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       struct passwd *pw;
 755       struct group *gr;
 756       pw = getpwnam("root");
 757       gr = getgrnam("adm");
 758       if (pw != NULL && gr != NULL)
 759          if(chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 760             _error->Errno("OpenLog", "chown failed");
 761       chmod(logfile_name.c_str(), 0640);
 762       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 763    }
 764
 765    // write your history
 766    string const history_name = flCombine(logdir,
 767                                    _config->Find("Dir::Log::History"));
 768    if (!history_name.empty())
 769    {
 770       d->history_out = fopen(history_name.c_str(),"a");
 771       if (d->history_out == NULL)
 772          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 773       SetCloseExec(fileno(d->history_out), true);
 774       chmod(history_name.c_str(), 0644);
 775       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 776       string remove, purge, install, reinstall, upgrade, downgrade;
 777       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 778       {
 779          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 780          string *line = NULL;
 781          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 782          if (Cache[I].NewInstall() == true)
 783             HISTORYINFO(install, CANDIDATE_AUTO)
 784          else if (Cache[I].ReInstall() == true)
 785             HISTORYINFO(reinstall, CANDIDATE)
 786          else if (Cache[I].Upgrade() == true)
 787             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 788          else if (Cache[I].Downgrade() == true)
 789             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 790          else if (Cache[I].Delete() == true)
 791             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 792          else
 793             continue;
 794          #undef HISTORYINFO
 795          line->append(I.FullName(false)).append(" (");
 796          switch (infostring) {
 797          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 798          case CANDIDATE_AUTO:
 799             line->append(Cache[I].CandVersion);
 800             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 801                line->append(", automatic");
 802             break;
 803          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 804          case CURRENT: line->append(Cache[I].CurVersion); break;
 805          }
 806          line->append("), ");
 807       }
 808       if (_config->Exists("Commandline::AsString") == true)
 809          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 810       WriteHistoryTag("Install", install);
 811       WriteHistoryTag("Reinstall", reinstall);
 812       WriteHistoryTag("Upgrade", upgrade);
 813       WriteHistoryTag("Downgrade",downgrade);
 814       WriteHistoryTag("Remove",remove);
 815       WriteHistoryTag("Purge",purge);
 816       fflush(d->history_out);
 817    }
 818
 819    return true;
 820 }
 821                                                                         /*}}}*/
 822 // DPkg::CloseLog                                                       /*{{{*/
 823 bool pkgDPkgPM::CloseLog()
 824 {
 825    char timestr[200];
 826    time_t t = time(NULL);
 827    struct tm *tmp = localtime(&t);
 828    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 829
 830    if(d->term_out)
 831    {
 832       fprintf(d->term_out, "Log ended: ");
 833       fprintf(d->term_out, "%s", timestr);
 834       fprintf(d->term_out, "\n");
 835       fclose(d->term_out);
 836    }
 837    d->term_out = NULL;
 838
 839    if(d->history_out)
 840    {
 841       if (disappearedPkgs.empty() == false)
 842       {
 843          string disappear;
 844          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 845               d != disappearedPkgs.end(); ++d)
 846          {
 847             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 848             disappear.append(*d);
 849             if (P.end() == true)
 850                disappear.append(", ");
 851             else
 852                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 853          }
 854          WriteHistoryTag("Disappeared", disappear);
 855       }
 856       if (d->dpkg_error.empty() == false)
 857          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 858       fprintf(d->history_out, "End-Date: %s\n", timestr);
 859       fclose(d->history_out);
 860    }
 861    d->history_out = NULL;
 862
 863    return true;
 864 }
 865                                                                         /*}}}*/
 866 /*{{{*/
 867 // This implements a racy version of pselect for those architectures
 868 // that don't have a working implementation.
