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
  23 #include <unistd.h>
  24 #include <stdlib.h>
  25 #include <fcntl.h>
  26 #include <sys/select.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <sys/wait.h>
  30 #include <signal.h>
  31 #include <errno.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <algorithm>
  35 #include <sstream>
  36 #include <map>
  37 #include <pwd.h>
  38 #include <grp.h>
  39
  40 #include <termios.h>
  41 #include <unistd.h>
  42 #include <sys/ioctl.h>
  43 #include <pty.h>
  44
  45 #include <apti18n.h>
  46                                                                         /*}}}*/
  47
  48 using namespace std;
  49
  50 class pkgDPkgPMPrivate
  51 {
  52 public:
  53    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  54                         term_out(NULL), history_out(NULL)
  55    {
  56       dpkgbuf[0] = '\0';
  57    }
  58    bool stdin_is_dev_null;
  59    // the buffer we use for the dpkg status-fd reading
  60    char dpkgbuf[1024];
  61    int dpkgbuf_pos;
  62    FILE *term_out;
  63    FILE *history_out;
  64    string dpkg_error;
  65 };
  66
  67 namespace
  68 {
  69   // Maps the dpkg "processing" info to human readable names.  Entry 0
  70   // of each array is the key, entry 1 is the value.
  71   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  72     std::make_pair("install",   N_("Installing %s")),
  73     std::make_pair("configure", N_("Configuring %s")),
  74     std::make_pair("remove",    N_("Removing %s")),
  75     std::make_pair("purge",    N_("Completely removing %s")),
  76     std::make_pair("disappear", N_("Noting disappearance of %s")),
  77     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  78   };
  79
  80   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  81   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  82
  83   // Predicate to test whether an entry in the PackageProcessingOps
  84   // array matches a string.
  85   class MatchProcessingOp
  86   {
  87     const char *target;
  88
  89   public:
  90     MatchProcessingOp(const char *the_target)
  91       : target(the_target)
  92     {
  93     }
  94
  95     bool operator()(const std::pair<const char *, const char *> &pair) const
  96     {
  97       return strcmp(pair.first, target) == 0;
  98     }
  99   };
 100 }
 101
 102 /* helper function to ionice the given PID
 103
 104  there is no C header for ionice yet - just the syscall interface
 105  so we use the binary from util-linux
 106 */
 107 static bool
 108 ionice(int PID)
 109 {
 110    if (!FileExists("/usr/bin/ionice"))
 111       return false;
 112    pid_t Process = ExecFork();
 113    if (Process == 0)
 114    {
 115       char buf[32];
 116       snprintf(buf, sizeof(buf), "-p%d", PID);
 117       const char *Args[4];
 118       Args[0] = "/usr/bin/ionice";
 119       Args[1] = "-c3";
 120       Args[2] = buf;
 121       Args[3] = 0;
 122       execv(Args[0], (char **)Args);
 123    }
 124    return ExecWait(Process, "ionice");
 125 }
 126
 127 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 128 static void dpkgChrootDirectory()
 129 {
 130    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 131    if (chrootDir == "/")
 132       return;
 133    std::cerr << "Chrooting into " << chrootDir << std::endl;
 134    if (chroot(chrootDir.c_str()) != 0)
 135       _exit(100);
 136 }
 137                                                                         /*}}}*/
 138
 139
 140 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 141 // ---------------------------------------------------------------------
 142 /* This is helpful when a package is no longer installed but has residual
 143  * config files
 144  */
 145 static
 146 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 147 {
 148    pkgCache::VerIterator Ver;
 149    for (Ver = Pkg.VersionList(); Ver.end() == false; Ver++)
 150    {
 151       pkgCache::VerFileIterator Vf = Ver.FileList();
 152       pkgCache::PkgFileIterator F = Vf.File();
 153       for (F = Vf.File(); F.end() == false; F++)
 154       {
 155          if (F && F.Archive())
 156          {
 157             if (strcmp(F.Archive(), "now"))
 158                return Ver;
 159          }
 160       }
 161    }
 162    return Ver;
 163 }
 164                                                                         /*}}}*/
 165
 166 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 167 // ---------------------------------------------------------------------
 168 /* */
 169 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 170    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 171 {
 172    d = new pkgDPkgPMPrivate();
 173 }
 174                                                                         /*}}}*/
 175 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 176 // ---------------------------------------------------------------------
 177 /* */
 178 pkgDPkgPM::~pkgDPkgPM()
 179 {
 180    delete d;
 181 }
 182                                                                         /*}}}*/
 183 // DPkgPM::Install - Install a package                                  /*{{{*/
 184 // ---------------------------------------------------------------------
 185 /* Add an install operation to the sequence list */
 186 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 187 {
 188    if (File.empty() == true || Pkg.end() == true)
 189       return _error->Error("Internal Error, No file name for %s",Pkg.Name());
 190
 191    // If the filename string begins with DPkg::Chroot-Directory, return the
 192    // substr that is within the chroot so dpkg can access it.
 193    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 194    if (chrootdir != "/" && File.find(chrootdir) == 0)
 195    {
 196       size_t len = chrootdir.length();
 197       if (chrootdir.at(len - 1) == '/')
 198         len--;
 199       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 200    }
 201    else
 202       List.push_back(Item(Item::Install,Pkg,File));
 203
 204    return true;
 205 }
 206                                                                         /*}}}*/
 207 // DPkgPM::Configure - Configure a package                              /*{{{*/
 208 // ---------------------------------------------------------------------
 209 /* Add a configure operation to the sequence list */
 210 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 211 {
 212    if (Pkg.end() == true)
 213       return false;
 214
 215    List.push_back(Item(Item::Configure, Pkg));
 216
 217    // Use triggers for config calls if we configure "smart"
 218    // as otherwise Pre-Depends will not be satisfied, see #526774
 219    if (_config->FindB("DPkg::TriggersPending", false) == true)
 220       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 221
 222    return true;
 223 }
 224                                                                         /*}}}*/
 225 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 226 // ---------------------------------------------------------------------
 227 /* Add a remove operation to the sequence list */
 228 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 229 {
 230    if (Pkg.end() == true)
 231       return false;
 232
 233    if (Purge == true)
 234       List.push_back(Item(Item::Purge,Pkg));
 235    else
 236       List.push_back(Item(Item::Remove,Pkg));
 237    return true;
 238 }
 239                                                                         /*}}}*/
 240 // DPkgPM::SendV2Pkgs - Send version 2 package info                     /*{{{*/
 241 // ---------------------------------------------------------------------
 242 /* This is part of the helper script communication interface, it sends
 243    very complete information down to the other end of the pipe.*/
 244 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 245 {
 246    fprintf(F,"VERSION 2\n");
 247
 248    /* Write out all of the configuration directives by walking the
 249       configuration tree */
 250    const Configuration::Item *Top = _config->Tree(0);
 251    for (; Top != 0;)
 252    {
 253       if (Top->Value.empty() == false)
 254       {
 255          fprintf(F,"%s=%s\n",
 256                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 257                  QuoteString(Top->Value,"\n").c_str());
 258       }
 259
 260       if (Top->Child != 0)
 261       {
 262          Top = Top->Child;
 263          continue;
 264       }
 265
 266       while (Top != 0 && Top->Next == 0)
 267          Top = Top->Parent;
 268       if (Top != 0)
 269          Top = Top->Next;
 270    }
 271    fprintf(F,"\n");
 272
 273    // Write out the package actions in order.
