* apt-pkg/deb/dpkgpm.cc:

[apt.git] / apt-pkg / deb / dpkgpm.cc

diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index 40aafafa495cccaad2f77822fe50bc2eb387b6c6..3dca2b20981ea0398ef9da2923b91cb1d8e87696 100644 (file)
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -49,6 +49,7 @@ namespace
     std::make_pair("install",   N_("Installing %s")),
     std::make_pair("configure", N_("Configuring %s")),
     std::make_pair("remove",    N_("Removing %s")),
     std::make_pair("install",   N_("Installing %s")),
     std::make_pair("configure", N_("Configuring %s")),
     std::make_pair("remove",    N_("Removing %s")),

+    std::make_pair("purge",    N_("Completely removing %s")),

     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
   };
 
     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
   };
 


@@ -74,6 +75,31 @@ namespace
   };
 }
 
   };
 }
 

+/* helper function to ionice the given PID 
+
+ there is no C header for ionice yet - just the syscall interface
+ so we use the binary from util-linux
+*/
+static bool
+ionice(int PID)
+{
+   if (!FileExists("/usr/bin/ionice"))
+      return false;
+   pid_t Process = ExecFork();      
+   if (Process == 0)
+   {
+      char buf[32];
+      snprintf(buf, sizeof(buf), "-p%d", PID);
+      const char *Args[4];
+      Args[0] = "/usr/bin/ionice";
+      Args[1] = "-c3";
+      Args[2] = buf;
+      Args[3] = 0;
+      execv(Args[0], (char **)Args);
+   }
+   return ExecWait(Process, "ionice");
+}
+

 // DPkgPM::pkgDPkgPM - Constructor                                     /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // DPkgPM::pkgDPkgPM - Constructor                                     /*{{{*/
 // ---------------------------------------------------------------------
 /* */


@@ -109,8 +135,14 @@ bool pkgDPkgPM::Configure(PkgIterator Pkg)
 {
    if (Pkg.end() == true)
       return false;
 {
    if (Pkg.end() == true)
       return false;

-   
-   List.push_back(Item(Item::Configure,Pkg));
+
+   List.push_back(Item(Item::Configure, Pkg));
+
+   // Use triggers for config calls if we configure "smart"
+   // as otherwise Pre-Depends will not be satisfied, see #526774
+   if (_config->FindB("DPkg::TriggersPending", false) == true)
+      List.push_back(Item(Item::TriggersPending, PkgIterator()));
+

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/


@@ -165,6 +197,9 @@ bool pkgDPkgPM::SendV2Pkgs(FILE *F)
    // Write out the package actions in order.
    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
    {
    // Write out the package actions in order.
    for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
    {

+      if(I->Pkg.end() == true)
+        continue;
+

       pkgDepCache::StateCache &S = Cache[I->Pkg];
       
       fprintf(F,"%s ",I->Pkg.Name());
       pkgDepCache::StateCache &S = Cache[I->Pkg];
       
       fprintf(F,"%s ",I->Pkg.Name());


@@ -353,10 +388,11 @@ void pkgDPkgPM::DoTerminalPty(int master)
  */
 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 {
  */
 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 {

+   bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);

    // the status we output
    ostringstream status;
 
    // the status we output
    ostringstream status;
 

-   if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+   if (Debug == true)

       std::clog << "got from dpkg '" << line << "'" << std::endl;
 
 
       std::clog << "got from dpkg '" << line << "'" << std::endl;
 
 


@@ -371,6 +407,7 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
       'processing: install: pkg'
       'processing: configure: pkg'
       'processing: remove: pkg'
       'processing: install: pkg'
       'processing: configure: pkg'
       'processing: remove: pkg'

+      'processing: purge: pkg' - but for apt is it a ignored "unknown" action

       'processing: trigproc: trigger'
            
    */
       'processing: trigproc: trigger'
            
    */


@@ -383,28 +420,28 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
    if( list[0] == NULL || list[1] == NULL || list[2] == NULL) 
    {
    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
    if( list[0] == NULL || list[1] == NULL || list[2] == NULL) 
    {

-      if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+      if (Debug == true)

         std::clog << "ignoring line: not enough ':'" << std::endl;
       return;
    }
         std::clog << "ignoring line: not enough ':'" << std::endl;
       return;
    }

