* Coverity #def53: COPY_PASTE_ERROR

* Coverity #def18: DC.STREAM_BUFFER. Double-check max length of dev

* Coverity #def44: MISSING_BREAK. This looks like it should be here

* Coverity #def67: STRING_NULL: potential OOB read if 0 bytes read.

* Coverity #def66: FORWARD_NULL: potential null ptr deref

* Coverity #def17: RESOURCE_LEAK: missing free()

* Dont free the result of dirname

dirname() may return pointers to statically allocated memory. Don't
free the pointer it returns.