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          const char *Args[4];
 328          Args[0] = "/bin/sh";
 329          Args[1] = "-c";
 330          Args[2] = Opts->Value.c_str();
 331          Args[3] = 0;
 332          execv(Args[0],(char **)Args);
 333          _exit(100);
 334       }
 335       close(Pipes[0]);
 336       FILE *F = fdopen(Pipes[1],"w");
 337       if (F == 0)
 338          return _error->Errno("fdopen","Faild to open new FD");
 339
 340       // Feed it the filenames.
 341       bool Die = false;
 342       if (Version <= 1)
 343       {
 344          for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 345          {
 346             // Only deal with packages to be installed from .deb
 347             if (I->Op != Item::Install)
 348                continue;
 349
 350             // No errors here..
 351             if (I->File[0] != '/')
 352                continue;
 353
 354             /* Feed the filename of each package that is pending install
 355                into the pipe. */
 356             fprintf(F,"%s\n",I->File.c_str());
 357             if (ferror(F) != 0)
 358             {
 359                Die = true;
 360                break;
 361             }
 362          }
 363       }
 364       else
 365          Die = !SendV2Pkgs(F);
 366
 367       fclose(F);
 368
 369       // Clean up the sub process
 370       if (ExecWait(Process,Opts->Value.c_str()) == false)
 371          return _error->Error("Failure running script %s",Opts->Value.c_str());
 372    }
 373
 374    return true;
 375 }
 376                                                                         /*}}}*/
 377 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 378 // ---------------------------------------------------------------------
 379 /*
 380 */
 381 void pkgDPkgPM::DoStdin(int master)
 382 {
 383    unsigned char input_buf[256] = {0,};
 384    ssize_t len = read(0, input_buf, sizeof(input_buf));
 385    if (len)
 386       write(master, input_buf, len);
 387    else
 388       d->stdin_is_dev_null = true;
 389 }
 390                                                                         /*}}}*/
 391 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 392 // ---------------------------------------------------------------------
 393 /*
 394  * read the terminal pty and write log
 395  */
 396 void pkgDPkgPM::DoTerminalPty(int master)
 397 {
 398    unsigned char term_buf[1024] = {0,0, };
 399
 400    ssize_t len=read(master, term_buf, sizeof(term_buf));
 401    if(len == -1 && errno == EIO)
 402    {
 403       // this happens when the child is about to exit, we
 404       // give it time to actually exit, otherwise we run
 405       // into a race
 406       usleep(500000);
 407       return;
 408    }
 409    if(len <= 0)
 410       return;
 411    write(1, term_buf, len);
 412    if(d->term_out)
 413       fwrite(term_buf, len, sizeof(char), d->term_out);
 414 }
 415                                                                         /*}}}*/
 416 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 417 // ---------------------------------------------------------------------
 418 /*
 419  */
 420 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 421 {
 422    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 423    // the status we output
 424    ostringstream status;
 425
 426    if (Debug == true)
 427       std::clog << "got from dpkg '" << line << "'" << std::endl;
 428
 429
 430    /* dpkg sends strings like this:
 431       'status:   <pkg>:  <pkg  qstate>'
 432       errors look like this:
 433       '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
 434       and conffile-prompt like this
 435       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 436
 437       Newer versions of dpkg sent also:
 438       'processing: install: pkg'
 439       'processing: configure: pkg'
 440       'processing: remove: pkg'
 441       'processing: purge: pkg'
 442       'processing: disappear: pkg'
 443       'processing: trigproc: trigger'
 444
 445    */
 446    char* list[6];
 447    //        dpkg sends multiline error messages sometimes (see
 448    //        #374195 for a example. we should support this by
 449    //        either patching dpkg to not send multiline over the
 450    //        statusfd or by rewriting the code here to deal with
 451    //        it. for now we just ignore it and not crash
 452    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 453    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 454    {
 455       if (Debug == true)
 456          std::clog << "ignoring line: not enough ':'" << std::endl;
 457       return;
 458    }
 459    const char* const pkg = list[1];
 460    const char* action = _strstrip(list[2]);
 461
 462    // 'processing' from dpkg looks like
 463    // 'processing: action: pkg'
 464    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 465    {
 466       char s[200];
 467       const char* const pkg_or_trigger = _strstrip(list[2]);
 468       action = _strstrip( list[1]);
 469       const std::pair<const char *, const char *> * const iter =
 470         std::find_if(PackageProcessingOpsBegin,
 471                      PackageProcessingOpsEnd,
 472                      MatchProcessingOp(action));
 473       if(iter == PackageProcessingOpsEnd)
 474       {
 475          if (Debug == true)
 476             std::clog << "ignoring unknown action: " << action << std::endl;
