apt-pkg/deb/dpkgpm.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
   4 /* ######################################################################
   5
   6    DPKG Package Manager - Provide an interface to dpkg
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include <config.h>
  12
  13 #include <apt-pkg/dpkgpm.h>
  14 #include <apt-pkg/error.h>
  15 #include <apt-pkg/configuration.h>
  16 #include <apt-pkg/depcache.h>
  17 #include <apt-pkg/pkgrecords.h>
  18 #include <apt-pkg/strutl.h>
  19 #include <apt-pkg/fileutl.h>
  20 #include <apt-pkg/cachefile.h>
  21 #include <apt-pkg/packagemanager.h>
  22
  23 #include <unistd.h>
  24 #include <stdlib.h>
  25 #include <fcntl.h>
  26 #include <sys/select.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <sys/wait.h>
  30 #include <signal.h>
  31 #include <errno.h>
  32 #include <string.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <algorithm>
  36 #include <sstream>
  37 #include <map>
  38 #include <pwd.h>
  39 #include <grp.h>
  40 #include <iomanip>
  41
  42 #include <termios.h>
  43 #include <unistd.h>
  44 #include <sys/ioctl.h>
  45 #include <pty.h>
  46
  47 #include <apti18n.h>
  48                                                                         /*}}}*/
  49
  50 using namespace std;
  51
  52 class pkgDPkgPMPrivate
  53 {
  54 public:
  55    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  56                         term_out(NULL), history_out(NULL),
  57                         last_reported_progress(0.0)
  58    {
  59       dpkgbuf[0] = '\0';
  60    }
  61    bool stdin_is_dev_null;
  62    // the buffer we use for the dpkg status-fd reading
  63    char dpkgbuf[1024];
  64    int dpkgbuf_pos;
  65    FILE *term_out;
  66    FILE *history_out;
  67    string dpkg_error;
  68
  69    float last_reported_progress;
  70 };
  71
  72 namespace
  73 {
  74   // Maps the dpkg "processing" info to human readable names.  Entry 0
  75   // of each array is the key, entry 1 is the value.
  76   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  77     std::make_pair("install",   N_("Installing %s")),
  78     std::make_pair("configure", N_("Configuring %s")),
  79     std::make_pair("remove",    N_("Removing %s")),
  80     std::make_pair("purge",    N_("Completely removing %s")),
  81     std::make_pair("disappear", N_("Noting disappearance of %s")),
  82     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  83   };
  84
  85   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  86   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  87
  88   // Predicate to test whether an entry in the PackageProcessingOps
  89   // array matches a string.
  90   class MatchProcessingOp
  91   {
  92     const char *target;
  93
  94   public:
  95     MatchProcessingOp(const char *the_target)
  96       : target(the_target)
  97     {
  98     }
  99
 100     bool operator()(const std::pair<const char *, const char *> &pair) const
 101     {
 102       return strcmp(pair.first, target) == 0;
 103     }
 104   };
 105 }
 106
 107 /* helper function to ionice the given PID
 108
 109  there is no C header for ionice yet - just the syscall interface
 110  so we use the binary from util-linux
 111 */
 112 static bool
 113 ionice(int PID)
 114 {
 115    if (!FileExists("/usr/bin/ionice"))
 116       return false;
 117    pid_t Process = ExecFork();
 118    if (Process == 0)
 119    {
 120       char buf[32];
 121       snprintf(buf, sizeof(buf), "-p%d", PID);
 122       const char *Args[4];
 123       Args[0] = "/usr/bin/ionice";
 124       Args[1] = "-c3";
 125       Args[2] = buf;
 126       Args[3] = 0;
 127       execv(Args[0], (char **)Args);
 128    }
 129    return ExecWait(Process, "ionice");
 130 }
 131
 132 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 133 static void dpkgChrootDirectory()
 134 {
 135    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 136    if (chrootDir == "/")
 137       return;
 138    std::cerr << "Chrooting into " << chrootDir << std::endl;
 139    if (chroot(chrootDir.c_str()) != 0)
 140       _exit(100);
 141    if (chdir("/") != 0)
 142       _exit(100);
 143 }
 144                                                                         /*}}}*/
 145
 146
 147 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 148 // ---------------------------------------------------------------------
 149 /* This is helpful when a package is no longer installed but has residual
 150  * config files
 151  */
 152 static
 153 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 154 {
 155    pkgCache::VerIterator Ver;
 156    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 157    {
 158       pkgCache::VerFileIterator Vf = Ver.FileList();
 159       pkgCache::PkgFileIterator F = Vf.File();
 160       for (F = Vf.File(); F.end() == false; ++F)
 161       {
 162          if (F && F.Archive())
 163          {
 164             if (strcmp(F.Archive(), "now"))
 165                return Ver;
 166          }
 167       }
 168    }
 169    return Ver;
 170 }
 171                                                                         /*}}}*/
 172
 173 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 174 // ---------------------------------------------------------------------
 175 /* */
 176 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 177    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 178 {
 179    d = new pkgDPkgPMPrivate();
 180 }
 181                                                                         /*}}}*/
 182 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 183 // ---------------------------------------------------------------------
 184 /* */
 185 pkgDPkgPM::~pkgDPkgPM()
 186 {
 187    delete d;
 188 }
 189                                                                         /*}}}*/
 190 // DPkgPM::Install - Install a package                                  /*{{{*/
 191 // ---------------------------------------------------------------------
 192 /* Add an install operation to the sequence list */
 193 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 194 {
 195    if (File.empty() == true || Pkg.end() == true)
 196       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 197
 198    // If the filename string begins with DPkg::Chroot-Directory, return the
 199    // substr that is within the chroot so dpkg can access it.
