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
  41 #include <termios.h>
  42 #include <unistd.h>
  43 #include <sys/ioctl.h>
  44 #include <pty.h>
  45
  46 #include <apti18n.h>
  47                                                                         /*}}}*/
  48
  49 using namespace std;
  50
  51 class pkgDPkgPMPrivate
  52 {
  53 public:
  54    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
  55                         term_out(NULL), history_out(NULL)
  56    {
  57       dpkgbuf[0] = '\0';
  58    }
  59    bool stdin_is_dev_null;
  60    // the buffer we use for the dpkg status-fd reading
  61    char dpkgbuf[1024];
  62    int dpkgbuf_pos;
  63    FILE *term_out;
  64    FILE *history_out;
  65    string dpkg_error;
  66 };
  67
  68 namespace
  69 {
  70   // Maps the dpkg "processing" info to human readable names.  Entry 0
  71   // of each array is the key, entry 1 is the value.
  72   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  73     std::make_pair("install",   N_("Installing %s")),
  74     std::make_pair("configure", N_("Configuring %s")),
  75     std::make_pair("remove",    N_("Removing %s")),
  76     std::make_pair("purge",    N_("Completely removing %s")),
  77     std::make_pair("disappear", N_("Noting disappearance of %s")),
  78     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  79   };
  80
  81   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  82   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  83
  84   // Predicate to test whether an entry in the PackageProcessingOps
  85   // array matches a string.
  86   class MatchProcessingOp
  87   {
  88     const char *target;
  89
  90   public:
  91     MatchProcessingOp(const char *the_target)
  92       : target(the_target)
  93     {
  94     }
  95
  96     bool operator()(const std::pair<const char *, const char *> &pair) const
  97     {
  98       return strcmp(pair.first, target) == 0;
  99     }
 100   };
 101 }
 102
 103 /* helper function to ionice the given PID
 104
 105  there is no C header for ionice yet - just the syscall interface
 106  so we use the binary from util-linux
 107 */
 108 static bool
 109 ionice(int PID)
 110 {
 111    if (!FileExists("/usr/bin/ionice"))
 112       return false;
 113    pid_t Process = ExecFork();
 114    if (Process == 0)
 115    {
 116       char buf[32];
 117       snprintf(buf, sizeof(buf), "-p%d", PID);
 118       const char *Args[4];
 119       Args[0] = "/usr/bin/ionice";
 120       Args[1] = "-c3";
 121       Args[2] = buf;
 122       Args[3] = 0;
 123       execv(Args[0], (char **)Args);
 124    }
 125    return ExecWait(Process, "ionice");
 126 }
 127
 128 // dpkgChrootDirectory - chrooting for dpkg if needed                   /*{{{*/
 129 static void dpkgChrootDirectory()
 130 {
 131    std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
 132    if (chrootDir == "/")
 133       return;
 134    std::cerr << "Chrooting into " << chrootDir << std::endl;
 135    if (chroot(chrootDir.c_str()) != 0)
 136       _exit(100);
 137    chdir("/");
 138 }
 139                                                                         /*}}}*/
 140
 141
 142 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 143 // ---------------------------------------------------------------------
 144 /* This is helpful when a package is no longer installed but has residual
 145  * config files
 146  */
 147 static
 148 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 149 {
 150    pkgCache::VerIterator Ver;
 151    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 152    {
 153       pkgCache::VerFileIterator Vf = Ver.FileList();
 154       pkgCache::PkgFileIterator F = Vf.File();
 155       for (F = Vf.File(); F.end() == false; ++F)
 156       {
 157          if (F && F.Archive())
 158          {
 159             if (strcmp(F.Archive(), "now"))
 160                return Ver;
 161          }
 162       }
 163    }
 164    return Ver;
 165 }
 166                                                                         /*}}}*/
 167
 168 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 169 // ---------------------------------------------------------------------
 170 /* */
 171 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 172    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 173 {
 174    d = new pkgDPkgPMPrivate();
 175 }
 176                                                                         /*}}}*/
 177 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 178 // ---------------------------------------------------------------------
 179 /* */
 180 pkgDPkgPM::~pkgDPkgPM()
 181 {
 182    delete d;
 183 }
 184                                                                         /*}}}*/
 185 // DPkgPM::Install - Install a package                                  /*{{{*/
 186 // ---------------------------------------------------------------------
 187 /* Add an install operation to the sequence list */
 188 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 189 {
 190    if (File.empty() == true || Pkg.end() == true)
 191       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 192
 193    // If the filename string begins with DPkg::Chroot-Directory, return the
 194    // substr that is within the chroot so dpkg can access it.
 195    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 196    if (chrootdir != "/" && File.find(chrootdir) == 0)
 197    {
 198       size_t len = chrootdir.length();
 199       if (chrootdir.at(len - 1) == '/')
 200         len--;
 201       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 202    }
 203    else
 204       List.push_back(Item(Item::Install,Pkg,File));
 205
 206    return true;
 207 }
 208                                                                         /*}}}*/
 209 // DPkgPM::Configure - Configure a package                              /*{{{*/
 210 // ---------------------------------------------------------------------
 211 /* Add a configure operation to the sequence list */
 212 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 213 {
 214    if (Pkg.end() == true)
 215       return false;
 216
 217    List.push_back(Item(Item::Configure, Pkg));
 218
 219    // Use triggers for config calls if we configure "smart"
 220    // as otherwise Pre-Depends will not be satisfied, see #526774
 221    if (_config->FindB("DPkg::TriggersPending", false) == true)
 222       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 223
 224    return true;
 225 }
 226                                                                         /*}}}*/
 227 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 228 // ---------------------------------------------------------------------
 229 /* Add a remove operation to the sequence list */
 230 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 231 {
 232    if (Pkg.end() == true)
 233       return false;
 234
 235    if (Purge == true)
 236       List.push_back(Item(Item::Purge,Pkg));
 237    else
 238       List.push_back(Item(Item::Remove,Pkg));
 239    return true;
 240 }
 241                                                                         /*}}}*/
 242 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 243 // ---------------------------------------------------------------------
 244 /* This is part of the helper script communication interface, it sends
 245    very complete information down to the other end of the pipe.*/
 246 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 247 {
 248    return SendPkgsInfo(F, 2);
 249 }
 250 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 251 {
 252    // This version of APT supports only v3, so don't sent higher versions
 253    if (Version <= 3)
 254       fprintf(F,"VERSION %u\n", Version);
 255    else
 256       fprintf(F,"VERSION 3\n");
 257
 258    /* Write out all of the configuration directives by walking the
 259       configuration tree */
 260    const Configuration::Item *Top = _config->Tree(0);
 261    for (; Top != 0;)
 262    {
 263       if (Top->Value.empty() == false)
 264       {
 265          fprintf(F,"%s=%s\n",
 266                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 267                  QuoteString(Top->Value,"\n").c_str());
 268       }
 269
 270       if (Top->Child != 0)
 271       {
 272          Top = Top->Child;
 273          continue;
 274       }
 275
 276       while (Top != 0 && Top->Next == 0)
 277          Top = Top->Parent;
 278       if (Top != 0)
 279          Top = Top->Next;
 280    }
 281    fprintf(F,"\n");
 282
 283    // Write out the package actions in order.
