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+.\" Hey Emacs! This file is -*- nroff -*- source.
+.\"
+.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
+.\"
+.\" Permission is granted to make and distribute verbatim copies of this
+.\" manual provided the copyright notice and this permission notice are
+.\" preserved on all copies.
+.\"
+.\" Permission is granted to copy and distribute modified versions of this
+.\" manual under the conditions for verbatim copying, provided that the
+.\" entire resulting derived work is distributed under the terms of a
+.\" permission notice identical to this one.
+.\" 
+.\" Since the Linux kernel and libraries are constantly changing, this
+.\" manual page may be incorrect or out-of-date.  The author(s) assume no
+.\" responsibility for errors or omissions, or for damages resulting from
+.\" the use of the information contained herein.  The author(s) may not
+.\" have taken the same level of care in the production of this manual,
+.\" which is licensed free of charge, as they might when working
+.\" professionally.
+.\" 
+.\" Formatted or processed versions of this manual, if unaccompanied by
+.\" the source, must acknowledge the copyright and authors of this work.
+.\"
+.\" Historical remark, aeb, 2004-06-05
+.TH GETUID 2 1993-07-23 "Linux 0.99.11" "Linux Programmer's Manual"
+.SH NAME
+getuid, geteuid \- get user identity
+.SH SYNOPSIS
+.B #include <unistd.h>
+.br
+.B #include <sys/types.h>
+.sp
+.B uid_t getuid(void);
+.br
+.B uid_t geteuid(void);
+.SH DESCRIPTION
+.B getuid
+returns the real user ID of the current process.
+
+.B geteuid
+returns the effective user ID of the current process.
+
+The real ID corresponds to the ID of the calling process.  The effective ID
+corresponds to the set ID bit on the file being executed.
+.SH ERRORS
+These functions are always successful.
+.SH "CONFORMING TO"
+POSIX, BSD 4.3.
+.SH HISTORY
+In Unix V6 the \fBgetuid()\fP call returned (euid << 8) + uid.
+Unix V7 introduced separate calls \fBgetuid()\fP and \fBgeteuid()\fP.
+.SH "SEE ALSO"
+.BR setreuid (2),
+.BR setuid (2)