merged from lp:~donkult/apt/experimental/

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

diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index 2c34465c092fee4a1241b62649d3443a6760bd00..4dc0baa5049c552290bb8300c05c4d259dcccd92 100644 (file)
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -18,6 +18,7 @@
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/cachefile.h>
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/cachefile.h>

+#include <apt-pkg/packagemanager.h>

 
 #include <unistd.h>
 #include <stdlib.h>
 
 #include <unistd.h>
 #include <stdlib.h>


@@ -107,7 +108,7 @@ ionice(int PID)
 {
    if (!FileExists("/usr/bin/ionice"))
       return false;
 {
    if (!FileExists("/usr/bin/ionice"))
       return false;

-   pid_t Process = ExecFork();      
+   pid_t Process = ExecFork();

    if (Process == 0)
    {
       char buf[32];
    if (Process == 0)
    {
       char buf[32];


@@ -828,6 +829,40 @@ static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 */
 bool pkgDPkgPM::Go(int OutStatusFd)
 {
 */
 bool pkgDPkgPM::Go(int OutStatusFd)
 {

+   // Generate the base argument list for dpkg
+   std::vector<const char *> Args;
+   unsigned long StartSize = 0;
+   string const Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
+   Args.push_back(Tmp.c_str());
+   StartSize += Tmp.length();
+
+   // Stick in any custom dpkg options
+   Configuration::Item const *Opts = _config->Tree("DPkg::Options");
+   if (Opts != 0)
+   {
+      Opts = Opts->Child;
+      for (; Opts != 0; Opts = Opts->Next)
+      {
+        if (Opts->Value.empty() == true)
+           continue;
+        Args.push_back(Opts->Value.c_str());
+        StartSize += Opts->Value.length();
+      }
+   }
+
+   size_t const BaseArgs = Args.size();
+   // we need to detect if we can qualify packages with the architecture or not
+   Args.push_back("--assert-multi-arch");
+   Args.push_back(NULL);
+
+   pid_t dpkgAssertMultiArch = ExecFork();
+   if (dpkgAssertMultiArch == 0)
+   {
+      execv(Args[0], (char**) &Args[0]);
+      _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
+      _exit(2);
+   }
+

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


@@ -904,6 +939,21 @@ bool pkgDPkgPM::Go(int OutStatusFd)
    // create log
    OpenLog();
 
    // create log
    OpenLog();
 

+   bool dpkgMultiArch = false;
+   if (dpkgAssertMultiArch > 0)
+   {
+      int Status = 0;
+      while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
+      {
+        if (errno == EINTR)
+           continue;
+        _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
+        break;
+      }
+      if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
+        dpkgMultiArch = true;
+   }
+

    // this loop is runs once per operation
    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
    {
    // this loop is runs once per operation
    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
    {


@@ -925,11 +975,12 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         for (; J != List.end() && J->Op == I->Op; ++J)
            /* nothing */;
 
         for (; J != List.end() && J->Op == I->Op; ++J)
            /* nothing */;
 

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

       // keep track of allocated strings for multiarch package names
       // keep track of allocated strings for multiarch package names

-      char *Packages[MaxArgs + 50];
-      unsigned int pkgcount = 0;
+      std::vector<char *> Packages;
+
+      // start with the baseset of arguments
+      unsigned long Size = StartSize;
+      Args.erase(Args.begin() + BaseArgs, Args.end());

 
       // Now check if we are within the MaxArgs limit
       //
 
       // Now check if we are within the MaxArgs limit
       //


@@ -937,93 +988,73 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       // 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
       // 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 
+      //   runs, using Immediate-Configure-All can help prevent this.

       if (J - I > (signed)MaxArgs)
       if (J - I > (signed)MaxArgs)

+      {

         J = I + MaxArgs;
         J = I + MaxArgs;

-      
-      unsigned int n = 0;
-      unsigned long Size = 0;
-      string const Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
-      Args[n++] = Tmp.c_str();
-      Size += strlen(Args[n-1]);
-      
-      // Stick in any custom dpkg options
-      Configuration::Item const *Opts = _config->Tree("DPkg::Options");
-      if (Opts != 0)
+        unsigned long const size = MaxArgs + 10;
+        Args.reserve(size);
+        Packages.reserve(size);
+      }
+      else

