apt-pkg/deb/dpkgpm.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
   4 /* ######################################################################
   5
   6    DPKG Package Manager - Provide an interface to dpkg
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include <config.h>
  12
  13 #include <apt-pkg/dpkgpm.h>
  14 #include <apt-pkg/error.h>
  15 #include <apt-pkg/configuration.h>
  16 #include <apt-pkg/depcache.h>
  17 #include <apt-pkg/pkgrecords.h>
  18 #include <apt-pkg/strutl.h>
  19 #include <apt-pkg/fileutl.h>
  20 #include <apt-pkg/cachefile.h>
  21 #include <apt-pkg/packagemanager.h>
  22 #include <apt-pkg/install-progress.h>
  23
  24 #include <unistd.h>
  25 #include <stdlib.h>
  26 #include <fcntl.h>
  27 #include <sys/select.h>
  28 #include <sys/stat.h>
  29 #include <sys/types.h>
  30 #include <sys/wait.h>
  31 #include <signal.h>
  32 #include <errno.h>
  33 #include <string.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <algorithm>
  37 #include <sstream>
  38 #include <map>
  39 #include <pwd.h>
  40 #include <grp.h>
  41 #include <iomanip>
  42
  43 #include <termios.h>
  44 #include <unistd.h>
  45 #include <sys/ioctl.h>
  46 #include <pty.h>
  47
  48 #include <apti18n.h>
  49                                                                         /*}}}*/
  50
  51 using namespace std;
  52
  53 class pkgDPkgPMPrivate
  54 {
  55 public:
  56    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  57                         term_out(NULL), history_out(NULL),
  58                         progress(NULL)
  59    {
  60       dpkgbuf[0] = '\0';
  61    }
  62    ~pkgDPkgPMPrivate()
  63    {
  64    }
  65    bool stdin_is_dev_null;
  66    // the buffer we use for the dpkg status-fd reading
  67    char dpkgbuf[1024];
  68    int dpkgbuf_pos;
  69    FILE *term_out;
  70    FILE *history_out;
  71    string dpkg_error;
  72    APT::Progress::PackageManager *progress;
  73 };
  74
  75 namespace
  76 {
  77   // Maps the dpkg "processing" info to human readable names.  Entry 0
  78   // of each array is the key, entry 1 is the value.
  79   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  80     std::make_pair("install",   N_("Installing %s")),
  81     std::make_pair("configure", N_("Configuring %s")),
  82     std::make_pair("remove",    N_("Removing %s")),
  83     std::make_pair("purge",    N_("Completely removing %s")),
  84     std::make_pair("disappear", N_("Noting disappearance of %s")),
  85     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  86   };
  87
  88   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  89   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  90
  91   // Predicate to test whether an entry in the PackageProcessingOps
  92   // array matches a string.
  93   class MatchProcessingOp
  94   {
  95     const char *target;
  96
  97   public:
  98     MatchProcessingOp(const char *the_target)
  99       : target(the_target)
 100     {
 101     }
 102
 103     bool operator()(const std::pair<const char *, const char *> &pair) const
 104     {
 105       return strcmp(pair.first, target) == 0;
 106     }
 107   };
 108 }
 109
 110 /* helper function to ionice the given PID
 111
 112  there is no C header for ionice yet - just the syscall interface
 113  so we use the binary from util-linux
 114 */
 115 static bool
 116 ionice(int PID)
 117 {
 118    if (!FileExists("/usr/bin/ionice"))
 119       return false;
 120    pid_t Process = ExecFork();
 121    if (Process == 0)
 122    {
 123       char buf[32];
 124       snprintf(buf, sizeof(buf), "-p%d", PID);
 125       const char *Args[4];
 126       Args[0] = "/usr/bin/ionice";
 127       Args[1] = "-c3";
 128       Args[2] = buf;
 129       Args[3] = 0;
 130       execv(Args[0], (char **)Args);
 131    }
 132    return ExecWait(Process, "ionice");
 133 }
 134
 135 static std::string getDpkgExecutable()
 136 {
 137    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 138    string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 139    size_t dpkgChrootLen = dpkgChrootDir.length();
 140    if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 141    {
 142       if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 143          --dpkgChrootLen;
 144       Tmp = Tmp.substr(dpkgChrootLen);
 145    }
 146    return Tmp;
 147 }
 148
 149 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 150 static void dpkgChrootDirectory()
 151 {
 152    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 153    if (chrootDir == "/")
 154       return;
 155    std::cerr << "Chrooting into " << chrootDir << std::endl;
 156    if (chroot(chrootDir.c_str()) != 0)
 157       _exit(100);
 158    if (chdir("/") != 0)
 159       _exit(100);
 160 }
 161                                                                         /*}}}*/
 162
 163
 164 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 165 // ---------------------------------------------------------------------
 166 /* This is helpful when a package is no longer installed but has residual
 167  * config files
 168  */
 169 static
 170 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 171 {
 172    pkgCache::VerIterator Ver;
 173    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 174    {
 175       pkgCache::VerFileIterator Vf = Ver.FileList();
 176       pkgCache::PkgFileIterator F = Vf.File();
 177       for (F = Vf.File(); F.end() == false; ++F)
 178       {
 179          if (F && F.Archive())
 180          {
 181             if (strcmp(F.Archive(), "now"))
 182                return Ver;
 183          }
 184       }
 185    }
 186    return Ver;
 187 }
 188                                                                         /*}}}*/
 189
 190 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 191 // ---------------------------------------------------------------------
 192 /* */
 193 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 194    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 195 {
 196    d = new pkgDPkgPMPrivate();
 197 }
 198                                                                         /*}}}*/
 199 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 200 // ---------------------------------------------------------------------
 201 /* */
 202 pkgDPkgPM::~pkgDPkgPM()
 203 {
 204    delete d;
 205 }
 206                                                                         /*}}}*/
 207 // DPkgPM::Install - Install a package                                  /*{{{*/
 208 // ---------------------------------------------------------------------
 209 /* Add an install operation to the sequence list */
 210 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 211 {
 212    if (File.empty() == true || Pkg.end() == true)
 213       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 214
 215    // If the filename string begins with DPkg::Chroot-Directory, return the
 216    // substr that is within the chroot so dpkg can access it.
