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/strutl.h>
  16
  17 #include <unistd.h>
  18 #include <stdlib.h>
  19 #include <fcntl.h>
  20 #include <sys/select.h>
  21 #include <sys/types.h>
  22 #include <sys/wait.h>
  23 #include <signal.h>
  24 #include <errno.h>
  25 #include <stdio.h>
  26 #include <sstream>
  27 #include <map>
  28
  29 #include <termios.h>
  30 #include <unistd.h>
  31 #include <sys/ioctl.h>
  32 #include <pty.h>
  33
  34 #include <config.h>
  35 #include <apti18n.h>
  36                                                                         /*}}}*/
  37
  38 using namespace std;
  39
  40 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
  41 // ---------------------------------------------------------------------
  42 /* */
  43 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache) : pkgPackageManager(Cache), dpkgbuf_pos(0)
  44 {
  45 }
  46                                                                         /*}}}*/
  47 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
  48 // ---------------------------------------------------------------------
  49 /* */
  50 pkgDPkgPM::~pkgDPkgPM()
  51 {
  52 }
  53                                                                         /*}}}*/
  54 // DPkgPM::Install - Install a package                                  /*{{{*/
  55 // ---------------------------------------------------------------------
  56 /* Add an install operation to the sequence list */
  57 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
  58 {
  59    if (File.empty() == true || Pkg.end() == true)
  60       return _error->Error("Internal Error, No file name for %s",Pkg.Name());
  61
  62    List.push_back(Item(Item::Install,Pkg,File));
  63    return true;
  64 }
  65                                                                         /*}}}*/
  66 // DPkgPM::Configure - Configure a package                              /*{{{*/
  67 // ---------------------------------------------------------------------
  68 /* Add a configure operation to the sequence list */
  69 bool pkgDPkgPM::Configure(PkgIterator Pkg)
  70 {
  71    if (Pkg.end() == true)
  72       return false;
  73
  74    List.push_back(Item(Item::Configure,Pkg));
  75    return true;
  76 }
  77                                                                         /*}}}*/
  78 // DPkgPM::Remove - Remove a package                                    /*{{{*/
  79 // ---------------------------------------------------------------------
  80 /* Add a remove operation to the sequence list */
  81 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
  82 {
  83    if (Pkg.end() == true)
  84       return false;
  85
  86    if (Purge == true)
  87       List.push_back(Item(Item::Purge,Pkg));
  88    else
  89       List.push_back(Item(Item::Remove,Pkg));
  90    return true;
  91 }
  92                                                                         /*}}}*/
  93 // DPkgPM::RunScripts - Run a set of scripts                            /*{{{*/
  94 // ---------------------------------------------------------------------
  95 /* This looks for a list of script sto run from the configuration file,
  96    each one is run with system from a forked child. */
  97 bool pkgDPkgPM::RunScripts(const char *Cnf)
  98 {
  99    Configuration::Item const *Opts = _config->Tree(Cnf);
 100    if (Opts == 0 || Opts->Child == 0)
 101       return true;
 102    Opts = Opts->Child;
 103
 104    // Fork for running the system calls
 105    pid_t Child = ExecFork();
 106
 107    // This is the child
 108    if (Child == 0)
 109    {
 110       if (chdir("/tmp/") != 0)
 111          _exit(100);
 112
 113       unsigned int Count = 1;
 114       for (; Opts != 0; Opts = Opts->Next, Count++)
 115       {
 116          if (Opts->Value.empty() == true)
 117             continue;
 118
 119          if (system(Opts->Value.c_str()) != 0)
 120             _exit(100+Count);
 121       }
 122       _exit(0);
 123    }
 124
 125    // Wait for the child
 126    int Status = 0;
 127    while (waitpid(Child,&Status,0) != Child)
 128    {
 129       if (errno == EINTR)
 130          continue;
 131       return _error->Errno("waitpid","Couldn't wait for subprocess");
 132    }
 133
 134    // Restore sig int/quit
 135    signal(SIGQUIT,SIG_DFL);
 136    signal(SIGINT,SIG_DFL);
 137
 138    // Check for an error code.
