# I bet you never knew there were this many of these!
gid_t getegid(void);
gid_t getgid(void);
int getgrgid_r(gid_t gid, struct group *gbuf, char *buf, size_t buflen, struct group **gbufp);
int getgrnam_r(const char *name, struct group *gbuf, char *buf, size_t buflen, struct group **gbufp);
int getpwnam_r(const char *name, struct passwd *pwbuf, char *buf, size_t buflen, struct passwd **pwbufp);
int getpwuid_r(uid_t uid, struct passwd *pwbuf, char *buf, size_t buflen, struct passwd **pwbufp);
int setegid(gid_t egid);
int seteuid(uid_t euid);
int setgid(gid_t gid);
int setregid(gid_t rgid, gid_t egid);
int setreuid(uid_t ruid, uid_t euid);
int setuid(uid_t uid);
struct group *getgrent(void);
struct group *getgrgid(gid_t gid);
struct group *getgrnam(const char *name);
struct passwd *getpwent(void);
struct passwd *getpwnam(const char *name);
struct passwd *getpwuid(uid_t uid);
uid_t geteuid(void);
uid_t getuid(void);
void endgrent(void);
void endpwent(void);
void setgrent(void);
void setpwent(void);