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    bool result = true;
 403
 404    Configuration::Item const *Opts = _config->Tree(Cnf);
 405    if (Opts == 0 || Opts->Child == 0)
 406       return true;
 407    Opts = Opts->Child;
 408
 409    sighandler_t old_sigpipe = signal(SIGPIPE, SIG_IGN);
 410
 411    unsigned int Count = 1;
 412    for (; Opts != 0; Opts = Opts->Next, Count++)
 413    {
 414       if (Opts->Value.empty() == true)
 415          continue;
 416
 417       if(_config->FindB("Debug::RunScripts", false) == true)
 418          std::clog << "Running external script with list of all .deb file: '"
 419                    << Opts->Value << "'" << std::endl;
 420
 421       // Determine the protocol version
 422       string OptSec = Opts->Value;
 423       string::size_type Pos;
 424       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 425          Pos = OptSec.length();
 426       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 427
 428       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 429       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 430
 431       // Create the pipes
 432       std::set<int> KeepFDs;
 433       MergeKeepFdsFromConfiguration(KeepFDs);
 434       int Pipes[2];
 435       if (pipe(Pipes) != 0) {
 436          result = _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 437          break;
 438       }
 439       if (InfoFD != (unsigned)Pipes[0])
 440          SetCloseExec(Pipes[0],true);
 441       else
 442          KeepFDs.insert(Pipes[0]);
 443
 444
 445       SetCloseExec(Pipes[1],true);
 446
 447       // Purified Fork for running the script
 448       pid_t Process = ExecFork(KeepFDs);
 449       if (Process == 0)
 450       {
 451          // Setup the FDs
 452          dup2(Pipes[0], InfoFD);
 453          SetCloseExec(STDOUT_FILENO,false);
 454          SetCloseExec(STDIN_FILENO,false);
 455          SetCloseExec(STDERR_FILENO,false);
 456
 457          string hookfd;
 458          strprintf(hookfd, "%d", InfoFD);
 459          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 460
 461          dpkgChrootDirectory();
 462          const char *Args[4];
 463          Args[0] = "/bin/sh";
 464          Args[1] = "-c";
 465          Args[2] = Opts->Value.c_str();
 466          Args[3] = 0;
 467          execv(Args[0],(char **)Args);
 468          _exit(100);
 469       }
 470       close(Pipes[0]);
 471       FILE *F = fdopen(Pipes[1],"w");
 472       if (F == 0) {
 473          result = _error->Errno("fdopen","Faild to open new FD");
 474          break;
 475       }
 476
 477       // Feed it the filenames.
 478       if (Version <= 1)
 479       {
 480          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 481          {
 482             // Only deal with packages to be installed from .deb
 483             if (I->Op != Item::Install)
 484                continue;
 485
 486             // No errors here..
 487             if (I->File[0] != '/')
 488                continue;
 489
 490             /* Feed the filename of each package that is pending install
 491                into the pipe. */
 492             fprintf(F,"%s\n",I->File.c_str());
 493             if (ferror(F) != 0)
 494                break;
 495          }
 496       }
 497       else
 498          SendPkgsInfo(F, Version);
 499
 500       fclose(F);
 501
 502       // Clean up the sub process
 503       if (ExecWait(Process,Opts->Value.c_str()) == false) {
 504          result = _error->Error("Failure running script %s",Opts->Value.c_str());
 505          break;
 506       }
 507    }
 508    signal(SIGPIPE, old_sigpipe);
 509
 510    return result;
 511 }
 512                                                                         /*}}}*/
 513 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 514 // ---------------------------------------------------------------------
 515 /*
 516 */
 517 void pkgDPkgPM::DoStdin(int master)
 518 {
 519    unsigned char input_buf[256] = {0,};
 520    ssize_t len = read(0, input_buf, sizeof(input_buf));
 521    if (len)
 522       FileFd::Write(master, input_buf, len);
 523    else
 524       d->stdin_is_dev_null = true;
 525 }
 526                                                                         /*}}}*/
 527 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 528 // ---------------------------------------------------------------------
 529 /*
 530  * read the terminal pty and write log
 531  */
 532 void pkgDPkgPM::DoTerminalPty(int master)
 533 {
 534    unsigned char term_buf[1024] = {0,0, };
 535
 536    ssize_t len=read(master, term_buf, sizeof(term_buf));
 537    if(len == -1 && errno == EIO)
 538    {
 539       // this happens when the child is about to exit, we
 540       // give it time to actually exit, otherwise we run
 541       // into a race so we sleep for half a second.
