The memmove() function copies n bytes from memory
area src to memory area dest. The memory areas may overlap:
copying takes place as though the bytes in src are first copied into
a temporary array that does not overlap src or dest, and the
bytes are then copied from the temporary array to dest.
RETURN VALUE
The memmove() function returns a pointer to
dest.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).