-   char *pkg = list[1];
-   char *action = _strstrip(list[2]);
+   const char* const pkg = list[1];
+   const char* action = _strstrip(list[2]);

 
    // 'processing' from dpkg looks like
    // 'processing: action: pkg'
    if(strncmp(list[0], "processing", strlen("processing")) == 0)
    {
       char s[200];
 
    // 'processing' from dpkg looks like
    // 'processing: action: pkg'
    if(strncmp(list[0], "processing", strlen("processing")) == 0)
    {
       char s[200];

-      char *pkg_or_trigger = _strstrip(list[2]);
-      action =_strstrip( list[1]);
+      const char* const pkg_or_trigger = _strstrip(list[2]);
+      action = _strstrip( list[1]);

       const std::pair<const char *, const char *> * const iter =
        std::find_if(PackageProcessingOpsBegin,
                     PackageProcessingOpsEnd,
                     MatchProcessingOp(action));
       if(iter == PackageProcessingOpsEnd)
       {
       const std::pair<const char *, const char *> * const iter =
        std::find_if(PackageProcessingOpsBegin,
                     PackageProcessingOpsEnd,
                     MatchProcessingOp(action));
       if(iter == PackageProcessingOpsEnd)
       {

-        if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
-           std::clog << "ignoring unknwon action: " << action << std::endl;
+        if (Debug == true)
+           std::clog << "ignoring unknown action: " << action << std::endl;

         return;
       }
       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
         return;
       }
       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);


@@ -415,7 +452,7 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
             << endl;
       if(OutStatusFd > 0)
         write(OutStatusFd, status.str().c_str(), status.str().size());
             << endl;
       if(OutStatusFd > 0)
         write(OutStatusFd, status.str().c_str(), status.str().size());

-      if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+      if (Debug == true)

         std::clog << "send: '" << status.str() << "'" << endl;
       return;
    }
         std::clog << "send: '" << status.str() << "'" << endl;
       return;
    }


@@ -428,11 +465,11 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
             << endl;
       if(OutStatusFd > 0)
         write(OutStatusFd, status.str().c_str(), status.str().size());
             << endl;
       if(OutStatusFd > 0)
         write(OutStatusFd, status.str().c_str(), status.str().size());

-      if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+      if (Debug == true)

         std::clog << "send: '" << status.str() << "'" << endl;
       return;
    }
         std::clog << "send: '" << status.str() << "'" << endl;
       return;
    }

-   if(strncmp(action,"conffile",strlen("conffile")) == 0)
+   else if(strncmp(action,"conffile",strlen("conffile")) == 0)

    {
       status << "pmconffile:" << list[1]
             << ":"  << (PackagesDone/float(PackagesTotal)*100.0) 
    {
       status << "pmconffile:" << list[1]
             << ":"  << (PackagesDone/float(PackagesTotal)*100.0) 


@@ -440,12 +477,12 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
             << endl;
       if(OutStatusFd > 0)
         write(OutStatusFd, status.str().c_str(), status.str().size());
             << endl;
       if(OutStatusFd > 0)
         write(OutStatusFd, status.str().c_str(), status.str().size());

-      if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+      if (Debug == true)

         std::clog << "send: '" << status.str() << "'" << endl;
       return;
    }
 
         std::clog << "send: '" << status.str() << "'" << endl;
       return;
    }
 

-   vector<struct DpkgState> &states = PackageOps[pkg];
+   vector<struct DpkgState> const &states = PackageOps[pkg];

    const char *next_action = NULL;
    if(PackageOpsDone[pkg] < states.size())
       next_action = states[PackageOpsDone[pkg]].state;
    const char *next_action = NULL;
    if(PackageOpsDone[pkg] < states.size())
       next_action = states[PackageOpsDone[pkg]].state;


@@ -468,15 +505,15 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
             << endl;
       if(OutStatusFd > 0)
         write(OutStatusFd, status.str().c_str(), status.str().size());
             << endl;
       if(OutStatusFd > 0)
         write(OutStatusFd, status.str().c_str(), status.str().size());

-      if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+      if (Debug == true)

         std::clog << "send: '" << status.str() << "'" << endl;
    }
         std::clog << "send: '" << status.str() << "'" << endl;
    }

