Patch for Debian bug #537848

pam_securetty should not return PAM_USER_UNKNOWN when the tty is secure.
regardless of what was entered as a username.

Authors: Nicolas François <nicolas.francois@centraliens.net>

Upstream status: committed to CVS

Index: sid/modules/pam_securetty/pam_securetty.c
===================================================================
--- sid.orig/modules/pam_securetty/pam_securetty.c	2009-07-23 17:39:36.904158303 +0200
+++ sid/modules/pam_securetty/pam_securetty.c	2009-07-23 17:48:55.596157670 +0200
@@ -82,13 +82,11 @@
     }
 
     user_pwd = pam_modutil_getpwnam(pamh, username);
-    if (user_pwd == NULL) {
-	return PAM_USER_UNKNOWN;
-    } else if (user_pwd->pw_uid != 0) { /* If the user is not root,
-					   securetty's does not apply
-					   to them */
+    if (user_pwd != NULL && user_pwd->pw_uid != 0) {
+	/* If the user is not root, securetty's does not apply to them */
 	return PAM_SUCCESS;
     }
+    /* The user is now either root or an invalid / mistyped username */
 
     retval = pam_get_item(pamh, PAM_TTY, &void_uttyname);
     uttyname = void_uttyname;
@@ -102,6 +100,9 @@
 	pam_syslog(pamh, LOG_DEBUG, "access allowed for '%s' on '%s'",
 	           username, uttyname);
     } else if (retval != PAM_SUCCESS) {
+	if (user_pwd == NULL) {
+	    retval = PAM_USER_UNKNOWN;
+	}
 	pam_syslog(pamh, LOG_WARNING, "access denied: tty '%s' is not secure !",
 	           uttyname);
     }