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    if (chdir("/") != 0)
 138       _exit(100);
 139 }
 140                                                                         /*}}}*/
 141
 142
 143 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 144 // ---------------------------------------------------------------------
 145 /* This is helpful when a package is no longer installed but has residual
 146  * config files
 147  */
 148 static
 149 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 150 {
 151    pkgCache::VerIterator Ver;
 152    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 153    {
 154       pkgCache::VerFileIterator Vf = Ver.FileList();
 155       pkgCache::PkgFileIterator F = Vf.File();
 156       for (F = Vf.File(); F.end() == false; ++F)
 157       {
 158          if (F && F.Archive())
 159          {
 160             if (strcmp(F.Archive(), "now"))
 161                return Ver;
 162          }
 163       }
 164    }
 165    return Ver;
 166 }
 167                                                                         /*}}}*/
 168
 169 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 170 // ---------------------------------------------------------------------
 171 /* */
 172 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 173    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 174 {
 175    d = new pkgDPkgPMPrivate();
 176 }
 177                                                                         /*}}}*/
 178 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 179 // ---------------------------------------------------------------------
 180 /* */
 181 pkgDPkgPM::~pkgDPkgPM()
 182 {
 183    delete d;
 184 }
 185                                                                         /*}}}*/
 186 // DPkgPM::Install - Install a package                                  /*{{{*/
 187 // ---------------------------------------------------------------------
 188 /* Add an install operation to the sequence list */
 189 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 190 {
 191    if (File.empty() == true || Pkg.end() == true)
 192       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 193
 194    // If the filename string begins with DPkg::Chroot-Directory, return the
 195    // substr that is within the chroot so dpkg can access it.
 196    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 197    if (chrootdir != "/" && File.find(chrootdir) == 0)
 198    {
 199       size_t len = chrootdir.length();
 200       if (chrootdir.at(len - 1) == '/')
 201         len--;
 202       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 203    }
 204    else
 205       List.push_back(Item(Item::Install,Pkg,File));
 206
 207    return true;
 208 }
 209                                                                         /*}}}*/
 210 // DPkgPM::Configure - Configure a package                              /*{{{*/
 211 // ---------------------------------------------------------------------
 212 /* Add a configure operation to the sequence list */
 213 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 214 {
 215    if (Pkg.end() == true)
 216       return false;
 217
 218    List.push_back(Item(Item::Configure, Pkg));
 219
 220    // Use triggers for config calls if we configure "smart"
 221    // as otherwise Pre-Depends will not be satisfied, see #526774
 222    if (_config->FindB("DPkg::TriggersPending", false) == true)
 223       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 224
 225    return true;
 226 }
 227                                                                         /*}}}*/
 228 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 229 // ---------------------------------------------------------------------
 230 /* Add a remove operation to the sequence list */
 231 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 232 {
 233    if (Pkg.end() == true)
 234       return false;
 235
 236    if (Purge == true)
 237       List.push_back(Item(Item::Purge,Pkg));
 238    else
 239       List.push_back(Item(Item::Remove,Pkg));
 240    return true;
 241 }
 242                                                                         /*}}}*/
 243 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 244 // ---------------------------------------------------------------------
 245 /* This is part of the helper script communication interface, it sends
 246    very complete information down to the other end of the pipe.*/
 247 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 248 {
 249    return SendPkgsInfo(F, 2);
 250 }
 251 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 252 {
 253    // This version of APT supports only v3, so don't sent higher versions
 254    if (Version <= 3)
 255       fprintf(F,"VERSION %u\n", Version);
 256    else
 257       fprintf(F,"VERSION 3\n");
 258
 259    /* Write out all of the configuration directives by walking the
 260       configuration tree */
 261    const Configuration::Item *Top = _config->Tree(0);
 262    for (; Top != 0;)
 263    {
 264       if (Top->Value.empty() == false)
 265       {
 266          fprintf(F,"%s=%s\n",
 267                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 268                  QuoteString(Top->Value,"\n").c_str());
 269       }
 270
 271       if (Top->Child != 0)
 272       {
 273          Top = Top->Child;
 274          continue;
 275       }
 276
 277       while (Top != 0 && Top->Next == 0)
 278          Top = Top->Parent;
 279       if (Top != 0)
 280          Top = Top->Next;
 281    }
 282    fprintf(F,"\n");
 283
 284    // Write out the package actions in order.
 285    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 286    {
 287       if(I->Pkg.end() == true)
 288          continue;
 289
 290       pkgDepCache::StateCache &S = Cache[I->Pkg];
 291
 292       fprintf(F,"%s ",I->Pkg.Name());
 293
 294       // Current version which we are going to replace
 295       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 296       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 297          CurVer = FindNowVersion(I->Pkg);
 298
 299       if (CurVer.end() == true)
 300       {
 301          if (Version <= 2)
 302             fprintf(F, "- ");
 303          else
 304             fprintf(F, "- - none ");
 305       }
 306       else
 307       {
 308          fprintf(F, "%s ", CurVer.VerStr());
 309          if (Version >= 3)
 310             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 311       }
 312
 313       // Show the compare operator between current and install version
 314       if (S.InstallVer != 0)
 315       {
 316          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 317          int Comp = 2;
 318          if (CurVer.end() == false)
 319             Comp = InstVer.CompareVer(CurVer);
 320          if (Comp < 0)
 321             fprintf(F,"> ");
 322          else if (Comp == 0)
 323             fprintf(F,"= ");
 324          else if (Comp > 0)
 325             fprintf(F,"< ");
 326          fprintf(F, "%s ", InstVer.VerStr());
 327          if (Version >= 3)
 328             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 329       }
 330       else
 331       {
 332          if (Version <= 2)
 333             fprintf(F, "> - ");
 334          else
 335             fprintf(F, "> - - none ");
 336       }
 337
 338       // Show the filename/operation
 339       if (I->Op == Item::Install)
 340       {
 341          // No errors here..