 274    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 275    {
 276       if(I->Pkg.end() == true)
 277          continue;
 278
 279       pkgDepCache::StateCache &S = Cache[I->Pkg];
 280
 281       fprintf(F,"%s ",I->Pkg.Name());
 282       // Current version
 283       if (I->Pkg->CurrentVer == 0)
 284          fprintf(F,"- ");
 285       else
 286          fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
 287
 288       // Show the compare operator
 289       // Target version
 290       if (S.InstallVer != 0)
 291       {
 292          int Comp = 2;
 293          if (I->Pkg->CurrentVer != 0)
 294             Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
 295          if (Comp < 0)
 296             fprintf(F,"> ");
 297          if (Comp == 0)
 298             fprintf(F,"= ");
 299          if (Comp > 0)
 300             fprintf(F,"< ");
 301          fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
 302       }
 303       else
 304          fprintf(F,"> - ");
 305
 306       // Show the filename/operation
 307       if (I->Op == Item::Install)
 308       {
 309          // No errors here..
 310          if (I->File[0] != '/')
 311             fprintf(F,"**ERROR**\n");
 312          else
 313             fprintf(F,"%s\n",I->File.c_str());
 314       }
 315       if (I->Op == Item::Configure)
 316          fprintf(F,"**CONFIGURE**\n");
 317       if (I->Op == Item::Remove ||
 318           I->Op == Item::Purge)
 319          fprintf(F,"**REMOVE**\n");
 320
 321       if (ferror(F) != 0)
 322          return false;
 323    }
 324    return true;
 325 }
 326                                                                         /*}}}*/
 327 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 328 // ---------------------------------------------------------------------
 329 /* This looks for a list of scripts to run from the configuration file
 330    each one is run and is fed on standard input a list of all .deb files
 331    that are due to be installed. */
 332 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 333 {
 334    Configuration::Item const *Opts = _config->Tree(Cnf);
 335    if (Opts == 0 || Opts->Child == 0)
 336       return true;
 337    Opts = Opts->Child;
 338
 339    unsigned int Count = 1;
 340    for (; Opts != 0; Opts = Opts->Next, Count++)
 341    {
 342       if (Opts->Value.empty() == true)
 343          continue;
 344
 345       // Determine the protocol version
 346       string OptSec = Opts->Value;
 347       string::size_type Pos;
 348       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 349          Pos = OptSec.length();
 350       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 351
 352       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 353
 354       // Create the pipes
 355       int Pipes[2];
 356       if (pipe(Pipes) != 0)
 357          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 358       SetCloseExec(Pipes[0],true);
 359       SetCloseExec(Pipes[1],true);
 360
 361       // Purified Fork for running the script
 362       pid_t Process = ExecFork();
 363       if (Process == 0)
 364       {
 365          // Setup the FDs
 366          dup2(Pipes[0],STDIN_FILENO);
 367          SetCloseExec(STDOUT_FILENO,false);
 368          SetCloseExec(STDIN_FILENO,false);
 369          SetCloseExec(STDERR_FILENO,false);
 370
 371          dpkgChrootDirectory();
 372          const char *Args[4];
 373          Args[0] = "/bin/sh";
 374          Args[1] = "-c";
 375          Args[2] = Opts->Value.c_str();
 376          Args[3] = 0;
 377          execv(Args[0],(char **)Args);
 378          _exit(100);
 379       }
 380       close(Pipes[0]);
 381       FILE *F = fdopen(Pipes[1],"w");
 382       if (F == 0)
 383          return _error->Errno("fdopen","Faild to open new FD");
 384
 385       // Feed it the filenames.
 386       if (Version <= 1)
 387       {
 388          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 389          {
 390             // Only deal with packages to be installed from .deb
 391             if (I->Op != Item::Install)
 392                continue;
 393
 394             // No errors here..
 395             if (I->File[0] != '/')
 396                continue;
 397
 398             /* Feed the filename of each package that is pending install
 399                into the pipe. */
 400             fprintf(F,"%s\n",I->File.c_str());
 401             if (ferror(F) != 0)
 402                break;
 403          }
 404       }
 405       else
 406          SendV2Pkgs(F);
 407
 408       fclose(F);
 409
 410       // Clean up the sub process
 411       if (ExecWait(Process,Opts->Value.c_str()) == false)
 412          return _error->Error("Failure running script %s",Opts->Value.c_str());
 413    }
 414
 415    return true;
 416 }
 417                                                                         /*}}}*/
 418 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 419 // ---------------------------------------------------------------------
 420 /*
 421 */
 422 void pkgDPkgPM::DoStdin(int master)
 423 {
 424    unsigned char input_buf[256] = {0,};
 425    ssize_t len = read(0, input_buf, sizeof(input_buf));
 426    if (len)
 427       write(master, input_buf, len);
 428    else
 429       d->stdin_is_dev_null = true;
 430 }
 431                                                                         /*}}}*/
 432 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 433 // ---------------------------------------------------------------------
 434 /*
 435  * read the terminal pty and write log
 436  */
 437 void pkgDPkgPM::DoTerminalPty(int master)
 438 {
 439    unsigned char term_buf[1024] = {0,0, };
 440
 441    ssize_t len=read(master, term_buf, sizeof(term_buf));
 442    if(len == -1 && errno == EIO)
 443    {
 444       // this happens when the child is about to exit, we
 445       // give it time to actually exit, otherwise we run
 446       // into a race so we sleep for half a second.
