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)
  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    */
 338    char* list[5];
 339    //        dpkg sends multiline error messages sometimes (see
 340    //        #374195 for a example. we should support this by
 341    //        either patching dpkg to not send multiline over the
 342    //        statusfd or by rewriting the code here to deal with
 343    //        it. for now we just ignore it and not crash
 344    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 345    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 346    {
 347       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 348          std::clog << "ignoring line: not enough ':'" << std::endl;
 349       return;
 350    }
 351    char *pkg = list[1];
 352    char *action = _strstrip(list[2]);
 353
 354    if(strncmp(action,"error",strlen("error")) == 0)
 355    {
 356       status << "pmerror:" << list[1]
 357              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 358              << ":" << list[3]
 359              << endl;
 360       if(OutStatusFd > 0)
 361          write(OutStatusFd, status.str().c_str(), status.str().size());
 362       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 363          std::clog << "send: '" << status.str() << "'" << endl;
 364       pkgFailures++;
 365       WriteApportReport(list[1], list[3]);
 366       return;
 367    }
 368    if(strncmp(action,"conffile",strlen("conffile")) == 0)
 369    {
 370       status << "pmconffile:" << list[1]
 371              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 372              << ":" << list[3]
 373              << endl;
 374       if(OutStatusFd > 0)
 375          write(OutStatusFd, status.str().c_str(), status.str().size());
 376       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 377          std::clog << "send: '" << status.str() << "'" << endl;
 378       return;
 379    }
 380
 381    vector<struct DpkgState> &states = PackageOps[pkg];
 382    const char *next_action = NULL;
 383    if(PackageOpsDone[pkg] < states.size())
 384       next_action = states[PackageOpsDone[pkg]].state;
 385    // check if the package moved to the next dpkg state
 386    if(next_action && (strcmp(action, next_action) == 0))
 387    {
 388       // only read the translation if there is actually a next
 389       // action
 390       const char *translation = _(states[PackageOpsDone[pkg]].str);
 391       char s[200];
 392       snprintf(s, sizeof(s), translation, pkg);
 393
 394       // we moved from one dpkg state to a new one, report that
 395       PackageOpsDone[pkg]++;
 396       PackagesDone++;
 397       // build the status str
 398       status << "pmstatus:" << pkg
 399              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 400              << ":" << s
 401              << endl;
 402       if(OutStatusFd > 0)
 403          write(OutStatusFd, status.str().c_str(), status.str().size());
 404       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 405          std::clog << "send: '" << status.str() << "'" << endl;
 406    }
 407    if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 408       std::clog << "(parsed from dpkg) pkg: " << pkg
 409                 << " action: " << action << endl;
 410 }
 411
 412 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 413 // ---------------------------------------------------------------------
 414 /*
 415  */
 416 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 417 {
 418    char *p, *q;
 419    int len;
 420
 421    len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
 422    dpkgbuf_pos += len;
 423    if(len <= 0)
 424       return;
 425
 426    // process line by line if we have a buffer
 427    p = q = dpkgbuf;
 428    while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
 429    {
 430       *q = 0;
 431       ProcessDpkgStatusLine(OutStatusFd, p);
 432       p=q+1; // continue with next line
 433    }
 434
 435    // now move the unprocessed bits (after the final \n that is now a 0x0)
 436    // to the start and update dpkgbuf_pos
 437    p = (char*)memrchr(dpkgbuf, 0, dpkgbuf_pos);
 438    if(p == NULL)
 439       return;
 440
 441    // we are interessted in the first char *after* 0x0
 442    p++;
 443
 444    // move the unprocessed tail to the start and update pos
 445    memmove(dpkgbuf, p, p-dpkgbuf);
 446    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 447 }
 448                                                                         /*}}}*/
 449
 450 bool pkgDPkgPM::OpenLog()
 451 {
 452    string logdir = _config->FindDir("Dir::Log");
 453    if(not FileExists(logdir))
 454       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 455    string logfile_name = flCombine(logdir,
 456                                    _config->Find("Dir::Log::Terminal"));
 457    if (!logfile_name.empty())
 458    {
 459       term_out = fopen(logfile_name.c_str(),"a");
 460       chmod(logfile_name.c_str(), 0600);
 461       // output current time
 462       char outstr[200];
 463       time_t t = time(NULL);
 464       struct tm *tmp = localtime(&t);
 465       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 466       fprintf(term_out, "\nLog started: ");
 467       fprintf(term_out, outstr);
 468       fprintf(term_out, "\n");
 469    }
 470    return true;
 471 }
 472
 473 bool pkgDPkgPM::CloseLog()
 474 {
 475    if(term_out)
 476    {
 477       char outstr[200];
 478       time_t t = time(NULL);
 479       struct tm *tmp = localtime(&t);
 480       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 481       fprintf(term_out, "Log ended: ");
 482       fprintf(term_out, outstr);
 483       fprintf(term_out, "\n");
 484       fclose(term_out);
 485    }
 486    term_out = NULL;
 487    return true;
 488 }
 489
 490 /*{{{*/
 491 // This implements a racy version of pselect for those architectures
 492 // that don't have a working implementation.
