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 #include <apti18n.h>
  17 #include <apt-pkg/fileutl.h>
  18
  19 #include <unistd.h>
  20 #include <stdlib.h>
  21 #include <fcntl.h>
  22 #include <sys/select.h>
  23 #include <sys/types.h>
  24 #include <sys/wait.h>
  25 #include <signal.h>
  26 #include <errno.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <algorithm>
  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 namespace
  45 {
  46   // Maps the dpkg "processing" info to human readable names.  Entry 0
  47   // of each array is the key, entry 1 is the value.
  48   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  49     std::make_pair("install",   N_("Installing %s")),
  50     std::make_pair("configure", N_("Configuring %s")),
  51     std::make_pair("remove",    N_("Removing %s")),
  52     std::make_pair("purge",    N_("Completely removing %s")),
  53     std::make_pair("disappear", N_("Noting disappearance of %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 /* helper function to ionice the given PID
  80
  81  there is no C header for ionice yet - just the syscall interface
  82  so we use the binary from util-linux
  83 */
  84 static bool
  85 ionice(int PID)
  86 {
  87    if (!FileExists("/usr/bin/ionice"))
  88       return false;
  89    pid_t Process = ExecFork();
  90    if (Process == 0)
  91    {
  92       char buf[32];
  93       snprintf(buf, sizeof(buf), "-p%d", PID);
  94       const char *Args[4];
  95       Args[0] = "/usr/bin/ionice";
  96       Args[1] = "-c3";
  97       Args[2] = buf;
  98       Args[3] = 0;
  99       execv(Args[0], (char **)Args);
 100    }
 101    return ExecWait(Process, "ionice");
 102 }
 103
 104 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 105 // ---------------------------------------------------------------------
 106 /* */
 107 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 108    : pkgPackageManager(Cache), dpkgbuf_pos(0),
 109      term_out(NULL), history_out(NULL), PackagesDone(0), PackagesTotal(0)
 110 {
 111 }
 112                                                                         /*}}}*/
 113 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 114 // ---------------------------------------------------------------------
 115 /* */
 116 pkgDPkgPM::~pkgDPkgPM()
 117 {
 118 }
 119                                                                         /*}}}*/
 120 // DPkgPM::Install - Install a package                                  /*{{{*/
 121 // ---------------------------------------------------------------------
 122 /* Add an install operation to the sequence list */
 123 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 124 {
 125    if (File.empty() == true || Pkg.end() == true)
 126       return _error->Error("Internal Error, No file name for %s",Pkg.Name());
 127
 128    // If the filename string begins with DPkg::Chroot-Directory, return the
 129    // substr that is within the chroot so dpkg can access it.
 130    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 131    if (chrootdir != "/" && File.find(chrootdir) == 0)
 132    {
 133       size_t len = chrootdir.length();
 134       if (chrootdir.at(len - 1) == '/')
 135         len--;
 136       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 137    }
 138    else
 139       List.push_back(Item(Item::Install,Pkg,File));
 140
 141    return true;
 142 }
 143                                                                         /*}}}*/
 144 // DPkgPM::Configure - Configure a package                              /*{{{*/
 145 // ---------------------------------------------------------------------
 146 /* Add a configure operation to the sequence list */
 147 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 148 {
 149    if (Pkg.end() == true)
 150       return false;
 151
 152    List.push_back(Item(Item::Configure, Pkg));
 153
 154    // Use triggers for config calls if we configure "smart"
 155    // as otherwise Pre-Depends will not be satisfied, see #526774
 156    if (_config->FindB("DPkg::TriggersPending", false) == true)
 157       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 158
 159    return true;
 160 }
 161                                                                         /*}}}*/
 162 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 163 // ---------------------------------------------------------------------
 164 /* Add a remove operation to the sequence list */
 165 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 166 {
 167    if (Pkg.end() == true)
 168       return false;
 169
 170    if (Purge == true)
 171       List.push_back(Item(Item::Purge,Pkg));
 172    else
 173       List.push_back(Item(Item::Remove,Pkg));
 174    return true;
 175 }
 176                                                                         /*}}}*/
 177 // DPkgPM::SendV2Pkgs - Send version 2 package info                     /*{{{*/
 178 // ---------------------------------------------------------------------
 179 /* This is part of the helper script communication interface, it sends
 180    very complete information down to the other end of the pipe.*/
 181 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 182 {
 183    fprintf(F,"VERSION 2\n");
 184
 185    /* Write out all of the configuration directives by walking the
 186       configuration tree */
 187    const Configuration::Item *Top = _config->Tree(0);
 188    for (; Top != 0;)
 189    {
 190       if (Top->Value.empty() == false)
 191       {
 192          fprintf(F,"%s=%s\n",
 193                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 194                  QuoteString(Top->Value,"\n").c_str());
 195       }
 196
 197       if (Top->Child != 0)
 198       {
 199          Top = Top->Child;
 200          continue;
 201       }
 202
 203       while (Top != 0 && Top->Next == 0)
 204          Top = Top->Parent;
 205       if (Top != 0)
 206          Top = Top->Next;
 207    }
 208    fprintf(F,"\n");
 209
 210    // Write out the package actions in order.