 200    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 201    if (chrootdir != "/" && File.find(chrootdir) == 0)
 202    {
 203       size_t len = chrootdir.length();
 204       if (chrootdir.at(len - 1) == '/')
 205         len--;
 206       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 207    }
 208    else
 209       List.push_back(Item(Item::Install,Pkg,File));
 210
 211    return true;
 212 }
 213                                                                         /*}}}*/
 214 // DPkgPM::Configure - Configure a package                              /*{{{*/
 215 // ---------------------------------------------------------------------
 216 /* Add a configure operation to the sequence list */
 217 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 218 {
 219    if (Pkg.end() == true)
 220       return false;
 221
 222    List.push_back(Item(Item::Configure, Pkg));
 223
 224    // Use triggers for config calls if we configure "smart"
 225    // as otherwise Pre-Depends will not be satisfied, see #526774
 226    if (_config->FindB("DPkg::TriggersPending", false) == true)
 227       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 228
 229    return true;
 230 }
 231                                                                         /*}}}*/
 232 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 233 // ---------------------------------------------------------------------
 234 /* Add a remove operation to the sequence list */
 235 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 236 {
 237    if (Pkg.end() == true)
 238       return false;
 239
 240    if (Purge == true)
 241       List.push_back(Item(Item::Purge,Pkg));
 242    else
 243       List.push_back(Item(Item::Remove,Pkg));
 244    return true;
 245 }
 246                                                                         /*}}}*/
 247 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 248 // ---------------------------------------------------------------------
 249 /* This is part of the helper script communication interface, it sends
 250    very complete information down to the other end of the pipe.*/
 251 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 252 {
 253    return SendPkgsInfo(F, 2);
 254 }
 255 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 256 {
 257    // This version of APT supports only v3, so don't sent higher versions
 258    if (Version <= 3)
 259       fprintf(F,"VERSION %u\n", Version);
 260    else
 261       fprintf(F,"VERSION 3\n");
 262
 263    /* Write out all of the configuration directives by walking the
 264       configuration tree */
 265    const Configuration::Item *Top = _config->Tree(0);
 266    for (; Top != 0;)
 267    {
 268       if (Top->Value.empty() == false)
 269       {
 270          fprintf(F,"%s=%s\n",
 271                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 272                  QuoteString(Top->Value,"\n").c_str());
 273       }
 274
 275       if (Top->Child != 0)
 276       {
 277          Top = Top->Child;
 278          continue;
 279       }
 280
 281       while (Top != 0 && Top->Next == 0)
 282          Top = Top->Parent;
 283       if (Top != 0)
 284          Top = Top->Next;
 285    }
 286    fprintf(F,"\n");
 287
 288    // Write out the package actions in order.
 289    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 290    {
 291       if(I->Pkg.end() == true)
 292          continue;
 293
 294       pkgDepCache::StateCache &S = Cache[I->Pkg];
 295
 296       fprintf(F,"%s ",I->Pkg.Name());
 297
 298       // Current version which we are going to replace
 299       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 300       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 301          CurVer = FindNowVersion(I->Pkg);
 302
 303       if (CurVer.end() == true)
 304       {
 305          if (Version <= 2)
 306             fprintf(F, "- ");
 307          else
 308             fprintf(F, "- - none ");
 309       }
 310       else
 311       {
 312          fprintf(F, "%s ", CurVer.VerStr());
 313          if (Version >= 3)
 314             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 315       }
 316
 317       // Show the compare operator between current and install version
 318       if (S.InstallVer != 0)
 319       {
 320          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 321          int Comp = 2;
 322          if (CurVer.end() == false)
 323             Comp = InstVer.CompareVer(CurVer);
 324          if (Comp < 0)
 325             fprintf(F,"> ");
 326          else if (Comp == 0)
 327             fprintf(F,"= ");
 328          else if (Comp > 0)
 329             fprintf(F,"< ");
 330          fprintf(F, "%s ", InstVer.VerStr());
 331          if (Version >= 3)
 332             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 333       }
 334       else
 335       {
 336          if (Version <= 2)
 337             fprintf(F, "> - ");
 338          else
 339             fprintf(F, "> - - none ");
 340       }
 341
 342       // Show the filename/operation
 343       if (I->Op == Item::Install)
 344       {
 345          // No errors here..
 346          if (I->File[0] != '/')
 347             fprintf(F,"**ERROR**\n");
 348          else
 349             fprintf(F,"%s\n",I->File.c_str());
 350       }
 351       else if (I->Op == Item::Configure)
 352          fprintf(F,"**CONFIGURE**\n");
 353       else if (I->Op == Item::Remove ||
 354           I->Op == Item::Purge)
 355          fprintf(F,"**REMOVE**\n");
 356
 357       if (ferror(F) != 0)
 358          return false;
 359    }
 360    return true;
 361 }
 362                                                                         /*}}}*/
 363 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 364 // ---------------------------------------------------------------------
 365 /* This looks for a list of scripts to run from the configuration file
 366    each one is run and is fed on standard input a list of all .deb files
 367    that are due to be installed. */
 368 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 369 {
 370    Configuration::Item const *Opts = _config->Tree(Cnf);
 371    if (Opts == 0 || Opts->Child == 0)
 372       return true;
 373    Opts = Opts->Child;
 374
 375    unsigned int Count = 1;
 376    for (; Opts != 0; Opts = Opts->Next, Count++)
 377    {
 378       if (Opts->Value.empty() == true)
 379          continue;
 380
 381       // Determine the protocol version
 382       string OptSec = Opts->Value;
 383       string::size_type Pos;
 384       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 385          Pos = OptSec.length();
 386       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 387
 388       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 389       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 390
 391       // Create the pipes
 392       int Pipes[2];
 393       if (pipe(Pipes) != 0)
 394          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 395       if (InfoFD != (unsigned)Pipes[0])
 396          SetCloseExec(Pipes[0],true);
 397       else
 398          _config->Set("APT::Keep-Fds::", Pipes[0]);
 399       SetCloseExec(Pipes[1],true);
 400
 401       // Purified Fork for running the script
 402       pid_t Process = ExecFork();
 403       if (Process == 0)
 404       {
 405          // Setup the FDs
 406          dup2(Pipes[0], InfoFD);
 407          SetCloseExec(STDOUT_FILENO,false);
 408          SetCloseExec(STDIN_FILENO,false);
 409          SetCloseExec(STDERR_FILENO,false);
 410
 411          string hookfd;
 412          strprintf(hookfd, "%d", InfoFD);
 413          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 414
 415          dpkgChrootDirectory();
 416          const char *Args[4];
 417          Args[0] = "/bin/sh";
 418          Args[1] = "-c";
 419          Args[2] = Opts->Value.c_str();
 420          Args[3] = 0;
 421          execv(Args[0],(char **)Args);
 422          _exit(100);
 423       }
 424       if (InfoFD == (unsigned)Pipes[0])
 425          _config->Clear("APT::Keep-Fds", Pipes[0]);
 426       close(Pipes[0]);
 427       FILE *F = fdopen(Pipes[1],"w");
 428       if (F == 0)
 429          return _error->Errno("fdopen","Faild to open new FD");
 430
 431       // Feed it the filenames.
 432       if (Version <= 1)
 433       {
 434          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 435          {
 436             // Only deal with packages to be installed from .deb
 437             if (I->Op != Item::Install)
 438                continue;
 439
 440             // No errors here..
