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 <apt-pkg/dpkgpm.h>
  12 #include <apt-pkg/error.h>
  13 #include <apt-pkg/configuration.h>
  14 #include <apt-pkg/depcache.h>
  15 #include <apt-pkg/pkgrecords.h>
  16 #include <apt-pkg/strutl.h>
  17 #include <apt-pkg/fileutl.h>
  18 #include <apt-pkg/cachefile.h>
  19
  20 #include <unistd.h>
  21 #include <stdlib.h>
  22 #include <fcntl.h>
  23 #include <sys/select.h>
  24 #include <sys/stat.h>
  25 #include <sys/types.h>
  26 #include <sys/wait.h>
  27 #include <signal.h>
  28 #include <errno.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <algorithm>
  33 #include <sstream>
  34 #include <map>
  35
  36 #include <termios.h>
  37 #include <unistd.h>
  38 #include <sys/ioctl.h>
  39 #include <pty.h>
  40
  41 #include <config.h>
  42 #include <apti18n.h>
  43                                                                         /*}}}*/
  44
  45 using namespace std;
  46
  47 namespace
  48 {
  49   // Maps the dpkg "processing" info to human readable names.  Entry 0
  50   // of each array is the key, entry 1 is the value.
  51   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  52     std::make_pair("install",   N_("Installing %s")),
  53     std::make_pair("configure", N_("Configuring %s")),
  54     std::make_pair("remove",    N_("Removing %s")),
  55     std::make_pair("purge",    N_("Completely removing %s")),
  56     std::make_pair("disappear", N_("Noting disappearance of %s")),
  57     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  58   };
  59
  60   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  61   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  62
  63   // Predicate to test whether an entry in the PackageProcessingOps
  64   // array matches a string.
  65   class MatchProcessingOp
  66   {
  67     const char *target;
  68
  69   public:
  70     MatchProcessingOp(const char *the_target)
  71       : target(the_target)
  72     {
  73     }
  74
  75     bool operator()(const std::pair<const char *, const char *> &pair) const
  76     {
  77       return strcmp(pair.first, target) == 0;
  78     }
  79   };
  80 }
  81
  82 /* helper function to ionice the given PID
  83
  84  there is no C header for ionice yet - just the syscall interface
  85  so we use the binary from util-linux
  86 */
  87 static bool
  88 ionice(int PID)
  89 {
  90    if (!FileExists("/usr/bin/ionice"))
  91       return false;
  92    pid_t Process = ExecFork();
  93    if (Process == 0)
  94    {
  95       char buf[32];
  96       snprintf(buf, sizeof(buf), "-p%d", PID);
  97       const char *Args[4];
  98       Args[0] = "/usr/bin/ionice";
  99       Args[1] = "-c3";
 100       Args[2] = buf;
 101       Args[3] = 0;
 102       execv(Args[0], (char **)Args);
 103    }
 104    return ExecWait(Process, "ionice");
 105 }
 106
 107 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 108 // ---------------------------------------------------------------------
 109 /* */
 110 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 111    : pkgPackageManager(Cache), dpkgbuf_pos(0),
 112      term_out(NULL), history_out(NULL), PackagesDone(0), PackagesTotal(0)
 113 {
 114 }
 115                                                                         /*}}}*/
 116 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 117 // ---------------------------------------------------------------------
 118 /* */
 119 pkgDPkgPM::~pkgDPkgPM()
 120 {
 121 }
 122                                                                         /*}}}*/
 123 // DPkgPM::Install - Install a package                                  /*{{{*/
 124 // ---------------------------------------------------------------------
 125 /* Add an install operation to the sequence list */
 126 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 127 {
 128    if (File.empty() == true || Pkg.end() == true)
 129       return _error->Error("Internal Error, No file name for %s",Pkg.Name());
 130
 131    // If the filename string begins with DPkg::Chroot-Directory, return the
 132    // substr that is within the chroot so dpkg can access it.
 133    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 134    if (chrootdir != "/" && File.find(chrootdir) == 0)
 135    {
 136       size_t len = chrootdir.length();
 137       if (chrootdir.at(len - 1) == '/')
 138         len--;
 139       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 140    }
 141    else
 142       List.push_back(Item(Item::Install,Pkg,File));
 143
 144    return true;
 145 }
 146                                                                         /*}}}*/
 147 // DPkgPM::Configure - Configure a package                              /*{{{*/
 148 // ---------------------------------------------------------------------
 149 /* Add a configure operation to the sequence list */
 150 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 151 {
 152    if (Pkg.end() == true)
 153       return false;
 154
 155    List.push_back(Item(Item::Configure, Pkg));
 156
 157    // Use triggers for config calls if we configure "smart"
 158    // as otherwise Pre-Depends will not be satisfied, see #526774
 159    if (_config->FindB("DPkg::TriggersPending", false) == true)
 160       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 161
 162    return true;
 163 }
 164                                                                         /*}}}*/
 165 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 166 // ---------------------------------------------------------------------
 167 /* Add a remove operation to the sequence list */
 168 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 169 {
 170    if (Pkg.end() == true)
 171       return false;
 172
 173    if (Purge == true)
 174       List.push_back(Item(Item::Purge,Pkg));
 175    else
 176       List.push_back(Item(Item::Remove,Pkg));
 177    return true;
 178 }
 179                                                                         /*}}}*/
 180 // DPkgPM::SendV2Pkgs - Send version 2 package info                     /*{{{*/
 181 // ---------------------------------------------------------------------
 182 /* This is part of the helper script communication interface, it sends
 183    very complete information down to the other end of the pipe.*/
 184 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 185 {
 186    fprintf(F,"VERSION 2\n");
 187
 188    /* Write out all of the configuration directives by walking the
 189       configuration tree */
 190    const Configuration::Item *Top = _config->Tree(0);
 191    for (; Top != 0;)
 192    {
 193       if (Top->Value.empty() == false)
 194       {
 195          fprintf(F,"%s=%s\n",
 196                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 197                  QuoteString(Top->Value,"\n").c_str());
 198       }
 199
 200       if (Top->Child != 0)
 201       {
 202          Top = Top->Child;
 203          continue;
 204       }
 205
 206       while (Top != 0 && Top->Next == 0)
 207          Top = Top->Parent;
 208       if (Top != 0)
 209          Top = Top->Next;
 210    }
 211    fprintf(F,"\n");
 212
 213    // Write out the package actions in order.
