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