 217    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 218    if (chrootdir != "/" && File.find(chrootdir) == 0)
 219    {
 220       size_t len = chrootdir.length();
 221       if (chrootdir.at(len - 1) == '/')
 222         len--;
 223       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 224    }
 225    else
 226       List.push_back(Item(Item::Install,Pkg,File));
 227
 228    return true;
 229 }
 230                                                                         /*}}}*/
 231 // DPkgPM::Configure - Configure a package                              /*{{{*/
 232 // ---------------------------------------------------------------------
 233 /* Add a configure operation to the sequence list */
 234 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 235 {
 236    if (Pkg.end() == true)
 237       return false;
 238
 239    List.push_back(Item(Item::Configure, Pkg));
 240
 241    // Use triggers for config calls if we configure "smart"
 242    // as otherwise Pre-Depends will not be satisfied, see #526774
 243    if (_config->FindB("DPkg::TriggersPending", false) == true)
 244       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 245
 246    return true;
 247 }
 248                                                                         /*}}}*/
 249 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 250 // ---------------------------------------------------------------------
 251 /* Add a remove operation to the sequence list */
 252 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 253 {
 254    if (Pkg.end() == true)
 255       return false;
 256
 257    if (Purge == true)
 258       List.push_back(Item(Item::Purge,Pkg));
 259    else
 260       List.push_back(Item(Item::Remove,Pkg));
 261    return true;
 262 }
 263                                                                         /*}}}*/
 264 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 265 // ---------------------------------------------------------------------
 266 /* This is part of the helper script communication interface, it sends
 267    very complete information down to the other end of the pipe.*/
 268 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 269 {
 270    return SendPkgsInfo(F, 2);
 271 }
 272 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 273 {
 274    // This version of APT supports only v3, so don't sent higher versions
 275    if (Version <= 3)
 276       fprintf(F,"VERSION %u\n", Version);
 277    else
 278       fprintf(F,"VERSION 3\n");
 279
 280    /* Write out all of the configuration directives by walking the
 281       configuration tree */
 282    const Configuration::Item *Top = _config->Tree(0);
 283    for (; Top != 0;)
 284    {
 285       if (Top->Value.empty() == false)
 286       {
 287          fprintf(F,"%s=%s\n",
 288                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 289                  QuoteString(Top->Value,"\n").c_str());
 290       }
 291
 292       if (Top->Child != 0)
 293       {
 294          Top = Top->Child;
 295          continue;
 296       }
 297
 298       while (Top != 0 && Top->Next == 0)
 299          Top = Top->Parent;
 300       if (Top != 0)
 301          Top = Top->Next;
 302    }
 303    fprintf(F,"\n");
 304
 305    // Write out the package actions in order.
 306    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 307    {
 308       if(I->Pkg.end() == true)
 309          continue;
 310
 311       pkgDepCache::StateCache &S = Cache[I->Pkg];
 312
 313       fprintf(F,"%s ",I->Pkg.Name());
 314
 315       // Current version which we are going to replace
 316       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 317       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 318          CurVer = FindNowVersion(I->Pkg);
 319
 320       if (CurVer.end() == true)
 321       {
 322          if (Version <= 2)
 323             fprintf(F, "- ");
 324          else
 325             fprintf(F, "- - none ");
 326       }
 327       else
 328       {
 329          fprintf(F, "%s ", CurVer.VerStr());
 330          if (Version >= 3)
 331             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 332       }
 333
 334       // Show the compare operator between current and install version
 335       if (S.InstallVer != 0)
 336       {
 337          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 338          int Comp = 2;
 339          if (CurVer.end() == false)
 340             Comp = InstVer.CompareVer(CurVer);
 341          if (Comp < 0)
 342             fprintf(F,"> ");
 343          else if (Comp == 0)
 344             fprintf(F,"= ");
 345          else if (Comp > 0)
 346             fprintf(F,"< ");
 347          fprintf(F, "%s ", InstVer.VerStr());
 348          if (Version >= 3)
 349             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 350       }
 351       else
 352       {
 353          if (Version <= 2)
 354             fprintf(F, "> - ");
 355          else
 356             fprintf(F, "> - - none ");
 357       }
 358
 359       // Show the filename/operation
 360       if (I->Op == Item::Install)
 361       {
 362          // No errors here..
 363          if (I->File[0] != '/')
 364             fprintf(F,"**ERROR**\n");
 365          else
 366             fprintf(F,"%s\n",I->File.c_str());
 367       }
 368       else if (I->Op == Item::Configure)
 369          fprintf(F,"**CONFIGURE**\n");
 370       else if (I->Op == Item::Remove ||
 371           I->Op == Item::Purge)
 372          fprintf(F,"**REMOVE**\n");
 373
 374       if (ferror(F) != 0)
 375          return false;
 376    }
 377    return true;
 378 }
 379                                                                         /*}}}*/
 380 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 381 // ---------------------------------------------------------------------
 382 /* This looks for a list of scripts to run from the configuration file
 383    each one is run and is fed on standard input a list of all .deb files
 384    that are due to be installed. */
 385 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 386 {
 387    Configuration::Item const *Opts = _config->Tree(Cnf);
 388    if (Opts == 0 || Opts->Child == 0)
 389       return true;
 390    Opts = Opts->Child;
 391
 392    unsigned int Count = 1;
 393    for (; Opts != 0; Opts = Opts->Next, Count++)
 394    {
 395       if (Opts->Value.empty() == true)
 396          continue;
 397
 398       // Determine the protocol version
 399       string OptSec = Opts->Value;
 400       string::size_type Pos;
 401       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 402          Pos = OptSec.length();
 403       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 404
 405       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 406       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 407
 408       // Create the pipes
 409       int Pipes[2];
 410       if (pipe(Pipes) != 0)
 411          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 412       if (InfoFD != (unsigned)Pipes[0])
 413          SetCloseExec(Pipes[0],true);
 414       else
 415          _config->Set("APT::Keep-Fds::", Pipes[0]);
 416       SetCloseExec(Pipes[1],true);
 417
 418       // Purified Fork for running the script
 419       pid_t Process = ExecFork();
 420       if (Process == 0)
 421       {
 422          // Setup the FDs
 423          dup2(Pipes[0], InfoFD);
 424          SetCloseExec(STDOUT_FILENO,false);
 425          SetCloseExec(STDIN_FILENO,false);
 426          SetCloseExec(STDERR_FILENO,false);
 427
 428          string hookfd;
 429          strprintf(hookfd, "%d", InfoFD);
 430          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 431
 432          dpkgChrootDirectory();
 433          const char *Args[4];
 434          Args[0] = "/bin/sh";
 435          Args[1] = "-c";
 436          Args[2] = Opts->Value.c_str();
 437          Args[3] = 0;
 438          execv(Args[0],(char **)Args);
 439          _exit(100);
 440       }
 441       if (InfoFD == (unsigned)Pipes[0])
 442          _config->Clear("APT::Keep-Fds", Pipes[0]);
 443       close(Pipes[0]);
 444       FILE *F = fdopen(Pipes[1],"w");
 445       if (F == 0)
 446          return _error->Errno("fdopen","Faild to open new FD");
 447
 448       // Feed it the filenames.
 449       if (Version <= 1)
 450       {
 451          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 452          {
 453             // Only deal with packages to be installed from .deb
 454             if (I->Op != Item::Install)
 455                continue;
 456
 457             // No errors here..
 458             if (I->File[0] != '/')
 459                continue;
 460
 461             /* Feed the filename of each package that is pending install
 462                into the pipe. */
 463             fprintf(F,"%s\n",I->File.c_str());
 464             if (ferror(F) != 0)
 465                break;
 466          }
 467       }
 468       else
 469          SendPkgsInfo(F, Version);
 470
 471       fclose(F);
 472
 473       // Clean up the sub process
 474       if (ExecWait(Process,Opts->Value.c_str()) == false)
 475          return _error->Error("Failure running script %s",Opts->Value.c_str());
 476    }
 477
 478    return true;
 479 }
 480                                                                         /*}}}*/
 481 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 482 // ---------------------------------------------------------------------
 483 /*
 484 */
 485 void pkgDPkgPM::DoStdin(int master)
 486 {
 487    unsigned char input_buf[256] = {0,};
 488    ssize_t len = read(0, input_buf, sizeof(input_buf));
 489    if (len)
 490       FileFd::Write(master, input_buf, len);
 491    else
 492       d->stdin_is_dev_null = true;
 493 }
 494                                                                         /*}}}*/
 495 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 496 // ---------------------------------------------------------------------
 497 /*
 498  * read the terminal pty and write log
 499  */
 500 void pkgDPkgPM::DoTerminalPty(int master)
 501 {
 502    unsigned char term_buf[1024] = {0,0, };
 503
 504    ssize_t len=read(master, term_buf, sizeof(term_buf));
 505    if(len == -1 && errno == EIO)
 506    {
 507       // this happens when the child is about to exit, we
 508       // give it time to actually exit, otherwise we run
 509       // into a race so we sleep for half a second.
 510       struct timespec sleepfor = { 0, 500000000 };
 511       nanosleep(&sleepfor, NULL);
 512       return;
 513    }
 514    if(len <= 0)
 515       return;
 516    FileFd::Write(1, term_buf, len);
 517    if(d->term_out)
 518       fwrite(term_buf, len, sizeof(char), d->term_out);
 519 }
 520                                                                         /*}}}*/
 521 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 522 // ---------------------------------------------------------------------
 523 /*
 524  */
 525 void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
 526 {
 527    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 528    if (Debug == true)
 529       std::clog << "got from dpkg '" << line << "'" << std::endl;
 530
 531    /* dpkg sends strings like this:
 532       'status:   <pkg>: <pkg  qstate>'
 533       'status:   <pkg>:<arch>: <pkg  qstate>'
 534
 535       'processing: {install,configure,remove,purge,disappear,trigproc}: pkg'
 536       'processing: {install,configure,remove,purge,disappear,trigproc}: trigger'
 537    */
 538
 539    // we need to split on ": " (note the appended space) as the ':' is
 540    // part of the pkgname:arch information that dpkg sends
 541    //
 542    // A dpkg error message may contain additional ":" (like
 543    //  "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 544    // so we need to ensure to not split too much
 545    std::vector<std::string> list = StringSplit(line, ": ", 4);
 546    if(list.size() < 3)
 547    {
 548       if (Debug == true)
 549          std::clog << "ignoring line: not enough ':'" << std::endl;
 550       return;
 551    }
 552
 553    // build the (prefix, pkgname, action) tuple, position of this
 554    // is different for "processing" or "status" messages
 555    std::string prefix = APT::String::Strip(list[0]);
 556    std::string pkgname;
 557    std::string action;
 558    ostringstream status;
 559
 560    // "processing" has the form "processing: action: pkg or trigger"
 561    // with action = ["install", "configure", "remove", "purge", "disappear",
 562    //                "trigproc"]
 563    if (prefix == "processing")
 564    {
 565       pkgname = APT::String::Strip(list[2]);
 566       action = APT::String::Strip(list[1]);
 567    }
 568    // "status" has the form: "status: pkg: state"
 569    // with state in ["half-installed", "unpacked", "half-configured",
 570    //                "installed", "config-files", "not-installed"]
 571    else if (prefix == "status")
 572    {
 573       pkgname = APT::String::Strip(list[1]);
 574       action = APT::String::Strip(list[2]);
 575    } else {
 576       if (Debug == true)
 577          std::clog << "unknown prefix '" << prefix << "'" << std::endl;
 578       return;
 579    }
 580
 581
 582    /* handle the special cases first:
 583
 584       errors look like this:
 585       '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
 586       and conffile-prompt like this
 587       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 588    */
 589    if (prefix == "status")
 590    {
 591       if(action == "error")
 592       {
 593          d->progress->Error(list[1], PackagesDone, PackagesTotal,
 594                             list[3]);
 595          pkgFailures++;
 596          WriteApportReport(list[1].c_str(), list[3].c_str());
 597          return;
 598       }
 599       else if(action == "conffile")
 600       {
 601          d->progress->ConffilePrompt(list[1], PackagesDone, PackagesTotal,
 602                                      list[3]);
 603          return;
 604       }
 605    }
 606
 607    // at this point we know that we should have a valid pkgname, so build all
 608    // the info from it
 609
 610    // dpkg does not send always send "pkgname:arch" so we add it here
 611    // if needed
 612    if (pkgname.find(":") == std::string::npos)
 613    {
 614       // find the package in the group that is in a touched by dpkg
 615       // if there are multiple dpkg will send us a full pkgname:arch
 616       pkgCache::GrpIterator Grp = Cache.FindGrp(pkgname);
 617       if (Grp.end() == false)
 618       {
 619           pkgCache::PkgIterator P = Grp.PackageList();
 620           for (; P.end() != true; P = Grp.NextPkg(P))
 621           {
 622               if(Cache[P].Mode != pkgDepCache::ModeKeep)
 623               {
 624                   pkgname = P.FullName();
 625                   break;
 626               }
 627           }
 628       }
 629    }
 630
 631    const char* const pkg = pkgname.c_str();
 632    std::string short_pkgname = StringSplit(pkgname, ":")[0];
 633    std::string arch = "";
 634    if (pkgname.find(":") != string::npos)
 635       arch = StringSplit(pkgname, ":")[1];
 636    std::string i18n_pkgname = pkgname;
 637    if (arch.size() != 0)
 638       strprintf(i18n_pkgname, "%s (%s)", short_pkgname.c_str(), arch.c_str());
 639
 640    // 'processing' from dpkg looks like
 641    // 'processing: action: pkg'
 642    if(prefix == "processing")
 643    {
 644       const std::pair<const char *, const char *> * const iter =
 645         std::find_if(PackageProcessingOpsBegin,
 646                      PackageProcessingOpsEnd,
 647                      MatchProcessingOp(action.c_str()));
 648       if(iter == PackageProcessingOpsEnd)
 649       {
 650          if (Debug == true)
 651             std::clog << "ignoring unknown action: " << action << std::endl;
 652          return;
 653       }
 654       std::string msg;
 655       strprintf(msg, _(iter->second), i18n_pkgname.c_str());
 656       d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 657
 658       // FIXME: this needs a muliarch testcase
 659       // FIXME2: is "pkgname" here reliable with dpkg only sending us
 660       //         short pkgnames?