 542       struct timespec sleepfor = { 0, 500000000 };
 543       nanosleep(&sleepfor, NULL);
 544       return;
 545    }
 546    if(len <= 0)
 547       return;
 548    FileFd::Write(1, term_buf, len);
 549    if(d->term_out)
 550       fwrite(term_buf, len, sizeof(char), d->term_out);
 551 }
 552                                                                         /*}}}*/
 553 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 554 // ---------------------------------------------------------------------
 555 /*
 556  */
 557 void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
 558 {
 559    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 560    if (Debug == true)
 561       std::clog << "got from dpkg '" << line << "'" << std::endl;
 562
 563    /* dpkg sends strings like this:
 564       'status:   <pkg>: <pkg  qstate>'
 565       'status:   <pkg>:<arch>: <pkg  qstate>'
 566
 567       'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: pkg'
 568       'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: trigger'
 569    */
 570
 571    // we need to split on ": " (note the appended space) as the ':' is
 572    // part of the pkgname:arch information that dpkg sends
 573    //
 574    // A dpkg error message may contain additional ":" (like
 575    //  "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 576    // so we need to ensure to not split too much
 577    std::vector<std::string> list = StringSplit(line, ": ", 4);
 578    if(list.size() < 3)
 579    {
 580       if (Debug == true)
 581          std::clog << "ignoring line: not enough ':'" << std::endl;
 582       return;
 583    }
 584
 585    // build the (prefix, pkgname, action) tuple, position of this
 586    // is different for "processing" or "status" messages
 587    std::string prefix = APT::String::Strip(list[0]);
 588    std::string pkgname;
 589    std::string action;
 590
 591    // "processing" has the form "processing: action: pkg or trigger"
 592    // with action = ["install", "upgrade", "configure", "remove", "purge",
 593    //                "disappear", "trigproc"]
 594    if (prefix == "processing")
 595    {
 596       pkgname = APT::String::Strip(list[2]);
 597       action = APT::String::Strip(list[1]);
 598       // we don't care for the difference (as dpkg doesn't really either)
 599       if (action == "upgrade")
 600          action = "install";
 601    }
 602    // "status" has the form: "status: pkg: state"
 603    // with state in ["half-installed", "unpacked", "half-configured",
 604    //                "installed", "config-files", "not-installed"]
 605    else if (prefix == "status")
 606    {
 607       pkgname = APT::String::Strip(list[1]);
 608       action = APT::String::Strip(list[2]);
 609    } else {
 610       if (Debug == true)
 611          std::clog << "unknown prefix '" << prefix << "'" << std::endl;
 612       return;
 613    }
 614
 615
 616    /* handle the special cases first:
 617
 618       errors look like this:
 619       '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
 620       and conffile-prompt like this
 621       'status:/etc/compiz.conf/compiz.conf :  conffile-prompt: 'current-conffile' 'new-conffile' useredited distedited
 622    */
 623    if (prefix == "status")
 624    {
 625       if(action == "error")
 626       {
 627          d->progress->Error(pkgname, PackagesDone, PackagesTotal,
 628                             list[3]);
 629          pkgFailures++;
 630          WriteApportReport(pkgname.c_str(), list[3].c_str());
 631          return;
 632       }
 633       else if(action == "conffile-prompt")
 634       {
 635          d->progress->ConffilePrompt(pkgname, PackagesDone, PackagesTotal,
 636                                      list[3]);
 637          return;
 638       }
 639    }
 640
 641    // at this point we know that we should have a valid pkgname, so build all
 642    // the info from it
 643
 644    // dpkg does not always send "pkgname:arch" so we add it here if needed
 645    if (pkgname.find(":") == std::string::npos)
 646    {
 647       // find the package in the group that is touched by dpkg
 648       // if there are multiple pkgs dpkg would send us a full pkgname:arch
 649       pkgCache::GrpIterator Grp = Cache.FindGrp(pkgname);
 650       if (Grp.end() == false)
 651       {
 652          pkgCache::PkgIterator P = Grp.PackageList();
 653          for (; P.end() != true; P = Grp.NextPkg(P))
 654          {
 655             if(Cache[P].Keep() == false || Cache[P].ReInstall() == true)
 656             {
 657                pkgname = P.FullName();
 658                break;
 659             }
 660          }
 661       }
 662    }
 663
 664    const char* const pkg = pkgname.c_str();
 665    std::string short_pkgname = StringSplit(pkgname, ":")[0];
 666    std::string arch = "";
 667    if (pkgname.find(":") != string::npos)
 668       arch = StringSplit(pkgname, ":")[1];
 669    std::string i18n_pkgname = pkgname;
 670    if (arch.size() != 0)
 671       strprintf(i18n_pkgname, "%s (%s)", short_pkgname.c_str(), arch.c_str());
 672
 673    // 'processing' from dpkg looks like
 674    // 'processing: action: pkg'
 675    if(prefix == "processing")
 676    {
 677       const std::pair<const char *, const char *> * const iter =
 678         std::find_if(PackageProcessingOpsBegin,
 679                      PackageProcessingOpsEnd,
 680                      MatchProcessingOp(action.c_str()));
 681       if(iter == PackageProcessingOpsEnd)
 682       {
 683          if (Debug == true)
 684             std::clog << "ignoring unknown action: " << action << std::endl;
 685          return;
 686       }
 687       std::string msg;
 688       strprintf(msg, _(iter->second), i18n_pkgname.c_str());
 689       d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 690
 691       // FIXME: this needs a muliarch testcase
 692       // FIXME2: is "pkgname" here reliable with dpkg only sending us
 693       //         short pkgnames?
