Fix reading input without echoing on MS-Windows.

 src/minibuf.c (read_minibuf_noninteractive) [WINDOWSNT]: Switch stdin
 to binary mode when not echoing input.

Fixes: debbugs:17839

2 files changed, 11 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index a016f3cadc2..282b79eef12 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -2,6 +2,7 @@
 
         * minibuf.c (read_minibuf_noninteractive): Finish reading on '\r',
         not only on '\n'.
+        [WINDOWSNT]: Switch stdin to binary mode when not echoing input.
 
         * sysdep.c (emacs_get_tty, emacs_set_tty, suppress_echo_on_tty)
         [DOS_NT]: Implement for WINDOWSNT.
diff --git a/src/minibuf.c b/src/minibuf.c
index c77f5955d86..5b6c9154621 100644
--- a/src/minibuf.c
+++ b/src/minibuf.c
@@ -22,6 +22,10 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <errno.h>
 #include <stdio.h>
 
+#ifdef WINDOWSNT
+#include <fcntl.h>      /* For O_BINARY, O_TEXT. */
+#endif
+
 #include "lisp.h"
 #include "commands.h"
 #include "character.h"
@@ -240,6 +244,9 @@ read_minibuf_noninteractive (Lisp_Object map, Lisp_Object initial,
   if (hide_char)
     {
       emacs_get_tty (fileno (stdin), &etty);
+#ifdef WINDOWSNT
+      _setmode (fileno (stdin), O_BINARY);
+#endif
       suppress_echo_on_tty (fileno (stdin));
     }
 
@@ -278,6 +285,9 @@ read_minibuf_noninteractive (Lisp_Object map, Lisp_Object initial,
     {
       fprintf (stdout, "\n");
       emacs_set_tty (fileno (stdin), &etty, 0);
+#ifdef WINDOWSNT
+      _setmode (fileno (stdin), O_TEXT);
+#endif
     }
 
   if (len || c == '\n' || c == '\r')