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/types.h>
  25 #include <sys/wait.h>
  26 #include <signal.h>
  27 #include <errno.h>
  28 #include <stdio.h>
  29 #include <sstream>
  30 #include <map>
  31
  32 #include <termios.h>
  33 #include <unistd.h>
  34 #include <sys/ioctl.h>
  35 #include <pty.h>
  36
  37 #include <config.h>
  38 #include <apti18n.h>
  39                                                                         /*}}}*/
  40
  41 using namespace std;
  42
  43
  44
  45 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
  46 // ---------------------------------------------------------------------
  47 /* */
  48 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
  49    : pkgPackageManager(Cache), dpkgbuf_pos(0),
  50      term_out(NULL), PackagesDone(0), PackagesTotal(0), pkgFailures(0)
  51 {
  52 }
  53                                                                         /*}}}*/
  54 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
  55 // ---------------------------------------------------------------------
  56 /* */
  57 pkgDPkgPM::~pkgDPkgPM()
  58 {
  59 }
  60                                                                         /*}}}*/
  61 // DPkgPM::Install - Install a package                                  /*{{{*/
  62 // ---------------------------------------------------------------------
  63 /* Add an install operation to the sequence list */
  64 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
  65 {
  66    if (File.empty() == true || Pkg.end() == true)
  67       return _error->Error("Internal Error, No file name for %s",Pkg.Name());
  68
  69    List.push_back(Item(Item::Install,Pkg,File));
  70    return true;
  71 }
  72                                                                         /*}}}*/
  73 // DPkgPM::Configure - Configure a package                              /*{{{*/
  74 // ---------------------------------------------------------------------
  75 /* Add a configure operation to the sequence list */
  76 bool pkgDPkgPM::Configure(PkgIterator Pkg)
  77 {
  78    if (Pkg.end() == true)
  79       return false;
  80
  81    List.push_back(Item(Item::Configure,Pkg));
  82    return true;
  83 }
  84                                                                         /*}}}*/
  85 // DPkgPM::Remove - Remove a package                                    /*{{{*/
  86 // ---------------------------------------------------------------------
  87 /* Add a remove operation to the sequence list */
  88 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
  89 {
  90    if (Pkg.end() == true)
  91       return false;
  92
  93    if (Purge == true)
  94       List.push_back(Item(Item::Purge,Pkg));
  95    else
  96       List.push_back(Item(Item::Remove,Pkg));
  97    return true;
  98 }
  99                                                                         /*}}}*/
 100 // DPkgPM::SendV2Pkgs - Send version 2 package info                     /*{{{*/
 101 // ---------------------------------------------------------------------
 102 /* This is part of the helper script communication interface, it sends
 103    very complete information down to the other end of the pipe.*/
 104 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 105 {
 106    fprintf(F,"VERSION 2\n");
 107
 108    /* Write out all of the configuration directives by walking the
 109       configuration tree */
 110    const Configuration::Item *Top = _config->Tree(0);
 111    for (; Top != 0;)
 112    {
 113       if (Top->Value.empty() == false)
 114       {
 115          fprintf(F,"%s=%s\n",
 116                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 117                  QuoteString(Top->Value,"\n").c_str());
 118       }
 119
 120       if (Top->Child != 0)
 121       {
 122          Top = Top->Child;
 123          continue;
 124       }
 125
 126       while (Top != 0 && Top->Next == 0)
 127          Top = Top->Parent;
 128       if (Top != 0)
 129          Top = Top->Next;
 130    }
 131    fprintf(F,"\n");
 132
 133    // Write out the package actions in order.
 134    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 135    {
 136       pkgDepCache::StateCache &S = Cache[I->Pkg];
 137
 138       fprintf(F,"%s ",I->Pkg.Name());
 139       // Current version
 140       if (I->Pkg->CurrentVer == 0)
 141          fprintf(F,"- ");
 142       else
 143          fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
 144
 145       // Show the compare operator
 146       // Target version
 147       if (S.InstallVer != 0)
 148       {
 149          int Comp = 2;
 150          if (I->Pkg->CurrentVer != 0)
 151             Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
 152          if (Comp < 0)
 153             fprintf(F,"> ");
 154          if (Comp == 0)
 155             fprintf(F,"= ");
 156          if (Comp > 0)
 157             fprintf(F,"< ");
 158          fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
 159       }
 160       else
 161          fprintf(F,"> - ");
 162
 163       // Show the filename/operation
 164       if (I->Op == Item::Install)
 165       {
 166          // No errors here..
