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