dovecot - Dec 2022 - Iteration failure on passwd-file when listing all users?

> I'm trying to get a list of all dovecot users, on a simple test setup
on
> my local network (which "works", in that I can get IMAP mails
from dovecot):
> 
> passdb {
>    driver = passwd-file
>    args = /var/mail/vhosts/%d/shadow
> }
> userdb {
>    driver = passwd-file
>    args = /var/mail/vhosts/%d/passwd
> }
> 
> The command 'doveadm user -u foo at example.com' correctly shows
that user.
> However, any attempt to wildcard the user fails:
> 
> # doveadm user -u *@example.com
> Error: auth-master: userdb list: User listing returned failure
> Fatal: user listing failed
> 
> The log file shows
> 
 quotes? shell expands *

I did try that, but it makes no difference - note the error message in 
the Dovecot log file, which actually shows the '*' verbatim (or the
'?',
if you use that), so the special character actually goes through to 
doveadm (I'm not sure how!)

On 31/12/2022 17:10, Marc wrote:
>> I'm trying to get a list of all dovecot users, on a simple test
setup on
>> my local network (which "works", in that I can get IMAP mails
from dovecot):
>>
>> passdb {
>>     driver = passwd-file
>>     args = /var/mail/vhosts/%d/shadow
>> }
>> userdb {
>>     driver = passwd-file
>>     args = /var/mail/vhosts/%d/passwd
>> }
>>
>> The command 'doveadm user -ufoo at example.com' correctly shows
that user.
>> However, any attempt to wildcard the user fails:
>>
>> # doveadm user -u *@example.com
>> Error: auth-master: userdb list: User listing returned failure
>> Fatal: user listing failed
>>
>> The log file shows
>>
>   quotes? shell expands *
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