 284    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 285    {
 286       if(I->Pkg.end() == true)
 287          continue;
 288
 289       pkgDepCache::StateCache &S = Cache[I->Pkg];
 290
 291       fprintf(F,"%s ",I->Pkg.Name());
 292
 293       // Current version which we are going to replace
 294       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 295       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 296          CurVer = FindNowVersion(I->Pkg);
 297
 298       if (CurVer.end() == true)
 299       {
 300          if (Version <= 2)
 301             fprintf(F, "- ");
 302          else
 303             fprintf(F, "- - none ");
 304       }
 305       else
 306       {
 307          fprintf(F, "%s ", CurVer.VerStr());
 308          if (Version >= 3)
 309             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 310       }
 311
 312       // Show the compare operator between current and install version
 313       if (S.InstallVer != 0)
 314       {
 315          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 316          int Comp = 2;
 317          if (CurVer.end() == false)
 318             Comp = InstVer.CompareVer(CurVer);
 319          if (Comp < 0)
 320             fprintf(F,"> ");
 321          else if (Comp == 0)
 322             fprintf(F,"= ");
 323          else if (Comp > 0)
 324             fprintf(F,"< ");
 325          fprintf(F, "%s ", InstVer.VerStr());
 326          if (Version >= 3)
 327             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 328       }
 329       else
 330       {
 331          if (Version <= 2)
 332             fprintf(F, "> - ");
 333          else
 334             fprintf(F, "> - - none ");
 335       }
 336
 337       // Show the filename/operation
 338       if (I->Op == Item::Install)
 339       {
 340          // No errors here..
 341          if (I->File[0] != '/')
 342             fprintf(F,"**ERROR**\n");
 343          else
 344             fprintf(F,"%s\n",I->File.c_str());
 345       }
 346       else if (I->Op == Item::Configure)
 347          fprintf(F,"**CONFIGURE**\n");
 348       else if (I->Op == Item::Remove ||
 349           I->Op == Item::Purge)
 350          fprintf(F,"**REMOVE**\n");
 351
 352       if (ferror(F) != 0)
 353          return false;
 354    }
 355    return true;
 356 }
 357                                                                         /*}}}*/
 358 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 359 // ---------------------------------------------------------------------
 360 /* This looks for a list of scripts to run from the configuration file
 361    each one is run and is fed on standard input a list of all .deb files
 362    that are due to be installed. */
 363 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 364 {
 365    Configuration::Item const *Opts = _config->Tree(Cnf);
 366    if (Opts == 0 || Opts->Child == 0)
 367       return true;
 368    Opts = Opts->Child;
 369
 370    unsigned int Count = 1;
 371    for (; Opts != 0; Opts = Opts->Next, Count++)
 372    {
 373       if (Opts->Value.empty() == true)
 374          continue;
 375
 376       // Determine the protocol version
 377       string OptSec = Opts->Value;
 378       string::size_type Pos;
 379       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 380          Pos = OptSec.length();
 381       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 382
 383       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 384
 385       // Create the pipes
 386       int Pipes[2];
 387       if (pipe(Pipes) != 0)
 388          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 389       SetCloseExec(Pipes[0],true);
 390       SetCloseExec(Pipes[1],true);
 391
 392       // Purified Fork for running the script
 393       pid_t Process = ExecFork();
 394       if (Process == 0)
 395       {
 396          // Setup the FDs
 397          dup2(Pipes[0],STDIN_FILENO);
 398          SetCloseExec(STDOUT_FILENO,false);
 399          SetCloseExec(STDIN_FILENO,false);
 400          SetCloseExec(STDERR_FILENO,false);
 401
 402          dpkgChrootDirectory();
 403          const char *Args[4];
 404          Args[0] = "/bin/sh";
 405          Args[1] = "-c";
 406          Args[2] = Opts->Value.c_str();
 407          Args[3] = 0;
 408          execv(Args[0],(char **)Args);
 409          _exit(100);
 410       }
 411       close(Pipes[0]);
 412       FILE *F = fdopen(Pipes[1],"w");
 413       if (F == 0)
 414          return _error->Errno("fdopen","Faild to open new FD");
 415
 416       // Feed it the filenames.
 417       if (Version <= 1)
 418       {
 419          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 420          {
 421             // Only deal with packages to be installed from .deb
 422             if (I->Op != Item::Install)
 423                continue;
 424
 425             // No errors here..
