[Xen-changelog] Make the master fd belonging to the pty pair non-blocking. Writes were blocking

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User emellor@xxxxxxxxxxxxxxxxxxxxxx
# Node ID 95584b819b72a87775584323b27731ddab7111f2
# Parent  1e6fa31fb7801502e0d517d9f30e4cef96d1d5a1
Make the master fd belonging to the pty pair non-blocking.  Writes were blocking
if the console client disconnected before all the data had been written to the
pty, even though the select call had indicated that the fd was previously
writable.  Reads have been observed exhibiting similar behaviour too.

Closes bug #380.

Signed-off-by: Ewan Mellor <ewan@xxxxxxxxxxxxx>

diff -r 1e6fa31fb780 -r 95584b819b72 tools/console/daemon/io.c
--- a/tools/console/daemon/io.c Mon Dec  5 15:36:11 2005
+++ b/tools/console/daemon/io.c Tue Dec  6 16:40:43 2005
@@ -180,6 +180,9 @@
                free(path);
                if (!success)
                        goto out;
+
+               if (fcntl(master, F_SETFL, O_NONBLOCK) == -1)
+                       goto out;
        }
 
        return master;

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