-   if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true) 
+   if (Debug == true) 

       std::clog << "(parsed from dpkg) pkg: " << pkg 
                << " action: " << action << endl;
 }
       std::clog << "(parsed from dpkg) pkg: " << pkg 
                << " action: " << action << endl;
 }

-
-// DPkgPM::DoDpkgStatusFd                                              /*{{{*/
+                                                                       /*}}}*/
+// DPkgPM::DoDpkgStatusFd                                              /*{{{*/

 // ---------------------------------------------------------------------
 /*
  */
 // ---------------------------------------------------------------------
 /*
  */


@@ -513,7 +550,7 @@ void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 }
                                                                        /*}}}*/
    dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
 }
                                                                        /*}}}*/

-
+// DPkgPM::OpenLog                                                     /*{{{*/

 bool pkgDPkgPM::OpenLog()
 {
    string logdir = _config->FindDir("Dir::Log");
 bool pkgDPkgPM::OpenLog()
 {
    string logdir = _config->FindDir("Dir::Log");


@@ -524,19 +561,21 @@ bool pkgDPkgPM::OpenLog()
    if (!logfile_name.empty())
    {
       term_out = fopen(logfile_name.c_str(),"a");
    if (!logfile_name.empty())
    {
       term_out = fopen(logfile_name.c_str(),"a");

+      if (term_out == NULL)
+        return _error->WarningE(_("Could not open file '%s'"), logfile_name.c_str());
+

       chmod(logfile_name.c_str(), 0600);
       // output current time
       char outstr[200];
       time_t t = time(NULL);
       struct tm *tmp = localtime(&t);
       strftime(outstr, sizeof(outstr), "%F  %T", tmp);
       chmod(logfile_name.c_str(), 0600);
       // output current time
       char outstr[200];
       time_t t = time(NULL);
       struct tm *tmp = localtime(&t);
       strftime(outstr, sizeof(outstr), "%F  %T", tmp);

-      fprintf(term_out, "\nLog started: ");
-      fprintf(term_out, "%s", outstr);
-      fprintf(term_out, "\n");
+      fprintf(term_out, "\nLog started: %s\n", outstr);

    }
    return true;
 }
    }
    return true;
 }

-
+                                                                       /*}}}*/
+// DPkg::CloseLog                                                      /*{{{*/

 bool pkgDPkgPM::CloseLog()
 {
    if(term_out)
 bool pkgDPkgPM::CloseLog()
 {
    if(term_out)


@@ -553,7 +592,7 @@ bool pkgDPkgPM::CloseLog()
    term_out = NULL;
    return true;
 }
    term_out = NULL;
    return true;
 }

-
+                                                                       /*}}}*/

 /*{{{*/
 // This implements a racy version of pselect for those architectures
 // that don't have a working implementation.
 /*{{{*/
 // This implements a racy version of pselect for those architectures
 // that don't have a working implementation.


@@ -575,7 +614,6 @@ static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
    return retval;
 }
 /*}}}*/
    return retval;
 }
 /*}}}*/

-

 // DPkgPM::Go - Run the sequence                                       /*{{{*/
 // ---------------------------------------------------------------------
 /* This globs the operations and calls dpkg 
 // DPkgPM::Go - Run the sequence                                       /*{{{*/
 // ---------------------------------------------------------------------
 /* This globs the operations and calls dpkg 


@@ -587,9 +625,14 @@ static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 */
 bool pkgDPkgPM::Go(int OutStatusFd)
 {
 */
 bool pkgDPkgPM::Go(int OutStatusFd)
 {

-   unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);   
-   unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
-   bool NoTriggers = _config->FindB("DPkg::NoTriggers",false);
+   fd_set rfds;
+   struct timespec tv;
+   sigset_t sigmask;
+   sigset_t original_sigmask;
+
+   unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
+   unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
+   bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);

 
    if (RunScripts("DPkg::Pre-Invoke") == false)
       return false;
 
    if (RunScripts("DPkg::Pre-Invoke") == false)
       return false;


@@ -597,6 +640,13 @@ bool pkgDPkgPM::Go(int OutStatusFd)
    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
       return false;
 
    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
       return false;
 

+   // support subpressing of triggers processing for special
+   // cases like d-i that runs the triggers handling manually
+   bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
+   bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
+   if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
+      List.push_back(Item(Item::ConfigurePending, PkgIterator()));
+

