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

PROLOG         top

       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         top

       _tolower — transliterate uppercase characters to lowercase

SYNOPSIS         top

       #include <ctype.h>

       int _tolower(int c);

DESCRIPTION         top

       The _tolower() macro shall be equivalent to tolower(c) except that
       the application shall ensure that the argument c is an uppercase
       letter.

RETURN VALUE         top

       Upon successful completion, _tolower() shall return the lowercase
       letter corresponding to the argument passed.

ERRORS         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       Applications should use the tolower() function instead of the
       obsolescent _tolower() function.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       The _tolower() function may be removed in a future version.

SEE ALSO         top

       tolower(3p), isupper(3p)

       The Base Definitions volume of POSIX.1‐2008, Chapter 7, Locale,
       ctype.h(0p)

COPYRIGHT         top

       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 Electrical 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.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013                        _TOLOWER(3P)

Pages that refer to this page: ctype.h(0p)

HTML rendering created 2018-02-02 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.