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example
<![CDATA[
#!/usr/bin/perl
#Maillqto - summarize hosts for which there is undeliverable mail
# Steve Kinzler, kinzler@cs.indiana.edu, Oct 91
# http://www.cs.indiana.edu/hyplan/kinzler/home.html#unixadm
$usage = "usage: $0 [ -l ] [ -s ]
-l include mailq output after the summary
-s read mailq output from stdin instead of mailq command\n";
die $usage if $h || @ARGV;
%cal = ('Jan', 0, 'Feb', 31, 'Mar', 59, 'Apr', 90, 'May', 120,
'Jun', 151, 'Jul', 181, 'Aug', 212, 'Sep', 243, 'Oct', 273,
'Nov', 304, 'Dec', 334);
($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) = localtime time;
$now = $yday + ($hour * 60 + $min) / 1440;
$localhost = $ENV{'HOST'} || $ENV{'HOSTNAME'};
chop($localhost = `(hostname) 2> /dev/null`) unless $localhost;
chop($localhost = `uname -n`) unless $localhost;
$localhost =~ s/\..*//;
$localhost = 'localhost' unless $localhost;
open(MAILQ, ($s) ? '< -' : 'mailq |');
@mailq = <MAILQ>;
close(MAILQ);
@items = split(/\n ?[^-\s]/, join('', (@mailq, " A\n")));
shift @items; pop @items;
foreach (@items) {
@__ = split(/\n/);
next unless $__[1] =~
s/^\s{2,}\(((Deferred|reply):?\s*)?(.*)\)\s*$/$3/i;
$age = &age(split(/\s+/, $__[0]));
foreach $i (2 .. $#__) {
$host = &hostname($__[$i]);
$count{$host}++;
$ages{$host} = $age
if ! defined $ages{$host} || $ages{$host} < $age;
}
$reasons{$host} = (($__[1] =~ /^(\s|$)/) ? '' : ' ') . $__[1];
}
foreach (sort byage keys %count) {
$out = sprintf("%2d %s %s%s\n", $count{$_}, &prage($ages{$_}),
$_, $reasons{$_});
$out =~ s/^(.{0,79}).*/$1/;
push(@output, $out);
}
print((@output) ? @output : "Undeliverable mail queue is empty\n");
print "\n", @mailq if $l;
sub byage {
($ages{$a} == $ages{$b}) ? $a gt $b : $ages{$a} < $ages{$b};
}
sub age {
$year-- if $mon == 0 && $_[3] eq 'Dec';
$day = $cal{$_[3]};
$day++ if $year % 4 == 0 && $_[3] ne 'Jan' && $_[3] ne 'Feb';
$_[5] =~ /(.*):(.*)/;
$then = $day + $_[4] - 1 + ($1 * 60 + $2) / 1440;
$age = $now - $then;
$age = (($year % 4 == 0) ? 366 : 365) - $then + $now if $age < 0;
return $age;
}
sub prage {
$days = int($_[0]);
$hrs = ($_[0] - $days) * 24;
$mins = int(($hrs - int($hrs)) * 60);
$hrs = int($hrs);
$hrs = "0$hrs" if $hrs < 10;
$mins = "0$mins" if $mins < 10;
return "$days,$hrs:$mins";
}
sub hostname {
local($_) = $_[0];
s/^\s*//;
s/.*<//;
s/>.*$//;
s/\s.*//;
s/"(.*)::.*"/$1/;
s/^\@?$localhost(|\.[^:@%!]*)://io ||
s/\@$localhost(|\.[^:@%!]*)$//io ||
s/%$localhost(|\.[^:@%!]*)$//io ||
s/^$localhost(|\.[^:@%!]*)!//io;
return $localhost unless /[:@%!]/;
s/:.*//;
s/.*\@//;
s/.*%//;
s/!.*// && (/\./ || s/$/.uucp/);
y/A-Z/a-z/;
$_ = 'UNKNOWN' if /^$/ || /[^+-\.0-9_a-z]/;
return $_;
}
#### END OF SCRIPT
]]>
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