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 #include <apt-pkg/install-progress.h>
  23
  24 #include <unistd.h>
  25 #include <stdlib.h>
  26 #include <fcntl.h>
  27 #include <sys/select.h>
  28 #include <sys/stat.h>
  29 #include <sys/types.h>
  30 #include <sys/wait.h>
  31 #include <signal.h>
  32 #include <errno.h>
  33 #include <string.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <algorithm>
  37 #include <sstream>
  38 #include <map>
  39 #include <pwd.h>
  40 #include <grp.h>
  41 #include <iomanip>
  42
  43 #include <termios.h>
  44 #include <unistd.h>
  45 #include <sys/ioctl.h>
  46 #include <pty.h>
  47
  48 #include <apti18n.h>
  49                                                                         /*}}}*/
  50
  51 using namespace std;
  52
  53 class pkgDPkgPMPrivate
  54 {
  55 public:
  56    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  57                         term_out(NULL), history_out(NULL),
  58                         progress(NULL), master(-1), slave(-1)
  59    {
  60       dpkgbuf[0] = '\0';
  61    }
  62    ~pkgDPkgPMPrivate()
  63    {
  64    }
  65    bool stdin_is_dev_null;
  66    // the buffer we use for the dpkg status-fd reading
  67    char dpkgbuf[1024];
  68    int dpkgbuf_pos;
  69    FILE *term_out;
  70    FILE *history_out;
  71    string dpkg_error;
  72    APT::Progress::PackageManager *progress;
  73
  74    // pty stuff
  75    struct       termios tt;
  76    int master;
  77    int slave;
  78
  79    // signals
  80    sigset_t sigmask;
  81    sigset_t original_sigmask;
  82
  83 };
  84
  85 namespace
  86 {
  87   // Maps the dpkg "processing" info to human readable names.  Entry 0
  88   // of each array is the key, entry 1 is the value.
  89   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  90     std::make_pair("install",   N_("Installing %s")),
  91     std::make_pair("configure", N_("Configuring %s")),
  92     std::make_pair("remove",    N_("Removing %s")),
  93     std::make_pair("purge",    N_("Completely removing %s")),
  94     std::make_pair("disappear", N_("Noting disappearance of %s")),
  95     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  96   };
  97
  98   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  99   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
 100
 101   // Predicate to test whether an entry in the PackageProcessingOps
 102   // array matches a string.
 103   class MatchProcessingOp
 104   {
 105     const char *target;
 106
 107   public:
 108     MatchProcessingOp(const char *the_target)
 109       : target(the_target)
 110     {
 111     }
 112
 113     bool operator()(const std::pair<const char *, const char *> &pair) const
 114     {
 115       return strcmp(pair.first, target) == 0;
 116     }
 117   };
 118 }
 119
 120 /* helper function to ionice the given PID
 121
 122  there is no C header for ionice yet - just the syscall interface
 123  so we use the binary from util-linux
 124 */
 125 static bool
 126 ionice(int PID)
 127 {
 128    if (!FileExists("/usr/bin/ionice"))
 129       return false;
 130    pid_t Process = ExecFork();
 131    if (Process == 0)
 132    {
 133       char buf[32];
 134       snprintf(buf, sizeof(buf), "-p%d", PID);
 135       const char *Args[4];
 136       Args[0] = "/usr/bin/ionice";
 137       Args[1] = "-c3";
 138       Args[2] = buf;
 139       Args[3] = 0;
 140       execv(Args[0], (char **)Args);
 141    }
 142    return ExecWait(Process, "ionice");
 143 }
 144
 145 static std::string getDpkgExecutable()
 146 {
 147    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 148    string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 149    size_t dpkgChrootLen = dpkgChrootDir.length();
 150    if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 151    {
 152       if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 153          --dpkgChrootLen;
 154       Tmp = Tmp.substr(dpkgChrootLen);
 155    }
 156    return Tmp;
 157 }
 158
 159 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 160 static void dpkgChrootDirectory()
 161 {
 162    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 163    if (chrootDir == "/")
 164       return;
 165    std::cerr << "Chrooting into " << chrootDir << std::endl;
 166    if (chroot(chrootDir.c_str()) != 0)
 167       _exit(100);
 168    if (chdir("/") != 0)
 169       _exit(100);
 170 }
 171                                                                         /*}}}*/
 172
 173
 174 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 175 // ---------------------------------------------------------------------
 176 /* This is helpful when a package is no longer installed but has residual
 177  * config files
 178  */
 179 static
 180 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 181 {
 182    pkgCache::VerIterator Ver;
 183    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 184    {
 185       pkgCache::VerFileIterator Vf = Ver.FileList();
 186       pkgCache::PkgFileIterator F = Vf.File();
 187       for (F = Vf.File(); F.end() == false; ++F)
 188       {
 189          if (F && F.Archive())
 190          {
 191             if (strcmp(F.Archive(), "now"))
 192                return Ver;
 193          }
 194       }
 195    }
 196    return Ver;
 197 }
 198                                                                         /*}}}*/
 199
 200 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 201 // ---------------------------------------------------------------------
 202 /* */
 203 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 204    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 205 {
 206    d = new pkgDPkgPMPrivate();
 207 }
 208                                                                         /*}}}*/
 209 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 210 // ---------------------------------------------------------------------
 211 /* */
 212 pkgDPkgPM::~pkgDPkgPM()
 213 {
 214    delete d;
 215 }
 216                                                                         /*}}}*/
 217 // DPkgPM::Install - Install a package                                  /*{{{*/
 218 // ---------------------------------------------------------------------
 219 /* Add an install operation to the sequence list */
 220 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 221 {
 222    if (File.empty() == true || Pkg.end() == true)
 223       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 224
 225    // If the filename string begins with DPkg::Chroot-Directory, return the
 226    // substr that is within the chroot so dpkg can access it.
