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/cachefile.h>
  14 #include <apt-pkg/configuration.h>
  15 #include <apt-pkg/depcache.h>
  16 #include <apt-pkg/dpkgpm.h>
  17 #include <apt-pkg/error.h>
  18 #include <apt-pkg/fileutl.h>
  19 #include <apt-pkg/install-progress.h>
  20 #include <apt-pkg/packagemanager.h>
  21 #include <apt-pkg/pkgrecords.h>
  22 #include <apt-pkg/strutl.h>
  23 #include <apt-pkg/cacheiterators.h>
  24 #include <apt-pkg/macros.h>
  25 #include <apt-pkg/pkgcache.h>
  26
  27 #include <errno.h>
  28 #include <fcntl.h>
  29 #include <grp.h>
  30 #include <pty.h>
  31 #include <pwd.h>
  32 #include <signal.h>
  33 #include <stddef.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/select.h>
  38 #include <sys/stat.h>
  39 #include <sys/time.h>
  40 #include <sys/wait.h>
  41 #include <termios.h>
  42 #include <time.h>
  43 #include <unistd.h>
  44 #include <algorithm>
  45 #include <cstring>
  46 #include <iostream>
  47 #include <map>
  48 #include <set>
  49 #include <string>
  50 #include <utility>
  51 #include <vector>
  52
  53 #include <apti18n.h>
  54                                                                         /*}}}*/
  55
  56 using namespace std;
  57
  58 APT_PURE static unsigned int
  59 EnvironmentSize()
  60 {
  61   unsigned int size = 0;
  62   char **envp = environ;
  63
  64   while (*envp != NULL)
  65     size += strlen (*envp++) + 1;
  66
  67   return size;
  68 }
  69
  70 class pkgDPkgPMPrivate
  71 {
  72 public:
  73    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  74                         term_out(NULL), history_out(NULL),
  75                         progress(NULL), master(-1), slave(NULL)
  76    {
  77       dpkgbuf[0] = '\0';
  78    }
  79    ~pkgDPkgPMPrivate()
  80    {
  81    }
  82    bool stdin_is_dev_null;
  83    // the buffer we use for the dpkg status-fd reading
  84    char dpkgbuf[1024];
  85    int dpkgbuf_pos;
  86    FILE *term_out;
  87    FILE *history_out;
  88    string dpkg_error;
  89    APT::Progress::PackageManager *progress;
  90
  91    // pty stuff
  92    struct termios tt;
  93    int master;
  94    char * slave;
  95
  96    // signals
  97    sigset_t sigmask;
  98    sigset_t original_sigmask;
  99
 100 };
 101
 102 namespace
 103 {
 104   // Maps the dpkg "processing" info to human readable names.  Entry 0
 105   // of each array is the key, entry 1 is the value.
 106   const std::pair<const char *, const char *> PackageProcessingOps[] = {
 107     std::make_pair("install",   N_("Installing %s")),
 108     std::make_pair("configure", N_("Configuring %s")),
 109     std::make_pair("remove",    N_("Removing %s")),
 110     std::make_pair("purge",    N_("Completely removing %s")),
 111     std::make_pair("disappear", N_("Noting disappearance of %s")),
 112     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
 113   };
 114
 115   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
 116   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
 117
 118   // Predicate to test whether an entry in the PackageProcessingOps
 119   // array matches a string.
 120   class MatchProcessingOp
 121   {
 122     const char *target;
 123
 124   public:
 125     MatchProcessingOp(const char *the_target)
 126       : target(the_target)
 127     {
 128     }
 129
 130     bool operator()(const std::pair<const char *, const char *> &pair) const
 131     {
 132       return strcmp(pair.first, target) == 0;
 133     }
 134   };
 135 }
 136
 137 /* helper function to ionice the given PID
 138
 139  there is no C header for ionice yet - just the syscall interface
 140  so we use the binary from util-linux
 141 */
 142 static bool
 143 ionice(int PID)
 144 {
 145    if (!FileExists("/usr/bin/ionice"))
 146       return false;
 147    pid_t Process = ExecFork();
 148    if (Process == 0)
 149    {
 150       char buf[32];
 151       snprintf(buf, sizeof(buf), "-p%d", PID);
 152       const char *Args[4];
 153       Args[0] = "/usr/bin/ionice";
 154       Args[1] = "-c3";
 155       Args[2] = buf;
 156       Args[3] = 0;
 157       execv(Args[0], (char **)Args);
 158    }
 159    return ExecWait(Process, "ionice");
 160 }
 161
 162 static std::string getDpkgExecutable()
 163 {
 164    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 165    string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 166    size_t dpkgChrootLen = dpkgChrootDir.length();
 167    if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 168    {
 169       if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 170          --dpkgChrootLen;
 171       Tmp = Tmp.substr(dpkgChrootLen);
 172    }
 173    return Tmp;
 174 }
 175
 176 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 177 static void dpkgChrootDirectory()
 178 {
 179    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 180    if (chrootDir == "/")
 181       return;
 182    std::cerr << "Chrooting into " << chrootDir << std::endl;
 183    if (chroot(chrootDir.c_str()) != 0)
 184       _exit(100);
 185    if (chdir("/") != 0)
 186       _exit(100);
 187 }
 188                                                                         /*}}}*/
 189
 190
 191 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 192 // ---------------------------------------------------------------------
 193 /* This is helpful when a package is no longer installed but has residual
 194  * config files
 195  */
 196 static
 197 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 198 {
 199    pkgCache::VerIterator Ver;
 200    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 201    {
 202       pkgCache::VerFileIterator Vf = Ver.FileList();
 203       pkgCache::PkgFileIterator F = Vf.File();
 204       for (F = Vf.File(); F.end() == false; ++F)
 205       {
 206          if (F && F.Archive())
 207          {
 208             if (strcmp(F.Archive(), "now"))
 209                return Ver;
 210          }
 211       }
 212    }
 213    return Ver;
 214 }
 215                                                                         /*}}}*/
 216
 217 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 218 // ---------------------------------------------------------------------
 219 /* */
 220 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 221    : pkgPackageManager(Cache), pkgFailures(0), PackagesDone(0), PackagesTotal(0)
 222 {
 223    d = new pkgDPkgPMPrivate();
 224 }
 225                                                                         /*}}}*/
 226 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 227 // ---------------------------------------------------------------------
 228 /* */
 229 pkgDPkgPM::~pkgDPkgPM()
 230 {
 231    delete d;
 232 }
 233                                                                         /*}}}*/
 234 // DPkgPM::Install - Install a package                                  /*{{{*/
 235 // ---------------------------------------------------------------------
 236 /* Add an install operation to the sequence list */
 237 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 238 {
 239    if (File.empty() == true || Pkg.end() == true)
 240       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 241
 242    // If the filename string begins with DPkg::Chroot-Directory, return the
 243    // substr that is within the chroot so dpkg can access it.
