apt-pkg/deb/dpkgpm.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
   4 /* ######################################################################
   5
   6    DPKG Package Manager - Provide an interface to dpkg
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include <config.h>
  12
  13 #include <apt-pkg/cachefile.h>
  14 #include <apt-pkg/configuration.h>
  15 #include <apt-pkg/depcache.h>
  16 #include <apt-pkg/dpkgpm.h>
  17 #include <apt-pkg/error.h>
  18 #include <apt-pkg/fileutl.h>
  19 #include <apt-pkg/install-progress.h>
  20 #include <apt-pkg/packagemanager.h>
  21 #include <apt-pkg/pkgrecords.h>
  22 #include <apt-pkg/strutl.h>
  23 #include <apt-pkg/cacheiterators.h>
  24 #include <apt-pkg/macros.h>
  25 #include <apt-pkg/pkgcache.h>
  26
  27 #include <errno.h>
  28 #include <fcntl.h>
  29 #include <grp.h>
  30 #include <pty.h>
  31 #include <pwd.h>
  32 #include <signal.h>
  33 #include <stddef.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/select.h>
  38 #include <sys/stat.h>
  39 #include <sys/time.h>
  40 #include <sys/wait.h>
  41 #include <termios.h>
  42 #include <time.h>
  43 #include <unistd.h>
  44 #include <algorithm>
  45 #include <cstring>
  46 #include <iostream>
  47 #include <map>
  48 #include <set>
  49 #include <string>
  50 #include <utility>
  51 #include <vector>
  52
  53 #include <apti18n.h>
  54                                                                         /*}}}*/
  55
  56 using namespace std;
  57
  58 class pkgDPkgPMPrivate
  59 {
  60 public:
  61    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  62                         term_out(NULL), history_out(NULL),
  63                         progress(NULL), master(-1), slave(-1)
  64    {
  65       dpkgbuf[0] = '\0';
  66    }
  67    ~pkgDPkgPMPrivate()
  68    {
  69    }
  70    bool stdin_is_dev_null;
  71    // the buffer we use for the dpkg status-fd reading
  72    char dpkgbuf[1024];
  73    int dpkgbuf_pos;
  74    FILE *term_out;
  75    FILE *history_out;
  76    string dpkg_error;
  77    APT::Progress::PackageManager *progress;
  78
  79    // pty stuff
  80    struct       termios tt;
  81    int master;
  82    int slave;
  83
  84    // signals
  85    sigset_t sigmask;
  86    sigset_t original_sigmask;
  87
  88 };
  89
  90 namespace
  91 {
  92   // Maps the dpkg "processing" info to human readable names.  Entry 0
  93   // of each array is the key, entry 1 is the value.
  94   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  95     std::make_pair("install",   N_("Installing %s")),
  96     std::make_pair("configure", N_("Configuring %s")),
  97     std::make_pair("remove",    N_("Removing %s")),
  98     std::make_pair("purge",    N_("Completely removing %s")),
  99     std::make_pair("disappear", N_("Noting disappearance of %s")),
 100     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
 101   };
 102
 103   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
 104   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
 105
 106   // Predicate to test whether an entry in the PackageProcessingOps
 107   // array matches a string.
 108   class MatchProcessingOp
 109   {
 110     const char *target;
 111
 112   public:
 113     MatchProcessingOp(const char *the_target)
 114       : target(the_target)
 115     {
 116     }
 117
 118     bool operator()(const std::pair<const char *, const char *> &pair) const
 119     {
 120       return strcmp(pair.first, target) == 0;
 121     }
 122   };
 123 }
 124
 125 /* helper function to ionice the given PID
 126
 127  there is no C header for ionice yet - just the syscall interface
 128  so we use the binary from util-linux
 129 */
 130 static bool
 131 ionice(int PID)
 132 {
 133    if (!FileExists("/usr/bin/ionice"))
 134       return false;
 135    pid_t Process = ExecFork();
 136    if (Process == 0)
 137    {
 138       char buf[32];
 139       snprintf(buf, sizeof(buf), "-p%d", PID);
 140       const char *Args[4];
 141       Args[0] = "/usr/bin/ionice";
 142       Args[1] = "-c3";
 143       Args[2] = buf;
 144       Args[3] = 0;
 145       execv(Args[0], (char **)Args);
 146    }
 147    return ExecWait(Process, "ionice");
 148 }
 149
 150 static std::string getDpkgExecutable()
 151 {
 152    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 153    string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 154    size_t dpkgChrootLen = dpkgChrootDir.length();
 155    if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 156    {
 157       if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 158          --dpkgChrootLen;
 159       Tmp = Tmp.substr(dpkgChrootLen);
 160    }
 161    return Tmp;
 162 }
 163
 164 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 165 static void dpkgChrootDirectory()
 166 {
 167    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 168    if (chrootDir == "/")
 169       return;
 170    std::cerr << "Chrooting into " << chrootDir << std::endl;
 171    if (chroot(chrootDir.c_str()) != 0)
 172       _exit(100);
 173    if (chdir("/") != 0)
 174       _exit(100);
 175 }
 176                                                                         /*}}}*/
 177
 178
 179 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 180 // ---------------------------------------------------------------------
 181 /* This is helpful when a package is no longer installed but has residual
 182  * config files
 183  */
 184 static
 185 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 186 {
 187    pkgCache::VerIterator Ver;
 188    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 189    {
 190       pkgCache::VerFileIterator Vf = Ver.FileList();
 191       pkgCache::PkgFileIterator F = Vf.File();
 192       for (F = Vf.File(); F.end() == false; ++F)
 193       {
 194          if (F && F.Archive())
 195          {
 196             if (strcmp(F.Archive(), "now"))
 197                return Ver;
 198          }
 199       }
 200    }
 201    return Ver;
 202 }
 203                                                                         /*}}}*/
 204
 205 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 206 // ---------------------------------------------------------------------
 207 /* */
 208 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 209    : pkgPackageManager(Cache), pkgFailures(0), PackagesDone(0), PackagesTotal(0)
 210 {
 211    d = new pkgDPkgPMPrivate();
 212 }
 213                                                                         /*}}}*/
 214 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 215 // ---------------------------------------------------------------------
 216 /* */
 217 pkgDPkgPM::~pkgDPkgPM()
 218 {
 219    delete d;
 220 }
 221                                                                         /*}}}*/
 222 // DPkgPM::Install - Install a package                                  /*{{{*/
 223 // ---------------------------------------------------------------------
 224 /* Add an install operation to the sequence list */
 225 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 226 {
 227    if (File.empty() == true || Pkg.end() == true)
 228       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 229
 230    // If the filename string begins with DPkg::Chroot-Directory, return the
 231    // substr that is within the chroot so dpkg can access it.
