apt-pkg/deb/dpkgpm.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
   4 /* ######################################################################
   5
   6    DPKG Package Manager - Provide an interface to dpkg
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include <apt-pkg/dpkgpm.h>
  12 #include <apt-pkg/error.h>
  13 #include <apt-pkg/configuration.h>
  14 #include <apt-pkg/depcache.h>
  15 #include <apt-pkg/pkgrecords.h>
  16 #include <apt-pkg/strutl.h>
  17 #include <apti18n.h>
  18 #include <apt-pkg/fileutl.h>
  19
  20 #include <unistd.h>
  21 #include <stdlib.h>
  22 #include <fcntl.h>
  23 #include <sys/select.h>
  24 #include <sys/types.h>
  25 #include <sys/wait.h>
  26 #include <signal.h>
  27 #include <errno.h>
  28 #include <string.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <algorithm>
  32 #include <sstream>
  33 #include <map>
  34
  35 #include <termios.h>
  36 #include <unistd.h>
  37 #include <sys/ioctl.h>
  38 #include <pty.h>
  39
  40 #include <config.h>
  41 #include <apti18n.h>
  42                                                                         /*}}}*/
  43
  44 using namespace std;
  45
  46 namespace
  47 {
  48   // Maps the dpkg "processing" info to human readable names.  Entry 0
  49   // of each array is the key, entry 1 is the value.
  50   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  51     std::make_pair("install",   N_("Installing %s")),
  52     std::make_pair("configure", N_("Configuring %s")),
  53     std::make_pair("remove",    N_("Removing %s")),
  54     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  55   };
  56
  57   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  58   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  59
  60   // Predicate to test whether an entry in the PackageProcessingOps
  61   // array matches a string.
  62   class MatchProcessingOp
  63   {
  64     const char *target;
  65
  66   public:
  67     MatchProcessingOp(const char *the_target)
  68       : target(the_target)
  69     {
  70     }
  71
  72     bool operator()(const std::pair<const char *, const char *> &pair) const
  73     {
  74       return strcmp(pair.first, target) == 0;
  75     }
  76   };
  77 }
  78
  79 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
  80 // ---------------------------------------------------------------------
  81 /* */
  82 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
  83    : pkgPackageManager(Cache), dpkgbuf_pos(0),
  84      term_out(NULL), PackagesDone(0), PackagesTotal(0), pkgFailures(0)
  85 {
  86 }
  87                                                                         /*}}}*/
  88 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
  89 // ---------------------------------------------------------------------
  90 /* */
  91 pkgDPkgPM::~pkgDPkgPM()
  92 {
  93 }
  94                                                                         /*}}}*/
  95 // DPkgPM::Install - Install a package                                  /*{{{*/
  96 // ---------------------------------------------------------------------
  97 /* Add an install operation to the sequence list */
  98 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
  99 {
 100    if (File.empty() == true || Pkg.end() == true)
 101       return _error->Error("Internal Error, No file name for %s",Pkg.Name());
 102
 103    List.push_back(Item(Item::Install,Pkg,File));
 104    return true;
 105 }
 106                                                                         /*}}}*/
 107 // DPkgPM::Configure - Configure a package                              /*{{{*/
 108 // ---------------------------------------------------------------------
 109 /* Add a configure operation to the sequence list */
 110 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 111 {
 112    if (Pkg.end() == true)
 113       return false;
 114
 115    List.push_back(Item(Item::Configure,Pkg));
 116    return true;
 117 }
 118                                                                         /*}}}*/
 119 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 120 // ---------------------------------------------------------------------
 121 /* Add a remove operation to the sequence list */
 122 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 123 {
 124    if (Pkg.end() == true)
 125       return false;
 126
 127    if (Purge == true)
 128       List.push_back(Item(Item::Purge,Pkg));
 129    else
 130       List.push_back(Item(Item::Remove,Pkg));
 131    return true;
 132 }
 133                                                                         /*}}}*/
 134 // DPkgPM::SendV2Pkgs - Send version 2 package info                     /*{{{*/
 135 // ---------------------------------------------------------------------
 136 /* This is part of the helper script communication interface, it sends
 137    very complete information down to the other end of the pipe.*/
 138 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 139 {
 140    fprintf(F,"VERSION 2\n");
 141
 142    /* Write out all of the configuration directives by walking the
 143       configuration tree */
 144    const Configuration::Item *Top = _config->Tree(0);
 145    for (; Top != 0;)
 146    {
 147       if (Top->Value.empty() == false)
 148       {
 149          fprintf(F,"%s=%s\n",
 150                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 151                  QuoteString(Top->Value,"\n").c_str());
 152       }
 153
 154       if (Top->Child != 0)
 155       {
 156          Top = Top->Child;
 157          continue;
 158       }
 159
 160       while (Top != 0 && Top->Next == 0)
 161          Top = Top->Parent;
 162       if (Top != 0)
 163          Top = Top->Next;
 164    }
 165    fprintf(F,"\n");
 166
 167    // Write out the package actions in order.
