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("trigproc",  N_("Running post-installation trigger %s"))
  53   };
  54
  55   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  56   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  57
  58   // Predicate to test whether an entry in the PackageProcessingOps
  59   // array matches a string.
  60   class MatchProcessingOp
  61   {
  62     const char *target;
  63
  64   public:
  65     MatchProcessingOp(const char *the_target)
  66       : target(the_target)
  67     {
  68     }
  69
  70     bool operator()(const std::pair<const char *, const char *> &pair) const
  71     {
  72       return strcmp(pair.first, target) == 0;
  73     }
  74   };
  75 }
  76
  77 /* helper function to ionice the given PID
  78
  79  there is no C header for ionice yet - just the syscall interface
  80  so we use the binary from util-linux
  81 */
  82 static bool
  83 ionice(int PID)
  84 {
  85    if (!FileExists("/usr/bin/ionice"))
  86       return false;
  87    pid_t Process = ExecFork();
  88    if (Process == 0)
  89    {
  90       char buf[32];
  91       snprintf(buf, sizeof(buf), "-p%d", PID);
  92       const char *Args[4];
  93       Args[0] = "/usr/bin/ionice";
  94       Args[1] = "-c3";
  95       Args[2] = buf;
  96       Args[3] = 0;
  97       execv(Args[0], (char **)Args);
  98    }
  99    return ExecWait(Process, "ionice");
 100 }
 101
 102 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 103 // ---------------------------------------------------------------------
 104 /* */
 105 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 106    : pkgPackageManager(Cache), dpkgbuf_pos(0),
 107      term_out(NULL), PackagesDone(0), PackagesTotal(0)
 108 {
 109 }
 110                                                                         /*}}}*/
 111 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 112 // ---------------------------------------------------------------------
 113 /* */
 114 pkgDPkgPM::~pkgDPkgPM()
 115 {
 116 }
 117                                                                         /*}}}*/
 118 // DPkgPM::Install - Install a package                                  /*{{{*/
 119 // ---------------------------------------------------------------------
 120 /* Add an install operation to the sequence list */
 121 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 122 {
 123    if (File.empty() == true || Pkg.end() == true)
 124       return _error->Error("Internal Error, No file name for %s",Pkg.Name());
 125
 126    List.push_back(Item(Item::Install,Pkg,File));
 127    return true;
 128 }
 129                                                                         /*}}}*/
 130 // DPkgPM::Configure - Configure a package                              /*{{{*/
 131 // ---------------------------------------------------------------------
 132 /* Add a configure operation to the sequence list */
 133 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 134 {
 135    if (Pkg.end() == true)
 136       return false;
 137
 138    List.push_back(Item(Item::Configure,Pkg));
 139    return true;
 140 }
 141                                                                         /*}}}*/
 142 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 143 // ---------------------------------------------------------------------
 144 /* Add a remove operation to the sequence list */
 145 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 146 {
 147    if (Pkg.end() == true)
 148       return false;
 149
 150    if (Purge == true)
 151       List.push_back(Item(Item::Purge,Pkg));
 152    else
 153       List.push_back(Item(Item::Remove,Pkg));
 154    return true;
 155 }
 156                                                                         /*}}}*/
 157 // DPkgPM::SendV2Pkgs - Send version 2 package info                     /*{{{*/
 158 // ---------------------------------------------------------------------
 159 /* This is part of the helper script communication interface, it sends
 160    very complete information down to the other end of the pipe.*/
 161 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 162 {
 163    fprintf(F,"VERSION 2\n");
 164
 165    /* Write out all of the configuration directives by walking the
 166       configuration tree */
 167    const Configuration::Item *Top = _config->Tree(0);
 168    for (; Top != 0;)
 169    {
 170       if (Top->Value.empty() == false)
 171       {
 172          fprintf(F,"%s=%s\n",
 173                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 174                  QuoteString(Top->Value,"\n").c_str());
 175       }
 176
 177       if (Top->Child != 0)
 178       {
 179          Top = Top->Child;
 180          continue;
 181       }
 182
 183       while (Top != 0 && Top->Next == 0)
 184          Top = Top->Parent;
 185       if (Top != 0)
 186          Top = Top->Next;
 187    }
 188    fprintf(F,"\n");
 189
 190    // Write out the package actions in order.
