they will be in the next version of POSIX
#include <bits/alltypes.h>
int pipe(int [2]);
#include <bits/alltypes.h>
int pipe(int [2]);
+int pipe2(int [2], int);
int close(int);
int dup(int);
int dup2(int, int);
int close(int);
int dup(int);
int dup2(int, int);
+int dup3(int, int, int);
off_t lseek(int, off_t, int);
int fsync(int);
int fdatasync(int);
off_t lseek(int, off_t, int);
int fsync(int);
int fdatasync(int);
int getresuid(uid_t *, uid_t *, uid_t *);
int getresgid(gid_t *, gid_t *, gid_t *);
char *get_current_dir_name(void);
int getresuid(uid_t *, uid_t *, uid_t *);
int getresgid(gid_t *, gid_t *, gid_t *);
char *get_current_dir_name(void);
-int pipe2(int [2], int);
-int dup3(int, int, int);