f_reqnode
typedef struct f_reqnode f_reqnode;
f_reqnode *next;
f_reqnode *req_list;
void satisfy_req(f_reqnode *rnode, char *);
f_reqnode *rnode;
f_reqnode *rnode;
satisfy_req(f_reqnode *rnode, char *filename)
f_reqnode *r;
f_reqnode *r_tmp = r;