AW: Cannot log in as root directly, but su works

[Martetschlaeger Stefan]

Hi all, 

I've finally solved the problem. 
It's been a problem with the securetty checks in login, because login assumes that 
the ttyxx is in the /dev/ directory. In fact the tty device was (due to /dev beeing 
a symlink) in /mnt/ramdisk0/dev/ttyS0 which didn't resolve to ttyS0 in the login 
applet and thus not allowing root to login. 
The fix would be to either change all entries in securetty to the mnt/ramdisk... 
directory or change the behaviour of login to assume that the tty devicefile is 
beeing held in /dev. 
I've attached a patch for the latter case :)

Cheers,
Steve

diff -uNr tmp/busybox-1.4.1/loginutils/login.c busybox-1.4.1/loginutils/login.c
--- tmp/busybox-1.4.1/loginutils/login.c	2007-01-24 22:34:48.000000000 +0100
+++ busybox-1.4.1/loginutils/login.c	2007-03-12 17:23:22.000000000 +0100
@@ -250,8 +250,8 @@
 	tmp = ttyname(0);
 	if (tmp) {
 		safe_strncpy(full_tty, tmp, sizeof(full_tty));
-		if (strncmp(full_tty, "/dev/", 5) == 0)
-			short_tty = full_tty + 5;
+		if (strstr(full_tty, "/dev/") != NULL)
+			short_tty = strstr(full_tty, "/dev/") + 5;
 	}
 
 	read_or_build_utent(!amroot);