 168    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 169    {
 170       pkgDepCache::StateCache &S = Cache[I->Pkg];
 171
 172       fprintf(F,"%s ",I->Pkg.Name());
 173       // Current version
 174       if (I->Pkg->CurrentVer == 0)
 175          fprintf(F,"- ");
 176       else
 177          fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
 178
 179       // Show the compare operator
 180       // Target version
 181       if (S.InstallVer != 0)
 182       {
 183          int Comp = 2;
 184          if (I->Pkg->CurrentVer != 0)
 185             Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
 186          if (Comp < 0)
 187             fprintf(F,"> ");
 188          if (Comp == 0)
 189             fprintf(F,"= ");
 190          if (Comp > 0)
 191             fprintf(F,"< ");
 192          fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
 193       }
 194       else
 195          fprintf(F,"> - ");
 196
 197       // Show the filename/operation
 198       if (I->Op == Item::Install)
 199       {
 200          // No errors here..
 201          if (I->File[0] != '/')
 202             fprintf(F,"**ERROR**\n");
 203          else
 204             fprintf(F,"%s\n",I->File.c_str());
 205       }
 206       if (I->Op == Item::Configure)
 207          fprintf(F,"**CONFIGURE**\n");
 208       if (I->Op == Item::Remove ||
 209           I->Op == Item::Purge)
 210          fprintf(F,"**REMOVE**\n");
 211
 212       if (ferror(F) != 0)
 213          return false;
 214    }
 215    return true;
 216 }
 217                                                                         /*}}}*/
 218 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 219 // ---------------------------------------------------------------------
 220 /* This looks for a list of scripts to run from the configuration file
 221    each one is run and is fed on standard input a list of all .deb files
 222    that are due to be installed. */
 223 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 224 {
 225    Configuration::Item const *Opts = _config->Tree(Cnf);
 226    if (Opts == 0 || Opts->Child == 0)
 227       return true;
 228    Opts = Opts->Child;
 229
 230    unsigned int Count = 1;
 231    for (; Opts != 0; Opts = Opts->Next, Count++)
 232    {
 233       if (Opts->Value.empty() == true)
 234          continue;
 235
 236       // Determine the protocol version
 237       string OptSec = Opts->Value;
 238       string::size_type Pos;
 239       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 240          Pos = OptSec.length();
 241       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 242
 243       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 244
 245       // Create the pipes
 246       int Pipes[2];
 247       if (pipe(Pipes) != 0)
 248          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 249       SetCloseExec(Pipes[0],true);
 250       SetCloseExec(Pipes[1],true);
 251
 252       // Purified Fork for running the script
 253       pid_t Process = ExecFork();
 254       if (Process == 0)
 255       {
 256          // Setup the FDs
 257          dup2(Pipes[0],STDIN_FILENO);
 258          SetCloseExec(STDOUT_FILENO,false);
 259          SetCloseExec(STDIN_FILENO,false);
 260          SetCloseExec(STDERR_FILENO,false);
 261
 262          const char *Args[4];
 263          Args[0] = "/bin/sh";
 264          Args[1] = "-c";
 265          Args[2] = Opts->Value.c_str();
 266          Args[3] = 0;
 267          execv(Args[0],(char **)Args);
 268          _exit(100);
 269       }
 270       close(Pipes[0]);
 271       FILE *F = fdopen(Pipes[1],"w");
 272       if (F == 0)
 273          return _error->Errno("fdopen","Faild to open new FD");
 274
 275       // Feed it the filenames.
 276       bool Die = false;
 277       if (Version <= 1)
 278       {
 279          for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 280          {
 281             // Only deal with packages to be installed from .deb
 282             if (I->Op != Item::Install)
 283                continue;
 284
 285             // No errors here..
