120 lines
2.3 KiB
Perl
120 lines
2.3 KiB
Perl
#!/usr/bin/perl
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use Fcntl ':flock';
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$QMAIL = "/var/qmail";
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$CONTROL = "$QMAIL/control";
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open LOG, ">>", "/tmp/qmail-remote-log";
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{ my $ofh = select LOG; $|=1; select $ofh; }
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Log("starting");
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$msgs = 0;
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$time = 0;
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load_policy();
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while(1) {
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my @last = grep {$_ > time() - $time} read_log();
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Log("status " . @last . "/$msgs");
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if (@last >= $msgs) {
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# Log("sleeping");
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} else {
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last;
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}
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while (@last >= $msgs) {
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my $oldest = $last[0];
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my $age = time() - $oldest;
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# When will the oldest message expire off the queue?
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# The end of the queue is $time seconds ago
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# The age of the oldest message is now time() - $oldest
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# The oldest message will expire in $time - $age seconds
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my $zzz = $time - $age + int(rand(3));
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$zzz = 1 if $zzz < 1;
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# Log("Sleeping for $zzz secs");
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sleep $zzz;
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shift @last while @last && $last[0] < time() - $time;
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load_policy();
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}
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}
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append_log(time());
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#if (open F, ">>", "/tmp/qmail-remote-log") {
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# print F time(), " @ARGV\n";
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#}
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Log("sending @ARGV");
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exec "/var/qmail/bin/qmail-remote.real", @ARGV;
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exit 0;
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sub fail {
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my $msg = shift;
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Log("fail: $msg");
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print "Z$msg";
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exit 0;
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}
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my $last_policy_load ;
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sub load_policy {
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my $POLICY = "$CONTROL/outratelimit";
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return if ((stat($POLICY))[9] <= $last_policy_load);
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if (open F, "<", $POLICY) {
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chomp(my $line = <F>);
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($msgs, $time) = split m{/}, $line;
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if (defined $last_policy_load) {
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Log("Policy changed to $msgs/$time");
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}
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$last_policy_load = time();
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close F;
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}
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}
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sub read_log {
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lock_semaphore(LOCK_SH);
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my @last;
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if (open(F, "+<", "$CONTROL/outlog")) {
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chomp(@last = <F>);
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close F;
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}
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lock_semaphore(LOCK_UN);
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return @last;
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}
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sub append_log {
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lock_semaphore(LOCK_EX);
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if (open(F, "+<", "$CONTROL/outlog")) {
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my @last = grep {$_ > time() - $time} <F>;
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chomp(@last);
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truncate F, 0;
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seek F, 0, 0;
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print F join "\n", @last, @_, "";
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close F;
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}
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lock_semaphore(LOCK_UN);
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}
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sub lock_semaphore {
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if (open SEM, ">", "$CONTROL/qmail-remote-semaphore") {
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flock(SEM, $_[0]) or fail("Couldn't lock semaphore: $!");
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} else {
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fail("Couldn't open semaphore: $!");
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}
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}
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sub Log {
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my @args = @_;
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tr/\n//d for @args;
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print LOG time(), " $$ @args\n";
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}
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