 441             if (I->File[0] != '/')
 442                continue;
 443
 444             /* Feed the filename of each package that is pending install
 445                into the pipe. */
 446             fprintf(F,"%s\n",I->File.c_str());
 447             if (ferror(F) != 0)
 448                break;
 449          }
 450       }
 451       else
 452          SendPkgsInfo(F, Version);
 453
 454       fclose(F);
 455
 456       // Clean up the sub process
 457       if (ExecWait(Process,Opts->Value.c_str()) == false)
 458          return _error->Error("Failure running script %s",Opts->Value.c_str());
 459    }
 460
 461    return true;
 462 }
 463                                                                         /*}}}*/
 464 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 465 // ---------------------------------------------------------------------
 466 /*
 467 */
 468 void pkgDPkgPM::DoStdin(int master)
 469 {
 470    unsigned char input_buf[256] = {0,};
 471    ssize_t len = read(0, input_buf, sizeof(input_buf));
 472    if (len)
 473       FileFd::Write(master, input_buf, len);
 474    else
 475       d->stdin_is_dev_null = true;
 476 }
 477                                                                         /*}}}*/
 478 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 479 // ---------------------------------------------------------------------
 480 /*
 481  * read the terminal pty and write log
 482  */
 483 void pkgDPkgPM::DoTerminalPty(int master)
 484 {
 485    unsigned char term_buf[1024] = {0,0, };
 486
 487    ssize_t len=read(master, term_buf, sizeof(term_buf));
 488    if(len == -1 && errno == EIO)
 489    {
 490       // this happens when the child is about to exit, we
 491       // give it time to actually exit, otherwise we run
 492       // into a race so we sleep for half a second.
 493       struct timespec sleepfor = { 0, 500000000 };
 494       nanosleep(&sleepfor, NULL);
 495       return;
 496    }
 497    if(len <= 0)
 498       return;
 499    FileFd::Write(1, term_buf, len);
 500    if(d->term_out)
 501       fwrite(term_buf, len, sizeof(char), d->term_out);
 502 }
 503                                                                         /*}}}*/
 504 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 505 // ---------------------------------------------------------------------
 506 /*
 507  */
 508 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 509 {
 510    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 511    // the status we output
 512    ostringstream status;
 513
 514    if (Debug == true)
 515       std::clog << "got from dpkg '" << line << "'" << std::endl;
 516
 517
 518    /* dpkg sends strings like this:
 519       'status:   <pkg>: <pkg  qstate>'
 520       'status:   <pkg>:<arch>: <pkg  qstate>'
 521       errors look like this:
 522       '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
 523       and conffile-prompt like this
 524       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 525
 526       Newer versions of dpkg sent also:
 527       'processing: install: pkg'
 528       'processing: configure: pkg'
 529       'processing: remove: pkg'
 530       'processing: purge: pkg'
 531       'processing: disappear: pkg'
 532       'processing: trigproc: trigger'
 533
 534    */
 535    // we need to split on ": " (note the appended space) as the ':' is
 536    // part of the pkgname:arch information that dpkg sends
 537    //
 538    // A dpkg error message may contain additional ":" (like
 539    //  "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 540    // so we need to ensure to not split too much
 541    std::vector<std::string> list = StringSplit(line, ": ", 3);
 542    if(list.size() != 3)
 543    {
 544       if (Debug == true)
 545          std::clog << "ignoring line: not enough ':'" << std::endl;
 546       return;
 547    }
 548    // dpkg does not send always send "pkgname:arch" so we add it here if needed
 549    std::string pkgname = list[1];
 550    if (pkgname.find(":") == std::string::npos)
 551    {
 552       string const nativeArch = _config->Find("APT::Architecture");
 553       pkgname = pkgname + ":" + nativeArch;
 554    }
 555    const char* const pkg = pkgname.c_str();
 556    const char* action = list[2].c_str();
 557
 558    // 'processing' from dpkg looks like
 559    // 'processing: action: pkg'
 560    if(strncmp(list[0].c_str(), "processing", strlen("processing")) == 0)
 561    {
 562       char s[200];
 563       const char* const pkg_or_trigger = list[2].c_str();
 564       action =  list[1].c_str();
 565       const std::pair<const char *, const char *> * const iter =
 566         std::find_if(PackageProcessingOpsBegin,
 567                      PackageProcessingOpsEnd,
 568                      MatchProcessingOp(action));
 569       if(iter == PackageProcessingOpsEnd)
 570       {
 571          if (Debug == true)
 572             std::clog << "ignoring unknown action: " << action << std::endl;
 573          return;
 574       }
 575       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 576
 577       status << "pmstatus:" << pkg_or_trigger
 578              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 579              << ":" << s
 580              << endl;
 581       if(OutStatusFd > 0)
 582          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 583       if (Debug == true)
 584          std::clog << "send: '" << status.str() << "'" << endl;
 585
 586       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 587          handleDisappearAction(pkg_or_trigger);
 588       return;
 589    }
 590
 591    if(strncmp(action,"error",strlen("error")) == 0)
 592    {
 593       status << "pmerror:" << list[1]
 594              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 595              << ":" << list[3]
 596              << endl;
 597       if(OutStatusFd > 0)
 598          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 599       if (Debug == true)
 600          std::clog << "send: '" << status.str() << "'" << endl;
 601       pkgFailures++;
 602       WriteApportReport(list[1].c_str(), list[3].c_str());
 603       return;
 604    }
 605    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 606    {
 607       status << "pmconffile:" << list[1]
 608              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 609              << ":" << list[3]
 610              << endl;
 611       if(OutStatusFd > 0)
 612          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 613       if (Debug == true)
 614          std::clog << "send: '" << status.str() << "'" << endl;
 615       return;
 616    }
 617
 618    vector<struct DpkgState> const &states = PackageOps[pkg];
 619    const char *next_action = NULL;
 620    if(PackageOpsDone[pkg] < states.size())
 621       next_action = states[PackageOpsDone[pkg]].state;
 622    // check if the package moved to the next dpkg state
 623    if(next_action && (strcmp(action, next_action) == 0))
 624    {
 625       // only read the translation if there is actually a next
 626       // action
 627       const char *translation = _(states[PackageOpsDone[pkg]].str);
 628       char s[200];
 629       snprintf(s, sizeof(s), translation, pkg);
 630
 631       // we moved from one dpkg state to a new one, report that
 632       PackageOpsDone[pkg]++;
 633       PackagesDone++;
 634       // build the status str
 635       status << "pmstatus:" << pkg
 636              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 637              << ":" << s
 638              << endl;
 639       if(_config->FindB("DPkgPM::Progress", false) == true)
 640          SendTerminalProgress(PackagesDone/float(PackagesTotal)*100.0);
 641
 642       if(OutStatusFd > 0)