 211    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 212    {
 213       if(I->Pkg.end() == true)
 214          continue;
 215
 216       pkgDepCache::StateCache &S = Cache[I->Pkg];
 217
 218       fprintf(F,"%s ",I->Pkg.Name());
 219       // Current version
 220       if (I->Pkg->CurrentVer == 0)
 221          fprintf(F,"- ");
 222       else
 223          fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
 224
 225       // Show the compare operator
 226       // Target version
 227       if (S.InstallVer != 0)
 228       {
 229          int Comp = 2;
 230          if (I->Pkg->CurrentVer != 0)
 231             Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
 232          if (Comp < 0)
 233             fprintf(F,"> ");
 234          if (Comp == 0)
 235             fprintf(F,"= ");
 236          if (Comp > 0)
 237             fprintf(F,"< ");
 238          fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
 239       }
 240       else
 241          fprintf(F,"> - ");
 242
 243       // Show the filename/operation
 244       if (I->Op == Item::Install)
 245       {
 246          // No errors here..
 247          if (I->File[0] != '/')
 248             fprintf(F,"**ERROR**\n");
 249          else
 250             fprintf(F,"%s\n",I->File.c_str());
 251       }
 252       if (I->Op == Item::Configure)
 253          fprintf(F,"**CONFIGURE**\n");
 254       if (I->Op == Item::Remove ||
 255           I->Op == Item::Purge)
 256          fprintf(F,"**REMOVE**\n");
 257
 258       if (ferror(F) != 0)
 259          return false;
 260    }
 261    return true;
 262 }
 263                                                                         /*}}}*/
 264 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 265 // ---------------------------------------------------------------------
 266 /* This looks for a list of scripts to run from the configuration file
 267    each one is run and is fed on standard input a list of all .deb files
 268    that are due to be installed. */
 269 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 270 {
 271    Configuration::Item const *Opts = _config->Tree(Cnf);
 272    if (Opts == 0 || Opts->Child == 0)
 273       return true;
 274    Opts = Opts->Child;
 275
 276    unsigned int Count = 1;
 277    for (; Opts != 0; Opts = Opts->Next, Count++)
 278    {
 279       if (Opts->Value.empty() == true)
 280          continue;
 281
 282       // Determine the protocol version
 283       string OptSec = Opts->Value;
 284       string::size_type Pos;
 285       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 286          Pos = OptSec.length();
 287       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 288
 289       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 290
 291       // Create the pipes
 292       int Pipes[2];
 293       if (pipe(Pipes) != 0)
 294          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 295       SetCloseExec(Pipes[0],true);
 296       SetCloseExec(Pipes[1],true);
 297
 298       // Purified Fork for running the script
 299       pid_t Process = ExecFork();
 300       if (Process == 0)
 301       {
 302          // Setup the FDs
 303          dup2(Pipes[0],STDIN_FILENO);
 304          SetCloseExec(STDOUT_FILENO,false);
 305          SetCloseExec(STDIN_FILENO,false);
 306          SetCloseExec(STDERR_FILENO,false);
 307
 308          const char *Args[4];
 309          Args[0] = "/bin/sh";
 310          Args[1] = "-c";
 311          Args[2] = Opts->Value.c_str();
 312          Args[3] = 0;
 313          execv(Args[0],(char **)Args);
 314          _exit(100);
 315       }
 316       close(Pipes[0]);
 317       FILE *F = fdopen(Pipes[1],"w");
 318       if (F == 0)
 319          return _error->Errno("fdopen","Faild to open new FD");
 320
 321       // Feed it the filenames.
 322       bool Die = false;
 323       if (Version <= 1)
 324       {
 325          for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 326          {
 327             // Only deal with packages to be installed from .deb
 328             if (I->Op != Item::Install)
 329                continue;
 330
 331             // No errors here..