 286             if (I->File[0] != '/')
 287                continue;
 288
 289             /* Feed the filename of each package that is pending install
 290                into the pipe. */
 291             fprintf(F,"%s\n",I->File.c_str());
 292             if (ferror(F) != 0)
 293             {
 294                Die = true;
 295                break;
 296             }
 297          }
 298       }
 299       else
 300          Die = !SendV2Pkgs(F);
 301
 302       fclose(F);
 303
 304       // Clean up the sub process
 305       if (ExecWait(Process,Opts->Value.c_str()) == false)
 306          return _error->Error("Failure running script %s",Opts->Value.c_str());
 307    }
 308
 309    return true;
 310 }
 311                                                                         /*}}}*/
 312 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 313 // ---------------------------------------------------------------------
 314 /*
 315 */
 316 void pkgDPkgPM::DoStdin(int master)
 317 {
 318    unsigned char input_buf[256] = {0,};
 319    ssize_t len = read(0, input_buf, sizeof(input_buf));
 320    if (len)
 321       write(master, input_buf, len);
 322    else
 323       stdin_is_dev_null = true;
 324 }
 325                                                                         /*}}}*/
 326 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 327 // ---------------------------------------------------------------------
 328 /*
 329  * read the terminal pty and write log
 330  */
 331 void pkgDPkgPM::DoTerminalPty(int master)
 332 {
 333    unsigned char term_buf[1024] = {0,0, };
 334
 335    ssize_t len=read(master, term_buf, sizeof(term_buf));
 336    if(len == -1 && errno == EIO)
 337    {
 338       // this happens when the child is about to exit, we
 339       // give it time to actually exit, otherwise we run
 340       // into a race
 341       usleep(500000);
 342       return;
 343    }
 344    if(len <= 0)
 345       return;
 346    write(1, term_buf, len);
 347    if(term_out)
 348       fwrite(term_buf, len, sizeof(char), term_out);
 349 }
 350                                                                         /*}}}*/
 351 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 352 // ---------------------------------------------------------------------
 353 /*
 354  */
 355 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 356 {
 357    // the status we output
 358    ostringstream status;
 359
 360    if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 361       std::clog << "got from dpkg '" << line << "'" << std::endl;
 362
 363
 364    /* dpkg sends strings like this:
 365       'status:   <pkg>:  <pkg  qstate>'
 366       errors look like this:
 367       '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
 368       and conffile-prompt like this
 369       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 370
 371       Newer versions of dpkg sent also:
 372       'processing: install: pkg'
 373       'processing: configure: pkg'
 374       'processing: remove: pkg'
 375       'processing: trigproc: trigger'
 376
 377    */
 378    char* list[6];
 379    //        dpkg sends multiline error messages sometimes (see
 380    //        #374195 for a example. we should support this by
 381    //        either patching dpkg to not send multiline over the
 382    //        statusfd or by rewriting the code here to deal with
 383    //        it. for now we just ignore it and not crash
 384    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 385    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 386    {
 387       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 388          std::clog << "ignoring line: not enough ':'" << std::endl;
 389       return;
 390    }
 391    char *pkg = list[1];
 392    char *action = _strstrip(list[2]);
 393
 394    // 'processing' from dpkg looks like
 395    // 'processing: action: pkg'
 396    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 397    {
 398       char s[200];
 399       char *pkg_or_trigger = _strstrip(list[2]);
 400       action =_strstrip( list[1]);
 401       const std::pair<const char *, const char *> * const iter =
 402         std::find_if(PackageProcessingOpsBegin,
 403                      PackageProcessingOpsEnd,
 404                      MatchProcessingOp(action));
 405       if(iter == PackageProcessingOpsEnd)
 406       {
 407          if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 408             std::clog << "ignoring unknwon action: " << action << std::endl;
 409          return;
 410       }
 411       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 412
 413       status << "pmstatus:" << pkg_or_trigger
 414              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 415              << ":" << s
 416              << endl;
 417       if(OutStatusFd > 0)
 418          write(OutStatusFd, status.str().c_str(), status.str().size());
 419       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 420          std::clog << "send: '" << status.str() << "'" << endl;
 421       return;
 422    }
 423
 424    if(strncmp(action,"error",strlen("error")) == 0)
 425    {
 426       // urgs, sometime has ":" in its error string so that we
 427       // end up with the error message split between list[3]