 447       struct timespec sleepfor = { 0, 500000000 };
 448       nanosleep(&sleepfor, NULL);
 449       return;
 450    }
 451    if(len <= 0)
 452       return;
 453    write(1, term_buf, len);
 454    if(d->term_out)
 455       fwrite(term_buf, len, sizeof(char), d->term_out);
 456 }
 457                                                                         /*}}}*/
 458 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 459 // ---------------------------------------------------------------------
 460 /*
 461  */
 462 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 463 {
 464    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 465    // the status we output
 466    ostringstream status;
 467
 468    if (Debug == true)
 469       std::clog << "got from dpkg '" << line << "'" << std::endl;
 470
 471
 472    /* dpkg sends strings like this:
 473       'status:   <pkg>:  <pkg  qstate>'
 474       errors look like this:
 475       '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
 476       and conffile-prompt like this
 477       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 478
 479       Newer versions of dpkg sent also:
 480       'processing: install: pkg'
 481       'processing: configure: pkg'
 482       'processing: remove: pkg'
 483       'processing: purge: pkg'
 484       'processing: disappear: pkg'
 485       'processing: trigproc: trigger'
 486
 487    */
 488    char* list[6];
 489    //        dpkg sends multiline error messages sometimes (see
 490    //        #374195 for a example. we should support this by
 491    //        either patching dpkg to not send multiline over the
 492    //        statusfd or by rewriting the code here to deal with
 493    //        it. for now we just ignore it and not crash
 494    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 495    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 496    {
 497       if (Debug == true)
 498          std::clog << "ignoring line: not enough ':'" << std::endl;
 499       return;
 500    }
 501    const char* const pkg = list[1];
 502    const char* action = _strstrip(list[2]);
 503
 504    // 'processing' from dpkg looks like
 505    // 'processing: action: pkg'
 506    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 507    {
 508       char s[200];
 509       const char* const pkg_or_trigger = _strstrip(list[2]);
 510       action = _strstrip( list[1]);
 511       const std::pair<const char *, const char *> * const iter =
 512         std::find_if(PackageProcessingOpsBegin,
 513                      PackageProcessingOpsEnd,
 514                      MatchProcessingOp(action));
 515       if(iter == PackageProcessingOpsEnd)
 516       {
 517          if (Debug == true)
 518             std::clog << "ignoring unknown action: " << action << std::endl;
 519          return;
 520       }
 521       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 522
 523       status << "pmstatus:" << pkg_or_trigger
 524              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 525              << ":" << s
 526              << endl;
 527       if(OutStatusFd > 0)
 528          write(OutStatusFd, status.str().c_str(), status.str().size());
 529       if (Debug == true)
 530          std::clog << "send: '" << status.str() << "'" << endl;
 531
 532       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 533          handleDisappearAction(pkg_or_trigger);
 534       return;
 535    }
 536
 537    if(strncmp(action,"error",strlen("error")) == 0)
 538    {
 539       // urgs, sometime has ":" in its error string so that we
 540       // end up with the error message split between list[3]
 541       // and list[4], e.g. the message:
 542       // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 543       // concat them again
 544       if( list[4] != NULL )
 545          list[3][strlen(list[3])] = ':';
 546
 547       status << "pmerror:" << list[1]
 548              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 549              << ":" << list[3]
 550              << endl;
 551       if(OutStatusFd > 0)
 552          write(OutStatusFd, status.str().c_str(), status.str().size());
 553       if (Debug == true)
 554          std::clog << "send: '" << status.str() << "'" << endl;
 555       pkgFailures++;
 556       WriteApportReport(list[1], list[3]);
 557       return;
 558    }
 559    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 560    {
 561       status << "pmconffile:" << list[1]
 562              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 563              << ":" << list[3]
 564              << endl;
 565       if(OutStatusFd > 0)
 566          write(OutStatusFd, status.str().c_str(), status.str().size());
 567       if (Debug == true)
 568          std::clog << "send: '" << status.str() << "'" << endl;
 569       return;
 570    }
 571
 572    vector<struct DpkgState> const &states = PackageOps[pkg];
 573    const char *next_action = NULL;
 574    if(PackageOpsDone[pkg] < states.size())
 575       next_action = states[PackageOpsDone[pkg]].state;
 576    // check if the package moved to the next dpkg state
 577    if(next_action && (strcmp(action, next_action) == 0))
 578    {
 579       // only read the translation if there is actually a next
 580       // action
 581       const char *translation = _(states[PackageOpsDone[pkg]].str);
 582       char s[200];
 583       snprintf(s, sizeof(s), translation, pkg);
 584
 585       // we moved from one dpkg state to a new one, report that
 586       PackageOpsDone[pkg]++;
 587       PackagesDone++;
 588       // build the status str
 589       status << "pmstatus:" << pkg
 590              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 591              << ":" << s
 592              << endl;
 593       if(OutStatusFd > 0)
 594          write(OutStatusFd, status.str().c_str(), status.str().size());
 595       if (Debug == true)
 596          std::clog << "send: '" << status.str() << "'" << endl;
 597    }
 598    if (Debug == true)
 599       std::clog << "(parsed from dpkg) pkg: " << pkg
 600                 << " action: " << action << endl;
 601 }
 602                                                                         /*}}}*/
 603 // DPkgPM::handleDisappearAction                                        /*{{{*/
 604 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 605 {
 606    // record the package name for display and stuff later
 607    disappearedPkgs.insert(pkgname);
 608
 609    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 610    if (unlikely(Pkg.end() == true))
 611       return;
 612    // the disappeared package was auto-installed - nothing to do
 613    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 614       return;
 615    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 616    if (unlikely(PkgVer.end() == true))
 617       return;
 618    /* search in the list of dependencies for (Pre)Depends,
 619       check if this dependency has a Replaces on our package
 620       and if so transfer the manual installed flag to it */
 621    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 622    {
 623       if (Dep->Type != pkgCache::Dep::Depends &&
 624           Dep->Type != pkgCache::Dep::PreDepends)
 625          continue;
 626       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 627       if (unlikely(Tar.end() == true))
 628          continue;
 629       // the package is already marked as manual
 630       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 631          continue;
 632       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 633       if (TarVer.end() == true)
 634          continue;
 635       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 636       {
 637          if (Rep->Type != pkgCache::Dep::Replaces)
 638             continue;
 639          if (Pkg != Rep.TargetPkg())
