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