src/dbus-swap.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7   Copyright 2010 Maarten Lankhorst
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU General Public License as published by
  11   the Free Software Foundation; either version 2 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <errno.h>
  24
  25 #include "dbus-unit.h"
  26 #include "dbus-swap.h"
  27 #include "dbus-execute.h"
  28
  29 #define BUS_SWAP_INTERFACE                                              \
  30         " <interface name=\"org.freedesktop.systemd1.Swap\">\n"         \
  31         "  <property name=\"What\" type=\"s\" access=\"read\"/>\n"      \
  32         "  <property name=\"Priority\" type=\"i\" access=\"read\"/>\n"  \
  33         "  <property name=\"TimeoutUSec\" type=\"t\" access=\"read\"/>\n" \
  34         BUS_EXEC_COMMAND_INTERFACE("ExecActivate")                      \
  35         BUS_EXEC_COMMAND_INTERFACE("ExecDeactivate")                    \
  36         BUS_EXEC_CONTEXT_INTERFACE                                      \
  37         "  <property name=\"ControlPID\" type=\"u\" access=\"read\"/>\n" \
  38         " </interface>\n"
  39
  40 #define INTROSPECTION                                                   \
  41         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  42         "<node>\n"                                                      \
  43         BUS_UNIT_INTERFACE                                              \
  44         BUS_SWAP_INTERFACE                                              \
  45         BUS_PROPERTIES_INTERFACE                                        \
  46         BUS_PEER_INTERFACE                                              \
  47         BUS_INTROSPECTABLE_INTERFACE                                    \
  48         "</node>\n"
  49
  50 const char bus_swap_interface[] _introspect_("Swap") = BUS_SWAP_INTERFACE;
  51
  52 const char bus_swap_invalidating_properties[] =
  53         "What\0"
  54         "Priority\0"
  55         "ExecActivate\0"
  56         "ExecDeactivate\0"
  57         "ControlPID\0"
  58         "\0";
  59
  60 static int bus_swap_append_priority(Manager *m, DBusMessageIter *i, const char *property, void *data) {
  61         Swap *s = data;
  62         dbus_int32_t j;
  63
  64         assert(m);
  65         assert(i);
  66         assert(property);
  67         assert(s);
  68
  69         if (s->from_proc_swaps)
  70                 j = s->parameters_proc_swaps.priority;
  71         else if (s->from_fragment)
  72                 j = s->parameters_fragment.priority;
  73         else if (s->from_etc_fstab)
  74                 j = s->parameters_etc_fstab.priority;
  75         else
  76                 j = -1;
  77
  78         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &j))
  79                 return -ENOMEM;
  80
  81         return 0;
  82 }
  83
  84 DBusHandlerResult bus_swap_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
  85         const BusProperty properties[] = {
  86                 BUS_UNIT_PROPERTIES,
  87                 { "org.freedesktop.systemd1.Swap", "What",       bus_property_append_string, "s", u->swap.what          },
  88                 { "org.freedesktop.systemd1.Swap", "Priority",   bus_swap_append_priority,   "i", u                     },
  89                 BUS_EXEC_COMMAND_PROPERTY("org.freedesktop.systemd1.Swap", u->swap.exec_command+SWAP_EXEC_ACTIVATE,   "ExecActivate"),
  90                 BUS_EXEC_COMMAND_PROPERTY("org.freedesktop.systemd1.Swap", u->swap.exec_command+SWAP_EXEC_DEACTIVATE, "ExecDeactivate"),
  91                 BUS_EXEC_CONTEXT_PROPERTIES("org.freedesktop.systemd1.Swap", u->swap.exec_context),
  92                 { "org.freedesktop.systemd1.Swap", "ControlPID", bus_property_append_pid,    "u", &u->swap.control_pid },
  93                 { NULL, NULL, NULL, NULL, NULL }
  94         };
  95
  96         return bus_default_message_handler(u->meta.manager, c, message, INTROSPECTION, properties);
  97 }