 643          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 644       if (Debug == true)
 645          std::clog << "send: '" << status.str() << "'" << endl;
 646    }
 647    if (Debug == true)
 648       std::clog << "(parsed from dpkg) pkg: " << pkg
 649                 << " action: " << action << endl;
 650 }
 651                                                                         /*}}}*/
 652 // DPkgPM::handleDisappearAction                                        /*{{{*/
 653 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 654 {
 655    // record the package name for display and stuff later
 656    disappearedPkgs.insert(pkgname);
 657
 658    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 659    if (unlikely(Pkg.end() == true))
 660       return;
 661    // the disappeared package was auto-installed - nothing to do
 662    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 663       return;
 664    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 665    if (unlikely(PkgVer.end() == true))
 666       return;
 667    /* search in the list of dependencies for (Pre)Depends,
 668       check if this dependency has a Replaces on our package
 669       and if so transfer the manual installed flag to it */
 670    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 671    {
 672       if (Dep->Type != pkgCache::Dep::Depends &&
 673           Dep->Type != pkgCache::Dep::PreDepends)
 674          continue;
 675       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 676       if (unlikely(Tar.end() == true))
 677          continue;
 678       // the package is already marked as manual
 679       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 680          continue;
 681       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 682       if (TarVer.end() == true)
 683          continue;
 684       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 685       {
 686          if (Rep->Type != pkgCache::Dep::Replaces)
 687             continue;
 688          if (Pkg != Rep.TargetPkg())
 689             continue;
 690          // okay, they are strongly connected - transfer manual-bit
 691          if (Debug == true)
 692             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 693          Cache[Tar].Flags &= ~Flag::Auto;
 694          break;
 695       }
 696    }
 697 }
 698                                                                         /*}}}*/
 699 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 700 // ---------------------------------------------------------------------
 701 /*
 702  */
 703 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 704 {
 705    char *p, *q;
 706    int len;
 707
 708    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 709    d->dpkgbuf_pos += len;
 710    if(len <= 0)
 711       return;
 712
 713    // process line by line if we have a buffer
 714    p = q = d->dpkgbuf;
 715    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 716    {
 717       *q = 0;
 718       ProcessDpkgStatusLine(OutStatusFd, p);
 719       p=q+1; // continue with next line
 720    }
 721
 722    // now move the unprocessed bits (after the final \n that is now a 0x0)
 723    // to the start and update d->dpkgbuf_pos
 724    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 725    if(p == NULL)
 726       return;
 727
 728    // we are interessted in the first char *after* 0x0
 729    p++;
 730
 731    // move the unprocessed tail to the start and update pos
 732    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 733    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 734 }
 735                                                                         /*}}}*/
 736 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 737 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 738 {
 739    size_t const length = value.length();
 740    if (length == 0)
 741       return;
 742    // poor mans rstrip(", ")
 743    if (value[length-2] == ',' && value[length-1] == ' ')
 744       value.erase(length - 2, 2);
 745    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 746 }                                                                       /*}}}*/
 747 // DPkgPM::OpenLog                                                      /*{{{*/
 748 bool pkgDPkgPM::OpenLog()
 749 {
 750    string const logdir = _config->FindDir("Dir::Log");
 751    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 752       // FIXME: use a better string after freeze
 753       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 754
 755    // get current time
 756    char timestr[200];
 757    time_t const t = time(NULL);
 758    struct tm const * const tmp = localtime(&t);
 759    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 760
 761    // open terminal log
 762    string const logfile_name = flCombine(logdir,
 763                                    _config->Find("Dir::Log::Terminal"));
 764    if (!logfile_name.empty())
 765    {
 766       d->term_out = fopen(logfile_name.c_str(),"a");
 767       if (d->term_out == NULL)
 768          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 769       setvbuf(d->term_out, NULL, _IONBF, 0);
 770       SetCloseExec(fileno(d->term_out), true);
 771       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 772       {
 773          struct passwd *pw = getpwnam("root");
 774          struct group *gr = getgrnam("adm");
 775          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 776             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 777       }
 778       if (chmod(logfile_name.c_str(), 0640) != 0)
 779          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 780       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 781    }
 782
 783    // write your history
 784    string const history_name = flCombine(logdir,
 785                                    _config->Find("Dir::Log::History"));
 786    if (!history_name.empty())
 787    {
 788       d->history_out = fopen(history_name.c_str(),"a");
 789       if (d->history_out == NULL)
 790          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 791       SetCloseExec(fileno(d->history_out), true);
 792       chmod(history_name.c_str(), 0644);
 793       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 794       string remove, purge, install, reinstall, upgrade, downgrade;
 795       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 796       {
 797          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 798          string *line = NULL;
 799          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 800          if (Cache[I].NewInstall() == true)
 801             HISTORYINFO(install, CANDIDATE_AUTO)
 802          else if (Cache[I].ReInstall() == true)
 803             HISTORYINFO(reinstall, CANDIDATE)
 804          else if (Cache[I].Upgrade() == true)
 805             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 806          else if (Cache[I].Downgrade() == true)
 807             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 808          else if (Cache[I].Delete() == true)
 809             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 810          else
 811             continue;
 812          #undef HISTORYINFO
 813          line->append(I.FullName(false)).append(" (");
 814          switch (infostring) {
 815          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 816          case CANDIDATE_AUTO:
 817             line->append(Cache[I].CandVersion);
 818             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 819                line->append(", automatic");
 820             break;
 821          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 822          case CURRENT: line->append(Cache[I].CurVersion); break;
 823          }
