Add RUNAS_USER to control the user running resilio-sync

README.md

@@ -54,6 +54,16 @@ To change maxmimum file size to 50 MB add
 
 to the docker start command
 
+### RUNAS_USER
+
+This variable (along with RUNAS_UID, RUNAS_GROUP and RUNAS_GID) provide a way to control which user will run Resilio Sync and own the synced files.
+Useful when dealing with shared volumes.
+
+### LOG_TO_STDOUT
+
+The default logging uses file /var/log/rslsync.log.
+By defining the LOG_TO_STDOUT variable the Resilio Sync logs are outputted to stdout.
+
 ### syncing local files
 
 Inside the container the /data is the default sync directory, to link this to a local file system you can use the **-v** flag

root/etc/run_once/config_rslsync

@@ -21,18 +21,36 @@ if [ -z $RSLSYNC_PATH ]; then
   RSLSYNC_PATH="/data"
 fi
 
+# prepare to run as a different user
+
+if [ -z $RUNAS_USER ]; then
+  USER_HOME="/root"
+else
+  USER_HOME="/home/$RUNAS_USER"
+  addgroup -g $RUNAS_GID -S $RUNAS_GROUP
+  adduser -u $RUNAS_UID -D -S -G $RUNAS_GROUP $RUNAS_USER
+
+  chown -R $RUNAS_USER /etc/rslsync
+  if [ -z $LOG_TO_STDOUT ]; then
+    touch /var/log/rslsync.log
+    chown -R $RUNAS_USER /var/log/rslsync.log
+  fi
+
+  chown -R $RUNAS_USER $RSLSYNC_PATH
+fi
+
 # create base configuration
 
 cat <<EOT > /etc/rslsync/rslsync.conf
 {
-  "storage_path" : "/root",
+  "storage_path" : "$USER_HOME",
   "listening_port" : 33333,
   "use_upnp" : false,
   "vendor" : "docker",
   "max_file_size_for_versioning" : $RSLSYNC_SIZE,
   "sync_trash_ttl" : $RSLSYNC_TRASH_TIME,
   "device_name" : "$RSLSYNC_NAME", 
-  "pid_file" : "/var/run/rslsync.pid",
+  "pid_file" : "$USER_HOME/rslsync.pid",
 EOT
 # check to see if webui should be activated
 

root/etc/sv/rslsync/run

@@ -1,3 +1,8 @@
 #!/bin/sh
 exec 2>&1
-exec /usr/local/bin/rslsync --config /etc/rslsync/rslsync.conf --log /var/log/rslsync.log --nodaemon
+source /etc/envvars
+LOG_LOCATION=""
+if [ -z $LOG_TO_STDOUT ]; then
+  LOG_LOCATION=" --log /var/log/rslsync.log "
+fi
+su -c "/usr/local/bin/rslsync --config /etc/rslsync/rslsync.conf $LOG_LOCATION --nodaemon" -s /bin/sh $RUNAS_USER