refactoring: split helper functions into smaller scripts (#2420)

target/scripts/wrapper/fail2ban-wrapper.sh

@@ -0,0 +1,31 @@
+#! /bin/bash
+
+# You cannot start fail2ban in some foreground mode and
+# it's more or less important that docker doesn't kill
+# fail2ban and its chilren if you stop the container.
+#
+# Use this script with supervisord and it will take
+# care about starting and stopping fail2ban correctly.
+#
+# supervisord config snippet for fail2ban-wrapper:
+#
+# [program:fail2ban]
+# process_name = fail2ban
+# command = /path/to/fail2ban-wrapper.sh
+# startsecs = 0
+# autorestart = false
+#
+
+trap "/usr/bin/fail2ban-client stop" SIGINT
+trap "/usr/bin/fail2ban-client stop" SIGTERM
+trap "/usr/bin/fail2ban-client reload" SIGHUP
+
+/usr/bin/fail2ban-client start
+sleep 5
+
+# wait until fail2ban is dead (triggered by trap)
+while kill -0 "$(< /var/run/fail2ban/fail2ban.pid)"
+do
+  sleep 5
+done
+

target/scripts/wrapper/postfix-wrapper.sh

@@ -0,0 +1,29 @@
+#! /bin/bash
+
+# You cannot start postfix in some foreground mode and
+# it's more or less important that docker doesn't kill
+# postfix and its chilren if you stop the container.
+#
+# Use this script with supervisord and it will take
+# care about starting and stopping postfix correctly.
+#
+# supervisord config snippet for postfix-wrapper:
+#
+# [program:postfix]
+# process_name = postfix
+# command = /path/to/postfix-wrapper.sh
+# startsecs = 0
+# autorestart = false
+#
+
+trap "service postfix stop" SIGINT
+trap "service postfix stop" SIGTERM
+trap "service postfix reload" SIGHUP
+
+service postfix start
+
+# wait until postfix is dead (triggered by trap)
+while kill -0 "$(< /var/spool/postfix/pid/master.pid)"
+do
+  sleep 5
+done

target/scripts/wrapper/postsrsd-wrapper.sh

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+#! /bin/bash
+
+# shellcheck source=../helpers/index.sh
+source /usr/local/bin/helpers/index.sh
+
+function _generate_secret { ( umask 0077 ; dd if=/dev/urandom bs=24 count=1 2>/dev/null | base64 -w0 > "${1}" ; ) ; }
+
+_obtain_hostname_and_domainname
+
+if [[ -n "${SRS_DOMAINNAME}" ]]
+then
+  NEW_DOMAIN_NAME="${SRS_DOMAINNAME}"
+else
+  NEW_DOMAIN_NAME="${DOMAINNAME}"
+fi
+
+sed -i -e "s/localdomain/${NEW_DOMAIN_NAME}/g" /etc/default/postsrsd
+
+POSTSRSD_SECRET_FILE='/etc/postsrsd.secret'
+POSTSRSD_STATE_DIR='/var/mail-state/etc-postsrsd'
+POSTSRSD_STATE_SECRET_FILE="${POSTSRSD_STATE_DIR}/postsrsd.secret"
+
+if [[ -n ${SRS_SECRET} ]]
+then
+  ( umask 0077 ; echo "${SRS_SECRET}" | tr ',' '\n' > "${POSTSRSD_SECRET_FILE}" ; )
+else
+  if [[ ${ONE_DIR} -eq 1 ]]
+  then
+    if [[ ! -f ${POSTSRSD_STATE_SECRET_FILE} ]]
+    then
+      install -d -m 0775 "${POSTSRSD_STATE_DIR}"
+      _generate_secret "${POSTSRSD_STATE_SECRET_FILE}"
+    fi
+
+    install -m 0400 "${POSTSRSD_STATE_SECRET_FILE}" "${POSTSRSD_SECRET_FILE}"
+  elif [[ ! -f ${POSTSRSD_SECRET_FILE} ]]
+  then
+    _generate_secret "${POSTSRSD_SECRET_FILE}"
+  fi
+fi
+
+if [[ -n ${SRS_EXCLUDE_DOMAINS} ]]
+then
+  sed -i -e "s/^#\?SRS_EXCLUDE_DOMAINS=.*$/SRS_EXCLUDE_DOMAINS=${SRS_EXCLUDE_DOMAINS}/g" /etc/default/postsrsd
+fi
+
+/etc/init.d/postsrsd start