remove strange bloat dup2() usage, sync this code with mainstream login-utils, size reduce

1 files changed, 2 insertions, 3 deletions

diff --git a/loginutils/getty.c b/loginutils/getty.c
index e8643ef93..1cfbd6734 100644
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -528,12 +528,11 @@ static void open_tty(char *tty, struct termio *tp, int local)
 
                 /* Open the tty as standard input. */
 
+                close(0);
                 debug("open(2)\n");
                 fd = open(tty, O_RDWR | O_NONBLOCK, 0);
-                if (dup2(fd, STDIN_FILENO) == -1)
+                if (fd != 0)
                         error("/dev/%s: cannot open as standard input: %m", tty);
-                close(fd);
-
         } else {
 
                 /*