 640             continue;
 641          // okay, they are strongly connected - transfer manual-bit
 642          if (Debug == true)
 643             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 644          Cache[Tar].Flags &= ~Flag::Auto;
 645          break;
 646       }
 647    }
 648 }
 649                                                                         /*}}}*/
 650 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 651 // ---------------------------------------------------------------------
 652 /*
 653  */
 654 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 655 {
 656    char *p, *q;
 657    int len;
 658
 659    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 660    d->dpkgbuf_pos += len;
 661    if(len <= 0)
 662       return;
 663
 664    // process line by line if we have a buffer
 665    p = q = d->dpkgbuf;
 666    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 667    {
 668       *q = 0;
 669       ProcessDpkgStatusLine(OutStatusFd, p);
 670       p=q+1; // continue with next line
 671    }
 672
 673    // now move the unprocessed bits (after the final \n that is now a 0x0)
 674    // to the start and update d->dpkgbuf_pos
 675    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 676    if(p == NULL)
 677       return;
 678
 679    // we are interessted in the first char *after* 0x0
 680    p++;
 681
 682    // move the unprocessed tail to the start and update pos
 683    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 684    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 685 }
 686                                                                         /*}}}*/
 687 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 688 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 689 {
 690    size_t const length = value.length();
 691    if (length == 0)
 692       return;
 693    // poor mans rstrip(", ")
 694    if (value[length-2] == ',' && value[length-1] == ' ')
 695       value.erase(length - 2, 2);
 696    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 697 }                                                                       /*}}}*/
 698 // DPkgPM::OpenLog                                                      /*{{{*/
 699 bool pkgDPkgPM::OpenLog()
 700 {
 701    string const logdir = _config->FindDir("Dir::Log");
 702    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 703       // FIXME: use a better string after freeze
 704       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 705
 706    // get current time
 707    char timestr[200];
 708    time_t const t = time(NULL);
 709    struct tm const * const tmp = localtime(&t);
 710    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 711
 712    // open terminal log
 713    string const logfile_name = flCombine(logdir,
 714                                    _config->Find("Dir::Log::Terminal"));
 715    if (!logfile_name.empty())
 716    {
 717       d->term_out = fopen(logfile_name.c_str(),"a");
 718       if (d->term_out == NULL)
 719          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 720       setvbuf(d->term_out, NULL, _IONBF, 0);
 721       SetCloseExec(fileno(d->term_out), true);
 722       struct passwd *pw;
 723       struct group *gr;
 724       pw = getpwnam("root");
 725       gr = getgrnam("adm");
 726       if (pw != NULL && gr != NULL)
 727           chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid);
 728       chmod(logfile_name.c_str(), 0644);
 729       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 730    }
 731
 732    // write your history
 733    string const history_name = flCombine(logdir,
 734                                    _config->Find("Dir::Log::History"));
 735    if (!history_name.empty())
 736    {
 737       d->history_out = fopen(history_name.c_str(),"a");
 738       if (d->history_out == NULL)
 739          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 740       SetCloseExec(fileno(d->history_out), true);
 741       chmod(history_name.c_str(), 0644);
 742       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 743       string remove, purge, install, reinstall, upgrade, downgrade;
 744       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 745       {
 746          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 747          string *line = NULL;
 748          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 749          if (Cache[I].NewInstall() == true)
 750             HISTORYINFO(install, CANDIDATE_AUTO)
 751          else if (Cache[I].ReInstall() == true)
 752             HISTORYINFO(reinstall, CANDIDATE)
 753          else if (Cache[I].Upgrade() == true)
 754             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 755          else if (Cache[I].Downgrade() == true)
 756             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 757          else if (Cache[I].Delete() == true)
 758             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 759          else
 760             continue;
 761          #undef HISTORYINFO
 762          line->append(I.FullName(false)).append(" (");
 763          switch (infostring) {
 764          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 765          case CANDIDATE_AUTO:
 766             line->append(Cache[I].CandVersion);
 767             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 768                line->append(", automatic");
 769             break;
 770          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 771          case CURRENT: line->append(Cache[I].CurVersion); break;
 772          }
 773          line->append("), ");
 774       }
 775       if (_config->Exists("Commandline::AsString") == true)
 776          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 777       WriteHistoryTag("Install", install);
 778       WriteHistoryTag("Reinstall", reinstall);
 779       WriteHistoryTag("Upgrade", upgrade);
 780       WriteHistoryTag("Downgrade",downgrade);
 781       WriteHistoryTag("Remove",remove);
 782       WriteHistoryTag("Purge",purge);
 783       fflush(d->history_out);
 784    }
 785
 786    return true;
 787 }
 788                                                                         /*}}}*/
 789 // DPkg::CloseLog                                                       /*{{{*/
 790 bool pkgDPkgPM::CloseLog()
 791 {
 792    char timestr[200];
 793    time_t t = time(NULL);
 794    struct tm *tmp = localtime(&t);
 795    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 796
 797    if(d->term_out)
 798    {
 799       fprintf(d->term_out, "Log ended: ");
 800       fprintf(d->term_out, "%s", timestr);
 801       fprintf(d->term_out, "\n");
 802       fclose(d->term_out);
 803    }
 804    d->term_out = NULL;
 805
 806    if(d->history_out)
 807    {
 808       if (disappearedPkgs.empty() == false)
 809       {
 810          string disappear;
 811          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 812               d != disappearedPkgs.end(); ++d)
 813          {
 814             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 815             disappear.append(*d);
 816             if (P.end() == true)
 817                disappear.append(", ");
 818             else
 819                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 820          }
 821          WriteHistoryTag("Disappeared", disappear);
 822       }
 823       if (d->dpkg_error.empty() == false)
 824          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 825       fprintf(d->history_out, "End-Date: %s\n", timestr);
 826       fclose(d->history_out);
 827    }
 828    d->history_out = NULL;
 829
 830    return true;
 831 }
 832                                                                         /*}}}*/
 833 /*{{{*/
 834 // This implements a racy version of pselect for those architectures
 835 // that don't have a working implementation.
