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