apt-pkg/deb/dpkgpm.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
   4 /* ######################################################################
   5
   6    DPKG Package Manager - Provide an interface to dpkg
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include <config.h>
  12
  13 #include <apt-pkg/cachefile.h>
  14 #include <apt-pkg/configuration.h>
  15 #include <apt-pkg/depcache.h>
  16 #include <apt-pkg/dpkgpm.h>
  17 #include <apt-pkg/debsystem.h>
  18 #include <apt-pkg/error.h>
  19 #include <apt-pkg/fileutl.h>
  20 #include <apt-pkg/install-progress.h>
  21 #include <apt-pkg/packagemanager.h>
  22 #include <apt-pkg/strutl.h>
  23 #include <apt-pkg/cacheiterators.h>
  24 #include <apt-pkg/macros.h>
  25 #include <apt-pkg/pkgcache.h>
  26
  27 #include <errno.h>
  28 #include <fcntl.h>
  29 #include <grp.h>
  30 #include <pwd.h>
  31 #include <signal.h>
  32 #include <stddef.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <sys/ioctl.h>
  36 #include <sys/select.h>
  37 #include <sys/stat.h>
  38 #include <sys/time.h>
  39 #include <sys/wait.h>
  40 #include <termios.h>
  41 #include <time.h>
  42 #include <unistd.h>
  43 #include <algorithm>
  44 #include <cstring>
  45 #include <iostream>
  46 #include <map>
  47 #include <set>
  48 #include <string>
  49 #include <utility>
  50 #include <vector>
  51 #include <sstream>
  52 #include <numeric>
  53
  54 #include <apti18n.h>
  55                                                                         /*}}}*/
  56
  57 using namespace std;
  58
  59 APT_PURE static string
  60 AptHistoryRequestingUser()
  61 {
  62    const char* EnvKeys[]{"SUDO_UID", "PKEXEC_UID", "PACKAGEKIT_CALLER_UID"};
  63
  64    for (const auto &Key: EnvKeys)
  65    {
  66       if (getenv(Key) != nullptr)
  67       {
  68          int uid = atoi(getenv(Key));
  69          if (uid > 0) {
  70             struct passwd pwd;
  71             struct passwd *result;
  72             char buf[255];
  73             if (getpwuid_r(uid, &pwd, buf, sizeof(buf), &result) == 0 && result != NULL) {
  74                std::string res;
  75                strprintf(res, "%s (%d)", pwd.pw_name, uid);
  76                return res;
  77             }
  78          }
  79       }
  80    }
  81    return "";
  82 }
  83
  84 APT_PURE static unsigned int
  85 EnvironmentSize()
  86 {
  87   unsigned int size = 0;
  88   char **envp = environ;
  89
  90   while (*envp != NULL)
  91     size += strlen (*envp++) + 1;
  92
  93   return size;
  94 }
  95
  96 class pkgDPkgPMPrivate
  97 {
  98 public:
  99    pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
 100                         term_out(NULL), history_out(NULL),
 101                         progress(NULL), tt_is_valid(false), master(-1),
 102                         slave(NULL), protect_slave_from_dying(-1),
 103                         direct_stdin(false)
 104    {
 105       dpkgbuf[0] = '\0';
 106    }
 107    ~pkgDPkgPMPrivate()
 108    {
 109    }
 110    bool stdin_is_dev_null;
 111    // the buffer we use for the dpkg status-fd reading
 112    char dpkgbuf[1024];
 113    size_t dpkgbuf_pos;
 114    FILE *term_out;
 115    FILE *history_out;
 116    string dpkg_error;
 117    APT::Progress::PackageManager *progress;
 118
 119    // pty stuff
 120    struct termios tt;
 121    bool tt_is_valid;
 122    int master;
 123    char * slave;
 124    int protect_slave_from_dying;
 125
 126    // signals
 127    sigset_t sigmask;
 128    sigset_t original_sigmask;
 129
 130    bool direct_stdin;
 131 };
 132
 133 namespace
 134 {
 135   // Maps the dpkg "processing" info to human readable names.  Entry 0
 136   // of each array is the key, entry 1 is the value.
 137   const std::pair<const char *, const char *> PackageProcessingOps[] = {
 138     std::make_pair("install",   N_("Installing %s")),
 139     std::make_pair("configure", N_("Configuring %s")),
 140     std::make_pair("remove",    N_("Removing %s")),
 141     std::make_pair("purge",    N_("Completely removing %s")),
 142     std::make_pair("disappear", N_("Noting disappearance of %s")),
 143     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
 144   };
 145
 146   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
 147   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
 148
 149   // Predicate to test whether an entry in the PackageProcessingOps
 150   // array matches a string.
 151   class MatchProcessingOp
 152   {
 153     const char *target;
 154
 155   public:
 156     explicit MatchProcessingOp(const char *the_target)
 157       : target(the_target)
 158     {
 159     }
 160
 161     bool operator()(const std::pair<const char *, const char *> &pair) const
 162     {
 163       return strcmp(pair.first, target) == 0;
 164     }
 165   };
 166 }
 167
 168 /* helper function to ionice the given PID
 169
 170  there is no C header for ionice yet - just the syscall interface
 171  so we use the binary from util-linux
 172 */
 173 static bool
 174 ionice(int PID)
 175 {
 176    if (!FileExists("/usr/bin/ionice"))
 177       return false;
 178    pid_t Process = ExecFork();
 179    if (Process == 0)
 180    {
 181       char buf[32];
 182       snprintf(buf, sizeof(buf), "-p%d", PID);
 183       const char *Args[4];
 184       Args[0] = "/usr/bin/ionice";
 185       Args[1] = "-c3";
 186       Args[2] = buf;
 187       Args[3] = 0;
 188       execv(Args[0], (char **)Args);
 189    }
 190    return ExecWait(Process, "ionice");
 191 }
 192
 193 // FindNowVersion - Helper to find a Version in "now" state     /*{{{*/
 194 // ---------------------------------------------------------------------
 195 /* This is helpful when a package is no longer installed but has residual
 196  * config files
 197  */
 198 static
 199 pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
 200 {
 201    pkgCache::VerIterator Ver;
 202    for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
 203       for (pkgCache::VerFileIterator Vf = Ver.FileList(); Vf.end() == false; ++Vf)
 204          for (pkgCache::PkgFileIterator F = Vf.File(); F.end() == false; ++F)
 205          {
 206             if (F.Archive() != 0 && strcmp(F.Archive(), "now") == 0)
 207                return Ver;
 208          }
 209    return Ver;
 210 }
 211                                                                         /*}}}*/
 212
 213 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 214 // ---------------------------------------------------------------------
 215 /* */
 216 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 217    : pkgPackageManager(Cache),d(new pkgDPkgPMPrivate()), pkgFailures(0), PackagesDone(0), PackagesTotal(0)
 218 {
 219 }
 220                                                                         /*}}}*/
 221 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 222 // ---------------------------------------------------------------------
 223 /* */
 224 pkgDPkgPM::~pkgDPkgPM()
 225 {
 226    delete d;
 227 }
 228                                                                         /*}}}*/
 229 // DPkgPM::Install - Install a package                                  /*{{{*/
 230 // ---------------------------------------------------------------------
 231 /* Add an install operation to the sequence list */
 232 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 233 {
 234    if (File.empty() == true || Pkg.end() == true)
 235       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 236
 237    // If the filename string begins with DPkg::Chroot-Directory, return the
 238    // substr that is within the chroot so dpkg can access it.