 694       if (action == "disappear")
 695          handleDisappearAction(pkgname);
 696       return;
 697    }
 698
 699    if (prefix == "status")
 700    {
 701       vector<struct DpkgState> const &states = PackageOps[pkg];
 702       if(PackageOpsDone[pkg] < states.size())
 703       {
 704          char const * const next_action = states[PackageOpsDone[pkg]].state;
 705          if (next_action && Debug == true)
 706             std::clog << "(parsed from dpkg) pkg: " << short_pkgname
 707                << " action: " << action << " (expected: '" << next_action << "' "
 708                << PackageOpsDone[pkg] << " of " << states.size() << ")" << endl;
 709
 710          // check if the package moved to the next dpkg state
 711          if(next_action && (action == next_action))
 712          {
 713             // only read the translation if there is actually a next action
 714             char const * const translation = _(states[PackageOpsDone[pkg]].str);
 715
 716             // we moved from one dpkg state to a new one, report that
 717             ++PackageOpsDone[pkg];
 718             ++PackagesDone;
 719
 720             std::string msg;
 721             strprintf(msg, translation, i18n_pkgname.c_str());
 722             d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 723          }
 724       }
 725    }
 726 }
 727                                                                         /*}}}*/
 728 // DPkgPM::handleDisappearAction                                        /*{{{*/
 729 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 730 {
 731    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 732    if (unlikely(Pkg.end() == true))
 733       return;
 734
 735    // record the package name for display and stuff later
 736    disappearedPkgs.insert(Pkg.FullName(true));
 737
 738    // the disappeared package was auto-installed - nothing to do
 739    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 740       return;
 741    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 742    if (unlikely(PkgVer.end() == true))
 743       return;
 744    /* search in the list of dependencies for (Pre)Depends,
 745       check if this dependency has a Replaces on our package
 746       and if so transfer the manual installed flag to it */
 747    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 748    {
 749       if (Dep->Type != pkgCache::Dep::Depends &&
 750           Dep->Type != pkgCache::Dep::PreDepends)
 751          continue;
 752       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 753       if (unlikely(Tar.end() == true))
 754          continue;
 755       // the package is already marked as manual
 756       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 757          continue;
 758       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 759       if (TarVer.end() == true)
 760          continue;
 761       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 762       {
 763          if (Rep->Type != pkgCache::Dep::Replaces)
 764             continue;
 765          if (Pkg != Rep.TargetPkg())
 766             continue;
 767          // okay, they are strongly connected - transfer manual-bit
 768          if (Debug == true)
 769             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 770          Cache[Tar].Flags &= ~Flag::Auto;
 771          break;
 772       }
 773    }
 774 }
 775                                                                         /*}}}*/
 776 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 777 // ---------------------------------------------------------------------
 778 /*
 779  */
 780 void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
 781 {
 782    char *p, *q;
 783    int len;
 784
 785    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 786    d->dpkgbuf_pos += len;
 787    if(len <= 0)
 788       return;
 789
 790    // process line by line if we have a buffer
 791    p = q = d->dpkgbuf;
 792    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 793    {
 794       *q = 0;
 795       ProcessDpkgStatusLine(p);
 796       p=q+1; // continue with next line
 797    }
 798
 799    // now move the unprocessed bits (after the final \n that is now a 0x0)
 800    // to the start and update d->dpkgbuf_pos
 801    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 802    if(p == NULL)
 803       return;
 804
 805    // we are interessted in the first char *after* 0x0
 806    p++;
 807
 808    // move the unprocessed tail to the start and update pos
 809    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 810    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 811 }
 812                                                                         /*}}}*/
 813 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 814 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 815 {
 816    size_t const length = value.length();
 817    if (length == 0)
 818       return;
 819    // poor mans rstrip(", ")
 820    if (value[length-2] == ',' && value[length-1] == ' ')
 821       value.erase(length - 2, 2);
 822    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 823 }                                                                       /*}}}*/
 824 // DPkgPM::OpenLog                                                      /*{{{*/
 825 bool pkgDPkgPM::OpenLog()
 826 {
 827    string const logdir = _config->FindDir("Dir::Log");
 828    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 829       // FIXME: use a better string after freeze
 830       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 831
 832    // get current time
 833    char timestr[200];
 834    time_t const t = time(NULL);
 835    struct tm const * const tmp = localtime(&t);
 836    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 837
 838    // open terminal log
 839    string const logfile_name = flCombine(logdir,
 840                                    _config->Find("Dir::Log::Terminal"));
 841    if (!logfile_name.empty())
 842    {
 843       d->term_out = fopen(logfile_name.c_str(),"a");
 844       if (d->term_out == NULL)
 845          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 846       setvbuf(d->term_out, NULL, _IONBF, 0);
 847       SetCloseExec(fileno(d->term_out), true);
 848       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 849       {
 850          struct passwd *pw = getpwnam("root");
 851          struct group *gr = getgrnam("adm");
 852          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 853             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 854       }
 855       if (chmod(logfile_name.c_str(), 0640) != 0)
 856          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 857       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 858    }
 859
 860    // write your history
 861    string const history_name = flCombine(logdir,
 862                                    _config->Find("Dir::Log::History"));
 863    if (!history_name.empty())
 864    {
 865       d->history_out = fopen(history_name.c_str(),"a");
 866       if (d->history_out == NULL)
 867          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 868       SetCloseExec(fileno(d->history_out), true);
 869       chmod(history_name.c_str(), 0644);
 870       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 871       string remove, purge, install, reinstall, upgrade, downgrade;
 872       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 873       {
 874          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 875          string *line = NULL;
 876          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 877          if (Cache[I].NewInstall() == true)
 878             HISTORYINFO(install, CANDIDATE_AUTO)
 879          else if (Cache[I].ReInstall() == true)
 880             HISTORYINFO(reinstall, CANDIDATE)
 881          else if (Cache[I].Upgrade() == true)
 882             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 883          else if (Cache[I].Downgrade() == true)
 884             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 885          else if (Cache[I].Delete() == true)
 886             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 887          else
 888             continue;
 889          #undef HISTORYINFO
 890          line->append(I.FullName(false)).append(" (");
 891          switch (infostring) {
 892          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 893          case CANDIDATE_AUTO:
 894             line->append(Cache[I].CandVersion);
 895             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 896                line->append(", automatic");
 897             break;
 898          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 899          case CURRENT: line->append(Cache[I].CurVersion); break;
 900          }
 901          line->append("), ");
 902       }
 903       if (_config->Exists("Commandline::AsString") == true)
 904          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 905       WriteHistoryTag("Install", install);
 906       WriteHistoryTag("Reinstall", reinstall);
 907       WriteHistoryTag("Upgrade", upgrade);
 908       WriteHistoryTag("Downgrade",downgrade);
 909       WriteHistoryTag("Remove",remove);
 910       WriteHistoryTag("Purge",purge);
 911       fflush(d->history_out);
 912    }
 913
 914    return true;
 915 }
 916                                                                         /*}}}*/
 917 // DPkg::CloseLog                                                       /*{{{*/
 918 bool pkgDPkgPM::CloseLog()
 919 {
 920    char timestr[200];
 921    time_t t = time(NULL);
 922    struct tm *tmp = localtime(&t);
 923    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 924
 925    if(d->term_out)
 926    {
 927       fprintf(d->term_out, "Log ended: ");
 928       fprintf(d->term_out, "%s", timestr);
 929       fprintf(d->term_out, "\n");
 930       fclose(d->term_out);
 931    }
 932    d->term_out = NULL;
 933
 934    if(d->history_out)
 935    {
 936       if (disappearedPkgs.empty() == false)
 937       {
 938          string disappear;
 939          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 940               d != disappearedPkgs.end(); ++d)
 941          {
 942             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 943             disappear.append(*d);
 944             if (P.end() == true)
 945                disappear.append(", ");
 946             else
 947                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 948          }
 949          WriteHistoryTag("Disappeared", disappear);
 950       }
 951       if (d->dpkg_error.empty() == false)
 952          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 953       fprintf(d->history_out, "End-Date: %s\n", timestr);
 954       fclose(d->history_out);
 955    }
 956    d->history_out = NULL;
 957
 958    return true;
 959 }
 960                                                                         /*}}}*/
 961                                                                         /*}}}*/
 962 /*{{{*/
 963 // This implements a racy version of pselect for those architectures
 964 // that don't have a working implementation.