 342          if (I->File[0] != '/')
 343             fprintf(F,"**ERROR**\n");
 344          else
 345             fprintf(F,"%s\n",I->File.c_str());
 346       }
 347       else if (I->Op == Item::Configure)
 348          fprintf(F,"**CONFIGURE**\n");
 349       else if (I->Op == Item::Remove ||
 350           I->Op == Item::Purge)
 351          fprintf(F,"**REMOVE**\n");
 352
 353       if (ferror(F) != 0)
 354          return false;
 355    }
 356    return true;
 357 }
 358                                                                         /*}}}*/
 359 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 360 // ---------------------------------------------------------------------
 361 /* This looks for a list of scripts to run from the configuration file
 362    each one is run and is fed on standard input a list of all .deb files
 363    that are due to be installed. */
 364 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 365 {
 366    Configuration::Item const *Opts = _config->Tree(Cnf);
 367    if (Opts == 0 || Opts->Child == 0)
 368       return true;
 369    Opts = Opts->Child;
 370
 371    unsigned int Count = 1;
 372    for (; Opts != 0; Opts = Opts->Next, Count++)
 373    {
 374       if (Opts->Value.empty() == true)
 375          continue;
 376
 377       // Determine the protocol version
 378       string OptSec = Opts->Value;
 379       string::size_type Pos;
 380       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 381          Pos = OptSec.length();
 382       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 383
 384       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 385       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 386
 387       // Create the pipes
 388       int Pipes[2];
 389       if (pipe(Pipes) != 0)
 390          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 391       if (InfoFD != (unsigned)Pipes[0])
 392          SetCloseExec(Pipes[0],true);
 393       else
 394          _config->Set("APT::Keep-Fds::", Pipes[0]);
 395       SetCloseExec(Pipes[1],true);
 396
 397       // Purified Fork for running the script
 398       pid_t Process = ExecFork();
 399       if (Process == 0)
 400       {
 401          // Setup the FDs
 402          dup2(Pipes[0], InfoFD);
 403          SetCloseExec(STDOUT_FILENO,false);
 404          SetCloseExec(STDIN_FILENO,false);
 405          SetCloseExec(STDERR_FILENO,false);
 406
 407          string hookfd;
 408          strprintf(hookfd, "%d", InfoFD);
 409          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 410
 411          dpkgChrootDirectory();
 412          const char *Args[4];
 413          Args[0] = "/bin/sh";
 414          Args[1] = "-c";
 415          Args[2] = Opts->Value.c_str();
 416          Args[3] = 0;
 417          execv(Args[0],(char **)Args);
 418          _exit(100);
 419       }
 420       if (InfoFD == (unsigned)Pipes[0])
 421          _config->Clear("APT::Keep-Fds", Pipes[0]);
 422       close(Pipes[0]);
 423       FILE *F = fdopen(Pipes[1],"w");
 424       if (F == 0)
 425          return _error->Errno("fdopen","Faild to open new FD");
 426
 427       // Feed it the filenames.
 428       if (Version <= 1)
 429       {
 430          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 431          {
 432             // Only deal with packages to be installed from .deb
 433             if (I->Op != Item::Install)
 434                continue;
 435
 436             // No errors here..
 437             if (I->File[0] != '/')
 438                continue;
 439
 440             /* Feed the filename of each package that is pending install
 441                into the pipe. */
 442             fprintf(F,"%s\n",I->File.c_str());
 443             if (ferror(F) != 0)
 444                break;
 445          }
 446       }
 447       else
 448          SendPkgsInfo(F, Version);
 449
 450       fclose(F);
 451
 452       // Clean up the sub process
 453       if (ExecWait(Process,Opts->Value.c_str()) == false)
 454          return _error->Error("Failure running script %s",Opts->Value.c_str());
 455    }
 456
 457    return true;
 458 }
 459                                                                         /*}}}*/
 460 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 461 // ---------------------------------------------------------------------
 462 /*
 463 */
 464 void pkgDPkgPM::DoStdin(int master)
 465 {
 466    unsigned char input_buf[256] = {0,};
 467    ssize_t len = read(0, input_buf, sizeof(input_buf));
 468    if (len)
 469       FileFd::Write(master, input_buf, len);
 470    else
 471       d->stdin_is_dev_null = true;
 472 }
 473                                                                         /*}}}*/
 474 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 475 // ---------------------------------------------------------------------
 476 /*
 477  * read the terminal pty and write log
 478  */
 479 void pkgDPkgPM::DoTerminalPty(int master)
 480 {
 481    unsigned char term_buf[1024] = {0,0, };
 482
 483    ssize_t len=read(master, term_buf, sizeof(term_buf));
 484    if(len == -1 && errno == EIO)
 485    {
 486       // this happens when the child is about to exit, we
 487       // give it time to actually exit, otherwise we run
 488       // into a race so we sleep for half a second.