 239    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 240    if (chrootdir != "/" && File.find(chrootdir) == 0)
 241    {
 242       size_t len = chrootdir.length();
 243       if (chrootdir.at(len - 1) == '/')
 244         len--;
 245       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 246    }
 247    else
 248       List.push_back(Item(Item::Install,Pkg,File));
 249
 250    return true;
 251 }
 252                                                                         /*}}}*/
 253 // DPkgPM::Configure - Configure a package                              /*{{{*/
 254 // ---------------------------------------------------------------------
 255 /* Add a configure operation to the sequence list */
 256 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 257 {
 258    if (Pkg.end() == true)
 259       return false;
 260
 261    List.push_back(Item(Item::Configure, Pkg));
 262
 263    // Use triggers for config calls if we configure "smart"
 264    // as otherwise Pre-Depends will not be satisfied, see #526774
 265    if (_config->FindB("DPkg::TriggersPending", false) == true)
 266       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 267
 268    return true;
 269 }
 270                                                                         /*}}}*/
 271 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 272 // ---------------------------------------------------------------------
 273 /* Add a remove operation to the sequence list */
 274 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 275 {
 276    if (Pkg.end() == true)
 277       return false;
 278
 279    if (Purge == true)
 280       List.push_back(Item(Item::Purge,Pkg));
 281    else
 282       List.push_back(Item(Item::Remove,Pkg));
 283    return true;
 284 }
 285                                                                         /*}}}*/
 286 // DPkgPM::SendPkgInfo - Send info for install-pkgs hook                /*{{{*/
 287 // ---------------------------------------------------------------------
 288 /* This is part of the helper script communication interface, it sends
 289    very complete information down to the other end of the pipe.*/
 290 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 291 {
 292    return SendPkgsInfo(F, 2);
 293 }
 294 bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
 295 {
 296    // This version of APT supports only v3, so don't sent higher versions
 297    if (Version <= 3)
 298       fprintf(F,"VERSION %u\n", Version);
 299    else
 300       fprintf(F,"VERSION 3\n");
 301
 302    /* Write out all of the configuration directives by walking the
 303       configuration tree */
 304    const Configuration::Item *Top = _config->Tree(0);
 305    for (; Top != 0;)
 306    {
 307       if (Top->Value.empty() == false)
 308       {
 309          fprintf(F,"%s=%s\n",
 310                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 311                  QuoteString(Top->Value,"\n").c_str());
 312       }
 313
 314       if (Top->Child != 0)
 315       {
 316          Top = Top->Child;
 317          continue;
 318       }
 319
 320       while (Top != 0 && Top->Next == 0)
 321          Top = Top->Parent;
 322       if (Top != 0)
 323          Top = Top->Next;
 324    }
 325    fprintf(F,"\n");
 326
 327    // Write out the package actions in order.
 328    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 329    {
 330       if(I->Pkg.end() == true)
 331          continue;
 332
 333       pkgDepCache::StateCache &S = Cache[I->Pkg];
 334
 335       fprintf(F,"%s ",I->Pkg.Name());
 336
 337       // Current version which we are going to replace
 338       pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
 339       if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
 340          CurVer = FindNowVersion(I->Pkg);
 341
 342       if (CurVer.end() == true)
 343       {
 344          if (Version <= 2)
 345             fprintf(F, "- ");
 346          else
 347             fprintf(F, "- - none ");
 348       }
 349       else
 350       {
 351          fprintf(F, "%s ", CurVer.VerStr());
 352          if (Version >= 3)
 353             fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
 354       }
 355
 356       // Show the compare operator between current and install version
 357       if (S.InstallVer != 0)
 358       {
 359          pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
 360          int Comp = 2;
 361          if (CurVer.end() == false)
 362             Comp = InstVer.CompareVer(CurVer);
 363          if (Comp < 0)
 364             fprintf(F,"> ");
 365          else if (Comp == 0)
 366             fprintf(F,"= ");
 367          else if (Comp > 0)
 368             fprintf(F,"< ");
 369          fprintf(F, "%s ", InstVer.VerStr());
 370          if (Version >= 3)
 371             fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
 372       }
 373       else
 374       {
 375          if (Version <= 2)
 376             fprintf(F, "> - ");
 377          else
 378             fprintf(F, "> - - none ");
 379       }
 380
 381       // Show the filename/operation
 382       if (I->Op == Item::Install)
 383       {
 384          // No errors here..
 385          if (I->File[0] != '/')
 386             fprintf(F,"**ERROR**\n");
 387          else
 388             fprintf(F,"%s\n",I->File.c_str());
 389       }
 390       else if (I->Op == Item::Configure)
 391          fprintf(F,"**CONFIGURE**\n");
 392       else if (I->Op == Item::Remove ||
 393           I->Op == Item::Purge)
 394          fprintf(F,"**REMOVE**\n");
 395
 396       if (ferror(F) != 0)
 397          return false;
 398    }
 399    return true;
 400 }
 401                                                                         /*}}}*/
 402 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 403 // ---------------------------------------------------------------------
 404 /* This looks for a list of scripts to run from the configuration file
 405    each one is run and is fed on standard input a list of all .deb files
 406    that are due to be installed. */
 407 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 408 {
 409    bool result = true;
 410
 411    Configuration::Item const *Opts = _config->Tree(Cnf);
 412    if (Opts == 0 || Opts->Child == 0)
 413       return true;
 414    Opts = Opts->Child;
 415
 416    sighandler_t old_sigpipe = signal(SIGPIPE, SIG_IGN);
 417
 418    unsigned int Count = 1;
 419    for (; Opts != 0; Opts = Opts->Next, Count++)
 420    {
 421       if (Opts->Value.empty() == true)
 422          continue;
 423
 424       if(_config->FindB("Debug::RunScripts", false) == true)
 425          std::clog << "Running external script with list of all .deb file: '"
 426                    << Opts->Value << "'" << std::endl;
 427
 428       // Determine the protocol version
 429       string OptSec = Opts->Value;
 430       string::size_type Pos;
 431       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 432          Pos = OptSec.length();
 433       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 434
 435       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 436       unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
 437
 438       // Create the pipes
 439       std::set<int> KeepFDs;
 440       MergeKeepFdsFromConfiguration(KeepFDs);
 441       int Pipes[2];
 442       if (pipe(Pipes) != 0) {
 443          result = _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 444          break;
 445       }
 446       if (InfoFD != (unsigned)Pipes[0])
 447          SetCloseExec(Pipes[0],true);
 448       else
 449          KeepFDs.insert(Pipes[0]);
 450
 451
 452       SetCloseExec(Pipes[1],true);
 453
 454       // Purified Fork for running the script
 455       pid_t Process = ExecFork(KeepFDs);
 456       if (Process == 0)
 457       {
 458          // Setup the FDs
 459          dup2(Pipes[0], InfoFD);
 460          SetCloseExec(STDOUT_FILENO,false);
 461          SetCloseExec(STDIN_FILENO,false);
 462          SetCloseExec(STDERR_FILENO,false);
 463
 464          string hookfd;
 465          strprintf(hookfd, "%d", InfoFD);
 466          setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
 467
 468          debSystem::DpkgChrootDirectory();
 469          const char *Args[4];
 470          Args[0] = "/bin/sh";
 471          Args[1] = "-c";
 472          Args[2] = Opts->Value.c_str();
 473          Args[3] = 0;
 474          execv(Args[0],(char **)Args);
 475          _exit(100);
 476       }
 477       close(Pipes[0]);
 478       FILE *F = fdopen(Pipes[1],"w");
 479       if (F == 0) {
 480          result = _error->Errno("fdopen","Faild to open new FD");
 481          break;
 482       }
 483
 484       // Feed it the filenames.
 485       if (Version <= 1)
 486       {
 487          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 488          {
 489             // Only deal with packages to be installed from .deb
 490             if (I->Op != Item::Install)
 491                continue;
 492
 493             // No errors here..