 214    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 215    {
 216       if(I->Pkg.end() == true)
 217          continue;
 218
 219       pkgDepCache::StateCache &S = Cache[I->Pkg];
 220
 221       fprintf(F,"%s ",I->Pkg.Name());
 222       // Current version
 223       if (I->Pkg->CurrentVer == 0)
 224          fprintf(F,"- ");
 225       else
 226          fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
 227
 228       // Show the compare operator
 229       // Target version
 230       if (S.InstallVer != 0)
 231       {
 232          int Comp = 2;
 233          if (I->Pkg->CurrentVer != 0)
 234             Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
 235          if (Comp < 0)
 236             fprintf(F,"> ");
 237          if (Comp == 0)
 238             fprintf(F,"= ");
 239          if (Comp > 0)
 240             fprintf(F,"< ");
 241          fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
 242       }
 243       else
 244          fprintf(F,"> - ");
 245
 246       // Show the filename/operation
 247       if (I->Op == Item::Install)
 248       {
 249          // No errors here..
 250          if (I->File[0] != '/')
 251             fprintf(F,"**ERROR**\n");
 252          else
 253             fprintf(F,"%s\n",I->File.c_str());
 254       }
 255       if (I->Op == Item::Configure)
 256          fprintf(F,"**CONFIGURE**\n");
 257       if (I->Op == Item::Remove ||
 258           I->Op == Item::Purge)
 259          fprintf(F,"**REMOVE**\n");
 260
 261       if (ferror(F) != 0)
 262          return false;
 263    }
 264    return true;
 265 }
 266                                                                         /*}}}*/
 267 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 268 // ---------------------------------------------------------------------
 269 /* This looks for a list of scripts to run from the configuration file
 270    each one is run and is fed on standard input a list of all .deb files
 271    that are due to be installed. */
 272 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 273 {
 274    Configuration::Item const *Opts = _config->Tree(Cnf);
 275    if (Opts == 0 || Opts->Child == 0)
 276       return true;
 277    Opts = Opts->Child;
 278
 279    unsigned int Count = 1;
 280    for (; Opts != 0; Opts = Opts->Next, Count++)
 281    {
 282       if (Opts->Value.empty() == true)
 283          continue;
 284
 285       // Determine the protocol version
 286       string OptSec = Opts->Value;
 287       string::size_type Pos;
 288       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 289          Pos = OptSec.length();
 290       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 291
 292       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 293
 294       // Create the pipes
 295       int Pipes[2];
 296       if (pipe(Pipes) != 0)
 297          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 298       SetCloseExec(Pipes[0],true);
 299       SetCloseExec(Pipes[1],true);
 300
 301       // Purified Fork for running the script
 302       pid_t Process = ExecFork();
 303       if (Process == 0)
 304       {
 305          // Setup the FDs
 306          dup2(Pipes[0],STDIN_FILENO);
 307          SetCloseExec(STDOUT_FILENO,false);
 308          SetCloseExec(STDIN_FILENO,false);
 309          SetCloseExec(STDERR_FILENO,false);
 310
 311          if (_config->FindDir("DPkg::Chroot-Directory","/") != "/")
 312          {
 313             std::cerr << "Chrooting into "
 314                       << _config->FindDir("DPkg::Chroot-Directory")
 315                       << std::endl;
 316             if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0)
 317                _exit(100);
 318          }
 319
 320          const char *Args[4];
 321          Args[0] = "/bin/sh";
 322          Args[1] = "-c";
 323          Args[2] = Opts->Value.c_str();
 324          Args[3] = 0;
 325          execv(Args[0],(char **)Args);
 326          _exit(100);
 327       }
 328       close(Pipes[0]);
 329       FILE *F = fdopen(Pipes[1],"w");
 330       if (F == 0)
 331          return _error->Errno("fdopen","Faild to open new FD");
 332
 333       // Feed it the filenames.
 334       if (Version <= 1)
 335       {
 336          for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 337          {
 338             // Only deal with packages to be installed from .deb
 339             if (I->Op != Item::Install)
 340                continue;
 341
 342             // No errors here..
 343             if (I->File[0] != '/')
 344                continue;
 345
 346             /* Feed the filename of each package that is pending install
 347                into the pipe. */
 348             fprintf(F,"%s\n",I->File.c_str());
 349             if (ferror(F) != 0)
 350                break;
 351          }
 352       }
 353       else
 354          SendV2Pkgs(F);
 355
 356       fclose(F);
 357
 358       // Clean up the sub process
 359       if (ExecWait(Process,Opts->Value.c_str()) == false)
 360          return _error->Error("Failure running script %s",Opts->Value.c_str());
 361    }
 362
 363    return true;
 364 }
 365                                                                         /*}}}*/
 366 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 367 // ---------------------------------------------------------------------
 368 /*
 369 */
 370 void pkgDPkgPM::DoStdin(int master)
 371 {
 372    unsigned char input_buf[256] = {0,};
 373    ssize_t len = read(0, input_buf, sizeof(input_buf));
 374    if (len)
 375       write(master, input_buf, len);
 376    else
 377       stdin_is_dev_null = true;
 378 }
 379                                                                         /*}}}*/
 380 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 381 // ---------------------------------------------------------------------
 382 /*
 383  * read the terminal pty and write log
 384  */
 385 void pkgDPkgPM::DoTerminalPty(int master)
 386 {
 387    unsigned char term_buf[1024] = {0,0, };
 388
 389    ssize_t len=read(master, term_buf, sizeof(term_buf));
 390    if(len == -1 && errno == EIO)
 391    {
 392       // this happens when the child is about to exit, we
 393       // give it time to actually exit, otherwise we run
 394       // into a race so we sleep for half a second.