 191    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 192    {
 193       pkgDepCache::StateCache &S = Cache[I->Pkg];
 194
 195       fprintf(F,"%s ",I->Pkg.Name());
 196       // Current version
 197       if (I->Pkg->CurrentVer == 0)
 198          fprintf(F,"- ");
 199       else
 200          fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
 201
 202       // Show the compare operator
 203       // Target version
 204       if (S.InstallVer != 0)
 205       {
 206          int Comp = 2;
 207          if (I->Pkg->CurrentVer != 0)
 208             Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
 209          if (Comp < 0)
 210             fprintf(F,"> ");
 211          if (Comp == 0)
 212             fprintf(F,"= ");
 213          if (Comp > 0)
 214             fprintf(F,"< ");
 215          fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
 216       }
 217       else
 218          fprintf(F,"> - ");
 219
 220       // Show the filename/operation
 221       if (I->Op == Item::Install)
 222       {
 223          // No errors here..
 224          if (I->File[0] != '/')
 225             fprintf(F,"**ERROR**\n");
 226          else
 227             fprintf(F,"%s\n",I->File.c_str());
 228       }
 229       if (I->Op == Item::Configure)
 230          fprintf(F,"**CONFIGURE**\n");
 231       if (I->Op == Item::Remove ||
 232           I->Op == Item::Purge)
 233          fprintf(F,"**REMOVE**\n");
 234
 235       if (ferror(F) != 0)
 236          return false;
 237    }
 238    return true;
 239 }
 240                                                                         /*}}}*/
 241 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 242 // ---------------------------------------------------------------------
 243 /* This looks for a list of scripts to run from the configuration file
 244    each one is run and is fed on standard input a list of all .deb files
 245    that are due to be installed. */
 246 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 247 {
 248    Configuration::Item const *Opts = _config->Tree(Cnf);
 249    if (Opts == 0 || Opts->Child == 0)
 250       return true;
 251    Opts = Opts->Child;
 252
 253    unsigned int Count = 1;
 254    for (; Opts != 0; Opts = Opts->Next, Count++)
 255    {
 256       if (Opts->Value.empty() == true)
 257          continue;
 258
 259       // Determine the protocol version
 260       string OptSec = Opts->Value;
 261       string::size_type Pos;
 262       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 263          Pos = OptSec.length();
 264       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 265
 266       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 267
 268       // Create the pipes
 269       int Pipes[2];
 270       if (pipe(Pipes) != 0)
 271          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 272       SetCloseExec(Pipes[0],true);
 273       SetCloseExec(Pipes[1],true);
 274
 275       // Purified Fork for running the script
 276       pid_t Process = ExecFork();
 277       if (Process == 0)
 278       {
 279          // Setup the FDs
 280          dup2(Pipes[0],STDIN_FILENO);
 281          SetCloseExec(STDOUT_FILENO,false);
 282          SetCloseExec(STDIN_FILENO,false);
 283          SetCloseExec(STDERR_FILENO,false);
 284
 285          const char *Args[4];
 286          Args[0] = "/bin/sh";
 287          Args[1] = "-c";
 288          Args[2] = Opts->Value.c_str();
 289          Args[3] = 0;
 290          execv(Args[0],(char **)Args);
 291          _exit(100);
 292       }
 293       close(Pipes[0]);
 294       FILE *F = fdopen(Pipes[1],"w");
 295       if (F == 0)
 296          return _error->Errno("fdopen","Faild to open new FD");
 297
 298       // Feed it the filenames.
 299       bool Die = false;
 300       if (Version <= 1)
 301       {
 302          for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
 303          {
 304             // Only deal with packages to be installed from .deb
 305             if (I->Op != Item::Install)
 306                continue;
 307
 308             // No errors here..
