Function overloading in C

Question

Today, looking at the man page for open(), I\'ve noticed this function is \'overloaded\':

   int open(const char *pathname, int flags);
   int o         


        

Answer 1

"mode must be specified when O_CREAT is in the flags, and is ignored otherwise."

extern int open (__const char *__file, int __oflag, ...)

It uses varargs and only loads the mode variable argument if __oflag contains O_CREAT.