#!/bin/sh
# update-exim4.conf(8) - Generate /var/lib/exim4/config.autogenerated
set -e
set -C
set -f
UPEX4C_confdir="/etc/exim4"
UPEX4C_sections="main acl router transport retry rewrite auth"
# list of ue4cc options that need to support both colons and
# semicolons as separators. dc_other_hostnames and dc_smarthost
# has special handling.
UPEX4C_semicolon="dc_local_interfaces dc_relay_nets dc_relay_domains"
EXIM="/usr/sbin/exim4"
UPEX4C_verbose=no
UPEX4C_autoconfigfile=/var/lib/exim4/config.autogenerated
UPEX4C_outputfile="${UPEX4C_autoconfigfile}"
UPEX4C_version="4.94.2-7+deb11u4"
usage() {
cat <<EOF
$0 - Generate exim4 configuration files
Options:
-v|--verbose - Enable verbose mode, tell about ignored files
-h|--help - Show this message
--keepcomments - Do not remove comment lines
--removecomments - Remove comment lines
-o|--output file - write output to file instead of ${UPEX4C_outputfile}
-d|--confdir directory - read input from given directory instead of ${UPEX4C_confdir}
--check - Test generated file for validity and remove it again.
EOF
}
## Parse commandline
TEMP=$(getopt -n update-exim4.conf \
-l check,keepcomments,removecomments,output:,confdir:,help,verbose -- \
+o:d:vh "$@")
if test "$?" != 0; then
echo "Terminating..." >&2
exit 1
fi
eval set -- ${TEMP}
while test "$1" != "--"; do
case $1 in
-h|--help)
usage
exit 0
;;
-v|--verbose)
UPEX4C_verbose=yes
;;
--keepcomments)
UPEX4C_comments=yes
;;
--removecomments)
UPEX4C_comments=no
;;
--check)
UPEX4C_check=yes
;;
-o|--output)
shift
UPEX4C_outputfile="$1"
;;
-d|--confdir)
shift
UPEX4C_confdir="$1"
;;
esac
shift
done
shift
# No non-option arguments allowed.
if [ "$#" -ne 0 ]; then
echo "No non option arguments ($@) allowed" >&2
usage >&2
exit 1
fi
# exit immediately if /etc/exim4/exim4.conf exists and -o was not specified
if [ -e /etc/exim4/exim4.conf ] && \
[ "${UPEX4C_outputfile}" = "${UPEX4C_autoconfigfile}" ] ; then
exit 0
fi
UE4CC="$UPEX4C_confdir/update-exim4.conf.conf"
UPEX4C_confd="$UPEX4C_confdir/conf.d"
[ -d "$(dirname "$UPEX4C_outputfile")" ] || \
{ printf "$0: Error, missing $(dirname "$UPEX4C_outputfile"), exiting.\n" 1>&2 ; exit 1 ; }
if [ -f "$UE4CC" ]; then
. "$UE4CC"
else
echo >&2 "$0: Error, no $UE4CC, exiting."
exit 1
fi
UPEX4C_autoconfigfile=/var/lib/exim4/config.autogenerated
if [ "$(dirname ${UPEX4C_outputfile})" = "/var/lib/exim4" ] ; then
UPEX4C_tmp="${UPEX4C_outputfile}.tmp"
else
UPEX4C_tmp="$(mktemp)"
fi
lowerpipe() {
tr 'A-Z' 'a-z'
}
lowercase() {
echo "$*" | lowerpipe
}
check_ascii_pipe() {
IN="$(cat)"
# Use "abcdef... instead of a a-z or [:alnum:] here since the alternatives
# will also match non-ascii characters.
OUT="$(echo $IN | sed 's/[^-0-9ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\/\.!*@_~:;< \[\]]/_/g')"
if [ "$OUT" != "$IN" ]; then
echo >&2 "$0: non-ascii value $IN read from $UE4CC, sanitizing to $OUT"
fi
echo $OUT
}
[ "${CFILEMODE}" = "" ] && CFILEMODE=644
[ "${dc_use_split_config}" = "" ] && dc_use_split_config='false'
[ "${dc_localdelivery}" = "" ] && dc_localdelivery='mail_spool'
[ "${UPEX4C_comments:-}" = "" ] && UPEX4C_comments="${ue4c_keepcomments:-no}"
TEMPLATEFILE="${UPEX4C_confdir}/exim4.conf.template"
dc_use_split_config="$(lowercase $dc_use_split_config)"
UPEX4C_verbose="$(lowercase $UPEX4C_verbose)"
if [ "${dc_use_split_config}" = "true" ]; then
[ "${UPEX4C_verbose}" = "yes" ] && \
echo "using split configuration scheme from ${UPEX4C_confd}"
if ! [ -d "${UPEX4C_confd}" ]; then
printf >&2 "$0: Error, no ${UPEX4C_confd}, exiting.\n"
exit 1
fi
else
[ "${UPEX4C_verbose}" = "yes" ] && \
echo "using non-split configuration scheme from ${TEMPLATEFILE}"
fi
# take only the first word from /etc/mailname
mailname="$(< /etc/mailname sed -n 's/\([-[:alnum:]@\.]\+\).*/\1/;p;q' | lowerpipe | check_ascii_pipe)"
