every platform provides sys_random_seed() and SYS_RANDOM_SEED goes away

sys/msdos/msdos.c

@@ -519,4 +519,15 @@ unsigned setvalue;
     return (regs.x.dx);
 }
 
+unsigned long
+sys_random_seed(VOID_ARGS)
+{
+    unsigned long ourseed = 0UL;
+    time_t datetime = 0;
+
+    (void) time(&datetime);
+    ourseed = (unsigned long) datetime;
+    return ourseed;
+}
+
 #endif /* MSDOS */