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/cachefile.h>
  14 #include <apt-pkg/configuration.h>
  15 #include <apt-pkg/depcache.h>
  16 #include <apt-pkg/dpkgpm.h>
  17 #include <apt-pkg/error.h>
  18 #include <apt-pkg/fileutl.h>
  19 #include <apt-pkg/install-progress.h>
  20 #include <apt-pkg/packagemanager.h>
  21 #include <apt-pkg/pkgrecords.h>
  22 #include <apt-pkg/strutl.h>
  23 #include <apt-pkg/cacheiterators.h>
  24 #include <apt-pkg/macros.h>
  25 #include <apt-pkg/pkgcache.h>
  26
  27 #include <errno.h>
  28 #include <fcntl.h>
  29 #include <grp.h>
  30 #include <pty.h>
  31 #include <pwd.h>
  32 #include <signal.h>
  33 #include <stddef.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/select.h>
  38 #include <sys/stat.h>
  39 #include <sys/time.h>
  40 #include <sys/wait.h>
  41 #include <termios.h>
  42 #include <time.h>
  43 #include <unistd.h>
  44 #include <algorithm>
  45 #include <cstring>
  46 #include <iostream>
  47 #include <map>
  48 #include <set>
  49 #include <string>
  50 #include <utility>
  51 #include <vector>
  52
  53 #include <apti18n.h>
  54                                                                         /*}}}*/
  55
  56 using namespace std;
  57
  58 class pkgDPkgPMPrivate
  59 {
  60 public:
  61    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  62                         term_out(NULL), history_out(NULL),
  63                         progress(NULL), master(-1), slave(-1)
  64    {
  65       dpkgbuf[0] = '\0';
  66    }
  67    ~pkgDPkgPMPrivate()
  68    {
  69    }
  70    bool stdin_is_dev_null;
  71    // the buffer we use for the dpkg status-fd reading
  72    char dpkgbuf[1024];
  73    int dpkgbuf_pos;
  74    FILE *term_out;
  75    FILE *history_out;
  76    string dpkg_error;
  77    APT::Progress::PackageManager *progress;
  78
  79    // pty stuff
  80    struct       termios tt;
  81    int master;
  82    int slave;
  83
  84    // signals
  85    sigset_t sigmask;
  86    sigset_t original_sigmask;
  87
  88 };
  89
  90 namespace
  91 {
  92   // Maps the dpkg "processing" info to human readable names.  Entry 0
  93   // of each array is the key, entry 1 is the value.
  94   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  95     std::make_pair("install",   N_("Installing %s")),
  96     std::make_pair("configure", N_("Configuring %s")),
  97     std::make_pair("remove",    N_("Removing %s")),
  98     std::make_pair("purge",    N_("Completely removing %s")),
  99     std::make_pair("disappear", N_("Noting disappearance of %s")),
 100     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
 101   };
 102
 103   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
 104   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
 105
 106   // Predicate to test whether an entry in the PackageProcessingOps
 107   // array matches a string.
 108   class MatchProcessingOp
 109   {
 110     const char *target;
 111
 112   public:
 113     MatchProcessingOp(const char *the_target)
 114       : target(the_target)
 115     {
 116     }
 117
 118     bool operator()(const std::pair<const char *, const char *> &pair) const
 119     {
 120       return strcmp(pair.first, target) == 0;
 121     }
 122   };
 123 }
 124
 125 /* helper function to ionice the given PID
 126
 127  there is no C header for ionice yet - just the syscall interface
 128  so we use the binary from util-linux
 129 */
 130 static bool
 131 ionice(int PID)
 132 {
 133    if (!FileExists("/usr/bin/ionice"))
 134       return false;
 135    pid_t Process = ExecFork();
 136    if (Process == 0)
 137    {
 138       char buf[32];
 139       snprintf(buf, sizeof(buf), "-p%d", PID);
 140       const char *Args[4];
 141       Args[0] = "/usr/bin/ionice";
 142       Args[1] = "-c3";
 143       Args[2] = buf;
 144       Args[3] = 0;
 145       execv(Args[0], (char **)Args);
 146    }
 147    return ExecWait(Process, "ionice");
 148 }
 149
 150 static std::string getDpkgExecutable()
 151 {
 152    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 153    string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 154    size_t dpkgChrootLen = dpkgChrootDir.length();
 155    if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 156    {
 157       if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 158          --dpkgChrootLen;
 159       Tmp = Tmp.substr(dpkgChrootLen);
 160    }
 161    return Tmp;
 162 }
 163
 164 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 165 static void dpkgChrootDirectory()
 166 {
 167    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 168    if (chrootDir == "/")
 169       return;
 170    std::cerr << "Chrooting into " << chrootDir << std::endl;
 171    if (chroot(chrootDir.c_str()) != 0)
 172       _exit(100);
 173    if (chdir("/") != 0)
 174       _exit(100);
 175 }
 176                                                                         /*}}}*/
 177
 178
 179 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 180 // ---------------------------------------------------------------------
 181 /* This is helpful when a package is no longer installed but has residual
 182  * config files
 183  */
 184 static
 185 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 186 {
 187    pkgCache::VerIterator Ver;
 188    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 189    {
 190       pkgCache::VerFileIterator Vf = Ver.FileList();
 191       pkgCache::PkgFileIterator F = Vf.File();
 192       for (F = Vf.File(); F.end() == false; ++F)
 193       {
 194          if (F && F.Archive())
 195          {
 196             if (strcmp(F.Archive(), "now"))
 197                return Ver;
 198          }
 199       }
 200    }
 201    return Ver;
 202 }
 203                                                                         /*}}}*/
 204
 205 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 206 // ---------------------------------------------------------------------
 207 /* */
 208 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 209    : pkgPackageManager(Cache), pkgFailures(0), PackagesDone(0), PackagesTotal(0)
 210 {
 211    d = new pkgDPkgPMPrivate();
 212 }
 213                                                                         /*}}}*/
 214 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 215 // ---------------------------------------------------------------------
 216 /* */
 217 pkgDPkgPM::~pkgDPkgPM()
 218 {
 219    delete d;
 220 }
 221                                                                         /*}}}*/
 222 // DPkgPM::Install - Install a package                                  /*{{{*/
 223 // ---------------------------------------------------------------------
 224 /* Add an install operation to the sequence list */
 225 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 226 {
 227    if (File.empty() == true || Pkg.end() == true)
 228       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 229
 230    // If the filename string begins with DPkg::Chroot-Directory, return the
 231    // substr that is within the chroot so dpkg can access it.