 494             if (I->File[0] != '/')
 495                continue;
 496
 497             /* Feed the filename of each package that is pending install
 498                into the pipe. */
 499             fprintf(F,"%s\n",I->File.c_str());
 500             if (ferror(F) != 0)
 501                break;
 502          }
 503       }
 504       else
 505          SendPkgsInfo(F, Version);
 506
 507       fclose(F);
 508
 509       // Clean up the sub process
 510       if (ExecWait(Process,Opts->Value.c_str()) == false) {
 511          result = _error->Error("Failure running script %s",Opts->Value.c_str());
 512          break;
 513       }
 514    }
 515    signal(SIGPIPE, old_sigpipe);
 516
 517    return result;
 518 }
 519                                                                         /*}}}*/
 520 // DPkgPM::DoStdin - Read stdin and pass to master pty                  /*{{{*/
 521 // ---------------------------------------------------------------------
 522 /*
 523 */
 524 void pkgDPkgPM::DoStdin(int master)
 525 {
 526    unsigned char input_buf[256] = {0,};
 527    ssize_t len = read(STDIN_FILENO, input_buf, sizeof(input_buf));
 528    if (len)
 529       FileFd::Write(master, input_buf, len);
 530    else
 531       d->stdin_is_dev_null = true;
 532 }
 533                                                                         /*}}}*/
 534 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 535 // ---------------------------------------------------------------------
 536 /*
 537  * read the terminal pty and write log
 538  */
 539 void pkgDPkgPM::DoTerminalPty(int master)
 540 {
 541    unsigned char term_buf[1024] = {0,0, };
 542
 543    ssize_t len=read(master, term_buf, sizeof(term_buf));
 544    if(len == -1 && errno == EIO)
 545    {
 546       // this happens when the child is about to exit, we
 547       // give it time to actually exit, otherwise we run
 548       // into a race so we sleep for half a second.
 549       struct timespec sleepfor = { 0, 500000000 };
 550       nanosleep(&sleepfor, NULL);
 551       return;
 552    }
 553    if(len <= 0)
 554       return;
 555    FileFd::Write(1, term_buf, len);
 556    if(d->term_out)
 557       fwrite(term_buf, len, sizeof(char), d->term_out);
 558 }
 559                                                                         /*}}}*/
 560 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 561 // ---------------------------------------------------------------------
 562 /*
 563  */
 564 void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
 565 {
 566    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 567    if (Debug == true)
 568       std::clog << "got from dpkg '" << line << "'" << std::endl;
 569
 570    /* dpkg sends strings like this:
 571       'status:   <pkg>: <pkg  qstate>'
 572       'status:   <pkg>:<arch>: <pkg  qstate>'
 573
 574       'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: pkg'
 575       'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: trigger'
 576    */
 577
 578    // we need to split on ": " (note the appended space) as the ':' is
 579    // part of the pkgname:arch information that dpkg sends
 580    //
 581    // A dpkg error message may contain additional ":" (like
 582    //  "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 583    // so we need to ensure to not split too much
 584    std::vector<std::string> list = StringSplit(line, ": ", 4);
 585    if(list.size() < 3)
 586    {
 587       if (Debug == true)
 588          std::clog << "ignoring line: not enough ':'" << std::endl;
 589       return;
 590    }
 591
 592    // build the (prefix, pkgname, action) tuple, position of this
 593    // is different for "processing" or "status" messages
 594    std::string prefix = APT::String::Strip(list[0]);
 595    std::string pkgname;
 596    std::string action;
 597
 598    // "processing" has the form "processing: action: pkg or trigger"
 599    // with action = ["install", "upgrade", "configure", "remove", "purge",
 600    //                "disappear", "trigproc"]
 601    if (prefix == "processing")
 602    {
 603       pkgname = APT::String::Strip(list[2]);
 604       action = APT::String::Strip(list[1]);
 605       // we don't care for the difference (as dpkg doesn't really either)
 606       if (action == "upgrade")
 607          action = "install";
 608    }
 609    // "status" has the form: "status: pkg: state"
 610    // with state in ["half-installed", "unpacked", "half-configured",
 611    //                "installed", "config-files", "not-installed"]
 612    else if (prefix == "status")
 613    {
 614       pkgname = APT::String::Strip(list[1]);
 615       action = APT::String::Strip(list[2]);
 616    } else {
 617       if (Debug == true)
 618          std::clog << "unknown prefix '" << prefix << "'" << std::endl;
 619       return;
 620    }
 621
 622
 623    /* handle the special cases first:
 624
 625       errors look like this:
 626       '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
 627       and conffile-prompt like this
 628       'status:/etc/compiz.conf/compiz.conf :  conffile-prompt: 'current-conffile' 'new-conffile' useredited distedited
 629    */
 630    if (prefix == "status")
 631    {
 632       if(action == "error")
 633       {
 634          d->progress->Error(pkgname, PackagesDone, PackagesTotal,
 635                             list[3]);
 636          pkgFailures++;
 637          WriteApportReport(pkgname.c_str(), list[3].c_str());
 638          return;
 639       }
 640       else if(action == "conffile-prompt")
 641       {
 642          d->progress->ConffilePrompt(pkgname, PackagesDone, PackagesTotal,
 643                                      list[3]);
 644          return;
 645       }
 646    }
 647
 648    // at this point we know that we should have a valid pkgname, so build all
 649    // the info from it
 650
 651    // dpkg does not always send "pkgname:arch" so we add it here if needed
 652    if (pkgname.find(":") == std::string::npos)
 653    {
 654       // find the package in the group that is touched by dpkg
 655       // if there are multiple pkgs dpkg would send us a full pkgname:arch
 656       pkgCache::GrpIterator Grp = Cache.FindGrp(pkgname);
 657       if (Grp.end() == false)
 658       {
 659          pkgCache::PkgIterator P = Grp.PackageList();
 660          for (; P.end() != true; P = Grp.NextPkg(P))
 661          {
 662             if(Cache[P].Keep() == false || Cache[P].ReInstall() == true)
 663             {
 664                pkgname = P.FullName();
 665                break;
 666             }
 667          }
 668       }
 669    }
 670
 671    const char* const pkg = pkgname.c_str();
 672    std::string short_pkgname = StringSplit(pkgname, ":")[0];
 673    std::string arch = "";
 674    if (pkgname.find(":") != string::npos)
 675       arch = StringSplit(pkgname, ":")[1];
 676    std::string i18n_pkgname = pkgname;
 677    if (arch.size() != 0)
 678       strprintf(i18n_pkgname, "%s (%s)", short_pkgname.c_str(), arch.c_str());
 679
 680    // 'processing' from dpkg looks like
 681    // 'processing: action: pkg'
 682    if(prefix == "processing")
 683    {
 684       const std::pair<const char *, const char *> * const iter =
 685         std::find_if(PackageProcessingOpsBegin,
 686                      PackageProcessingOpsEnd,
 687                      MatchProcessingOp(action.c_str()));
 688       if(iter == PackageProcessingOpsEnd)
 689       {
 690          if (Debug == true)
 691             std::clog << "ignoring unknown action: " << action << std::endl;
 692          return;
 693       }
 694       std::string msg;
 695       strprintf(msg, _(iter->second), i18n_pkgname.c_str());
 696       d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 697
 698       // FIXME: this needs a muliarch testcase
 699       // FIXME2: is "pkgname" here reliable with dpkg only sending us
 700       //         short pkgnames?
