Use `tr '[:lower:]' '[:upper:]'` to upcase

5 years ago · 30b80f3489
1 changed files with 1 additions and 1 deletions
--- a/dnsapi/dns_ali.sh
+++ b/dnsapi/dns_ali.sh
@ -310,7 +310,7 @@ _ali_url_encode(){
        ;;
      #other hex
      *)
-        printf '%%%s' "$_hex_code" | tr 'a-z' 'A-Z'
+        printf '%%%s' "$_hex_code" | tr '[:lower:]' '[:upper:]'
        ;;
    esac
  done