added a way to disconnect a session from within a session

xrdp/xrdp_mm.c

@@ -99,6 +99,10 @@ xrdp_mm_delete(struct xrdp_mm* self)
   self->sesman_trans_up = 0;
   list_delete(self->login_names);
   list_delete(self->login_values);
+  if (self->dis_wo > 0)
+  {
+    g_delete_wait_obj(self->dis_wo);
+  }
   g_free(self);
 }
 
@@ -147,6 +151,10 @@ xrdp_mm_send_login(struct xrdp_mm* self)
     xrdp_wm_log_msg(self->wm, "Error finding username and password");
     return 1;
   }
+  else
+  {
+    g_strncpy(self->username, username, 255);
+  }
 
   s = trans_get_out_s(self->sesman_trans, 8192);
   s_push_layer(s, channel_hdr, 8);
@@ -658,6 +666,8 @@ xrdp_mm_process_login_response(struct xrdp_mm* self, struct stream* s)
   int display = 0;
   int rv = 0;
   int index = 0;
+  int uid;
+  int gid;
   char text[256];
   char ip[256];
   char port[256];
@@ -724,6 +734,17 @@ xrdp_mm_process_login_response(struct xrdp_mm* self, struct stream* s)
         }
       }
     }
+    g_snprintf(text, 255, "xrdp_disconnect_display_%d", self->display);
+    self->dis_wo = g_create_wait_obj(text);
+    if (self->dis_wo > 0)
+    {
+      g_snprintf(text, 255, "/tmp/xrdp_disconnect_display_%d",
+                 self->display);
+      if (g_getuser_info(self->username, &uid, &gid, 0, 0, 0) == 0)
+      {
+        g_chown(text, uid, gid);
+      }
+    }
   }
   else
   {
@@ -1009,6 +1030,11 @@ xrdp_mm_get_wait_objs(struct xrdp_mm* self,
   {
     trans_get_wait_objs(self->chan_trans, read_objs, rcount, timeout);
   }
+  if (self->dis_wo > 0)
+  {
+    read_objs[*rcount] = self->dis_wo;
+    (*rcount)++;
+  }
   if (self->mod != 0)
   {
     if (self->mod->mod_get_wait_objs != 0)
@@ -1046,6 +1072,15 @@ xrdp_mm_check_wait_objs(struct xrdp_mm* self)
       self->delete_chan_trans = 1;
     }
   }
+  if (self->dis_wo > 0)
+  {
+    if (g_is_wait_obj_set(self->dis_wo))
+    {
+      g_writeln("xrdp_mm_check_wait_objs: disconnecting per user request");
+      g_reset_wait_obj(self->dis_wo);
+      return 1;
+    }
+  }
   if (self->mod != 0)
   {
     if (self->mod->mod_check_wait_objs != 0)

xrdp/xrdp_types.h

@@ -191,6 +191,8 @@ struct xrdp_mm
   struct trans* chan_trans; /* connection to chansrv */
   int chan_trans_up; /* true once connected to chansrv */
   int delete_chan_trans; /* boolean set when done with channel connection */
+  tbus dis_wo;
+  char username[256];
 };
 
 struct xrdp_key_info