 701       if (action == "disappear")
 702          handleDisappearAction(pkgname);
 703       return;
 704    }
 705
 706    if (prefix == "status")
 707    {
 708       vector<struct DpkgState> const &states = PackageOps[pkg];
 709       if(PackageOpsDone[pkg] < states.size())
 710       {
 711          char const * const next_action = states[PackageOpsDone[pkg]].state;
 712          if (next_action && Debug == true)
 713             std::clog << "(parsed from dpkg) pkg: " << short_pkgname
 714                << " action: " << action << " (expected: '" << next_action << "' "
 715                << PackageOpsDone[pkg] << " of " << states.size() << ")" << endl;
 716
 717          // check if the package moved to the next dpkg state
 718          if(next_action && (action == next_action))
 719          {
 720             // only read the translation if there is actually a next action
 721             char const * const translation = _(states[PackageOpsDone[pkg]].str);
 722
 723             // we moved from one dpkg state to a new one, report that
 724             ++PackageOpsDone[pkg];
 725             ++PackagesDone;
 726
 727             std::string msg;
 728             strprintf(msg, translation, i18n_pkgname.c_str());
 729             d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
 730          }
 731       }
 732    }
 733 }
 734                                                                         /*}}}*/
 735 // DPkgPM::handleDisappearAction                                        /*{{{*/
 736 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 737 {
 738    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 739    if (unlikely(Pkg.end() == true))
 740       return;
 741
 742    // record the package name for display and stuff later
 743    disappearedPkgs.insert(Pkg.FullName(true));
 744
 745    // the disappeared package was auto-installed - nothing to do
 746    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 747       return;
 748    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 749    if (unlikely(PkgVer.end() == true))
 750       return;
 751    /* search in the list of dependencies for (Pre)Depends,
 752       check if this dependency has a Replaces on our package
 753       and if so transfer the manual installed flag to it */
 754    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 755    {
 756       if (Dep->Type != pkgCache::Dep::Depends &&
 757           Dep->Type != pkgCache::Dep::PreDepends)
 758          continue;
 759       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 760       if (unlikely(Tar.end() == true))
 761          continue;
 762       // the package is already marked as manual
 763       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 764          continue;
 765       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 766       if (TarVer.end() == true)
 767          continue;
 768       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 769       {
 770          if (Rep->Type != pkgCache::Dep::Replaces)
 771             continue;
 772          if (Pkg != Rep.TargetPkg())
 773             continue;
 774          // okay, they are strongly connected - transfer manual-bit
 775          if (Debug == true)
 776             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 777          Cache[Tar].Flags &= ~Flag::Auto;
 778          break;
 779       }
 780    }
 781 }
 782                                                                         /*}}}*/
 783 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 784 void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
 785 {
 786    ssize_t const len = read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos],
 787          (sizeof(d->dpkgbuf)/sizeof(d->dpkgbuf[0])) - d->dpkgbuf_pos);
 788    if(len <= 0)
 789       return;
 790    d->dpkgbuf_pos += (len / sizeof(d->dpkgbuf[0]));
 791
 792    // process line by line from the buffer
 793    char *p = d->dpkgbuf, *q = nullptr;
 794    while((q=(char*)memchr(p, '\n', (d->dpkgbuf + d->dpkgbuf_pos) - p)) != nullptr)
 795    {
 796       *q = '\0';
 797       ProcessDpkgStatusLine(p);
 798       p = q + 1; // continue with next line
 799    }
 800
 801    // check if we stripped the buffer clean
 802    if (p > (d->dpkgbuf + d->dpkgbuf_pos))
 803    {
 804       d->dpkgbuf_pos = 0;
 805       return;
 806    }
 807
 808    // otherwise move the unprocessed tail to the start and update pos
 809    memmove(d->dpkgbuf, p, (p - d->dpkgbuf));
 810    d->dpkgbuf_pos = (d->dpkgbuf + d->dpkgbuf_pos) - p;
 811 }
 812                                                                         /*}}}*/
 813 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 814 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 815 {
 816    size_t const length = value.length();
 817    if (length == 0)
 818       return;
 819    // poor mans rstrip(", ")
 820    if (value[length-2] == ',' && value[length-1] == ' ')
 821       value.erase(length - 2, 2);
 822    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 823 }                                                                       /*}}}*/
 824 // DPkgPM::OpenLog                                                      /*{{{*/
 825 bool pkgDPkgPM::OpenLog()
 826 {
 827    string const logdir = _config->FindDir("Dir::Log");
 828    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 829       // FIXME: use a better string after freeze
 830       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 831
 832    // get current time
 833    char timestr[200];
 834    time_t const t = time(NULL);
 835    struct tm tm_buf;
 836    struct tm const * const tmp = localtime_r(&t, &tm_buf);
 837    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 838
 839    // open terminal log
 840    string const logfile_name = flCombine(logdir,
 841                                    _config->Find("Dir::Log::Terminal"));
 842    if (!logfile_name.empty())
 843    {
 844       d->term_out = fopen(logfile_name.c_str(),"a");
 845       if (d->term_out == NULL)
 846          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 847       setvbuf(d->term_out, NULL, _IONBF, 0);
 848       SetCloseExec(fileno(d->term_out), true);
 849       if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
 850       {
 851          struct passwd *pw = getpwnam("root");
 852          struct group *gr = getgrnam("adm");
 853          if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
 854             _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
 855       }
 856       if (chmod(logfile_name.c_str(), 0640) != 0)
 857          _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
 858       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 859    }
 860
 861    // write your history
 862    string const history_name = flCombine(logdir,
 863                                    _config->Find("Dir::Log::History"));
 864    if (!history_name.empty())
 865    {
 866       d->history_out = fopen(history_name.c_str(),"a");
 867       if (d->history_out == NULL)
 868          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 869       SetCloseExec(fileno(d->history_out), true);
 870       chmod(history_name.c_str(), 0644);
 871       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 872       string remove, purge, install, reinstall, upgrade, downgrade;
 873       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 874       {
 875          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 876          string *line = NULL;
 877          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 878          if (Cache[I].NewInstall() == true)
 879             HISTORYINFO(install, CANDIDATE_AUTO)
 880          else if (Cache[I].ReInstall() == true)
 881             HISTORYINFO(reinstall, CANDIDATE)
 882          else if (Cache[I].Upgrade() == true)
 883             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 884          else if (Cache[I].Downgrade() == true)
 885             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 886          else if (Cache[I].Delete() == true)
 887             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 888          else
 889             continue;
 890          #undef HISTORYINFO
 891          line->append(I.FullName(false)).append(" (");
 892          switch (infostring) {
 893          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 894          case CANDIDATE_AUTO:
 895             line->append(Cache[I].CandVersion);
 896             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 897                line->append(", automatic");
 898             break;
 899          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 900          case CURRENT: line->append(Cache[I].CurVersion); break;
 901          }
 902          line->append("), ");
 903       }
 904       if (_config->Exists("Commandline::AsString") == true)
 905          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 906       std::string RequestingUser = AptHistoryRequestingUser();
 907       if (RequestingUser != "")
 908          WriteHistoryTag("Requested-By", RequestingUser);
 909       WriteHistoryTag("Install", install);
 910       WriteHistoryTag("Reinstall", reinstall);
 911       WriteHistoryTag("Upgrade", upgrade);
 912       WriteHistoryTag("Downgrade",downgrade);
 913       WriteHistoryTag("Remove",remove);
 914       WriteHistoryTag("Purge",purge);
 915       fflush(d->history_out);
 916    }
 917
 918    return true;
 919 }
 920                                                                         /*}}}*/
 921 // DPkg::CloseLog                                                       /*{{{*/
 922 bool pkgDPkgPM::CloseLog()
 923 {
 924    char timestr[200];
 925    time_t t = time(NULL);
 926    struct tm tm_buf;
 927    struct tm *tmp = localtime_r(&t, &tm_buf);
 928    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 929
 930    if(d->term_out)
 931    {
 932       fprintf(d->term_out, "Log ended: ");
 933       fprintf(d->term_out, "%s", timestr);
 934       fprintf(d->term_out, "\n");
 935       fclose(d->term_out);
 936    }
 937    d->term_out = NULL;
 938
 939    if(d->history_out)
 940    {
 941       if (disappearedPkgs.empty() == false)
 942       {
 943          string disappear;
 944          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 945               d != disappearedPkgs.end(); ++d)
 946          {
 947             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 948             disappear.append(*d);
 949             if (P.end() == true)
 950                disappear.append(", ");
 951             else
 952                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 953          }
 954          WriteHistoryTag("Disappeared", disappear);
 955       }
 956       if (d->dpkg_error.empty() == false)
 957          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 958       fprintf(d->history_out, "End-Date: %s\n", timestr);
 959       fclose(d->history_out);
 960    }
 961    d->history_out = NULL;
 962
 963    return true;
 964 }
 965                                                                         /*}}}*/
 966                                                                         /*}}}*/
 967 /*{{{*/
 968 // This implements a racy version of pselect for those architectures
 969 // that don't have a working implementation.