 426             if (I->File[0] != '/')
 427                continue;
 428
 429             /* Feed the filename of each package that is pending install
 430                into the pipe. */
 431             fprintf(F,"%s\n",I->File.c_str());
 432             if (ferror(F) != 0)
 433                break;
 434          }
 435       }
 436       else
 437          SendPkgsInfo(F, Version);
 438
 439       fclose(F);
 440
 441       // Clean up the sub process
 442       if (ExecWait(Process,Opts->Value.c_str()) == false)
 443          return _error->Error("Failure running script %s",Opts->Value.c_str());
 444    }
 445
 446    return true;
 447 }
 448                                                                         /*}}}*/
 449 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 450 // ---------------------------------------------------------------------
 451 /*
 452 */
 453 void pkgDPkgPM::DoStdin(int master)
 454 {
 455    unsigned char input_buf[256] = {0,};
 456    ssize_t len = read(0, input_buf, sizeof(input_buf));
 457    if (len)
 458       FileFd::Write(master, input_buf, len);
 459    else
 460       d->stdin_is_dev_null = true;
 461 }
 462                                                                         /*}}}*/
 463 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 464 // ---------------------------------------------------------------------
 465 /*
 466  * read the terminal pty and write log
 467  */
 468 void pkgDPkgPM::DoTerminalPty(int master)
 469 {
 470    unsigned char term_buf[1024] = {0,0, };
 471
 472    ssize_t len=read(master, term_buf, sizeof(term_buf));
 473    if(len == -1 && errno == EIO)
 474    {
 475       // this happens when the child is about to exit, we
 476       // give it time to actually exit, otherwise we run
 477       // into a race so we sleep for half a second.
 478       struct timespec sleepfor = { 0, 500000000 };
 479       nanosleep(&sleepfor, NULL);
 480       return;
 481    }
 482    if(len <= 0)
 483       return;
 484    FileFd::Write(1, term_buf, len);
 485    if(d->term_out)
 486       fwrite(term_buf, len, sizeof(char), d->term_out);
 487 }
 488                                                                         /*}}}*/
 489 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 490 // ---------------------------------------------------------------------
 491 /*
 492  */
 493 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 494 {
 495    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 496    // the status we output
 497    ostringstream status;
 498
 499    if (Debug == true)
 500       std::clog << "got from dpkg '" << line << "'" << std::endl;
 501
 502
 503    /* dpkg sends strings like this:
 504       'status:   <pkg>:  <pkg  qstate>'
 505       errors look like this:
 506       '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
 507       and conffile-prompt like this
 508       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 509
 510       Newer versions of dpkg sent also:
 511       'processing: install: pkg'
 512       'processing: configure: pkg'
 513       'processing: remove: pkg'
 514       'processing: purge: pkg'
 515       'processing: disappear: pkg'
 516       'processing: trigproc: trigger'
 517
 518    */
 519    char* list[6];
 520    //        dpkg sends multiline error messages sometimes (see
 521    //        #374195 for a example. we should support this by
 522    //        either patching dpkg to not send multiline over the
 523    //        statusfd or by rewriting the code here to deal with
 524    //        it. for now we just ignore it and not crash
 525    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 526    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 527    {
 528       if (Debug == true)
 529          std::clog << "ignoring line: not enough ':'" << std::endl;
 530       return;
 531    }
 532    const char* const pkg = list[1];
 533    const char* action = _strstrip(list[2]);
 534
 535    // 'processing' from dpkg looks like
 536    // 'processing: action: pkg'
 537    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 538    {
 539       char s[200];
 540       const char* const pkg_or_trigger = _strstrip(list[2]);
 541       action = _strstrip( list[1]);
 542       const std::pair<const char *, const char *> * const iter =
 543         std::find_if(PackageProcessingOpsBegin,
 544                      PackageProcessingOpsEnd,
 545                      MatchProcessingOp(action));
 546       if(iter == PackageProcessingOpsEnd)
 547       {
 548          if (Debug == true)
 549             std::clog << "ignoring unknown action: " << action << std::endl;
 550          return;
 551       }
 552       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 553
 554       status << "pmstatus:" << pkg_or_trigger
 555              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 556              << ":" << s
 557              << endl;
 558       if(OutStatusFd > 0)
 559          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 560       if (Debug == true)
 561          std::clog << "send: '" << status.str() << "'" << endl;
 562
 563       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 564          handleDisappearAction(pkg_or_trigger);
 565       return;
 566    }
 567
 568    if(strncmp(action,"error",strlen("error")) == 0)
 569    {
 570       // urgs, sometime has ":" in its error string so that we
 571       // end up with the error message split between list[3]
 572       // and list[4], e.g. the message:
 573       // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 574       // concat them again
 575       if( list[4] != NULL )
 576          list[3][strlen(list[3])] = ':';
 577
 578       status << "pmerror:" << list[1]
 579              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 580              << ":" << list[3]
 581              << endl;
 582       if(OutStatusFd > 0)
 583          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 584       if (Debug == true)
 585          std::clog << "send: '" << status.str() << "'" << endl;
 586       pkgFailures++;
 587       WriteApportReport(list[1], list[3]);
 588       return;
 589    }
 590    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 591    {
 592       status << "pmconffile:" << list[1]
 593              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 594              << ":" << list[3]
 595              << endl;
 596       if(OutStatusFd > 0)
 597          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 598       if (Debug == true)
 599          std::clog << "send: '" << status.str() << "'" << endl;
 600       return;
 601    }
 602
 603    vector<struct DpkgState> const &states = PackageOps[pkg];
 604    const char *next_action = NULL;
 605    if(PackageOpsDone[pkg] < states.size())
 606       next_action = states[PackageOpsDone[pkg]].state;
 607    // check if the package moved to the next dpkg state
 608    if(next_action && (strcmp(action, next_action) == 0))
 609    {
 610       // only read the translation if there is actually a next
 611       // action
 612       const char *translation = _(states[PackageOpsDone[pkg]].str);
 613       char s[200];
 614       snprintf(s, sizeof(s), translation, pkg);
 615
 616       // we moved from one dpkg state to a new one, report that
 617       PackageOpsDone[pkg]++;
 618       PackagesDone++;
 619       // build the status str
 620       status << "pmstatus:" << pkg
 621              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 622              << ":" << s
 623              << endl;
 624       if(OutStatusFd > 0)
 625          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 626       if (Debug == true)
 627          std::clog << "send: '" << status.str() << "'" << endl;
 628    }
 629    if (Debug == true)
 630       std::clog << "(parsed from dpkg) pkg: " << pkg
 631                 << " action: " << action << endl;
 632 }
 633                                                                         /*}}}*/
 634 // DPkgPM::handleDisappearAction                                        /*{{{*/
 635 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 636 {
 637    // record the package name for display and stuff later
 638    disappearedPkgs.insert(pkgname);
 639
 640    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 641    if (unlikely(Pkg.end() == true))
 642       return;
 643    // the disappeared package was auto-installed - nothing to do
 644    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 645       return;
 646    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 647    if (unlikely(PkgVer.end() == true))
 648       return;
 649    /* search in the list of dependencies for (Pre)Depends,
 650       check if this dependency has a Replaces on our package