 332             if (I->File[0] != '/')
 333                continue;
 334
 335             /* Feed the filename of each package that is pending install
 336                into the pipe. */
 337             fprintf(F,"%s\n",I->File.c_str());
 338             if (ferror(F) != 0)
 339             {
 340                Die = true;
 341                break;
 342             }
 343          }
 344       }
 345       else
 346          Die = !SendV2Pkgs(F);
 347
 348       fclose(F);
 349
 350       // Clean up the sub process
 351       if (ExecWait(Process,Opts->Value.c_str()) == false)
 352          return _error->Error("Failure running script %s",Opts->Value.c_str());
 353    }
 354
 355    return true;
 356 }
 357
 358                                                                         /*}}}*/
 359 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 360 // ---------------------------------------------------------------------
 361 /*
 362 */
 363 void pkgDPkgPM::DoStdin(int master)
 364 {
 365    unsigned char input_buf[256] = {0,};
 366    ssize_t len = read(0, input_buf, sizeof(input_buf));
 367    if (len)
 368       write(master, input_buf, len);
 369    else
 370       stdin_is_dev_null = true;
 371 }
 372                                                                         /*}}}*/
 373 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 374 // ---------------------------------------------------------------------
 375 /*
 376  * read the terminal pty and write log
 377  */
 378 void pkgDPkgPM::DoTerminalPty(int master)
 379 {
 380    unsigned char term_buf[1024] = {0,0, };
 381
 382    ssize_t len=read(master, term_buf, sizeof(term_buf));
 383    if(len == -1 && errno == EIO)
 384    {
 385       // this happens when the child is about to exit, we
 386       // give it time to actually exit, otherwise we run
 387       // into a race
 388       usleep(500000);
 389       return;
 390    }
 391    if(len <= 0)
 392       return;
 393    write(1, term_buf, len);
 394    if(term_out)
 395       fwrite(term_buf, len, sizeof(char), term_out);
 396 }
 397                                                                         /*}}}*/
 398 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 399 // ---------------------------------------------------------------------
 400 /*
 401  */
 402 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 403 {
 404    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 405    // the status we output
 406    ostringstream status;
 407
 408    if (Debug == true)
 409       std::clog << "got from dpkg '" << line << "'" << std::endl;
 410
 411
 412    /* dpkg sends strings like this:
 413       'status:   <pkg>:  <pkg  qstate>'
 414       errors look like this:
 415       '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
 416       and conffile-prompt like this
 417       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 418
 419       Newer versions of dpkg sent also:
 420       'processing: install: pkg'
 421       'processing: configure: pkg'
 422       'processing: remove: pkg'
 423       'processing: purge: pkg'
 424       'processing: disappear: pkg'
 425       'processing: trigproc: trigger'
 426
 427    */
 428    char* list[5];
 429    //        dpkg sends multiline error messages sometimes (see
 430    //        #374195 for a example. we should support this by
 431    //        either patching dpkg to not send multiline over the
 432    //        statusfd or by rewriting the code here to deal with
 433    //        it. for now we just ignore it and not crash
 434    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 435    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 436    {
 437       if (Debug == true)
 438          std::clog << "ignoring line: not enough ':'" << std::endl;
 439       return;
 440    }
 441    const char* const pkg = list[1];
 442    const char* action = _strstrip(list[2]);
 443
 444    // 'processing' from dpkg looks like
 445    // 'processing: action: pkg'
 446    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 447    {
 448       char s[200];
 449       const char* const pkg_or_trigger = _strstrip(list[2]);
 450       action = _strstrip( list[1]);
 451       const std::pair<const char *, const char *> * const iter =
 452         std::find_if(PackageProcessingOpsBegin,
 453                      PackageProcessingOpsEnd,
 454                      MatchProcessingOp(action));
 455       if(iter == PackageProcessingOpsEnd)
 456       {
 457          if (Debug == true)
 458             std::clog << "ignoring unknown action: " << action << std::endl;
 459          return;
 460       }
 461       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 462
 463       status << "pmstatus:" << pkg_or_trigger
 464              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 465              << ":" << s
 466              << endl;
 467       if(OutStatusFd > 0)
 468          write(OutStatusFd, status.str().c_str(), status.str().size());