 227    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 228    if (chrootdir != "/" && File.find(chrootdir) == 0)
 229    {
 230       size_t len = chrootdir.length();
 231       if (chrootdir.at(len - 1) == '/')
 232         len--;
 233       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 234    }
 235    else
 236       List.push_back(Item(Item::Install,Pkg,File));
 237
 238    return true;
 239 }
 240                                                                         /*}}}*/
 241 // DPkgPM::Configure - Configure a package                              /*{{{*/
 242 // ---------------------------------------------------------------------
 243 /* Add a configure operation to the sequence list */
 244 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 245 {
 246    if (Pkg.end() == true)
 247       return false;
 248
 249    List.push_back(Item(Item::Configure, Pkg));
 250
 251    // Use triggers for config calls if we configure "smart"
 252    // as otherwise Pre-Depends will not be satisfied, see #526774
 253    if (_config->FindB("DPkg::TriggersPending", false) == true)
 254       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 255
 256    return true;
 257 }
 258                                                                         /*}}}*/
 259 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 260 // ---------------------------------------------------------------------
 261 /* Add a remove operation to the sequence list */
 262 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 263 {
 264    if (Pkg.end() == true)
 265       return false;
 266
 267    if (Purge == true)
 268       List.push_back(Item(Item::Purge,Pkg));
 269    else
 270       List.push_back(Item(Item::Remove,Pkg));
 271    return true;
 272 }
 273                                                                         /*}}}*/
 274 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 275 // ---------------------------------------------------------------------
 276 /* This is part of the helper script communication interface, it sends
 277    very complete information down to the other end of the pipe.*/
 278 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 279 {
 280    return SendPkgsInfo(F, 2);
 281 }
 282 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 283 {
 284    // This version of APT supports only v3, so don't sent higher versions
 285    if (Version <= 3)
 286       fprintf(F,"VERSION %u\n", Version);
 287    else
 288       fprintf(F,"VERSION 3\n");
 289
 290    /* Write out all of the configuration directives by walking the
 291       configuration tree */
 292    const Configuration::Item *Top = _config->Tree(0);
 293    for (; Top != 0;)
 294    {
 295       if (Top->Value.empty() == false)
 296       {
 297          fprintf(F,"%s=%s\n",
 298                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 299                  QuoteString(Top->Value,"\n").c_str());
 300       }
 301
 302       if (Top->Child != 0)
 303       {
 304          Top = Top->Child;
 305          continue;
 306       }
 307
 308       while (Top != 0 && Top->Next == 0)
 309          Top = Top->Parent;
 310       if (Top != 0)
 311          Top = Top->Next;
 312    }
 313    fprintf(F,"\n");
 314
 315    // Write out the package actions in order.
 316    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 317    {
 318       if(I->Pkg.end() == true)
 319          continue;
 320
 321       pkgDepCache::StateCache &S = Cache[I->Pkg];
 322
 323       fprintf(F,"%s ",I->Pkg.Name());
 324
 325       // Current version which we are going to replace
 326       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 327       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 328          CurVer = FindNowVersion(I->Pkg);
 329
 330       if (CurVer.end() == true)
 331       {
 332          if (Version <= 2)
 333             fprintf(F, "- ");
 334          else
 335             fprintf(F, "- - none ");
 336       }
 337       else
 338       {
 339          fprintf(F, "%s ", CurVer.VerStr());
 340          if (Version >= 3)
 341             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 342       }
 343
 344       // Show the compare operator between current and install version
 345       if (S.InstallVer != 0)
 346       {
 347          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 348          int Comp = 2;
 349          if (CurVer.end() == false)
 350             Comp = InstVer.CompareVer(CurVer);
 351          if (Comp < 0)
 352             fprintf(F,"> ");
 353          else if (Comp == 0)
 354             fprintf(F,"= ");
 355          else if (Comp > 0)
 356             fprintf(F,"< ");
 357          fprintf(F, "%s ", InstVer.VerStr());
 358          if (Version >= 3)
 359             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 360       }
 361       else
 362       {
 363          if (Version <= 2)
 364             fprintf(F, "> - ");
 365          else
 366             fprintf(F, "> - - none ");
 367       }
 368
 369       // Show the filename/operation
 370       if (I->Op == Item::Install)
 371       {
 372          // No errors here..
 373          if (I->File[0] != '/')
 374             fprintf(F,"**ERROR**\n");
 375          else
 376             fprintf(F,"%s\n",I->File.c_str());
 377       }
 378       else if (I->Op == Item::Configure)
 379          fprintf(F,"**CONFIGURE**\n");
 380       else if (I->Op == Item::Remove ||
 381           I->Op == Item::Purge)
 382          fprintf(F,"**REMOVE**\n");
 383
 384       if (ferror(F) != 0)
 385          return false;
 386    }
 387    return true;
 388 }
 389                                                                         /*}}}*/
 390 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 391 // ---------------------------------------------------------------------
 392 /* This looks for a list of scripts to run from the configuration file
 393    each one is run and is fed on standard input a list of all .deb files
 394    that are due to be installed. */
 395 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 396 {
 397    Configuration::Item const *Opts = _config->Tree(Cnf);
 398    if (Opts == 0 || Opts->Child == 0)
 399       return true;
 400    Opts = Opts->Child;
 401
 402    unsigned int Count = 1;
 403    for (; Opts != 0; Opts = Opts->Next, Count++)
 404    {
 405       if (Opts->Value.empty() == true)
 406          continue;
 407
 408       // Determine the protocol version
 409       string OptSec = Opts->Value;
 410       string::size_type Pos;
 411       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 412          Pos = OptSec.length();
 413       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 414
 415       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 416       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 417
 418       // Create the pipes
 419       std::set<int> KeepFDs;
 420       int Pipes[2];
 421       if (pipe(Pipes) != 0)
 422          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 423       if (InfoFD != (unsigned)Pipes[0])
 424          SetCloseExec(Pipes[0],true);
 425       else
 426          KeepFDs.insert(Pipes[0]);
 427
 428
 429       SetCloseExec(Pipes[1],true);
 430
 431       // Purified Fork for running the script
 432       pid_t Process = ExecFork(KeepFDs);
 433       if (Process == 0)
 434       {
 435          // Setup the FDs
 436          dup2(Pipes[0], InfoFD);
 437          SetCloseExec(STDOUT_FILENO,false);
 438          SetCloseExec(STDIN_FILENO,false);
 439          SetCloseExec(STDERR_FILENO,false);
 440
 441          string hookfd;
 442          strprintf(hookfd, "%d", InfoFD);
 443          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 444
 445          dpkgChrootDirectory();
 446          const char *Args[4];
 447          Args[0] = "/bin/sh";
 448          Args[1] = "-c";
 449          Args[2] = Opts->Value.c_str();
 450          Args[3] = 0;
 451          execv(Args[0],(char **)Args);
 452          _exit(100);
 453       }
 454       close(Pipes[0]);
 455       FILE *F = fdopen(Pipes[1],"w");
 456       if (F == 0)
 457          return _error->Errno("fdopen","Faild to open new FD");
 458
 459       // Feed it the filenames.
 460       if (Version <= 1)
 461       {
 462          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 463          {
 464             // Only deal with packages to be installed from .deb
 465             if (I->Op != Item::Install)
 466                continue;
 467
 468             // No errors here..