 232    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 233    if (chrootdir != "/" && File.find(chrootdir) == 0)
 234    {
 235       size_t len = chrootdir.length();
 236       if (chrootdir.at(len - 1) == '/')
 237         len--;
 238       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 239    }
 240    else
 241       List.push_back(Item(Item::Install,Pkg,File));
 242
 243    return true;
 244 }
 245                                                                         /*}}}*/
 246 // DPkgPM::Configure - Configure a package                              /*{{{*/
 247 // ---------------------------------------------------------------------
 248 /* Add a configure operation to the sequence list */
 249 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 250 {
 251    if (Pkg.end() == true)
 252       return false;
 253
 254    List.push_back(Item(Item::Configure, Pkg));
 255
 256    // Use triggers for config calls if we configure "smart"
 257    // as otherwise Pre-Depends will not be satisfied, see #526774
 258    if (_config->FindB("DPkg::TriggersPending", false) == true)
 259       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 260
 261    return true;
 262 }
 263                                                                         /*}}}*/
 264 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 265 // ---------------------------------------------------------------------
 266 /* Add a remove operation to the sequence list */
 267 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 268 {
 269    if (Pkg.end() == true)
 270       return false;
 271
 272    if (Purge == true)
 273       List.push_back(Item(Item::Purge,Pkg));
 274    else
 275       List.push_back(Item(Item::Remove,Pkg));
 276    return true;
 277 }
 278                                                                         /*}}}*/
 279 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 280 // ---------------------------------------------------------------------
 281 /* This is part of the helper script communication interface, it sends
 282    very complete information down to the other end of the pipe.*/
 283 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 284 {
 285    return SendPkgsInfo(F, 2);
 286 }
 287 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 288 {
 289    // This version of APT supports only v3, so don't sent higher versions
 290    if (Version <= 3)
 291       fprintf(F,"VERSION %u\n", Version);
 292    else
 293       fprintf(F,"VERSION 3\n");
 294
 295    /* Write out all of the configuration directives by walking the
 296       configuration tree */
 297    const Configuration::Item *Top = _config->Tree(0);
 298    for (; Top != 0;)
 299    {
 300       if (Top->Value.empty() == false)
 301       {
 302          fprintf(F,"%s=%s\n",
 303                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 304                  QuoteString(Top->Value,"\n").c_str());
 305       }
 306
 307       if (Top->Child != 0)
 308       {
 309          Top = Top->Child;
 310          continue;
 311       }
 312
 313       while (Top != 0 && Top->Next == 0)
 314          Top = Top->Parent;
 315       if (Top != 0)
 316          Top = Top->Next;
 317    }
 318    fprintf(F,"\n");
 319
 320    // Write out the package actions in order.
 321    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 322    {
 323       if(I->Pkg.end() == true)
 324          continue;
 325
 326       pkgDepCache::StateCache &S = Cache[I->Pkg];
 327
 328       fprintf(F,"%s ",I->Pkg.Name());
 329
 330       // Current version which we are going to replace
 331       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 332       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 333          CurVer = FindNowVersion(I->Pkg);
 334
 335       if (CurVer.end() == true)
 336       {
 337          if (Version <= 2)
 338             fprintf(F, "- ");
 339          else
 340             fprintf(F, "- - none ");
 341       }
 342       else
 343       {
 344          fprintf(F, "%s ", CurVer.VerStr());
 345          if (Version >= 3)
 346             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 347       }
 348
 349       // Show the compare operator between current and install version
 350       if (S.InstallVer != 0)
 351       {
 352          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 353          int Comp = 2;
 354          if (CurVer.end() == false)
 355             Comp = InstVer.CompareVer(CurVer);
 356          if (Comp < 0)
 357             fprintf(F,"> ");
 358          else if (Comp == 0)
 359             fprintf(F,"= ");
 360          else if (Comp > 0)
 361             fprintf(F,"< ");
 362          fprintf(F, "%s ", InstVer.VerStr());
 363          if (Version >= 3)
 364             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 365       }
 366       else
 367       {
 368          if (Version <= 2)
 369             fprintf(F, "> - ");
 370          else
 371             fprintf(F, "> - - none ");
 372       }
 373
 374       // Show the filename/operation
 375       if (I->Op == Item::Install)
 376       {
 377          // No errors here..
 378          if (I->File[0] != '/')
 379             fprintf(F,"**ERROR**\n");
 380          else
 381             fprintf(F,"%s\n",I->File.c_str());
 382       }
 383       else if (I->Op == Item::Configure)
 384          fprintf(F,"**CONFIGURE**\n");
 385       else if (I->Op == Item::Remove ||
 386           I->Op == Item::Purge)
 387          fprintf(F,"**REMOVE**\n");
 388
 389       if (ferror(F) != 0)
 390          return false;
 391    }
 392    return true;
 393 }
 394                                                                         /*}}}*/
 395 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 396 // ---------------------------------------------------------------------
 397 /* This looks for a list of scripts to run from the configuration file
 398    each one is run and is fed on standard input a list of all .deb files
 399    that are due to be installed. */
 400 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 401 {
 402    Configuration::Item const *Opts = _config->Tree(Cnf);
 403    if (Opts == 0 || Opts->Child == 0)
 404       return true;
 405    Opts = Opts->Child;
 406
 407    unsigned int Count = 1;
 408    for (; Opts != 0; Opts = Opts->Next, Count++)
 409    {
 410       if (Opts->Value.empty() == true)
 411          continue;
 412
 413       // Determine the protocol version
 414       string OptSec = Opts->Value;
 415       string::size_type Pos;
 416       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 417          Pos = OptSec.length();
 418       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 419
 420       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 421       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 422
 423       // Create the pipes
 424       std::set<int> KeepFDs;
 425       MergeKeepFdsFromConfiguration(KeepFDs);
 426       int Pipes[2];
 427       if (pipe(Pipes) != 0)
 428          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 429       if (InfoFD != (unsigned)Pipes[0])
 430          SetCloseExec(Pipes[0],true);
 431       else
 432          KeepFDs.insert(Pipes[0]);
 433
 434
 435       SetCloseExec(Pipes[1],true);
 436
 437       // Purified Fork for running the script
 438       pid_t Process = ExecFork(KeepFDs);
 439       if (Process == 0)
 440       {
 441          // Setup the FDs
 442          dup2(Pipes[0], InfoFD);
 443          SetCloseExec(STDOUT_FILENO,false);
 444          SetCloseExec(STDIN_FILENO,false);
 445          SetCloseExec(STDERR_FILENO,false);
 446
 447          string hookfd;
 448          strprintf(hookfd, "%d", InfoFD);
 449          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 450
 451          dpkgChrootDirectory();
 452          const char *Args[4];
 453          Args[0] = "/bin/sh";
 454          Args[1] = "-c";
 455          Args[2] = Opts->Value.c_str();
 456          Args[3] = 0;
 457          execv(Args[0],(char **)Args);
 458          _exit(100);
 459       }
 460       close(Pipes[0]);
 461       FILE *F = fdopen(Pipes[1],"w");
 462       if (F == 0)
 463          return _error->Errno("fdopen","Faild to open new FD");
 464
 465       // Feed it the filenames.
 466       if (Version <= 1)
 467       {
 468          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 469          {
 470             // Only deal with packages to be installed from .deb
 471             if (I->Op != Item::Install)
 472                continue;
 473
 474             // No errors here..