 395       struct timespec sleepfor = { 0, 500000000 };
 396       nanosleep(&sleepfor, NULL);
 397       return;
 398    }
 399    if(len <= 0)
 400       return;
 401    write(1, term_buf, len);
 402    if(term_out)
 403       fwrite(term_buf, len, sizeof(char), term_out);
 404 }
 405                                                                         /*}}}*/
 406 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 407 // ---------------------------------------------------------------------
 408 /*
 409  */
 410 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 411 {
 412    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 413    // the status we output
 414    ostringstream status;
 415
 416    if (Debug == true)
 417       std::clog << "got from dpkg '" << line << "'" << std::endl;
 418
 419
 420    /* dpkg sends strings like this:
 421       'status:   <pkg>:  <pkg  qstate>'
 422       errors look like this:
 423       '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
 424       and conffile-prompt like this
 425       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 426
 427       Newer versions of dpkg sent also:
 428       'processing: install: pkg'
 429       'processing: configure: pkg'
 430       'processing: remove: pkg'
 431       'processing: purge: pkg'
 432       'processing: disappear: pkg'
 433       'processing: trigproc: trigger'
 434
 435    */
 436    char* list[6];
 437    //        dpkg sends multiline error messages sometimes (see
 438    //        #374195 for a example. we should support this by
 439    //        either patching dpkg to not send multiline over the
 440    //        statusfd or by rewriting the code here to deal with
 441    //        it. for now we just ignore it and not crash
 442    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 443    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 444    {
 445       if (Debug == true)
 446          std::clog << "ignoring line: not enough ':'" << std::endl;
 447       return;
 448    }
 449    const char* const pkg = list[1];
 450    const char* action = _strstrip(list[2]);
 451
 452    // 'processing' from dpkg looks like
 453    // 'processing: action: pkg'
 454    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 455    {
 456       char s[200];
 457       const char* const pkg_or_trigger = _strstrip(list[2]);
 458       action = _strstrip( list[1]);
 459       const std::pair<const char *, const char *> * const iter =
 460         std::find_if(PackageProcessingOpsBegin,
 461                      PackageProcessingOpsEnd,
 462                      MatchProcessingOp(action));
 463       if(iter == PackageProcessingOpsEnd)
 464       {
 465          if (Debug == true)
 466             std::clog << "ignoring unknown action: " << action << std::endl;
 467          return;
 468       }
 469       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 470
 471       status << "pmstatus:" << pkg_or_trigger
 472              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 473              << ":" << s
 474              << endl;
 475       if(OutStatusFd > 0)
 476          write(OutStatusFd, status.str().c_str(), status.str().size());
 477       if (Debug == true)
 478          std::clog << "send: '" << status.str() << "'" << endl;
 479
 480       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 481          handleDisappearAction(pkg_or_trigger);
 482       return;
 483    }
 484
 485    if(strncmp(action,"error",strlen("error")) == 0)
 486    {
 487       // urgs, sometime has ":" in its error string so that we
 488       // end up with the error message split between list[3]
 489       // and list[4], e.g. the message:
 490       // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 491       // concat them again
 492       if( list[4] != NULL )
 493          list[3][strlen(list[3])] = ':';
 494
 495       status << "pmerror:" << list[1]
 496              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 497              << ":" << list[3]
 498              << endl;
 499       if(OutStatusFd > 0)
 500          write(OutStatusFd, status.str().c_str(), status.str().size());
 501       if (Debug == true)
 502          std::clog << "send: '" << status.str() << "'" << endl;
 503       pkgFailures++;
 504       WriteApportReport(list[1], list[3]);
 505       return;
 506    }
 507    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 508    {
 509       status << "pmconffile:" << list[1]
 510              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 511              << ":" << list[3]
 512              << endl;
 513       if(OutStatusFd > 0)
 514          write(OutStatusFd, status.str().c_str(), status.str().size());
 515       if (Debug == true)
 516          std::clog << "send: '" << status.str() << "'" << endl;
 517       return;
 518    }
 519
 520    vector<struct DpkgState> const &states = PackageOps[pkg];
 521    const char *next_action = NULL;
 522    if(PackageOpsDone[pkg] < states.size())
 523       next_action = states[PackageOpsDone[pkg]].state;
 524    // check if the package moved to the next dpkg state
 525    if(next_action && (strcmp(action, next_action) == 0))
 526    {
 527       // only read the translation if there is actually a next
 528       // action
 529       const char *translation = _(states[PackageOpsDone[pkg]].str);
 530       char s[200];
 531       snprintf(s, sizeof(s), translation, pkg);
 532
 533       // we moved from one dpkg state to a new one, report that
 534       PackageOpsDone[pkg]++;
 535       PackagesDone++;
 536       // build the status str
 537       status << "pmstatus:" << pkg
 538              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 539              << ":" << s
 540              << endl;
 541       if(OutStatusFd > 0)
 542          write(OutStatusFd, status.str().c_str(), status.str().size());
 543       if (Debug == true)
 544          std::clog << "send: '" << status.str() << "'" << endl;
 545    }
 546    if (Debug == true)
 547       std::clog << "(parsed from dpkg) pkg: " << pkg
 548                 << " action: " << action << endl;
 549 }
 550                                                                         /*}}}*/
 551 // DPkgPM::handleDisappearAction                                        /*{{{*/
 552 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 553 {
 554    // record the package name for display and stuff later
 555    disappearedPkgs.insert(pkgname);
 556
 557    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 558    if (unlikely(Pkg.end() == true))
 559       return;
 560    // the disappeared package was auto-installed - nothing to do
 561    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 562       return;
 563    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 564    if (unlikely(PkgVer.end() == true))
 565       return;
 566    /* search in the list of dependencies for (Pre)Depends,
 567       check if this dependency has a Replaces on our package
 568       and if so transfer the manual installed flag to it */
 569    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 570    {
 571       if (Dep->Type != pkgCache::Dep::Depends &&
 572           Dep->Type != pkgCache::Dep::PreDepends)
 573          continue;
 574       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 575       if (unlikely(Tar.end() == true))
 576          continue;
 577       // the package is already marked as manual
 578       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 579          continue;
 580       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 581       if (TarVer.end() == true)
 582          continue;
