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diff --git a/cron/cull_bad_shunt b/cron/cull_bad_shunt
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+#! @PYTHON@
+#
+# Copyright (C) 2008 by the Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+# USA.
+
+"""Cull bad and shunt queues, recommended once per day.
+
+This script goes through the 'bad' and 'shunt' queue directories and,
+if mm_cfg.BAD_SHUNT_STALE_AFTER is > 0, it removes all files more than
+that many seconds old.
+
+If mm_cfg.BAD_SHUNT_ARCHIVE_DIRECTORY is a writable directory, the old
+files are moved there. Otherwise they are deleted.
+
+Only regular files immediately subordinate to the 'bad' and 'shunt'
+directories are processed. Anything else is skipped.
+
+Usage: %(PROGRAM)s [options]
+
+Options:
+    -h / --help
+        Print this message and exit.
+"""
+
+import os
+import sys
+import stat
+import time
+import errno
+import getopt
+
+import paths
+# mm_cfg must be imported before the other modules, due to the side-effect of
+# it hacking sys.paths to include site-packages.  Without this, running this
+# script from cron with python -S will fail.
+from Mailman import mm_cfg
+from Mailman.i18n import _
+
+# Work around known problems with some RedHat cron daemons
+import signal
+signal.signal(signal.SIGCHLD, signal.SIG_DFL)
+
+PROGRAM = sys.argv[0]
+
+
+
+def usage(code, msg=''):
+    if code:
+        fd = sys.stderr
+    else:
+        fd = sys.stdout
+    print >> fd, _(__doc__)
+    if msg:
+        print >> fd, msg
+    sys.exit(code)
+
+
+
+def main():
+    try:
+        opts, args = getopt.getopt(
+            sys.argv[1:], 'h', ['help'])
+    except getopt.error, msg:
+        usage(1, msg)
+
+    if args:
+        usage(1)
+
+    if mm_cfg.BAD_SHUNT_STALE_AFTER <= 0:
+        # Nothing to do
+        return
+    now = time.time()
+    old = now - float(mm_cfg.BAD_SHUNT_STALE_AFTER)
+    os.stat_float_times(True)
+    adir = mm_cfg.BAD_SHUNT_ARCHIVE_DIRECTORY
+    if (adir and os.access(adir, os.W_OK | os.X_OK)
+             and stat.S_ISDIR(os.stat(adir).st_mode)):
+        pass
+    else:
+        if adir:
+            print >>sys.stderr, '%s: archive directory %s not usable.' % (
+                    PROGRAM, adir)
+        adir = None
+    for qdir in (mm_cfg.BADQUEUE_DIR, mm_cfg.SHUNTQUEUE_DIR):
+        try:
+            names = os.listdir(qdir)
+        except OSError, e:
+            if e.errno <> errno.ENOENT:
+                # OK if qdir doesn't exist, else
+                raise
+            continue
+        for name in names:
+            pathname = os.path.join(qdir, name)
+            pstat = os.stat(pathname)
+            if not stat.S_ISREG(pstat.st_mode):
+                # Not a regular file
+                continue
+            if pstat.st_mtime > old:
+                # File is new
+                continue
+            if adir:
+                os.rename(pathname, os.path.join(adir, name))
+            else:
+                os.remove(pathname)
+
+
+
+if __name__ == '__main__':
+    main()