 489       struct timespec sleepfor = { 0, 500000000 };
 490       nanosleep(&sleepfor, NULL);
 491       return;
 492    }
 493    if(len <= 0)
 494       return;
 495    FileFd::Write(1, term_buf, len);
 496    if(d->term_out)
 497       fwrite(term_buf, len, sizeof(char), d->term_out);
 498 }
 499                                                                         /*}}}*/
 500 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 501 // ---------------------------------------------------------------------
 502 /*
 503  */
 504 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 505 {
 506    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 507    // the status we output
 508    ostringstream status;
 509
 510    if (Debug == true)
 511       std::clog << "got from dpkg '" << line << "'" << std::endl;
 512
 513
 514    /* dpkg sends strings like this:
 515       'status:   <pkg>:  <pkg  qstate>'
 516       errors look like this:
 517       '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
 518       and conffile-prompt like this
 519       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 520
 521       Newer versions of dpkg sent also:
 522       'processing: install: pkg'
 523       'processing: configure: pkg'
 524       'processing: remove: pkg'
 525       'processing: purge: pkg'
 526       'processing: disappear: pkg'
 527       'processing: trigproc: trigger'
 528
 529    */
 530    char* list[6];
 531    //        dpkg sends multiline error messages sometimes (see
 532    //        #374195 for a example. we should support this by
 533    //        either patching dpkg to not send multiline over the
 534    //        statusfd or by rewriting the code here to deal with
 535    //        it. for now we just ignore it and not crash
 536    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 537    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 538    {
 539       if (Debug == true)
 540          std::clog << "ignoring line: not enough ':'" << std::endl;
 541       return;
 542    }
 543    const char* const pkg = list[1];
 544    const char* action = _strstrip(list[2]);
 545
 546    // 'processing' from dpkg looks like
 547    // 'processing: action: pkg'
 548    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 549    {
 550       char s[200];
 551       const char* const pkg_or_trigger = _strstrip(list[2]);
 552       action = _strstrip( list[1]);
 553       const std::pair<const char *, const char *> * const iter =
 554         std::find_if(PackageProcessingOpsBegin,
 555                      PackageProcessingOpsEnd,
 556                      MatchProcessingOp(action));
 557       if(iter == PackageProcessingOpsEnd)
 558       {
 559          if (Debug == true)
 560             std::clog << "ignoring unknown action: " << action << std::endl;
 561          return;
 562       }
 563       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 564
 565       status << "pmstatus:" << pkg_or_trigger
 566              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 567              << ":" << s
 568              << endl;
 569       if(OutStatusFd > 0)
 570          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 571       if (Debug == true)
 572          std::clog << "send: '" << status.str() << "'" << endl;
 573
 574       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 575          handleDisappearAction(pkg_or_trigger);
 576       return;
 577    }
 578
 579    if(strncmp(action,"error",strlen("error")) == 0)
 580    {
 581       // urgs, sometime has ":" in its error string so that we
 582       // end up with the error message split between list[3]
 583       // and list[4], e.g. the message:
 584       // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 585       // concat them again
 586       if( list[4] != NULL )
 587          list[3][strlen(list[3])] = ':';
 588
 589       status << "pmerror:" << list[1]
 590              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 591              << ":" << list[3]
 592              << endl;
 593       if(OutStatusFd > 0)
 594          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 595       if (Debug == true)
 596          std::clog << "send: '" << status.str() << "'" << endl;
 597       pkgFailures++;
 598       WriteApportReport(list[1], list[3]);
 599       return;
 600    }
 601    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 602    {
 603       status << "pmconffile:" << list[1]
 604              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 605              << ":" << list[3]
 606              << endl;
 607       if(OutStatusFd > 0)
 608          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 609       if (Debug == true)
 610          std::clog << "send: '" << status.str() << "'" << endl;
 611       return;
 612    }
 613
 614    vector<struct DpkgState> const &states = PackageOps[pkg];
 615    const char *next_action = NULL;
 616    if(PackageOpsDone[pkg] < states.size())
 617       next_action = states[PackageOpsDone[pkg]].state;
 618    // check if the package moved to the next dpkg state
 619    if(next_action && (strcmp(action, next_action) == 0))
 620    {
 621       // only read the translation if there is actually a next
 622       // action
 623       const char *translation = _(states[PackageOpsDone[pkg]].str);
 624       char s[200];
 625       snprintf(s, sizeof(s), translation, pkg);
 626
 627       // we moved from one dpkg state to a new one, report that
 628       PackageOpsDone[pkg]++;
 629       PackagesDone++;
 630       // build the status str
 631       status << "pmstatus:" << pkg
 632              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 633              << ":" << s
 634              << endl;
 635       if(_config->FindB("DPkgPM::Progress", false) == true)
 636          SendTerminalProgress(PackagesDone/float(PackagesTotal)*100.0);
 637
 638       if(OutStatusFd > 0)
 639          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
 640       if (Debug == true)
 641          std::clog << "send: '" << status.str() << "'" << endl;
 642    }
 643    if (Debug == true)
 644       std::clog << "(parsed from dpkg) pkg: " << pkg
 645                 << " action: " << action << endl;
 646 }
 647                                                                         /*}}}*/
 648 // DPkgPM::handleDisappearAction                                        /*{{{*/
 649 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 650 {
 651    // record the package name for display and stuff later
 652    disappearedPkgs.insert(pkgname);
 653
 654    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 655    if (unlikely(Pkg.end() == true))
 656       return;
 657    // the disappeared package was auto-installed - nothing to do
 658    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 659       return;
 660    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 661    if (unlikely(PkgVer.end() == true))
 662       return;
 663    /* search in the list of dependencies for (Pre)Depends,
 664       check if this dependency has a Replaces on our package
 665       and if so transfer the manual installed flag to it */
 666    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 667    {
 668       if (Dep->Type != pkgCache::Dep::Depends &&
 669           Dep->Type != pkgCache::Dep::PreDepends)
 670          continue;
 671       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 672       if (unlikely(Tar.end() == true))
 673          continue;
 674       // the package is already marked as manual
 675       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 676          continue;
 677       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 678       if (TarVer.end() == true)
 679          continue;
 680       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 681       {
 682          if (Rep->Type != pkgCache::Dep::Replaces)
 683             continue;
 684          if (Pkg != Rep.TargetPkg())
 685             continue;
 686          // okay, they are strongly connected - transfer manual-bit
 687          if (Debug == true)
 688             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 689          Cache[Tar].Flags &= ~Flag::Auto;
 690          break;
 691       }
 692    }
