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 == -1 && errno == EIO)
 362    {
 363       // this happens when the child is about to exit, we
 364       // give it time to actually exit, otherwise we run
 365       // into a race
 366       usleep(500000);
 367       return;
 368    }
 369    if(len <= 0)
 370       return;
 371    write(1, term_buf, len);
 372    if(term_out)
 373       fwrite(term_buf, len, sizeof(char), term_out);
 374 }
 375                                                                         /*}}}*/
 376 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 377 // ---------------------------------------------------------------------
 378 /*
 379  */
 380 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 381 {
 382    // the status we output
 383    ostringstream status;
 384
 385    if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 386       std::clog << "got from dpkg '" << line << "'" << std::endl;
 387
 388
 389    /* dpkg sends strings like this:
 390       'status:   <pkg>:  <pkg  qstate>'
 391       errors look like this:
 392       '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
 393       and conffile-prompt like this
 394       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 395
 396    */
 397    char* list[5];
 398    //        dpkg sends multiline error messages sometimes (see
 399    //        #374195 for a example. we should support this by
 400    //        either patching dpkg to not send multiline over the
 401    //        statusfd or by rewriting the code here to deal with
 402    //        it. for now we just ignore it and not crash
 403    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 404    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 405    {
 406       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 407          std::clog << "ignoring line: not enough ':'" << std::endl;
 408       return;
 409    }
 410    char *pkg = list[1];
 411    char *action = _strstrip(list[2]);
 412
 413    if(strncmp(action,"error",strlen("error")) == 0)
 414    {
 415       status << "pmerror:" << list[1]
 416              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 417              << ":" << list[3]
 418              << endl;
 419       if(OutStatusFd > 0)
 420          write(OutStatusFd, status.str().c_str(), status.str().size());
 421       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 422          std::clog << "send: '" << status.str() << "'" << endl;
 423       pkgFailures++;
 424       WriteApportReport(list[1], list[3]);
 425       return;
 426    }
 427    if(strncmp(action,"conffile",strlen("conffile")) == 0)
 428    {
 429       status << "pmconffile:" << list[1]
 430              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 431              << ":" << list[3]
 432              << endl;
 433       if(OutStatusFd > 0)
 434          write(OutStatusFd, status.str().c_str(), status.str().size());
 435       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 436          std::clog << "send: '" << status.str() << "'" << endl;
 437       return;
 438    }
 439
 440    vector<struct DpkgState> &states = PackageOps[pkg];
 441    const char *next_action = NULL;
 442    if(PackageOpsDone[pkg] < states.size())
 443       next_action = states[PackageOpsDone[pkg]].state;
 444    // check if the package moved to the next dpkg state
 445    if(next_action && (strcmp(action, next_action) == 0))
 446    {
 447       // only read the translation if there is actually a next
 448       // action
 449       const char *translation = _(states[PackageOpsDone[pkg]].str);
 450       char s[200];
 451       snprintf(s, sizeof(s), translation, pkg);
 452
 453       // we moved from one dpkg state to a new one, report that
 454       PackageOpsDone[pkg]++;
 455       PackagesDone++;
 456       // build the status str
 457       status << "pmstatus:" << pkg
 458              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 459              << ":" << s
 460              << endl;
 461       if(OutStatusFd > 0)
 462          write(OutStatusFd, status.str().c_str(), status.str().size());
 463       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 464          std::clog << "send: '" << status.str() << "'" << endl;
 465    }
 466    if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 467       std::clog << "(parsed from dpkg) pkg: " << pkg
 468                 << " action: " << action << endl;
 469 }
 470
 471 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 472 // ---------------------------------------------------------------------
 473 /*
 474  */
 475 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 476 {
 477    char *p, *q;