 824          line->append("), ");
 825       }
 826       if (_config->Exists("Commandline::AsString") == true)
 827          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 828       WriteHistoryTag("Install", install);
 829       WriteHistoryTag("Reinstall", reinstall);
 830       WriteHistoryTag("Upgrade", upgrade);
 831       WriteHistoryTag("Downgrade",downgrade);
 832       WriteHistoryTag("Remove",remove);
 833       WriteHistoryTag("Purge",purge);
 834       fflush(d->history_out);
 835    }
 836
 837    return true;
 838 }
 839                                                                         /*}}}*/
 840 // DPkg::CloseLog                                                       /*{{{*/
 841 bool pkgDPkgPM::CloseLog()
 842 {
 843    char timestr[200];
 844    time_t t = time(NULL);
 845    struct tm *tmp = localtime(&t);
 846    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 847
 848    if(d->term_out)
 849    {
 850       fprintf(d->term_out, "Log ended: ");
 851       fprintf(d->term_out, "%s", timestr);
 852       fprintf(d->term_out, "\n");
 853       fclose(d->term_out);
 854    }
 855    d->term_out = NULL;
 856
 857    if(d->history_out)
 858    {
 859       if (disappearedPkgs.empty() == false)
 860       {
 861          string disappear;
 862          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 863               d != disappearedPkgs.end(); ++d)
 864          {
 865             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 866             disappear.append(*d);
 867             if (P.end() == true)
 868                disappear.append(", ");
 869             else
 870                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 871          }
 872          WriteHistoryTag("Disappeared", disappear);
 873       }
 874       if (d->dpkg_error.empty() == false)
 875          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 876       fprintf(d->history_out, "End-Date: %s\n", timestr);
 877       fclose(d->history_out);
 878    }
 879    d->history_out = NULL;
 880
 881    return true;
 882 }
 883                                                                         /*}}}*/
 884 // DPkgPM::SendTerminalProgress                                         /*{{{*/
 885 // ---------------------------------------------------------------------
 886 /* Send progress info to the terminal
 887  */
 888 void pkgDPkgPM::SendTerminalProgress(float percentage)
 889 {
 890    int reporting_steps = _config->FindI("DpkgPM::Reporting-Steps", 1);
 891
 892    if(percentage < (d->last_reported_progress + reporting_steps))
 893       return;
 894
 895    // FIXME: use colors too
 896    std::cout << "\r\n"
 897              << "Progress: [" << std::setw(3) << int(percentage) << "%]"
 898              << "\r\n";
 899    d->last_reported_progress = percentage;
 900 }
 901                                                                         /*}}}*/
 902 /*{{{*/
 903 // This implements a racy version of pselect for those architectures
 904 // that don't have a working implementation.
 905 // FIXME: Probably can be removed on Lenny+1
 906 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 907    fd_set *exceptfds, const struct timespec *timeout,
 908    const sigset_t *sigmask)
 909 {
 910    sigset_t origmask;
 911    struct timeval tv;
 912    int retval;
 913
 914    tv.tv_sec = timeout->tv_sec;
 915    tv.tv_usec = timeout->tv_nsec/1000;
 916
 917    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 918    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 919    sigprocmask(SIG_SETMASK, &origmask, 0);
 920    return retval;
 921 }
 922 /*}}}*/
 923 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 924 // ---------------------------------------------------------------------
 925 /* This globs the operations and calls dpkg
 926  *
 927  * If it is called with "OutStatusFd" set to a valid file descriptor
 928  * apt will report the install progress over this fd. It maps the
 929  * dpkg states a package goes through to human readable (and i10n-able)
 930  * names and calculates a percentage for each step.
 931 */
 932 bool pkgDPkgPM::Go(int OutStatusFd)
 933 {
 934    pkgPackageManager::SigINTStop = false;
 935
 936    // Generate the base argument list for dpkg
 937    std::vector<const char *> Args;
 938    unsigned long StartSize = 0;
 939    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 940    {
 941       string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 942       size_t dpkgChrootLen = dpkgChrootDir.length();
 943       if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 944       {
 945          if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 946             --dpkgChrootLen;
 947          Tmp = Tmp.substr(dpkgChrootLen);
 948       }
 949    }
 950    Args.push_back(Tmp.c_str());
 951    StartSize += Tmp.length();
 952
 953    // Stick in any custom dpkg options
 954    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 955    if (Opts != 0)
 956    {
 957       Opts = Opts->Child;
 958       for (; Opts != 0; Opts = Opts->Next)
 959       {
 960          if (Opts->Value.empty() == true)
 961             continue;
 962          Args.push_back(Opts->Value.c_str());
 963          StartSize += Opts->Value.length();
 964       }
 965    }
 966
 967    size_t const BaseArgs = Args.size();
 968    // we need to detect if we can qualify packages with the architecture or not
 969    Args.push_back("--assert-multi-arch");
 970    Args.push_back(NULL);
 971
 972    pid_t dpkgAssertMultiArch = ExecFork();
 973    if (dpkgAssertMultiArch == 0)
 974    {
 975       dpkgChrootDirectory();
 976       // redirect everything to the ultimate sink as we only need the exit-status
 977       int const nullfd = open("/dev/null", O_RDONLY);
 978       dup2(nullfd, STDIN_FILENO);
 979       dup2(nullfd, STDOUT_FILENO);
 980       dup2(nullfd, STDERR_FILENO);
 981       execvp(Args[0], (char**) &Args[0]);
 982       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
 983       _exit(2);
 984    }
 985
 986    fd_set rfds;
 987    struct timespec tv;
 988    sigset_t sigmask;
 989    sigset_t original_sigmask;
 990
 991    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 992    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 993    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 994
 995    if (RunScripts("DPkg::Pre-Invoke") == false)
 996       return false;
 997
 998    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 999       return false;
1000
1001    // support subpressing of triggers processing for special
1002    // cases like d-i that runs the triggers handling manually
1003    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
1004    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
1005    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
1006       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
1007
1008    // map the dpkg states to the operations that are performed
1009    // (this is sorted in the same way as Item::Ops)
1010    static const struct DpkgState DpkgStatesOpMap[][7] = {
1011       // Install operation
1012       {
1013          {"half-installed", N_("Preparing %s")},
1014          {"unpacked", N_("Unpacking %s") },
1015          {NULL, NULL}
1016       },
1017       // Configure operation
1018       {
1019          {"unpacked",N_("Preparing to configure %s") },
1020          {"half-configured", N_("Configuring %s") },
1021          { "installed", N_("Installed %s")},
1022          {NULL, NULL}
1023       },
1024       // Remove operation
1025       {
1026          {"half-configured", N_("Preparing for removal of %s")},
1027          {"half-installed", N_("Removing %s")},
1028          {"config-files",  N_("Removed %s")},
1029          {NULL, NULL}
1030       },
