.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
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.\" manual provided the copyright notice and this permission notice are
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.\" manual under the conditions for verbatim copying, provided that the
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.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein.  The author(s) may not
.\" have taken the same level of care in the production of this manual,
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.\" References consulted:
.\"     Linux libc source code
.\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\"     386BSD man pages
.\" Modified Sat Jul 24 18:55:27 1993 by Rik Faith (faith@cs.unc.edu)
.TH MEMCMP 3  2011-09-14 "" "Linux Programmer's Manual"
.SH NAME
memcmp \- compare memory areas
.SH SYNOPSIS
.nf
.B #include <string.h>
.sp
.BI "int memcmp(const void *" s1 ", const void *" s2 ", size_t " n );
.fi
.SH DESCRIPTION
The
.BR memcmp ()
function compares the first \fIn\fP bytes (each interpreted as
.IR "unsigned char" )
of the memory areas \fIs1\fP and \fIs2\fP.
It returns an integer less than,
equal to, or greater than zero if \fIs1\fP is found, respectively, to
be less than, to match, or be greater than \fIs2\fP.
.SH "RETURN VALUE"
The
.BR memcmp ()
function returns an integer less than, equal to, or
greater than zero if the first \fIn\fP bytes of \fIs1\fP is found,
respectively, to be less than, to match, or be greater than the first
\fIn\fP bytes of \fIs2\fP.
.SH "CONFORMING TO"
SVr4, 4.3BSD, C89, C99, POSIX.1-2001.
.SH "SEE ALSO"
.BR bcmp (3),
.BR strcasecmp (3),
.BR strcmp (3),
.BR strcoll (3),
.BR strncasecmp (3),
.BR strncmp (3),
.BR wmemcmp (3)
.SH COLOPHON
This page is part of release 3.44 of the Linux
.I man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.