 583       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 584       {
 585          if (Rep->Type != pkgCache::Dep::Replaces)
 586             continue;
 587          if (Pkg != Rep.TargetPkg())
 588             continue;
 589          // okay, they are strongly connected - transfer manual-bit
 590          if (Debug == true)
 591             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 592          Cache[Tar].Flags &= ~Flag::Auto;
 593          break;
 594       }
 595    }
 596 }
 597                                                                         /*}}}*/
 598 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 599 // ---------------------------------------------------------------------
 600 /*
 601  */
 602 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 603 {
 604    char *p, *q;
 605    int len;
 606
 607    len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
 608    dpkgbuf_pos += len;
 609    if(len <= 0)
 610       return;
 611
 612    // process line by line if we have a buffer
 613    p = q = dpkgbuf;
 614    while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
 615    {
 616       *q = 0;
 617       ProcessDpkgStatusLine(OutStatusFd, p);
 618       p=q+1; // continue with next line
 619    }
 620
 621    // now move the unprocessed bits (after the final \n that is now a 0x0)
 622    // to the start and update dpkgbuf_pos
 623    p = (char*)memrchr(dpkgbuf, 0, dpkgbuf_pos);
 624    if(p == NULL)
 625       return;
 626
 627    // we are interessted in the first char *after* 0x0
 628    p++;
 629
 630    // move the unprocessed tail to the start and update pos
 631    memmove(dpkgbuf, p, p-dpkgbuf);
 632    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 633 }
 634                                                                         /*}}}*/
 635 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 636 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 637 {
 638    size_t const length = value.length();
 639    if (length == 0)
 640       return;
 641    // poor mans rstrip(", ")
 642    if (value[length-2] == ',' && value[length-1] == ' ')
 643       value.erase(length - 2, 2);
 644    fprintf(history_out, "%s: %s\n", tag.c_str(), value.c_str());
 645 }                                                                       /*}}}*/
 646 // DPkgPM::OpenLog                                                      /*{{{*/
 647 bool pkgDPkgPM::OpenLog()
 648 {
 649    string const logdir = _config->FindDir("Dir::Log");
 650    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 651       // FIXME: use a better string after freeze
 652       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 653
 654    // get current time
 655    char timestr[200];
 656    time_t const t = time(NULL);
 657    struct tm const * const tmp = localtime(&t);
 658    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 659
 660    // open terminal log
 661    string const logfile_name = flCombine(logdir,
 662                                    _config->Find("Dir::Log::Terminal"));
 663    if (!logfile_name.empty())
 664    {
 665       term_out = fopen(logfile_name.c_str(),"a");
 666       if (term_out == NULL)
 667          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 668       setvbuf(term_out, NULL, _IONBF, 0);
 669       SetCloseExec(fileno(term_out), true);
 670       chmod(logfile_name.c_str(), 0600);
 671       fprintf(term_out, "\nLog started: %s\n", timestr);
 672    }
 673
 674    // write your history
 675    string const history_name = flCombine(logdir,
 676                                    _config->Find("Dir::Log::History"));
 677    if (!history_name.empty())
 678    {
 679       history_out = fopen(history_name.c_str(),"a");
 680       if (history_out == NULL)
 681          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 682       chmod(history_name.c_str(), 0644);
 683       fprintf(history_out, "\nStart-Date: %s\n", timestr);
 684       string remove, purge, install, reinstall, upgrade, downgrade;
 685       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
 686       {
 687          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 688          string *line = NULL;
 689          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 690          if (Cache[I].NewInstall() == true)
 691             HISTORYINFO(install, CANDIDATE_AUTO)
 692          else if (Cache[I].ReInstall() == true)
 693             HISTORYINFO(reinstall, CANDIDATE)
 694          else if (Cache[I].Upgrade() == true)
 695             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 696          else if (Cache[I].Downgrade() == true)
 697             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 698          else if (Cache[I].Delete() == true)
 699             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 700          else
 701             continue;
 702          #undef HISTORYINFO
 703          line->append(I.FullName(false)).append(" (");
 704          switch (infostring) {
 705          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 706          case CANDIDATE_AUTO:
 707             line->append(Cache[I].CandVersion);
 708             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 709                line->append(", automatic");
 710             break;
 711          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 712          case CURRENT: line->append(Cache[I].CurVersion); break;
 713          }
 714          line->append("), ");
 715       }
 716       if (_config->Exists("Commandline::AsString") == true)
 717          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 718       WriteHistoryTag("Install", install);
 719       WriteHistoryTag("Reinstall", reinstall);
 720       WriteHistoryTag("Upgrade", upgrade);
 721       WriteHistoryTag("Downgrade",downgrade);
 722       WriteHistoryTag("Remove",remove);
 723       WriteHistoryTag("Purge",purge);
 724       fflush(history_out);
 725    }
 726
 727    return true;
 728 }
 729                                                                         /*}}}*/
 730 // DPkg::CloseLog                                                       /*{{{*/
 731 bool pkgDPkgPM::CloseLog()
 732 {
 733    char timestr[200];
 734    time_t t = time(NULL);
 735    struct tm *tmp = localtime(&t);
 736    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 737
 738    if(term_out)
 739    {
 740       fprintf(term_out, "Log ended: ");
 741       fprintf(term_out, "%s", timestr);
 742       fprintf(term_out, "\n");
 743       fclose(term_out);
 744    }
 745    term_out = NULL;
 746
 747    if(history_out)
 748    {
 749       if (disappearedPkgs.empty() == false)
 750       {
 751          string disappear;
 752          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 753               d != disappearedPkgs.end(); ++d)
 754          {
 755             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 756             disappear.append(*d);
 757             if (P.end() == true)
 758                disappear.append(", ");
 759             else
 760                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 761          }
 762          WriteHistoryTag("Disappeared", disappear);
 763       }
 764       if (dpkg_error.empty() == false)
 765          fprintf(history_out, "Error: %s\n", dpkg_error.c_str());
 766       fprintf(history_out, "End-Date: %s\n", timestr);
 767       fclose(history_out);
 768    }
 769    history_out = NULL;
 770
 771    return true;
 772 }
 773                                                                         /*}}}*/
 774 /*{{{*/
 775 // This implements a racy version of pselect for those architectures
 776 // that don't have a working implementation.
