32 #include <sys/types.h>
44 extern caddr_t _sbrk(
int incr ) ;
46 extern int link(
char *cOld,
char *cNew ) ;
48 extern int _close(
int file ) ;
50 extern int _fstat(
int file,
struct stat *st ) ;
52 extern int _isatty(
int file ) ;
54 extern int _lseek(
int file,
int ptr,
int dir ) ;
56 extern int _read(
int file,
char *ptr,
int len) ;
58 extern int _write(
int file,
char *ptr,
int len ) ;