 661       if (action == "disappear")
 662          handleDisappearAction(pkgname);
 663       return;
 664    }
 665
 666    if (prefix == "status")
 667    {
 668       vector<struct DpkgState> const &states = PackageOps[pkg];
 669       const char *next_action = NULL;
 670       if(PackageOpsDone[pkg] < states.size())
 671          next_action = states[PackageOpsDone[pkg]].state;
 672       // check if the package moved to the next dpkg state
 673       if(next_action && (action == next_action))
 674       {
 675          // only read the translation if there is actually a next
 676          // action
 677          const char *translation = _(states[PackageOpsDone[pkg]].str);
 678          std::string msg;
 679
 680          // we moved from one dpkg state to a new one, report that
 681          PackageOpsDone[pkg]++;
 682          PackagesDone++;
 683
 684          strprintf(msg, translation, i18n_pkgname.c_str());
 685          d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 686
 687       }
 688       if (Debug == true)
 689          std::clog << "(parsed from dpkg) pkg: " << short_pkgname
 690                    << " action: " << action << endl;
 691    }
 692 }
 693                                                                         /*}}}*/
 694 // DPkgPM::handleDisappearAction                                        /*{{{*/
 695 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 696 {
 697    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 698    if (unlikely(Pkg.end() == true))
 699       return;
 700
 701    // record the package name for display and stuff later
 702    disappearedPkgs.insert(Pkg.FullName(true));
 703
 704    // the disappeared package was auto-installed - nothing to do
 705    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 706       return;
 707    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 708    if (unlikely(PkgVer.end() == true))
 709       return;
 710    /* search in the list of dependencies for (Pre)Depends,
 711       check if this dependency has a Replaces on our package
 712       and if so transfer the manual installed flag to it */
 713    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 714    {
 715       if (Dep->Type != pkgCache::Dep::Depends &&
 716           Dep->Type != pkgCache::Dep::PreDepends)
 717          continue;
 718       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 719       if (unlikely(Tar.end() == true))
 720          continue;
 721       // the package is already marked as manual
 722       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 723          continue;
 724       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 725       if (TarVer.end() == true)
 726          continue;
 727       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 728       {
 729          if (Rep->Type != pkgCache::Dep::Replaces)
 730             continue;
 731          if (Pkg != Rep.TargetPkg())
 732             continue;
 733          // okay, they are strongly connected - transfer manual-bit
 734          if (Debug == true)
 735             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 736          Cache[Tar].Flags &= ~Flag::Auto;
 737          break;
 738       }
 739    }
 740 }
 741                                                                         /*}}}*/
 742 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 743 // ---------------------------------------------------------------------
 744 /*
 745  */
 746 void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
 747 {
 748    char *p, *q;
 749    int len;
 750
 751    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 752    d->dpkgbuf_pos += len;
 753    if(len <= 0)
 754       return;
 755
 756    // process line by line if we have a buffer
 757    p = q = d->dpkgbuf;
 758    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 759    {
 760       *q = 0;
 761       ProcessDpkgStatusLine(p);
 762       p=q+1; // continue with next line
 763    }
 764
 765    // now move the unprocessed bits (after the final \n that is now a 0x0)
 766    // to the start and update d->dpkgbuf_pos
 767    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 768    if(p == NULL)
 769       return;
 770
 771    // we are interessted in the first char *after* 0x0
 772    p++;
 773
 774    // move the unprocessed tail to the start and update pos
 775    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 776    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 777 }
 778                                                                         /*}}}*/
 779 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 780 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 781 {
 782    size_t const length = value.length();
 783    if (length == 0)
 784       return;
 785    // poor mans rstrip(", ")
 786    if (value[length-2] == ',' && value[length-1] == ' ')
 787       value.erase(length - 2, 2);
 788    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 789 }                                                                       /*}}}*/
 790 // DPkgPM::OpenLog                                                      /*{{{*/
 791 bool pkgDPkgPM::OpenLog()
 792 {
 793    string const logdir = _config->FindDir("Dir::Log");
 794    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 795       // FIXME: use a better string after freeze
 796       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 797
 798    // get current time
 799    char timestr[200];
 800    time_t const t = time(NULL);
 801    struct tm const * const tmp = localtime(&t);
 802    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 803
 804    // open terminal log
 805    string const logfile_name = flCombine(logdir,
 806                                    _config->Find("Dir::Log::Terminal"));
 807    if (!logfile_name.empty())
 808    {
 809       d->term_out = fopen(logfile_name.c_str(),"a");
 810       if (d->term_out == NULL)
 811          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 812       setvbuf(d->term_out, NULL, _IONBF, 0);
 813       SetCloseExec(fileno(d->term_out), true);
 814       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 815       {
 816          struct passwd *pw = getpwnam("root");
 817          struct group *gr = getgrnam("adm");
 818          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 819             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 820       }
 821       if (chmod(logfile_name.c_str(), 0640) != 0)
 822          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 823       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 824    }
 825
 826    // write your history
 827    string const history_name = flCombine(logdir,
 828                                    _config->Find("Dir::Log::History"));
 829    if (!history_name.empty())
 830    {
 831       d->history_out = fopen(history_name.c_str(),"a");
 832       if (d->history_out == NULL)
 833          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 834       SetCloseExec(fileno(d->history_out), true);
 835       chmod(history_name.c_str(), 0644);
 836       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 837       string remove, purge, install, reinstall, upgrade, downgrade;
 838       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 839       {
