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