 139    if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
 140    {
 141       unsigned int Count = WEXITSTATUS(Status);
 142       if (Count > 100)
 143       {
 144          Count -= 100;
 145          for (; Opts != 0 && Count != 1; Opts = Opts->Next, Count--);
 146          _error->Error("Problem executing scripts %s '%s'",Cnf,Opts->Value.c_str());
 147       }
 148
 149       return _error->Error("Sub-process returned an error code");
 150    }
 151
 152    return true;
 153 }
 154                                                                         /*}}}*/
 155 // DPkgPM::SendV2Pkgs - Send version 2 package info                     /*{{{*/
 156 // ---------------------------------------------------------------------
 157 /* This is part of the helper script communication interface, it sends
 158    very complete information down to the other end of the pipe.*/
 159 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 160 {
 161    fprintf(F,"VERSION 2\n");
 162
 163    /* Write out all of the configuration directives by walking the
 164       configuration tree */
 165    const Configuration::Item *Top = _config->Tree(0);
 166    for (; Top != 0;)
 167    {
 168       if (Top->Value.empty() == false)
 169       {
 170          fprintf(F,"%s=%s\n",
 171                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 172                  QuoteString(Top->Value,"\n").c_str());
 173       }
 174
 175       if (Top->Child != 0)
 176       {
 177          Top = Top->Child;
 178          continue;
 179       }
 180
 181       while (Top != 0 && Top->Next == 0)
 182          Top = Top->Parent;
 183       if (Top != 0)
 184          Top = Top->Next;
 185    }
 186    fprintf(F,"\n");
 187
 188    // Write out the package actions in order.
 189    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 190    {
 191       pkgDepCache::StateCache &S = Cache[I->Pkg];
 192
 193       fprintf(F,"%s ",I->Pkg.Name());
 194       // Current version
 195       if (I->Pkg->CurrentVer == 0)
 196          fprintf(F,"- ");
 197       else
 198          fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
 199
 200       // Show the compare operator
 201       // Target version
 202       if (S.InstallVer != 0)
 203       {
 204          int Comp = 2;
 205          if (I->Pkg->CurrentVer != 0)
 206             Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
 207          if (Comp < 0)
 208             fprintf(F,"> ");
 209          if (Comp == 0)
 210             fprintf(F,"= ");
 211          if (Comp > 0)
 212             fprintf(F,"< ");
 213          fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
 214       }
 215       else
 216          fprintf(F,"> - ");
 217
 218       // Show the filename/operation
 219       if (I->Op == Item::Install)
 220       {
 221          // No errors here..
 222          if (I->File[0] != '/')
 223             fprintf(F,"**ERROR**\n");
 224          else
 225             fprintf(F,"%s\n",I->File.c_str());
 226       }
 227       if (I->Op == Item::Configure)
 228          fprintf(F,"**CONFIGURE**\n");
 229       if (I->Op == Item::Remove ||
 230           I->Op == Item::Purge)
 231          fprintf(F,"**REMOVE**\n");
 232
 233       if (ferror(F) != 0)
 234          return false;
 235    }
 236    return true;
 237 }
 238                                                                         /*}}}*/
 239 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 240 // ---------------------------------------------------------------------
 241 /* This looks for a list of scripts to run from the configuration file
 242    each one is run and is fed on standard input a list of all .deb files
 243    that are due to be installed. */
 244 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 245 {
 246    Configuration::Item const *Opts = _config->Tree(Cnf);
 247    if (Opts == 0 || Opts->Child == 0)
 248       return true;
 249    Opts = Opts->Child;
 250
 251    unsigned int Count = 1;
 252    for (; Opts != 0; Opts = Opts->Next, Count++)
 253    {
 254       if (Opts->Value.empty() == true)
 255          continue;
 256
 257       // Determine the protocol version
 258       string OptSec = Opts->Value;
 259       string::size_type Pos;
 260       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 261          Pos = OptSec.length();
 262       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 263
 264       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 265
 266       // Create the pipes
 267       int Pipes[2];
 268       if (pipe(Pipes) != 0)
 269          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 270       SetCloseExec(Pipes[0],true);
 271       SetCloseExec(Pipes[1],true);
 272
 273       // Purified Fork for running the script
 274       pid_t Process = ExecFork();
 275       if (Process == 0)
 276       {
 277          // Setup the FDs
 278          dup2(Pipes[0],STDIN_FILENO);
 279          SetCloseExec(STDOUT_FILENO,false);
 280          SetCloseExec(STDIN_FILENO,false);
 281          SetCloseExec(STDERR_FILENO,false);
 282
 283          const char *Args[4];
 284          Args[0] = "/bin/sh";
 285          Args[1] = "-c";
 286          Args[2] = Opts->Value.c_str();
 287          Args[3] = 0;
 288          execv(Args[0],(char **)Args);
 289          _exit(100);
 290       }
 291       close(Pipes[0]);
 292       FILE *F = fdopen(Pipes[1],"w");
 293       if (F == 0)
 294          return _error->Errno("fdopen","Faild to open new FD");
 295
 296       // Feed it the filenames.
 297       bool Die = false;
 298       if (Version <= 1)
 299       {
 300          for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 301          {
 302             // Only deal with packages to be installed from .deb
 303             if (I->Op != Item::Install)
 304                continue;
 305
 306             // No errors here..
 307             if (I->File[0] != '/')
 308                continue;
 309
 310             /* Feed the filename of each package that is pending install
 311                into the pipe. */
 312             fprintf(F,"%s\n",I->File.c_str());
 313             if (ferror(F) != 0)
 314             {
 315                Die = true;
 316                break;
 317             }
 318          }
 319       }
 320       else
 321          Die = !SendV2Pkgs(F);
 322
 323       fclose(F);
 324
 325       // Clean up the sub process
 326       if (ExecWait(Process,Opts->Value.c_str()) == false)
 327          return _error->Error("Failure running script %s",Opts->Value.c_str());
 328    }
 329
 330    return true;
 331 }
 332
 333                                                                         /*}}}*/
 334 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 335 // ---------------------------------------------------------------------
 336 /*
 337 */
 338 void pkgDPkgPM::DoStdin(int master)
 339 {
 340    char input_buf[256] = {0,};
 341    int len = read(0, input_buf, sizeof(input_buf));
 342    write(master, input_buf, len);
 343 }
 344                                                                         /*}}}*/
 345 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 346 // ---------------------------------------------------------------------
 347 /*
 348  * read the terminal pty and write log
 349  */
 350 void pkgDPkgPM::DoTerminalPty(int master, FILE *term_out)
 351 {
 352    char term_buf[1024] = {0,};
 353
 354    int len=read(master, term_buf, sizeof(term_buf));
 355    if(len <= 0)
 356       return;
 357    fwrite(term_buf, len, sizeof(char), term_out);
 358    write(1, term_buf, len);
 359 }
 360                                                                         /*}}}*/
 361 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 362 // ---------------------------------------------------------------------
 363 /*
 364  */
 365 void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
 366 {
 367    std::cerr << "got line: '" << line << "'" << std::endl;
 368 }
 369
 370 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 371 // ---------------------------------------------------------------------
 372 /*
 373  */
 374 void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
 375 {
 376    char *p, *q;
 377    int len;
 378
 379    len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
 380    dpkgbuf_pos += len;
 381    if(len <= 0)
 382       return;
 383
 384    // process line by line if we have a buffer
 385    p = q = dpkgbuf;
 386    while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
 387    {
 388       *q = 0;
 389       ProcessDpkgStatusLine(p);
 390       p=q+1; // continue with next line
 391    }
 392
 393    // now move the unprocessed bits (after the final \n that is now a 0x0)
 394    // to the start and update dpkgbuf_pos
 395    p = (char*)memrchr(dpkgbuf, 0, dpkgbuf_pos);
 396    if(p == NULL)
 397       return;
 398
 399    // we are interessted in the first char *after* 0x0
 400    p++;
 401
 402    // move the unprocessed tail to the start and update pos
 403    memmove(dpkgbuf, p, p-dpkgbuf);
 404    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 405 }
 406                                                                         /*}}}*/
 407
 408
 409 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 410 // ---------------------------------------------------------------------
 411 /* This globs the operations and calls dpkg
 412  *
 413  * If it is called with "OutStatusFd" set to a valid file descriptor
 414  * apt will report the install progress over this fd. It maps the
 415  * dpkg states a package goes through to human readable (and i10n-able)
 416  * names and calculates a percentage for each step.
 417 */
 418 bool pkgDPkgPM::Go(int OutStatusFd)
 419 {
 420    unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 421    unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 422
 423    if (RunScripts("DPkg::Pre-Invoke") == false)
 424       return false;
 425
 426    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 427       return false;
 428
 429    // prepare the progress reporting
 430    int Done = 0;
 431    int Total = 0;
 432    // map the dpkg states to the operations that are performed
 433    // (this is sorted in the same way as Item::Ops)
 434    static const struct DpkgState DpkgStatesOpMap[][5] = {
 435       // Install operation
 436       {
 437          {"half-installed", N_("Preparing %s")},
 438          {"unpacked", N_("Unpacking %s") },
 439          {NULL, NULL}
 440       },
 441       // Configure operation
 442       {
 443          {"unpacked",N_("Preparing to configure %s") },
 444          {"half-configured", N_("Configuring %s") },
 445          { "installed", N_("Installed %s")},
 446          {NULL, NULL}
 447       },
 448       // Remove operation
 449       {
 450          {"half-configured", N_("Preparing for removal of %s")},
 451          {"half-installed", N_("Removing %s")},
 452          {"config-files",  N_("Removed %s")},
 453          {NULL, NULL}
 454       },
 455       // Purge operation
 456       {
 457          {"config-files", N_("Preparing to completely remove %s")},
 458          {"not-installed", N_("Completely removed %s")},
 459          {NULL, NULL}
 460       },
 461    };
 462
 463    // the dpkg states that the pkg will run through, the string is
 464    // the package, the vector contains the dpkg states that the package
 465    // will go through
 466    map<string,vector<struct DpkgState> > PackageOps;
 467    // the dpkg states that are already done; the string is the package
 468    // the int is the state that is already done (e.g. a package that is
 469    // going to be install is already in state "half-installed")
 470    map<string,int> PackageOpsDone;
 471
 472    // init the PackageOps map, go over the list of packages that
 473    // that will be [installed|configured|removed|purged] and add
 474    // them to the PackageOps map (the dpkg states it goes through)
 475    // and the PackageOpsTranslations (human readable strings)
 476    for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
 477    {
 478       string name = (*I).Pkg.Name();
 479       PackageOpsDone[name] = 0;
 480       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 481       {
 482          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 483          Total++;
 484       }
 485    }
 486
 487    // this loop is runs once per operation
 488    for (vector<Item>::iterator I = List.begin(); I != List.end();)
 489    {
 490       vector<Item>::iterator J = I;
 491       for (; J != List.end() && J->Op == I->Op; J++);
 492
 493       // Generate the argument list
 494       const char *Args[MaxArgs + 50];
 495       if (J - I > (signed)MaxArgs)
 496          J = I + MaxArgs;
 497
 498       unsigned int n = 0;
 499       unsigned long Size = 0;
 500       string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 501       Args[n++] = Tmp.c_str();
 502       Size += strlen(Args[n-1]);
 503
 504       // Stick in any custom dpkg options
 505       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 506       if (Opts != 0)
 507       {
 508          Opts = Opts->Child;
 509          for (; Opts != 0; Opts = Opts->Next)
 510          {
 511             if (Opts->Value.empty() == true)
 512                continue;
 513             Args[n++] = Opts->Value.c_str();
 514             Size += Opts->Value.length();
 515          }
 516       }
 517
 518       char status_fd_buf[20];
 519       int fd[2];
 520       pipe(fd);
 521
 522       Args[n++] = "--status-fd";
 523       Size += strlen(Args[n-1]);
 524       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 525       Args[n++] = status_fd_buf;
 526       Size += strlen(Args[n-1]);
 527
 528       switch (I->Op)
 529       {
 530          case Item::Remove:
 531          Args[n++] = "--force-depends";
 532          Size += strlen(Args[n-1]);
 533          Args[n++] = "--force-remove-essential";
 534          Size += strlen(Args[n-1]);
 535          Args[n++] = "--remove";
 536          Size += strlen(Args[n-1]);
 537          break;
 538
 539          case Item::Purge:
 540          Args[n++] = "--force-depends";
 541          Size += strlen(Args[n-1]);
 542          Args[n++] = "--force-remove-essential";
 543          Size += strlen(Args[n-1]);
 544          Args[n++] = "--purge";
 545          Size += strlen(Args[n-1]);
 546          break;
 547
 548          case Item::Configure:
 549          Args[n++] = "--configure";
 550          Size += strlen(Args[n-1]);
 551          break;
 552
 553          case Item::Install:
 554          Args[n++] = "--unpack";
 555          Size += strlen(Args[n-1]);
 556          Args[n++] = "--auto-deconfigure";
 557          Size += strlen(Args[n-1]);
 558          break;
 559       }
 560
 561       // Write in the file or package names
 562       if (I->Op == Item::Install)
 563       {
 564          for (;I != J && Size < MaxArgBytes; I++)
 565          {
 566             if (I->File[0] != '/')
 567                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
 568             Args[n++] = I->File.c_str();
 569             Size += strlen(Args[n-1]);
 570          }
 571       }
 572       else
 573       {
 574          for (;I != J && Size < MaxArgBytes; I++)
 575          {
 576             Args[n++] = I->Pkg.Name();
 577             Size += strlen(Args[n-1]);
 578          }
 579       }
 580       Args[n] = 0;
 581       J = I;
 582
 583       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
 584       {
 585          for (unsigned int k = 0; k != n; k++)
 586             clog << Args[k] << ' ';
 587          clog << endl;
 588          continue;
 589       }
 590
 591       cout << flush;
 592       clog << flush;
 593       cerr << flush;
 594
 595       /* Mask off sig int/quit. We do this because dpkg also does when
 596          it forks scripts. What happens is that when you hit ctrl-c it sends
 597          it to all processes in the group. Since dpkg ignores the signal
 598          it doesn't die but we do! So we must also ignore it */
 599       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
 600       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 601
 602       struct    termios tt;
 603       struct    winsize win;
 604       int       master;
 605       int       slave;
 606
 607       // FIXME: setup sensible signal handling (*ick*)
 608       tcgetattr(0, &tt);
 609       ioctl(0, TIOCGWINSZ, (char *)&win);
 610       if (openpty(&master, &slave, NULL, &tt, &win) < 0)
 611       {
 612          fprintf(stderr, _("openpty failed\n"));
 613       }
 614
 615       struct termios rtt;
 616       rtt = tt;
 617       cfmakeraw(&rtt);
 618       rtt.c_lflag &= ~ECHO;
 619       tcsetattr(0, TCSAFLUSH, &rtt);
 620
 621        // Fork dpkg
 622       pid_t Child;
 623       _config->Set("APT::Keep-Fds::",fd[1]);
 624       Child = ExecFork();
 625
 626       // This is the child
 627       if (Child == 0)
 628       {
 629          setsid();
 630          ioctl(slave, TIOCSCTTY, 0);
 631          close(master);
 632          dup2(slave, 0);
 633          dup2(slave, 1);
 634          dup2(slave, 2);
 635          close(slave);
 636          close(fd[0]); // close the read end of the pipe
 637
 638          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
 639             _exit(100);
 640
 641          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
 642          {
 643             int Flags,dummy;
 644             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
 645                _exit(100);
 646
 647             // Discard everything in stdin before forking dpkg
 648             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
 649                _exit(100);
 650
 651             while (read(STDIN_FILENO,&dummy,1) == 1);
 652
 653             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
 654                _exit(100);
 655          }
 656
 657
 658          /* No Job Control Stop Env is a magic dpkg var that prevents it
 659             from using sigstop */
 660          putenv("DPKG_NO_TSTP=yes");
 661          execvp(Args[0],(char **)Args);
 662          cerr << "Could not exec dpkg!" << endl;
 663          _exit(100);
 664       }
 665
 666       // clear the Keep-Fd again
 667       _config->Clear("APT::Keep-Fds",fd[1]);
 668
 669       // Wait for dpkg
 670       int Status = 0;
 671
 672       // we read from dpkg here
 673       int _dpkgin = fd[0];
 674       close(fd[1]);                        // close the write end of the pipe
