I have a function:

func (struct passwd* pw)
{

struct passwd* temp;
struct passwd* save;

temp = getpwnam("someuser");
/* since getpwnam returns a pointer to a static 
 * data buffer, I am copying the returned struct
 * to a local struct.
 */

if(temp) {
   save = malloc(sizeof *save);
   if (save) {
       memcpy(save, temp, sizeof(struct passwd));
       /* Here, I have to update passed pw* with this save struct. */
       *pw = *save; /* (~ memcpy) */
   }
}

}

The function which calls func(pw) is able to get the updated information.

But is it fine to use it as above. The statement *pw = *save is not a deep copy. I do not want to copy each and every member of structure one by one like pw->pw_shell = strdup(save->pw_shell) etc.

Is there any better way to do it?

Thanks.