 869 // FIXME: Probably can be removed on Lenny+1
 870 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 871    fd_set *exceptfds, const struct timespec *timeout,
 872    const sigset_t *sigmask)
 873 {
 874    sigset_t origmask;
 875    struct timeval tv;
 876    int retval;
 877
 878    tv.tv_sec = timeout->tv_sec;
 879    tv.tv_usec = timeout->tv_nsec/1000;
 880
 881    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 882    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 883    sigprocmask(SIG_SETMASK, &origmask, 0);
 884    return retval;
 885 }
 886 /*}}}*/
 887 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 888 // ---------------------------------------------------------------------
 889 /* This globs the operations and calls dpkg
 890  *
 891  * If it is called with "OutStatusFd" set to a valid file descriptor
 892  * apt will report the install progress over this fd. It maps the
 893  * dpkg states a package goes through to human readable (and i10n-able)
 894  * names and calculates a percentage for each step.
 895 */
 896 bool pkgDPkgPM::Go(int OutStatusFd)
 897 {
 898    pkgPackageManager::SigINTStop = false;
 899
 900    // Generate the base argument list for dpkg
 901    std::vector<const char *> Args;
 902    unsigned long StartSize = 0;
 903    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 904    {
 905       string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 906       size_t dpkgChrootLen = dpkgChrootDir.length();
 907       if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 908       {
 909          if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 910             --dpkgChrootLen;
 911          Tmp = Tmp.substr(dpkgChrootLen);
 912       }
 913    }
 914    Args.push_back(Tmp.c_str());
 915    StartSize += Tmp.length();
 916
 917    // Stick in any custom dpkg options
 918    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 919    if (Opts != 0)
 920    {
 921       Opts = Opts->Child;
 922       for (; Opts != 0; Opts = Opts->Next)
 923       {
 924          if (Opts->Value.empty() == true)
 925             continue;
 926          Args.push_back(Opts->Value.c_str());
 927          StartSize += Opts->Value.length();
 928       }
 929    }
 930
 931    size_t const BaseArgs = Args.size();
 932    // we need to detect if we can qualify packages with the architecture or not
 933    Args.push_back("--assert-multi-arch");
 934    Args.push_back(NULL);
 935
 936    pid_t dpkgAssertMultiArch = ExecFork();
 937    if (dpkgAssertMultiArch == 0)
 938    {
 939       dpkgChrootDirectory();
 940       // redirect everything to the ultimate sink as we only need the exit-status
 941       int const nullfd = open("/dev/null", O_RDONLY);
 942       dup2(nullfd, STDIN_FILENO);
 943       dup2(nullfd, STDOUT_FILENO);
 944       dup2(nullfd, STDERR_FILENO);
 945       execvp(Args[0], (char**) &Args[0]);
 946       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
 947       _exit(2);
 948    }
 949
 950    fd_set rfds;
 951    struct timespec tv;
 952    sigset_t sigmask;
 953    sigset_t original_sigmask;
 954
 955    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 956    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 957    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 958
 959    if (RunScripts("DPkg::Pre-Invoke") == false)
 960       return false;
 961
 962    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 963       return false;
 964
 965    // support subpressing of triggers processing for special
 966    // cases like d-i that runs the triggers handling manually
 967    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 968    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 969    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 970       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 971
 972    // map the dpkg states to the operations that are performed
 973    // (this is sorted in the same way as Item::Ops)
 974    static const struct DpkgState DpkgStatesOpMap[][7] = {
 975       // Install operation
 976       {
 977          {"half-installed", N_("Preparing %s")},
 978          {"unpacked", N_("Unpacking %s") },
 979          {NULL, NULL}
 980       },
 981       // Configure operation
 982       {
 983          {"unpacked",N_("Preparing to configure %s") },
 984          {"half-configured", N_("Configuring %s") },
 985          { "installed", N_("Installed %s")},
 986          {NULL, NULL}
 987       },
 988       // Remove operation
 989       {
 990          {"half-configured", N_("Preparing for removal of %s")},
 991          {"half-installed", N_("Removing %s")},
 992          {"config-files",  N_("Removed %s")},
 993          {NULL, NULL}
 994       },
 995       // Purge operation
 996       {
 997          {"config-files", N_("Preparing to completely remove %s")},
 998          {"not-installed", N_("Completely removed %s")},
 999          {NULL, NULL}
1000       },
1001    };
1002