    // map the dpkg states to the operations that are performed
    // (this is sorted in the same way as Item::Ops)
    static const struct DpkgState DpkgStatesOpMap[][7] = {
    // map the dpkg states to the operations that are performed
    // (this is sorted in the same way as Item::Ops)
    static const struct DpkgState DpkgStatesOpMap[][7] = {


@@ -610,20 +660,12 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       { 
         {"unpacked",N_("Preparing to configure %s") },
         {"half-configured", N_("Configuring %s") },
       { 
         {"unpacked",N_("Preparing to configure %s") },
         {"half-configured", N_("Configuring %s") },

-#if 0
-        {"triggers-awaited", N_("Processing triggers for %s") },
-        {"triggers-pending", N_("Processing triggers for %s") },
-#endif

         { "installed", N_("Installed %s")},
         {NULL, NULL}
       },
       // Remove operation
       { 
         {"half-configured", N_("Preparing for removal of %s")},
         { "installed", N_("Installed %s")},
         {NULL, NULL}
       },
       // Remove operation
       { 
         {"half-configured", N_("Preparing for removal of %s")},

-#if 0
-        {"triggers-awaited", N_("Preparing for removal of %s")},
-        {"triggers-pending", N_("Preparing for removal of %s")},
-#endif

         {"half-installed", N_("Removing %s")},
         {"config-files",  N_("Removed %s")},
         {NULL, NULL}
         {"half-installed", N_("Removing %s")},
         {"config-files",  N_("Removed %s")},
         {NULL, NULL}


@@ -640,16 +682,19 @@ bool pkgDPkgPM::Go(int OutStatusFd)
    // that will be [installed|configured|removed|purged] and add
    // them to the PackageOps map (the dpkg states it goes through)
    // and the PackageOpsTranslations (human readable strings)
    // that will be [installed|configured|removed|purged] and add
    // them to the PackageOps map (the dpkg states it goes through)
    // and the PackageOpsTranslations (human readable strings)

-   for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
+   for (vector<Item>::const_iterator I = List.begin(); I != List.end();I++)

    {
    {

-      string name = (*I).Pkg.Name();
+      if((*I).Pkg.end() == true)
+        continue;
+
+      string const name = (*I).Pkg.Name();

       PackageOpsDone[name] = 0;
       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++) 
       {
         PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
         PackagesTotal++;
       }
       PackageOpsDone[name] = 0;
       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++) 
       {
         PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
         PackagesTotal++;
       }

-   }   
+   }

 
    stdin_is_dev_null = false;
 
 
    stdin_is_dev_null = false;
 


@@ -657,19 +702,42 @@ bool pkgDPkgPM::Go(int OutStatusFd)
    OpenLog();
 
    // this loop is runs once per operation
    OpenLog();
 
    // this loop is runs once per operation

-   for (vector<Item>::iterator I = List.begin(); I != List.end();)
+   for (vector<Item>::const_iterator I = List.begin(); I != List.end();)

    {
    {

-      vector<Item>::iterator J = I;
-      for (; J != List.end() && J->Op == I->Op; J++);
+      // Do all actions with the same Op in one run
+      vector<Item>::const_iterator J = I;
+      if (TriggersPending == true)
+        for (; J != List.end(); J++)
+        {
+           if (J->Op == I->Op)
+              continue;
+           if (J->Op != Item::TriggersPending)
+              break;
+           vector<Item>::const_iterator T = J + 1;
+           if (T != List.end() && T->Op == I->Op)
+              continue;
+           break;
+        }
+      else
+        for (; J != List.end() && J->Op == I->Op; J++)
+           /* nothing */;

 
       // Generate the argument list
       const char *Args[MaxArgs + 50];
 
       // Generate the argument list
       const char *Args[MaxArgs + 50];

+      
+      // Now check if we are within the MaxArgs limit
+      //
+      // this code below is problematic, because it may happen that
+      // the argument list is split in a way that A depends on B
+      // and they are in the same "--configure A B" run
+      // - with the split they may now be configured in different
+      //   runs 

       if (J - I > (signed)MaxArgs)
         J = I + MaxArgs;
       
       unsigned int n = 0;
       unsigned long Size = 0;
       if (J - I > (signed)MaxArgs)
         J = I + MaxArgs;
       
       unsigned int n = 0;
       unsigned long Size = 0;

