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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.
6.\"
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7.\" Redistribution and use in source and binary forms, with or without
8.\" modification, are permitted provided that the following conditions
9.\" are met:
10.\" 1. Redistributions of source code must retain the above copyright
11.\" notice, this list of conditions and the following disclaimer.
12.\" 2. Redistributions in binary form must reproduce the above copyright
13.\" notice, this list of conditions and the following disclaimer in the
14.\" documentation and/or other materials provided with the distribution.
15.\" 3. All advertising materials mentioning features or use of this software
16.\" must display the following acknowledgement:
17.\" This product includes software developed by the University of
18.\" California, Berkeley and its contributors.
19.\" 4. Neither the name of the University nor the names of its contributors
20.\" may be used to endorse or promote products derived from this software
21.\" without specific prior written permission.
22.\"
23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33.\" SUCH DAMAGE.
34.\"
5b2abdfb 35.\" @(#)bzero.3 8.1 (Berkeley) 6/4/93
9385eb3d 36.\" $FreeBSD: src/lib/libc/string/bzero.3,v 1.8 2002/09/01 21:53:46 robert Exp $
e9ce8d39 37.\"
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38.Dd June 4, 1993
39.Dt BZERO 3
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40.Os
41.Sh NAME
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42.Nm bzero
43.Nd write zeroes to a byte string
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44.Sh LIBRARY
45.Lb libc
46.Sh SYNOPSIS
9385eb3d 47.In strings.h
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48.Ft void
49.Fn bzero "void *b" "size_t len"
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50.Sh DESCRIPTION
51The
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52.Fn bzero
53function
54writes
e9ce8d39 55.Fa len
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56zero bytes to the string
57.Fa b .
58If
e9ce8d39 59.Fa len
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60is zero,
61.Fn bzero
62does nothing.
e9ce8d39 63.Sh SEE ALSO
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64.Xr memset 3 ,
65.Xr swab 3
e9ce8d39 66.Sh HISTORY
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67A
68.Fn bzero
69function
70appeared in
71.Bx 4.3 .
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72Its prototype existed previously in
73.Aq Pa string.h
74before it was moved to
75.Aq Pa strings.h
76for
77.St -p1003.1-2001
78compliance.