# barf if lookups are found. They have never been supported here.
if echo " ${dc_other_hostnames} ${dc_smarthost} ${dc_local_interfaces} ${dc_relay_nets} ${dc_relay_domains}"| grep -q '[[:space:]]\(partial-\)\?\(cdb\|dbm\|dbmnz\|\(d\|ipl\|\(n\?wild\)\?l\)search\|nis\)\([\*@]\)\?[[:space:]]*;'; then
echo >&2 "WARNING: using 'lookup;' constructs in $UE4CC has never been supported! See /usr/share/doc/exim4-config/NEWS.Debian.gz for details."
fi
dc_other_hostnames="$(lowercase $dc_other_hostnames | check_ascii_pipe)"
# add localhost, get rid of spaces, trailing (semi)colons and make the list
# colon separated
local_domains="$(echo @:localhost:"${dc_other_hostnames}" | \
sed -e 's/[;: ]*$//' -e 's/ *//' -e 's/;/:/g')"
# run-parts emulation, stolen from Branden's /etc/X11/Xsession
# Addition: Use file.rul instead if file if it exists.
run_parts () {
# reset LC_COLLATE
unset LANG LC_COLLATE LC_ALL
if [ -z "$1" ]; then
errormessage "$0: internal run_parts called without an argument"
fi
if [ ! -d "$1" ]; then
errormessage "$0: internal run_parts called, but $1 does not exist or is not a directory."
fi
for F in $(ls $1); do
if expr "$F" : '[[:alnum:]_-]\+$' > /dev/null 2>&1; then
if [ -f "$1/$F" ] ; then
if [ -f "$1/${F}.rul" ] ; then
echo "$1/${F}.rul"
else
echo "$1/$F"
fi
fi
else
if [ "${UPEX4C_verbose}" = "yes" ] && \
[ -f "$1/$F" ] && \
! expr "$F" : '[[:alnum:]_-]\+\.rul'> /dev/null 2>&1 ; then
echo \
"internal run-parts: ignoring file: $1/$F" 1>&2
fi
fi
done;
}
# also from Branden
errormessage () {
# pretty-print messages of arbitrary length (no trailing newline)
echo "$*" | fold -s -w ${COLUMNS:-80} >&2;
}
cat_parts() {
if [ -z "$1" ]; then
errormessage "$0: internal cat_parts called without an argument"
fi
if [ ! -d "$1" ]; then
errormessage "$0: internal cat_parts called, but $1 does not exist or is not a directory."
fi
for file in $(run_parts $1); do
echo "#####################################################"
echo "### $file"
echo "#####################################################"
cat "$file"
echo
echo "#####################################################"
echo "### end $file"
echo "#####################################################"
done
}
gentmpconf() {
rm -f "${UPEX4C_tmp}"
touch "${UPEX4C_tmp}"
# this can be removed by the end of 2007
#chown --reference=${TEMPLATEFILE} \
# ${UPEX4C_tmp} ${UPEX4C_outputfile}
#chmod --reference=${TEMPLATEFILE} \
# ${UPEX4C_tmp} ${UPEX4C_outputfile}
if [ "$(id -u)" = "0" ]; then
chown root:Debian-exim "${UPEX4C_tmp}"
[ -e "${UPEX4C_outputfile}" ] && \
chown root:Debian-exim "${UPEX4C_outputfile}"
fi
chmod 640 "${UPEX4C_tmp}"
if [ -e "${UPEX4C_outputfile}" ]; then
chmod 640 "${UPEX4C_outputfile}"
fi
}
removecomments(){
if [ "${UPEX4C_comments}" = "no" ] ; then
grep -E -v '^[[:space:]]*#' | sed -e '/^$/N;/\n$/D' ;
else
cat
fi
}
gentmpconf
cat << EOF >> "${UPEX4C_tmp}"
#########
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# This file was generated dynamically from
EOF
if [ "${dc_use_split_config}" = "true" ] ; then
cat << EOF >> "${UPEX4C_tmp}"
# split config files in the $UPEX4C_confd/ directory.
EOF
else
cat << EOF >> "${UPEX4C_tmp}"