 232    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 233    if (chrootdir != "/" && File.find(chrootdir) == 0)
 234    {
 235       size_t len = chrootdir.length();
 236       if (chrootdir.at(len - 1) == '/')
 237         len--;
 238       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 239    }
 240    else
 241       List.push_back(Item(Item::Install,Pkg,File));
 242
 243    return true;
 244 }
 245                                                                         /*}}}*/
 246 // DPkgPM::Configure - Configure a package                              /*{{{*/
 247 // ---------------------------------------------------------------------
 248 /* Add a configure operation to the sequence list */
 249 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 250 {
 251    if (Pkg.end() == true)
 252       return false;
 253
 254    List.push_back(Item(Item::Configure, Pkg));
 255
 256    // Use triggers for config calls if we configure "smart"
 257    // as otherwise Pre-Depends will not be satisfied, see #526774
 258    if (_config->FindB("DPkg::TriggersPending", false) == true)
 259       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 260
 261    return true;
 262 }
 263                                                                         /*}}}*/
 264 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 265 // ---------------------------------------------------------------------
 266 /* Add a remove operation to the sequence list */
 267 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 268 {
 269    if (Pkg.end() == true)
 270       return false;
 271
 272    if (Purge == true)
 273       List.push_back(Item(Item::Purge,Pkg));
 274    else
 275       List.push_back(Item(Item::Remove,Pkg));
 276    return true;
 277 }
 278                                                                         /*}}}*/
 279 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 280 // ---------------------------------------------------------------------
 281 /* This is part of the helper script communication interface, it sends
 282    very complete information down to the other end of the pipe.*/
 283 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 284 {
 285    return SendPkgsInfo(F, 2);
 286 }
 287 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 288 {
 289    // This version of APT supports only v3, so don't sent higher versions
 290    if (Version <= 3)
 291       fprintf(F,"VERSION %u\n", Version);
 292    else
 293       fprintf(F,"VERSION 3\n");
 294
 295    /* Write out all of the configuration directives by walking the
 296       configuration tree */
 297    const Configuration::Item *Top = _config->Tree(0);
 298    for (; Top != 0;)
 299    {
 300       if (Top->Value.empty() == false)
 301       {
 302          fprintf(F,"%s=%s\n",
 303                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 304                  QuoteString(Top->Value,"\n").c_str());
 305       }
 306
 307       if (Top->Child != 0)
 308       {
 309          Top = Top->Child;
 310          continue;
 311       }
 312
 313       while (Top != 0 && Top->Next == 0)
 314          Top = Top->Parent;
 315       if (Top != 0)
 316          Top = Top->Next;
 317    }
 318    fprintf(F,"\n");
 319
 320    // Write out the package actions in order.
 321    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 322    {
 323       if(I->Pkg.end() == true)
 324          continue;
 325
 326       pkgDepCache::StateCache &S = Cache[I->Pkg];
 327
 328       fprintf(F,"%s ",I->Pkg.Name());
 329
 330       // Current version which we are going to replace
 331       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 332       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 333          CurVer = FindNowVersion(I->Pkg);
 334
 335       if (CurVer.end() == true)
 336       {
 337          if (Version <= 2)
 338             fprintf(F, "- ");
 339          else
 340             fprintf(F, "- - none ");
 341       }
 342       else
 343       {
 344          fprintf(F, "%s ", CurVer.VerStr());
 345          if (Version >= 3)
 346             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 347       }
 348
 349       // Show the compare operator between current and install version
 350       if (S.InstallVer != 0)
 351       {
 352          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 353          int Comp = 2;
 354          if (CurVer.end() == false)
 355             Comp = InstVer.CompareVer(CurVer);
 356          if (Comp < 0)
 357             fprintf(F,"> ");
 358          else if (Comp == 0)
 359             fprintf(F,"= ");
 360          else if (Comp > 0)
 361             fprintf(F,"< ");
 362          fprintf(F, "%s ", InstVer.VerStr());
 363          if (Version >= 3)
 364             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 365       }
 366       else
 367       {
 368          if (Version <= 2)
 369             fprintf(F, "> - ");
 370          else
 371             fprintf(F, "> - - none ");
 372       }
 373
 374       // Show the filename/operation
 375       if (I->Op == Item::Install)
 376       {
 377          // No errors here..
 378          if (I->File[0] != '/')
 379             fprintf(F,"**ERROR**\n");
 380          else
 381             fprintf(F,"%s\n",I->File.c_str());
 382       }
 383       else if (I->Op == Item::Configure)
 384          fprintf(F,"**CONFIGURE**\n");
 385       else if (I->Op == Item::Remove ||
 386           I->Op == Item::Purge)
 387          fprintf(F,"**REMOVE**\n");
 388
 389       if (ferror(F) != 0)
 390          return false;
 391    }
 392    return true;
 393 }
 394                                                                         /*}}}*/
 395 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 396 // ---------------------------------------------------------------------
 397 /* This looks for a list of scripts to run from the configuration file
 398    each one is run and is fed on standard input a list of all .deb files
 399    that are due to be installed. */
 400 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 401 {
 402    Configuration::Item const *Opts = _config->Tree(Cnf);
 403    if (Opts == 0 || Opts->Child == 0)
 404       return true;
 405    Opts = Opts->Child;
 406
 407    unsigned int Count = 1;
 408    for (; Opts != 0; Opts = Opts->Next, Count++)
 409    {
 410       if (Opts->Value.empty() == true)
 411          continue;
 412
 413       if(_config->FindB("Debug::RunScripts", false) == true)
 414          std::clog << "Running external script with list of all .deb file: '"
 415                    << Opts->Value << "'" << std::endl;
 416
 417       // Determine the protocol version
 418       string OptSec = Opts->Value;
 419       string::size_type Pos;
 420       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 421          Pos = OptSec.length();
 422       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 423
 424       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 425       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 426
 427       // Create the pipes
 428       std::set<int> KeepFDs;
 429       MergeKeepFdsFromConfiguration(KeepFDs);
 430       int Pipes[2];
 431       if (pipe(Pipes) != 0)
 432          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 433       if (InfoFD != (unsigned)Pipes[0])
 434          SetCloseExec(Pipes[0],true);
 435       else
 436          KeepFDs.insert(Pipes[0]);
 437
 438
 439       SetCloseExec(Pipes[1],true);
 440
 441       // Purified Fork for running the script
 442       pid_t Process = ExecFork(KeepFDs);
 443       if (Process == 0)
 444       {
 445          // Setup the FDs
 446          dup2(Pipes[0], InfoFD);
 447          SetCloseExec(STDOUT_FILENO,false);
 448          SetCloseExec(STDIN_FILENO,false);
 449          SetCloseExec(STDERR_FILENO,false);
 450
 451          string hookfd;
 452          strprintf(hookfd, "%d", InfoFD);
 453          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 454
 455          dpkgChrootDirectory();
 456          const char *Args[4];
 457          Args[0] = "/bin/sh";
 458          Args[1] = "-c";
 459          Args[2] = Opts->Value.c_str();
 460          Args[3] = 0;
 461          execv(Args[0],(char **)Args);
 462          _exit(100);
 463       }
 464       close(Pipes[0]);
 465       FILE *F = fdopen(Pipes[1],"w");
 466       if (F == 0)
 467          return _error->Errno("fdopen","Faild to open new FD");
 468
 469       // Feed it the filenames.
 470       if (Version <= 1)
 471       {
 472          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 473          {
 474             // Only deal with packages to be installed from .deb
 475             if (I->Op != Item::Install)
 476                continue;
 477
 478             // No errors here..