 244    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 245    if (chrootdir != "/" && File.find(chrootdir) == 0)
 246    {
 247       size_t len = chrootdir.length();
 248       if (chrootdir.at(len - 1) == '/')
 249         len--;
 250       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 251    }
 252    else
 253       List.push_back(Item(Item::Install,Pkg,File));
 254
 255    return true;
 256 }
 257                                                                         /*}}}*/
 258 // DPkgPM::Configure - Configure a package                              /*{{{*/
 259 // ---------------------------------------------------------------------
 260 /* Add a configure operation to the sequence list */
 261 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 262 {
 263    if (Pkg.end() == true)
 264       return false;
 265
 266    List.push_back(Item(Item::Configure, Pkg));
 267
 268    // Use triggers for config calls if we configure "smart"
 269    // as otherwise Pre-Depends will not be satisfied, see #526774
 270    if (_config->FindB("DPkg::TriggersPending", false) == true)
 271       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 272
 273    return true;
 274 }
 275                                                                         /*}}}*/
 276 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 277 // ---------------------------------------------------------------------
 278 /* Add a remove operation to the sequence list */
 279 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 280 {
 281    if (Pkg.end() == true)
 282       return false;
 283
 284    if (Purge == true)
 285       List.push_back(Item(Item::Purge,Pkg));
 286    else
 287       List.push_back(Item(Item::Remove,Pkg));
 288    return true;
 289 }
 290                                                                         /*}}}*/
 291 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 292 // ---------------------------------------------------------------------
 293 /* This is part of the helper script communication interface, it sends
 294    very complete information down to the other end of the pipe.*/
 295 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 296 {
 297    return SendPkgsInfo(F, 2);
 298 }
 299 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 300 {
 301    // This version of APT supports only v3, so don't sent higher versions
 302    if (Version <= 3)
 303       fprintf(F,"VERSION %u\n", Version);
 304    else
 305       fprintf(F,"VERSION 3\n");
 306
 307    /* Write out all of the configuration directives by walking the
 308       configuration tree */
 309    const Configuration::Item *Top = _config->Tree(0);
 310    for (; Top != 0;)
 311    {
 312       if (Top->Value.empty() == false)
 313       {
 314          fprintf(F,"%s=%s\n",
 315                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 316                  QuoteString(Top->Value,"\n").c_str());
 317       }
 318
 319       if (Top->Child != 0)
 320       {
 321          Top = Top->Child;
 322          continue;
 323       }
 324
 325       while (Top != 0 && Top->Next == 0)
 326          Top = Top->Parent;
 327       if (Top != 0)
 328          Top = Top->Next;
 329    }
 330    fprintf(F,"\n");
 331
 332    // Write out the package actions in order.
 333    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 334    {
 335       if(I->Pkg.end() == true)
 336          continue;
 337
 338       pkgDepCache::StateCache &S = Cache[I->Pkg];
 339
 340       fprintf(F,"%s ",I->Pkg.Name());
 341
 342       // Current version which we are going to replace
 343       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 344       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 345          CurVer = FindNowVersion(I->Pkg);
 346
 347       if (CurVer.end() == true)
 348       {
 349          if (Version <= 2)
 350             fprintf(F, "- ");
 351          else
 352             fprintf(F, "- - none ");
 353       }
 354       else
 355       {
 356          fprintf(F, "%s ", CurVer.VerStr());
 357          if (Version >= 3)
 358             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 359       }
 360
 361       // Show the compare operator between current and install version
 362       if (S.InstallVer != 0)
 363       {
 364          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 365          int Comp = 2;
 366          if (CurVer.end() == false)
 367             Comp = InstVer.CompareVer(CurVer);
 368          if (Comp < 0)
 369             fprintf(F,"> ");
 370          else if (Comp == 0)
 371             fprintf(F,"= ");
 372          else if (Comp > 0)
 373             fprintf(F,"< ");
 374          fprintf(F, "%s ", InstVer.VerStr());
 375          if (Version >= 3)
 376             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 377       }
 378       else
 379       {
 380          if (Version <= 2)
 381             fprintf(F, "> - ");
 382          else
 383             fprintf(F, "> - - none ");
 384       }
 385
 386       // Show the filename/operation
 387       if (I->Op == Item::Install)
 388       {
 389          // No errors here..
 390          if (I->File[0] != '/')
 391             fprintf(F,"**ERROR**\n");
 392          else
 393             fprintf(F,"%s\n",I->File.c_str());
 394       }
 395       else if (I->Op == Item::Configure)
 396          fprintf(F,"**CONFIGURE**\n");
 397       else if (I->Op == Item::Remove ||
 398           I->Op == Item::Purge)
 399          fprintf(F,"**REMOVE**\n");
 400
 401       if (ferror(F) != 0)
 402          return false;
 403    }
 404    return true;
 405 }
 406                                                                         /*}}}*/
 407 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 408 // ---------------------------------------------------------------------
 409 /* This looks for a list of scripts to run from the configuration file
 410    each one is run and is fed on standard input a list of all .deb files
 411    that are due to be installed. */
 412 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 413 {
 414    bool result = true;
 415
 416    Configuration::Item const *Opts = _config->Tree(Cnf);
 417    if (Opts == 0 || Opts->Child == 0)
 418       return true;
 419    Opts = Opts->Child;
 420
 421    sighandler_t old_sigpipe = signal(SIGPIPE, SIG_IGN);
 422
 423    unsigned int Count = 1;
 424    for (; Opts != 0; Opts = Opts->Next, Count++)
 425    {
 426       if (Opts->Value.empty() == true)
 427          continue;
 428
 429       if(_config->FindB("Debug::RunScripts", false) == true)
 430          std::clog << "Running external script with list of all .deb file: '"
 431                    << Opts->Value << "'" << std::endl;
 432
 433       // Determine the protocol version
 434       string OptSec = Opts->Value;
 435       string::size_type Pos;
 436       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 437          Pos = OptSec.length();
 438       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 439
 440       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 441       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 442
 443       // Create the pipes
 444       std::set<int> KeepFDs;
 445       MergeKeepFdsFromConfiguration(KeepFDs);
 446       int Pipes[2];
 447       if (pipe(Pipes) != 0) {
 448          result = _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 449          break;
 450       }
 451       if (InfoFD != (unsigned)Pipes[0])
 452          SetCloseExec(Pipes[0],true);
 453       else
 454          KeepFDs.insert(Pipes[0]);
 455
 456
 457       SetCloseExec(Pipes[1],true);
 458
 459       // Purified Fork for running the script
 460       pid_t Process = ExecFork(KeepFDs);
 461       if (Process == 0)
 462       {
 463          // Setup the FDs
 464          dup2(Pipes[0], InfoFD);
 465          SetCloseExec(STDOUT_FILENO,false);
 466          SetCloseExec(STDIN_FILENO,false);
 467          SetCloseExec(STDERR_FILENO,false);
 468
 469          string hookfd;
 470          strprintf(hookfd, "%d", InfoFD);
 471          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 472
 473          dpkgChrootDirectory();
 474          const char *Args[4];
 475          Args[0] = "/bin/sh";
 476          Args[1] = "-c";
 477          Args[2] = Opts->Value.c_str();
 478          Args[3] = 0;
 479          execv(Args[0],(char **)Args);
 480          _exit(100);
 481       }
 482       close(Pipes[0]);
 483       FILE *F = fdopen(Pipes[1],"w");
 484       if (F == 0) {
 485          result = _error->Errno("fdopen","Faild to open new FD");
 486          break;
 487       }
 488
 489       // Feed it the filenames.
 490       if (Version <= 1)
 491       {
 492          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 493          {
 494             // Only deal with packages to be installed from .deb
 495             if (I->Op != Item::Install)
 496                continue;
 497
 498             // No errors here..
