diff options
Diffstat (limited to 'apt-pkg/contrib')
| -rw-r--r-- | apt-pkg/contrib/mmap.cc | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc index ba4482131..aa52b4c30 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 /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -173,15 +172,24 @@ 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); - if(Base != MAP_FAILED) - return; -#endif + Base = (unsigned char*) mmap(0, WorkSpace, Prot, Map, -1, 0); + + if(Base == MAP_FAILED) + _error->Errno("DynamicMMap",_("Couldn't make mmap of %lu bytes"),WorkSpace); +#else // fallback to a static allocated space Base = new unsigned char[WorkSpace]; memset(Base,0,WorkSpace); +#endif iSize = 0; } /*}}}*/ |