explicitly ignore close return value to placate static analyzers

* src/util.c: Include "ignore-value.h".
(ask): Use ignore_value to tell tools that yes, we really do
mean to ignore any close failure on this error path.
* bootstrap.conf (gnulib_modules): Add ignore-value.

2 files changed, 3 insertions, 1 deletions

diff --git a/bootstrap.conf b/bootstrap.conf
index 607ad1a..a460c57 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -34,6 +34,7 @@ gettime
 gitlog-to-changelog
 git-version-gen
 hash
+ignore-value
 lchmod
 lstat
 maintainer-makefile
diff --git a/src/util.c b/src/util.c
index 0fb22d6..1f25c98 100644
--- a/src/util.c
+++ b/src/util.c
@@ -29,6 +29,7 @@
 #include <xalloc.h>
 
 #include <getdate.h>
+#include "ignore-value.h"
 
 #include <signal.h>
 #if !defined SIGCHLD && defined SIGCLD
@@ -1007,7 +1008,7 @@ ask (char const *format, ...)
 	{
 	  perror ("tty read");
 	  fflush (stderr);
-	  close (ttyfd);
+	  ignore_value (close (ttyfd));
 	  ttyfd = -1;
 	  r = 0;
 	}