 840          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 841          string *line = NULL;
 842          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 843          if (Cache[I].NewInstall() == true)
 844             HISTORYINFO(install, CANDIDATE_AUTO)
 845          else if (Cache[I].ReInstall() == true)
 846             HISTORYINFO(reinstall, CANDIDATE)
 847          else if (Cache[I].Upgrade() == true)
 848             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 849          else if (Cache[I].Downgrade() == true)
 850             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 851          else if (Cache[I].Delete() == true)
 852             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 853          else
 854             continue;
 855          #undef HISTORYINFO
 856          line->append(I.FullName(false)).append(" (");
 857          switch (infostring) {
 858          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 859          case CANDIDATE_AUTO:
 860             line->append(Cache[I].CandVersion);
 861             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 862                line->append(", automatic");
 863             break;
 864          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 865          case CURRENT: line->append(Cache[I].CurVersion); break;
 866          }
 867          line->append("), ");
 868       }
 869       if (_config->Exists("Commandline::AsString") == true)
 870          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 871       WriteHistoryTag("Install", install);
 872       WriteHistoryTag("Reinstall", reinstall);
 873       WriteHistoryTag("Upgrade", upgrade);
 874       WriteHistoryTag("Downgrade",downgrade);
 875       WriteHistoryTag("Remove",remove);
 876       WriteHistoryTag("Purge",purge);
 877       fflush(d->history_out);
 878    }
 879
 880    return true;
 881 }
 882                                                                         /*}}}*/
 883 // DPkg::CloseLog                                                       /*{{{*/
 884 bool pkgDPkgPM::CloseLog()
 885 {
 886    char timestr[200];
 887    time_t t = time(NULL);
 888    struct tm *tmp = localtime(&t);
 889    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 890
 891    if(d->term_out)
 892    {
 893       fprintf(d->term_out, "Log ended: ");
 894       fprintf(d->term_out, "%s", timestr);
 895       fprintf(d->term_out, "\n");
 896       fclose(d->term_out);
 897    }
 898    d->term_out = NULL;
 899
 900    if(d->history_out)
 901    {
 902       if (disappearedPkgs.empty() == false)
 903       {
 904          string disappear;
 905          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 906               d != disappearedPkgs.end(); ++d)
 907          {
 908             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 909             disappear.append(*d);
 910             if (P.end() == true)
 911                disappear.append(", ");
 912             else
 913                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 914          }
 915          WriteHistoryTag("Disappeared", disappear);
 916       }
 917       if (d->dpkg_error.empty() == false)
 918          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 919       fprintf(d->history_out, "End-Date: %s\n", timestr);
 920       fclose(d->history_out);
 921    }
 922    d->history_out = NULL;
 923
 924    return true;
 925 }
 926                                                                         /*}}}*/
 927                                                                         /*}}}*/
 928 /*{{{*/
 929 // This implements a racy version of pselect for those architectures
 930 // that don't have a working implementation.
 931 // FIXME: Probably can be removed on Lenny+1
 932 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 933    fd_set *exceptfds, const struct timespec *timeout,
 934    const sigset_t *sigmask)
 935 {
 936    sigset_t origmask;
 937    struct timeval tv;
 938    int retval;
 939
 940    tv.tv_sec = timeout->tv_sec;
 941    tv.tv_usec = timeout->tv_nsec/1000;
 942
 943    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 944    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 945    sigprocmask(SIG_SETMASK, &origmask, 0);
 946    return retval;
 947 }
 948                                                                         /*}}}*/
 949
 950 // DPkgPM::BuildPackagesProgressMap                                     /*{{{*/
 951 void pkgDPkgPM::BuildPackagesProgressMap()
 952 {
 953    // map the dpkg states to the operations that are performed
 954    // (this is sorted in the same way as Item::Ops)
 955    static const struct DpkgState DpkgStatesOpMap[][7] = {
 956       // Install operation
 957       {
 958          {"half-installed", N_("Preparing %s")},
 959          {"unpacked", N_("Unpacking %s") },
 960          {NULL, NULL}
 961       },
 962       // Configure operation
 963       {
 964          {"unpacked",N_("Preparing to configure %s") },
 965          {"half-configured", N_("Configuring %s") },
 966          { "installed", N_("Installed %s")},
 967          {NULL, NULL}
 968       },
 969       // Remove operation
 970       {
 971          {"half-configured", N_("Preparing for removal of %s")},
 972          {"half-installed", N_("Removing %s")},
 973          {"config-files",  N_("Removed %s")},
 974          {NULL, NULL}
 975       },
 976       // Purge operation
 977       {
 978          {"config-files", N_("Preparing to completely remove %s")},
 979          {"not-installed", N_("Completely removed %s")},
 980          {NULL, NULL}
 981       },
 982    };
 983
 984    // init the PackageOps map, go over the list of packages that
 985    // that will be [installed|configured|removed|purged] and add
 986    // them to the PackageOps map (the dpkg states it goes through)
 987    // and the PackageOpsTranslations (human readable strings)
 988    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
 989    {
 990       if((*I).Pkg.end() == true)
 991          continue;
 992
 993       string const name = (*I).Pkg.FullName();
 994       PackageOpsDone[name] = 0;
 995       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
 996       {
 997          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 998          PackagesTotal++;
 999       }
1000    }
1001 }
1002                                                                         /*}}}*/
1003 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR < 13)
1004 bool pkgDPkgPM::Go(int StatusFd)
1005 {
1006    APT::Progress::PackageManager *progress = NULL;
1007    if (StatusFd == -1)
1008       progress = APT::Progress::PackageManagerProgressFactory();
1009    else
1010       progress = new APT::Progress::PackageManagerProgressFd(StatusFd);
1011
1012    return GoNoABIBreak(progress);
1013 }
1014 #endif
1015
1016 // DPkgPM::Go - Run the sequence                                        /*{{{*/
1017 // ---------------------------------------------------------------------
1018 /* This globs the operations and calls dpkg
1019  *
1020  * If it is called with a progress object apt will report the install
1021  * progress to this object. It maps the dpkg states a package goes
1022  * through to human readable (and i10n-able)
1023  * names and calculates a percentage for each step.
