Copyright (c) 1983 Regents of the University of California.
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@(#)setuid.2 6.3 (Berkeley) 05/12/86

C 5 setuid, seteuid, setruid, setgid, setegid, setrgid - set user and group ID

#include <sys/types.h>

setuid(uid)
seteuid(euid)
setruid(ruid)
uid_t uid, euid, ruid;

setgid(gid)
setegid(egid)
setrgid(rgid)
gid_t gid, egid, rgid;

 DESCRIPTION
 Setuid  ( setgid ) sets both the real and effective
user ID (group ID) of the current process to
as specified.

 Seteuid  ( setegid ) sets the effective user ID (group ID) of the
current process.

 Setruid  ( setrgid ) sets the real user ID (group ID) of the
current process.

These calls are only permitted to the super-user
or if the argument is the real or effective ID.
 "SEE ALSO"
setreuid(2), setregid(2), getuid(2), getgid(2)
 DIAGNOSTICS
Zero is returned if the user (group) ID is set;
-1 is returned otherwise.