 836 // FIXME: Probably can be removed on Lenny+1
 837 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 838    fd_set *exceptfds, const struct timespec *timeout,
 839    const sigset_t *sigmask)
 840 {
 841    sigset_t origmask;
 842    struct timeval tv;
 843    int retval;
 844
 845    tv.tv_sec = timeout->tv_sec;
 846    tv.tv_usec = timeout->tv_nsec/1000;
 847
 848    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 849    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 850    sigprocmask(SIG_SETMASK, &origmask, 0);
 851    return retval;
 852 }
 853 /*}}}*/
 854 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 855 // ---------------------------------------------------------------------
 856 /* This globs the operations and calls dpkg
 857  *
 858  * If it is called with "OutStatusFd" set to a valid file descriptor
 859  * apt will report the install progress over this fd. It maps the
 860  * dpkg states a package goes through to human readable (and i10n-able)
 861  * names and calculates a percentage for each step.
 862 */
 863 bool pkgDPkgPM::Go(int OutStatusFd)
 864 {
 865    // Generate the base argument list for dpkg
 866    std::vector<const char *> Args;
 867    unsigned long StartSize = 0;
 868    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 869    {
 870       string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 871       size_t dpkgChrootLen = dpkgChrootDir.length();
 872       if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 873       {
 874          if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 875             --dpkgChrootLen;
 876          Tmp = Tmp.substr(dpkgChrootLen);
 877       }
 878    }
 879    Args.push_back(Tmp.c_str());
 880    StartSize += Tmp.length();
 881
 882    // Stick in any custom dpkg options
 883    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 884    if (Opts != 0)
 885    {
 886       Opts = Opts->Child;
 887       for (; Opts != 0; Opts = Opts->Next)
 888       {
 889          if (Opts->Value.empty() == true)
 890             continue;
 891          Args.push_back(Opts->Value.c_str());
 892          StartSize += Opts->Value.length();
 893       }
 894    }
 895
 896    size_t const BaseArgs = Args.size();
 897    // we need to detect if we can qualify packages with the architecture or not
 898    Args.push_back("--assert-multi-arch");
 899    Args.push_back(NULL);
 900
 901    pid_t dpkgAssertMultiArch = ExecFork();
 902    if (dpkgAssertMultiArch == 0)
 903    {
 904       dpkgChrootDirectory();
 905       // redirect everything to the ultimate sink as we only need the exit-status
 906       int const nullfd = open("/dev/null", O_RDONLY);
 907       dup2(nullfd, STDIN_FILENO);
 908       dup2(nullfd, STDOUT_FILENO);
 909       dup2(nullfd, STDERR_FILENO);
 910       execv(Args[0], (char**) &Args[0]);
 911       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
 912       _exit(2);
 913    }
 914
 915    fd_set rfds;
 916    struct timespec tv;
 917    sigset_t sigmask;
 918    sigset_t original_sigmask;
 919
 920    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 921    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 922    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 923
 924    if (RunScripts("DPkg::Pre-Invoke") == false)
 925       return false;
 926
 927    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 928       return false;
 929
 930    // support subpressing of triggers processing for special
 931    // cases like d-i that runs the triggers handling manually
 932    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 933    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 934    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 935       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 936
 937    // map the dpkg states to the operations that are performed
 938    // (this is sorted in the same way as Item::Ops)
 939    static const struct DpkgState DpkgStatesOpMap[][7] = {
 940       // Install operation
 941       {
 942          {"half-installed", N_("Preparing %s")},
 943          {"unpacked", N_("Unpacking %s") },
 944          {NULL, NULL}
 945       },
 946       // Configure operation
 947       {
 948          {"unpacked",N_("Preparing to configure %s") },
 949          {"half-configured", N_("Configuring %s") },
 950          { "installed", N_("Installed %s")},
 951          {NULL, NULL}
 952       },
 953       // Remove operation
 954       {
 955          {"half-configured", N_("Preparing for removal of %s")},
 956          {"half-installed", N_("Removing %s")},
 957          {"config-files",  N_("Removed %s")},
 958          {NULL, NULL}
 959       },
 960       // Purge operation
 961       {
 962          {"config-files", N_("Preparing to completely remove %s")},
 963          {"not-installed", N_("Completely removed %s")},
 964          {NULL, NULL}
 965       },
 966    };
 967
 968    // init the PackageOps map, go over the list of packages that
 969    // that will be [installed|configured|removed|purged] and add
 970    // them to the PackageOps map (the dpkg states it goes through)
 971    // and the PackageOpsTranslations (human readable strings)
 972    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
 973    {
 974       if((*I).Pkg.end() == true)
 975          continue;
 976
 977       string const name = (*I).Pkg.Name();
 978       PackageOpsDone[name] = 0;
 979       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
 980       {
 981          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 982          PackagesTotal++;
 983       }
 984    }
 985
 986    d->stdin_is_dev_null = false;
 987
 988    // create log
 989    OpenLog();
 990
 991    bool dpkgMultiArch = false;
 992    if (dpkgAssertMultiArch > 0)
 993    {
 994       int Status = 0;
 995       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
 996       {
 997          if (errno == EINTR)
 998             continue;
 999          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1000          break;
1001       }
1002       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1003          dpkgMultiArch = true;
1004    }
1005
1006    // this loop is runs once per operation
1007    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
1008    {
1009       // Do all actions with the same Op in one run
1010       vector<Item>::const_iterator J = I;
1011       if (TriggersPending == true)
1012          for (; J != List.end(); ++J)
1013          {
1014             if (J->Op == I->Op)
1015                continue;
1016             if (J->Op != Item::TriggersPending)
1017                break;
1018             vector<Item>::const_iterator T = J + 1;
1019             if (T != List.end() && T->Op == I->Op)
1020                continue;
1021             break;
1022          }
1023       else
1024          for (; J != List.end() && J->Op == I->Op; ++J)
1025             /* nothing */;
1026
1027       // keep track of allocated strings for multiarch package names
1028       std::vector<char *> Packages;
1029
1030       // start with the baseset of arguments
1031       unsigned long Size = StartSize;
1032       Args.erase(Args.begin() + BaseArgs, Args.end());
1033
1034       // Now check if we are within the MaxArgs limit
1035       //
1036       // this code below is problematic, because it may happen that
1037       // the argument list is split in a way that A depends on B
1038       // and they are in the same "--configure A B" run
1039       // - with the split they may now be configured in different
1040       //   runs, using Immediate-Configure-All can help prevent this.