1024  */
1025 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
1026 bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
1027 #else
1028 bool pkgDPkgPM::GoNoABIBreak(APT::Progress::PackageManager *progress)
1029 #endif
1030 {
1031    pkgPackageManager::SigINTStop = false;
1032    d->progress = progress;
1033
1034    // Generate the base argument list for dpkg
1035    unsigned long StartSize = 0;
1036    std::vector<const char *> Args;
1037    std::string DpkgExecutable = getDpkgExecutable();
1038    Args.push_back(DpkgExecutable.c_str());
1039    StartSize += DpkgExecutable.length();
1040
1041    // Stick in any custom dpkg options
1042    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
1043    if (Opts != 0)
1044    {
1045       Opts = Opts->Child;
1046       for (; Opts != 0; Opts = Opts->Next)
1047       {
1048          if (Opts->Value.empty() == true)
1049             continue;
1050          Args.push_back(Opts->Value.c_str());
1051          StartSize += Opts->Value.length();
1052       }
1053    }
1054
1055    size_t const BaseArgs = Args.size();
1056    // we need to detect if we can qualify packages with the architecture or not
1057    Args.push_back("--assert-multi-arch");
1058    Args.push_back(NULL);
1059
1060    pid_t dpkgAssertMultiArch = ExecFork();
1061    if (dpkgAssertMultiArch == 0)
1062    {
1063       dpkgChrootDirectory();
1064       // redirect everything to the ultimate sink as we only need the exit-status
1065       int const nullfd = open("/dev/null", O_RDONLY);
1066       dup2(nullfd, STDIN_FILENO);
1067       dup2(nullfd, STDOUT_FILENO);
1068       dup2(nullfd, STDERR_FILENO);
1069       execvp(Args[0], (char**) &Args[0]);
1070       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
1071       _exit(2);
1072    }
1073
1074    fd_set rfds;
1075    struct timespec tv;
1076    sigset_t sigmask;
1077    sigset_t original_sigmask;
1078
1079    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
1080    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
1081    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
1082
1083    if (RunScripts("DPkg::Pre-Invoke") == false)
1084       return false;
1085
1086    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
1087       return false;
1088
1089    // support subpressing of triggers processing for special
1090    // cases like d-i that runs the triggers handling manually
1091    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
1092    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
1093    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
1094       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
1095
1096    // for the progress
1097    BuildPackagesProgressMap();
1098
1099    d->stdin_is_dev_null = false;
1100
1101    // create log
1102    OpenLog();
1103
1104    bool dpkgMultiArch = false;
1105    if (dpkgAssertMultiArch > 0)
1106    {
1107       int Status = 0;
1108       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1109       {
1110          if (errno == EINTR)
1111             continue;
1112          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1113          break;
1114       }
1115       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1116          dpkgMultiArch = true;
1117    }
1118
1119    // go over each item
1120    vector<Item>::const_iterator I = List.begin();
1121    while (I != List.end())
1122    {
1123       // Do all actions with the same Op in one run
1124       vector<Item>::const_iterator J = I;
1125       if (TriggersPending == true)
1126          for (; J != List.end(); ++J)
1127          {
1128             if (J->Op == I->Op)
1129                continue;
1130             if (J->Op != Item::TriggersPending)
1131                break;
1132             vector<Item>::const_iterator T = J + 1;
1133             if (T != List.end() && T->Op == I->Op)
1134                continue;
1135             break;
1136          }
1137       else
1138          for (; J != List.end() && J->Op == I->Op; ++J)
1139             /* nothing */;
1140
1141       // keep track of allocated strings for multiarch package names
1142       std::vector<char *> Packages;
1143
1144       // start with the baseset of arguments
1145       unsigned long Size = StartSize;
1146       Args.erase(Args.begin() + BaseArgs, Args.end());
1147
1148       // Now check if we are within the MaxArgs limit
1149       //
1150       // this code below is problematic, because it may happen that
1151       // the argument list is split in a way that A depends on B
1152       // and they are in the same "--configure A B" run
1153       // - with the split they may now be configured in different
1154       //   runs, using Immediate-Configure-All can help prevent this.
1155       if (J - I > (signed)MaxArgs)
1156       {
1157          J = I + MaxArgs;
1158          unsigned long const size = MaxArgs + 10;
1159          Args.reserve(size);
1160          Packages.reserve(size);
1161       }
1162       else
1163       {
1164          unsigned long const size = (J - I) + 10;
1165          Args.reserve(size);
1166          Packages.reserve(size);
1167       }
1168
1169       int fd[2];
1170       if (pipe(fd) != 0)
1171          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1172
1173 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1174 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1175
1176       ADDARGC("--status-fd");
1177       char status_fd_buf[20];
1178       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1179       ADDARG(status_fd_buf);
1180       unsigned long const Op = I->Op;
1181
1182       switch (I->Op)
1183       {
1184          case Item::Remove:
1185          ADDARGC("--force-depends");
1186          ADDARGC("--force-remove-essential");
1187          ADDARGC("--remove");
1188          break;
1189
1190          case Item::Purge:
1191          ADDARGC("--force-depends");
1192          ADDARGC("--force-remove-essential");
1193          ADDARGC("--purge");
1194          break;
1195
1196          case Item::Configure:
1197          ADDARGC("--configure");
1198          break;
1199
1200          case Item::ConfigurePending:
1201          ADDARGC("--configure");
1202          ADDARGC("--pending");
1203          break;
1204
1205          case Item::TriggersPending:
1206          ADDARGC("--triggers-only");
1207          ADDARGC("--pending");
1208          break;
1209
1210          case Item::Install:
1211          ADDARGC("--unpack");
1212          ADDARGC("--auto-deconfigure");
1213          break;
1214       }
1215
1216       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1217           I->Op != Item::ConfigurePending)
1218       {
1219          ADDARGC("--no-triggers");
1220       }
1221 #undef ADDARGC
1222
1223       // Write in the file or package names
1224       if (I->Op == Item::Install)
1225       {
1226          for (;I != J && Size < MaxArgBytes; ++I)
1227          {
1228             if (I->File[0] != '/')
1229                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1230             Args.push_back(I->File.c_str());
1231             Size += I->File.length();
1232          }
1233       }
1234       else
1235       {
1236          string const nativeArch = _config->Find("APT::Architecture");
1237          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1238          for (;I != J && Size < MaxArgBytes; ++I)
1239          {
1240             if((*I).Pkg.end() == true)
1241                continue;
1242             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.FullName(true)) != disappearedPkgs.end())
1243                continue;
1244             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1245             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1246                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1247                                            strcmp(I->Pkg.Arch(), "none") == 0))
1248             {
1249                char const * const name = I->Pkg.Name();
1250                ADDARG(name);
1251             }
1252             else
1253             {
1254                pkgCache::VerIterator PkgVer;
1255                std::string name = I->Pkg.Name();
1256                if (Op == Item::Remove || Op == Item::Purge)
1257                {
1258                   PkgVer = I->Pkg.CurrentVer();
1259                   if(PkgVer.end() == true)
1260                      PkgVer = FindNowVersion(I->Pkg);
1261                }
1262                else
1263                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1264                if (strcmp(I->Pkg.Arch(), "none") == 0)
1265                   ; // never arch-qualify a package without an arch
