From: Felix Dietrich <felix.dietrich@sperrhaken.name>
To: help-gnu-emacs@gnu.org
Subject: Re: How I am handling msmtp queues
Date: Fri, 11 Mar 2022 15:55:48 +0100 [thread overview]
Message-ID: <87ilskedxn.fsf@sperrhaken.name> (raw)
In-Reply-To: <YipIsFrhdDkyzXb+@protected.localdomain> (Jean Louis's message of "Thu, 10 Mar 2022 21:51:28 +0300")
Jean Louis <bugs@gnu.support> writes:
> * Felix Dietrich <felix.dietrich@sperrhaken.name> [2022-03-10 19:33]:
>> Jean Louis <bugs@gnu.support> writes:
>>> msmtp-runqueue.sh
>>> =================
>>>
>>> #!/usr/bin/env bash
>>>
>>> QUEUEDIR="$HOME/.msmtpqueue"
>>> LOCKFILE="$QUEUEDIR/.lock"
>>> MAXWAIT=120
>>>
>>> OPTIONS=$@
>>>
>>> # wait for a lock that another instance has set
>>> WAIT=0
>>> while [ -e "$LOCKFILE" -a "$WAIT" -lt "$MAXWAIT" ]; do
>>>
>>> # […]
>>>
>>> # lock the $QUEUEDIR
>>> touch "$LOCKFILE" || exit 1
>>>
>>> # […]
I think your lock file handling is not race free. There are lock file
helpers that you may find useful. On Debian, for example:
$ apt-file find bin/lockfile
lockfile-progs: /usr/bin/lockfile-check
lockfile-progs: /usr/bin/lockfile-create
lockfile-progs: /usr/bin/lockfile-remove
lockfile-progs: /usr/bin/lockfile-touch
procmail: /usr/bin/lockfile
>>> while [ -e "$LOCKFILE" -a "$WAIT" -lt "$MAXWAIT" ]; do
The general advice for the test commandʼs operators "-a" and "-o" is to
not use them (they have been marked obsolescent) but instead the shellʼs
operators "&&" and "||", respectively [1]:
while [ -e "$LOCKFILE" ] && [ "$WAIT" -lt "$MAXWAIT" ]; do
> OpenSMTPD is good of course. Though it does not handle queue as well
> as Courier MTA and has some problems, it is still in development. I
> have many emails, many people, so it gives me experience with it.
What issues did you encounter with OpenSMTPD?
Footnotes:
[1] See the note at the description for "-a" and "-o" as well as the
section “APPLICATION USAGE” in the following document:
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html
--
Felix Dietrich
next prev parent reply other threads:[~2022-03-11 14:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-10 6:23 How I am handling msmtp queues Jean Louis
2022-03-10 16:21 ` Felix Dietrich
2022-03-10 18:51 ` Jean Louis
2022-03-11 14:55 ` Felix Dietrich [this message]
2022-03-13 14:54 ` Jean Louis
2022-03-14 20:51 ` Tomas Hlavaty
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