 428       // and list[4], e.g. the message:
 429       // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 430       // concat them again
 431       if( list[4] != NULL )
 432          list[3][strlen(list[3])] = ':';
 433
 434       status << "pmerror:" << list[1]
 435              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 436              << ":" << list[3]
 437              << endl;
 438       if(OutStatusFd > 0)
 439          write(OutStatusFd, status.str().c_str(), status.str().size());
 440       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 441          std::clog << "send: '" << status.str() << "'" << endl;
 442       pkgFailures++;
 443       WriteApportReport(list[1], list[3]);
 444       return;
 445    }
 446    if(strncmp(action,"conffile",strlen("conffile")) == 0)
 447    {
 448       status << "pmconffile:" << list[1]
 449              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 450              << ":" << list[3]
 451              << endl;
 452       if(OutStatusFd > 0)
 453          write(OutStatusFd, status.str().c_str(), status.str().size());
 454       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 455          std::clog << "send: '" << status.str() << "'" << endl;
 456       return;
 457    }
 458
 459    vector<struct DpkgState> &states = PackageOps[pkg];
 460    const char *next_action = NULL;
 461    if(PackageOpsDone[pkg] < states.size())
 462       next_action = states[PackageOpsDone[pkg]].state;
 463    // check if the package moved to the next dpkg state
 464    if(next_action && (strcmp(action, next_action) == 0))
 465    {
 466       // only read the translation if there is actually a next
 467       // action
 468       const char *translation = _(states[PackageOpsDone[pkg]].str);
 469       char s[200];
 470       snprintf(s, sizeof(s), translation, pkg);
 471
 472       // we moved from one dpkg state to a new one, report that
 473       PackageOpsDone[pkg]++;
 474       PackagesDone++;
 475       // build the status str
 476       status << "pmstatus:" << pkg
 477              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 478              << ":" << s
 479              << endl;
 480       if(OutStatusFd > 0)
 481          write(OutStatusFd, status.str().c_str(), status.str().size());
 482       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 483          std::clog << "send: '" << status.str() << "'" << endl;
 484    }
 485    if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 486       std::clog << "(parsed from dpkg) pkg: " << pkg
 487                 << " action: " << action << endl;
 488 }
 489
 490 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 491 // ---------------------------------------------------------------------
 492 /*
 493  */
 494 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 495 {
 496    char *p, *q;
 497    int len;
 498
 499    len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
 500    dpkgbuf_pos += len;
 501    if(len <= 0)
 502       return;
 503
 504    // process line by line if we have a buffer
 505    p = q = dpkgbuf;
 506    while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
 507    {
 508       *q = 0;
 509       ProcessDpkgStatusLine(OutStatusFd, p);
 510       p=q+1; // continue with next line
 511    }
 512
 513    // now move the unprocessed bits (after the final \n that is now a 0x0)
 514    // to the start and update dpkgbuf_pos
 515    p = (char*)memrchr(dpkgbuf, 0, dpkgbuf_pos);
 516    if(p == NULL)
 517       return;
 518
 519    // we are interessted in the first char *after* 0x0
 520    p++;
 521
 522    // move the unprocessed tail to the start and update pos
 523    memmove(dpkgbuf, p, p-dpkgbuf);
 524    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 525 }
 526                                                                         /*}}}*/
 527
 528 bool pkgDPkgPM::OpenLog()
 529 {
 530    string logdir = _config->FindDir("Dir::Log");
 531    if(not FileExists(logdir))
 532       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 533    string logfile_name = flCombine(logdir,
 534                                    _config->Find("Dir::Log::Terminal"));
 535    if (!logfile_name.empty())
 536    {
 537       term_out = fopen(logfile_name.c_str(),"a");
 538       chmod(logfile_name.c_str(), 0600);
 539       // output current time
 540       char outstr[200];
 541       time_t t = time(NULL);
 542       struct tm *tmp = localtime(&t);
 543       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 544       fprintf(term_out, "\nLog started: ");
 545       fprintf(term_out, "%s", outstr);
 546       fprintf(term_out, "\n");
 547    }
 548    return true;
 549 }
 550
 551 bool pkgDPkgPM::CloseLog()
 552 {
 553    if(term_out)
 554    {
 555       char outstr[200];
 556       time_t t = time(NULL);
 557       struct tm *tmp = localtime(&t);
 558       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 559       fprintf(term_out, "Log ended: ");
 560       fprintf(term_out, "%s", outstr);
 561       fprintf(term_out, "\n");
 562       fclose(term_out);
 563    }
 564    term_out = NULL;
 565    return true;
 566 }
 567
 568 /*{{{*/
 569 // This implements a racy version of pselect for those architectures
 570 // that don't have a working implementation.
