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