Net::Server::PreforkSimple and External Commands

[afrinspray]

I'm using the Net::Server:reForkSimple framework and
Net::Server::Mail::ESMTP to make a content filter for postfix. I need
to call an external program in the data callback of Mail::ESMTP but I'm
having trouble executing external commands with Exec, System and
Backticks. Perl returns no errors, and the SMTP client is disconnected
immediately when calling the command (I just put an echo command in for
testing, so it's not that).

Does Net::Server:reforkSimple allow external commands to be executed?
Any ideas?

Thanks,

Mike

 

[Anno Siegel]

I'm using the Net::Server:reForkSimple framework and
Net::Server::Mail::ESMTP to make a content filter for postfix. I need
to call an external program in the data callback of Mail::ESMTP but I'm
having trouble executing external commands with Exec, System and
Backticks. Perl returns no errors, and the SMTP client is disconnected
immediately when calling the command (I just put an echo command in for
testing, so it's not that).

Does Net::Server:reforkSimple allow external commands to be executed?
Any ideas?

I don't know the module, but it would have to go through tremendous
contortions to forbid "exec" and "system".

Show a short program that demonstrates the behavior. Someone who
happens to have Net::Server:reforkSimple may be able to run it
and find out what's wrong.

Anno

 

[afrinspray]

Sorry I didn't respond this weekend.
Here's an example. "Got here" is printed to the client socket, but
"got here 2" is not.

-------------------------------------------------------------------

#!/usr/bin/perl -w
package PreForkSimpleTest;


use Net::Server:reForkSimple;
@ISA = qw(Net::Server:reForkSimple);

sub process_request
{
my $self = shift;

my $sock = $self->{server}->{client};

print $sock "Got Here\n";
my $cmd = `echo Hello`;
print $sock "Got Here 2\n";

}

__PACKAGE__->run(20205);

1;

 

[afrinspray]

Sorry... the bottom of the example (run(20205)) is not correct. Just
remove the 20205 and it will default to port 20203.

Thanks,
Mike

 

[afrinspray]

Sorry to bump this post, but I still haven't found an answer (two weeks
later). Can anyone think of any reason why a forked process of a
PreForkSimple object wouldn't be able to execute external programs?

 

[xhoster]

Sorry to bump this post, but I still haven't found an answer (two weeks
later). Can anyone think of any reason why a forked process of a
PreForkSimple object wouldn't be able to execute external programs?

I would guess it has something to do with chroot.

Xho