apt-pkg/deb/dpkgpm.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
   4 /* ######################################################################
   5
   6    DPKG Package Manager - Provide an interface to dpkg
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include <config.h>
  12
  13 #include <apt-pkg/dpkgpm.h>
  14 #include <apt-pkg/error.h>
  15 #include <apt-pkg/configuration.h>
  16 #include <apt-pkg/depcache.h>
  17 #include <apt-pkg/pkgrecords.h>
  18 #include <apt-pkg/strutl.h>
  19 #include <apt-pkg/fileutl.h>
  20 #include <apt-pkg/cachefile.h>
  21 #include <apt-pkg/packagemanager.h>
  22 #include <apt-pkg/iprogress.h>
  23
  24 #include <unistd.h>
  25 #include <stdlib.h>
  26 #include <fcntl.h>
  27 #include <sys/select.h>
  28 #include <sys/stat.h>
  29 #include <sys/types.h>
  30 #include <sys/wait.h>
  31 #include <signal.h>
  32 #include <errno.h>
  33 #include <string.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <algorithm>
  37 #include <sstream>
  38 #include <map>
  39 #include <pwd.h>
  40 #include <grp.h>
  41 #include <iomanip>
  42
  43 #include <termios.h>
  44 #include <unistd.h>
  45 #include <sys/ioctl.h>
  46 #include <pty.h>
  47
  48 #include <apti18n.h>
  49                                                                         /*}}}*/
  50
  51 using namespace std;
  52
  53 class pkgDPkgPMPrivate
  54 {
  55 public:
  56    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  57                         term_out(NULL), history_out(NULL),
  58                         last_reported_progress(0.0), progress(NULL)
  59    {
  60       dpkgbuf[0] = '\0';
  61    }
  62    ~pkgDPkgPMPrivate()
  63    {
  64    }
  65
  66    bool stdin_is_dev_null;
  67    // the buffer we use for the dpkg status-fd reading
  68    char dpkgbuf[1024];
  69    int dpkgbuf_pos;
  70    FILE *term_out;
  71    FILE *history_out;
  72    string dpkg_error;
  73
  74    float last_reported_progress;
  75    APT::Progress::PackageManager *progress;
  76 };
  77
  78 namespace
  79 {
  80   // Maps the dpkg "processing" info to human readable names.  Entry 0
  81   // of each array is the key, entry 1 is the value.
  82   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  83     std::make_pair("install",   N_("Installing %s")),
  84     std::make_pair("configure", N_("Configuring %s")),
  85     std::make_pair("remove",    N_("Removing %s")),
  86     std::make_pair("purge",    N_("Completely removing %s")),
  87     std::make_pair("disappear", N_("Noting disappearance of %s")),
  88     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  89   };
  90
  91   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  92   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  93
  94   // Predicate to test whether an entry in the PackageProcessingOps
  95   // array matches a string.
  96   class MatchProcessingOp
  97   {
  98     const char *target;
  99
 100   public:
 101     MatchProcessingOp(const char *the_target)
 102       : target(the_target)
 103     {
 104     }
 105
 106     bool operator()(const std::pair<const char *, const char *> &pair) const
 107     {
 108       return strcmp(pair.first, target) == 0;
 109     }
 110   };
 111 }
 112
 113 /* helper function to ionice the given PID
 114
 115  there is no C header for ionice yet - just the syscall interface
 116  so we use the binary from util-linux
 117 */
 118 static bool
 119 ionice(int PID)
 120 {
 121    if (!FileExists("/usr/bin/ionice"))
 122       return false;
 123    pid_t Process = ExecFork();
 124    if (Process == 0)
 125    {
 126       char buf[32];
 127       snprintf(buf, sizeof(buf), "-p%d", PID);
 128       const char *Args[4];
 129       Args[0] = "/usr/bin/ionice";
 130       Args[1] = "-c3";
 131       Args[2] = buf;
 132       Args[3] = 0;
 133       execv(Args[0], (char **)Args);
 134    }
 135    return ExecWait(Process, "ionice");
 136 }
 137
 138 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 139 static void dpkgChrootDirectory()
 140 {
 141    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 142    if (chrootDir == "/")
 143       return;
 144    std::cerr << "Chrooting into " << chrootDir << std::endl;
 145    if (chroot(chrootDir.c_str()) != 0)
 146       _exit(100);
 147    if (chdir("/") != 0)
 148       _exit(100);
 149 }
 150                                                                         /*}}}*/
 151
 152
 153 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 154 // ---------------------------------------------------------------------
 155 /* This is helpful when a package is no longer installed but has residual
 156  * config files
 157  */
 158 static
 159 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 160 {
 161    pkgCache::VerIterator Ver;
 162    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 163    {
 164       pkgCache::VerFileIterator Vf = Ver.FileList();
 165       pkgCache::PkgFileIterator F = Vf.File();
 166       for (F = Vf.File(); F.end() == false; ++F)
 167       {
 168          if (F && F.Archive())
 169          {
 170             if (strcmp(F.Archive(), "now"))
 171                return Ver;
 172          }
 173       }
 174    }
 175    return Ver;
 176 }
 177                                                                         /*}}}*/
 178
 179 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 180 // ---------------------------------------------------------------------
 181 /* */
 182 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 183    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 184 {
 185    d = new pkgDPkgPMPrivate();
 186 }
 187                                                                         /*}}}*/
 188 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 189 // ---------------------------------------------------------------------
 190 /* */
 191 pkgDPkgPM::~pkgDPkgPM()
 192 {
 193    delete d;
 194 }
 195                                                                         /*}}}*/
 196 // DPkgPM::Install - Install a package                                  /*{{{*/
 197 // ---------------------------------------------------------------------
 198 /* Add an install operation to the sequence list */
 199 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 200 {
 201    if (File.empty() == true || Pkg.end() == true)
 202       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 203
 204    // If the filename string begins with DPkg::Chroot-Directory, return the
 205    // substr that is within the chroot so dpkg can access it.