 167          if (I->File[0] != '/')
 168             fprintf(F,"**ERROR**\n");
 169          else
 170             fprintf(F,"%s\n",I->File.c_str());
 171       }
 172       if (I->Op == Item::Configure)
 173          fprintf(F,"**CONFIGURE**\n");
 174       if (I->Op == Item::Remove ||
 175           I->Op == Item::Purge)
 176          fprintf(F,"**REMOVE**\n");
 177
 178       if (ferror(F) != 0)
 179          return false;
 180    }
 181    return true;
 182 }
 183                                                                         /*}}}*/
 184 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 185 // ---------------------------------------------------------------------
 186 /* This looks for a list of scripts to run from the configuration file
 187    each one is run and is fed on standard input a list of all .deb files
 188    that are due to be installed. */
 189 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 190 {
 191    Configuration::Item const *Opts = _config->Tree(Cnf);
 192    if (Opts == 0 || Opts->Child == 0)
 193       return true;
 194    Opts = Opts->Child;
 195
 196    unsigned int Count = 1;
 197    for (; Opts != 0; Opts = Opts->Next, Count++)
 198    {
 199       if (Opts->Value.empty() == true)
 200          continue;
 201
 202       // Determine the protocol version
 203       string OptSec = Opts->Value;
 204       string::size_type Pos;
 205       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 206          Pos = OptSec.length();
 207       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 208
 209       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 210
 211       // Create the pipes
 212       int Pipes[2];
 213       if (pipe(Pipes) != 0)
 214          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 215       SetCloseExec(Pipes[0],true);
 216       SetCloseExec(Pipes[1],true);
 217
 218       // Purified Fork for running the script
 219       pid_t Process = ExecFork();
 220       if (Process == 0)
 221       {
 222          // Setup the FDs
 223          dup2(Pipes[0],STDIN_FILENO);
 224          SetCloseExec(STDOUT_FILENO,false);
 225          SetCloseExec(STDIN_FILENO,false);
 226          SetCloseExec(STDERR_FILENO,false);
 227
 228          const char *Args[4];
 229          Args[0] = "/bin/sh";
 230          Args[1] = "-c";
 231          Args[2] = Opts->Value.c_str();
 232          Args[3] = 0;
 233          execv(Args[0],(char **)Args);
 234          _exit(100);
 235       }
 236       close(Pipes[0]);
 237       FILE *F = fdopen(Pipes[1],"w");
 238       if (F == 0)
 239          return _error->Errno("fdopen","Faild to open new FD");
 240
 241       // Feed it the filenames.
 242       bool Die = false;
 243       if (Version <= 1)
 244       {
 245          for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 246          {
 247             // Only deal with packages to be installed from .deb
 248             if (I->Op != Item::Install)
 249                continue;
 250
 251             // No errors here..
