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       // redirect everything to the ultimate sink as we only need the exit-status
 861       int const nullfd = open("/dev/null", O_RDONLY);
 862       dup2(nullfd, STDIN_FILENO);
 863       dup2(nullfd, STDOUT_FILENO);
 864       dup2(nullfd, STDERR_FILENO);
 865       execv(Args[0], (char**) &Args[0]);
 866       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
 867       _exit(2);
 868    }
 869
 870    fd_set rfds;
 871    struct timespec tv;
 872    sigset_t sigmask;
 873    sigset_t original_sigmask;
 874
 875    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 876    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 877    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 878
 879    if (RunScripts("DPkg::Pre-Invoke") == false)
 880       return false;
 881
 882    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 883       return false;
 884
 885    // support subpressing of triggers processing for special
 886    // cases like d-i that runs the triggers handling manually
 887    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 888    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 889    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 890       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 891
 892    // map the dpkg states to the operations that are performed
 893    // (this is sorted in the same way as Item::Ops)
 894    static const struct DpkgState DpkgStatesOpMap[][7] = {
 895       // Install operation
 896       {
 897          {"half-installed", N_("Preparing %s")},
 898          {"unpacked", N_("Unpacking %s") },
 899          {NULL, NULL}
 900       },
 901       // Configure operation
 902       {
 903          {"unpacked",N_("Preparing to configure %s") },
 904          {"half-configured", N_("Configuring %s") },
 905          { "installed", N_("Installed %s")},
 906          {NULL, NULL}
 907       },
 908       // Remove operation
 909       {
 910          {"half-configured", N_("Preparing for removal of %s")},
 911          {"half-installed", N_("Removing %s")},
 912          {"config-files",  N_("Removed %s")},
 913          {NULL, NULL}
 914       },
 915       // Purge operation
 916       {
 917          {"config-files", N_("Preparing to completely remove %s")},
 918          {"not-installed", N_("Completely removed %s")},
 919          {NULL, NULL}
 920       },
 921    };
 922
 923    // init the PackageOps map, go over the list of packages that
 924    // that will be [installed|configured|removed|purged] and add
 925    // them to the PackageOps map (the dpkg states it goes through)
 926    // and the PackageOpsTranslations (human readable strings)
 927    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
 928    {
 929       if((*I).Pkg.end() == true)
 930          continue;
 931
 932       string const name = (*I).Pkg.Name();
 933       PackageOpsDone[name] = 0;
 934       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
 935       {
 936          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 937          PackagesTotal++;
 938       }
 939    }
 940
 941    d->stdin_is_dev_null = false;
 942
 943    // create log
 944    OpenLog();
 945
 946    bool dpkgMultiArch = false;
 947    if (dpkgAssertMultiArch > 0)
 948    {
 949       int Status = 0;
 950       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
 951       {
 952          if (errno == EINTR)
 953             continue;
 954          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
 955          break;
 956       }
 957       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
 958          dpkgMultiArch = true;
 959    }
 960
 961    // this loop is runs once per operation
 962    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
 963    {
 964       // Do all actions with the same Op in one run
 965       vector<Item>::const_iterator J = I;
 966       if (TriggersPending == true)
 967          for (; J != List.end(); ++J)
 968          {
 969             if (J->Op == I->Op)
 970                continue;
 971             if (J->Op != Item::TriggersPending)
 972                break;
 973             vector<Item>::const_iterator T = J + 1;
 974             if (T != List.end() && T->Op == I->Op)
 975                continue;
 976             break;
 977          }
 978       else
 979          for (; J != List.end() && J->Op == I->Op; ++J)
 980             /* nothing */;
 981
 982       // keep track of allocated strings for multiarch package names
 983       std::vector<char *> Packages;
 984
 985       // start with the baseset of arguments
 986       unsigned long Size = StartSize;
 987       Args.erase(Args.begin() + BaseArgs, Args.end());
 988
 989       // Now check if we are within the MaxArgs limit
 990       //
 991       // this code below is problematic, because it may happen that
 992       // the argument list is split in a way that A depends on B
 993       // and they are in the same "--configure A B" run
 994       // - with the split they may now be configured in different
 995       //   runs, using Immediate-Configure-All can help prevent this.
