Add backward compatibility to FTL service by creating symlinks

Signed-off-by: Christian König <ckoenig@posteo.de>

advanced/Templates/pihole-FTL.service

@@ -68,19 +68,26 @@ start() {
   else
     # Touch files to ensure they exist (create if non-existing, preserve if existing)
     mkdir -pm 0755 /run/pihole
+    mkdir -pm 0755 /var/log/pihole
     [ ! -f "${FTL_PID_FILE}" ] && install -m 644 -o pihole -g pihole /dev/null "${FTL_PID_FILE}"
     [ ! -f "${FTL_PORT_FILE}" ] && install -m 644 -o pihole -g pihole /dev/null "${FTL_PORT_FILE}"
     [ ! -f /var/log/pihole/pihole-FTL.log ] && install -m 644 -o pihole -g pihole /dev/null /var/log/pihole/pihole-FTL.log
     [ ! -f /var/log/pihole/pihole.log ] && install -m 644 -o pihole -g pihole /dev/null /var/log/pihole/pihole.log
     [ ! -f /etc/pihole/dhcp.leases ] && install -m 644 -o pihole -g pihole /dev/null /etc/pihole/dhcp.leases
     # Ensure that permissions are set so that pihole-FTL can edit all necessary files
-    chown pihole:pihole /run/pihole /etc/pihole /var/log/pihole/pihole-FTL.log /var/log/pihole/pihole.log /etc/pihole/dhcp.leases
+    chown pihole:pihole /run/pihole /etc/pihole /var/log/pihole /var/log/pihole/pihole-FTL.log /var/log/pihole/pihole.log /etc/pihole/dhcp.leases
     # Ensure that permissions are set so that pihole-FTL can edit the files. We ignore errors as the file may not (yet) exist
     chmod -f 0644 /etc/pihole/macvendor.db /etc/pihole/dhcp.leases /var/log/pihole/pihole-FTL.log /var/log/pihole/pihole.log
     # Chown database files to the user FTL runs as. We ignore errors as the files may not (yet) exist
     chown -f pihole:pihole /etc/pihole/pihole-FTL.db /etc/pihole/gravity.db /etc/pihole/macvendor.db
     # Chown database file permissions so that the pihole group (web interface) can edit the file. We ignore errors as the files may not (yet) exist
     chmod -f 0664 /etc/pihole/pihole-FTL.db
+
+    # Backward compatibility for user-scripts that still expect log files in /var/log instead of /var/log/pihole/
+    # Should be removed with Pi-hole v6.0
+    [ ! -f /var/log/pihole.log ] && ln -s /var/log/pihole/pihole.log /var/log/pihole.log
+    [ ! -f /var/log/pihole/pihole-FTL.log ] && ln -s /var/log/pihole/pihole-FTL.log /var/log/pihole-FTL.log
+
     if setcap CAP_NET_BIND_SERVICE,CAP_NET_RAW,CAP_NET_ADMIN,CAP_SYS_NICE,CAP_IPC_LOCK,CAP_CHOWN+eip "/usr/bin/pihole-FTL"; then
       su -s /bin/sh -c "/usr/bin/pihole-FTL" pihole
     else