# non-split config ($UPEX4C_confdir/exim4.conf.localmacros
# and $UPEX4C_confdir/exim4.conf.template).
EOF
fi
cat << EOF >> "${UPEX4C_tmp}"
# The config files are supplemented with package installation/configuration
# settings managed by debconf. This data is stored in
# $UPEX4C_confdir/update-exim4.conf.conf
# Any changes you make here will be lost.
# See /usr/share/doc/exim4-base/README.Debian.gz and update-exim4.conf(8)
# for instructions of customization.
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
# WARNING WARNING WARNING
#########
EOF
# handle ";" in input values as separator change
for field in $UPEX4C_semicolon; do
if eval echo \$$field | grep -q ";"; then
eval temp=\$$field
if ! echo $temp | grep -q "^<"; then
temp="<; $temp"
eval "$field='$temp'"
fi
fi
done
# fix up smarthost line: change semicolons into single colons
dc_smarthost="$(lowercase $dc_smarthost | check_ascii_pipe | sed 's/;/:/g')"
dc_relay_nets="$(lowercase $dc_relay_nets | check_ascii_pipe)"
if echo "$dc_relay_nets" | grep -q '^<;'; then
dc_relay_nets="$dc_relay_nets ; 127.0.0.1 ; ::1"
else
dc_relay_nets="$dc_relay_nets : 127.0.0.1 : ::::1"
fi
dc_eximconfig_configtype="$(lowercase $dc_eximconfig_configtype | check_ascii_pipe)"
dc_hide_mailname="$(lowercase $dc_hide_mailname | check_ascii_pipe)"
dc_readhost="$(lowercase $dc_readhost | check_ascii_pipe)"
case "$dc_eximconfig_configtype" in
satellite|smarthost)
if [ "${dc_hide_mailname}" = "true" ] && [ -n "${dc_readhost}" ] ; then
hide_mailname=1
fi
;;
local)
;;
internet)
;;
none|*)
if [ "${dc_use_split_config}" = "true" ] ; then
for i in ${UPEX4C_sections} ; do
cat_parts "${UPEX4C_confd}/$i"
done | \
removecomments \
>> "${UPEX4C_tmp}"
else
LOCALMACROS=""
if [ -e "/etc/exim4/exim4.conf.localmacros" ]; then
LOCALMACROS="/etc/exim4/exim4.conf.localmacros"
fi
cat "${LOCALMACROS:-/dev/null}" "${TEMPLATEFILE:-/dev/null}" | \
removecomments \
>> "${UPEX4C_tmp}"
fi
mv -f "${UPEX4C_tmp}" "${UPEX4C_outputfile}"
chmod "${CFILEMODE}" "${UPEX4C_outputfile}"
[ "${UPEX4C_verbose}" = "yes" ] && \
echo "Not substituting variables since conftype is none (or other)"
exit 0
;;
esac
UPEX4C_macros="##############################################\n"
UPEX4C_macros="${UPEX4C_macros}# the following macro definitions were created\n"
UPEX4C_macros="${UPEX4C_macros}# dynamically by $0\n"
preprocess_macro() {
macroname="${1:-}"
shift
contents="$(lowercase ${@} | check_ascii_pipe)"
printf "%s" ".ifndef $macroname\n$macroname=$contents\n.endif\n"
}
seed_macro() {
UPEX4C_macros="${UPEX4C_macros}$(preprocess_macro "$1" "$2")"
}
file2macros() {
file="$1"
< $1 \
sed -n '/^[[:upper:]]/p;' | \
grep -v '^CFILEMODE=' | \
while read line; do
errormessage "undocumented line $line found in $1, generating exim macro"
left="$(echo $line | sed 's/\([^=]*\).*/\1/')"
right="$(echo $line | sed 's/[^=]*=\(.*\)/\1/')"
preprocess_macro "$left" "$right"
done
}
if [ "${dc_local_interfaces}" != "" ] ; then
seed_macro "MAIN_LOCAL_INTERFACES" "${dc_local_interfaces}"
fi
if [ "${dc_minimaldns}" = "true" ] ; then
seed_macro "DC_minimaldns" "1"
if guessed_name="$(hostname --fqdn | lowerpipe | check_ascii_pipe | grep '\.')" ; then
seed_macro "MAIN_HARDCODE_PRIMARY_HOSTNAME" "$guessed_name"
else
errormessage "hostname --fqdn did not return a fully qualified name, dc_minimaldns will not work. Please fix your /etc/hosts setup."
