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)
  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[2] = {0,0};
 341   while(read(0, input_buf, 1) > 0)
 342       write(master, input_buf, 1);
 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[2] = {0,0};
 353
 354    // read a single char, make sure that the read can't block
 355    // (otherwise we may leave zombies)
 356    do
 357    {
 358       fwrite(term_buf, 1, 1, term_out);
 359       write(1, term_buf, 1);
 360    } while(read(master, term_buf, 1) > 0);
 361 }
 362                                                                         /*}}}*/
 363
 364
 365
 366 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 367 // ---------------------------------------------------------------------
 368 /* This globs the operations and calls dpkg
 369  *
 370  * If it is called with "OutStatusFd" set to a valid file descriptor
 371  * apt will report the install progress over this fd. It maps the
 372  * dpkg states a package goes through to human readable (and i10n-able)
 373  * names and calculates a percentage for each step.
 374 */
 375 bool pkgDPkgPM::Go(int OutStatusFd)
 376 {
 377    unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 378    unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 379
 380    if (RunScripts("DPkg::Pre-Invoke") == false)
 381       return false;
 382
 383    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 384       return false;
 385
 386    // prepare the progress reporting
 387    int Done = 0;
 388    int Total = 0;
 389    // map the dpkg states to the operations that are performed
 390    // (this is sorted in the same way as Item::Ops)
 391    static const struct DpkgState DpkgStatesOpMap[][5] = {
 392       // Install operation
 393       {
 394          {"half-installed", N_("Preparing %s")},
 395          {"unpacked", N_("Unpacking %s") },
 396          {NULL, NULL}
 397       },
 398       // Configure operation
 399       {
 400          {"unpacked",N_("Preparing to configure %s") },
 401          {"half-configured", N_("Configuring %s") },
 402          { "installed", N_("Installed %s")},
 403          {NULL, NULL}
 404       },
 405       // Remove operation
 406       {
 407          {"half-configured", N_("Preparing for removal of %s")},
 408          {"half-installed", N_("Removing %s")},
 409          {"config-files",  N_("Removed %s")},
 410          {NULL, NULL}
 411       },
 412       // Purge operation
 413       {
 414          {"config-files", N_("Preparing to completely remove %s")},
 415          {"not-installed", N_("Completely removed %s")},
 416          {NULL, NULL}
 417       },
 418    };
 419
 420    // the dpkg states that the pkg will run through, the string is
 421    // the package, the vector contains the dpkg states that the package
 422    // will go through
 423    map<string,vector<struct DpkgState> > PackageOps;
 424    // the dpkg states that are already done; the string is the package
 425    // the int is the state that is already done (e.g. a package that is
 426    // going to be install is already in state "half-installed")
 427    map<string,int> PackageOpsDone;
 428
 429    // init the PackageOps map, go over the list of packages that
 430    // that will be [installed|configured|removed|purged] and add
 431    // them to the PackageOps map (the dpkg states it goes through)
 432    // and the PackageOpsTranslations (human readable strings)
 433    for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
 434    {
 435       string name = (*I).Pkg.Name();
 436       PackageOpsDone[name] = 0;
 437       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 438       {
 439          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 440          Total++;
 441       }
 442    }
 443
 444    // this loop is runs once per operation
 445    for (vector<Item>::iterator I = List.begin(); I != List.end();)
 446    {
 447       vector<Item>::iterator J = I;
 448       for (; J != List.end() && J->Op == I->Op; J++);
 449
 450       // Generate the argument list
 451       const char *Args[MaxArgs + 50];
 452       if (J - I > (signed)MaxArgs)
 453          J = I + MaxArgs;
 454
 455       unsigned int n = 0;
 456       unsigned long Size = 0;
 457       string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 458       Args[n++] = Tmp.c_str();
 459       Size += strlen(Args[n-1]);
 460
 461       // Stick in any custom dpkg options
 462       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 463       if (Opts != 0)
 464       {
 465          Opts = Opts->Child;
