Unfortunately, it fails. Given the code below, I get 
[jps@secanaws jps]$ perl ipc-write.pl
Can't call method "pack" on an undefined value at /usr/lib/perl5/5.6.1
+/i386-linux/IPC/Msg.pm line 78.

[download]
If I remove the set call, everything seems to work except the queue being too small. What am I missing? 
#!/usr/bin/perl

use IPC::SysV 
  qw(IPC_PRIVATE IPC_CREAT IPC_NOWAIT);
use IPC::Msg;
use Data::Dumper;

use strict;
use warnings;

my $msgtype = 1;
my $message = "hello nr ";
my $messages = 2000;
my $buf;

my $msg = new IPC::Msg('24h', IPC_CREAT);

$msg->set('qbytes' => 32768);

for (my $i = 0; $i < $messages; $i++) {
  my $rv = $msg->snd($msgtype, 
                     pack("L a*",$msgtype,$message . $i),
                     IPC_NOWAIT);
  print "rv of $i is $rv\n"
}

while ($msg->rcv($buf,256, $msgtype, IPC_NOWAIT)) {
  print "$buf\n";
}

[download]

In reply to Re^2: Resizing IPC::Msg queue size by Jeppe
in thread Resizing IPC::Msg queue size by Jeppe

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