source: trunk/third/sendmail/contrib/movemail.pl @ 19204

#!/usr/bin/perl -w
#
# Move old mail messages between queues by calling re-mqueue.pl.
#
# movemail.pl [config-script]
#
# Default config script is /usr/local/etc/movemail.conf.
#
# Graeme Hewson <graeme.hewson@oracle.com>, June 2000
#

use strict;

# Load external program as subroutine to avoid
# compilation overhead on each call

sub loadsub {
    my $fn = shift
        or die "Filename not specified";
    my $len = (stat($fn))[7]
        or die "Can't stat $fn: $!";
    open PROG, "< $fn"
        or die "Can't open $fn: $!";
    my $prog;
    read PROG, $prog, $len
        or die "Can't read $fn: $!";
    close PROG;
    eval join "",
        'return sub { my @ARGV = @_; $0 = $fn; no strict;',
        "$prog",
        '};';
}

my $progname = $0;
my $lastage = -1;
my $LOCK_EX = 2;
my $LOCK_NB = 4;

# Load and eval config script

my $conffile = shift || "/usr/local/etc/movemail.conf";
my $len = (stat($conffile))[7]
    or die "Can't stat $conffile: $!";
open CONF, "< $conffile"
    or die "Can't open $conffile: $!";
my $conf;
read CONF, $conf, $len
    or die "Can't read $conffile: $!";
close CONF;
use vars qw(@queues $subqbase @ages $remqueue $lockfile);
eval $conf;

if ($#queues < 1) {
    print "$progname: there must be at least two queues\n";
    exit 1;
}

if ($#ages != ($#queues - 1)) {
    print "$progname: wrong number of ages (should be one less than number of queues)\n";
    exit 1;
}

# Get lock or exit quietly.  Useful when running from cron.

if ($lockfile) {
    open LOCK, ">>$lockfile"
        or die "Can't open lock file: $!";
    unless (flock LOCK, $LOCK_EX|$LOCK_NB) {
        close LOCK;
        exit 0;
    }
}

my $remsub = loadsub($remqueue);

# Go through directories in reverse order so as to check spool files only once

for (my $n = $#queues - 1; $n >= 0; $n--) {
    unless ($ages[$n] =~ /^\d+$/) {
        print "$progname: invalid number $ages[$n] in ages array\n";
        exit 1;
    }
    unless ($lastage < 0 || $ages[$n] < $lastage) {
        print "$progname: age $lastage is not > previous value $ages[$n]\n";
        exit 1;
    }
    $lastage = $ages[$n];
    if ($subqbase) {
        my $subdir;
        opendir(DIR, $queues[$n])
            or die "Can't open $queues[$n]: $!";
        foreach $subdir ( grep { /^$subqbase/ } readdir DIR) {
            &$remsub("$queues[$n]/$subdir", "$queues[$n+1]/$subdir",
                $ages[$n]);
        }
        closedir(DIR);
    } else {
        # Not using subdirectories
        &$remsub($queues[$n], $queues[$n+1], $ages[$n]);
    }
}

if ($lockfile) {
    unlink $lockfile;
    close LOCK;
}