c - Reusing existing linked list API implementation -

i have in existing source base, linked list implementation(adding node, insertion, deletion , traversal) following structure:

typedef struct tagdirinfo {   char *pdirname;   struct tagdirinfo *__next;   struct tagdirinfo *__prev; }dir_header; 

lets assume char* pdirname points data part want form wrap data part , reuse existing apis , that, new linked list structure has data part as:

typedef struct printjob {   char labelname[buf_len];   int pristatus;   time_t time_stamp; }printjob; 

i think if like:

printjob newjob; /* fill in newjob structure */ dir_header *newnode; newnode->pdirname = (char*)newjob; newnode->__next = null; newnode->__prev = null; 

doing so, fill in linked list structure.

but how can access labelname data field through pdirname field of linked list structure?

do mean want :

printf("labelname : %s\n", ((printjob *)(newnode->pdirname))->labelname); 

however, code have 1 mistake! correct it:

change

newnode->pdirname = (char*)newjob;

to

newnode->pdirname = (char*)&newjob;