1041       if (J - I > (signed)MaxArgs)
1042       {
1043          J = I + MaxArgs;
1044          unsigned long const size = MaxArgs + 10;
1045          Args.reserve(size);
1046          Packages.reserve(size);
1047       }
1048       else
1049       {
1050          unsigned long const size = (J - I) + 10;
1051          Args.reserve(size);
1052          Packages.reserve(size);
1053       }
1054
1055       int fd[2];
1056       pipe(fd);
1057
1058 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1059 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1060
1061       ADDARGC("--status-fd");
1062       char status_fd_buf[20];
1063       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1064       ADDARG(status_fd_buf);
1065       unsigned long const Op = I->Op;
1066
1067       switch (I->Op)
1068       {
1069          case Item::Remove:
1070          ADDARGC("--force-depends");
1071          ADDARGC("--force-remove-essential");
1072          ADDARGC("--remove");
1073          break;
1074
1075          case Item::Purge:
1076          ADDARGC("--force-depends");
1077          ADDARGC("--force-remove-essential");
1078          ADDARGC("--purge");
1079          break;
1080
1081          case Item::Configure:
1082          ADDARGC("--configure");
1083          break;
1084
1085          case Item::ConfigurePending:
1086          ADDARGC("--configure");
1087          ADDARGC("--pending");
1088          break;
1089
1090          case Item::TriggersPending:
1091          ADDARGC("--triggers-only");
1092          ADDARGC("--pending");
1093          break;
1094
1095          case Item::Install:
1096          ADDARGC("--unpack");
1097          ADDARGC("--auto-deconfigure");
1098          break;
1099       }
1100
1101       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1102           I->Op != Item::ConfigurePending)
1103       {
1104          ADDARGC("--no-triggers");
1105       }
1106 #undef ADDARGC
1107
1108       // Write in the file or package names
1109       if (I->Op == Item::Install)
1110       {
1111          for (;I != J && Size < MaxArgBytes; ++I)
1112          {
1113             if (I->File[0] != '/')
1114                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1115             Args.push_back(I->File.c_str());
1116             Size += I->File.length();
1117          }
1118       }
1119       else
1120       {
1121          string const nativeArch = _config->Find("APT::Architecture");
1122          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1123          for (;I != J && Size < MaxArgBytes; ++I)
1124          {
1125             if((*I).Pkg.end() == true)
1126                continue;
1127             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1128                continue;
1129             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1130             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch || !strcmp(I->Pkg.Arch(), "all")))
1131             {
1132                char const * const name = I->Pkg.Name();
1133                ADDARG(name);
1134             }
1135             else
1136             {
1137                pkgCache::VerIterator PkgVer;
1138                std::string name = I->Pkg.Name();
1139                if (Op == Item::Remove || Op == Item::Purge)
1140                {
1141                   PkgVer = I->Pkg.CurrentVer();
1142                   if(PkgVer.end() == true)
1143                      PkgVer = FindNowVersion(I->Pkg);
1144                }
1145                else
1146                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1147                if (PkgVer.end() == false)
1148                   name.append(":").append(PkgVer.Arch());
1149                else
1150                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1151                char * const fullname = strdup(name.c_str());
1152                Packages.push_back(fullname);
1153                ADDARG(fullname);
1154             }
1155          }
1156          // skip configure action if all sheduled packages disappeared
1157          if (oldSize == Size)
1158             continue;
1159       }
1160 #undef ADDARG
1161
1162       J = I;
1163
1164       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1165       {
1166          for (std::vector<const char *>::const_iterator a = Args.begin();
1167               a != Args.end(); ++a)
1168             clog << *a << ' ';
1169          clog << endl;
1170          continue;
1171       }
1172       Args.push_back(NULL);
1173
1174       cout << flush;
1175       clog << flush;
1176       cerr << flush;
1177
1178       /* Mask off sig int/quit. We do this because dpkg also does when
1179          it forks scripts. What happens is that when you hit ctrl-c it sends
1180          it to all processes in the group. Since dpkg ignores the signal
1181          it doesn't die but we do! So we must also ignore it */
1182       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1183       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1184
1185       // Check here for any SIGINT
1186       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1187          break;
1188
1189
1190       // ignore SIGHUP as well (debian #463030)
1191       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1192
1193       struct    termios tt;
1194       struct    winsize win;
1195       int       master = -1;
1196       int       slave = -1;
1197
1198       // if tcgetattr does not return zero there was a error
1199       // and we do not do any pty magic
1200       if (tcgetattr(0, &tt) == 0)
1201       {
1202          ioctl(0, TIOCGWINSZ, (char *)&win);
1203          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1204          {
1205             const char *s = _("Can not write log, openpty() "
1206                               "failed (/dev/pts not mounted?)\n");
1207             fprintf(stderr, "%s",s);
1208             if(d->term_out)
1209               fprintf(d->term_out, "%s",s);
1210             master = slave = -1;
1211          }  else {
1212             struct termios rtt;
1213             rtt = tt;
1214             cfmakeraw(&rtt);
1215             rtt.c_lflag &= ~ECHO;
1216             rtt.c_lflag |= ISIG;
1217             // block SIGTTOU during tcsetattr to prevent a hang if
1218             // the process is a member of the background process group
1219             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1220             sigemptyset(&sigmask);
1221             sigaddset(&sigmask, SIGTTOU);
1222             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1223             tcsetattr(0, TCSAFLUSH, &rtt);
1224             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1225          }
1226       }
1227        // Fork dpkg
1228       pid_t Child;
1229       _config->Set("APT::Keep-Fds::",fd[1]);
1230       // send status information that we are about to fork dpkg
1231       if(OutStatusFd > 0) {
1232          ostringstream status;
1233          status << "pmstatus:dpkg-exec:"
1234                 << (PackagesDone/float(PackagesTotal)*100.0)
1235                 << ":" << _("Running dpkg")
1236                 << endl;
1237          write(OutStatusFd, status.str().c_str(), status.str().size());
1238       }
1239       Child = ExecFork();
1240
1241       // This is the child
1242       if (Child == 0)
1243       {
1244          if(slave >= 0 && master >= 0)
1245          {
1246             setsid();
1247             ioctl(slave, TIOCSCTTY, 0);
1248             close(master);
1249             dup2(slave, 0);
1250             dup2(slave, 1);