 777 // FIXME: Probably can be removed on Lenny+1
 778 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 779    fd_set *exceptfds, const struct timespec *timeout,
 780    const sigset_t *sigmask)
 781 {
 782    sigset_t origmask;
 783    struct timeval tv;
 784    int retval;
 785
 786    tv.tv_sec = timeout->tv_sec;
 787    tv.tv_usec = timeout->tv_nsec/1000;
 788
 789    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 790    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 791    sigprocmask(SIG_SETMASK, &origmask, 0);
 792    return retval;
 793 }
 794 /*}}}*/
 795 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 796 // ---------------------------------------------------------------------
 797 /* This globs the operations and calls dpkg
 798  *
 799  * If it is called with "OutStatusFd" set to a valid file descriptor
 800  * apt will report the install progress over this fd. It maps the
 801  * dpkg states a package goes through to human readable (and i10n-able)
 802  * names and calculates a percentage for each step.
 803 */
 804 bool pkgDPkgPM::Go(int OutStatusFd)
 805 {
 806    fd_set rfds;
 807    struct timespec tv;
 808    sigset_t sigmask;
 809    sigset_t original_sigmask;
 810
 811    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 812    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 813    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 814
 815    if (RunScripts("DPkg::Pre-Invoke") == false)
 816       return false;
 817
 818    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 819       return false;
 820
 821    // support subpressing of triggers processing for special
 822    // cases like d-i that runs the triggers handling manually
 823    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 824    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 825    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 826       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 827
 828    // map the dpkg states to the operations that are performed
 829    // (this is sorted in the same way as Item::Ops)
 830    static const struct DpkgState DpkgStatesOpMap[][7] = {
 831       // Install operation
 832       {
 833          {"half-installed", N_("Preparing %s")},
 834          {"unpacked", N_("Unpacking %s") },
 835          {NULL, NULL}
 836       },
 837       // Configure operation
 838       {
 839          {"unpacked",N_("Preparing to configure %s") },
 840          {"half-configured", N_("Configuring %s") },
 841          { "installed", N_("Installed %s")},
 842          {NULL, NULL}
 843       },
 844       // Remove operation
 845       {
 846          {"half-configured", N_("Preparing for removal of %s")},
 847          {"half-installed", N_("Removing %s")},
 848          {"config-files",  N_("Removed %s")},
 849          {NULL, NULL}
 850       },
 851       // Purge operation
 852       {
 853          {"config-files", N_("Preparing to completely remove %s")},
 854          {"not-installed", N_("Completely removed %s")},
 855          {NULL, NULL}
 856       },
 857    };
 858
 859    // init the PackageOps map, go over the list of packages that
 860    // that will be [installed|configured|removed|purged] and add
 861    // them to the PackageOps map (the dpkg states it goes through)
 862    // and the PackageOpsTranslations (human readable strings)
 863    for (vector<Item>::const_iterator I = List.begin(); I != List.end();I++)
 864    {
 865       if((*I).Pkg.end() == true)
 866          continue;
 867
 868       string const name = (*I).Pkg.Name();
 869       PackageOpsDone[name] = 0;
 870       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 871       {
 872          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 873          PackagesTotal++;
 874       }
 875    }
 876
 877    stdin_is_dev_null = false;
 878
 879    // create log
 880    OpenLog();
 881
 882    // this loop is runs once per operation
 883    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
 884    {
 885       // Do all actions with the same Op in one run
 886       vector<Item>::const_iterator J = I;
 887       if (TriggersPending == true)
 888          for (; J != List.end(); J++)
 889          {
 890             if (J->Op == I->Op)
 891                continue;
 892             if (J->Op != Item::TriggersPending)
 893                break;
 894             vector<Item>::const_iterator T = J + 1;
 895             if (T != List.end() && T->Op == I->Op)
 896                continue;
 897             break;
 898          }
 899       else
 900          for (; J != List.end() && J->Op == I->Op; J++)
 901             /* nothing */;
 902
 903       // Generate the argument list
 904       const char *Args[MaxArgs + 50];
 905       // keep track of allocated strings for multiarch package names
 906       char *Packages[MaxArgs + 50];
 907       unsigned int pkgcount = 0;
 908
 909       // Now check if we are within the MaxArgs limit
 910       //
 911       // this code below is problematic, because it may happen that
 912       // the argument list is split in a way that A depends on B
 913       // and they are in the same "--configure A B" run
 914       // - with the split they may now be configured in different
 915       //   runs
 916       if (J - I > (signed)MaxArgs)
 917          J = I + MaxArgs;
 918
 919       unsigned int n = 0;
 920       unsigned long Size = 0;
 921       string const Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 922       Args[n++] = Tmp.c_str();
 923       Size += strlen(Args[n-1]);
 924
 925       // Stick in any custom dpkg options
 926       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 927       if (Opts != 0)
 928       {
 929          Opts = Opts->Child;
 930          for (; Opts != 0; Opts = Opts->Next)
