#define MAX_PATH_LEN 200 /* sigh */
typedef char t_path[MAX_PATH_LEN];

typedef struct {
    t_path next;
    t_path remainder;
} t_path_next

t_path_next path_walk_into(t_path path) {
    t_path_next output;

    t_path my_next, my_remainder = "/";
    strncpy(my_next, path, MAX_PATH_LEN);

    strsep(&my_next, my_remainder);

    output.remainder = my_remainder;
    output.next = my_next;
    return output;
}

badp@delta:~/blah$ gcc path.c -Wall
path.c: In function ‘path_walk_into’:
path.c:39: warning: passing argument 1 of ‘strsep’ from incompatible pointer type
/usr/include/string.h:559: note: expected ‘char ** __restrict__’ but argument is of type ‘char (*)[200]’
path.c:41: error: incompatible types when assigning to type ‘t_path’ from type ‘char *’
path.c:42: error: incompatible types when assigning to type ‘t_path’ from type ‘char *’

t_path_next path_walk_into(t_path path) {
    t_path_next output;
    t_path my_path, delim = "/";
    char* my_path_ptr = my_path;
    strncpy(my_path, path, MAX_PATH_LEN);

    strsep(&my_path_ptr, delim); //put a  on next slash and advance pointer there.

    if (my_path_ptr == NULL) //no more slashes.
        output.remainder[0] = 0;
    else
        strncpy(output.remainder, my_path_ptr, MAX_PATH_LEN);
    strncpy(output.next, my_path, MAX_PATH_LEN);

    return output;
}