 469             if (I->File[0] != '/')
 470                continue;
 471
 472             /* Feed the filename of each package that is pending install
 473                into the pipe. */
 474             fprintf(F,"%s\n",I->File.c_str());
 475             if (ferror(F) != 0)
 476                break;
 477          }
 478       }
 479       else
 480          SendPkgsInfo(F, Version);
 481
 482       fclose(F);
 483
 484       // Clean up the sub process
 485       if (ExecWait(Process,Opts->Value.c_str()) == false)
 486          return _error->Error("Failure running script %s",Opts->Value.c_str());
 487    }
 488
 489    return true;
 490 }
 491                                                                         /*}}}*/
 492 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 493 // ---------------------------------------------------------------------
 494 /*
 495 */
 496 void pkgDPkgPM::DoStdin(int master)
 497 {
 498    unsigned char input_buf[256] = {0,};
 499    ssize_t len = read(0, input_buf, sizeof(input_buf));
 500    if (len)
 501       FileFd::Write(master, input_buf, len);
 502    else
 503       d->stdin_is_dev_null = true;
 504 }
 505                                                                         /*}}}*/
 506 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 507 // ---------------------------------------------------------------------
 508 /*
 509  * read the terminal pty and write log
 510  */
 511 void pkgDPkgPM::DoTerminalPty(int master)
 512 {
 513    unsigned char term_buf[1024] = {0,0, };
 514
 515    ssize_t len=read(master, term_buf, sizeof(term_buf));
 516    if(len == -1 && errno == EIO)
 517    {
 518       // this happens when the child is about to exit, we
 519       // give it time to actually exit, otherwise we run
 520       // into a race so we sleep for half a second.
 521       struct timespec sleepfor = { 0, 500000000 };
 522       nanosleep(&sleepfor, NULL);
 523       return;
 524    }
 525    if(len <= 0)
 526       return;
 527    FileFd::Write(1, term_buf, len);
 528    if(d->term_out)
 529       fwrite(term_buf, len, sizeof(char), d->term_out);
 530 }
 531                                                                         /*}}}*/
 532 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 533 // ---------------------------------------------------------------------
 534 /*
 535  */
 536 void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
 537 {
 538    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 539    if (Debug == true)
 540       std::clog << "got from dpkg '" << line << "'" << std::endl;
 541
 542    /* dpkg sends strings like this:
 543       'status:   <pkg>: <pkg  qstate>'
 544       'status:   <pkg>:<arch>: <pkg  qstate>'
 545
 546       'processing: {install,configure,remove,purge,disappear,trigproc}: pkg'
 547       'processing: {install,configure,remove,purge,disappear,trigproc}: trigger'
 548    */
 549
 550    // we need to split on ": " (note the appended space) as the ':' is
 551    // part of the pkgname:arch information that dpkg sends
 552    //
 553    // A dpkg error message may contain additional ":" (like
 554    //  "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 555    // so we need to ensure to not split too much
 556    std::vector<std::string> list = StringSplit(line, ": ", 4);
 557    if(list.size() < 3)
 558    {
 559       if (Debug == true)
 560          std::clog << "ignoring line: not enough ':'" << std::endl;
 561       return;
 562    }
 563
 564    // build the (prefix, pkgname, action) tuple, position of this
 565    // is different for "processing" or "status" messages
 566    std::string prefix = APT::String::Strip(list[0]);
 567    std::string pkgname;
 568    std::string action;
 569    ostringstream status;
 570
 571    // "processing" has the form "processing: action: pkg or trigger"
 572    // with action = ["install", "configure", "remove", "purge", "disappear",
 573    //                "trigproc"]
 574    if (prefix == "processing")
 575    {
 576       pkgname = APT::String::Strip(list[2]);
 577       action = APT::String::Strip(list[1]);
 578    }
 579    // "status" has the form: "status: pkg: state"
 580    // with state in ["half-installed", "unpacked", "half-configured",
 581    //                "installed", "config-files", "not-installed"]
 582    else if (prefix == "status")
 583    {
 584       pkgname = APT::String::Strip(list[1]);
 585       action = APT::String::Strip(list[2]);
 586    } else {
 587       if (Debug == true)
 588          std::clog << "unknown prefix '" << prefix << "'" << std::endl;
 589       return;
 590    }
 591
 592
 593    /* handle the special cases first:
 594
 595       errors look like this:
 596       '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
 597       and conffile-prompt like this
 598       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 599    */
 600    if (prefix == "status")
 601    {
 602       if(action == "error")
 603       {
 604          d->progress->Error(list[1], PackagesDone, PackagesTotal,
 605                             list[3]);
 606          pkgFailures++;
 607          WriteApportReport(list[1].c_str(), list[3].c_str());
 608          return;
 609       }
 610       else if(action == "conffile")
 611       {
 612          d->progress->ConffilePrompt(list[1], PackagesDone, PackagesTotal,
 613                                      list[3]);
 614          return;
 615       }
 616    }
 617
 618    // at this point we know that we should have a valid pkgname, so build all
 619    // the info from it
 620
 621    // dpkg does not send always send "pkgname:arch" so we add it here
 622    // if needed
 623    if (pkgname.find(":") == std::string::npos)
 624    {
 625       // find the package in the group that is in a touched by dpkg
 626       // if there are multiple dpkg will send us a full pkgname:arch
 627       pkgCache::GrpIterator Grp = Cache.FindGrp(pkgname);
 628       if (Grp.end() == false)
 629       {
 630           pkgCache::PkgIterator P = Grp.PackageList();
 631           for (; P.end() != true; P = Grp.NextPkg(P))
 632           {
 633               if(Cache[P].Mode != pkgDepCache::ModeKeep)
 634               {
 635                   pkgname = P.FullName();
 636                   break;
 637               }
 638           }
 639       }
 640    }
 641
 642    const char* const pkg = pkgname.c_str();
 643    std::string short_pkgname = StringSplit(pkgname, ":")[0];
 644    std::string arch = "";
 645    if (pkgname.find(":") != string::npos)
 646       arch = StringSplit(pkgname, ":")[1];
 647    std::string i18n_pkgname = pkgname;
 648    if (arch.size() != 0)
 649       strprintf(i18n_pkgname, "%s (%s)", short_pkgname.c_str(), arch.c_str());
 650
 651    // 'processing' from dpkg looks like
 652    // 'processing: action: pkg'
 653    if(prefix == "processing")
 654    {
 655       const std::pair<const char *, const char *> * const iter =
 656         std::find_if(PackageProcessingOpsBegin,
 657                      PackageProcessingOpsEnd,
 658                      MatchProcessingOp(action.c_str()));
 659       if(iter == PackageProcessingOpsEnd)
 660       {
 661          if (Debug == true)
 662             std::clog << "ignoring unknown action: " << action << std::endl;
 663          return;
 664       }
 665       std::string msg;
 666       strprintf(msg, _(iter->second), i18n_pkgname.c_str());
 667       d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 668
 669       // FIXME: this needs a muliarch testcase
 670       // FIXME2: is "pkgname" here reliable with dpkg only sending us
 671       //         short pkgnames?
