Resolved bfenetworks#800 support test configuration

Signed-off-by: kwanhur <[email protected]>

bfe.go

@@ -43,6 +43,7 @@ var (
 	showVersion = flag.Bool("v", false, "to show version of bfe")
 	showVerbose = flag.Bool("V", false, "to show verbose information about bfe")
 	debugLog    = flag.Bool("d", false, "to show debug log (otherwise >= info)")
+	testConf    = flag.Bool("t", false, "test configuration and exit")
 )
 
 var version string
@@ -84,23 +85,33 @@ func main() {
 	log4go.SetLogFormat(log4go.FORMAT_DEFAULT_WITH_PID)
 	log4go.SetSrcLineForBinLog(false)
 
-	err = log.Init("bfe", logSwitch, *logPath, *stdOut, "midnight", 7)
+	err = log.Init("bfe", logSwitch, *logPath, *stdOut || *testConf, "midnight", 7)
 	if err != nil {
 		fmt.Printf("bfe: err in log.Init():%s\n", err.Error())
 		bfe_util.AbnormalExit()
 	}
 
-	log.Logger.Info("bfe[version:%s] start", version)
+	if !*testConf {
+		log.Logger.Info("bfe[version:%s] start", version)
+	}
 
 	// load server config
 	confPath := path.Join(*confRoot, "bfe.conf")
 	config, err = bfe_conf.BfeConfigLoad(confPath, *confRoot)
 	if err != nil {
 		log.Logger.Error("main(): in BfeConfigLoad():%s", err.Error())
+		if *testConf {
+			fmt.Printf("bfe: configuration file %s test failed\n", confPath)
+		}
 		bfe_util.AbnormalExit()
 	}
 
-	// maximum number of CPUs (GOMAXPROCS) defaults to runtime.CPUNUM 
+	if *testConf {
+		fmt.Printf("bfe: configuration file %s test is successful\n", confPath)
+		bfe_util.NormalExit()
+	}
+
+	// maximum number of CPUs (GOMAXPROCS) defaults to runtime.CPUNUM
 	// if running on machine, or CPU quota if running on container
 	// (with the help of "go.uber.org/automaxprocs").
 	// here, we change maximum number of cpus if the MaxCpus is positive.

bfe_util/exit.go

@@ -22,9 +22,17 @@ import (
 	"github.com/baidu/go-lib/log"
 )
 
-func AbnormalExit() {
+func exit(code int) {
 	// waiting for logger finish jobs
 	log.Logger.Close()
 	// exit
-	os.Exit(1)
+	os.Exit(code)
+}
+
+func AbnormalExit() {
+	exit(1)
+}
+
+func NormalExit() {
+	exit(0)
 }