 499             if (I->File[0] != '/')
 500                continue;
 501
 502             /* Feed the filename of each package that is pending install
 503                into the pipe. */
 504             fprintf(F,"%s\n",I->File.c_str());
 505             if (ferror(F) != 0)
 506                break;
 507          }
 508       }
 509       else
 510          SendPkgsInfo(F, Version);
 511
 512       fclose(F);
 513
 514       // Clean up the sub process
 515       if (ExecWait(Process,Opts->Value.c_str()) == false) {
 516          result = _error->Error("Failure running script %s",Opts->Value.c_str());
 517          break;
 518       }
 519    }
 520    signal(SIGPIPE, old_sigpipe);
 521
 522    return result;
 523 }
 524                                                                         /*}}}*/
 525 // DPkgPM::DoStdin - Read stdin and pass to master pty                  /*{{{*/
 526 // ---------------------------------------------------------------------
 527 /*
 528 */
 529 void pkgDPkgPM::DoStdin(int master)
 530 {
 531    unsigned char input_buf[256] = {0,};
 532    ssize_t len = read(STDIN_FILENO, input_buf, sizeof(input_buf));
 533    if (len)
 534       FileFd::Write(master, input_buf, len);
 535    else
 536       d->stdin_is_dev_null = true;
 537 }
 538                                                                         /*}}}*/
 539 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 540 // ---------------------------------------------------------------------
 541 /*
 542  * read the terminal pty and write log
 543  */
 544 void pkgDPkgPM::DoTerminalPty(int master)
 545 {
 546    unsigned char term_buf[1024] = {0,0, };
 547
 548    ssize_t len=read(master, term_buf, sizeof(term_buf));
 549    if(len == -1 && errno == EIO)
 550    {
 551       // this happens when the child is about to exit, we
 552       // give it time to actually exit, otherwise we run
 553       // into a race so we sleep for half a second.
 554       struct timespec sleepfor = { 0, 500000000 };
 555       nanosleep(&sleepfor, NULL);
 556       return;
 557    }
 558    if(len <= 0)
 559       return;
 560    FileFd::Write(1, term_buf, len);
 561    if(d->term_out)
 562       fwrite(term_buf, len, sizeof(char), d->term_out);
 563 }
 564                                                                         /*}}}*/
 565 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 566 // ---------------------------------------------------------------------
 567 /*
 568  */
 569 void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
 570 {
 571    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 572    if (Debug == true)
 573       std::clog << "got from dpkg '" << line << "'" << std::endl;
 574
 575    /* dpkg sends strings like this:
 576       'status:   <pkg>: <pkg  qstate>'
 577       'status:   <pkg>:<arch>: <pkg  qstate>'
 578
 579       'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: pkg'
 580       'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: trigger'
 581    */
 582
 583    // we need to split on ": " (note the appended space) as the ':' is
 584    // part of the pkgname:arch information that dpkg sends
 585    //
 586    // A dpkg error message may contain additional ":" (like
 587    //  "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 588    // so we need to ensure to not split too much
 589    std::vector<std::string> list = StringSplit(line, ": ", 4);
 590    if(list.size() < 3)
 591    {
 592       if (Debug == true)
 593          std::clog << "ignoring line: not enough ':'" << std::endl;
 594       return;
 595    }
 596
 597    // build the (prefix, pkgname, action) tuple, position of this
 598    // is different for "processing" or "status" messages
 599    std::string prefix = APT::String::Strip(list[0]);
 600    std::string pkgname;
 601    std::string action;
 602
 603    // "processing" has the form "processing: action: pkg or trigger"
 604    // with action = ["install", "upgrade", "configure", "remove", "purge",
 605    //                "disappear", "trigproc"]
 606    if (prefix == "processing")
 607    {
 608       pkgname = APT::String::Strip(list[2]);
 609       action = APT::String::Strip(list[1]);
 610       // we don't care for the difference (as dpkg doesn't really either)
 611       if (action == "upgrade")
 612          action = "install";
 613    }
 614    // "status" has the form: "status: pkg: state"
 615    // with state in ["half-installed", "unpacked", "half-configured",
 616    //                "installed", "config-files", "not-installed"]
 617    else if (prefix == "status")
 618    {
 619       pkgname = APT::String::Strip(list[1]);
 620       action = APT::String::Strip(list[2]);
 621    } else {
 622       if (Debug == true)
 623          std::clog << "unknown prefix '" << prefix << "'" << std::endl;
 624       return;
 625    }
 626
 627
 628    /* handle the special cases first:
 629
 630       errors look like this:
 631       '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
 632       and conffile-prompt like this
 633       'status:/etc/compiz.conf/compiz.conf :  conffile-prompt: 'current-conffile' 'new-conffile' useredited distedited
 634    */
 635    if (prefix == "status")
 636    {
 637       if(action == "error")
 638       {
 639          d->progress->Error(pkgname, PackagesDone, PackagesTotal,
 640                             list[3]);
 641          pkgFailures++;
 642          WriteApportReport(pkgname.c_str(), list[3].c_str());
 643          return;
 644       }
 645       else if(action == "conffile-prompt")
 646       {
 647          d->progress->ConffilePrompt(pkgname, PackagesDone, PackagesTotal,
 648                                      list[3]);
 649          return;
 650       }
 651    }
 652
 653    // at this point we know that we should have a valid pkgname, so build all
 654    // the info from it
 655
 656    // dpkg does not always send "pkgname:arch" so we add it here if needed
 657    if (pkgname.find(":") == std::string::npos)
 658    {
 659       // find the package in the group that is touched by dpkg
 660       // if there are multiple pkgs dpkg would send us a full pkgname:arch
 661       pkgCache::GrpIterator Grp = Cache.FindGrp(pkgname);
 662       if (Grp.end() == false)
 663       {
 664          pkgCache::PkgIterator P = Grp.PackageList();
 665          for (; P.end() != true; P = Grp.NextPkg(P))
 666          {
 667             if(Cache[P].Keep() == false || Cache[P].ReInstall() == true)
 668             {
 669                pkgname = P.FullName();
 670                break;
 671             }
 672          }
 673       }
 674    }
 675
 676    const char* const pkg = pkgname.c_str();
 677    std::string short_pkgname = StringSplit(pkgname, ":")[0];
 678    std::string arch = "";
 679    if (pkgname.find(":") != string::npos)
 680       arch = StringSplit(pkgname, ":")[1];
 681    std::string i18n_pkgname = pkgname;
 682    if (arch.size() != 0)
 683       strprintf(i18n_pkgname, "%s (%s)", short_pkgname.c_str(), arch.c_str());
 684
 685    // 'processing' from dpkg looks like
 686    // 'processing: action: pkg'
 687    if(prefix == "processing")
 688    {
 689       const std::pair<const char *, const char *> * const iter =
 690         std::find_if(PackageProcessingOpsBegin,
 691                      PackageProcessingOpsEnd,
 692                      MatchProcessingOp(action.c_str()));
 693       if(iter == PackageProcessingOpsEnd)
 694       {
 695          if (Debug == true)
 696             std::clog << "ignoring unknown action: " << action << std::endl;
 697          return;
 698       }
 699       std::string msg;
 700       strprintf(msg, _(iter->second), i18n_pkgname.c_str());
 701       d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 702
 703       // FIXME: this needs a muliarch testcase
 704       // FIXME2: is "pkgname" here reliable with dpkg only sending us
 705       //         short pkgnames?
