Xavier Bestel wrote:
> Hi,
>
> I have a small install with cyrus-imapd 2.3.14, which reads some of its
> mails with fetchmail. To limit the delay in mail delivery, fetchmail
> awakes each minute to get mails.
> What I would like is let fetchmail do that only when there's a client
> actually reading its mails, i.e. an MUA actually connected to imapd.
>
> So, my question: how to hook a script each time a client
> connects/disconnects from imapd ?
>
Check /var/imap/proc for files. If any are present, then a client is connected. Write a
polling script to run out of cron that checks for this and runs fetchmail if appropriate.
I'll let other's comment on the soundness of this.
Semi-pseudo code.
#/bin/sh
if [ $(find /var/imap/proc -type f | wc -l) -gt 0 ]; then
fetchmail
fi
For bonus points, you could parse the proc files and only run fetch mail for the users
actually connected.
find /var/imap/proc -type f | \
xargs awk 'BEGIN{FS="\t"}{if (length($2)) print $2}' | \
sort -u | \
xargs <dispatch_command>
--
Russell A. Jackson <raj@xxxxxxxx>
Network Analyst
California State University, Bakersfield
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