 970 // FIXME: Probably can be removed on Lenny+1
 971 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 972    fd_set *exceptfds, const struct timespec *timeout,
 973    const sigset_t *sigmask)
 974 {
 975    sigset_t origmask;
 976    struct timeval tv;
 977    int retval;
 978
 979    tv.tv_sec = timeout->tv_sec;
 980    tv.tv_usec = timeout->tv_nsec/1000;
 981
 982    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 983    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 984    sigprocmask(SIG_SETMASK, &origmask, 0);
 985    return retval;
 986 }
 987                                                                         /*}}}*/
 988
 989 // DPkgPM::BuildPackagesProgressMap                                     /*{{{*/
 990 void pkgDPkgPM::BuildPackagesProgressMap()
 991 {
 992    // map the dpkg states to the operations that are performed
 993    // (this is sorted in the same way as Item::Ops)
 994    static const struct DpkgState DpkgStatesOpMap[][7] = {
 995       // Install operation
 996       {
 997          {"half-installed", N_("Preparing %s")},
 998          {"unpacked", N_("Unpacking %s") },
 999          {NULL, NULL}
1000       },
1001       // Configure operation
1002       {
1003          {"unpacked",N_("Preparing to configure %s") },
1004          {"half-configured", N_("Configuring %s") },
1005          { "installed", N_("Installed %s")},
1006          {NULL, NULL}
1007       },
1008       // Remove operation
1009       {
1010          {"half-configured", N_("Preparing for removal of %s")},
1011          {"half-installed", N_("Removing %s")},
1012          {"config-files",  N_("Removed %s")},
1013          {NULL, NULL}
1014       },
1015       // Purge operation
1016       {
1017          {"config-files", N_("Preparing to completely remove %s")},
1018          {"not-installed", N_("Completely removed %s")},
1019          {NULL, NULL}
1020       },
1021    };
1022
1023    // init the PackageOps map, go over the list of packages that
1024    // that will be [installed|configured|removed|purged] and add
1025    // them to the PackageOps map (the dpkg states it goes through)
1026    // and the PackageOpsTranslations (human readable strings)
1027    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
1028    {
1029       if((*I).Pkg.end() == true)
1030          continue;
1031
1032       string const name = (*I).Pkg.FullName();
1033       PackageOpsDone[name] = 0;
1034       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
1035       {
1036          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
1037          PackagesTotal++;
1038       }
1039    }
1040    /* one extra: We don't want the progress bar to reach 100%, especially not
1041       if we call dpkg --configure --pending and process a bunch of triggers
1042       while showing 100%. Also, spindown takes a while, so never reaching 100%
1043       is way more correct than reaching 100% while still doing stuff even if
1044       doing it this way is slightly bending the rules */
1045    ++PackagesTotal;
1046 }
1047                                                                         /*}}}*/
1048 bool pkgDPkgPM::Go(int StatusFd)
1049 {
1050    APT::Progress::PackageManager *progress = NULL;
1051    if (StatusFd == -1)
1052       progress = APT::Progress::PackageManagerProgressFactory();
1053    else
1054       progress = new APT::Progress::PackageManagerProgressFd(StatusFd);
1055
1056    return Go(progress);
1057 }
1058
1059 void pkgDPkgPM::StartPtyMagic()
1060 {
1061    if (_config->FindB("Dpkg::Use-Pty", true) == false)
1062    {
1063       d->master = -1;
1064       if (d->slave != NULL)
1065          free(d->slave);
1066       d->slave = NULL;
1067       return;
1068    }
1069
1070    if (isatty(STDIN_FILENO) == 0)
1071       d->direct_stdin = true;
1072
1073    _error->PushToStack();
1074
1075    d->master = posix_openpt(O_RDWR | O_NOCTTY);
1076    if (d->master == -1)
1077       _error->Errno("posix_openpt", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1078    else if (unlockpt(d->master) == -1)
1079       _error->Errno("unlockpt", "Unlocking the slave of master fd %d failed!", d->master);
1080    else
1081    {
1082 #ifdef HAVE_PTS_NAME_R
1083       char slave_name[64];      // 64 is used by bionic
1084       if (ptsname_r(d->master, slave_name, sizeof(slave_name)) != 0)
1085 #else
1086       char const * const slave_name = ptsname(d->master);
1087       if (slave_name == NULL)
1088 #endif
1089          _error->Errno("ptsname", "Getting name for slave of master fd %d failed!", d->master);
1090       else
1091       {
1092          d->slave = strdup(slave_name);
1093          if (d->slave == NULL)
1094             _error->Errno("strdup", "Copying name %s for slave of master fd %d failed!", slave_name, d->master);
1095          else if (grantpt(d->master) == -1)
1096             _error->Errno("grantpt", "Granting access to slave %s based on master fd %d failed!", slave_name, d->master);
1097          else if (tcgetattr(STDIN_FILENO, &d->tt) == 0)
1098          {
1099             d->tt_is_valid = true;
1100             struct termios raw_tt;
1101             // copy window size of stdout if its a 'good' terminal
1102             if (tcgetattr(STDOUT_FILENO, &raw_tt) == 0)
1103             {
1104                struct winsize win;
1105                if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) < 0)
1106                   _error->Errno("ioctl", "Getting TIOCGWINSZ from stdout failed!");
1107                if (ioctl(d->master, TIOCSWINSZ, &win) < 0)
1108                   _error->Errno("ioctl", "Setting TIOCSWINSZ for master fd %d failed!", d->master);
1109             }
1110             if (tcsetattr(d->master, TCSANOW, &d->tt) == -1)
1111                _error->Errno("tcsetattr", "Setting in Start via TCSANOW for master fd %d failed!", d->master);
1112
1113             raw_tt = d->tt;
1114             cfmakeraw(&raw_tt);
1115             raw_tt.c_lflag &= ~ECHO;
1116             raw_tt.c_lflag |= ISIG;
1117             // block SIGTTOU during tcsetattr to prevent a hang if
1118             // the process is a member of the background process group
1119             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1120             sigemptyset(&d->sigmask);
1121             sigaddset(&d->sigmask, SIGTTOU);
1122             sigprocmask(SIG_BLOCK,&d->sigmask, &d->original_sigmask);
1123             if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw_tt) == -1)
1124                _error->Errno("tcsetattr", "Setting in Start via TCSAFLUSH for stdin failed!");
1125             sigprocmask(SIG_SETMASK, &d->original_sigmask, NULL);
1126
1127          }
1128          if (d->slave != NULL)
1129          {
1130             /* on linux, closing (and later reopening) all references to the slave
1131                makes the slave a death end, so we open it here to have one open all