 693 }
 694                                                                         /*}}}*/
 695 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 696 // ---------------------------------------------------------------------
 697 /*
 698  */
 699 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 700 {
 701    char *p, *q;
 702    int len;
 703
 704    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 705    d->dpkgbuf_pos += len;
 706    if(len <= 0)
 707       return;
 708
 709    // process line by line if we have a buffer
 710    p = q = d->dpkgbuf;
 711    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 712    {
 713       *q = 0;
 714       ProcessDpkgStatusLine(OutStatusFd, p);
 715       p=q+1; // continue with next line
 716    }
 717
 718    // now move the unprocessed bits (after the final \n that is now a 0x0)
 719    // to the start and update d->dpkgbuf_pos
 720    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 721    if(p == NULL)
 722       return;
 723
 724    // we are interessted in the first char *after* 0x0
 725    p++;
 726
 727    // move the unprocessed tail to the start and update pos
 728    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 729    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 730 }
 731                                                                         /*}}}*/
 732 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 733 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 734 {
 735    size_t const length = value.length();
 736    if (length == 0)
 737       return;
 738    // poor mans rstrip(", ")
 739    if (value[length-2] == ',' && value[length-1] == ' ')
 740       value.erase(length - 2, 2);
 741    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 742 }                                                                       /*}}}*/
 743 // DPkgPM::OpenLog                                                      /*{{{*/
 744 bool pkgDPkgPM::OpenLog()
 745 {
 746    string const logdir = _config->FindDir("Dir::Log");
 747    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 748       // FIXME: use a better string after freeze
 749       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 750
 751    // get current time
 752    char timestr[200];
 753    time_t const t = time(NULL);
 754    struct tm const * const tmp = localtime(&t);
 755    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 756
 757    // open terminal log
 758    string const logfile_name = flCombine(logdir,
 759                                    _config->Find("Dir::Log::Terminal"));
 760    if (!logfile_name.empty())
 761    {
 762       d->term_out = fopen(logfile_name.c_str(),"a");
 763       if (d->term_out == NULL)
 764          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 765       setvbuf(d->term_out, NULL, _IONBF, 0);
 766       SetCloseExec(fileno(d->term_out), true);
 767       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 768       {
 769          struct passwd *pw = getpwnam("root");
 770          struct group *gr = getgrnam("adm");
 771          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 772             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 773       }
 774       if (chmod(logfile_name.c_str(), 0640) != 0)
 775          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 776       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 777    }
 778
 779    // write your history
 780    string const history_name = flCombine(logdir,
 781                                    _config->Find("Dir::Log::History"));
 782    if (!history_name.empty())
 783    {
 784       d->history_out = fopen(history_name.c_str(),"a");
 785       if (d->history_out == NULL)
 786          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 787       SetCloseExec(fileno(d->history_out), true);
 788       chmod(history_name.c_str(), 0644);
 789       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 790       string remove, purge, install, reinstall, upgrade, downgrade;
 791       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 792       {
 793          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 794          string *line = NULL;
 795          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 796          if (Cache[I].NewInstall() == true)
 797             HISTORYINFO(install, CANDIDATE_AUTO)
 798          else if (Cache[I].ReInstall() == true)
 799             HISTORYINFO(reinstall, CANDIDATE)
 800          else if (Cache[I].Upgrade() == true)
 801             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 802          else if (Cache[I].Downgrade() == true)
 803             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 804          else if (Cache[I].Delete() == true)
 805             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 806          else
 807             continue;
 808          #undef HISTORYINFO
 809          line->append(I.FullName(false)).append(" (");
 810          switch (infostring) {
 811          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 812          case CANDIDATE_AUTO:
 813             line->append(Cache[I].CandVersion);
 814             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 815                line->append(", automatic");
 816             break;
 817          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 818          case CURRENT: line->append(Cache[I].CurVersion); break;
 819          }
 820          line->append("), ");
 821       }
 822       if (_config->Exists("Commandline::AsString") == true)
 823          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 824       WriteHistoryTag("Install", install);
 825       WriteHistoryTag("Reinstall", reinstall);
 826       WriteHistoryTag("Upgrade", upgrade);
 827       WriteHistoryTag("Downgrade",downgrade);
 828       WriteHistoryTag("Remove",remove);
 829       WriteHistoryTag("Purge",purge);
 830       fflush(d->history_out);
 831    }
 832
 833    return true;
 834 }
 835                                                                         /*}}}*/
 836 // DPkg::CloseLog                                                       /*{{{*/
 837 bool pkgDPkgPM::CloseLog()
 838 {
 839    char timestr[200];
 840    time_t t = time(NULL);
 841    struct tm *tmp = localtime(&t);
 842    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 843
 844    if(d->term_out)
 845    {
 846       fprintf(d->term_out, "Log ended: ");
 847       fprintf(d->term_out, "%s", timestr);
 848       fprintf(d->term_out, "\n");
 849       fclose(d->term_out);
 850    }
 851    d->term_out = NULL;
 852
 853    if(d->history_out)
 854    {
 855       if (disappearedPkgs.empty() == false)
 856       {
 857          string disappear;
 858          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 859               d != disappearedPkgs.end(); ++d)
 860          {
 861             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 862             disappear.append(*d);
 863             if (P.end() == true)
 864                disappear.append(", ");
 865             else
 866                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 867          }
 868          WriteHistoryTag("Disappeared", disappear);
 869       }
 870       if (d->dpkg_error.empty() == false)
 871          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 872       fprintf(d->history_out, "End-Date: %s\n", timestr);
 873       fclose(d->history_out);
 874    }
 875    d->history_out = NULL;
 876
 877    return true;
 878 }
 879                                                                         /*}}}*/
 880 // DPkgPM::SendTerminalProgress                                         /*{{{*/
 881 // ---------------------------------------------------------------------
 882 /* Send progress info to the terminal
 883  */
 884 void pkgDPkgPM::SendTerminalProgress(float percentage)
 885 {
 886    // FIXME: use colors too
 887    std::cout << "\r\n"
 888              << "Progress: [" << percentage << "%]"
 889              << "\r\n";
 890 }
 891                                                                         /*}}}*/
 892 /*{{{*/
 893 // This implements a racy version of pselect for those architectures
 894 // that don't have a working implementation.
