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	1	.\" Copyright (c) 1990, 1991, 1993
	2	.\" The Regents of the University of California. All rights reserved.
	3	.\"
	4	.\" This code is derived from software contributed to Berkeley by
	5	.\" Chris Torek and the American National Standards Committee X3,
	6	.\" on Information Processing Systems.
	7	.\"
	8	.\" Redistribution and use in source and binary forms, with or without
	9	.\" modification, are permitted provided that the following conditions
	10	.\" are met:
	11	.\" 1. Redistributions of source code must retain the above copyright
	12	.\" notice, this list of conditions and the following disclaimer.
	13	.\" 2. Redistributions in binary form must reproduce the above copyright
	14	.\" notice, this list of conditions and the following disclaimer in the
	15	.\" documentation and/or other materials provided with the distribution.
	16	.\" 4. Neither the name of the University nor the names of its contributors
	17	.\" may be used to endorse or promote products derived from this software
	18	.\" without specific prior written permission.
	19	.\"
	20	.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	21	.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	24	.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	.\" SUCH DAMAGE.
	31	.\"
	32	.\" @(#)memcpy.3 8.1 (Berkeley) 6/4/93
	33	.\" $FreeBSD: src/lib/libc/string/memcpy.3,v 1.9 2009/04/07 13:42:53 trasz Exp $
	34	.\"
	35	.Dd June 4, 1993
	36	.Dt MEMCPY 3
	37	.Os
	38	.Sh NAME
	39	.Nm memcpy
	40	.Nd copy memory area
	41	.Sh LIBRARY
	42	.Lb libc
	43	.Sh SYNOPSIS
	44	.In string.h
	45	.Ft void *
	46	.Fo memcpy
	47	.Fa "void *restrict s1"
	48	.Fa "const void *restrict s2"
	49	.Fa "size_t n"
	50	.Fc
	51	.Sh DESCRIPTION
	52	The
	53	.Fn memcpy
	54	function
	55	copies
	56	.Fa n
	57	bytes from memory area
	58	.Fa s2
	59	to memory area
	60	.Fa s1 .
	61	If
	62	.Fa s1
	63	and
	64	.Fa s2
	65	overlap, behavior is undefined.
	66	Applications in which
	67	.Fa s1
	68	and
	69	.Fa s2
	70	might overlap should use
	71	.Xr memmove 3
	72	instead.
	73	.Sh RETURN VALUES
	74	The
	75	.Fn memcpy
	76	function
	77	returns the original value of
	78	.Fa s1 .
	79	.Sh SEE ALSO
	80	.Xr bcopy 3 ,
	81	.Xr memccpy 3 ,
	82	.Xr memmove 3 ,
	83	.Xr strcpy 3 ,
	84	.Xr wmemcpy 3
	85	.Sh STANDARDS
	86	The
	87	.Fn memcpy
	88	function
	89	conforms to
	90	.St -isoC .