       {
       {

-        Opts = Opts->Child;
-        for (; Opts != 0; Opts = Opts->Next)
-        {
-           if (Opts->Value.empty() == true)
-              continue;
-           Args[n++] = Opts->Value.c_str();
-           Size += Opts->Value.length();
-        }       
+        unsigned long const size = (J - I) + 10;
+        Args.reserve(size);
+        Packages.reserve(size);

       }
       }

-      
-      char status_fd_buf[20];
+

       int fd[2];
       pipe(fd);
       int fd[2];
       pipe(fd);

-      
-      Args[n++] = "--status-fd";
-      Size += strlen(Args[n-1]);
+
+#define ADDARG(X) Args.push_back(X); Size += strlen(X)
+#define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
+
+      ADDARGC("--status-fd");
+      char status_fd_buf[20];

       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);

-      Args[n++] = status_fd_buf;
-      Size += strlen(Args[n-1]);
+      ADDARG(status_fd_buf);
+      unsigned long const Op = I->Op;

 
       switch (I->Op)
       {
         case Item::Remove:
 
       switch (I->Op)
       {
         case Item::Remove:

-        Args[n++] = "--force-depends";
-        Size += strlen(Args[n-1]);
-        Args[n++] = "--force-remove-essential";
-        Size += strlen(Args[n-1]);
-        Args[n++] = "--remove";
-        Size += strlen(Args[n-1]);
+        ADDARGC("--force-depends");
+        ADDARGC("--force-remove-essential");
+        ADDARGC("--remove");

         break;
         
         case Item::Purge:
         break;
         
         case Item::Purge:

-        Args[n++] = "--force-depends";
-        Size += strlen(Args[n-1]);
-        Args[n++] = "--force-remove-essential";
-        Size += strlen(Args[n-1]);
-        Args[n++] = "--purge";
-        Size += strlen(Args[n-1]);
+        ADDARGC("--force-depends");
+        ADDARGC("--force-remove-essential");
+        ADDARGC("--purge");

         break;
         
         case Item::Configure:
         break;
         
         case Item::Configure:

-        Args[n++] = "--configure";
-        Size += strlen(Args[n-1]);
+        ADDARGC("--configure");

         break;
 
         case Item::ConfigurePending:
         break;
 
         case Item::ConfigurePending:

-        Args[n++] = "--configure";
-        Size += strlen(Args[n-1]);
-        Args[n++] = "--pending";
-        Size += strlen(Args[n-1]);
+        ADDARGC("--configure");
+        ADDARGC("--pending");

         break;
 
         case Item::TriggersPending:
         break;
 
         case Item::TriggersPending:

-        Args[n++] = "--triggers-only";
-        Size += strlen(Args[n-1]);
-        Args[n++] = "--pending";
-        Size += strlen(Args[n-1]);
+        ADDARGC("--triggers-only");
+        ADDARGC("--pending");

         break;
 
         case Item::Install:
         break;
 
         case Item::Install:

-        Args[n++] = "--unpack";
-        Size += strlen(Args[n-1]);
-        Args[n++] = "--auto-deconfigure";
-        Size += strlen(Args[n-1]);
+        ADDARGC("--unpack");
+        ADDARGC("--auto-deconfigure");

         break;
       }
 
       if (NoTriggers == true && I->Op != Item::TriggersPending &&
          I->Op != Item::ConfigurePending)
       {
         break;
       }
 
       if (NoTriggers == true && I->Op != Item::TriggersPending &&
          I->Op != Item::ConfigurePending)
       {

-        Args[n++] = "--no-triggers";
-        Size += strlen(Args[n-1]);
+        ADDARGC("--no-triggers");

       }
       }

+#undef ADDARGC

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


@@ -1032,10 +1063,10 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         {
            if (I->File[0] != '/')
               return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
         {
            if (I->File[0] != '/')
               return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());

-           Args[n++] = I->File.c_str();
-           Size += strlen(Args[n-1]);
+           Args.push_back(I->File.c_str());
+           Size += I->File.length();

         }
         }

-      }      
+      }

       else
       {
         string const nativeArch = _config->Find("APT::Architecture");
       else
       {
         string const nativeArch = _config->Find("APT::Architecture");


@@ -1046,30 +1077,37 @@ bool pkgDPkgPM::Go(int OutStatusFd)
               continue;
            if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
               continue;
               continue;
            if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
               continue;

