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 #include "dbus-common.h"
  28
  29 #define BUS_PATH_INTERFACE                                              \
  30         " <interface name=\"org.freedesktop.systemd1.Path\">\n"         \
  31         "  <property name=\"Unit\" type=\"s\" access=\"read\"/>\n"      \
  32         "  <property name=\"Paths\" type=\"a(ss)\" access=\"read\"/>\n" \
  33         "  <property name=\"MakeDirectory\" type=\"b\" access=\"read\"/>\n" \
  34         "  <property name=\"DirectoryMode\" type=\"u\" access=\"read\"/>\n" \
  35         " </interface>\n"
  36
  37 #define INTROSPECTION                                                   \
  38         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  39         "<node>\n"                                                      \
  40         BUS_UNIT_INTERFACE                                              \
  41         BUS_PATH_INTERFACE                                              \
  42         BUS_PROPERTIES_INTERFACE                                        \
  43         BUS_PEER_INTERFACE                                              \
  44         BUS_INTROSPECTABLE_INTERFACE                                    \
  45         "</node>\n"
  46
  47 #define INTERFACES_LIST                              \
  48         BUS_UNIT_INTERFACES_LIST                     \
  49         "org.freedesktop.systemd1.Path\0"
  50
  51 const char bus_path_interface[] _introspect_("Path") = BUS_PATH_INTERFACE;
  52
  53 static int bus_path_append_paths(DBusMessageIter *i, const char *property, void *data) {
  54         Path *p = data;
  55         DBusMessageIter sub, sub2;
  56         PathSpec *k;
  57
  58         assert(i);
  59         assert(property);
  60         assert(p);
  61
  62         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(ss)", &sub))
  63                 return -ENOMEM;
  64
  65         LIST_FOREACH(spec, k, p->specs) {
  66                 const char *t = path_type_to_string(k->type);
  67
  68                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
  69                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &t) ||
  70                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &k->path) ||
  71                     !dbus_message_iter_close_container(&sub, &sub2))
  72                         return -ENOMEM;
  73         }
  74
  75         if (!dbus_message_iter_close_container(i, &sub))
  76                 return -ENOMEM;
  77
  78         return 0;
  79 }
  80
  81 static int bus_path_append_unit(DBusMessageIter *i, const char *property, void *data) {
  82         Unit *u = data;
  83         const char *t;
  84
  85         assert(i);
  86         assert(property);
  87         assert(u);
  88
  89         t = u->path.unit ? u->path.unit->meta.id : "";
  90
  91         return dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t) ? 0 : -ENOMEM;
  92 }
  93
  94 DBusHandlerResult bus_path_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
  95         const BusProperty properties[] = {
  96                 BUS_UNIT_PROPERTIES,
  97                 { "org.freedesktop.systemd1.Path", "Unit",          bus_path_append_unit,     "s",     u                        },
  98                 { "org.freedesktop.systemd1.Path", "Paths",         bus_path_append_paths,    "a(ss)", u                        },
  99                 { "org.freedesktop.systemd1.Path", "MakeDirectory", bus_property_append_bool, "b",     &u->path.make_directory  },
 100                 { "org.freedesktop.systemd1.Path", "DirectoryMode", bus_property_append_mode, "u",     &u->path.directory_mode  },
 101                 { NULL, NULL, NULL, NULL, NULL }
 102         };
 103
 104         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, properties);
 105 }