204 lines
7.7 KiB
Perl
204 lines
7.7 KiB
Perl
#!/usr/bin/perl
|
|
#
|
|
# re-mqueue -- requeue messages from queueA to queueB based on age.
|
|
#
|
|
# Contributed by Paul Pomes <ppomes@Qualcomm.COM>.
|
|
# http://www.qualcomm.com/~ppomes/
|
|
#
|
|
# Usage: re-mqueue [-d] queueA queueB seconds
|
|
#
|
|
# -d enable debugging
|
|
# queueA source directory
|
|
# queueB destination directory
|
|
# seconds select files older than this number of seconds
|
|
#
|
|
# Example: re-mqueue /var/spool/mqueue /var/spool/mqueue2 2700
|
|
#
|
|
# Moves the qf* and df* files for a message from /var/spool/mqueue to
|
|
# /var/spool/mqueue2 if the df* file is over 2700 seconds old.
|
|
#
|
|
# The qf* file can't be used for age checking as it's partially re-written
|
|
# with the results of the last queue run.
|
|
#
|
|
# Rationale: With a limited number of sendmail processes allowed to run,
|
|
# messages that can't be delivered immediately slow down the ones that can.
|
|
# This becomes especially important when messages are being queued instead
|
|
# of delivered right away, or when the queue becomes excessively deep.
|
|
# By putting messages that have already failed one or more delivery attempts
|
|
# into another queue, the primary queue can be kept small and fast.
|
|
#
|
|
# On postoffice.cso.uiuc.edu, the primary sendmail daemon runs the queue
|
|
# every thirty minutes. Messages over 45 minutues old are moved to
|
|
# /var/spool/mqueue2 where sendmail runs every hour. Messages more than
|
|
# 3.25 hours old are moved to /var/spool/mqueue3 where sendmail runs every
|
|
# four hours. Messages more than a day old are moved to /var/spool/mqueue4
|
|
# where sendmail runs three times a day. The idea is that a message is
|
|
# tried at least twice in the first three queues before being moved to the
|
|
# old-age ghetto.
|
|
#
|
|
# (Each must be re-formed into a single line before using in crontab)
|
|
#
|
|
# 08 * * * * /usr/local/libexec/re-mqueue /var/spool/mqueue ## /var/spool/mqueue2 2700
|
|
# 11 * * * * /usr/lib/sendmail -oQ/var/spool/mqueue2 -q > ## > /var/log/mqueue2 2>&1
|
|
# 38 * * * * /usr/local/libexec/re-mqueue /var/spool/mqueue2
|
|
# /var/spool/mqueue3 11700
|
|
# 41 1,5,9,13,17,21 * * * /usr/lib/sendmail -oQ/var/spool/mqueue3 -q ## > /var/log/mqueue3 2>&1
|
|
# 48 * * * * /usr/local/libexec/re-mqueue /var/spool/mqueue3
|
|
# /var/spool/mqueue4 100000
|
|
#53 3,11,19 * * * /usr/lib/sendmail -oQ/var/spool/mqueue4 -q > ## > /var/log/mqueue4 2>&1
|
|
#
|
|
#
|
|
# N.B., the moves are done with link(). This has two effects: 1) the mqueue*
|
|
# directories must all be on the same filesystem, and 2) the file modification
|
|
# times are not changed. All times must be cumulative from when the df*
|
|
# file was created.
|
|
#
|
|
# Copyright (c) 1995 University of Illinois Board of Trustees and Paul Pomes
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions
|
|
# are met:
|
|
# 1. Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer.
|
|
# 2. Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in the
|
|
# documentation and/or other materials provided with the distribution.
|
|
# 3. All advertising materials mentioning features or use of this software
|
|
# must display the following acknowledgement:
|
|
# This product includes software developed by the University of
|
|
# Illinois at Urbana and their contributors.
|
|
# 4. Neither the name of the University nor the names of their contributors
|
|
# may be used to endorse or promote products derived from this software
|
|
# without specific prior written permission.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE TRUSTEES AND CONTRIBUTORS ``AS IS'' AND
|
|
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
# ARE DISCLAIMED. IN NO EVENT SHALL THE TRUSTEES OR CONTRIBUTORS BE LIABLE
|
|
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
# SUCH DAMAGE.
|
|
#
|
|
# @(#)$Id: re-mqueue.pl,v 1.1.1.1 1996/11/18 04:31:56 mrg Exp $
|
|
|
|
require "syslog.pl";
|
|
|
|
$LOCK_EX = 2;
|
|
$LOCK_NB = 4;
|
|
$LOCK_UN = 8;
