From cec4ead904978b07db2154c618eeb48d3102da66 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 16 Apr 2013 03:57:50 +0200
Subject: [PATCH] util: make sure result of hostname_cleanup() passes
 hostname_is_valid()

---
 src/shared/util.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/src/shared/util.c b/src/shared/util.c
index 5d6995d23..4eb64934e 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -3837,19 +3837,24 @@ bool hostname_is_valid(const char *s) {
 
 char* hostname_cleanup(char *s) {
         char *p, *d;
+        bool dot;
+
+        for (p = s, d = s, dot = true; *p; p++) {
+                if (*p == '.') {
+                        if (dot || p[1] == 0)
+                                continue;
 
-        for (p = s, d = s; *p; p++)
-                if ((*p >= 'a' && *p <= 'z') ||
-                    (*p >= 'A' && *p <= 'Z') ||
-                    (*p >= '0' && *p <= '9') ||
-                    *p == '-' ||
-                    *p == '_' ||
-                    *p == '.')
+                        dot = true;
+                } else
+                        dot = false;
+
+                if (hostname_valid_char(*p))
                         *(d++) = *p;
+        }
 
         *d = 0;
-
         strshorten(s, HOST_NAME_MAX);
+
         return s;
 }
 
-- 
2.30.2