 706       if (action == "disappear")
 707          handleDisappearAction(pkgname);
 708       return;
 709    }
 710
 711    if (prefix == "status")
 712    {
 713       vector<struct DpkgState> const &states = PackageOps[pkg];
 714       if(PackageOpsDone[pkg] < states.size())
 715       {
 716          char const * const next_action = states[PackageOpsDone[pkg]].state;
 717          if (next_action && Debug == true)
 718             std::clog << "(parsed from dpkg) pkg: " << short_pkgname
 719                << " action: " << action << " (expected: '" << next_action << "' "
 720                << PackageOpsDone[pkg] << " of " << states.size() << ")" << endl;
 721
 722          // check if the package moved to the next dpkg state
 723          if(next_action && (action == next_action))
 724          {
 725             // only read the translation if there is actually a next action
 726             char const * const translation = _(states[PackageOpsDone[pkg]].str);
 727
 728             // we moved from one dpkg state to a new one, report that
 729             ++PackageOpsDone[pkg];
 730             ++PackagesDone;
 731
 732             std::string msg;
 733             strprintf(msg, translation, i18n_pkgname.c_str());
 734             d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 735          }
 736       }
 737    }
 738 }
 739                                                                         /*}}}*/
 740 // DPkgPM::handleDisappearAction                                        /*{{{*/
 741 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 742 {
 743    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 744    if (unlikely(Pkg.end() == true))
 745       return;
 746
 747    // record the package name for display and stuff later
 748    disappearedPkgs.insert(Pkg.FullName(true));
 749
 750    // the disappeared package was auto-installed - nothing to do
 751    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 752       return;
 753    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 754    if (unlikely(PkgVer.end() == true))
 755       return;
 756    /* search in the list of dependencies for (Pre)Depends,
 757       check if this dependency has a Replaces on our package
 758       and if so transfer the manual installed flag to it */
 759    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 760    {
 761       if (Dep->Type != pkgCache::Dep::Depends &&
 762           Dep->Type != pkgCache::Dep::PreDepends)
 763          continue;
 764       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 765       if (unlikely(Tar.end() == true))
 766          continue;
 767       // the package is already marked as manual
 768       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 769          continue;
 770       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 771       if (TarVer.end() == true)
 772          continue;
 773       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 774       {
 775          if (Rep->Type != pkgCache::Dep::Replaces)
 776             continue;
 777          if (Pkg != Rep.TargetPkg())
 778             continue;
 779          // okay, they are strongly connected - transfer manual-bit
 780          if (Debug == true)
 781             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 782          Cache[Tar].Flags &= ~Flag::Auto;
 783          break;
 784       }
 785    }
 786 }
 787                                                                         /*}}}*/
 788 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 789 // ---------------------------------------------------------------------
 790 /*
 791  */
 792 void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
 793 {
 794    char *p, *q;
 795    int len;
 796
 797    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 798    d->dpkgbuf_pos += len;
 799    if(len <= 0)
 800       return;
 801
 802    // process line by line if we have a buffer
 803    p = q = d->dpkgbuf;
 804    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 805    {
 806       *q = 0;
 807       ProcessDpkgStatusLine(p);
 808       p=q+1; // continue with next line
 809    }
 810
 811    // now move the unprocessed bits (after the final \n that is now a 0x0)
 812    // to the start and update d->dpkgbuf_pos
 813    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 814    if(p == NULL)
 815       return;
 816
 817    // we are interessted in the first char *after* 0x0
 818    p++;
 819
 820    // move the unprocessed tail to the start and update pos
 821    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 822    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 823 }
 824                                                                         /*}}}*/
 825 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 826 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 827 {
 828    size_t const length = value.length();
 829    if (length == 0)
 830       return;
 831    // poor mans rstrip(", ")
 832    if (value[length-2] == ',' && value[length-1] == ' ')
 833       value.erase(length - 2, 2);
 834    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 835 }                                                                       /*}}}*/
 836 // DPkgPM::OpenLog                                                      /*{{{*/
 837 bool pkgDPkgPM::OpenLog()
 838 {
 839    string const logdir = _config->FindDir("Dir::Log");
 840    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 841       // FIXME: use a better string after freeze
 842       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 843
 844    // get current time
 845    char timestr[200];
 846    time_t const t = time(NULL);
 847    struct tm const * const tmp = localtime(&t);
 848    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 849
 850    // open terminal log
 851    string const logfile_name = flCombine(logdir,
 852                                    _config->Find("Dir::Log::Terminal"));
 853    if (!logfile_name.empty())
 854    {
 855       d->term_out = fopen(logfile_name.c_str(),"a");
 856       if (d->term_out == NULL)
 857          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 858       setvbuf(d->term_out, NULL, _IONBF, 0);
 859       SetCloseExec(fileno(d->term_out), true);
 860       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 861       {
 862          struct passwd *pw = getpwnam("root");
 863          struct group *gr = getgrnam("adm");
 864          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 865             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 866       }
 867       if (chmod(logfile_name.c_str(), 0640) != 0)
 868          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 869       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 870    }
 871
 872    // write your history
 873    string const history_name = flCombine(logdir,
 874                                    _config->Find("Dir::Log::History"));
 875    if (!history_name.empty())
 876    {
 877       d->history_out = fopen(history_name.c_str(),"a");
 878       if (d->history_out == NULL)
 879          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 880       SetCloseExec(fileno(d->history_out), true);
 881       chmod(history_name.c_str(), 0644);
 882       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 883       string remove, purge, install, reinstall, upgrade, downgrade;
 884       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 885       {
 886          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 887          string *line = NULL;
 888          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 889          if (Cache[I].NewInstall() == true)
 890             HISTORYINFO(install, CANDIDATE_AUTO)
 891          else if (Cache[I].ReInstall() == true)
 892             HISTORYINFO(reinstall, CANDIDATE)
 893          else if (Cache[I].Upgrade() == true)
 894             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 895          else if (Cache[I].Downgrade() == true)
 896             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 897          else if (Cache[I].Delete() == true)
 898             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 899          else
 900             continue;
 901          #undef HISTORYINFO
 902          line->append(I.FullName(false)).append(" (");
 903          switch (infostring) {
 904          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 905          case CANDIDATE_AUTO:
 906             line->append(Cache[I].CandVersion);
 907             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 908                line->append(", automatic");
 909             break;
 910          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 911          case CURRENT: line->append(Cache[I].CurVersion); break;
 912          }
 913          line->append("), ");
 914       }
 915       if (_config->Exists("Commandline::AsString") == true)
 916          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 917       WriteHistoryTag("Install", install);
 918       WriteHistoryTag("Reinstall", reinstall);
 919       WriteHistoryTag("Upgrade", upgrade);
 920       WriteHistoryTag("Downgrade",downgrade);
 921       WriteHistoryTag("Remove",remove);
 922       WriteHistoryTag("Purge",purge);
 923       fflush(d->history_out);
 924    }
 925
 926    return true;
 927 }
 928                                                                         /*}}}*/
 929 // DPkg::CloseLog                                                       /*{{{*/
 930 bool pkgDPkgPM::CloseLog()
 931 {
 932    char timestr[200];
 933    time_t t = time(NULL);
 934    struct tm *tmp = localtime(&t);
 935    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 936
 937    if(d->term_out)
 938    {
 939       fprintf(d->term_out, "Log ended: ");
 940       fprintf(d->term_out, "%s", timestr);
 941       fprintf(d->term_out, "\n");
 942       fclose(d->term_out);
 943    }
 944    d->term_out = NULL;
 945
 946    if(d->history_out)
 947    {
 948       if (disappearedPkgs.empty() == false)
 949       {
 950          string disappear;
 951          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 952               d != disappearedPkgs.end(); ++d)
 953          {
 954             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 955             disappear.append(*d);
 956             if (P.end() == true)
 957                disappear.append(", ");
 958             else
 959                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 960          }
 961          WriteHistoryTag("Disappeared", disappear);
 962       }
 963       if (d->dpkg_error.empty() == false)
 964          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 965       fprintf(d->history_out, "End-Date: %s\n", timestr);
 966       fclose(d->history_out);
 967    }
 968    d->history_out = NULL;
 969
 970    return true;
 971 }
 972                                                                         /*}}}*/
 973                                                                         /*}}}*/
 974 /*{{{*/
 975 // This implements a racy version of pselect for those architectures
 976 // that don't have a working implementation.