 309             if (I->File[0] != '/')
 310                continue;
 311
 312             /* Feed the filename of each package that is pending install
 313                into the pipe. */
 314             fprintf(F,"%s\n",I->File.c_str());
 315             if (ferror(F) != 0)
 316             {
 317                Die = true;
 318                break;
 319             }
 320          }
 321       }
 322       else
 323          Die = !SendV2Pkgs(F);
 324
 325       fclose(F);
 326
 327       // Clean up the sub process
 328       if (ExecWait(Process,Opts->Value.c_str()) == false)
 329          return _error->Error("Failure running script %s",Opts->Value.c_str());
 330    }
 331
 332    return true;
 333 }
 334
 335                                                                         /*}}}*/
 336 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 337 // ---------------------------------------------------------------------
 338 /*
 339 */
 340 void pkgDPkgPM::DoStdin(int master)
 341 {
 342    unsigned char input_buf[256] = {0,};
 343    ssize_t len = read(0, input_buf, sizeof(input_buf));
 344    if (len)
 345       write(master, input_buf, len);
 346    else
 347       stdin_is_dev_null = true;
 348 }
 349                                                                         /*}}}*/
 350 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 351 // ---------------------------------------------------------------------
 352 /*
 353  * read the terminal pty and write log
 354  */
 355 void pkgDPkgPM::DoTerminalPty(int master)
 356 {
 357    unsigned char term_buf[1024] = {0,0, };
 358
 359    ssize_t len=read(master, term_buf, sizeof(term_buf));
 360    if(len == -1 && errno == EIO)
 361    {
 362       // this happens when the child is about to exit, we
 363       // give it time to actually exit, otherwise we run
 364       // into a race
 365       usleep(500000);
 366       return;
 367    }
 368    if(len <= 0)
 369       return;
 370    write(1, term_buf, len);
 371    if(term_out)
 372       fwrite(term_buf, len, sizeof(char), term_out);
 373 }
 374                                                                         /*}}}*/
 375 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 376 // ---------------------------------------------------------------------
 377 /*
 378  */
 379 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 380 {
 381    // the status we output
 382    ostringstream status;
 383
 384    if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 385       std::clog << "got from dpkg '" << line << "'" << std::endl;
 386
 387
 388    /* dpkg sends strings like this:
 389       'status:   <pkg>:  <pkg  qstate>'
 390       errors look like this:
 391       '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
 392       and conffile-prompt like this
 393       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 394
 395       Newer versions of dpkg sent also:
 396       'processing: install: pkg'
 397       'processing: configure: pkg'
 398       'processing: remove: pkg'
 399       'processing: trigproc: trigger'
 400
 401    */
 402    char* list[5];
 403    //        dpkg sends multiline error messages sometimes (see
 404    //        #374195 for a example. we should support this by
 405    //        either patching dpkg to not send multiline over the
 406    //        statusfd or by rewriting the code here to deal with
 407    //        it. for now we just ignore it and not crash
 408    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 409    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 410    {
 411       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 412          std::clog << "ignoring line: not enough ':'" << std::endl;
 413       return;
 414    }
 415    char *pkg = list[1];
 416    char *action = _strstrip(list[2]);
 417
 418    // 'processing' from dpkg looks like
 419    // 'processing: action: pkg'
 420    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 421    {
 422       char s[200];
 423       char *pkg_or_trigger = _strstrip(list[2]);
 424       action =_strstrip( list[1]);
 425       const std::pair<const char *, const char *> * const iter =
 426         std::find_if(PackageProcessingOpsBegin,
 427                      PackageProcessingOpsEnd,
 428                      MatchProcessingOp(action));
 429       if(iter == PackageProcessingOpsEnd)
 430       {
 431          if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 432             std::clog << "ignoring unknwon action: " << action << std::endl;
 433          return;
 434       }
 435       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 436
 437       status << "pmstatus:" << pkg_or_trigger
 438              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 439              << ":" << s
 440              << endl;
 441       if(OutStatusFd > 0)
 442          write(OutStatusFd, status.str().c_str(), status.str().size());
 443       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 444          std::clog << "send: '" << status.str() << "'" << endl;
 445       return;
 446    }
 447
 448    if(strncmp(action,"error",strlen("error")) == 0)
 449    {
 450       status << "pmerror:" << list[1]
 451              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 452              << ":" << list[3]
 453              << endl;
 454       if(OutStatusFd > 0)
 455          write(OutStatusFd, status.str().c_str(), status.str().size());
 456       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 457          std::clog << "send: '" << status.str() << "'" << endl;
 458       return;
 459    }
