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