scripts/dhclient-script.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include <dbus/dbus.h>
  31
  32 extern char **environ;
  33
  34 static void append(DBusMessageIter *dict, const char *pattern)
  35 {
  36         DBusMessageIter entry;
  37         const char *key, *value;
  38         char *delim;
  39
  40         delim = strchr(pattern, '=');
  41         *delim = '\0';
  42
  43         key = pattern;
  44         value = delim + 1;
  45
  46         dbus_message_iter_open_container(dict, DBUS_TYPE_DICT_ENTRY,
  47                                                         NULL, &entry);
  48
  49         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);
  50
  51         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &value);
  52
  53         dbus_message_iter_close_container(dict, &entry);
  54 }
  55
  56 int main(int argc, char *argv[])
  57 {
  58         DBusConnection *conn;
  59         DBusError error;
  60         DBusMessage *msg;
  61         DBusMessageIter iter, dict;
  62         dbus_uint32_t pid;
  63         char **envp, *busname, *busintf, *buspath, *reason, *interface;
  64
  65         busname = getenv("BUSNAME");
  66         busintf = getenv("BUSINTF");
  67         buspath = getenv("BUSPATH");
  68
  69         if (busname == NULL || busintf == NULL || buspath == NULL)
  70                 return 0;
  71
  72         pid = atoi(getenv("pid"));
  73         reason = getenv("reason");
  74         interface = getenv("interface");
  75
  76         if (pid == 0 || reason == NULL)
  77                 return 0;
  78
  79         dbus_error_init(&error);
  80
  81         conn = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
  82         if (conn == NULL) {
  83                 if (dbus_error_is_set(&error) == TRUE) {
  84                         fprintf(stderr, "%s\n", error.message);
  85                         dbus_error_free(&error);
  86                 } else
  87                         fprintf(stderr, "Failed to get on system bus\n");
  88                 return 0;
  89         }
  90
  91         msg = dbus_message_new_method_call(busname, buspath,
  92                                                         busintf, "Notify");
  93         if (msg == NULL) {
  94                 dbus_connection_unref(conn);
  95                 fprintf(stderr, "Failed to allocate method call\n");
  96                 return 0;
  97         }
  98
  99         dbus_message_set_no_reply(msg, TRUE);
 100
 101         dbus_message_append_args(msg, DBUS_TYPE_UINT32, &pid,
 102                                 DBUS_TYPE_STRING, &reason, DBUS_TYPE_INVALID);
 103
 104         dbus_message_iter_init_append(msg, &iter);
 105
 106         dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
 107                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 108                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_STRING_AS_STRING
 109                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
 110
 111         for (envp = environ; envp && *envp; envp++) {
 112                 if (strlen(*envp) < 5)
 113                         continue;
 114
 115                 if (strncmp(*envp, "new_", 4) == 0 ||
 116                                 strncmp(*envp, "old_", 4) == 0 ||
 117                                         strncmp(*envp, "alia", 4) == 0)
 118                         append(&dict, *envp);
 119         }
 120
 121         dbus_message_iter_close_container(&iter, &dict);
 122
 123         if (dbus_connection_send(conn, msg, NULL) == FALSE)
 124                 fprintf(stderr, "Failed to send message\n");
 125
 126         dbus_connection_flush(conn);
 127
 128         dbus_message_unref(msg);
 129
 130         dbus_connection_unref(conn);
 131
 132         return 0;
 133 }