#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <string.h>
void
*memmem(
const void *haystack,
size_t haystacklen,
const void *needle,
size_t needlelen);
DESCRIPTION
The memmem() function finds
the start of the first occurrence of the substring needle of length needlelen in the memory area
haystack of length
haystacklen.
RETURN VALUE
The memmem() function
returns a pointer to the beginning of the substring, or NULL
if the substring is not found.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
Interface
Attribute
Value
memmem()
Thread safety
MT-Safe
CONFORMING TO
This function is not specified in POSIX.1, but is present
on a number of other systems.
BUGS
In glibc 2.0, if needle is empty, memmem() returns a pointer to the last byte
of haystack. This is
fixed in glibc 2.1.
This page is part of release 5.11 of the Linux man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
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References consulted:
Linux libc source code
386BSD man pages
Modified Sat Jul 24 18:50:48 1993 by Rik Faith (faith@cs.unc.edu)
Interchanged 'needle' and 'haystack'; added history, aeb, 980113.