 479             if (I->File[0] != '/')
 480                continue;
 481
 482             /* Feed the filename of each package that is pending install
 483                into the pipe. */
 484             fprintf(F,"%s\n",I->File.c_str());
 485             if (ferror(F) != 0)
 486                break;
 487          }
 488       }
 489       else
 490          SendPkgsInfo(F, Version);
 491
 492       fclose(F);
 493
 494       // Clean up the sub process
 495       if (ExecWait(Process,Opts->Value.c_str()) == false)
 496          return _error->Error("Failure running script %s",Opts->Value.c_str());
 497    }
 498
 499    return true;
 500 }
 501                                                                         /*}}}*/
 502 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 503 // ---------------------------------------------------------------------
 504 /*
 505 */
 506 void pkgDPkgPM::DoStdin(int master)
 507 {
 508    unsigned char input_buf[256] = {0,};
 509    ssize_t len = read(0, input_buf, sizeof(input_buf));
 510    if (len)
 511       FileFd::Write(master, input_buf, len);
 512    else
 513       d->stdin_is_dev_null = true;
 514 }
 515                                                                         /*}}}*/
 516 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 517 // ---------------------------------------------------------------------
 518 /*
 519  * read the terminal pty and write log
 520  */
 521 void pkgDPkgPM::DoTerminalPty(int master)
 522 {
 523    unsigned char term_buf[1024] = {0,0, };
 524
 525    ssize_t len=read(master, term_buf, sizeof(term_buf));
 526    if(len == -1 && errno == EIO)
 527    {
 528       // this happens when the child is about to exit, we
 529       // give it time to actually exit, otherwise we run
 530       // into a race so we sleep for half a second.
 531       struct timespec sleepfor = { 0, 500000000 };
 532       nanosleep(&sleepfor, NULL);
 533       return;
 534    }
 535    if(len <= 0)
 536       return;
 537    FileFd::Write(1, term_buf, len);
 538    if(d->term_out)
 539       fwrite(term_buf, len, sizeof(char), d->term_out);
 540 }
 541                                                                         /*}}}*/
 542 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 543 // ---------------------------------------------------------------------
 544 /*
 545  */
 546 void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
 547 {
 548    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 549    if (Debug == true)
 550       std::clog << "got from dpkg '" << line << "'" << std::endl;
 551
 552    /* dpkg sends strings like this:
 553       'status:   <pkg>: <pkg  qstate>'
 554       'status:   <pkg>:<arch>: <pkg  qstate>'
 555
 556       'processing: {install,configure,remove,purge,disappear,trigproc}: pkg'
 557       'processing: {install,configure,remove,purge,disappear,trigproc}: trigger'
 558    */
 559
 560    // we need to split on ": " (note the appended space) as the ':' is
 561    // part of the pkgname:arch information that dpkg sends
 562    //
 563    // A dpkg error message may contain additional ":" (like
 564    //  "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 565    // so we need to ensure to not split too much
 566    std::vector<std::string> list = StringSplit(line, ": ", 4);
 567    if(list.size() < 3)
 568    {
 569       if (Debug == true)
 570          std::clog << "ignoring line: not enough ':'" << std::endl;
 571       return;
 572    }
 573
 574    // build the (prefix, pkgname, action) tuple, position of this
 575    // is different for "processing" or "status" messages
 576    std::string prefix = APT::String::Strip(list[0]);
 577    std::string pkgname;
 578    std::string action;
 579
 580    // "processing" has the form "processing: action: pkg or trigger"
 581    // with action = ["install", "configure", "remove", "purge", "disappear",
 582    //                "trigproc"]
 583    if (prefix == "processing")
 584    {
 585       pkgname = APT::String::Strip(list[2]);
 586       action = APT::String::Strip(list[1]);
 587    }
 588    // "status" has the form: "status: pkg: state"
 589    // with state in ["half-installed", "unpacked", "half-configured",
 590    //                "installed", "config-files", "not-installed"]
 591    else if (prefix == "status")
 592    {
 593       pkgname = APT::String::Strip(list[1]);
 594       action = APT::String::Strip(list[2]);
 595    } else {
 596       if (Debug == true)
 597          std::clog << "unknown prefix '" << prefix << "'" << std::endl;
 598       return;
 599    }
 600
 601
 602    /* handle the special cases first:
 603
 604       errors look like this:
 605       '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
 606       and conffile-prompt like this
 607       'status:/etc/compiz.conf/compiz.conf :  conffile-prompt: 'current-conffile' 'new-conffile' useredited distedited
 608    */
 609    if (prefix == "status")
 610    {
 611       if(action == "error")
 612       {
 613          d->progress->Error(list[1], PackagesDone, PackagesTotal,
 614                             list[3]);
 615          pkgFailures++;
 616          WriteApportReport(list[1].c_str(), list[3].c_str());
 617          return;
 618       }
 619       else if(action == "conffile-prompt")
 620       {
 621          d->progress->ConffilePrompt(list[1], PackagesDone, PackagesTotal,
 622                                      list[3]);
 623          return;
 624       }
 625    }
 626
 627    // at this point we know that we should have a valid pkgname, so build all
 628    // the info from it
 629
 630    // dpkg does not send always send "pkgname:arch" so we add it here
 631    // if needed
 632    if (pkgname.find(":") == std::string::npos)
 633    {
 634       // find the package in the group that is in a touched by dpkg
 635       // if there are multiple dpkg will send us a full pkgname:arch
 636       pkgCache::GrpIterator Grp = Cache.FindGrp(pkgname);
 637       if (Grp.end() == false)
 638       {
 639           pkgCache::PkgIterator P = Grp.PackageList();
 640           for (; P.end() != true; P = Grp.NextPkg(P))
 641           {
 642               if(Cache[P].Mode != pkgDepCache::ModeKeep)
 643               {
 644                   pkgname = P.FullName();
 645                   break;
 646               }
 647           }
 648       }
 649    }
 650
 651    const char* const pkg = pkgname.c_str();
 652    std::string short_pkgname = StringSplit(pkgname, ":")[0];
 653    std::string arch = "";
 654    if (pkgname.find(":") != string::npos)
 655       arch = StringSplit(pkgname, ":")[1];
 656    std::string i18n_pkgname = pkgname;
 657    if (arch.size() != 0)
 658       strprintf(i18n_pkgname, "%s (%s)", short_pkgname.c_str(), arch.c_str());
 659
 660    // 'processing' from dpkg looks like
 661    // 'processing: action: pkg'
 662    if(prefix == "processing")
 663    {
 664       const std::pair<const char *, const char *> * const iter =
 665         std::find_if(PackageProcessingOpsBegin,
 666                      PackageProcessingOpsEnd,
 667                      MatchProcessingOp(action.c_str()));
 668       if(iter == PackageProcessingOpsEnd)
 669       {
 670          if (Debug == true)
 671             std::clog << "ignoring unknown action: " << action << std::endl;
 672          return;
 673       }
 674       std::string msg;
 675       strprintf(msg, _(iter->second), i18n_pkgname.c_str());
 676       d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 677
 678       // FIXME: this needs a muliarch testcase
 679       // FIXME2: is "pkgname" here reliable with dpkg only sending us
 680       //         short pkgnames?
 681       if (action == "disappear")
 682          handleDisappearAction(pkgname);
 683       return;
 684    }
 685
 686    if (prefix == "status")
 687    {
 688       vector<struct DpkgState> const &states = PackageOps[pkg];
 689       const char *next_action = NULL;
 690       if(PackageOpsDone[pkg] < states.size())
 691          next_action = states[PackageOpsDone[pkg]].state;
 692       // check if the package moved to the next dpkg state
 693       if(next_action && (action == next_action))
 694       {
 695          // only read the translation if there is actually a next
 696          // action
 697          const char *translation = _(states[PackageOpsDone[pkg]].str);
 698          std::string msg;
 699
 700          // we moved from one dpkg state to a new one, report that
 701          PackageOpsDone[pkg]++;
 702          PackagesDone++;
 703
 704          strprintf(msg, translation, i18n_pkgname.c_str());
 705          d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 706
 707       }
 708       if (Debug == true)
 709          std::clog << "(parsed from dpkg) pkg: " << short_pkgname
 710                    << " action: " << action << endl;
 711    }
 712 }
 713                                                                         /*}}}*/
 714 // DPkgPM::handleDisappearAction                                        /*{{{*/
 715 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 716 {
 717    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 718    if (unlikely(Pkg.end() == true))
 719       return;
 720
 721    // record the package name for display and stuff later
 722    disappearedPkgs.insert(Pkg.FullName(true));
 723
 724    // the disappeared package was auto-installed - nothing to do
 725    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 726       return;
 727    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 728    if (unlikely(PkgVer.end() == true))
 729       return;
 730    /* search in the list of dependencies for (Pre)Depends,
 731       check if this dependency has a Replaces on our package
 732       and if so transfer the manual installed flag to it */
 733    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 734    {
 735       if (Dep->Type != pkgCache::Dep::Depends &&
 736           Dep->Type != pkgCache::Dep::PreDepends)
 737          continue;
 738       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 739       if (unlikely(Tar.end() == true))
 740          continue;
 741       // the package is already marked as manual
 742       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 743          continue;
 744       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 745       if (TarVer.end() == true)
 746          continue;
 747       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 748       {
 749          if (Rep->Type != pkgCache::Dep::Replaces)
 750             continue;
 751          if (Pkg != Rep.TargetPkg())
 752             continue;
 753          // okay, they are strongly connected - transfer manual-bit
 754          if (Debug == true)
 755             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 756          Cache[Tar].Flags &= ~Flag::Auto;
 757          break;
 758       }
 759    }
 760 }
 761                                                                         /*}}}*/
 762 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 763 // ---------------------------------------------------------------------
 764 /*
 765  */
 766 void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
 767 {
 768    char *p, *q;
 769    int len;
 770
 771    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 772    d->dpkgbuf_pos += len;
 773    if(len <= 0)
 774       return;
 775
 776    // process line by line if we have a buffer
 777    p = q = d->dpkgbuf;
 778    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 779    {
 780       *q = 0;
 781       ProcessDpkgStatusLine(p);
 782       p=q+1; // continue with next line
 783    }
 784
 785    // now move the unprocessed bits (after the final \n that is now a 0x0)
 786    // to the start and update d->dpkgbuf_pos
 787    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 788    if(p == NULL)
 789       return;
 790
 791    // we are interessted in the first char *after* 0x0
 792    p++;
 793
 794    // move the unprocessed tail to the start and update pos
 795    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 796    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 797 }
 798                                                                         /*}}}*/
 799 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 800 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 801 {
 802    size_t const length = value.length();
 803    if (length == 0)
 804       return;
 805    // poor mans rstrip(", ")
 806    if (value[length-2] == ',' && value[length-1] == ' ')
 807       value.erase(length - 2, 2);
 808    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 809 }                                                                       /*}}}*/
 810 // DPkgPM::OpenLog                                                      /*{{{*/
 811 bool pkgDPkgPM::OpenLog()
 812 {
 813    string const logdir = _config->FindDir("Dir::Log");
 814    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 815       // FIXME: use a better string after freeze
 816       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 817
 818    // get current time
 819    char timestr[200];
 820    time_t const t = time(NULL);
 821    struct tm const * const tmp = localtime(&t);
 822    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 823
 824    // open terminal log
 825    string const logfile_name = flCombine(logdir,
 826                                    _config->Find("Dir::Log::Terminal"));
 827    if (!logfile_name.empty())
 828    {
 829       d->term_out = fopen(logfile_name.c_str(),"a");
 830       if (d->term_out == NULL)
 831          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 832       setvbuf(d->term_out, NULL, _IONBF, 0);
 833       SetCloseExec(fileno(d->term_out), true);
 834       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 835       {
 836          struct passwd *pw = getpwnam("root");
 837          struct group *gr = getgrnam("adm");
 838          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 839             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 840       }
 841       if (chmod(logfile_name.c_str(), 0640) != 0)
 842          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 843       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 844    }
 845
 846    // write your history
 847    string const history_name = flCombine(logdir,
 848                                    _config->Find("Dir::Log::History"));
 849    if (!history_name.empty())
 850    {
 851       d->history_out = fopen(history_name.c_str(),"a");
 852       if (d->history_out == NULL)
 853          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 854       SetCloseExec(fileno(d->history_out), true);
 855       chmod(history_name.c_str(), 0644);
 856       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 857       string remove, purge, install, reinstall, upgrade, downgrade;
 858       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 859       {
 860          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 861          string *line = NULL;
 862          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 863          if (Cache[I].NewInstall() == true)
 864             HISTORYINFO(install, CANDIDATE_AUTO)
 865          else if (Cache[I].ReInstall() == true)
 866             HISTORYINFO(reinstall, CANDIDATE)
 867          else if (Cache[I].Upgrade() == true)
 868             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 869          else if (Cache[I].Downgrade() == true)
 870             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 871          else if (Cache[I].Delete() == true)
 872             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 873          else
 874             continue;
 875          #undef HISTORYINFO
 876          line->append(I.FullName(false)).append(" (");
 877          switch (infostring) {
 878          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 879          case CANDIDATE_AUTO:
 880             line->append(Cache[I].CandVersion);
 881             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 882                line->append(", automatic");
 883             break;
 884          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 885          case CURRENT: line->append(Cache[I].CurVersion); break;
 886          }
 887          line->append("), ");
 888       }
 889       if (_config->Exists("Commandline::AsString") == true)
 890          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 891       WriteHistoryTag("Install", install);
 892       WriteHistoryTag("Reinstall", reinstall);
 893       WriteHistoryTag("Upgrade", upgrade);
 894       WriteHistoryTag("Downgrade",downgrade);
 895       WriteHistoryTag("Remove",remove);
 896       WriteHistoryTag("Purge",purge);
 897       fflush(d->history_out);
 898    }
 899
 900    return true;
 901 }
 902                                                                         /*}}}*/
 903 // DPkg::CloseLog                                                       /*{{{*/
 904 bool pkgDPkgPM::CloseLog()
 905 {
 906    char timestr[200];
 907    time_t t = time(NULL);
 908    struct tm *tmp = localtime(&t);
 909    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 910
 911    if(d->term_out)
 912    {
 913       fprintf(d->term_out, "Log ended: ");
 914       fprintf(d->term_out, "%s", timestr);
 915       fprintf(d->term_out, "\n");
 916       fclose(d->term_out);
 917    }
 918    d->term_out = NULL;
 919
 920    if(d->history_out)
 921    {
 922       if (disappearedPkgs.empty() == false)
 923       {
 924          string disappear;
 925          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 926               d != disappearedPkgs.end(); ++d)
 927          {
 928             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 929             disappear.append(*d);
 930             if (P.end() == true)
 931                disappear.append(", ");
 932             else
 933                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 934          }
 935          WriteHistoryTag("Disappeared", disappear);
 936       }
 937       if (d->dpkg_error.empty() == false)
 938          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 939       fprintf(d->history_out, "End-Date: %s\n", timestr);
 940       fclose(d->history_out);
 941    }
 942    d->history_out = NULL;
 943
 944    return true;
 945 }
 946                                                                         /*}}}*/
 947                                                                         /*}}}*/
 948 /*{{{*/
 949 // This implements a racy version of pselect for those architectures
 950 // that don't have a working implementation.