 895 // FIXME: Probably can be removed on Lenny+1
 896 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 897    fd_set *exceptfds, const struct timespec *timeout,
 898    const sigset_t *sigmask)
 899 {
 900    sigset_t origmask;
 901    struct timeval tv;
 902    int retval;
 903
 904    tv.tv_sec = timeout->tv_sec;
 905    tv.tv_usec = timeout->tv_nsec/1000;
 906
 907    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 908    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 909    sigprocmask(SIG_SETMASK, &origmask, 0);
 910    return retval;
 911 }
 912 /*}}}*/
 913 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 914 // ---------------------------------------------------------------------
 915 /* This globs the operations and calls dpkg
 916  *
 917  * If it is called with "OutStatusFd" set to a valid file descriptor
 918  * apt will report the install progress over this fd. It maps the
 919  * dpkg states a package goes through to human readable (and i10n-able)
 920  * names and calculates a percentage for each step.
 921 */
 922 bool pkgDPkgPM::Go(int OutStatusFd)
 923 {
 924    pkgPackageManager::SigINTStop = false;
 925
 926    // Generate the base argument list for dpkg
 927    std::vector<const char *> Args;
 928    unsigned long StartSize = 0;
 929    string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 930    {
 931       string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
 932       size_t dpkgChrootLen = dpkgChrootDir.length();
 933       if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
 934       {
 935          if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
 936             --dpkgChrootLen;
 937          Tmp = Tmp.substr(dpkgChrootLen);
 938       }
 939    }
 940    Args.push_back(Tmp.c_str());
 941    StartSize += Tmp.length();
 942
 943    // Stick in any custom dpkg options
 944    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 945    if (Opts != 0)
 946    {
 947       Opts = Opts->Child;
 948       for (; Opts != 0; Opts = Opts->Next)
 949       {
 950          if (Opts->Value.empty() == true)
 951             continue;
 952          Args.push_back(Opts->Value.c_str());
 953          StartSize += Opts->Value.length();
 954       }
 955    }
 956
 957    size_t const BaseArgs = Args.size();
 958    // we need to detect if we can qualify packages with the architecture or not
 959    Args.push_back("--assert-multi-arch");
 960    Args.push_back(NULL);
 961
 962    pid_t dpkgAssertMultiArch = ExecFork();
 963    if (dpkgAssertMultiArch == 0)
 964    {
 965       dpkgChrootDirectory();
 966       // redirect everything to the ultimate sink as we only need the exit-status
 967       int const nullfd = open("/dev/null", O_RDONLY);
 968       dup2(nullfd, STDIN_FILENO);
 969       dup2(nullfd, STDOUT_FILENO);
 970       dup2(nullfd, STDERR_FILENO);
 971       execvp(Args[0], (char**) &Args[0]);
 972       _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
 973       _exit(2);
 974    }
 975
 976    fd_set rfds;
 977    struct timespec tv;
 978    sigset_t sigmask;
 979    sigset_t original_sigmask;
 980
 981    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 982    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 983    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 984
 985    if (RunScripts("DPkg::Pre-Invoke") == false)
 986       return false;
 987
 988    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 989       return false;
 990
 991    // support subpressing of triggers processing for special
 992    // cases like d-i that runs the triggers handling manually
 993    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 994    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 995    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 996       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 997
 998    // map the dpkg states to the operations that are performed
 999    // (this is sorted in the same way as Item::Ops)
1000    static const struct DpkgState DpkgStatesOpMap[][7] = {
1001       // Install operation
1002       {
1003          {"half-installed", N_("Preparing %s")},
1004          {"unpacked", N_("Unpacking %s") },
1005          {NULL, NULL}
1006       },
1007       // Configure operation
1008       {
1009          {"unpacked",N_("Preparing to configure %s") },
1010          {"half-configured", N_("Configuring %s") },
1011          { "installed", N_("Installed %s")},
1012          {NULL, NULL}
1013       },
1014       // Remove operation
1015       {
1016          {"half-configured", N_("Preparing for removal of %s")},
1017          {"half-installed", N_("Removing %s")},
1018          {"config-files",  N_("Removed %s")},
1019          {NULL, NULL}
1020       },
1021       // Purge operation
1022       {
1023          {"config-files", N_("Preparing to completely remove %s")},
1024          {"not-installed", N_("Completely removed %s")},
1025          {NULL, NULL}
1026       },
1027    };
1028
1029    // init the PackageOps map, go over the list of packages that
1030    // that will be [installed|configured|removed|purged] and add
1031    // them to the PackageOps map (the dpkg states it goes through)
1032    // and the PackageOpsTranslations (human readable strings)
1033    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1034    {
1035       if((*I).Pkg.end() == true)
1036          continue;
1037
1038       string const name = (*I).Pkg.Name();
1039       PackageOpsDone[name] = 0;
1040       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1041       {
1042          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1043          PackagesTotal++;
1044       }
1045    }
1046
1047    d->stdin_is_dev_null = false;
1048
1049    // create log
1050    OpenLog();
1051
1052    bool dpkgMultiArch = false;
1053    if (dpkgAssertMultiArch > 0)
1054    {
1055       int Status = 0;
1056       while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
1057       {
1058          if (errno == EINTR)
1059             continue;
1060          _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
1061          break;
1062       }
1063       if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
1064          dpkgMultiArch = true;
1065    }
1066
1067    // this loop is runs once per operation
1068    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
1069    {
1070       // Do all actions with the same Op in one run
1071       vector<Item>::const_iterator J = I;
1072       if (TriggersPending == true)
1073          for (; J != List.end(); ++J)
1074          {
1075             if (J->Op == I->Op)
1076                continue;
1077             if (J->Op != Item::TriggersPending)
1078                break;
1079             vector<Item>::const_iterator T = J + 1;
1080             if (T != List.end() && T->Op == I->Op)
1081                continue;
1082             break;
1083          }
1084       else
1085          for (; J != List.end() && J->Op == I->Op; ++J)
1086             /* nothing */;
1087
1088       // keep track of allocated strings for multiarch package names
1089       std::vector<char *> Packages;
1090
1091       // start with the baseset of arguments
1092       unsigned long Size = StartSize;
1093       Args.erase(Args.begin() + BaseArgs, Args.end());
1094
1095       // Now check if we are within the MaxArgs limit
1096       //
1097       // this code below is problematic, because it may happen that
1098       // the argument list is split in a way that A depends on B
1099       // and they are in the same "--configure A B" run
1100       // - with the split they may now be configured in different
1101       //   runs, using Immediate-Configure-All can help prevent this.
