daemon/app_supervisor.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*
   3  * LADI Session Handler (ladish)
   4  *
   5  * Copyright (C) 2009 Nedko Arnaudov <nedko@arnaudov.name>
   6  *
   7  **************************************************************************
   8  * This file contains implementation of app supervisor object
   9  **************************************************************************
  10  *
  11  * LADI Session Handler is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * LADI Session Handler is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
  23  * or write to the Free Software Foundation, Inc.,
  24  * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "app_supervisor.h"
  28 #include "../dbus/error.h"
  29 #include "../dbus_constants.h"
  30 #include "loader.h"
  31
  32 struct ladish_app
  33 {
  34   struct list_head siblings;
  35   uint64_t id;
  36   char * name;
  37   char * commandline;
  38 };
  39
  40 struct ladish_app_supervisor
  41 {
  42   char * name;
  43   char * opath;
  44   uint64_t version;
  45   uint64_t next_id;
  46   struct list_head applist;
  47 };
  48
  49 bool ladish_app_supervisor_create(ladish_app_supervisor_handle * supervisor_handle_ptr, const char * opath, const char * name)
  50 {
  51   struct ladish_app_supervisor * supervisor_ptr;
  52
  53   supervisor_ptr = malloc(sizeof(struct ladish_app_supervisor));
  54   if (supervisor_ptr == NULL)
  55   {
  56     log_error("malloc() failed to allocate struct ladish_app_supervisor");
  57     return false;
  58   }
  59
  60   supervisor_ptr->opath = strdup(opath);
  61   if (supervisor_ptr->opath == NULL)
  62   {
  63     log_error("strdup() failed for app supervisor opath");
  64     free(supervisor_ptr);
  65     return false;
  66   }
  67
  68   supervisor_ptr->name = strdup(name);
  69   if (supervisor_ptr->name == NULL)
  70   {
  71     log_error("strdup() failed for app supervisor name");
  72     free(supervisor_ptr->opath);
  73     free(supervisor_ptr);
  74     return false;
  75   }
  76
  77   supervisor_ptr->version = 0;
  78   supervisor_ptr->next_id = 1;
  79
  80   INIT_LIST_HEAD(&supervisor_ptr->applist);
  81
  82   *supervisor_handle_ptr = (ladish_app_supervisor_handle)supervisor_ptr;
  83
  84   return true;
  85 }
  86
  87 #define supervisor_ptr ((struct ladish_app_supervisor *)supervisor_handle)
  88
  89 void ladish_app_supervisor_destroy(ladish_app_supervisor_handle supervisor_handle)
  90 {
  91   struct ladish_app * app_ptr;
  92
  93   while (!list_empty(&supervisor_ptr->applist))
  94   {
  95     app_ptr = list_entry(supervisor_ptr->applist.next, struct ladish_app, siblings);
  96     list_del(&app_ptr->siblings);
  97     free(app_ptr->name);
  98     free(app_ptr->commandline);
  99     free(app_ptr);
 100   }
 101
 102   free(supervisor_ptr->name);
 103   free(supervisor_ptr->opath);
 104   free(supervisor_ptr);
 105 }
 106
 107 #undef supervisor_ptr
 108 #define supervisor_ptr ((struct ladish_app_supervisor *)call_ptr->iface_context)
 109
 110 static void get_all(struct dbus_method_call * call_ptr)
 111 {
 112   DBusMessageIter iter, array_iter, struct_iter;
 113   struct list_head * node_ptr;
 114   struct ladish_app * app_ptr;
 115
 116   log_info("get_all called");
 117
 118   call_ptr->reply = dbus_message_new_method_return(call_ptr->message);
 119   if (call_ptr->reply == NULL)