 951 // FIXME: Probably can be removed on Lenny+1
 952 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 953    fd_set *exceptfds, const struct timespec *timeout,
 954    const sigset_t *sigmask)
 955 {
 956    sigset_t origmask;
 957    struct timeval tv;
 958    int retval;
 959
 960    tv.tv_sec = timeout->tv_sec;
 961    tv.tv_usec = timeout->tv_nsec/1000;
 962
 963    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 964    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 965    sigprocmask(SIG_SETMASK, &origmask, 0);
 966    return retval;
 967 }
 968                                                                         /*}}}*/
 969
 970 // DPkgPM::BuildPackagesProgressMap                                     /*{{{*/
 971 void pkgDPkgPM::BuildPackagesProgressMap()
 972 {
 973    // map the dpkg states to the operations that are performed
 974    // (this is sorted in the same way as Item::Ops)
 975    static const struct DpkgState DpkgStatesOpMap[][7] = {
 976       // Install operation
 977       {
 978          {"half-installed", N_("Preparing %s")},
 979          {"unpacked", N_("Unpacking %s") },
 980          {NULL, NULL}
 981       },
 982       // Configure operation
 983       {
 984          {"unpacked",N_("Preparing to configure %s") },
 985          {"half-configured", N_("Configuring %s") },
 986          { "installed", N_("Installed %s")},
 987          {NULL, NULL}
 988       },
 989       // Remove operation
 990       {
 991          {"half-configured", N_("Preparing for removal of %s")},
 992          {"half-installed", N_("Removing %s")},
 993          {"config-files",  N_("Removed %s")},
 994          {NULL, NULL}
 995       },
 996       // Purge operation
 997       {
 998          {"config-files", N_("Preparing to completely remove %s")},
 999          {"not-installed", N_("Completely removed %s")},
1000          {NULL, NULL}
1001       },
1002    };
1003
1004    // init the PackageOps map, go over the list of packages that
1005    // that will be [installed|configured|removed|purged] and add
1006    // them to the PackageOps map (the dpkg states it goes through)
1007    // and the PackageOpsTranslations (human readable strings)
1008    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1009    {
1010       if((*I).Pkg.end() == true)
1011          continue;
1012
1013       string const name = (*I).Pkg.FullName();
1014       PackageOpsDone[name] = 0;
1015       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1016       {
1017          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1018          PackagesTotal++;
1019       }
1020    }
1021 }
1022                                                                         /*}}}*/
1023 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR < 13)
1024 bool pkgDPkgPM::Go(int StatusFd)
1025 {
1026    APT::Progress::PackageManager *progress = NULL;
1027    if (StatusFd == -1)
1028       progress = APT::Progress::PackageManagerProgressFactory();
1029    else
1030       progress = new APT::Progress::PackageManagerProgressFd(StatusFd);
1031
1032    return GoNoABIBreak(progress);
1033 }
1034 #endif
1035
1036 void pkgDPkgPM::StartPtyMagic()
1037 {
1038    if (_config->FindB("Dpkg::Use-Pty", true) == false)
1039    {
1040       d->master = d->slave = -1;
1041       return;
1042    }
1043
1044    // setup the pty and stuff
1045    struct       winsize win;
1046
1047    // if tcgetattr does not return zero there was a error
1048    // and we do not do any pty magic
1049    _error->PushToStack();
1050    if (tcgetattr(STDOUT_FILENO, &d->tt) == 0)
1051    {
1052        if (ioctl(1, TIOCGWINSZ, (char *)&win) < 0)
1053        {
1054            _error->Errno("ioctl", _("ioctl(TIOCGWINSZ) failed"));
1055        } else if (openpty(&d->master, &d->slave, NULL, &d->tt, &win) < 0)
1056        {
1057            _error->Errno("openpty", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1058            d->master = d->slave = -1;
1059         } else {
1060             struct termios rtt;
1061             rtt = d->tt;
1062             cfmakeraw(&rtt);
1063             rtt.c_lflag &= ~ECHO;
1064             rtt.c_lflag |= ISIG;
1065             // block SIGTTOU during tcsetattr to prevent a hang if
1066             // the process is a member of the background process group
1067             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1068             sigemptyset(&d->sigmask);
1069             sigaddset(&d->sigmask, SIGTTOU);
1070             sigprocmask(SIG_BLOCK,&d->sigmask, &d->original_sigmask);
1071             tcsetattr(0, TCSAFLUSH, &rtt);
1072             sigprocmask(SIG_SETMASK, &d->original_sigmask, 0);
1073         }
1074       }
1075    // complain only if stdout is either a terminal (but still failed) or is an invalid
1076       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1077       else if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1078          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1079
1080       if (_error->PendingError() == true)
1081          _error->DumpErrors(std::cerr);
1082       _error->RevertToStack();
1083 }
1084
1085 void pkgDPkgPM::StopPtyMagic()
1086 {
1087    if(d->slave > 0)
1088       close(d->slave);
1089    if(d->master >= 0)
1090    {
1091       tcsetattr(0, TCSAFLUSH, &d->tt);
1092       close(d->master);
1093    }
1094 }
1095
1096 // DPkgPM::Go - Run the sequence                                        /*{{{*/
1097 // ---------------------------------------------------------------------
1098 /* This globs the operations and calls dpkg
1099  *
1100  * If it is called with a progress object apt will report the install
1101  * progress to this object. It maps the dpkg states a package goes
1102  * through to human readable (and i10n-able)
1103  * names and calculates a percentage for each step.