 651       and if so transfer the manual installed flag to it */
 652    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 653    {
 654       if (Dep->Type != pkgCache::Dep::Depends &&
 655           Dep->Type != pkgCache::Dep::PreDepends)
 656          continue;
 657       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 658       if (unlikely(Tar.end() == true))
 659          continue;
 660       // the package is already marked as manual
 661       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 662          continue;
 663       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 664       if (TarVer.end() == true)
 665          continue;
 666       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 667       {
 668          if (Rep->Type != pkgCache::Dep::Replaces)
 669             continue;
 670          if (Pkg != Rep.TargetPkg())
 671             continue;
 672          // okay, they are strongly connected - transfer manual-bit
 673          if (Debug == true)
 674             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 675          Cache[Tar].Flags &= ~Flag::Auto;
 676          break;
 677       }
 678    }
 679 }
 680                                                                         /*}}}*/
 681 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 682 // ---------------------------------------------------------------------
 683 /*
 684  */
 685 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 686 {
 687    char *p, *q;
 688    int len;
 689
 690    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 691    d->dpkgbuf_pos += len;
 692    if(len <= 0)
 693       return;
 694
 695    // process line by line if we have a buffer
 696    p = q = d->dpkgbuf;
 697    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 698    {
 699       *q = 0;
 700       ProcessDpkgStatusLine(OutStatusFd, p);
 701       p=q+1; // continue with next line
 702    }
 703
 704    // now move the unprocessed bits (after the final \n that is now a 0x0)
 705    // to the start and update d->dpkgbuf_pos
 706    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 707    if(p == NULL)
 708       return;
 709
 710    // we are interessted in the first char *after* 0x0
 711    p++;
 712
 713    // move the unprocessed tail to the start and update pos
 714    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 715    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 716 }
 717                                                                         /*}}}*/
 718 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 719 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 720 {
 721    size_t const length = value.length();
 722    if (length == 0)
 723       return;
 724    // poor mans rstrip(", ")
 725    if (value[length-2] == ',' && value[length-1] == ' ')
 726       value.erase(length - 2, 2);
 727    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 728 }                                                                       /*}}}*/
 729 // DPkgPM::OpenLog                                                      /*{{{*/
 730 bool pkgDPkgPM::OpenLog()
 731 {
 732    string const logdir = _config->FindDir("Dir::Log");
 733    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 734       // FIXME: use a better string after freeze
 735       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 736
 737    // get current time
 738    char timestr[200];
 739    time_t const t = time(NULL);
 740    struct tm const * const tmp = localtime(&t);
 741    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 742
 743    // open terminal log
 744    string const logfile_name = flCombine(logdir,
 745                                    _config->Find("Dir::Log::Terminal"));
 746    if (!logfile_name.empty())
 747    {
 748       d->term_out = fopen(logfile_name.c_str(),"a");
 749       if (d->term_out == NULL)
 750          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 751       setvbuf(d->term_out, NULL, _IONBF, 0);
 752       SetCloseExec(fileno(d->term_out), true);
 753       struct passwd *pw;
 754       struct group *gr;
 755       pw = getpwnam("root");
 756       gr = getgrnam("adm");
 757       if (pw != NULL && gr != NULL)
 758           chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid);
 759       chmod(logfile_name.c_str(), 0640);
 760       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 761    }
 762
 763    // write your history
 764    string const history_name = flCombine(logdir,
 765                                    _config->Find("Dir::Log::History"));
 766    if (!history_name.empty())
 767    {
 768       d->history_out = fopen(history_name.c_str(),"a");
 769       if (d->history_out == NULL)
 770          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 771       SetCloseExec(fileno(d->history_out), true);
 772       chmod(history_name.c_str(), 0644);
 773       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 774       string remove, purge, install, reinstall, upgrade, downgrade;
 775       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 776       {
 777          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 778          string *line = NULL;
 779          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 780          if (Cache[I].NewInstall() == true)
 781             HISTORYINFO(install, CANDIDATE_AUTO)
 782          else if (Cache[I].ReInstall() == true)
 783             HISTORYINFO(reinstall, CANDIDATE)
 784          else if (Cache[I].Upgrade() == true)
 785             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 786          else if (Cache[I].Downgrade() == true)
 787             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 788          else if (Cache[I].Delete() == true)
 789             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 790          else
 791             continue;
 792          #undef HISTORYINFO
 793          line->append(I.FullName(false)).append(" (");
 794          switch (infostring) {
 795          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 796          case CANDIDATE_AUTO:
 797             line->append(Cache[I].CandVersion);
 798             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 799                line->append(", automatic");
 800             break;
 801          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 802          case CURRENT: line->append(Cache[I].CurVersion); break;
 803          }
 804          line->append("), ");
 805       }
 806       if (_config->Exists("Commandline::AsString") == true)
 807          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 808       WriteHistoryTag("Install", install);
 809       WriteHistoryTag("Reinstall", reinstall);
 810       WriteHistoryTag("Upgrade", upgrade);
 811       WriteHistoryTag("Downgrade",downgrade);
 812       WriteHistoryTag("Remove",remove);
 813       WriteHistoryTag("Purge",purge);
 814       fflush(d->history_out);
 815    }
 816
 817    return true;
 818 }
 819                                                                         /*}}}*/
 820 // DPkg::CloseLog                                                       /*{{{*/
 821 bool pkgDPkgPM::CloseLog()
 822 {
 823    char timestr[200];
 824    time_t t = time(NULL);
 825    struct tm *tmp = localtime(&t);
 826    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 827
 828    if(d->term_out)
 829    {
 830       fprintf(d->term_out, "Log ended: ");
 831       fprintf(d->term_out, "%s", timestr);
 832       fprintf(d->term_out, "\n");
 833       fclose(d->term_out);
 834    }
 835    d->term_out = NULL;
 836
 837    if(d->history_out)
 838    {
 839       if (disappearedPkgs.empty() == false)
 840       {
 841          string disappear;
 842          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 843               d != disappearedPkgs.end(); ++d)
 844          {
 845             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 846             disappear.append(*d);
 847             if (P.end() == true)
 848                disappear.append(", ");
 849             else
 850                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 851          }
 852          WriteHistoryTag("Disappeared", disappear);
 853       }
 854       if (d->dpkg_error.empty() == false)
 855          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 856       fprintf(d->history_out, "End-Date: %s\n", timestr);
 857       fclose(d->history_out);
 858    }
 859    d->history_out = NULL;
 860
 861    return true;
 862 }
 863                                                                         /*}}}*/
 864 /*{{{*/
 865 // This implements a racy version of pselect for those architectures
 866 // that don't have a working implementation.