 977 // FIXME: Probably can be removed on Lenny+1
 978 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 979    fd_set *exceptfds, const struct timespec *timeout,
 980    const sigset_t *sigmask)
 981 {
 982    sigset_t origmask;
 983    struct timeval tv;
 984    int retval;
 985
 986    tv.tv_sec = timeout->tv_sec;
 987    tv.tv_usec = timeout->tv_nsec/1000;
 988
 989    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 990    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 991    sigprocmask(SIG_SETMASK, &origmask, 0);
 992    return retval;
 993 }
 994                                                                         /*}}}*/
 995
 996 // DPkgPM::BuildPackagesProgressMap                                     /*{{{*/
 997 void pkgDPkgPM::BuildPackagesProgressMap()
 998 {
 999    // map the dpkg states to the operations that are performed
1000    // (this is sorted in the same way as Item::Ops)
1001    static const struct DpkgState DpkgStatesOpMap[][7] = {
1002       // Install operation
1003       {
1004          {"half-installed", N_("Preparing %s")},
1005          {"unpacked", N_("Unpacking %s") },
1006          {NULL, NULL}
1007       },
1008       // Configure operation
1009       {
1010          {"unpacked",N_("Preparing to configure %s") },
1011          {"half-configured", N_("Configuring %s") },
1012          { "installed", N_("Installed %s")},
1013          {NULL, NULL}
1014       },
1015       // Remove operation
1016       {
1017          {"half-configured", N_("Preparing for removal of %s")},
1018          {"half-installed", N_("Removing %s")},
1019          {"config-files",  N_("Removed %s")},
1020          {NULL, NULL}
1021       },
1022       // Purge operation
1023       {
1024          {"config-files", N_("Preparing to completely remove %s")},
1025          {"not-installed", N_("Completely removed %s")},
1026          {NULL, NULL}
1027       },
1028    };
1029
1030    // init the PackageOps map, go over the list of packages that
1031    // that will be [installed|configured|removed|purged] and add
1032    // them to the PackageOps map (the dpkg states it goes through)
1033    // and the PackageOpsTranslations (human readable strings)
1034    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1035    {
1036       if((*I).Pkg.end() == true)
1037          continue;
1038
1039       string const name = (*I).Pkg.FullName();
1040       PackageOpsDone[name] = 0;
1041       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1042       {
1043          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1044          PackagesTotal++;
1045       }
1046    }
1047 }
1048                                                                         /*}}}*/
1049 bool pkgDPkgPM::Go(int StatusFd)
1050 {
1051    APT::Progress::PackageManager *progress = NULL;
1052    if (StatusFd == -1)
1053       progress = APT::Progress::PackageManagerProgressFactory();
1054    else
1055       progress = new APT::Progress::PackageManagerProgressFd(StatusFd);
1056
1057    return Go(progress);
1058 }
1059
1060 void pkgDPkgPM::StartPtyMagic()
1061 {
1062    if (_config->FindB("Dpkg::Use-Pty", true) == false)
1063    {
1064       d->master = -1;
1065       if (d->slave != NULL)
1066          free(d->slave);
1067       d->slave = NULL;
1068       return;
1069    }
1070
1071    _error->PushToStack();
1072    // if tcgetattr for both stdin/stdout returns 0 (no error)
1073    // we do the pty magic
1074    if (tcgetattr(STDOUT_FILENO, &d->tt) == 0 &&
1075          tcgetattr(STDIN_FILENO, &d->tt) == 0)
1076    {
1077       d->master = posix_openpt(O_RDWR | O_NOCTTY);
1078       if (d->master == -1)
1079          _error->Errno("posix_openpt", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1080       else if (unlockpt(d->master) == -1)
1081       {
1082          _error->Errno("unlockpt", "Unlocking the slave of master fd %d failed!", d->master);
1083          close(d->master);
1084          d->master = -1;
1085       }
1086       else
1087       {
1088          char const * const slave_name = ptsname(d->master);
1089          if (slave_name == NULL)
1090          {
1091             _error->Errno("unlockpt", "Getting name for slave of master fd %d failed!", d->master);
1092             close(d->master);
1093             d->master = -1;
1094          }
1095          else
1096          {
1097             d->slave = strdup(slave_name);
1098             if (d->slave == NULL)
1099             {
1100                _error->Errno("strdup", "Copying name %s for slave of master fd %d failed!", slave_name, d->master);
1101                close(d->master);
1102                d->master = -1;
1103             }
1104             struct winsize win;
1105             if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) < 0)
1106                _error->Errno("ioctl", "Getting TIOCGWINSZ from stdout failed!");
1107             if (ioctl(d->master, TIOCSWINSZ, &win) < 0)
1108                _error->Errno("ioctl", "Setting TIOCSWINSZ for master fd %d failed!", d->master);
1109             if (tcsetattr(d->master, TCSANOW, &d->tt) == -1)
1110                _error->Errno("tcsetattr", "Setting in Start via TCSANOW for master fd %d failed!", d->master);
1111
1112             struct termios raw_tt;
1113             raw_tt = d->tt;
1114             cfmakeraw(&raw_tt);
1115             raw_tt.c_lflag &= ~ECHO;
1116             raw_tt.c_lflag |= ISIG;
1117             // block SIGTTOU during tcsetattr to prevent a hang if
1118             // the process is a member of the background process group
1119             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1120             sigemptyset(&d->sigmask);
1121             sigaddset(&d->sigmask, SIGTTOU);
1122             sigprocmask(SIG_BLOCK,&d->sigmask, &d->original_sigmask);
1123             if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw_tt) == -1)
1124                _error->Errno("tcsetattr", "Setting in Start via TCSAFLUSH for stdout failed!");
1125             sigprocmask(SIG_SETMASK, &d->original_sigmask, NULL);
1126          }
1127       }
1128    }
1129    else
1130    {
1131       // complain only if stdout is either a terminal (but still failed) or is an invalid
1132       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1133       if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1134          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1135    }
1136
1137    if (_error->PendingError() == true)
1138    {
1139       if (d->master != -1)
1140       {
1141          close(d->master);
1142          d->master = -1;
1143       }
1144       _error->DumpErrors(std::cerr);
1145    }
1146    _error->RevertToStack();
1147 }
1148 void pkgDPkgPM::SetupSlavePtyMagic()
1149 {
1150    if(d->master == -1)
1151       return;
1152
1153    if (close(d->master) == -1)
1154       _error->FatalE("close", "Closing master %d in child failed!", d->master);
1155    if (setsid() == -1)
1156       _error->FatalE("setsid", "Starting a new session for child failed!");
1157
1158    int const slaveFd = open(d->slave, O_RDWR);
1159    if (slaveFd == -1)
1160       _error->FatalE("open", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1161
1162    if (ioctl(slaveFd, TIOCSCTTY, 0) < 0)
1163       _error->FatalE("ioctl", "Setting TIOCSCTTY for slave fd %d failed!", slaveFd);
1164    else
1165    {
1166       for (unsigned short i = 0; i < 3; ++i)
1167          if (dup2(slaveFd, i) == -1)
1168             _error->FatalE("dup2", "Dupping %d to %d in child failed!", slaveFd, i);
1169
1170       if (tcsetattr(0, TCSANOW, &d->tt) < 0)
1171          _error->FatalE("tcsetattr", "Setting in Setup via TCSANOW for slave fd %d failed!", slaveFd);
1172    }
1173 }
1174 void pkgDPkgPM::StopPtyMagic()
1175 {
1176    if (d->slave != NULL)
1177       free(d->slave);
1178    d->slave = NULL;
1179    if(d->master >= 0)
1180    {
1181       if (tcsetattr(0, TCSAFLUSH, &d->tt) == -1)
1182          _error->FatalE("tcsetattr", "Setting in Stop via TCSAFLUSH for stdin failed!");
1183       close(d->master);
1184       d->master = -1;
1185    }
1186 }
1187
1188 // DPkgPM::Go - Run the sequence                                        /*{{{*/
1189 // ---------------------------------------------------------------------
1190 /* This globs the operations and calls dpkg
1191  *
1192  * If it is called with a progress object apt will report the install
1193  * progress to this object. It maps the dpkg states a package goes
1194  * through to human readable (and i10n-able)
1195  * names and calculates a percentage for each step.
