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5b2abdfb 1.\" Copyright (c) 1990, 1991, 1993
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2.\" The Regents of the University of California. All rights reserved.
3.\"
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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.\"
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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.
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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.\"
5b2abdfb 32.\" @(#)memset.3 8.1 (Berkeley) 6/4/93
1f2f436a 33.\" $FreeBSD: src/lib/libc/string/memset.3,v 1.9 2009/04/07 13:42:53 trasz Exp $
e9ce8d39 34.\"
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35.Dd June 4, 1993
36.Dt MEMSET 3
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37.Os
38.Sh NAME
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39.Nm memset
40.Nd write a byte to byte string
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41.Sh LIBRARY
42.Lb libc
43.Sh SYNOPSIS
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44.In string.h
45.Ft void *
46.Fn memset "void *b" "int c" "size_t len"
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47.Sh DESCRIPTION
48The
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49.Fn memset
50function
51writes
e9ce8d39 52.Fa len
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53bytes of value
54.Fa c
55(converted to an unsigned char) to the string
56.Fa b .
e9ce8d39 57.Sh RETURN VALUES
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58The
59.Fn memset
60function returns its first argument.
e9ce8d39 61.Sh SEE ALSO
5b2abdfb 62.Xr bzero 3 ,
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63.Xr swab 3 ,
64.Xr wmemset 3
5b2abdfb 65.Sh STANDARDS
e9ce8d39 66The
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67.Fn memset
68function
69conforms to
70.St -isoC .