 965 // FIXME: Probably can be removed on Lenny+1
 966 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 967    fd_set *exceptfds, const struct timespec *timeout,
 968    const sigset_t *sigmask)
 969 {
 970    sigset_t origmask;
 971    struct timeval tv;
 972    int retval;
 973
 974    tv.tv_sec = timeout->tv_sec;
 975    tv.tv_usec = timeout->tv_nsec/1000;
 976
 977    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 978    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 979    sigprocmask(SIG_SETMASK, &origmask, 0);
 980    return retval;
 981 }
 982                                                                         /*}}}*/
 983
 984 // DPkgPM::BuildPackagesProgressMap                                     /*{{{*/
 985 void pkgDPkgPM::BuildPackagesProgressMap()
 986 {
 987    // map the dpkg states to the operations that are performed
 988    // (this is sorted in the same way as Item::Ops)
 989    static const struct DpkgState DpkgStatesOpMap[][7] = {
 990       // Install operation
 991       {
 992          {"half-installed", N_("Preparing %s")},
 993          {"unpacked", N_("Unpacking %s") },
 994          {NULL, NULL}
 995       },
 996       // Configure operation
 997       {
 998          {"unpacked",N_("Preparing to configure %s") },
 999          {"half-configured", N_("Configuring %s") },
1000          { "installed", N_("Installed %s")},
1001          {NULL, NULL}
1002       },
1003       // Remove operation
1004       {
1005          {"half-configured", N_("Preparing for removal of %s")},
1006          {"half-installed", N_("Removing %s")},
1007          {"config-files",  N_("Removed %s")},
1008          {NULL, NULL}
1009       },
1010       // Purge operation
1011       {
1012          {"config-files", N_("Preparing to completely remove %s")},
1013          {"not-installed", N_("Completely removed %s")},
1014          {NULL, NULL}
1015       },
1016    };
1017
1018    // init the PackageOps map, go over the list of packages that
1019    // that will be [installed|configured|removed|purged] and add
1020    // them to the PackageOps map (the dpkg states it goes through)
1021    // and the PackageOpsTranslations (human readable strings)
1022    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1023    {
1024       if((*I).Pkg.end() == true)
1025          continue;
1026
1027       string const name = (*I).Pkg.FullName();
1028       PackageOpsDone[name] = 0;
1029       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1030       {
1031          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1032          PackagesTotal++;
1033       }
1034    }
1035 }
1036                                                                         /*}}}*/
1037 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR < 13)
1038 bool pkgDPkgPM::Go(int StatusFd)
1039 {
1040    APT::Progress::PackageManager *progress = NULL;
1041    if (StatusFd == -1)
1042       progress = APT::Progress::PackageManagerProgressFactory();
1043    else
1044       progress = new APT::Progress::PackageManagerProgressFd(StatusFd);
1045
1046    return GoNoABIBreak(progress);
1047 }
1048 #endif
1049
1050 void pkgDPkgPM::StartPtyMagic()
1051 {
1052    if (_config->FindB("Dpkg::Use-Pty", true) == false)
1053    {
1054       d->master = d->slave = -1;
1055       return;
1056    }
1057
1058    // setup the pty and stuff
1059    struct winsize win;
1060
1061    // if tcgetattr for both stdin/stdout returns 0 (no error)
1062    // we do the pty magic
1063    _error->PushToStack();
1064    if (tcgetattr(STDIN_FILENO, &d->tt) == 0 &&
1065        tcgetattr(STDOUT_FILENO, &d->tt) == 0)
1066    {
1067        if (ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&win) < 0)
1068        {
1069            _error->Errno("ioctl", _("ioctl(TIOCGWINSZ) failed"));
1070        } else if (openpty(&d->master, &d->slave, NULL, &d->tt, &win) < 0)
1071        {
1072            _error->Errno("openpty", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1073            d->master = d->slave = -1;
1074         } else {
1075             struct termios rtt;
1076             rtt = d->tt;
1077             cfmakeraw(&rtt);
1078             rtt.c_lflag &= ~ECHO;
1079             rtt.c_lflag |= ISIG;
1080             // block SIGTTOU during tcsetattr to prevent a hang if
1081             // the process is a member of the background process group
1082             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1083             sigemptyset(&d->sigmask);
1084             sigaddset(&d->sigmask, SIGTTOU);
1085             sigprocmask(SIG_BLOCK,&d->sigmask, &d->original_sigmask);
1086             tcsetattr(0, TCSAFLUSH, &rtt);
1087             sigprocmask(SIG_SETMASK, &d->original_sigmask, 0);
1088         }
1089       }
1090    // complain only if stdout is either a terminal (but still failed) or is an invalid
1091       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1092       else if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1093          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1094
1095       if (_error->PendingError() == true)
1096          _error->DumpErrors(std::cerr);
1097       _error->RevertToStack();
1098 }
1099
1100 void pkgDPkgPM::StopPtyMagic()
1101 {
1102    if(d->slave > 0)
1103       close(d->slave);
1104    if(d->master >= 0)
1105    {
1106       tcsetattr(0, TCSAFLUSH, &d->tt);
1107       close(d->master);
1108    }
1109 }
1110
1111 // DPkgPM::Go - Run the sequence                                        /*{{{*/
1112 // ---------------------------------------------------------------------
1113 /* This globs the operations and calls dpkg
1114  *
1115  * If it is called with a progress object apt will report the install
1116  * progress to this object. It maps the dpkg states a package goes
1117  * through to human readable (and i10n-able)
1118  * names and calculates a percentage for each step.