1196  */
1197 bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
1198 {
1199    pkgPackageManager::SigINTStop = false;
1200    d->progress = progress;
1201
1202    // Generate the base argument list for dpkg
1203    unsigned long StartSize = 0;
1204    std::vector<const char *> Args;
1205    std::string DpkgExecutable = getDpkgExecutable();
1206    Args.push_back(DpkgExecutable.c_str());
1207    StartSize += DpkgExecutable.length();
1208
1209    // Stick in any custom dpkg options
1210    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
1211    if (Opts != 0)
1212    {
1213       Opts = Opts->Child;
1214       for (; Opts != 0; Opts = Opts->Next)
1215       {
1216          if (Opts->Value.empty() == true)
1217             continue;
1218          Args.push_back(Opts->Value.c_str());
1219          StartSize += Opts->Value.length();
1220       }
1221    }
1222
1223    size_t const BaseArgs = Args.size();
1224    // we need to detect if we can qualify packages with the architecture or not
1225    Args.push_back("--assert-multi-arch");
1226    Args.push_back(NULL);
1227
1228    pid_t dpkgAssertMultiArch = ExecFork();
1229    if (dpkgAssertMultiArch == 0)
1230    {
1231       dpkgChrootDirectory();
1232       // redirect everything to the ultimate sink as we only need the exit-status
1233       int const nullfd = open("/dev/null", O_RDONLY);
1234       dup2(nullfd, STDIN_FILENO);
1235       dup2(nullfd, STDOUT_FILENO);
1236       dup2(nullfd, STDERR_FILENO);
1237       execvp(Args[0], (char**) &Args[0]);
1238       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
1239       _exit(2);
1240    }
1241
1242    fd_set rfds;
1243    struct timespec tv;
1244
1245    // FIXME: do we really need this limit when we have MaxArgBytes?
1246    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",32*1024);
1247
1248    // try to figure out the max environment size
1249    int OSArgMax = sysconf(_SC_ARG_MAX);
1250    if(OSArgMax < 0)
1251       OSArgMax = 32*1024;
1252    OSArgMax -= EnvironmentSize() - 2*1024;
1253    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes", OSArgMax);
1254    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
1255
1256    if (RunScripts("DPkg::Pre-Invoke") == false)
1257       return false;
1258
1259    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
1260       return false;
1261
1262    // support subpressing of triggers processing for special
1263    // cases like d-i that runs the triggers handling manually
1264    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
1265    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
1266    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
1267       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
1268
1269    // for the progress
1270    BuildPackagesProgressMap();
1271
1272    d->stdin_is_dev_null = false;
1273
1274    // create log
1275    OpenLog();
1276
1277    bool dpkgMultiArch = false;
1278    if (dpkgAssertMultiArch > 0)
1279    {
1280       int Status = 0;
1281       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1282       {
1283          if (errno == EINTR)
1284             continue;
1285          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1286          break;
1287       }
1288       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1289          dpkgMultiArch = true;
1290    }
1291
1292    // start pty magic before the loop
1293    StartPtyMagic();
1294
1295    // Tell the progress that its starting and fork dpkg
1296    d->progress->Start(d->master);
1297
1298    // this loop is runs once per dpkg operation
1299    vector<Item>::const_iterator I = List.begin();
1300    while (I != List.end())
1301    {
1302       // Do all actions with the same Op in one run
1303       vector<Item>::const_iterator J = I;
1304       if (TriggersPending == true)
1305          for (; J != List.end(); ++J)
1306          {
1307             if (J->Op == I->Op)
1308                continue;
1309             if (J->Op != Item::TriggersPending)
1310                break;
1311             vector<Item>::const_iterator T = J + 1;
1312             if (T != List.end() && T->Op == I->Op)
1313                continue;
1314             break;
1315          }
1316       else
1317          for (; J != List.end() && J->Op == I->Op; ++J)
1318             /* nothing */;
1319
1320       // keep track of allocated strings for multiarch package names
1321       std::vector<char *> Packages;
1322
1323       // start with the baseset of arguments
1324       unsigned long Size = StartSize;
1325       Args.erase(Args.begin() + BaseArgs, Args.end());
1326
1327       // Now check if we are within the MaxArgs limit
1328       //
1329       // this code below is problematic, because it may happen that
1330       // the argument list is split in a way that A depends on B
1331       // and they are in the same "--configure A B" run
1332       // - with the split they may now be configured in different
1333       //   runs, using Immediate-Configure-All can help prevent this.
1334       if (J - I > (signed)MaxArgs)
1335       {
1336          J = I + MaxArgs;
1337          unsigned long const size = MaxArgs + 10;
1338          Args.reserve(size);
1339          Packages.reserve(size);
1340       }
1341       else
1342       {
1343          unsigned long const size = (J - I) + 10;
1344          Args.reserve(size);
1345          Packages.reserve(size);
1346       }
1347
1348       int fd[2];
1349       if (pipe(fd) != 0)
1350          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1351
1352 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1353 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1354
1355       ADDARGC("--status-fd");
1356       char status_fd_buf[20];
1357       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1358       ADDARG(status_fd_buf);
1359       unsigned long const Op = I->Op;
1360
1361       switch (I->Op)
1362       {
1363          case Item::Remove:
1364          ADDARGC("--force-depends");
1365          ADDARGC("--force-remove-essential");
1366          ADDARGC("--remove");
1367          break;
1368
1369          case Item::Purge:
1370          ADDARGC("--force-depends");
1371          ADDARGC("--force-remove-essential");
1372          ADDARGC("--purge");
1373          break;
1374
1375          case Item::Configure:
1376          ADDARGC("--configure");
1377          break;
1378
1379          case Item::ConfigurePending:
1380          ADDARGC("--configure");
1381          ADDARGC("--pending");
1382          break;
1383
1384          case Item::TriggersPending:
1385          ADDARGC("--triggers-only");
1386          ADDARGC("--pending");
1387          break;
1388
1389          case Item::Install:
1390          ADDARGC("--unpack");
1391          ADDARGC("--auto-deconfigure");
1392          break;
1393       }
1394
1395       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1396           I->Op != Item::ConfigurePending)
1397       {
1398          ADDARGC("--no-triggers");
1399       }
1400 #undef ADDARGC
1401
1402       // Write in the file or package names
1403       if (I->Op == Item::Install)
1404       {
1405          for (;I != J && Size < MaxArgBytes; ++I)
1406          {
1407             if (I->File[0] != '/')
1408                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1409             Args.push_back(I->File.c_str());
1410             Size += I->File.length();
1411          }
1412       }
1413       else
1414       {
1415          string const nativeArch = _config->Find("APT::Architecture");
1416          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1417          for (;I != J && Size < MaxArgBytes; ++I)
