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