Docker persistent home

docker/rootfs/etc/cont-init.d/00-app-user-map.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/with-contenv sh
+
+#
+# Add the app user to the password and group databases.  This is needed just to
+# make sure that mapping between the user/group ID and its name is possible.
+#
+
+set -e # Exit immediately if a command exits with a non-zero status.
+set -u # Treat unset variables as an error.
+
+cp /defaults/passwd /etc/passwd
+cp /defaults/group /etc/group
+cp /defaults/shadow /etc/shadow
+chown root:shadow /etc/shadow
+chmod 640 /etc/shadow
+
+echo "$APP_USER:x:$USER_ID:$GROUP_ID::${APP_HOME:-/dev/null}:/sbin/nologin" >> /etc/passwd
+echo "$APP_USER:x:$GROUP_ID:" >> /etc/group
+
+# Make sure APP_HOME is editable by the user
+if [[ -n "$APP_HOME" ]] ; then
+    chown -R "$APP_USER" "$APP_HOME"
+    chmod -R u+rw "$APP_HOME"
+fi
+
+# vim:ft=sh:ts=4:sw=4:et:sts=4
+