-           if (I->Pkg.Arch() == nativeArch || !strcmp(I->Pkg.Arch(), "all"))
-              Args[n++] = I->Pkg.Name();
+           // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
+           if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch || !strcmp(I->Pkg.Arch(), "all")))
+           {
+              char const * const name = I->Pkg.Name();
+              ADDARG(name);
+           }

            else
            {
            else
            {

-              Packages[pkgcount] = strdup(I->Pkg.FullName(false).c_str());
-              Args[n++] = Packages[pkgcount++];
+              char * const fullname = strdup(I->Pkg.FullName(false).c_str());
+              Packages.push_back(fullname);
+              ADDARG(fullname);

            }
            }

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

         }
         // skip configure action if all sheduled packages disappeared
         if (oldSize == Size)
            continue;
       }
         }
         // skip configure action if all sheduled packages disappeared
         if (oldSize == Size)
            continue;
       }

-      Args[n] = 0;
+#undef ADDARG
+

       J = I;
       
       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
       {
       J = I;
       
       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
       {

-        for (unsigned int k = 0; k != n; k++)
-           clog << Args[k] << ' ';
+        for (std::vector<const char *>::const_iterator a = Args.begin();
+             a != Args.end(); ++a)
+           clog << *a << ' ';

         clog << endl;
         continue;
       }
         clog << endl;
         continue;
       }

-      
+      Args.push_back(NULL);
+

       cout << flush;
       clog << flush;
       cerr << flush;
       cout << flush;
       clog << flush;
       cerr << flush;


@@ -1079,8 +1117,13 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         it to all processes in the group. Since dpkg ignores the signal 
         it doesn't die but we do! So we must also ignore it */
       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
         it to all processes in the group. Since dpkg ignores the signal 
         it doesn't die but we do! So we must also ignore it */
       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);

-      sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
-
+      sighandler_t old_SIGINT = signal(SIGINT,SigINT);
+      
+      // Check here for any SIGINT
+      if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install)) 
+         break;
+      
+      

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


@@ -1118,7 +1161,6 @@ bool pkgDPkgPM::Go(int OutStatusFd)
            sigprocmask(SIG_SETMASK, &original_sigmask, 0);
         }
       }
            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]);


@@ -1179,7 +1221,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         /* 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");

-        execvp(Args[0],(char **)Args);
+        execvp(Args[0], (char**) &Args[0]);

         cerr << "Could not exec dpkg!" << endl;
         _exit(100);
       }      
         cerr << "Could not exec dpkg!" << endl;
         _exit(100);
       }      


@@ -1205,10 +1247,11 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       sigemptyset(&sigmask);
       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
 
       sigemptyset(&sigmask);
       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
 

-      /* clean up the temporary allocation for multiarch package names in
-         the parent, so we don't leak memory when we return. */
-      for (unsigned int i = 0; i < pkgcount; i++)
-        free(Packages[i]);
+      /* free vectors (and therefore memory) as we don't need the included data anymore */
+      for (std::vector<char *>::const_iterator p = Packages.begin();
+          p != Packages.end(); ++p)
+        free(*p);
+      Packages.clear();

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


@@ -1224,6 +1267,7 @@ 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");
         }
            signal(SIGHUP,old_SIGHUP);
            return _error->Errno("waitpid","Couldn't wait for subprocess");
         }


@@ -1264,6 +1308,7 @@ 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) 
       signal(SIGHUP,old_SIGHUP);
 
       if(master >= 0) 


@@ -1301,6 +1346,9 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       }      
    }
    CloseLog();
       }      
    }
    CloseLog();

+   
+   if (pkgPackageManager::SigINTStop)
+       _error->Warning(_("Operation was interrupted before it could finish"));

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


@@ -1325,6 +1373,11 @@ bool pkgDPkgPM::Go(int OutStatusFd)
    Cache.writeStateFile(NULL);
    return true;
 }
    Cache.writeStateFile(NULL);
    return true;
 }

+
+void SigINT(int sig) {
+   if (_config->FindB("APT::Immediate-Configure-All",false)) 
+      pkgPackageManager::SigINTStop = true;
+} 

                                                                        /*}}}*/
 // pkgDpkgPM::Reset - Dump the contents of the command list            /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // pkgDpkgPM::Reset - Dump the contents of the command list            /*{{{*/
 // ---------------------------------------------------------------------