1251             dup2(slave, 2);
1252             close(slave);
1253          }
1254          close(fd[0]); // close the read end of the pipe
1255
1256          dpkgChrootDirectory();
1257
1258          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1259             _exit(100);
1260
1261          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1262          {
1263             int Flags,dummy;
1264             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1265                _exit(100);
1266
1267             // Discard everything in stdin before forking dpkg
1268             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1269                _exit(100);
1270
1271             while (read(STDIN_FILENO,&dummy,1) == 1);
1272
1273             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1274                _exit(100);
1275          }
1276
1277          /* No Job Control Stop Env is a magic dpkg var that prevents it
1278             from using sigstop */
1279          putenv((char *)"DPKG_NO_TSTP=yes");
1280          execvp(Args[0], (char**) &Args[0]);
1281          cerr << "Could not exec dpkg!" << endl;
1282          _exit(100);
1283       }
1284
1285       // apply ionice
1286       if (_config->FindB("DPkg::UseIoNice", false) == true)
1287          ionice(Child);
1288
1289       // clear the Keep-Fd again
1290       _config->Clear("APT::Keep-Fds",fd[1]);
1291
1292       // Wait for dpkg
1293       int Status = 0;
1294
1295       // we read from dpkg here
1296       int const _dpkgin = fd[0];
1297       close(fd[1]);                        // close the write end of the pipe
1298
1299       if(slave > 0)
1300          close(slave);
1301
1302       // setups fds
1303       sigemptyset(&sigmask);
1304       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1305
1306       /* free vectors (and therefore memory) as we don't need the included data anymore */
1307       for (std::vector<char *>::const_iterator p = Packages.begin();
1308            p != Packages.end(); ++p)
1309          free(*p);
1310       Packages.clear();
1311
1312       // the result of the waitpid call
1313       int res;
1314       int select_ret;
1315       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1316          if(res < 0) {
1317             // FIXME: move this to a function or something, looks ugly here
1318             // error handling, waitpid returned -1
1319             if (errno == EINTR)
1320                continue;
1321             RunScripts("DPkg::Post-Invoke");
1322
1323             // Restore sig int/quit
1324             signal(SIGQUIT,old_SIGQUIT);
1325             signal(SIGINT,old_SIGINT);
1326
1327             signal(SIGHUP,old_SIGHUP);
1328             return _error->Errno("waitpid","Couldn't wait for subprocess");
1329          }
1330
1331          // wait for input or output here
1332          FD_ZERO(&rfds);
1333          if (master >= 0 && !d->stdin_is_dev_null)
1334             FD_SET(0, &rfds);
1335          FD_SET(_dpkgin, &rfds);
1336          if(master >= 0)
1337             FD_SET(master, &rfds);
1338          tv.tv_sec = 1;
1339          tv.tv_nsec = 0;
1340          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1341                               &tv, &original_sigmask);
1342          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1343             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1344                                       NULL, &tv, &original_sigmask);
1345          if (select_ret == 0)
1346             continue;
1347          else if (select_ret < 0 && errno == EINTR)
1348             continue;
1349          else if (select_ret < 0)
1350          {
1351             perror("select() returned error");
1352             continue;
1353          }
1354
1355          if(master >= 0 && FD_ISSET(master, &rfds))
1356             DoTerminalPty(master);
1357          if(master >= 0 && FD_ISSET(0, &rfds))
1358             DoStdin(master);
1359          if(FD_ISSET(_dpkgin, &rfds))
1360             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1361       }
1362       close(_dpkgin);
1363
1364       // Restore sig int/quit
1365       signal(SIGQUIT,old_SIGQUIT);
1366       signal(SIGINT,old_SIGINT);
1367
1368       signal(SIGHUP,old_SIGHUP);
1369
1370       if(master >= 0)
1371       {
1372          tcsetattr(0, TCSAFLUSH, &tt);
1373          close(master);
1374       }
1375
1376       // Check for an error code.
1377       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1378       {
1379          // if it was set to "keep-dpkg-runing" then we won't return
1380          // here but keep the loop going and just report it as a error
1381          // for later
1382          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1383
1384          if(stopOnError)
1385             RunScripts("DPkg::Post-Invoke");
1386
1387          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1388             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1389          else if (WIFEXITED(Status) != 0)
1390             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1391          else
1392             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1393
1394          if(d->dpkg_error.size() > 0)
1395             _error->Error("%s", d->dpkg_error.c_str());
1396
1397          if(stopOnError)
1398          {
1399             CloseLog();
1400             return false;
1401          }
1402       }
1403    }
1404    CloseLog();
1405
1406    if (pkgPackageManager::SigINTStop)
1407        _error->Warning(_("Operation was interrupted before it could finish"));
1408
1409    if (RunScripts("DPkg::Post-Invoke") == false)
1410       return false;
1411
1412    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1413    {
1414       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1415       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1416           unlink(oldpkgcache.c_str()) == 0)
1417       {
1418          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1419          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1420          {
1421             _error->PushToStack();
1422             pkgCacheFile CacheFile;
1423             CacheFile.BuildCaches(NULL, true);
1424             _error->RevertToStack();
1425          }
1426       }
1427    }
1428
1429    Cache.writeStateFile(NULL);
1430    return true;
1431 }
1432
1433 void SigINT(int sig) {
1434    if (_config->FindB("APT::Immediate-Configure-All",false))
1435       pkgPackageManager::SigINTStop = true;
1436 }
1437                                                                         /*}}}*/
1438 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1439 // ---------------------------------------------------------------------
1440 /* */
1441 void pkgDPkgPM::Reset()
1442 {
1443    List.erase(List.begin(),List.end());
1444 }
1445                                                                         /*}}}*/
1446 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1447 // ---------------------------------------------------------------------
1448 /* */
1449 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1450 {
1451    string pkgname, reportfile, srcpkgname, pkgver, arch;
1452    string::size_type pos;
1453    FILE *report;
1454
1455    if (_config->FindB("Dpkg::ApportFailureReport", true) == false)
1456    {
1457       std::clog << "configured to not write apport reports" << std::endl;
1458       return;
1459    }
1460
1461    // only report the first errors
1462    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1463    {
