private static unsafe Win32Native.SECURITY_ATTRIBUTES GetSecAttrs(FileShare share, FileSecurity fileSecurity, out object pinningHandle)
{
pinningHandle = null;
Win32Native.SECURITY_ATTRIBUTES structure = null;
if (((share & FileShare.Inheritable) != FileShare.None) || (fileSecurity != null))
{
structure = new Win32Native.SECURITY_ATTRIBUTES {
nLength = Marshal.SizeOf(structure)
};
if ((share & FileShare.Inheritable) != FileShare.None)
{
structure.bInheritHandle = 1;
}
if (fileSecurity == null)
{
return structure;
}
byte[] securityDescriptorBinaryForm = fileSecurity.GetSecurityDescriptorBinaryForm();
pinningHandle = GCHandle.Alloc(securityDescriptorBinaryForm, GCHandleType.Pinned);
fixed (byte* numRef = securityDescriptorBinaryForm)
{
structure.pSecurityDescriptor = numRef;
}
}
return structure;
}
// If pinningHandle is not null, caller must free it AFTER the call to
// CreateFile has returned.
//
// [....]: Copied this from System.IO.FileStream
//
private static unsafe SECURITY_ATTRIBUTES GetSecAttrs(
FileShare share,
FileSecurity fileSecurity,
out object pinningHandle)
{
pinningHandle = null;
SECURITY_ATTRIBUTES secAttrs = null;
if ((share & FileShare.Inheritable) != 0 || fileSecurity != null)
{
secAttrs = new SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
if ((share & FileShare.Inheritable) != 0)
{
secAttrs.bInheritHandle = 1;
}
// For ACLs, get the security descriptor from the FileSecurity.
if (fileSecurity != null)
{
byte[] sd = fileSecurity.GetSecurityDescriptorBinaryForm();
pinningHandle = GCHandle.Alloc(sd, GCHandleType.Pinned);
fixed (byte* pSecDescriptor = sd)
secAttrs.pSecurityDescriptor = pSecDescriptor;
}
}
return secAttrs;
}
