>From 98802d166215602a88988ae566259edf4f67efe8 Mon Sep 17 00:00:00 2001
From: Bruno Haible <address@hidden>
Date: Sat, 6 Jul 2019 00:43:01 +0200
Subject: [PATCH 3/5] xgethostname: Don't return an excessive memory
 allocation.

* lib/xgethostname.c (xgethostname): Shrink the hostname buffer before
returning it.
---
 ChangeLog          |  6 ++++++
 lib/xgethostname.c | 11 +++++++++++
 2 files changed, 17 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index d091eb1..c8dd18a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2019-07-05  Bruno Haible  <address@hidden>
 
+	xgethostname: Don't return an excessive memory allocation.
+	* lib/xgethostname.c (xgethostname): Shrink the hostname buffer before
+	returning it.
+
+2019-07-05  Bruno Haible  <address@hidden>
+
 	areadlinkat-with-size: Don't return an excessive memory allocation.
 	* lib/areadlinkat-with-size.c (areadlinkat_with_size): Shrink the buffer
 	before returning it.
diff --git a/lib/xgethostname.c b/lib/xgethostname.c
index eba34b8..4bcb00f 100644
--- a/lib/xgethostname.c
+++ b/lib/xgethostname.c
@@ -70,5 +70,16 @@ xgethostname (void)
         }
     }
 
+  /* Shrink HOSTNAME before returning it.  */
+  {
+    size_t actual_size = strlen (hostname) + 1;
+    if (actual_size < size)
+      {
+        char *shrinked_hostname = realloc (hostname, actual_size);
+        if (shrinked_hostname != NULL)
+          hostname = shrinked_hostname;
+      }
+  }
+
   return hostname;
 }
-- 
2.7.4