-      string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
+      string const Tmp = _config->Find("Dir::Bin::dpkg","dpkg");

       Args[n++] = Tmp.c_str();
       Size += strlen(Args[n-1]);
       
       Args[n++] = Tmp.c_str();
       Size += strlen(Args[n-1]);
       


@@ -719,11 +787,23 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         
         case Item::Configure:
         Args[n++] = "--configure";
         
         case Item::Configure:
         Args[n++] = "--configure";

-        if (NoTriggers)
-           Args[n++] = "--no-triggers";

         Size += strlen(Args[n-1]);
         break;
         Size += strlen(Args[n-1]);
         break;

-        
+
+        case Item::ConfigurePending:
+        Args[n++] = "--configure";
+        Size += strlen(Args[n-1]);
+        Args[n++] = "--pending";
+        Size += strlen(Args[n-1]);
+        break;
+
+        case Item::TriggersPending:
+        Args[n++] = "--triggers-only";
+        Size += strlen(Args[n-1]);
+        Args[n++] = "--pending";
+        Size += strlen(Args[n-1]);
+        break;
+

         case Item::Install:
         Args[n++] = "--unpack";
         Size += strlen(Args[n-1]);
         case Item::Install:
         Args[n++] = "--unpack";
         Size += strlen(Args[n-1]);


@@ -731,7 +811,14 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         Size += strlen(Args[n-1]);
         break;
       }
         Size += strlen(Args[n-1]);
         break;
       }

-      
+
+      if (NoTriggers == true && I->Op != Item::TriggersPending &&
+         I->Op != Item::ConfigurePending)
+      {
+        Args[n++] = "--no-triggers";
+        Size += strlen(Args[n-1]);
+      }
+

       // Write in the file or package names
       if (I->Op == Item::Install)
       {
       // Write in the file or package names
       if (I->Op == Item::Install)
       {


@@ -747,6 +834,8 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       {
         for (;I != J && Size < MaxArgBytes; I++)
         {
       {
         for (;I != J && Size < MaxArgBytes; I++)
         {

+           if((*I).Pkg.end() == true)
+              continue;

            Args[n++] = I->Pkg.Name();
            Size += strlen(Args[n-1]);
         }       
            Args[n++] = I->Pkg.Name();
            Size += strlen(Args[n-1]);
         }       


@@ -777,33 +866,51 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
 
       struct   termios tt;
       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
 
       struct   termios tt;

-      struct   termios tt_out;

       struct   winsize win;
       struct   winsize win;

-      int      master;
-      int      slave;
-
-      // FIXME: setup sensible signal handling (*ick*)
-      tcgetattr(0, &tt);
-      tcgetattr(1, &tt_out);
-      ioctl(0, TIOCGWINSZ, (char *)&win);
-      if (openpty(&master, &slave, NULL, &tt_out, &win) < 0) 
+      int      master = -1;
+      int      slave = -1;
+
+      // if tcgetattr does not return zero there was a error
+      // and we do not do any pty magic
+      if (tcgetattr(0, &tt) == 0)

       {
       {

-        const char *s = _("Can not write log, openpty() "
-                          "failed (/dev/pts not mounted?)\n");
-        fprintf(stderr, "%s",s);
-        fprintf(term_out, "%s",s);
-        master = slave = -1;
-      }  else {
-        struct termios rtt;
-        rtt = tt;
-        cfmakeraw(&rtt);
-        rtt.c_lflag &= ~ECHO;
-        tcsetattr(0, TCSAFLUSH, &rtt);
+        ioctl(0, TIOCGWINSZ, (char *)&win);
+        if (openpty(&master, &slave, NULL, &tt, &win) < 0) 
+        {
+           const char *s = _("Can not write log, openpty() "
+                             "failed (/dev/pts not mounted?)\n");
+           fprintf(stderr, "%s",s);
+            if(term_out)
+              fprintf(term_out, "%s",s);
+           master = slave = -1;
+        }  else {
+           struct termios rtt;
+           rtt = tt;
+           cfmakeraw(&rtt);
+           rtt.c_lflag &= ~ECHO;
+           // block SIGTTOU during tcsetattr to prevent a hang if
+           // the process is a member of the background process group
+           // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
+           sigemptyset(&sigmask);
+           sigaddset(&sigmask, SIGTTOU);
+           sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
+           tcsetattr(0, TCSAFLUSH, &rtt);
+           sigprocmask(SIG_SETMASK, &original_sigmask, 0);
+        }