 475             if (I->File[0] != '/')
 476                continue;
 477
 478             /* Feed the filename of each package that is pending install
 479                into the pipe. */
 480             fprintf(F,"%s\n",I->File.c_str());
 481             if (ferror(F) != 0)
 482                break;
 483          }
 484       }
 485       else
 486          SendPkgsInfo(F, Version);
 487
 488       fclose(F);
 489
 490       // Clean up the sub process
 491       if (ExecWait(Process,Opts->Value.c_str()) == false)
 492          return _error->Error("Failure running script %s",Opts->Value.c_str());
 493    }
 494
 495    return true;
 496 }
 497                                                                         /*}}}*/
 498 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 499 // ---------------------------------------------------------------------
 500 /*
 501 */
 502 void pkgDPkgPM::DoStdin(int master)
 503 {
 504    unsigned char input_buf[256] = {0,};
 505    ssize_t len = read(0, input_buf, sizeof(input_buf));
 506    if (len)
 507       FileFd::Write(master, input_buf, len);
 508    else
 509       d->stdin_is_dev_null = true;
 510 }
 511                                                                         /*}}}*/
 512 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 513 // ---------------------------------------------------------------------
 514 /*
 515  * read the terminal pty and write log
 516  */
 517 void pkgDPkgPM::DoTerminalPty(int master)
 518 {
 519    unsigned char term_buf[1024] = {0,0, };
 520
 521    ssize_t len=read(master, term_buf, sizeof(term_buf));
 522    if(len == -1 && errno == EIO)
 523    {
 524       // this happens when the child is about to exit, we
 525       // give it time to actually exit, otherwise we run
 526       // into a race so we sleep for half a second.
 527       struct timespec sleepfor = { 0, 500000000 };
 528       nanosleep(&sleepfor, NULL);
 529       return;
 530    }
 531    if(len <= 0)
 532       return;
 533    FileFd::Write(1, term_buf, len);
 534    if(d->term_out)
 535       fwrite(term_buf, len, sizeof(char), d->term_out);
 536 }
 537                                                                         /*}}}*/
 538 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 539 // ---------------------------------------------------------------------
 540 /*
 541  */
 542 void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
 543 {
 544    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 545    if (Debug == true)
 546       std::clog << "got from dpkg '" << line << "'" << std::endl;
 547
 548    /* dpkg sends strings like this:
 549       'status:   <pkg>: <pkg  qstate>'
 550       'status:   <pkg>:<arch>: <pkg  qstate>'
 551
 552       'processing: {install,configure,remove,purge,disappear,trigproc}: pkg'
 553       'processing: {install,configure,remove,purge,disappear,trigproc}: trigger'
 554    */
 555
 556    // we need to split on ": " (note the appended space) as the ':' is
 557    // part of the pkgname:arch information that dpkg sends
 558    //
 559    // A dpkg error message may contain additional ":" (like
 560    //  "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 561    // so we need to ensure to not split too much
 562    std::vector<std::string> list = StringSplit(line, ": ", 4);
 563    if(list.size() < 3)
 564    {
 565       if (Debug == true)
 566          std::clog << "ignoring line: not enough ':'" << std::endl;
 567       return;
 568    }
 569
 570    // build the (prefix, pkgname, action) tuple, position of this
 571    // is different for "processing" or "status" messages
 572    std::string prefix = APT::String::Strip(list[0]);
 573    std::string pkgname;
 574    std::string action;
 575
 576    // "processing" has the form "processing: action: pkg or trigger"
 577    // with action = ["install", "configure", "remove", "purge", "disappear",
 578    //                "trigproc"]
 579    if (prefix == "processing")
 580    {
 581       pkgname = APT::String::Strip(list[2]);
 582       action = APT::String::Strip(list[1]);
 583    }
 584    // "status" has the form: "status: pkg: state"
 585    // with state in ["half-installed", "unpacked", "half-configured",
 586    //                "installed", "config-files", "not-installed"]
 587    else if (prefix == "status")
 588    {
 589       pkgname = APT::String::Strip(list[1]);
 590       action = APT::String::Strip(list[2]);
 591    } else {
 592       if (Debug == true)
 593          std::clog << "unknown prefix '" << prefix << "'" << std::endl;
 594       return;
 595    }
 596
 597
 598    /* handle the special cases first:
 599
 600       errors look like this:
 601       '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
 602       and conffile-prompt like this
 603       'status:/etc/compiz.conf/compiz.conf :  conffile-prompt: 'current-conffile' 'new-conffile' useredited distedited
 604    */
 605    if (prefix == "status")
 606    {
 607       if(action == "error")
 608       {
 609          d->progress->Error(list[1], PackagesDone, PackagesTotal,
 610                             list[3]);
 611          pkgFailures++;
 612          WriteApportReport(list[1].c_str(), list[3].c_str());
 613          return;
 614       }
 615       else if(action == "conffile-prompt")
 616       {
 617          d->progress->ConffilePrompt(list[1], PackagesDone, PackagesTotal,
 618                                      list[3]);
 619          return;
 620       }
 621    }
 622
 623    // at this point we know that we should have a valid pkgname, so build all
 624    // the info from it
 625
 626    // dpkg does not send always send "pkgname:arch" so we add it here
 627    // if needed
 628    if (pkgname.find(":") == std::string::npos)
 629    {
 630       // find the package in the group that is in a touched by dpkg
 631       // if there are multiple dpkg will send us a full pkgname:arch
 632       pkgCache::GrpIterator Grp = Cache.FindGrp(pkgname);
 633       if (Grp.end() == false)
 634       {
 635           pkgCache::PkgIterator P = Grp.PackageList();
 636           for (; P.end() != true; P = Grp.NextPkg(P))
 637           {
 638               if(Cache[P].Mode != pkgDepCache::ModeKeep)
 639               {
 640                   pkgname = P.FullName();
 641                   break;
 642               }
 643           }
 644       }
 645    }
 646
 647    const char* const pkg = pkgname.c_str();
 648    std::string short_pkgname = StringSplit(pkgname, ":")[0];
 649    std::string arch = "";
 650    if (pkgname.find(":") != string::npos)
 651       arch = StringSplit(pkgname, ":")[1];
 652    std::string i18n_pkgname = pkgname;
 653    if (arch.size() != 0)
 654       strprintf(i18n_pkgname, "%s (%s)", short_pkgname.c_str(), arch.c_str());
 655
 656    // 'processing' from dpkg looks like
 657    // 'processing: action: pkg'
 658    if(prefix == "processing")
 659    {
 660       const std::pair<const char *, const char *> * const iter =
 661         std::find_if(PackageProcessingOpsBegin,
 662                      PackageProcessingOpsEnd,
 663                      MatchProcessingOp(action.c_str()));
 664       if(iter == PackageProcessingOpsEnd)
 665       {
 666          if (Debug == true)
 667             std::clog << "ignoring unknown action: " << action << std::endl;
 668          return;
 669       }
 670       std::string msg;
 671       strprintf(msg, _(iter->second), i18n_pkgname.c_str());
 672       d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 673
 674       // FIXME: this needs a muliarch testcase
 675       // FIXME2: is "pkgname" here reliable with dpkg only sending us
 676       //         short pkgnames?
 677       if (action == "disappear")
 678          handleDisappearAction(pkgname);
 679       return;
 680    }
 681
 682    if (prefix == "status")
 683    {
 684       vector<struct DpkgState> const &states = PackageOps[pkg];
 685       const char *next_action = NULL;
 686       if(PackageOpsDone[pkg] < states.size())
 687          next_action = states[PackageOpsDone[pkg]].state;
 688       // check if the package moved to the next dpkg state
 689       if(next_action && (action == next_action))
 690       {
 691          // only read the translation if there is actually a next
 692          // action
 693          const char *translation = _(states[PackageOpsDone[pkg]].str);
 694          std::string msg;
 695
 696          // we moved from one dpkg state to a new one, report that
 697          PackageOpsDone[pkg]++;
 698          PackagesDone++;
 699
 700          strprintf(msg, translation, i18n_pkgname.c_str());
 701          d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 702
 703       }
 704       if (Debug == true)
 705          std::clog << "(parsed from dpkg) pkg: " << short_pkgname
 706                    << " action: " << action << endl;
 707    }
 708 }
 709                                                                         /*}}}*/
 710 // DPkgPM::handleDisappearAction                                        /*{{{*/
 711 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 712 {
 713    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 714    if (unlikely(Pkg.end() == true))
 715       return;
 716
 717    // record the package name for display and stuff later
 718    disappearedPkgs.insert(Pkg.FullName(true));
 719
 720    // the disappeared package was auto-installed - nothing to do
 721    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 722       return;
 723    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 724    if (unlikely(PkgVer.end() == true))
 725       return;
 726    /* search in the list of dependencies for (Pre)Depends,
 727       check if this dependency has a Replaces on our package
 728       and if so transfer the manual installed flag to it */
 729    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 730    {
 731       if (Dep->Type != pkgCache::Dep::Depends &&
 732           Dep->Type != pkgCache::Dep::PreDepends)
 733          continue;
 734       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 735       if (unlikely(Tar.end() == true))
 736          continue;
 737       // the package is already marked as manual
 738       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 739          continue;
 740       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 741       if (TarVer.end() == true)
 742          continue;
 743       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 744       {
 745          if (Rep->Type != pkgCache::Dep::Replaces)
 746             continue;
 747          if (Pkg != Rep.TargetPkg())
 748             continue;
 749          // okay, they are strongly connected - transfer manual-bit
 750          if (Debug == true)
 751             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 752          Cache[Tar].Flags &= ~Flag::Auto;
 753          break;
 754       }
 755    }
 756 }
 757                                                                         /*}}}*/
 758 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 759 // ---------------------------------------------------------------------
 760 /*
 761  */
 762 void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
 763 {
 764    char *p, *q;
 765    int len;
 766
 767    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 768    d->dpkgbuf_pos += len;
 769    if(len <= 0)
 770       return;
 771
 772    // process line by line if we have a buffer
 773    p = q = d->dpkgbuf;
 774    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 775    {
 776       *q = 0;
 777       ProcessDpkgStatusLine(p);
 778       p=q+1; // continue with next line
 779    }
 780
 781    // now move the unprocessed bits (after the final \n that is now a 0x0)
 782    // to the start and update d->dpkgbuf_pos
 783    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 784    if(p == NULL)
 785       return;
 786
 787    // we are interessted in the first char *after* 0x0
 788    p++;
 789
 790    // move the unprocessed tail to the start and update pos
 791    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 792    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 793 }
 794                                                                         /*}}}*/
 795 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 796 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 797 {
 798    size_t const length = value.length();
 799    if (length == 0)
 800       return;
 801    // poor mans rstrip(", ")
 802    if (value[length-2] == ',' && value[length-1] == ' ')
 803       value.erase(length - 2, 2);
 804    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 805 }                                                                       /*}}}*/
 806 // DPkgPM::OpenLog                                                      /*{{{*/
 807 bool pkgDPkgPM::OpenLog()
 808 {
 809    string const logdir = _config->FindDir("Dir::Log");
 810    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 811       // FIXME: use a better string after freeze
 812       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 813
 814    // get current time
 815    char timestr[200];
 816    time_t const t = time(NULL);
 817    struct tm const * const tmp = localtime(&t);
 818    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 819
 820    // open terminal log
 821    string const logfile_name = flCombine(logdir,
 822                                    _config->Find("Dir::Log::Terminal"));
 823    if (!logfile_name.empty())
 824    {
 825       d->term_out = fopen(logfile_name.c_str(),"a");
 826       if (d->term_out == NULL)
 827          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 828       setvbuf(d->term_out, NULL, _IONBF, 0);
 829       SetCloseExec(fileno(d->term_out), true);
 830       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 831       {
 832          struct passwd *pw = getpwnam("root");
 833          struct group *gr = getgrnam("adm");
 834          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 835             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 836       }
 837       if (chmod(logfile_name.c_str(), 0640) != 0)
 838          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 839       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 840    }
 841
 842    // write your history
 843    string const history_name = flCombine(logdir,
 844                                    _config->Find("Dir::Log::History"));
 845    if (!history_name.empty())
 846    {
 847       d->history_out = fopen(history_name.c_str(),"a");
 848       if (d->history_out == NULL)
 849          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 850       SetCloseExec(fileno(d->history_out), true);
 851       chmod(history_name.c_str(), 0644);
 852       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 853       string remove, purge, install, reinstall, upgrade, downgrade;
 854       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 855       {
 856          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 857          string *line = NULL;
 858          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 859          if (Cache[I].NewInstall() == true)
 860             HISTORYINFO(install, CANDIDATE_AUTO)
 861          else if (Cache[I].ReInstall() == true)
 862             HISTORYINFO(reinstall, CANDIDATE)
 863          else if (Cache[I].Upgrade() == true)
 864             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 865          else if (Cache[I].Downgrade() == true)
 866             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 867          else if (Cache[I].Delete() == true)
 868             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 869          else
 870             continue;
 871          #undef HISTORYINFO
 872          line->append(I.FullName(false)).append(" (");
 873          switch (infostring) {
 874          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 875          case CANDIDATE_AUTO:
 876             line->append(Cache[I].CandVersion);
 877             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 878                line->append(", automatic");
 879             break;
 880          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 881          case CURRENT: line->append(Cache[I].CurVersion); break;
 882          }
 883          line->append("), ");
 884       }
 885       if (_config->Exists("Commandline::AsString") == true)
 886          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 887       WriteHistoryTag("Install", install);
 888       WriteHistoryTag("Reinstall", reinstall);
 889       WriteHistoryTag("Upgrade", upgrade);
 890       WriteHistoryTag("Downgrade",downgrade);
 891       WriteHistoryTag("Remove",remove);
 892       WriteHistoryTag("Purge",purge);
 893       fflush(d->history_out);
 894    }
 895
 896    return true;
 897 }
 898                                                                         /*}}}*/
 899 // DPkg::CloseLog                                                       /*{{{*/
 900 bool pkgDPkgPM::CloseLog()
 901 {
 902    char timestr[200];
 903    time_t t = time(NULL);
 904    struct tm *tmp = localtime(&t);
 905    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 906
 907    if(d->term_out)
 908    {
 909       fprintf(d->term_out, "Log ended: ");
 910       fprintf(d->term_out, "%s", timestr);
 911       fprintf(d->term_out, "\n");
 912       fclose(d->term_out);
 913    }
 914    d->term_out = NULL;
 915
 916    if(d->history_out)
 917    {
 918       if (disappearedPkgs.empty() == false)
 919       {
 920          string disappear;
 921          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 922               d != disappearedPkgs.end(); ++d)
 923          {
 924             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 925             disappear.append(*d);
 926             if (P.end() == true)
 927                disappear.append(", ");
 928             else
 929                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 930          }
 931          WriteHistoryTag("Disappeared", disappear);
 932       }
 933       if (d->dpkg_error.empty() == false)
 934          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 935       fprintf(d->history_out, "End-Date: %s\n", timestr);
 936       fclose(d->history_out);
 937    }
 938    d->history_out = NULL;
 939
 940    return true;
 941 }
 942                                                                         /*}}}*/
 943                                                                         /*}}}*/
 944 /*{{{*/
 945 // This implements a racy version of pselect for those architectures
 946 // that don't have a working implementation.