1104  */
1105 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
1106 bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
1107 #else
1108 bool pkgDPkgPM::GoNoABIBreak(APT::Progress::PackageManager *progress)
1109 #endif
1110 {
1111    pkgPackageManager::SigINTStop = false;
1112    d->progress = progress;
1113
1114    // Generate the base argument list for dpkg
1115    unsigned long StartSize = 0;
1116    std::vector<const char *> Args;
1117    std::string DpkgExecutable = getDpkgExecutable();
1118    Args.push_back(DpkgExecutable.c_str());
1119    StartSize += DpkgExecutable.length();
1120
1121    // Stick in any custom dpkg options
1122    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
1123    if (Opts != 0)
1124    {
1125       Opts = Opts->Child;
1126       for (; Opts != 0; Opts = Opts->Next)
1127       {
1128          if (Opts->Value.empty() == true)
1129             continue;
1130          Args.push_back(Opts->Value.c_str());
1131          StartSize += Opts->Value.length();
1132       }
1133    }
1134
1135    size_t const BaseArgs = Args.size();
1136    // we need to detect if we can qualify packages with the architecture or not
1137    Args.push_back("--assert-multi-arch");
1138    Args.push_back(NULL);
1139
1140    pid_t dpkgAssertMultiArch = ExecFork();
1141    if (dpkgAssertMultiArch == 0)
1142    {
1143       dpkgChrootDirectory();
1144       // redirect everything to the ultimate sink as we only need the exit-status
1145       int const nullfd = open("/dev/null", O_RDONLY);
1146       dup2(nullfd, STDIN_FILENO);
1147       dup2(nullfd, STDOUT_FILENO);
1148       dup2(nullfd, STDERR_FILENO);
1149       execvp(Args[0], (char**) &Args[0]);
1150       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
1151       _exit(2);
1152    }
1153
1154    fd_set rfds;
1155    struct timespec tv;
1156
1157    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
1158    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
1159    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
1160
1161    if (RunScripts("DPkg::Pre-Invoke") == false)
1162       return false;
1163
1164    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
1165       return false;
1166
1167    // support subpressing of triggers processing for special
1168    // cases like d-i that runs the triggers handling manually
1169    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
1170    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
1171    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
1172       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
1173
1174    // for the progress
1175    BuildPackagesProgressMap();
1176
1177    d->stdin_is_dev_null = false;
1178
1179    // create log
1180    OpenLog();
1181
1182    bool dpkgMultiArch = false;
1183    if (dpkgAssertMultiArch > 0)
1184    {
1185       int Status = 0;
1186       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1187       {
1188          if (errno == EINTR)
1189             continue;
1190          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1191          break;
1192       }
1193       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1194          dpkgMultiArch = true;
1195    }
1196
1197    // start pty magic before the loop
1198    StartPtyMagic();
1199
1200    // Tell the progress that its starting and fork dpkg
1201    d->progress->Start(d->master);
1202
1203    // this loop is runs once per dpkg operation
1204    vector<Item>::const_iterator I = List.begin();
1205    while (I != List.end())
1206    {
1207       // Do all actions with the same Op in one run
1208       vector<Item>::const_iterator J = I;
1209       if (TriggersPending == true)
1210          for (; J != List.end(); ++J)
1211          {
1212             if (J->Op == I->Op)
1213                continue;
1214             if (J->Op != Item::TriggersPending)
1215                break;
1216             vector<Item>::const_iterator T = J + 1;
1217             if (T != List.end() && T->Op == I->Op)
1218                continue;
1219             break;
1220          }
1221       else
1222          for (; J != List.end() && J->Op == I->Op; ++J)
1223             /* nothing */;
1224
1225       // keep track of allocated strings for multiarch package names
1226       std::vector<char *> Packages;
1227
1228       // start with the baseset of arguments
1229       unsigned long Size = StartSize;
1230       Args.erase(Args.begin() + BaseArgs, Args.end());
1231
1232       // Now check if we are within the MaxArgs limit
1233       //
1234       // this code below is problematic, because it may happen that
1235       // the argument list is split in a way that A depends on B
1236       // and they are in the same "--configure A B" run
1237       // - with the split they may now be configured in different
1238       //   runs, using Immediate-Configure-All can help prevent this.
1239       if (J - I > (signed)MaxArgs)
1240       {
1241          J = I + MaxArgs;
1242          unsigned long const size = MaxArgs + 10;
1243          Args.reserve(size);
1244          Packages.reserve(size);
1245       }
1246       else
1247       {
1248          unsigned long const size = (J - I) + 10;
1249          Args.reserve(size);
1250          Packages.reserve(size);
1251       }
1252
1253       int fd[2];
1254       if (pipe(fd) != 0)
1255          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1256
1257 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1258 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1259
1260       ADDARGC("--status-fd");
1261       char status_fd_buf[20];
1262       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1263       ADDARG(status_fd_buf);
1264       unsigned long const Op = I->Op;
1265
1266       switch (I->Op)
1267       {
1268          case Item::Remove:
1269          ADDARGC("--force-depends");
1270          ADDARGC("--force-remove-essential");
1271          ADDARGC("--remove");
1272          break;
1273
1274          case Item::Purge:
1275          ADDARGC("--force-depends");
1276          ADDARGC("--force-remove-essential");
1277          ADDARGC("--purge");
1278          break;
1279
1280          case Item::Configure:
1281          ADDARGC("--configure");
1282          break;
1283
1284          case Item::ConfigurePending:
1285          ADDARGC("--configure");
1286          ADDARGC("--pending");
1287          break;
1288
1289          case Item::TriggersPending:
1290          ADDARGC("--triggers-only");
1291          ADDARGC("--pending");
1292          break;
1293
1294          case Item::Install:
1295          ADDARGC("--unpack");
1296          ADDARGC("--auto-deconfigure");
1297          break;
1298       }
1299
1300       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1301           I->Op != Item::ConfigurePending)
1302       {
1303          ADDARGC("--no-triggers");
1304       }
1305 #undef ADDARGC
1306
1307       // Write in the file or package names
1308       if (I->Op == Item::Install)
1309       {
1310          for (;I != J && Size < MaxArgBytes; ++I)
1311          {
1312             if (I->File[0] != '/')
1313                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1314             Args.push_back(I->File.c_str());
1315             Size += I->File.length();
1316          }
1317       }
1318       else
1319       {
1320          string const nativeArch = _config->Find("APT::Architecture");
1321          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1322          for (;I != J && Size < MaxArgBytes; ++I)
1323          {
1324             if((*I).Pkg.end() == true)
1325                continue;
1326             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.FullName(true)) != disappearedPkgs.end())
1327                continue;