 672       if (action == "disappear")
 673          handleDisappearAction(pkgname);
 674       return;
 675    }
 676
 677    if (prefix == "status")
 678    {
 679       vector<struct DpkgState> const &states = PackageOps[pkg];
 680       const char *next_action = NULL;
 681       if(PackageOpsDone[pkg] < states.size())
 682          next_action = states[PackageOpsDone[pkg]].state;
 683       // check if the package moved to the next dpkg state
 684       if(next_action && (action == next_action))
 685       {
 686          // only read the translation if there is actually a next
 687          // action
 688          const char *translation = _(states[PackageOpsDone[pkg]].str);
 689          std::string msg;
 690
 691          // we moved from one dpkg state to a new one, report that
 692          PackageOpsDone[pkg]++;
 693          PackagesDone++;
 694
 695          strprintf(msg, translation, i18n_pkgname.c_str());
 696          d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 697
 698       }
 699       if (Debug == true)
 700          std::clog << "(parsed from dpkg) pkg: " << short_pkgname
 701                    << " action: " << action << endl;
 702    }
 703 }
 704                                                                         /*}}}*/
 705 // DPkgPM::handleDisappearAction                                        /*{{{*/
 706 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 707 {
 708    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 709    if (unlikely(Pkg.end() == true))
 710       return;
 711
 712    // record the package name for display and stuff later
 713    disappearedPkgs.insert(Pkg.FullName(true));
 714
 715    // the disappeared package was auto-installed - nothing to do
 716    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 717       return;
 718    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 719    if (unlikely(PkgVer.end() == true))
 720       return;
 721    /* search in the list of dependencies for (Pre)Depends,
 722       check if this dependency has a Replaces on our package
 723       and if so transfer the manual installed flag to it */
 724    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 725    {
 726       if (Dep->Type != pkgCache::Dep::Depends &&
 727           Dep->Type != pkgCache::Dep::PreDepends)
 728          continue;
 729       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 730       if (unlikely(Tar.end() == true))
 731          continue;
 732       // the package is already marked as manual
 733       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 734          continue;
 735       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 736       if (TarVer.end() == true)
 737          continue;
 738       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 739       {
 740          if (Rep->Type != pkgCache::Dep::Replaces)
 741             continue;
 742          if (Pkg != Rep.TargetPkg())
 743             continue;
 744          // okay, they are strongly connected - transfer manual-bit
 745          if (Debug == true)
 746             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 747          Cache[Tar].Flags &= ~Flag::Auto;
 748          break;
 749       }
 750    }
 751 }
 752                                                                         /*}}}*/
 753 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 754 // ---------------------------------------------------------------------
 755 /*
 756  */
 757 void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
 758 {
 759    char *p, *q;
 760    int len;
 761
 762    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 763    d->dpkgbuf_pos += len;
 764    if(len <= 0)
 765       return;
 766
 767    // process line by line if we have a buffer
 768    p = q = d->dpkgbuf;
 769    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 770    {
 771       *q = 0;
 772       ProcessDpkgStatusLine(p);
 773       p=q+1; // continue with next line
 774    }
 775
 776    // now move the unprocessed bits (after the final \n that is now a 0x0)
 777    // to the start and update d->dpkgbuf_pos
 778    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 779    if(p == NULL)
 780       return;
 781
 782    // we are interessted in the first char *after* 0x0
 783    p++;
 784
 785    // move the unprocessed tail to the start and update pos
 786    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 787    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 788 }
 789                                                                         /*}}}*/
 790 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 791 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 792 {
 793    size_t const length = value.length();
 794    if (length == 0)
 795       return;
 796    // poor mans rstrip(", ")
 797    if (value[length-2] == ',' && value[length-1] == ' ')
 798       value.erase(length - 2, 2);
 799    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 800 }                                                                       /*}}}*/
 801 // DPkgPM::OpenLog                                                      /*{{{*/
 802 bool pkgDPkgPM::OpenLog()
 803 {
 804    string const logdir = _config->FindDir("Dir::Log");
 805    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 806       // FIXME: use a better string after freeze
 807       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 808
 809    // get current time
 810    char timestr[200];
 811    time_t const t = time(NULL);
 812    struct tm const * const tmp = localtime(&t);
 813    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 814
 815    // open terminal log
 816    string const logfile_name = flCombine(logdir,
 817                                    _config->Find("Dir::Log::Terminal"));
 818    if (!logfile_name.empty())
 819    {
 820       d->term_out = fopen(logfile_name.c_str(),"a");
 821       if (d->term_out == NULL)
 822          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 823       setvbuf(d->term_out, NULL, _IONBF, 0);
 824       SetCloseExec(fileno(d->term_out), true);
 825       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 826       {
 827          struct passwd *pw = getpwnam("root");
 828          struct group *gr = getgrnam("adm");
 829          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 830             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 831       }
 832       if (chmod(logfile_name.c_str(), 0640) != 0)
 833          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 834       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 835    }
 836
 837    // write your history
 838    string const history_name = flCombine(logdir,
 839                                    _config->Find("Dir::Log::History"));
 840    if (!history_name.empty())
 841    {
 842       d->history_out = fopen(history_name.c_str(),"a");
 843       if (d->history_out == NULL)
 844          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 845       SetCloseExec(fileno(d->history_out), true);
 846       chmod(history_name.c_str(), 0644);
 847       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 848       string remove, purge, install, reinstall, upgrade, downgrade;
 849       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 850       {
 851          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 852          string *line = NULL;
 853          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 854          if (Cache[I].NewInstall() == true)
 855             HISTORYINFO(install, CANDIDATE_AUTO)
 856          else if (Cache[I].ReInstall() == true)
 857             HISTORYINFO(reinstall, CANDIDATE)
 858          else if (Cache[I].Upgrade() == true)
 859             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 860          else if (Cache[I].Downgrade() == true)
 861             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 862          else if (Cache[I].Delete() == true)
 863             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 864          else
 865             continue;
 866          #undef HISTORYINFO
 867          line->append(I.FullName(false)).append(" (");
 868          switch (infostring) {
 869          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 870          case CANDIDATE_AUTO:
 871             line->append(Cache[I].CandVersion);
 872             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 873                line->append(", automatic");
 874             break;
 875          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 876          case CURRENT: line->append(Cache[I].CurVersion); break;
 877          }
 878          line->append("), ");
 879       }
 880       if (_config->Exists("Commandline::AsString") == true)
 881          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 882       WriteHistoryTag("Install", install);
 883       WriteHistoryTag("Reinstall", reinstall);
 884       WriteHistoryTag("Upgrade", upgrade);
 885       WriteHistoryTag("Downgrade",downgrade);
 886       WriteHistoryTag("Remove",remove);
 887       WriteHistoryTag("Purge",purge);
 888       fflush(d->history_out);
 889    }
 890
 891    return true;
 892 }
 893                                                                         /*}}}*/
 894 // DPkg::CloseLog                                                       /*{{{*/
 895 bool pkgDPkgPM::CloseLog()
 896 {
 897    char timestr[200];
 898    time_t t = time(NULL);
 899    struct tm *tmp = localtime(&t);
 900    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 901
 902    if(d->term_out)
 903    {
 904       fprintf(d->term_out, "Log ended: ");
 905       fprintf(d->term_out, "%s", timestr);
 906       fprintf(d->term_out, "\n");
 907       fclose(d->term_out);
 908    }
 909    d->term_out = NULL;
 910
 911    if(d->history_out)
 912    {
 913       if (disappearedPkgs.empty() == false)
 914       {
 915          string disappear;
 916          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 917               d != disappearedPkgs.end(); ++d)
 918          {
 919             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 920             disappear.append(*d);
 921             if (P.end() == true)
 922                disappear.append(", ");
 923             else
 924                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 925          }
 926          WriteHistoryTag("Disappeared", disappear);
 927       }
 928       if (d->dpkg_error.empty() == false)
 929          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 930       fprintf(d->history_out, "End-Date: %s\n", timestr);
 931       fclose(d->history_out);
 932    }
 933    d->history_out = NULL;
 934
 935    return true;
 936 }
 937                                                                         /*}}}*/
 938                                                                         /*}}}*/
 939 /*{{{*/
 940 // This implements a racy version of pselect for those architectures
 941 // that don't have a working implementation.
