Date: Tue, 30 Aug 2022 16:58:26 +0100 From: Domagoj Stolfa <domagoj.stolfa@gmail.com> To: freebsd-dtrace@freebsd.org Subject: Re: Converting int to a string in DTrace Message-ID: <cce03483-a994-777d-dae0-d28ed779aadd@gmail.com> In-Reply-To: <317C65CC-5BF0-422D-80E9-4340CD241569@FreeBSD.org> References: <317C65CC-5BF0-422D-80E9-4340CD241569@FreeBSD.org>
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Hi Mateusz:
I believe that lltostr might be what you're looking for?
this->unit_number = args[1]->unit_number >= 0 ?
lltostr(args[1]->unit_number) : "";
--
Domagoj
On 8/30/2022 4:49 PM, Mateusz Piotrowski wrote:
> Hello everyone,
>
> Is it possible to convert an int to a string in DTrace?
>
> E.g., I'd like the following script to work (it's an example from
> dtrace_io(4), but with device unit number added):
>
> #!/usr/sbin/dtrace -s
>
> #pragma D option quiet
>
> io:::start
> {
> this->unit_number = args[1]->unit_number >= 0 ?
> (string)args[1]->unit_number : "";
> @[args[1]->device_name, this->unit_number, execname, pid]
> = sum(args[0]->bio_bcount);
> }
>
> END
> {
> printf("%10s%-3s %20s %10s %15s\n", "DEVICE", "", "APP",
> "PID", "BYTES");
> printa("%10s%-3s %20s %10d %15@d\n", @);
> }
>
>
> (Of course, the `(string)` cast does not work here because it's just
> not how DTrace works.)
>
> Best,
> Mateusz
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<p>Hi Mateusz:</p>
<p><br>
</p>
<p>I believe that lltostr might be what you're looking for?</p>
<p><br>
</p>
<div class="">
<div class=""> this->unit_number =
args[1]->unit_number >= 0 ?
lltostr(args[1]->unit_number) : "";</div>
<div class=""><br>
</div>
<div class=""><br>
</div>
<div class="">-- <br>
</div>
<div class="">Domagoj<br>
</div>
<div class=""><br>
</div>
</div>
<div class="moz-cite-prefix">On 8/30/2022 4:49 PM, Mateusz
Piotrowski wrote:<br>
</div>
<blockquote type="cite"
cite="mid:317C65CC-5BF0-422D-80E9-4340CD241569@FreeBSD.org">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
Hello everyone,
<div class=""><br class="">
</div>
<div class="">Is it possible to convert an int to a string in
DTrace?</div>
<div class=""><br class="">
</div>
<div class="">E.g., I'd like the following script to work (it's an
example from dtrace_io(4), but with device unit number added):</div>
<div class=""><br class="">
</div>
<blockquote style="margin: 0 0 0 40px; border: none; padding:
0px;" class="">
<div class="">
<div class="">#!/usr/sbin/dtrace -s</div>
</div>
<div class="">
<div class=""><br class="">
</div>
</div>
<div class="">
<div class="">#pragma D option quiet</div>
</div>
<div class="">
<div class=""><br class="">
</div>
</div>
<div class="">
<div class="">io:::start</div>
</div>
<div class="">
<div class="">{</div>
</div>
<div class="">
<div class=""> this->unit_number =
args[1]->unit_number >= 0 ?
(string)args[1]->unit_number : "";</div>
</div>
<div class="">
<div class=""> @[args[1]->device_name,
this->unit_number, execname, pid] =
sum(args[0]->bio_bcount);</div>
</div>
<div class="">
<div class="">}</div>
</div>
<div class="">
<div class=""><br class="">
</div>
</div>
<div class="">
<div class="">END</div>
</div>
<div class="">
<div class="">{</div>
</div>
<div class="">
<div class=""> printf("%10s%-3s %20s %10s %15s\n",
"DEVICE", "", "APP", "PID", "BYTES");</div>
</div>
<div class="">
<div class=""> printa("%10s%-3s %20s %10d %15@d\n", @);</div>
</div>
<div class="">
<div class="">}</div>
</div>
</blockquote>
<div class="">
<div class=""><br class="">
</div>
</div>
<div class="">(Of course, the `(string)` cast does not work here
because it's just not how DTrace works.)</div>
<div class=""><br class="">
</div>
<div class="">Best,</div>
<div class="">Mateusz</div>
</blockquote>
</body>
</html>
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