Move cmd line args handling to "src/main.c"

src/dwm.c

@@ -11,7 +11,6 @@
 
 #include <locale.h>
 #include <signal.h>
-#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -276,16 +275,8 @@ static void (*handler[LASTEvent])(XEvent*) = {
 #include "dwm/layouts.c"
 #include "dwm/xerror.c"
 
-int dwm_main(int argc, char *argv[])
+int dwm_main()
 {
-	if (argc == 2 && !strcmp("-v", argv[1])) {
-		die("polytreewm-"VERSION);
-	}
-
-	if (argc != 1) {
-		die("usage: polytreewm [-v]");
-	}
-
 	if (!setlocale(LC_CTYPE, "") || !XSupportsLocale()) {
 		fputs("warning: no locale support\n", stderr);
 	}

src/dwm.h

@@ -1,6 +1,6 @@
 #ifndef _DWM_H
 #define _DWM_H
 
-int dwm_main(int argc, char *argv[]);
+int dwm_main();
 
 #endif // _DWM_H

src/main.c

@@ -1,6 +1,32 @@
 #include "dwm.h"
 
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void die(const char *fmt, ...);
+
 int main(int argc, char *argv[])
 {
+	if (argc == 2 && strcmp(argv[1], "-v") == 0) {
+		die("polytreewm-"VERSION);
+	}
+
+	if (argc != 1) {
+		die("usage: polytreewm [-v]");
+	}
+
 	return dwm_main(argc, argv);
 }
+
+void die(const char *const fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	fputc('\n', stderr);
+
+	exit(EXIT_FAILURE);
+}