internal static IntPtr FdiOpen(string filename, int oflag, int pmode)
{
FileMode mode = CabinetNativeApi.ConvertOpflagToFileMode(oflag);
FileAccess access = CabinetNativeApi.ConvertPermissionModeToFileAccess(pmode);
FileShare share = CabinetNativeApi.ConvertPermissionModeToFileShare(pmode);
// This method is used for opening the cab file as well as saving the extracted files.
// When we are opening the cab file we only need read permissions.
// We force read permissions so that non-elevated users can extract cab files.
if (mode == FileMode.Open || mode == FileMode.OpenOrCreate)
{
access = FileAccess.Read;
share = FileShare.Read;
}
try
{
FileStream stream = new FileStream(filename, mode, access, share);
if (stream is null)
{
return(new IntPtr(-1));
}
return(GCHandle.ToIntPtr(GCHandle.Alloc(stream)));
}
catch (IOException)
{
return(new IntPtr(-1));
}
}
internal static IntPtr FdiOpen(string filename, int oflag, int pmode)
{
FileMode mode = CabinetNativeApi.ConvertOpflagToFileMode(oflag);
FileAccess access = CabinetNativeApi.ConvertPermissionModeToFileAccess(pmode);
FileShare share = CabinetNativeApi.ConvertPermissionModeToFileShare(pmode);
try
{
FileStream stream = new FileStream(filename, mode, access, share);
if (null == stream)
{
return(new IntPtr(-1));
}
return(GCHandle.ToIntPtr(GCHandle.Alloc(stream)));
}
catch (IOException)
{
return(new IntPtr(-1));
}
}