 206    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 207    if (chrootdir != "/" && File.find(chrootdir) == 0)
 208    {
 209       size_t len = chrootdir.length();
 210       if (chrootdir.at(len - 1) == '/')
 211         len--;
 212       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 213    }
 214    else
 215       List.push_back(Item(Item::Install,Pkg,File));
 216
 217    return true;
 218 }
 219                                                                         /*}}}*/
 220 // DPkgPM::Configure - Configure a package                              /*{{{*/
 221 // ---------------------------------------------------------------------
 222 /* Add a configure operation to the sequence list */
 223 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 224 {
 225    if (Pkg.end() == true)
 226       return false;
 227
 228    List.push_back(Item(Item::Configure, Pkg));
 229
 230    // Use triggers for config calls if we configure "smart"
 231    // as otherwise Pre-Depends will not be satisfied, see #526774
 232    if (_config->FindB("DPkg::TriggersPending", false) == true)
 233       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 234
 235    return true;
 236 }
 237                                                                         /*}}}*/
 238 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 239 // ---------------------------------------------------------------------
 240 /* Add a remove operation to the sequence list */
 241 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 242 {
 243    if (Pkg.end() == true)
 244       return false;
 245
 246    if (Purge == true)
 247       List.push_back(Item(Item::Purge,Pkg));
 248    else
 249       List.push_back(Item(Item::Remove,Pkg));
 250    return true;
 251 }
 252                                                                         /*}}}*/
 253 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 254 // ---------------------------------------------------------------------
 255 /* This is part of the helper script communication interface, it sends
 256    very complete information down to the other end of the pipe.*/
 257 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 258 {
 259    return SendPkgsInfo(F, 2);
 260 }
 261 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 262 {
 263    // This version of APT supports only v3, so don't sent higher versions
 264    if (Version <= 3)
 265       fprintf(F,"VERSION %u\n", Version);
 266    else
 267       fprintf(F,"VERSION 3\n");
 268
 269    /* Write out all of the configuration directives by walking the
 270       configuration tree */
 271    const Configuration::Item *Top = _config->Tree(0);
 272    for (; Top != 0;)
 273    {
 274       if (Top->Value.empty() == false)
 275       {
 276          fprintf(F,"%s=%s\n",
 277                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 278                  QuoteString(Top->Value,"\n").c_str());
 279       }
 280
 281       if (Top->Child != 0)
 282       {
 283          Top = Top->Child;
 284          continue;
 285       }
 286
 287       while (Top != 0 && Top->Next == 0)
 288          Top = Top->Parent;
 289       if (Top != 0)
 290          Top = Top->Next;
 291    }
 292    fprintf(F,"\n");
 293
 294    // Write out the package actions in order.
 295    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 296    {
 297       if(I->Pkg.end() == true)
 298          continue;
 299
 300       pkgDepCache::StateCache &S = Cache[I->Pkg];
 301
 302       fprintf(F,"%s ",I->Pkg.Name());
 303
 304       // Current version which we are going to replace
 305       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 306       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 307          CurVer = FindNowVersion(I->Pkg);
 308
 309       if (CurVer.end() == true)
 310       {
 311          if (Version <= 2)
 312             fprintf(F, "- ");
 313          else
 314             fprintf(F, "- - none ");
 315       }
 316       else
 317       {
 318          fprintf(F, "%s ", CurVer.VerStr());
 319          if (Version >= 3)
 320             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 321       }
 322
 323       // Show the compare operator between current and install version
 324       if (S.InstallVer != 0)
 325       {
 326          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 327          int Comp = 2;
 328          if (CurVer.end() == false)
 329             Comp = InstVer.CompareVer(CurVer);
 330          if (Comp < 0)
 331             fprintf(F,"> ");
 332          else if (Comp == 0)
 333             fprintf(F,"= ");
 334          else if (Comp > 0)
 335             fprintf(F,"< ");
 336          fprintf(F, "%s ", InstVer.VerStr());
 337          if (Version >= 3)
 338             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 339       }
 340       else
 341       {
 342          if (Version <= 2)
 343             fprintf(F, "> - ");
 344          else
 345             fprintf(F, "> - - none ");
 346       }
 347
 348       // Show the filename/operation
 349       if (I->Op == Item::Install)
 350       {
 351          // No errors here..
 352          if (I->File[0] != '/')
 353             fprintf(F,"**ERROR**\n");
 354          else
 355             fprintf(F,"%s\n",I->File.c_str());
 356       }
 357       else if (I->Op == Item::Configure)
 358          fprintf(F,"**CONFIGURE**\n");
 359       else if (I->Op == Item::Remove ||
 360           I->Op == Item::Purge)
 361          fprintf(F,"**REMOVE**\n");
 362
 363       if (ferror(F) != 0)
 364          return false;
 365    }
 366    return true;
 367 }
 368                                                                         /*}}}*/
 369 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 370 // ---------------------------------------------------------------------
 371 /* This looks for a list of scripts to run from the configuration file
 372    each one is run and is fed on standard input a list of all .deb files
 373    that are due to be installed. */
 374 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 375 {
 376    Configuration::Item const *Opts = _config->Tree(Cnf);
 377    if (Opts == 0 || Opts->Child == 0)
 378       return true;
 379    Opts = Opts->Child;
 380
 381    unsigned int Count = 1;
 382    for (; Opts != 0; Opts = Opts->Next, Count++)
 383    {
 384       if (Opts->Value.empty() == true)
 385          continue;
 386
 387       // Determine the protocol version
 388       string OptSec = Opts->Value;
 389       string::size_type Pos;
 390       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 391          Pos = OptSec.length();
 392       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 393
 394       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 395       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 396
 397       // Create the pipes
 398       int Pipes[2];
 399       if (pipe(Pipes) != 0)
 400          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 401       if (InfoFD != (unsigned)Pipes[0])
 402          SetCloseExec(Pipes[0],true);
 403       else
 404          _config->Set("APT::Keep-Fds::", Pipes[0]);
 405       SetCloseExec(Pipes[1],true);
 406
 407       // Purified Fork for running the script
 408       pid_t Process = ExecFork();
 409       if (Process == 0)
 410       {
 411          // Setup the FDs
 412          dup2(Pipes[0], InfoFD);
 413          SetCloseExec(STDOUT_FILENO,false);
 414          SetCloseExec(STDIN_FILENO,false);
 415          SetCloseExec(STDERR_FILENO,false);
 416
 417          string hookfd;
 418          strprintf(hookfd, "%d", InfoFD);
 419          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 420
 421          dpkgChrootDirectory();
 422          const char *Args[4];
 423          Args[0] = "/bin/sh";
 424          Args[1] = "-c";
 425          Args[2] = Opts->Value.c_str();
 426          Args[3] = 0;
 427          execv(Args[0],(char **)Args);
 428          _exit(100);
 429       }
 430       if (InfoFD == (unsigned)Pipes[0])
 431          _config->Clear("APT::Keep-Fds", Pipes[0]);
 432       close(Pipes[0]);
 433       FILE *F = fdopen(Pipes[1],"w");
 434       if (F == 0)
 435          return _error->Errno("fdopen","Faild to open new FD");
 436
 437       // Feed it the filenames.