 120   {
 121     goto fail;
 122   }
 123
 124   dbus_message_iter_init_append(call_ptr->reply, &iter);
 125
 126   if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_UINT64, &supervisor_ptr->version))
 127   {
 128     goto fail_unref;
 129   }
 130
 131   if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ts)", &array_iter))
 132   {
 133     goto fail_unref;
 134   }
 135
 136   list_for_each(node_ptr, &supervisor_ptr->applist)
 137   {
 138     app_ptr = list_entry(node_ptr, struct ladish_app, siblings);
 139
 140     if (!dbus_message_iter_open_container (&array_iter, DBUS_TYPE_STRUCT, NULL, &struct_iter))
 141     {
 142       goto fail_unref;
 143     }
 144
 145     if (!dbus_message_iter_append_basic(&struct_iter, DBUS_TYPE_UINT64, &app_ptr->id))
 146     {
 147       goto fail_unref;
 148     }
 149
 150     log_info("app '%s' (%llu)", app_ptr->name, (unsigned long long)app_ptr->id);
 151     if (!dbus_message_iter_append_basic(&struct_iter, DBUS_TYPE_STRING, &app_ptr->name))
 152     {
 153       goto fail_unref;
 154     }
 155
 156     if (!dbus_message_iter_close_container(&array_iter, &struct_iter))
 157     {
 158       goto fail_unref;
 159     }
 160   }
 161
 162   if (!dbus_message_iter_close_container(&iter, &array_iter))
 163   {
 164     goto fail_unref;
 165   }
 166
 167   return;
 168
 169 fail_unref:
 170   dbus_message_unref(call_ptr->reply);
 171   call_ptr->reply = NULL;
 172
 173 fail:
 174   log_error("Ran out of memory trying to construct method return");
 175 }
 176
 177 static void run_custom(struct dbus_method_call * call_ptr)
 178 {
 179   dbus_bool_t terminal;
 180   const char * commandline;
 181   pid_t pid;
 182
 183   if (!dbus_message_get_args(call_ptr->message, &g_dbus_error, DBUS_TYPE_BOOLEAN, &terminal, DBUS_TYPE_STRING, &commandline, DBUS_TYPE_INVALID))
 184   {
 185     lash_dbus_error(call_ptr, LASH_DBUS_ERROR_INVALID_ARGS, "Invalid arguments to method \"%s\": %s",  call_ptr->method_name, g_dbus_error.message);
 186     dbus_error_free(&g_dbus_error);
 187     return;
 188   }
 189
 190   log_info("run_custom(%s,'%s') called", terminal ? "terminal" : "shell", commandline);
 191
 192   if (!loader_execute(supervisor_ptr->name, "xxx", "/", terminal, commandline, &pid))
 193   {
 194     lash_dbus_error(call_ptr, LASH_DBUS_ERROR_GENERIC, "Execution of '%s' failed",  commandline);
 195     return;
 196   }
 197
 198   log_info("pid is %lu", (unsigned long)pid);
 199
 200   method_return_new_void(call_ptr);
 201 }
 202
 203 #undef supervisor_ptr
 204
 205 METHOD_ARGS_BEGIN(GetAll, "Get list of running apps")
 206   METHOD_ARG_DESCRIBE_OUT("list_version", "t", "Version of the list")
 207   METHOD_ARG_DESCRIBE_OUT("apps_list", "a(ts)", "List of running apps")
 208 METHOD_ARGS_END
 209
 210 METHOD_ARGS_BEGIN(RunCustom, "Start application by supplying commandline")
 211   METHOD_ARG_DESCRIBE_IN("terminal", "b", "Whether to run in terminal")
 212   METHOD_ARG_DESCRIBE_IN("commandline", "s", "Commandline")
 213 METHOD_ARGS_END
 214
 215 METHODS_BEGIN
 216   METHOD_DESCRIBE(GetAll, get_all)
 217   METHOD_DESCRIBE(RunCustom, run_custom)
 218 METHODS_END
 219
 220 SIGNALS_BEGIN
 221 SIGNALS_END
 222
 223 INTERFACE_BEGIN(g_iface_app_supervisor, IFACE_APP_SUPERVISOR)
 224   INTERFACE_DEFAULT_HANDLER
 225   INTERFACE_EXPOSE_METHODS
 226   INTERFACE_EXPOSE_SIGNALS
 227 INTERFACE_END