 867 // FIXME: Probably can be removed on Lenny+1
 868 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 869    fd_set *exceptfds, const struct timespec *timeout,
 870    const sigset_t *sigmask)
 871 {
 872    sigset_t origmask;
 873    struct timeval tv;
 874    int retval;
 875
 876    tv.tv_sec = timeout->tv_sec;
 877    tv.tv_usec = timeout->tv_nsec/1000;
 878
 879    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 880    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 881    sigprocmask(SIG_SETMASK, &origmask, 0);
 882    return retval;
 883 }
 884 /*}}}*/
 885 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 886 // ---------------------------------------------------------------------
 887 /* This globs the operations and calls dpkg
 888  *
 889  * If it is called with "OutStatusFd" set to a valid file descriptor
 890  * apt will report the install progress over this fd. It maps the
 891  * dpkg states a package goes through to human readable (and i10n-able)
 892  * names and calculates a percentage for each step.
 893 */
 894 bool pkgDPkgPM::Go(int OutStatusFd)
 895 {
 896    pkgPackageManager::SigINTStop = false;
 897
 898    // Generate the base argument list for dpkg
 899    std::vector<const char *> Args;
 900    unsigned long StartSize = 0;
 901    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 902    {
 903       string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 904       size_t dpkgChrootLen = dpkgChrootDir.length();
 905       if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 906       {
 907          if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 908             --dpkgChrootLen;
 909          Tmp = Tmp.substr(dpkgChrootLen);
 910       }
 911    }
 912    Args.push_back(Tmp.c_str());
 913    StartSize += Tmp.length();
 914
 915    // Stick in any custom dpkg options
 916    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 917    if (Opts != 0)
 918    {
 919       Opts = Opts->Child;
 920       for (; Opts != 0; Opts = Opts->Next)
 921       {
 922          if (Opts->Value.empty() == true)
 923             continue;
 924          Args.push_back(Opts->Value.c_str());
 925          StartSize += Opts->Value.length();
 926       }
 927    }
 928
 929    size_t const BaseArgs = Args.size();
 930    // we need to detect if we can qualify packages with the architecture or not
 931    Args.push_back("--assert-multi-arch");
 932    Args.push_back(NULL);
 933
 934    pid_t dpkgAssertMultiArch = ExecFork();
 935    if (dpkgAssertMultiArch == 0)
 936    {
 937       dpkgChrootDirectory();
 938       // redirect everything to the ultimate sink as we only need the exit-status
 939       int const nullfd = open("/dev/null", O_RDONLY);
 940       dup2(nullfd, STDIN_FILENO);
 941       dup2(nullfd, STDOUT_FILENO);
 942       dup2(nullfd, STDERR_FILENO);
 943       execvp(Args[0], (char**) &Args[0]);
 944       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
 945       _exit(2);
 946    }
 947
 948    fd_set rfds;
 949    struct timespec tv;
 950    sigset_t sigmask;
 951    sigset_t original_sigmask;
 952
 953    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 954    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 955    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 956
 957    if (RunScripts("DPkg::Pre-Invoke") == false)
 958       return false;
 959
 960    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 961       return false;
 962
 963    // support subpressing of triggers processing for special
 964    // cases like d-i that runs the triggers handling manually
 965    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 966    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 967    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 968       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 969
 970    // map the dpkg states to the operations that are performed
 971    // (this is sorted in the same way as Item::Ops)
 972    static const struct DpkgState DpkgStatesOpMap[][7] = {
 973       // Install operation
 974       {
 975          {"half-installed", N_("Preparing %s")},
 976          {"unpacked", N_("Unpacking %s") },
 977          {NULL, NULL}
 978       },
 979       // Configure operation
 980       {
 981          {"unpacked",N_("Preparing to configure %s") },
 982          {"half-configured", N_("Configuring %s") },
 983          { "installed", N_("Installed %s")},
 984          {NULL, NULL}
 985       },
 986       // Remove operation
 987       {
 988          {"half-configured", N_("Preparing for removal of %s")},
 989          {"half-installed", N_("Removing %s")},
 990          {"config-files",  N_("Removed %s")},
 991          {NULL, NULL}
 992       },
 993       // Purge operation
 994       {
 995          {"config-files", N_("Preparing to completely remove %s")},
 996          {"not-installed", N_("Completely removed %s")},
 997          {NULL, NULL}
 998       },
 999    };
1000
1001    // init the PackageOps map, go over the list of packages that
1002    // that will be [installed|configured|removed|purged] and add
1003    // them to the PackageOps map (the dpkg states it goes through)
1004    // and the PackageOpsTranslations (human readable strings)
1005    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1006    {
1007       if((*I).Pkg.end() == true)
1008          continue;
1009
1010       string const name = (*I).Pkg.Name();
1011       PackageOpsDone[name] = 0;
1012       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1013       {
1014          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1015          PackagesTotal++;
1016       }
1017    }
1018
1019    d->stdin_is_dev_null = false;
1020
1021    // create log
1022    OpenLog();
1023
1024    bool dpkgMultiArch = false;
1025    if (dpkgAssertMultiArch > 0)
1026    {
1027       int Status = 0;
1028       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1029       {
1030          if (errno == EINTR)
1031             continue;
1032          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1033          break;
1034       }
1035       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1036          dpkgMultiArch = true;
1037    }
1038
1039    // this loop is runs once per operation
1040    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
1041    {
1042       // Do all actions with the same Op in one run
1043       vector<Item>::const_iterator J = I;
1044       if (TriggersPending == true)
1045          for (; J != List.end(); ++J)
1046          {
1047             if (J->Op == I->Op)
1048                continue;
1049             if (J->Op != Item::TriggersPending)
1050                break;
1051             vector<Item>::const_iterator T = J + 1;
1052             if (T != List.end() && T->Op == I->Op)
1053                continue;
1054             break;
1055          }
1056       else
1057          for (; J != List.end() && J->Op == I->Op; ++J)
1058             /* nothing */;
1059
1060       // keep track of allocated strings for multiarch package names
1061       std::vector<char *> Packages;
1062
1063       // start with the baseset of arguments
1064       unsigned long Size = StartSize;
1065       Args.erase(Args.begin() + BaseArgs, Args.end());
1066
1067       // Now check if we are within the MaxArgs limit
1068       //
1069       // this code below is problematic, because it may happen that
1070       // the argument list is split in a way that A depends on B
1071       // and they are in the same "--configure A B" run
1072       // - with the split they may now be configured in different
1073       //   runs, using Immediate-Configure-All can help prevent this.