 438       if (Version <= 1)
 439       {
 440          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 441          {
 442             // Only deal with packages to be installed from .deb
 443             if (I->Op != Item::Install)
 444                continue;
 445
 446             // No errors here..
 447             if (I->File[0] != '/')
 448                continue;
 449
 450             /* Feed the filename of each package that is pending install
 451                into the pipe. */
 452             fprintf(F,"%s\n",I->File.c_str());
 453             if (ferror(F) != 0)
 454                break;
 455          }
 456       }
 457       else
 458          SendPkgsInfo(F, Version);
 459
 460       fclose(F);
 461
 462       // Clean up the sub process
 463       if (ExecWait(Process,Opts->Value.c_str()) == false)
 464          return _error->Error("Failure running script %s",Opts->Value.c_str());
 465    }
 466
 467    return true;
 468 }
 469                                                                         /*}}}*/
 470 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 471 // ---------------------------------------------------------------------
 472 /*
 473 */
 474 void pkgDPkgPM::DoStdin(int master)
 475 {
 476    unsigned char input_buf[256] = {0,};
 477    ssize_t len = read(0, input_buf, sizeof(input_buf));
 478    if (len)
 479       FileFd::Write(master, input_buf, len);
 480    else
 481       d->stdin_is_dev_null = true;
 482 }
 483                                                                         /*}}}*/
 484 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 485 // ---------------------------------------------------------------------
 486 /*
 487  * read the terminal pty and write log
 488  */
 489 void pkgDPkgPM::DoTerminalPty(int master)
 490 {
 491    unsigned char term_buf[1024] = {0,0, };
 492
 493    ssize_t len=read(master, term_buf, sizeof(term_buf));
 494    if(len == -1 && errno == EIO)
 495    {
 496       // this happens when the child is about to exit, we
 497       // give it time to actually exit, otherwise we run
 498       // into a race so we sleep for half a second.
 499       struct timespec sleepfor = { 0, 500000000 };
 500       nanosleep(&sleepfor, NULL);
 501       return;
 502    }
 503    if(len <= 0)
 504       return;
 505    FileFd::Write(1, term_buf, len);
 506    if(d->term_out)
 507       fwrite(term_buf, len, sizeof(char), d->term_out);
 508 }
 509                                                                         /*}}}*/
 510 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 511 // ---------------------------------------------------------------------
 512 /*
 513  */
 514 void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
 515 {
 516    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 517
 518    if (Debug == true)
 519       std::clog << "got from dpkg '" << line << "'" << std::endl;
 520
 521
 522    /* dpkg sends strings like this:
 523       'status:   <pkg>: <pkg  qstate>'
 524       'status:   <pkg>:<arch>: <pkg  qstate>'
 525       errors look like this:
 526       '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
 527       and conffile-prompt like this
 528       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 529
 530       Newer versions of dpkg sent also:
 531       'processing: install: pkg'
 532       'processing: configure: pkg'
 533       'processing: remove: pkg'
 534       'processing: purge: pkg'
 535       'processing: disappear: pkg'
 536       'processing: trigproc: trigger'
 537
 538    */
 539    // we need to split on ": " (note the appended space) as the ':' is
 540    // part of the pkgname:arch information that dpkg sends
 541    //
 542    // A dpkg error message may contain additional ":" (like
 543    //  "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 544    // so we need to ensure to not split too much
 545    std::vector<std::string> list = StringSplit(line, ": ", 4);
 546    if(list.size() < 3)
 547    {
 548       if (Debug == true)
 549          std::clog << "ignoring line: not enough ':'" << std::endl;
 550       return;
 551    }
 552    // dpkg does not send always send "pkgname:arch" so we add it here if needed
 553    std::string pkgname = list[1];
 554    if (pkgname.find(":") == std::string::npos)
 555    {
 556       // find the package in the group that is in a touched by dpkg
 557       // if there are multiple dpkg will send us a full pkgname:arch
 558       pkgCache::GrpIterator Grp = Cache.FindGrp(pkgname);
 559       if (Grp.end() == false)
 560       {
 561           pkgCache::PkgIterator P = Grp.PackageList();
 562           for (; P.end() != true; P = Grp.NextPkg(P))
 563           {
 564               if(Cache[P].Mode != pkgDepCache::ModeKeep)
 565               {
 566                   pkgname = P.FullName();
 567                   break;
 568               }
 569           }
 570       }
 571    }
 572    const char* const pkg = pkgname.c_str();
 573    const char* action = list[2].c_str();
 574
 575    std::string short_pkgname = StringSplit(pkgname, ":")[0];
 576    std::string i18n_pkgname = short_pkgname;
 577    if (pkgname.find(":") != string::npos)
 578    {
 579       strprintf(i18n_pkgname, "%s (%s)", short_pkgname.c_str(),
 580                 StringSplit(pkgname, ":")[1].c_str());
 581    }
 582
 583    // 'processing' from dpkg looks like
 584    // 'processing: action: pkg'
 585    if(strncmp(list[0].c_str(), "processing", strlen("processing")) == 0)
 586    {
 587       const char* const pkg_or_trigger = list[2].c_str();
 588       action =  list[1].c_str();
 589       const std::pair<const char *, const char *> * const iter =
 590         std::find_if(PackageProcessingOpsBegin,
 591                      PackageProcessingOpsEnd,
 592                      MatchProcessingOp(action));
 593       if(iter == PackageProcessingOpsEnd)
 594       {
 595          if (Debug == true)
 596             std::clog << "ignoring unknown action: " << action << std::endl;
 597          return;
 598       }
 599       std::string pkg_action;
 600       strprintf(pkg_action, _(iter->second), pkg_or_trigger);
 601
 602       d->progress->StatusChanged(pkg_or_trigger, PackagesDone, PackagesTotal,
 603                                  pkg_action);
 604       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 605          handleDisappearAction(pkg_or_trigger);
 606       return;
 607    }
 608
 609    if(strncmp(action,"error",strlen("error")) == 0)
 610    {
 611       d->progress->Error(list[1], PackagesDone, PackagesTotal, list[3]);
 612       pkgFailures++;
 613       WriteApportReport(list[1].c_str(), list[3].c_str());
 614       return;
 615    }
 616    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 617    {
 618       d->progress->ConffilePrompt(list[1], PackagesDone, PackagesTotal,
 619                                   list[3]);
 620       return;
 621    }
 622
 623    vector<struct DpkgState> const &states = PackageOps[pkg];
 624    const char *next_action = NULL;
 625    if(PackageOpsDone[pkg] < states.size())
 626       next_action = states[PackageOpsDone[pkg]].state;
 627    // check if the package moved to the next dpkg state
 628    if(next_action && (strcmp(action, next_action) == 0))
 629    {
 630       // only read the translation if there is actually a next
 631       // action
 632       std::string translation;
 633       strprintf(translation, _(states[PackageOpsDone[pkg]].str),
 634                 i18n_pkgname.c_str());
 635
 636       // we moved from one dpkg state to a new one, report that
 637       PackageOpsDone[pkg]++;
 638       PackagesDone++;
 639
 640       // and send to the progress
 641       d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal,
 642                                  translation);
 643    }
 644    if (Debug == true)
 645       std::clog << "(parsed from dpkg) pkg: " << pkgname
 646                 << " action: " << action << endl;
 647 }
 648                                                                         /*}}}*/
 649 // DPkgPM::handleDisappearAction                                        /*{{{*/
 650 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 651 {
 652    // record the package name for display and stuff later
 653    disappearedPkgs.insert(pkgname);
 654
 655    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 656    if (unlikely(Pkg.end() == true))
 657       return;
 658    // the disappeared package was auto-installed - nothing to do
 659    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 660       return;
 661    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 662    if (unlikely(PkgVer.end() == true))
 663       return;
 664    /* search in the list of dependencies for (Pre)Depends,
 665       check if this dependency has a Replaces on our package