 942 // FIXME: Probably can be removed on Lenny+1
 943 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 944    fd_set *exceptfds, const struct timespec *timeout,
 945    const sigset_t *sigmask)
 946 {
 947    sigset_t origmask;
 948    struct timeval tv;
 949    int retval;
 950
 951    tv.tv_sec = timeout->tv_sec;
 952    tv.tv_usec = timeout->tv_nsec/1000;
 953
 954    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 955    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 956    sigprocmask(SIG_SETMASK, &origmask, 0);
 957    return retval;
 958 }
 959                                                                         /*}}}*/
 960
 961 // DPkgPM::BuildPackagesProgressMap                                     /*{{{*/
 962 void pkgDPkgPM::BuildPackagesProgressMap()
 963 {
 964    // map the dpkg states to the operations that are performed
 965    // (this is sorted in the same way as Item::Ops)
 966    static const struct DpkgState DpkgStatesOpMap[][7] = {
 967       // Install operation
 968       {
 969          {"half-installed", N_("Preparing %s")},
 970          {"unpacked", N_("Unpacking %s") },
 971          {NULL, NULL}
 972       },
 973       // Configure operation
 974       {
 975          {"unpacked",N_("Preparing to configure %s") },
 976          {"half-configured", N_("Configuring %s") },
 977          { "installed", N_("Installed %s")},
 978          {NULL, NULL}
 979       },
 980       // Remove operation
 981       {
 982          {"half-configured", N_("Preparing for removal of %s")},
 983          {"half-installed", N_("Removing %s")},
 984          {"config-files",  N_("Removed %s")},
 985          {NULL, NULL}
 986       },
 987       // Purge operation
 988       {
 989          {"config-files", N_("Preparing to completely remove %s")},
 990          {"not-installed", N_("Completely removed %s")},
 991          {NULL, NULL}
 992       },
 993    };
 994
 995    // init the PackageOps map, go over the list of packages that
 996    // that will be [installed|configured|removed|purged] and add
 997    // them to the PackageOps map (the dpkg states it goes through)
 998    // and the PackageOpsTranslations (human readable strings)
 999    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1000    {
1001       if((*I).Pkg.end() == true)
1002          continue;
1003
1004       string const name = (*I).Pkg.FullName();
1005       PackageOpsDone[name] = 0;
1006       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1007       {
1008          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1009          PackagesTotal++;
1010       }
1011    }
1012 }
1013                                                                         /*}}}*/
1014 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR < 13)
1015 bool pkgDPkgPM::Go(int StatusFd)
1016 {
1017    APT::Progress::PackageManager *progress = NULL;
1018    if (StatusFd == -1)
1019       progress = APT::Progress::PackageManagerProgressFactory();
1020    else
1021       progress = new APT::Progress::PackageManagerProgressFd(StatusFd);
1022
1023    return GoNoABIBreak(progress);
1024 }
1025 #endif
1026
1027 void pkgDPkgPM::StartPtyMagic()
1028 {
1029    // setup the pty and stuff
1030    struct       winsize win;
1031
1032    // if tcgetattr does not return zero there was a error
1033    // and we do not do any pty magic
1034    _error->PushToStack();
1035    if (tcgetattr(STDOUT_FILENO, &d->tt) == 0)
1036    {
1037        ioctl(1, TIOCGWINSZ, (char *)&win);
1038        if (openpty(&d->master, &d->slave, NULL, &d->tt, &win) < 0)
1039        {
1040            _error->Errno("openpty", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1041            d->master = d->slave = -1;
1042         } else {
1043             struct termios rtt;
1044             rtt = d->tt;
1045             cfmakeraw(&rtt);
1046             rtt.c_lflag &= ~ECHO;
1047             rtt.c_lflag |= ISIG;
1048             // block SIGTTOU during tcsetattr to prevent a hang if
1049             // the process is a member of the background process group
1050             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1051             sigemptyset(&d->sigmask);
1052             sigaddset(&d->sigmask, SIGTTOU);
1053             sigprocmask(SIG_BLOCK,&d->sigmask, &d->original_sigmask);
1054             tcsetattr(0, TCSAFLUSH, &rtt);
1055             sigprocmask(SIG_SETMASK, &d->original_sigmask, 0);
1056         }
1057       }
1058    // complain only if stdout is either a terminal (but still failed) or is an invalid
1059       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1060       else if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1061          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1062
1063       if (_error->PendingError() == true)
1064          _error->DumpErrors(std::cerr);
1065       _error->RevertToStack();
1066 }
1067
1068 void pkgDPkgPM::StopPtyMagic()
1069 {
1070    if(d->slave > 0)
1071       close(d->slave);
1072    if(d->master >= 0)
1073    {
1074       tcsetattr(0, TCSAFLUSH, &d->tt);
1075       close(d->master);
1076    }
1077 }
1078
1079 // DPkgPM::Go - Run the sequence                                        /*{{{*/
1080 // ---------------------------------------------------------------------
1081 /* This globs the operations and calls dpkg
1082  *
1083  * If it is called with a progress object apt will report the install
1084  * progress to this object. It maps the dpkg states a package goes
1085  * through to human readable (and i10n-able)
1086  * names and calculates a percentage for each step.