 477          return;
 478       }
 479       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 480
 481       status << "pmstatus:" << pkg_or_trigger
 482              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 483              << ":" << s
 484              << endl;
 485       if(OutStatusFd > 0)
 486          write(OutStatusFd, status.str().c_str(), status.str().size());
 487       if (Debug == true)
 488          std::clog << "send: '" << status.str() << "'" << endl;
 489
 490       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 491          handleDisappearAction(pkg_or_trigger);
 492       return;
 493    }
 494
 495    if(strncmp(action,"error",strlen("error")) == 0)
 496    {
 497       // urgs, sometime has ":" in its error string so that we
 498       // end up with the error message split between list[3]
 499       // and list[4], e.g. the message:
 500       // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 501       // concat them again
 502       if( list[4] != NULL )
 503          list[3][strlen(list[3])] = ':';
 504
 505       status << "pmerror:" << list[1]
 506              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 507              << ":" << list[3]
 508              << endl;
 509       if(OutStatusFd > 0)
 510          write(OutStatusFd, status.str().c_str(), status.str().size());
 511       if (Debug == true)
 512          std::clog << "send: '" << status.str() << "'" << endl;
 513       pkgFailures++;
 514       WriteApportReport(list[1], list[3]);
 515       return;
 516    }
 517    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 518    {
 519       status << "pmconffile:" << list[1]
 520              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 521              << ":" << list[3]
 522              << endl;
 523       if(OutStatusFd > 0)
 524          write(OutStatusFd, status.str().c_str(), status.str().size());
 525       if (Debug == true)
 526          std::clog << "send: '" << status.str() << "'" << endl;
 527       return;
 528    }
 529
 530    vector<struct DpkgState> const &states = PackageOps[pkg];
 531    const char *next_action = NULL;
 532    if(PackageOpsDone[pkg] < states.size())
 533       next_action = states[PackageOpsDone[pkg]].state;
 534    // check if the package moved to the next dpkg state
 535    if(next_action && (strcmp(action, next_action) == 0))
 536    {
 537       // only read the translation if there is actually a next
 538       // action
 539       const char *translation = _(states[PackageOpsDone[pkg]].str);
 540       char s[200];
 541       snprintf(s, sizeof(s), translation, pkg);
 542
 543       // we moved from one dpkg state to a new one, report that
 544       PackageOpsDone[pkg]++;
 545       PackagesDone++;
 546       // build the status str
 547       status << "pmstatus:" << pkg
 548              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 549              << ":" << s
 550              << endl;
 551       if(OutStatusFd > 0)
 552          write(OutStatusFd, status.str().c_str(), status.str().size());
 553       if (Debug == true)
 554          std::clog << "send: '" << status.str() << "'" << endl;
 555    }
 556    if (Debug == true)
 557       std::clog << "(parsed from dpkg) pkg: " << pkg
 558                 << " action: " << action << endl;
 559 }
 560                                                                         /*}}}*/
 561 // DPkgPM::handleDisappearAction                                        /*{{{*/
 562 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 563 {
 564    // record the package name for display and stuff later
 565    disappearedPkgs.insert(pkgname);
 566
 567    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 568    if (unlikely(Pkg.end() == true))
 569       return;
 570    // the disappeared package was auto-installed - nothing to do
 571    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 572       return;
 573    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 574    if (unlikely(PkgVer.end() == true))
 575       return;
 576    /* search in the list of dependencies for (Pre)Depends,
 577       check if this dependency has a Replaces on our package
 578       and if so transfer the manual installed flag to it */
 579    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 580    {
 581       if (Dep->Type != pkgCache::Dep::Depends &&
 582           Dep->Type != pkgCache::Dep::PreDepends)
 583          continue;
 584       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 585       if (unlikely(Tar.end() == true))
 586          continue;
 587       // the package is already marked as manual
 588       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 589          continue;
 590       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 591       if (TarVer.end() == true)
 592          continue;
 593       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 594       {
 595          if (Rep->Type != pkgCache::Dep::Replaces)
 596             continue;
 597          if (Pkg != Rep.TargetPkg())
 598             continue;
 599          // okay, they are strongly connected - transfer manual-bit
 600          if (Debug == true)
 601             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 602          Cache[Tar].Flags &= ~Flag::Auto;
 603          break;
 604       }
 605    }
 606 }
 607                                                                         /*}}}*/