1418          {
1419             if((*I).Pkg.end() == true)
1420                continue;
1421             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.FullName(true)) != disappearedPkgs.end())
1422                continue;
1423             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1424             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1425                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1426                                            strcmp(I->Pkg.Arch(), "none") == 0))
1427             {
1428                char const * const name = I->Pkg.Name();
1429                ADDARG(name);
1430             }
1431             else
1432             {
1433                pkgCache::VerIterator PkgVer;
1434                std::string name = I->Pkg.Name();
1435                if (Op == Item::Remove || Op == Item::Purge)
1436                {
1437                   PkgVer = I->Pkg.CurrentVer();
1438                   if(PkgVer.end() == true)
1439                      PkgVer = FindNowVersion(I->Pkg);
1440                }
1441                else
1442                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1443                if (strcmp(I->Pkg.Arch(), "none") == 0)
1444                   ; // never arch-qualify a package without an arch
1445                else if (PkgVer.end() == false)
1446                   name.append(":").append(PkgVer.Arch());
1447                else
1448                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1449                char * const fullname = strdup(name.c_str());
1450                Packages.push_back(fullname);
1451                ADDARG(fullname);
1452             }
1453          }
1454          // skip configure action if all sheduled packages disappeared
1455          if (oldSize == Size)
1456             continue;
1457       }
1458 #undef ADDARG
1459
1460       J = I;
1461
1462       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1463       {
1464          for (std::vector<const char *>::const_iterator a = Args.begin();
1465               a != Args.end(); ++a)
1466             clog << *a << ' ';
1467          clog << endl;
1468          continue;
1469       }
1470       Args.push_back(NULL);
1471
1472       cout << flush;
1473       clog << flush;
1474       cerr << flush;
1475
1476       /* Mask off sig int/quit. We do this because dpkg also does when
1477          it forks scripts. What happens is that when you hit ctrl-c it sends
1478          it to all processes in the group. Since dpkg ignores the signal
1479          it doesn't die but we do! So we must also ignore it */
1480       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1481       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1482
1483       // Check here for any SIGINT
1484       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1485          break;
1486
1487
1488       // ignore SIGHUP as well (debian #463030)
1489       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1490
1491       // now run dpkg
1492       d->progress->StartDpkg();
1493       std::set<int> KeepFDs;
1494       KeepFDs.insert(fd[1]);
1495       MergeKeepFdsFromConfiguration(KeepFDs);
1496       pid_t Child = ExecFork(KeepFDs);
1497       if (Child == 0)
1498       {
1499          // This is the child
1500          SetupSlavePtyMagic();
1501          close(fd[0]); // close the read end of the pipe
1502
1503          dpkgChrootDirectory();
1504
1505          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1506             _exit(100);
1507
1508          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1509          {
1510             int Flags;
1511             int dummy = 0;
1512             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1513                _exit(100);
1514
1515             // Discard everything in stdin before forking dpkg
1516             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1517                _exit(100);
1518
1519             while (read(STDIN_FILENO,&dummy,1) == 1);
1520
1521             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1522                _exit(100);
1523          }
1524
1525          /* No Job Control Stop Env is a magic dpkg var that prevents it
1526             from using sigstop */
1527          putenv((char *)"DPKG_NO_TSTP=yes");
1528          execvp(Args[0], (char**) &Args[0]);
1529          cerr << "Could not exec dpkg!" << endl;
1530          _exit(100);
1531       }
1532
1533       // apply ionice
1534       if (_config->FindB("DPkg::UseIoNice", false) == true)
1535          ionice(Child);
1536
1537       // Wait for dpkg
1538       int Status = 0;
1539
1540       // we read from dpkg here
1541       int const _dpkgin = fd[0];
1542       close(fd[1]);                        // close the write end of the pipe
1543
1544       // setups fds
1545       sigemptyset(&d->sigmask);
1546       sigprocmask(SIG_BLOCK,&d->sigmask,&d->original_sigmask);
1547
1548       /* free vectors (and therefore memory) as we don't need the included data anymore */
1549       for (std::vector<char *>::const_iterator p = Packages.begin();
1550            p != Packages.end(); ++p)
1551          free(*p);
1552       Packages.clear();
1553
1554       // the result of the waitpid call
1555       int res;
1556       int select_ret;
1557       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1558          if(res < 0) {
1559             // FIXME: move this to a function or something, looks ugly here
1560             // error handling, waitpid returned -1
1561             if (errno == EINTR)
1562                continue;
1563             RunScripts("DPkg::Post-Invoke");
1564
1565             // Restore sig int/quit
1566             signal(SIGQUIT,old_SIGQUIT);
1567             signal(SIGINT,old_SIGINT);
1568
1569             signal(SIGHUP,old_SIGHUP);
1570             return _error->Errno("waitpid","Couldn't wait for subprocess");
1571          }
1572
1573          // wait for input or output here
1574          FD_ZERO(&rfds);
1575          if (d->master >= 0 && !d->stdin_is_dev_null)
1576             FD_SET(0, &rfds);
1577          FD_SET(_dpkgin, &rfds);
1578          if(d->master >= 0)
1579             FD_SET(d->master, &rfds);
1580          tv.tv_sec = 0;
1581          tv.tv_nsec = d->progress->GetPulseInterval();
1582          select_ret = pselect(max(d->master, _dpkgin)+1, &rfds, NULL, NULL,
1583                               &tv, &d->original_sigmask);
1584          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1585             select_ret = racy_pselect(max(d->master, _dpkgin)+1, &rfds, NULL,
1586                                       NULL, &tv, &d->original_sigmask);
1587          d->progress->Pulse();
1588          if (select_ret == 0)
1589             continue;
1590          else if (select_ret < 0 && errno == EINTR)
1591             continue;
1592          else if (select_ret < 0)
1593          {
1594             perror("select() returned error");
1595             continue;
1596          }
1597
1598          if(d->master >= 0 && FD_ISSET(d->master, &rfds))
1599             DoTerminalPty(d->master);
1600          if(d->master >= 0 && FD_ISSET(0, &rfds))
1601             DoStdin(d->master);
1602          if(FD_ISSET(_dpkgin, &rfds))
1603             DoDpkgStatusFd(_dpkgin);
1604       }
1605       close(_dpkgin);
1606
1607       // Restore sig int/quit
1608       signal(SIGQUIT,old_SIGQUIT);
1609       signal(SIGINT,old_SIGINT);
1610
1611       signal(SIGHUP,old_SIGHUP);
1612       // Check for an error code.