1087  */
1088 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
1089 bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
1090 #else
1091 bool pkgDPkgPM::GoNoABIBreak(APT::Progress::PackageManager *progress)
1092 #endif
1093 {
1094    pkgPackageManager::SigINTStop = false;
1095    d->progress = progress;
1096
1097    // Generate the base argument list for dpkg
1098    unsigned long StartSize = 0;
1099    std::vector<const char *> Args;
1100    std::string DpkgExecutable = getDpkgExecutable();
1101    Args.push_back(DpkgExecutable.c_str());
1102    StartSize += DpkgExecutable.length();
1103
1104    // Stick in any custom dpkg options
1105    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
1106    if (Opts != 0)
1107    {
1108       Opts = Opts->Child;
1109       for (; Opts != 0; Opts = Opts->Next)
1110       {
1111          if (Opts->Value.empty() == true)
1112             continue;
1113          Args.push_back(Opts->Value.c_str());
1114          StartSize += Opts->Value.length();
1115       }
1116    }
1117
1118    size_t const BaseArgs = Args.size();
1119    // we need to detect if we can qualify packages with the architecture or not
1120    Args.push_back("--assert-multi-arch");
1121    Args.push_back(NULL);
1122
1123    pid_t dpkgAssertMultiArch = ExecFork();
1124    if (dpkgAssertMultiArch == 0)
1125    {
1126       dpkgChrootDirectory();
1127       // redirect everything to the ultimate sink as we only need the exit-status
1128       int const nullfd = open("/dev/null", O_RDONLY);
1129       dup2(nullfd, STDIN_FILENO);
1130       dup2(nullfd, STDOUT_FILENO);
1131       dup2(nullfd, STDERR_FILENO);
1132       execvp(Args[0], (char**) &Args[0]);
1133       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
1134       _exit(2);
1135    }
1136
1137    fd_set rfds;
1138    struct timespec tv;
1139
1140    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
1141    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
1142    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
1143
1144    if (RunScripts("DPkg::Pre-Invoke") == false)
1145       return false;
1146
1147    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
1148       return false;
1149
1150    // support subpressing of triggers processing for special
1151    // cases like d-i that runs the triggers handling manually
1152    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
1153    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
1154    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
1155       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
1156
1157    // for the progress
1158    BuildPackagesProgressMap();
1159
1160    d->stdin_is_dev_null = false;
1161
1162    // create log
1163    OpenLog();
1164
1165    bool dpkgMultiArch = false;
1166    if (dpkgAssertMultiArch > 0)
1167    {
1168       int Status = 0;
1169       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1170       {
1171          if (errno == EINTR)
1172             continue;
1173          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1174          break;
1175       }
1176       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1177          dpkgMultiArch = true;
1178    }
1179
1180    // start pty magic before the loop
1181    StartPtyMagic();
1182
1183    // Tell the progress that its starting and fork dpkg
1184    d->progress->Start();
1185
1186    // this loop is runs once per dpkg operation
1187    vector<Item>::const_iterator I = List.begin();
1188    while (I != List.end())
1189    {
1190       // Do all actions with the same Op in one run
1191       vector<Item>::const_iterator J = I;
1192       if (TriggersPending == true)
1193          for (; J != List.end(); ++J)
1194          {
1195             if (J->Op == I->Op)
1196                continue;
1197             if (J->Op != Item::TriggersPending)
1198                break;
1199             vector<Item>::const_iterator T = J + 1;
1200             if (T != List.end() && T->Op == I->Op)
1201                continue;
1202             break;
1203          }
1204       else
1205          for (; J != List.end() && J->Op == I->Op; ++J)
1206             /* nothing */;
1207
1208       // keep track of allocated strings for multiarch package names
1209       std::vector<char *> Packages;
1210
1211       // start with the baseset of arguments
1212       unsigned long Size = StartSize;
1213       Args.erase(Args.begin() + BaseArgs, Args.end());
1214
1215       // Now check if we are within the MaxArgs limit
1216       //
1217       // this code below is problematic, because it may happen that
1218       // the argument list is split in a way that A depends on B
1219       // and they are in the same "--configure A B" run
1220       // - with the split they may now be configured in different
1221       //   runs, using Immediate-Configure-All can help prevent this.
1222       if (J - I > (signed)MaxArgs)
1223       {
1224          J = I + MaxArgs;
1225          unsigned long const size = MaxArgs + 10;
1226          Args.reserve(size);
1227          Packages.reserve(size);
1228       }
1229       else
1230       {
1231          unsigned long const size = (J - I) + 10;
1232          Args.reserve(size);
1233          Packages.reserve(size);
1234       }
1235
1236       int fd[2];
1237       if (pipe(fd) != 0)
1238          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1239
1240 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1241 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1242
1243       ADDARGC("--status-fd");
1244       char status_fd_buf[20];
1245       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1246       ADDARG(status_fd_buf);
1247       unsigned long const Op = I->Op;
1248
1249       switch (I->Op)
1250       {
1251          case Item::Remove:
1252          ADDARGC("--force-depends");
1253          ADDARGC("--force-remove-essential");
1254          ADDARGC("--remove");
1255          break;
1256
1257          case Item::Purge:
1258          ADDARGC("--force-depends");
1259          ADDARGC("--force-remove-essential");
1260          ADDARGC("--purge");
1261          break;
1262
1263          case Item::Configure:
1264          ADDARGC("--configure");
1265          break;
1266
1267          case Item::ConfigurePending:
1268          ADDARGC("--configure");
1269          ADDARGC("--pending");
1270          break;
1271
1272          case Item::TriggersPending:
1273          ADDARGC("--triggers-only");
1274          ADDARGC("--pending");
1275          break;
1276
1277          case Item::Install:
1278          ADDARGC("--unpack");
1279          ADDARGC("--auto-deconfigure");
1280          break;
1281       }
1282
1283       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1284           I->Op != Item::ConfigurePending)
1285       {
1286          ADDARGC("--no-triggers");
1287       }
1288 #undef ADDARGC
1289
1290       // Write in the file or package names
1291       if (I->Op == Item::Install)
1292       {
1293          for (;I != J && Size < MaxArgBytes; ++I)
1294          {
1295             if (I->File[0] != '/')
1296                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1297             Args.push_back(I->File.c_str());
1298             Size += I->File.length();
1299          }
1300       }
1301       else
1302       {
1303          string const nativeArch = _config->Find("APT::Architecture");
1304          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1305          for (;I != J && Size < MaxArgBytes; ++I)
1306          {
1307             if((*I).Pkg.end() == true)
1308                continue;
