Section: Maintenance Commands (8)
Updated: Jun 25, 2005
update-exim4.conf - Generate exim4 configuration files.
update-exim4.conf [-v|--verbose] [-h|--help] [--keepcomments] [--removecomments] [-o|--output file]
The script update-exim4.conf generates the main configuration files /var/lib/exim4/config.autogenerated for Exim v4 by merging the data in the template file /etc/exim4/exim4.conf.template or the ones in the /etc/exim4/conf.d directory tree respectively and /etc/exim4/update-exim4.conf.conf to the output file /var/lib/exim4/config.autogenerated.
If dc_use_split_config in /etc/exim4/update-exim4.conf.conf specifies a split configuration, update-exim4.conf processes the /etc/exim4/conf.d subdirectories in the order main, acl, router, transport, retry, rewrite and auth. Within each directory it takes files in lexical sort order by file name. It concatenates all these files and makes the debconf replacement described below.
If you are not using split configuration update-exim4.conf concatenates /etc/exim4/exim4.conf.localmacros (if this file exists) and /etc/exim4/exim4.conf.template (in this order) and makes the debconf replacement described below.
In either case, before outputting the result to /var/lib/exim4/config.autogenerated, update-exim4.conf generates a number of exim configuration macros from the contents of dc_something from /etc/exim4/update-exim4.conf.conf and inserts them into the configuration right after the definition of the exim configuration macro UPEX4CmacrosUPEX4C (which is only used as placeholder for this case). The macro definitions are bracketed with .ifdef clauses to allow the local admin to override the values with earlier definitions. update-exim4.conf makes no other changes to the configuration. This makes it very simple to make small changes to the configuration and still have the benefits of debconf.
On the other hand if you don't want to manage exim4.conf with debconf install your own handcrafted version as /etc/exim4/exim4.conf. Exim will use this file if it exists and ignore the autogenerated one. Additionally you might want to set dc_eximconfig_configtype=none in /etc/exim4/update-exim4.conf.conf to stop debconf from asking you questions about exim4.
update-exim4.conf exits silently and does nothing if /etc/exim4/exim4.conf exists and -o was not used to direct the output to a different file than /var/lib/exim4/config.autogenerated.
update-exim4.conf will only use files in the conf.d directory that have a filename which consists only of letters, numbers, underscores and hyphens ([:alnum:]_-), similar to run-parts?(8). Additionally, update-exim4.conf will use /etc/exim4/conf.d/foo/bar.rul instead of /etc/exim4/conf.d/foo/bar if the .rul file exists. This is meant to be helpful for easy interaction with packages extending Exim.
If the new configuration will be written to /var/lib/exim4/config.autogenerated, update-exim4.conf will check the validity of the freshly generated configuration. If the new file is detected as invalid, update-exim4.conf leaves the old /var/lib/exim4/config.autogenerated untouched and exits with an error.
However, there are still possible invalidities that can only be detected at run time. This most notably applies to errors in expressions that are expanded at run time.
If the new configuration will be written to some other file, no validity checking occurs and that file will always be overwritten.
You want to be able to check exim's queue as normal user: Generate a new file, e.g. /etc/exim4/conf.d/main/40_local_mailq, containing only the line queue_list_requires_admin = false
update-exim4.conf changes the file permissions of the output file to the value of the environment variable CFILEMODE. If CFILEMODE is neither set in /etc/exim4/update-exim4.conf.conf nor in the environment it defaults to 0644. Change this to 0640 if you are keeping sensitive information (LDAP credentials et. al.) in there.
All lists given in configuration variables are semicolon-separated. In the past, they used to be colon separated. This was changed to semicolon separation to make specification of IPv6 addresses easier. Backwards compatibility is preserved, so that old configurations using colons as separators do still work. Colons are deprecated and might stop working in a later release. If you need to specifiy a single IPv6 address in a field that is defined as a list of host names or IP addresses, please prefix "<;" to explicitly specify the list separator as a semicolon. Otherwise, the code cannot tell an IP address from a colon-separated list of strange host names.
Using lookups like "dsearch;something" in update-exim4.conf.conf has never been supported and does no longer work! If you need this, please convert to directly setting the appropriate macros.
update-exim4.conf evaluates these patterns in /etc/exim4/update-exim4.conf.conf:
host.domain.example deliver to host looked up on DNS, tcp/25
host.domain.example::587 deliver to host looked up on DNS, tcp/587
192.168.2.4 deliver to IPv4 host, tcp/25
192.168.2.4::587 deliver to IPv4 host, tcp/587
[192.168.2.4]::587 deliver to IPv4 host, tcp/587
2001::0db8::f::4::::2 deliver to IPv6 host, tcp/25
[2001::0db8::f::4::::2]::587 deliver to IPv6 host, tcp/587
This is used as value of the DCsmarthost macro.:
If you are running exim as daemon (as it is in the default setup of the Debian packages) you should not invoke update-exim4.conf directly when exim is running. For SMTP receiving or queue running, exim forks, and the new processes would use the new configuration file, while the original main exim daemon would still use the old configuration file. You should use invoke-rc.d exim4 restart instead.
This manual page needs a major re-work. If somebody knows better groff than us and has more experience in writing manual pages, any patches would be greatly appreciated.
Andreas Metzler <ametzler at downhill.at.eu.org>
Marc Haber <email@example.com>
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