 252             if (I->File[0] != '/')
 253                continue;
 254
 255             /* Feed the filename of each package that is pending install
 256                into the pipe. */
 257             fprintf(F,"%s\n",I->File.c_str());
 258             if (ferror(F) != 0)
 259             {
 260                Die = true;
 261                break;
 262             }
 263          }
 264       }
 265       else
 266          Die = !SendV2Pkgs(F);
 267
 268       fclose(F);
 269
 270       // Clean up the sub process
 271       if (ExecWait(Process,Opts->Value.c_str()) == false)
 272          return _error->Error("Failure running script %s",Opts->Value.c_str());
 273    }
 274
 275    return true;
 276 }
 277                                                                         /*}}}*/
 278 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 279 // ---------------------------------------------------------------------
 280 /*
 281 */
 282 void pkgDPkgPM::DoStdin(int master)
 283 {
 284    unsigned char input_buf[256] = {0,};
 285    ssize_t len = read(0, input_buf, sizeof(input_buf));
 286    if (len)
 287       write(master, input_buf, len);
 288    else
 289       stdin_is_dev_null = true;
 290 }
 291                                                                         /*}}}*/
 292 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 293 // ---------------------------------------------------------------------
 294 /*
 295  * read the terminal pty and write log
 296  */
 297 void pkgDPkgPM::DoTerminalPty(int master)
 298 {
 299    unsigned char term_buf[1024] = {0,0, };
 300
 301    ssize_t len=read(master, term_buf, sizeof(term_buf));
 302    if(len == -1 && errno == EIO)
 303    {
 304       // this happens when the child is about to exit, we
 305       // give it time to actually exit, otherwise we run
 306       // into a race
 307       usleep(500000);
 308       return;
 309    }
 310    if(len <= 0)
 311       return;
 312    write(1, term_buf, len);
 313    if(term_out)
 314       fwrite(term_buf, len, sizeof(char), term_out);
 315 }
 316                                                                         /*}}}*/
 317 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 318 // ---------------------------------------------------------------------
 319 /*
 320  */
 321 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 322 {
 323    // the status we output
 324    ostringstream status;
 325
 326    if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 327       std::clog << "got from dpkg '" << line << "'" << std::endl;
 328
 329
 330    /* dpkg sends strings like this:
 331       'status:   <pkg>:  <pkg  qstate>'
 332       errors look like this:
 333       '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
 334       and conffile-prompt like this
 335       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 336
 337       Newer versions of dpkg sent also:
 338       'processing: install: pkg'
 339       'processing: configure: pkg'
 340       'processing: remove: pkg'
 341       'processing: trigproc: trigger'
 342
 343    */
 344    char* list[5];
 345    //        dpkg sends multiline error messages sometimes (see
 346    //        #374195 for a example. we should support this by
 347    //        either patching dpkg to not send multiline over the
 348    //        statusfd or by rewriting the code here to deal with
 349    //        it. for now we just ignore it and not crash
 350    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 351    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 352    {
 353       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 354          std::clog << "ignoring line: not enough ':'" << std::endl;
 355       return;
 356    }
 357    char *pkg = list[1];
 358    char *action = _strstrip(list[2]);
 359
 360    // 'processing' from dpkg looks like
 361    // 'processing: action: pkg'
 362    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 363    {
 364       char s[200];
 365       map<string,string>::iterator iter;
 366       char *pkg_or_trigger = _strstrip(list[2]);
 367       action =_strstrip( list[1]);
 368       iter = PackageProcessingOps.find(action);
 369       if(iter == PackageProcessingOps.end())
 370       {
 371          if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 372             std::clog << "ignoring unknwon action: " << action << std::endl;
 373          return;
 374       }
 375       snprintf(s, sizeof(s), _(iter->second.c_str()), pkg_or_trigger);
 376
 377       status << "pmstatus:" << pkg_or_trigger
 378              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 379              << ":" << s
 380              << endl;
 381       if(OutStatusFd > 0)
 382          write(OutStatusFd, status.str().c_str(), status.str().size());
 383       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 384          std::clog << "send: '" << status.str() << "'" << endl;
 385       return;
 386    }
 387
 388    if(strncmp(action,"error",strlen("error")) == 0)
 389    {