 478    int len;
 479
 480    len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
 481    dpkgbuf_pos += len;
 482    if(len <= 0)
 483       return;
 484
 485    // process line by line if we have a buffer
 486    p = q = dpkgbuf;
 487    while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
 488    {
 489       *q = 0;
 490       ProcessDpkgStatusLine(OutStatusFd, p);
 491       p=q+1; // continue with next line
 492    }
 493
 494    // now move the unprocessed bits (after the final \n that is now a 0x0)
 495    // to the start and update dpkgbuf_pos
 496    p = (char*)memrchr(dpkgbuf, 0, dpkgbuf_pos);
 497    if(p == NULL)
 498       return;
 499
 500    // we are interessted in the first char *after* 0x0
 501    p++;
 502
 503    // move the unprocessed tail to the start and update pos
 504    memmove(dpkgbuf, p, p-dpkgbuf);
 505    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 506 }
 507                                                                         /*}}}*/
 508
 509 bool pkgDPkgPM::OpenLog()
 510 {
 511    string logdir = _config->FindDir("Dir::Log");
 512    if(not FileExists(logdir))
 513       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 514    string logfile_name = flCombine(logdir,
 515                                    _config->Find("Dir::Log::Terminal"));
 516    if (!logfile_name.empty())
 517    {
 518       term_out = fopen(logfile_name.c_str(),"a");
 519       chmod(logfile_name.c_str(), 0600);
 520       // output current time
 521       char outstr[200];
 522       time_t t = time(NULL);
 523       struct tm *tmp = localtime(&t);
 524       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 525       fprintf(term_out, "\nLog started: ");
 526       fprintf(term_out, outstr);
 527       fprintf(term_out, "\n");
 528    }
 529    return true;
 530 }
 531
 532 bool pkgDPkgPM::CloseLog()
 533 {
 534    if(term_out)
 535    {
 536       char outstr[200];
 537       time_t t = time(NULL);
 538       struct tm *tmp = localtime(&t);
 539       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 540       fprintf(term_out, "Log ended: ");
 541       fprintf(term_out, outstr);
 542       fprintf(term_out, "\n");
 543       fclose(term_out);
 544    }
 545    term_out = NULL;
 546    return true;
 547 }
 548
 549
 550 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 551 // ---------------------------------------------------------------------
 552 /* This globs the operations and calls dpkg
 553  *
 554  * If it is called with "OutStatusFd" set to a valid file descriptor
 555  * apt will report the install progress over this fd. It maps the
 556  * dpkg states a package goes through to human readable (and i10n-able)
 557  * names and calculates a percentage for each step.
 558 */
 559 bool pkgDPkgPM::Go(int OutStatusFd)
 560 {
 561    unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 562    unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 563
 564    if (RunScripts("DPkg::Pre-Invoke") == false)
 565       return false;
 566
 567    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 568       return false;
 569
 570    // map the dpkg states to the operations that are performed
 571    // (this is sorted in the same way as Item::Ops)
 572    static const struct DpkgState DpkgStatesOpMap[][7] = {
 573       // Install operation
 574       {
 575          {"half-installed", N_("Preparing %s")},
 576          {"unpacked", N_("Unpacking %s") },
 577          {NULL, NULL}
 578       },
 579       // Configure operation
 580       {
 581          {"unpacked",N_("Preparing to configure %s") },
 582          {"half-configured", N_("Configuring %s") },
 583 #if 0
 584          {"triggers-awaited", N_("Processing triggers for %s") },
 585          {"triggers-pending", N_("Processing triggers for %s") },
 586 #endif
 587          { "installed", N_("Installed %s")},
 588          {NULL, NULL}
 589       },
 590       // Remove operation
 591       {
 592          {"half-configured", N_("Preparing for removal of %s")},
 593 #if 0
 594          {"triggers-awaited", N_("Preparing for removal of %s")},
 595          {"triggers-pending", N_("Preparing for removal of %s")},
 596 #endif
 597          {"half-installed", N_("Removing %s")},
 598          {"config-files",  N_("Removed %s")},
 599          {NULL, NULL}
 600       },
 601       // Purge operation
 602       {
 603          {"config-files", N_("Preparing to completely remove %s")},
 604          {"not-installed", N_("Completely removed %s")},
 605          {NULL, NULL}
 606       },
 607    };
 608
 609    // init the PackageOps map, go over the list of packages that
 610    // that will be [installed|configured|removed|purged] and add
 611    // them to the PackageOps map (the dpkg states it goes through)
 612    // and the PackageOpsTranslations (human readable strings)
 613    for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
 614    {
 615       string name = (*I).Pkg.Name();
 616       PackageOpsDone[name] = 0;
 617       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 618       {
 619          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 620          PackagesTotal++;
 621       }
 622    }
 623
 624    // create log
 625    OpenLog();
 626
 627    // this loop is runs once per operation
 628    for (vector<Item>::iterator I = List.begin(); I != List.end();)
 629    {
 630       vector<Item>::iterator J = I;
 631       for (; J != List.end() && J->Op == I->Op; J++);
 632
 633       // Generate the argument list
 634       const char *Args[MaxArgs + 50];
 635       if (J - I > (signed)MaxArgs)
 636          J = I + MaxArgs;
 637
 638       unsigned int n = 0;
 639       unsigned long Size = 0;
 640       string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 641       Args[n++] = Tmp.c_str();
 642       Size += strlen(Args[n-1]);
 643
 644       // Stick in any custom dpkg options
 645       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 646       if (Opts != 0)
 647       {
 648          Opts = Opts->Child;
 649          for (; Opts != 0; Opts = Opts->Next)
 650          {
 651             if (Opts->Value.empty() == true)
 652                continue;
 653             Args[n++] = Opts->Value.c_str();
 654             Size += Opts->Value.length();
 655          }
 656       }
 657
 658       char status_fd_buf[20];
 659       int fd[2];
 660       pipe(fd);
 661
 662       Args[n++] = "--status-fd";
 663       Size += strlen(Args[n-1]);
 664       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 665       Args[n++] = status_fd_buf;
 666       Size += strlen(Args[n-1]);
 667
 668       switch (I->Op)
 669       {
 670          case Item::Remove:
 671          Args[n++] = "--force-depends";
 672          Size += strlen(Args[n-1]);
 673          Args[n++] = "--force-remove-essential";
 674          Size += strlen(Args[n-1]);
 675          Args[n++] = "--remove";
 676          Size += strlen(Args[n-1]);
 677          break;
 678
 679          case Item::Purge:
 680          Args[n++] = "--force-depends";
 681          Size += strlen(Args[n-1]);
 682          Args[n++] = "--force-remove-essential";
 683          Size += strlen(Args[n-1]);
 684          Args[n++] = "--purge";
 685          Size += strlen(Args[n-1]);
 686          break;
 687
 688          case Item::Configure:
 689          Args[n++] = "--configure";
 690          Size += strlen(Args[n-1]);
 691          break;
 692
 693          case Item::Install:
 694          Args[n++] = "--unpack";
 695          Size += strlen(Args[n-1]);
 696          Args[n++] = "--auto-deconfigure";
 697          Size += strlen(Args[n-1]);
 698          break;
 699       }
 700
 701       // Write in the file or package names
 702       if (I->Op == Item::Install)
 703       {
 704          for (;I != J && Size < MaxArgBytes; I++)
 705          {
 706             if (I->File[0] != '/')
 707                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
 708             Args[n++] = I->File.c_str();
 709             Size += strlen(Args[n-1]);
 710          }
 711       }
 712       else
 713       {
 714          for (;I != J && Size < MaxArgBytes; I++)
 715          {
 716             Args[n++] = I->Pkg.Name();
 717             Size += strlen(Args[n-1]);
 718          }
 719       }
 720       Args[n] = 0;
 721       J = I;
 722
 723       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
 724       {
 725          for (unsigned int k = 0; k != n; k++)
 726             clog << Args[k] << ' ';
 727          clog << endl;
 728          continue;
 729       }
 730
 731       cout << flush;
 732       clog << flush;
 733       cerr << flush;
 734
 735       /* Mask off sig int/quit. We do this because dpkg also does when
 736          it forks scripts. What happens is that when you hit ctrl-c it sends
 737          it to all processes in the group. Since dpkg ignores the signal
 738          it doesn't die but we do! So we must also ignore it */
 739       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
 740       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 741
 742       struct    termios tt;
 743       struct    winsize win;
 744       int       master;
 745       int       slave;
 746
 747       // FIXME: setup sensible signal handling (*ick*)
 748       tcgetattr(0, &tt);
 749       ioctl(0, TIOCGWINSZ, (char *)&win);