 947 // FIXME: Probably can be removed on Lenny+1
 948 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 949    fd_set *exceptfds, const struct timespec *timeout,
 950    const sigset_t *sigmask)
 951 {
 952    sigset_t origmask;
 953    struct timeval tv;
 954    int retval;
 955
 956    tv.tv_sec = timeout->tv_sec;
 957    tv.tv_usec = timeout->tv_nsec/1000;
 958
 959    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 960    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 961    sigprocmask(SIG_SETMASK, &origmask, 0);
 962    return retval;
 963 }
 964                                                                         /*}}}*/
 965
 966 // DPkgPM::BuildPackagesProgressMap                                     /*{{{*/
 967 void pkgDPkgPM::BuildPackagesProgressMap()
 968 {
 969    // map the dpkg states to the operations that are performed
 970    // (this is sorted in the same way as Item::Ops)
 971    static const struct DpkgState DpkgStatesOpMap[][7] = {
 972       // Install operation
 973       {
 974          {"half-installed", N_("Preparing %s")},
 975          {"unpacked", N_("Unpacking %s") },
 976          {NULL, NULL}
 977       },
 978       // Configure operation
 979       {
 980          {"unpacked",N_("Preparing to configure %s") },
 981          {"half-configured", N_("Configuring %s") },
 982          { "installed", N_("Installed %s")},
 983          {NULL, NULL}
 984       },
 985       // Remove operation
 986       {
 987          {"half-configured", N_("Preparing for removal of %s")},
 988          {"half-installed", N_("Removing %s")},
 989          {"config-files",  N_("Removed %s")},
 990          {NULL, NULL}
 991       },
 992       // Purge operation
 993       {
 994          {"config-files", N_("Preparing to completely remove %s")},
 995          {"not-installed", N_("Completely removed %s")},
 996          {NULL, NULL}
 997       },
 998    };
 999
1000    // init the PackageOps map, go over the list of packages that
1001    // that will be [installed|configured|removed|purged] and add
1002    // them to the PackageOps map (the dpkg states it goes through)
1003    // and the PackageOpsTranslations (human readable strings)
1004    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1005    {
1006       if((*I).Pkg.end() == true)
1007          continue;
1008
1009       string const name = (*I).Pkg.FullName();
1010       PackageOpsDone[name] = 0;
1011       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1012       {
1013          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1014          PackagesTotal++;
1015       }
1016    }
1017 }
1018                                                                         /*}}}*/
1019 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR < 13)
1020 bool pkgDPkgPM::Go(int StatusFd)
1021 {
1022    APT::Progress::PackageManager *progress = NULL;
1023    if (StatusFd == -1)
1024       progress = APT::Progress::PackageManagerProgressFactory();
1025    else
1026       progress = new APT::Progress::PackageManagerProgressFd(StatusFd);
1027
1028    return GoNoABIBreak(progress);
1029 }
1030 #endif
1031
1032 void pkgDPkgPM::StartPtyMagic()
1033 {
1034    if (_config->FindB("Dpkg::Use-Pty", true) == false)
1035    {
1036       d->master = d->slave = -1;
1037       return;
1038    }
1039
1040    // setup the pty and stuff
1041    struct       winsize win;
1042
1043    // if tcgetattr does not return zero there was a error
1044    // and we do not do any pty magic
1045    _error->PushToStack();
1046    if (tcgetattr(STDOUT_FILENO, &d->tt) == 0)
1047    {
1048        if (ioctl(1, TIOCGWINSZ, (char *)&win) < 0)
1049        {
1050            _error->Errno("ioctl", _("ioctl(TIOCGWINSZ) failed"));
1051        } else if (openpty(&d->master, &d->slave, NULL, &d->tt, &win) < 0)
1052        {
1053            _error->Errno("openpty", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1054            d->master = d->slave = -1;
1055         } else {
1056             struct termios rtt;
1057             rtt = d->tt;
1058             cfmakeraw(&rtt);
1059             rtt.c_lflag &= ~ECHO;
1060             rtt.c_lflag |= ISIG;
1061             // block SIGTTOU during tcsetattr to prevent a hang if
1062             // the process is a member of the background process group
1063             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1064             sigemptyset(&d->sigmask);
1065             sigaddset(&d->sigmask, SIGTTOU);
1066             sigprocmask(SIG_BLOCK,&d->sigmask, &d->original_sigmask);
1067             tcsetattr(0, TCSAFLUSH, &rtt);
1068             sigprocmask(SIG_SETMASK, &d->original_sigmask, 0);
1069         }
1070       }
1071    // complain only if stdout is either a terminal (but still failed) or is an invalid
1072       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1073       else if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1074          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1075
1076       if (_error->PendingError() == true)
1077          _error->DumpErrors(std::cerr);
1078       _error->RevertToStack();
1079 }
1080
1081 void pkgDPkgPM::StopPtyMagic()
1082 {
1083    if(d->slave > 0)
1084       close(d->slave);
1085    if(d->master >= 0)
1086    {
1087       tcsetattr(0, TCSAFLUSH, &d->tt);
1088       close(d->master);
1089    }
1090 }
1091
1092 // DPkgPM::Go - Run the sequence                                        /*{{{*/
1093 // ---------------------------------------------------------------------
1094 /* This globs the operations and calls dpkg
1095  *
1096  * If it is called with a progress object apt will report the install
1097  * progress to this object. It maps the dpkg states a package goes
1098  * through to human readable (and i10n-able)
1099  * names and calculates a percentage for each step.