 390       status << "pmerror:" << list[1]
 391              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 392              << ":" << list[3]
 393              << endl;
 394       if(OutStatusFd > 0)
 395          write(OutStatusFd, status.str().c_str(), status.str().size());
 396       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 397          std::clog << "send: '" << status.str() << "'" << endl;
 398       pkgFailures++;
 399       WriteApportReport(list[1], list[3]);
 400       return;
 401    }
 402    if(strncmp(action,"conffile",strlen("conffile")) == 0)
 403    {
 404       status << "pmconffile:" << list[1]
 405              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 406              << ":" << list[3]
 407              << endl;
 408       if(OutStatusFd > 0)
 409          write(OutStatusFd, status.str().c_str(), status.str().size());
 410       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 411          std::clog << "send: '" << status.str() << "'" << endl;
 412       return;
 413    }
 414
 415    vector<struct DpkgState> &states = PackageOps[pkg];
 416    const char *next_action = NULL;
 417    if(PackageOpsDone[pkg] < states.size())
 418       next_action = states[PackageOpsDone[pkg]].state;
 419    // check if the package moved to the next dpkg state
 420    if(next_action && (strcmp(action, next_action) == 0))
 421    {
 422       // only read the translation if there is actually a next
 423       // action
 424       const char *translation = _(states[PackageOpsDone[pkg]].str);
 425       char s[200];
 426       snprintf(s, sizeof(s), translation, pkg);
 427
 428       // we moved from one dpkg state to a new one, report that
 429       PackageOpsDone[pkg]++;
 430       PackagesDone++;
 431       // build the status str
 432       status << "pmstatus:" << pkg
 433              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 434              << ":" << s
 435              << endl;
 436       if(OutStatusFd > 0)
 437          write(OutStatusFd, status.str().c_str(), status.str().size());
 438       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 439          std::clog << "send: '" << status.str() << "'" << endl;
 440    }
 441    if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 442       std::clog << "(parsed from dpkg) pkg: " << pkg
 443                 << " action: " << action << endl;
 444 }
 445
 446 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 447 // ---------------------------------------------------------------------
 448 /*
 449  */
 450 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 451 {
 452    char *p, *q;
 453    int len;
 454
 455    len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
 456    dpkgbuf_pos += len;
 457    if(len <= 0)
 458       return;
 459
 460    // process line by line if we have a buffer
 461    p = q = dpkgbuf;
 462    while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
 463    {
 464       *q = 0;
 465       ProcessDpkgStatusLine(OutStatusFd, p);
 466       p=q+1; // continue with next line
 467    }
 468
 469    // now move the unprocessed bits (after the final \n that is now a 0x0)
 470    // to the start and update dpkgbuf_pos
 471    p = (char*)memrchr(dpkgbuf, 0, dpkgbuf_pos);
 472    if(p == NULL)
 473       return;
 474
 475    // we are interessted in the first char *after* 0x0
 476    p++;
 477
 478    // move the unprocessed tail to the start and update pos
 479    memmove(dpkgbuf, p, p-dpkgbuf);
 480    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 481 }
 482                                                                         /*}}}*/
 483
 484 bool pkgDPkgPM::OpenLog()
 485 {
 486    string logdir = _config->FindDir("Dir::Log");
 487    if(not FileExists(logdir))
 488       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 489    string logfile_name = flCombine(logdir,
 490                                    _config->Find("Dir::Log::Terminal"));
 491    if (!logfile_name.empty())
 492    {
 493       term_out = fopen(logfile_name.c_str(),"a");
 494       chmod(logfile_name.c_str(), 0600);
 495       // output current time
 496       char outstr[200];
 497       time_t t = time(NULL);
 498       struct tm *tmp = localtime(&t);
 499       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 500       fprintf(term_out, "\nLog started: ");
 501       fprintf(term_out, outstr);
 502       fprintf(term_out, "\n");
 503    }
 504    return true;
 505 }
 506
 507 bool pkgDPkgPM::CloseLog()
 508 {
 509    if(term_out)
 510    {
 511       char outstr[200];
 512       time_t t = time(NULL);
 513       struct tm *tmp = localtime(&t);
 514       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 515       fprintf(term_out, "Log ended: ");
 516       fprintf(term_out, outstr);
 517       fprintf(term_out, "\n");
 518       fclose(term_out);
 519    }
 520    term_out = NULL;
 521    return true;
 522 }
 523
 524 /*{{{*/
 525 // This implements a racy version of pselect for those architectures
 526 // that don't have a working implementation.