 666       and if so transfer the manual installed flag to it */
 667    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 668    {
 669       if (Dep->Type != pkgCache::Dep::Depends &&
 670           Dep->Type != pkgCache::Dep::PreDepends)
 671          continue;
 672       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 673       if (unlikely(Tar.end() == true))
 674          continue;
 675       // the package is already marked as manual
 676       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 677          continue;
 678       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 679       if (TarVer.end() == true)
 680          continue;
 681       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 682       {
 683          if (Rep->Type != pkgCache::Dep::Replaces)
 684             continue;
 685          if (Pkg != Rep.TargetPkg())
 686             continue;
 687          // okay, they are strongly connected - transfer manual-bit
 688          if (Debug == true)
 689             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 690          Cache[Tar].Flags &= ~Flag::Auto;
 691          break;
 692       }
 693    }
 694 }
 695                                                                         /*}}}*/
 696 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 697 // ---------------------------------------------------------------------
 698 /*
 699  */
 700 void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
 701 {
 702    char *p, *q;
 703    int len;
 704
 705    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 706    d->dpkgbuf_pos += len;
 707    if(len <= 0)
 708       return;
 709
 710    // process line by line if we have a buffer
 711    p = q = d->dpkgbuf;
 712    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 713    {
 714       *q = 0;
 715       ProcessDpkgStatusLine(p);
 716       p=q+1; // continue with next line
 717    }
 718
 719    // now move the unprocessed bits (after the final \n that is now a 0x0)
 720    // to the start and update d->dpkgbuf_pos
 721    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 722    if(p == NULL)
 723       return;
 724
 725    // we are interessted in the first char *after* 0x0
 726    p++;
 727
 728    // move the unprocessed tail to the start and update pos
 729    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 730    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 731 }
 732                                                                         /*}}}*/
 733 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 734 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 735 {
 736    size_t const length = value.length();
 737    if (length == 0)
 738       return;
 739    // poor mans rstrip(", ")
 740    if (value[length-2] == ',' && value[length-1] == ' ')
 741       value.erase(length - 2, 2);
 742    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 743 }                                                                       /*}}}*/
 744 // DPkgPM::OpenLog                                                      /*{{{*/
 745 bool pkgDPkgPM::OpenLog()
 746 {
 747    string const logdir = _config->FindDir("Dir::Log");
 748    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 749       // FIXME: use a better string after freeze
 750       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 751
 752    // get current time
 753    char timestr[200];
 754    time_t const t = time(NULL);
 755    struct tm const * const tmp = localtime(&t);
 756    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 757
 758    // open terminal log
 759    string const logfile_name = flCombine(logdir,
 760                                    _config->Find("Dir::Log::Terminal"));
 761    if (!logfile_name.empty())
 762    {
 763       d->term_out = fopen(logfile_name.c_str(),"a");
 764       if (d->term_out == NULL)
 765          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 766       setvbuf(d->term_out, NULL, _IONBF, 0);
 767       SetCloseExec(fileno(d->term_out), true);
 768       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 769       {
 770          struct passwd *pw = getpwnam("root");
 771          struct group *gr = getgrnam("adm");
 772          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 773             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 774       }
 775       if (chmod(logfile_name.c_str(), 0640) != 0)
 776          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 777       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 778    }
 779
 780    // write your history
 781    string const history_name = flCombine(logdir,
 782                                    _config->Find("Dir::Log::History"));
 783    if (!history_name.empty())
 784    {
 785       d->history_out = fopen(history_name.c_str(),"a");
 786       if (d->history_out == NULL)
 787          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 788       SetCloseExec(fileno(d->history_out), true);
 789       chmod(history_name.c_str(), 0644);
 790       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 791       string remove, purge, install, reinstall, upgrade, downgrade;
 792       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 793       {
 794          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 795          string *line = NULL;
 796          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 797          if (Cache[I].NewInstall() == true)
 798             HISTORYINFO(install, CANDIDATE_AUTO)
 799          else if (Cache[I].ReInstall() == true)
 800             HISTORYINFO(reinstall, CANDIDATE)
 801          else if (Cache[I].Upgrade() == true)
 802             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 803          else if (Cache[I].Downgrade() == true)
 804             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 805          else if (Cache[I].Delete() == true)
 806             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 807          else
 808             continue;
 809          #undef HISTORYINFO
 810          line->append(I.FullName(false)).append(" (");
 811          switch (infostring) {
 812          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 813          case CANDIDATE_AUTO:
 814             line->append(Cache[I].CandVersion);
 815             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 816                line->append(", automatic");
 817             break;
 818          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 819          case CURRENT: line->append(Cache[I].CurVersion); break;
 820          }
 821          line->append("), ");
 822       }
 823       if (_config->Exists("Commandline::AsString") == true)
 824          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 825       WriteHistoryTag("Install", install);
 826       WriteHistoryTag("Reinstall", reinstall);
 827       WriteHistoryTag("Upgrade", upgrade);
 828       WriteHistoryTag("Downgrade",downgrade);
 829       WriteHistoryTag("Remove",remove);
 830       WriteHistoryTag("Purge",purge);
 831       fflush(d->history_out);
 832    }
 833
 834    return true;
 835 }
 836                                                                         /*}}}*/
 837 // DPkg::CloseLog                                                       /*{{{*/
 838 bool pkgDPkgPM::CloseLog()
 839 {
 840    char timestr[200];
 841    time_t t = time(NULL);
 842    struct tm *tmp = localtime(&t);
 843    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 844
 845    if(d->term_out)
 846    {
 847       fprintf(d->term_out, "Log ended: ");
 848       fprintf(d->term_out, "%s", timestr);
 849       fprintf(d->term_out, "\n");
 850       fclose(d->term_out);
 851    }
 852    d->term_out = NULL;
 853
 854    if(d->history_out)
 855    {
 856       if (disappearedPkgs.empty() == false)
 857       {
 858          string disappear;
 859          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 860               d != disappearedPkgs.end(); ++d)
 861          {
 862             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 863             disappear.append(*d);
 864             if (P.end() == true)
 865                disappear.append(", ");
 866             else
 867                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 868          }
 869          WriteHistoryTag("Disappeared", disappear);
 870       }
 871       if (d->dpkg_error.empty() == false)
 872          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 873       fprintf(d->history_out, "End-Date: %s\n", timestr);
 874       fclose(d->history_out);
 875    }
 876    d->history_out = NULL;
 877
 878    return true;
 879 }
 880                                                                         /*}}}*/
 881 // This implements a racy version of pselect for those architectures
 882 // that don't have a working implementation.
