void setusershell(void);
void endusershell(void);
char *getusershell(void);
+int acct(const char *);
#endif
#ifdef _GNU_SOURCE
int getresgid(gid_t *, gid_t *, gid_t *);
char *get_current_dir_name(void);
int pipe2(int [2], int);
+int dup3(int, int, int);
#endif
#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)