 466          for (; Opts != 0; Opts = Opts->Next)
 467          {
 468             if (Opts->Value.empty() == true)
 469                continue;
 470             Args[n++] = Opts->Value.c_str();
 471             Size += Opts->Value.length();
 472          }
 473       }
 474
 475       char status_fd_buf[20];
 476       int fd[2];
 477       pipe(fd);
 478
 479       Args[n++] = "--status-fd";
 480       Size += strlen(Args[n-1]);
 481       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 482       Args[n++] = status_fd_buf;
 483       Size += strlen(Args[n-1]);
 484
 485       switch (I->Op)
 486       {
 487          case Item::Remove:
 488          Args[n++] = "--force-depends";
 489          Size += strlen(Args[n-1]);
 490          Args[n++] = "--force-remove-essential";
 491          Size += strlen(Args[n-1]);
 492          Args[n++] = "--remove";
 493          Size += strlen(Args[n-1]);
 494          break;
 495
 496          case Item::Purge:
 497          Args[n++] = "--force-depends";
 498          Size += strlen(Args[n-1]);
 499          Args[n++] = "--force-remove-essential";
 500          Size += strlen(Args[n-1]);
 501          Args[n++] = "--purge";
 502          Size += strlen(Args[n-1]);
 503          break;
 504
 505          case Item::Configure:
 506          Args[n++] = "--configure";
 507          Size += strlen(Args[n-1]);
 508          break;
 509
 510          case Item::Install:
 511          Args[n++] = "--unpack";
 512          Size += strlen(Args[n-1]);
 513          Args[n++] = "--auto-deconfigure";
 514          Size += strlen(Args[n-1]);
 515          break;
 516       }
 517
 518       // Write in the file or package names
 519       if (I->Op == Item::Install)
 520       {
 521          for (;I != J && Size < MaxArgBytes; I++)
 522          {
 523             if (I->File[0] != '/')
 524                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
 525             Args[n++] = I->File.c_str();
 526             Size += strlen(Args[n-1]);
 527          }
 528       }
 529       else
 530       {
 531          for (;I != J && Size < MaxArgBytes; I++)
 532          {
 533             Args[n++] = I->Pkg.Name();
 534             Size += strlen(Args[n-1]);
 535          }
 536       }
 537       Args[n] = 0;
 538       J = I;
 539
 540       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
 541       {
 542          for (unsigned int k = 0; k != n; k++)
 543             clog << Args[k] << ' ';
 544          clog << endl;
 545          continue;
 546       }
 547
 548       cout << flush;
 549       clog << flush;
 550       cerr << flush;
 551
 552       /* Mask off sig int/quit. We do this because dpkg also does when
 553          it forks scripts. What happens is that when you hit ctrl-c it sends
 554          it to all processes in the group. Since dpkg ignores the signal
 555          it doesn't die but we do! So we must also ignore it */
 556       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
 557       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 558
 559       struct    termios tt;
 560       struct    winsize win;
 561       int       master;
 562       int       slave;
 563
 564       // FIXME: setup sensible signal handling (*ick*)
 565       tcgetattr(0, &tt);
 566       ioctl(0, TIOCGWINSZ, (char *)&win);
 567       if (openpty(&master, &slave, NULL, &tt, &win) < 0)
 568       {
 569          fprintf(stderr, _("openpty failed\n"));
 570       }
 571
 572       struct termios rtt;
 573       rtt = tt;
 574       cfmakeraw(&rtt);
 575       rtt.c_lflag &= ~ECHO;
 576       tcsetattr(0, TCSAFLUSH, &rtt);
 577
 578        // Fork dpkg
 579       pid_t Child;
 580       _config->Set("APT::Keep-Fds::",fd[1]);
 581       Child = ExecFork();
 582
 583       // This is the child
 584       if (Child == 0)
 585       {
 586          setsid();
 587          ioctl(slave, TIOCSCTTY, 0);
 588          close(master);
 589          dup2(slave, 0);
 590          dup2(slave, 1);
 591          dup2(slave, 2);
 592          close(slave);
 593
 594          close(fd[0]); // close the read end of the pipe
 595
 596          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
 597             _exit(100);
 598
 599          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
 600          {
 601             int Flags,dummy;
 602             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
 603                _exit(100);
 604
 605             // Discard everything in stdin before forking dpkg
 606             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
