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