1266                else if (PkgVer.end() == false)
1267                   name.append(":").append(PkgVer.Arch());
1268                else
1269                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1270                char * const fullname = strdup(name.c_str());
1271                Packages.push_back(fullname);
1272                ADDARG(fullname);
1273             }
1274          }
1275          // skip configure action if all sheduled packages disappeared
1276          if (oldSize == Size)
1277             continue;
1278       }
1279 #undef ADDARG
1280
1281       J = I;
1282
1283       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1284       {
1285          for (std::vector<const char *>::const_iterator a = Args.begin();
1286               a != Args.end(); ++a)
1287             clog << *a << ' ';
1288          clog << endl;
1289          continue;
1290       }
1291       Args.push_back(NULL);
1292
1293       cout << flush;
1294       clog << flush;
1295       cerr << flush;
1296
1297       /* Mask off sig int/quit. We do this because dpkg also does when
1298          it forks scripts. What happens is that when you hit ctrl-c it sends
1299          it to all processes in the group. Since dpkg ignores the signal
1300          it doesn't die but we do! So we must also ignore it */
1301       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1302       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1303
1304       // Check here for any SIGINT
1305       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1306          break;
1307
1308
1309       // ignore SIGHUP as well (debian #463030)
1310       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1311
1312       struct    termios tt;
1313       struct    winsize win;
1314       int       master = -1;
1315       int       slave = -1;
1316
1317       // if tcgetattr does not return zero there was a error
1318       // and we do not do any pty magic
1319       _error->PushToStack();
1320       if (tcgetattr(STDOUT_FILENO, &tt) == 0)
1321       {
1322          ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&win);
1323          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1324          {
1325             _error->Errno("openpty", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1326             master = slave = -1;
1327          }  else {
1328             struct termios rtt;
1329             rtt = tt;
1330             cfmakeraw(&rtt);
1331             rtt.c_lflag &= ~ECHO;
1332             rtt.c_lflag |= ISIG;
1333             // block SIGTTOU during tcsetattr to prevent a hang if
1334             // the process is a member of the background process group
1335             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1336             sigemptyset(&sigmask);
1337             sigaddset(&sigmask, SIGTTOU);
1338             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1339             tcsetattr(0, TCSAFLUSH, &rtt);
1340             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1341          }
1342       }
1343       // complain only if stdout is either a terminal (but still failed) or is an invalid
1344       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1345       else if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1346          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1347
1348       if (_error->PendingError() == true)
1349          _error->DumpErrors(std::cerr);
1350       _error->RevertToStack();
1351
1352       // this is the dpkg status-fd, we need to keep it
1353       _config->Set("APT::Keep-Fds::",fd[1]);
1354
1355       // Tell the progress that its starting and fork dpkg
1356       // FIXME: this is called once per dpkg run which is *too often*
1357       d->progress->Start();
1358
1359       pid_t Child = ExecFork();
1360       // This is the child
1361       if (Child == 0)
1362       {
1363
1364          if(slave >= 0 && master >= 0)
1365          {
1366             setsid();
1367             ioctl(slave, TIOCSCTTY, 0);
1368             close(master);
1369             dup2(slave, 0);
1370             dup2(slave, 1);
1371             dup2(slave, 2);
1372             close(slave);
1373          }
1374          close(fd[0]); // close the read end of the pipe
1375
1376          dpkgChrootDirectory();
1377
1378          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1379             _exit(100);
1380
1381          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1382          {
1383             int Flags,dummy;
1384             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1385                _exit(100);
1386
1387             // Discard everything in stdin before forking dpkg
1388             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1389                _exit(100);
1390
1391             while (read(STDIN_FILENO,&dummy,1) == 1);
1392
1393             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1394                _exit(100);
1395          }
1396          /* No Job Control Stop Env is a magic dpkg var that prevents it
1397             from using sigstop */
1398          putenv((char *)"DPKG_NO_TSTP=yes");
1399          execvp(Args[0], (char**) &Args[0]);
1400          cerr << "Could not exec dpkg!" << endl;
1401          _exit(100);
1402       }
1403
1404       // apply ionice
1405       if (_config->FindB("DPkg::UseIoNice", false) == true)
1406          ionice(Child);
1407
1408       // clear the Keep-Fd again
1409       _config->Clear("APT::Keep-Fds",fd[1]);
1410
1411       // Wait for dpkg
1412       int Status = 0;
1413
1414       // we read from dpkg here
1415       int const _dpkgin = fd[0];
1416       close(fd[1]);                        // close the write end of the pipe
1417
1418       if(slave > 0)
1419          close(slave);
1420
1421       // setups fds
1422       sigemptyset(&sigmask);
1423       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1424
1425       /* free vectors (and therefore memory) as we don't need the included data anymore */
1426       for (std::vector<char *>::const_iterator p = Packages.begin();
1427            p != Packages.end(); ++p)
1428          free(*p);
1429       Packages.clear();
1430
1431       // the result of the waitpid call
1432       int res;
1433       int select_ret;
1434       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1435          if(res < 0) {
1436             // FIXME: move this to a function or something, looks ugly here
1437             // error handling, waitpid returned -1
1438             if (errno == EINTR)
1439                continue;
1440             RunScripts("DPkg::Post-Invoke");
1441
1442             // Restore sig int/quit
1443             signal(SIGQUIT,old_SIGQUIT);
1444             signal(SIGINT,old_SIGINT);
1445
1446             signal(SIGHUP,old_SIGHUP);
1447             return _error->Errno("waitpid","Couldn't wait for subprocess");
1448          }
1449
1450          // wait for input or output here
1451          FD_ZERO(&rfds);
1452          if (master >= 0 && !d->stdin_is_dev_null)
1453             FD_SET(0, &rfds);
1454          FD_SET(_dpkgin, &rfds);
1455          if(master >= 0)
1456             FD_SET(master, &rfds);
1457          tv.tv_sec = 0;
1458          tv.tv_nsec = d->progress->GetPulseInterval();
1459          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1460                               &tv, &original_sigmask);
1461          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1462             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1463                                       NULL, &tv, &original_sigmask);
1464
1465          d->progress->Pulse();
1466
1467          if (select_ret == 0)
1468             continue;
1469          else if (select_ret < 0 && errno == EINTR)
1470             continue;
1471          else if (select_ret < 0)
1472          {
1473             perror("select() returned error");
1474             continue;
1475          }
1476
1477          if(master >= 0 && FD_ISSET(master, &rfds))
1478             DoTerminalPty(master);
1479          if(master >= 0 && FD_ISSET(0, &rfds))
1480             DoStdin(master);
1481          if(FD_ISSET(_dpkgin, &rfds))
1482             DoDpkgStatusFd(_dpkgin);
1483       }
1484       close(_dpkgin);
1485
1486       // Restore sig int/quit
1487       signal(SIGQUIT,old_SIGQUIT);
1488       signal(SIGINT,old_SIGINT);
1489
1490       signal(SIGHUP,old_SIGHUP);
1491
1492       if(master >= 0)
1493       {
1494          tcsetattr(0, TCSAFLUSH, &tt);
1495          close(master);
1496       }
1497
1498       // Check for an error code.
