.TH SETUID 2 
.UC
.SH NAME
setuid, setgid \- set user or group ID
.SH SYNOPSIS
.B setuid(uid)
.br
.B setgid(gid)
.SH DESCRIPTION
The real and effective user ID (group ID) of the current process are set to
the argument.
These calls are only permitted to the super-user
or if the argument is the real or effective ID.
.SH ERRORS
.I Setuid
will fail and the user IDs will be unchanged if:
.TP 20
[EPERM]
The current process's effective user ID is not the super-user
and a change other than changing the user IDs to the
real or effective user ID was specified.
.PP
.I Setgid
will fail and the group IDs will be unchanged if:
.TP 20
[EPERM]
The current process's effective user ID is not the super-user
and a change other than changing the group IDs to the
real or effective group ID was specified.
.SH "SEE ALSO"
getuid(2)
.SH ASSEMBLER
(setuid = 23.)
.br
(user ID in r0)
.br
.B sys setuid
.PP
(setgid = 46.)
.br
(group ID in r0)
.br
.B sys  setgid