStatusFd, p);
 702       p=q+1; // continue with next line
 703    }
 704
 705    // now move the unprocessed bits (after the final \n that is now a 0x0)
 706    // to the start and update d->dpkgbuf_pos
 707    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 708    if(p == NULL)
 709       return;
 710
 711    // we are interessted in the first char *after* 0x0
 712    p++;
 713
 714    // move the unprocessed tail to the start and update pos
 715    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 716    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 717 }
 718                                                                         /*}}}*/
 719 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 720 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 721 {
 722    size_t const length = value.length();
 723    if (length == 0)
 724       return;
 725    // poor mans rstrip(", ")
 726    if (value[length-2] == ',' && value[length-1] == ' ')
 727       value.erase(length - 2, 2);
 728    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 729 }                                                                       /*}}}*/
 730 // DPkgPM::OpenLog                                                      /*{{{*/
 731 bool pkgDPkgPM::OpenLog()
 732 {
 733    string const logdir = _config->FindDir("Dir::Log");
 734    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 735       // FIXME: use a better string after freeze
 736       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 737
 738    // get current time
 739    char timestr[200];
 740    time_t const t = time(NULL);
 741    struct tm const * const tmp = localtime(&t);
 742    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 743
 744    // open terminal log
 745    string const logfile_name = flCombine(logdir,
 746                                    _config->Find("Dir::Log::Terminal"));
 747    if (!logfile_name.empty())
 748    {
 749       d->term_out = fopen(logfile_name.c_str(),"a");
 750       if (d->term_out == NULL)
 751          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 752       setvbuf(d->term_out, NULL, _IONBF, 0);
 753       SetCloseExec(fileno(d->term_out), true);
 754       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 755       {
 756          struct passwd *pw = getpwnam("root");
 757          struct group *gr = getgrnam("adm");
 758          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 759             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 760       }
 761       if (chmod(logfile_name.c_str(), 0640) != 0)
 762          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 763       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 764    }
 765
 766    // write your history
 767    string const history_name = flCombine(logdir,
 768                                    _config->Find("Dir::Log::History"));
 769    if (!history_name.empty())
 770    {
 771       d->history_out = fopen(history_name.c_str(),"a");
 772       if (d->history_out == NULL)
 773          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 774       SetCloseExec(fileno(d->history_out), true);
 775       chmod(history_name.c_str(), 0644);
 776       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 777       string remove, purge, install, reinstall, upgrade, downgrade;
 778       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 779       {
 780          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 781          string *line = NULL;
 782          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 783          if (Cache[I].NewInstall() == true)
 784             HISTORYINFO(install, CANDIDATE_AUTO)
 785          else if (Cache[I].ReInstall() == true)
 786             HISTORYINFO(reinstall, CANDIDATE)
 787          else if (Cache[I].Upgrade() == true)
 788             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 789          else if (Cache[I].Downgrade() == true)
 790             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 791          else if (Cache[I].Delete() == true)
 792             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 793          else
 794             continue;
 795          #undef HISTORYINFO
 796          line->append(I.FullName(false)).append(" (");
 797          switch (infostring) {
 798          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 799          case CANDIDATE_AUTO:
 800             line->append(Cache[I].CandVersion);
 801             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 802                line->append(", automatic");
 803             break;
 804          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 805          case CURRENT: line->append(Cache[I].CurVersion); break;
 806          }
 807          line->append("), ");
 808       }
 809       if (_config->Exists("Commandline::AsString") == true)
 810          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 811       WriteHistoryTag("Install", install);
 812       WriteHistoryTag("Reinstall", reinstall);
 813       WriteHistoryTag("Upgrade", upgrade);
 814       WriteHistoryTag("Downgrade",downgrade);
 815       WriteHistoryTag("Remove",remove);
 816       WriteHistoryTag("Purge",purge);
 817       fflush(d->history_out);
 818    }
 819
 820    return true;
 821 }
 822                                                                         /*}}}*/
 823 // DPkg::CloseLog                                                       /*{{{*/
 824 bool pkgDPkgPM::CloseLog()
 825 {
 826    char timestr[200];
 827    time_t t = time(NULL);
 828    struct tm *tmp = localtime(&t);
 829    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 830
 831    if(d->term_out)
 832    {
 833       fprintf(d->term_out, "Log ended: ");
 834       fprintf(d->term_out, "%s", timestr);
 835       fprintf(d->term_out, "\n");
 836       fclose(d->term_out);
 837    }
 838    d->term_out = NULL;
 839
 840    if(d->history_out)
 841    {
 842       if (disappearedPkgs.empty() == false)
 843       {
 844          string disappear;
 845          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 846               d != disappearedPkgs.end(); ++d)
 847          {
 848             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 849             disappear.append(*d);
 850             if (P.end() == true)
 851                disappear.append(", ");
 852             else
 853                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 854          }
 855          WriteHistoryTag("Disappeared", disappear);
 856       }
 857       if (d->dpkg_error.empty() == false)
 858          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 859       fprintf(d->history_out, "End-Date: %s\n", timestr);
 860       fclose(d->history_out);
 861    }
 862    d->history_out = NULL;
 863
 864    return true;
 865 }
 866                                                                         /*}}}*/
 867 /*{{{*/
 868 // This implements a racy version of pselect for those architectures
 869 // that don't have a working implementation.
