From 05391989747e3c6044329002f0786c37f34a2f6c Mon Sep 17 00:00:00 2001
From: Alan Coopersmith <[email protected]>
Date: Tue, 29 Dec 2015 15:51:45 -0800
Subject: [PATCH 07/19] solaris-notty

Workaround the Solaris PAM & auditing subsystems requirements that
every session cannot be attributed to a single device file, as if
we all still logged in on serial terminals.

Original date:2009-10-16 owner:yippi type:branding
---
 daemon/gdm-manager.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 daemon/gdm-server.c  | 37 +++++++++++++++++++++++++++++++++----
 2 files changed, 81 insertions(+), 4 deletions(-)

diff --git a/daemon/gdm-manager.c b/daemon/gdm-manager.c
index 3d1d2eb..46c07ca 100644
--- a/daemon/gdm-manager.c
+++ b/daemon/gdm-manager.c
@@ -29,6 +29,11 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
+#ifdef __sun
+#include <utime.h>
+#include <sys/param.h>
+#endif
+
 #include <glib.h>
 #include <glib/gi18n.h>
 #include <glib/gstdio.h>
@@ -2467,6 +2472,46 @@ clean_embryonic_user_session (GdmSession *session)
         g_object_unref (session);
 }
 
+static void
+create_device (const char *dev)
+{
+#ifdef __sun
+        gchar buf[MAXPATHLEN + 1];
+        struct stat st;
+
+        if (dev == NULL || dev[0] == '\0')
+                return;
+
+        if (strcmp (dev, "/dev/dtlocal")  != 0 &&
+            strcmp (dev, "/dev/dtremote") != 0 )
+                return;
+
+        memset (buf, 0, sizeof (gchar) * (MAXPATHLEN + 1));
+
+        if (stat (dev, &st) != 0) {
+                g_debug ("Creating pseudo-device %s", dev);
+                symlink ("/dev/null", dev);
+        } else if (readlink (dev, buf, MAXPATHLEN) > 0) {
+                if (strcmp (buf, "/dev/null") == 0) {
+                        /* Touch symlink */
+                        struct utimbuf  timebuf;
+
+                        timebuf.modtime = time ((time_t *) 0);
+                        timebuf.actime  = timebuf.modtime;
+
+                        if ((utime (dev, &timebuf)) != 0)
+                                g_debug ("Problem updating access time of pseudo-device %s", dev);
+                        else
+                                g_debug ("Touching pseudo-device %s", dev);
+                } else {
+                        g_debug ("Device %s points to %s", dev, buf);
+                }
+        } else {
+                g_debug ("Device %s is not a symlink", dev);
+        }
+#endif
+}
+
 static GdmSession *
 create_embryonic_user_session_for_display (GdmManager *manager,
                                            GdmDisplay *display,
@@ -2490,6 +2535,9 @@ create_embryonic_user_session_for_display (GdmManager *manager,
                       "seat-id", &display_seat_id,
                       NULL);
         display_device = get_display_device (manager, display);
+        if (!display_device && !display_is_local)
+                display_device = g_strdup ("/dev/dtremote");
+        create_device (display_device);
 
         session = gdm_session_new (GDM_SESSION_VERIFICATION_MODE_LOGIN,
                                    allowed_user,
diff --git a/daemon/gdm-server.c b/daemon/gdm-server.c
index 2cec263..77c18a8 100644
--- a/daemon/gdm-server.c
+++ b/daemon/gdm-server.c
@@ -96,6 +96,7 @@ struct GdmServerPrivate
         guint    child_watch_id;
 
         gboolean is_initial;
+        gboolean is_local;
 };
 
 enum {
@@ -146,15 +147,43 @@ _gdm_server_query_ck_for_display_device (GdmServer *server)
                                          NULL,
                                          &status,
                                          &error);
+        g_free (command);
+
         if (! res) {
                 g_warning ("Could not run helper: %s", error->message);
                 g_error_free (error);
-        } else {
-                out = g_strstrip (out);
-                g_debug ("GdmServer: Got tty: '%s'", out);
+                g_free (out);
+                return NULL;
         }
 
-        g_free (command);
+        out = g_strstrip (out);
+
+        /* There are several scenarios that the device will be "?"
+         * 1. Local sessions without VT support. If the display is ":0",
+         *    we set the device as "/dev/console" to gain device permissions.
+         *    This only happens on those systems do not has VT support such as
+         *    old Solaris. So far, Linux and OpenSolaris with VT support.
+         * 2. XDMCP sessions, we set device as "/dev/dtremote"
+         * 3. Local sessions like Sun Ray, Xvfb, Xvnc, we set device as
+         *    "/dev/dtlocal"
+         */
+        if (g_str_equal (out, "?")) {
+                if (!server->priv->is_local) {
+                        /* This is for XDMCP sessions. */
+                        out = g_strdup ("/dev/dtremote");
+                } else  {
+                        if (g_str_equal (server->priv->display_name, ":0")) {
+                                /* This is for local session run on console. */
+                                out = g_strdup ("/dev/console");
+                        } else {
+                                /* This is for local sessions like
+                                 * Sun Ray, Xvfb, Xvnc, etc. */
+                                out = g_strdup ("/dev/dtlocal");
+                        }
+                }
+        }
+
+        g_debug ("GdmServer: Got tty: '%s'", out);
 
         return out;
 }
-- 
2.7.4