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SETUID(2)                     System Calls Manual                    SETUID(2)

NAME
       setuid, seteuid, setgid, setegid - set (effective) user or group ID's

SYNOPSIS
       #include <sys/types.h>

       int setuid(uid_t uid)
       int seteuid(uid_t euid)
       int setgid(gid_t gid)
       int setegid(gid_t egid)

DESCRIPTION
       Setuid  sets the real and effective user ID's of the current process to
       uid.  Unprivileged users may only change both user  ID's  to  the  real
       user  ID;  only the super-user may make other changes.  Setgid does the
       same for the real and effective group ID's.

       Minix-vmd allows an unprivileged user to change ID's  to  the  original
       real or effective ID as they were at the time the process was executed.
       Setgid may also set the group ID's to any of the additional group ID's.
       If  one of the remembered user ID's was 0 then any user or group ID may
       be chosen.

RETURN VALUE
       Upon successful completion, a value of 0  is  returned.   Otherwise,  a
       value of -1 is returned and errno is set to indicate the error.

ERRORS
       [EPERM]        The  current  process is not the super-user and a change
                      other than one of the allowed changes was attempted.

SEE ALSO
       getuid(2), geteuid(2), getgid(2).  getegid(2).

4th Berkeley Distribution         May 9, 1985                        SETUID(2)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO