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+.\" Copyright (C) 1995, Thomas K. Dyas <tdyas@eden.rutgers.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+.\" manual page may be incorrect or out-of-date.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.
+.\"
+.\" Created Sat Aug 21 1995 Thomas K. Dyas <tdyas@eden.rutgers.edu>
+.\"
+.\" typo corrected, aeb, 950825
+.\" added layout change from joey, 960722
+.\" changed prototype, documented 0xffffffff, aeb, 030101
+.\"
+.TH PERSONALITY 2 2003-01-01 "Linux 2.0" "Linux Programmer's Manual"
+.SH NAME
+personality \- set the process execution domain
+.SH SYNOPSIS
+.BI "long personality(unsigned long " persona );
+.SH DESCRIPTION
+Linux supports different execution domains, or personalities, for each
+process. Among other things, execution domains tell Linux how to map
+signal numbers into signal actions. The execution domain system allows
+Linux to provide limited support for binaries compiled under other
+Unix-like operating systems.
+
+This function will return the current
+.B personality
+when
+.I persona
+equals 0xffffffff. Otherwise, it will make the execution domain
+referenced by
+.I persona
+the new execution domain of the current process.
+.SH "RETURN VALUE"
+On success, the previous
+.I persona
+is returned. On error, \-1 is returned, and
+.I errno
+is set appropriately.
+.SH ERRORS
+.TP
+.B EINVAL
+The kernel was unable to change the personality.
+.PP
+.SH FILES
+.I /usr/include/linux/personality.h
+.SH "CONFORMING TO"
+.B personality
+is Linux-specific and should not be used in programs intended to be portable.