long gethostid(void);
int nice(int);
void sync(void);
-#endif
-
-#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
pid_t setpgrp(void);
char *crypt(const char *, const char *);
void encrypt(char *, int);
int acct(const char *);
long syscall(long, ...);
int execvpe(const char *, char *const [], char *const []);
+int issetugid(void);
#endif
#ifdef _GNU_SOURCE