* Applied patch from Peter Eisentraut <peter_e@gmx.net> to fix a

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

diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc
index 230e133a55cbbb7c75d436e20ae45106147f302c..abcae46feee411e0beb7b7bd97a057bf7264ff7a 100644 (file)
--- a/apt-pkg/contrib/mmap.cc
+++ b/apt-pkg/contrib/mmap.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: mmap.cc,v 1.20 1999/10/02 04:14:54 jgg Exp $
+// $Id: mmap.cc,v 1.22 2001/05/27 05:19:30 jgg Exp $
 /* ######################################################################
    
    MMap Class - Provides 'real' mmap or a faked mmap using read().
@@ -21,18 +21,18 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/mmap.h"
-#endif 
-
 #define _BSD_SOURCE
 #include <apt-pkg/mmap.h>
 #include <apt-pkg/error.h>
 
+#include <apti18n.h>
+
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
+
+#include <cstring>
                                                                        /*}}}*/
 
 // MMap::MMap - Constructor                                            /*{{{*/
@@ -77,12 +77,12 @@ bool MMap::Map(FileFd &Fd)
       Map = MAP_PRIVATE;
    
    if (iSize == 0)
-      return _error->Error("Can't mmap an empty file");
+      return _error->Error(_("Can't mmap an empty file"));
    
    // Map it.
    Base = mmap(0,iSize,Prot,Map,Fd.Fd(),0);
    if (Base == (void *)-1)
-      return _error->Errno("mmap","Couldn't make mmap of %u bytes",iSize);
+      return _error->Errno("mmap",_("Couldn't make mmap of %lu bytes"),iSize);
 
    return true;
 }
@@ -102,6 +102,7 @@ bool MMap::Close(bool DoSync)
       _error->Warning("Unable to munmap");
    
    iSize = 0;
+   Base = 0;
    return true;
 }
                                                                        /*}}}*/
@@ -116,7 +117,7 @@ bool MMap::Sync()
    
 #ifdef _POSIX_SYNCHRONIZED_IO   
    if ((Flags & ReadOnly) != ReadOnly)
-      if (msync((char *)Base,iSize,MS_SYNC) != 0)
+      if (msync((char *)Base,iSize,MS_SYNC) < 0)
         return _error->Errno("msync","Unable to write mmap");
 #endif   
    return true;
@@ -133,7 +134,7 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
 #ifdef _POSIX_SYNCHRONIZED_IO
    unsigned long PSize = sysconf(_SC_PAGESIZE);
    if ((Flags & ReadOnly) != ReadOnly)
-      if (msync((char *)Base+(int)(Start/PSize)*PSize,Stop - Start,MS_SYNC) != 0)
+      if (msync((char *)Base+(int)(Start/PSize)*PSize,Stop - Start,MS_SYNC) < 0)
         return _error->Errno("msync","Unable to write mmap");
 #endif   
    return true;
@@ -150,9 +151,15 @@ DynamicMMap::DynamicMMap(FileFd &F,unsigned long Flags,unsigned long WorkSpace)
       return;
    
    unsigned long EndOfFile = Fd->Size();
-   Fd->Seek(WorkSpace);
-   char C = 0;
-   Fd->Write(&C,sizeof(C));
+   if (EndOfFile > WorkSpace)
+      WorkSpace = EndOfFile;
+   else if(WorkSpace > 0)
+   {
+      Fd->Seek(WorkSpace - 1);
+      char C = 0;
+      Fd->Write(&C,sizeof(C));
+   }
+   
    Map(F);
    iSize = EndOfFile;
 }
@@ -167,6 +174,7 @@ DynamicMMap::DynamicMMap(unsigned long Flags,unsigned long WorkSpace) :
       return;
    
    Base = new unsigned char[WorkSpace];
+   memset(Base,0,WorkSpace);
    iSize = 0;
 }
                                                                        /*}}}*/
@@ -182,11 +190,9 @@ DynamicMMap::~DynamicMMap()
    }
    
    unsigned long EndOfFile = iSize;
-   Sync();
    iSize = WorkSpace;
    Close(false);
    ftruncate(Fd->Fd(),EndOfFile);
-   Fd->Close();
 }  
                                                                        /*}}}*/
 // DynamicMMap::RawAllocate - Allocate a raw chunk of unaligned space  /*{{{*/