126 pn_push(path_node_t **pnp, char *path)  in pn_push()  argument
137 	pn->pn_next = *pnp;  in pn_push()
138 	return (*pnp = pn);  in pn_push()
142 pn_free(path_node_t **pnp)  in pn_free()  argument
146 	while (*pnp != NULL) {  in pn_free()
147 		pn = *pnp;  in pn_free()
148 		*pnp = pn->pn_next;  in pn_free()
162 pn_pop(path_node_t **pnp, char *path)  in pn_pop()  argument
166 	if (*pnp == NULL)  in pn_pop()
169 	pn = *pnp;  in pn_pop()
170 	*pnp = pn->pn_next;  in pn_pop()