MEMMEM(3) BSD Library Functions Manual MEMMEM(3)NAME
memmem -- locate a byte substring in a byte string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <string.h>
void *
memmem(const void *big, size_t big_len, const void *little, size_t little_len);
DESCRIPTION
The memmem() function locates the first occurrence of the byte string little in the byte string big.
RETURN VALUES
If big_len is smaller than little_len, if little_len is 0, if big_len is 0 or if little occurs nowhere in big, NULL is returned; otherwise a
pointer to the first character of the first occurrence of little is returned.
SEE ALSO memchr(3), strchr(3), strstr(3)CONFORMING TO
memmem() is a GNU extension.
HISTORY
The memmem() function first appeared in FreeBSD 6.0.
AUTHORS
Pascal Gloor <pascal.gloor@spale.com>
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.
BSD August 24, 2005 BSD
Check Out this Related Man Page
MEMMEM(3) Linux Programmer's Manual MEMMEM(3)NAME
memmem - locate a substring
SYNOPSIS
#define _GNU_SOURCE
#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.
CONFORMING TO
This function is a GNU extension.
BUGS
This function was broken in Linux libraries up to and including libc 5.0.9; there the needle and haystack arguments were interchanged, and
a pointer to the end of the first occurrence of needle was returned.
Both old and new libc's have the bug that if needle is empty, haystack-1 (instead of haystack) is returned. And glibc 2.0 makes it worse,
returning a pointer to the last byte of haystack. This is fixed in glibc 2.1.
SEE ALSO strstr(3), feature_test_macros(7)COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2008-12-05 MEMMEM(3)
Manufacturer Links
General Information
Home Page: IBM United States
Documentation/Information: IBM System p - UNIX servers: Support and services
pSeries and AIX Information Center
Developerworks AIX Wiki: AIX Wiki
AIX for System Administrators
In-depth information from IBM:
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