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