dtrace discuss - Aug 2005 - printf and the %ws conversion

When using the %ws conversion in printf i get:

dtrace: failed to compile script script.d: line 9: printf( ) argument #2 is
incompatible with conversion #1 prototype:
        conversion: %ws
         prototype: wchar_t []
          argument: char *

However, the wchar_t type does not seem to exist. What''s wrong in my
script?
This message posted from opensolaris.org

Here is the (edited) script:

#!/usr/sbin/dtrace -s

this char * p;

pid$target::mystery_function:entry
{
	printf("%a\n", arg1);
        this->p = copyin(arg1,64);
        printf("inarg1: %ws", this->p);
}
This message posted from opensolaris.org

Hi,

	which is the type of arg1 for your "mystery_function"??

	you''re defining "this->p" as (char *) but printing with
%ws ("..The
argument must be a pointer to an array of wchar_t.." hence the error.

	if arg1 is (char *) you must use %s in printf...

HTH,
Gonzalo.

Simon Marechal wrote:
> Here is the (edited) script:
> 
> #!/usr/sbin/dtrace -s
> 
> this char * p;
> 
> pid$target::mystery_function:entry
> {
> 	printf("%a\n", arg1);
>         this->p = copyin(arg1,64);
>         printf("inarg1: %ws", this->p);
> }
> This message posted from opensolaris.org
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org

It is an unicode string. I guess the closest type is short *. Using %s wont work
because of the interleaved 0''s.

I right now use something like:

printf("%c%c%c%c ...", this->p[0], this->p[2], this->p[4],
...);

which is not good since i cannot predict the string length
This message posted from opensolaris.org