apt-pkg/deb/dpkgpm.cc

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