1132                the time. We could use this fd in SetupSlavePtyMagic() for linux, but
1133                on kfreebsd we get an incorrect ("step like") output then while it has
1134                no problem with closing all references… so to avoid platform specific
1135                code here we combine both and be happy once more */
1136             d->protect_slave_from_dying = open(d->slave, O_RDWR | O_CLOEXEC | O_NOCTTY);
1137          }
1138       }
1139    }
1140
1141    if (_error->PendingError() == true)
1142    {
1143       if (d->master != -1)
1144       {
1145          close(d->master);
1146          d->master = -1;
1147       }
1148       if (d->slave != NULL)
1149       {
1150          free(d->slave);
1151          d->slave = NULL;
1152       }
1153       _error->DumpErrors(std::cerr, GlobalError::DEBUG, false);
1154    }
1155    _error->RevertToStack();
1156 }
1157 void pkgDPkgPM::SetupSlavePtyMagic()
1158 {
1159    if(d->master == -1 || d->slave == NULL)
1160       return;
1161
1162    if (close(d->master) == -1)
1163       _error->FatalE("close", "Closing master %d in child failed!", d->master);
1164    d->master = -1;
1165    if (setsid() == -1)
1166       _error->FatalE("setsid", "Starting a new session for child failed!");
1167
1168    int const slaveFd = open(d->slave, O_RDWR | O_NOCTTY);
1169    if (slaveFd == -1)
1170       _error->FatalE("open", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
1171    else if (ioctl(slaveFd, TIOCSCTTY, 0) < 0)
1172       _error->FatalE("ioctl", "Setting TIOCSCTTY for slave fd %d failed!", slaveFd);
1173    else
1174    {
1175       unsigned short i = 0;
1176       if (d->direct_stdin == true)
1177          ++i;
1178       for (; i < 3; ++i)
1179          if (dup2(slaveFd, i) == -1)
1180             _error->FatalE("dup2", "Dupping %d to %d in child failed!", slaveFd, i);
1181
1182       if (d->tt_is_valid == true && tcsetattr(STDIN_FILENO, TCSANOW, &d->tt) < 0)
1183          _error->FatalE("tcsetattr", "Setting in Setup via TCSANOW for slave fd %d failed!", slaveFd);
1184    }
1185
1186    if (slaveFd != -1)
1187       close(slaveFd);
1188 }
1189 void pkgDPkgPM::StopPtyMagic()
1190 {
1191    if (d->slave != NULL)
1192       free(d->slave);
1193    d->slave = NULL;
1194    if (d->protect_slave_from_dying != -1)
1195    {
1196       close(d->protect_slave_from_dying);
1197       d->protect_slave_from_dying = -1;
1198    }
1199    if(d->master >= 0)
1200    {
1201       if (d->tt_is_valid == true && tcsetattr(STDIN_FILENO, TCSAFLUSH, &d->tt) == -1)
1202          _error->FatalE("tcsetattr", "Setting in Stop via TCSAFLUSH for stdin failed!");
1203       close(d->master);
1204       d->master = -1;
1205    }
1206 }
1207
1208 // DPkgPM::Go - Run the sequence                                        /*{{{*/
1209 // ---------------------------------------------------------------------
1210 /* This globs the operations and calls dpkg
1211  *
1212  * If it is called with a progress object apt will report the install
1213  * progress to this object. It maps the dpkg states a package goes
1214  * through to human readable (and i10n-able)
1215  * names and calculates a percentage for each step.
1216  */
1217 bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
1218 {
1219    pkgPackageManager::SigINTStop = false;
1220    d->progress = progress;
1221
1222    // Generate the base argument list for dpkg
1223    std::vector<std::string> const sArgs = debSystem::GetDpkgBaseCommand();
1224    std::vector<const char *> Args(sArgs.size(), NULL);
1225    std::transform(sArgs.begin(), sArgs.end(), Args.begin(),
1226          [](std::string const &s) { return s.c_str(); });
1227    unsigned long long const StartSize = std::accumulate(sArgs.begin(), sArgs.end(), 0llu,
1228          [](unsigned long long const i, std::string const &s) { return i + s.length(); });
1229    size_t const BaseArgs = Args.size();
1230
1231    fd_set rfds;
1232    struct timespec tv;
1233
1234    // FIXME: do we really need this limit when we have MaxArgBytes?
1235    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",32*1024);
1236
1237    // try to figure out the max environment size
1238    int OSArgMax = sysconf(_SC_ARG_MAX);
1239    if(OSArgMax < 0)
1240       OSArgMax = 32*1024;
1241    OSArgMax -= EnvironmentSize() - 2*1024;
1242    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes", OSArgMax);
1243    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
1244
1245    if (RunScripts("DPkg::Pre-Invoke") == false)
1246       return false;
1247
1248    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
1249       return false;
1250
1251    // support subpressing of triggers processing for special
1252    // cases like d-i that runs the triggers handling manually
1253    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
1254    if (_config->FindB("DPkg::ConfigurePending", true) == true)
1255       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
1256
1257    // for the progress
1258    BuildPackagesProgressMap();
1259
1260    d->stdin_is_dev_null = false;
1261
1262    // create log
1263    OpenLog();
1264
1265    bool dpkgMultiArch = debSystem::SupportsMultiArch();
1266
1267    // start pty magic before the loop
1268    StartPtyMagic();
1269
1270    // Tell the progress that its starting and fork dpkg
1271    d->progress->Start(d->master);
1272
1273    // this loop is runs once per dpkg operation
1274    vector<Item>::const_iterator I = List.begin();
1275    while (I != List.end())
1276    {
1277       // Do all actions with the same Op in one run
1278       vector<Item>::const_iterator J = I;
1279       if (TriggersPending == true)
1280          for (; J != List.end(); ++J)
1281          {
1282             if (J->Op == I->Op)
1283                continue;
1284             if (J->Op != Item::TriggersPending)
1285                break;
1286             vector<Item>::const_iterator T = J + 1;
1287             if (T != List.end() && T->Op == I->Op)
1288                continue;
1289             break;
1290          }
1291       else
1292          for (; J != List.end() && J->Op == I->Op; ++J)
1293             /* nothing */;
1294
1295       // keep track of allocated strings for multiarch package names
1296       std::vector<char *> Packages;
1297
1298       // start with the baseset of arguments
1299       unsigned long Size = StartSize;
1300       Args.erase(Args.begin() + BaseArgs, Args.end());
1301
1302       // Now check if we are within the MaxArgs limit
1303       //
1304       // this code below is problematic, because it may happen that
1305       // the argument list is split in a way that A depends on B
1306       // and they are in the same "--configure A B" run
1307       // - with the split they may now be configured in different
1308       //   runs, using Immediate-Configure-All can help prevent this.