|
|
|
|
# Count arguments, exit if wrong in any way.
|
|
die "Usage: $0 [-d] queueA queueB seconds\n" if ($#ARGV < 2);
|
|
|
|
while ($_ = $ARGV[0], /^-/) {
|
|
shift;
|
|
last if /^--$/;
|
|
/^-d/ && $debug++;
|
|
}
|
|
|
|
$queueA = shift;
|
|
$queueB = shift;
|
|
$age = shift;
|
|
|
|
die "$0: $queueA not a directory\n" if (! -d $queueA);
|
|
die "$0: $queueB not a directory\n" if (! -d $queueB);
|
|
die "$0: $age isn't a valid number of seconds for age\n" if ($age =~ /\D/);
|
|
|
|
# chdir to $queueA and read the directory. When a df* file is found, stat it.
|
|
# If it's older than $age, lock the corresponding qf* file. If the lock
|
|
# fails, give up and move on. Once the lock is obtained, verify that files
|
|
# of the same name *don't* already exist in $queueB and move on if they do.
|
|
# Otherwise re-link the qf* and df* files into $queueB then release the lock.
|
|
|
|
chdir "$queueA" || die "$0: can't cd to $queueA: $!\n";
|
|
opendir (QA, ".") || die "$0: can't open directory $queueA for reading: $!\n";
|
|
@dfiles = grep(/^df/, readdir(QA));
|
|
$now = time();
|
|
($program = $0) =~ s,.*/,,;
|
|
&openlog($program, 'pid', 'mail');
|
|
|
|
# Loop through the dfiles
|
|
while ($dfile = pop(@dfiles)) {
|
|
print "Checking $dfile\n" if ($debug);
|
|
($qfile = $dfile) =~ s/^d/q/;
|
|
($mfile = $dfile) =~ s/^df//;
|
|
if (! -e $dfile || -z $dfile) {
|
|
print "$dfile is gone or zero bytes - skipping\n" if ($debug);
|
|
next;
|
|
}
|
|
if (! -e $qfile || -z $qfile) {
|
|
print "$qfile is gone or zero bytes - skipping\n" if ($debug);
|
|
next;
|
|
}
|
|
|
|
$mtime = $now;
|
|
($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
|
|
$atime,$mtime,$ctime,$blksize,$blocks) = stat($dfile);
|
|
|
|
# Compare timestamps
|
|
if (($mtime + $age) > $now) {
|
|
printf ("%s is %d seconds old - skipping\n", $dfile, $now-$mtime) if ($debug);
|
|
next;
|
|
}
|
|
|
|
# See if files of the same name already exist in $queueB
|
|
if (-e "$queueB/$dfile") {
|
|
print "$queueb/$dfile already exists - skipping\n" if ($debug);
|
|
next;
|
|
}
|
|
if (-e "$queueB/$qfile") {
|
|
print "$queueb/$qfile already exists - skipping\n" if ($debug);
|
|
next;
|
|
}
|
|
|
|
# Try and lock qf* file
|
|
unless (open(QF, ">>$qfile")) {
|
|
print "$qfile: $!\n" if ($debug);
|
|
next;
|
|
}
|
|
$retval = flock(QF, $LOCK_EX|$LOCK_NB) || ($retval = -1);
|
|
if ($retval == -1) {
|
|
print "$qfile already flock()ed - skipping\n" if ($debug);
|
|
close(QF);
|
|
next;
|
|
}
|
|
print "$qfile now flock()ed\n" if ($debug);
|
|
|
|
# Show time! Do the link()s
|
|
if (link("$dfile", "$queueB/$dfile") == 0) {
|
|
&syslog('err', 'link(%s, %s/%s): %m', $dfile, $queueB, $dfile);
|
|
print STDERR "$0: link($dfile, $queueB/$dfile): $!\n";
|
|
exit (1);
|
|
}
|
|
if (link("$qfile", "$queueB/$qfile") == 0) {
|
|
&syslog('err', 'link(%s, %s/%s): %m', $qfile, $queueB, $qfile);
|
|
print STDERR "$0: link($qfile, $queueB/$qfile): $!\n";
|
|
unlink("$queueB/$dfile");
|
|
exit (1);
|
|
}
|
|
|
|
# Links created successfully. Unlink the original files, release the
|
|
# lock, and close the file.
|
|
print "links ok\n" if ($debug);
|
|
if (unlink($qfile) == 0) {
|
|
&syslog('err', 'unlink(%s): %m', $qfile);
|
|
print STDERR "$0: unlink($qfile): $!\n";
|
|
exit (1);
|
|
}
|
|
if (unlink($dfile) == 0) {
|
|
&syslog('err', 'unlink(%s): %m', $dfile);
|
|
print STDERR "$0: unlink($dfile): $!\n";
|
|
exit (1);
|
|
}
|
|
flock(QF, $LOCK_UN);
|
|
close(QF);
|
|
&syslog('info', '%s moved to %s', $mfile, $queueB);
|
|
print "Done with $dfile $qfile\n\n" if ($debug);
|
|
}
|
|
exit 0;
|