 469       if (Debug == true)
 470          std::clog << "send: '" << status.str() << "'" << endl;
 471
 472       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 473          disappearedPkgs.insert(string(pkg_or_trigger));
 474       return;
 475    }
 476
 477    if(strncmp(action,"error",strlen("error")) == 0)
 478    {
 479       status << "pmerror:" << list[1]
 480              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 481              << ":" << list[3]
 482              << endl;
 483       if(OutStatusFd > 0)
 484          write(OutStatusFd, status.str().c_str(), status.str().size());
 485       if (Debug == true)
 486          std::clog << "send: '" << status.str() << "'" << endl;
 487       return;
 488    }
 489    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 490    {
 491       status << "pmconffile:" << list[1]
 492              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 493              << ":" << list[3]
 494              << endl;
 495       if(OutStatusFd > 0)
 496          write(OutStatusFd, status.str().c_str(), status.str().size());
 497       if (Debug == true)
 498          std::clog << "send: '" << status.str() << "'" << endl;
 499       return;
 500    }
 501
 502    vector<struct DpkgState> const &states = PackageOps[pkg];
 503    const char *next_action = NULL;
 504    if(PackageOpsDone[pkg] < states.size())
 505       next_action = states[PackageOpsDone[pkg]].state;
 506    // check if the package moved to the next dpkg state
 507    if(next_action && (strcmp(action, next_action) == 0))
 508    {
 509       // only read the translation if there is actually a next
 510       // action
 511       const char *translation = _(states[PackageOpsDone[pkg]].str);
 512       char s[200];
 513       snprintf(s, sizeof(s), translation, pkg);
 514
 515       // we moved from one dpkg state to a new one, report that
 516       PackageOpsDone[pkg]++;
 517       PackagesDone++;
 518       // build the status str
 519       status << "pmstatus:" << pkg
 520              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 521              << ":" << s
 522              << endl;
 523       if(OutStatusFd > 0)
 524          write(OutStatusFd, status.str().c_str(), status.str().size());
 525       if (Debug == true)
 526          std::clog << "send: '" << status.str() << "'" << endl;
 527    }
 528    if (Debug == true)
 529       std::clog << "(parsed from dpkg) pkg: " << pkg
 530                 << " action: " << action << endl;
 531 }
 532                                                                         /*}}}*/
 533 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 534 // ---------------------------------------------------------------------
 535 /*
 536  */
 537 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 538 {
 539    char *p, *q;
 540    int len;
 541
 542    len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
 543    dpkgbuf_pos += len;
 544    if(len <= 0)
 545       return;
 546
 547    // process line by line if we have a buffer
 548    p = q = dpkgbuf;
 549    while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
 550    {
 551       *q = 0;
 552       ProcessDpkgStatusLine(OutStatusFd, p);
 553       p=q+1; // continue with next line
 554    }
 555
 556    // now move the unprocessed bits (after the final \n that is now a 0x0)
 557    // to the start and update dpkgbuf_pos
 558    p = (char*)memrchr(dpkgbuf, 0, dpkgbuf_pos);
 559    if(p == NULL)
 560       return;
 561
 562    // we are interessted in the first char *after* 0x0
 563    p++;
 564
 565    // move the unprocessed tail to the start and update pos
 566    memmove(dpkgbuf, p, p-dpkgbuf);
 567    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 568 }
 569                                                                         /*}}}*/
 570 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 571 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 572 {
 573    size_t const length = value.length();
 574    if (length == 0)
 575       return;
 576    // poor mans rstrip(", ")
 577    if (value[length-2] == ',' && value[length-1] == ' ')
 578       value.erase(length - 2, 2);
 579    fprintf(history_out, "%s: %s\n", tag.c_str(), value.c_str());
 580 }                                                                       /*}}}*/
 581 // DPkgPM::OpenLog                                                      /*{{{*/
 582 bool pkgDPkgPM::OpenLog()
 583 {
 584    string const logdir = _config->FindDir("Dir::Log");
 585    if(not FileExists(logdir))
 586       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 587
 588    // get current time
 589    char timestr[200];
 590    time_t const t = time(NULL);
 591    struct tm const * const tmp = localtime(&t);
 592    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 593
 594    // open terminal log
 595    string const logfile_name = flCombine(logdir,
 596                                    _config->Find("Dir::Log::Terminal"));
