IPC Open
Hi,
I have the following subroutine in a package that's called by an embperl
page via mod_perl:
sub MP3Check {
my ($self,$params) = @_;
use IPC::Open3;
my ($pid,%values);
$SIG{ALRM} = sub {
my $kill = kill -9 $pid;
system($kill);
$values{'CHECK_PROBLEM'} = 1;
return;
};
my $command = qq!$self-{MP3Check} -v $params-{file}!;
alarm(5);
$pid = open3(*IN, *OUT, *ERR, $command);
waitpid $pid, 0;
alarm(0);
close(IN);
my @outlines = OUT;
for ( @outlines ) {
$values{$1} = $2 if /^([A-Z_]+)\s+(.*)$/;
}
return \%values;
}
I'm getting the error message:
[16307]ERR: 24: Error in Perl code: Can't locate object method OPEN via
package Apache::RequestRec at /usr/lib/perl5/5.8.0/IPC/Open3.pm line 136.
I read a post that mentions:
OPEN was added after 1.99_08. Please build the cvs version of mod_perl 2.0:
http://perl.apache.org/download/source.html#2_0_Development_Source_Distribut
ion
I then found this info on building an RPM from CVS:
http://www.gossamer-threads.com/archive/mod_perl_C1/modperl_F7/mod_perl-1.99
_09_for_Redhat_9_P68324/
I got the spec file and built a new rpm:
mod_perl-2.0_cvs-1.99.10
However, I still get the same error...
Can any one give me any ideas on how to fix this?
I also read a post about IPC::Open... I looked at the synopsis and it looks
rather complicated. Is this definately a better way to go?
Any help would be greatly appreciated.
Cameron
Re: IPC Open / IPC Run
On Fri, Jul 18, 2003 at 12:30:22PM -0500, Cameron B. Prince wrote: I just realized, I meant to say IPC::Run below from my previous post. I also read a post about IPC::Open... I looked at the synopsis and it looks rather complicated. Only if you're trying to do something complicated, like keep a long lived subprocess around and interact with it. For batch mode subprocesses, all you need is run(). You might also try IPC::Run3 which is less bloated, but uses temp files instead of select() to Keep It Simple, Slaymaker. Is this definately a better way to go? Define better ;). Simpler, yes, if what you're trying to do is simpler. - Barrie
Re: IPC Open
I'm getting the error message: [16307]ERR: 24: Error in Perl code: Can't locate object method OPEN via package Apache::RequestRec at /usr/lib/perl5/5.8.0/IPC/Open3.pm line 136. perl -MApache2 -MModPerl::MethodLookup -e print_method OPEN to use method 'OPEN' add: use Apache::RequestIO (); __ Stas BekmanJAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide --- http://perl.apache.org mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com http://modperlbook.org http://apache.org http://ticketmaster.com
Re: [mp2] Apache::RequestRec, IPC::Open[23] problem
On Wed, 2003-01-22 at 08:10, Stas Bekman wrote: Please try again with the latest cvs, I've just ported FILENO, OPEN and CLOSE interfaces from 1.0. Though I doubt that this will work, IPC::Open* have always had problems with mod_perl. IPC::Run should be used instead for now. Hopefully will be able to look more into this issue much later unless someone beats me to it. Thanks for the quick reply, Stas. I tried it out and that particular error is gone now, but the W3C Validator still doesn't quite work, whereas as a normal CGI it does. I didn't notice any errors, but valid pages just don't validate under mod_perl (they do as normal CGI). I know this is a too vague explanation, but I don't have time to dig deeper now. Cheers, -- \/ille Skyttä ville.skytta at iki.fi
Re: [mp2] Apache::RequestRec, IPC::Open[23] problem
