Added xattrs test to see if the persistent ds supports xattrs; fixes #61

Signed-off-by: Matt Bentley <[email protected]>

Dockerfile.smb

@@ -3,7 +3,7 @@ FROM alpine:3.12
 MAINTAINER Matt Bentley <[email protected]>
 
 # install samba and s6; create supporting directories
-RUN apk add --no-cache avahi avahi-compat-libdns_sd avahi-tools dbus samba-common-tools s6 samba-server &&\
+RUN apk add --no-cache attr avahi avahi-compat-libdns_sd avahi-tools dbus samba-common-tools s6 samba-server &&\
   touch /etc/samba/lmhosts &&\
   rm /etc/samba/smb.conf &&\
   rm /etc/avahi/services/*.service

entrypoint.sh

@@ -435,6 +435,10 @@ else
   fi
 fi
 
+# perform quick test to see if xattrs are supported
+(cd /opt/${TM_USERNAME} && touch xattr-test; setfattr -n user.test -v "hello" xattr-test >/dev/null 2>&1 && rm xattr-test && echo "INFO: xattr test successful - your persistent data store supports xattrs") ||\
+  (echo "WARNING: test to set xattrs on a test file failed. Time machine may fail to back up to your persitent storage location."; rm xattr-test)
+
 # run CMD
 echo "INFO: entrypoint complete; executing '${*}'"
 exec "${@}"