MEMMEM
Section: Linux Programmer's Manual (3)
Updated: 2017-03-13
Page Index
NAME
memmem - locate a substring
SYNOPSIS
#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.
SEE ALSO
bstring(3),
strstr(3)
COLOPHON
This page is part of release 5.10 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/.