On Wed, 20 Jul 2022, Andrew C Aitchison via Exim-users wrote:

On Wed, 20 Jul 2022, Thomas Krichel via Exim-users wrote:
root@darni /etc/exim4 # cat ./conf.d/transport/14_exim4-config_mailman
mailman_transport:
 driver  = pipe
 command = MM_WRAP \
         '${if def:local_part_suffix \
               {${sg{$local_part_suffix}{-(\\w+)(\\+.*)?}{\$1}}} \
               {post}}' \
         $local_part
 current_directory = MM_HOME
 home_directory    = MM_HOME
 user              = MM_UID
 group             = MM_GID

 just what the instruction say ... Here is my router

root@darni /etc/exim4 # cat ./conf.d/router/114_exim4-config_mailman | grep -v ^\#
mailman_router:
 driver            = accept
 domains           = +mm_domains
 require_files     = MM_LISTCHK
 local_part_suffix_optional
 local_part_suffix = -admin     : \
        -bounces   : -bounces+* : \
        -confirm   : -confirm+* : \
        -join      : -leave     : \
        -owner     : -request   : \
        -subscribe : -unsubscribe
 transport         = mailman_transport

 Here is my template, again with comments left out for brefty

root@darni /etc/exim4 # cat conf.d/main/template_14_exim4-config_mailman | grep -v ^\#
MM_HOME=/var/lib/mailman
MM_UID=list
MM_GID=list
domainlist mm_domains=lists.openlib.org
MM_WRAP=MM_HOME/mail/mailman
MM_LISTCHK=MM_HOME/lists/${lc::$local_part}/config.pck

 A manual check of MM_LISTCHK suggests that nep-techncians
 should be found since the config.pck is there.

root@darni ~ # ls /var/lib/mailman/lists/nep-technicians/config.pck
/var/lib/mailman/lists/nep-technicians/config.pck

 What more to check?

You have checked everything, but you need to use an untainted
value in command. Based on
 echo /var/lib/mailman/lists/nep-technicians/config.pck |\
     sed -e 's/\/config.pck\$//' -e 's/\/.*\///g'config.pck
(the order of the replacements matters)
could you try replacing your transport with:

mailman_transport:
 driver  = pipe
 command = MM_WRAP \
         '${if def:local_part_suffix \
               {${sg{$local_part_suffix}{-(\\w+)(\\+.*)?}{\$1}}} \
               {post}}' \
         ${sg{sg{$local_part}{\/config.pck$}{}}{.*\/}{}}
 current_directory = MM_HOME
 home_directory    = MM_HOME
 user              = MM_UID
 group             = MM_GID

?
I don't have an exim config system with MM_LISTCHK
and I have never tested the sg function in an exim config before,
so this is unlikely to be exactly right.

I was right that this was wrong :-(
Please try
    ${sg{sg{$}{\/config.pck$}{MM_LISTCHK}}{.*\/}{}}
instead.

--
Andrew C. Aitchison                      Kendal, UK
                   and...@aitchison.me.uk

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