1031       // Purge operation
1032       {
1033          {"config-files", N_("Preparing to completely remove %s")},
1034          {"not-installed", N_("Completely removed %s")},
1035          {NULL, NULL}
1036       },
1037    };
1038
1039    // init the PackageOps map, go over the list of packages that
1040    // that will be [installed|configured|removed|purged] and add
1041    // them to the PackageOps map (the dpkg states it goes through)
1042    // and the PackageOpsTranslations (human readable strings)
1043    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1044    {
1045       if((*I).Pkg.end() == true)
1046          continue;
1047
1048       string const name = (*I).Pkg.FullName();
1049       PackageOpsDone[name] = 0;
1050       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1051       {
1052          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1053          PackagesTotal++;
1054       }
1055    }
1056
1057    d->stdin_is_dev_null = false;
1058
1059    // create log
1060    OpenLog();
1061
1062    bool dpkgMultiArch = false;
1063    if (dpkgAssertMultiArch > 0)
1064    {
1065       int Status = 0;
1066       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1067       {
1068          if (errno == EINTR)
1069             continue;
1070          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1071          break;
1072       }
1073       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1074          dpkgMultiArch = true;
1075    }
1076
1077    // this loop is runs once per operation
1078    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
1079    {
1080       // Do all actions with the same Op in one run
1081       vector<Item>::const_iterator J = I;
1082       if (TriggersPending == true)
1083          for (; J != List.end(); ++J)
1084          {
1085             if (J->Op == I->Op)
1086                continue;
1087             if (J->Op != Item::TriggersPending)
1088                break;
1089             vector<Item>::const_iterator T = J + 1;
1090             if (T != List.end() && T->Op == I->Op)
1091                continue;
1092             break;
1093          }
1094       else
1095          for (; J != List.end() && J->Op == I->Op; ++J)
1096             /* nothing */;
1097
1098       // keep track of allocated strings for multiarch package names
1099       std::vector<char *> Packages;
1100
1101       // start with the baseset of arguments
1102       unsigned long Size = StartSize;
1103       Args.erase(Args.begin() + BaseArgs, Args.end());
1104
1105       // Now check if we are within the MaxArgs limit
1106       //
1107       // this code below is problematic, because it may happen that
1108       // the argument list is split in a way that A depends on B
1109       // and they are in the same "--configure A B" run
1110       // - with the split they may now be configured in different
1111       //   runs, using Immediate-Configure-All can help prevent this.
1112       if (J - I > (signed)MaxArgs)
1113       {
1114          J = I + MaxArgs;
1115          unsigned long const size = MaxArgs + 10;
1116          Args.reserve(size);
1117          Packages.reserve(size);
1118       }
1119       else
1120       {
1121          unsigned long const size = (J - I) + 10;
1122          Args.reserve(size);
1123          Packages.reserve(size);
1124       }
1125
1126       int fd[2];
1127       if (pipe(fd) != 0)
1128          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1129
1130 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1131 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1132
1133       ADDARGC("--status-fd");
1134       char status_fd_buf[20];
1135       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1136       ADDARG(status_fd_buf);
1137       unsigned long const Op = I->Op;
1138
1139       switch (I->Op)
1140       {
1141          case Item::Remove:
1142          ADDARGC("--force-depends");
1143          ADDARGC("--force-remove-essential");
1144          ADDARGC("--remove");
1145          break;
1146
1147          case Item::Purge:
1148          ADDARGC("--force-depends");
1149          ADDARGC("--force-remove-essential");
1150          ADDARGC("--purge");
1151          break;
1152
1153          case Item::Configure:
1154          ADDARGC("--configure");
1155          break;
1156
1157          case Item::ConfigurePending:
1158          ADDARGC("--configure");
1159          ADDARGC("--pending");
1160          break;
1161
1162          case Item::TriggersPending:
1163          ADDARGC("--triggers-only");
1164          ADDARGC("--pending");
1165          break;
1166
1167          case Item::Install:
1168          ADDARGC("--unpack");
1169          ADDARGC("--auto-deconfigure");
1170          break;
1171       }
1172
1173       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1174           I->Op != Item::ConfigurePending)
1175       {
1176          ADDARGC("--no-triggers");
1177       }
1178 #undef ADDARGC
1179
1180       // Write in the file or package names
1181       if (I->Op == Item::Install)
1182       {
1183          for (;I != J && Size < MaxArgBytes; ++I)
1184          {
1185             if (I->File[0] != '/')
1186                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1187             Args.push_back(I->File.c_str());
1188             Size += I->File.length();
1189          }
1190       }
1191       else
1192       {
1193          string const nativeArch = _config->Find("APT::Architecture");
1194          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1195          for (;I != J && Size < MaxArgBytes; ++I)
1196          {
1197             if((*I).Pkg.end() == true)
1198                continue;
1199             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1200                continue;
1201             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1202             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1203                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1204                                            strcmp(I->Pkg.Arch(), "none") == 0))
1205             {
1206                char const * const name = I->Pkg.Name();
1207                ADDARG(name);
1208             }
1209             else
1210             {
1211                pkgCache::VerIterator PkgVer;
1212                std::string name = I->Pkg.Name();
1213                if (Op == Item::Remove || Op == Item::Purge)
1214                {
1215                   PkgVer = I->Pkg.CurrentVer();
1216                   if(PkgVer.end() == true)
1217                      PkgVer = FindNowVersion(I->Pkg);
1218                }
1219                else
1220                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1221                if (strcmp(I->Pkg.Arch(), "none") == 0)
1222                   ; // never arch-qualify a package without an arch
1223                else if (PkgVer.end() == false)
1224                   name.append(":").append(PkgVer.Arch());
1225                else
1226                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1227                char * const fullname = strdup(name.c_str());
1228                Packages.push_back(fullname);
1229                ADDARG(fullname);
1230             }
1231          }
1232          // skip configure action if all sheduled packages disappeared
1233          if (oldSize == Size)
1234             continue;
1235       }
1236 #undef ADDARG
1237
1238       J = I;
1239
1240       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1241       {
1242          for (std::vector<const char *>::const_iterator a = Args.begin();
1243               a != Args.end(); ++a)
1244             clog << *a << ' ';
1245          clog << endl;
1246          continue;
1247       }
1248       Args.push_back(NULL);
1249
1250       cout << flush;