 607                _exit(100);
 608
 609             while (read(STDIN_FILENO,&dummy,1) == 1);
 610
 611             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
 612                _exit(100);
 613          }
 614
 615
 616          /* No Job Control Stop Env is a magic dpkg var that prevents it
 617             from using sigstop */
 618          putenv("DPKG_NO_TSTP=yes");
 619          execvp(Args[0],(char **)Args);
 620          cerr << "Could not exec dpkg!" << endl;
 621          _exit(100);
 622       }
 623
 624       // clear the Keep-Fd again
 625       _config->Clear("APT::Keep-Fds",fd[1]);
 626
 627       // Wait for dpkg
 628       int Status = 0;
 629
 630       // we read from dpkg here
 631       int _dpkgin = fd[0];
 632       fcntl(_dpkgin, F_SETFL, O_NONBLOCK);
 633       close(fd[1]);                        // close the write end of the pipe
 634
 635       // the read buffers for the communication with dpkg
 636       char line[1024] = {0,};
 637
 638       char buf[2] = {0,0};
 639
 640       // the result of the waitpid call
 641       int res;
 642       close(slave);
 643       fcntl(0, F_SETFL, O_NONBLOCK);
 644       fcntl(master, F_SETFL, O_NONBLOCK);
 645       // FIXME: make this a apt config option and add a logrotate file
 646       FILE *term_out = fopen("/var/log/dpkg-out.log","a");
 647       chmod("/var/log/dpkg-out.log", 0600);
 648
 649       fd_set rfds;
 650       struct timeval tv;
 651       int select_ret;
 652       FD_ZERO(&rfds);
 653       FD_SET(0, &rfds);
 654       FD_SET(_dpkgin, &rfds);
 655       FD_SET(master, &rfds);
 656       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
 657          if(res < 0) {
 658             // FIXME: move this to a function or something, looks ugly here
 659             // error handling, waitpid returned -1
 660             if (errno == EINTR)
 661                continue;
 662             RunScripts("DPkg::Post-Invoke");
 663
 664             // Restore sig int/quit
 665             signal(SIGQUIT,old_SIGQUIT);
 666             signal(SIGINT,old_SIGINT);
 667             return _error->Errno("waitpid","Couldn't wait for subprocess");
 668          }
 669
 670          // wait for input or output here
 671          tv.tv_sec = 1;
 672          tv.tv_usec = 0;
 673          select_ret = select(max(master, _dpkgin)+1, &rfds, NULL, &rfds, &tv);
 674          if (select_ret < 0)
 675             std::cerr << "Error in select()" << std::endl;
 676          else if (select_ret == 0)
 677             continue;
 678
 679          DoStdin(master);
 680          DoTerminalPty(master, term_out);
 681          //DoDpkgStatusFd();
 682
 683          int len = read(_dpkgin, buf, 1);
 684
 685          // nothing to read from dpkg , wait a bit for more
 686          if(len <= 0)
 687          {
 688             usleep(1000);
 689             continue;
 690          }
 691
 692          // sanity check (should never happen)
 693          if(strlen(line) >= sizeof(line)-10)
 694          {
 695             _error->Error("got a overlong line from dpkg: '%s'",line);
 696             line[0]=0;
 697          }
 698          // append to line, check if we got a complete line
 699          strcat(line, buf);
 700          if(buf[0] != '\n')
 701             continue;
 702
 703          if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 704             std::clog << "got from dpkg '" << line << "'" << std::endl;
 705
 706          // the status we output
 707          ostringstream status;
 708
 709          /* dpkg sends strings like this:
 710             'status:   <pkg>:  <pkg  qstate>'
 711             errors look like this:
 712             '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
 713             and conffile-prompt like this
 714             'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 715
 716          */
 717          char* list[5];
 718          //        dpkg sends multiline error messages sometimes (see
 719          //        #374195 for a example. we should support this by
 720          //        either patching dpkg to not send multiline over the
 721          //        statusfd or by rewriting the code here to deal with
 722          //        it. for now we just ignore it and not crash
 723          TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 724          char *pkg = list[1];
 725          char *action = _strstrip(list[2]);
 726          if( pkg == NULL || action == NULL)
 727          {
 728             if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 729                std::clog << "ignoring line: not enough ':'" << std::endl;