1074       if (J - I > (signed)MaxArgs)
1075       {
1076          J = I + MaxArgs;
1077          unsigned long const size = MaxArgs + 10;
1078          Args.reserve(size);
1079          Packages.reserve(size);
1080       }
1081       else
1082       {
1083          unsigned long const size = (J - I) + 10;
1084          Args.reserve(size);
1085          Packages.reserve(size);
1086       }
1087
1088       int fd[2];
1089       if (pipe(fd) != 0)
1090          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1091
1092 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1093 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1094
1095       ADDARGC("--status-fd");
1096       char status_fd_buf[20];
1097       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1098       ADDARG(status_fd_buf);
1099       unsigned long const Op = I->Op;
1100
1101       switch (I->Op)
1102       {
1103          case Item::Remove:
1104          ADDARGC("--force-depends");
1105          ADDARGC("--force-remove-essential");
1106          ADDARGC("--remove");
1107          break;
1108
1109          case Item::Purge:
1110          ADDARGC("--force-depends");
1111          ADDARGC("--force-remove-essential");
1112          ADDARGC("--purge");
1113          break;
1114
1115          case Item::Configure:
1116          ADDARGC("--configure");
1117          break;
1118
1119          case Item::ConfigurePending:
1120          ADDARGC("--configure");
1121          ADDARGC("--pending");
1122          break;
1123
1124          case Item::TriggersPending:
1125          ADDARGC("--triggers-only");
1126          ADDARGC("--pending");
1127          break;
1128
1129          case Item::Install:
1130          ADDARGC("--unpack");
1131          ADDARGC("--auto-deconfigure");
1132          break;
1133       }
1134
1135       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1136           I->Op != Item::ConfigurePending)
1137       {
1138          ADDARGC("--no-triggers");
1139       }
1140 #undef ADDARGC
1141
1142       // Write in the file or package names
1143       if (I->Op == Item::Install)
1144       {
1145          for (;I != J && Size < MaxArgBytes; ++I)
1146          {
1147             if (I->File[0] != '/')
1148                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1149             Args.push_back(I->File.c_str());
1150             Size += I->File.length();
1151          }
1152       }
1153       else
1154       {
1155          string const nativeArch = _config->Find("APT::Architecture");
1156          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1157          for (;I != J && Size < MaxArgBytes; ++I)
1158          {
1159             if((*I).Pkg.end() == true)
1160                continue;
1161             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1162                continue;
1163             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1164             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1165                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1166                                            strcmp(I->Pkg.Arch(), "none") == 0))
1167             {
1168                char const * const name = I->Pkg.Name();
1169                ADDARG(name);
1170             }
1171             else
1172             {
1173                pkgCache::VerIterator PkgVer;
1174                std::string name = I->Pkg.Name();
1175                if (Op == Item::Remove || Op == Item::Purge)
1176                {
1177                   PkgVer = I->Pkg.CurrentVer();
1178                   if(PkgVer.end() == true)
1179                      PkgVer = FindNowVersion(I->Pkg);
1180                }
1181                else
1182                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1183                if (strcmp(I->Pkg.Arch(), "none") == 0)
1184                   ; // never arch-qualify a package without an arch
1185                else if (PkgVer.end() == false)
1186                   name.append(":").append(PkgVer.Arch());
1187                else
1188                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1189                char * const fullname = strdup(name.c_str());
1190                Packages.push_back(fullname);
1191                ADDARG(fullname);
1192             }
1193          }
1194          // skip configure action if all sheduled packages disappeared
1195          if (oldSize == Size)
1196             continue;
1197       }
1198 #undef ADDARG
1199
1200       J = I;
1201
1202       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1203       {
1204          for (std::vector<const char *>::const_iterator a = Args.begin();
1205               a != Args.end(); ++a)
1206             clog << *a << ' ';
1207          clog << endl;
1208          continue;
1209       }
1210       Args.push_back(NULL);
1211
1212       cout << flush;
1213       clog << flush;
1214       cerr << flush;
1215
1216       /* Mask off sig int/quit. We do this because dpkg also does when
1217          it forks scripts. What happens is that when you hit ctrl-c it sends
1218          it to all processes in the group. Since dpkg ignores the signal
1219          it doesn't die but we do! So we must also ignore it */
1220       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1221       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1222
1223       // Check here for any SIGINT
1224       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1225          break;
1226
1227
1228       // ignore SIGHUP as well (debian #463030)
1229       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1230
1231       struct    termios tt;
1232       struct    winsize win;
1233       int       master = -1;
1234       int       slave = -1;
1235
1236       // if tcgetattr does not return zero there was a error
1237       // and we do not do any pty magic
1238       if (tcgetattr(0, &tt) == 0)
1239       {
1240          ioctl(0, TIOCGWINSZ, (char *)&win);
1241          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1242          {
1243             const char *s = _("Can not write log, openpty() "
1244                               "failed (/dev/pts not mounted?)\n");
