http://qs1969.pair.com?node_id=551292


in reply to hashing out lines from mailq...

This is a dumb brute-force parser for the output of mailq. If you just want to get the messages from MAILER-DAEMON you can check $entry->{from} when you are iterating over @entries: 

my $header = 1;
my @entries;
my $entry = {};
while(<>)
{
   if ($header)
   {
      $header = 0 if /^--/;
      next;
    }
    if (/^(\S+)\s+(\d+)\s+(.+?)\s+<?(\S+)>?/)
    {
       push @entries, $entry if exists $entry->{msg_id};
       $entry = {};
       $entry->{msg_id} = $1;
       $entry->{size}  = $2;
       $msg->{date} = $3;
       $msg->{from} = $4;
    }
    elsif (/\s+\((.*)\)/)
    {
      $entry->{message} = $1;
    }
    elsif ( /\s+<(.*)>?/ )
    {
       $entry->{recipients} = [] unless exists $entry->{recipients};
       push @{$entry->{recipients}}, $1;
    }
}
 
push @entries, $entry if exists $entry->{msg_id};
 
foreach $entry ( @entries )
{
    print $entry->{msg_id}, join " ", @{$entry->{recipients}},"\n";
}

[download]

/J\

Replies are listed 'Best First'.
Re^2: hashing out lines from mailq...
by perlknight (Pilgrim) on May 24, 2006 at 14:54 UTC
    Thanks. How would I go about geting the following for all deferred messages: qid, from, all recipients? Is there a better way of doing this besides parsing the output of mailq with regex? Thanks.
[reply]

      That code does it, you just have to look for 'Defered' in $entry->{message}. The only other alternative (for sendmail at least) is to parse all of the 'q' files in /var/spool/mqueue, which will almost certainly by more of a pain.

      /J\

[reply]
[d/l]

In Section Seekers of Perl Wisdom