 996       if (J - I > (signed)MaxArgs)
 997       {
 998          J = I + MaxArgs;
 999          unsigned long const size = MaxArgs + 10;
1000          Args.reserve(size);
1001          Packages.reserve(size);
1002       }
1003       else
1004       {
1005          unsigned long const size = (J - I) + 10;
1006          Args.reserve(size);
1007          Packages.reserve(size);
1008       }
1009
1010       int fd[2];
1011       pipe(fd);
1012
1013 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1014 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1015
1016       ADDARGC("--status-fd");
1017       char status_fd_buf[20];
1018       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1019       ADDARG(status_fd_buf);
1020       unsigned long const Op = I->Op;
1021
1022       switch (I->Op)
1023       {
1024          case Item::Remove:
1025          ADDARGC("--force-depends");
1026          ADDARGC("--force-remove-essential");
1027          ADDARGC("--remove");
1028          break;
1029
1030          case Item::Purge:
1031          ADDARGC("--force-depends");
1032          ADDARGC("--force-remove-essential");
1033          ADDARGC("--purge");
1034          break;
1035
1036          case Item::Configure:
1037          ADDARGC("--configure");
1038          break;
1039
1040          case Item::ConfigurePending:
1041          ADDARGC("--configure");
1042          ADDARGC("--pending");
1043          break;
1044
1045          case Item::TriggersPending:
1046          ADDARGC("--triggers-only");
1047          ADDARGC("--pending");
1048          break;
1049
1050          case Item::Install:
1051          ADDARGC("--unpack");
1052          ADDARGC("--auto-deconfigure");
1053          break;
1054       }
1055
1056       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1057           I->Op != Item::ConfigurePending)
1058       {
1059          ADDARGC("--no-triggers");
1060       }
1061 #undef ADDARGC
1062
1063       // Write in the file or package names
1064       if (I->Op == Item::Install)
1065       {
1066          for (;I != J && Size < MaxArgBytes; ++I)
1067          {
1068             if (I->File[0] != '/')
1069                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1070             Args.push_back(I->File.c_str());
1071             Size += I->File.length();
1072          }
1073       }
1074       else
1075       {
1076          string const nativeArch = _config->Find("APT::Architecture");
1077          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1078          for (;I != J && Size < MaxArgBytes; ++I)
1079          {
1080             if((*I).Pkg.end() == true)
1081                continue;
1082             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1083                continue;
1084             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1085             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch || !strcmp(I->Pkg.Arch(), "all")))
1086             {
1087                char const * const name = I->Pkg.Name();
1088                ADDARG(name);
1089             }
1090             else
1091             {
1092                pkgCache::VerIterator PkgVer;
1093                std::string name = I->Pkg.Name();
1094                if (Op == Item::Remove || Op == Item::Purge)
1095                   PkgVer = I->Pkg.CurrentVer();
1096                else
1097                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1098                name.append(":").append(PkgVer.Arch());
1099                char * const fullname = strdup(name.c_str());
1100                Packages.push_back(fullname);
1101                ADDARG(fullname);
1102             }
1103          }
1104          // skip configure action if all sheduled packages disappeared
1105          if (oldSize == Size)
1106             continue;
1107       }
1108 #undef ADDARG
1109
1110       J = I;
1111
1112       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1113       {
1114          for (std::vector<const char *>::const_iterator a = Args.begin();
1115               a != Args.end(); ++a)
1116             clog << *a << ' ';
1117          clog << endl;
1118          continue;
1119       }
1120       Args.push_back(NULL);
1121
1122       cout << flush;
1123       clog << flush;
1124       cerr << flush;
1125
1126       /* Mask off sig int/quit. We do this because dpkg also does when
1127          it forks scripts. What happens is that when you hit ctrl-c it sends
1128          it to all processes in the group. Since dpkg ignores the signal
1129          it doesn't die but we do! So we must also ignore it */
1130       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1131       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1132
1133       // Check here for any SIGINT
1134       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1135          break;
1136
1137
1138       // ignore SIGHUP as well (debian #463030)
1139       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1140
1141       struct    termios tt;
1142       struct    winsize win;
1143       int       master = -1;
1144       int       slave = -1;
1145
1146       // if tcgetattr does not return zero there was a error
1147       // and we do not do any pty magic
1148       if (tcgetattr(0, &tt) == 0)
1149       {
1150          ioctl(0, TIOCGWINSZ, (char *)&win);
1151          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1152          {
1153             const char *s = _("Can not write log, openpty() "
1154                               "failed (/dev/pts not mounted?)\n");
1155             fprintf(stderr, "%s",s);
1156             if(d->term_out)
1157               fprintf(d->term_out, "%s",s);
1158             master = slave = -1;
1159          }  else {
1160             struct termios rtt;
1161             rtt = tt;
1162             cfmakeraw(&rtt);
1163             rtt.c_lflag &= ~ECHO;
1164             rtt.c_lflag |= ISIG;
1165             // block SIGTTOU during tcsetattr to prevent a hang if
1166             // the process is a member of the background process group
1167             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1168             sigemptyset(&sigmask);
1169             sigaddset(&sigmask, SIGTTOU);
1170             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1171             tcsetattr(0, TCSAFLUSH, &rtt);
1172             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1173          }
1174       }
1175        // Fork dpkg
1176       pid_t Child;
1177       _config->Set("APT::Keep-Fds::",fd[1]);
1178       // send status information that we are about to fork dpkg
1179       if(OutStatusFd > 0) {
1180          ostringstream status;
1181          status << "pmstatus:dpkg-exec:"
1182                 << (PackagesDone/float(PackagesTotal)*100.0)
1183                 << ":" << _("Running dpkg")
1184                 << endl;
1185          write(OutStatusFd, status.str().c_str(), status.str().size());
1186       }
1187       Child = ExecFork();
1188
1189       // This is the child
1190       if (Child == 0)
1191       {
1192          if(slave >= 0 && master >= 0)
1193          {
1194             setsid();
1195             ioctl(slave, TIOCSCTTY, 0);
1196             close(master);
1197             dup2(slave, 0);
1198             dup2(slave, 1);
1199             dup2(slave, 2);
1200             close(slave);
1201          }
1202          close(fd[0]); // close the read end of the pipe
1203
1204          if (_config->FindDir("DPkg::Chroot-Directory","/") != "/")
1205          {
1206             std::cerr << "Chrooting into "
1207                       << _config->FindDir("DPkg::Chroot-Directory")
1208                       << std::endl;
1209             if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0)
1210                _exit(100);
1211          }
1212
1213          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1214             _exit(100);
1215
1216          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1217          {
1218             int Flags,dummy;
