1 files changed, 75 insertions, 0 deletions
diff --git a/tools/linux/ck-get-x11-server-pid.c b/tools/linux/ck-get-x11-server-pid.c
new file mode 100644
index 0000000..4e5d6c5
--- /dev/null
+++ b/tools/linux/ck-get-x11-server-pid.c
@@ -0,0 +1,75 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: William Jon McCann <mccann@jhu.edu>
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <gdk/gdk.h>
+#include <gdk/gdkx.h>
+
+static void
+print_peer_pid (int fd)
+{
+#ifdef SO_PEERCRED
+        struct ucred cr;
+        int cr_len = sizeof (cr);
+
+        if (getsockopt (fd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_len) == 0 && cr_len == sizeof (cr)) {
+                /* paranoia check for peer running as root */
+                if (cr.uid == 0) {
+                        printf ("%u\n", cr.pid);
+                }
+        } else {
+                g_warning ("Failed to getsockopt() credentials, returned len %d/%d: %s\n",
+                           cr_len,
+                           (int) sizeof (cr),
+                           g_strerror (errno));
+        }
+#endif
+}
+
+int
+main (int    argc,
+      char **argv)
+{
+        int fd;
+        int ret;
+
+        ret = 1;
+
+        gdk_init (&argc, &argv);
+
+        fd = ConnectionNumber (GDK_DISPLAY());
+
+        if (fd > 0) {
+                ret = 0;
+                print_peer_pid (fd);
+        }
+
+	return ret;
+}