I suggest running the script using strace:
strace -e trace=file php myscript.php
and taking a look to see what the underlying read/write syscalls are up to.
--Wez.
On 1/23/06, Mark Krenz <[EMAIL PROTECTED]> wrote:
>
> Thanks for your help. stream_copy_to_stream does seem like a better
> way to go. However I still have the same problem. Only 65536 bytes are
> written to /tmp/output.txt. Here is the new source code based on your
> ideas:
>
> --------------------------------------------------------------------------
> $program = "/usr/bin/dd of=/tmp/output.txt";
>
> $descriptorspec = array(
> 0 => array("pipe", "r"),
> 1 => array("pipe", "w"),
> 2 => array("file", "/tmp/error-output.txt", "a")
> );
>
> $cwd = '/var/www';
> $env = array('HOME' => '/var/www');
>
> $process = proc_open($program, $descriptorspec, $pipes, $cwd, $env);
>
> if (is_resource($process)) {
>
> stream_set_blocking($pipes[0], FALSE);
> stream_set_blocking($pipes[1], FALSE);
>
> $handle = fopen("/usr/share/dict/words", "r");
>
> stream_copy_to_stream($handle, $pipes[0]);
> fclose($pipes[0]);
> fclose($handle);
> $output = stream_get_contents($pipes[1]);
> fclose($pipes[1]);
>
> print "<PRE>$output</PRE><BR><BR>\n";
>
> $return_value = proc_close($process);
>
> echo "command returned $return_value\n";
> }
> --------------------------------------------------------------------------
>
> I switched to using dd instead of cat because using cat made the
> situation more complex (because it sends back data as it gets it). The
> program I'm going to eventually do this with doesn't do that.
>
>
> On Mon, Jan 23, 2006 at 02:08:55PM GMT, Wez Furlong [EMAIL PROTECTED] said
> the following:
> > There are quite a few bad streams usages there.
> >
> > I'd rewrite your code like this:
> >
> > $words = fopen('/usr/share/dict/words', 'r');
> > stream_copy_to_stream($words, $pipes[0]);
> > fclose($pipes[0]);
> > fclose($words);
> > $output = stream_get_contents($pipes[1]);
> > fclose($pipes[1]);
> > proc_close($process);
> >
> > My guess at the cause of the problem was that you're tying to write
> > 2MB into a pipe, and the underlying write() syscall could only write
> > 64k; since you're ignoring the return code from fwrite(), you're
> > missing this vital fact.
> >
> > Using the streams functions in PHP 5 helps you to write code that
> > "does what I mean", and makes for shorter, more readable code.
> >
> > --Wez.
> >
> > PS: http://netevil.org/talks/PHP-Streams-Lucky-Dip.pdf
> > has some tips and insider knowledge on using streams in PHP.
> >
> >
> >
> > On 1/23/06, Mark Krenz <[EMAIL PROTECTED]> wrote:
> > > stream_set_blocking($pipes[0], FALSE);
> > > stream_set_blocking($pipes[1], FALSE);
> > >
> > > $handle = fopen("/usr/share/dict/words", "r");
> > > while (!feof($handle)) {
> > > $input .= fread($handle, 8192);
> > > }
> > >
> > > fwrite($pipes[0], $input);
> > > fclose($handle);
> > > fclose($pipes[0]);
> > >
> > > while (!feof($pipes[1])) {
> > > $output .= fgets($pipes[1], 8192);
> > > }
> > > fclose($pipes[1]);
> > >
> > > print "<PRE>$output</PRE><BR><BR>\n";
> > >
> > > $return_value = proc_close($process);
> > >
> > > echo "command returned $return_value\n";
> > > }
> >
>
>
> --
> Mark S. Krenz
> IT Director
> Suso Technology Services, Inc.
> http://suso.org/
>
> --
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