howdy-
i wrote the onchange patch which was added to vpopmail version
5.4.15. if you're not familiar with it, it allows the administrator
to set up a ~vpopmail/etc/onchange script which is automatically
executed whenever something changes with vpopmail's status, i.e. when
a domain, mailbox, or alias is added or removed, or a password is
changed.
my reason for writing this is to support the validrcptto.cdb patch
that i wrote for qmail. it enables qmail to consult a cdb file
containing every valid recipient address on the system, and reject
incoming messages which are being sent to non-existent users.
http://qmail.jms1.net/patches/validrcptto.cdb.shtml
the idea is that whenever something changes- mailbox, alias,
whatever- the list of valid recipient addresses also changes, which
means that the validrcptto.cdb file needs to be re-generated. i have
a daemontools service that i call qmail-updater, which waits for
input on a named pipe and then runs a script as root. the named pipe
is writable by any user. the root script re-generates the
validrcptto.cdb and auth.cdb files, and then for one of my clients,
pushes those files out to three other machines which pre-process the
flood of incoming mail through rblsmtpd, clamav, and spamassassin,
and then hand the messages to the mailbox server.
http://qmail.jms1.net/scripts/qmail-updater.shtml
http://qmail.jms1.net/mailhub.shtml
of course the onchange functionality can be used for other things-
to automatically make a final backup of a mailbox before deleting it,
for example.
anyway.
somebody using the vpopmail onchange patch, along with qmailadmin,
reported that qmailadmin does not call the onchange function when
it creates a mailing list. this makes perfect sense- qmailadmin was
never patched to make it call this function, IF it was even available.
his work-around was to trigger his qmail-updater service via cron
job every five minutes. that seemed rather ugly to me, so i looked
into what it would take to make qmailadmin call the onchange script
whenever a mailing list was added (or deleted.)
it turned out that adding the necessary code was a twenty-minute
exercise, most of which involved finding the correct places to add
the code, and then realizing that i needed to include
vpopmail_config.h so that the compiler would know whether or not to
include the onchange code in the executable.
so i'm submitting the patch to the qmailadmin developers (rick i
believe) so that it can be added to a future version of qmailadmin.
and in the meantime, anybody who wants to try it is free to download
it. it's about halfway down on this page:
http://qmail.jms1.net/patches/vpopmail.shtml
the page has two versions- the 1.2.9 version applies cleanly to the
1.2.10 code, while the 1.2.11 version is actually running on my own
server, and has been tested- it does call the onchange script after
adding and before removing a mailing list.
the one thing i noticed is that four error messages show up because
the same constants exist in vpopmail's vpopmail_config.h and
qmailadmin's config.h, however this appears to me to be a non-issue
because the qmailadmin file is included AFTER the vpopmail file.
| John M. Simpson--- KG4ZOW ---Programmer At Large |
| http://www.jms1.net/ [EMAIL PROTECTED] |
| http://video.google.com/videoplay?docid=-4312730277175242198 |
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