diff --git a/src/lib/source.sh b/src/lib/source.sh
index 56bd70d..7c8afbc 100644
--- a/src/lib/source.sh
+++ b/src/lib/source.sh
@@ -21,22 +21,21 @@ validate_sources() {
     #
     # Usage: validate_sources ARRAY
 
-    # Allowed URI schemes: file, mysql postgres, sqlite
+    # Allowed URI schemes: file, mysql, mariadb, postgres, sqlite
     # No required schemes.
 
-    local array=("$@")
     local scheme=
 
-    for uri in "${array[@]}"; do
+    for uri in "$@"; do
         scheme="${uri%%:*}"
 
         # Process Path-only URI
         if [[ "$scheme" == "$uri" ]]; then scheme='file'; fi
 
         case "$scheme" in
-            file|mysql|postgres|sqlite) : ;; # do nothing, this is OK
+            file|mysql|mariadb|postgres|sqlite) : ;; # do nothing, this is OK
             *)  # shellcheck disable=SC2154
-                echo "Error: $__user_script:" \
+                echo "Error: $backup_script:" \
                     "Unsupported URI scheme: $scheme" >&2; exit 1;;
         esac
     done
@@ -50,11 +49,10 @@ validate_targets() {
     # Allowed URI schemes: file, ftp, sftp, rsync, s3, swift, sj, dav, davs
     # Required schemes (one or more times): file
 
-    local array=("$@")
     local scheme=
     local file_targets=()
 
-    for uri in "${array[@]}"; do
+    for uri in "$@"; do
         scheme="${uri%%:*}"
 
         # Process Path-only URI
@@ -67,7 +65,7 @@ validate_targets() {
                 fi
             ;;
             *)
-                echo "Error: $__user_script:" \
+                echo "Error: $backup_script:" \
                     "Unsupported URI scheme: $scheme" >&2
                 exit 1
             ;;
@@ -75,7 +73,7 @@ validate_targets() {
     done
 
     if [ "${#file_targets[@]}" -eq 0 ]; then
-        echo -e "Error: $__user_script: 'file' scheme is not set in targets."\
+        echo -e "Error: $backup_script: 'file' scheme is not set in targets."\
             "You must provide one or more targets with 'file' scheme." >&2
         exit 1
     else
@@ -88,7 +86,7 @@ validate_targets() {
         if [ -d "$path" ]; then
             __main_target_path="$path"
         else
-            echo "Error: $__user_script:" \
+            echo "Error: $backup_script:" \
                 "Path '$path' from URI '$__main_target'" \
                 "does not exists or not a directory" >&2
             exit 1
@@ -109,23 +107,25 @@ source_script() {
 
     # Dry run script, check syntax. See manpage set(1)
     if ! bash -n "$script"; then
-        echo "Error: $__user_script: Please check your syntax" >&2; exit 1
+        echo "Error: $backup_script: Please check your syntax" >&2; exit 1
     fi
 
     # Source script
     # shellcheck disable=SC1090
-    . "$script"
+    if ! . "$(realpath "$script")"; then
+        echo "Error: Cannot source script: $script" >&2; exit 1;
+    fi
 
     # Check required variables
     if [ -n "$sources" ]; then
         validate_sources "${sources[@]}"
     else
-        echo "Error: $__user_script: sources array is not set" >&2; exit 1
+        echo "Error: $backup_script: sources array is not set" >&2; exit 1
     fi
 
     if [ -n "$targets" ]; then
         validate_targets "${targets[@]}"
     else
-        echo "Error: $__user_script: targets array is not set" >&2; exit 1
+        echo "Error: $backup_script: targets array is not set" >&2; exit 1
     fi
 }