 597    if (!logfile_name.empty())
 598    {
 599       term_out = fopen(logfile_name.c_str(),"a");
 600       if (term_out == NULL)
 601          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 602
 603       chmod(logfile_name.c_str(), 0600);
 604       fprintf(term_out, "\nLog started: %s\n", timestr);
 605    }
 606
 607    // write your history
 608    string const history_name = flCombine(logdir,
 609                                    _config->Find("Dir::Log::History"));
 610    if (!history_name.empty())
 611    {
 612       history_out = fopen(history_name.c_str(),"a");
 613       if (history_out == NULL)
 614          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 615       chmod(history_name.c_str(), 0644);
 616       fprintf(history_out, "\nStart-Date: %s\n", timestr);
 617       string remove, purge, install, upgrade, downgrade;
 618       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
 619       {
 620          if (Cache[I].NewInstall())
 621             install += I.Name() + string(" (") + Cache[I].CandVersion + string("), ");
 622          else if (Cache[I].Upgrade())
 623             upgrade += I.Name() + string(" (") + Cache[I].CurVersion + string(", ") + Cache[I].CandVersion + string("), ");
 624          else if (Cache[I].Downgrade())
 625             downgrade += I.Name() + string(" (") + Cache[I].CurVersion + string(", ") + Cache[I].CandVersion + string("), ");
 626          else if (Cache[I].Delete())
 627          {
 628             if ((Cache[I].iFlags & pkgDepCache::Purge) == pkgDepCache::Purge)
 629                purge += I.Name() + string(" (") + Cache[I].CurVersion + string("), ");
 630             else
 631                remove += I.Name() + string(" (") + Cache[I].CurVersion + string("), ");
 632          }
 633       }
 634       if (_config->Exists("Commandline::AsString") == true)
 635          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 636       WriteHistoryTag("Install", install);
 637       WriteHistoryTag("Upgrade", upgrade);
 638       WriteHistoryTag("Downgrade",downgrade);
 639       WriteHistoryTag("Remove",remove);
 640       WriteHistoryTag("Purge",purge);
 641       fflush(history_out);
 642    }
 643
 644    return true;
 645 }
 646                                                                         /*}}}*/
 647 // DPkg::CloseLog                                                       /*{{{*/
 648 bool pkgDPkgPM::CloseLog()
 649 {
 650    char timestr[200];
 651    time_t t = time(NULL);
 652    struct tm *tmp = localtime(&t);
 653    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 654
 655    if(term_out)
 656    {
 657       fprintf(term_out, "Log ended: ");
 658       fprintf(term_out, "%s", timestr);
 659       fprintf(term_out, "\n");
 660       fclose(term_out);
 661    }
 662    term_out = NULL;
 663
 664    if(history_out)
 665    {
 666       if (disappearedPkgs.empty() == false)
 667       {
 668          string disappear;
 669          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 670               d != disappearedPkgs.end(); ++d)
 671          {
 672             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 673             disappear.append(*d);
 674             if (P.end() == true)
 675                disappear.append(", ");
 676             else
 677                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 678          }
 679          WriteHistoryTag("Disappeared", disappear);
 680       }
 681       if (dpkg_error.empty() == false)
 682          fprintf(history_out, "Error: %s\n", dpkg_error.c_str());
 683       fprintf(history_out, "End-Date: %s\n", timestr);
 684       fclose(history_out);
 685    }
 686    history_out = NULL;
 687
 688    return true;
 689 }
 690                                                                         /*}}}*/
 691 /*{{{*/
 692 // This implements a racy version of pselect for those architectures
 693 // that don't have a working implementation.
 694 // FIXME: Probably can be removed on Lenny+1
 695 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 696    fd_set *exceptfds, const struct timespec *timeout,
 697    const sigset_t *sigmask)
 698 {
 699    sigset_t origmask;
 700    struct timeval tv;
 701    int retval;
 702
 703    tv.tv_sec = timeout->tv_sec;
 704    tv.tv_usec = timeout->tv_nsec/1000;
 705
 706    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 707    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 708    sigprocmask(SIG_SETMASK, &origmask, 0);
 709    return retval;
 710 }
 711 /*}}}*/
 712 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 713 // ---------------------------------------------------------------------
 714 /* This globs the operations and calls dpkg
 715  *
 716  * If it is called with "OutStatusFd" set to a valid file descriptor
 717  * apt will report the install progress over this fd. It maps the
 718  * dpkg states a package goes through to human readable (and i10n-able)
 719  * names and calculates a percentage for each step.