 608 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 609 // ---------------------------------------------------------------------
 610 /*
 611  */
 612 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 613 {
 614    char *p, *q;
 615    int len;
 616
 617    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 618    d->dpkgbuf_pos += len;
 619    if(len <= 0)
 620       return;
 621
 622    // process line by line if we have a buffer
 623    p = q = d->dpkgbuf;
 624    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 625    {
 626       *q = 0;
 627       ProcessDpkgStatusLine(OutStatusFd, p);
 628       p=q+1; // continue with next line
 629    }
 630
 631    // now move the unprocessed bits (after the final \n that is now a 0x0)
 632    // to the start and update d->dpkgbuf_pos
 633    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 634    if(p == NULL)
 635       return;
 636
 637    // we are interessted in the first char *after* 0x0
 638    p++;
 639
 640    // move the unprocessed tail to the start and update pos
 641    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 642    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 643 }
 644                                                                         /*}}}*/
 645 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 646 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 647 {
 648    size_t const length = value.length();
 649    if (length == 0)
 650       return;
 651    // poor mans rstrip(", ")
 652    if (value[length-2] == ',' && value[length-1] == ' ')
 653       value.erase(length - 2, 2);
 654    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 655 }                                                                       /*}}}*/
 656 // DPkgPM::OpenLog                                                      /*{{{*/
 657 bool pkgDPkgPM::OpenLog()
 658 {
 659    string const logdir = _config->FindDir("Dir::Log");
 660    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 661       // FIXME: use a better string after freeze
 662       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 663
 664    // get current time
 665    char timestr[200];
 666    time_t const t = time(NULL);
 667    struct tm const * const tmp = localtime(&t);
 668    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 669
 670    // open terminal log
 671    string const logfile_name = flCombine(logdir,
 672                                    _config->Find("Dir::Log::Terminal"));
 673    if (!logfile_name.empty())
 674    {
 675       d->term_out = fopen(logfile_name.c_str(),"a");
 676       if (d->term_out == NULL)
 677          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 678       setvbuf(d->term_out, NULL, _IONBF, 0);
 679       SetCloseExec(fileno(d->term_out), true);
 680       chmod(logfile_name.c_str(), 0600);
 681       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 682    }
 683
 684    // write your history
 685    string const history_name = flCombine(logdir,
 686                                    _config->Find("Dir::Log::History"));
 687    if (!history_name.empty())
 688    {
 689       d->history_out = fopen(history_name.c_str(),"a");
 690       if (d->history_out == NULL)
 691          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 692       chmod(history_name.c_str(), 0644);
 693       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 694       string remove, purge, install, upgrade, downgrade;
 695       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
 696       {
 697          if (Cache[I].NewInstall())
 698          {
 699             install += I.FullName(false) + string(" (") + Cache[I].CandVersion;
 700             if (Cache[I].Flags & pkgCache::Flag::Auto)
 701                install+= ", automatic";
 702             install += string("), ");
 703          }
 704          else if (Cache[I].Upgrade())
 705             upgrade += I.FullName(false) + string(" (") + Cache[I].CurVersion + string(", ") + Cache[I].CandVersion + string("), ");
 706          else if (Cache[I].Downgrade())
 707             downgrade += I.FullName(false) + string(" (") + Cache[I].CurVersion + string(", ") + Cache[I].CandVersion + string("), ");
 708          else if (Cache[I].Delete())
 709          {
 710             if ((Cache[I].iFlags & pkgDepCache::Purge) == pkgDepCache::Purge)
 711                purge += I.FullName(false) + string(" (") + Cache[I].CurVersion + string("), ");
 712             else
 713                remove += I.FullName(false) + string(" (") + Cache[I].CurVersion + string("), ");
 714          }
 715       }
 716       if (_config->Exists("Commandline::AsString") == true)
 717          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 718       WriteHistoryTag("Install", install);
 719       WriteHistoryTag("Upgrade", upgrade);
 720       WriteHistoryTag("Downgrade",downgrade);
 721       WriteHistoryTag("Remove",remove);
 722       WriteHistoryTag("Purge",purge);
 723       fflush(d->history_out);
 724    }
 725
 726    return true;
 727 }
 728                                                                         /*}}}*/
 729 // DPkg::CloseLog                                                       /*{{{*/
 730 bool pkgDPkgPM::CloseLog()
 731 {
 732    char timestr[200];
 733    time_t t = time(NULL);
 734    struct tm *tmp = localtime(&t);
 735    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 736