       }
 
        // Fork dpkg
       pid_t Child;
       _config->Set("APT::Keep-Fds::",fd[1]);
       }
 
        // Fork dpkg
       pid_t Child;
       _config->Set("APT::Keep-Fds::",fd[1]);

+      // send status information that we are about to fork dpkg
+      if(OutStatusFd > 0) {
+        ostringstream status;
+        status << "pmstatus:dpkg-exec:" 
+               << (PackagesDone/float(PackagesTotal)*100.0) 
+               << ":" << _("Running dpkg")
+               << endl;
+        write(OutStatusFd, status.str().c_str(), status.str().size());
+      }

       Child = ExecFork();
             
       // This is the child
       Child = ExecFork();
             
       // This is the child


@@ -821,6 +928,15 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         }
         close(fd[0]); // close the read end of the pipe
 
         }
         close(fd[0]); // close the read end of the pipe
 

+        if (_config->FindDir("DPkg::Chroot-Directory","/") != "/") 
+        {
+           std::cerr << "Chrooting into " 
+                     << _config->FindDir("DPkg::Chroot-Directory") 
+                     << std::endl;
+           if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0)
+              _exit(100);
+        }
+

         if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
            _exit(100);
         
         if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
            _exit(100);
         


@@ -840,7 +956,6 @@ bool pkgDPkgPM::Go(int OutStatusFd)
               _exit(100);
         }
 
               _exit(100);
         }
 

-

         /* No Job Control Stop Env is a magic dpkg var that prevents it
            from using sigstop */
         putenv((char *)"DPKG_NO_TSTP=yes");
         /* No Job Control Stop Env is a magic dpkg var that prevents it
            from using sigstop */
         putenv((char *)"DPKG_NO_TSTP=yes");


@@ -849,6 +964,10 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         _exit(100);
       }      
 
         _exit(100);
       }      
 

+      // apply ionice
+      if (_config->FindB("DPkg::UseIoNice", false) == true)
+        ionice(Child);
+

       // clear the Keep-Fd again
       _config->Clear("APT::Keep-Fds",fd[1]);
 
       // clear the Keep-Fd again
       _config->Clear("APT::Keep-Fds",fd[1]);
 


@@ -856,22 +975,18 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       int Status = 0;
 
       // we read from dpkg here
       int Status = 0;
 
       // we read from dpkg here

-      int _dpkgin = fd[0];
+      int const _dpkgin = fd[0];

       close(fd[1]);                        // close the write end of the pipe
 
       close(fd[1]);                        // close the write end of the pipe
 

-      // the result of the waitpid call
-      int res;

       if(slave > 0)
         close(slave);
 
       // setups fds
       if(slave > 0)
         close(slave);
 
       // setups fds

-      fd_set rfds;
-      struct timespec tv;
-      sigset_t sigmask;
-      sigset_t original_sigmask;

       sigemptyset(&sigmask);
       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
 
       sigemptyset(&sigmask);
       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
 

+      // the result of the waitpid call
+      int res;

       int select_ret;
       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
         if(res < 0) {
       int select_ret;
       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
         if(res < 0) {


@@ -890,7 +1005,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 
         // wait for input or output here
         FD_ZERO(&rfds);
 
         // wait for input or output here
         FD_ZERO(&rfds);

-        if (!stdin_is_dev_null)
+        if (master >= 0 && !stdin_is_dev_null)

            FD_SET(0, &rfds); 
         FD_SET(_dpkgin, &rfds);
         if(master >= 0)
            FD_SET(0, &rfds); 
         FD_SET(_dpkgin, &rfds);
         if(master >= 0)


@@ -938,7 +1053,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         // if it was set to "keep-dpkg-runing" then we won't return
         // here but keep the loop going and just report it as a error
         // for later
         // if it was set to "keep-dpkg-runing" then we won't return
         // here but keep the loop going and just report it as a error
         // for later

-        bool stopOnError = _config->FindB("Dpkg::StopOnError",true);
+        bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);

         
         if(stopOnError)
            RunScripts("DPkg::Post-Invoke");
         
         if(stopOnError)
            RunScripts("DPkg::Post-Invoke");