 720 */
 721 bool pkgDPkgPM::Go(int OutStatusFd)
 722 {
 723    fd_set rfds;
 724    struct timespec tv;
 725    sigset_t sigmask;
 726    sigset_t original_sigmask;
 727
 728    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 729    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 730    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 731
 732    if (RunScripts("DPkg::Pre-Invoke") == false)
 733       return false;
 734
 735    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 736       return false;
 737
 738    // support subpressing of triggers processing for special
 739    // cases like d-i that runs the triggers handling manually
 740    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 741    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 742    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 743       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 744
 745    // map the dpkg states to the operations that are performed
 746    // (this is sorted in the same way as Item::Ops)
 747    static const struct DpkgState DpkgStatesOpMap[][7] = {
 748       // Install operation
 749       {
 750          {"half-installed", N_("Preparing %s")},
 751          {"unpacked", N_("Unpacking %s") },
 752          {NULL, NULL}
 753       },
 754       // Configure operation
 755       {
 756          {"unpacked",N_("Preparing to configure %s") },
 757          {"half-configured", N_("Configuring %s") },
 758          { "installed", N_("Installed %s")},
 759          {NULL, NULL}
 760       },
 761       // Remove operation
 762       {
 763          {"half-configured", N_("Preparing for removal of %s")},
 764          {"half-installed", N_("Removing %s")},
 765          {"config-files",  N_("Removed %s")},
 766          {NULL, NULL}
 767       },
 768       // Purge operation
 769       {
 770          {"config-files", N_("Preparing to completely remove %s")},
 771          {"not-installed", N_("Completely removed %s")},
 772          {NULL, NULL}
 773       },
 774    };
 775
 776    // init the PackageOps map, go over the list of packages that
 777    // that will be [installed|configured|removed|purged] and add
 778    // them to the PackageOps map (the dpkg states it goes through)
 779    // and the PackageOpsTranslations (human readable strings)
 780    for (vector<Item>::const_iterator I = List.begin(); I != List.end();I++)
 781    {
 782       if((*I).Pkg.end() == true)
 783          continue;
 784
 785       string const name = (*I).Pkg.Name();
 786       PackageOpsDone[name] = 0;
 787       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 788       {
 789          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 790          PackagesTotal++;
 791       }
 792    }
 793
 794    stdin_is_dev_null = false;
 795
 796    // create log
 797    OpenLog();
 798
 799    // this loop is runs once per operation
 800    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
 801    {
 802       // Do all actions with the same Op in one run
 803       vector<Item>::const_iterator J = I;
 804       if (TriggersPending == true)
 805          for (; J != List.end(); J++)
 806          {
 807             if (J->Op == I->Op)
 808                continue;
 809             if (J->Op != Item::TriggersPending)
 810                break;
 811             vector<Item>::const_iterator T = J + 1;
 812             if (T != List.end() && T->Op == I->Op)
 813                continue;
 814             break;
 815          }
 816       else
 817          for (; J != List.end() && J->Op == I->Op; J++)
 818             /* nothing */;
 819
 820       // Generate the argument list
 821       const char *Args[MaxArgs + 50];
 822
 823       // Now check if we are within the MaxArgs limit
 824       //
 825       // this code below is problematic, because it may happen that
 826       // the argument list is split in a way that A depends on B
 827       // and they are in the same "--configure A B" run
 828       // - with the split they may now be configured in different
 829       //   runs
 830       if (J - I > (signed)MaxArgs)
 831          J = I + MaxArgs;
 832
 833       unsigned int n = 0;
 834       unsigned long Size = 0;
 835       string const Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 836       Args[n++] = Tmp.c_str();
 837       Size += strlen(Args[n-1]);
 838
 839       // Stick in any custom dpkg options
 840       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 841       if (Opts != 0)
 842       {
 843          Opts = Opts->Child;
 844          for (; Opts != 0; Opts = Opts->Next)
 845          {
 846             if (Opts->Value.empty() == true)
 847                continue;
 848             Args[n++] = Opts->Value.c_str();
 849             Size += Opts->Value.length();
 850          }
 851       }
 852
 853       char status_fd_buf[20];
 854       int fd[2];
 855       pipe(fd);
 856
 857       Args[n++] = "--status-fd";
 858       Size += strlen(Args[n-1]);
 859       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 860       Args[n++] = status_fd_buf;
 861       Size += strlen(Args[n-1]);
 862
 863       switch (I->Op)
 864       {
 865          case Item::Remove:
 866          Args[n++] = "--force-depends";
 867          Size += strlen(Args[n-1]);
 868          Args[n++] = "--force-remove-essential";
 869          Size += strlen(Args[n-1]);
 870          Args[n++] = "--remove";
 871          Size += strlen(Args[n-1]);
 872          break;
 873
 874          case Item::Purge:
 875          Args[n++] = "--force-depends";
 876          Size += strlen(Args[n-1]);
 877          Args[n++] = "--force-remove-essential";