 870 // FIXME: Probably can be removed on Lenny+1
 871 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 872    fd_set *exceptfds, const struct timespec *timeout,
 873    const sigset_t *sigmask)
 874 {
 875    sigset_t origmask;
 876    struct timeval tv;
 877    int retval;
 878
 879    tv.tv_sec = timeout->tv_sec;
 880    tv.tv_usec = timeout->tv_nsec/1000;
 881
 882    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 883    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 884    sigprocmask(SIG_SETMASK, &origmask, 0);
 885    return retval;
 886 }
 887 /*}}}*/
 888 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 889 // ---------------------------------------------------------------------
 890 /* This globs the operations and calls dpkg
 891  *
 892  * If it is called with "OutStatusFd" set to a valid file descriptor
 893  * apt will report the install progress over this fd. It maps the
 894  * dpkg states a package goes through to human readable (and i10n-able)
 895  * names and calculates a percentage for each step.
 896 */
 897 bool pkgDPkgPM::Go(int OutStatusFd)
 898 {
 899    pkgPackageManager::SigINTStop = false;
 900
 901    // Generate the base argument list for dpkg
 902    std::vector<const char *> Args;
 903    unsigned long StartSize = 0;
 904    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 905    {
 906       string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 907       size_t dpkgChrootLen = dpkgChrootDir.length();
 908       if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 909       {
 910          if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 911             --dpkgChrootLen;
 912          Tmp = Tmp.substr(dpkgChrootLen);
 913       }
 914    }
 915    Args.push_back(Tmp.c_str());
 916    StartSize += Tmp.length();
 917
 918    // Stick in any custom dpkg options
 919    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 920    if (Opts != 0)
 921    {
 922       Opts = Opts->Child;
 923       for (; Opts != 0; Opts = Opts->Next)
 924       {
 925          if (Opts->Value.empty() == true)
 926             continue;
 927          Args.push_back(Opts->Value.c_str());
 928          StartSize += Opts->Value.length();
 929       }
 930    }
 931
 932    size_t const BaseArgs = Args.size();
 933    // we need to detect if we can qualify packages with the architecture or not
 934    Args.push_back("--assert-multi-arch");
 935    Args.push_back(NULL);
 936
 937    pid_t dpkgAssertMultiArch = ExecFork();
 938    if (dpkgAssertMultiArch == 0)
 939    {
 940       dpkgChrootDirectory();
 941       // redirect everything to the ultimate sink as we only need the exit-status
 942       int const nullfd = open("/dev/null", O_RDONLY);
 943       dup2(nullfd, STDIN_FILENO);
 944       dup2(nullfd, STDOUT_FILENO);
 945       dup2(nullfd, STDERR_FILENO);
 946       execvp(Args[0], (char**) &Args[0]);
 947       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
 948       _exit(2);
 949    }
 950
 951    fd_set rfds;
 952    struct timespec tv;
 953    sigset_t sigmask;
 954    sigset_t original_sigmask;
 955
 956    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 957    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 958    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 959
 960    if (RunScripts("DPkg::Pre-Invoke") == false)
 961       return false;
 962
 963    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 964       return false;
 965
 966    // support subpressing of triggers processing for special
 967    // cases like d-i that runs the triggers handling manually
 968    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 969    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 970    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 971       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 972
