[type/__dma] Implement config file updates
This commit is contained in:
Dennis Camera
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b87b67597e
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4dfa24723a
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@ -0,0 +1,30 @@
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#!/bin/sh -e
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#
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# 2020 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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# This explorer looks for lines matching the server parameter in dma's auth.conf
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# and reports the login and server fields (password is cksummed)
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CONF_PATH=/etc/dma # set in Makefile
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dma_conf="${CONF_PATH:?}/dma.conf"
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test -f "${dma_conf}" || exit 0
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grep -v -e '^[ \t]*#\|^$' "${dma_conf}" \
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| sed -e 's/[ \t]*#.*$//' \
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| sort -s -k 1,1
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@ -1,5 +1,200 @@
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#!/bin/sh -e
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CONF_PATH=/etc/dma # set in Makefile
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# Generate config
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conf_should=$(
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if test -s "${__object}/parameter/smart-host"
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then
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printf 'SMARTHOST %s\n' "$(cat "${__object}/parameter/smart-host")"
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#printf 'AUTHPATH %s\n' "$(cat "${__type}/
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fi
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case $(cat "${__object}/parameter/security")
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in
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(ssl|tls)
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default_smtp_port=465
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echo 'SECURETRANSFER'
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;;
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(starttls)
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default_smtp_port=587
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echo 'SECURETRANSFER'
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echo 'STARTTLS'
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;;
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(opportunistic)
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default_smtp_port=25 # XXX: correct?
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echo 'SECURETRANSFER'
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echo 'STARTTLS'
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echo 'OPPORTUNISTIC_TLS'
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;;
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(insecure)
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default_smtp_port=25
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echo 'INSECURE'
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;;
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esac
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if test -s "${__object}/parameter/port"
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then
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printf 'PORT %u\n' "$(cat "${__object}/parameter/port")"
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elif test "${default_smtp_port}" -ne 25
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then
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printf 'PORT %u\n' "${default_smtp_port}"
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fi
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if test -f "${__object}/parameter/masquerade"
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then
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while read -r line
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do
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printf 'MASQUERADE %s\n' "${line}"
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done <"${__object}/parameter/masquerade"
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fi
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)
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conf_should=$(echo "$conf_should" | sort -s -k 1,1)
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config_updated=false
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if ! echo "$conf_should" | cmp -s "${__object}/explorer/conf" -
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then
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# config needs to be updated
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echo "dma_conf='${CONF_PATH:?}/dma.conf'"
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cat <<'EOF'
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awk -F '\n' '
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function comment_line(line) { return match(line, /^[ \t]*#+[ \t]*/) }
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function empty_line(line) { return match(line, /^[ \t]*$/) }
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function is_word(s) { return s ~ /^[A-Z_]+$/ }
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function first(line, sep) {
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if (!sep) sep = SUBSEP
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return index(line, sep) ? substr(line, 0, index(line, sep)) : line
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}
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function rest(line, sep) {
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if (!sep) sep = SUBSEP
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if (index(line, sep))
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return substr(line, index(line, sep) + 1)
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}
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function conf_pop(word, value) {
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if (!(word in conf)) return 0
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if (!value) {
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if (index(conf[word], SUBSEP)) # more than one element?