 878          Size += strlen(Args[n-1]);
 879          Args[n++] = "--purge";
 880          Size += strlen(Args[n-1]);
 881          break;
 882
 883          case Item::Configure:
 884          Args[n++] = "--configure";
 885          Size += strlen(Args[n-1]);
 886          break;
 887
 888          case Item::ConfigurePending:
 889          Args[n++] = "--configure";
 890          Size += strlen(Args[n-1]);
 891          Args[n++] = "--pending";
 892          Size += strlen(Args[n-1]);
 893          break;
 894
 895          case Item::TriggersPending:
 896          Args[n++] = "--triggers-only";
 897          Size += strlen(Args[n-1]);
 898          Args[n++] = "--pending";
 899          Size += strlen(Args[n-1]);
 900          break;
 901
 902          case Item::Install:
 903          Args[n++] = "--unpack";
 904          Size += strlen(Args[n-1]);
 905          Args[n++] = "--auto-deconfigure";
 906          Size += strlen(Args[n-1]);
 907          break;
 908       }
 909
 910       if (NoTriggers == true && I->Op != Item::TriggersPending &&
 911           I->Op != Item::ConfigurePending)
 912       {
 913          Args[n++] = "--no-triggers";
 914          Size += strlen(Args[n-1]);
 915       }
 916
 917       // Write in the file or package names
 918       if (I->Op == Item::Install)
 919       {
 920          for (;I != J && Size < MaxArgBytes; I++)
 921          {
 922             if (I->File[0] != '/')
 923                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
 924             Args[n++] = I->File.c_str();
 925             Size += strlen(Args[n-1]);
 926          }
 927       }
 928       else
 929       {
 930          for (;I != J && Size < MaxArgBytes; I++)
 931          {
 932             if((*I).Pkg.end() == true)
 933                continue;
 934             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
 935                continue;
 936             Args[n++] = I->Pkg.Name();
 937             Size += strlen(Args[n-1]);
 938          }
 939       }
 940       Args[n] = 0;
 941       J = I;
 942
 943       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
 944       {
 945          for (unsigned int k = 0; k != n; k++)
 946             clog << Args[k] << ' ';
 947          clog << endl;
 948          continue;
 949       }
 950
 951       cout << flush;
 952       clog << flush;
 953       cerr << flush;
 954
 955       /* Mask off sig int/quit. We do this because dpkg also does when
 956          it forks scripts. What happens is that when you hit ctrl-c it sends
 957          it to all processes in the group. Since dpkg ignores the signal
 958          it doesn't die but we do! So we must also ignore it */
 959       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
 960       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 961
 962       // ignore SIGHUP as well (debian #463030)
 963       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
 964
 965       struct    termios tt;
 966       struct    winsize win;
 967       int       master = -1;
 968       int       slave = -1;
 969
 970       // if tcgetattr does not return zero there was a error
 971       // and we do not do any pty magic
 972       if (tcgetattr(0, &tt) == 0)
 973       {
 974          ioctl(0, TIOCGWINSZ, (char *)&win);
 975          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
 976          {
 977             const char *s = _("Can not write log, openpty() "
 978                               "failed (/dev/pts not mounted?)\n");
 979             fprintf(stderr, "%s",s);
 980             if(term_out)
 981               fprintf(term_out, "%s",s);
 982             master = slave = -1;
 983          }  else {
 984             struct termios rtt;
 985             rtt = tt;
 986             cfmakeraw(&rtt);
 987             rtt.c_lflag &= ~ECHO;
 988             rtt.c_lflag |= ISIG;
 989             // block SIGTTOU during tcsetattr to prevent a hang if
 990             // the process is a member of the background process group
 991             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
 992             sigemptyset(&sigmask);
 993             sigaddset(&sigmask, SIGTTOU);
 994             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
 995             tcsetattr(0, TCSAFLUSH, &rtt);
 996             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
 997          }
 998       }
 999
1000        // Fork dpkg
1001       pid_t Child;
1002       _config->Set("APT::Keep-Fds::",fd[1]);
1003       // send status information that we are about to fork dpkg
1004       if(OutStatusFd > 0) {
1005          ostringstream status;
1006          status << "pmstatus:dpkg-exec:"
1007                 << (PackagesDone/float(PackagesTotal)*100.0)
1008                 << ":" << _("Running dpkg")
1009                 << endl;
1010          write(OutStatusFd, status.str().c_str(), status.str().size());
1011       }
1012       Child = ExecFork();
1013
1014       // This is the child
1015       if (Child == 0)
1016       {
1017          if(slave >= 0 && master >= 0)
1018          {
1019             setsid();
1020             ioctl(slave, TIOCSCTTY, 0);
1021             close(master);
1022             dup2(slave, 0);
1023             dup2(slave, 1);
1024             dup2(slave, 2);
1025             close(slave);
1026          }
1027          close(fd[0]); // close the read end of the pipe
1028
1029          if (_config->FindDir("DPkg::Chroot-Directory","/") != "/")
1030          {
1031             std::cerr << "Chrooting into "
1032                       << _config->FindDir("DPkg::Chroot-Directory")
1033                       << std::endl;
