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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 (consult 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 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  strncmp() function shall compare not more than n bytes (bytes that
       follow a NUL character 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	inter‐
       preted  as  type	 unsigned  char) that differ in the strings being com‐
       pared.

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 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			   STRNCMP(3P)
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