 883 // FIXME: Probably can be removed on Lenny+1
 884 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 885    fd_set *exceptfds, const struct timespec *timeout,
 886    const sigset_t *sigmask)
 887 {
 888    sigset_t origmask;
 889    struct timeval tv;
 890    int retval;
 891
 892    tv.tv_sec = timeout->tv_sec;
 893    tv.tv_usec = timeout->tv_nsec/1000;
 894
 895    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 896    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 897    sigprocmask(SIG_SETMASK, &origmask, 0);
 898    return retval;
 899 }
 900 /*}}}*/
 901
 902
 903 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 904 // ---------------------------------------------------------------------
 905 /* This globs the operations and calls dpkg
 906  *
 907  * If it is called with a progress object apt will report the install
 908  * progress to this object. It maps the dpkg states a package goes
 909  * through to human readable (and i10n-able)
 910  * names and calculates a percentage for each step.
 911 */
 912 bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
 913 {
 914    pkgPackageManager::SigINTStop = false;
 915    d->progress = progress;
 916
 917    // Generate the base argument list for dpkg
 918    std::vector<const char *> Args;
 919    unsigned long StartSize = 0;
 920    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 921    {
 922       string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 923       size_t dpkgChrootLen = dpkgChrootDir.length();
 924       if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 925       {
 926          if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 927             --dpkgChrootLen;
 928          Tmp = Tmp.substr(dpkgChrootLen);
 929       }
 930    }
 931    Args.push_back(Tmp.c_str());
 932    StartSize += Tmp.length();
 933
 934    // Stick in any custom dpkg options
 935    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 936    if (Opts != 0)
 937    {
 938       Opts = Opts->Child;
 939       for (; Opts != 0; Opts = Opts->Next)
 940       {
 941          if (Opts->Value.empty() == true)
 942             continue;
 943          Args.push_back(Opts->Value.c_str());
 944          StartSize += Opts->Value.length();
 945       }
 946    }
 947
 948    size_t const BaseArgs = Args.size();
 949    // we need to detect if we can qualify packages with the architecture or not
 950    Args.push_back("--assert-multi-arch");
 951    Args.push_back(NULL);
 952
 953    pid_t dpkgAssertMultiArch = ExecFork();
 954    if (dpkgAssertMultiArch == 0)
 955    {
 956       dpkgChrootDirectory();
 957       // redirect everything to the ultimate sink as we only need the exit-status
 958       int const nullfd = open("/dev/null", O_RDONLY);
 959       dup2(nullfd, STDIN_FILENO);
 960       dup2(nullfd, STDOUT_FILENO);
 961       dup2(nullfd, STDERR_FILENO);
 962       execvp(Args[0], (char**) &Args[0]);
 963       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
 964       _exit(2);
 965    }
 966
 967    fd_set rfds;
 968    struct timespec tv;
 969    sigset_t sigmask;
 970    sigset_t original_sigmask;
 971
 972    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 973    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 974    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 975
 976    if (RunScripts("DPkg::Pre-Invoke") == false)
 977       return false;
 978
 979    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 980       return false;
 981
 982    // support subpressing of triggers processing for special
 983    // cases like d-i that runs the triggers handling manually
 984    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 985    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 986    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 987       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 988
 989    // map the dpkg states to the operations that are performed
 990    // (this is sorted in the same way as Item::Ops)
 991    static const struct DpkgState DpkgStatesOpMap[][7] = {
 992       // Install operation
 993       {
 994          {"half-installed", N_("Preparing %s")},
 995          {"unpacked", N_("Unpacking %s") },
 996          {NULL, NULL}
 997       },
 998       // Configure operation
 999       {
1000          {"unpacked",N_("Preparing to configure %s") },
1001          {"half-configured", N_("Configuring %s") },
1002          { "installed", N_("Installed %s")},
1003          {NULL, NULL}
1004       },
1005       // Remove operation
1006       {
1007          {"half-configured", N_("Preparing for removal of %s")},
1008          {"half-installed", N_("Removing %s")},
1009          {"config-files",  N_("Removed %s")},
1010          {NULL, NULL}
1011       },
1012       // Purge operation
1013       {
1014          {"config-files", N_("Preparing to completely remove %s")},
1015          {"not-installed", N_("Completely removed %s")},
1016          {NULL, NULL}
1017       },
1018    };
1019
1020    // init the PackageOps map, go over the list of packages that
1021    // that will be [installed|configured|removed|purged] and add
1022    // them to the PackageOps map (the dpkg states it goes through)
1023    // and the PackageOpsTranslations (human readable strings)
1024    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1025    {
1026       if((*I).Pkg.end() == true)
1027          continue;
1028
1029       string const name = (*I).Pkg.FullName();
1030       PackageOpsDone[name] = 0;
1031       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1032       {
1033          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1034          PackagesTotal++;
1035       }
1036    }
1037
1038    d->stdin_is_dev_null = false;
1039
1040    // create log
1041    OpenLog();
1042
1043    bool dpkgMultiArch = false;
1044    if (dpkgAssertMultiArch > 0)
1045    {
1046       int Status = 0;
1047       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1048       {
1049          if (errno == EINTR)
1050             continue;
1051          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1052          break;
1053       }
1054       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1055          dpkgMultiArch = true;
1056    }
1057
1058    // this loop is runs once per operation
1059    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
1060    {
1061       // Do all actions with the same Op in one run
1062       vector<Item>::const_iterator J = I;
1063       if (TriggersPending == true)
1064          for (; J != List.end(); ++J)
1065          {
1066             if (J->Op == I->Op)
1067                continue;
1068             if (J->Op != Item::TriggersPending)
1069                break;