1251       clog << flush;
1252       cerr << flush;
1253
1254       /* Mask off sig int/quit. We do this because dpkg also does when
1255          it forks scripts. What happens is that when you hit ctrl-c it sends
1256          it to all processes in the group. Since dpkg ignores the signal
1257          it doesn't die but we do! So we must also ignore it */
1258       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1259       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1260
1261       // Check here for any SIGINT
1262       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1263          break;
1264
1265
1266       // ignore SIGHUP as well (debian #463030)
1267       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1268
1269       struct    termios tt;
1270       struct    winsize win;
1271       int       master = -1;
1272       int       slave = -1;
1273
1274       // if tcgetattr does not return zero there was a error
1275       // and we do not do any pty magic
1276       _error->PushToStack();
1277       if (tcgetattr(STDOUT_FILENO, &tt) == 0)
1278       {
1279          ioctl(0, TIOCGWINSZ, (char *)&win);
1280          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1281          {
1282             _error->Errno("openpty", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1283             master = slave = -1;
1284          }  else {
1285             struct termios rtt;
1286             rtt = tt;
1287             cfmakeraw(&rtt);
1288             rtt.c_lflag &= ~ECHO;
1289             rtt.c_lflag |= ISIG;
1290             // block SIGTTOU during tcsetattr to prevent a hang if
1291             // the process is a member of the background process group
1292             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1293             sigemptyset(&sigmask);
1294             sigaddset(&sigmask, SIGTTOU);
1295             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1296             tcsetattr(0, TCSAFLUSH, &rtt);
1297             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1298          }
1299       }
1300       // complain only if stdout is either a terminal (but still failed) or is an invalid
1301       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1302       else if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1303          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1304
1305       if (_error->PendingError() == true)
1306          _error->DumpErrors(std::cerr);
1307       _error->RevertToStack();
1308
1309        // Fork dpkg
1310       pid_t Child;
1311       _config->Set("APT::Keep-Fds::",fd[1]);
1312       // send status information that we are about to fork dpkg
1313       if(OutStatusFd > 0) {
1314          ostringstream status;
1315          status << "pmstatus:dpkg-exec:"
1316                 << (PackagesDone/float(PackagesTotal)*100.0)
1317                 << ":" << _("Running dpkg")
1318                 << endl;
1319          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
1320       }
1321       Child = ExecFork();
1322
1323       // This is the child
1324       if (Child == 0)
1325       {
1326          if(slave >= 0 && master >= 0)
1327          {
1328             setsid();
1329             ioctl(slave, TIOCSCTTY, 0);
1330             close(master);
1331             dup2(slave, 0);
1332             dup2(slave, 1);
1333             dup2(slave, 2);
1334             close(slave);
1335          }
1336          close(fd[0]); // close the read end of the pipe
1337
1338          dpkgChrootDirectory();
1339
1340          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1341             _exit(100);
1342
1343          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1344          {
1345             int Flags,dummy;
1346             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1347                _exit(100);
1348
1349             // Discard everything in stdin before forking dpkg
1350             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1351                _exit(100);
1352
1353             while (read(STDIN_FILENO,&dummy,1) == 1);
1354
1355             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1356                _exit(100);
1357          }
1358
1359          /* No Job Control Stop Env is a magic dpkg var that prevents it
1360             from using sigstop */
1361          putenv((char *)"DPKG_NO_TSTP=yes");
1362          execvp(Args[0], (char**) &Args[0]);
1363          cerr << "Could not exec dpkg!" << endl;
1364          _exit(100);
1365       }
1366
1367       // apply ionice
1368       if (_config->FindB("DPkg::UseIoNice", false) == true)
1369          ionice(Child);
1370
1371       // clear the Keep-Fd again
1372       _config->Clear("APT::Keep-Fds",fd[1]);
1373
1374       // Wait for dpkg
1375       int Status = 0;
1376
1377       // we read from dpkg here
1378       int const _dpkgin = fd[0];
1379       close(fd[1]);                        // close the write end of the pipe
1380
1381       if(slave > 0)
1382          close(slave);
1383
1384       // setups fds
1385       sigemptyset(&sigmask);
1386       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1387
1388       /* free vectors (and therefore memory) as we don't need the included data anymore */
1389       for (std::vector<char *>::const_iterator p = Packages.begin();
1390            p != Packages.end(); ++p)
1391          free(*p);
1392       Packages.clear();
1393
1394       // the result of the waitpid call
1395       int res;
1396       int select_ret;
1397       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1398          if(res < 0) {
1399             // FIXME: move this to a function or something, looks ugly here
1400             // error handling, waitpid returned -1
1401             if (errno == EINTR)
1402                continue;
1403             RunScripts("DPkg::Post-Invoke");
1404
1405             // Restore sig int/quit
1406             signal(SIGQUIT,old_SIGQUIT);
1407             signal(SIGINT,old_SIGINT);
1408
1409             signal(SIGHUP,old_SIGHUP);
1410             return _error->Errno("waitpid","Couldn't wait for subprocess");
1411          }
1412
1413          // wait for input or output here
1414          FD_ZERO(&rfds);
1415          if (master >= 0 && !d->stdin_is_dev_null)
1416             FD_SET(0, &rfds);
1417          FD_SET(_dpkgin, &rfds);
1418          if(master >= 0)
1419             FD_SET(master, &rfds);
1420          tv.tv_sec = 1;
1421          tv.tv_nsec = 0;
1422          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1423                               &tv, &original_sigmask);
1424          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1425             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1426                                       NULL, &tv, &original_sigmask);
1427          if (select_ret == 0)
1428             continue;
1429          else if (select_ret < 0 && errno == EINTR)
1430             continue;
1431          else if (select_ret < 0)
1432          {
1433             perror("select() returned error");
1434             continue;
1435          }
1436
1437          if(master >= 0 && FD_ISSET(master, &rfds))
1438             DoTerminalPty(master);
1439          if(master >= 0 && FD_ISSET(0, &rfds))
1440             DoStdin(master);
1441          if(FD_ISSET(_dpkgin, &rfds))
1442             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1443       }
1444       close(_dpkgin);
1445
1446       // Restore sig int/quit
1447       signal(SIGQUIT,old_SIGQUIT);
1448       signal(SIGINT,old_SIGINT);
1449
1450       signal(SIGHUP,old_SIGHUP);
1451
1452       if(master >= 0)
1453       {
1454          tcsetattr(0, TCSAFLUSH, &tt);
1455          close(master);
1456       }
1457
1458       // Check for an error code.