 571 // FIXME: Probably can be removed on Lenny+1
 572 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 573    fd_set *exceptfds, const struct timespec *timeout,
 574    const sigset_t *sigmask)
 575 {
 576    sigset_t origmask;
 577    struct timeval tv;
 578    int retval;
 579
 580    tv.tv_sec = timeout->tv_sec;
 581    tv.tv_usec = timeout->tv_nsec/1000;
 582
 583    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 584    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 585    sigprocmask(SIG_SETMASK, &origmask, 0);
 586    return retval;
 587 }
 588 /*}}}*/
 589
 590 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 591 // ---------------------------------------------------------------------
 592 /* This globs the operations and calls dpkg
 593  *
 594  * If it is called with "OutStatusFd" set to a valid file descriptor
 595  * apt will report the install progress over this fd. It maps the
 596  * dpkg states a package goes through to human readable (and i10n-able)
 597  * names and calculates a percentage for each step.
 598 */
 599 bool pkgDPkgPM::Go(int OutStatusFd)
 600 {
 601    fd_set rfds;
 602    struct timespec tv;
 603    sigset_t sigmask;
 604    sigset_t original_sigmask;
 605
 606    unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 607    unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 608    bool NoTriggers = _config->FindB("DPkg::NoTriggers",false);
 609
 610    if (RunScripts("DPkg::Pre-Invoke") == false)
 611       return false;
 612
 613    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 614       return false;
 615
 616    // map the dpkg states to the operations that are performed
 617    // (this is sorted in the same way as Item::Ops)
 618    static const struct DpkgState DpkgStatesOpMap[][7] = {
 619       // Install operation
 620       {
 621          {"half-installed", N_("Preparing %s")},
 622          {"unpacked", N_("Unpacking %s") },
 623          {NULL, NULL}
 624       },
 625       // Configure operation
 626       {
 627          {"unpacked",N_("Preparing to configure %s") },
 628          {"half-configured", N_("Configuring %s") },
 629 #if 0
 630          {"triggers-awaited", N_("Processing triggers for %s") },
 631          {"triggers-pending", N_("Processing triggers for %s") },
 632 #endif
 633          { "installed", N_("Installed %s")},
 634          {NULL, NULL}
 635       },
 636       // Remove operation
 637       {
 638          {"half-configured", N_("Preparing for removal of %s")},
 639 #if 0
 640          {"triggers-awaited", N_("Preparing for removal of %s")},
 641          {"triggers-pending", N_("Preparing for removal of %s")},
 642 #endif
 643          {"half-installed", N_("Removing %s")},
 644          {"config-files",  N_("Removed %s")},
 645          {NULL, NULL}
 646       },
 647       // Purge operation
 648       {
 649          {"config-files", N_("Preparing to completely remove %s")},
 650          {"not-installed", N_("Completely removed %s")},
 651          {NULL, NULL}
 652       },
 653    };
 654
 655    // init the PackageOps map, go over the list of packages that
 656    // that will be [installed|configured|removed|purged] and add
 657    // them to the PackageOps map (the dpkg states it goes through)
 658    // and the PackageOpsTranslations (human readable strings)
 659    for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
 660    {
 661       string name = (*I).Pkg.Name();
 662       PackageOpsDone[name] = 0;
 663       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 664       {
 665          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 666          PackagesTotal++;
 667       }
 668    }
 669
 670    stdin_is_dev_null = false;
 671
 672    // create log
 673    OpenLog();
 674
 675    // this loop is runs once per operation
 676    for (vector<Item>::iterator I = List.begin(); I != List.end();)
 677    {
 678       vector<Item>::iterator J = I;
 679       for (; J != List.end() && J->Op == I->Op; J++);
 680
 681       // Generate the argument list
 682       const char *Args[MaxArgs + 50];
 683       if (J - I > (signed)MaxArgs)
 684          J = I + MaxArgs;
 685
 686       unsigned int n = 0;
 687       unsigned long Size = 0;
 688       string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 689       Args[n++] = Tmp.c_str();
 690       Size += strlen(Args[n-1]);
 691
 692       // Stick in any custom dpkg options
 693       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 694       if (Opts != 0)