1003    // init the PackageOps map, go over the list of packages that
1004    // that will be [installed|configured|removed|purged] and add
1005    // them to the PackageOps map (the dpkg states it goes through)
1006    // and the PackageOpsTranslations (human readable strings)
1007    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1008    {
1009       if((*I).Pkg.end() == true)
1010          continue;
1011
1012       string const name = (*I).Pkg.Name();
1013       PackageOpsDone[name] = 0;
1014       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1015       {
1016          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1017          PackagesTotal++;
1018       }
1019    }
1020
1021    d->stdin_is_dev_null = false;
1022
1023    // create log
1024    OpenLog();
1025
1026    bool dpkgMultiArch = false;
1027    if (dpkgAssertMultiArch > 0)
1028    {
1029       int Status = 0;
1030       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1031       {
1032          if (errno == EINTR)
1033             continue;
1034          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1035          break;
1036       }
1037       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1038          dpkgMultiArch = true;
1039    }
1040
1041    // this loop is runs once per operation
1042    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
1043    {
1044       // Do all actions with the same Op in one run
1045       vector<Item>::const_iterator J = I;
1046       if (TriggersPending == true)
1047          for (; J != List.end(); ++J)
1048          {
1049             if (J->Op == I->Op)
1050                continue;
1051             if (J->Op != Item::TriggersPending)
1052                break;
1053             vector<Item>::const_iterator T = J + 1;
1054             if (T != List.end() && T->Op == I->Op)
1055                continue;
1056             break;
1057          }
1058       else
1059          for (; J != List.end() && J->Op == I->Op; ++J)
1060             /* nothing */;
1061
1062       // keep track of allocated strings for multiarch package names
1063       std::vector<char *> Packages;
1064
1065       // start with the baseset of arguments
1066       unsigned long Size = StartSize;
1067       Args.erase(Args.begin() + BaseArgs, Args.end());
1068
1069       // Now check if we are within the MaxArgs limit
1070       //
1071       // this code below is problematic, because it may happen that
1072       // the argument list is split in a way that A depends on B
1073       // and they are in the same "--configure A B" run
1074       // - with the split they may now be configured in different
1075       //   runs, using Immediate-Configure-All can help prevent this.
1076       if (J - I > (signed)MaxArgs)
1077       {
1078          J = I + MaxArgs;
1079          unsigned long const size = MaxArgs + 10;
1080          Args.reserve(size);
1081          Packages.reserve(size);
1082       }
1083       else
1084       {
1085          unsigned long const size = (J - I) + 10;
1086          Args.reserve(size);
1087          Packages.reserve(size);
1088       }
1089
1090       int fd[2];
1091       if (pipe(fd) != 0)
1092          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1093
1094 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1095 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1096
1097       ADDARGC("--status-fd");
1098       char status_fd_buf[20];
1099       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1100       ADDARG(status_fd_buf);
1101       unsigned long const Op = I->Op;
1102
1103       switch (I->Op)
1104       {
1105          case Item::Remove:
1106          ADDARGC("--force-depends");
1107          ADDARGC("--force-remove-essential");
1108          ADDARGC("--remove");
1109          break;
1110
1111          case Item::Purge:
1112          ADDARGC("--force-depends");
1113          ADDARGC("--force-remove-essential");
1114          ADDARGC("--purge");
1115          break;
1116
1117          case Item::Configure:
1118          ADDARGC("--configure");
1119          break;
1120
1121          case Item::ConfigurePending:
1122          ADDARGC("--configure");
1123          ADDARGC("--pending");
1124          break;
1125
1126          case Item::TriggersPending:
1127          ADDARGC("--triggers-only");
1128          ADDARGC("--pending");
1129          break;
1130
1131          case Item::Install:
1132          ADDARGC("--unpack");
1133          ADDARGC("--auto-deconfigure");
1134          break;
1135       }
1136
1137       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1138           I->Op != Item::ConfigurePending)
1139       {
1140          ADDARGC("--no-triggers");
1141       }
1142 #undef ADDARGC
1143
1144       // Write in the file or package names
1145       if (I->Op == Item::Install)
1146       {
1147          for (;I != J && Size < MaxArgBytes; ++I)
1148          {
1149             if (I->File[0] != '/')
1150                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1151             Args.push_back(I->File.c_str());