 931          {
 932             if (Opts->Value.empty() == true)
 933                continue;
 934             Args[n++] = Opts->Value.c_str();
 935             Size += Opts->Value.length();
 936          }
 937       }
 938
 939       char status_fd_buf[20];
 940       int fd[2];
 941       pipe(fd);
 942
 943       Args[n++] = "--status-fd";
 944       Size += strlen(Args[n-1]);
 945       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 946       Args[n++] = status_fd_buf;
 947       Size += strlen(Args[n-1]);
 948
 949       switch (I->Op)
 950       {
 951          case Item::Remove:
 952          Args[n++] = "--force-depends";
 953          Size += strlen(Args[n-1]);
 954          Args[n++] = "--force-remove-essential";
 955          Size += strlen(Args[n-1]);
 956          Args[n++] = "--remove";
 957          Size += strlen(Args[n-1]);
 958          break;
 959
 960          case Item::Purge:
 961          Args[n++] = "--force-depends";
 962          Size += strlen(Args[n-1]);
 963          Args[n++] = "--force-remove-essential";
 964          Size += strlen(Args[n-1]);
 965          Args[n++] = "--purge";
 966          Size += strlen(Args[n-1]);
 967          break;
 968
 969          case Item::Configure:
 970          Args[n++] = "--configure";
 971          Size += strlen(Args[n-1]);
 972          break;
 973
 974          case Item::ConfigurePending:
 975          Args[n++] = "--configure";
 976          Size += strlen(Args[n-1]);
 977          Args[n++] = "--pending";
 978          Size += strlen(Args[n-1]);
 979          break;
 980
 981          case Item::TriggersPending:
 982          Args[n++] = "--triggers-only";
 983          Size += strlen(Args[n-1]);
 984          Args[n++] = "--pending";
 985          Size += strlen(Args[n-1]);
 986          break;
 987
 988          case Item::Install:
 989          Args[n++] = "--unpack";
 990          Size += strlen(Args[n-1]);
 991          Args[n++] = "--auto-deconfigure";
 992          Size += strlen(Args[n-1]);
 993          break;
 994       }
 995
 996       if (NoTriggers == true && I->Op != Item::TriggersPending &&
 997           I->Op != Item::ConfigurePending)
 998       {
 999          Args[n++] = "--no-triggers";
1000          Size += strlen(Args[n-1]);
1001       }
1002
1003       // Write in the file or package names
1004       if (I->Op == Item::Install)
1005       {
1006          for (;I != J && Size < MaxArgBytes; I++)
1007          {
1008             if (I->File[0] != '/')
1009                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1010             Args[n++] = I->File.c_str();
1011             Size += strlen(Args[n-1]);
1012          }
1013       }
1014       else
1015       {
1016          string const nativeArch = _config->Find("APT::Architecture");
1017          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1018          for (;I != J && Size < MaxArgBytes; I++)
1019          {
1020             if((*I).Pkg.end() == true)
1021                continue;
1022             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1023                continue;
1024             if (I->Pkg.Arch() == nativeArch || !strcmp(I->Pkg.Arch(), "all"))
1025                Args[n++] = I->Pkg.Name();
1026             else
1027             {
1028                Packages[pkgcount] = strdup(I->Pkg.FullName(false).c_str());
1029                Args[n++] = Packages[pkgcount++];
1030             }
1031             Size += strlen(Args[n-1]);
1032          }
1033          // skip configure action if all sheduled packages disappeared
1034          if (oldSize == Size)
1035             continue;
1036       }
1037       Args[n] = 0;
1038       J = I;
1039
1040       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1041       {
1042          for (unsigned int k = 0; k != n; k++)
1043             clog << Args[k] << ' ';
1044          clog << endl;
1045          continue;
1046       }
1047
1048       cout << flush;
1049       clog << flush;
1050       cerr << flush;
1051
1052       /* Mask off sig int/quit. We do this because dpkg also does when
1053          it forks scripts. What happens is that when you hit ctrl-c it sends
1054          it to all processes in the group. Since dpkg ignores the signal
1055          it doesn't die but we do! So we must also ignore it */
1056       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1057       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
1058
1059       // ignore SIGHUP as well (debian #463030)
1060       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1061
1062       struct    termios tt;
1063       struct    winsize win;
1064       int       master = -1;
1065       int       slave = -1;
1066
1067       // if tcgetattr does not return zero there was a error
1068       // and we do not do any pty magic
1069       if (tcgetattr(0, &tt) == 0)
1070       {
1071          ioctl(0, TIOCGWINSZ, (char *)&win);
1072          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1073          {
1074             const char *s = _("Can not write log, openpty() "
1075                               "failed (/dev/pts not mounted?)\n");
1076             fprintf(stderr, "%s",s);
1077             if(term_out)
1078               fprintf(term_out, "%s",s);
1079             master = slave = -1;
1080          }  else {
1081             struct termios rtt;
1082             rtt = tt;
1083             cfmakeraw(&rtt);
1084             rtt.c_lflag &= ~ECHO;
1085             rtt.c_lflag |= ISIG;
1086             // block SIGTTOU during tcsetattr to prevent a hang if
1087             // the process is a member of the background process group
1088             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1089             sigemptyset(&sigmask);
1090             sigaddset(&sigmask, SIGTTOU);
