Fixed issue TheLocehiliosan#455-lowercasing checks on both sides - Mo…

…re POSIX friendly 2

yadm

@@ -204,15 +204,15 @@ function score_file() {
         return
       fi
     elif [[ "$label" =~ ^(d|distro)$ ]]; then
-      value="$(echo $value | tr '[:upper:]' '[:lower:]')"
+      value=$(echo "$value" | "${AWK_PROGRAM[0]}" '{print tolower($0)}')
       if [ "${value/\ /_}" = "${local_distro/\ /_}" ]; then
         score=$((score + 4))
       else
         score=0
         return
       fi
     elif [[ "$label" =~ ^(f|distro_family)$ ]]; then
-      value="$(echo $value | tr '[:upper:]' '[:lower:]')"
+      value=$(echo "$value" | "${AWK_PROGRAM[0]}" '{print tolower($0)}')
       if [ "${value/\ /_}" = "${local_distro_family/\ /_}" ]; then
         score=$((score + 8))
       else
@@ -1524,7 +1524,7 @@ function query_distro() {
       fi
     done < "$OS_RELEASE"
   fi
-  echo "$distro" | tr '[:upper:]' '[:lower:]'
+  echo "$distro" | "${AWK_PROGRAM[0]}" '{print tolower($0)}'
 }
 
 function query_distro_family() {
@@ -1535,10 +1535,13 @@ function query_distro_family() {
         family="${line#ID_LIKE=}"
         family="${family//\"}"
         break
+      elif [[ -z "$family" && "$line" = ID=* ]]; then
+        family="${line#ID=}"
+        family="${family//\"}"
       fi
     done < "$OS_RELEASE"
   fi
-  echo "$family" | tr '[:upper:]' '[:lower:]'
+  echo "$distro" | "${AWK_PROGRAM[0]}" '{print tolower($0)}'
 }
 
 function process_global_args() {