1328             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1329             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1330                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1331                                            strcmp(I->Pkg.Arch(), "none") == 0))
1332             {
1333                char const * const name = I->Pkg.Name();
1334                ADDARG(name);
1335             }
1336             else
1337             {
1338                pkgCache::VerIterator PkgVer;
1339                std::string name = I->Pkg.Name();
1340                if (Op == Item::Remove || Op == Item::Purge)
1341                {
1342                   PkgVer = I->Pkg.CurrentVer();
1343                   if(PkgVer.end() == true)
1344                      PkgVer = FindNowVersion(I->Pkg);
1345                }
1346                else
1347                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1348                if (strcmp(I->Pkg.Arch(), "none") == 0)
1349                   ; // never arch-qualify a package without an arch
1350                else if (PkgVer.end() == false)
1351                   name.append(":").append(PkgVer.Arch());
1352                else
1353                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1354                char * const fullname = strdup(name.c_str());
1355                Packages.push_back(fullname);
1356                ADDARG(fullname);
1357             }
1358          }
1359          // skip configure action if all sheduled packages disappeared
1360          if (oldSize == Size)
1361             continue;
1362       }
1363 #undef ADDARG
1364
1365       J = I;
1366
1367       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1368       {
1369          for (std::vector<const char *>::const_iterator a = Args.begin();
1370               a != Args.end(); ++a)
1371             clog << *a << ' ';
1372          clog << endl;
1373          continue;
1374       }
1375       Args.push_back(NULL);
1376
1377       cout << flush;
1378       clog << flush;
1379       cerr << flush;
1380
1381       /* Mask off sig int/quit. We do this because dpkg also does when
1382          it forks scripts. What happens is that when you hit ctrl-c it sends
1383          it to all processes in the group. Since dpkg ignores the signal
1384          it doesn't die but we do! So we must also ignore it */
1385       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1386       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1387
1388       // Check here for any SIGINT
1389       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1390          break;
1391
1392
1393       // ignore SIGHUP as well (debian #463030)
1394       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1395
1396       // now run dpkg
1397       d->progress->StartDpkg();
1398       std::set<int> KeepFDs;
1399       KeepFDs.insert(fd[1]);
1400       MergeKeepFdsFromConfiguration(KeepFDs);
1401       pid_t Child = ExecFork(KeepFDs);
1402       if (Child == 0)
1403       {
1404          // This is the child
1405          if(d->slave >= 0 && d->master >= 0)
1406          {
1407             setsid();
1408             int res = ioctl(d->slave, TIOCSCTTY, 0);
1409             if (res < 0) {
1410                std::cerr << "ioctl(TIOCSCTTY) failed for fd: "
1411                          << d->slave << std::endl;
1412             } else {
1413                close(d->master);
1414                dup2(d->slave, 0);
1415                dup2(d->slave, 1);
1416                dup2(d->slave, 2);
1417                close(d->slave);
1418             }
1419          }
1420          close(fd[0]); // close the read end of the pipe
1421
1422          dpkgChrootDirectory();
1423
1424          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1425             _exit(100);
1426
1427          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1428          {
1429             int Flags,dummy;
1430             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1431                _exit(100);
1432
1433             // Discard everything in stdin before forking dpkg
1434             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1435                _exit(100);
1436
1437             while (read(STDIN_FILENO,&dummy,1) == 1);
1438
1439             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1440                _exit(100);
1441          }
1442
1443          /* No Job Control Stop Env is a magic dpkg var that prevents it
1444             from using sigstop */
1445          putenv((char *)"DPKG_NO_TSTP=yes");
1446          execvp(Args[0], (char**) &Args[0]);
1447          cerr << "Could not exec dpkg!" << endl;
1448          _exit(100);
1449       }
1450
1451       // apply ionice
1452       if (_config->FindB("DPkg::UseIoNice", false) == true)
1453          ionice(Child);
1454
1455       // Wait for dpkg
1456       int Status = 0;
1457
1458       // we read from dpkg here
1459       int const _dpkgin = fd[0];
1460       close(fd[1]);                        // close the write end of the pipe
1461
1462       // setups fds
1463       sigemptyset(&d->sigmask);
1464       sigprocmask(SIG_BLOCK,&d->sigmask,&d->original_sigmask);
1465
1466       /* free vectors (and therefore memory) as we don't need the included data anymore */
1467       for (std::vector<char *>::const_iterator p = Packages.begin();
1468            p != Packages.end(); ++p)
1469          free(*p);
1470       Packages.clear();
1471
1472       // the result of the waitpid call
1473       int res;
1474       int select_ret;
1475       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1476          if(res < 0) {
1477             // FIXME: move this to a function or something, looks ugly here
1478             // error handling, waitpid returned -1
1479             if (errno == EINTR)
1480                continue;
1481             RunScripts("DPkg::Post-Invoke");
1482
1483             // Restore sig int/quit
1484             signal(SIGQUIT,old_SIGQUIT);
1485             signal(SIGINT,old_SIGINT);
1486
1487             signal(SIGHUP,old_SIGHUP);
1488             return _error->Errno("waitpid","Couldn't wait for subprocess");
1489          }
1490
1491          // wait for input or output here
1492          FD_ZERO(&rfds);
1493          if (d->master >= 0 && !d->stdin_is_dev_null)
1494             FD_SET(0, &rfds);
1495          FD_SET(_dpkgin, &rfds);
1496          if(d->master >= 0)
1497             FD_SET(d->master, &rfds);
1498          tv.tv_sec = 0;
1499          tv.tv_nsec = d->progress->GetPulseInterval();
1500          select_ret = pselect(max(d->master, _dpkgin)+1, &rfds, NULL, NULL,
1501                               &tv, &d->original_sigmask);
1502          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1503             select_ret = racy_pselect(max(d->master, _dpkgin)+1, &rfds, NULL,
1504                                       NULL, &tv, &d->original_sigmask);
1505          d->progress->Pulse();
1506          if (select_ret == 0)
1507             continue;
1508          else if (select_ret < 0 && errno == EINTR)
1509             continue;
1510          else if (select_ret < 0)
1511          {
1512             perror("select() returned error");
1513             continue;
1514          }
1515
1516          if(d->master >= 0 && FD_ISSET(d->master, &rfds))
1517             DoTerminalPty(d->master);
1518          if(d->master >= 0 && FD_ISSET(0, &rfds))
1519             DoStdin(d->master);
1520          if(FD_ISSET(_dpkgin, &rfds))
1521             DoDpkgStatusFd(_dpkgin);
1522       }
1523       close(_dpkgin);
1524
1525       // Restore sig int/quit
1526       signal(SIGQUIT,old_SIGQUIT);
1527       signal(SIGINT,old_SIGINT);
1528
1529       signal(SIGHUP,old_SIGHUP);
1530       // Check for an error code.
