unsigned getegid (void);
unsigned getgid (void);
int setuid (unsigned uid);
int setregid (unsigned rgid, unsigned gid);
char * getpass (const char * prompt);
int fchown (int fd, unsigned uid, unsigned gid);
unsigned getegid (void);
unsigned getgid (void);
int setuid (unsigned uid);
int setregid (unsigned rgid, unsigned gid);
char * getpass (const char * prompt);
int fchown (int fd, unsigned uid, unsigned gid);