memmem.3 revision 313480
Copyright (c) 2005 Pascal Gloor <pascal.gloor@spale.com>
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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$FreeBSD: stable/10/lib/libc/string/memmem.3 313480 2017-02-09 21:23:41Z ngie $
.Dd May 26, 2015 .Dt MEMMEM 3 .Os .Sh NAME .Nm memmem .Nd "locate a byte substring in a byte string" .Sh LIBRARY .Lb libc .Sh SYNOPSIS n string.h .Ft "void *" .Fo memmem .Fa "const void *big" "size_t big_len" .Fa "const void *little" "size_t little_len" .Fc .Sh DESCRIPTION The .Fn memmem function locates the first occurrence of the byte string .Fa little in the byte string .Fa big . .Sh RETURN VALUES If .Fa little_len is zero .Fa big is returned (that is, an empty little is deemed to match at the beginning of big); if .Fa little occurs nowhere in .Fa big , .Dv NULL is returned; otherwise a pointer to the first character of the first occurrence of .Fa little is returned. .Sh SEE ALSO .Xr memchr 3 , .Xr strchr 3 , .Xr strstr 3 .Sh CONFORMING TO .Fn memmem is a GNU extension. .Sh HISTORY The .Fn memmem function first appeared in .Fx 6.0 . .Sh AUTHORS .An Pascal Gloor Aq pascal.gloor@spale.com .Sh BUGS This function was broken in Linux libc up to and including version 5.0.9 and in GNU libc prior to version 2.1. Prior to .Fx 11.0 .Nm returned .Dv NULL when .Fa little_len equals 0.
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. The name of the author may not be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
$FreeBSD: stable/10/lib/libc/string/memmem.3 313480 2017-02-09 21:23:41Z ngie $
.Dd May 26, 2015 .Dt MEMMEM 3 .Os .Sh NAME .Nm memmem .Nd "locate a byte substring in a byte string" .Sh LIBRARY .Lb libc .Sh SYNOPSIS n string.h .Ft "void *" .Fo memmem .Fa "const void *big" "size_t big_len" .Fa "const void *little" "size_t little_len" .Fc .Sh DESCRIPTION The .Fn memmem function locates the first occurrence of the byte string .Fa little in the byte string .Fa big . .Sh RETURN VALUES If .Fa little_len is zero .Fa big is returned (that is, an empty little is deemed to match at the beginning of big); if .Fa little occurs nowhere in .Fa big , .Dv NULL is returned; otherwise a pointer to the first character of the first occurrence of .Fa little is returned. .Sh SEE ALSO .Xr memchr 3 , .Xr strchr 3 , .Xr strstr 3 .Sh CONFORMING TO .Fn memmem is a GNU extension. .Sh HISTORY The .Fn memmem function first appeared in .Fx 6.0 . .Sh AUTHORS .An Pascal Gloor Aq pascal.gloor@spale.com .Sh BUGS This function was broken in Linux libc up to and including version 5.0.9 and in GNU libc prior to version 2.1. Prior to .Fx 11.0 .Nm returned .Dv NULL when .Fa little_len equals 0.