 730             // reset the line buffer
 731             line[0]=0;
 732             continue;
 733          }
 734
 735          if(strncmp(action,"error",strlen("error")) == 0)
 736          {
 737             status << "pmerror:" << list[1]
 738                    << ":"  << (Done/float(Total)*100.0)
 739                    << ":" << list[3]
 740                    << endl;
 741             if(OutStatusFd > 0)
 742                write(OutStatusFd, status.str().c_str(), status.str().size());
 743             line[0]=0;
 744             if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 745                std::clog << "send: '" << status.str() << "'" << endl;
 746             continue;
 747          }
 748          if(strncmp(action,"conffile",strlen("conffile")) == 0)
 749          {
 750             status << "pmconffile:" << list[1]
 751                    << ":"  << (Done/float(Total)*100.0)
 752                    << ":" << list[3]
 753                    << endl;
 754             if(OutStatusFd > 0)
 755                write(OutStatusFd, status.str().c_str(), status.str().size());
 756             line[0]=0;
 757             if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 758                std::clog << "send: '" << status.str() << "'" << endl;
 759             continue;
 760          }
 761
 762          vector<struct DpkgState> &states = PackageOps[pkg];
 763          const char *next_action = NULL;
 764          if(PackageOpsDone[pkg] < states.size())
 765             next_action = states[PackageOpsDone[pkg]].state;
 766          // check if the package moved to the next dpkg state
 767          if(next_action && (strcmp(action, next_action) == 0))
 768          {
 769             // only read the translation if there is actually a next
 770             // action
 771             const char *translation = _(states[PackageOpsDone[pkg]].str);
 772             char s[200];
 773             snprintf(s, sizeof(s), translation, pkg);
 774
 775             // we moved from one dpkg state to a new one, report that
 776             PackageOpsDone[pkg]++;
 777             Done++;
 778             // build the status str
 779             status << "pmstatus:" << pkg
 780                    << ":"  << (Done/float(Total)*100.0)
 781                    << ":" << s
 782                    << endl;
 783             if(OutStatusFd > 0)
 784                write(OutStatusFd, status.str().c_str(), status.str().size());
 785             if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 786                std::clog << "send: '" << status.str() << "'" << endl;
 787
 788          }
 789          if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 790             std::clog << "(parsed from dpkg) pkg: " << pkg
 791                       << " action: " << action << endl;
 792
 793          // reset the line buffer
 794          line[0]=0;
 795       }
 796       close(_dpkgin);
 797       fclose(term_out);
 798
 799       // Restore sig int/quit
 800       signal(SIGQUIT,old_SIGQUIT);
 801       signal(SIGINT,old_SIGINT);
 802
 803       tcsetattr(0, TCSAFLUSH, &tt);
 804
 805       // Check for an error code.
 806       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
 807       {
 808          // if it was set to "keep-dpkg-runing" then we won't return
 809          // here but keep the loop going and just report it as a error
 810          // for later
 811          bool stopOnError = _config->FindB("Dpkg::StopOnError",true);
 812
 813          if(stopOnError)
 814             RunScripts("DPkg::Post-Invoke");
 815
 816          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
 817             _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
 818          else if (WIFEXITED(Status) != 0)
 819             _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
 820          else
 821             _error->Error("Sub-process %s exited unexpectedly",Args[0]);
 822
 823          if(stopOnError)
 824             return false;
 825       }
 826    }
 827
 828    if (RunScripts("DPkg::Post-Invoke") == false)
 829       return false;
 830    return true;
 831 }
 832                                                                         /*}}}*/
 833 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
 834 // ---------------------------------------------------------------------
 835 /* */
 836 void pkgDPkgPM::Reset()
 837 {
 838    List.erase(List.begin(),List.end());
 839 }
 840                                                                         /*}}}*/