From f0920f2896c409d519e51744a2e2618a99ec8b8c Mon Sep 17 00:00:00 2001
From: graham.gower <graham.gower@e8e0d7a0-c8d9-11dd-a880-a1081c7ac358>
Date: Thu, 12 Nov 2009 01:38:44 -0500
Subject: Don't prompt for user input from stdin if it's not a tty.

Based off a patch by Chris Larson <clarson@mvista.com> for OpenEmbedded.

git-svn-id: http://opkg.googlecode.com/svn/trunk@290 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358
---
diff --git a/libopkg/opkg_install.c b/libopkg/opkg_install.c
index a76322d..52af71e 100644
--- a/libopkg/opkg_install.c
+++ b/libopkg/opkg_install.c
@@ -1608,6 +1608,10 @@ static int user_prefers_old_conffile(const char *file_name, const char *backup)
 				       "          D     : show the differences between the versions (if diff is installed)\n"
 				       "     The default action is to keep your current version.\n"
 				       "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
+
+	  if (response == NULL)
+		  return 1;
+
 	  if (strcmp(response, "y") == 0
 	      || strcmp(response, "i") == 0
 	      || strcmp(response, "yes") == 0) {
diff --git a/libopkg/user.c b/libopkg/user.c
index 8c960dc..dda5013 100644
--- a/libopkg/user.c
+++ b/libopkg/user.c
@@ -15,13 +15,11 @@
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 */
-#include <stdlib.h>
 #include <stdio.h>
 #include <stdarg.h>
-#include <string.h>
+#include <unistd.h>
 #include "file_util.h"
 #include "str_util.h"
-#include "user.h"
 
 char *get_user_response(const char *format, ...)
 {
@@ -32,6 +30,9 @@ char *get_user_response(const char *format, ...)
 	vprintf(format, ap);
 	va_end(ap);
 
+	if (isatty(fileno(stdin)))
+		return NULL;
+
 	response = (char *)file_read_line_alloc(stdin);
 	if (response == NULL)
 		return NULL;
--
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