STRCASECMP(3P)                                      POSIX Programmer's Manual                                     STRCASECMP(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
       strcasecmp, strncasecmp - case-insensitive string comparisons

SYNOPSIS
       #include <strings.h>

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


DESCRIPTION
       The  strcasecmp()  function  shall compare, while ignoring differences in case, the string pointed to by s1 to the string
       pointed to by s2. The strncasecmp() function shall compare, while ignoring differences in case, not  more  than  n  bytes
       from the string pointed to by s1 to the string pointed to by s2.

       In  the  POSIX  locale, strcasecmp() and strncasecmp() shall behave as if the strings had been converted to lowercase and
       then a byte comparison performed. The results are unspecified in other locales.

RETURN VALUE
       Upon completion, strcasecmp() shall return an integer greater than, equal to, or less than 0, if the string pointed to by
       s1 is, ignoring case, greater than, equal to, or less than the string pointed to by s2, respectively.

       Upon successful completion, strncasecmp() shall return an integer greater than, equal to, or less than 0, if the possibly
       null-terminated array pointed to by s1 is, ignoring case, greater than, equal to, or less than the  possibly  null-termi-
       nated 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
       The Base Definitions volume of IEEE Std 1003.1-2001, <strings.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                                                STRCASECMP(3P)