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