 737    if(d->term_out)
 738    {
 739       fprintf(d->term_out, "Log ended: ");
 740       fprintf(d->term_out, "%s", timestr);
 741       fprintf(d->term_out, "\n");
 742       fclose(d->term_out);
 743    }
 744    d->term_out = NULL;
 745
 746    if(d->history_out)
 747    {
 748       if (disappearedPkgs.empty() == false)
 749       {
 750          string disappear;
 751          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 752               d != disappearedPkgs.end(); ++d)
 753          {
 754             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 755             disappear.append(*d);
 756             if (P.end() == true)
 757                disappear.append(", ");
 758             else
 759                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 760          }
 761          WriteHistoryTag("Disappeared", disappear);
 762       }
 763       if (d->dpkg_error.empty() == false)
 764          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 765       fprintf(d->history_out, "End-Date: %s\n", timestr);
 766       fclose(d->history_out);
 767    }
 768    d->history_out = NULL;
 769
 770    return true;
 771 }
 772                                                                         /*}}}*/
 773 /*{{{*/
 774 // This implements a racy version of pselect for those architectures
 775 // that don't have a working implementation.
 776 // FIXME: Probably can be removed on Lenny+1
 777 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 778    fd_set *exceptfds, const struct timespec *timeout,
 779    const sigset_t *sigmask)
 780 {
 781    sigset_t origmask;
 782    struct timeval tv;
 783    int retval;
 784
 785    tv.tv_sec = timeout->tv_sec;
 786    tv.tv_usec = timeout->tv_nsec/1000;
 787
 788    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 789    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 790    sigprocmask(SIG_SETMASK, &origmask, 0);
 791    return retval;
 792 }
 793 /*}}}*/
 794 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 795 // ---------------------------------------------------------------------
 796 /* This globs the operations and calls dpkg
 797  *
 798  * If it is called with "OutStatusFd" set to a valid file descriptor
 799  * apt will report the install progress over this fd. It maps the
 800  * dpkg states a package goes through to human readable (and i10n-able)
 801  * names and calculates a percentage for each step.
 802 */
 803 bool pkgDPkgPM::Go(int OutStatusFd)
 804 {
 805    fd_set rfds;
 806    struct timespec tv;
 807    sigset_t sigmask;
 808    sigset_t original_sigmask;
 809
 810    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 811    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 812    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 813
 814    if (RunScripts("DPkg::Pre-Invoke") == false)
 815       return false;
 816
 817    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 818       return false;
 819
 820    // support subpressing of triggers processing for special
 821    // cases like d-i that runs the triggers handling manually
 822    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 823    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 824    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 825       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 826
 827    // map the dpkg states to the operations that are performed
 828    // (this is sorted in the same way as Item::Ops)
 829    static const struct DpkgState DpkgStatesOpMap[][7] = {
 830       // Install operation
 831       {
 832          {"half-installed", N_("Preparing %s")},
 833          {"unpacked", N_("Unpacking %s") },
 834          {NULL, NULL}
 835       },
 836       // Configure operation
 837       {
 838          {"unpacked",N_("Preparing to configure %s") },
 839          {"half-configured", N_("Configuring %s") },
 840          { "installed", N_("Installed %s")},
 841          {NULL, NULL}
 842       },
 843       // Remove operation
 844       {
 845          {"half-configured", N_("Preparing for removal of %s")},
 846          {"half-installed", N_("Removing %s")},
 847          {"config-files",  N_("Removed %s")},
 848          {NULL, NULL}
 849       },
 850       // Purge operation
 851       {
 852          {"config-files", N_("Preparing to completely remove %s")},
 853          {"not-installed", N_("Completely removed %s")},
 854          {NULL, NULL}
 855       },
 856    };
 857
 858    // init the PackageOps map, go over the list of packages that
 859    // that will be [installed|configured|removed|purged] and add
 860    // them to the PackageOps map (the dpkg states it goes through)
 861    // and the PackageOpsTranslations (human readable strings)
 862    for (vector<Item>::const_iterator I = List.begin(); I != List.end();I++)
 863    {
 864       if((*I).Pkg.end() == true)
 865          continue;
 866
 867       string const name = (*I).Pkg.Name();
 868       PackageOpsDone[name] = 0;
 869       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 870       {
 871          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 872          PackagesTotal++;
 873       }
 874    }
 875
 876    d->stdin_is_dev_null = false;
 877
 878    // create log
 879    OpenLog();
 880
 881    // this loop is runs once per operation
 882    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
 883    {
