[phodav: 7/14] spice: print err when g_open fails

[Marc-André Lureau <malureau src gnome org>]

commit a8ade597691b4dd443df6108dfc8da1c6d3f2b9e
Author: Jakub Janků <jjanku redhat com>
Date:   Sun May 12 13:09:44 2019 +0200

    spice: print err when g_open fails
    
    Don't fail silently when we cannot open the webdav virtio port.
    
    Signed-off-by: Jakub Janků <jjanku redhat com>

 spice/spice-webdavd.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/spice/spice-webdavd.c b/spice/spice-webdavd.c
index a6a4fb1..4d3ca7e 100644
--- a/spice/spice-webdavd.c
+++ b/spice/spice-webdavd.c
@@ -25,6 +25,7 @@
 #include <fcntl.h>
 #include <glib/gstdio.h>
 #include <glib-unix.h>
+#include <errno.h>
 #endif
 
 #ifdef G_OS_WIN32
@@ -712,8 +713,12 @@ open_mux_path (const char *path)
   g_debug ("Open %s", path);
 #ifdef G_OS_UNIX
   port_fd = g_open (path, O_RDWR);
+  gint errsv = errno;
   if (port_fd == -1)
+    {
+      g_printerr("Failed to open %s: %s\n", path, g_strerror(errsv));
       exit (1);
+    }
 
   wait_for_virtio_host (port_fd);