split main function;

.gitignore

@@ -4,3 +4,4 @@ graftcp-local/.gopath
 
 *.o
 *.d
+*.a

Makefile

@@ -47,9 +47,13 @@ TARGET = graftcp $(GRAFTCP_LOCAL_BIN)
 
 all:: $(TARGET)
 
-graftcp: main.o util.o string-set.o
+
+graftcp: cmd.o libgraftcp.a
 	$(CC) $^ -o $@
 
+libgraftcp.a: main.o util.o string-set.o
+	$(AR) rcs $@ $^
+
 %.o: %.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 

cmd.c

@@ -0,0 +1,5 @@
+int _main(int argc, char **argv);
+
+int main(int argc, char **argv){
+    return _main(argc, argv);
+}

graftcp-local/main.go

@@ -1,11 +1,12 @@
 package main
 
 import (
-	"flag"
+	_flag "flag"
 	"fmt"
 	"os"
 	"syscall"
 
+	"context"
 	"github.com/jedisct1/dlog"
 	"github.com/kardianos/service"
 )
@@ -58,7 +59,9 @@ func (app *App) Stop(s service.Service) error {
 	return nil
 }
 
-func main() {
+func local_main(cmdName string, args []string, ctx... context.Context) {
+	flag := _flag.NewFlagSet(cmdName, _flag.ExitOnError)
+
 	var configFile string
 	dlog.Init("graftcp-local", dlog.SeverityInfo, "")
 
@@ -90,7 +93,10 @@ func main() {
 	flag.StringVar(&configFile, "config", "", "Path to the configuration file")
 	flag.StringVar(&app.PipePath, "pipepath", "/tmp/graftcplocal.fifo", "Pipe path for graftcp to send address info")
 	v := flag.Bool("version", false, "Print the graftcp-local version information")
-	flag.Parse()
+	if err := flag.Parse(args); err!= nil{
+		fmt.Printf("Wrong command line arguments for %s: %s\n", cmdName, err.Error())
+		os.Exit(1)
+	}
 	if *v {
 		fmt.Printf("graftcp-local version %s\n", version)
 		os.Exit(0)
@@ -127,3 +133,7 @@ func main() {
 		app.Start(nil)
 	}
 }
+
+func main(){
+	local_main(os.Args[0], os.Args[1:])
+}

main.c

@@ -378,7 +378,7 @@ static void usage(char **argv)
 		"\n", argv[0]);
 }
 
-int main(int argc, char **argv)
+int _main(int argc, char **argv)
 {
 	int opt, index;
 	bool ignore_local = true;