 675
 676       // the read buffers for the communication with dpkg
 677       char buf[2] = {0,0};
 678
 679       // the result of the waitpid call
 680       int res;
 681       close(slave);
 682
 683       // FIXME: make this a apt config option and add a logrotate file
 684       FILE *term_out = fopen("/var/log/dpkg-out.log","a");
 685       chmod("/var/log/dpkg-out.log", 0600);
 686       // output current time
 687       char outstr[200];
 688       time_t t = time(NULL);
 689       struct tm *tmp = localtime(&t);
 690       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 691       fprintf(term_out, "Log started: ");
 692       fprintf(term_out, outstr);
 693       fprintf(term_out, "\n");
 694
 695       // setups fds
 696       fd_set rfds;
 697       struct timeval tv;
 698       int select_ret;
 699       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
 700          if(res < 0) {
 701             // FIXME: move this to a function or something, looks ugly here
 702             // error handling, waitpid returned -1
 703             if (errno == EINTR)
 704                continue;
 705             RunScripts("DPkg::Post-Invoke");
 706
 707             // Restore sig int/quit
 708             signal(SIGQUIT,old_SIGQUIT);
 709             signal(SIGINT,old_SIGINT);
 710             return _error->Errno("waitpid","Couldn't wait for subprocess");
 711          }
 712
 713          // wait for input or output here
 714          FD_ZERO(&rfds);
 715          FD_SET(0, &rfds);
 716          FD_SET(_dpkgin, &rfds);
 717          FD_SET(master, &rfds);
 718          tv.tv_sec = 1;
 719          tv.tv_usec = 0;
 720          select_ret = select(max(master, _dpkgin)+1, &rfds, NULL, NULL, &tv);
 721          if (select_ret < 0)
 722             std::cerr << "Error in select()" << std::endl;
 723          else if (select_ret == 0)
 724             continue;
 725
 726          if(FD_ISSET(master, &rfds))
 727             DoTerminalPty(master, term_out);
 728          if(FD_ISSET(0, &rfds))
 729             DoStdin(master);
 730
 731          if(FD_ISSET(_dpkgin, &rfds))
 732             DoDpkgStatusFd(_dpkgin);
 733 #if 0
 734          while(true)
 735          {
 736             if(read(_dpkgin, buf, 1) <= 0)
 737                break;
 738
 739             // sanity check (should never happen)
 740             if(strlen(line) >= sizeof(line)-10)
 741             {
 742                _error->Error("got a overlong line from dpkg: '%s'",line);
 743                line[0]=0;
 744                continue;
 745             }
 746             // append to line, check if we got a complete line
 747             strcat(line, buf);
 748             if(buf[0] != '\n')
 749                continue;
 750
 751             if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 752                std::clog << "got from dpkg '" << line << "'" << std::endl;
 753
 754             // the status we output
 755             ostringstream status;
 756
 757             /* dpkg sends strings like this:
 758                'status:   <pkg>:  <pkg  qstate>'
 759                errors look like this:
 760                '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
 761                and conffile-prompt like this
 762                'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 763
 764             */
 765             char* list[5];
 766             //        dpkg sends multiline error messages sometimes (see
 767             //        #374195 for a example. we should support this by
 768             //        either patching dpkg to not send multiline over the
 769             //        statusfd or by rewriting the code here to deal with
 770             //        it. for now we just ignore it and not crash
 771             TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 772             char *pkg = list[1];
 773             char *action = _strstrip(list[2]);
 774             if( pkg == NULL || action == NULL)
 775             {
 776                if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 777                   std::clog << "ignoring line: not enough ':'" << std::endl;
 778                // reset the line buffer
 779                line[0]=0;
 780                continue;
 781             }
 782
 783             if(strncmp(action,"error",strlen("error")) == 0)
 784             {
 785                status << "pmerror:" << list[1]
 786                       << ":"  << (Done/float(Total)*100.0)