 750       if (openpty(&master, &slave, NULL, &tt, &win) < 0)
 751       {
 752          const char *s = _("Can not write log, openpty() "
 753                            "failed (/dev/pts not mounted?)\n");
 754          fprintf(stderr, "%s",s);
 755          fprintf(term_out, "%s",s);
 756          master = slave = -1;
 757       }  else {
 758          struct termios rtt;
 759          rtt = tt;
 760          cfmakeraw(&rtt);
 761          rtt.c_lflag &= ~ECHO;
 762          tcsetattr(0, TCSAFLUSH, &rtt);
 763       }
 764
 765        // Fork dpkg
 766       pid_t Child;
 767       _config->Set("APT::Keep-Fds::",fd[1]);
 768       Child = ExecFork();
 769
 770       // This is the child
 771       if (Child == 0)
 772       {
 773          if(slave >= 0 && master >= 0)
 774          {
 775             setsid();
 776             ioctl(slave, TIOCSCTTY, 0);
 777             close(master);
 778             dup2(slave, 0);
 779             dup2(slave, 1);
 780             dup2(slave, 2);
 781             close(slave);
 782          }
 783          close(fd[0]); // close the read end of the pipe
 784
 785          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
 786             _exit(100);
 787
 788          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
 789          {
 790             int Flags,dummy;
 791             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
 792                _exit(100);
 793
 794             // Discard everything in stdin before forking dpkg
 795             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
 796                _exit(100);
 797
 798             while (read(STDIN_FILENO,&dummy,1) == 1);
 799
 800             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
 801                _exit(100);
 802          }
 803
 804
 805          /* No Job Control Stop Env is a magic dpkg var that prevents it
 806             from using sigstop */
 807          putenv("DPKG_NO_TSTP=yes");
 808          execvp(Args[0],(char **)Args);
 809          cerr << "Could not exec dpkg!" << endl;
 810          _exit(100);
 811       }
 812
 813       // clear the Keep-Fd again
 814       _config->Clear("APT::Keep-Fds",fd[1]);
 815
 816       // Wait for dpkg
 817       int Status = 0;
 818
 819       // we read from dpkg here
 820       int _dpkgin = fd[0];
 821       close(fd[1]);                        // close the write end of the pipe
 822
 823       // the result of the waitpid call
 824       int res;
 825       if(slave > 0)
 826          close(slave);
 827
 828       // setups fds
 829       fd_set rfds;
 830       struct timespec tv;
 831       sigset_t sigmask;
 832       sigset_t original_sigmask;
 833       sigemptyset(&sigmask);
 834       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
 835
 836       int select_ret;
 837       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
 838          if(res < 0) {
 839             // FIXME: move this to a function or something, looks ugly here
 840             // error handling, waitpid returned -1
 841             if (errno == EINTR)
 842                continue;
 843             RunScripts("DPkg::Post-Invoke");
 844
 845             // Restore sig int/quit
 846             signal(SIGQUIT,old_SIGQUIT);
 847             signal(SIGINT,old_SIGINT);
 848             return _error->Errno("waitpid","Couldn't wait for subprocess");
 849          }
 850
 851          // wait for input or output here
 852          FD_ZERO(&rfds);
 853          FD_SET(0, &rfds);
 854          FD_SET(_dpkgin, &rfds);
 855          if(master >= 0)
 856             FD_SET(master, &rfds);
 857          tv.tv_sec = 1;
 858          tv.tv_nsec = 0;
 859          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
 860                               &tv, &original_sigmask);
 861          if (select_ret == 0)
 862             continue;
 863          else if (select_ret < 0 && errno == EINTR)
 864             continue;
 865          else if (select_ret < 0)
 866          {
 867             perror("select() returned error");
 868             continue;
 869          }
 870
 871          if(master >= 0 && FD_ISSET(master, &rfds))
 872             DoTerminalPty(master);
 873          if(master >= 0 && FD_ISSET(0, &rfds))
 874             DoStdin(master);
 875          if(FD_ISSET(_dpkgin, &rfds))
 876             DoDpkgStatusFd(_dpkgin, OutStatusFd);
 877       }
 878       close(_dpkgin);
 879
 880       // Restore sig int/quit
 881       signal(SIGQUIT,old_SIGQUIT);
 882       signal(SIGINT,old_SIGINT);
 883
 884       if(master >= 0)
 885       {
 886          tcsetattr(0, TCSAFLUSH, &tt);
 887          close(master);
 888       }
 889
 890       // Check for an error code.
