diff options
| author | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:55:15 -0400 |
|---|---|---|
| committer | Jacob McDonnell <jacob@jacobmcdonnell.com> | 2026-04-25 19:55:15 -0400 |
| commit | 253e67c8b3a72b3a4757fdbc5845297628db0a4a (patch) | |
| tree | adf53b66087aa30dfbf8bf391a1dadb044c3bf4d /static/netbsd/man3/memset.3 | |
| parent | a9157ce950dfe2fc30795d43b9d79b9d1bffc48b (diff) | |
docs: Added All NetBSD Manuals
Diffstat (limited to 'static/netbsd/man3/memset.3')
| -rw-r--r-- | static/netbsd/man3/memset.3 | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/static/netbsd/man3/memset.3 b/static/netbsd/man3/memset.3 new file mode 100644 index 00000000..949979c7 --- /dev/null +++ b/static/netbsd/man3/memset.3 @@ -0,0 +1,80 @@ +.\" Copyright (c) 1990, 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" Chris Torek and the American National Standards Committee X3, +.\" on Information Processing Systems. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" from: @(#)memset.3 8.1 (Berkeley) 6/4/93 +.\" $NetBSD: memset.3,v 1.13 2016/08/04 16:36:45 sevan Exp $ +.\" +.Dd June 23, 2013 +.Dt MEMSET 3 +.Os +.Sh NAME +.Nm memset +.Nd write a byte to byte string +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In string.h +.Ft void * +.Fn memset "void *b" "int c" "size_t len" +.Sh DESCRIPTION +The +.Fn memset +function +writes +.Fa len +bytes of value +.Fa c +(converted to an unsigned char) to the string +.Fa b . +.Sh RETURN VALUES +The +.Fn memset +function +returns the original value of +.Fa b . +.Pp +Note that the compiler may optimize away a call to +.Fn memset +if it can prove that the string will not be used by the program again, +for example if it is allocated on the stack and about to go out of scope. +If you want to guarantee that zeros are written to memory, for example +to sanitize a buffer holding a cryptographic secret, use +.Xr explicit_memset 3 . +.Sh SEE ALSO +.Xr bzero 3 , +.Xr explicit_memset 3 , +.Xr swab 3 +.Sh STANDARDS +The +.Fn memset +function +conforms to +.St -ansiC . |