 527 // FIXME: Probably can be removed on Lenny+1
 528 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 529    fd_set *exceptfds, const struct timespec *timeout,
 530    const sigset_t *sigmask)
 531 {
 532    sigset_t origmask;
 533    struct timeval tv;
 534    int retval;
 535
 536    tv.tv_sec = timeout->tv_sec;
 537    tv.tv_usec = timeout->tv_nsec/1000;
 538
 539    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 540    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 541    sigprocmask(SIG_SETMASK, &origmask, 0);
 542    return retval;
 543 }
 544 /*}}}*/
 545
 546 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 547 // ---------------------------------------------------------------------
 548 /* This globs the operations and calls dpkg
 549  *
 550  * If it is called with "OutStatusFd" set to a valid file descriptor
 551  * apt will report the install progress over this fd. It maps the
 552  * dpkg states a package goes through to human readable (and i10n-able)
 553  * names and calculates a percentage for each step.
 554 */
 555 bool pkgDPkgPM::Go(int OutStatusFd)
 556 {
 557    unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 558    unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 559
 560    if (RunScripts("DPkg::Pre-Invoke") == false)
 561       return false;
 562
 563    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 564       return false;
 565
 566    // map the dpkg states to the operations that are performed
 567    // (this is sorted in the same way as Item::Ops)
 568    static const struct DpkgState DpkgStatesOpMap[][7] = {
 569       // Install operation
 570       {
 571          {"half-installed", N_("Preparing %s")},
 572          {"unpacked", N_("Unpacking %s") },
 573          {NULL, NULL}
 574       },
 575       // Configure operation
 576       {
 577          {"unpacked",N_("Preparing to configure %s") },
 578          {"half-configured", N_("Configuring %s") },
 579 #if 0
 580          {"triggers-awaited", N_("Processing triggers for %s") },
 581          {"triggers-pending", N_("Processing triggers for %s") },
 582 #endif
 583          { "installed", N_("Installed %s")},
 584          {NULL, NULL}
 585       },
 586       // Remove operation
 587       {
 588          {"half-configured", N_("Preparing for removal of %s")},
 589 #if 0
 590          {"triggers-awaited", N_("Preparing for removal of %s")},
 591          {"triggers-pending", N_("Preparing for removal of %s")},
 592 #endif
 593          {"half-installed", N_("Removing %s")},
 594          {"config-files",  N_("Removed %s")},
 595          {NULL, NULL}
 596       },
 597       // Purge operation
 598       {
 599          {"config-files", N_("Preparing to completely remove %s")},
 600          {"not-installed", N_("Completely removed %s")},
 601          {NULL, NULL}
 602       },
 603    };
 604
 605    // populate the "processing" map
 606    PackageProcessingOps.insert( make_pair("install",N_("Installing %s")) );
 607    PackageProcessingOps.insert( make_pair("configure",N_("Configuring %s")) );
 608    PackageProcessingOps.insert( make_pair("remove",N_("Removing %s")) );
 609    PackageProcessingOps.insert( make_pair("trigproc",N_("Triggering %s")) );
 610
 611    // init the PackageOps map, go over the list of packages that
 612    // that will be [installed|configured|removed|purged] and add
 613    // them to the PackageOps map (the dpkg states it goes through)
 614    // and the PackageOpsTranslations (human readable strings)
 615    for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
 616    {
 617       string name = (*I).Pkg.Name();
 618       PackageOpsDone[name] = 0;
 619       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 620       {
 621          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 622          PackagesTotal++;
 623       }
 624    }
 625
 626    stdin_is_dev_null = false;
 627
 628    // create log
 629    OpenLog();
 630
 631    // this loop is runs once per operation
 632    for (vector<Item>::iterator I = List.begin(); I != List.end();)
 633    {
 634       vector<Item>::iterator J = I;
 635       for (; J != List.end() && J->Op == I->Op; J++);
 636
 637       // Generate the argument list
 638       const char *Args[MaxArgs + 50];
 639       if (J - I > (signed)MaxArgs)
 640          J = I + MaxArgs;
 641
 642       unsigned int n = 0;