1100  */
1101 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
1102 bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
1103 #else
1104 bool pkgDPkgPM::GoNoABIBreak(APT::Progress::PackageManager *progress)
1105 #endif
1106 {
1107    pkgPackageManager::SigINTStop = false;
1108    d->progress = progress;
1109
1110    // Generate the base argument list for dpkg
1111    unsigned long StartSize = 0;
1112    std::vector<const char *> Args;
1113    std::string DpkgExecutable = getDpkgExecutable();
1114    Args.push_back(DpkgExecutable.c_str());
1115    StartSize += DpkgExecutable.length();
1116
1117    // Stick in any custom dpkg options
1118    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
1119    if (Opts != 0)
1120    {
1121       Opts = Opts->Child;
1122       for (; Opts != 0; Opts = Opts->Next)
1123       {
1124          if (Opts->Value.empty() == true)
1125             continue;
1126          Args.push_back(Opts->Value.c_str());
1127          StartSize += Opts->Value.length();
1128       }
1129    }
1130
1131    size_t const BaseArgs = Args.size();
1132    // we need to detect if we can qualify packages with the architecture or not
1133    Args.push_back("--assert-multi-arch");
1134    Args.push_back(NULL);
1135
1136    pid_t dpkgAssertMultiArch = ExecFork();
1137    if (dpkgAssertMultiArch == 0)
1138    {
1139       dpkgChrootDirectory();
1140       // redirect everything to the ultimate sink as we only need the exit-status
1141       int const nullfd = open("/dev/null", O_RDONLY);
1142       dup2(nullfd, STDIN_FILENO);
1143       dup2(nullfd, STDOUT_FILENO);
1144       dup2(nullfd, STDERR_FILENO);
1145       execvp(Args[0], (char**) &Args[0]);
1146       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
1147       _exit(2);
1148    }
1149
1150    fd_set rfds;
1151    struct timespec tv;
1152
1153    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
1154    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
1155    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
1156
1157    if (RunScripts("DPkg::Pre-Invoke") == false)
1158       return false;
1159
1160    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
1161       return false;
1162
1163    // support subpressing of triggers processing for special
1164    // cases like d-i that runs the triggers handling manually
1165    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
1166    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
1167    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
1168       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
1169
1170    // for the progress
1171    BuildPackagesProgressMap();
1172
1173    d->stdin_is_dev_null = false;
1174
1175    // create log
1176    OpenLog();
1177
1178    bool dpkgMultiArch = false;
1179    if (dpkgAssertMultiArch > 0)
1180    {
1181       int Status = 0;
1182       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1183       {
1184          if (errno == EINTR)
1185             continue;
1186          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1187          break;
1188       }
1189       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1190          dpkgMultiArch = true;
1191    }
1192
1193    // start pty magic before the loop
1194    StartPtyMagic();
1195
1196    // Tell the progress that its starting and fork dpkg
1197    d->progress->Start(d->master);
1198
1199    // this loop is runs once per dpkg operation
1200    vector<Item>::const_iterator I = List.begin();
1201    while (I != List.end())
1202    {
1203       // Do all actions with the same Op in one run
1204       vector<Item>::const_iterator J = I;
1205       if (TriggersPending == true)
1206          for (; J != List.end(); ++J)
1207          {
1208             if (J->Op == I->Op)
1209                continue;
1210             if (J->Op != Item::TriggersPending)
1211                break;
1212             vector<Item>::const_iterator T = J + 1;
1213             if (T != List.end() && T->Op == I->Op)
1214                continue;
1215             break;
1216          }
1217       else
1218          for (; J != List.end() && J->Op == I->Op; ++J)
1219             /* nothing */;
1220
1221       // keep track of allocated strings for multiarch package names
1222       std::vector<char *> Packages;
1223
1224       // start with the baseset of arguments
1225       unsigned long Size = StartSize;
1226       Args.erase(Args.begin() + BaseArgs, Args.end());
1227
1228       // Now check if we are within the MaxArgs limit
1229       //
1230       // this code below is problematic, because it may happen that
1231       // the argument list is split in a way that A depends on B
1232       // and they are in the same "--configure A B" run
1233       // - with the split they may now be configured in different
1234       //   runs, using Immediate-Configure-All can help prevent this.
1235       if (J - I > (signed)MaxArgs)
1236       {
1237          J = I + MaxArgs;
1238          unsigned long const size = MaxArgs + 10;
1239          Args.reserve(size);
1240          Packages.reserve(size);
1241       }
1242       else
1243       {
1244          unsigned long const size = (J - I) + 10;
1245          Args.reserve(size);
1246          Packages.reserve(size);
1247       }
1248
1249       int fd[2];
1250       if (pipe(fd) != 0)
1251          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1252
1253 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1254 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1255
1256       ADDARGC("--status-fd");
1257       char status_fd_buf[20];
1258       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1259       ADDARG(status_fd_buf);
1260       unsigned long const Op = I->Op;
1261
1262       switch (I->Op)
1263       {
1264          case Item::Remove:
1265          ADDARGC("--force-depends");
1266          ADDARGC("--force-remove-essential");
1267          ADDARGC("--remove");
1268          break;
1269
1270          case Item::Purge:
1271          ADDARGC("--force-depends");
1272          ADDARGC("--force-remove-essential");
1273          ADDARGC("--purge");
1274          break;
1275
1276          case Item::Configure:
1277          ADDARGC("--configure");
1278          break;
1279
1280          case Item::ConfigurePending:
1281          ADDARGC("--configure");
1282          ADDARGC("--pending");
1283          break;
1284
1285          case Item::TriggersPending:
1286          ADDARGC("--triggers-only");
1287          ADDARGC("--pending");
1288          break;
1289
1290          case Item::Install:
1291          ADDARGC("--unpack");
1292          ADDARGC("--auto-deconfigure");
1293          break;
1294       }
1295
1296       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1297           I->Op != Item::ConfigurePending)
1298       {
1299          ADDARGC("--no-triggers");
1300       }
1301 #undef ADDARGC
1302
1303       // Write in the file or package names
1304       if (I->Op == Item::Install)
1305       {
1306          for (;I != J && Size < MaxArgBytes; ++I)
1307          {
1308             if (I->File[0] != '/')
1309                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1310             Args.push_back(I->File.c_str());
1311             Size += I->File.length();
1312          }
1313       }
1314       else
1315       {
1316          string const nativeArch = _config->Find("APT::Architecture");
1317          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1318          for (;I != J && Size < MaxArgBytes; ++I)
1319          {
1320             if((*I).Pkg.end() == true)
1321                continue;
1322             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.FullName(true)) != disappearedPkgs.end())
1323                continue;