1102       if (J - I > (signed)MaxArgs)
1103       {
1104          J = I + MaxArgs;
1105          unsigned long const size = MaxArgs + 10;
1106          Args.reserve(size);
1107          Packages.reserve(size);
1108       }
1109       else
1110       {
1111          unsigned long const size = (J - I) + 10;
1112          Args.reserve(size);
1113          Packages.reserve(size);
1114       }
1115
1116       int fd[2];
1117       if (pipe(fd) != 0)
1118          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1119
1120 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1121 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1122
1123       ADDARGC("--status-fd");
1124       char status_fd_buf[20];
1125       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1126       ADDARG(status_fd_buf);
1127       unsigned long const Op = I->Op;
1128
1129       switch (I->Op)
1130       {
1131          case Item::Remove:
1132          ADDARGC("--force-depends");
1133          ADDARGC("--force-remove-essential");
1134          ADDARGC("--remove");
1135          break;
1136
1137          case Item::Purge:
1138          ADDARGC("--force-depends");
1139          ADDARGC("--force-remove-essential");
1140          ADDARGC("--purge");
1141          break;
1142
1143          case Item::Configure:
1144          ADDARGC("--configure");
1145          break;
1146
1147          case Item::ConfigurePending:
1148          ADDARGC("--configure");
1149          ADDARGC("--pending");
1150          break;
1151
1152          case Item::TriggersPending:
1153          ADDARGC("--triggers-only");
1154          ADDARGC("--pending");
1155          break;
1156
1157          case Item::Install:
1158          ADDARGC("--unpack");
1159          ADDARGC("--auto-deconfigure");
1160          break;
1161       }
1162
1163       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1164           I->Op != Item::ConfigurePending)
1165       {
1166          ADDARGC("--no-triggers");
1167       }
1168 #undef ADDARGC
1169
1170       // Write in the file or package names
1171       if (I->Op == Item::Install)
1172       {
1173          for (;I != J && Size < MaxArgBytes; ++I)
1174          {
1175             if (I->File[0] != '/')
1176                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1177             Args.push_back(I->File.c_str());
1178             Size += I->File.length();
1179          }
1180       }
1181       else
1182       {
1183          string const nativeArch = _config->Find("APT::Architecture");
1184          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1185          for (;I != J && Size < MaxArgBytes; ++I)
1186          {
1187             if((*I).Pkg.end() == true)
1188                continue;
1189             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1190                continue;
1191             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1192             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1193                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1194                                            strcmp(I->Pkg.Arch(), "none") == 0))
1195             {
1196                char const * const name = I->Pkg.Name();
1197                ADDARG(name);
1198             }
1199             else
1200             {
1201                pkgCache::VerIterator PkgVer;
1202                std::string name = I->Pkg.Name();
1203                if (Op == Item::Remove || Op == Item::Purge)
1204                {
1205                   PkgVer = I->Pkg.CurrentVer();
1206                   if(PkgVer.end() == true)
1207                      PkgVer = FindNowVersion(I->Pkg);
1208                }
1209                else
1210                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1211                if (strcmp(I->Pkg.Arch(), "none") == 0)
1212                   ; // never arch-qualify a package without an arch
1213                else if (PkgVer.end() == false)
1214                   name.append(":").append(PkgVer.Arch());
1215                else
1216                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1217                char * const fullname = strdup(name.c_str());
1218                Packages.push_back(fullname);
1219                ADDARG(fullname);
1220             }
1221          }
1222          // skip configure action if all sheduled packages disappeared
1223          if (oldSize == Size)
1224             continue;
1225       }
1226 #undef ADDARG
1227
1228       J = I;
1229
1230       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1231       {
1232          for (std::vector<const char *>::const_iterator a = Args.begin();
1233               a != Args.end(); ++a)
1234             clog << *a << ' ';
1235          clog << endl;
1236          continue;
1237       }
1238       Args.push_back(NULL);
1239
1240       cout << flush;
1241       clog << flush;
1242       cerr << flush;
1243
1244       /* Mask off sig int/quit. We do this because dpkg also does when
1245          it forks scripts. What happens is that when you hit ctrl-c it sends
1246          it to all processes in the group. Since dpkg ignores the signal
1247          it doesn't die but we do! So we must also ignore it */
1248       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1249       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1250
1251       // Check here for any SIGINT
1252       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1253          break;
1254
1255
1256       // ignore SIGHUP as well (debian #463030)
1257       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1258
1259       struct    termios tt;
1260       struct    winsize win;
1261       int       master = -1;
1262       int       slave = -1;
1263
1264       // if tcgetattr does not return zero there was a error
1265       // and we do not do any pty magic
1266       _error->PushToStack();
1267       if (tcgetattr(STDOUT_FILENO, &tt) == 0)
1268       {
1269          ioctl(0, TIOCGWINSZ, (char *)&win);
1270          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1271          {
1272             _error->Errno("openpty", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1273             master = slave = -1;
1274          }  else {
1275             struct termios rtt;
1276             rtt = tt;
1277             cfmakeraw(&rtt);
1278             rtt.c_lflag &= ~ECHO;
1279             rtt.c_lflag |= ISIG;
1280             // block SIGTTOU during tcsetattr to prevent a hang if
1281             // the process is a member of the background process group
1282             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1283             sigemptyset(&sigmask);
1284             sigaddset(&sigmask, SIGTTOU);
1285             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1286             tcsetattr(0, TCSAFLUSH, &rtt);
1287             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1288          }
1289       }
1290       // complain only if stdout is either a terminal (but still failed) or is an invalid
1291       // descriptor otherwise we would complain about redirection to e.g. /dev/null as well.