1309             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.FullName(true)) != disappearedPkgs.end())
1310                continue;
1311             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1312             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1313                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1314                                            strcmp(I->Pkg.Arch(), "none") == 0))
1315             {
1316                char const * const name = I->Pkg.Name();
1317                ADDARG(name);
1318             }
1319             else
1320             {
1321                pkgCache::VerIterator PkgVer;
1322                std::string name = I->Pkg.Name();
1323                if (Op == Item::Remove || Op == Item::Purge)
1324                {
1325                   PkgVer = I->Pkg.CurrentVer();
1326                   if(PkgVer.end() == true)
1327                      PkgVer = FindNowVersion(I->Pkg);
1328                }
1329                else
1330                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1331                if (strcmp(I->Pkg.Arch(), "none") == 0)
1332                   ; // never arch-qualify a package without an arch
1333                else if (PkgVer.end() == false)
1334                   name.append(":").append(PkgVer.Arch());
1335                else
1336                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1337                char * const fullname = strdup(name.c_str());
1338                Packages.push_back(fullname);
1339                ADDARG(fullname);
1340             }
1341          }
1342          // skip configure action if all sheduled packages disappeared
1343          if (oldSize == Size)
1344             continue;
1345       }
1346 #undef ADDARG
1347
1348       J = I;
1349
1350       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1351       {
1352          for (std::vector<const char *>::const_iterator a = Args.begin();
1353               a != Args.end(); ++a)
1354             clog << *a << ' ';
1355          clog << endl;
1356          continue;
1357       }
1358       Args.push_back(NULL);
1359
1360       cout << flush;
1361       clog << flush;
1362       cerr << flush;
1363
1364       /* Mask off sig int/quit. We do this because dpkg also does when
1365          it forks scripts. What happens is that when you hit ctrl-c it sends
1366          it to all processes in the group. Since dpkg ignores the signal
1367          it doesn't die but we do! So we must also ignore it */
1368       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1369       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1370
1371       // Check here for any SIGINT
1372       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1373          break;
1374
1375
1376       // ignore SIGHUP as well (debian #463030)
1377       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1378
1379       // now run dpkg
1380       d->progress->StartDpkg();
1381       std::set<int> KeepFDs;
1382       KeepFDs.insert(fd[1]);
1383       pid_t Child = ExecFork(KeepFDs);
1384       if (Child == 0)
1385       {
1386          // This is the child
1387          if(d->slave >= 0 && d->master >= 0)
1388          {
1389             setsid();
1390             ioctl(d->slave, TIOCSCTTY, 0);
1391             close(d->master);
1392             dup2(d->slave, 0);
1393             dup2(d->slave, 1);
1394             dup2(d->slave, 2);
1395             close(d->slave);
1396          }
1397          close(fd[0]); // close the read end of the pipe
1398
1399          dpkgChrootDirectory();
1400
1401          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1402             _exit(100);
1403
1404          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1405          {
1406             int Flags,dummy;
1407             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1408                _exit(100);
1409
1410             // Discard everything in stdin before forking dpkg
1411             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1412                _exit(100);
1413
1414             while (read(STDIN_FILENO,&dummy,1) == 1);
1415
1416             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1417                _exit(100);
1418          }
1419
1420          /* No Job Control Stop Env is a magic dpkg var that prevents it
1421             from using sigstop */
1422          putenv((char *)"DPKG_NO_TSTP=yes");
1423          execvp(Args[0], (char**) &Args[0]);
1424          cerr << "Could not exec dpkg!" << endl;
1425          _exit(100);
1426       }
1427
1428       // apply ionice
1429       if (_config->FindB("DPkg::UseIoNice", false) == true)
1430          ionice(Child);
1431
1432       // Wait for dpkg
1433       int Status = 0;
1434
1435       // we read from dpkg here
1436       int const _dpkgin = fd[0];
1437       close(fd[1]);                        // close the write end of the pipe
1438
1439       // setups fds
1440       sigemptyset(&d->sigmask);
1441       sigprocmask(SIG_BLOCK,&d->sigmask,&d->original_sigmask);
1442
1443       /* free vectors (and therefore memory) as we don't need the included data anymore */
1444       for (std::vector<char *>::const_iterator p = Packages.begin();
1445            p != Packages.end(); ++p)
1446          free(*p);
1447       Packages.clear();
1448
1449       // the result of the waitpid call
1450       int res;
1451       int select_ret;
1452       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1453          if(res < 0) {
1454             // FIXME: move this to a function or something, looks ugly here
1455             // error handling, waitpid returned -1
1456             if (errno == EINTR)
1457                continue;
1458             RunScripts("DPkg::Post-Invoke");
1459
1460             // Restore sig int/quit
1461             signal(SIGQUIT,old_SIGQUIT);
1462             signal(SIGINT,old_SIGINT);
1463
1464             signal(SIGHUP,old_SIGHUP);
1465             return _error->Errno("waitpid","Couldn't wait for subprocess");
1466          }
1467
1468          // wait for input or output here
1469          FD_ZERO(&rfds);
1470          if (d->master >= 0 && !d->stdin_is_dev_null)
1471             FD_SET(0, &rfds);
1472          FD_SET(_dpkgin, &rfds);
1473          if(d->master >= 0)
1474             FD_SET(d->master, &rfds);
1475          tv.tv_sec = 0;
1476          tv.tv_nsec = d->progress->GetPulseInterval();
1477          select_ret = pselect(max(d->master, _dpkgin)+1, &rfds, NULL, NULL,
1478                               &tv, &d->original_sigmask);
1479          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1480             select_ret = racy_pselect(max(d->master, _dpkgin)+1, &rfds, NULL,
1481                                       NULL, &tv, &d->original_sigmask);
1482          d->progress->Pulse();
1483          if (select_ret == 0)
1484             continue;
1485          else if (select_ret < 0 && errno == EINTR)
1486             continue;
1487          else if (select_ret < 0)
1488          {
1489             perror("select() returned error");
1490             continue;
1491          }
1492
1493          if(d->master >= 0 && FD_ISSET(d->master, &rfds))
1494             DoTerminalPty(d->master);
1495          if(d->master >= 0 && FD_ISSET(0, &rfds))
1496             DoStdin(d->master);
1497          if(FD_ISSET(_dpkgin, &rfds))
1498             DoDpkgStatusFd(_dpkgin);
1499       }
1500       close(_dpkgin);
1501
1502       // Restore sig int/quit
1503       signal(SIGQUIT,old_SIGQUIT);
1504       signal(SIGINT,old_SIGINT);
1505
1506       signal(SIGHUP,old_SIGHUP);
1507       // Check for an error code.