1119  */
1120 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
1121 bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
1122 #else
1123 bool pkgDPkgPM::GoNoABIBreak(APT::Progress::PackageManager *progress)
1124 #endif
1125 {
1126    pkgPackageManager::SigINTStop = false;
1127    d->progress = progress;
1128
1129    // Generate the base argument list for dpkg
1130    unsigned long StartSize = 0;
1131    std::vector<const char *> Args;
1132    std::string DpkgExecutable = getDpkgExecutable();
1133    Args.push_back(DpkgExecutable.c_str());
1134    StartSize += DpkgExecutable.length();
1135
1136    // Stick in any custom dpkg options
1137    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
1138    if (Opts != 0)
1139    {
1140       Opts = Opts->Child;
1141       for (; Opts != 0; Opts = Opts->Next)
1142       {
1143          if (Opts->Value.empty() == true)
1144             continue;
1145          Args.push_back(Opts->Value.c_str());
1146          StartSize += Opts->Value.length();
1147       }
1148    }
1149
1150    size_t const BaseArgs = Args.size();
1151    // we need to detect if we can qualify packages with the architecture or not
1152    Args.push_back("--assert-multi-arch");
1153    Args.push_back(NULL);
1154
1155    pid_t dpkgAssertMultiArch = ExecFork();
1156    if (dpkgAssertMultiArch == 0)
1157    {
1158       dpkgChrootDirectory();
1159       // redirect everything to the ultimate sink as we only need the exit-status
1160       int const nullfd = open("/dev/null", O_RDONLY);
1161       dup2(nullfd, STDIN_FILENO);
1162       dup2(nullfd, STDOUT_FILENO);
1163       dup2(nullfd, STDERR_FILENO);
1164       execvp(Args[0], (char**) &Args[0]);
1165       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
1166       _exit(2);
1167    }
1168
1169    fd_set rfds;
1170    struct timespec tv;
1171
1172    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
1173    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
1174    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
1175
1176    if (RunScripts("DPkg::Pre-Invoke") == false)
1177       return false;
1178
1179    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
1180       return false;
1181
1182    // support subpressing of triggers processing for special
1183    // cases like d-i that runs the triggers handling manually
1184    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
1185    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
1186    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
1187       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
1188
1189    // for the progress
1190    BuildPackagesProgressMap();
1191
1192    d->stdin_is_dev_null = false;
1193
1194    // create log
1195    OpenLog();
1196
1197    bool dpkgMultiArch = false;
1198    if (dpkgAssertMultiArch > 0)
1199    {
1200       int Status = 0;
1201       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1202       {
1203          if (errno == EINTR)
1204             continue;
1205          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1206          break;
1207       }
1208       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1209          dpkgMultiArch = true;
1210    }
1211
1212    // start pty magic before the loop
1213    StartPtyMagic();
1214
1215    // Tell the progress that its starting and fork dpkg
1216    d->progress->Start(d->master);
1217
1218    // this loop is runs once per dpkg operation
1219    vector<Item>::const_iterator I = List.begin();
1220    while (I != List.end())
1221    {
1222       // Do all actions with the same Op in one run
1223       vector<Item>::const_iterator J = I;
1224       if (TriggersPending == true)
1225          for (; J != List.end(); ++J)
1226          {
1227             if (J->Op == I->Op)
1228                continue;
1229             if (J->Op != Item::TriggersPending)
1230                break;
1231             vector<Item>::const_iterator T = J + 1;
1232             if (T != List.end() && T->Op == I->Op)
1233                continue;
1234             break;
1235          }
1236       else
1237          for (; J != List.end() && J->Op == I->Op; ++J)
1238             /* nothing */;
1239
1240       // keep track of allocated strings for multiarch package names
1241       std::vector<char *> Packages;
1242
1243       // start with the baseset of arguments
1244       unsigned long Size = StartSize;
1245       Args.erase(Args.begin() + BaseArgs, Args.end());
1246
1247       // Now check if we are within the MaxArgs limit
1248       //
1249       // this code below is problematic, because it may happen that
1250       // the argument list is split in a way that A depends on B
1251       // and they are in the same "--configure A B" run
1252       // - with the split they may now be configured in different
1253       //   runs, using Immediate-Configure-All can help prevent this.