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value = substr(conf[word], 0, index(conf[word], SUBSEP))
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else
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value = conf[word]
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}
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if (index(conf[word], SUBSEP)) {
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if (index(conf[word], value SUBSEP) != 1) return 0
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conf[word] = substr(conf[word], length(value) + 2)
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} else {
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if (conf[word] != value) return 0
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delete conf[word]
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}
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return value
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}
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function print_conf(word, value) {
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printf "%s", word
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if (value) printf " %s", value
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printf "\n"
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}
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function print_confs(word, value) {
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if (!(word in conf)) return
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if (conf[word]) {
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while (value = conf_pop(word))
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print_conf(word, value)
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} else {
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print_conf(word)
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delete conf[word]
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}
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}
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BEGIN {
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while (getline < "/dev/stdin") {
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word = first($0, " ")
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if ((word in conf))
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conf[word] = conf[word] SUBSEP rest($0, " ")
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else
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conf[word] = rest($0, " ")
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}
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}
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# first pass, gather information
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NR == FNR {
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if (comment_line($0)) {
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# comment line
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word = first(substr($0, RLENGTH + 1), " ")
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if (is_word(word)) last_occ["#" word] = FNR
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} else {
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word = first($0, " ")
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if (is_word(word)) last_occ[word] = FNR
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}
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}
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NR > FNR && FNR == 1 {
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# before second pass prepare hashes
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for (k in last_occ)
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if (k ~ /^\#/ && (substr(k, 2) in last_occ))
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delete last_occ[k]
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for (k in last_occ) {
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line_map[last_occ[k]] = k
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}
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}
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# second pass, output new config
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NR > FNR {
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if (comment_line($0) || empty_line($0)) {
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# comment or empty line
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print
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if ((FNR in line_map)) {
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if (line_map[FNR] ~ /^\#/) {
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# the "matching" comment line is here
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k = substr(line_map[FNR], 2)
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if ((k in conf)) print_confs(k)
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}
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if (("INSECURE" in conf) && line_map[FNR] ~ /^\#?SECURE$/) {
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# INSECURE goes where SECURE comment is
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print_confs("INSECURE")
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}
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}
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} else {
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sub(/[ \t]*\#.*$/, "", $0) # ignore comments
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word = first($0, " ")
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if ((word in conf) && rest($0, " ") == first(conf[word])) {
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# keep config options we want
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conf_pop(word)
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print
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}
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if ((FNR in line_map) && line_map[FNR] == word) {
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# rest of config options should be here
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print_confs(word)
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}
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}
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}
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END {
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# print rest of config options
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for (word in conf) print_confs(word)
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}
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' "${dma_conf}" "${dma_conf}" <<'EOF' >"${dma_conf}.tmp" \
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&& mv "${dma_conf}.tmp" "${dma_conf}"
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EOF
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echo "${conf_should}"
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echo 'EOF'
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config_updated=true
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echo 'config updated' >>"${__messages_out}"
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fi
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if test -f "${__object}/parameter/send-test-email"
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then
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modified=false
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@ -10,7 +205,7 @@ then
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elif grep -q '^__dma_auth/' "${__messages_in}"
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then
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modified=true
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elif grep -q '^__dma/' "${__messages_in}"
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elif $config_updated
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then
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modified=true
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fi
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@ -39,7 +39,31 @@ mailname
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If not defined, it defaults to `/etc/mailname` on Debian-derived Operating
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Systems and to `__target_host` otherwise.
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See `dma(8)` for more information.
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masquerade
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Masquerade the envelope-from addresses with this address/hostname.
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Use this setting if mails are not accepted by destination mail servers
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because your sender domain is invalid.
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This option can be used multiple times.
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For more information see the `dma(8)` man page.
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port
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The port on which to deliver email.
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If not provided, a sensible default port will be used based on the
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`--security` argument.
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security
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Configures whether and how DMA should use secure connections.
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ssl/tls
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Enable TLS/SSL secured transfer.
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starttls
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Use STARTTLS to establish a secure connection.
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opportunistic (default)
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Will try to establish a secure connection using STARTTLS, but allow
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unencrypted transfer if STARTTLS fails.
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Most useful when dma is used without a smarthost, delivering remote
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messages directly to the outside mail exchangers.
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insecure
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allow plain text SMTP login over an insecure connection.
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Should really not be used anymore!
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EXAMPLES
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--------
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@ -2,54 +2,57 @@
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os=$(cat "${__global}/explorer/os")
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smart_host="$(cat "${__object}/parameter/smart-host")"
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if [ -f "${__object}/parameter/mailname" ]; then
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mailname="$(cat "${__object}/parameter/mailname")"
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# mailname: default behaviour is different on certain systems
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if test -f "${__object}/parameter/mailname"
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then
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mailname=$(cat "${__object}/parameter/mailname")
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else
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# default mailname behaviour is different in certain systems
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case ${os} in
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debian|devuan|ubuntu)
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# Debian-like default to /etc/mailname
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mailname="/etc/mailname"