 643       unsigned long Size = 0;
 644       string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 645       Args[n++] = Tmp.c_str();
 646       Size += strlen(Args[n-1]);
 647
 648       // Stick in any custom dpkg options
 649       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 650       if (Opts != 0)
 651       {
 652          Opts = Opts->Child;
 653          for (; Opts != 0; Opts = Opts->Next)
 654          {
 655             if (Opts->Value.empty() == true)
 656                continue;
 657             Args[n++] = Opts->Value.c_str();
 658             Size += Opts->Value.length();
 659          }
 660       }
 661
 662       char status_fd_buf[20];
 663       int fd[2];
 664       pipe(fd);
 665
 666       Args[n++] = "--status-fd";
 667       Size += strlen(Args[n-1]);
 668       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 669       Args[n++] = status_fd_buf;
 670       Size += strlen(Args[n-1]);
 671
 672       switch (I->Op)
 673       {
 674          case Item::Remove:
 675          Args[n++] = "--force-depends";
 676          Size += strlen(Args[n-1]);
 677          Args[n++] = "--force-remove-essential";
 678          Size += strlen(Args[n-1]);
 679          Args[n++] = "--remove";
 680          Size += strlen(Args[n-1]);
 681          break;
 682
 683          case Item::Purge:
 684          Args[n++] = "--force-depends";
 685          Size += strlen(Args[n-1]);
 686          Args[n++] = "--force-remove-essential";
 687          Size += strlen(Args[n-1]);
 688          Args[n++] = "--purge";
 689          Size += strlen(Args[n-1]);
 690          break;
 691
 692          case Item::Configure:
 693          Args[n++] = "--configure";
 694          Size += strlen(Args[n-1]);
 695          break;
 696
 697          case Item::Install:
 698          Args[n++] = "--unpack";
 699          Size += strlen(Args[n-1]);
 700          Args[n++] = "--auto-deconfigure";
 701          Size += strlen(Args[n-1]);
 702          break;
 703       }
 704
 705       // Write in the file or package names
 706       if (I->Op == Item::Install)
 707       {
 708          for (;I != J && Size < MaxArgBytes; I++)
 709          {
 710             if (I->File[0] != '/')
 711                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
 712             Args[n++] = I->File.c_str();
 713             Size += strlen(Args[n-1]);
 714          }
 715       }
 716       else
 717       {
 718          for (;I != J && Size < MaxArgBytes; I++)
 719          {
 720             Args[n++] = I->Pkg.Name();
 721             Size += strlen(Args[n-1]);
 722          }
 723       }
 724       Args[n] = 0;
 725       J = I;
 726
 727       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
 728       {
 729          for (unsigned int k = 0; k != n; k++)
 730             clog << Args[k] << ' ';
 731          clog << endl;
 732          continue;
 733       }
 734
 735       cout << flush;
 736       clog << flush;
 737       cerr << flush;
 738
 739       /* Mask off sig int/quit. We do this because dpkg also does when
 740          it forks scripts. What happens is that when you hit ctrl-c it sends
 741          it to all processes in the group. Since dpkg ignores the signal
 742          it doesn't die but we do! So we must also ignore it */
 743       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
 744       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 745
 746       struct    termios tt;
 747       struct    termios tt_out;
 748       struct    winsize win;
 749       int       master;
 750       int       slave;
 751
 752       // FIXME: setup sensible signal handling (*ick*)
 753       tcgetattr(0, &tt);
 754       tcgetattr(1, &tt_out);
 755       ioctl(0, TIOCGWINSZ, (char *)&win);
 756       if (openpty(&master, &slave, NULL, &tt_out, &win) < 0)
 757       {
 758          const char *s = _("Can not write log, openpty() "
 759                            "failed (/dev/pts not mounted?)\n");
 760          fprintf(stderr, "%s",s);
 761          fprintf(term_out, "%s",s);
 762          master = slave = -1;
 763       }  else {
 764          struct termios rtt;
 765          rtt = tt;
 766          cfmakeraw(&rtt);
 767          rtt.c_lflag &= ~ECHO;
 768          tcsetattr(0, TCSAFLUSH, &rtt);
 769       }
 770
 771        // Fork dpkg
 772       pid_t Child;
