STRNCMP(3P)                                         POSIX Programmer's Manual                                        STRNCMP(3P)



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (con-
       sult the corresponding Linux manual page for details of Linux behavior), or the  interface  may  not  be  implemented  on
       Linux.

NAME
       strncmp - compare part of two strings

SYNOPSIS
       #include <string.h>

       int strncmp(const char *s1, const char *s2, size_t n);


DESCRIPTION
       The  strncmp()  function  shall  compare  not more than n bytes (bytes that follow a null byte are not compared) from the
       array pointed to by s1 to the array pointed to by s2.

       The sign of a non-zero return value is 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 strings being compared.

RETURN VALUE
       Upon  successful  completion,  strncmp()  shall return an integer greater than, equal to, or less than 0, if the possibly
       null-terminated array pointed to by s1 is greater than, equal to, or less than the possibly null-terminated array 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
       strcmp(), the Base Definitions volume of IEEE Std 1003.1-2001, <string.h>

COPYRIGHT
       Portions  of  this  text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for
       Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6,  Copy-
       right (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. 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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                   STRNCMP(3P)