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