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MEMCMP(3P)                 POSIX Programmer's Manual                MEMCMP(3P)
PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the  corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.
NAME
       memcmp -- compare bytes in memory
SYNOPSIS
       #include <string.h>
       int memcmp(const void *s1, const void *s2, size_t n);
DESCRIPTION
       The functionality described on this reference page is aligned with  the
       ISO C  standard.  Any  conflict between the requirements described here
       and the ISO C standard is unintentional. This  volume  of  POSIX.1-2008
       defers to the ISO C standard.
       The memcmp() function shall compare the first n bytes (each interpreted
       as unsigned char) of the object pointed to by s1 to the first  n  bytes
       of the object pointed to by s2.
       The  sign of a non-zero return value shall be determined by the sign of
       the difference between the values of the  first  pair  of  bytes  (both
       interpreted  as  type  unsigned  char) that differ in the objects being
       compared.
RETURN VALUE
       The memcmp() function shall return an integer greater than,  equal  to,
       or  less  than 0, if the object pointed to by s1 is greater than, equal
       to, or less than the object pointed to by s2, respectively.
ERRORS
       No errors are defined.
       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       None.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       The Base Definitions volume of POSIX.1-2008, <string.h>
COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
       cal and Electronics Engineers,  Inc  and  The  Open  Group.   (This  is
       POSIX.1-2008  with  the  2013  Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and
       The  Open Group Standard, the original IEEE and The Open Group Standard
       is the referee document. The original Standard can be  obtained  online
       at http://www.unix.org/online.html .
       Any  typographical  or  formatting  errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files  to  man page format. To report such errors, see https://www.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                           MEMCMP(3P)