 973    // map the dpkg states to the operations that are performed
 974    // (this is sorted in the same way as Item::Ops)
 975    static const struct DpkgState DpkgStatesOpMap[][7] = {
 976       // Install operation
 977       {
 978          {"half-installed", N_("Preparing %s")},
 979          {"unpacked", N_("Unpacking %s") },
 980          {NULL, NULL}
 981       },
 982       // Configure operation
 983       {
 984          {"unpacked",N_("Preparing to configure %s") },
 985          {"half-configured", N_("Configuring %s") },
 986          { "installed", N_("Installed %s")},
 987          {NULL, NULL}
 988       },
 989       // Remove operation
 990       {
 991          {"half-configured", N_("Preparing for removal of %s")},
 992          {"half-installed", N_("Removing %s")},
 993          {"config-files",  N_("Removed %s")},
 994          {NULL, NULL}
 995       },
 996       // Purge operation
 997       {
 998          {"config-files", N_("Preparing to completely remove %s")},
 999          {"not-installed", N_("Completely removed %s")},
1000          {NULL, NULL}
1001       },
1002    };
1003
1004    // init the PackageOps map, go over the list of packages that
1005    // that will be [installed|configured|removed|purged] and add
1006    // them to the PackageOps map (the dpkg states it goes through)
1007    // and the PackageOpsTranslations (human readable strings)
1008    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1009    {
1010       if((*I).Pkg.end() == true)
1011          continue;
1012
1013       string const name = (*I).Pkg.Name();
1014       PackageOpsDone[name] = 0;
1015       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1016       {
1017          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1018          PackagesTotal++;
1019       }
1020    }
1021
1022    d->stdin_is_dev_null = false;
1023
1024    // create log
1025    OpenLog();
1026
1027    bool dpkgMultiArch = false;
1028    if (dpkgAssertMultiArch > 0)
1029    {
1030       int Status = 0;
1031       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1032       {
1033          if (errno == EINTR)
1034             continue;
1035          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1036          break;
1037       }
1038       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1039          dpkgMultiArch = true;
1040    }
1041
1042    // this loop is runs once per operation
1043    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
1044    {
1045       // Do all actions with the same Op in one run
1046       vector<Item>::const_iterator J = I;
1047       if (TriggersPending == true)
1048          for (; J != List.end(); ++J)
1049          {
1050             if (J->Op == I->Op)
1051                continue;
1052             if (J->Op != Item::TriggersPending)
1053                break;
1054             vector<Item>::const_iterator T = J + 1;
1055             if (T != List.end() && T->Op == I->Op)
1056                continue;
1057             break;
1058          }
1059       else
1060          for (; J != List.end() && J->Op == I->Op; ++J)
1061             /* nothing */;
1062
1063       // keep track of allocated strings for multiarch package names
1064       std::vector<char *> Packages;
1065
1066       // start with the baseset of arguments
1067       unsigned long Size = StartSize;
1068       Args.erase(Args.begin() + BaseArgs, Args.end());
1069
1070       // Now check if we are within the MaxArgs limit
1071       //
1072       // this code below is problematic, because it may happen that
1073       // the argument list is split in a way that A depends on B
1074       // and they are in the same "--configure A B" run
1075       // - with the split they may now be configured in different
1076       //   runs, using Immediate-Configure-All can help prevent this.
