LJ::check_priv — Check to see if a user has a certain privilege.
LJ::check_priv(dbarg, u, priv, arg);
dbarg. Deprecated; a master database handle ($dbh) or a master/slave set of database handles ($dbs).
u. A hashref of a row from the user table, sometimes called a "user object". Although only initially a row from the user table, gets a lot of tacked onto it from various other LJ API functions.
priv. Priv name to check for (see priv_list)
arg. Optional argument. If defined, function only returns true when $remote has a priv of type $priv also with arg $arg, not just any priv of type $priv, which is the behavior without an $arg
Usually this is used to check the privs of a $remote user. See LJ::get_remote. As such, a $u argument of undef is okay to pass: 0 will be returned, as an unknown user can't have any rights.
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boolean; true if user has privilege