1254       if (J - I > (signed)MaxArgs)
1255       {
1256          J = I + MaxArgs;
1257          unsigned long const size = MaxArgs + 10;
1258          Args.reserve(size);
1259          Packages.reserve(size);
1260       }
1261       else
1262       {
1263          unsigned long const size = (J - I) + 10;
1264          Args.reserve(size);
1265          Packages.reserve(size);
1266       }
1267
1268       int fd[2];
1269       if (pipe(fd) != 0)
1270          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1271
1272 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1273 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1274
1275       ADDARGC("--status-fd");
1276       char status_fd_buf[20];
1277       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1278       ADDARG(status_fd_buf);
1279       unsigned long const Op = I->Op;
1280
1281       switch (I->Op)
1282       {
1283          case Item::Remove:
1284          ADDARGC("--force-depends");
1285          ADDARGC("--force-remove-essential");
1286          ADDARGC("--remove");
1287          break;
1288
1289          case Item::Purge:
1290          ADDARGC("--force-depends");
1291          ADDARGC("--force-remove-essential");
1292          ADDARGC("--purge");
1293          break;
1294
1295          case Item::Configure:
1296          ADDARGC("--configure");
1297          break;
1298
1299          case Item::ConfigurePending:
1300          ADDARGC("--configure");
1301          ADDARGC("--pending");
1302          break;
1303
1304          case Item::TriggersPending:
1305          ADDARGC("--triggers-only");
1306          ADDARGC("--pending");
1307          break;
1308
1309          case Item::Install:
1310          ADDARGC("--unpack");
1311          ADDARGC("--auto-deconfigure");
1312          break;
1313       }
1314
1315       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1316           I->Op != Item::ConfigurePending)
1317       {
1318          ADDARGC("--no-triggers");
1319       }
1320 #undef ADDARGC
1321
1322       // Write in the file or package names
1323       if (I->Op == Item::Install)
1324       {
1325          for (;I != J && Size < MaxArgBytes; ++I)
1326          {
1327             if (I->File[0] != '/')
1328                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1329             Args.push_back(I->File.c_str());
1330             Size += I->File.length();
1331          }
1332       }
1333       else
1334       {
1335          string const nativeArch = _config->Find("APT::Architecture");
1336          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1337          for (;I != J && Size < MaxArgBytes; ++I)
1338          {
1339             if((*I).Pkg.end() == true)
1340                continue;
1341             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.FullName(true)) != disappearedPkgs.end())
1342                continue;
1343             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1344             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1345                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1346                                            strcmp(I->Pkg.Arch(), "none") == 0))
1347             {
1348                char const * const name = I->Pkg.Name();
1349                ADDARG(name);
1350             }
1351             else
1352             {
1353                pkgCache::VerIterator PkgVer;
1354                std::string name = I->Pkg.Name();
1355                if (Op == Item::Remove || Op == Item::Purge)
1356                {
1357                   PkgVer = I->Pkg.CurrentVer();
1358                   if(PkgVer.end() == true)
1359                      PkgVer = FindNowVersion(I->Pkg);
1360                }
1361                else
1362                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1363                if (strcmp(I->Pkg.Arch(), "none") == 0)
1364                   ; // never arch-qualify a package without an arch
1365                else if (PkgVer.end() == false)
1366                   name.append(":").append(PkgVer.Arch());
1367                else
1368                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1369                char * const fullname = strdup(name.c_str());
1370                Packages.push_back(fullname);
1371                ADDARG(fullname);
1372             }
1373          }
1374          // skip configure action if all sheduled packages disappeared
1375          if (oldSize == Size)
1376             continue;
1377       }
1378 #undef ADDARG
1379
1380       J = I;
1381
1382       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1383       {
1384          for (std::vector<const char *>::const_iterator a = Args.begin();
1385               a != Args.end(); ++a)
1386             clog << *a << ' ';
1387          clog << endl;
1388          continue;
1389       }
1390       Args.push_back(NULL);
1391
1392       cout << flush;
1393       clog << flush;
1394       cerr << flush;
1395
1396       /* Mask off sig int/quit. We do this because dpkg also does when
1397          it forks scripts. What happens is that when you hit ctrl-c it sends
1398          it to all processes in the group. Since dpkg ignores the signal
1399          it doesn't die but we do! So we must also ignore it */
1400       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1401       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1402
1403       // Check here for any SIGINT
1404       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1405          break;
1406
1407
1408       // ignore SIGHUP as well (debian #463030)
1409       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1410
1411       // now run dpkg
1412       d->progress->StartDpkg();
1413       std::set<int> KeepFDs;
1414       KeepFDs.insert(fd[1]);
1415       MergeKeepFdsFromConfiguration(KeepFDs);
1416       pid_t Child = ExecFork(KeepFDs);
1417       if (Child == 0)
1418       {
1419          // This is the child
1420          if(d->slave >= 0 && d->master >= 0)
1421          {
1422             setsid();
1423             int res = ioctl(d->slave, TIOCSCTTY, 0);
1424             if (res < 0) {
1425                std::cerr << "ioctl(TIOCSCTTY) failed for fd: "
1426                          << d->slave << std::endl;
1427             } else {
1428                close(d->master);
1429                dup2(d->slave, 0);
1430                dup2(d->slave, 1);
1431                dup2(d->slave, 2);
1432                close(d->slave);
1433             }
1434          }
1435          close(fd[0]); // close the read end of the pipe
1436
1437          dpkgChrootDirectory();
1438
1439          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1440             _exit(100);
1441
1442          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1443          {
1444             int Flags;
1445             int dummy = 0;
1446             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1447                _exit(100);
1448
1449             // Discard everything in stdin before forking dpkg
1450             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1451                _exit(100);
1452
