1.\" $OpenBSD: memmem.3,v 1.2 2013/07/16 15:21:11 schwarze Exp $ 2.\" 3.\" Copyright (c) 2005 Pascal Gloor <pascal.gloor@spale.com> 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. The name of the author may not be used to endorse or promote 14.\" products derived from this software without specific prior written 15.\" permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.Dd $Mdocdate: July 16 2013 $ 30.Dt MEMMEM 3 31.Os 32.Sh NAME 33.Nm memmem 34.Nd locate a byte substring in a byte string 35.Sh SYNOPSIS 36.In string.h 37.Ft "void *" 38.Fo memmem 39.Fa "const void *big" "size_t big_len" 40.Fa "const void *little" "size_t little_len" 41.Fc 42.Sh DESCRIPTION 43The 44.Fn memmem 45function 46locates the first occurrence of the byte string 47.Fa little 48in the byte string 49.Fa big . 50.Sh RETURN VALUES 51If 52.Fa little 53is zero length, 54.Fa big 55is returned; if 56.Fa little 57occurs nowhere in 58.Fa big , 59.Dv NULL 60is returned; 61otherwise a pointer to the first character of the first occurrence of 62.Fa little 63is returned. 64.Sh SEE ALSO 65.Xr memchr 3 , 66.Xr strchr 3 , 67.Xr strstr 3 68.Sh STANDARDS 69.Fn memmem 70is a GNU extension. 71.Sh HISTORY 72The 73.Fn memmem 74function first appeared in 75.Ox 5.4 . 76.Sh AUTHORS 77.An Pascal Gloor Aq Mt pascal.gloor@spale.com 78