introduce LONE_CHAR (optimized strcmp with one-char string)

1 files changed, 2 insertions, 3 deletions

diff --git a/libbb/correct_password.c b/libbb/correct_password.c
index fd7e0b56c..d031b2109 100644
--- a/libbb/correct_password.c
+++ b/libbb/correct_password.c
@@ -40,15 +40,14 @@ int correct_password(const struct passwd *pw)
         char *unencrypted, *encrypted, *correct;
 
 #ifdef CONFIG_FEATURE_SHADOWPASSWDS
-        if (!strcmp(pw->pw_passwd, "x") || !strcmp(pw->pw_passwd, "*")) {
+        if (LONE_CHAR(pw->pw_passwd, 'x') || LONE_CHAR(pw->pw_passwd, '*')) {
                 struct spwd *sp = getspnam(pw->pw_name);
 
                 if (!sp)
                         bb_error_msg_and_die("no valid shadow password");
 
                 correct = sp->sp_pwdp;
-        }
-        else
+        } else
 #endif
                 correct = pw->pw_passwd;