1531       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1532       {
1533          // if it was set to "keep-dpkg-runing" then we won't return
1534          // here but keep the loop going and just report it as a error
1535          // for later
1536          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1537
1538          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1539             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1540          else if (WIFEXITED(Status) != 0)
1541             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1542          else
1543             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1544          _error->Error("%s", d->dpkg_error.c_str());
1545
1546          if(stopOnError)
1547             break;
1548       }
1549    }
1550    // dpkg is done at this point
1551    d->progress->Stop();
1552    StopPtyMagic();
1553    CloseLog();
1554
1555    if (pkgPackageManager::SigINTStop)
1556        _error->Warning(_("Operation was interrupted before it could finish"));
1557
1558    if (RunScripts("DPkg::Post-Invoke") == false)
1559       return false;
1560
1561    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1562    {
1563       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1564       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1565           unlink(oldpkgcache.c_str()) == 0)
1566       {
1567          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1568          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1569          {
1570             _error->PushToStack();
1571             pkgCacheFile CacheFile;
1572             CacheFile.BuildCaches(NULL, true);
1573             _error->RevertToStack();
1574          }
1575       }
1576    }
1577
1578    Cache.writeStateFile(NULL);
1579    return d->dpkg_error.empty();
1580 }
1581
1582 void SigINT(int /*sig*/) {
1583    pkgPackageManager::SigINTStop = true;
1584 }
1585                                                                         /*}}}*/
1586 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1587 // ---------------------------------------------------------------------
1588 /* */
1589 void pkgDPkgPM::Reset()
1590 {
1591    List.erase(List.begin(),List.end());
1592 }
1593                                                                         /*}}}*/
1594 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1595 // ---------------------------------------------------------------------
1596 /* */
1597 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1598 {
1599    // If apport doesn't exist or isn't installed do nothing
1600    // This e.g. prevents messages in 'universes' without apport
1601    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1602    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1603       return;
1604
1605    string pkgname, reportfile, srcpkgname, pkgver, arch;
1606    string::size_type pos;
1607    FILE *report;
1608
1609    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1610    {
1611       std::clog << "configured to not write apport reports" << std::endl;
1612       return;
1613    }
1614
1615    // only report the first errors
1616    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1617    {
1618       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1619       return;
1620    }
1621
1622    // check if its not a follow up error
1623    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1624    if(strstr(errormsg, needle) != NULL) {
1625       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1626       return;
1627    }
1628
1629    // do not report disk-full failures
1630    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1631       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1632       return;
1633    }
1634
1635    // do not report out-of-memory failures
1636    if(strstr(errormsg, strerror(ENOMEM)) != NULL ||
1637       strstr(errormsg, "failed to allocate memory") != NULL) {
1638       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1639       return;
1640    }
1641
1642    // do not report bugs regarding inaccessible local files
1643    if(strstr(errormsg, strerror(ENOENT)) != NULL ||
1644       strstr(errormsg, "cannot access archive") != NULL) {
1645       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1646       return;
1647    }
1648
1649    // do not report errors encountered when decompressing packages
1650    if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) {
1651       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1652       return;
1653    }
1654
1655    // do not report dpkg I/O errors, this is a format string, so we compare
1656    // the prefix and the suffix of the error with the dpkg error message
1657    vector<string> io_errors;
1658    io_errors.push_back(string("failed to read on buffer copy for %s"));
1659    io_errors.push_back(string("failed in write on buffer copy for %s"));
1660    io_errors.push_back(string("short read on buffer copy for %s"));
1661
1662    for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); ++I)
1663    {
1664       vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%');
1665       if (list.size() > 1) {
1666          // we need to split %s, VectorizeString only allows char so we need
1667          // to kill the "s" manually
1668          if (list[1].size() > 1) {
1669             list[1].erase(0, 1);
1670             if(strstr(errormsg, list[0].c_str()) &&
1671                strstr(errormsg, list[1].c_str())) {
1672                std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1673                return;
1674             }
1675          }
1676       }
1677    }
1678
1679    // get the pkgname and reportfile
1680    pkgname = flNotDir(pkgpath);
1681    pos = pkgname.find('_');
1682    if(pos != string::npos)
1683       pkgname = pkgname.substr(0, pos);
1684
1685    // find the package versin and source package name
1686    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1687    if (Pkg.end() == true)
1688       return;
1689    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1690    if (Ver.end() == true)
1691       return;
1692    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1693    pkgRecords Recs(Cache);
1694    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1695    srcpkgname = Parse.SourcePkg();
1696    if(srcpkgname.empty())
1697       srcpkgname = pkgname;
1698
1699    // if the file exists already, we check:
1700    // - if it was reported already (touched by apport).
1701    //   If not, we do nothing, otherwise
1702    //    we overwrite it. This is the same behaviour as apport
1703    // - if we have a report with the same pkgversion already
1704    //   then we skip it
1705    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1706    if(FileExists(reportfile))
1707    {
1708       struct stat buf;
1709       char strbuf[255];
1710
1711       // check atime/mtime
1712       stat(reportfile.c_str(), &buf);
1713       if(buf.st_mtime > buf.st_atime)
1714          return;
1715
1716       // check if the existing report is the same version
1717       report = fopen(reportfile.c_str(),"r");
1718       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1719       {
1720          if(strstr(strbuf,"Package:") == strbuf)
1721          {
1722             char pkgname[255], version[255];
1723             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1724                if(strcmp(pkgver.c_str(), version) == 0)
1725                {
1726                   fclose(report);
1727                   return;
1728                }
1729          }
1730       }
1731       fclose(report);
1732    }
1733
1734    // now write the report
1735    arch = _config->Find("APT::Architecture");
1736    report = fopen(reportfile.c_str(),"w");
1737    if(report == NULL)
1738       return;
1739    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1740       chmod(reportfile.c_str(), 0);
1741    else
1742       chmod(reportfile.c_str(), 0600);
1743    fprintf(report, "ProblemType: Package\n");
1744    fprintf(report, "Architecture: %s\n", arch.c_str());
1745    time_t now = time(NULL);
1746    fprintf(report, "Date: %s" , ctime(&now));
1747    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1748    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1749    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1750
1751    // ensure that the log is flushed
1752    if(d->term_out)
1753       fflush(d->term_out);
1754
1755    // attach terminal log it if we have it
1756    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1757    if (!logfile_name.empty())
1758    {
1759       FILE *log = NULL;
1760
1761       fprintf(report, "DpkgTerminalLog:\n");
1762       log = fopen(logfile_name.c_str(),"r");
1763       if(log != NULL)
1764       {
1765          char buf[1024];
1766          while( fgets(buf, sizeof(buf), log) != NULL)
1767             fprintf(report, " %s", buf);
1768          fprintf(report, " \n");
1769          fclose(log);
1770       }
1771    }
1772
1773    // attach history log it if we have it
1774    string histfile_name = _config->FindFile("Dir::Log::History");
1775    if (!histfile_name.empty())
1776    {
1777       fprintf(report, "DpkgHistoryLog:\n");
1778       FILE* log = fopen(histfile_name.c_str(),"r");
1779       if(log != NULL)
1780       {
1781          char buf[1024];
1782          while( fgets(buf, sizeof(buf), log) != NULL)
1783             fprintf(report, " %s", buf);
1784          fclose(log);
1785       }
1786    }
1787
1788    // log the ordering
1789    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1790    fprintf(report, "AptOrdering:\n");
1791    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1792       if ((*I).Pkg != NULL)
1793          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1794       else
1795          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1796
1797    // attach dmesg log (to learn about segfaults)
1798    if (FileExists("/bin/dmesg"))
1799    {
1800       fprintf(report, "Dmesg:\n");
1801       FILE *log = popen("/bin/dmesg","r");
1802       if(log != NULL)
1803       {
1804          char buf[1024];
1805          while( fgets(buf, sizeof(buf), log) != NULL)
1806             fprintf(report, " %s", buf);
1807          pclose(log);
1808       }
1809    }
1810
1811    // attach df -l log (to learn about filesystem status)
1812    if (FileExists("/bin/df"))
1813    {
1814
1815       fprintf(report, "Df:\n");
1816       FILE *log = popen("/bin/df -l","r");
1817       if(log != NULL)
1818       {
1819          char buf[1024];
1820          while( fgets(buf, sizeof(buf), log) != NULL)
1821             fprintf(report, " %s", buf);
1822          pclose(log);
1823       }
1824    }
1825
1826    fclose(report);
1827
1828 }
1829                                                                         /*}}}*/