 884       // Do all actions with the same Op in one run
 885       vector<Item>::const_iterator J = I;
 886       if (TriggersPending == true)
 887          for (; J != List.end(); J++)
 888          {
 889             if (J->Op == I->Op)
 890                continue;
 891             if (J->Op != Item::TriggersPending)
 892                break;
 893             vector<Item>::const_iterator T = J + 1;
 894             if (T != List.end() && T->Op == I->Op)
 895                continue;
 896             break;
 897          }
 898       else
 899          for (; J != List.end() && J->Op == I->Op; J++)
 900             /* nothing */;
 901
 902       // Generate the argument list
 903       const char *Args[MaxArgs + 50];
 904
 905       // Now check if we are within the MaxArgs limit
 906       //
 907       // this code below is problematic, because it may happen that
 908       // the argument list is split in a way that A depends on B
 909       // and they are in the same "--configure A B" run
 910       // - with the split they may now be configured in different
 911       //   runs
 912       if (J - I > (signed)MaxArgs)
 913          J = I + MaxArgs;
 914
 915       unsigned int n = 0;
 916       unsigned long Size = 0;
 917       string const Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 918       Args[n++] = Tmp.c_str();
 919       Size += strlen(Args[n-1]);
 920
 921       // Stick in any custom dpkg options
 922       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 923       if (Opts != 0)
 924       {
 925          Opts = Opts->Child;
 926          for (; Opts != 0; Opts = Opts->Next)
 927          {
 928             if (Opts->Value.empty() == true)
 929                continue;
 930             Args[n++] = Opts->Value.c_str();
 931             Size += Opts->Value.length();
 932          }
 933       }
 934
 935       char status_fd_buf[20];
 936       int fd[2];
 937       pipe(fd);
 938
 939       Args[n++] = "--status-fd";
 940       Size += strlen(Args[n-1]);
 941       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 942       Args[n++] = status_fd_buf;
 943       Size += strlen(Args[n-1]);
 944
 945       switch (I->Op)
 946       {
 947          case Item::Remove:
 948          Args[n++] = "--force-depends";
 949          Size += strlen(Args[n-1]);
 950          Args[n++] = "--force-remove-essential";
 951          Size += strlen(Args[n-1]);
 952          Args[n++] = "--remove";
 953          Size += strlen(Args[n-1]);
 954          break;
 955
 956          case Item::Purge:
 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++] = "--purge";
 962          Size += strlen(Args[n-1]);
 963          break;
 964
 965          case Item::Configure:
 966          Args[n++] = "--configure";
 967          Size += strlen(Args[n-1]);
 968          break;
 969
 970          case Item::ConfigurePending:
 971          Args[n++] = "--configure";
 972          Size += strlen(Args[n-1]);
 973          Args[n++] = "--pending";
 974          Size += strlen(Args[n-1]);
 975          break;
 976
 977          case Item::TriggersPending:
 978          Args[n++] = "--triggers-only";
 979          Size += strlen(Args[n-1]);
 980          Args[n++] = "--pending";
 981          Size += strlen(Args[n-1]);
 982          break;
 983
 984          case Item::Install:
 985          Args[n++] = "--unpack";
 986          Size += strlen(Args[n-1]);
 987          Args[n++] = "--auto-deconfigure";
 988          Size += strlen(Args[n-1]);
 989          break;
 990       }
 991
 992       if (NoTriggers == true && I->Op != Item::TriggersPending &&
 993           I->Op != Item::ConfigurePending)
 994       {
 995          Args[n++] = "--no-triggers";
 996          Size += strlen(Args[n-1]);
 997       }
 998
 999       // Write in the file or package names
1000       if (I->Op == Item::Install)
1001       {
1002          for (;I != J && Size < MaxArgBytes; I++)
1003          {
1004             if (I->File[0] != '/')
1005                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1006             Args[n++] = I->File.c_str();
1007             Size += strlen(Args[n-1]);
1008          }
1009       }
1010       else
1011       {
1012          for (;I != J && Size < MaxArgBytes; I++)
1013          {
1014             if((*I).Pkg.end() == true)
1015                continue;
1016             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1017                continue;
1018             Args[n++] = I->Pkg.Name();
1019             Size += strlen(Args[n-1]);
1020          }
1021       }
1022       Args[n] = 0;
1023       J = I;
1024
1025       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1026       {
1027          for (unsigned int k = 0; k != n; k++)
1028             clog << Args[k] << ' ';
1029          clog << endl;
1030          continue;
1031       }
1032
1033       cout << flush;
1034       clog << flush;
1035       cerr << flush;
1036
1037       /* Mask off sig int/quit. We do this because dpkg also does when
1038          it forks scripts. What happens is that when you hit ctrl-c it sends
1039          it to all processes in the group. Since dpkg ignores the signal
1040          it doesn't die but we do! So we must also ignore it */
1041       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1042       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
1043
1044       // ignore SIGHUP as well (debian #463030)
1045       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1046
