DAN30-A. Create a copy constructor and assignment operator for non copyable objects

FIOxx-C. Do not call remove() on an open file

This possibly needs to be broken down into more subsets. Look at the existing signal rules first so there is no overlap:
SIGxx-A. Avoid race conditions with signal handlers

POS30-C. Use the readlink() function properly

INT34-C. Use intmax_t for signed integer types or uintmax_t for unsigned integer types where the underlying type is unknown

When you copy this rule over to the C++ side:

FIO34-C. Use int to capture the return value of character IO functions

Be sure to add something about istream::get() which return int values, not char values.