 460    if(strncmp(action,"conffile",strlen("conffile")) == 0)
 461    {
 462       status << "pmconffile:" << list[1]
 463              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 464              << ":" << list[3]
 465              << endl;
 466       if(OutStatusFd > 0)
 467          write(OutStatusFd, status.str().c_str(), status.str().size());
 468       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 469          std::clog << "send: '" << status.str() << "'" << endl;
 470       return;
 471    }
 472
 473    vector<struct DpkgState> &states = PackageOps[pkg];
 474    const char *next_action = NULL;
 475    if(PackageOpsDone[pkg] < states.size())
 476       next_action = states[PackageOpsDone[pkg]].state;
 477    // check if the package moved to the next dpkg state
 478    if(next_action && (strcmp(action, next_action) == 0))
 479    {
 480       // only read the translation if there is actually a next
 481       // action
 482       const char *translation = _(states[PackageOpsDone[pkg]].str);
 483       char s[200];
 484       snprintf(s, sizeof(s), translation, pkg);
 485
 486       // we moved from one dpkg state to a new one, report that
 487       PackageOpsDone[pkg]++;
 488       PackagesDone++;
 489       // build the status str
 490       status << "pmstatus:" << pkg
 491              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 492              << ":" << s
 493              << endl;
 494       if(OutStatusFd > 0)
 495          write(OutStatusFd, status.str().c_str(), status.str().size());
 496       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 497          std::clog << "send: '" << status.str() << "'" << endl;
 498    }
 499    if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 500       std::clog << "(parsed from dpkg) pkg: " << pkg
 501                 << " action: " << action << endl;
 502 }
 503
 504 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 505 // ---------------------------------------------------------------------
 506 /*
 507  */
 508 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 509 {
 510    char *p, *q;
 511    int len;
 512
 513    len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
 514    dpkgbuf_pos += len;
 515    if(len <= 0)
 516       return;
 517
 518    // process line by line if we have a buffer
 519    p = q = dpkgbuf;
 520    while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
 521    {
 522       *q = 0;
 523       ProcessDpkgStatusLine(OutStatusFd, p);
 524       p=q+1; // continue with next line
 525    }
 526
 527    // now move the unprocessed bits (after the final \n that is now a 0x0)
 528    // to the start and update dpkgbuf_pos
 529    p = (char*)memrchr(dpkgbuf, 0, dpkgbuf_pos);
 530    if(p == NULL)
 531       return;
 532
 533    // we are interessted in the first char *after* 0x0
 534    p++;
 535
 536    // move the unprocessed tail to the start and update pos
 537    memmove(dpkgbuf, p, p-dpkgbuf);
 538    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 539 }
 540                                                                         /*}}}*/
 541
 542 bool pkgDPkgPM::OpenLog()
 543 {
 544    string logdir = _config->FindDir("Dir::Log");
 545    if(not FileExists(logdir))
 546       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 547    string logfile_name = flCombine(logdir,
 548                                    _config->Find("Dir::Log::Terminal"));
 549    if (!logfile_name.empty())
 550    {
 551       term_out = fopen(logfile_name.c_str(),"a");
 552       chmod(logfile_name.c_str(), 0600);
 553       // output current time
 554       char outstr[200];
 555       time_t t = time(NULL);
 556       struct tm *tmp = localtime(&t);
 557       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 558       fprintf(term_out, "\nLog started: ");
 559       fprintf(term_out, "%s", outstr);
 560       fprintf(term_out, "\n");
 561    }
 562    return true;
 563 }
 564
 565 bool pkgDPkgPM::CloseLog()
 566 {
 567    if(term_out)
 568    {
 569       char outstr[200];
 570       time_t t = time(NULL);
 571       struct tm *tmp = localtime(&t);
 572       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
 573       fprintf(term_out, "Log ended: ");
 574       fprintf(term_out, "%s", outstr);
 575       fprintf(term_out, "\n");
 576       fclose(term_out);
 577    }
 578    term_out = NULL;
 579    return true;
 580 }
 581
 582 /*{{{*/
 583 // This implements a racy version of pselect for those architectures
 584 // that don't have a working implementation.
 585 // FIXME: Probably can be removed on Lenny+1
 586 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 587    fd_set *exceptfds, const struct timespec *timeout,
 588    const sigset_t *sigmask)
 589 {
 590    sigset_t origmask;
 591    struct timeval tv;
 592    int retval;
 593
 594    tv.tv_sec = timeout->tv_sec;
 595    tv.tv_usec = timeout->tv_nsec/1000;
 596
 597    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 598    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 599    sigprocmask(SIG_SETMASK, &origmask, 0);
 600    return retval;
 601 }
 602 /*}}}*/
 603
 604 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 605 // ---------------------------------------------------------------------
 606 /* This globs the operations and calls dpkg
 607  *
 608  * If it is called with "OutStatusFd" set to a valid file descriptor
 609  * apt will report the install progress over this fd. It maps the
 610  * dpkg states a package goes through to human readable (and i10n-able)
 611  * names and calculates a percentage for each step.