1464       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1465       return;
1466    }
1467
1468    // check if its not a follow up error
1469    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1470    if(strstr(errormsg, needle) != NULL) {
1471       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1472       return;
1473    }
1474
1475    // do not report disk-full failures
1476    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1477       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1478       return;
1479    }
1480
1481    // do not report out-of-memory failures
1482    if(strstr(errormsg, strerror(ENOMEM)) != NULL ||
1483       strstr(errormsg, "failed to allocate memory") != NULL) {
1484       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1485       return;
1486    }
1487
1488    // do not report bugs regarding inaccessible local files
1489    if(strstr(errormsg, strerror(ENOENT)) != NULL ||
1490       strstr(errormsg, "cannot access archive") != NULL) {
1491       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1492       return;
1493    }
1494
1495    // do not report errors encountered when decompressing packages
1496    if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) {
1497       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1498       return;
1499    }
1500
1501    // do not report dpkg I/O errors, this is a format string, so we compare
1502    // the prefix and the suffix of the error with the dpkg error message
1503    vector<string> io_errors;
1504    io_errors.push_back(string("failed to read on buffer copy for %s"));
1505    io_errors.push_back(string("failed in write on buffer copy for %s"));
1506    io_errors.push_back(string("short read on buffer copy for %s"));
1507
1508    for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); I++)
1509    {
1510       vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%');
1511       if (list.size() > 1) {
1512          // we need to split %s, VectorizeString only allows char so we need
1513          // to kill the "s" manually
1514          if (list[1].size() > 1) {
1515             list[1].erase(0, 1);
1516             if(strstr(errormsg, list[0].c_str()) &&
1517                strstr(errormsg, list[1].c_str())) {
1518                std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1519                return;
1520             }
1521          }
1522       }
1523    }
1524
1525    // get the pkgname and reportfile
1526    pkgname = flNotDir(pkgpath);
1527    pos = pkgname.find('_');
1528    if(pos != string::npos)
1529       pkgname = pkgname.substr(0, pos);
1530
1531    // find the package versin and source package name
1532    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1533    if (Pkg.end() == true)
1534       return;
1535    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1536    if (Ver.end() == true)
1537       return;
1538    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1539    pkgRecords Recs(Cache);
1540    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1541    srcpkgname = Parse.SourcePkg();
1542    if(srcpkgname.empty())
1543       srcpkgname = pkgname;
1544
1545    // if the file exists already, we check:
1546    // - if it was reported already (touched by apport).
1547    //   If not, we do nothing, otherwise
1548    //    we overwrite it. This is the same behaviour as apport
1549    // - if we have a report with the same pkgversion already
1550    //   then we skip it
1551    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1552    if(FileExists(reportfile))
1553    {
1554       struct stat buf;
1555       char strbuf[255];
1556
1557       // check atime/mtime
1558       stat(reportfile.c_str(), &buf);
1559       if(buf.st_mtime > buf.st_atime)
1560          return;
1561
1562       // check if the existing report is the same version
1563       report = fopen(reportfile.c_str(),"r");
1564       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1565       {
1566          if(strstr(strbuf,"Package:") == strbuf)
1567          {
1568             char pkgname[255], version[255];
1569             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
1570                if(strcmp(pkgver.c_str(), version) == 0)
1571                {
1572                   fclose(report);
1573                   return;
1574                }
1575          }
1576       }
1577       fclose(report);
1578    }
1579
1580    // now write the report
1581    arch = _config->Find("APT::Architecture");
1582    report = fopen(reportfile.c_str(),"w");
1583    if(report == NULL)
1584       return;
1585    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1586       chmod(reportfile.c_str(), 0);
1587    else
1588       chmod(reportfile.c_str(), 0600);
1589    fprintf(report, "ProblemType: Package\n");
1590    fprintf(report, "Architecture: %s\n", arch.c_str());
1591    time_t now = time(NULL);
1592    fprintf(report, "Date: %s" , ctime(&now));
1593    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1594    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1595    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1596
1597    // ensure that the log is flushed
1598    if(d->term_out)
1599       fflush(d->term_out);
1600
1601    // attach terminal log it if we have it
1602    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1603    if (!logfile_name.empty())
1604    {
1605       FILE *log = NULL;
1606       char buf[1024];
1607
1608       fprintf(report, "DpkgTerminalLog:\n");
1609       log = fopen(logfile_name.c_str(),"r");
1610       if(log != NULL)
1611       {
1612          while( fgets(buf, sizeof(buf), log) != NULL)
1613             fprintf(report, " %s", buf);
1614          fprintf(report, " \n");
1615          fclose(log);
1616       }
1617    }
1618
1619    // attach history log it if we have it
1620    string histfile_name = _config->FindFile("Dir::Log::History");
1621    if (!histfile_name.empty())
1622    {
1623       FILE *log = NULL;
1624       char buf[1024];
1625
1626       fprintf(report, "DpkgHistoryLog:\n");
1627       log = fopen(histfile_name.c_str(),"r");
1628       if(log != NULL)
1629       {
1630          while( fgets(buf, sizeof(buf), log) != NULL)
1631             fprintf(report, " %s", buf);
1632          fclose(log);
1633       }
1634    }
1635
1636    // log the ordering
1637    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1638    fprintf(report, "AptOrdering:\n");
1639    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1640       fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1641
1642    // attach dmesg log (to learn about segfaults)
1643    if (FileExists("/bin/dmesg"))
1644    {
1645       FILE *log = NULL;
1646       char buf[1024];
1647
1648       fprintf(report, "Dmesg:\n");
1649       log = popen("/bin/dmesg","r");
1650       if(log != NULL)
1651       {
1652          while( fgets(buf, sizeof(buf), log) != NULL)
1653             fprintf(report, " %s", buf);
1654          pclose(log);
1655       }
1656    }
1657
1658    // attach df -l log (to learn about filesystem status)
1659    if (FileExists("/bin/df"))
1660    {
1661       FILE *log = NULL;
1662       char buf[1024];
1663
1664       fprintf(report, "Df:\n");
1665       log = popen("/bin/df -l","r");
1666       if(log != NULL)
1667       {
1668          while( fgets(buf, sizeof(buf), log) != NULL)
1669             fprintf(report, " %s", buf);
1670          pclose(log);
1671       }
1672    }
1673
1674    fclose(report);
1675
1676 }
1677                                                                         /*}}}*/