 493 // FIXME: Probably can be removed on Lenny+1
 494 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 495    fd_set *exceptfds, const struct timespec *timeout,
 496    const sigset_t *sigmask)
 497 {
 498    sigset_t origmask;
 499    struct timeval tv;
 500    int retval;
 501
 502    tv.tv_sec = timeout->tv_sec;
 503    tv.tv_usec = timeout->tv_nsec/1000;
 504
 505    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 506    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 507    sigprocmask(SIG_SETMASK, &origmask, 0);
 508    return retval;
 509 }
 510 /*}}}*/
 511
 512 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 513 // ---------------------------------------------------------------------
 514 /* This globs the operations and calls dpkg
 515  *
 516  * If it is called with "OutStatusFd" set to a valid file descriptor
 517  * apt will report the install progress over this fd. It maps the
 518  * dpkg states a package goes through to human readable (and i10n-able)
 519  * names and calculates a percentage for each step.
 520 */
 521 bool pkgDPkgPM::Go(int OutStatusFd)
 522 {
 523    unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 524    unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 525
 526    if (RunScripts("DPkg::Pre-Invoke") == false)
 527       return false;
 528
 529    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 530       return false;
 531
 532    // map the dpkg states to the operations that are performed
 533    // (this is sorted in the same way as Item::Ops)
 534    static const struct DpkgState DpkgStatesOpMap[][7] = {
 535       // Install operation
 536       {
 537          {"half-installed", N_("Preparing %s")},
 538          {"unpacked", N_("Unpacking %s") },
 539          {NULL, NULL}
 540       },
 541       // Configure operation
 542       {
 543          {"unpacked",N_("Preparing to configure %s") },
 544          {"half-configured", N_("Configuring %s") },
 545 #if 0
 546          {"triggers-awaited", N_("Processing triggers for %s") },
 547          {"triggers-pending", N_("Processing triggers for %s") },
 548 #endif
 549          { "installed", N_("Installed %s")},
 550          {NULL, NULL}
 551       },
 552       // Remove operation
 553       {
 554          {"half-configured", N_("Preparing for removal of %s")},
 555 #if 0
 556          {"triggers-awaited", N_("Preparing for removal of %s")},
 557          {"triggers-pending", N_("Preparing for removal of %s")},
 558 #endif
 559          {"half-installed", N_("Removing %s")},
 560          {"config-files",  N_("Removed %s")},
 561          {NULL, NULL}
 562       },
 563       // Purge operation
 564       {
 565          {"config-files", N_("Preparing to completely remove %s")},
 566          {"not-installed", N_("Completely removed %s")},
 567          {NULL, NULL}
 568       },
 569    };
 570
 571    // init the PackageOps map, go over the list of packages that
 572    // that will be [installed|configured|removed|purged] and add
 573    // them to the PackageOps map (the dpkg states it goes through)
 574    // and the PackageOpsTranslations (human readable strings)
 575    for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
 576    {
 577       string name = (*I).Pkg.Name();
 578       PackageOpsDone[name] = 0;
 579       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 580       {
 581          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 582          PackagesTotal++;
 583       }
 584    }
 585
 586    stdin_is_dev_null = false;
 587
 588    // create log
 589    OpenLog();
 590
 591    // this loop is runs once per operation
 592    for (vector<Item>::iterator I = List.begin(); I != List.end();)
 593    {
 594       vector<Item>::iterator J = I;
 595       for (; J != List.end() && J->Op == I->Op; J++);
 596
 597       // Generate the argument list
 598       const char *Args[MaxArgs + 50];
 599       if (J - I > (signed)MaxArgs)
 600          J = I + MaxArgs;
 601
 602       unsigned int n = 0;
 603       unsigned long Size = 0;
 604       string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 605       Args[n++] = Tmp.c_str();
 606       Size += strlen(Args[n-1]);
 607
 608       // Stick in any custom dpkg options