 612 */
 613 bool pkgDPkgPM::Go(int OutStatusFd)
 614 {
 615    fd_set rfds;
 616    struct timespec tv;
 617    sigset_t sigmask;
 618    sigset_t original_sigmask;
 619
 620    unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 621    unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 622    bool NoTriggers = _config->FindB("DPkg::NoTriggers",false);
 623
 624    if (RunScripts("DPkg::Pre-Invoke") == false)
 625       return false;
 626
 627    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 628       return false;
 629
 630    // map the dpkg states to the operations that are performed
 631    // (this is sorted in the same way as Item::Ops)
 632    static const struct DpkgState DpkgStatesOpMap[][7] = {
 633       // Install operation
 634       {
 635          {"half-installed", N_("Preparing %s")},
 636          {"unpacked", N_("Unpacking %s") },
 637          {NULL, NULL}
 638       },
 639       // Configure operation
 640       {
 641          {"unpacked",N_("Preparing to configure %s") },
 642          {"half-configured", N_("Configuring %s") },
 643 #if 0
 644          {"triggers-awaited", N_("Processing triggers for %s") },
 645          {"triggers-pending", N_("Processing triggers for %s") },
 646 #endif
 647          { "installed", N_("Installed %s")},
 648          {NULL, NULL}
 649       },
 650       // Remove operation
 651       {
 652          {"half-configured", N_("Preparing for removal of %s")},
 653 #if 0
 654          {"triggers-awaited", N_("Preparing for removal of %s")},
 655          {"triggers-pending", N_("Preparing for removal of %s")},
 656 #endif
 657          {"half-installed", N_("Removing %s")},
 658          {"config-files",  N_("Removed %s")},
 659          {NULL, NULL}
 660       },
 661       // Purge operation
 662       {
 663          {"config-files", N_("Preparing to completely remove %s")},
 664          {"not-installed", N_("Completely removed %s")},
 665          {NULL, NULL}
 666       },
 667    };
 668
 669    // init the PackageOps map, go over the list of packages that
 670    // that will be [installed|configured|removed|purged] and add
 671    // them to the PackageOps map (the dpkg states it goes through)
 672    // and the PackageOpsTranslations (human readable strings)
 673    for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
 674    {
 675       string name = (*I).Pkg.Name();
 676       PackageOpsDone[name] = 0;
 677       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++)
 678       {
 679          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 680          PackagesTotal++;
 681       }
 682    }
 683
 684    stdin_is_dev_null = false;
 685
 686    // create log
 687    OpenLog();
 688
 689    // this loop is runs once per operation
 690    for (vector<Item>::iterator I = List.begin(); I != List.end();)
 691    {
 692       vector<Item>::iterator J = I;
 693       for (; J != List.end() && J->Op == I->Op; J++);
 694
 695       // Generate the argument list
 696       const char *Args[MaxArgs + 50];
 697       if (J - I > (signed)MaxArgs)
 698          J = I + MaxArgs;
 699
 700       unsigned int n = 0;
 701       unsigned long Size = 0;
 702       string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 703       Args[n++] = Tmp.c_str();
 704       Size += strlen(Args[n-1]);
 705
 706       // Stick in any custom dpkg options
 707       Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 708       if (Opts != 0)
 709       {
 710          Opts = Opts->Child;
 711          for (; Opts != 0; Opts = Opts->Next)
 712          {
 713             if (Opts->Value.empty() == true)
 714                continue;
 715             Args[n++] = Opts->Value.c_str();
 716             Size += Opts->Value.length();
 717          }
 718       }
 719
 720       char status_fd_buf[20];
 721       int fd[2];
 722       pipe(fd);
 723
 724       Args[n++] = "--status-fd";
 725       Size += strlen(Args[n-1]);
 726       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 727       Args[n++] = status_fd_buf;
 728       Size += strlen(Args[n-1]);
 729
 730       switch (I->Op)
 731       {
 732          case Item::Remove:
 733          Args[n++] = "--force-depends";
 734          Size += strlen(Args[n-1]);
 735          Args[n++] = "--force-remove-essential";
 736          Size += strlen(Args[n-1]);
 737          Args[n++] = "--remove";
 738          Size += strlen(Args[n-1]);
 739          break;
 740
 741          case Item::Purge:
 742          Args[n++] = "--force-depends";
 743          Size += strlen(Args[n-1]);
 744          Args[n++] = "--force-remove-essential";
 745          Size += strlen(Args[n-1]);
 746          Args[n++] = "--purge";
 747          Size += strlen(Args[n-1]);
 748          break;
 749
 750          case Item::Configure:
