[hackers] [ubase] Check if stdin is a tty || sin

[git]

commit c4c1feac2a7cba8b2c5282810a30b192d0e30623
Author: sin <s...@2f30.org>
Date:   Tue Jun 3 10:45:27 2014 +0100

    Check if stdin is a tty
    
    Some indentation changes as well.

diff --git a/login.c b/login.c
index 3c8d6e0..b9720e4 100644
--- a/login.c
+++ b/login.c
@@ -38,6 +38,9 @@ main(int argc, char *argv[])
        if (argc < 1)
                usage();
 
+       if (isatty(STDIN_FILENO) == 0)
+               eprintf("stdin is not a tty
");
+
        errno = 0;
        pw = getpwnam(argv[0]);
        if (errno)
@@ -59,7 +62,7 @@ main(int argc, char *argv[])
                goto login;
 
        /* Flush pending input */
-        ioctl(STDIN_FILENO, TCFLSH, (void *)0);
+       ioctl(STDIN_FILENO, TCFLSH, (void *)0);
 
        pass = getpass("Password: ");
        putchar('
');