 695       {
 696          Opts = Opts->Child;
 697          for (; Opts != 0; Opts = Opts->Next)
 698          {
 699             if (Opts->Value.empty() == true)
 700                continue;
 701             Args[n++] = Opts->Value.c_str();
 702             Size += Opts->Value.length();
 703          }
 704       }
 705
 706       char status_fd_buf[20];
 707       int fd[2];
 708       pipe(fd);
 709
 710       Args[n++] = "--status-fd";
 711       Size += strlen(Args[n-1]);
 712       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 713       Args[n++] = status_fd_buf;
 714       Size += strlen(Args[n-1]);
 715
 716       switch (I->Op)
 717       {
 718          case Item::Remove:
 719          Args[n++] = "--force-depends";
 720          Size += strlen(Args[n-1]);
 721          Args[n++] = "--force-remove-essential";
 722          Size += strlen(Args[n-1]);
 723          Args[n++] = "--remove";
 724          Size += strlen(Args[n-1]);
 725          break;
 726
 727          case Item::Purge:
 728          Args[n++] = "--force-depends";
 729          Size += strlen(Args[n-1]);
 730          Args[n++] = "--force-remove-essential";
 731          Size += strlen(Args[n-1]);
 732          Args[n++] = "--purge";
 733          Size += strlen(Args[n-1]);
 734          break;
 735
 736          case Item::Configure:
 737          Args[n++] = "--configure";
 738          if (NoTriggers)
 739             Args[n++] = "--no-triggers";
 740          Size += strlen(Args[n-1]);
 741          break;
 742
 743          case Item::Install:
 744          Args[n++] = "--unpack";
 745          Size += strlen(Args[n-1]);
 746          Args[n++] = "--auto-deconfigure";
 747          Size += strlen(Args[n-1]);
 748          break;
 749       }
 750
 751       // Write in the file or package names
 752       if (I->Op == Item::Install)
 753       {
 754          for (;I != J && Size < MaxArgBytes; I++)
 755          {
 756             if (I->File[0] != '/')
 757                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
 758             Args[n++] = I->File.c_str();
 759             Size += strlen(Args[n-1]);
 760          }
 761       }
 762       else
 763       {
 764          for (;I != J && Size < MaxArgBytes; I++)
 765          {
 766             Args[n++] = I->Pkg.Name();
 767             Size += strlen(Args[n-1]);
 768          }
 769       }
 770       Args[n] = 0;
 771       J = I;
 772
 773       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
 774       {
 775          for (unsigned int k = 0; k != n; k++)
 776             clog << Args[k] << ' ';
 777          clog << endl;
 778          continue;
 779       }
 780
 781       cout << flush;
 782       clog << flush;
 783       cerr << flush;
 784
 785       /* Mask off sig int/quit. We do this because dpkg also does when
 786          it forks scripts. What happens is that when you hit ctrl-c it sends
 787          it to all processes in the group. Since dpkg ignores the signal
 788          it doesn't die but we do! So we must also ignore it */
 789       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
 790       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 791
 792       // ignore SIGHUP as well (debian #463030)
 793       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
 794
 795       struct    termios tt;
 796       struct    termios tt_out;
 797       struct    winsize win;
 798       int       master;
 799       int       slave;
 800
 801       // FIXME: setup sensible signal handling (*ick*)
 802       tcgetattr(0, &tt);
 803       tcgetattr(1, &tt_out);
 804       ioctl(0, TIOCGWINSZ, (char *)&win);
 805       if (openpty(&master, &slave, NULL, &tt_out, &win) < 0)
 806       {
 807          const char *s = _("Can not write log, openpty() "
 808                            "failed (/dev/pts not mounted?)\n");
 809          fprintf(stderr, "%s",s);
 810          fprintf(term_out, "%s",s);
 811          master = slave = -1;
 812       }  else {
 813          struct termios rtt;
 814          rtt = tt;
 815          cfmakeraw(&rtt);
 816          rtt.c_lflag &= ~ECHO;
 817          // block SIGTTOU during tcsetattr to prevent a hang if
 818          // the process is a member of the background process group
 819          // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
 820          sigemptyset(&sigmask);
 821          sigaddset(&sigmask, SIGTTOU);
 822          sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