Ville Skyttä wrote: On Wed, 2003-01-22 at 08:10, Stas Bekman wrote: Please try again with the latest cvs, I've just ported FILENO, OPEN and CLOSE interfaces from 1.0. Though I doubt that this will work, IPC::Open* have always had problems with mod_perl. IPC::Run should be used instead for now. Hopefully will be able to look more into this issue much later unless someone beats me to it. Thanks for the quick reply, Stas. I tried it out and that particular error is gone now, but the W3C Validator still doesn't quite work, whereas as a normal CGI it does. I didn't notice any errors, but valid pages just don't validate under mod_perl (they do as normal CGI). I know this is a too vague explanation, but I don't have time to dig deeper now. As I said, the IPC::Open* family is usually not working under mod_perl (1.0 and 2.0). Nobody has looked into resolving this issue, mainly because IPC::Run seems to be a much better alternative. But that doesn't solve the problem for those who are stuck with an existing code and aren't able to adjust it. Therefore since IPC::Run provides the same functionality and more, may be a special IPC::Open* layer can be provided which will transparently replace IPC::Open* with IPC::Run. __ Stas BekmanJAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide --- http://perl.apache.org mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com http://modperlbook.org http://apache.org http://ticketmaster.com
[mp2] Apache::RequestRec, IPC::Open[23] problem
Hi,
The script below under mod_perl 1.99_08 (ModPerl::Registry), gives me
this:
Can't locate object method FILENO via package
Apache::RequestRec at /usr/lib/perl5/5.8.0/IPC/Open3.pm line 196.
A real world example of a script that has these problems is the W3C
Markup Validator,
http://dev.w3.org/cvsweb/validator/httpd/cgi-bin/check?rev=1.200.2.79.
The validator works under mod_perl 1, and I guess the test script would
as well (I'm unable to verify that at the moment, though). Maybe a
mod_perl 2 bug/missing feature?
My installation is Red Hat 8.0, Apache 2.0.40, mod_perl 1.99_08 and Perl
5.8.0. The test script:
use IPC::Open2 qw(open2);
use IO::File ();
my $in = IO::File-new_tmpfile();
my $out = IO::File-new_tmpfile();
print $in foobar\n;
seek $in, 0, 0;
print Content-Type: text/plain\n\n;
my $pid = open2($out, $in, 'tee');
undef $in;
waitpid $pid, 0;
seek $out, 0, 0;
while ($out) {
print;
}
undef $out;
Cheers,
--
\/ille Skyttä
ville.skytta at iki.fi
Re: [mp2] Apache::RequestRec, IPC::Open[23] problem
Ville Skyttä wrote:
Hi,
The script below under mod_perl 1.99_08 (ModPerl::Registry), gives me
this:
Can't locate object method FILENO via package
Apache::RequestRec at /usr/lib/perl5/5.8.0/IPC/Open3.pm line 196.
A real world example of a script that has these problems is the W3C
Markup Validator,
http://dev.w3.org/cvsweb/validator/httpd/cgi-bin/check?rev=1.200.2.79.
The validator works under mod_perl 1, and I guess the test script would
as well (I'm unable to verify that at the moment, though). Maybe a
mod_perl 2 bug/missing feature?
My installation is Red Hat 8.0, Apache 2.0.40, mod_perl 1.99_08 and Perl
5.8.0. The test script:
use IPC::Open2 qw(open2);
use IO::File ();
my $in = IO::File-new_tmpfile();
my $out = IO::File-new_tmpfile();
print $in foobar\n;
seek $in, 0, 0;
print Content-Type: text/plain\n\n;
my $pid = open2($out, $in, 'tee');
undef $in;
waitpid $pid, 0;
seek $out, 0, 0;
while ($out) {
print;
}
undef $out;
Please try again with the latest cvs, I've just ported FILENO, OPEN and CLOSE
interfaces from 1.0. Though I doubt that this will work, IPC::Open* have
always had problems with mod_perl. IPC::Run should be used instead for now.
Hopefully will be able to look more into this issue much later unless someone
beats me to it.
__
Stas BekmanJAm_pH -- Just Another mod_perl Hacker
http://stason.org/ mod_perl Guide --- http://perl.apache.org
mailto:[EMAIL PROTECTED] http://use.perl.org http://apacheweek.com
http://modperlbook.org http://apache.org http://ticketmaster.com