1459       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1460       {
1461          // if it was set to "keep-dpkg-runing" then we won't return
1462          // here but keep the loop going and just report it as a error
1463          // for later
1464          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1465
1466          if(stopOnError)
1467             RunScripts("DPkg::Post-Invoke");
1468
1469          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1470             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1471          else if (WIFEXITED(Status) != 0)
1472             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1473          else
1474             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1475
1476          if(d->dpkg_error.size() > 0)
1477             _error->Error("%s", d->dpkg_error.c_str());
1478
1479          if(stopOnError)
1480          {
1481             CloseLog();
1482             return false;
1483          }
1484       }
1485    }
1486    CloseLog();
1487
1488    // dpkg is done at this point
1489    if(_config->FindB("DPkgPM::Progress", false) == true)
1490       SendTerminalProgress(100);
1491
1492    if (pkgPackageManager::SigINTStop)
1493        _error->Warning(_("Operation was interrupted before it could finish"));
1494
1495    if (RunScripts("DPkg::Post-Invoke") == false)
1496       return false;
1497
1498    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1499    {
1500       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1501       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1502           unlink(oldpkgcache.c_str()) == 0)
1503       {
1504          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1505          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1506          {
1507             _error->PushToStack();
1508             pkgCacheFile CacheFile;
1509             CacheFile.BuildCaches(NULL, true);
1510             _error->RevertToStack();
1511          }
1512       }
1513    }
1514
1515    Cache.writeStateFile(NULL);
1516    return true;
1517 }
1518
1519 void SigINT(int sig) {
1520    pkgPackageManager::SigINTStop = true;
1521 }
1522                                                                         /*}}}*/
1523 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1524 // ---------------------------------------------------------------------
1525 /* */
1526 void pkgDPkgPM::Reset()
1527 {
1528    List.erase(List.begin(),List.end());
1529 }
1530                                                                         /*}}}*/
1531 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1532 // ---------------------------------------------------------------------
1533 /* */
1534 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1535 {
1536    // If apport doesn't exist or isn't installed do nothing
1537    // This e.g. prevents messages in 'universes' without apport
1538    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1539    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1540       return;
1541
1542    string pkgname, reportfile, srcpkgname, pkgver, arch;
1543    string::size_type pos;
1544    FILE *report;
1545
1546    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1547    {
1548       std::clog << "configured to not write apport reports" << std::endl;
1549       return;
1550    }
1551
1552    // only report the first errors
1553    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1554    {
1555       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1556       return;
1557    }
1558
1559    // check if its not a follow up error
1560    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1561    if(strstr(errormsg, needle) != NULL) {
1562       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1563       return;
1564    }
1565
1566    // do not report disk-full failures
1567    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1568       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1569       return;
1570    }
1571
1572    // do not report out-of-memory failures
1573    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1574       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1575       return;
1576    }
1577
1578    // do not report dpkg I/O errors
1579    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1580    if(strstr(errormsg, "short read in buffer_copy (")) {
1581       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1582       return;
1583    }
1584
1585    // get the pkgname and reportfile
1586    pkgname = flNotDir(pkgpath);
1587    pos = pkgname.find('_');
1588    if(pos != string::npos)
1589       pkgname = pkgname.substr(0, pos);
1590
1591    // find the package versin and source package name
1592    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1593    if (Pkg.end() == true)
1594       return;
1595    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1596    if (Ver.end() == true)
1597       return;
1598    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1599    pkgRecords Recs(Cache);
1600    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1601    srcpkgname = Parse.SourcePkg();
1602    if(srcpkgname.empty())
1603       srcpkgname = pkgname;
1604
1605    // if the file exists already, we check:
1606    // - if it was reported already (touched by apport).
1607    //   If not, we do nothing, otherwise
1608    //    we overwrite it. This is the same behaviour as apport
1609    // - if we have a report with the same pkgversion already
1610    //   then we skip it
1611    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1612    if(FileExists(reportfile))
1613    {
1614       struct stat buf;
1615       char strbuf[255];
1616
1617       // check atime/mtime
1618       stat(reportfile.c_str(), &buf);
1619       if(buf.st_mtime > buf.st_atime)
1620          return;
1621
1622       // check if the existing report is the same version
1623       report = fopen(reportfile.c_str(),"r");
1624       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1625       {
1626          if(strstr(strbuf,"Package:") == strbuf)
1627          {
1628             char pkgname[255], version[255];
1629             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1630                if(strcmp(pkgver.c_str(), version) == 0)
1631                {
1632                   fclose(report);
1633                   return;
1634                }
1635          }
1636       }
1637       fclose(report);
1638    }
1639
1640    // now write the report
1641    arch = _config->Find("APT::Architecture");
1642    report = fopen(reportfile.c_str(),"w");
1643    if(report == NULL)
1644       return;
1645    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1646       chmod(reportfile.c_str(), 0);
1647    else
1648       chmod(reportfile.c_str(), 0600);
1649    fprintf(report, "ProblemType: Package\n");
1650    fprintf(report, "Architecture: %s\n", arch.c_str());
1651    time_t now = time(NULL);
1652    fprintf(report, "Date: %s" , ctime(&now));
1653    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1654    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1655    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1656
1657    // ensure that the log is flushed
1658    if(d->term_out)
1659       fflush(d->term_out);
1660
1661    // attach terminal log it if we have it
1662    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1663    if (!logfile_name.empty())
1664    {
1665       FILE *log = NULL;
1666
1667       fprintf(report, "DpkgTerminalLog:\n");
1668       log = fopen(logfile_name.c_str(),"r");
1669       if(log != NULL)
1670       {
1671          char buf[1024];
1672          while( fgets(buf, sizeof(buf), log) != NULL)
1673             fprintf(report, " %s", buf);
1674          fclose(log);
1675       }
1676    }
1677
1678    // log the ordering
1679    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1680    fprintf(report, "AptOrdering:\n");
1681    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1682       if ((*I).Pkg != NULL)
1683          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1684       else
1685          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1686
1687    // attach dmesg log (to learn about segfaults)
1688    if (FileExists("/bin/dmesg"))
1689    {
1690       fprintf(report, "Dmesg:\n");
1691       FILE *log = popen("/bin/dmesg","r");
1692       if(log != NULL)
1693       {
1694          char buf[1024];
1695          while( fgets(buf, sizeof(buf), log) != NULL)
1696             fprintf(report, " %s", buf);
1697          pclose(log);
1698       }
1699    }
1700
1701    // attach df -l log (to learn about filesystem status)
1702    if (FileExists("/bin/df"))
1703    {
1704
1705       fprintf(report, "Df:\n");
1706       FILE *log = popen("/bin/df -l","r");
1707       if(log != NULL)
1708       {
1709          char buf[1024];
1710          while( fgets(buf, sizeof(buf), log) != NULL)
1711             fprintf(report, " %s", buf);
1712          pclose(log);
1713       }
1714    }
1715
1716    fclose(report);
1717
1718 }
1719                                                                         /*}}}*/