'\" te
.\" Copyright (c) 1996, Sun Microsystems, Inc. All Rights Reserved.
.\" Copyright 1989 AT&T
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH GETUID 2 "Dec 28, 1996"
.SH NAME
getuid, geteuid, getgid, getegid \- get real user, effective user, real group,
and effective group IDs
.SH SYNOPSIS
.LP
.nf
#include <sys/types.h>
#include <unistd.h>

\fBuid_t\fR \fBgetuid\fR(\fBvoid\fR);
.fi

.LP
.nf
\fBuid_t\fR \fBgeteuid\fR(\fBvoid\fR);
.fi

.LP
.nf
\fBgid_t\fR \fBgetgid\fR(\fBvoid\fR);
.fi

.LP
.nf
\fBgid_t\fR \fBgetegid\fR(\fBvoid\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBgetuid()\fR function returns the real user \fBID\fR of the calling
process. The real user \fBID\fR identifies the person who is logged in.
.sp
.LP
The \fBgeteuid()\fR function returns the effective user \fBID\fR of the calling
process. The effective user \fBID\fR gives the process various permissions
during execution of "set-user-ID" mode processes which use  \fBgetuid()\fR to
determine the real user \fBID\fR of the process that invoked them.
.sp
.LP
The \fBgetgid()\fR function returns the real group \fBID\fR of the calling
process.
.sp
.LP
The \fBgetegid()\fR function returns the effective group \fBID\fR of the
calling process.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
_
MT-Level	Async-Signal-Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR Intro (2),
.BR setuid (2),
.BR attributes (7),
.BR standards (7)