1219             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1220                _exit(100);
1221
1222             // Discard everything in stdin before forking dpkg
1223             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1224                _exit(100);
1225
1226             while (read(STDIN_FILENO,&dummy,1) == 1);
1227
1228             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1229                _exit(100);
1230          }
1231
1232          /* No Job Control Stop Env is a magic dpkg var that prevents it
1233             from using sigstop */
1234          putenv((char *)"DPKG_NO_TSTP=yes");
1235          execvp(Args[0], (char**) &Args[0]);
1236          cerr << "Could not exec dpkg!" << endl;
1237          _exit(100);
1238       }
1239
1240       // apply ionice
1241       if (_config->FindB("DPkg::UseIoNice", false) == true)
1242          ionice(Child);
1243
1244       // clear the Keep-Fd again
1245       _config->Clear("APT::Keep-Fds",fd[1]);
1246
1247       // Wait for dpkg
1248       int Status = 0;
1249
1250       // we read from dpkg here
1251       int const _dpkgin = fd[0];
1252       close(fd[1]);                        // close the write end of the pipe
1253
1254       if(slave > 0)
1255          close(slave);
1256
1257       // setups fds
1258       sigemptyset(&sigmask);
1259       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1260
1261       /* free vectors (and therefore memory) as we don't need the included data anymore */
1262       for (std::vector<char *>::const_iterator p = Packages.begin();
1263            p != Packages.end(); ++p)
1264          free(*p);
1265       Packages.clear();
1266
1267       // the result of the waitpid call
1268       int res;
1269       int select_ret;
1270       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1271          if(res < 0) {
1272             // FIXME: move this to a function or something, looks ugly here
1273             // error handling, waitpid returned -1
1274             if (errno == EINTR)
1275                continue;
1276             RunScripts("DPkg::Post-Invoke");
1277
1278             // Restore sig int/quit
1279             signal(SIGQUIT,old_SIGQUIT);
1280             signal(SIGINT,old_SIGINT);
1281
1282             signal(SIGHUP,old_SIGHUP);
1283             return _error->Errno("waitpid","Couldn't wait for subprocess");
1284          }
1285
1286          // wait for input or output here
1287          FD_ZERO(&rfds);
1288          if (master >= 0 && !d->stdin_is_dev_null)
1289             FD_SET(0, &rfds);
1290          FD_SET(_dpkgin, &rfds);
1291          if(master >= 0)
1292             FD_SET(master, &rfds);
1293          tv.tv_sec = 1;
1294          tv.tv_nsec = 0;
1295          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1296                               &tv, &original_sigmask);
1297          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1298             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1299                                       NULL, &tv, &original_sigmask);
1300          if (select_ret == 0)
1301             continue;
1302          else if (select_ret < 0 && errno == EINTR)
1303             continue;
1304          else if (select_ret < 0)
1305          {
1306             perror("select() returned error");
1307             continue;
1308          }
1309
1310          if(master >= 0 && FD_ISSET(master, &rfds))
1311             DoTerminalPty(master);
1312          if(master >= 0 && FD_ISSET(0, &rfds))
1313             DoStdin(master);
1314          if(FD_ISSET(_dpkgin, &rfds))
1315             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1316       }
1317       close(_dpkgin);
1318
1319       // Restore sig int/quit
1320       signal(SIGQUIT,old_SIGQUIT);
1321       signal(SIGINT,old_SIGINT);
1322
1323       signal(SIGHUP,old_SIGHUP);
1324
1325       if(master >= 0)
1326       {
1327          tcsetattr(0, TCSAFLUSH, &tt);
1328          close(master);
1329       }
1330
1331       // Check for an error code.
