cherry pick -r1847 from bzr+ssh://bazaar.launchpad.net/~mvo/apt/lp346386/

[apt.git] / apt-pkg / contrib / fileutl.cc

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index c7f78cdfba787fecd21251c3fd3f7672c69cba05..960616f33a29d837d070a6bc842bad5673162175 100644 (file)
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -852,6 +852,26 @@ bool ExecWait(pid_t Pid,const char *Name,bool Reap)
 }
                                                                        /*}}}*/
 
+// StartsWithGPGClearTextSignature - Check if a file is Pgp/GPG clearsigned     /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool StartsWithGPGClearTextSignature(string const &FileName)
+{
+   static const char* SIGMSG = "-----BEGIN PGP SIGNED MESSAGE-----\n";
+   char buffer[strlen(SIGMSG)+1];
+   FILE* gpg = fopen(FileName.c_str(), "r");
+   if (gpg == NULL)
+      return false;
+
+   char const * const test = fgets(buffer, sizeof(buffer), gpg);
+   fclose(gpg);
+   if (test == NULL || strcmp(buffer, SIGMSG) != 0)
+      return false;
+
+   return true;
+}
+
+
 // FileFd::Open - Open a file                                          /*{{{*/
 // ---------------------------------------------------------------------
 /* The most commonly used open mode combinations are given with Mode */
@@ -1024,7 +1044,20 @@ bool FileFd::OpenDescriptor(int Fd, unsigned int const Mode, APT::Configuration:
 {
    Close();
    Flags = (AutoClose) ? FileFd::AutoClose : 0;
-   iFd = Fd;
+   if (AutoClose == false && (
+#ifdef HAVE_ZLIB
+       compressor.Name == "gzip" ||
+#endif
+#ifdef HAVE_BZ2
+       compressor.Name == "bzip2" ||
+#endif
+       false))
+   {
+      // Need to duplicate fd here or gzclose for cleanup will close the fd as well
+      iFd = dup(Fd);
+   }
+   else
+      iFd = Fd;
    this->FileName = "";
    if (OpenInternDescriptor(Mode, compressor) == false)
    {
@@ -1183,8 +1216,6 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
       close(Pipe[0]);
    else
       close(Pipe[1]);
-   if ((Comp == true || FileName.empty() == true) && d->compressed_fd != -1)
-      close(d->compressed_fd);
 
    return true;
 }
@@ -1712,7 +1743,7 @@ bool FileFd::Close()
       }
    }
 
-   if ((Flags & Replace) == Replace && iFd >= 0) {
+   if ((Flags & Replace) == Replace) {
       if (rename(TemporaryFileName.c_str(), FileName.c_str()) != 0)
         Res &= _error->Errno("rename",_("Problem renaming the file %s to %s"), TemporaryFileName.c_str(), FileName.c_str());