1077       if (J - I > (signed)MaxArgs)
1078       {
1079          J = I + MaxArgs;
1080          unsigned long const size = MaxArgs + 10;
1081          Args.reserve(size);
1082          Packages.reserve(size);
1083       }
1084       else
1085       {
1086          unsigned long const size = (J - I) + 10;
1087          Args.reserve(size);
1088          Packages.reserve(size);
1089       }
1090
1091       int fd[2];
1092       if (pipe(fd) != 0)
1093          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1094
1095 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1096 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1097
1098       ADDARGC("--status-fd");
1099       char status_fd_buf[20];
1100       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1101       ADDARG(status_fd_buf);
1102       unsigned long const Op = I->Op;
1103
1104       switch (I->Op)
1105       {
1106          case Item::Remove:
1107          ADDARGC("--force-depends");
1108          ADDARGC("--force-remove-essential");
1109          ADDARGC("--remove");
1110          break;
1111
1112          case Item::Purge:
1113          ADDARGC("--force-depends");
1114          ADDARGC("--force-remove-essential");
1115          ADDARGC("--purge");
1116          break;
1117
1118          case Item::Configure:
1119          ADDARGC("--configure");
1120          break;
1121
1122          case Item::ConfigurePending:
1123          ADDARGC("--configure");
1124          ADDARGC("--pending");
1125          break;
1126
1127          case Item::TriggersPending:
1128          ADDARGC("--triggers-only");
1129          ADDARGC("--pending");
1130          break;
1131
1132          case Item::Install:
1133          ADDARGC("--unpack");
1134          ADDARGC("--auto-deconfigure");
1135          break;
1136       }
1137
1138       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1139           I->Op != Item::ConfigurePending)
1140       {
1141          ADDARGC("--no-triggers");
1142       }
1143 #undef ADDARGC
1144
1145       // Write in the file or package names
1146       if (I->Op == Item::Install)
1147       {
1148          for (;I != J && Size < MaxArgBytes; ++I)
1149          {
1150             if (I->File[0] != '/')
1151                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1152             Args.push_back(I->File.c_str());
1153             Size += I->File.length();
1154          }
1155       }
1156       else
1157       {
1158          string const nativeArch = _config->Find("APT::Architecture");
1159          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1160          for (;I != J && Size < MaxArgBytes; ++I)
1161          {
1162             if((*I).Pkg.end() == true)
1163                continue;
1164             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1165                continue;
1166             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1167             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1168                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1169                                            strcmp(I->Pkg.Arch(), "none") == 0))
1170             {
1171                char const * const name = I->Pkg.Name();
1172                ADDARG(name);
1173             }
1174             else
1175             {
1176                pkgCache::VerIterator PkgVer;
1177                std::string name = I->Pkg.Name();
1178                if (Op == Item::Remove || Op == Item::Purge)
1179                {
1180                   PkgVer = I->Pkg.CurrentVer();
1181                   if(PkgVer.end() == true)
1182                      PkgVer = FindNowVersion(I->Pkg);
1183                }
1184                else
1185                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1186                if (strcmp(I->Pkg.Arch(), "none") == 0)
1187                   ; // never arch-qualify a package without an arch
1188                else if (PkgVer.end() == false)
1189                   name.append(":").append(PkgVer.Arch());
1190                else
1191                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1192                char * const fullname = strdup(name.c_str());
1193                Packages.push_back(fullname);
1194                ADDARG(fullname);
1195             }
1196          }
1197          // skip configure action if all sheduled packages disappeared
1198          if (oldSize == Size)
1199             continue;
1200       }
1201 #undef ADDARG
1202
1203       J = I;
1204
1205       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1206       {
1207          for (std::vector<const char *>::const_iterator a = Args.begin();
1208               a != Args.end(); ++a)
1209             clog << *a << ' ';
1210          clog << endl;
1211          continue;
1212       }
1213       Args.push_back(NULL);
1214
1215       cout << flush;
1216       clog << flush;
1217       cerr << flush;
1218
1219       /* Mask off sig int/quit. We do this because dpkg also does when
1220          it forks scripts. What happens is that when you hit ctrl-c it sends
1221          it to all processes in the group. Since dpkg ignores the signal
1222          it doesn't die but we do! So we must also ignore it */
1223       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1224       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1225
1226       // Check here for any SIGINT
1227       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1228          break;
1229
1230
1231       // ignore SIGHUP as well (debian #463030)
1232       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1233
1234       struct    termios tt;
1235       struct    winsize win;
1236       int       master = -1;
1237       int       slave = -1;
1238
1239       // if tcgetattr does not return zero there was a error
1240       // and we do not do any pty magic
1241       _error->PushToStack();
1242       if (tcgetattr(STDOUT_FILENO, &tt) == 0)
1243       {
