X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/3a7c6b9e4145c1f8e123620bd2ee136a89d4f023..d47accad0f250d5d59079001443df42fb04d67f2:/unix/uxpty.c?ds=sidebyside

diff --git a/unix/uxpty.c b/unix/uxpty.c
index 708e82d6..ca7e98ad 100644
--- a/unix/uxpty.c
+++ b/unix/uxpty.c
@@ -360,8 +360,10 @@ static void pty_open_master(Pty pty)
         /*
          * Set the pty master into non-blocking mode.
          */
-        int i = 1;
-        ioctl(pty->master_fd, FIONBIO, &i);
+        int fl;
+	fl = fcntl(pty->master_fd, F_GETFL);
+	if (fl != -1 && !(fl & O_NONBLOCK))
+	    fcntl(pty->master_fd, F_SETFL, fl | O_NONBLOCK);
     }
 
     if (!ptys_by_fd)
@@ -1085,5 +1087,7 @@ Backend pty_backend = {
     pty_provide_logctx,
     pty_unthrottle,
     pty_cfg_info,
-    1
+    "pty",
+    -1,
+    0
 };