1070             vector<Item>::const_iterator T = J + 1;
1071             if (T != List.end() && T->Op == I->Op)
1072                continue;
1073             break;
1074          }
1075       else
1076          for (; J != List.end() && J->Op == I->Op; ++J)
1077             /* nothing */;
1078
1079       // keep track of allocated strings for multiarch package names
1080       std::vector<char *> Packages;
1081
1082       // start with the baseset of arguments
1083       unsigned long Size = StartSize;
1084       Args.erase(Args.begin() + BaseArgs, Args.end());
1085
1086       // Now check if we are within the MaxArgs limit
1087       //
1088       // this code below is problematic, because it may happen that
1089       // the argument list is split in a way that A depends on B
1090       // and they are in the same "--configure A B" run
1091       // - with the split they may now be configured in different
1092       //   runs, using Immediate-Configure-All can help prevent this.
1093       if (J - I > (signed)MaxArgs)
1094       {
1095          J = I + MaxArgs;
1096          unsigned long const size = MaxArgs + 10;
1097          Args.reserve(size);
1098          Packages.reserve(size);
1099       }
1100       else
1101       {
1102          unsigned long const size = (J - I) + 10;
1103          Args.reserve(size);
1104          Packages.reserve(size);
1105       }
1106
1107       int fd[2];
1108       if (pipe(fd) != 0)
1109          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1110
1111 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1112 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1113
1114       ADDARGC("--status-fd");
1115       char status_fd_buf[20];
1116       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1117       ADDARG(status_fd_buf);
1118       unsigned long const Op = I->Op;
1119
1120       switch (I->Op)
1121       {
1122          case Item::Remove:
1123          ADDARGC("--force-depends");
1124          ADDARGC("--force-remove-essential");
1125          ADDARGC("--remove");
1126          break;
1127
1128          case Item::Purge:
1129          ADDARGC("--force-depends");
1130          ADDARGC("--force-remove-essential");
1131          ADDARGC("--purge");
1132          break;
1133
1134          case Item::Configure:
1135          ADDARGC("--configure");
1136          break;
1137
1138          case Item::ConfigurePending:
1139          ADDARGC("--configure");
1140          ADDARGC("--pending");
1141          break;
1142
1143          case Item::TriggersPending:
1144          ADDARGC("--triggers-only");
1145          ADDARGC("--pending");
1146          break;
1147
1148          case Item::Install:
1149          ADDARGC("--unpack");
1150          ADDARGC("--auto-deconfigure");
1151          break;
1152       }
1153
1154       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1155           I->Op != Item::ConfigurePending)
1156       {
1157          ADDARGC("--no-triggers");
1158       }
1159 #undef ADDARGC
1160
1161       // Write in the file or package names
1162       if (I->Op == Item::Install)
1163       {
1164          for (;I != J && Size < MaxArgBytes; ++I)
1165          {
1166             if (I->File[0] != '/')
1167                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1168             Args.push_back(I->File.c_str());
1169             Size += I->File.length();
1170          }
1171       }
1172       else
1173       {
1174          string const nativeArch = _config->Find("APT::Architecture");
1175          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1176          for (;I != J && Size < MaxArgBytes; ++I)
1177          {
1178             if((*I).Pkg.end() == true)
1179                continue;
1180             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1181                continue;
1182             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1183             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1184                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1185                                            strcmp(I->Pkg.Arch(), "none") == 0))
1186             {
1187                char const * const name = I->Pkg.Name();
1188                ADDARG(name);
1189             }
1190             else
1191             {
1192                pkgCache::VerIterator PkgVer;
1193                std::string name = I->Pkg.Name();
1194                if (Op == Item::Remove || Op == Item::Purge)
1195                {
1196                   PkgVer = I->Pkg.CurrentVer();
1197                   if(PkgVer.end() == true)
1198                      PkgVer = FindNowVersion(I->Pkg);
1199                }
1200                else
1201                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1202                if (strcmp(I->Pkg.Arch(), "none") == 0)
1203                   ; // never arch-qualify a package without an arch
1204                else if (PkgVer.end() == false)
1205                   name.append(":").append(PkgVer.Arch());
1206                else
1207                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1208                char * const fullname = strdup(name.c_str());
1209                Packages.push_back(fullname);
1210                ADDARG(fullname);
1211             }
1212          }
1213          // skip configure action if all sheduled packages disappeared
1214          if (oldSize == Size)
1215             continue;
1216       }
1217 #undef ADDARG
1218
1219       J = I;
1220
1221       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1222       {
1223          for (std::vector<const char *>::const_iterator a = Args.begin();
1224               a != Args.end(); ++a)
1225             clog << *a << ' ';
1226          clog << endl;
1227          continue;
1228       }
1229       Args.push_back(NULL);
1230
1231       cout << flush;
1232       clog << flush;
1233       cerr << flush;
1234
1235       /* Mask off sig int/quit. We do this because dpkg also does when
1236          it forks scripts. What happens is that when you hit ctrl-c it sends
1237          it to all processes in the group. Since dpkg ignores the signal
1238          it doesn't die but we do! So we must also ignore it */
1239       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1240       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1241
1242       // Check here for any SIGINT
1243       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1244          break;
1245
1246
1247       // ignore SIGHUP as well (debian #463030)
1248       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1249
1250       struct    termios tt;
1251       struct    winsize win;
1252       int       master = -1;
1253       int       slave = -1;
1254