1152             Size += I->File.length();
1153          }
1154       }
1155       else
1156       {
1157          string const nativeArch = _config->Find("APT::Architecture");
1158          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1159          for (;I != J && Size < MaxArgBytes; ++I)
1160          {
1161             if((*I).Pkg.end() == true)
1162                continue;
1163             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1164                continue;
1165             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1166             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1167                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1168                                            strcmp(I->Pkg.Arch(), "none") == 0))
1169             {
1170                char const * const name = I->Pkg.Name();
1171                ADDARG(name);
1172             }
1173             else
1174             {
1175                pkgCache::VerIterator PkgVer;
1176                std::string name = I->Pkg.Name();
1177                if (Op == Item::Remove || Op == Item::Purge)
1178                {
1179                   PkgVer = I->Pkg.CurrentVer();
1180                   if(PkgVer.end() == true)
1181                      PkgVer = FindNowVersion(I->Pkg);
1182                }
1183                else
1184                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1185                if (strcmp(I->Pkg.Arch(), "none") == 0)
1186                   ; // never arch-qualify a package without an arch
1187                else if (PkgVer.end() == false)
1188                   name.append(":").append(PkgVer.Arch());
1189                else
1190                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1191                char * const fullname = strdup(name.c_str());
1192                Packages.push_back(fullname);
1193                ADDARG(fullname);
1194             }
1195          }
1196          // skip configure action if all sheduled packages disappeared
1197          if (oldSize == Size)
1198             continue;
1199       }
1200 #undef ADDARG
1201
1202       J = I;
1203
1204       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1205       {
1206          for (std::vector<const char *>::const_iterator a = Args.begin();
1207               a != Args.end(); ++a)
1208             clog << *a << ' ';
1209          clog << endl;
1210          continue;
1211       }
1212       Args.push_back(NULL);
1213
1214       cout << flush;
1215       clog << flush;
1216       cerr << flush;
1217
1218       /* Mask off sig int/quit. We do this because dpkg also does when
1219          it forks scripts. What happens is that when you hit ctrl-c it sends
1220          it to all processes in the group. Since dpkg ignores the signal
1221          it doesn't die but we do! So we must also ignore it */
1222       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1223       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1224
1225       // Check here for any SIGINT
1226       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1227          break;
1228
1229
1230       // ignore SIGHUP as well (debian #463030)
1231       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1232
1233       struct    termios tt;
1234       struct    winsize win;
1235       int       master = -1;
1236       int       slave = -1;
1237
1238       // if tcgetattr does not return zero there was a error
1239       // and we do not do any pty magic
1240       if (tcgetattr(0, &tt) == 0)
1241       {
1242          ioctl(0, TIOCGWINSZ, (char *)&win);
1243          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1244          {
1245             const char *s = _("Can not write log, openpty() "
1246                               "failed (/dev/pts not mounted?)\n");
1247             fprintf(stderr, "%s",s);
1248             if(d->term_out)
1249               fprintf(d->term_out, "%s",s);
1250             master = slave = -1;
1251          }  else {
1252             struct termios rtt;
1253             rtt = tt;
1254             cfmakeraw(&rtt);
1255             rtt.c_lflag &= ~ECHO;
1256             rtt.c_lflag |= ISIG;
1257             // block SIGTTOU during tcsetattr to prevent a hang if
1258             // the process is a member of the background process group
1259             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1260             sigemptyset(&sigmask);
1261             sigaddset(&sigmask, SIGTTOU);
1262             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1263             tcsetattr(0, TCSAFLUSH, &rtt);
1264             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1265          }
1266       }
1267        // Fork dpkg
1268       pid_t Child;
1269       _config->Set("APT::Keep-Fds::",fd[1]);
1270       // send status information that we are about to fork dpkg
1271       if(OutStatusFd > 0) {
1272          ostringstream status;
1273          status << "pmstatus:dpkg-exec:"
