Timeouts for blocking calls

I am attempting to write to a named pipe using fwrite(). Unfortunately
fwrite() will block until the pipe is read by an external program. This
call does not have a timeout parameter and I have not seen any equivalent
calls that do. I have been looking for a callback routine so that fwrite()
does not block forever. Something like this:

function no_reader() {
echo "Could not write to pipe";
exit(-1);
}

$pipe = fopen("/tmp/pipe","w");
$cb = callback_new("no_reader", 5); // Call no_reader() in 5 seconds.
fwrite($pipe,"some text");
callback_destroy($cb); // Stop the callback because fwrite() returned.

Is there anything in PHP that can do something like this?
--
Steven Farlie

Hi Steven!

On Tue, 09 Sep 2003 16:17:37 +0200, Steven Farlie
<steven.farlie@blip.anu.blip.edu.blop.au> wrote:

>I am attempting to write to a named pipe using fwrite(). Unfortunately
>fwrite() will block until the pipe is read by an external program. This
>call does not have a timeout parameter and I have not seen any equivalent
>calls that do. I have been looking for a callback routine so that fwrite()
>does not block forever. Something like this:
>
>function no_reader() {
> echo "Could not write to pipe";
> exit(-1);
>}
>
>$pipe = fopen("/tmp/pipe","w");
>$cb = callback_new("no_reader", 5); // Call no_reader() in 5 seconds.
>fwrite($pipe,"some text");
>callback_destroy($cb); // Stop the callback because fwrite() returned.
>
>Is there anything in PHP that can do something like this?


I think I saw the functionality in the socket functions, but they also
seem to be very buggy. I would recommend a perl or c wrapper for this.

HTH, Jochen

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