1091             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1092             tcsetattr(0, TCSAFLUSH, &rtt);
1093             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1094          }
1095       }
1096
1097        // Fork dpkg
1098       pid_t Child;
1099       _config->Set("APT::Keep-Fds::",fd[1]);
1100       // send status information that we are about to fork dpkg
1101       if(OutStatusFd > 0) {
1102          ostringstream status;
1103          status << "pmstatus:dpkg-exec:"
1104                 << (PackagesDone/float(PackagesTotal)*100.0)
1105                 << ":" << _("Running dpkg")
1106                 << endl;
1107          write(OutStatusFd, status.str().c_str(), status.str().size());
1108       }
1109       Child = ExecFork();
1110
1111       // This is the child
1112       if (Child == 0)
1113       {
1114          if(slave >= 0 && master >= 0)
1115          {
1116             setsid();
1117             ioctl(slave, TIOCSCTTY, 0);
1118             close(master);
1119             dup2(slave, 0);
1120             dup2(slave, 1);
1121             dup2(slave, 2);
1122             close(slave);
1123          }
1124          close(fd[0]); // close the read end of the pipe
1125
1126          if (_config->FindDir("DPkg::Chroot-Directory","/") != "/")
1127          {
1128             std::cerr << "Chrooting into "
1129                       << _config->FindDir("DPkg::Chroot-Directory")
1130                       << std::endl;
1131             if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0)
1132                _exit(100);
1133          }
1134
1135          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1136             _exit(100);
1137
1138          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1139          {
1140             int Flags,dummy;
1141             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1142                _exit(100);
1143
1144             // Discard everything in stdin before forking dpkg
1145             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1146                _exit(100);
1147
1148             while (read(STDIN_FILENO,&dummy,1) == 1);
1149
1150             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1151                _exit(100);
1152          }
1153
1154          /* No Job Control Stop Env is a magic dpkg var that prevents it
1155             from using sigstop */
1156          putenv((char *)"DPKG_NO_TSTP=yes");
1157          execvp(Args[0],(char **)Args);
1158          cerr << "Could not exec dpkg!" << endl;
1159          _exit(100);
1160       }
1161
1162       // apply ionice
1163       if (_config->FindB("DPkg::UseIoNice", false) == true)
1164          ionice(Child);
1165
1166       // clear the Keep-Fd again
1167       _config->Clear("APT::Keep-Fds",fd[1]);
1168
1169       // Wait for dpkg
1170       int Status = 0;
1171
1172       // we read from dpkg here
1173       int const _dpkgin = fd[0];
1174       close(fd[1]);                        // close the write end of the pipe
1175
1176       if(slave > 0)
1177          close(slave);
1178
1179       // setups fds
1180       sigemptyset(&sigmask);
1181       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1182
1183       /* clean up the temporary allocation for multiarch package names in
1184          the parent, so we don't leak memory when we return. */
1185       for (unsigned int i = 0; i < pkgcount; i++)
1186          free(Packages[i]);
1187
1188       // the result of the waitpid call
1189       int res;
1190       int select_ret;
1191       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1192          if(res < 0) {
1193             // FIXME: move this to a function or something, looks ugly here
1194             // error handling, waitpid returned -1
1195             if (errno == EINTR)
1196                continue;
1197             RunScripts("DPkg::Post-Invoke");
1198
1199             // Restore sig int/quit
1200             signal(SIGQUIT,old_SIGQUIT);
1201             signal(SIGINT,old_SIGINT);
1202             signal(SIGHUP,old_SIGHUP);
1203             return _error->Errno("waitpid","Couldn't wait for subprocess");
1204          }
1205
1206          // wait for input or output here
1207          FD_ZERO(&rfds);
1208          if (master >= 0 && !stdin_is_dev_null)
1209             FD_SET(0, &rfds);
1210          FD_SET(_dpkgin, &rfds);
1211          if(master >= 0)
1212             FD_SET(master, &rfds);
1213          tv.tv_sec = 1;
1214          tv.tv_nsec = 0;
1215          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1216                               &tv, &original_sigmask);
1217          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1218             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1219                                       NULL, &tv, &original_sigmask);
1220          if (select_ret == 0)
1221             continue;
1222          else if (select_ret < 0 && errno == EINTR)
1223             continue;
1224          else if (select_ret < 0)
1225          {
1226             perror("select() returned error");
1227             continue;
1228          }
1229
1230          if(master >= 0 && FD_ISSET(master, &rfds))
1231             DoTerminalPty(master);
1232          if(master >= 0 && FD_ISSET(0, &rfds))
1233             DoStdin(master);
1234          if(FD_ISSET(_dpkgin, &rfds))
1235             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1236       }
1237       close(_dpkgin);
1238
1239       // Restore sig int/quit
1240       signal(SIGQUIT,old_SIGQUIT);
1241       signal(SIGINT,old_SIGINT);
1242       signal(SIGHUP,old_SIGHUP);
1243
1244       if(master >= 0)
1245       {
1246          tcsetattr(0, TCSAFLUSH, &tt);
1247          close(master);
1248       }
1249
1250       // Check for an error code.
