introduce LONE_CHAR (optimized strcmp with one-char string)

1 files changed, 3 insertions, 2 deletions

diff --git a/init/init.c b/init/init.c
index 213a5c149..bc53feeae 100644
--- a/init/init.c
+++ b/init/init.c
@@ -1047,8 +1047,9 @@ int init_main(int argc, char **argv)
         }
 
         /* Check if we are supposed to be in single user mode */
-        if (argc > 1 && (!strcmp(argv[1], "single") ||
-                                         !strcmp(argv[1], "-s") || !strcmp(argv[1], "1"))) {
+        if (argc > 1
+         && (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || LONE_CHAR(argv[1], '1'))
+        ) {
                 /* Start a shell on console */
                 new_init_action(RESPAWN, bb_default_login_shell, "");
         } else {