.\"controls the use of link(3) .TH VALID_LINK 4 .SH NAME valid_link - controls the use of link(3) .SH SYNOPSIS int valid_link(string from, string to); .SH DESCRIPTION The driver calls valid_link(from, to) in the master object from inside the link(from, to) efunction. If valid_link() returns 0, then the link() will fail. If valid_link() returns 1, then the link(3) will succeed if rename() would succeed if called with the same arguments.