1244          ioctl(0, TIOCGWINSZ, (char *)&win);
1245          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1246          {
1247             _error->Errno("openpty", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1248             master = slave = -1;
1249          }  else {
1250             struct termios rtt;
1251             rtt = tt;
1252             cfmakeraw(&rtt);
1253             rtt.c_lflag &= ~ECHO;
1254             rtt.c_lflag |= ISIG;
1255             // block SIGTTOU during tcsetattr to prevent a hang if
1256             // the process is a member of the background process group
1257             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1258             sigemptyset(&sigmask);
1259             sigaddset(&sigmask, SIGTTOU);
1260             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1261             tcsetattr(0, TCSAFLUSH, &rtt);
1262             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1263          }
1264       }
1265       // complain only if stdout is either a terminal (but still failed) or is an invalid
1266       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1267       else if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1268          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1269
1270       if (_error->PendingError() == true)
1271          _error->DumpErrors(std::cerr);
1272       _error->RevertToStack();
1273
1274        // Fork dpkg
1275       pid_t Child;
1276       _config->Set("APT::Keep-Fds::",fd[1]);
1277       // send status information that we are about to fork dpkg
1278       if(OutStatusFd > 0) {
1279          ostringstream status;
1280          status << "pmstatus:dpkg-exec:"
1281                 << (PackagesDone/float(PackagesTotal)*100.0)
1282                 << ":" << _("Running dpkg")
1283                 << endl;
1284          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
1285       }
1286       Child = ExecFork();
1287
1288       // This is the child
1289       if (Child == 0)
1290       {
1291          if(slave >= 0 && master >= 0)
1292          {
1293             setsid();
1294             ioctl(slave, TIOCSCTTY, 0);
1295             close(master);
1296             dup2(slave, 0);
1297             dup2(slave, 1);
1298             dup2(slave, 2);
1299             close(slave);
1300          }
1301          close(fd[0]); // close the read end of the pipe
1302
1303          dpkgChrootDirectory();
1304
1305          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1306             _exit(100);
1307
1308          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1309          {
1310             int Flags,dummy;
1311             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1312                _exit(100);
1313
1314             // Discard everything in stdin before forking dpkg
1315             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1316                _exit(100);
1317
1318             while (read(STDIN_FILENO,&dummy,1) == 1);
1319
1320             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1321                _exit(100);
1322          }
1323
1324          /* No Job Control Stop Env is a magic dpkg var that prevents it
1325             from using sigstop */
1326          putenv((char *)"DPKG_NO_TSTP=yes");
1327          execvp(Args[0], (char**) &Args[0]);
1328          cerr << "Could not exec dpkg!" << endl;
1329          _exit(100);
1330       }
1331
1332       // apply ionice
1333       if (_config->FindB("DPkg::UseIoNice", false) == true)
1334          ionice(Child);
1335
1336       // clear the Keep-Fd again
1337       _config->Clear("APT::Keep-Fds",fd[1]);
1338
1339       // Wait for dpkg
1340       int Status = 0;
1341
1342       // we read from dpkg here
1343       int const _dpkgin = fd[0];
1344       close(fd[1]);                        // close the write end of the pipe
1345
1346       if(slave > 0)
1347          close(slave);
1348
1349       // setups fds
1350       sigemptyset(&sigmask);
1351       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1352
1353       /* free vectors (and therefore memory) as we don't need the included data anymore */
1354       for (std::vector<char *>::const_iterator p = Packages.begin();
1355            p != Packages.end(); ++p)
1356          free(*p);
1357       Packages.clear();
1358
1359       // the result of the waitpid call
1360       int res;
1361       int select_ret;
1362       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1363          if(res < 0) {
1364             // FIXME: move this to a function or something, looks ugly here
1365             // error handling, waitpid returned -1
1366             if (errno == EINTR)
1367                continue;
1368             RunScripts("DPkg::Post-Invoke");
1369
1370             // Restore sig int/quit
1371             signal(SIGQUIT,old_SIGQUIT);
1372             signal(SIGINT,old_SIGINT);
1373
1374             signal(SIGHUP,old_SIGHUP);
1375             return _error->Errno("waitpid","Couldn't wait for subprocess");
1376          }
1377
1378          // wait for input or output here
1379          FD_ZERO(&rfds);
1380          if (master >= 0 && !d->stdin_is_dev_null)
1381             FD_SET(0, &rfds);
1382          FD_SET(_dpkgin, &rfds);
1383          if(master >= 0)
1384             FD_SET(master, &rfds);
1385          tv.tv_sec = 1;
1386          tv.tv_nsec = 0;
1387          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1388                               &tv, &original_sigmask);
1389          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1390             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1391                                       NULL, &tv, &original_sigmask);
1392          if (select_ret == 0)
1393             continue;
1394          else if (select_ret < 0 && errno == EINTR)
1395             continue;
1396          else if (select_ret < 0)
1397          {