1324             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1325             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1326                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1327                                            strcmp(I->Pkg.Arch(), "none") == 0))
1328             {
1329                char const * const name = I->Pkg.Name();
1330                ADDARG(name);
1331             }
1332             else
1333             {
1334                pkgCache::VerIterator PkgVer;
1335                std::string name = I->Pkg.Name();
1336                if (Op == Item::Remove || Op == Item::Purge)
1337                {
1338                   PkgVer = I->Pkg.CurrentVer();
1339                   if(PkgVer.end() == true)
1340                      PkgVer = FindNowVersion(I->Pkg);
1341                }
1342                else
1343                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1344                if (strcmp(I->Pkg.Arch(), "none") == 0)
1345                   ; // never arch-qualify a package without an arch
1346                else if (PkgVer.end() == false)
1347                   name.append(":").append(PkgVer.Arch());
1348                else
1349                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1350                char * const fullname = strdup(name.c_str());
1351                Packages.push_back(fullname);
1352                ADDARG(fullname);
1353             }
1354          }
1355          // skip configure action if all sheduled packages disappeared
1356          if (oldSize == Size)
1357             continue;
1358       }
1359 #undef ADDARG
1360
1361       J = I;
1362
1363       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1364       {
1365          for (std::vector<const char *>::const_iterator a = Args.begin();
1366               a != Args.end(); ++a)
1367             clog << *a << ' ';
1368          clog << endl;
1369          continue;
1370       }
1371       Args.push_back(NULL);
1372
1373       cout << flush;
1374       clog << flush;
1375       cerr << flush;
1376
1377       /* Mask off sig int/quit. We do this because dpkg also does when
1378          it forks scripts. What happens is that when you hit ctrl-c it sends
1379          it to all processes in the group. Since dpkg ignores the signal
1380          it doesn't die but we do! So we must also ignore it */
1381       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1382       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1383
1384       // Check here for any SIGINT
1385       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1386          break;
1387
1388
1389       // ignore SIGHUP as well (debian #463030)
1390       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1391
1392       // now run dpkg
1393       d->progress->StartDpkg();
1394       std::set<int> KeepFDs;
1395       KeepFDs.insert(fd[1]);
1396       MergeKeepFdsFromConfiguration(KeepFDs);
1397       pid_t Child = ExecFork(KeepFDs);
1398       if (Child == 0)
1399       {
1400          // This is the child
1401          if(d->slave >= 0 && d->master >= 0)
1402          {
1403             setsid();
1404             int res = ioctl(d->slave, TIOCSCTTY, 0);
1405             if (res < 0) {
1406                std::cerr << "ioctl(TIOCSCTTY) failed for fd: "
1407                          << d->slave << std::endl;
1408             } else {
1409                close(d->master);
1410                dup2(d->slave, 0);
1411                dup2(d->slave, 1);
1412                dup2(d->slave, 2);
1413                close(d->slave);
1414             }
1415          }
1416          close(fd[0]); // close the read end of the pipe
1417
1418          dpkgChrootDirectory();
1419
1420          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1421             _exit(100);
1422
1423          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1424          {
1425             int Flags,dummy;
1426             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1427                _exit(100);
1428
1429             // Discard everything in stdin before forking dpkg
1430             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1431                _exit(100);
1432
1433             while (read(STDIN_FILENO,&dummy,1) == 1);
1434
1435             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1436                _exit(100);
1437          }
1438
1439          /* No Job Control Stop Env is a magic dpkg var that prevents it
1440             from using sigstop */
1441          putenv((char *)"DPKG_NO_TSTP=yes");
1442          execvp(Args[0], (char**) &Args[0]);
1443          cerr << "Could not exec dpkg!" << endl;
1444          _exit(100);
1445       }
1446
1447       // apply ionice
1448       if (_config->FindB("DPkg::UseIoNice", false) == true)
1449          ionice(Child);
1450
1451       // Wait for dpkg
1452       int Status = 0;
1453
1454       // we read from dpkg here
1455       int const _dpkgin = fd[0];
1456       close(fd[1]);                        // close the write end of the pipe
1457
1458       // setups fds
1459       sigemptyset(&d->sigmask);
1460       sigprocmask(SIG_BLOCK,&d->sigmask,&d->original_sigmask);
1461
1462       /* free vectors (and therefore memory) as we don't need the included data anymore */
1463       for (std::vector<char *>::const_iterator p = Packages.begin();
1464            p != Packages.end(); ++p)
1465          free(*p);
1466       Packages.clear();
1467
1468       // the result of the waitpid call
1469       int res;
1470       int select_ret;
1471       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1472          if(res < 0) {
1473             // FIXME: move this to a function or something, looks ugly here
1474             // error handling, waitpid returned -1
1475             if (errno == EINTR)
1476                continue;
1477             RunScripts("DPkg::Post-Invoke");
1478
1479             // Restore sig int/quit
1480             signal(SIGQUIT,old_SIGQUIT);
1481             signal(SIGINT,old_SIGINT);
1482
1483             signal(SIGHUP,old_SIGHUP);
1484             return _error->Errno("waitpid","Couldn't wait for subprocess");
1485          }
1486
1487          // wait for input or output here
1488          FD_ZERO(&rfds);
1489          if (d->master >= 0 && !d->stdin_is_dev_null)
1490             FD_SET(0, &rfds);
1491          FD_SET(_dpkgin, &rfds);
1492          if(d->master >= 0)
1493             FD_SET(d->master, &rfds);
1494          tv.tv_sec = 0;
1495          tv.tv_nsec = d->progress->GetPulseInterval();
1496          select_ret = pselect(max(d->master, _dpkgin)+1, &rfds, NULL, NULL,
1497                               &tv, &d->original_sigmask);
1498          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1499             select_ret = racy_pselect(max(d->master, _dpkgin)+1, &rfds, NULL,
1500                                       NULL, &tv, &d->original_sigmask);
1501          d->progress->Pulse();
1502          if (select_ret == 0)
1503             continue;
1504          else if (select_ret < 0 && errno == EINTR)
1505             continue;
1506          else if (select_ret < 0)
1507          {
1508             perror("select() returned error");
1509             continue;
1510          }
1511
1512          if(d->master >= 0 && FD_ISSET(d->master, &rfds))
1513             DoTerminalPty(d->master);
1514          if(d->master >= 0 && FD_ISSET(0, &rfds))
1515             DoStdin(d->master);
1516          if(FD_ISSET(_dpkgin, &rfds))
1517             DoDpkgStatusFd(_dpkgin);
1518       }
1519       close(_dpkgin);
1520
1521       // Restore sig int/quit
1522       signal(SIGQUIT,old_SIGQUIT);
1523       signal(SIGINT,old_SIGINT);
1524
1525       signal(SIGHUP,old_SIGHUP);
1526       // Check for an error code.
