* apt-pkg/pkgcache.cc:

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

diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index 85cf4e11933ab6ce653ff82f8e63e71e3dac5460..f787f365e6ddb97a24fe99f1d8b83ae8d6f8dda6 100644 (file)
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -74,6 +74,31 @@ 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                                     /*{{{*/
 // ---------------------------------------------------------------------
 /* */


@@ -587,6 +612,11 @@ static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 */
 bool pkgDPkgPM::Go(int OutStatusFd)
 {
 */
 bool pkgDPkgPM::Go(int OutStatusFd)
 {

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

    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);
    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);


@@ -610,20 +640,12 @@ 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}


@@ -660,10 +682,19 @@ bool pkgDPkgPM::Go(int OutStatusFd)
    for (vector<Item>::iterator I = List.begin(); I != List.end();)
    {
       vector<Item>::iterator J = I;
    for (vector<Item>::iterator I = List.begin(); I != List.end();)
    {
       vector<Item>::iterator J = I;

-      for (; J != List.end() && J->Op == I->Op; J++);
+      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;
       
       if (J - I > (signed)MaxArgs)
         J = I + MaxArgs;
       


@@ -773,17 +804,18 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 
       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
 

+      // ignore SIGHUP as well (debian #463030)
+      sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
+

       struct   termios tt;
       struct   termios tt;

-      struct   termios tt_out;

       struct   winsize win;
       int      master;
       int      slave;
 
       // FIXME: setup sensible signal handling (*ick*)
       tcgetattr(0, &tt);
       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);
       ioctl(0, TIOCGWINSZ, (char *)&win);

-      if (openpty(&master, &slave, NULL, &tt_out, &win) < 0) 
+      if (openpty(&master, &slave, NULL, &tt, &win) < 0) 

       {
         const char *s = _("Can not write log, openpty() "
                           "failed (/dev/pts not mounted?)\n");
       {
         const char *s = _("Can not write log, openpty() "
                           "failed (/dev/pts not mounted?)\n");


@@ -795,12 +827,28 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         rtt = tt;
         cfmakeraw(&rtt);
         rtt.c_lflag &= ~ECHO;
         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);
         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


@@ -818,6 +866,15 @@ 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);
         


@@ -837,7 +894,6 @@ 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");


@@ -846,6 +902,10 @@ 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]);
 


@@ -862,10 +922,6 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         close(slave);
 
       // setups fds
         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);
 


@@ -881,6 +937,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
            // Restore sig int/quit
            signal(SIGQUIT,old_SIGQUIT);
            signal(SIGINT,old_SIGINT);
            // Restore sig int/quit
            signal(SIGQUIT,old_SIGQUIT);
            signal(SIGINT,old_SIGINT);

+           signal(SIGHUP,old_SIGHUP);

            return _error->Errno("waitpid","Couldn't wait for subprocess");
         }
 
            return _error->Errno("waitpid","Couldn't wait for subprocess");
         }
 


@@ -920,6 +977,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       // Restore sig int/quit
       signal(SIGQUIT,old_SIGQUIT);
       signal(SIGINT,old_SIGINT);
       // Restore sig int/quit
       signal(SIGQUIT,old_SIGQUIT);
       signal(SIGINT,old_SIGINT);

+      signal(SIGHUP,old_SIGHUP);

 
       if(master >= 0) 
       {
 
       if(master >= 0) 
       {