 787                       << ":" << list[3]
 788                       << endl;
 789                if(OutStatusFd > 0)
 790                   write(OutStatusFd, status.str().c_str(), status.str().size());
 791                line[0]=0;
 792                if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 793                   std::clog << "send: '" << status.str() << "'" << endl;
 794                continue;
 795             }
 796             if(strncmp(action,"conffile",strlen("conffile")) == 0)
 797             {
 798                status << "pmconffile:" << list[1]
 799                       << ":"  << (Done/float(Total)*100.0)
 800                       << ":" << list[3]
 801                       << endl;
 802                if(OutStatusFd > 0)
 803                   write(OutStatusFd, status.str().c_str(), status.str().size());
 804                line[0]=0;
 805                if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 806                   std::clog << "send: '" << status.str() << "'" << endl;
 807                continue;
 808             }
 809
 810             vector<struct DpkgState> &states = PackageOps[pkg];
 811             const char *next_action = NULL;
 812             if(PackageOpsDone[pkg] < states.size())
 813                next_action = states[PackageOpsDone[pkg]].state;
 814             // check if the package moved to the next dpkg state
 815             if(next_action && (strcmp(action, next_action) == 0))
 816             {
 817                // only read the translation if there is actually a next
 818                // action
 819                const char *translation = _(states[PackageOpsDone[pkg]].str);
 820                char s[200];
 821                snprintf(s, sizeof(s), translation, pkg);
 822
 823                // we moved from one dpkg state to a new one, report that
 824                PackageOpsDone[pkg]++;
 825                Done++;
 826                // build the status str
 827                status << "pmstatus:" << pkg
 828                       << ":"  << (Done/float(Total)*100.0)
 829                       << ":" << s
 830                       << endl;
 831                if(OutStatusFd > 0)
 832                   write(OutStatusFd, status.str().c_str(), status.str().size());
 833                if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 834                   std::clog << "send: '" << status.str() << "'" << endl;
 835
 836             }
 837             if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 838                std::clog << "(parsed from dpkg) pkg: " << pkg
 839                          << " action: " << action << endl;
 840
 841             // reset the line buffer
 842             line[0]=0;
 843          }
 844 #endif
 845       }
 846       close(_dpkgin);
 847       fclose(term_out);
 848
 849       // Restore sig int/quit
 850       signal(SIGQUIT,old_SIGQUIT);
 851       signal(SIGINT,old_SIGINT);
 852
 853       tcsetattr(0, TCSAFLUSH, &tt);
 854
 855       // Check for an error code.
 856       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
 857       {
 858          // if it was set to "keep-dpkg-runing" then we won't return
 859          // here but keep the loop going and just report it as a error
 860          // for later
 861          bool stopOnError = _config->FindB("Dpkg::StopOnError",true);
 862
 863          if(stopOnError)
 864             RunScripts("DPkg::Post-Invoke");
 865
 866          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
 867             _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
 868          else if (WIFEXITED(Status) != 0)
 869             _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
 870          else
 871             _error->Error("Sub-process %s exited unexpectedly",Args[0]);
 872
 873          if(stopOnError)
 874             return false;
 875       }
 876    }
 877
 878    if (RunScripts("DPkg::Post-Invoke") == false)
 879       return false;
 880    return true;
 881 }
 882                                                                         /*}}}*/
 883 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
 884 // ---------------------------------------------------------------------
 885 /* */
 886 void pkgDPkgPM::Reset()
 887 {
 888    List.erase(List.begin(),List.end());
 889 }
 890                                                                         /*}}}*/