1047       struct    termios tt;
1048       struct    winsize win;
1049       int       master = -1;
1050       int       slave = -1;
1051
1052       // if tcgetattr does not return zero there was a error
1053       // and we do not do any pty magic
1054       if (tcgetattr(0, &tt) == 0)
1055       {
1056          ioctl(0, TIOCGWINSZ, (char *)&win);
1057          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1058          {
1059             const char *s = _("Can not write log, openpty() "
1060                               "failed (/dev/pts not mounted?)\n");
1061             fprintf(stderr, "%s",s);
1062             if(d->term_out)
1063               fprintf(d->term_out, "%s",s);
1064             master = slave = -1;
1065          }  else {
1066             struct termios rtt;
1067             rtt = tt;
1068             cfmakeraw(&rtt);
1069             rtt.c_lflag &= ~ECHO;
1070             rtt.c_lflag |= ISIG;
1071             // block SIGTTOU during tcsetattr to prevent a hang if
1072             // the process is a member of the background process group
1073             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1074             sigemptyset(&sigmask);
1075             sigaddset(&sigmask, SIGTTOU);
1076             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1077             tcsetattr(0, TCSAFLUSH, &rtt);
1078             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1079          }
1080       }
1081
1082        // Fork dpkg
1083       pid_t Child;
1084       _config->Set("APT::Keep-Fds::",fd[1]);
1085       // send status information that we are about to fork dpkg
1086       if(OutStatusFd > 0) {
1087          ostringstream status;
1088          status << "pmstatus:dpkg-exec:"
1089                 << (PackagesDone/float(PackagesTotal)*100.0)
1090                 << ":" << _("Running dpkg")
1091                 << endl;
1092          write(OutStatusFd, status.str().c_str(), status.str().size());
1093       }
1094       Child = ExecFork();
1095
1096       // This is the child
1097       if (Child == 0)
1098       {
1099          if(slave >= 0 && master >= 0)
1100          {
1101             setsid();
1102             ioctl(slave, TIOCSCTTY, 0);
1103             close(master);
1104             dup2(slave, 0);
1105             dup2(slave, 1);
1106             dup2(slave, 2);
1107             close(slave);
1108          }
1109          close(fd[0]); // close the read end of the pipe
1110
1111          if (_config->FindDir("DPkg::Chroot-Directory","/") != "/")
1112          {
1113             std::cerr << "Chrooting into "
1114                       << _config->FindDir("DPkg::Chroot-Directory")
1115                       << std::endl;
1116             if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0)
1117                _exit(100);
1118          }
1119
1120          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1121             _exit(100);
1122
1123          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1124          {
1125             int Flags,dummy;
1126             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1127                _exit(100);
1128
1129             // Discard everything in stdin before forking dpkg
1130             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1131                _exit(100);
1132
1133             while (read(STDIN_FILENO,&dummy,1) == 1);
1134
1135             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1136                _exit(100);
1137          }
1138
1139          /* No Job Control Stop Env is a magic dpkg var that prevents it
1140             from using sigstop */
1141          putenv((char *)"DPKG_NO_TSTP=yes");
1142          execvp(Args[0],(char **)Args);
1143          cerr << "Could not exec dpkg!" << endl;
1144          _exit(100);
1145       }
1146
1147       // apply ionice
1148       if (_config->FindB("DPkg::UseIoNice", false) == true)
1149          ionice(Child);
1150
1151       // clear the Keep-Fd again
1152       _config->Clear("APT::Keep-Fds",fd[1]);
1153
1154       // Wait for dpkg
1155       int Status = 0;
1156
1157       // we read from dpkg here
1158       int const _dpkgin = fd[0];
1159       close(fd[1]);                        // close the write end of the pipe
1160
1161       if(slave > 0)
1162          close(slave);
1163
1164       // setups fds
1165       sigemptyset(&sigmask);
1166       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1167
1168       // the result of the waitpid call
1169       int res;
1170       int select_ret;
1171       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1172          if(res < 0) {
1173             // FIXME: move this to a function or something, looks ugly here
1174             // error handling, waitpid returned -1
1175             if (errno == EINTR)
1176                continue;
1177             RunScripts("DPkg::Post-Invoke");
1178
1179             // Restore sig int/quit
1180             signal(SIGQUIT,old_SIGQUIT);
1181             signal(SIGINT,old_SIGINT);
1182             signal(SIGHUP,old_SIGHUP);
1183             return _error->Errno("waitpid","Couldn't wait for subprocess");
1184          }
1185
1186          // wait for input or output here
1187          FD_ZERO(&rfds);
1188          if (master >= 0 && !d->stdin_is_dev_null)
1189             FD_SET(0, &rfds);
1190          FD_SET(_dpkgin, &rfds);
1191          if(master >= 0)
1192             FD_SET(master, &rfds);