 773       _config->Set("APT::Keep-Fds::",fd[1]);
 774       Child = ExecFork();
 775
 776       // This is the child
 777       if (Child == 0)
 778       {
 779          if(slave >= 0 && master >= 0)
 780          {
 781             setsid();
 782             ioctl(slave, TIOCSCTTY, 0);
 783             close(master);
 784             dup2(slave, 0);
 785             dup2(slave, 1);
 786             dup2(slave, 2);
 787             close(slave);
 788          }
 789          close(fd[0]); // close the read end of the pipe
 790
 791          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
 792             _exit(100);
 793
 794          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
 795          {
 796             int Flags,dummy;
 797             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
 798                _exit(100);
 799
 800             // Discard everything in stdin before forking dpkg
 801             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
 802                _exit(100);
 803
 804             while (read(STDIN_FILENO,&dummy,1) == 1);
 805
 806             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
 807                _exit(100);
 808          }
 809
 810
 811          /* No Job Control Stop Env is a magic dpkg var that prevents it
 812             from using sigstop */
 813          putenv((char *)"DPKG_NO_TSTP=yes");
 814          execvp(Args[0],(char **)Args);
 815          cerr << "Could not exec dpkg!" << endl;
 816          _exit(100);
 817       }
 818
 819       // clear the Keep-Fd again
 820       _config->Clear("APT::Keep-Fds",fd[1]);
 821
 822       // Wait for dpkg
 823       int Status = 0;
 824
 825       // we read from dpkg here
 826       int _dpkgin = fd[0];
 827       close(fd[1]);                        // close the write end of the pipe
 828
 829       // the result of the waitpid call
 830       int res;
 831       if(slave > 0)
 832          close(slave);
 833
 834       // setups fds
 835       fd_set rfds;
 836       struct timespec tv;
 837       sigset_t sigmask;
 838       sigset_t original_sigmask;
 839       sigemptyset(&sigmask);
 840       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
 841
 842       int select_ret;
 843       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
 844          if(res < 0) {
 845             // FIXME: move this to a function or something, looks ugly here
 846             // error handling, waitpid returned -1
 847             if (errno == EINTR)
 848                continue;
 849             RunScripts("DPkg::Post-Invoke");
 850
 851             // Restore sig int/quit
 852             signal(SIGQUIT,old_SIGQUIT);
 853             signal(SIGINT,old_SIGINT);
 854             return _error->Errno("waitpid","Couldn't wait for subprocess");
 855          }
 856          // wait for input or output here
 857          FD_ZERO(&rfds);
 858          if (!stdin_is_dev_null)
 859             FD_SET(0, &rfds);
 860          FD_SET(_dpkgin, &rfds);
 861          if(master >= 0)
 862             FD_SET(master, &rfds);
 863          tv.tv_sec = 1;
 864          tv.tv_nsec = 0;
 865          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
 866                               &tv, &original_sigmask);
 867          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
 868             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
 869                                       NULL, &tv, &original_sigmask);
 870          if (select_ret == 0)
 871             continue;
 872          else if (select_ret < 0 && errno == EINTR)
 873             continue;
 874          else if (select_ret < 0)
 875          {
 876             perror("select() returned error");
 877             continue;
 878          }
 879
 880          if(master >= 0 && FD_ISSET(master, &rfds))
 881             DoTerminalPty(master);
 882          if(master >= 0 && FD_ISSET(0, &rfds))
 883             DoStdin(master);
 884          if(FD_ISSET(_dpkgin, &rfds))
 885             DoDpkgStatusFd(_dpkgin, OutStatusFd);
 886       }
 887       close(_dpkgin);
 888
 889       // Restore sig int/quit
 890       signal(SIGQUIT,old_SIGQUIT);
 891       signal(SIGINT,old_SIGINT);
 892
 893       if(master >= 0)
 894       {
 895          tcsetattr(0, TCSAFLUSH, &tt);
 896          close(master);
 897       }
 898
 899       // Check for an error code.