1398             perror("select() returned error");
1399             continue;
1400          }
1401
1402          if(master >= 0 && FD_ISSET(master, &rfds))
1403             DoTerminalPty(master);
1404          if(master >= 0 && FD_ISSET(0, &rfds))
1405             DoStdin(master);
1406          if(FD_ISSET(_dpkgin, &rfds))
1407             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1408       }
1409       close(_dpkgin);
1410
1411       // Restore sig int/quit
1412       signal(SIGQUIT,old_SIGQUIT);
1413       signal(SIGINT,old_SIGINT);
1414
1415       signal(SIGHUP,old_SIGHUP);
1416
1417       if(master >= 0)
1418       {
1419          tcsetattr(0, TCSAFLUSH, &tt);
1420          close(master);
1421       }
1422
1423       // Check for an error code.
1424       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1425       {
1426          // if it was set to "keep-dpkg-runing" then we won't return
1427          // here but keep the loop going and just report it as a error
1428          // for later
1429          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1430
1431          if(stopOnError)
1432             RunScripts("DPkg::Post-Invoke");
1433
1434          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1435             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1436          else if (WIFEXITED(Status) != 0)
1437             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1438          else
1439             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1440
1441          if(d->dpkg_error.size() > 0)
1442             _error->Error("%s", d->dpkg_error.c_str());
1443
1444          if(stopOnError)
1445          {
1446             CloseLog();
1447             return false;
1448          }
1449       }
1450    }
1451    CloseLog();
1452
1453    if (pkgPackageManager::SigINTStop)
1454        _error->Warning(_("Operation was interrupted before it could finish"));
1455
1456    if (RunScripts("DPkg::Post-Invoke") == false)
1457       return false;
1458
1459    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1460    {
1461       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1462       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1463           unlink(oldpkgcache.c_str()) == 0)
1464       {
1465          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1466          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1467          {
1468             _error->PushToStack();
1469             pkgCacheFile CacheFile;
1470             CacheFile.BuildCaches(NULL, true);
1471             _error->RevertToStack();
1472          }
1473       }
1474    }
1475
1476    Cache.writeStateFile(NULL);
1477    return true;
1478 }
1479
1480 void SigINT(int sig) {
1481    pkgPackageManager::SigINTStop = true;
1482 }
1483                                                                         /*}}}*/
1484 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1485 // ---------------------------------------------------------------------
1486 /* */
1487 void pkgDPkgPM::Reset()
1488 {
1489    List.erase(List.begin(),List.end());
1490 }
1491                                                                         /*}}}*/
1492 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1493 // ---------------------------------------------------------------------
1494 /* */
1495 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1496 {
1497    // If apport doesn't exist or isn't installed do nothing
1498    // This e.g. prevents messages in 'universes' without apport
1499    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1500    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1501       return;
1502
1503    string pkgname, reportfile, srcpkgname, pkgver, arch;
1504    string::size_type pos;
1505    FILE *report;
1506
1507    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1508    {
1509       std::clog << "configured to not write apport reports" << std::endl;
1510       return;
1511    }
1512
1513    // only report the first errors
1514    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1515    {
1516       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1517       return;
1518    }
1519
1520    // check if its not a follow up error
1521    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1522    if(strstr(errormsg, needle) != NULL) {
1523       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1524       return;
1525    }
1526
1527    // do not report disk-full failures
1528    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1529       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1530       return;
1531    }
1532
1533    // do not report out-of-memory failures
1534    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1535       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1536       return;
1537    }
1538
1539    // do not report dpkg I/O errors
1540    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1541    if(strstr(errormsg, "short read in buffer_copy (")) {
1542       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1543       return;
1544    }
1545
1546    // get the pkgname and reportfile
1547    pkgname = flNotDir(pkgpath);
1548    pos = pkgname.find('_');
1549    if(pos != string::npos)
1550       pkgname = pkgname.substr(0, pos);
1551
1552    // find the package versin and source package name
1553    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1554    if (Pkg.end() == true)
1555       return;
1556    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1557    if (Ver.end() == true)
1558       return;
1559    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1560    pkgRecords Recs(Cache);
1561    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1562    srcpkgname = Parse.SourcePkg();
1563    if(srcpkgname.empty())
1564       srcpkgname = pkgname;
1565
1566    // if the file exists already, we check:
1567    // - if it was reported already (touched by apport).