1251       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1252       {
1253          // if it was set to "keep-dpkg-runing" then we won't return
1254          // here but keep the loop going and just report it as a error
1255          // for later
1256          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1257
1258          if(stopOnError)
1259             RunScripts("DPkg::Post-Invoke");
1260
1261          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1262             strprintf(dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1263          else if (WIFEXITED(Status) != 0)
1264             strprintf(dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1265          else
1266             strprintf(dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1267
1268          if(dpkg_error.size() > 0)
1269             _error->Error("%s", dpkg_error.c_str());
1270
1271          if(stopOnError)
1272          {
1273             CloseLog();
1274             return false;
1275          }
1276       }
1277    }
1278    CloseLog();
1279
1280    if (RunScripts("DPkg::Post-Invoke") == false)
1281       return false;
1282
1283    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1284    {
1285       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1286       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1287           unlink(oldpkgcache.c_str()) == 0)
1288       {
1289          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1290          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1291          {
1292             _error->PushToStack();
1293             pkgCacheFile CacheFile;
1294             CacheFile.BuildCaches(NULL, true);
1295             _error->RevertToStack();
1296          }
1297       }
1298    }
1299
1300    Cache.writeStateFile(NULL);
1301    return true;
1302 }
1303                                                                         /*}}}*/
1304 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1305 // ---------------------------------------------------------------------
1306 /* */
1307 void pkgDPkgPM::Reset()
1308 {
1309    List.erase(List.begin(),List.end());
1310 }
1311                                                                         /*}}}*/
1312 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1313 // ---------------------------------------------------------------------
1314 /* */
1315 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1316 {
1317    string pkgname, reportfile, srcpkgname, pkgver, arch;
1318    string::size_type pos;
1319    FILE *report;
1320
1321    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1322    {
1323       std::clog << "configured to not write apport reports" << std::endl;
1324       return;
1325    }
1326
1327    // only report the first errors
1328    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1329    {
1330       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1331       return;
1332    }
1333
1334    // check if its not a follow up error
1335    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1336    if(strstr(errormsg, needle) != NULL) {
1337       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1338       return;
1339    }
1340
1341    // do not report disk-full failures
1342    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1343       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1344       return;
1345    }
1346
1347    // do not report out-of-memory failures
1348    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1349       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1350       return;
1351    }
1352
1353    // do not report dpkg I/O errors
1354    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1355    if(strstr(errormsg, "short read in buffer_copy (")) {
1356       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1357       return;
1358    }
1359
1360    // get the pkgname and reportfile
1361    pkgname = flNotDir(pkgpath);
1362    pos = pkgname.find('_');
1363    if(pos != string::npos)
1364       pkgname = pkgname.substr(0, pos);
1365
1366    // find the package versin and source package name
1367    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1368    if (Pkg.end() == true)
1369       return;
1370    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1371    if (Ver.end() == true)
1372       return;
1373    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1374    pkgRecords Recs(Cache);
1375    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1376    srcpkgname = Parse.SourcePkg();
1377    if(srcpkgname.empty())
1378       srcpkgname = pkgname;
1379
1380    // if the file exists already, we check:
1381    // - if it was reported already (touched by apport).
1382    //   If not, we do nothing, otherwise
1383    //    we overwrite it. This is the same behaviour as apport
1384    // - if we have a report with the same pkgversion already
1385    //   then we skip it
1386    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1387    if(FileExists(reportfile))
1388    {
1389       struct stat buf;
1390       char strbuf[255];
1391
1392       // check atime/mtime
1393       stat(reportfile.c_str(), &buf);
1394       if(buf.st_mtime > buf.st_atime)
1395          return;
1396
1397       // check if the existing report is the same version
1398       report = fopen(reportfile.c_str(),"r");
1399       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1400       {
1401          if(strstr(strbuf,"Package:") == strbuf)
1402          {
1403             char pkgname[255], version[255];
1404             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
1405                if(strcmp(pkgver.c_str(), version) == 0)
1406                {
1407                   fclose(report);
1408                   return;
1409                }
1410          }
1411       }
1412       fclose(report);
1413    }
1414
1415    // now write the report
1416    arch = _config->Find("APT::Architecture");
1417    report = fopen(reportfile.c_str(),"w");
1418    if(report == NULL)
1419       return;
1420    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1421       chmod(reportfile.c_str(), 0);
1422    else
1423       chmod(reportfile.c_str(), 0600);
1424    fprintf(report, "ProblemType: Package\n");
1425    fprintf(report, "Architecture: %s\n", arch.c_str());
1426    time_t now = time(NULL);
1427    fprintf(report, "Date: %s" , ctime(&now));
1428    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1429    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1430    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1431
1432    // ensure that the log is flushed
1433    if(term_out)
1434       fflush(term_out);
1435
1436    // attach terminal log it if we have it
1437    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1438    if (!logfile_name.empty())
1439    {
1440       FILE *log = NULL;
1441       char buf[1024];
1442
1443       fprintf(report, "DpkgTerminalLog:\n");
1444       log = fopen(logfile_name.c_str(),"r");
1445       if(log != NULL)
1446       {
1447          while( fgets(buf, sizeof(buf), log) != NULL)
1448             fprintf(report, " %s", buf);
1449          fclose(log);
1450       }
1451    }
1452
1453    // log the ordering
1454    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1455    fprintf(report, "AptOrdering:\n");
1456    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
1457       fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1458
1459    // attach dmesg log (to learn about segfaults)
1460    if (FileExists("/bin/dmesg"))
1461    {
1462       FILE *log = NULL;
1463       char buf[1024];
1464
1465       fprintf(report, "Dmesg:\n");
1466       log = popen("/bin/dmesg","r");
1467       if(log != NULL)
1468       {
1469          while( fgets(buf, sizeof(buf), log) != NULL)
1470             fprintf(report, " %s", buf);
1471          pclose(log);
1472       }
1473    }
1474
1475    // attach df -l log (to learn about filesystem status)
1476    if (FileExists("/bin/df"))
1477    {
1478       FILE *log = NULL;
1479       char buf[1024];
1480
1481       fprintf(report, "Df:\n");
1482       log = popen("/bin/df -l","r");
1483       if(log != NULL)
1484       {
1485          while( fgets(buf, sizeof(buf), log) != NULL)
1486             fprintf(report, " %s", buf);
1487          pclose(log);
1488       }
1489    }
1490
1491    fclose(report);
1492
1493 }
1494                                                                         /*}}}*/