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memmem(3) [freebsd man page]

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 /* 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 4.15 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/. GNU
2017-03-13 MEMMEM(3)

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