1292       else if (isatty(STDOUT_FILENO) == 1 || errno == EBADF)
1293          _error->Errno("tcgetattr", _("Can not write log (%s)"), _("Is stdout a terminal?"));
1294
1295       if (_error->PendingError() == true)
1296          _error->DumpErrors(std::cerr);
1297       _error->RevertToStack();
1298
1299        // Fork dpkg
1300       pid_t Child;
1301       _config->Set("APT::Keep-Fds::",fd[1]);
1302       // send status information that we are about to fork dpkg
1303       if(OutStatusFd > 0) {
1304          ostringstream status;
1305          status << "pmstatus:dpkg-exec:"
1306                 << (PackagesDone/float(PackagesTotal)*100.0)
1307                 << ":" << _("Running dpkg")
1308                 << endl;
1309          FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
1310       }
1311       Child = ExecFork();
1312
1313       // This is the child
1314       if (Child == 0)
1315       {
1316          if(slave >= 0 && master >= 0)
1317          {
1318             setsid();
1319             ioctl(slave, TIOCSCTTY, 0);
1320             close(master);
1321             dup2(slave, 0);
1322             dup2(slave, 1);
1323             dup2(slave, 2);
1324             close(slave);
1325          }
1326          close(fd[0]); // close the read end of the pipe
1327
1328          dpkgChrootDirectory();
1329
1330          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1331             _exit(100);
1332
1333          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1334          {
1335             int Flags,dummy;
1336             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1337                _exit(100);
1338
1339             // Discard everything in stdin before forking dpkg
1340             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1341                _exit(100);
1342
1343             while (read(STDIN_FILENO,&dummy,1) == 1);
1344
1345             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1346                _exit(100);
1347          }
1348
1349          /* No Job Control Stop Env is a magic dpkg var that prevents it
1350             from using sigstop */
1351          putenv((char *)"DPKG_NO_TSTP=yes");
1352          execvp(Args[0], (char**) &Args[0]);
1353          cerr << "Could not exec dpkg!" << endl;
1354          _exit(100);
1355       }
1356
1357       // apply ionice
1358       if (_config->FindB("DPkg::UseIoNice", false) == true)
1359          ionice(Child);
1360
1361       // clear the Keep-Fd again
1362       _config->Clear("APT::Keep-Fds",fd[1]);
1363
1364       // Wait for dpkg
1365       int Status = 0;
1366
1367       // we read from dpkg here
1368       int const _dpkgin = fd[0];
1369       close(fd[1]);                        // close the write end of the pipe
1370
1371       if(slave > 0)
1372          close(slave);
1373
1374       // setups fds
1375       sigemptyset(&sigmask);
1376       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1377
1378       /* free vectors (and therefore memory) as we don't need the included data anymore */
1379       for (std::vector<char *>::const_iterator p = Packages.begin();
1380            p != Packages.end(); ++p)
1381          free(*p);
1382       Packages.clear();
1383
1384       // the result of the waitpid call
1385       int res;
1386       int select_ret;
1387       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1388          if(res < 0) {
1389             // FIXME: move this to a function or something, looks ugly here
1390             // error handling, waitpid returned -1
1391             if (errno == EINTR)
1392                continue;
1393             RunScripts("DPkg::Post-Invoke");
1394
1395             // Restore sig int/quit
1396             signal(SIGQUIT,old_SIGQUIT);
1397             signal(SIGINT,old_SIGINT);
1398
1399             signal(SIGHUP,old_SIGHUP);
1400             return _error->Errno("waitpid","Couldn't wait for subprocess");
1401          }
1402
1403          // wait for input or output here
1404          FD_ZERO(&rfds);
1405          if (master >= 0 && !d->stdin_is_dev_null)
1406             FD_SET(0, &rfds);
1407          FD_SET(_dpkgin, &rfds);
1408          if(master >= 0)
1409             FD_SET(master, &rfds);
1410          tv.tv_sec = 1;
1411          tv.tv_nsec = 0;
1412          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1413                               &tv, &original_sigmask);
1414          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1415             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1416                                       NULL, &tv, &original_sigmask);
1417          if (select_ret == 0)
1418             continue;
1419          else if (select_ret < 0 && errno == EINTR)
1420             continue;
1421          else if (select_ret < 0)
1422          {
1423             perror("select() returned error");
1424             continue;
1425          }
1426
1427          if(master >= 0 && FD_ISSET(master, &rfds))
1428             DoTerminalPty(master);
1429          if(master >= 0 && FD_ISSET(0, &rfds))
1430             DoStdin(master);
1431          if(FD_ISSET(_dpkgin, &rfds))
1432             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1433       }
1434       close(_dpkgin);
1435
1436       // Restore sig int/quit
1437       signal(SIGQUIT,old_SIGQUIT);
1438       signal(SIGINT,old_SIGINT);
1439
1440       signal(SIGHUP,old_SIGHUP);
1441
1442       if(master >= 0)
1443       {
1444          tcsetattr(0, TCSAFLUSH, &tt);
1445          close(master);
1446       }
1447
1448       // Check for an error code.