 823          tcsetattr(0, TCSAFLUSH, &rtt);
 824          sigprocmask(SIG_SETMASK, &original_sigmask, 0);
 825       }
 826
 827        // Fork dpkg
 828       pid_t Child;
 829       _config->Set("APT::Keep-Fds::",fd[1]);
 830       Child = ExecFork();
 831
 832       // This is the child
 833       if (Child == 0)
 834       {
 835          if(slave >= 0 && master >= 0)
 836          {
 837             setsid();
 838             ioctl(slave, TIOCSCTTY, 0);
 839             close(master);
 840             dup2(slave, 0);
 841             dup2(slave, 1);
 842             dup2(slave, 2);
 843             close(slave);
 844          }
 845          close(fd[0]); // close the read end of the pipe
 846
 847          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
 848             _exit(100);
 849
 850          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
 851          {
 852             int Flags,dummy;
 853             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
 854                _exit(100);
 855
 856             // Discard everything in stdin before forking dpkg
 857             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
 858                _exit(100);
 859
 860             while (read(STDIN_FILENO,&dummy,1) == 1);
 861
 862             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
 863                _exit(100);
 864          }
 865
 866
 867          /* No Job Control Stop Env is a magic dpkg var that prevents it
 868             from using sigstop */
 869          putenv((char *)"DPKG_NO_TSTP=yes");
 870          execvp(Args[0],(char **)Args);
 871          cerr << "Could not exec dpkg!" << endl;
 872          _exit(100);
 873       }
 874
 875       // clear the Keep-Fd again
 876       _config->Clear("APT::Keep-Fds",fd[1]);
 877
 878       // Wait for dpkg
 879       int Status = 0;
 880
 881       // we read from dpkg here
 882       int _dpkgin = fd[0];
 883       close(fd[1]);                        // close the write end of the pipe
 884
 885       // the result of the waitpid call
 886       int res;
 887       if(slave > 0)
 888          close(slave);
 889
 890       // setups fds
 891       sigemptyset(&sigmask);
 892       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
 893
 894       int select_ret;
 895       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
 896          if(res < 0) {
 897             // FIXME: move this to a function or something, looks ugly here
 898             // error handling, waitpid returned -1
 899             if (errno == EINTR)
 900                continue;
 901             RunScripts("DPkg::Post-Invoke");
 902
 903             // Restore sig int/quit
 904             signal(SIGQUIT,old_SIGQUIT);
 905             signal(SIGINT,old_SIGINT);
 906             signal(SIGHUP,old_SIGHUP);
 907             return _error->Errno("waitpid","Couldn't wait for subprocess");
 908          }
 909          // wait for input or output here
 910          FD_ZERO(&rfds);
 911          if (!stdin_is_dev_null)
 912             FD_SET(0, &rfds);
 913          FD_SET(_dpkgin, &rfds);
 914          if(master >= 0)
 915             FD_SET(master, &rfds);
 916          tv.tv_sec = 1;
 917          tv.tv_nsec = 0;
 918          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
 919                               &tv, &original_sigmask);
 920          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
 921             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
 922                                       NULL, &tv, &original_sigmask);
 923          if (select_ret == 0)
 924             continue;
 925          else if (select_ret < 0 && errno == EINTR)
 926             continue;
 927          else if (select_ret < 0)
 928          {
 929             perror("select() returned error");
 930             continue;
 931          }
 932
 933          if(master >= 0 && FD_ISSET(master, &rfds))
 934             DoTerminalPty(master);
 935          if(master >= 0 && FD_ISSET(0, &rfds))
 936             DoStdin(master);
 937          if(FD_ISSET(_dpkgin, &rfds))
 938             DoDpkgStatusFd(_dpkgin, OutStatusFd);
 939       }
 940       close(_dpkgin);
 941
 942       // Restore sig int/quit
 943       signal(SIGQUIT,old_SIGQUIT);
 944       signal(SIGINT,old_SIGINT);
 945       signal(SIGHUP,old_SIGHUP);
 946
 947       if(master >= 0)
 948       {
 949          tcsetattr(0, TCSAFLUSH, &tt);
 950          close(master);
 951       }
 952
 953       // Check for an error code.