1034             if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0)
1035                _exit(100);
1036          }
1037
1038          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1039             _exit(100);
1040
1041          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1042          {
1043             int Flags,dummy;
1044             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1045                _exit(100);
1046
1047             // Discard everything in stdin before forking dpkg
1048             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1049                _exit(100);
1050
1051             while (read(STDIN_FILENO,&dummy,1) == 1);
1052
1053             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1054                _exit(100);
1055          }
1056
1057          /* No Job Control Stop Env is a magic dpkg var that prevents it
1058             from using sigstop */
1059          putenv((char *)"DPKG_NO_TSTP=yes");
1060          execvp(Args[0],(char **)Args);
1061          cerr << "Could not exec dpkg!" << endl;
1062          _exit(100);
1063       }
1064
1065       // apply ionice
1066       if (_config->FindB("DPkg::UseIoNice", false) == true)
1067          ionice(Child);
1068
1069       // clear the Keep-Fd again
1070       _config->Clear("APT::Keep-Fds",fd[1]);
1071
1072       // Wait for dpkg
1073       int Status = 0;
1074
1075       // we read from dpkg here
1076       int const _dpkgin = fd[0];
1077       close(fd[1]);                        // close the write end of the pipe
1078
1079       if(slave > 0)
1080          close(slave);
1081
1082       // setups fds
1083       sigemptyset(&sigmask);
1084       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1085
1086       // the result of the waitpid call
1087       int res;
1088       int select_ret;
1089       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1090          if(res < 0) {
1091             // FIXME: move this to a function or something, looks ugly here
1092             // error handling, waitpid returned -1
1093             if (errno == EINTR)
1094                continue;
1095             RunScripts("DPkg::Post-Invoke");
1096
1097             // Restore sig int/quit
1098             signal(SIGQUIT,old_SIGQUIT);
1099             signal(SIGINT,old_SIGINT);
1100             signal(SIGHUP,old_SIGHUP);
1101             return _error->Errno("waitpid","Couldn't wait for subprocess");
1102          }
1103
1104          // wait for input or output here
1105          FD_ZERO(&rfds);
1106          if (master >= 0 && !stdin_is_dev_null)
1107             FD_SET(0, &rfds);
1108          FD_SET(_dpkgin, &rfds);
1109          if(master >= 0)
1110             FD_SET(master, &rfds);
1111          tv.tv_sec = 1;
1112          tv.tv_nsec = 0;
1113          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1114                               &tv, &original_sigmask);
1115          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1116             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1117                                       NULL, &tv, &original_sigmask);
1118          if (select_ret == 0)
1119             continue;
1120          else if (select_ret < 0 && errno == EINTR)
1121             continue;
1122          else if (select_ret < 0)
1123          {
1124             perror("select() returned error");
1125             continue;
1126          }
1127
1128          if(master >= 0 && FD_ISSET(master, &rfds))
1129             DoTerminalPty(master);
1130          if(master >= 0 && FD_ISSET(0, &rfds))
1131             DoStdin(master);
1132          if(FD_ISSET(_dpkgin, &rfds))
1133             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1134       }
1135       close(_dpkgin);
1136
1137       // Restore sig int/quit
1138       signal(SIGQUIT,old_SIGQUIT);
1139       signal(SIGINT,old_SIGINT);
1140       signal(SIGHUP,old_SIGHUP);
1141
1142       if(master >= 0)
1143       {
1144          tcsetattr(0, TCSAFLUSH, &tt);
1145          close(master);
1146       }
1147
1148       // Check for an error code.
1149       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1150       {
1151          // if it was set to "keep-dpkg-runing" then we won't return
1152          // here but keep the loop going and just report it as a error
1153          // for later
1154          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1155
1156          if(stopOnError)
1157             RunScripts("DPkg::Post-Invoke");
1158
1159          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1160             strprintf(dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1161          else if (WIFEXITED(Status) != 0)
1162             strprintf(dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1163          else
1164             strprintf(dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1165
1166          if(dpkg_error.size() > 0)
1167             _error->Error(dpkg_error.c_str());
1168
1169          if(stopOnError)
1170          {
1171             CloseLog();
1172             return false;
1173          }
1174       }
1175    }
1176    CloseLog();
1177
1178    if (RunScripts("DPkg::Post-Invoke") == false)
1179       return false;
1180
1181    Cache.writeStateFile(NULL);
1182    return true;
1183 }
1184                                                                         /*}}}*/
1185 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1186 // ---------------------------------------------------------------------
1187 /* */
1188 void pkgDPkgPM::Reset()
1189 {
1190    List.erase(List.begin(),List.end());
1191 }
1192                                                                         /*}}}*/