 609       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 610       if (Opts != 0)
 611       {
 612          Opts = Opts->Child;
 613          for (; Opts != 0; Opts = Opts->Next)
 614          {
 615             if (Opts->Value.empty() == true)
 616                continue;
 617             Args[n++] = Opts->Value.c_str();
 618             Size += Opts->Value.length();
 619          }
 620       }
 621
 622       char status_fd_buf[20];
 623       int fd[2];
 624       pipe(fd);
 625
 626       Args[n++] = "--status-fd";
 627       Size += strlen(Args[n-1]);
 628       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 629       Args[n++] = status_fd_buf;
 630       Size += strlen(Args[n-1]);
 631
 632       switch (I->Op)
 633       {
 634          case Item::Remove:
 635          Args[n++] = "--force-depends";
 636          Size += strlen(Args[n-1]);
 637          Args[n++] = "--force-remove-essential";
 638          Size += strlen(Args[n-1]);
 639          Args[n++] = "--remove";
 640          Size += strlen(Args[n-1]);
 641          break;
 642
 643          case Item::Purge:
 644          Args[n++] = "--force-depends";
 645          Size += strlen(Args[n-1]);
 646          Args[n++] = "--force-remove-essential";
 647          Size += strlen(Args[n-1]);
 648          Args[n++] = "--purge";
 649          Size += strlen(Args[n-1]);
 650          break;
 651
 652          case Item::Configure:
 653          Args[n++] = "--configure";
 654          Size += strlen(Args[n-1]);
 655          break;
 656
 657          case Item::Install:
 658          Args[n++] = "--unpack";
 659          Size += strlen(Args[n-1]);
 660          Args[n++] = "--auto-deconfigure";
 661          Size += strlen(Args[n-1]);
 662          break;
 663       }
 664
 665       // Write in the file or package names
 666       if (I->Op == Item::Install)
 667       {
 668          for (;I != J && Size < MaxArgBytes; I++)
 669          {
 670             if (I->File[0] != '/')
 671                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
 672             Args[n++] = I->File.c_str();
 673             Size += strlen(Args[n-1]);
 674          }
 675       }
 676       else
 677       {
 678          for (;I != J && Size < MaxArgBytes; I++)
 679          {
 680             Args[n++] = I->Pkg.Name();
 681             Size += strlen(Args[n-1]);
 682          }
 683       }
 684       Args[n] = 0;
 685       J = I;
 686
 687       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
 688       {
 689          for (unsigned int k = 0; k != n; k++)
 690             clog << Args[k] << ' ';
 691          clog << endl;
 692          continue;
 693       }
 694
 695       cout << flush;
 696       clog << flush;
 697       cerr << flush;
 698
 699       /* Mask off sig int/quit. We do this because dpkg also does when
 700          it forks scripts. What happens is that when you hit ctrl-c it sends
 701          it to all processes in the group. Since dpkg ignores the signal
 702          it doesn't die but we do! So we must also ignore it */
 703       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
 704       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 705
 706       struct    termios tt;
 707       struct    termios tt_out;
 708       struct    winsize win;
 709       int       master;
 710       int       slave;
 711
 712       // FIXME: setup sensible signal handling (*ick*)
 713       tcgetattr(0, &tt);
 714       tcgetattr(1, &tt_out);
 715       ioctl(0, TIOCGWINSZ, (char *)&win);
 716       if (openpty(&master, &slave, NULL, &tt_out, &win) < 0)
 717       {
 718          const char *s = _("Can not write log, openpty() "
 719                            "failed (/dev/pts not mounted?)\n");
 720          fprintf(stderr, "%s",s);
 721          fprintf(term_out, "%s",s);
 722          master = slave = -1;
 723       }  else {
 724          struct termios rtt;
 725          rtt = tt;
 726          cfmakeraw(&rtt);
 727          rtt.c_lflag &= ~ECHO;
 728          tcsetattr(0, TCSAFLUSH, &rtt);
 729       }
 730
 731        // Fork dpkg
 732       pid_t Child;
 733       _config->Set("APT::Keep-Fds::",fd[1]);
 734       Child = ExecFork();
 735
 736       // This is the child
 737       if (Child == 0)
