Fix runmqserver error handling

cmd/runmqserver/license.go

@@ -0,0 +1,91 @@
+/*
+© Copyright IBM Corporation 2017
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package main
+
+import (
+	"errors"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// resolveLicenseFile returns the file name of the MQ license file, taking into
+// account the language set by the LANG environment variable
+func resolveLicenseFile() string {
+	lang, ok := os.LookupEnv("LANG")
+	if !ok {
+		return "English.txt"
+	}
+	switch {
+	case strings.HasPrefix(lang, "zh_TW"):
+		return "Chinese_TW.txt"
+	case strings.HasPrefix(lang, "zh"):
+		return "Chinese.txt"
+	case strings.HasPrefix(lang, "cs"):
+		return "Czech.txt"
+	case strings.HasPrefix(lang, "fr"):
+		return "French.txt"
+	case strings.HasPrefix(lang, "de"):
+		return "German.txt"
+	case strings.HasPrefix(lang, "el"):
+		return "Greek.txt"
+	case strings.HasPrefix(lang, "id"):
+		return "Indonesian.txt"
+	case strings.HasPrefix(lang, "it"):
+		return "Italian.txt"
+	case strings.HasPrefix(lang, "ja"):
+		return "Japanese.txt"
+	case strings.HasPrefix(lang, "ko"):
+		return "Korean.txt"
+	case strings.HasPrefix(lang, "lt"):
+		return "Lithuanian.txt"
+	case strings.HasPrefix(lang, "pl"):
+		return "Polish.txt"
+	case strings.HasPrefix(lang, "pt"):
+		return "Portugese.txt"
+	case strings.HasPrefix(lang, "ru"):
+		return "Russian.txt"
+	case strings.HasPrefix(lang, "sl"):
+		return "Slovenian.txt"
+	case strings.HasPrefix(lang, "es"):
+		return "Spanish.txt"
+	case strings.HasPrefix(lang, "tr"):
+		return "Turkish.txt"
+	}
+	return "English.txt"
+}
+
+func checkLicense() (bool, error) {
+	lic, ok := os.LookupEnv("LICENSE")
+	switch {
+	case ok && lic == "accept":
+		return true, nil
+	case ok && lic == "view":
+		file := filepath.Join("/opt/mqm/licenses", resolveLicenseFile())
+		buf, err := ioutil.ReadFile(file)
+		if err != nil {
+			log.Println(err)
+			return false, err
+		}
+		log.Println(string(buf))
+		return false, nil
+	}
+	log.Println("Error: Set environment variable LICENSE=accept to indicate acceptance of license terms and conditions.")
+	log.Println("License agreements and information can be viewed by setting the environment variable LICENSE=view.  You can also set the LANG environment variable to view the license in a different language.")
+	return false, errors.New("Set environment variable LICENSE=accept to indicate acceptance of license terms and conditions")
+}