1193          tv.tv_sec = 1;
1194          tv.tv_nsec = 0;
1195          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1196                               &tv, &original_sigmask);
1197          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1198             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1199                                       NULL, &tv, &original_sigmask);
1200          if (select_ret == 0)
1201             continue;
1202          else if (select_ret < 0 && errno == EINTR)
1203             continue;
1204          else if (select_ret < 0)
1205          {
1206             perror("select() returned error");
1207             continue;
1208          }
1209
1210          if(master >= 0 && FD_ISSET(master, &rfds))
1211             DoTerminalPty(master);
1212          if(master >= 0 && FD_ISSET(0, &rfds))
1213             DoStdin(master);
1214          if(FD_ISSET(_dpkgin, &rfds))
1215             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1216       }
1217       close(_dpkgin);
1218
1219       // Restore sig int/quit
1220       signal(SIGQUIT,old_SIGQUIT);
1221       signal(SIGINT,old_SIGINT);
1222       signal(SIGHUP,old_SIGHUP);
1223
1224       if(master >= 0)
1225       {
1226          tcsetattr(0, TCSAFLUSH, &tt);
1227          close(master);
1228       }
1229
1230       // Check for an error code.
1231       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1232       {
1233          // if it was set to "keep-dpkg-runing" then we won't return
1234          // here but keep the loop going and just report it as a error
1235          // for later
1236          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1237
1238          if(stopOnError)
1239             RunScripts("DPkg::Post-Invoke");
1240
1241          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1242             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1243          else if (WIFEXITED(Status) != 0)
1244             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1245          else
1246             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1247
1248          if(d->dpkg_error.size() > 0)
1249             _error->Error(d->dpkg_error.c_str());
1250
1251          if(stopOnError)
1252          {
1253             CloseLog();
1254             return false;
1255          }
1256       }
1257    }
1258    CloseLog();
1259
1260    if (RunScripts("DPkg::Post-Invoke") == false)
1261       return false;
1262
1263    Cache.writeStateFile(NULL);
1264    return true;
1265 }
1266                                                                         /*}}}*/
1267 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1268 // ---------------------------------------------------------------------
1269 /* */
1270 void pkgDPkgPM::Reset()
1271 {
1272    List.erase(List.begin(),List.end());
1273 }
1274                                                                         /*}}}*/
1275 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1276 // ---------------------------------------------------------------------
1277 /* */
1278 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1279 {
1280    string pkgname, reportfile, srcpkgname, pkgver, arch;
1281    string::size_type pos;
1282    FILE *report;
1283
1284    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1285    {
1286       std::clog << "configured to not write apport reports" << std::endl;
1287       return;
1288    }
1289
1290    // only report the first errors
1291    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1292    {
1293       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1294       return;
1295    }
1296
1297    // check if its not a follow up error
1298    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1299    if(strstr(errormsg, needle) != NULL) {
1300       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1301       return;
1302    }
1303
1304    // do not report disk-full failures
1305    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1306       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1307       return;
1308    }
1309
1310    // do not report out-of-memory failures
1311    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1312       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1313       return;
1314    }
1315
1316    // do not report dpkg I/O errors
1317    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1318    if(strstr(errormsg, "short read in buffer_copy (")) {
1319       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1320       return;
1321    }
1322
1323    // get the pkgname and reportfile
1324    pkgname = flNotDir(pkgpath);
1325    pos = pkgname.find('_');
1326    if(pos != string::npos)
1327       pkgname = pkgname.substr(0, pos);
1328
1329    // find the package versin and source package name
1330    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1331    if (Pkg.end() == true)
1332       return;
1333    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1334    if (Ver.end() == true)
1335       return;
1336    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1337    pkgRecords Recs(Cache);
1338    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1339    srcpkgname = Parse.SourcePkg();
1340    if(srcpkgname.empty())
1341       srcpkgname = pkgname;
1342
1343    // if the file exists already, we check:
1344    // - if it was reported already (touched by apport).