 954       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
 955       {
 956          // if it was set to "keep-dpkg-runing" then we won't return
 957          // here but keep the loop going and just report it as a error
 958          // for later
 959          bool stopOnError = _config->FindB("Dpkg::StopOnError",true);
 960
 961          if(stopOnError)
 962             RunScripts("DPkg::Post-Invoke");
 963
 964          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
 965             _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
 966          else if (WIFEXITED(Status) != 0)
 967             _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
 968          else
 969             _error->Error("Sub-process %s exited unexpectedly",Args[0]);
 970
 971          if(stopOnError)
 972          {
 973             CloseLog();
 974             return false;
 975          }
 976       }
 977    }
 978    CloseLog();
 979
 980    if (RunScripts("DPkg::Post-Invoke") == false)
 981       return false;
 982
 983    Cache.writeStateFile(NULL);
 984    return true;
 985 }
 986                                                                         /*}}}*/
 987 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
 988 // ---------------------------------------------------------------------
 989 /* */
 990 void pkgDPkgPM::Reset()
 991 {
 992    List.erase(List.begin(),List.end());
 993 }
 994                                                                         /*}}}*/
 995 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
 996 // ---------------------------------------------------------------------
 997 /* */
 998 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
 999 {
1000    string pkgname, reportfile, srcpkgname, pkgver, arch;
1001    string::size_type pos;
1002    FILE *report;
1003
1004    if (_config->FindB("Dpkg::ApportFailureReport",true) == false)
1005    {
1006       std::clog << "configured to not write apport reports" << std::endl;
1007       return;
1008    }
1009
1010    // only report the first errors
1011    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1012    {
1013       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1014       return;
1015    }
1016
1017    // check if its not a follow up error
1018    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1019    if(strstr(errormsg, needle) != NULL) {
1020       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1021       return;
1022    }
1023
1024    // do not report disk-full failures
1025    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1026       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1027       return;
1028    }
1029
1030    // do not report out-of-memory failures
1031    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1032       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1033       return;
1034    }
1035
1036    // get the pkgname and reportfile
1037    pkgname = flNotDir(pkgpath);
1038    pos = pkgname.find('_');
1039    if(pos != string::npos)
1040       pkgname = pkgname.substr(0, pos);
1041
1042    // find the package versin and source package name
1043    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1044    if (Pkg.end() == true)
1045       return;
1046    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1047    if (Ver.end() == true)
1048       return;
1049    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1050    pkgRecords Recs(Cache);
1051    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1052    srcpkgname = Parse.SourcePkg();
1053    if(srcpkgname.empty())
1054       srcpkgname = pkgname;
1055
1056    // if the file exists already, we check:
1057    // - if it was reported already (touched by apport).
1058    //   If not, we do nothing, otherwise
1059    //    we overwrite it. This is the same behaviour as apport
1060    // - if we have a report with the same pkgversion already
1061    //   then we skip it
1062    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1063    if(FileExists(reportfile))
1064    {
1065       struct stat buf;
1066       char strbuf[255];
1067
1068       // check atime/mtime
1069       stat(reportfile.c_str(), &buf);
1070       if(buf.st_mtime > buf.st_atime)
1071          return;
1072
1073       // check if the existing report is the same version
1074       report = fopen(reportfile.c_str(),"r");
1075       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1076       {
1077          if(strstr(strbuf,"Package:") == strbuf)
1078          {
1079             char pkgname[255], version[255];
1080             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
1081                if(strcmp(pkgver.c_str(), version) == 0)
1082                {
1083                   fclose(report);
1084                   return;
1085                }
1086          }
1087       }
1088       fclose(report);
1089    }
1090
1091    // now write the report
1092    arch = _config->Find("APT::Architecture");
1093    report = fopen(reportfile.c_str(),"w");
1094    if(report == NULL)
1095       return;
1096    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1097       chmod(reportfile.c_str(), 0);
1098    else
1099       chmod(reportfile.c_str(), 0600);
1100    fprintf(report, "ProblemType: Package\n");
1101    fprintf(report, "Architecture: %s\n", arch.c_str());
1102    time_t now = time(NULL);
1103    fprintf(report, "Date: %s" , ctime(&now));
1104    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1105    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1106    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1107
1108    // ensure that the log is flushed
1109    if(term_out)
1110       fflush(term_out);
1111
1112    // attach terminal log it if we have it
1113    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1114    if (!logfile_name.empty())
1115    {
1116       FILE *log = NULL;
1117       char buf[1024];
1118
1119       fprintf(report, "DpkgTerminalLog:\n");
1120       log = fopen(logfile_name.c_str(),"r");
1121       if(log != NULL)
1122       {
1123          while( fgets(buf, sizeof(buf), log) != NULL)
1124             fprintf(report, " %s", buf);
1125          fclose(log);
1126       }
1127    }
1128    fclose(report);
1129 }
1130                                                                         /*}}}*/