long gethostid(void);
int nice(int);
void sync(void);
-int getdtablesize(void);
#endif
#ifdef _GNU_SOURCE
int setgroups(size_t, const gid_t []);
int setresuid(uid_t, uid_t, uid_t);
int setresgid(gid_t, gid_t, gid_t);
+int getresuid(uid_t *, uid_t *, uid_t *);
+int getresgid(gid_t *, gid_t *, gid_t *);
char *get_current_dir_name(void);
int daemon(int, int);
int getdomainname(char *, size_t);
+int getdtablesize(void);
+void setusershell(void);
+void endusershell(void);
+char *getusershell(void);
#endif
#define _XOPEN_VERSION 700