1453             while (read(STDIN_FILENO,&dummy,1) == 1);
1454
1455             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1456                _exit(100);
1457          }
1458
1459          /* No Job Control Stop Env is a magic dpkg var that prevents it
1460             from using sigstop */
1461          putenv((char *)"DPKG_NO_TSTP=yes");
1462          execvp(Args[0], (char**) &Args[0]);
1463          cerr << "Could not exec dpkg!" << endl;
1464          _exit(100);
1465       }
1466
1467       // apply ionice
1468       if (_config->FindB("DPkg::UseIoNice", false) == true)
1469          ionice(Child);
1470
1471       // Wait for dpkg
1472       int Status = 0;
1473
1474       // we read from dpkg here
1475       int const _dpkgin = fd[0];
1476       close(fd[1]);                        // close the write end of the pipe
1477
1478       // setups fds
1479       sigemptyset(&d->sigmask);
1480       sigprocmask(SIG_BLOCK,&d->sigmask,&d->original_sigmask);
1481
1482       /* free vectors (and therefore memory) as we don't need the included data anymore */
1483       for (std::vector<char *>::const_iterator p = Packages.begin();
1484            p != Packages.end(); ++p)
1485          free(*p);
1486       Packages.clear();
1487
1488       // the result of the waitpid call
1489       int res;
1490       int select_ret;
1491       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1492          if(res < 0) {
1493             // FIXME: move this to a function or something, looks ugly here
1494             // error handling, waitpid returned -1
1495             if (errno == EINTR)
1496                continue;
1497             RunScripts("DPkg::Post-Invoke");
1498
1499             // Restore sig int/quit
1500             signal(SIGQUIT,old_SIGQUIT);
1501             signal(SIGINT,old_SIGINT);
1502
1503             signal(SIGHUP,old_SIGHUP);
1504             return _error->Errno("waitpid","Couldn't wait for subprocess");
1505          }
1506
1507          // wait for input or output here
1508          FD_ZERO(&rfds);
1509          if (d->master >= 0 && !d->stdin_is_dev_null)
1510             FD_SET(0, &rfds);
1511          FD_SET(_dpkgin, &rfds);
1512          if(d->master >= 0)
1513             FD_SET(d->master, &rfds);
1514          tv.tv_sec = 0;
1515          tv.tv_nsec = d->progress->GetPulseInterval();
1516          select_ret = pselect(max(d->master, _dpkgin)+1, &rfds, NULL, NULL,
1517                               &tv, &d->original_sigmask);
1518          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1519             select_ret = racy_pselect(max(d->master, _dpkgin)+1, &rfds, NULL,
1520                                       NULL, &tv, &d->original_sigmask);
1521          d->progress->Pulse();
1522          if (select_ret == 0)
1523             continue;
1524          else if (select_ret < 0 && errno == EINTR)
1525             continue;
1526          else if (select_ret < 0)
1527          {
1528             perror("select() returned error");
1529             continue;
1530          }
1531
1532          if(d->master >= 0 && FD_ISSET(d->master, &rfds))
1533             DoTerminalPty(d->master);
1534          if(d->master >= 0 && FD_ISSET(0, &rfds))
1535             DoStdin(d->master);
1536          if(FD_ISSET(_dpkgin, &rfds))
1537             DoDpkgStatusFd(_dpkgin);
1538       }
1539       close(_dpkgin);
1540
1541       // Restore sig int/quit
1542       signal(SIGQUIT,old_SIGQUIT);
1543       signal(SIGINT,old_SIGINT);
1544
1545       signal(SIGHUP,old_SIGHUP);
1546       // Check for an error code.
1547       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1548       {
1549          // if it was set to "keep-dpkg-runing" then we won't return
1550          // here but keep the loop going and just report it as a error
1551          // for later
1552          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1553
1554          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1555             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1556          else if (WIFEXITED(Status) != 0)
1557             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1558          else
1559             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1560          _error->Error("%s", d->dpkg_error.c_str());
1561
1562          if(stopOnError)
1563             break;
1564       }
1565    }
1566    // dpkg is done at this point
1567    d->progress->Stop();
1568    StopPtyMagic();
1569    CloseLog();
1570
1571    if (pkgPackageManager::SigINTStop)
1572        _error->Warning(_("Operation was interrupted before it could finish"));
1573
1574    if (RunScripts("DPkg::Post-Invoke") == false)
1575       return false;
1576
1577    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1578    {
1579       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1580       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1581           unlink(oldpkgcache.c_str()) == 0)
1582       {
1583          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1584          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1585          {
1586             _error->PushToStack();
1587             pkgCacheFile CacheFile;
1588             CacheFile.BuildCaches(NULL, true);
1589             _error->RevertToStack();
1590          }
1591       }
1592    }
1593
1594    Cache.writeStateFile(NULL);
1595    return d->dpkg_error.empty();
1596 }
1597
1598 void SigINT(int /*sig*/) {
1599    pkgPackageManager::SigINTStop = true;
1600 }
1601                                                                         /*}}}*/
1602 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1603 // ---------------------------------------------------------------------
1604 /* */
1605 void pkgDPkgPM::Reset()
1606 {
1607    List.erase(List.begin(),List.end());
1608 }
1609                                                                         /*}}}*/
1610 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1611 // ---------------------------------------------------------------------
1612 /* */
1613 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1614 {
1615    // If apport doesn't exist or isn't installed do nothing
1616    // This e.g. prevents messages in 'universes' without apport
1617    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1618    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1619       return;
1620
1621    string pkgname, reportfile, srcpkgname, pkgver, arch;
1622    string::size_type pos;
1623    FILE *report;
1624
1625    if (_config->FindB("Dpkg::ApportFailureReport", true) == false)
1626    {
1627       std::clog << "configured to not write apport reports" << std::endl;
1628       return;
1629    }
1630
1631    // only report the first errors
1632    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1633    {
1634       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1635       return;
1636    }
1637
1638    // check if its not a follow up error
1639    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1640    if(strstr(errormsg, needle) != NULL) {
1641       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1642       return;
