* apt-inst/deb/debfile.h:

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

diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc
index aa184b13022cb3f9ddd654ac8fbe1c565eb1bc3a..160718ea5ae503caf1848afd63514fbeae0d9a4d 100644 (file)
--- a/apt-pkg/contrib/mmap.cc
+++ b/apt-pkg/contrib/mmap.cc
@@ -17,10 +17,11 @@
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
 #define _BSD_SOURCE
+#include <config.h>
+
 #include <apt-pkg/mmap.h>
 #include <apt-pkg/error.h>
-
-#include <apti18n.h>
+#include <apt-pkg/fileutl.h>
 
 #include <sys/mman.h>
 #include <sys/stat.h>
@@ -28,9 +29,10 @@
 #include <fcntl.h>
 #include <stdlib.h>
 #include <errno.h>
-
 #include <cstring>
-                                                                       /*}}}*/
+
+#include <apti18n.h>
+                                                                       /*}}}*/
 
 // MMap::MMap - Constructor                                            /*{{{*/
 // ---------------------------------------------------------------------
@@ -64,7 +66,7 @@ MMap::~MMap()
 bool MMap::Map(FileFd &Fd)
 {
    iSize = Fd.Size();
-   
+
    // Set the permissions.
    int Prot = PROT_READ;
    int Map = MAP_SHARED;
@@ -75,7 +77,18 @@ bool MMap::Map(FileFd &Fd)
    
    if (iSize == 0)
       return _error->Error(_("Can't mmap an empty file"));
-   
+
+   // We can't mmap compressed fd's directly, so we need to read it completely
+   if (Fd.IsCompressed() == true)
+   {
+      if ((Flags & ReadOnly) != ReadOnly)
+        return _error->Error("Compressed file %s can only be mapped readonly", Fd.Name().c_str());
+      Base = new unsigned char[iSize];
+      if (Fd.Seek(0L) == false || Fd.Read(Base, iSize) == false)
+        return _error->Error("Compressed file %s can't be read into mmap", Fd.Name().c_str());
+      return true;
+   }
+
    // Map it.
    Base = mmap(0,iSize,Prot,Map,Fd.Fd(),0);
    if (Base == (void *)-1)
@@ -84,6 +97,13 @@ bool MMap::Map(FileFd &Fd)
       {
         // The filesystem doesn't support this particular kind of mmap.
         // So we allocate a buffer and read the whole file into it.
+        if ((Flags & ReadOnly) == ReadOnly)
+        {
+           // for readonly, we don't need sync, so make it simple
+           Base = new unsigned char[iSize];
+           return Fd.Read(Base, iSize);
+        }
+        // FIXME: Writing to compressed fd's ?
         int const dupped_fd = dup(Fd.Fd());
         if (dupped_fd == -1)
            return _error->Errno("mmap", _("Couldn't duplicate file descriptor %i"), Fd.Fd());
@@ -94,7 +114,7 @@ bool MMap::Map(FileFd &Fd)
            return false;
       }
       else
-        return _error->Errno("mmap",_("Couldn't make mmap of %lu bytes"),
+        return _error->Errno("mmap",_("Couldn't make mmap of %llu bytes"),
                              iSize);
      }
 
@@ -106,7 +126,7 @@ bool MMap::Map(FileFd &Fd)
 /* */
 bool MMap::Close(bool DoSync)
 {
-   if ((Flags & UnMapped) == UnMapped || Base == 0 || iSize == 0)
+   if ((Flags & UnMapped) == UnMapped || validData() == false || iSize == 0)
       return true;
    
    if (DoSync == true)
@@ -165,7 +185,7 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
       return true;
    
 #ifdef _POSIX_SYNCHRONIZED_IO
-   unsigned long PSize = sysconf(_SC_PAGESIZE);
+   unsigned long long PSize = sysconf(_SC_PAGESIZE);
    if ((Flags & ReadOnly) != ReadOnly)
    {
       if (SyncToFd != 0)
@@ -176,7 +196,7 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
       }
       else
       {
-        if (msync((char *)Base+(int)(Start/PSize)*PSize,Stop - Start,MS_SYNC) < 0)
+        if (msync((char *)Base+(unsigned long long)(Start/PSize)*PSize,Stop - Start,MS_SYNC) < 0)
            return _error->Errno("msync", _("Unable to synchronize mmap"));
       }
    }
@@ -196,7 +216,7 @@ DynamicMMap::DynamicMMap(FileFd &F,unsigned long Flags,unsigned long const &Work
    if (_error->PendingError() == true)
       return;
    
-   unsigned long EndOfFile = Fd->Size();
+   unsigned long long EndOfFile = Fd->Size();
    if (EndOfFile > WorkSpace)
       WorkSpace = EndOfFile;
    else if(WorkSpace > 0)
@@ -237,11 +257,19 @@ DynamicMMap::DynamicMMap(unsigned long Flags,unsigned long const &WorkSpace,
        if ((this->Flags & Fallback) != Fallback) {
                // Set the permissions.
                int Prot = PROT_READ;
+#ifdef MAP_ANONYMOUS
                int Map = MAP_PRIVATE | MAP_ANONYMOUS;
+#else
+               int Map = MAP_PRIVATE | MAP_ANON;
+#endif
                if ((this->Flags & ReadOnly) != ReadOnly)
                        Prot |= PROT_WRITE;
                if ((this->Flags & Public) == Public)
+#ifdef MAP_ANONYMOUS
                        Map = MAP_SHARED | MAP_ANONYMOUS;
+#else
+                       Map = MAP_SHARED | MAP_ANON;
+#endif
 
                // use anonymous mmap() to get the memory
                Base = (unsigned char*) mmap(0, WorkSpace, Prot, Map, -1, 0);
@@ -266,6 +294,8 @@ DynamicMMap::~DynamicMMap()
 {
    if (Fd == 0)
    {
+      if (validData() == false)
+        return;
 #ifdef _POSIX_MAPPED_FILES
       munmap(Base, WorkSpace);
 #else
@@ -274,7 +304,7 @@ DynamicMMap::~DynamicMMap()
       return;
    }
    
-   unsigned long EndOfFile = iSize;
+   unsigned long long EndOfFile = iSize;
    iSize = WorkSpace;
    Close(false);
    if(ftruncate(Fd->Fd(),EndOfFile) < 0)
@@ -284,9 +314,9 @@ DynamicMMap::~DynamicMMap()
 // DynamicMMap::RawAllocate - Allocate a raw chunk of unaligned space  /*{{{*/
 // ---------------------------------------------------------------------
 /* This allocates a block of memory aligned to the given size */
-unsigned long DynamicMMap::RawAllocate(unsigned long Size,unsigned long Aln)
+unsigned long DynamicMMap::RawAllocate(unsigned long long Size,unsigned long Aln)
 {
-   unsigned long Result = iSize;
+   unsigned long long Result = iSize;
    if (Aln != 0)
       Result += Aln - (iSize%Aln);
 
@@ -398,8 +428,10 @@ bool DynamicMMap::Grow() {
        if (Limit != 0 && WorkSpace >= Limit)
                return _error->Error(_("Unable to increase the size of the MMap as the "
                                       "limit of %lu bytes is already reached."), Limit);
+       if (GrowFactor <= 0)
+               return _error->Error(_("Unable to increase size of the MMap as automatic growing is disabled by user."));
 
-       unsigned long const newSize = WorkSpace + GrowFactor;
+       unsigned long long const newSize = WorkSpace + GrowFactor;
 
        if(Fd != 0) {
                Fd->Seek(newSize - 1);