libc.info: strupr

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`strupr'--force string to uppercase

*Synopsis*
     #include <string.h>
     char *strupr(char *A);
   *Description*
`strupr' converts each characters in the string at A to upper case.
*Returns*
`strupr' returns its argument, A.
*Portability*
`strupr' is not widely portable.
   `strupr' requires no supporting OS subroutines.