delete all characters that aren't a letter or number

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wconv

wconv(3C)																 wconv(3C)

NAME

       towupper(), towlower() - translate wide characters

SYNOPSIS

   Remarks:
       These  functions  are compliant with the XPG4 Worldwide Portability Interface wide-character conversion functions.  They parallel the 8-bit
       character conversion functions defined in conv(3C).

DESCRIPTION

       and have as domain a the value of which is representable as a or the value If the argument has any other value, the behavior is	undefined.
       If  the	argument  of  represents  a  lowercase letter, the result is the corresponding uppercase letter.  If the argument of represents an
       uppercase letter, the result is the corresponding lowercase letter.  All other arguments are returned unchanged.

       Definitions for these functions, the types and the value are provided in the header.

EXTERNAL INFLUENCES

   Locale
       The category determines the translations to be done.

   International Code Set Support
       Single-byte and multi-byte character code sets are supported.

AUTHOR

       was developed by IBM, OSF, and HP.

SEE ALSO

       conv(3C), multibyte(3C), wctype(3C), setlocale(3C), lang(5), thread_safety(5).

STANDARDS CONFORMANCE

																	 wconv(3C)

Shell Programming and Scripting