 751          Args[n++] = "--configure";
 752          if (NoTriggers)
 753             Args[n++] = "--no-triggers";
 754          Size += strlen(Args[n-1]);
 755          break;
 756
 757          case Item::Install:
 758          Args[n++] = "--unpack";
 759          Size += strlen(Args[n-1]);
 760          Args[n++] = "--auto-deconfigure";
 761          Size += strlen(Args[n-1]);
 762          break;
 763       }
 764
 765       // Write in the file or package names
 766       if (I->Op == Item::Install)
 767       {
 768          for (;I != J && Size < MaxArgBytes; I++)
 769          {
 770             if (I->File[0] != '/')
 771                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
 772             Args[n++] = I->File.c_str();
 773             Size += strlen(Args[n-1]);
 774          }
 775       }
 776       else
 777       {
 778          for (;I != J && Size < MaxArgBytes; I++)
 779          {
 780             Args[n++] = I->Pkg.Name();
 781             Size += strlen(Args[n-1]);
 782          }
 783       }
 784       Args[n] = 0;
 785       J = I;
 786
 787       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
 788       {
 789          for (unsigned int k = 0; k != n; k++)
 790             clog << Args[k] << ' ';
 791          clog << endl;
 792          continue;
 793       }
 794
 795       cout << flush;
 796       clog << flush;
 797       cerr << flush;
 798
 799       /* Mask off sig int/quit. We do this because dpkg also does when
 800          it forks scripts. What happens is that when you hit ctrl-c it sends
 801          it to all processes in the group. Since dpkg ignores the signal
 802          it doesn't die but we do! So we must also ignore it */
 803       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
 804       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 805
 806       // ignore SIGHUP as well (debian #463030)
 807       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
 808
 809       struct    termios tt;
 810       struct    winsize win;
 811       int       master;
 812       int       slave;
 813
 814       // FIXME: setup sensible signal handling (*ick*)
 815       tcgetattr(0, &tt);
 816       ioctl(0, TIOCGWINSZ, (char *)&win);
 817       if (openpty(&master, &slave, NULL, &tt, &win) < 0)
 818       {
 819          const char *s = _("Can not write log, openpty() "
 820                            "failed (/dev/pts not mounted?)\n");
 821          fprintf(stderr, "%s",s);
 822          fprintf(term_out, "%s",s);
 823          master = slave = -1;
 824       }  else {
 825          struct termios rtt;
 826          rtt = tt;
 827          cfmakeraw(&rtt);
 828          rtt.c_lflag &= ~ECHO;
 829          // block SIGTTOU during tcsetattr to prevent a hang if
 830          // the process is a member of the background process group
 831          // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
 832          sigemptyset(&sigmask);
 833          sigaddset(&sigmask, SIGTTOU);
 834          sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
 835          tcsetattr(0, TCSAFLUSH, &rtt);
 836          sigprocmask(SIG_SETMASK, &original_sigmask, 0);
 837       }
 838
 839        // Fork dpkg
 840       pid_t Child;
 841       _config->Set("APT::Keep-Fds::",fd[1]);
 842       // send status information that we are about to fork dpkg
 843       if(OutStatusFd > 0) {
 844          ostringstream status;
 845          status << "pmstatus:dpkg-exec:"
 846                 << (PackagesDone/float(PackagesTotal)*100.0)
 847                 << ":" << _("Running dpkg")
 848                 << endl;
 849          write(OutStatusFd, status.str().c_str(), status.str().size());
 850       }
 851       Child = ExecFork();
 852
 853       // This is the child
 854       if (Child == 0)
 855       {
 856          if(slave >= 0 && master >= 0)
 857          {
 858             setsid();
 859             ioctl(slave, TIOCSCTTY, 0);
 860             close(master);
 861             dup2(slave, 0);
 862             dup2(slave, 1);
 863             dup2(slave, 2);
 864             close(slave);
 865          }
 866          close(fd[0]); // close the read end of the pipe
 867
 868          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
 869             _exit(100);
 870
 871          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
 872          {
 873             int Flags,dummy;
 874             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
 875                _exit(100);
 876
 877             // Discard everything in stdin before forking dpkg
 878             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
 879                _exit(100);
 880
 881             while (read(STDIN_FILENO,&dummy,1) == 1);
 882
 883             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