1245             fprintf(stderr, "%s",s);
1246             if(d->term_out)
1247               fprintf(d->term_out, "%s",s);
1248             master = slave = -1;
1249          }  else {
1250             struct termios rtt;
1251             rtt = tt;
1252             cfmakeraw(&rtt);
1253             rtt.c_lflag &= ~ECHO;
1254             rtt.c_lflag |= ISIG;
1255             // block SIGTTOU during tcsetattr to prevent a hang if
1256             // the process is a member of the background process group
1257             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1258             sigemptyset(&sigmask);
1259             sigaddset(&sigmask, SIGTTOU);
1260             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1261             tcsetattr(0, TCSAFLUSH, &rtt);
1262             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1263          }
1264       }
1265        // Fork dpkg
1266       pid_t Child;
1267       _config->Set("APT::Keep-Fds::",fd[1]);
1268       // send status information that we are about to fork dpkg
1269       if(OutStatusFd > 0) {
1270          ostringstream status;
1271          status << "pmstatus:dpkg-exec:"
1272                 << (PackagesDone/float(PackagesTotal)*100.0)
1273                 << ":" << _("Running dpkg")
1274                 << endl;
1275          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
1276       }
1277       Child = ExecFork();
1278
1279       // This is the child
1280       if (Child == 0)
1281       {
1282          if(slave >= 0 && master >= 0)
1283          {
1284             setsid();
1285             ioctl(slave, TIOCSCTTY, 0);
1286             close(master);
1287             dup2(slave, 0);
1288             dup2(slave, 1);
1289             dup2(slave, 2);
1290             close(slave);
1291          }
1292          close(fd[0]); // close the read end of the pipe
1293
1294          dpkgChrootDirectory();
1295
1296          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1297             _exit(100);
1298
1299          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1300          {
1301             int Flags,dummy;
1302             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1303                _exit(100);
1304
1305             // Discard everything in stdin before forking dpkg
1306             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1307                _exit(100);
1308
1309             while (read(STDIN_FILENO,&dummy,1) == 1);
1310
1311             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1312                _exit(100);
1313          }
1314
1315          /* No Job Control Stop Env is a magic dpkg var that prevents it
1316             from using sigstop */
1317          putenv((char *)"DPKG_NO_TSTP=yes");
1318          execvp(Args[0], (char**) &Args[0]);
1319          cerr << "Could not exec dpkg!" << endl;
1320          _exit(100);
1321       }
1322
1323       // apply ionice
1324       if (_config->FindB("DPkg::UseIoNice", false) == true)
1325          ionice(Child);
1326
1327       // clear the Keep-Fd again
1328       _config->Clear("APT::Keep-Fds",fd[1]);
1329
1330       // Wait for dpkg
1331       int Status = 0;
1332
1333       // we read from dpkg here
1334       int const _dpkgin = fd[0];
1335       close(fd[1]);                        // close the write end of the pipe
1336
1337       if(slave > 0)
1338          close(slave);
1339
1340       // setups fds
1341       sigemptyset(&sigmask);
1342       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1343
1344       /* free vectors (and therefore memory) as we don't need the included data anymore */
1345       for (std::vector<char *>::const_iterator p = Packages.begin();
1346            p != Packages.end(); ++p)
1347          free(*p);
1348       Packages.clear();
1349
1350       // the result of the waitpid call
1351       int res;
1352       int select_ret;
1353       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1354          if(res < 0) {
1355             // FIXME: move this to a function or something, looks ugly here
1356             // error handling, waitpid returned -1
1357             if (errno == EINTR)
1358                continue;
1359             RunScripts("DPkg::Post-Invoke");
1360
1361             // Restore sig int/quit
1362             signal(SIGQUIT,old_SIGQUIT);
1363             signal(SIGINT,old_SIGINT);
1364
1365             signal(SIGHUP,old_SIGHUP);
1366             return _error->Errno("waitpid","Couldn't wait for subprocess");
1367          }
1368
1369          // wait for input or output here
1370          FD_ZERO(&rfds);
1371          if (master >= 0 && !d->stdin_is_dev_null)
1372             FD_SET(0, &rfds);
1373          FD_SET(_dpkgin, &rfds);
1374          if(master >= 0)
1375             FD_SET(master, &rfds);
1376          tv.tv_sec = 1;
1377          tv.tv_nsec = 0;
1378          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1379                               &tv, &original_sigmask);
1380          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1381             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1382                                       NULL, &tv, &original_sigmask);
1383          if (select_ret == 0)
1384             continue;
1385          else if (select_ret < 0 && errno == EINTR)
1386             continue;
1387          else if (select_ret < 0)
1388          {
1389             perror("select() returned error");
1390             continue;
1391          }
1392
1393          if(master >= 0 && FD_ISSET(master, &rfds))
1394             DoTerminalPty(master);
1395          if(master >= 0 && FD_ISSET(0, &rfds))
1396             DoStdin(master);
1397          if(FD_ISSET(_dpkgin, &rfds))
1398             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1399       }
1400       close(_dpkgin);
1401
1402       // Restore sig int/quit
1403       signal(SIGQUIT,old_SIGQUIT);
1404       signal(SIGINT,old_SIGINT);
1405
1406       signal(SIGHUP,old_SIGHUP);
1407
1408       if(master >= 0)
1409       {
1410          tcsetattr(0, TCSAFLUSH, &tt);
1411          close(master);
1412       }
1413
1414       // Check for an error code.