1274                 << (PackagesDone/float(PackagesTotal)*100.0)
1275                 << ":" << _("Running dpkg")
1276                 << endl;
1277          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
1278       }
1279       Child = ExecFork();
1280
1281       // This is the child
1282       if (Child == 0)
1283       {
1284          if(slave >= 0 && master >= 0)
1285          {
1286             setsid();
1287             ioctl(slave, TIOCSCTTY, 0);
1288             close(master);
1289             dup2(slave, 0);
1290             dup2(slave, 1);
1291             dup2(slave, 2);
1292             close(slave);
1293          }
1294          close(fd[0]); // close the read end of the pipe
1295
1296          dpkgChrootDirectory();
1297
1298          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1299             _exit(100);
1300
1301          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1302          {
1303             int Flags,dummy;
1304             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1305                _exit(100);
1306
1307             // Discard everything in stdin before forking dpkg
1308             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1309                _exit(100);
1310
1311             while (read(STDIN_FILENO,&dummy,1) == 1);
1312
1313             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1314                _exit(100);
1315          }
1316
1317          /* No Job Control Stop Env is a magic dpkg var that prevents it
1318             from using sigstop */
1319          putenv((char *)"DPKG_NO_TSTP=yes");
1320          execvp(Args[0], (char**) &Args[0]);
1321          cerr << "Could not exec dpkg!" << endl;
1322          _exit(100);
1323       }
1324
1325       // apply ionice
1326       if (_config->FindB("DPkg::UseIoNice", false) == true)
1327          ionice(Child);
1328
1329       // clear the Keep-Fd again
1330       _config->Clear("APT::Keep-Fds",fd[1]);
1331
1332       // Wait for dpkg
1333       int Status = 0;
1334
1335       // we read from dpkg here
1336       int const _dpkgin = fd[0];
1337       close(fd[1]);                        // close the write end of the pipe
1338
1339       if(slave > 0)
1340          close(slave);
1341
1342       // setups fds
1343       sigemptyset(&sigmask);
1344       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1345
1346       /* free vectors (and therefore memory) as we don't need the included data anymore */
1347       for (std::vector<char *>::const_iterator p = Packages.begin();
1348            p != Packages.end(); ++p)
1349          free(*p);
1350       Packages.clear();
1351
1352       // the result of the waitpid call
1353       int res;
1354       int select_ret;
1355       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1356          if(res < 0) {
1357             // FIXME: move this to a function or something, looks ugly here
1358             // error handling, waitpid returned -1
1359             if (errno == EINTR)
1360                continue;
1361             RunScripts("DPkg::Post-Invoke");
1362
1363             // Restore sig int/quit
1364             signal(SIGQUIT,old_SIGQUIT);
1365             signal(SIGINT,old_SIGINT);
1366
1367             signal(SIGHUP,old_SIGHUP);
1368             return _error->Errno("waitpid","Couldn't wait for subprocess");
1369          }
1370
1371          // wait for input or output here
1372          FD_ZERO(&rfds);
1373          if (master >= 0 && !d->stdin_is_dev_null)
1374             FD_SET(0, &rfds);
1375          FD_SET(_dpkgin, &rfds);
1376          if(master >= 0)
1377             FD_SET(master, &rfds);
1378          tv.tv_sec = 1;
1379          tv.tv_nsec = 0;
1380          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1381                               &tv, &original_sigmask);
1382          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1383             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1384                                       NULL, &tv, &original_sigmask);
1385          if (select_ret == 0)
1386             continue;
1387          else if (select_ret < 0 && errno == EINTR)
1388             continue;
1389          else if (select_ret < 0)
1390          {
1391             perror("select() returned error");
1392             continue;
1393          }
1394
1395          if(master >= 0 && FD_ISSET(master, &rfds))
1396             DoTerminalPty(master);
1397          if(master >= 0 && FD_ISSET(0, &rfds))
1398             DoStdin(master);
1399          if(FD_ISSET(_dpkgin, &rfds))
1400             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1401       }
1402       close(_dpkgin);
1403
1404       // Restore sig int/quit
1405       signal(SIGQUIT,old_SIGQUIT);
1406       signal(SIGINT,old_SIGINT);
1407
1408       signal(SIGHUP,old_SIGHUP);
1409
1410       if(master >= 0)
1411       {
1412          tcsetattr(0, TCSAFLUSH, &tt);
1413          close(master);
1414       }
1415
1416       // Check for an error code.