1449       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1450       {
1451          // if it was set to "keep-dpkg-runing" then we won't return
1452          // here but keep the loop going and just report it as a error
1453          // for later
1454          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1455
1456          if(stopOnError)
1457             RunScripts("DPkg::Post-Invoke");
1458
1459          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1460             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1461          else if (WIFEXITED(Status) != 0)
1462             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1463          else
1464             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1465
1466          if(d->dpkg_error.size() > 0)
1467             _error->Error("%s", d->dpkg_error.c_str());
1468
1469          if(stopOnError)
1470          {
1471             CloseLog();
1472             return false;
1473          }
1474       }
1475    }
1476    CloseLog();
1477
1478    if (pkgPackageManager::SigINTStop)
1479        _error->Warning(_("Operation was interrupted before it could finish"));
1480
1481    if (RunScripts("DPkg::Post-Invoke") == false)
1482       return false;
1483
1484    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1485    {
1486       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1487       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1488           unlink(oldpkgcache.c_str()) == 0)
1489       {
1490          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1491          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1492          {
1493             _error->PushToStack();
1494             pkgCacheFile CacheFile;
1495             CacheFile.BuildCaches(NULL, true);
1496             _error->RevertToStack();
1497          }
1498       }
1499    }
1500
1501    Cache.writeStateFile(NULL);
1502    return true;
1503 }
1504
1505 void SigINT(int sig) {
1506    pkgPackageManager::SigINTStop = true;
1507 }
1508                                                                         /*}}}*/
1509 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1510 // ---------------------------------------------------------------------
1511 /* */
1512 void pkgDPkgPM::Reset()
1513 {
1514    List.erase(List.begin(),List.end());
1515 }
1516                                                                         /*}}}*/
1517 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1518 // ---------------------------------------------------------------------
1519 /* */
1520 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1521 {
1522    // If apport doesn't exist or isn't installed do nothing
1523    // This e.g. prevents messages in 'universes' without apport
1524    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1525    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1526       return;
1527
1528    string pkgname, reportfile, srcpkgname, pkgver, arch;
1529    string::size_type pos;
1530    FILE *report;
1531
1532    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1533    {
1534       std::clog << "configured to not write apport reports" << std::endl;
1535       return;
1536    }
1537
1538    // only report the first errors
1539    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1540    {
1541       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1542       return;
1543    }
1544
1545    // check if its not a follow up error
1546    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1547    if(strstr(errormsg, needle) != NULL) {
1548       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1549       return;
1550    }
1551
1552    // do not report disk-full failures
1553    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1554       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1555       return;
1556    }
1557
1558    // do not report out-of-memory failures
1559    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1560       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1561       return;
1562    }
1563
1564    // do not report dpkg I/O errors
1565    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1566    if(strstr(errormsg, "short read in buffer_copy (")) {
1567       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1568       return;
1569    }
1570
1571    // get the pkgname and reportfile
1572    pkgname = flNotDir(pkgpath);
1573    pos = pkgname.find('_');
1574    if(pos != string::npos)
1575       pkgname = pkgname.substr(0, pos);
1576
1577    // find the package versin and source package name
1578    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1579    if (Pkg.end() == true)
1580       return;
1581    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1582    if (Ver.end() == true)
1583       return;
1584    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1585    pkgRecords Recs(Cache);
1586    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1587    srcpkgname = Parse.SourcePkg();
1588    if(srcpkgname.empty())
1589       srcpkgname = pkgname;
1590
1591    // if the file exists already, we check:
1592    // - if it was reported already (touched by apport).
1593    //   If not, we do nothing, otherwise
1594    //    we overwrite it. This is the same behaviour as apport
1595    // - if we have a report with the same pkgversion already
1596    //   then we skip it
1597    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1598    if(FileExists(reportfile))
1599    {
1600       struct stat buf;
1601       char strbuf[255];
1602
1603       // check atime/mtime
1604       stat(reportfile.c_str(), &buf);
1605       if(buf.st_mtime > buf.st_atime)
1606          return;
1607
1608       // check if the existing report is the same version
1609       report = fopen(reportfile.c_str(),"r");
1610       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1611       {
1612          if(strstr(strbuf,"Package:") == strbuf)
1613          {
1614             char pkgname[255], version[255];
1615             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1616                if(strcmp(pkgver.c_str(), version) == 0)
1617                {
1618                   fclose(report);
1619                   return;
1620                }
1621          }
1622       }
1623       fclose(report);
1624    }
1625
1626    // now write the report
1627    arch = _config->Find("APT::Architecture");
1628    report = fopen(reportfile.c_str(),"w");
1629    if(report == NULL)
1630       return;
1631    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1632       chmod(reportfile.c_str(), 0);
1633    else
1634       chmod(reportfile.c_str(), 0600);
1635    fprintf(report, "ProblemType: Package\n");
1636    fprintf(report, "Architecture: %s\n", arch.c_str());
1637    time_t now = time(NULL);
1638    fprintf(report, "Date: %s" , ctime(&now));
1639    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1640    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1641    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1642
1643    // ensure that the log is flushed
1644    if(d->term_out)
1645       fflush(d->term_out);
1646
1647    // attach terminal log it if we have it
1648    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1649    if (!logfile_name.empty())
1650    {
1651       FILE *log = NULL;
1652
1653       fprintf(report, "DpkgTerminalLog:\n");
1654       log = fopen(logfile_name.c_str(),"r");
1655       if(log != NULL)
1656       {
1657          char buf[1024];
1658          while( fgets(buf, sizeof(buf), log) != NULL)
1659             fprintf(report, " %s", buf);
1660          fclose(log);
1661       }
1662    }
1663
1664    // log the ordering
1665    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1666    fprintf(report, "AptOrdering:\n");
1667    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1668       if ((*I).Pkg != NULL)
1669          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1670       else
1671          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1672
1673    // attach dmesg log (to learn about segfaults)
1674    if (FileExists("/bin/dmesg"))
1675    {
1676       fprintf(report, "Dmesg:\n");
1677       FILE *log = popen("/bin/dmesg","r");
1678       if(log != NULL)
1679       {
1680          char buf[1024];
1681          while( fgets(buf, sizeof(buf), log) != NULL)
1682             fprintf(report, " %s", buf);
1683          pclose(log);
1684       }
1685    }
1686
1687    // attach df -l log (to learn about filesystem status)
1688    if (FileExists("/bin/df"))
1689    {
1690
1691       fprintf(report, "Df:\n");
1692       FILE *log = popen("/bin/df -l","r");
1693       if(log != NULL)
1694       {
1695          char buf[1024];
1696          while( fgets(buf, sizeof(buf), log) != NULL)
1697             fprintf(report, " %s", buf);
1698          pclose(log);
1699       }
1700    }
1701
1702    fclose(report);
1703
1704 }
1705                                                                         /*}}}*/