1499       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1500       {
1501          // if it was set to "keep-dpkg-runing" then we won't return
1502          // here but keep the loop going and just report it as a error
1503          // for later
1504          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1505
1506          if(stopOnError)
1507             RunScripts("DPkg::Post-Invoke");
1508
1509          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1510             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1511          else if (WIFEXITED(Status) != 0)
1512             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1513          else
1514             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1515
1516          if(d->dpkg_error.size() > 0)
1517             _error->Error("%s", d->dpkg_error.c_str());
1518
1519          if(stopOnError)
1520          {
1521             CloseLog();
1522             d->progress->Stop();
1523             return false;
1524          }
1525       }
1526    }
1527    CloseLog();
1528
1529    // dpkg is done at this point
1530    d->progress->Stop();
1531
1532    if (pkgPackageManager::SigINTStop)
1533        _error->Warning(_("Operation was interrupted before it could finish"));
1534
1535    if (RunScripts("DPkg::Post-Invoke") == false)
1536       return false;
1537
1538    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1539    {
1540       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1541       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1542           unlink(oldpkgcache.c_str()) == 0)
1543       {
1544          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1545          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1546          {
1547             _error->PushToStack();
1548             pkgCacheFile CacheFile;
1549             CacheFile.BuildCaches(NULL, true);
1550             _error->RevertToStack();
1551          }
1552       }
1553    }
1554
1555    Cache.writeStateFile(NULL);
1556    return true;
1557 }
1558
1559 void SigINT(int sig) {
1560    pkgPackageManager::SigINTStop = true;
1561 }
1562                                                                         /*}}}*/
1563 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1564 // ---------------------------------------------------------------------
1565 /* */
1566 void pkgDPkgPM::Reset()
1567 {
1568    List.erase(List.begin(),List.end());
1569 }
1570                                                                         /*}}}*/
1571 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1572 // ---------------------------------------------------------------------
1573 /* */
1574 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1575 {
1576    // If apport doesn't exist or isn't installed do nothing
1577    // This e.g. prevents messages in 'universes' without apport
1578    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1579    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1580       return;
1581
1582    string pkgname, reportfile, srcpkgname, pkgver, arch;
1583    string::size_type pos;
1584    FILE *report;
1585
1586    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1587    {
1588       std::clog << "configured to not write apport reports" << std::endl;
1589       return;
1590    }
1591
1592    // only report the first errors
1593    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1594    {
1595       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1596       return;
1597    }
1598
1599    // check if its not a follow up error
1600    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1601    if(strstr(errormsg, needle) != NULL) {
1602       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1603       return;
1604    }
1605
1606    // do not report disk-full failures
1607    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1608       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1609       return;
1610    }
1611
1612    // do not report out-of-memory failures
1613    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1614       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1615       return;
1616    }
1617
1618    // do not report dpkg I/O errors
1619    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1620    if(strstr(errormsg, "short read in buffer_copy (")) {
1621       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1622       return;
1623    }
1624
1625    // get the pkgname and reportfile
1626    pkgname = flNotDir(pkgpath);
1627    pos = pkgname.find('_');
1628    if(pos != string::npos)
1629       pkgname = pkgname.substr(0, pos);
1630
1631    // find the package versin and source package name
1632    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1633    if (Pkg.end() == true)
1634       return;
1635    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1636    if (Ver.end() == true)
1637       return;
1638    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1639    pkgRecords Recs(Cache);
1640    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1641    srcpkgname = Parse.SourcePkg();
1642    if(srcpkgname.empty())
1643       srcpkgname = pkgname;
1644
1645    // if the file exists already, we check:
1646    // - if it was reported already (touched by apport).
1647    //   If not, we do nothing, otherwise
1648    //    we overwrite it. This is the same behaviour as apport
1649    // - if we have a report with the same pkgversion already
1650    //   then we skip it
1651    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1652    if(FileExists(reportfile))
1653    {
1654       struct stat buf;
1655       char strbuf[255];
1656
1657       // check atime/mtime
1658       stat(reportfile.c_str(), &buf);
1659       if(buf.st_mtime > buf.st_atime)
1660          return;
1661
1662       // check if the existing report is the same version
1663       report = fopen(reportfile.c_str(),"r");
1664       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1665       {
1666          if(strstr(strbuf,"Package:") == strbuf)
1667          {
1668             char pkgname[255], version[255];
1669             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1670                if(strcmp(pkgver.c_str(), version) == 0)
1671                {
1672                   fclose(report);
1673                   return;
1674                }
1675          }
1676       }
1677       fclose(report);
1678    }
1679
1680    // now write the report
1681    arch = _config->Find("APT::Architecture");
1682    report = fopen(reportfile.c_str(),"w");
1683    if(report == NULL)
1684       return;
1685    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1686       chmod(reportfile.c_str(), 0);
1687    else
1688       chmod(reportfile.c_str(), 0600);
1689    fprintf(report, "ProblemType: Package\n");
1690    fprintf(report, "Architecture: %s\n", arch.c_str());
1691    time_t now = time(NULL);
1692    fprintf(report, "Date: %s" , ctime(&now));
1693    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1694    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1695    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1696
1697    // ensure that the log is flushed
1698    if(d->term_out)
1699       fflush(d->term_out);
1700
1701    // attach terminal log it if we have it
1702    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1703    if (!logfile_name.empty())
1704    {
1705       FILE *log = NULL;
1706
1707       fprintf(report, "DpkgTerminalLog:\n");
1708       log = fopen(logfile_name.c_str(),"r");
1709       if(log != NULL)
1710       {
1711          char buf[1024];
1712          while( fgets(buf, sizeof(buf), log) != NULL)
1713             fprintf(report, " %s", buf);
1714          fclose(log);
1715       }
1716    }
1717
1718    // log the ordering
1719    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1720    fprintf(report, "AptOrdering:\n");
1721    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1722       if ((*I).Pkg != NULL)
1723          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1724       else
1725          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1726
1727    // attach dmesg log (to learn about segfaults)
1728    if (FileExists("/bin/dmesg"))
1729    {
1730       fprintf(report, "Dmesg:\n");
1731       FILE *log = popen("/bin/dmesg","r");
1732       if(log != NULL)
1733       {
1734          char buf[1024];
1735          while( fgets(buf, sizeof(buf), log) != NULL)
1736             fprintf(report, " %s", buf);
1737          pclose(log);
1738       }
1739    }
1740
1741    // attach df -l log (to learn about filesystem status)
1742    if (FileExists("/bin/df"))
1743    {
1744
1745       fprintf(report, "Df:\n");
1746       FILE *log = popen("/bin/df -l","r");
1747       if(log != NULL)
1748       {
1749          char buf[1024];
1750          while( fgets(buf, sizeof(buf), log) != NULL)
1751             fprintf(report, " %s", buf);
1752          pclose(log);
1753       }
1754    }
1755
1756    fclose(report);
1757
1758 }
1759                                                                         /*}}}*/