c_link
TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */
TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
TAILQ_REMOVE(&tq, &fdcon[s], c_link);
c = TAILQ_NEXT(c, c_link);
ret = c_link(file1, skip1, file2, skip2, limit);
int c_link(const char *, off_t, const char *, off_t, off_t);