 738       {
 739          if(slave >= 0 && master >= 0)
 740          {
 741             setsid();
 742             ioctl(slave, TIOCSCTTY, 0);
 743             close(master);
 744             dup2(slave, 0);
 745             dup2(slave, 1);
 746             dup2(slave, 2);
 747             close(slave);
 748          }
 749          close(fd[0]); // close the read end of the pipe
 750
 751          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
 752             _exit(100);
 753
 754          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
 755          {
 756             int Flags,dummy;
 757             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
 758                _exit(100);
 759
 760             // Discard everything in stdin before forking dpkg
 761             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
 762                _exit(100);
 763
 764             while (read(STDIN_FILENO,&dummy,1) == 1);
 765
 766             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
 767                _exit(100);
 768          }
 769
 770
 771          /* No Job Control Stop Env is a magic dpkg var that prevents it
 772             from using sigstop */
 773          putenv((char *)"DPKG_NO_TSTP=yes");
 774          execvp(Args[0],(char **)Args);
 775          cerr << "Could not exec dpkg!" << endl;
 776          _exit(100);
 777       }
 778
 779       // clear the Keep-Fd again
 780       _config->Clear("APT::Keep-Fds",fd[1]);
 781
 782       // Wait for dpkg
 783       int Status = 0;
 784
 785       // we read from dpkg here
 786       int _dpkgin = fd[0];
 787       close(fd[1]);                        // close the write end of the pipe
 788
 789       // the result of the waitpid call
 790       int res;
 791       if(slave > 0)
 792          close(slave);
 793
 794       // setups fds
 795       fd_set rfds;
 796       struct timespec tv;
 797       sigset_t sigmask;
 798       sigset_t original_sigmask;
 799       sigemptyset(&sigmask);
 800       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
 801
 802       int select_ret;
 803       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
 804          if(res < 0) {
 805             // FIXME: move this to a function or something, looks ugly here
 806             // error handling, waitpid returned -1
 807             if (errno == EINTR)
 808                continue;
 809             RunScripts("DPkg::Post-Invoke");
 810
 811             // Restore sig int/quit
 812             signal(SIGQUIT,old_SIGQUIT);
 813             signal(SIGINT,old_SIGINT);
 814             return _error->Errno("waitpid","Couldn't wait for subprocess");
 815          }
 816          // wait for input or output here
 817          FD_ZERO(&rfds);
 818          if (!stdin_is_dev_null)
 819             FD_SET(0, &rfds);
 820          FD_SET(_dpkgin, &rfds);
 821          if(master >= 0)
 822             FD_SET(master, &rfds);
 823          tv.tv_sec = 1;
 824          tv.tv_nsec = 0;
 825          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
 826                               &tv, &original_sigmask);
 827          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
 828             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
 829                                       NULL, &tv, &original_sigmask);
 830          if (select_ret == 0)
 831             continue;
 832          else if (select_ret < 0 && errno == EINTR)
 833             continue;
 834          else if (select_ret < 0)
 835          {
 836             perror("select() returned error");
 837             continue;
 838          }
 839
 840          if(master >= 0 && FD_ISSET(master, &rfds))
 841             DoTerminalPty(master);
 842          if(master >= 0 && FD_ISSET(0, &rfds))
 843             DoStdin(master);
 844          if(FD_ISSET(_dpkgin, &rfds))
 845             DoDpkgStatusFd(_dpkgin, OutStatusFd);
 846       }
 847       close(_dpkgin);
 848
 849       // Restore sig int/quit
 850       signal(SIGQUIT,old_SIGQUIT);
 851       signal(SIGINT,old_SIGINT);
 852
 853       if(master >= 0)
 854       {
 855          tcsetattr(0, TCSAFLUSH, &tt);
 856          close(master);
 857       }
 858
 859       // Check for an error code.
