man7.org > Linux > man-pages

Linux/UNIX system programming training

memeq(3) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON 

memeq(3)                 Library Functions Manual                memeq(3)

NAME         top

       memeq - memory equal

LIBRARY         top

       gnulib - The GNU Portability Library

SYNOPSIS         top

       #include <string.h>

       bool memeq(const void *m1, const void *m2, size_t n);

DESCRIPTION         top

       memeq() determines whether the first n bytes of the memory areas
       pointed to by m1 and m2 are equal.

RETURN VALUE         top

       memeq() returns true if and only if the first n bytes of the
       memory areas pointed to by m1 and m2 are equal.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                            │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │ memeq()                              │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS         top

       GNU.

HISTORY         top

       gnulib 202601.

SEE ALSO         top

       streq(3), memcmp(3), string(3)

COLOPHON         top

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.16.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2026-01-16.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.16            2025-09-20                       memeq(3)

Pages that refer to this page: streq(3)

HTML rendering created 2026-01-16 by Michael Kerrisk, author of The Linux Programming Interface.

For details of in-depth Linux/UNIX system programming training courses that I teach, look here.

Hosting by jambit GmbH.

Cover of TLPI