fi
fi
if [ -n "${hide_mailname:-}" ]; then
seed_macro "HIDE_MAILNAME" "${hide_mailname:-}"
fi
seed_macro "MAIN_PACKAGE_VERSION" "$UPEX4C_version"
seed_macro "MAIN_LOCAL_DOMAINS" "${local_domains}"
seed_macro "MAIN_RELAY_TO_DOMAINS" "${dc_relay_domains}"
seed_macro "ETC_MAILNAME" "$mailname"
seed_macro "LOCAL_DELIVERY" "${dc_localdelivery}"
seed_macro "MAIN_RELAY_NETS" "${dc_relay_nets}"
seed_macro "DCreadhost" "${dc_readhost}"
seed_macro "DCsmarthost" "${dc_smarthost}"
seed_macro "DC_eximconfig_configtype" "${dc_eximconfig_configtype}"
seed_macro "DCconfig_${dc_eximconfig_configtype}" "1"
# dump everything starting with a capital into macros as well
# this is going to stay undocumented, but fixes PEBCAK where people write
# macros into ue4cc.
UPEX4C_macros="${UPEX4C_macros}$(file2macros $UE4CC)"
UPEX4C_macros="${UPEX4C_macros}##############################################\n"
case "${dc_use_split_config}" in
true)
for i in ${UPEX4C_sections} ; do
echo "# begin processing $i #####"
cat_parts "${UPEX4C_confd}/$i"
echo "# end of $i #####"
done \
| removecomments \
| sed "s|^\(UPEX4CmacrosUPEX4C.*\)$|\1\n$UPEX4C_macros|" \
>> "${UPEX4C_tmp}"
RELEVANTTEMPLATE="$UPEX4C_confd"
;;
false)
if [ ! -r "$TEMPLATEFILE" ] ; then
echo "Error: Unsplit config selected and $TEMPLATEFILE missing ... exiting" 1>&2
exit 1
fi
LOCALMACROS=""
if [ -e "/etc/exim4/exim4.conf.localmacros" ]; then
LOCALMACROS="${UPEX4C_confdir}/exim4.conf.localmacros"
fi
cat "${LOCALMACROS:-/dev/null}" "${TEMPLATEFILE:-/dev/null}" \
| removecomments \
| sed "s|^\(UPEX4CmacrosUPEX4C.*\)$|\1\n$UPEX4C_macros|" \
>> "${UPEX4C_tmp}"
RELEVANTTEMPLATE="$TEMPLATEFILE"
;;
*)
errormessage "Invalid value for dc_use_split_config: \"${dc_use_split_config}\", exiting."
rm -f "${UPEX4C_tmp}"
exit 1
;;
esac
# check for left-over DEBCONF strings that may cause installation trouble
# (fix PEBCAK for people who don't accept conffile changes and don't
# read docs)
if grep -qr '^[^#]*DEBCONF[[:lower:]_]\+DEBCONF' $RELEVANTTEMPLATE \
&& ! grep -qr '^[[:space:]]*DEBCONFstringOK_config_adapted[[:space:]]*=' $RELEVANTTEMPLATE; then
errormessage "DEBCONFsomethingDEBCONF found in exim configuration. This is most probably caused by you upgrading to exim4 4.67-3 or later without accepting the suggested conffile changes. Please read /usr/share/doc/exim4-config/NEWS.Debian.gz for 4.67-2 and 4.67-4"
fi
# check for left-over UPEX4CmacrosUPEX4C comment string that may cause
# installation trouble (fix PEBCAK for people who don't accept conffile
# changes and don't read docs)
if grep -qr '# UPEX4CmacrosUPEX4C' $RELEVANTTEMPLATE \
&& ! grep -qr '^[[:space:]]*UPEX4CmacrosOK_config_adapted[[:space:]]*=' $RELEVANTTEMPLATE; then
errormessage "UPEX4CmacrosUPEX4C found in an exim configuration comment. This is most probably caused by you upgrading to exim4 4.67-5 or later without accepting the suggested conffile changes. Please read /usr/share/doc/exim4-config/NEWS.Debian.gz for 4.67-5"
fi
# test validity if called without -o or if --check was supplied
if [ "${UPEX4C_outputfile}" = "${UPEX4C_autoconfigfile}" ] || \
[ "x${UPEX4C_check}" = "xyes" ]; then
if [ -x "${EXIM}" ] ; then
if ! "${EXIM}" -C "${UPEX4C_tmp}" -bV > /dev/null ; then
# we have an error in the configuration file. Do not install
# and activate. However, errors in string expansions inside
# the configuration file are not detected by this check!
errormessage "Invalid new configfile ${UPEX4C_tmp}, not installing ${UPEX4C_tmp} to ${UPEX4C_outputfile}"
exit 1
fi
fi
fi
if [ "x${UPEX4C_check}" = "xyes" ]; then
rm -f "${UPEX4C_tmp}"
exit 0
fi
mv -f "${UPEX4C_tmp}" "${UPEX4C_outputfile}"
chmod "${CFILEMODE}" "${UPEX4C_outputfile}"
# end of file