1345    //   If not, we do nothing, otherwise
1346    //    we overwrite it. This is the same behaviour as apport
1347    // - if we have a report with the same pkgversion already
1348    //   then we skip it
1349    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1350    if(FileExists(reportfile))
1351    {
1352       struct stat buf;
1353       char strbuf[255];
1354
1355       // check atime/mtime
1356       stat(reportfile.c_str(), &buf);
1357       if(buf.st_mtime > buf.st_atime)
1358          return;
1359
1360       // check if the existing report is the same version
1361       report = fopen(reportfile.c_str(),"r");
1362       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1363       {
1364          if(strstr(strbuf,"Package:") == strbuf)
1365          {
1366             char pkgname[255], version[255];
1367             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
1368                if(strcmp(pkgver.c_str(), version) == 0)
1369                {
1370                   fclose(report);
1371                   return;
1372                }
1373          }
1374       }
1375       fclose(report);
1376    }
1377
1378    // now write the report
1379    arch = _config->Find("APT::Architecture");
1380    report = fopen(reportfile.c_str(),"w");
1381    if(report == NULL)
1382       return;
1383    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1384       chmod(reportfile.c_str(), 0);
1385    else
1386       chmod(reportfile.c_str(), 0600);
1387    fprintf(report, "ProblemType: Package\n");
1388    fprintf(report, "Architecture: %s\n", arch.c_str());
1389    time_t now = time(NULL);
1390    fprintf(report, "Date: %s" , ctime(&now));
1391    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1392    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1393    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1394
1395    // ensure that the log is flushed
1396    if(d->term_out)
1397       fflush(d->term_out);
1398
1399    // attach terminal log it if we have it
1400    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1401    if (!logfile_name.empty())
1402    {
1403       FILE *log = NULL;
1404       char buf[1024];
1405
1406       fprintf(report, "DpkgTerminalLog:\n");
1407       log = fopen(logfile_name.c_str(),"r");
1408       if(log != NULL)
1409       {
1410          while( fgets(buf, sizeof(buf), log) != NULL)
1411             fprintf(report, " %s", buf);
1412          fclose(log);
1413       }
1414    }
1415
1416    // log the ordering
1417    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1418    fprintf(report, "AptOrdering:\n");
1419    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
1420       fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1421
1422    // attach dmesg log (to learn about segfaults)
1423    if (FileExists("/bin/dmesg"))
1424    {
1425       FILE *log = NULL;
1426       char buf[1024];
1427
1428       fprintf(report, "Dmesg:\n");
1429       log = popen("/bin/dmesg","r");
1430       if(log != NULL)
1431       {
1432          while( fgets(buf, sizeof(buf), log) != NULL)
1433             fprintf(report, " %s", buf);
1434          fclose(log);
1435       }
1436    }
1437
1438    // attach df -l log (to learn about filesystem status)
1439    if (FileExists("/bin/df"))
1440    {
1441       FILE *log = NULL;
1442       char buf[1024];
1443
1444       fprintf(report, "Df:\n");
1445       log = popen("/bin/df -l","r");
1446       if(log != NULL)
1447       {
1448          while( fgets(buf, sizeof(buf), log) != NULL)
1449             fprintf(report, " %s", buf);
1450          fclose(log);
1451       }
1452    }
1453
1454    fclose(report);
1455
1456 }
1457                                                                         /*}}}*/