libbb: bb_do_delay(3) -> pause_after_failed_login(), and stop looping there

function                                             old     new   delta
pause_after_failed_login                               -       9      +9
vlock_main                                           358     353      -5
sulogin_main                                         252     247      -5
su_main                                              484     479      -5
passwd_main                                          936     931      -5
login_main                                           967     962      -5
bb_do_delay                                           68       -     -68
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/5 up/down: 9/-93)             Total: -84 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 16 insertions, 6 deletions

diff --git a/libbb/bb_do_delay.c b/libbb/bb_do_delay.c
index 65541704b..29343305d 100644
--- a/libbb/bb_do_delay.c
+++ b/libbb/bb_do_delay.c
@@ -8,13 +8,23 @@
  */
 #include "libbb.h"
 
-void FAST_FUNC bb_do_delay(int seconds)
+/* void FAST_FUNC bb_do_delay(int seconds) { ... } - no users yet */
+
+#ifndef LOGIN_FAIL_DELAY
+#define LOGIN_FAIL_DELAY 3
+#endif
+void FAST_FUNC pause_after_failed_login(void)
 {
-        time_t start, now;
+#if 0 /* over-engineered madness */
+        time_t end, diff;
 
-        start = time(NULL);
+        end = time(NULL) + LOGIN_FAIL_DELAY;
+        diff = LOGIN_FAIL_DELAY;
         do {
-                sleep(seconds);
-                now = time(NULL);
-        } while ((now - start) < seconds);
+                sleep(diff);
+                diff = end - time(NULL);
+        } while (diff > 0);
+#else
+        sleep(LOGIN_FAIL_DELAY);
+#endif
 }