1309       if (J - I > (signed)MaxArgs)
1310       {
1311          J = I + MaxArgs;
1312          unsigned long const size = MaxArgs + 10;
1313          Args.reserve(size);
1314          Packages.reserve(size);
1315       }
1316       else
1317       {
1318          unsigned long const size = (J - I) + 10;
1319          Args.reserve(size);
1320          Packages.reserve(size);
1321       }
1322
1323       int fd[2];
1324       if (pipe(fd) != 0)
1325          return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
1326
1327 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
1328 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
1329
1330       ADDARGC("--status-fd");
1331       char status_fd_buf[20];
1332       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
1333       ADDARG(status_fd_buf);
1334       unsigned long const Op = I->Op;
1335
1336       switch (I->Op)
1337       {
1338          case Item::Remove:
1339          ADDARGC("--force-depends");
1340          ADDARGC("--force-remove-essential");
1341          ADDARGC("--remove");
1342          break;
1343
1344          case Item::Purge:
1345          ADDARGC("--force-depends");
1346          ADDARGC("--force-remove-essential");
1347          ADDARGC("--purge");
1348          break;
1349
1350          case Item::Configure:
1351          ADDARGC("--configure");
1352          break;
1353
1354          case Item::ConfigurePending:
1355          ADDARGC("--configure");
1356          ADDARGC("--pending");
1357          break;
1358
1359          case Item::TriggersPending:
1360          ADDARGC("--triggers-only");
1361          ADDARGC("--pending");
1362          break;
1363
1364          case Item::Install:
1365          ADDARGC("--unpack");
1366          ADDARGC("--auto-deconfigure");
1367          break;
1368       }
1369
1370       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1371           I->Op != Item::ConfigurePending)
1372       {
1373          ADDARGC("--no-triggers");
1374       }
1375 #undef ADDARGC
1376
1377       // Write in the file or package names
1378       if (I->Op == Item::Install)
1379       {
1380          for (;I != J && Size < MaxArgBytes; ++I)
1381          {
1382             if (I->File[0] != '/')
1383                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1384             Args.push_back(I->File.c_str());
1385             Size += I->File.length();
1386          }
1387       }
1388       else
1389       {
1390          string const nativeArch = _config->Find("APT::Architecture");
1391          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1392          for (;I != J && Size < MaxArgBytes; ++I)
1393          {
1394             if((*I).Pkg.end() == true)
1395                continue;
1396             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.FullName(true)) != disappearedPkgs.end())
1397                continue;
1398             // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
1399             if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
1400                                            strcmp(I->Pkg.Arch(), "all") == 0 ||
1401                                            strcmp(I->Pkg.Arch(), "none") == 0))
1402             {
1403                char const * const name = I->Pkg.Name();
1404                ADDARG(name);
1405             }
1406             else
1407             {
1408                pkgCache::VerIterator PkgVer;
1409                std::string name = I->Pkg.Name();
1410                if (Op == Item::Remove || Op == Item::Purge)
1411                {
1412                   PkgVer = I->Pkg.CurrentVer();
1413                   if(PkgVer.end() == true)
1414                      PkgVer = FindNowVersion(I->Pkg);
1415                }
1416                else
1417                   PkgVer = Cache[I->Pkg].InstVerIter(Cache);
1418                if (strcmp(I->Pkg.Arch(), "none") == 0)
1419                   ; // never arch-qualify a package without an arch
1420                else if (PkgVer.end() == false)
1421                   name.append(":").append(PkgVer.Arch());
1422                else
1423                   _error->Warning("Can not find PkgVer for '%s'", name.c_str());
1424                char * const fullname = strdup(name.c_str());
1425                Packages.push_back(fullname);
1426                ADDARG(fullname);
1427             }
1428          }
1429          // skip configure action if all sheduled packages disappeared
1430          if (oldSize == Size)
1431             continue;
1432       }
1433 #undef ADDARG
1434
1435       J = I;
1436
1437       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1438       {
1439          for (std::vector<const char *>::const_iterator a = Args.begin();
1440               a != Args.end(); ++a)
1441             clog << *a << ' ';
1442          clog << endl;
1443          for (std::vector<char *>::const_iterator p = Packages.begin();
1444                p != Packages.end(); ++p)
1445             free(*p);
1446          Packages.clear();
1447          continue;
1448       }
1449       Args.push_back(NULL);
1450
1451       cout << flush;
1452       clog << flush;
1453       cerr << flush;
1454
1455       /* Mask off sig int/quit. We do this because dpkg also does when
1456          it forks scripts. What happens is that when you hit ctrl-c it sends
1457          it to all processes in the group. Since dpkg ignores the signal
1458          it doesn't die but we do! So we must also ignore it */
1459       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1460       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1461
1462       // Check here for any SIGINT
1463       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1464          break;
1465
1466
1467       // ignore SIGHUP as well (debian #463030)
1468       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1469
1470       // now run dpkg
1471       d->progress->StartDpkg();
1472       std::set<int> KeepFDs;
1473       KeepFDs.insert(fd[1]);
1474       MergeKeepFdsFromConfiguration(KeepFDs);
1475       pid_t Child = ExecFork(KeepFDs);
1476       if (Child == 0)
1477       {
1478          // This is the child
1479          SetupSlavePtyMagic();
1480          close(fd[0]); // close the read end of the pipe
1481
1482          debSystem::DpkgChrootDirectory();
1483
1484          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1485             _exit(100);
1486
1487          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1488          {
1489             int Flags;
1490             int dummy = 0;
1491             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1492                _exit(100);
1493
1494             // Discard everything in stdin before forking dpkg
1495             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1496                _exit(100);
1497
1498             while (read(STDIN_FILENO,&dummy,1) == 1);
1499
1500             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1501                _exit(100);
1502          }
1503
1504          execvp(Args[0], (char**) &Args[0]);
1505          cerr << "Could not exec dpkg!" << endl;
1506          _exit(100);
1507       }
1508
1509       // apply ionice
1510       if (_config->FindB("DPkg::UseIoNice", false) == true)
1511          ionice(Child);
1512
1513       // Wait for dpkg
1514       int Status = 0;
1515
1516       // we read from dpkg here
1517       int const _dpkgin = fd[0];
1518       close(fd[1]);                        // close the write end of the pipe
1519
1520       // setups fds
1521       sigemptyset(&d->sigmask);
1522       sigprocmask(SIG_BLOCK,&d->sigmask,&d->original_sigmask);
1523
1524       /* free vectors (and therefore memory) as we don't need the included data anymore */
1525       for (std::vector<char *>::const_iterator p = Packages.begin();
1526            p != Packages.end(); ++p)
1527          free(*p);
1528       Packages.clear();
1529
1530       // the result of the waitpid call
1531       int res;
1532       int select_ret;
1533       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1534          if(res < 0) {
1535             // FIXME: move this to a function or something, looks ugly here
1536             // error handling, waitpid returned -1
1537             if (errno == EINTR)
1538                continue;
1539             RunScripts("DPkg::Post-Invoke");
1540
1541             // Restore sig int/quit
1542             signal(SIGQUIT,old_SIGQUIT);
1543             signal(SIGINT,old_SIGINT);
1544
1545             signal(SIGHUP,old_SIGHUP);
1546             return _error->Errno("waitpid","Couldn't wait for subprocess");
1547          }
1548
1549          // wait for input or output here
1550          FD_ZERO(&rfds);
1551          if (d->master >= 0 && d->direct_stdin == false && d->stdin_is_dev_null == false)
1552             FD_SET(STDIN_FILENO, &rfds);
1553          FD_SET(_dpkgin, &rfds);
1554          if(d->master >= 0)
1555             FD_SET(d->master, &rfds);
1556          tv.tv_sec = 0;
1557          tv.tv_nsec = d->progress->GetPulseInterval();
1558          select_ret = pselect(max(d->master, _dpkgin)+1, &rfds, NULL, NULL,
1559                               &tv, &d->original_sigmask);
1560          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1561             select_ret = racy_pselect(max(d->master, _dpkgin)+1, &rfds, NULL,
1562                                       NULL, &tv, &d->original_sigmask);
1563          d->progress->Pulse();
1564          if (select_ret == 0)
1565             continue;
1566          else if (select_ret < 0 && errno == EINTR)
1567             continue;
1568          else if (select_ret < 0)
1569          {
1570             perror("select() returned error");
1571             continue;
1572          }
1573
1574          if(d->master >= 0 && FD_ISSET(d->master, &rfds))
1575             DoTerminalPty(d->master);
1576          if(d->master >= 0 && FD_ISSET(0, &rfds))
1577             DoStdin(d->master);
1578          if(FD_ISSET(_dpkgin, &rfds))
1579             DoDpkgStatusFd(_dpkgin);
1580       }
1581       close(_dpkgin);
1582
1583       // Restore sig int/quit
1584       signal(SIGQUIT,old_SIGQUIT);
1585       signal(SIGINT,old_SIGINT);
1586
1587       signal(SIGHUP,old_SIGHUP);
1588       // Check for an error code.
