diff options
Diffstat (limited to 'apt-pkg/contrib/mmap.cc')
| -rw-r--r-- | apt-pkg/contrib/mmap.cc | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc index 229b18037..917466c2f 100644 --- a/apt-pkg/contrib/mmap.cc +++ b/apt-pkg/contrib/mmap.cc @@ -137,7 +137,6 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop) } /*}}}*/ - /*}}}*/ // DynamicMMap::DynamicMMap - Constructor /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -173,11 +172,19 @@ DynamicMMap::DynamicMMap(unsigned long Flags,unsigned long WorkSpace) : return; #ifdef _POSIX_MAPPED_FILES + // Set the permissions. + int Prot = PROT_READ; + int Map = MAP_PRIVATE | MAP_ANONYMOUS; + if ((Flags & ReadOnly) != ReadOnly) + Prot |= PROT_WRITE; + if ((Flags & Public) == Public) + Map = MAP_SHARED | MAP_ANONYMOUS; + // use anonymous mmap() to get the memory - Base = (unsigned char*) mmap(0, WorkSpace, PROT_READ|PROT_WRITE, - MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); + Base = (unsigned char*) mmap(0, WorkSpace, Prot, Map, -1, 0); + if(Base == MAP_FAILED) - return; + _error->Errno("DynamicMMap",_("Couldn't make mmap of %lu bytes"),WorkSpace); #else // fallback to a static allocated space Base = new unsigned char[WorkSpace]; |