trunc: check for `close'-ing the fd errors.

ChangeLog

@@ -1,3 +1,8 @@
+2011-12-11  Giuseppe Scrivano  <gscrivano@gnu.org>
+
+	* util/trunc.c (main): Call `close' on the fd and check for errors.
+	Reported by: <dga@cs.cmu.edu>.
+
 2011-10-23  Giuseppe Scrivano  <gscrivano@gnu.org>
 
 	* bootstrap.conf (gnulib_modules): Include module `vsnprintf'.

util/trunc.c

@@ -128,5 +128,11 @@ main (int argc, char *argv[])
       exit (EXIT_FAILURE);
     }
 
+  if (close (fd) < 0)
+    {
+      perror (PROGRAM_NAME ": close");
+      exit (EXIT_FAILURE);
+    }
+
   return 0;
 }