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;;
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*)
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# Otherwise let's use the hostname
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mailname="${__target_host}"
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;;
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esac
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# Otherwise use the hostname
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mailname=$(cat "${__global}/explorer/hostname")
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fi
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case ${os} in
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debian|devuan|ubuntu)
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# Debian-like requires installing DMA
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__package dma
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# Moving forward without DMA doesn't make much sense
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export require="__package/dma"
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;;
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freebsd)
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# Disable sendmail + stop if necessary
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__key_value \
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--file "/etc/rc.conf" \
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--comment "# Disable sendmail " \
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--key "sendmail_enable" \
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--delimiter "=" \
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--value "NONE" \
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--onchange "service sendmail onestop || true" \
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"sendmail_enable"
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case $os
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in
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(debian|devuan|ubuntu)
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# On Debian-like systems use /etc/mailname
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if test -f "${__object}/parameter/mailname"
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then
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echo "$mailname" | __file '/etc/mailname' --state present \
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--mode 0644 --owner root --group root --source -
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fi
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mailname='/etc/mailname'
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;;
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esac
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# Install DMA
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case $os
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in
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(debian|devuan|ubuntu)
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__package dma --state present
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export require='__package/dma'
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;;
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(freebsd)
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# Stop sendmail if necessary
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__process 'sendmail' --name 'sendmail.*' --state absent \
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--stop '/etc/rc.d/sendmail onestop'
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# ... and disable it
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__key_value 'rcconf-sendmail-enable' --file '/etc/rc.conf' \
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--key 'sendmail_enable' --delimiter '=' --value '"NONE"' \
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--exact_delimiter
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# Setup mailwrapper accordingly
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__file /etc/mail/mailer.conf \
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--mode 0644 \
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--source '-' <<EOF
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sendmail /usr/libexec/dma
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send-mail /usr/libexec/dma
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mailq /usr/libexec/dma
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newaliases /usr/libexec/dma
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rmail /usr/libexec/dma
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EOF
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;;
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*)
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cat > /dev/stderr <<EOF
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__file '/etc/mail/mailer.conf' --mode 0644 --source - <<-'EOF'
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sendmail /usr/libexec/dma
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send-mail /usr/libexec/dma
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mailq /usr/libexec/dma
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newaliases /usr/libexec/dma
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rmail /usr/libexec/dma
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EOF
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;;
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(*)
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cat <<EOF >&2
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Your OS (${os}) is not supported yet.
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Maybe adding support is as simple as adapting the packages or allowing it,
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@ -57,77 +60,5 @@ we highly encourage you to open a PR with the necessary changes.
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See: https://code.ungleich.ch/ungleich-public/cdist-contrib/
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EOF
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exit 1
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;;
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;;
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esac
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DMA_CONF="$(cat <<EOF
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# Managed remotely, changes will be lost
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#
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# Your smarthost (also called relayhost). Leave blank if you don't want
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# smarthost support.
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SMARTHOST ${smart_host}
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# Use this SMTP port. Most users will be fine with the default (25)
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#PORT 25
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# Path to your alias file. Just stay with the default.
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#ALIASES /etc/aliases
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# Path to your spooldir. Just stay with the default.
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#SPOOLDIR /var/spool/dma
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# SMTP authentication
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#AUTHPATH /etc/dma/auth.conf
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# Uncomment if yout want TLS/SSL support
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SECURETRANSFER
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# Uncomment if you want STARTTLS support (only used in combination with
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# SECURETRANSFER)
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STARTTLS
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# Uncomment if you have specified STARTTLS above and it should be allowed
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# to fail ("opportunistic TLS", use an encrypted connection when available
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# but allow an unencrypted one to servers that do not support it)
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#OPPORTUNISTIC_TLS
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# Path to your local SSL certificate
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#CERTFILE
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# If you want to use plain text SMTP login without using encryption, change
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# the SECURE entry below to INSECURE. Otherwise plain login will only work
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# over a secure connection. Use this option with caution.
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#SECURE
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# Uncomment if you want to defer your mails. This is useful if you are
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# behind a dialup line. You have to submit your mails manually with dma -q
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#DEFER
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# Uncomment if you want the bounce message to include the complete original
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# message, not just the headers.
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#FULLBOUNCE
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# The internet hostname dma uses to identify the host.
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# If not set or empty, the result of gethostname(2) is used.
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# If MAILNAME is an absolute path to a file, the first line of this file
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# will be used as the hostname.
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MAILNAME ${mailname}
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# Masquerade envelope from addresses with this address/hostname.
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# Use this if mails are not accepted by destination mail servers because
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# your sender domain is invalid.
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# By default, MASQUERADE is not set.
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# Format: MASQUERADE [user@][host]
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# Examples:
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# MASQUERADE john@ on host "hamlet" will send all mails as john@hamlet
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# MASQUERADE percolator will send mails as \$username@percolator, e.g. fish@percolator
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# MASQUERADE herb@ert will send all mails as herb@ert
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# Directly forward the mail to the SMARTHOST bypassing aliases and local delivery
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#NULLCLIENT
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EOF
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)"
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__file /etc/dma/dma.conf --mode 0644 --source '-' <<EOF
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${DMA_CONF}
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EOF
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@ -0,0 +1 @@
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opportunistic
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@ -1 +1,3 @@
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mailname
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port
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security
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@ -0,0 +1 @@
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masquerade
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