 860       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
 861       {
 862          // if it was set to "keep-dpkg-runing" then we won't return
 863          // here but keep the loop going and just report it as a error
 864          // for later
 865          bool stopOnError = _config->FindB("Dpkg::StopOnError",true);
 866
 867          if(stopOnError)
 868             RunScripts("DPkg::Post-Invoke");
 869
 870          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
 871             _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
 872          else if (WIFEXITED(Status) != 0)
 873             _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
 874          else
 875             _error->Error("Sub-process %s exited unexpectedly",Args[0]);
 876
 877          if(stopOnError)
 878          {
 879             CloseLog();
 880             return false;
 881          }
 882       }
 883    }
 884    CloseLog();
 885
 886    if (RunScripts("DPkg::Post-Invoke") == false)
 887       return false;
 888    return true;
 889 }
 890                                                                         /*}}}*/
 891 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
 892 // ---------------------------------------------------------------------
 893 /* */
 894 void pkgDPkgPM::Reset()
 895 {
 896    List.erase(List.begin(),List.end());
 897 }
 898                                                                         /*}}}*/
 899 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
 900 // ---------------------------------------------------------------------
 901 /* */
 902 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
 903 {
 904    string pkgname, reportfile, srcpkgname, pkgver, arch;
 905    string::size_type pos;
 906    FILE *report;
 907
 908    if (_config->FindB("Dpkg::ApportFailureReport",true) == false)
 909       return;
 910
 911    // only report the first error
 912    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
 913       return;
 914
 915    // get the pkgname and reportfile
 916    pkgname = flNotDir(pkgpath);
 917    pos = pkgname.find('_');
 918    if(pos != string::npos)
 919       pkgname = pkgname.substr(0, pos);
 920
 921    // find the package versin and source package name
 922    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 923    if (Pkg.end() == true)
 924       return;
 925    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
 926    if (Ver.end() == true)
 927       return;
 928    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
 929    pkgRecords Recs(Cache);
 930    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
 931    srcpkgname = Parse.SourcePkg();
 932    if(srcpkgname.empty())
 933       srcpkgname = pkgname;
 934
 935    // if the file exists already, we check:
 936    // - if it was reported already (touched by apport).
 937    //   If not, we do nothing, otherwise
 938    //    we overwrite it. This is the same behaviour as apport
 939    // - if we have a report with the same pkgversion already
 940    //   then we skip it
 941    reportfile = flCombine("/var/crash",pkgname+".0.crash");
 942    if(FileExists(reportfile))
 943    {
 944       struct stat buf;
 945       char strbuf[255];
 946
 947       // check atime/mtime
 948       stat(reportfile.c_str(), &buf);
 949       if(buf.st_mtime > buf.st_atime)
 950          return;
 951
 952       // check if the existing report is the same version
 953       report = fopen(reportfile.c_str(),"r");
 954       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
 955       {
 956          if(strstr(strbuf,"Package:") == strbuf)
 957          {
 958             char pkgname[255], version[255];
 959             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
 960                if(strcmp(pkgver.c_str(), version) == 0)
 961                {
 962                   fclose(report);
 963                   return;
 964                }
 965          }
 966       }
 967       fclose(report);
 968    }
 969
 970    // now write the report
 971    arch = _config->Find("APT::Architecture");
 972    report = fopen(reportfile.c_str(),"w");
 973    if(report == NULL)
 974       return;
 975    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
 976       chmod(reportfile.c_str(), 0);
 977    else
 978       chmod(reportfile.c_str(), 0600);
 979    fprintf(report, "ProblemType: Package\n");
 980    fprintf(report, "Architecture: %s\n", arch.c_str());
 981    time_t now = time(NULL);
 982    fprintf(report, "Date: %s" , ctime(&now));
 983    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
 984    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
 985    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
 986
 987    // ensure that the log is flushed
 988    if(term_out)
 989       fflush(term_out);
 990
 991    // attach terminal log it if we have it
 992    string logfile_name = _config->FindFile("Dir::Log::Terminal");
 993    if (!logfile_name.empty())
 994    {
 995       FILE *log = NULL;
 996       char buf[1024];
 997
 998       fprintf(report, "DpkgTerminalLog:\n");
 999       log = fopen(logfile_name.c_str(),"r");
1000       if(log != NULL)
1001       {
1002          while( fgets(buf, sizeof(buf), log) != NULL)
1003             fprintf(report, " %s", buf);
1004          fclose(log);
1005       }
1006    }
1007    fclose(report);
1008 }
1009                                                                         /*}}}*/