1332       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1333       {
1334          // if it was set to "keep-dpkg-runing" then we won't return
1335          // here but keep the loop going and just report it as a error
1336          // for later
1337          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1338
1339          if(stopOnError)
1340             RunScripts("DPkg::Post-Invoke");
1341
1342          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1343             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1344          else if (WIFEXITED(Status) != 0)
1345             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1346          else
1347             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1348
1349          if(d->dpkg_error.size() > 0)
1350             _error->Error("%s", d->dpkg_error.c_str());
1351
1352          if(stopOnError)
1353          {
1354             CloseLog();
1355             return false;
1356          }
1357       }
1358    }
1359    CloseLog();
1360
1361    if (pkgPackageManager::SigINTStop)
1362        _error->Warning(_("Operation was interrupted before it could finish"));
1363
1364    if (RunScripts("DPkg::Post-Invoke") == false)
1365       return false;
1366
1367    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1368    {
1369       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1370       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1371           unlink(oldpkgcache.c_str()) == 0)
1372       {
1373          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1374          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1375          {
1376             _error->PushToStack();
1377             pkgCacheFile CacheFile;
1378             CacheFile.BuildCaches(NULL, true);
1379             _error->RevertToStack();
1380          }
1381       }
1382    }
1383
1384    Cache.writeStateFile(NULL);
1385    return true;
1386 }
1387
1388 void SigINT(int sig) {
1389    if (_config->FindB("APT::Immediate-Configure-All",false))
1390       pkgPackageManager::SigINTStop = true;
1391 }
1392                                                                         /*}}}*/
1393 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1394 // ---------------------------------------------------------------------
1395 /* */
1396 void pkgDPkgPM::Reset()
1397 {
1398    List.erase(List.begin(),List.end());
1399 }
1400                                                                         /*}}}*/
1401 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1402 // ---------------------------------------------------------------------
1403 /* */
1404 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1405 {
1406    string pkgname, reportfile, srcpkgname, pkgver, arch;
1407    string::size_type pos;
1408    FILE *report;
1409
1410    if (_config->FindB("Dpkg::ApportFailureReport", true) == false)
1411    {
1412       std::clog << "configured to not write apport reports" << std::endl;
1413       return;
1414    }
1415
1416    // only report the first errors
1417    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1418    {
1419       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1420       return;
1421    }
1422
1423    // check if its not a follow up error
1424    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1425    if(strstr(errormsg, needle) != NULL) {
1426       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1427       return;
1428    }
1429
1430    // do not report disk-full failures
1431    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1432       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1433       return;
1434    }
1435
1436    // do not report out-of-memory failures
1437    if(strstr(errormsg, strerror(ENOMEM)) != NULL ||
1438       strstr(errormsg, "failed to allocate memory") != NULL) {
1439       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1440       return;
1441    }
1442
1443    // do not report bugs regarding inaccessible local files
1444    if(strstr(errormsg, strerror(ENOENT)) != NULL ||
1445       strstr(errormsg, "cannot access archive") != NULL) {
1446       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1447       return;
1448    }
1449
1450    // do not report errors encountered when decompressing packages
1451    if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) {
1452       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1453       return;
1454    }
1455
1456    // do not report dpkg I/O errors, this is a format string, so we compare
1457    // the prefix and the suffix of the error with the dpkg error message
1458    vector<string> io_errors;
1459    io_errors.push_back(string("failed to read on buffer copy for %s"));
1460    io_errors.push_back(string("failed in write on buffer copy for %s"));
1461    io_errors.push_back(string("short read on buffer copy for %s"));
1462
1463    for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); I++)
1464    {
1465       vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%');
1466       if (list.size() > 1) {
1467          // we need to split %s, VectorizeString only allows char so we need
1468          // to kill the "s" manually
1469          if (list[1].size() > 1) {
1470             list[1].erase(0, 1);
1471             if(strstr(errormsg, list[0].c_str()) &&
1472                strstr(errormsg, list[1].c_str())) {
1473                std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1474                return;
1475             }
1476          }
1477       }
1478    }
1479
1480    // get the pkgname and reportfile
1481    pkgname = flNotDir(pkgpath);
1482    pos = pkgname.find('_');
1483    if(pos != string::npos)
1484       pkgname = pkgname.substr(0, pos);
1485
1486    // find the package versin and source package name
1487    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1488    if (Pkg.end() == true)
1489       return;
1490    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1491    if (Ver.end() == true)
1492       return;
1493    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1494    pkgRecords Recs(Cache);
1495    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1496    srcpkgname = Parse.SourcePkg();
1497    if(srcpkgname.empty())
1498       srcpkgname = pkgname;
1499
1500    // if the file exists already, we check:
1501    // - if it was reported already (touched by apport).
