How to loop queue checking code?

Question

Possible Duplicate:
Disconnect modem when postfix queue empty

This script code checks to see if the postfix mail queue empty and if true it disconnects my modem.

#!/bin/sh
postqueue -p|grep empty
if [ $? -eq 0 ]; then
  killall wvdial
fi

I need to run it many times as needed until the mail queue gets empty.

How can I loop it?

Maybe placing an else that returns to execute the script from the line of postqueue -p|grep empty ?

I know it can be simple but am not too much expert in bash scripting so I need help to complete this code.

score 5 · Accepted Answer · answered Nov 09 '11 at 19:53

5

#!/bin/bash
while ! postqueue -p | grep -q empty; do
    sleep 1
done
killall wvdial

answered Nov 09 '11 at 19:53

ata

wow!! just what i needed! it works like a charm! – nerdhacker Nov 09 '11 at 20:13

score 3 · Answer 2 · answered Nov 09 '11 at 19:44

3

Is this what you're looking for?

while postqueue -p | grep -q empty; do
    killall wvdial
    sleep 1
done

answered Nov 09 '11 at 19:44

Kevin

Yes Kevin, this seems to be very similar to the answer of Juaco, both of your codes fix my script, now it works perfectly as i want. thanks! – nerdhacker Nov 09 '11 at 20:15

score 2 · Answer 3 · edited Apr 13 '17 at 12:14

2

This code works even better (as it is faster on large queues):

while [ `find /var/spool/postfix/{deferred,active,maildrop}/ -type f | wc -l` -gt 0 ]; do
    sleep 5
done
killall wvdial

And note that this question is a duplicate of your own question.

edited Apr 13 '17 at 12:14

Community

answered Nov 09 '11 at 21:21

mailq

Yes, but you probably need more privileges to look in this folders (deferred,active,maildrop). But to speed the find up, you may use `-print -quit` to get only the first match `while [ \`find /var/spool/postfix/{deferred,active,maildrop}/ -type f -print -quit\` != "" ]` – Martin T. Nov 05 '20 at 09:02

3 Answers3