prog: systemd: simple function call test

programs/systemd/main.c

@@ -1,4 +1,14 @@
-int main(void)
+#include <mango/log.h>
+#include <stdio.h>
+
+int main(int argc, const char *argv[])
 {
+	kern_logf("systemd");
+	kern_logf("args:");
+
+	for (int i = 0; i < argc; i++) {
+		kern_logf("[%d]: %s", i, argv[i]);
+	}
+
 	return 0;
 }