Merge pull request #5 from abims-sbr/supp_groups

Add supplementary groups for `RUN_USER`

README.md

@@ -54,4 +54,6 @@ UID: the uid of the user
 GID: the gid of the user
 RUN_USER: the username of the user
 RUN_GROUP: the group of the user
+OTHER_GID: list of supplementary gid (comma separated) which the user is also a member of
+OTHER_RUN_GROUP: list of supplementary group (comma separated) which the user is also a member of. The order must match the order used for OTHER_GID.
 ```

scripts/pre-launch.d/08script_user

@@ -3,7 +3,19 @@ if [ -n "$GID" ]; then
 	getent group $RUN_GROUP &> /dev/null || groupadd $GIDoption $RUN_GROUP
 fi
 
+if [ -n "$OTHER_GID" ]; then
+    IFS=',' read -ra OTHER_GID_ARRAY  <<< "$OTHER_GID"
+    IFS=',' read -ra OTHER_RUN_GROUP_ARRAY  <<< "$OTHER_RUN_GROUP"
+    length=${#OTHER_GID_ARRAY[@]}
+    groups="--groups "
+    for (( i=0; i<$length; i++ )); do
+        getent group ${OTHER_RUN_GROUP_ARRAY[i]} &> /dev/null || groupadd --gid ${OTHER_GID_ARRAY[i]} ${OTHER_RUN_GROUP_ARRAY[i]}
+        groups+="${OTHER_GID_ARRAY[i]},"
+    done
+    otherGIDoption=${groups::-1}
+fi
+
 if [ -n "$UID" ]; then
 	UIDoption="--uid $UID"
-	id -u $RUN_USER &> /dev/null || useradd -d /tmp/$RUN_USER --create-home --no-user-group $UIDoption $GIDoption $RUN_USER
+	id -u $RUN_USER &> /dev/null || useradd -d /tmp/$RUN_USER --create-home --no-user-group $UIDoption $GIDoption $otherGIDoption $RUN_USER
 fi