1613       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1614       {
1615          // if it was set to "keep-dpkg-runing" then we won't return
1616          // here but keep the loop going and just report it as a error
1617          // for later
1618          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1619
1620          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1621             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1622          else if (WIFEXITED(Status) != 0)
1623             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1624          else
1625             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1626          _error->Error("%s", d->dpkg_error.c_str());
1627
1628          if(stopOnError)
1629             break;
1630       }
1631    }
1632    // dpkg is done at this point
1633    d->progress->Stop();
1634    StopPtyMagic();
1635    CloseLog();
1636
1637    if (pkgPackageManager::SigINTStop)
1638        _error->Warning(_("Operation was interrupted before it could finish"));
1639
1640    if (RunScripts("DPkg::Post-Invoke") == false)
1641       return false;
1642
1643    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1644    {
1645       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1646       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1647           unlink(oldpkgcache.c_str()) == 0)
1648       {
1649          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1650          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1651          {
1652             _error->PushToStack();
1653             pkgCacheFile CacheFile;
1654             CacheFile.BuildCaches(NULL, true);
1655             _error->RevertToStack();
1656          }
1657       }
1658    }
1659
1660    Cache.writeStateFile(NULL);
1661    return d->dpkg_error.empty();
1662 }
1663
1664 void SigINT(int /*sig*/) {
1665    pkgPackageManager::SigINTStop = true;
1666 }
1667                                                                         /*}}}*/
1668 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1669 // ---------------------------------------------------------------------
1670 /* */
1671 void pkgDPkgPM::Reset()
1672 {
1673    List.erase(List.begin(),List.end());
1674 }
1675                                                                         /*}}}*/
1676 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1677 // ---------------------------------------------------------------------
1678 /* */
1679 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1680 {
1681    // If apport doesn't exist or isn't installed do nothing
1682    // This e.g. prevents messages in 'universes' without apport
1683    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1684    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1685       return;
1686
1687    string pkgname, reportfile, pkgver, arch;
1688    string::size_type pos;
1689    FILE *report;
1690
1691    if (_config->FindB("Dpkg::ApportFailureReport", true) == false)
1692    {
1693       std::clog << "configured to not write apport reports" << std::endl;
1694       return;
1695    }
1696
1697    // only report the first errors
1698    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1699    {
1700       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1701       return;
1702    }
1703
1704    // check if its not a follow up error
1705    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1706    if(strstr(errormsg, needle) != NULL) {
1707       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1708       return;
1709    }
1710
1711    // do not report disk-full failures
1712    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1713       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1714       return;
1715    }
1716
1717    // do not report out-of-memory failures
1718    if(strstr(errormsg, strerror(ENOMEM)) != NULL ||
1719       strstr(errormsg, "failed to allocate memory") != NULL) {
1720       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1721       return;
1722    }
1723
1724    // do not report bugs regarding inaccessible local files
1725    if(strstr(errormsg, strerror(ENOENT)) != NULL ||
1726       strstr(errormsg, "cannot access archive") != NULL) {
1727       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1728       return;
1729    }
1730
1731    // do not report errors encountered when decompressing packages
1732    if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) {
1733       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1734       return;
1735    }
1736
1737    // do not report dpkg I/O errors, this is a format string, so we compare
1738    // the prefix and the suffix of the error with the dpkg error message
1739    vector<string> io_errors;
1740    io_errors.push_back(string("failed to read"));
1741    io_errors.push_back(string("failed to write"));
1742    io_errors.push_back(string("failed to seek"));
1743    io_errors.push_back(string("unexpected end of file or stream"));
1744
1745    for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); ++I)
1746    {
1747       vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%');
1748       if (list.size() > 1) {
1749          // we need to split %s, VectorizeString only allows char so we need
1750          // to kill the "s" manually
1751          if (list[1].size() > 1) {
1752             list[1].erase(0, 1);
1753             if(strstr(errormsg, list[0].c_str()) &&
1754                strstr(errormsg, list[1].c_str())) {
1755                std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1756                return;
1757             }
1758          }
1759       }
1760    }
1761
1762    // get the pkgname and reportfile
1763    pkgname = flNotDir(pkgpath);
1764    pos = pkgname.find('_');
1765    if(pos != string::npos)
1766       pkgname = pkgname.substr(0, pos);
1767
1768    // find the package versin and source package name
1769    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1770    if (Pkg.end() == true)
1771       return;
1772    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1773    if (Ver.end() == true)
1774       return;
1775    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1776
1777    // if the file exists already, we check:
1778    // - if it was reported already (touched by apport).
1779    //   If not, we do nothing, otherwise
1780    //    we overwrite it. This is the same behaviour as apport
1781    // - if we have a report with the same pkgversion already
1782    //   then we skip it
1783    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1784    if(FileExists(reportfile))
1785    {
1786       struct stat buf;
1787       char strbuf[255];
1788
1789       // check atime/mtime
1790       stat(reportfile.c_str(), &buf);
1791       if(buf.st_mtime > buf.st_atime)
1792          return;
1793
1794       // check if the existing report is the same version
1795       report = fopen(reportfile.c_str(),"r");
1796       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1797       {
1798          if(strstr(strbuf,"Package:") == strbuf)
1799          {
1800             char pkgname[255], version[255];
1801             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1802                if(strcmp(pkgver.c_str(), version) == 0)
1803                {
1804                   fclose(report);
1805                   return;
1806                }
1807          }
1808       }
1809       fclose(report);
1810    }
1811
1812    // now write the report
1813    arch = _config->Find("APT::Architecture");
1814    report = fopen(reportfile.c_str(),"w");
1815    if(report == NULL)
1816       return;
1817    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1818       chmod(reportfile.c_str(), 0);
1819    else
1820       chmod(reportfile.c_str(), 0600);
1821    fprintf(report, "ProblemType: Package\n");
1822    fprintf(report, "Architecture: %s\n", arch.c_str());
1823    time_t now = time(NULL);
1824    fprintf(report, "Date: %s" , ctime(&now));
1825    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1826 #if APT_PKG_ABI >= 413
1827    fprintf(report, "SourcePackage: %s\n", Ver.SourcePkgName());
1828 #else
1829    pkgRecords Recs(Cache);
1830    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1831    std::string srcpkgname = Parse.SourcePkg();
1832    if(srcpkgname.empty())
1833       srcpkgname = pkgname;
1834    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1835 #endif
1836    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1837
1838    // ensure that the log is flushed
1839    if(d->term_out)
1840       fflush(d->term_out);
1841
1842    // attach terminal log it if we have it
1843    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1844    if (!logfile_name.empty())
1845    {
1846       FILE *log = NULL;
1847
1848       fprintf(report, "DpkgTerminalLog:\n");
1849       log = fopen(logfile_name.c_str(),"r");
1850       if(log != NULL)
1851       {
1852          char buf[1024];
1853          while( fgets(buf, sizeof(buf), log) != NULL)
1854             fprintf(report, " %s", buf);
1855          fprintf(report, " \n");
1856          fclose(log);
1857       }
1858    }
1859
1860    // attach history log it if we have it
1861    string histfile_name = _config->FindFile("Dir::Log::History");
1862    if (!histfile_name.empty())
1863    {
1864       fprintf(report, "DpkgHistoryLog:\n");
1865       FILE* log = fopen(histfile_name.c_str(),"r");
1866       if(log != NULL)
1867       {
1868          char buf[1024];
1869          while( fgets(buf, sizeof(buf), log) != NULL)
1870             fprintf(report, " %s", buf);
1871          fclose(log);
1872       }
1873    }
1874
1875    // log the ordering
1876    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1877    fprintf(report, "AptOrdering:\n");
1878    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1879       if ((*I).Pkg != NULL)
1880          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1881       else
1882          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1883
1884    // attach dmesg log (to learn about segfaults)
1885    if (FileExists("/bin/dmesg"))
1886    {
1887       fprintf(report, "Dmesg:\n");
1888       FILE *log = popen("/bin/dmesg","r");
1889       if(log != NULL)
1890       {
1891          char buf[1024];
1892          while( fgets(buf, sizeof(buf), log) != NULL)
1893             fprintf(report, " %s", buf);
1894          pclose(log);
1895       }
1896    }
1897
1898    // attach df -l log (to learn about filesystem status)
1899    if (FileExists("/bin/df"))
1900    {
1901
1902       fprintf(report, "Df:\n");
1903       FILE *log = popen("/bin/df -l","r");
1904       if(log != NULL)
1905       {
1906          char buf[1024];
1907          while( fgets(buf, sizeof(buf), log) != NULL)
1908             fprintf(report, " %s", buf);
1909          pclose(log);
1910       }
1911    }
1912
1913    fclose(report);
1914
1915 }
1916                                                                         /*}}}*/