1417       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1418       {
1419          // if it was set to "keep-dpkg-runing" then we won't return
1420          // here but keep the loop going and just report it as a error
1421          // for later
1422          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1423
1424          if(stopOnError)
1425             RunScripts("DPkg::Post-Invoke");
1426
1427          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1428             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1429          else if (WIFEXITED(Status) != 0)
1430             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1431          else
1432             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1433
1434          if(d->dpkg_error.size() > 0)
1435             _error->Error("%s", d->dpkg_error.c_str());
1436
1437          if(stopOnError)
1438          {
1439             CloseLog();
1440             return false;
1441          }
1442       }
1443    }
1444    CloseLog();
1445
1446    if (pkgPackageManager::SigINTStop)
1447        _error->Warning(_("Operation was interrupted before it could finish"));
1448
1449    if (RunScripts("DPkg::Post-Invoke") == false)
1450       return false;
1451
1452    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1453    {
1454       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1455       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1456           unlink(oldpkgcache.c_str()) == 0)
1457       {
1458          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1459          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1460          {
1461             _error->PushToStack();
1462             pkgCacheFile CacheFile;
1463             CacheFile.BuildCaches(NULL, true);
1464             _error->RevertToStack();
1465          }
1466       }
1467    }
1468
1469    Cache.writeStateFile(NULL);
1470    return true;
1471 }
1472
1473 void SigINT(int sig) {
1474    pkgPackageManager::SigINTStop = true;
1475 }
1476                                                                         /*}}}*/
1477 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1478 // ---------------------------------------------------------------------
1479 /* */
1480 void pkgDPkgPM::Reset()
1481 {
1482    List.erase(List.begin(),List.end());
1483 }
1484                                                                         /*}}}*/
1485 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1486 // ---------------------------------------------------------------------
1487 /* */
1488 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1489 {
1490    // If apport doesn't exist or isn't installed do nothing
1491    // This e.g. prevents messages in 'universes' without apport
1492    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1493    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1494       return;
1495
1496    string pkgname, reportfile, srcpkgname, pkgver, arch;
1497    string::size_type pos;
1498    FILE *report;
1499
1500    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1501    {
1502       std::clog << "configured to not write apport reports" << std::endl;
1503       return;
1504    }
1505
1506    // only report the first errors
1507    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1508    {
1509       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1510       return;
1511    }
1512
1513    // check if its not a follow up error
1514    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1515    if(strstr(errormsg, needle) != NULL) {
1516       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1517       return;
1518    }
1519
1520    // do not report disk-full failures
1521    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1522       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1523       return;
1524    }
1525
1526    // do not report out-of-memory failures
1527    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1528       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1529       return;
1530    }
1531
1532    // do not report dpkg I/O errors
1533    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1534    if(strstr(errormsg, "short read in buffer_copy (")) {
1535       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1536       return;
1537    }
1538
1539    // get the pkgname and reportfile
1540    pkgname = flNotDir(pkgpath);
1541    pos = pkgname.find('_');
1542    if(pos != string::npos)
1543       pkgname = pkgname.substr(0, pos);
1544
1545    // find the package versin and source package name
1546    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1547    if (Pkg.end() == true)
1548       return;
1549    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1550    if (Ver.end() == true)
1551       return;
1552    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1553    pkgRecords Recs(Cache);
1554    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1555    srcpkgname = Parse.SourcePkg();
1556    if(srcpkgname.empty())
1557       srcpkgname = pkgname;
1558
1559    // if the file exists already, we check:
1560    // - if it was reported already (touched by apport).
