In route.c in newroute() there's a call to exit(0) if the command was

'get'. Since rtmsg() always gets called and returns 0 on success and -1
on failure, it's possible to exit with a suitable exit code by calling
exit(ret != 0) instead, as is done at the end of newroute().

PR:		bin/112303
Submitted by:	bruce@cran.org.uk
MFC after:	1 week

sbin/route/route.c

@@ -748,7 +748,7 @@ newroute(argc, argv)
 			break;
 	}
 	if (*cmd == 'g')
-		exit(0);
+		exit(ret != 0);
 	if (!qflag) {
 		oerrno = errno;
 		(void) printf("%s %s %s", cmd, ishost? "host" : "net", dest);