 891       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
 892       {
 893          // if it was set to "keep-dpkg-runing" then we won't return
 894          // here but keep the loop going and just report it as a error
 895          // for later
 896          bool stopOnError = _config->FindB("Dpkg::StopOnError",true);
 897
 898          if(stopOnError)
 899             RunScripts("DPkg::Post-Invoke");
 900
 901          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
 902             _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
 903          else if (WIFEXITED(Status) != 0)
 904             _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
 905          else
 906             _error->Error("Sub-process %s exited unexpectedly",Args[0]);
 907
 908          if(stopOnError)
 909          {
 910             CloseLog();
 911             return false;
 912          }
 913       }
 914    }
 915    CloseLog();
 916
 917    if (RunScripts("DPkg::Post-Invoke") == false)
 918       return false;
 919    return true;
 920 }
 921                                                                         /*}}}*/
 922 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
 923 // ---------------------------------------------------------------------
 924 /* */
 925 void pkgDPkgPM::Reset()
 926 {
 927    List.erase(List.begin(),List.end());
 928 }
 929                                                                         /*}}}*/
 930 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
 931 // ---------------------------------------------------------------------
 932 /* */
 933 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
 934 {
 935    string pkgname, reportfile, srcpkgname, pkgver, arch;
 936    string::size_type pos;
 937    FILE *report;
 938
 939    if (_config->FindB("Dpkg::ApportFailureReport",true) == false)
 940       return;
 941
 942    // only report the first error if we are in StopOnError=false mode
 943    // to prevent bogus reports
 944    if((_config->FindB("Dpkg::StopOnError",true) == false) && pkgFailures > 1)
 945       return;
 946
 947    // get the pkgname and reportfile
 948    pkgname = flNotDir(pkgpath);
 949    pos = pkgname.find('_');
 950    if(pos != string::npos)
 951       pkgname = pkgname.substr(0, pos);
 952
 953    // find the package versin and source package name
 954    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 955    if (Pkg.end() == true)
 956       return;
 957    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
 958    if (Ver.end() == true)
 959       return;
 960    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
 961    pkgRecords Recs(Cache);
 962    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
 963    srcpkgname = Parse.SourcePkg();
 964    if(srcpkgname.empty())
 965       srcpkgname = pkgname;
 966
 967    // if the file exists already, we check:
 968    // - if it was reported already (touched by apport).
 969    //   If not, we do nothing, otherwise
 970    //    we overwrite it. This is the same behaviour as apport
 971    // - if we have a report with the same pkgversion already
 972    //   then we skip it
 973    reportfile = flCombine("/var/crash",pkgname+".0.crash");
 974    if(FileExists(reportfile))
 975    {
 976       struct stat buf;
 977       char strbuf[255];
 978
 979       // check atime/mtime
 980       stat(reportfile.c_str(), &buf);
 981       if(buf.st_mtime > buf.st_atime)
 982          return;
 983
 984       // check if the existing report is the same version
 985       report = fopen(reportfile.c_str(),"r");
 986       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
 987       {
 988          if(strstr(strbuf,"Package:") == strbuf)
 989          {
 990             char pkgname[255], version[255];
 991             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
 992                if(strcmp(pkgver.c_str(), version) == 0)
 993                {
 994                   fclose(report);
 995                   return;
 996                }
 997          }
 998       }
 999       fclose(report);
1000    }
1001
1002    // now write the report
1003    arch = _config->Find("APT::Architecture");
1004    report = fopen(reportfile.c_str(),"w");
1005    if(report == NULL)
1006       return;
1007    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1008       chmod(reportfile.c_str(), 0);
1009    else
1010       chmod(reportfile.c_str(), 0600);
1011    fprintf(report, "ProblemType: Package\n");
1012    fprintf(report, "Architecture: %s\n", arch.c_str());
1013    time_t now = time(NULL);
1014    fprintf(report, "Date: %s" , ctime(&now));
1015    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1016    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1017    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1018
1019    // ensure that the log is flushed
1020    if(term_out)
1021       fflush(term_out);
1022
1023    // attach terminal log it if we have it
1024    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1025    if (!logfile_name.empty())
1026    {
1027       FILE *log = NULL;
1028       char buf[1024];
1029
1030       fprintf(report, "DpkgTerminalLog:\n");
1031       log = fopen(logfile_name.c_str(),"r");
1032       if(log != NULL)
1033       {
1034          while( fgets(buf, sizeof(buf), log) != NULL)
1035             fprintf(report, " %s", buf);
1036          fclose(log);
1037       }
1038    }
1039    fclose(report);
1040 }
1041                                                                         /*}}}*/