1255       // if tcgetattr does not return zero there was a error
1256       // and we do not do any pty magic
1257       _error->PushToStack();
1258       if (tcgetattr(STDOUT_FILENO, &tt) == 0)
1259       {
1260          ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&win);
1261          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1262          {
1263             _error->Errno("openpty", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1264             master = slave = -1;
1265          }  else {
1266             struct termios rtt;
1267             rtt = tt;
1268             cfmakeraw(&rtt);
1269             rtt.c_lflag &= ~ECHO;
1270             rtt.c_lflag |= ISIG;
1271             // block SIGTTOU during tcsetattr to prevent a hang if
1272             // the process is a member of the background process group
1273             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1274             sigemptyset(&sigmask);
1275             sigaddset(&sigmask, SIGTTOU);
1276             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1277             tcsetattr(0, TCSAFLUSH, &rtt);
1278             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1279          }
1280       }
1281       // complain only if stdout is either a terminal (but still failed) or is an invalid
1282       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1283       else if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1284          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1285
1286       if (_error->PendingError() == true)
1287          _error->DumpErrors(std::cerr);
1288       _error->RevertToStack();
1289
1290       // this is the dpkg status-fd, we need to keep it
1291       _config->Set("APT::Keep-Fds::",fd[1]);
1292
1293        // Tell the progress that its starting and fork dpkg
1294       // FIXME: this is called once per dpkg run which is *too often*
1295       d->progress->Start();
1296
1297       pid_t Child = ExecFork();
1298       // This is the child
1299       if (Child == 0)
1300       {
1301
1302          if(slave >= 0 && master >= 0)
1303          {
1304             setsid();
1305             ioctl(slave, TIOCSCTTY, 0);
1306             close(master);
1307             dup2(slave, 0);
1308             dup2(slave, 1);
1309             dup2(slave, 2);
1310             close(slave);
1311          }
1312          close(fd[0]); // close the read end of the pipe
1313
1314          dpkgChrootDirectory();
1315
1316          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1317             _exit(100);
1318
1319          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1320          {
1321             int Flags,dummy;
1322             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1323                _exit(100);
1324
1325             // Discard everything in stdin before forking dpkg
1326             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1327                _exit(100);
1328
1329             while (read(STDIN_FILENO,&dummy,1) == 1);
1330
1331             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1332                _exit(100);
1333          }
1334
1335          /* No Job Control Stop Env is a magic dpkg var that prevents it
1336             from using sigstop */
1337          putenv((char *)"DPKG_NO_TSTP=yes");
1338          execvp(Args[0], (char**) &Args[0]);
1339          cerr << "Could not exec dpkg!" << endl;
1340          _exit(100);
1341       }
1342
1343       // apply ionice
1344       if (_config->FindB("DPkg::UseIoNice", false) == true)
1345          ionice(Child);
1346
1347       // clear the Keep-Fd again
1348       _config->Clear("APT::Keep-Fds",fd[1]);
1349
1350       // Wait for dpkg
1351       int Status = 0;
1352
1353       // we read from dpkg here
1354       int const _dpkgin = fd[0];
1355       close(fd[1]);                        // close the write end of the pipe
1356
1357       if(slave > 0)
1358          close(slave);
1359
1360       // setups fds
1361       sigemptyset(&sigmask);
1362       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1363
1364       /* free vectors (and therefore memory) as we don't need the included data anymore */
1365       for (std::vector<char *>::const_iterator p = Packages.begin();
1366            p != Packages.end(); ++p)
1367          free(*p);
1368       Packages.clear();
1369
1370       // the result of the waitpid call
1371       int res;
1372       int select_ret;
1373       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1374          if(res < 0) {
1375             // FIXME: move this to a function or something, looks ugly here
1376             // error handling, waitpid returned -1
1377             if (errno == EINTR)
1378                continue;
1379             RunScripts("DPkg::Post-Invoke");
1380
1381             // Restore sig int/quit
1382             signal(SIGQUIT,old_SIGQUIT);
1383             signal(SIGINT,old_SIGINT);
1384
1385             signal(SIGHUP,old_SIGHUP);
1386             return _error->Errno("waitpid","Couldn't wait for subprocess");
1387          }
1388
1389          // wait for input or output here
1390          FD_ZERO(&rfds);
1391          if (master >= 0 && !d->stdin_is_dev_null)
1392             FD_SET(0, &rfds);
1393          FD_SET(_dpkgin, &rfds);
1394          if(master >= 0)
1395             FD_SET(master, &rfds);
1396          tv.tv_sec = 0;
1397          tv.tv_nsec = d->progress->GetPulseInterval();
1398          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1399                               &tv, &original_sigmask);
1400          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1401             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1402                                       NULL, &tv, &original_sigmask);
1403          d->progress->Pulse();
1404
1405          if (select_ret == 0)
1406             continue;
1407          else if (select_ret < 0 && errno == EINTR)
1408             continue;
1409          else if (select_ret < 0)
1410          {
1411             perror("select() returned error");
1412             continue;
1413          }
1414
1415          if(master >= 0 && FD_ISSET(master, &rfds))
1416             DoTerminalPty(master);
1417          if(master >= 0 && FD_ISSET(0, &rfds))
1418             DoStdin(master);
1419          if(FD_ISSET(_dpkgin, &rfds))
1420             DoDpkgStatusFd(_dpkgin);
1421       }
1422       close(_dpkgin);
1423
1424       // Restore sig int/quit
1425       signal(SIGQUIT,old_SIGQUIT);
1426       signal(SIGINT,old_SIGINT);
1427
1428       signal(SIGHUP,old_SIGHUP);
1429
1430       if(master >= 0)
1431       {
1432          tcsetattr(0, TCSAFLUSH, &tt);
1433          close(master);
1434       }
1435
1436       // Check for an error code.
