[PATCH] sulogin: fix FEATURE_SHADOWPASSWDS sematics

[Qi.Chen at windriver.com]

From: Chen Qi <qi.chen at windriver.com>

In other parts of busybox such as adduser and deluser, FEATURE_SHADOWPASSWDS
indicates that the command will check /etc/shadow but it doesn't require
it as a necessity.

In sulogin, however, if FEATURE_SHADOWPASSWDS is enabled, the command requires
/etc/shadow to be available.

Here's a problem with the above behaviour. In a sysv-based system, if we boot
into runlevel S by default, the system will diplay the 'no password for root'
error message without a stop at boot time

The patch fixes the above problem by making sulogin to follow the same sematics
of FEATURE_SHADOWPASSWDS as in useradd and userdel.

Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
---
 loginutils/sulogin.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/loginutils/sulogin.c b/loginutils/sulogin.c
index bd2b09e..b03540a 100644
--- a/loginutils/sulogin.c
+++ b/loginutils/sulogin.c
@@ -68,10 +68,9 @@ int sulogin_main(int argc UNUSED_PARAM, char **argv)
 		 * At least glibc 2.4 does this. Be extra paranoid here. */
 		struct spwd *result = NULL;
 		int r = getspnam_r(pwd->pw_name, &spw, buffer, sizeof(buffer), &result);
-		if (r || !result) {
-			goto auth_error;
+		if (!r && result) {
+			pwd->pw_passwd = result->sp_pwdp;
 		}
-		pwd->pw_passwd = result->sp_pwdp;
 	}
 #endif
 
-- 
1.7.9.5