1508       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1509       {
1510          // if it was set to "keep-dpkg-runing" then we won't return
1511          // here but keep the loop going and just report it as a error
1512          // for later
1513          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1514
1515          if(stopOnError)
1516             RunScripts("DPkg::Post-Invoke");
1517
1518          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1519             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1520          else if (WIFEXITED(Status) != 0)
1521             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1522          else
1523             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1524
1525          if(d->dpkg_error.size() > 0)
1526             _error->Error("%s", d->dpkg_error.c_str());
1527
1528          if(stopOnError)
1529          {
1530             CloseLog();
1531             d->progress->Stop();
1532             return false;
1533          }
1534       }
1535    }
1536    // dpkg is done at this point
1537    d->progress->Stop();
1538    StopPtyMagic();
1539    CloseLog();
1540
1541    if (pkgPackageManager::SigINTStop)
1542        _error->Warning(_("Operation was interrupted before it could finish"));
1543
1544    if (RunScripts("DPkg::Post-Invoke") == false)
1545       return false;
1546
1547    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1548    {
1549       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1550       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1551           unlink(oldpkgcache.c_str()) == 0)
1552       {
1553          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1554          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1555          {
1556             _error->PushToStack();
1557             pkgCacheFile CacheFile;
1558             CacheFile.BuildCaches(NULL, true);
1559             _error->RevertToStack();
1560          }
1561       }
1562    }
1563
1564    Cache.writeStateFile(NULL);
1565    return true;
1566 }
1567
1568 void SigINT(int sig) {
1569    pkgPackageManager::SigINTStop = true;
1570 }
1571                                                                         /*}}}*/
1572 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1573 // ---------------------------------------------------------------------
1574 /* */
1575 void pkgDPkgPM::Reset()
1576 {
1577    List.erase(List.begin(),List.end());
1578 }
1579                                                                         /*}}}*/
1580 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1581 // ---------------------------------------------------------------------
1582 /* */
1583 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1584 {
1585    // If apport doesn't exist or isn't installed do nothing
1586    // This e.g. prevents messages in 'universes' without apport
1587    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1588    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1589       return;
1590
1591    string pkgname, reportfile, srcpkgname, pkgver, arch;
1592    string::size_type pos;
1593    FILE *report;
1594
1595    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1596    {
1597       std::clog << "configured to not write apport reports" << std::endl;
1598       return;
1599    }
1600
1601    // only report the first errors
1602    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1603    {
1604       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1605       return;
1606    }
1607
1608    // check if its not a follow up error
1609    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1610    if(strstr(errormsg, needle) != NULL) {
1611       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1612       return;
1613    }
1614
1615    // do not report disk-full failures
1616    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1617       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1618       return;
1619    }
1620
1621    // do not report out-of-memory failures
1622    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1623       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1624       return;
1625    }
1626
1627    // do not report dpkg I/O errors
1628    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1629    if(strstr(errormsg, "short read in buffer_copy (")) {
1630       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1631       return;
1632    }
1633
1634    // get the pkgname and reportfile
1635    pkgname = flNotDir(pkgpath);
1636    pos = pkgname.find('_');
1637    if(pos != string::npos)
1638       pkgname = pkgname.substr(0, pos);
1639
1640    // find the package versin and source package name
1641    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1642    if (Pkg.end() == true)
1643       return;
1644    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1645    if (Ver.end() == true)
1646       return;
1647    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1648    pkgRecords Recs(Cache);
1649    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1650    srcpkgname = Parse.SourcePkg();
1651    if(srcpkgname.empty())
1652       srcpkgname = pkgname;
1653
1654    // if the file exists already, we check:
1655    // - if it was reported already (touched by apport).
1656    //   If not, we do nothing, otherwise
1657    //    we overwrite it. This is the same behaviour as apport
1658    // - if we have a report with the same pkgversion already
1659    //   then we skip it
1660    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1661    if(FileExists(reportfile))
1662    {
1663       struct stat buf;
1664       char strbuf[255];
1665
1666       // check atime/mtime
1667       stat(reportfile.c_str(), &buf);
1668       if(buf.st_mtime > buf.st_atime)
1669          return;
1670
1671       // check if the existing report is the same version
1672       report = fopen(reportfile.c_str(),"r");
1673       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1674       {
1675          if(strstr(strbuf,"Package:") == strbuf)
1676          {
1677             char pkgname[255], version[255];
1678             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1679                if(strcmp(pkgver.c_str(), version) == 0)
1680                {
1681                   fclose(report);
1682                   return;
1683                }
1684          }
1685       }
1686       fclose(report);
1687    }
1688
1689    // now write the report
1690    arch = _config->Find("APT::Architecture");
1691    report = fopen(reportfile.c_str(),"w");
1692    if(report == NULL)
1693       return;
1694    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1695       chmod(reportfile.c_str(), 0);
1696    else
1697       chmod(reportfile.c_str(), 0600);
1698    fprintf(report, "ProblemType: Package\n");
1699    fprintf(report, "Architecture: %s\n", arch.c_str());
1700    time_t now = time(NULL);
1701    fprintf(report, "Date: %s" , ctime(&now));
1702    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1703    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1704    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1705
1706    // ensure that the log is flushed
1707    if(d->term_out)
1708       fflush(d->term_out);
1709
1710    // attach terminal log it if we have it
1711    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1712    if (!logfile_name.empty())
1713    {
1714       FILE *log = NULL;
1715
1716       fprintf(report, "DpkgTerminalLog:\n");
1717       log = fopen(logfile_name.c_str(),"r");
1718       if(log != NULL)
1719       {
1720          char buf[1024];
1721          while( fgets(buf, sizeof(buf), log) != NULL)
1722             fprintf(report, " %s", buf);
1723          fclose(log);
1724       }
1725    }
1726
1727    // log the ordering
1728    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1729    fprintf(report, "AptOrdering:\n");
1730    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1731       if ((*I).Pkg != NULL)
1732          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1733       else
1734          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1735
1736    // attach dmesg log (to learn about segfaults)
1737    if (FileExists("/bin/dmesg"))
1738    {
1739       fprintf(report, "Dmesg:\n");
1740       FILE *log = popen("/bin/dmesg","r");
1741       if(log != NULL)
1742       {
1743          char buf[1024];
1744          while( fgets(buf, sizeof(buf), log) != NULL)
1745             fprintf(report, " %s", buf);
1746          pclose(log);
1747       }
1748    }
1749
1750    // attach df -l log (to learn about filesystem status)
1751    if (FileExists("/bin/df"))
1752    {
1753
1754       fprintf(report, "Df:\n");
1755       FILE *log = popen("/bin/df -l","r");
1756       if(log != NULL)
1757       {
1758          char buf[1024];
1759          while( fgets(buf, sizeof(buf), log) != NULL)
1760             fprintf(report, " %s", buf);
1761          pclose(log);
1762       }
1763    }
1764
1765    fclose(report);
1766
1767 }
1768                                                                         /*}}}*/