1502    //   If not, we do nothing, otherwise
1503    //    we overwrite it. This is the same behaviour as apport
1504    // - if we have a report with the same pkgversion already
1505    //   then we skip it
1506    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1507    if(FileExists(reportfile))
1508    {
1509       struct stat buf;
1510       char strbuf[255];
1511
1512       // check atime/mtime
1513       stat(reportfile.c_str(), &buf);
1514       if(buf.st_mtime > buf.st_atime)
1515          return;
1516
1517       // check if the existing report is the same version
1518       report = fopen(reportfile.c_str(),"r");
1519       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1520       {
1521          if(strstr(strbuf,"Package:") == strbuf)
1522          {
1523             char pkgname[255], version[255];
1524             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
1525                if(strcmp(pkgver.c_str(), version) == 0)
1526                {
1527                   fclose(report);
1528                   return;
1529                }
1530          }
1531       }
1532       fclose(report);
1533    }
1534
1535    // now write the report
1536    arch = _config->Find("APT::Architecture");
1537    report = fopen(reportfile.c_str(),"w");
1538    if(report == NULL)
1539       return;
1540    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1541       chmod(reportfile.c_str(), 0);
1542    else
1543       chmod(reportfile.c_str(), 0600);
1544    fprintf(report, "ProblemType: Package\n");
1545    fprintf(report, "Architecture: %s\n", arch.c_str());
1546    time_t now = time(NULL);
1547    fprintf(report, "Date: %s" , ctime(&now));
1548    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1549    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1550    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1551
1552    // ensure that the log is flushed
1553    if(d->term_out)
1554       fflush(d->term_out);
1555
1556    // attach terminal log it if we have it
1557    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1558    if (!logfile_name.empty())
1559    {
1560       FILE *log = NULL;
1561       char buf[1024];
1562
1563       fprintf(report, "DpkgTerminalLog:\n");
1564       log = fopen(logfile_name.c_str(),"r");
1565       if(log != NULL)
1566       {
1567          while( fgets(buf, sizeof(buf), log) != NULL)
1568             fprintf(report, " %s", buf);
1569          fprintf(report, " \n");
1570          fclose(log);
1571       }
1572    }
1573
1574    // attach history log it if we have it
1575    string histfile_name = _config->FindFile("Dir::Log::History");
1576    if (!histfile_name.empty())
1577    {
1578       FILE *log = NULL;
1579       char buf[1024];
1580
1581       fprintf(report, "DpkgHistoryLog:\n");
1582       log = fopen(histfile_name.c_str(),"r");
1583       if(log != NULL)
1584       {
1585          while( fgets(buf, sizeof(buf), log) != NULL)
1586             fprintf(report, " %s", buf);
1587          fclose(log);
1588       }
1589    }
1590
1591    // log the ordering
1592    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1593    fprintf(report, "AptOrdering:\n");
1594    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1595       fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1596
1597    // attach dmesg log (to learn about segfaults)
1598    if (FileExists("/bin/dmesg"))
1599    {
1600       FILE *log = NULL;
1601       char buf[1024];
1602
1603       fprintf(report, "Dmesg:\n");
1604       log = popen("/bin/dmesg","r");
1605       if(log != NULL)
1606       {
1607          while( fgets(buf, sizeof(buf), log) != NULL)
1608             fprintf(report, " %s", buf);
1609          pclose(log);
1610       }
1611    }
1612
1613    // attach df -l log (to learn about filesystem status)
1614    if (FileExists("/bin/df"))
1615    {
1616       FILE *log = NULL;
1617       char buf[1024];
1618
1619       fprintf(report, "Df:\n");
1620       log = popen("/bin/df -l","r");
1621       if(log != NULL)
1622       {
1623          while( fgets(buf, sizeof(buf), log) != NULL)
1624             fprintf(report, " %s", buf);
1625          pclose(log);
1626       }
1627    }
1628
1629    fclose(report);
1630
1631 }
1632                                                                         /*}}}*/