1437       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1438       {
1439          // if it was set to "keep-dpkg-runing" then we won't return
1440          // here but keep the loop going and just report it as a error
1441          // for later
1442          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1443
1444          if(stopOnError)
1445             RunScripts("DPkg::Post-Invoke");
1446
1447          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1448             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1449          else if (WIFEXITED(Status) != 0)
1450             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1451          else
1452             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1453
1454          if(d->dpkg_error.size() > 0)
1455             _error->Error("%s", d->dpkg_error.c_str());
1456
1457          if(stopOnError)
1458          {
1459             CloseLog();
1460             d->progress->Stop();
1461             return false;
1462          }
1463       }
1464    }
1465    CloseLog();
1466
1467    // dpkg is done at this point
1468    d->progress->StatusChanged("", PackagesDone, PackagesTotal, "");
1469    d->progress->Stop();
1470
1471
1472    if (pkgPackageManager::SigINTStop)
1473        _error->Warning(_("Operation was interrupted before it could finish"));
1474
1475    if (RunScripts("DPkg::Post-Invoke") == false)
1476       return false;
1477
1478    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1479    {
1480       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1481       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1482           unlink(oldpkgcache.c_str()) == 0)
1483       {
1484          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1485          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1486          {
1487             _error->PushToStack();
1488             pkgCacheFile CacheFile;
1489             CacheFile.BuildCaches(NULL, true);
1490             _error->RevertToStack();
1491          }
1492       }
1493    }
1494
1495    Cache.writeStateFile(NULL);
1496    return true;
1497 }
1498
1499 void SigINT(int sig) {
1500    pkgPackageManager::SigINTStop = true;
1501 }
1502                                                                         /*}}}*/
1503 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1504 // ---------------------------------------------------------------------
1505 /* */
1506 void pkgDPkgPM::Reset()
1507 {
1508    List.erase(List.begin(),List.end());
1509 }
1510                                                                         /*}}}*/
1511 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1512 // ---------------------------------------------------------------------
1513 /* */
1514 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1515 {
1516    // If apport doesn't exist or isn't installed do nothing
1517    // This e.g. prevents messages in 'universes' without apport
1518    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1519    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1520       return;
1521
1522    string pkgname, reportfile, srcpkgname, pkgver, arch;
1523    string::size_type pos;
1524    FILE *report;
1525
1526    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1527    {
1528       std::clog << "configured to not write apport reports" << std::endl;
1529       return;
1530    }
1531
1532    // only report the first errors
1533    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1534    {
1535       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1536       return;
1537    }
1538
1539    // check if its not a follow up error
1540    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1541    if(strstr(errormsg, needle) != NULL) {
1542       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1543       return;
1544    }
1545
1546    // do not report disk-full failures
1547    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1548       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1549       return;
1550    }
1551
1552    // do not report out-of-memory failures
1553    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1554       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1555       return;
1556    }
1557
1558    // do not report dpkg I/O errors
1559    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1560    if(strstr(errormsg, "short read in buffer_copy (")) {
1561       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1562       return;
1563    }
1564
1565    // get the pkgname and reportfile
1566    pkgname = flNotDir(pkgpath);
1567    pos = pkgname.find('_');
1568    if(pos != string::npos)
1569       pkgname = pkgname.substr(0, pos);
1570
1571    // find the package versin and source package name
1572    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1573    if (Pkg.end() == true)
1574       return;
1575    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1576    if (Ver.end() == true)
1577       return;
1578    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1579    pkgRecords Recs(Cache);
1580    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1581    srcpkgname = Parse.SourcePkg();
1582    if(srcpkgname.empty())
1583       srcpkgname = pkgname;
1584
1585    // if the file exists already, we check:
1586    // - if it was reported already (touched by apport).
1587    //   If not, we do nothing, otherwise
1588    //    we overwrite it. This is the same behaviour as apport
1589    // - if we have a report with the same pkgversion already
1590    //   then we skip it
1591    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1592    if(FileExists(reportfile))
1593    {
1594       struct stat buf;
1595       char strbuf[255];
1596
1597       // check atime/mtime
1598       stat(reportfile.c_str(), &buf);
1599       if(buf.st_mtime > buf.st_atime)
1600          return;
1601
1602       // check if the existing report is the same version
1603       report = fopen(reportfile.c_str(),"r");
1604       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1605       {
1606          if(strstr(strbuf,"Package:") == strbuf)
1607          {
1608             char pkgname[255], version[255];
1609             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1610                if(strcmp(pkgver.c_str(), version) == 0)
1611                {
1612                   fclose(report);
1613                   return;
1614                }
1615          }
1616       }
1617       fclose(report);
1618    }
1619
1620    // now write the report
1621    arch = _config->Find("APT::Architecture");
1622    report = fopen(reportfile.c_str(),"w");
1623    if(report == NULL)
1624       return;
1625    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1626       chmod(reportfile.c_str(), 0);
1627    else
1628       chmod(reportfile.c_str(), 0600);
1629    fprintf(report, "ProblemType: Package\n");
1630    fprintf(report, "Architecture: %s\n", arch.c_str());
1631    time_t now = time(NULL);
1632    fprintf(report, "Date: %s" , ctime(&now));
1633    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1634    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1635    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1636
1637    // ensure that the log is flushed
1638    if(d->term_out)
1639       fflush(d->term_out);
1640
1641    // attach terminal log it if we have it
1642    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1643    if (!logfile_name.empty())
1644    {
1645       FILE *log = NULL;
1646
1647       fprintf(report, "DpkgTerminalLog:\n");
1648       log = fopen(logfile_name.c_str(),"r");
1649       if(log != NULL)
1650       {
1651          char buf[1024];
1652          while( fgets(buf, sizeof(buf), log) != NULL)
1653             fprintf(report, " %s", buf);
1654          fclose(log);
1655       }
1656    }
1657
1658    // log the ordering
1659    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1660    fprintf(report, "AptOrdering:\n");
1661    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1662       if ((*I).Pkg != NULL)
1663          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1664       else
1665          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1666
1667    // attach dmesg log (to learn about segfaults)
1668    if (FileExists("/bin/dmesg"))
1669    {
1670       fprintf(report, "Dmesg:\n");
1671       FILE *log = popen("/bin/dmesg","r");
1672       if(log != NULL)
1673       {
1674          char buf[1024];
1675          while( fgets(buf, sizeof(buf), log) != NULL)
1676             fprintf(report, " %s", buf);
1677          pclose(log);
1678       }
1679    }
1680
1681    // attach df -l log (to learn about filesystem status)
1682    if (FileExists("/bin/df"))
1683    {
1684
1685       fprintf(report, "Df:\n");
1686       FILE *log = popen("/bin/df -l","r");
1687       if(log != NULL)
1688       {
1689          char buf[1024];
1690          while( fgets(buf, sizeof(buf), log) != NULL)
1691             fprintf(report, " %s", buf);
1692          pclose(log);
1693       }
1694    }
1695
1696    fclose(report);
1697
1698 }
1699                                                                         /*}}}*/