1589       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1590       {
1591          // if it was set to "keep-dpkg-runing" then we won't return
1592          // here but keep the loop going and just report it as a error
1593          // for later
1594          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1595
1596          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1597             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1598          else if (WIFEXITED(Status) != 0)
1599             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1600          else
1601             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1602          _error->Error("%s", d->dpkg_error.c_str());
1603
1604          if(stopOnError)
1605             break;
1606       }
1607    }
1608    // dpkg is done at this point
1609    d->progress->Stop();
1610    StopPtyMagic();
1611    CloseLog();
1612
1613    if (pkgPackageManager::SigINTStop)
1614        _error->Warning(_("Operation was interrupted before it could finish"));
1615
1616    if (RunScripts("DPkg::Post-Invoke") == false)
1617       return false;
1618
1619    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1620    {
1621       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1622       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1623           RemoveFile("pkgDPkgPM::Go", oldpkgcache))
1624       {
1625          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1626          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1627          {
1628             _error->PushToStack();
1629             pkgCacheFile CacheFile;
1630             CacheFile.BuildCaches(NULL, true);
1631             _error->RevertToStack();
1632          }
1633       }
1634    }
1635
1636    Cache.writeStateFile(NULL);
1637    return d->dpkg_error.empty();
1638 }
1639
1640 void SigINT(int /*sig*/) {
1641    pkgPackageManager::SigINTStop = true;
1642 }
1643                                                                         /*}}}*/
1644 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1645 // ---------------------------------------------------------------------
1646 /* */
1647 void pkgDPkgPM::Reset()
1648 {
1649    List.erase(List.begin(),List.end());
1650 }
1651                                                                         /*}}}*/
1652 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1653 // ---------------------------------------------------------------------
1654 /* */
1655 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1656 {
1657    // If apport doesn't exist or isn't installed do nothing
1658    // This e.g. prevents messages in 'universes' without apport
1659    pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
1660    if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
1661       return;
1662
1663    string pkgname, reportfile, pkgver, arch;
1664    string::size_type pos;
1665    FILE *report;
1666
1667    if (_config->FindB("Dpkg::ApportFailureReport", true) == false)
1668    {
1669       std::clog << "configured to not write apport reports" << std::endl;
1670       return;
1671    }
1672
1673    // only report the first errors
1674    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1675    {
1676       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1677       return;
1678    }
1679
1680    // check if its not a follow up error
1681    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1682    if(strstr(errormsg, needle) != NULL) {
1683       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1684       return;
1685    }
1686
1687    // do not report disk-full failures
1688    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1689       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1690       return;
1691    }
1692
1693    // do not report out-of-memory failures
1694    if(strstr(errormsg, strerror(ENOMEM)) != NULL ||
1695       strstr(errormsg, "failed to allocate memory") != NULL) {
1696       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1697       return;
1698    }
1699
1700    // do not report bugs regarding inaccessible local files
1701    if(strstr(errormsg, strerror(ENOENT)) != NULL ||
1702       strstr(errormsg, "cannot access archive") != NULL) {
1703       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1704       return;
1705    }
1706
1707    // do not report errors encountered when decompressing packages
1708    if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) {
1709       std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
1710       return;
1711    }
1712
1713    // do not report dpkg I/O errors, this is a format string, so we compare
1714    // the prefix and the suffix of the error with the dpkg error message
1715    vector<string> io_errors;
1716    io_errors.push_back(string("failed to read"));
1717    io_errors.push_back(string("failed to write"));
1718    io_errors.push_back(string("failed to seek"));
1719    io_errors.push_back(string("unexpected end of file or stream"));
1720
1721    for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); ++I)
1722    {
1723       vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%');
1724       if (list.size() > 1) {
1725          // we need to split %s, VectorizeString only allows char so we need
1726          // to kill the "s" manually
1727          if (list[1].size() > 1) {
1728             list[1].erase(0, 1);
1729             if(strstr(errormsg, list[0].c_str()) &&
1730                strstr(errormsg, list[1].c_str())) {
1731                std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1732                return;
1733             }
1734          }
1735       }
1736    }
1737
1738    // get the pkgname and reportfile
1739    pkgname = flNotDir(pkgpath);
1740    pos = pkgname.find('_');
1741    if(pos != string::npos)
1742       pkgname = pkgname.substr(0, pos);
1743
1744    // find the package version and source package name
1745    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1746    if (Pkg.end() == true)
1747       return;
1748    pkgCache::VerIterator Ver = Cache.GetCandidateVersion(Pkg);
1749    if (Ver.end() == true)
1750       return;
1751    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1752
1753    // if the file exists already, we check:
1754    // - if it was reported already (touched by apport).
1755    //   If not, we do nothing, otherwise
1756    //    we overwrite it. This is the same behaviour as apport
1757    // - if we have a report with the same pkgversion already
1758    //   then we skip it
1759    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1760    if(FileExists(reportfile))
1761    {
1762       struct stat buf;
1763       char strbuf[255];
1764
1765       // check atime/mtime
1766       stat(reportfile.c_str(), &buf);
1767       if(buf.st_mtime > buf.st_atime)
1768          return;
1769
1770       // check if the existing report is the same version
1771       report = fopen(reportfile.c_str(),"r");
1772       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1773       {
1774          if(strstr(strbuf,"Package:") == strbuf)
1775          {
1776             char pkgname[255], version[255];
1777             if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
1778                if(strcmp(pkgver.c_str(), version) == 0)
1779                {
1780                   fclose(report);
1781                   return;
1782                }
1783          }
1784       }
1785       fclose(report);
1786    }
1787
1788    // now write the report
1789    arch = _config->Find("APT::Architecture");
1790    report = fopen(reportfile.c_str(),"w");
1791    if(report == NULL)
1792       return;
1793    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1794       chmod(reportfile.c_str(), 0);
1795    else
1796       chmod(reportfile.c_str(), 0600);
1797    fprintf(report, "ProblemType: Package\n");
1798    fprintf(report, "Architecture: %s\n", arch.c_str());
1799    time_t now = time(NULL);
1800    char ctime_buf[26];  // need at least 26 bytes according to ctime(3)
1801    fprintf(report, "Date: %s" , ctime_r(&now, ctime_buf));
1802    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1803    fprintf(report, "SourcePackage: %s\n", Ver.SourcePkgName());
1804    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1805
1806    // ensure that the log is flushed
1807    if(d->term_out)
1808       fflush(d->term_out);
1809
1810    // attach terminal log it if we have it
1811    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1812    if (!logfile_name.empty())
1813    {
1814       FILE *log = NULL;
1815
1816       fprintf(report, "DpkgTerminalLog:\n");
1817       log = fopen(logfile_name.c_str(),"r");
1818       if(log != NULL)
1819       {
1820          char buf[1024];
1821          while( fgets(buf, sizeof(buf), log) != NULL)
1822             fprintf(report, " %s", buf);
1823          fprintf(report, " \n");
1824          fclose(log);
1825       }
1826    }
1827
1828    // attach history log it if we have it
1829    string histfile_name = _config->FindFile("Dir::Log::History");
1830    if (!histfile_name.empty())
1831    {
1832       fprintf(report, "DpkgHistoryLog:\n");
1833       FILE* log = fopen(histfile_name.c_str(),"r");
1834       if(log != NULL)
1835       {
1836          char buf[1024];
1837          while( fgets(buf, sizeof(buf), log) != NULL)
1838             fprintf(report, " %s", buf);
1839          fclose(log);
1840       }
1841    }
1842
1843    // log the ordering, see dpkgpm.h and the "Ops" enum there
1844    const char *ops_str[] = {
1845       "Install",
1846       "Configure",
1847       "Remove",
1848       "Purge",
1849       "ConfigurePending",
1850       "TriggersPending",
1851    };
1852    fprintf(report, "AptOrdering:\n");
1853    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1854       if ((*I).Pkg != NULL)
1855          fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1856       else
1857          fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
1858
1859    // attach dmesg log (to learn about segfaults)
1860    if (FileExists("/bin/dmesg"))
1861    {
1862       fprintf(report, "Dmesg:\n");
1863       FILE *log = popen("/bin/dmesg","r");
1864       if(log != NULL)
1865       {
1866          char buf[1024];
1867          while( fgets(buf, sizeof(buf), log) != NULL)
1868             fprintf(report, " %s", buf);
1869          pclose(log);
1870       }
1871    }
1872
1873    // attach df -l log (to learn about filesystem status)
1874    if (FileExists("/bin/df"))
1875    {
1876
1877       fprintf(report, "Df:\n");
1878       FILE *log = popen("/bin/df -l","r");
1879       if(log != NULL)
1880       {
1881          char buf[1024];
1882          while( fgets(buf, sizeof(buf), log) != NULL)
1883             fprintf(report, " %s", buf);
1884          pclose(log);
1885       }
1886    }
1887
1888    fclose(report);
1889
1890 }
1891                                                                         /*}}}*/