memmem
Section: C Library Functions (3)
Updated: 2022-12-15
Index
Return to Main Contents
NAME
memmem - locate a substring
LIBRARY
Standard C library
(libc, -lc)
SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <string.h>
void *memmem(const void haystack[.haystacklen], size_t haystacklen,
const void needle[.needlelen], 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
|
STANDARDS
This function is not specified in POSIX.1,
but is present on a number of other systems,
including:
musl libc 0.9.7;
FreeBSD 6.0, OpenBSD 5.4, NetBSD, and Illumos.
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)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- BUGS
-
- SEE ALSO
-
This document was created by
man2html,
using the manual pages.
Time: 10:59:34 GMT, April 23, 2024