1415       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1416       {
1417          // if it was set to "keep-dpkg-runing" then we won't return
1418          // here but keep the loop going and just report it as a error
1419          // for later
1420          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1421
1422          if(stopOnError)
1423             RunScripts("DPkg::Post-Invoke");
1424
1425          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1426             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1427          else if (WIFEXITED(Status) != 0)
1428             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1429          else
1430             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1431
1432          if(d->dpkg_error.size() > 0)
1433             _error->Error("%s", d->dpkg_error.c_str());
1434
1435          if(stopOnError)
1436          {
1437             CloseLog();
1438             return false;
1439          }
1440       }
1441    }
1442    CloseLog();
1443
1444    if (pkgPackageManager::SigINTStop)
1445        _error->Warning(_("Operation was interrupted before it could finish"));
1446
1447    if (RunScripts("DPkg::Post-Invoke") == false)
1448       return false;
1449
1450    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1451    {
1452       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1453       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1454           unlink(oldpkgcache.c_str()) == 0)
1455       {
1456          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1457          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1458          {
1459             _error->PushToStack();
1460             pkgCacheFile CacheFile;
1461             CacheFile.BuildCaches(NULL, true);
1462             _error->RevertToStack();
1463          }
1464       }
1465    }
1466
1467    Cache.writeStateFile(NULL);
1468    return true;
1469 }
1470
1471 void SigINT(int sig) {
1472    pkgPackageManager::SigINTStop = true;
1473 }
1474                                                                         /*}}}*/
1475 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1476 // ---------------------------------------------------------------------
1477 /* */
1478 void pkgDPkgPM::Reset()
1479 {
1480    List.erase(List.begin(),List.end());
1481 }
1482                                                                         /*}}}*/
1483 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1484 // ---------------------------------------------------------------------
1485 /* */
1486 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1487 {
1488    // If apport doesn't exist or isn't installed do nothing
1489    // This e.g. prevents messages in 'universes' without apport
1490    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1491    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1492       return;
1493
1494    string pkgname, reportfile, srcpkgname, pkgver, arch;
1495    string::size_type pos;
1496    FILE *report;
1497
1498    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1499    {
1500       std::clog << "configured to not write apport reports" << std::endl;
1501       return;
1502    }
1503
1504    // only report the first errors
1505    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1506    {
1507       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1508       return;
1509    }
1510
1511    // check if its not a follow up error
1512    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1513    if(strstr(errormsg, needle) != NULL) {
1514       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1515       return;
1516    }
1517
1518    // do not report disk-full failures
1519    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1520       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1521       return;
1522    }
1523
1524    // do not report out-of-memory failures
1525    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1526       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1527       return;
1528    }
1529
1530    // do not report dpkg I/O errors
1531    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1532    if(strstr(errormsg, "short read in buffer_copy (")) {
1533       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1534       return;
1535    }
1536
1537    // get the pkgname and reportfile
1538    pkgname = flNotDir(pkgpath);
1539    pos = pkgname.find('_');
1540    if(pos != string::npos)
1541       pkgname = pkgname.substr(0, pos);
1542
1543    // find the package versin and source package name
1544    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1545    if (Pkg.end() == true)
1546       return;
1547    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1548    if (Ver.end() == true)
1549       return;
1550    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1551    pkgRecords Recs(Cache);
1552    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1553    srcpkgname = Parse.SourcePkg();
1554    if(srcpkgname.empty())
1555       srcpkgname = pkgname;
1556
1557    // if the file exists already, we check:
1558    // - if it was reported already (touched by apport).
1559    //   If not, we do nothing, otherwise
1560    //    we overwrite it. This is the same behaviour as apport
1561    // - if we have a report with the same pkgversion already
1562    //   then we skip it
1563    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1564    if(FileExists(reportfile))
1565    {
1566       struct stat buf;
1567       char strbuf[255];
1568
1569       // check atime/mtime
1570       stat(reportfile.c_str(), &buf);
1571       if(buf.st_mtime > buf.st_atime)
1572          return;
1573
1574       // check if the existing report is the same version
1575       report = fopen(reportfile.c_str(),"r");
1576       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1577       {
1578          if(strstr(strbuf,"Package:") == strbuf)
1579          {
1580             char pkgname[255], version[255];
1581             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1582                if(strcmp(pkgver.c_str(), version) == 0)
1583                {
1584                   fclose(report);
1585                   return;
1586                }
1587          }
1588       }
1589       fclose(report);
1590    }
1591
1592    // now write the report
1593    arch = _config->Find("APT::Architecture");
1594    report = fopen(reportfile.c_str(),"w");
1595    if(report == NULL)
1596       return;
1597    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1598       chmod(reportfile.c_str(), 0);
1599    else
1600       chmod(reportfile.c_str(), 0600);
1601    fprintf(report, "ProblemType: Package\n");
1602    fprintf(report, "Architecture: %s\n", arch.c_str());
1603    time_t now = time(NULL);
1604    fprintf(report, "Date: %s" , ctime(&now));
1605    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1606    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1607    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1608
1609    // ensure that the log is flushed
1610    if(d->term_out)
1611       fflush(d->term_out);
1612
1613    // attach terminal log it if we have it
1614    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1615    if (!logfile_name.empty())
1616    {
1617       FILE *log = NULL;
1618
1619       fprintf(report, "DpkgTerminalLog:\n");
1620       log = fopen(logfile_name.c_str(),"r");
1621       if(log != NULL)
1622       {
1623          char buf[1024];
1624          while( fgets(buf, sizeof(buf), log) != NULL)
1625             fprintf(report, " %s", buf);
1626          fclose(log);
1627       }
1628    }
1629
1630    // log the ordering
1631    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1632    fprintf(report, "AptOrdering:\n");
1633    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1634       if ((*I).Pkg != NULL)
1635          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1636       else
1637          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1638
1639    // attach dmesg log (to learn about segfaults)
1640    if (FileExists("/bin/dmesg"))
1641    {
1642       fprintf(report, "Dmesg:\n");
1643       FILE *log = popen("/bin/dmesg","r");
1644       if(log != NULL)
1645       {
1646          char buf[1024];
1647          while( fgets(buf, sizeof(buf), log) != NULL)
1648             fprintf(report, " %s", buf);
1649          pclose(log);
1650       }
1651    }
1652
1653    // attach df -l log (to learn about filesystem status)
1654    if (FileExists("/bin/df"))
1655    {
1656
1657       fprintf(report, "Df:\n");
1658       FILE *log = popen("/bin/df -l","r");
1659       if(log != NULL)
1660       {
1661          char buf[1024];
1662          while( fgets(buf, sizeof(buf), log) != NULL)
1663             fprintf(report, " %s", buf);
1664          pclose(log);
1665       }
1666    }
1667
1668    fclose(report);
1669
1670 }
1671                                                                         /*}}}*/