text: 
  #ifndef __XEROSPRIVLIB_H__
  #define __XEROSPRIVLIB_H__
  
  int getc(int);
  int putc(int, unsigned char);
  
  
  
  int _doscan(register char   *fmt,                   /* Format string for the scanf   */
              register int    **argp,                 /* Arguments to scanf            */
              int             (*getch)(int, int *),   /* Function to get a character   */
              void            (*ungetch)(int, int *), /* Function to unget a character */
              int             arg1,                   /* 1st argument to getch/ungetch */
              int             *arg2);                 /* 2nd argument to getch/ungetch */
  
  
  #endif
  
  