1643    }
1644
1645    // do not report disk-full failures
1646    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1647       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1648       return;
1649    }
1650
1651    // do not report out-of-memory failures
1652    if(strstr(errormsg, strerror(ENOMEM)) != NULL ||
1653       strstr(errormsg, "failed to allocate memory") != NULL) {
1654       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1655       return;
1656    }
1657
1658    // do not report bugs regarding inaccessible local files
1659    if(strstr(errormsg, strerror(ENOENT)) != NULL ||
1660       strstr(errormsg, "cannot access archive") != NULL) {
1661       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1662       return;
1663    }
1664
1665    // do not report errors encountered when decompressing packages
1666    if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) {
1667       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1668       return;
1669    }
1670
1671    // do not report dpkg I/O errors, this is a format string, so we compare
1672    // the prefix and the suffix of the error with the dpkg error message
1673    vector<string> io_errors;
1674    io_errors.push_back(string("failed to read"));
1675    io_errors.push_back(string("failed to write"));
1676    io_errors.push_back(string("failed to seek"));
1677    io_errors.push_back(string("unexpected end of file or stream"));
1678
1679    for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); ++I)
1680    {
1681       vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%');
1682       if (list.size() > 1) {
1683          // we need to split %s, VectorizeString only allows char so we need
1684          // to kill the "s" manually
1685          if (list[1].size() > 1) {
1686             list[1].erase(0, 1);
1687             if(strstr(errormsg, list[0].c_str()) &&
1688                strstr(errormsg, list[1].c_str())) {
1689                std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1690                return;
1691             }
1692          }
1693       }
1694    }
1695
1696    // get the pkgname and reportfile
1697    pkgname = flNotDir(pkgpath);
1698    pos = pkgname.find('_');
1699    if(pos != string::npos)
1700       pkgname = pkgname.substr(0, pos);
1701
1702    // find the package versin and source package name
1703    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1704    if (Pkg.end() == true)
1705       return;
1706    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1707    if (Ver.end() == true)
1708       return;
1709    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1710    pkgRecords Recs(Cache);
1711    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1712    srcpkgname = Parse.SourcePkg();
1713    if(srcpkgname.empty())
1714       srcpkgname = pkgname;
1715
1716    // if the file exists already, we check:
1717    // - if it was reported already (touched by apport).
1718    //   If not, we do nothing, otherwise
1719    //    we overwrite it. This is the same behaviour as apport
1720    // - if we have a report with the same pkgversion already
1721    //   then we skip it
1722    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1723    if(FileExists(reportfile))
1724    {
1725       struct stat buf;
1726       char strbuf[255];
1727
1728       // check atime/mtime
1729       stat(reportfile.c_str(), &buf);
1730       if(buf.st_mtime > buf.st_atime)
1731          return;
1732
1733       // check if the existing report is the same version
1734       report = fopen(reportfile.c_str(),"r");
1735       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1736       {
1737          if(strstr(strbuf,"Package:") == strbuf)
1738          {
1739             char pkgname[255], version[255];
1740             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1741                if(strcmp(pkgver.c_str(), version) == 0)
1742                {
1743                   fclose(report);
1744                   return;
1745                }
1746          }
1747       }
1748       fclose(report);
1749    }
1750
1751    // now write the report
1752    arch = _config->Find("APT::Architecture");
1753    report = fopen(reportfile.c_str(),"w");
1754    if(report == NULL)
1755       return;
1756    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1757       chmod(reportfile.c_str(), 0);
1758    else
1759       chmod(reportfile.c_str(), 0600);
1760    fprintf(report, "ProblemType: Package\n");
1761    fprintf(report, "Architecture: %s\n", arch.c_str());
1762    time_t now = time(NULL);
1763    fprintf(report, "Date: %s" , ctime(&now));
1764    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1765    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1766    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1767
1768    // ensure that the log is flushed
1769    if(d->term_out)
1770       fflush(d->term_out);
1771
1772    // attach terminal log it if we have it
1773    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1774    if (!logfile_name.empty())
1775    {
1776       FILE *log = NULL;
1777
1778       fprintf(report, "DpkgTerminalLog:\n");
1779       log = fopen(logfile_name.c_str(),"r");
1780       if(log != NULL)
1781       {
1782          char buf[1024];
1783          while( fgets(buf, sizeof(buf), log) != NULL)
1784             fprintf(report, " %s", buf);
1785          fprintf(report, " \n");
1786          fclose(log);
1787       }
1788    }
1789
1790    // attach history log it if we have it
1791    string histfile_name = _config->FindFile("Dir::Log::History");
1792    if (!histfile_name.empty())
1793    {
1794       fprintf(report, "DpkgHistoryLog:\n");
1795       FILE* log = fopen(histfile_name.c_str(),"r");
1796       if(log != NULL)
1797       {
1798          char buf[1024];
1799          while( fgets(buf, sizeof(buf), log) != NULL)
1800             fprintf(report, " %s", buf);
1801          fclose(log);
1802       }
1803    }
1804
1805    // log the ordering
1806    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1807    fprintf(report, "AptOrdering:\n");
1808    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1809       if ((*I).Pkg != NULL)
1810          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1811       else
1812          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1813
1814    // attach dmesg log (to learn about segfaults)
1815    if (FileExists("/bin/dmesg"))
1816    {
1817       fprintf(report, "Dmesg:\n");
1818       FILE *log = popen("/bin/dmesg","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    // attach df -l log (to learn about filesystem status)
1829    if (FileExists("/bin/df"))
1830    {
1831
1832       fprintf(report, "Df:\n");
1833       FILE *log = popen("/bin/df -l","r");
1834       if(log != NULL)
1835       {
1836          char buf[1024];
1837          while( fgets(buf, sizeof(buf), log) != NULL)
1838             fprintf(report, " %s", buf);
1839          pclose(log);
1840       }
1841    }
1842
1843    fclose(report);
1844
1845 }
1846                                                                         /*}}}*/