 884                _exit(100);
 885          }
 886
 887          /* No Job Control Stop Env is a magic dpkg var that prevents it
 888             from using sigstop */
 889          putenv((char *)"DPKG_NO_TSTP=yes");
 890          execvp(Args[0],(char **)Args);
 891          cerr << "Could not exec dpkg!" << endl;
 892          _exit(100);
 893       }
 894
 895       // apply ionice
 896       if (_config->FindB("DPkg::UseIoNice", false) == true)
 897          ionice(Child);
 898
 899       // clear the Keep-Fd again
 900       _config->Clear("APT::Keep-Fds",fd[1]);
 901
 902       // Wait for dpkg
 903       int Status = 0;
 904
 905       // we read from dpkg here
 906       int _dpkgin = fd[0];
 907       close(fd[1]);                        // close the write end of the pipe
 908
 909       // the result of the waitpid call
 910       int res;
 911       if(slave > 0)
 912          close(slave);
 913
 914       // setups fds
 915       sigemptyset(&sigmask);
 916       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
 917
 918       int select_ret;
 919       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
 920          if(res < 0) {
 921             // FIXME: move this to a function or something, looks ugly here
 922             // error handling, waitpid returned -1
 923             if (errno == EINTR)
 924                continue;
 925             RunScripts("DPkg::Post-Invoke");
 926
 927             // Restore sig int/quit
 928             signal(SIGQUIT,old_SIGQUIT);
 929             signal(SIGINT,old_SIGINT);
 930             signal(SIGHUP,old_SIGHUP);
 931             return _error->Errno("waitpid","Couldn't wait for subprocess");
 932          }
 933
 934          // wait for input or output here
 935          FD_ZERO(&rfds);
 936          if (!stdin_is_dev_null)
 937             FD_SET(0, &rfds);
 938          FD_SET(_dpkgin, &rfds);
 939          if(master >= 0)
 940             FD_SET(master, &rfds);
 941          tv.tv_sec = 1;
 942          tv.tv_nsec = 0;
 943          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
 944                               &tv, &original_sigmask);
 945          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
 946             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
 947                                       NULL, &tv, &original_sigmask);
 948          if (select_ret == 0)
 949             continue;
 950          else if (select_ret < 0 && errno == EINTR)
 951             continue;
 952          else if (select_ret < 0)
 953          {
 954             perror("select() returned error");
 955             continue;
 956          }
 957
 958          if(master >= 0 && FD_ISSET(master, &rfds))
 959             DoTerminalPty(master);
 960          if(master >= 0 && FD_ISSET(0, &rfds))
 961             DoStdin(master);
 962          if(FD_ISSET(_dpkgin, &rfds))
 963             DoDpkgStatusFd(_dpkgin, OutStatusFd);
 964       }
 965       close(_dpkgin);
 966
 967       // Restore sig int/quit
 968       signal(SIGQUIT,old_SIGQUIT);
 969       signal(SIGINT,old_SIGINT);
 970       signal(SIGHUP,old_SIGHUP);
 971
 972       if(master >= 0)
 973       {
 974          tcsetattr(0, TCSAFLUSH, &tt);
 975          close(master);
 976       }
 977
 978       // Check for an error code.
 979       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
 980       {
 981          // if it was set to "keep-dpkg-runing" then we won't return
 982          // here but keep the loop going and just report it as a error
 983          // for later
 984          bool stopOnError = _config->FindB("Dpkg::StopOnError",true);
 985
 986          if(stopOnError)
 987             RunScripts("DPkg::Post-Invoke");
 988
 989          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
 990             _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
 991          else if (WIFEXITED(Status) != 0)
 992             _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
 993          else
 994             _error->Error("Sub-process %s exited unexpectedly",Args[0]);
 995
 996          if(stopOnError)
 997          {
 998             CloseLog();
 999             return false;
1000          }
1001       }
1002    }
1003    CloseLog();
1004
1005    if (RunScripts("DPkg::Post-Invoke") == false)
1006       return false;
1007
1008    Cache.writeStateFile(NULL);
1009    return true;
1010 }
1011                                                                         /*}}}*/
1012 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1013 // ---------------------------------------------------------------------
1014 /* */
1015 void pkgDPkgPM::Reset()
1016 {
1017    List.erase(List.begin(),List.end());
1018 }
1019                                                                         /*}}}*/