src/dbus-path.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
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23
  24 #include "dbus-unit.h"
  25 #include "dbus-path.h"
  26 #include "dbus-execute.h"
  27
  28 #define BUS_PATH_INTERFACE                                              \
  29         " <interface name=\"org.freedesktop.systemd1.Path\">\n"         \
  30         "  <property name=\"Unit\" type=\"s\" access=\"read\"/>\n"      \
  31         "  <property name=\"Paths\" type=\"a(ss)\" access=\"read\"/>\n" \
  32         " </interface>\n"
  33
  34 #define INTROSPECTION                                                   \
  35         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  36         "<node>\n"                                                      \
  37         BUS_UNIT_INTERFACE                                              \
  38         BUS_PATH_INTERFACE                                              \
  39         BUS_PROPERTIES_INTERFACE                                        \
  40         BUS_PEER_INTERFACE                                              \
  41         BUS_INTROSPECTABLE_INTERFACE                                    \
  42         "</node>\n"
  43
  44 #define INTERFACES_LIST                              \
  45         BUS_UNIT_INTERFACES_LIST                     \
  46         "org.freedesktop.systemd1.Path\0"
  47
  48 const char bus_path_interface[] _introspect_("Path") = BUS_PATH_INTERFACE;
  49
  50 static int bus_path_append_paths(Manager *m, DBusMessageIter *i, const char *property, void *data) {
  51         Path *p = data;
  52         DBusMessageIter sub, sub2;
  53         PathSpec *k;
  54
  55         assert(m);
  56         assert(i);
  57         assert(property);
  58         assert(p);
  59
  60         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(ss)", &sub))
  61                 return -ENOMEM;
  62
  63         LIST_FOREACH(spec, k, p->specs) {
  64                 const char *t = path_type_to_string(k->type);
  65
  66                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
  67                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &t) ||
  68                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &k->path) ||
  69                     !dbus_message_iter_close_container(&sub, &sub2))
  70                         return -ENOMEM;
  71         }
  72
  73         if (!dbus_message_iter_close_container(i, &sub))
  74                 return -ENOMEM;
  75
  76         return 0;
  77 }
  78
  79 static int bus_path_append_unit(Manager *m, DBusMessageIter *i, const char *property, void *data) {
  80         Unit *u = data;
  81         const char *t;
  82
  83         assert(m);
  84         assert(i);
  85         assert(property);
  86         assert(u);
  87
  88         t = u->path.unit ? u->path.unit->meta.id : "";
  89
  90         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
  91 }
  92
  93 DBusHandlerResult bus_path_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
  94         const BusProperty properties[] = {
  95                 BUS_UNIT_PROPERTIES,
  96                 { "org.freedesktop.systemd1.Path", "Unit",  bus_path_append_unit,       "s",     u                      },
  97                 { "org.freedesktop.systemd1.Path", "Paths", bus_path_append_paths,      "a(ss)", u                      },
  98                 { NULL, NULL, NULL, NULL, NULL }
  99         };
 100
 101         return bus_default_message_handler(u->meta.manager, c, message, INTROSPECTION, INTERFACES_LIST, properties);
 102 }