&h2(RETURN VALUE)
On success, the actual number of bytes copied is returned, or -1 to indicate a hard error.
If the length is less than 0, or not the same as length passed in, &cw(errno) is set
&h2(RETURN VALUE)
On success, the actual number of bytes copied is returned, or -1 to indicate a hard error.
If the length is less than 0, or not the same as length passed in, &cw(errno) is set