MEMMEM(3) - man page online | library functions

Locate a substring.

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 a GNU extension.
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 strstr(3)
COLOPHON This page is part of release 4.04 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
GNU 2015-03-02 MEMMEM(3)
This manual Reference Other manuals
memmem(3) referred by memchr(3) | memrmem(3pub) | strnstr(3) | strstr(3)
refer to attributes(7) | feature_test_macros(7) | strstr(3)