 900       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
 901       {
 902          // if it was set to "keep-dpkg-runing" then we won't return
 903          // here but keep the loop going and just report it as a error
 904          // for later
 905          bool stopOnError = _config->FindB("Dpkg::StopOnError",true);
 906
 907          if(stopOnError)
 908             RunScripts("DPkg::Post-Invoke");
 909
 910          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
 911             _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
 912          else if (WIFEXITED(Status) != 0)
 913             _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
 914          else
 915             _error->Error("Sub-process %s exited unexpectedly",Args[0]);
 916
 917          if(stopOnError)
 918          {
 919             CloseLog();
 920             return false;
 921          }
 922       }
 923    }
 924    CloseLog();
 925
 926    if (RunScripts("DPkg::Post-Invoke") == false)
 927       return false;
 928    return true;
 929 }
 930                                                                         /*}}}*/
 931 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
 932 // ---------------------------------------------------------------------
 933 /* */
 934 void pkgDPkgPM::Reset()
 935 {
 936    List.erase(List.begin(),List.end());
 937 }
 938                                                                         /*}}}*/
 939 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
 940 // ---------------------------------------------------------------------
 941 /* */
 942 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
 943 {
 944    string pkgname, reportfile, srcpkgname, pkgver, arch;
 945    string::size_type pos;
 946    FILE *report;
 947
 948    if (_config->FindB("Dpkg::ApportFailureReport",true) == false)
 949    {
 950       std::clog << "configured to not write apport reports" << std::endl;
 951       return;
 952    }
 953
 954    // only report the first error
 955    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
 956    {
 957       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
 958       return;
 959    }
 960
 961    // get the pkgname and reportfile
 962    pkgname = flNotDir(pkgpath);
 963    pos = pkgname.find('_');
 964    if(pos != string::npos)
 965       pkgname = pkgname.substr(0, pos);
 966
 967    // find the package versin and source package name
 968    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 969    if (Pkg.end() == true)
 970       return;
 971    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
 972    if (Ver.end() == true)
 973       return;
 974    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
 975    pkgRecords Recs(Cache);
 976    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
 977    srcpkgname = Parse.SourcePkg();
 978    if(srcpkgname.empty())
 979       srcpkgname = pkgname;
 980
 981    // if the file exists already, we check:
 982    // - if it was reported already (touched by apport).
 983    //   If not, we do nothing, otherwise
 984    //    we overwrite it. This is the same behaviour as apport
 985    // - if we have a report with the same pkgversion already
 986    //   then we skip it
 987    reportfile = flCombine("/var/crash",pkgname+".0.crash");
 988    if(FileExists(reportfile))
 989    {
 990       struct stat buf;
 991       char strbuf[255];
 992
 993       // check atime/mtime
 994       stat(reportfile.c_str(), &buf);
 995       if(buf.st_mtime > buf.st_atime)
 996          return;
 997
 998       // check if the existing report is the same version
 999       report = fopen(reportfile.c_str(),"r");
1000       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1001       {
1002          if(strstr(strbuf,"Package:") == strbuf)
1003          {
1004             char pkgname[255], version[255];
1005             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
1006                if(strcmp(pkgver.c_str(), version) == 0)
1007                {
1008                   fclose(report);
1009                   return;
1010                }
1011          }
1012       }
1013       fclose(report);
1014    }
1015
1016    // now write the report
1017    arch = _config->Find("APT::Architecture");
1018    report = fopen(reportfile.c_str(),"w");
1019    if(report == NULL)
1020       return;
1021    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1022       chmod(reportfile.c_str(), 0);
1023    else
1024       chmod(reportfile.c_str(), 0600);
1025    fprintf(report, "ProblemType: Package\n");
1026    fprintf(report, "Architecture: %s\n", arch.c_str());
1027    time_t now = time(NULL);
1028    fprintf(report, "Date: %s" , ctime(&now));
1029    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1030    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1031    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1032
1033    // ensure that the log is flushed
1034    if(term_out)
1035       fflush(term_out);
1036
1037    // attach terminal log it if we have it
1038    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1039    if (!logfile_name.empty())
1040    {
1041       FILE *log = NULL;
1042       char buf[1024];
1043
1044       fprintf(report, "DpkgTerminalLog:\n");
1045       log = fopen(logfile_name.c_str(),"r");
1046       if(log != NULL)
1047       {
1048          while( fgets(buf, sizeof(buf), log) != NULL)
1049             fprintf(report, " %s", buf);
1050          fclose(log);
1051       }
1052    }
1053    fclose(report);
1054 }
1055                                                                         /*}}}*/