Improve service configuration

Dockerfile

@@ -5,6 +5,7 @@ ENV USERNAME samba
 ENV GID 1000
 ENV GROUP samba
 ENV PASSWORD password
+ENV CONFIG /config/smb.conf
 
 RUN set -xe \
 	&& apk add --update --no-progress samba-common-tools samba-server openssl \
@@ -22,10 +23,8 @@ RUN set -xe \
 	&& apk del gpg \
 	&& rm -rf /tmp/s6-overlay-amd64.tar.gz /tmp/s6-overlay-amd64.tar.gz.sig /root/.gnupg /var/cache/apk/*
 
-COPY samba.s6 /etc/services.d/samba/run
-
-RUN mkdir /config
-VOLUME ["/config"]
+COPY run.s6 /etc/services.d/samba/run
+COPY finish.s6 /etc/services.d/samba/finish
 
 EXPOSE 137/udp 138/udp 139/tcp 445/tcp
 

finish.s6

@@ -0,0 +1,3 @@
+#!/usr/bin/execlineb -S0
+
+s6-svscanctl -t /var/run/s6/services

run.s6

@@ -0,0 +1,13 @@
+#!/usr/bin/with-contenv sh
+
+if [ ! -f "${CONFIG}" ]; then
+	echo "ERROR: You must pass though a Samba config file at \"${CONFIG}\" or change \$CONFIG to the config file path"
+	exit 1
+fi
+
+addgroup -g ${GID} ${GROUP} > /dev/null 2&>1
+adduser -S -G ${GROUP} -u ${UID} -H -D ${USERNAME}
+echo "${PASSWORD}" | tee - | smbpasswd -s -c "${CONFIG}" -a ${USERNAME}
+
+nmbd --foreground --log-stdout --configfile="${CONFIG}" &
+smbd --foreground --log-stdout --configfile="${CONFIG}"

samba.s6

@@ -1,8 +0,0 @@
-#!/usr/bin/with-contenv sh
-
-addgroup -g ${GID} ${GROUP}
-adduser -S -G ${GROUP} -u ${UID} -H -D ${USERNAME}
-echo "${PASSWORD}" | tee - | smbpasswd -s -c /config/smb.conf -a ${USERNAME}
-
-nmbd --foreground --log-stdout --configfile=/config/smb.conf &
-smbd --foreground --log-stdout --configfile=/config/smb.conf