1527       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1528       {
1529          // if it was set to "keep-dpkg-runing" then we won't return
1530          // here but keep the loop going and just report it as a error
1531          // for later
1532          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1533
1534          if(stopOnError)
1535             RunScripts("DPkg::Post-Invoke");
1536
1537          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1538             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1539          else if (WIFEXITED(Status) != 0)
1540             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1541          else
1542             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1543
1544          if(d->dpkg_error.size() > 0)
1545             _error->Error("%s", d->dpkg_error.c_str());
1546
1547          if(stopOnError)
1548          {
1549             CloseLog();
1550             StopPtyMagic();
1551             d->progress->Stop();
1552             return false;
1553          }
1554       }
1555    }
1556    // dpkg is done at this point
1557    d->progress->Stop();
1558    StopPtyMagic();
1559    CloseLog();
1560
1561    if (pkgPackageManager::SigINTStop)
1562        _error->Warning(_("Operation was interrupted before it could finish"));
1563
1564    if (RunScripts("DPkg::Post-Invoke") == false)
1565       return false;
1566
1567    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1568    {
1569       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1570       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1571           unlink(oldpkgcache.c_str()) == 0)
1572       {
1573          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1574          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1575          {
1576             _error->PushToStack();
1577             pkgCacheFile CacheFile;
1578             CacheFile.BuildCaches(NULL, true);
1579             _error->RevertToStack();
1580          }
1581       }
1582    }
1583
1584    Cache.writeStateFile(NULL);
1585    return true;
1586 }
1587
1588 void SigINT(int /*sig*/) {
1589    pkgPackageManager::SigINTStop = true;
1590 }
1591                                                                         /*}}}*/
1592 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1593 // ---------------------------------------------------------------------
1594 /* */
1595 void pkgDPkgPM::Reset()
1596 {
1597    List.erase(List.begin(),List.end());
1598 }
1599                                                                         /*}}}*/
1600 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1601 // ---------------------------------------------------------------------
1602 /* */
1603 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1604 {
1605    // If apport doesn't exist or isn't installed do nothing
1606    // This e.g. prevents messages in 'universes' without apport
1607    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1608    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1609       return;
1610
1611    string pkgname, reportfile, srcpkgname, pkgver, arch;
1612    string::size_type pos;
1613    FILE *report;
1614
1615    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1616    {
1617       std::clog << "configured to not write apport reports" << std::endl;
1618       return;
1619    }
1620
1621    // only report the first errors
1622    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1623    {
1624       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1625       return;
1626    }
1627
1628    // check if its not a follow up error
1629    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1630    if(strstr(errormsg, needle) != NULL) {
1631       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1632       return;
1633    }
1634
1635    // do not report disk-full failures
1636    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1637       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1638       return;
1639    }
1640
1641    // do not report out-of-memory failures
1642    if(strstr(errormsg, strerror(ENOMEM)) != NULL ||
1643       strstr(errormsg, "failed to allocate memory") != NULL) {
1644       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1645       return;
1646    }
1647
1648    // do not report bugs regarding inaccessible local files
1649    if(strstr(errormsg, strerror(ENOENT)) != NULL ||
1650       strstr(errormsg, "cannot access archive") != NULL) {
1651       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1652       return;
1653    }
1654
1655    // do not report errors encountered when decompressing packages
1656    if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) {
1657       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1658       return;
1659    }
1660
1661    // do not report dpkg I/O errors, this is a format string, so we compare
1662    // the prefix and the suffix of the error with the dpkg error message
1663    vector<string> io_errors;
1664    io_errors.push_back(string("failed to read on buffer copy for %s"));
1665    io_errors.push_back(string("failed in write on buffer copy for %s"));
1666    io_errors.push_back(string("short read on buffer copy for %s"));
1667
1668    for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); ++I)
1669    {
1670       vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%');
1671       if (list.size() > 1) {
1672          // we need to split %s, VectorizeString only allows char so we need
1673          // to kill the "s" manually
1674          if (list[1].size() > 1) {
1675             list[1].erase(0, 1);
1676             if(strstr(errormsg, list[0].c_str()) &&
1677                strstr(errormsg, list[1].c_str())) {
1678                std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1679                return;
1680             }
1681          }
1682       }
1683    }
1684
1685    // get the pkgname and reportfile
1686    pkgname = flNotDir(pkgpath);
1687    pos = pkgname.find('_');
1688    if(pos != string::npos)
1689       pkgname = pkgname.substr(0, pos);
1690
1691    // find the package versin and source package name
1692    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1693    if (Pkg.end() == true)
1694       return;
1695    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1696    if (Ver.end() == true)
1697       return;
1698    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1699    pkgRecords Recs(Cache);
1700    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1701    srcpkgname = Parse.SourcePkg();
1702    if(srcpkgname.empty())
1703       srcpkgname = pkgname;
1704
1705    // if the file exists already, we check:
1706    // - if it was reported already (touched by apport).
1707    //   If not, we do nothing, otherwise
1708    //    we overwrite it. This is the same behaviour as apport
1709    // - if we have a report with the same pkgversion already
1710    //   then we skip it
1711    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1712    if(FileExists(reportfile))
1713    {
1714       struct stat buf;
1715       char strbuf[255];
1716
1717       // check atime/mtime
1718       stat(reportfile.c_str(), &buf);
1719       if(buf.st_mtime > buf.st_atime)
1720          return;
1721
1722       // check if the existing report is the same version
1723       report = fopen(reportfile.c_str(),"r");
1724       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1725       {
1726          if(strstr(strbuf,"Package:") == strbuf)
1727          {
1728             char pkgname[255], version[255];
1729             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1730                if(strcmp(pkgver.c_str(), version) == 0)
1731                {
1732                   fclose(report);
1733                   return;
1734                }
1735          }
1736       }
1737       fclose(report);
1738    }
1739
1740    // now write the report
1741    arch = _config->Find("APT::Architecture");
1742    report = fopen(reportfile.c_str(),"w");
1743    if(report == NULL)
1744       return;
1745    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1746       chmod(reportfile.c_str(), 0);
1747    else
1748       chmod(reportfile.c_str(), 0600);
1749    fprintf(report, "ProblemType: Package\n");
1750    fprintf(report, "Architecture: %s\n", arch.c_str());
1751    time_t now = time(NULL);
1752    fprintf(report, "Date: %s" , ctime(&now));
1753    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1754    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1755    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1756
1757    // ensure that the log is flushed
1758    if(d->term_out)
1759       fflush(d->term_out);
1760
1761    // attach terminal log it if we have it
1762    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1763    if (!logfile_name.empty())
1764    {
1765       FILE *log = NULL;
1766
1767       fprintf(report, "DpkgTerminalLog:\n");
1768       log = fopen(logfile_name.c_str(),"r");
1769       if(log != NULL)
1770       {
1771          char buf[1024];
1772          while( fgets(buf, sizeof(buf), log) != NULL)
1773             fprintf(report, " %s", buf);
1774          fprintf(report, " \n");
1775          fclose(log);
1776       }
1777    }
1778
1779    // attach history log it if we have it
1780    string histfile_name = _config->FindFile("Dir::Log::History");
1781    if (!histfile_name.empty())
1782    {
1783       fprintf(report, "DpkgHistoryLog:\n");
1784       FILE* log = fopen(histfile_name.c_str(),"r");
1785       if(log != NULL)
1786       {
1787          char buf[1024];
1788          while( fgets(buf, sizeof(buf), log) != NULL)
1789             fprintf(report, " %s", buf);
1790          fclose(log);
1791       }
1792    }
1793
1794    // log the ordering
1795    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1796    fprintf(report, "AptOrdering:\n");
1797    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1798       if ((*I).Pkg != NULL)
1799          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1800       else
1801          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1802
1803    // attach dmesg log (to learn about segfaults)
1804    if (FileExists("/bin/dmesg"))
1805    {
1806       fprintf(report, "Dmesg:\n");
1807       FILE *log = popen("/bin/dmesg","r");
1808       if(log != NULL)
1809       {
1810          char buf[1024];
1811          while( fgets(buf, sizeof(buf), log) != NULL)
1812             fprintf(report, " %s", buf);
1813          pclose(log);
1814       }
1815    }
1816
1817    // attach df -l log (to learn about filesystem status)
1818    if (FileExists("/bin/df"))
1819    {
1820
1821       fprintf(report, "Df:\n");
1822       FILE *log = popen("/bin/df -l","r");
1823       if(log != NULL)
1824       {
1825          char buf[1024];
1826          while( fgets(buf, sizeof(buf), log) != NULL)
1827             fprintf(report, " %s", buf);
1828          pclose(log);
1829       }
1830    }
1831
1832    fclose(report);
1833
1834 }
1835                                                                         /*}}}*/