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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "GETUID" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" getuid 
+.SH NAME
+getuid \- get a real user ID
+.SH SYNOPSIS
+.LP
+\fB#include <unistd.h>
+.br
+.sp
+uid_t getuid(void);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIgetuid\fP() function shall return the real user ID of the calling
+process.
+.SH RETURN VALUE
+.LP
+The \fIgetuid\fP() function shall always be successful and no return
+value is reserved to indicate the error.
+.SH ERRORS
+.LP
+No errors are defined.
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.SS Setting the Effective User ID to the Real User ID
+.LP
+The following example sets the effective user ID and the real user
+ID of the current process to the real user ID of the
+caller.
+.sp
+.RS
+.nf
+
+\fB#include <unistd.h>
+#include <sys/types.h>
+\&...
+setreuid(getuid(), getuid());
+\&...
+\fP
+.fi
+.RE
+.SH APPLICATION USAGE
+.LP
+None.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIgetegid\fP() , \fIgeteuid\fP() , \fIgetgid\fP() , \fIsetegid\fP()
+, \fIseteuid\fP() , \fIsetgid\fP() , \fIsetregid\fP() , \fIsetreuid\fP()
+, \fIsetuid\fP() , the Base Definitions volume of
+IEEE\ Std\ 1003.1-2001, \fI<sys/types.h>\fP, \fI<unistd.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .