Man Linux: Main Page and Category List

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-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

       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,  Copyright  (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.opengroup.org/unix/online.html .