1568    //   If not, we do nothing, otherwise
1569    //    we overwrite it. This is the same behaviour as apport
1570    // - if we have a report with the same pkgversion already
1571    //   then we skip it
1572    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1573    if(FileExists(reportfile))
1574    {
1575       struct stat buf;
1576       char strbuf[255];
1577
1578       // check atime/mtime
1579       stat(reportfile.c_str(), &buf);
1580       if(buf.st_mtime > buf.st_atime)
1581          return;
1582
1583       // check if the existing report is the same version
1584       report = fopen(reportfile.c_str(),"r");
1585       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1586       {
1587          if(strstr(strbuf,"Package:") == strbuf)
1588          {
1589             char pkgname[255], version[255];
1590             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1591                if(strcmp(pkgver.c_str(), version) == 0)
1592                {
1593                   fclose(report);
1594                   return;
1595                }
1596          }
1597       }
1598       fclose(report);
1599    }
1600
1601    // now write the report
1602    arch = _config->Find("APT::Architecture");
1603    report = fopen(reportfile.c_str(),"w");
1604    if(report == NULL)
1605       return;
1606    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1607       chmod(reportfile.c_str(), 0);
1608    else
1609       chmod(reportfile.c_str(), 0600);
1610    fprintf(report, "ProblemType: Package\n");
1611    fprintf(report, "Architecture: %s\n", arch.c_str());
1612    time_t now = time(NULL);
1613    fprintf(report, "Date: %s" , ctime(&now));
1614    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1615    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1616    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1617
1618    // ensure that the log is flushed
1619    if(d->term_out)
1620       fflush(d->term_out);
1621
1622    // attach terminal log it if we have it
1623    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1624    if (!logfile_name.empty())
1625    {
1626       FILE *log = NULL;
1627
1628       fprintf(report, "DpkgTerminalLog:\n");
1629       log = fopen(logfile_name.c_str(),"r");
1630       if(log != NULL)
1631       {
1632          char buf[1024];
1633          while( fgets(buf, sizeof(buf), log) != NULL)
1634             fprintf(report, " %s", buf);
1635          fclose(log);
1636       }
1637    }
1638
1639    // log the ordering
1640    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1641    fprintf(report, "AptOrdering:\n");
1642    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1643       if ((*I).Pkg != NULL)
1644          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1645       else
1646          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1647
1648    // attach dmesg log (to learn about segfaults)
1649    if (FileExists("/bin/dmesg"))
1650    {
1651       fprintf(report, "Dmesg:\n");
1652       FILE *log = popen("/bin/dmesg","r");
1653       if(log != NULL)
1654       {
1655          char buf[1024];
1656          while( fgets(buf, sizeof(buf), log) != NULL)
1657             fprintf(report, " %s", buf);
1658          pclose(log);
1659       }
1660    }
1661
1662    // attach df -l log (to learn about filesystem status)
1663    if (FileExists("/bin/df"))
1664    {
1665
1666       fprintf(report, "Df:\n");
1667       FILE *log = popen("/bin/df -l","r");
1668       if(log != NULL)
1669       {
1670          char buf[1024];
1671          while( fgets(buf, sizeof(buf), log) != NULL)
1672             fprintf(report, " %s", buf);
1673          pclose(log);
1674       }
1675    }
1676
1677    fclose(report);
1678
1679 }
1680                                                                         /*}}}*/