1561    //   If not, we do nothing, otherwise
1562    //    we overwrite it. This is the same behaviour as apport
1563    // - if we have a report with the same pkgversion already
1564    //   then we skip it
1565    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1566    if(FileExists(reportfile))
1567    {
1568       struct stat buf;
1569       char strbuf[255];
1570
1571       // check atime/mtime
1572       stat(reportfile.c_str(), &buf);
1573       if(buf.st_mtime > buf.st_atime)
1574          return;
1575
1576       // check if the existing report is the same version
1577       report = fopen(reportfile.c_str(),"r");
1578       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1579       {
1580          if(strstr(strbuf,"Package:") == strbuf)
1581          {
1582             char pkgname[255], version[255];
1583             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1584                if(strcmp(pkgver.c_str(), version) == 0)
1585                {
1586                   fclose(report);
1587                   return;
1588                }
1589          }
1590       }
1591       fclose(report);
1592    }
1593
1594    // now write the report
1595    arch = _config->Find("APT::Architecture");
1596    report = fopen(reportfile.c_str(),"w");
1597    if(report == NULL)
1598       return;
1599    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1600       chmod(reportfile.c_str(), 0);
1601    else
1602       chmod(reportfile.c_str(), 0600);
1603    fprintf(report, "ProblemType: Package\n");
1604    fprintf(report, "Architecture: %s\n", arch.c_str());
1605    time_t now = time(NULL);
1606    fprintf(report, "Date: %s" , ctime(&now));
1607    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1608    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1609    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1610
1611    // ensure that the log is flushed
1612    if(d->term_out)
1613       fflush(d->term_out);
1614
1615    // attach terminal log it if we have it
1616    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1617    if (!logfile_name.empty())
1618    {
1619       FILE *log = NULL;
1620
1621       fprintf(report, "DpkgTerminalLog:\n");
1622       log = fopen(logfile_name.c_str(),"r");
1623       if(log != NULL)
1624       {
1625          char buf[1024];
1626          while( fgets(buf, sizeof(buf), log) != NULL)
1627             fprintf(report, " %s", buf);
1628          fclose(log);
1629       }
1630    }
1631
1632    // log the ordering
1633    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1634    fprintf(report, "AptOrdering:\n");
1635    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1636       if ((*I).Pkg != NULL)
1637          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1638       else
1639          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1640
1641    // attach dmesg log (to learn about segfaults)
1642    if (FileExists("/bin/dmesg"))
1643    {
1644       fprintf(report, "Dmesg:\n");
1645       FILE *log = popen("/bin/dmesg","r");
1646       if(log != NULL)
1647       {
1648          char buf[1024];
1649          while( fgets(buf, sizeof(buf), log) != NULL)
1650             fprintf(report, " %s", buf);
1651          pclose(log);
1652       }
1653    }
1654
1655    // attach df -l log (to learn about filesystem status)
1656    if (FileExists("/bin/df"))
1657    {
1658
1659       fprintf(report, "Df:\n");
1660       FILE *log = popen("/bin/df -l","r");
1661       if(log != NULL)
1662       {
1663          char buf[1024];
1664          while( fgets(buf, sizeof(buf), log) != NULL)
1665             fprintf(report, " %s", buf);
1666          pclose(log);
1667       }
1668    }
1669
1670    fclose(report);
1671
1672 }
1673                                                                         /*}}}*/